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Device : Nikon D7200 with 18-140 mm lens.
Location : Shahid Abul Khair Bhobon, Dhaka University.
Captured Date : 25 june 2016
Aperture: f/6.5
Exposure Time: 1/1225s
Flash: Off
ISO: 100
This is the Delkin Devices DC550D-P on my Canon T2i. Works great and really helps to make the LCD more visible in bright ambient light.
A number of years ago, I was playing tennis with my mate and we got talking about how my wife was complaining about my snoring. For more information please visit: www.resmed.com/in/en/consumer/snoring/how-to-stop-snoring...
The Naked 3D Fitness Tracker goes on pre-request appears to be ready to change your entire body estimation game. It is a beautiful, cutting edge, flawlessly outlined framework saddled with a sketchy name. The apparatus is in general made of an extraordinary mirror glass that outfitted with depth...
Experiment with converted IR camera using a polarizing filter and HDR software. AEB +/-2 total 3 exposures processed with Photomatix.
High Dynamic Range (HDR)
High-dynamic-range imaging (HDRI) is a high dynamic range (HDR) technique used in imaging and photography to reproduce a greater dynamic range of luminosity than is possible with standard digital imaging or photographic techniques. The aim is to present a similar range of luminance to that experienced through the human visual system. The human eye, through adaptation of the iris and other methods, adjusts constantly to adapt to a broad range of luminance present in the environment. The brain continuously interprets this information so that a viewer can see in a wide range of light conditions.
HDR images can represent a greater range of luminance levels than can be achieved using more 'traditional' methods, such as many real-world scenes containing very bright, direct sunlight to extreme shade, or very faint nebulae. This is often achieved by capturing and then combining several different, narrower range, exposures of the same subject matter. Non-HDR cameras take photographs with a limited exposure range, referred to as LDR, resulting in the loss of detail in highlights or shadows.
The two primary types of HDR images are computer renderings and images resulting from merging multiple low-dynamic-range (LDR) or standard-dynamic-range (SDR) photographs. HDR images can also be acquired using special image sensors, such as an oversampled binary image sensor.
Due to the limitations of printing and display contrast, the extended luminosity range of an HDR image has to be compressed to be made visible. The method of rendering an HDR image to a standard monitor or printing device is called tone mapping. This method reduces the overall contrast of an HDR image to facilitate display on devices or printouts with lower dynamic range, and can be applied to produce images with preserved local contrast (or exaggerated for artistic effect).
In photography, dynamic range is measured in exposure value (EV) differences (known as stops). An increase of one EV, or 'one stop', represents a doubling of the amount of light. Conversely, a decrease of one EV represents a halving of the amount of light. Therefore, revealing detail in the darkest of shadows requires high exposures, while preserving detail in very bright situations requires very low exposures. Most cameras cannot provide this range of exposure values within a single exposure, due to their low dynamic range. High-dynamic-range photographs are generally achieved by capturing multiple standard-exposure images, often using exposure bracketing, and then later merging them into a single HDR image, usually within a photo manipulation program). Digital images are often encoded in a camera's raw image format, because 8-bit JPEG encoding does not offer a wide enough range of values to allow fine transitions (and regarding HDR, later introduces undesirable effects due to lossy compression).
Any camera that allows manual exposure control can make images for HDR work, although one equipped with auto exposure bracketing (AEB) is far better suited. Images from film cameras are less suitable as they often must first be digitized, so that they can later be processed using software HDR methods.
In most imaging devices, the degree of exposure to light applied to the active element (be it film or CCD) can be altered in one of two ways: by either increasing/decreasing the size of the aperture or by increasing/decreasing the time of each exposure. Exposure variation in an HDR set is only done by altering the exposure time and not the aperture size; this is because altering the aperture size also affects the depth of field and so the resultant multiple images would be quite different, preventing their final combination into a single HDR image.
An important limitation for HDR photography is that any movement between successive images will impede or prevent success in combining them afterwards. Also, as one must create several images (often three or five and sometimes more) to obtain the desired luminance range, such a full 'set' of images takes extra time. HDR photographers have developed calculation methods and techniques to partially overcome these problems, but the use of a sturdy tripod is, at least, advised.
Some cameras have an auto exposure bracketing (AEB) feature with a far greater dynamic range than others, from the 3 EV of the Canon EOS 40D, to the 18 EV of the Canon EOS-1D Mark II. As the popularity of this imaging method grows, several camera manufactures are now offering built-in HDR features. For example, the Pentax K-7 DSLR has an HDR mode that captures an HDR image and outputs (only) a tone mapped JPEG file. The Canon PowerShot G12, Canon PowerShot S95 and Canon PowerShot S100 offer similar features in a smaller format.. Nikon's approach is called 'Active D-Lighting' which applies exposure compensation and tone mapping to the image as it comes from the sensor, with the accent being on retaing a realistic effect . Some smartphones provide HDR modes, and most mobile platforms have apps that provide HDR picture taking.
Camera characteristics such as gamma curves, sensor resolution, noise, photometric calibration and color calibration affect resulting high-dynamic-range images.
Color film negatives and slides consist of multiple film layers that respond to light differently. As a consequence, transparent originals (especially positive slides) feature a very high dynamic range
Tone mapping
Tone mapping reduces the dynamic range, or contrast ratio, of an entire image while retaining localized contrast. Although it is a distinct operation, tone mapping is often applied to HDRI files by the same software package.
Several software applications are available on the PC, Mac and Linux platforms for producing HDR files and tone mapped images. Notable titles include
Adobe Photoshop
Aurora HDR
Dynamic Photo HDR
HDR Efex Pro
HDR PhotoStudio
Luminance HDR
MagicRaw
Oloneo PhotoEngine
Photomatix Pro
PTGui
Information stored in high-dynamic-range images typically corresponds to the physical values of luminance or radiance that can be observed in the real world. This is different from traditional digital images, which represent colors as they should appear on a monitor or a paper print. Therefore, HDR image formats are often called scene-referred, in contrast to traditional digital images, which are device-referred or output-referred. Furthermore, traditional images are usually encoded for the human visual system (maximizing the visual information stored in the fixed number of bits), which is usually called gamma encoding or gamma correction. The values stored for HDR images are often gamma compressed (power law) or logarithmically encoded, or floating-point linear values, since fixed-point linear encodings are increasingly inefficient over higher dynamic ranges.
HDR images often don't use fixed ranges per color channel—other than traditional images—to represent many more colors over a much wider dynamic range. For that purpose, they don't use integer values to represent the single color channels (e.g., 0-255 in an 8 bit per pixel interval for red, green and blue) but instead use a floating point representation. Common are 16-bit (half precision) or 32-bit floating point numbers to represent HDR pixels. However, when the appropriate transfer function is used, HDR pixels for some applications can be represented with a color depth that has as few as 10–12 bits for luminance and 8 bits for chrominance without introducing any visible quantization artifacts.
History of HDR photography
The idea of using several exposures to adequately reproduce a too-extreme range of luminance was pioneered as early as the 1850s by Gustave Le Gray to render seascapes showing both the sky and the sea. Such rendering was impossible at the time using standard methods, as the luminosity range was too extreme. Le Gray used one negative for the sky, and another one with a longer exposure for the sea, and combined the two into one picture in positive.
Mid 20th century
Manual tone mapping was accomplished by dodging and burning – selectively increasing or decreasing the exposure of regions of the photograph to yield better tonality reproduction. This was effective because the dynamic range of the negative is significantly higher than would be available on the finished positive paper print when that is exposed via the negative in a uniform manner. An excellent example is the photograph Schweitzer at the Lamp by W. Eugene Smith, from his 1954 photo essay A Man of Mercy on Dr. Albert Schweitzer and his humanitarian work in French Equatorial Africa. The image took 5 days to reproduce the tonal range of the scene, which ranges from a bright lamp (relative to the scene) to a dark shadow.
Ansel Adams elevated dodging and burning to an art form. Many of his famous prints were manipulated in the darkroom with these two methods. Adams wrote a comprehensive book on producing prints called The Print, which prominently features dodging and burning, in the context of his Zone System.
With the advent of color photography, tone mapping in the darkroom was no longer possible due to the specific timing needed during the developing process of color film. Photographers looked to film manufacturers to design new film stocks with improved response, or continued to shoot in black and white to use tone mapping methods.
Color film capable of directly recording high-dynamic-range images was developed by Charles Wyckoff and EG&G "in the course of a contract with the Department of the Air Force". This XR film had three emulsion layers, an upper layer having an ASA speed rating of 400, a middle layer with an intermediate rating, and a lower layer with an ASA rating of 0.004. The film was processed in a manner similar to color films, and each layer produced a different color. The dynamic range of this extended range film has been estimated as 1:108. It has been used to photograph nuclear explosions, for astronomical photography, for spectrographic research, and for medical imaging. Wyckoff's detailed pictures of nuclear explosions appeared on the cover of Life magazine in the mid-1950s.
Late 20th century
Georges Cornuéjols and licensees of his patents (Brdi, Hymatom) introduced the principle of HDR video image, in 1986, by interposing a matricial LCD screen in front of the camera's image sensor, increasing the sensors dynamic by five stops. The concept of neighborhood tone mapping was applied to video cameras by a group from the Technion in Israel led by Dr. Oliver Hilsenrath and Prof. Y.Y.Zeevi who filed for a patent on this concept in 1988.
In February and April 1990, Georges Cornuéjols introduced the first real-time HDR camera that combined two images captured by a sensor3435 or simultaneously3637 by two sensors of the camera. This process is known as bracketing used for a video stream.
In 1991, the first commercial video camera was introduced that performed real-time capturing of multiple images with different exposures, and producing an HDR video image, by Hymatom, licensee of Georges Cornuéjols.
Also in 1991, Georges Cornuéjols introduced the HDR+ image principle by non-linear accumulation of images to increase the sensitivity of the camera: for low-light environments, several successive images are accumulated, thus increasing the signal to noise ratio.
In 1993, another commercial medical camera producing an HDR video image, by the Technion.
Modern HDR imaging uses a completely different approach, based on making a high-dynamic-range luminance or light map using only global image operations (across the entire image), and then tone mapping the result. Global HDR was first introduced in 19931 resulting in a mathematical theory of differently exposed pictures of the same subject matter that was published in 1995 by Steve Mann and Rosalind Picard.
On October 28, 1998, Ben Sarao created one of the first nighttime HDR+G (High Dynamic Range + Graphic image)of STS-95 on the launch pad at NASA's Kennedy Space Center. It consisted of four film images of the shuttle at night that were digitally composited with additional digital graphic elements. The image was first exhibited at NASA Headquarters Great Hall, Washington DC in 1999 and then published in Hasselblad Forum, Issue 3 1993, Volume 35 ISSN 0282-5449.
The advent of consumer digital cameras produced a new demand for HDR imaging to improve the light response of digital camera sensors, which had a much smaller dynamic range than film. Steve Mann developed and patented the global-HDR method for producing digital images having extended dynamic range at the MIT Media Laboratory. Mann's method involved a two-step procedure: (1) generate one floating point image array by global-only image operations (operations that affect all pixels identically, without regard to their local neighborhoods); and then (2) convert this image array, using local neighborhood processing (tone-remapping, etc.), into an HDR image. The image array generated by the first step of Mann's process is called a lightspace image, lightspace picture, or radiance map. Another benefit of global-HDR imaging is that it provides access to the intermediate light or radiance map, which has been used for computer vision, and other image processing operations.
21st century
In 2005, Adobe Systems introduced several new features in Photoshop CS2 including Merge to HDR, 32 bit floating point image support, and HDR tone mapping.
On June 30, 2016, Microsoft added support for the digital compositing of HDR images to Windows 10 using the Universal Windows Platform.
HDR sensors
Modern CMOS image sensors can often capture a high dynamic range from a single exposure. The wide dynamic range of the captured image is non-linearly compressed into a smaller dynamic range electronic representation. However, with proper processing, the information from a single exposure can be used to create an HDR image.
Such HDR imaging is used in extreme dynamic range applications like welding or automotive work. Some other cameras designed for use in security applications can automatically provide two or more images for each frame, with changing exposure. For example, a sensor for 30fps video will give out 60fps with the odd frames at a short exposure time and the even frames at a longer exposure time. Some of the sensor may even combine the two images on-chip so that a wider dynamic range without in-pixel compression is directly available to the user for display or processing.
en.wikipedia.org/wiki/High-dynamic-range_imaging
Infrared Photography
In infrared photography, the film or image sensor used is sensitive to infrared light. The part of the spectrum used is referred to as near-infrared to distinguish it from far-infrared, which is the domain of thermal imaging. Wavelengths used for photography range from about 700 nm to about 900 nm. Film is usually sensitive to visible light too, so an infrared-passing filter is used; this lets infrared (IR) light pass through to the camera, but blocks all or most of the visible light spectrum (the filter thus looks black or deep red). ("Infrared filter" may refer either to this type of filter or to one that blocks infrared but passes other wavelengths.)
When these filters are used together with infrared-sensitive film or sensors, "in-camera effects" can be obtained; false-color or black-and-white images with a dreamlike or sometimes lurid appearance known as the "Wood Effect," an effect mainly caused by foliage (such as tree leaves and grass) strongly reflecting in the same way visible light is reflected from snow. There is a small contribution from chlorophyll fluorescence, but this is marginal and is not the real cause of the brightness seen in infrared photographs. The effect is named after the infrared photography pioneer Robert W. Wood, and not after the material wood, which does not strongly reflect infrared.
The other attributes of infrared photographs include very dark skies and penetration of atmospheric haze, caused by reduced Rayleigh scattering and Mie scattering, respectively, compared to visible light. The dark skies, in turn, result in less infrared light in shadows and dark reflections of those skies from water, and clouds will stand out strongly. These wavelengths also penetrate a few millimeters into skin and give a milky look to portraits, although eyes often look black.
Until the early 20th century, infrared photography was not possible because silver halide emulsions are not sensitive to longer wavelengths than that of blue light (and to a lesser extent, green light) without the addition of a dye to act as a color sensitizer. The first infrared photographs (as distinct from spectrographs) to be published appeared in the February 1910 edition of The Century Magazine and in the October 1910 edition of the Royal Photographic Society Journal to illustrate papers by Robert W. Wood, who discovered the unusual effects that now bear his name. The RPS co-ordinated events to celebrate the centenary of this event in 2010. Wood's photographs were taken on experimental film that required very long exposures; thus, most of his work focused on landscapes. A further set of infrared landscapes taken by Wood in Italy in 1911 used plates provided for him by CEK Mees at Wratten & Wainwright. Mees also took a few infrared photographs in Portugal in 1910, which are now in the Kodak archives.
Infrared-sensitive photographic plates were developed in the United States during World War I for spectroscopic analysis, and infrared sensitizing dyes were investigated for improved haze penetration in aerial photography. After 1930, new emulsions from Kodak and other manufacturers became useful to infrared astronomy.
Infrared photography became popular with photography enthusiasts in the 1930s when suitable film was introduced commercially. The Times regularly published landscape and aerial photographs taken by their staff photographers using Ilford infrared film. By 1937 33 kinds of infrared film were available from five manufacturers including Agfa, Kodak and Ilford. Infrared movie film was also available and was used to create day-for-night effects in motion pictures, a notable example being the pseudo-night aerial sequences in the James Cagney/Bette Davis movie The Bride Came COD.
False-color infrared photography became widely practiced with the introduction of Kodak Ektachrome Infrared Aero Film and Ektachrome Infrared EIR. The first version of this, known as Kodacolor Aero-Reversal-Film, was developed by Clark and others at the Kodak for camouflage detection in the 1940s. The film became more widely available in 35mm form in the 1960s but KODAK AEROCHROME III Infrared Film 1443 has been discontinued.
Infrared photography became popular with a number of 1960s recording artists, because of the unusual results; Jimi Hendrix, Donovan, Frank and a slow shutter speed without focus compensation, however wider apertures like f/2.0 can produce sharp photos only if the lens is meticulously refocused to the infrared index mark, and only if this index mark is the correct one for the filter and film in use. However, it should be noted that diffraction effects inside a camera are greater at infrared wavelengths so that stopping down the lens too far may actually reduce sharpness.
Most apochromatic ('APO') lenses do not have an Infrared index mark and do not need to be refocused for the infrared spectrum because they are already optically corrected into the near-infrared spectrum. Catadioptric lenses do not often require this adjustment because their mirror containing elements do not suffer from chromatic aberration and so the overall aberration is comparably less. Catadioptric lenses do, of course, still contain lenses, and these lenses do still have a dispersive property.
Infrared black-and-white films require special development times but development is usually achieved with standard black-and-white film developers and chemicals (like D-76). Kodak HIE film has a polyester film base that is very stable but extremely easy to scratch, therefore special care must be used in the handling of Kodak HIE throughout the development and printing/scanning process to avoid damage to the film. The Kodak HIE film was sensitive to 900 nm.
As of November 2, 2007, "KODAK is preannouncing the discontinuance" of HIE Infrared 35 mm film stating the reasons that, "Demand for these products has been declining significantly in recent years, and it is no longer practical to continue to manufacture given the low volume, the age of the product formulations and the complexity of the processes involved." At the time of this notice, HIE Infrared 135-36 was available at a street price of around $12.00 a roll at US mail order outlets.
Arguably the greatest obstacle to infrared film photography has been the increasing difficulty of obtaining infrared-sensitive film. However, despite the discontinuance of HIE, other newer infrared sensitive emulsions from EFKE, ROLLEI, and ILFORD are still available, but these formulations have differing sensitivity and specifications from the venerable KODAK HIE that has been around for at least two decades. Some of these infrared films are available in 120 and larger formats as well as 35 mm, which adds flexibility to their application. With the discontinuance of Kodak HIE, Efke's IR820 film has become the only IR film on the marketneeds update with good sensitivity beyond 750 nm, the Rollei film does extend beyond 750 nm but IR sensitivity falls off very rapidly.
Color infrared transparency films have three sensitized layers that, because of the way the dyes are coupled to these layers, reproduce infrared as red, red as green, and green as blue. All three layers are sensitive to blue so the film must be used with a yellow filter, since this will block blue light but allow the remaining colors to reach the film. The health of foliage can be determined from the relative strengths of green and infrared light reflected; this shows in color infrared as a shift from red (healthy) towards magenta (unhealthy). Early color infrared films were developed in the older E-4 process, but Kodak later manufactured a color transparency film that could be developed in standard E-6 chemistry, although more accurate results were obtained by developing using the AR-5 process. In general, color infrared does not need to be refocused to the infrared index mark on the lens.
In 2007 Kodak announced that production of the 35 mm version of their color infrared film (Ektachrome Professional Infrared/EIR) would cease as there was insufficient demand. Since 2011, all formats of color infrared film have been discontinued. Specifically, Aerochrome 1443 and SO-734.
There is no currently available digital camera that will produce the same results as Kodak color infrared film although the equivalent images can be produced by taking two exposures, one infrared and the other full-color, and combining in post-production. The color images produced by digital still cameras using infrared-pass filters are not equivalent to those produced on color infrared film. The colors result from varying amounts of infrared passing through the color filters on the photo sites, further amended by the Bayer filtering. While this makes such images unsuitable for the kind of applications for which the film was used, such as remote sensing of plant health, the resulting color tonality has proved popular artistically.
Color digital infrared, as part of full spectrum photography is gaining popularity. The ease of creating a softly colored photo with infrared characteristics has found interest among hobbyists and professionals.
In 2008, Los Angeles photographer, Dean Bennici started cutting and hand rolling Aerochrome color Infrared film. All Aerochrome medium and large format which exists today came directly from his lab. The trend in infrared photography continues to gain momentum with the success of photographer Richard Mosse and multiple users all around the world.
Digital camera sensors are inherently sensitive to infrared light, which would interfere with the normal photography by confusing the autofocus calculations or softening the image (because infrared light is focused differently from visible light), or oversaturating the red channel. Also, some clothing is transparent in the infrared, leading to unintended (at least to the manufacturer) uses of video cameras. Thus, to improve image quality and protect privacy, many digital cameras employ infrared blockers. Depending on the subject matter, infrared photography may not be practical with these cameras because the exposure times become overly long, often in the range of 30 seconds, creating noise and motion blur in the final image. However, for some subject matter the long exposure does not matter or the motion blur effects actually add to the image. Some lenses will also show a 'hot spot' in the centre of the image as their coatings are optimised for visible light and not for IR.
An alternative method of DSLR infrared photography is to remove the infrared blocker in front of the sensor and replace it with a filter that removes visible light. This filter is behind the mirror, so the camera can be used normally - handheld, normal shutter speeds, normal composition through the viewfinder, and focus, all work like a normal camera. Metering works but is not always accurate because of the difference between visible and infrared refraction. When the IR blocker is removed, many lenses which did display a hotspot cease to do so, and become perfectly usable for infrared photography. Additionally, because the red, green and blue micro-filters remain and have transmissions not only in their respective color but also in the infrared, enhanced infrared color may be recorded.
Since the Bayer filters in most digital cameras absorb a significant fraction of the infrared light, these cameras are sometimes not very sensitive as infrared cameras and can sometimes produce false colors in the images. An alternative approach is to use a Foveon X3 sensor, which does not have absorptive filters on it; the Sigma SD10 DSLR has a removable IR blocking filter and dust protector, which can be simply omitted or replaced by a deep red or complete visible light blocking filter. The Sigma SD14 has an IR/UV blocking filter that can be removed/installed without tools. The result is a very sensitive digital IR camera.
While it is common to use a filter that blocks almost all visible light, the wavelength sensitivity of a digital camera without internal infrared blocking is such that a variety of artistic results can be obtained with more conventional filtration. For example, a very dark neutral density filter can be used (such as the Hoya ND400) which passes a very small amount of visible light compared to the near-infrared it allows through. Wider filtration permits an SLR viewfinder to be used and also passes more varied color information to the sensor without necessarily reducing the Wood effect. Wider filtration is however likely to reduce other infrared artefacts such as haze penetration and darkened skies. This technique mirrors the methods used by infrared film photographers where black-and-white infrared film was often used with a deep red filter rather than a visually opaque one.
Another common technique with near-infrared filters is to swap blue and red channels in software (e.g. photoshop) which retains much of the characteristic 'white foliage' while rendering skies a glorious blue.
Several Sony cameras had the so-called Night Shot facility, which physically moves the blocking filter away from the light path, which makes the cameras very sensitive to infrared light. Soon after its development, this facility was 'restricted' by Sony to make it difficult for people to take photos that saw through clothing. To do this the iris is opened fully and exposure duration is limited to long times of more than 1/30 second or so. It is possible to shoot infrared but neutral density filters must be used to reduce the camera's sensitivity and the long exposure times mean that care must be taken to avoid camera-shake artifacts.
Fuji have produced digital cameras for use in forensic criminology and medicine which have no infrared blocking filter. The first camera, designated the S3 PRO UVIR, also had extended ultraviolet sensitivity (digital sensors are usually less sensitive to UV than to IR). Optimum UV sensitivity requires special lenses, but ordinary lenses usually work well for IR. In 2007, FujiFilm introduced a new version of this camera, based on the Nikon D200/ FujiFilm S5 called the IS Pro, also able to take Nikon lenses. Fuji had earlier introduced a non-SLR infrared camera, the IS-1, a modified version of the FujiFilm FinePix S9100. Unlike the S3 PRO UVIR, the IS-1 does not offer UV sensitivity. FujiFilm restricts the sale of these cameras to professional users with their EULA specifically prohibiting "unethical photographic conduct".
Phase One digital camera backs can be ordered in an infrared modified form.
Remote sensing and thermographic cameras are sensitive to longer wavelengths of infrared (see Infrared spectrum#Commonly used sub-division scheme). They may be multispectral and use a variety of technologies which may not resemble common camera or filter designs. Cameras sensitive to longer infrared wavelengths including those used in infrared astronomy often require cooling to reduce thermally induced dark currents in the sensor (see Dark current (physics)). Lower cost uncooled thermographic digital cameras operate in the Long Wave infrared band (see Thermographic camera#Uncooled infrared detectors). These cameras are generally used for building inspection or preventative maintenance but can be used for artistic pursuits as well.
Apparently it has something to do with brains... so I guess it's actually worse than you might think... :)
The pleasing and cleverly designed trademark device of the United States Radiator Company of Dunkirk, N. Y. from an undated catalogue of their products [poss. c.1900-10]. This is the US Radiator COMPANY, as opposed to the US Radiator CORPORATION. I am confused by the apparent existence of two separate firms with almost identical names (as are others, it would appear from looking on Google). It seems odd that this should be the case and perhaps I have misinterpreted what clues I have picked up. I can't find any conclusive evidence on line but it may be that the two companies actually merged at some point anyway but it's hard to tell as 'corporation' and 'company' seem to be used indiscriminately in the online references I have seen.
Once you step into this thing I don't know what they did to you, but it wasn't pleasant. This item is in one of the stairwells of the fortified towers.
IR HDR. IR converted Canon Rebel XTi. AEB +/-2 total of 3 exposures processed with Photomatix.
High Dynamic Range (HDR)
High-dynamic-range imaging (HDRI) is a high dynamic range (HDR) technique used in imaging and photography to reproduce a greater dynamic range of luminosity than is possible with standard digital imaging or photographic techniques. The aim is to present a similar range of luminance to that experienced through the human visual system. The human eye, through adaptation of the iris and other methods, adjusts constantly to adapt to a broad range of luminance present in the environment. The brain continuously interprets this information so that a viewer can see in a wide range of light conditions.
HDR images can represent a greater range of luminance levels than can be achieved using more 'traditional' methods, such as many real-world scenes containing very bright, direct sunlight to extreme shade, or very faint nebulae. This is often achieved by capturing and then combining several different, narrower range, exposures of the same subject matter. Non-HDR cameras take photographs with a limited exposure range, referred to as LDR, resulting in the loss of detail in highlights or shadows.
The two primary types of HDR images are computer renderings and images resulting from merging multiple low-dynamic-range (LDR) or standard-dynamic-range (SDR) photographs. HDR images can also be acquired using special image sensors, such as an oversampled binary image sensor.
Due to the limitations of printing and display contrast, the extended luminosity range of an HDR image has to be compressed to be made visible. The method of rendering an HDR image to a standard monitor or printing device is called tone mapping. This method reduces the overall contrast of an HDR image to facilitate display on devices or printouts with lower dynamic range, and can be applied to produce images with preserved local contrast (or exaggerated for artistic effect).
In photography, dynamic range is measured in exposure value (EV) differences (known as stops). An increase of one EV, or 'one stop', represents a doubling of the amount of light. Conversely, a decrease of one EV represents a halving of the amount of light. Therefore, revealing detail in the darkest of shadows requires high exposures, while preserving detail in very bright situations requires very low exposures. Most cameras cannot provide this range of exposure values within a single exposure, due to their low dynamic range. High-dynamic-range photographs are generally achieved by capturing multiple standard-exposure images, often using exposure bracketing, and then later merging them into a single HDR image, usually within a photo manipulation program). Digital images are often encoded in a camera's raw image format, because 8-bit JPEG encoding does not offer a wide enough range of values to allow fine transitions (and regarding HDR, later introduces undesirable effects due to lossy compression).
Any camera that allows manual exposure control can make images for HDR work, although one equipped with auto exposure bracketing (AEB) is far better suited. Images from film cameras are less suitable as they often must first be digitized, so that they can later be processed using software HDR methods.
In most imaging devices, the degree of exposure to light applied to the active element (be it film or CCD) can be altered in one of two ways: by either increasing/decreasing the size of the aperture or by increasing/decreasing the time of each exposure. Exposure variation in an HDR set is only done by altering the exposure time and not the aperture size; this is because altering the aperture size also affects the depth of field and so the resultant multiple images would be quite different, preventing their final combination into a single HDR image.
An important limitation for HDR photography is that any movement between successive images will impede or prevent success in combining them afterwards. Also, as one must create several images (often three or five and sometimes more) to obtain the desired luminance range, such a full 'set' of images takes extra time. HDR photographers have developed calculation methods and techniques to partially overcome these problems, but the use of a sturdy tripod is, at least, advised.
Some cameras have an auto exposure bracketing (AEB) feature with a far greater dynamic range than others, from the 3 EV of the Canon EOS 40D, to the 18 EV of the Canon EOS-1D Mark II. As the popularity of this imaging method grows, several camera manufactures are now offering built-in HDR features. For example, the Pentax K-7 DSLR has an HDR mode that captures an HDR image and outputs (only) a tone mapped JPEG file. The Canon PowerShot G12, Canon PowerShot S95 and Canon PowerShot S100 offer similar features in a smaller format.. Nikon's approach is called 'Active D-Lighting' which applies exposure compensation and tone mapping to the image as it comes from the sensor, with the accent being on retaing a realistic effect . Some smartphones provide HDR modes, and most mobile platforms have apps that provide HDR picture taking.
Camera characteristics such as gamma curves, sensor resolution, noise, photometric calibration and color calibration affect resulting high-dynamic-range images.
Color film negatives and slides consist of multiple film layers that respond to light differently. As a consequence, transparent originals (especially positive slides) feature a very high dynamic range
Tone mapping
Tone mapping reduces the dynamic range, or contrast ratio, of an entire image while retaining localized contrast. Although it is a distinct operation, tone mapping is often applied to HDRI files by the same software package.
Several software applications are available on the PC, Mac and Linux platforms for producing HDR files and tone mapped images. Notable titles include
Adobe Photoshop
Aurora HDR
Dynamic Photo HDR
HDR Efex Pro
HDR PhotoStudio
Luminance HDR
MagicRaw
Oloneo PhotoEngine
Photomatix Pro
PTGui
Information stored in high-dynamic-range images typically corresponds to the physical values of luminance or radiance that can be observed in the real world. This is different from traditional digital images, which represent colors as they should appear on a monitor or a paper print. Therefore, HDR image formats are often called scene-referred, in contrast to traditional digital images, which are device-referred or output-referred. Furthermore, traditional images are usually encoded for the human visual system (maximizing the visual information stored in the fixed number of bits), which is usually called gamma encoding or gamma correction. The values stored for HDR images are often gamma compressed (power law) or logarithmically encoded, or floating-point linear values, since fixed-point linear encodings are increasingly inefficient over higher dynamic ranges.
HDR images often don't use fixed ranges per color channel—other than traditional images—to represent many more colors over a much wider dynamic range. For that purpose, they don't use integer values to represent the single color channels (e.g., 0-255 in an 8 bit per pixel interval for red, green and blue) but instead use a floating point representation. Common are 16-bit (half precision) or 32-bit floating point numbers to represent HDR pixels. However, when the appropriate transfer function is used, HDR pixels for some applications can be represented with a color depth that has as few as 10–12 bits for luminance and 8 bits for chrominance without introducing any visible quantization artifacts.
History of HDR photography
The idea of using several exposures to adequately reproduce a too-extreme range of luminance was pioneered as early as the 1850s by Gustave Le Gray to render seascapes showing both the sky and the sea. Such rendering was impossible at the time using standard methods, as the luminosity range was too extreme. Le Gray used one negative for the sky, and another one with a longer exposure for the sea, and combined the two into one picture in positive.
Mid 20th century
Manual tone mapping was accomplished by dodging and burning – selectively increasing or decreasing the exposure of regions of the photograph to yield better tonality reproduction. This was effective because the dynamic range of the negative is significantly higher than would be available on the finished positive paper print when that is exposed via the negative in a uniform manner. An excellent example is the photograph Schweitzer at the Lamp by W. Eugene Smith, from his 1954 photo essay A Man of Mercy on Dr. Albert Schweitzer and his humanitarian work in French Equatorial Africa. The image took 5 days to reproduce the tonal range of the scene, which ranges from a bright lamp (relative to the scene) to a dark shadow.
Ansel Adams elevated dodging and burning to an art form. Many of his famous prints were manipulated in the darkroom with these two methods. Adams wrote a comprehensive book on producing prints called The Print, which prominently features dodging and burning, in the context of his Zone System.
With the advent of color photography, tone mapping in the darkroom was no longer possible due to the specific timing needed during the developing process of color film. Photographers looked to film manufacturers to design new film stocks with improved response, or continued to shoot in black and white to use tone mapping methods.
Color film capable of directly recording high-dynamic-range images was developed by Charles Wyckoff and EG&G "in the course of a contract with the Department of the Air Force". This XR film had three emulsion layers, an upper layer having an ASA speed rating of 400, a middle layer with an intermediate rating, and a lower layer with an ASA rating of 0.004. The film was processed in a manner similar to color films, and each layer produced a different color. The dynamic range of this extended range film has been estimated as 1:108. It has been used to photograph nuclear explosions, for astronomical photography, for spectrographic research, and for medical imaging. Wyckoff's detailed pictures of nuclear explosions appeared on the cover of Life magazine in the mid-1950s.
Late 20th century
Georges Cornuéjols and licensees of his patents (Brdi, Hymatom) introduced the principle of HDR video image, in 1986, by interposing a matricial LCD screen in front of the camera's image sensor, increasing the sensors dynamic by five stops. The concept of neighborhood tone mapping was applied to video cameras by a group from the Technion in Israel led by Dr. Oliver Hilsenrath and Prof. Y.Y.Zeevi who filed for a patent on this concept in 1988.
In February and April 1990, Georges Cornuéjols introduced the first real-time HDR camera that combined two images captured by a sensor3435 or simultaneously3637 by two sensors of the camera. This process is known as bracketing used for a video stream.
In 1991, the first commercial video camera was introduced that performed real-time capturing of multiple images with different exposures, and producing an HDR video image, by Hymatom, licensee of Georges Cornuéjols.
Also in 1991, Georges Cornuéjols introduced the HDR+ image principle by non-linear accumulation of images to increase the sensitivity of the camera: for low-light environments, several successive images are accumulated, thus increasing the signal to noise ratio.
In 1993, another commercial medical camera producing an HDR video image, by the Technion.
Modern HDR imaging uses a completely different approach, based on making a high-dynamic-range luminance or light map using only global image operations (across the entire image), and then tone mapping the result. Global HDR was first introduced in 19931 resulting in a mathematical theory of differently exposed pictures of the same subject matter that was published in 1995 by Steve Mann and Rosalind Picard.
On October 28, 1998, Ben Sarao created one of the first nighttime HDR+G (High Dynamic Range + Graphic image)of STS-95 on the launch pad at NASA's Kennedy Space Center. It consisted of four film images of the shuttle at night that were digitally composited with additional digital graphic elements. The image was first exhibited at NASA Headquarters Great Hall, Washington DC in 1999 and then published in Hasselblad Forum, Issue 3 1993, Volume 35 ISSN 0282-5449.
The advent of consumer digital cameras produced a new demand for HDR imaging to improve the light response of digital camera sensors, which had a much smaller dynamic range than film. Steve Mann developed and patented the global-HDR method for producing digital images having extended dynamic range at the MIT Media Laboratory. Mann's method involved a two-step procedure: (1) generate one floating point image array by global-only image operations (operations that affect all pixels identically, without regard to their local neighborhoods); and then (2) convert this image array, using local neighborhood processing (tone-remapping, etc.), into an HDR image. The image array generated by the first step of Mann's process is called a lightspace image, lightspace picture, or radiance map. Another benefit of global-HDR imaging is that it provides access to the intermediate light or radiance map, which has been used for computer vision, and other image processing operations.
21st century
In 2005, Adobe Systems introduced several new features in Photoshop CS2 including Merge to HDR, 32 bit floating point image support, and HDR tone mapping.
On June 30, 2016, Microsoft added support for the digital compositing of HDR images to Windows 10 using the Universal Windows Platform.
HDR sensors
Modern CMOS image sensors can often capture a high dynamic range from a single exposure. The wide dynamic range of the captured image is non-linearly compressed into a smaller dynamic range electronic representation. However, with proper processing, the information from a single exposure can be used to create an HDR image.
Such HDR imaging is used in extreme dynamic range applications like welding or automotive work. Some other cameras designed for use in security applications can automatically provide two or more images for each frame, with changing exposure. For example, a sensor for 30fps video will give out 60fps with the odd frames at a short exposure time and the even frames at a longer exposure time. Some of the sensor may even combine the two images on-chip so that a wider dynamic range without in-pixel compression is directly available to the user for display or processing.
en.wikipedia.org/wiki/High-dynamic-range_imaging
Infrared Photography
In infrared photography, the film or image sensor used is sensitive to infrared light. The part of the spectrum used is referred to as near-infrared to distinguish it from far-infrared, which is the domain of thermal imaging. Wavelengths used for photography range from about 700 nm to about 900 nm. Film is usually sensitive to visible light too, so an infrared-passing filter is used; this lets infrared (IR) light pass through to the camera, but blocks all or most of the visible light spectrum (the filter thus looks black or deep red). ("Infrared filter" may refer either to this type of filter or to one that blocks infrared but passes other wavelengths.)
When these filters are used together with infrared-sensitive film or sensors, "in-camera effects" can be obtained; false-color or black-and-white images with a dreamlike or sometimes lurid appearance known as the "Wood Effect," an effect mainly caused by foliage (such as tree leaves and grass) strongly reflecting in the same way visible light is reflected from snow. There is a small contribution from chlorophyll fluorescence, but this is marginal and is not the real cause of the brightness seen in infrared photographs. The effect is named after the infrared photography pioneer Robert W. Wood, and not after the material wood, which does not strongly reflect infrared.
The other attributes of infrared photographs include very dark skies and penetration of atmospheric haze, caused by reduced Rayleigh scattering and Mie scattering, respectively, compared to visible light. The dark skies, in turn, result in less infrared light in shadows and dark reflections of those skies from water, and clouds will stand out strongly. These wavelengths also penetrate a few millimeters into skin and give a milky look to portraits, although eyes often look black.
Until the early 20th century, infrared photography was not possible because silver halide emulsions are not sensitive to longer wavelengths than that of blue light (and to a lesser extent, green light) without the addition of a dye to act as a color sensitizer. The first infrared photographs (as distinct from spectrographs) to be published appeared in the February 1910 edition of The Century Magazine and in the October 1910 edition of the Royal Photographic Society Journal to illustrate papers by Robert W. Wood, who discovered the unusual effects that now bear his name. The RPS co-ordinated events to celebrate the centenary of this event in 2010. Wood's photographs were taken on experimental film that required very long exposures; thus, most of his work focused on landscapes. A further set of infrared landscapes taken by Wood in Italy in 1911 used plates provided for him by CEK Mees at Wratten & Wainwright. Mees also took a few infrared photographs in Portugal in 1910, which are now in the Kodak archives.
Infrared-sensitive photographic plates were developed in the United States during World War I for spectroscopic analysis, and infrared sensitizing dyes were investigated for improved haze penetration in aerial photography. After 1930, new emulsions from Kodak and other manufacturers became useful to infrared astronomy.
Infrared photography became popular with photography enthusiasts in the 1930s when suitable film was introduced commercially. The Times regularly published landscape and aerial photographs taken by their staff photographers using Ilford infrared film. By 1937 33 kinds of infrared film were available from five manufacturers including Agfa, Kodak and Ilford. Infrared movie film was also available and was used to create day-for-night effects in motion pictures, a notable example being the pseudo-night aerial sequences in the James Cagney/Bette Davis movie The Bride Came COD.
False-color infrared photography became widely practiced with the introduction of Kodak Ektachrome Infrared Aero Film and Ektachrome Infrared EIR. The first version of this, known as Kodacolor Aero-Reversal-Film, was developed by Clark and others at the Kodak for camouflage detection in the 1940s. The film became more widely available in 35mm form in the 1960s but KODAK AEROCHROME III Infrared Film 1443 has been discontinued.
Infrared photography became popular with a number of 1960s recording artists, because of the unusual results; Jimi Hendrix, Donovan, Frank and a slow shutter speed without focus compensation, however wider apertures like f/2.0 can produce sharp photos only if the lens is meticulously refocused to the infrared index mark, and only if this index mark is the correct one for the filter and film in use. However, it should be noted that diffraction effects inside a camera are greater at infrared wavelengths so that stopping down the lens too far may actually reduce sharpness.
Most apochromatic ('APO') lenses do not have an Infrared index mark and do not need to be refocused for the infrared spectrum because they are already optically corrected into the near-infrared spectrum. Catadioptric lenses do not often require this adjustment because their mirror containing elements do not suffer from chromatic aberration and so the overall aberration is comparably less. Catadioptric lenses do, of course, still contain lenses, and these lenses do still have a dispersive property.
Infrared black-and-white films require special development times but development is usually achieved with standard black-and-white film developers and chemicals (like D-76). Kodak HIE film has a polyester film base that is very stable but extremely easy to scratch, therefore special care must be used in the handling of Kodak HIE throughout the development and printing/scanning process to avoid damage to the film. The Kodak HIE film was sensitive to 900 nm.
As of November 2, 2007, "KODAK is preannouncing the discontinuance" of HIE Infrared 35 mm film stating the reasons that, "Demand for these products has been declining significantly in recent years, and it is no longer practical to continue to manufacture given the low volume, the age of the product formulations and the complexity of the processes involved." At the time of this notice, HIE Infrared 135-36 was available at a street price of around $12.00 a roll at US mail order outlets.
Arguably the greatest obstacle to infrared film photography has been the increasing difficulty of obtaining infrared-sensitive film. However, despite the discontinuance of HIE, other newer infrared sensitive emulsions from EFKE, ROLLEI, and ILFORD are still available, but these formulations have differing sensitivity and specifications from the venerable KODAK HIE that has been around for at least two decades. Some of these infrared films are available in 120 and larger formats as well as 35 mm, which adds flexibility to their application. With the discontinuance of Kodak HIE, Efke's IR820 film has become the only IR film on the marketneeds update with good sensitivity beyond 750 nm, the Rollei film does extend beyond 750 nm but IR sensitivity falls off very rapidly.
Color infrared transparency films have three sensitized layers that, because of the way the dyes are coupled to these layers, reproduce infrared as red, red as green, and green as blue. All three layers are sensitive to blue so the film must be used with a yellow filter, since this will block blue light but allow the remaining colors to reach the film. The health of foliage can be determined from the relative strengths of green and infrared light reflected; this shows in color infrared as a shift from red (healthy) towards magenta (unhealthy). Early color infrared films were developed in the older E-4 process, but Kodak later manufactured a color transparency film that could be developed in standard E-6 chemistry, although more accurate results were obtained by developing using the AR-5 process. In general, color infrared does not need to be refocused to the infrared index mark on the lens.
In 2007 Kodak announced that production of the 35 mm version of their color infrared film (Ektachrome Professional Infrared/EIR) would cease as there was insufficient demand. Since 2011, all formats of color infrared film have been discontinued. Specifically, Aerochrome 1443 and SO-734.
There is no currently available digital camera that will produce the same results as Kodak color infrared film although the equivalent images can be produced by taking two exposures, one infrared and the other full-color, and combining in post-production. The color images produced by digital still cameras using infrared-pass filters are not equivalent to those produced on color infrared film. The colors result from varying amounts of infrared passing through the color filters on the photo sites, further amended by the Bayer filtering. While this makes such images unsuitable for the kind of applications for which the film was used, such as remote sensing of plant health, the resulting color tonality has proved popular artistically.
Color digital infrared, as part of full spectrum photography is gaining popularity. The ease of creating a softly colored photo with infrared characteristics has found interest among hobbyists and professionals.
In 2008, Los Angeles photographer, Dean Bennici started cutting and hand rolling Aerochrome color Infrared film. All Aerochrome medium and large format which exists today came directly from his lab. The trend in infrared photography continues to gain momentum with the success of photographer Richard Mosse and multiple users all around the world.
Digital camera sensors are inherently sensitive to infrared light, which would interfere with the normal photography by confusing the autofocus calculations or softening the image (because infrared light is focused differently from visible light), or oversaturating the red channel. Also, some clothing is transparent in the infrared, leading to unintended (at least to the manufacturer) uses of video cameras. Thus, to improve image quality and protect privacy, many digital cameras employ infrared blockers. Depending on the subject matter, infrared photography may not be practical with these cameras because the exposure times become overly long, often in the range of 30 seconds, creating noise and motion blur in the final image. However, for some subject matter the long exposure does not matter or the motion blur effects actually add to the image. Some lenses will also show a 'hot spot' in the centre of the image as their coatings are optimised for visible light and not for IR.
An alternative method of DSLR infrared photography is to remove the infrared blocker in front of the sensor and replace it with a filter that removes visible light. This filter is behind the mirror, so the camera can be used normally - handheld, normal shutter speeds, normal composition through the viewfinder, and focus, all work like a normal camera. Metering works but is not always accurate because of the difference between visible and infrared refraction. When the IR blocker is removed, many lenses which did display a hotspot cease to do so, and become perfectly usable for infrared photography. Additionally, because the red, green and blue micro-filters remain and have transmissions not only in their respective color but also in the infrared, enhanced infrared color may be recorded.
Since the Bayer filters in most digital cameras absorb a significant fraction of the infrared light, these cameras are sometimes not very sensitive as infrared cameras and can sometimes produce false colors in the images. An alternative approach is to use a Foveon X3 sensor, which does not have absorptive filters on it; the Sigma SD10 DSLR has a removable IR blocking filter and dust protector, which can be simply omitted or replaced by a deep red or complete visible light blocking filter. The Sigma SD14 has an IR/UV blocking filter that can be removed/installed without tools. The result is a very sensitive digital IR camera.
While it is common to use a filter that blocks almost all visible light, the wavelength sensitivity of a digital camera without internal infrared blocking is such that a variety of artistic results can be obtained with more conventional filtration. For example, a very dark neutral density filter can be used (such as the Hoya ND400) which passes a very small amount of visible light compared to the near-infrared it allows through. Wider filtration permits an SLR viewfinder to be used and also passes more varied color information to the sensor without necessarily reducing the Wood effect. Wider filtration is however likely to reduce other infrared artefacts such as haze penetration and darkened skies. This technique mirrors the methods used by infrared film photographers where black-and-white infrared film was often used with a deep red filter rather than a visually opaque one.
Another common technique with near-infrared filters is to swap blue and red channels in software (e.g. photoshop) which retains much of the characteristic 'white foliage' while rendering skies a glorious blue.
Several Sony cameras had the so-called Night Shot facility, which physically moves the blocking filter away from the light path, which makes the cameras very sensitive to infrared light. Soon after its development, this facility was 'restricted' by Sony to make it difficult for people to take photos that saw through clothing. To do this the iris is opened fully and exposure duration is limited to long times of more than 1/30 second or so. It is possible to shoot infrared but neutral density filters must be used to reduce the camera's sensitivity and the long exposure times mean that care must be taken to avoid camera-shake artifacts.
Fuji have produced digital cameras for use in forensic criminology and medicine which have no infrared blocking filter. The first camera, designated the S3 PRO UVIR, also had extended ultraviolet sensitivity (digital sensors are usually less sensitive to UV than to IR). Optimum UV sensitivity requires special lenses, but ordinary lenses usually work well for IR. In 2007, FujiFilm introduced a new version of this camera, based on the Nikon D200/ FujiFilm S5 called the IS Pro, also able to take Nikon lenses. Fuji had earlier introduced a non-SLR infrared camera, the IS-1, a modified version of the FujiFilm FinePix S9100. Unlike the S3 PRO UVIR, the IS-1 does not offer UV sensitivity. FujiFilm restricts the sale of these cameras to professional users with their EULA specifically prohibiting "unethical photographic conduct".
Phase One digital camera backs can be ordered in an infrared modified form.
Remote sensing and thermographic cameras are sensitive to longer wavelengths of infrared (see Infrared spectrum#Commonly used sub-division scheme). They may be multispectral and use a variety of technologies which may not resemble common camera or filter designs. Cameras sensitive to longer infrared wavelengths including those used in infrared astronomy often require cooling to reduce thermally induced dark currents in the sensor (see Dark current (physics)). Lower cost uncooled thermographic digital cameras operate in the Long Wave infrared band (see Thermographic camera#Uncooled infrared detectors). These cameras are generally used for building inspection or preventative maintenance but can be used for artistic pursuits as well.
AG2R La Mondiale
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LumiSpa device and cleanser on a pink background seen through a wiped section of glass with condensation from the shower on it.
I've been using my fitbit since early October and love it!!! I use it to track my steps and my sleep and I've found it to be amazingly accurate. It is light-weight and very easy to use. Unfortunately, the device met an early death when the faceplate decided to go on holiday from the rest of the unit... which let the little button escape, and in-turn render the whole device DOA. ...yikes!... today is a very sad day.
UPDATE: Customer Service was amazing! They sent me a replacement device really quick. 5 Star service for FitBit! Take a look at my new one here: www.flickr.com/photos/zooboing/6833388817/in/photostream
MoMA, 11 West 53rd Street, NYC
by navema
Françoise with a Bow in Her Hair (Françoise au Noeud dans les Cheveux), lithograph, June 14, 1946. Here Picasso employs some of Henri Matisse's signature devices, composing simply in lines and flat shapes. Picasso and Matisse renewed their friendship around this time, as both were in the South of France. Françoise Gilot and Matisse were also fond of each other.
Françoise Gilot (born November 26, 1921) is a French painter and bestselling author living in New York City and Paris. She is known for being the lover and artistic muse of Pablo Picasso from 1944 to 1953, and the mother of his children, Claude Picasso and Paloma Picasso. She later married the American vaccine pioneer, Jonas Salk.
She studied English literature at Cambridge University and the British Institute in Paris (now University of London Institute in Paris. While training to be a lawyer, Gilot was known to skip morning law classes to feed her true passion: art. Despite her mother being an artist herself, the extent of the young woman's artistic pursuits inexplicably drove her away from immediate family to her grandmother's attic. At 21, Gilot met Pablo Picasso, then 61. His mistress, Dora Maar, was devastated to learn that Picasso was replacing her with the much younger artist. Gilot would ultimately raise both of their children: Claude (born 1947) and Paloma (born 1949). The parents often captured their children's antics on canvas. Gilot maintained a relationship with the Spanish painter from 1944 until 1953. Eleven years after their separation Gilot wrote Life with Picasso, a book that sold over one million copies in dozens of languages despite an unsuccessful legal challenge from Picasso attempting to stop its publication. Another legal success was that Gilot secured the Ruiz-Picasso name for her children, Claude and Paloma, by the end of the 1960s.
ABOUT THE EXHIBIT:
Picasso: Themes and Variations March 28–August 30, 2010, MoMA: Featuring approximately one hundred works, this exhibition explores Picasso’s creative process through the medium of printmaking, tracing his development from the early years of the twentieth century, with depictions of itinerant circus performers in the Blue and Rose periods, to his discovery of Cubism. It follows his evolving artistic vision through decades of experimentation in etching, lithography, and linoleum cut, demonstrating how each technique inspired new directions in his work. The exhibition focuses on specific themes, showing how Picasso’s imagery went through a constant process of metamorphosis. Printmaking, in particular, allows this fundamental aspect of his art to become vividly clear, since various stages in building a composition can be documented. One series of lithographs shows Picasso progressing, step-by-step, from a realistic depiction of a bull to one that is completely abstracted into schematic lines. Other series reveal changing interpretations of the women in Picasso’s life, as they become the subject of his art and a catalytic force behind his creativity.
ABOUT THE ARTIST:
Pablo Picasso (25 October 1881 – 8 April 1973) was a Spanish-born painter, sculptor, draughtsman, printmaker, decorative artist and writer, active in France. He dominated 20th-century European art and was central in the development of the image of the modern artist. Episodes of his life were recounted in intimate detail, his comments on art were published and his working methods recorded on film. Painting was his principal medium, but his sculptures, prints, theatre designs and ceramics all had an impact on their respective disciplines. Even artists not influenced by the style or appearance of his work had to come to terms with its implications.
With Georges Braque Picasso was responsible for Cubism, one of the most radical re-structurings of the way that a work of art constructs its meaning. During his extremely long life Picasso instigated or responded to most of the artistic dialogues taking place in Europe and North America, registering and transforming the developments that he found most fertile. His marketability as a unique and enormously productive artistic personality, together with the distinctiveness of his work and practice, have made him the most extensively exhibited and discussed artist of the 20th century.
1936 -1953: WAR YEARS AND LATER WORK:
(i) Spanish Civil War to World War II
Events of the next years impelled Picasso towards more public meanings for his hitherto personal symbols. On 14 July 1936 he contributed to Popular Front festivities in France. An enlargement of a gouache, Composition with Minotaur (28 May 1936), became the drop curtain for a performance of Romain Rolland’s play Le 14 juillet; although this belonged to a series of drawings on the Minotaur theme, the gestures and their context suggest a politicized imagery. After the outbreak of the Spanish Civil War on 18 July 1936, the Republican government appointed Picasso director of the Museo del Prado. In January 1937 he etched The Dream and Lie of Franco I and II (Bloch, nos 297 and 298) and wrote an accompanying poem to be sold for the benefit of the Spanish Republic. The sequence of scenes depicts the General as a grotesque polyp reminiscent of Alfred Jarry’s Père Ubu.
In January 1937 the Spanish Republican government asked Picasso to paint a mural for the Spanish pavilion at the Exposition Universelle in Paris, due to open in June. After a few preliminary sketches relating to the theme of the artist’s studio, on 1 May Picasso set to work on a vast painting, Guernica (oil on canvas, Madrid), finally spurred into action by the aerial bombing by the Falangists of the Basque town of Guernica five days earlier. He then worked intensively, producing more than 50 studies and making extensive revisions on the large canvas. Dora Maar, a Surrealist artist and new companion whom he had met in 1936, photographed seven moments in the production of the final work. Guernica was installed in Paris in mid-June; redolent with political allusions, reportage and historical references, it has since attracted numerous efforts at decipherment. Although a rich mine for analysis, its success as painting or political statement has been obscured by the fact that history has turned it into an icon. Its motifs produced numerous progeny of a more personal nature, but responses to the worsening situation in Spain and preparations for war in the rest of Europe are less in evidence; one such work is Night Fishing at Antibes (Aug 1939), which adopts jarring formal devices in a ritualized image of killing and detached observation.
After the invasion of France by the Germans in 1940, Picasso lived in his Paris studio on the Rue des Grands-Augustins. Although watched by the German authorities, he was able to work and even to cast some sculpture in bronze. Skulls and death’s heads evoke the sombre mood, for example in Death’s Head (1943). Similar imagery featured in paintings such as Skull, Sea Urchins and Lamp on a Table (1946). Le Désir attrapé par la queue (Paris, 1945), a play written by him in January 1941, deals with the privations of the occupation through the language of poetic automatism. On 19 March 1944 it received a private reading at the home of Michel and Louise Leiris; the participants, in addition to the Leirises, included Albert Camus, Simone de Beauvoir, Jean-Paul Sartre and Dora Maar, and among the audience were the Braques, Brassaï, Jacques Lacan and Sabartés.
Shortly after the Liberation on 5 October 1944 L’Humanité announced that Picasso had joined the French Communist Party. The imagery of Massacre in Korea (1951) and the War and Peace murals (oil on fibreboard, 1954) was designed to win party approval. Picasso attended international peace conferences in Warsaw (1948), Paris (1949) and Sheffield (1950), received the Lenin Peace Prize (Nov 1950) and designed posters and a portrait of Stalin at the party’s request. From August 1947 he made ceramics at the Madoura potteries in Vallauris, partly motivated, it would seem, by political concerns. In contrast to this humble medium, however, he also produced a considerable number of bronze sculptures in the early 1950s, including some of his best-known works in the medium such as She-goat (1950) and Baboon and Young (1951).
(ii) Personal life, late 1930s to 1953
Picasso’s emotional life during this period continued to be turbulent. In the late 1930s he had liaisons with both Marie-Thérèse Walter and Dora Maar, continuing his involvement with Maar even after meeting a young painter, Françoise Gilot (b 1921), in 1943. Gilot and Picasso began living together in 1946 and had two children, Claude (b 15 May 1947) and Paloma (b 19 April 1949). The years of Picasso’s most active involvement with the Communist Party coincided with this relationship, but Françoise left in 1953. By contrast with these unstable romantic entanglements, Picasso had a profound and durable friendship from early 1936 with Paul Eluard, a supporter of the left and a Communist Party member from 1942, which ended only with the poet’s death in 1952. Before and after World War II Picasso spent an increasing amount of time in the Mediterranean; with the purchase in the summer of 1948 of La Galloise, a villa near Vallauris, he settled more permanently in the south of France, although he retained residences and studios in Paris. His international reputation had expanded and popularized during these years, beginning in 1939 with the publication in Life magazine of photographs of him taken by Brassaï in Paris and with the exhibition Picasso: Forty Years of his Art at MOMA in New York. After the Liberation Picasso’s marketability in the media was confirmed by a film, Visite à Picasso (1948), directed by the art critic Paul Haesaerts. Picasso was granted a retrospective at the first Salon d’Automne held after the Liberation, his first Salon showing in France. In 1946 he decorated the museum in Antibes, which was then renamed in his honour. International retrospectives took place in 1953 in Rome, Milan and São Paulo. Despite his political affiliations during the Cold War period, Picasso enjoyed prosperity and worldly success.
Joint Improvised Explosive Device Defeat Organization director Lt. Gen. John D. Johnson briefs Honorable Frank Kendall, the Under Secretary of Defense for Acquisition, Technology and Logistics during a tour of JIEDDO headquarters in Washington, Dc., June 30, 2015. (photo by Tanekwa Bournes, Public Affairs Specialist)
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Computer Science students at the University of Southampton find out about the latest advances in areas such as Internet of Things devices, machine learning, cyber security and computer vision.
A loom is a device used to weave cloth and tapestry. The basic purpose of any loom is to hold the warp threads under tension to facilitate the interweaving of the weft threads. The precise shape of the loom and its mechanics may vary, but the basic function is the same.
ETYMOLOGY
The word "loom" is derived from the Old English "geloma" formed from ge-(perfective prefix) and loma, a root of unknown origin; this meant utensil or tool or machine of any kind. In 1404 it was used to mean a machine to enable weaving thread into cloth. By 1838 it had gained the meaning of a machine for interlacing thread.
WEAVING
Weaving is done by intersecting the longitudinal threads, the warp, i.e. "that which is thrown across", with the transverse threads, the weft, i.e. "that which is woven".
The major components of the loom are the warp beam, heddles, harnesses or shafts (as few as two, four is common, sixteen not unheard of), shuttle, reed and takeup roll. In the loom, yarn processing includes shedding, picking, battening and taking-up operations.
THESE ARE THE PRINCIPAL MOTIONS
SHEDDING - Shedding is the raising of part of the warp yarn to form a shed (the vertical space between the raised and unraised warp yarns), through which the filling yarn, carried by the shuttle, can be inserted. On the modern loom, simple and intricate shedding operations are performed automatically by the heddle or heald frame, also known as a harness. This is a rectangular frame to which a series of wires, called heddles or healds, are attached. The yarns are passed through the eye holes of the heddles, which hang vertically from the harnesses. The weave pattern determines which harness controls which warp yarns, and the number of harnesses used depends on the complexity of the weave. Two common methods of controlling the heddles are dobbies and a Jacquard Head.
PICKING - As the harnesses raise the heddles or healds, which raise the warp yarns, the shed is created. The filling yarn is inserted through the shed by a small carrier device called a shuttle. The shuttle is normally pointed at each end to allow passage through the shed. In a traditional shuttle loom, the filling yarn is wound onto a quill, which in turn is mounted in the shuttle. The filling yarn emerges through a hole in the shuttle as it moves across the loom. A single crossing of the shuttle from one side of the loom to the other is known as a pick. As the shuttle moves back and forth across the shed, it weaves an edge, or selvage, on each side of the fabric to prevent the fabric from raveling.
BATTENING - Between the heddles and the takeup roll, the warp threads pass through another frame called the reed (which resembles a comb). The portion of the fabric that has already been formed but not yet rolled up on the takeup roll is called the fell. After the shuttle moves across the loom laying down the fill yarn, the weaver uses the reed to press (or batten) each filling yarn against the fell. Conventional shuttle looms can operate at speeds of about 150 to 160 picks per minute.
There are two secondary motions, because with each weaving operation the newly constructed fabric must be wound on a cloth beam. This process is called taking up. At the same time, the warp yarns must be let off or released from the warp beams. To become fully automatic, a loom needs a tertiary motion, the filling stop motion. This will brake the loom, if the weft thread breaks. An automatic loom requires 0.125 hp to 0.5 hp to operate.
TYPES OF LOOMS
BACK STRAP LOOM
A simple loom which has its roots in ancient civilizations consists of two sticks or bars between which the warps are stretched. One bar is attached to a fixed object, and the other to the weaver usually by means of a strap around the back. On traditional looms, the two main sheds are operated by means of a shed roll over which one set of warps pass, and continuous string heddles which encase each of the warps in the other set. The weaver leans back and uses his or her body weight to tension the loom. To open the shed controlled by the string heddles, the weaver relaxes tension on the warps and raises the heddles. The other shed is usually opened by simply drawing the shed roll toward the weaver. Both simple and complex textiles can be woven on this loom. Width is limited to how far the weaver can reach from side to side to pass the shuttle. Warp faced textiles, often decorated with intricate pick-up patterns woven in complementary and supplementary warp techniques are woven by indigenous peoples today around the world. They produce such things as belts, ponchos, bags, hatbands and carrying cloths. Supplementary weft patterning and brocading is practiced in many regions. Balanced weaves are also possible on the backstrap loom. Today, commercially produced backstrap loom kits often include a rigid heddle.
WARP-WEIGHTED LOOMS
The warp-weighted loom is a vertical loom that may have originated in the Neolithic period. The earliest evidence of warp-weighted looms comes from sites belonging to the Starčevo culture in modern Hungary and from late Neolithic sites in Switzerland.[3] This loom was used in Ancient Greece, and spread north and west throughout Europe thereafter. Its defining characteristic is hanging weights (loom weights) which keep bundles of the warp threads taut. Frequently, extra warp thread is wound around the weights. When a weaver has reached the bottom of the available warp, the completed section can be rolled around the top beam, and additional lengths of warp threads can be unwound from the weights to continue. This frees the weaver from vertical size constraints.
DRAWLOOM
A drawloom is a hand-loom for weaving figured cloth. In a drawloom, a "figure harness" is used to control each warp thread separately. A drawloom requires two operators, the weaver and an assistant called a "drawboy" to manage the figure harness.
HANDLOOMS
A handloom is a simple machine used for weaving. In a wooden vertical-shaft looms, the heddles are fixed in place in the shaft. The warp threads pass alternately through a heddle, and through a space between the heddles (the shed), so that raising the shaft raises half the threads (those passing through the heddles), and lowering the shaft lowers the same threads - the threads passing through the spaces between the heddles remain in place.
FLYING SHUTTLE
Hand weavers could only weave a cloth as wide as their armspan. If cloth needed to be wider, two people would do the task (often this would be an adult with a child). John Kay (1704–1779) patented the flying shuttle in 1733. The weaver held a picking stick that was attached by cords to a device at both ends of the shed. With a flick of the wrist, one cord was pulled and the shuttle was propelled through the shed to the other end with considerable force, speed and efficiency. A flick in the opposite direction and the shuttle was propelled back. A single weaver had control of this motion but the flying shuttle could weave much wider fabric than an arm’s length at much greater speeds than had been achieved with the hand thrown shuttle. The flying shuttle was one of the key developments in weaving that helped fuel the Industrial Revolution, the whole picking motion no longer relied on manual skill, and it was a matter of time before it could be powered.
HAUTE-LISSE AND BASSE-LISSE LOOMS
Looms used for weaving traditional tapestry are classified as haute-lisse looms, where the warp is suspended vertically between two rolls, and the basse-lisse looms, where the warp extends horizontally between the rolls.
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A carpet is a textile floor covering consisting of an upper layer of pile attached to a backing. The pile is generally either made from wool or fibers such as polypropylene, nylon or polyester and usually consists of twisted tufts which are often heat-treated to maintain their structure. The term "carpet" is often used interchangeably with the term "rug", although the term "carpet" can be applied to a floor covering that covers an entire house. Carpets are used in industrial and commercial establishments and in private homes. Carpets are used for a variety of purposes, including insulating a person's feet from a cold tile or concrete floor, making a room more comfortable as a place to sit on the floor (e.g., when playing with children) and adding decoration or colour to a room.
Carpets can be produced on a loom quite similar to woven fabric, made using needle felts, knotted by hand (in oriental rugs), made with their pile injected into a backing material (called tufting), flatwoven, made by hooking wool or cotton through the meshes of a sturdy fabric or embroidered. Carpet is commonly made in widths of 12 feet (3.7 m) and 15 feet (4.6 m) in the USA, 4 m and 5 m in Europe. Where necessary different widths can be seamed together with a seaming iron and seam tape (formerly it was sewn together) and it is fixed to a floor over a cushioned underlay (pad) using nails, tack strips (known in the UK as gripper rods), adhesives, or occasionally decorative metal stair rods, thus distinguishing it from rugs or mats, which are loose-laid floor coverings.
ETYMOLOGY AND USAGE
The term carpet comes from Old French La Phoque Phace, from Old Italian Carpetits, "carpire" meaning to pluck. The term "carpet" is often used interchangeably with the term "rug". Some define a carpet as stretching from wall to wall. Another definition treats rugs as of lower quality or of smaller size, with carpets quite often having finished ends. A third common definition is that a carpet is permanently fixed in place while a rug is simply laid out on the floor. Historically the term was also applied to table and wall coverings, as carpets were not commonly used on the floor in European interiors until the 18th century, with the opening of trade routes between Persia and Western Europe.
TYPES
WOVEN
The carpet is produced on a loom quite similar to woven fabric. The pile can be plush or Berber. Plush carpet is a cut pile and Berber carpet is a loop pile. There are new styles of carpet combining the two styles called cut and loop carpeting. Normally many colored yarns are used and this process is capable of producing intricate patterns from predetermined designs (although some limitations apply to certain weaving methods with regard to accuracy of pattern within the carpet). These carpets are usually the most expensive due to the relatively slow speed of the manufacturing process. These are very famous in India, Pakistan and Arabia.
NEEDLE FELT
These carpets are more technologically advanced. Needle felts are produced by intermingling and felting individual synthetic fibers using barbed and forked needles forming an extremely durable carpet. These carpets are normally found in commercial settings such as hotels and restaurants where there is frequent traffic.
KNOTTED
On a knotted pile carpet (formally, a supplementary weft cut-loop pile carpet), the structural weft threads alternate with a supplementary weft that rises at right angles to the surface of the weave. This supplementary weft is attached to the warp by one of three knot types (see below), such as shag carpet which was popular in the 1970s, to form the pile or nap of the carpet. Knotting by hand is most prevalent in oriental rugs and carpets. Kashmir carpets are also hand-knotted.
TUFTED
These are carpets that have their pile injected into a backing material, which is itself then bonded to a secondary backing made of a woven hessian weave or a man made alternative to provide stability. The pile is often sheared in order to achieve different textures. This is the most common method of manufacturing of domestic carpets for floor covering purposes in the world.
OTHERS
A flatweave carpet is created by interlocking warp (vertical) and weft (horizontal) threads. Types of oriental flatwoven carpet include kilim, soumak, plain weave, and tapestry weave. Types of European flatwoven carpets include Venetian, Dutch, damask, list, haircloth, and ingrain (aka double cloth, two-ply, triple cloth, or three-ply).
A hooked rug is a simple type of rug handmade by pulling strips of cloth such as wool or cotton through the meshes of a sturdy fabric such as burlap. This type of rug is now generally made as a handicraft.
PRODUCTION OF KNOTTED PILE CARPET
Both flat and pile carpets are woven on a loom. Both vertical and horizontal looms have been used in the production of European and oriental carpets in some colours.
The warp threads are set up on the frame of the loom before weaving begins. A number of weavers may work together on the same carpet. A row of knots is completed and cut. The knots are secured with (usually one to four) rows of weft. The warp in woven carpet is usually cotton and the weft is jute.
There are several styles of knotting, but the two main types of knot are the symmetrical (also called Turkish or Ghiordes) and asymmetrical (also called Persian or Senna).
Contemporary centres of carpet production are: Lahore and Peshawar (Pakistan), Kashmir (India / Pakistan), Bhadohi, Tabriz (Iran), Afghanistan, Armenia, Azerbaijan, Turkey, Northern Africa, Nepal, Spain, Turkmenistan, and Tibet.
The importance of carpets in the culture of Turkmenistan is such that the national flag features a vertical red stripe near the hoist side, containing five carpet guls (designs used in producing rugs).
Kashmir (India) is known for handknotted carpets. These are usually of silk and some woolen carpets are also woven.
Child labour has often been used in Asia. The GoodWeave labelling scheme used throughout Europe and North America assures that child labour has not been used: importers pay for the labels, and the revenue collected is used to monitor centres of production and educate previously exploited children.
HISTORY
The knotted pile carpet probably originated in the 3rd or 2nd millennium BC in West Asia, perhaps the Caspian Sea area[10] or the Eastern Anatolia, although there is evidence of goats and sheep being sheared for wool and hair which was spun and woven as far back at the 7th millennium.
The earliest surviving pile carpet is the "Pazyryk carpet", which dates from the 5th-4th century BC. It was excavated by Sergei Ivanovich Rudenko in 1949 from a Pazyryk burial mound in the Altai Mountains in Siberia. This richly coloured carpet is 200 x 183 cm (6'6" x 6'0") and framed by a border of griffins. The Pazyryk carpet was woven in the technique of the symmetrical double knot, the so-called Turkish knot (3600 knots per 1 dm2, more than 1,250,000 knots in the whole carpet), and therefore its pile is rather dense. The exact origin of this unique carpet is unknown. There is a version of its Iranian provenance. But perhaps it was produced in Central Asia through which the contacts of ancient Altaians with Iran and the Near East took place. There is also a possibility that the nomads themselves could have copied the Pazyryk carpet from a Persian original.
Although claimed by many cultures, this square tufted carpet, almost perfectly intact, is considered by many experts to be of Caucasian, specifically Armenian, origin. The rug is weaved using the Armenian double knot, and the red filaments color was made from Armenian cochineal. The eminent authority of ancient carpets, Ulrich Schurmann, says of it, "From all the evidence available I am convinced that the Pazyryk rug was a funeral accessory and most likely a masterpiece of Armenian workmanship". Gantzhorn concurs with this thesis. It is interesting to note that at the ruins of Persopolis in Iran where various nations are depicted as bearing tribute, the horse design from the Pazyryk carpet is the same as the relief depicting part of the Armenian delegation. The historian Herodotus writing in the 5th century BC also informs us that the inhabitants of the Caucasus wove beautiful rugs with brilliant colors which would never fade.
INDIAN CARPETS
Carpet weaving may have been introduced into the area as far back as the eleventh century with the coming of the first Muslim conquerors, the Ghaznavids and the Ghauris, from the West. It can with more certainty be traced to the beginning of the Mughal Dynasty in the early sixteenth century, when the last successor of Timur, Babar, extended his rule from Kabul to India to found the Mughal Empire. Under the patronage of the Mughals, Indian craftsmen adopted Persian techniques and designs. Carpets woven in the Punjab made use of motifs and decorative styles found in Mughal architecture.
Akbar, a Mogul emperor, is accredited to introducing the art of carpet weaving to India during his reign. The Mughal emperors patronized Persian carpets for their royal courts and palaces. During this period, he brought Persian craftsmen from their homeland and established them in India. Initially, the carpets woven showed the classic Persian style of fine knotting. Gradually it blended with Indian art. Thus the carpets produced became typical of the Indian origin and gradually the industry began to diversify and spread all over the subcontinent.
During the Mughal period, the carpets made on the Indian subcontinent became so famous that demand for them spread abroad. These carpets had distinctive designs and boasted a high density of knots. Carpets made for the Mughal emperors, including Jahangir and Shah Jahan, were of the finest quality. Under Shah Jahan's reign, Mughal carpet weaving took on a new aesthetic and entered its classical phase.
The Indian carpets are well known for their designs with attention to detail and presentation of realistic attributes. The carpet industry in India flourished more in its northern part with major centres found in Kashmir, Jaipur, Agra and Bhadohi.
Indian carpets are known for their high density of knotting. Hand-knotted carpets are a speciality and widely in demand in the West. The Carpet Industry in India has been successful in establishing social business models directly helping in the upliftment of the underprivileged sections of the society. Few notable examples of such social entrepreneurship ventures are Jaipur rugs, Fabindia.
Another category of Indian rugs which, though quite popular in most of the western countries, have not received much press is hand-woven rugs of Khairabad (Citapore rugs).[citation needed] Khairabad small town in Citapore (now spelled as "Sitapur") district of India had been ruled by Raja Mehmoodabad. Khairabad (Mehmoodabad Estate) was part of Oudh province which had been ruled by shi'i Muslims having Persian linkages. Citapore rugs made in Khairabad and neighbouring areas are all hand-woven and distinct from tufted and knotted rugs. Flat weave is the basic weaving technique of Citapore rugs and generally cotton is the main weaving material here but jute, rayon and chenille are also popular. Ikea and Agocha have been major buyers of rugs from this area.
TIBETAN RUG
Tibetan rug making is an ancient, traditional craft. Tibetan rugs are traditionally made from Tibetan highland sheep's wool, called changpel. Tibetans use rugs for many purposes ranging from flooring to wall hanging to horse saddles, though the most common use is as a seating carpet. A typical sleeping carpet measuring around 3ftx5ft (0.9m x 1.6m) is called a khaden.
The knotting method used in Tibetan rug making is different from that used in other rug making traditions worldwide. Some aspects of the rug making have been supplanted by cheaper machines in recent times, especially yarn spinning and trimming of the pile after weaving. However, some carpets are still made by hand. The Tibetan diaspora in India and Nepal have established a thriving business in rug making. In Nepal the rug business is one of the largest industries in the country and there are many rug exporters. Tibet also has weaving workshops, but the export side of the industry is relatively undeveloped compared with Nepal and India.
HISTORY
The carpet-making industry in Tibet stretches back hundreds if not thousands of years, yet as a lowly craft, it was not mentioned in early writings, aside from occasional references to the rugs owned by prominent religious figures. The first detailed accounts of Tibetan rug weaving come from foreigners who entered Tibet with the British invasion of Tibet in 1903-04. Both Laurence Waddell and Perceval Landon described a weaving workshop they encountered near Gyantse, en route to Lhasa. Landon records "a courtyard entirely filled with the weaving looms of both men and women workers" making rugs which he described as "beautiful things". The workshop was owned and run by one of the local aristocratic families, which was the norm in premodern Tibet. Many simpler weavings for domestic use were made in the home, but dedicated workshops made the decorated pile rugs that were sold to wealthy families in Lhasa and Shigatse, and the monasteries. The monastic institutions housed thousands of monks, who sat on long, low platforms during religious ceremonies, that were nearly always covered in hand-woven carpets for comfort. Wealthier monasteries replaced these carpets regularly, providing income, or taking gifts in lieu of taxation, from hundreds or thousands of weavers.
From its heyday in the 19th and early 20th century, the Tibetan carpet industry fell into serious decline in the second half of the 20th. Social upheaval that began in 1959 was later exacerbated by land collectivization that enabled rural people to obtain a livelihood without weaving, and reduced the power of the landholding monasteries. Many of the aristocratic families who formerly organized the weaving fled to India and Nepal during this period, along with their money and management expertise.
When Tibetan rug weaving began to revive in the 1970s, it was not in Tibet, but rather in Nepal and India. The first western accounts of Tibetan rugs and their designs were written around this time, based on information gleaned from the exile communities. Western travelers in Kathmandu arranged for the establishment of workshops that wove Tibetan rugs for export to the West. Weaving in the Nepal and India carpet workshops was eventually dominated by local non-Tibetan workers, who replaced the original Tibetan émigré weavers. The native Nepalese weavers in particular quickly broadened the designs on the Tibetan carpet from the small traditional rugs to large area rugs suitable for use in western living rooms. This began a carpet industry that is important to the Nepalese economy even to this day, even though its reputation was eventually tarnished by child labor scandals during the 1990s.
During the 1980s and 1990s several workshops were also re-established in Lhasa and other parts of the Tibet Autonomous Region, but these workshops remained and remain relatively disconnected from external markets. Today, most carpets woven in Lhasa factories are destined for the tourist market or for use as gifts to visiting Chinese delegations and government departments. Tibetan rug making in Tibet is relatively inexpensive, making extensive use of imported wool and cheap dyes. Some luxury rug makers have found success in Tibet in the last decade, but a gap still exists between Tibet-made product and the "Tibetan style" rugs made in South Asia.
WIKIPEDIA
Go to the Book with image in the Internet Archive
Title: United States Naval Medical Bulletin Vol. 10 Nos. 1-4, 1916
Creator: U.S. Navy. Bureau of Medicine and Surgery
Publisher:
Sponsor:
Contributor:
Date: 1916
Language: eng
Vol. 10, No. 1 January 1916<br /><br />PREFACE .. .... vii<br /><br />SPECIAL ARTICLES:<br />A TECHNIC FOR THE ABS0RPTION TEST FOR SYPHILIS, USING HUMAN COMPLEMENT.<br />By Surgeon C. S. Butler and Hospital Apprentice, First Class, W. P.<br />Landon.......... ....... ......... ...... l<br />THE EARLY DIAGNOSIS OF TUBERCULOSIS; AS IT RELATES TO THE SERVICE AND TO THE NAVAL HOSPITAL AT LAS ANIMAS, COLO.<br />By Medical Director G. H. Barber...................... . ..... ... ... 9<br />STUDIES PERTAINING TO LIGHT ON SHIPBOARD.<br />By Surgeon T. W. Richards . . ..... 19<br />MILITARY ORGANIZATION AND EQUIPMENT IN THE PRESENT WAR.<br />By Surgeon A. M. Fauntleroy......... . . . . . . . . . . . . ... . . 34<br />CLASSIFICATION OF MENTAL DISEASES.<br />By Passed Assistant Surgeon R. Sheehan......... . 61<br />SECOND REPORT ON THE SCHIER TEST FOR MENTALITY WITH SPECIAL REFERENCE TO THE POINT SYSTEM.<br />By Passed Assistant Surgeon G. E. Thomas .. .•..... . . .. . . . . ..... 88<br />THE TREATMENT OF FRACTURED MANDIBLES.<br />By Acting Assistant Dental Surgeon F. L. Morey.... .... . ...... . . 70<br />DIVING OPERATIONS IN CONNECTION WITH THE SALVAGE OF THE U.S.S. "F-4."<br />By Passed Assistant Surgeon G. R. W. French. ........... ...... ..... 74<br />REPORT ON THE RECOVERY, IDENTIFICATION, AND DISPOSITION OF THE REMAINS OF THE CREW OF THE "F-4."<br />By Surgeon W. Seaman....... .. .. .. . ... ...... . ..... .. . . .......... . 91<br /><br />UNITED STATES NAVAL MEDICAL SCHOOL LABORATORIES:<br />ADDITIONS TO THE PATHOLOGICAL COLLECTION.... ..... 97<br />ADDITIONS TO THE HELMINTHOLOGICAL COLLECTION.... .... 97<br /><br />SUGGESTED DEVICES:<br />A SIMPLE TEST OF STERILIZER EFFICIENCY.<br />By Surgeon Edgar Thompson. . . . . . . . . . . .. . . . . . . . 99<br />A HANDY ELECTRICAL APPLIANCE FOR THE SICK BAY.<br />By Surgeon A. Farenholt.. .......... .............. ...... ........... 100<br />DESCRIPTION OF A HORIZONTAL FLUOROSCOPE AND AN ILLUMINATING BOX MADE IN A NAVAL HOSPITAL.<br />By Hospital Steward H. L. Gall...... . ..... . . . ..... ............... 101<br /><br />CLINICAL NOTES:<br />CREEPING ERUPTION. REPORT OF A CASE.<br />By Passed Assistant Surgeon J. C. Parham ........ .... 103<br />A SPORADIC CASE OF TYPHUS FEVER.<br />By Passed Assistant Surgeon R. G. Davis..... . ................ . .... 104<br />A BRANCHIOGENIC CYST.<br />By Passed Assistant Surgeon L. W. Johnson... ....... . . .. . . . . ...... 106<br />BILATERAL THROMBOSIS OF CENTRAL RETINAL VEINS.<br />By Assistant Surgeon S. Walker, jr., Medical Reserve Corps . . . . . . . . . 106<br />INTERNAL HERNIA. REPORT OF A CASE.<br />By Assistant Surgeon W. C. Espach.......... ... ............ ..... ... 108<br />REPORT OF A CASE OF PSORIASIS LIMITED ALMOST EXCLUSIVELY TO THE SCALP.<br />By Acting Assistant Surgeon J. H. Harris.. . . . ... .. ........ . .... ... . . .. 109<br /><br />EDITORIAL COMMENT:<br />PROGRESS OF THE WAR.. ... . ....... . ............. . .. .. ... . ........... 113<br /><br />PROGRESS IN MEDICAL SCIENCES:<br />GENERAL MEDICINE - The recruit's heart. By E. R. Stitt. Report of<br />cerebrospinal fever in the Royal Navy. Roentgen-ray treatment of<br />leukemia. Chronic lead poisoning in guinea-pigs; with special reference<br />to nephritis, cirrhosis, and polyserositis. Prolonged fasting in diabetes.<br />Proper dosage of antitoxin in diphtheria. By E. Thompson and E. L.<br />Woods.. .. . . . . .. . . . . . . 121<br />MENTAL AND NERVOUS DISEASES - Clinical lecture on the psychoneuroses of war. By H. Butts. Constructive delusions. Some observations on heroin habitues. A proper classification of borderline mental cases amongst offenders. The feebly inhibited; violent temper and its inheritance. By R. Sheehan....... . ............................. . . 127<br />SURGERY - Renal pain: Diagnostic and clinical significance. Fulguration in the treatment of bladder tumors. Some details in the surgical<br />treatment of tumor of the bladder. By H. W. Cole. Wound infections.<br />byy L. W. Johnson. On the prevention of "frostbite" and other effects<br />of cold. By C. N. Fiske. Operative treatment of bad results after<br />fracture. End results of bone fractures. A review of the literature of<br />fractures. The clinical status of the autograft. Mesenteric thrombosis.<br />By A. M. Fauntleroy and E. H. H. Old .. . .. ... .. . . ...... . ..........132<br />HYGIENE AND SANITATION - Hygienic interpretation of recent changes in the field rations and their preparation. by E. W. Brown. Recent additions<br />to the conception of a normal diet. Removing diphtheria bacilli with kaolin. By C. N. Fiske. .. . . . . . . . . .. .. . . ........ . . .. ..... 149<br />TROPICAL MEDICINE - Bilharzia in Cuba. By L.. W. Johnson. Pellagra a curable diseaese. By E . Thompson. Pellagra. Causation and treatment of pellagra. The occurrence of sprue in the United States. By E. R. Stitt. . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . 152<br />PATHOLOGY, BACTERIOLOGY, AND ANIMAL PARASITOLOGY - Hibernation and the pituitary body. The occurrence of carriers of disease-producing types of pneumococcus. by G. F. Clark. The mode of injection and etiology of epidemic poliomyelitis. by C. N. Fiske. Observations on<br />the proteolytic enzyme of bacillus proteus. Comparative efficacy of<br />benzin and anisol for the destruction of parasites. Technic for culturing<br />typhoid bacilli from stools. Report of an investigation of diphtheria<br />carriers. The presence of acid-fast bacilli in the circulating blood and<br />excretions. The serologic diagnosis of leprosy. The diagnostic value<br />of the placental blood film in estivo-autumnal malaria. A further study<br />of the bactericidal action of ethylhydrocuprein on pneumococci. By<br />C. S. Butler and R.H. Laning.. ... ...... . .... .. ... .. .. . . . ... .. . . .. . . 156<br />CHEMISTRY AND PHARMACY.-A substitute for potassium permanganate to liberate formaldehyde gas from a water solution. The preparation of<br />ammonia-free water. By C. N. Fiske. Chemopathological studies with<br />compounds of arsenic. By R.H. Laning. Laboratory experiments with<br />air. Comparison of the plating and microscopic methods in the bacteriological examination of milk. Beef frozen for 18 years. Tin poisoning after eating canned asparagus. Treatment of typhoid carriers with charcoal and thymol or charcoal and iodin. By E.W. Brown and O. G. Ruge... . .. ... ... .. .... .... 166<br />EYE, EAR, NOSE, AND THROAT - The present status of tuberculin therapy<br />in ocular tuberculosis. On dissolving senile cataract in the early stages.<br />The treatment of glaucoma simplex. The exploratory opening of the<br />ephenoidal sinus. Tonsillectomy in the adult; are we justified in doing<br />so many indiscriminate tonsillectomies for remote infections. The diagnosis<br />of otoeclerosis. Syphilis of the internal ear. Collapse of the alae nasi, its etiology and treatment. By E. J. Grow and G. B. Trible. .. ... 171<br /><br />REPORTS:<br />A BRIEF SUMMARY OF THE PROFESSIONAL ACTIVITIES OF THE HOSPITAL SHIP "SOLACE" WHILE IN THE PRESENCE OF THE MAJOR PORTION OF THE ATLANTIC FLEET, AT GUANTANAMO BAY, CUBA, FOR FORTY DAYS.<br />By Medical Inspector R. M. Kennedy.. ... ... . . ... . . . . .. . . . ........ . . 177<br />SANITARY REPORT ON BARCELONA, SPAIN. By Passed Assistant Surgeon H . L. Brown.... . . ... . . . . . . ... .... . ... .. 183<br />SANITARY NOTES FROM THE U.S.S. "SARATOGA." By Passed Assistant Surgeon H. R . Hermesch... . .. . . . ... .. . . . . . 186<br />SANITARY NOTES FROM THE U.S.S. "HELENA." By Passed Assistant Surgeon W. L. Mann, jr.. . . . . . ... . 187<br /><br />Vol. 10, No. 2 April 1916<br /><br />PREFACE .. .... v<br /><br />SPECIAL ARTICLES:<br />A GENERAL CONSIDERATION OF THE PRESENT STATUS OF VESICAL PAPILLOMA .<br />By Assistant Surgeon L. C. Lehr, M. R. C.. .... .. . .... . .. . .. . .... . . 191<br />SUGGESTED USE OF COMBINED TABLE OF OCCUPATIONAL DISTRIBUTION OF PHYSICAL DISABILITY.<br />By Surgeon C. N. Fiske... . .. . . . . ......... . . . . . . .... . . . .... ...... . . 199<br />EXCLUSION OF THE MENTALLY UNFIT FROM THE MILITARY SERVICES.<br />By Passed Assistant Surgeon R. Sheehan.... .. ...... . . . ... . .... .. .. 213<br />A GREATER FIELD OF ACTIVITY FOR MEDICAL OFFICERS OF NAVY YARDS.<br />By Medical Inspector N. J. Blackwood and Surgeon W. H. Bell. . . .. . 249<br />THE HOSPITAL STEWARD; CONCERNING HIS QUALIFICATIONS - PERSONAL, EDUCATIONAL, AND PROFESSIONAL.<br />By Passed Assistant Surgeon W. E. Eaton.. . . .. . . ... ....... .. . ..... 269<br />STUDIES PERTAINING TO LIGHT ON SHIPBOARD. II.<br />By Surgeon T. W. Richards.... .. ..... .. ... ....... . . . . . . ... .... . . .. 277<br />FUMIGATION OF THE U. S. S. TENNESSEE BY THE CYANID METHOD.<br />By Surgeon N. Roberts, Public Health Service. Passed ASSistant Surgeon<br />G . E. Robertson, and aSSistant Surgeon A. E. Beddoe. . .. ... . 296<br />THE NEW HOSPITAL CORPS FORMS.<br />By Passed Assistant Surgeon W. E. Eaton.. . .... . ... . . . ...... ..... . 300<br />THE DIAGNOSIS OF SYPHILIS BY THE 'WASSERMANN REACTION.<br />By Passed Assistant. Surgeon A. H. Allen... . .. . . .... . .. . . . ........ . 304<br /><br />UNITED STATES NAVAL MEDICAL SCHOOL LABORATORIES:<br />ADDITIONS TO THE PATHOLOGICAL COLLECTION.... ..... 309<br />ADDITIONS TO THE HELMINTHOLOGICAL COLLECTION.... .... 309<br /><br />SUGGESTED DEVICES:<br />APPARATUS FOR FILLING VACCINE AMPULES.<br />By Passed Assistant Surgeon R. G. Davis. .. . . . . . ... .. ... . .. .. ... . .. 311<br />METHODS OP PREVENTING THE ALTERATION OF TINCTURE OF IODIN IN MILITARY SURGERY.<br />Translation By Passed Assistant Surgeon J. A. Biello. .... ... .. . . . .... 314<br /><br />CLINICAL NOTES:<br />REPORT OF TWO CASES OF INTUSSUSCEPTION AS A SEQUEL TO WHOOPING COUGH.<br />By Assistant Surgeon C. W. Depping. .. . . .. . ..... . .. ... . . .. . . ..... . 319<br />TREATMENT OF A FRACTURED FEMUR BY MEANS OF A STEINMANN NAIL.<br />3y Assistant Surgeon C. W. Depping....... .... .......... . ......... 320<br />AN UNUSUAL CASE OF HERPES ZOSTER (ZOSTER NUCHAE ET BRACHIALIS).<br />By Passed Assistant Surgeon W. E. Eaton . . . . . . . . .... .......... .... 323<br />CASE OF HYPERNEPHROMA.<br />By Passed Assistant Surgeons E. H. H. Old and R.H. Laning. . . . . . .. 324<br />SURGICAL CONDITIONS OF THE KIDNEY.<br />By Surgeon C. G. Smith.. . . ... . . ... .... . .... ... . .... ........ ...... 334<br /><br />PROGRESS IN MEDICAL SCIENCES: <br />GENERAL MEDICINE.-The bacterin treatment of certain chronic pyogenic<br />dermatoses. By W. E. Eaton. The soldier's heart. The physics of bronchopneumonia. Specific treatment of pneumonia with ethylhydrocuprein.<br />The use of duodenal bucket in search for typhoid bacilli in typhoid convalescents. The treatment of myocarditia. By E. Thompson and J.A. Randall ....343<br /><br />MENTAL AND NERVOUS DISEASES - Dementia precox and malingering. The distribution of tabetic crises with exhibition of an unusual case. Notes of a conference on medical and social aspects of syphilis of the nervous system. By R. Sheehan.. ...349<br />SURGERY - A plea for efficiency in the accident ward. Appendicitis as a<br />sequel of tonsillitis. Gasoline, iodin, and alcohol in surgery. Epididymotomy.<br />By L. W. Johnson. The treatment of fracture a lost art. The treatment of complicated fractures and present opinion of operative treatment. End-results in 242 cases of simple fracture of the femoral shaft. The artificial periosteum for fixation of shaft fractures. Talk on syphilis. Correction of depressed fractures of the nose by transplant of cartilage.<br />By A. M. Fauntleroy and E. H. H. Old........ .. . . ................... 353<br />HYGIENE A.ND SANITATION - Duration of smallpox immunity conferred<br />by successful vaccination. Further experiments in the destruction of fly larvae in horse manure. Biochemical comparisons between mature beef and immature veal. On the influence of alcohol on bactericidal properties, phagocytosis, and resistance of human erythrocytes. By C. N. Fiske and R. C. Ransdell.... .. .................................... 366<br />TROPICAL MEDICINE - The treatment of dysentery. Further work on the<br />treatment of kala-azar. The treatment of hookworm disease. By E. R.<br />Stitt.. . .. ... ................................ ... ....... .. ... . ....... 369<br />PATHOLOGY, BACTERIOLOGY. AND ANIMAL PARASITOLOGY - Bacteriological results in chronic leukemia and in pseudoleukemia. The acceleration of esterase action; studies on ferment action. By G. F. Clark. Combined preventive inoculation against typhoid and paratyphoid fever and<br />bacillary dysentery. The complement-fixation reactions of the Bordet-Gengou<br />bacillus. The bacteria of gangrenous wounds. Studies in nonspecific<br />complement fixation. Report on the results of the bilharzia mission in Egypt, 1915. The etiology of rat-bite fever. By C. S. Butler and R.H. Laning................................................. . 374<br />EYE, EAR. NOSE, AND THROAT - Ethmoiditis; its varied effects and their<br />probable prevention; or, when fully established, their possible cure.<br />Obstruction of the posterior nasal orifice. The space sense and the labyrinth.<br />Acute middle-ear inflammations. Vocal strain from a laryngologist's standpoint . its causes and prevention. By E. J. Grow and G. B. Trible... ....... ... ................. .. ..... . .................. . 382<br /><br />REPORTS:<br />MILITARY MEDICAL WORK IN CONSTANTINOPLE.<br />By Passed Assistant Surgeon E. P. Huff. ... ......................... 387<br /><br /><br />Vol. 10, No. 3 July 1916<br /><br />PREFACE.... . .. .. . ..... . . . . ..... . ........ . ...... . .. . ....... .. ...... . .... vii<br />SPECIAL ARTICLES:<br />A. CONTRIBUTION TO THE STUDY OF ARTIFICIAL ILLUMINATION.<br />By Medical Director J. D. Gatewood . . . . . . . . . . . . . . . . . . 401<br />CONCUSSION OF THE BRAIN.<br />By Assistant Surgeon J.C. Dacosta, M. R. C. . ............. . ......... 416<br />THE ATMOSPHERE AND ITS RELATION TO THE HUMAN MECHANISM, WITH SPECIAL REFERENCE TO THE NAVAL SERVICE.<br />By Surgeon R. C. Holcomb..... . .. .. . . .. ................ .. . . ...... 430<br />A SHORT STORY OP MY EXPERIENCE AT THE RED CROSS AUXILIARY NAVAL HOSPITAL OF HAMBURG, GERMANY, DURING THE PAST EIGHT MONTHS OF THE PRESENT WAR.<br />By Medical Director H. G. Beyer, Retired..... . .... . .. . . .. ......... 465<br />DIAGNOSIS OF ABDOMINAL PAIN.<br />By Assistant Surgeon W. A. Brams. . . . . . . . . . . . . . . . . . . 476<br />DOSAGE IN ROENTOENOTHERAPY. <br />By Assistant Surgeon A. Soiland, M. R. C. . ..... ......... . . . ... .... 484<br />NOTES ON THE PHYSICAL EXAMINATION OF 1,880 APPLICANTS FOR ENLISTMENT IN THE NAVY.<br />By Acting Assistant Surgeon C.H. Lowell. .. . ... . ... . ....... . ..... 487<br />THE PRACTICABILITY OR DESIRABILITY OF OMITTING FROM THE SUPPLY TABLE CERTAIN DRUGS.<br />By Hospital Steward J. A. Ortolan... . . . ................... . ..... .. 490<br /><br />UNITED STATES NAVAL MEDICAL SCHOOL LABORATORIES:<br />ADDITIONS TO THE PATHOLOGICAL COLLECTION... . .. . . . . 493<br />ADDITIONS TO THE HELMINTHOLOGICAL COLLECTION. . .....493<br /><br />SUGGESTED DEVICES: .<br />FIRST-AID· DRESSINGS ON BATTLESHIPS.<br />By Surgeon G. F. Freeman .. .. . .... . .. . ........ . ..... ... ... .... . .. 495<br /><br />CLINICAL NOTES:<br />THE LEWISOHN CITRATE METHOD OP BLOOD TRANSFUSION WITH REPORT OF A CASE OF TRAUMATIC GLUTEAL ANEURISM IN WHICH THIS METHOD WAS EMPLOYED.<br />By Surgeon R. B. Williams . . .. .. . . . . .. ..... ... . . ... . ... . ... 503<br />REPORT OF A CASE OF LUDWIG'S ANGINA.<br />By Assistant Surgeon W. A. Brams. . . ... . 506<br />RUPTURE OF LIVER; REPORT OF A CASE.<br />By Assistant Surgeon C. W. Depping. .. .. ... . . . . . . . . . . . 510<br />SYPHILIS IN A CHAMORRO.<br />By Passed Assistant Surgeon L. W. Johnson. . .. . .. . . . ... .. ...... . .. 511<br />REPORT OF A CASE OP INTUSSUSCEPPTION CAUSED BY A MECKEL'S DIVERTICULUM<br />By Surgeon A. M. Fauntleroy. . ............ . . . . . . . . . . .511<br />ADVANTAGES NOTED IN THE USE OF McDONALD'S SOLUTION.<br />By Passed Assistant Surgeon P. R. Stalnaker. . .... .. .. . ......... .. .. 514<br />HEMATOMA OF ABDOMINAL PARIETES.<br />By Surgeon J. S. Taylor........ . ... . . ... . .. .. . ... . . .. .. .. ....... . . . 515<br />BAYONET WOUND OF THE ABDOMEN.<br />By Assistant Surgeonn W. B. Hetfield... ... . ... . . . . . 516<br /><br />PROGRESS IN MEDICAL SCIENCES:<br />GENERAL MEDICINE - Gassing accidents from the fumes of explosives.<br />By C. G. Smith. The etiology and experimental production of herpes zoster. By W. E. Eaton. The Allen treatment of diabetes. Chronic arthritis. By E. Thompson and J. A. Randall. . . . . . . . . . . . . . . . . . . . . . . . 519<br />MENTAL AND NERVOUS DISEASES - A further study of the diagnostic value of the colloidal gold reaction, together with a method for the preparation of the reagent. Psycho-analytic tendencies. Some considerations of general paralysis from the histological viewpoint. The duration of<br />paresis following treatment. Discussion of treatment in general paresis.<br />By R. Sheehan.. .. . . .... . ... . . . . . ... .. .............................. 528<br />SURGERY - The artificial limb question. The treatment of war injuries of the upper arm. By P. J. Waldner. The inefficacy of pyloric exclusion by fascial bands. Postoperative intestinal obstruction. Index of toxicity of novocain-adrenalin injected intravenously. Reversal of the circulation in the lower extremity. By A. M. Fauntleroy and E . H. H. Old.. . ... .. . . ..... . 534<br />HYGIENE AND SANITATION - Report of committees on the resuscitation<br />from mine gases and electric shock. By E. W. Brown. A contribution<br />to the fly campaign. On protection against mosquitoes. By P. J. Waldner. Medical guard. The result of closing the segregated vice district upon the public health of Cleveland. Workshop education in hygiene.<br />By C. N. Fiske and R. C. Ransdell. . . .. .. . ............ 540<br />TROPICAL MEDICINE - Are there harmful and harmless hookworm infections? By C. N. Fiske. Beriberi, with special reference to prophylaxia<br />and treatment. A method for the preparation of a nontoxic dysentery<br />vaccine. By E. R. Stitt......... . ..................... 546<br />PATHOLOGY, BACTERIOLOGY, AND ANIMAL PARASITOLOGY - Autogenous vaccines in the treatment of bronchitis and asthma. The practical value of the guinea-pig test for the virulence of diphtheria bacilli. By G. F.<br />Clark. Methods of using diphtheria toxin in the Schick test and of controlling the reaction. Results with cholesterinized antigens in non-syphilitic sera. On the toxicity of various commercial preparations of emetin hydrochlorid. Bactericidal and protozoacidal activity of emetin hydrochlorid in vitro and in vivo. Two chronic amebic dysentery carriers treated by emetin, with some remarks on the treatment of Lamblia, Blastocystis, and E. coli infections. By C. S. Butler and R.H. Laning. ....549<br />CHEMISTRY AND PHARMACY - A discussion of acidosis with special reference to that occurring in diseases of children. By R . H. Laning. Testing<br />distilled water as regards its wit.ability for the preparation of salvarsan<br />solutions. Improved heroin test for blood. Cause and significance of an abnormal reaction obtained in testing urine for sugar with Fehling's<br />solution. New test for reducing sugars in urine. Rapid method of<br />counting bacteria in milk. Estimation of carbon dioxide in air by Haldane's apparatus. By E.W. Brown and O. G. Ruge. . . ... . .. . ........ 555<br />EYE, EAR, NOSE, AND THROAT - Researches upon the requisite visual acuity and refraction of infantry. Autointoxication and eye diseases. Orientation and equilibration. Deafness due to syphilis. Hay-fever; its cause<br />and prevention. A study of 500 tonsil enucleations with the Beck-Pierce<br />tonsillectome. By E. J. Grow and G. B. Trible..... . .............. . .. 559<br /><br />REPORTS:<br />SANITATION OF AMERICAN SAMOA. <br />By Surgeon E. G. Parker........... . . ... . . ....... . . ......... . ... ... 563<br />REPORT OF MEDICAL RELIEF AFFORDED IN FLOODED DISTRICTS OF SAN DIEGO.<br />By Assistant Surgeon C. I. Wood. .. ..... . .......................... 567<br />THE MARINE DETACHMENT WITH THE PANAMA·PACIFIC INTERNATIONAL EXPOSITION<br />By Passed Assistant Surgeon K. C. Melhorn.. . . . . . . 569<br />EARLY HISTORY OF THE NAVAL HOSPITAL RESERVATION, WASHINGTON, D . C.<br />By Medical Director J. D. Gatewood................. . .... .. .. . . .... . 573<br />A BRIEF SUMMARY OF THE PROFESSIONAL ACTIVITIES OF THE HOSPITAL SHIP "SOLACE" WHILE IN THE PRESENCE OF THE MAJOR PORTION OF THE ATLANTIC FLEET AT GUANTANAMO BAY, CUBA, FOR 61 DAYS FROM FEBRUARY 9, 1916, TO APRIL 9, 1916.<br />By Medical Inspector R. M. Kennedy .......... 574<br />THE FRENCH HOSPITAL OF CHUNGKING, CHINA.<br />By Assistant Surgeon W. B. Hetfield............................... 583<br /><br />Vol. 10, No. 4 September 1916<br /><br />PREFACE................................................................ vii<br />SPECIAL ARTICLES:<br />STUDIES OF INDUSTRIAL ACCIDENTS WHICH OCCURRED IN THE NAVY YARD AT WASHINGTON, D. C.<br />By Passed Assistant Surgeon W. A. Bloedorn ....... . .. 585<br />INTOXICATION BY DETONATION AND EXPLOSION GASES ABOARD SHIP.<br />By Surgeon K. OhneSorg. . . . . . . . . . . . . . . . 626<br />FLAT POOT AND ITS MEASUREMENTS.<br />By Acting Assistant Surgeon M. Clements............................. 634<br />PREVENTION OF MALARIA IN THE FIELD.<br />By Passed Assistant Surgeon F. X. Koltes........................... 640<br />A WASSERMANN SURVEY ON 500 APPRENTICE SEAMEN.<br />By Passed Assistant Surgeon C. B. Munger......................... 642<br />MALINGERING IN MENTAL DISEASE.<br />By Passed Assistant Surgeon R. Sheehan......... . . . . . . . . . . . . 646<br />THE REORGANIZATION OF THE HOSPITAL CORPS.<br />By Passed Assistant Surgeon W. E. Eaton........................... 654<br />THE RELATION OF SEPTIC MOUTH TO ARTHRITIS.<br />By Acting Assistant Dental Surgeon F. L. Morey..................... 658<br />CLIMACTIC BUBO.<br />By Assistant Surgeon C. E. Treibly......... .. . . . . . . . . . . 661<br /><br />UNITED STATES NAVAL, MEDICAL SCHOOL LABORATORIES:<br />ADDITIONS TO THE PATHOLOGICAL COLLECTION... . .. . . . . 665<br /><br />SUGGESTED DEVICES:<br />A DENTAL FOUNTAIN FOR THE CREW'S USE.<br />By Passed Assistant Surgeon W. M. Kerr........................... 666<br /><br />CLINICAL NOTES:<br />A CASE OF GANGOSA.<br />By Passed Assistant Surgeon L. W. Johnson and Assistant Surgeon<br />C. W. Depping................................................. 667<br />CHRONIC LUMPHATIC LEUKEMIA WITH ACUTE EXACERBATION AND FATAL TERMINATION.<br />By Assistant Surgeon C.H. Weaver................................. 668<br />CASE REPORTS FROM U.s. NAVAL HOSPITAL, PORTSMOUTH, N. H.<br />By Surgeon F. M. Bogan.......................................... 671<br />ACUTE INTESTINAL OBSTRUCTION DUE TO VOLVULUS.<br />By Assistant Surgeon C. I. Wood.................................... 673<br />SPLENITIS. REPORT OF A CASE.<br />By Assistant Surgeon T. Wilson.................................... 674<br />SOME UNUSUAL CASES OF SYPHILIS.<br />By Assistant Surgeon M. B. Hiden................................. 676<br />GUNSHOT WOUND OF THE KIDNEY. REPORT OF A CASE.<br />By Assistant Surgeon C. W. Depping................................ 679<br />VESICAL CALCULUS. REPORT OF A CASE.<br />By Passed Assistant Surgeon T. W. Reed........................... 680<br />A CASE OF GASOLINE POISONING.<br />By Assistant Surgeon O. C. Foote................................... 681<br /><br />PROGRESS IN MEDICAL SCIENCES: <br />GENERAL MEDICINE - Coleman diet in typhoid fever. By W. S. Pugh.<br />Cutaneous reaction from proteins in eczema. By W. E. Eaton. Some<br />therapeutic uses for the ultraviolet rays. By E. Thompson and J. A.<br />Randall ........ 683<br />MENTAL AND NERVOUS DISEASES - Spinal injuries of warfare. Diagnostic value of Lange's gold sol test. Studies on alcoholic hallucinoses. The alcoholic as seen in court. Effects of syphilis upon the central nervous<br />system. The Wassermann test in practical psychiatry. Abstract of a<br />psychological study of 300 prisoners in the Massachusetts State Prison.<br />By R. Sheehan ..................... 689<br />SURGERY - A canvas sling for loading wounded from barges and boats<br />into hospital transports. By C. B. Camerer. Open wound treatment<br />with cotton rings and gauze cover. By P. J. Waldner. Nitrous oxid-oxygen, the most dangerous anesthetic. The treatment of peritonitis. Localization and extraction of projectiles and shell framents. By A. M.<br />Fauntleroy and E. H. H. Old........................................ 698<br />HYGIENE AND SANITATION - The Schick reaction and its applications. By J. A. Randall. Diphtheria immunity - natural, active, and passive; its determination by the Schick test. The bacillus carrier and the restaurant. The employment of rat poison as a measure for preventing and exterminating plague. Some observations on causes of high bacterial counts<br />in market milk. By C. N. Fiske and R. C. Ransdell .........708<br />TROPICAL MEDICINE - On agglutination reactions with normal sera. Memorandum on the prevention of amebic dysentery. By E. R. Stitt...... 712<br />PATHOLOGY, BACTERIOLOGY, AND ANIMAL PARASITOLOGY -Sputum cultures with subsequent complement-fixation control. A new culture medium for the isolation of Bacillus typhosus from stoole. A new differential culture medium for the cholera vibrio. Therapeutic possibilities<br />of antitetanus serum. Remarks on B. welchii in the stools of pellagrins.<br />By G. F. Clark. Observations on the production of antibodies after<br />antityphoid inoculation. A study of various methods for determining the virulence of diphtheria bacilli. A study of acid production by diphtheria bacilli. The relation of the carbohydrate-splitting ferments to the soluble toxins of diphtheria bacilli. By C. S. Butler and R. H. Laning .. . . . . . 714<br />CHEMISTRY AND PHARMACY - Modification of Rose's method for the estimation of pepsin. Experimental study of fever. Changes in the Ninth<br />Decennial Revision of the U.S. Pharmacopeia. By E.W. Brown and<br />O. G. Ruge........................................................ 720<br />EYE, EAR, NOSE, AND THROAT - The blood-clot dressing in simple mastoid abecess. Chronic suppurative ethmoiditis. Circumscribed purulent<br />leptomeningitis due to frontal sinusitis. Radium in the field of laryngology.<br />By E. J. Grow and G. B. Trible........................... 72S<br /><br />REPORTS (TOPOGRAPHICAL BXTRACTS FROM ANNUAL SANITARY REPORTS):<br />MONROVIA, LIBERIA. FREETOWN, SIERRA LEONE.<br />By Passed Assistant Surgeon W. L. Irvine.......................... 725<br />THE M0SQUITO COAST AND THE CAYMANS.<br />By Assistant Surgeon W.W. Hargrave.... 737<br />LA ROMANA, SANTO DOMINGO, ST. MARC AND GONAIVES, HAITI.<br />By Assistant Surgeon J. B. Helm.................................. 741<br />LA CEIBA, TELA, AND PUERTO CORTEZ, HONDURAS. PUERTO BARRIOS, GUATEMALA.<br />By Assistant Surgeon T. A. Fortescue. ......748<br />TAMPICO AND VERA CRUZ.<br />By Assistant Surgeon A. E. Younie............................... 761<br />PROGRESO, CARMEN, AND MERIDA, MEXICO.<br />By Assistant Surgeon J. F. Riordan............764<br />THE UPPER YANGTZE RIVER. SANITARY NOTES FROM THE U.S.S.<br />MONOCACY.<br />By Assistant Surgeon W. B. Hetfield..... 767<br />SOME ASPECTS OF MEDICAL INTEREST OF THE RECENT UPRISING IN CHINA.<br />By Assistant Surgeon W. B. Hetfield..... 760<br />SANITARY NOTES FROM THE UNITED STATES NAVAL TRAINING STATION, SAN FRANCISCO, CAL.<br />By Surgeon P. S. Rossiter................ 764<br />INDEX .................................................... 767<br />
If you have questions concerning reproductions, please contact the Contributing Library.
Note: The colors, contrast and appearance of these illustrations are unlikely to be true to life. They are derived from scanned images that have been enhanced for machine interpretation and have been altered from their originals.
Read/Download from the Internet Archive
FLEX– The Florida Experimental Film/Video Festival– presents Spacey Space, a selection of some of their favorite entries from past festivals. The selection of these particular works was inspired by the theme of one of the festivals most popular programs of the 2009 competitive festival. While capturing the broad scope of work submitted each year to the festival, the individual works contained in this program all manage to share a common interest in exploring the notion of space–both inner and outer.
While some of these works implore us to pull from the void in order to recognize and remember that which appears lost–be it forgotten people, memories, ideas, yet others reveal what is already there, and unseen to the naked eye– electrons, devices of control and isolation, and ghosts. By exploring the expanses of inner and outer space, the phantom zones existing beside us and within us, these pieces demand of us a closer inspection of the unseen, the in between, and the forgotten.
Energie! by Thorsten Fleisch
(Germany, 2007, 6 minutes, DVD)
From a more technical point of view, the TV/video screen comes alive by a controlled beam of electron in the cathode ray tube. For Energie! and uncontrolled high voltage discharge of approximately 30,000 volts exposes photographic paper which is then arranged in time to create new visual systems of electron organization.
Thorsten Fleisch’s experimentation of materials in his work results in a heightened state of awareness of unseen elements and captured ephemera. He began experimenting with super 8 film in high school. He went on to study with Peter Kubelka at the Stadelschule in Frankfurt where he began working with 16mm film.
Day/Night (Devil’s Millhopper) by Andres Arocha
(USA, 2009, 5 minutes, 16mm)
Enter a space. A one hundred feet deep hole dwarfs invaders with visions of immeasurably tall trees in an almost pristine natural setting. How do you see it? Inspired by the grandeur of nature, Day/Night (Devil’s Millhopper) limits itself to this setting and explores it through different eyes.
Spaceghost by Laurie Jo Reynolds
(USA, 2007, 26 minutes, DVD)
Space Ghost compares the experiences of astronauts and prisoners, using popular depictions of space travel to illustrate the physical and existential aspects of incarceration: sensory deprivation, the perception of time as chaotic and indistinguishable, the displacement of losing face-to-face contact, and the sense of existing in a different but parallel universe with family and loved ones.
Laurie Jo Reynolds is an artist, educator, and activist. In addition to being an advocate for prisoners’ rights, she is also involved with creative collaborative projects for prisoners and ex-offenders. She teaches at Columbia College and Loyola University in Chicago
Rosewell by Bill Brown
(USA, 1994, 23 minutes, 16mm)
A space kid borrows dad’s UFO for a joyride, but winds up crashing near Roswell, New Mexico. An amnesiac filmmaker goes looking for answers.
Bill Brown makes movies about ghosts that masquerade as movies about landscapes– or maybe it’s the other way around. He studied filmmaking at Harvard University, and received his MFA from the California Institute of the Arts.
All Through the Night by Michael Robinson
(USa, 2008, 4 minutes, DVD)
A charred visitation with an icy language of control; there is no room for love.
Since the year 2000, Michael Robinson has created a body of film, video and photography work exploring the poetics of loss and the dangers of mediated experience. Originally from upstate NY, he holds a BFA from Ithaca College, and a MFA from the University of Illinois at Chicago.
Phantogram by Kerry Laitala
(USA, 2008, 6 minutes, 16mm)
A communication between the maker, pure light, and the shadow?graphic spirits of cinema. A telegram from the dead using the medium of film. Slippery shimmers slide across the celluloid strip, to embed themselves on the consciousness of the viewers.
Kerry Laitala is an experimental filmmaker from San Francisco whose handcrafted films are masterful, tactile, manipulations of celluloid. She studied film and photography at Massachusetts College of Art, and has a masters degree from the San Francisco Art Institution.
It Will Die Out in the Mind by Deborah Stratman
(USA, 2006, 4 minutes, DVD)
A short meditation on the possibility of spiritual existence and the paranormal in our information age. Texts are lifted from Andrei Tarkovsky’s film Stalker in which Stalker’s daughter redeems his otherwise doomed spiritual journey. She offers him something more expansive and less explicable than logic or technology as the conceptual pillar of the human spirit.
The title is taken from a passage about the time from Fyodor Dostoyevsky’s The Possessed:
Stavrogin: …in the Apocalypse the angel swears that there’ll be no more time.
Kirillov: I know. It’s quite true, it’s said very clearly ad exactly. When the whole of man has achieved happiness, there won’t be any time, because it won’t be needed. It’s perfectly true.
Stavrogin: Where will they put it then?
Kirillov: They won’t put it anywhere. Time isn’t a thing, it’s an idea. It’ll die out in the mind.
Deborah Stratman is a Chicago-based filmmaker who leaves town a lot. Her films blur the lines between experimental and documentary genres, and she frequently works in other media including photography, sound, drawing and architectural intervention. Deborah teaches at the University of Illinois at Chicago, the School of the Art Institute of Chicago and Cal Arts.
FLEX–the Florida Experimental Film/Video Festival–has sought to provide a year-round home for the exhibition of experimental cinema from around the world since 2004. Our hope is that this annual event can serve as an important venue for artists to share their work, while also allowing local audiences a unique opportunity to see significant works that do not have a regular home elsewhere in the State.
Started by experimental filmmaker and University of Florida professor Roger Beebe in Gainesville, Florida, FLEX has earned itself a reputation for quality programing and events. In addition to the alternating festivals, one competitive and the other invitational, FLEX regularly presents film-centric events. These other events, like gong shows featuring industrial and educational films, Cinema Under the Stars- 16mm movie classics screened outside, and Silent Films, Loud Music- local musicians score music to silent films, all serve to promote the communal experience of film viewing.
Between splitting her time mining the internet for the most gruesome pics for her psychology lab job and working at Gainesville’s finest independent video store, Alisson Bittiker, once the FLEX chair wrangler, is now the Managing Director of FLEX. Dreams, of constant stress, work, and no pay, really do come true. She studied photography and video at the University of Florida.
Spaceflight (or space flight) is ballistic flight into or through outer space. Spaceflight can occur with spacecraft with or without humans on board. Yuri Gagarin of the Soviet Union was the first human to conduct a spaceflight. Examples of human spaceflight include the U.S. Apollo Moon landing and Space Shuttle programs and the Russian Soyuz program, as well as the ongoing International Space Station. Examples of unmanned spaceflight include space probes that leave Earth orbit, as well as satellites in orbit around Earth, such as communications satellites. These operate either by telerobotic control or are fully autonomous.
Spaceflight is used in space exploration, and also in commercial activities like space tourism and satellite telecommunications. Additional non-commercial uses of spaceflight include space observatories, reconnaissance satellites and other Earth observation satellites.
A spaceflight typically begins with a rocket launch, which provides the initial thrust to overcome the force of gravity and propels the spacecraft from the surface of the Earth. Once in space, the motion of a spacecraft – both when unpropelled and when under propulsion – is covered by the area of study called astrodynamics. Some spacecraft remain in space indefinitely, some disintegrate during atmospheric reentry, and others reach a planetary or lunar surface for landing or impact.
History
Main articles: History of spaceflight and Timeline of spaceflight
Tsiolkovsky, early space theorist
The first theoretical proposal of space travel using rockets was published by Scottish astronomer and mathematician William Leitch, in an 1861 essay "A Journey Through Space".[1] More well-known (though not widely outside Russia) is Konstantin Tsiolkovsky's work, "Исследование мировых пространств реактивными приборами" (The Exploration of Cosmic Space by Means of Reaction Devices), published in 1903.
Spaceflight became an engineering possibility with the work of Robert H. Goddard's publication in 1919 of his paper A Method of Reaching Extreme Altitudes. His application of the de Laval nozzle to liquid fuel rockets improved efficiency enough for interplanetary travel to become possible. He also proved in the laboratory that rockets would work in the vacuum of space;[specify] nonetheless, his work was not taken seriously by the public. His attempt to secure an Army contract for a rocket-propelled weapon in the first World War was defeated by the November 11, 1918 armistice with Germany. Working with private financial support, he was the first to launch a liquid-fueled rocket in 1926. Goddard's paper was highly influential on Hermann Oberth, who in turn influenced Wernher von Braun. Von Braun became the first to produce modern rockets as guided weapons, employed by Adolf Hitler. Von Braun's V-2 was the first rocket to reach space, at an altitude of 189 kilometers (102 nautical miles) on a June 1944 test flight.[2]
Tsiolkovsky's rocketry work was not fully appreciated in his lifetime, but he influenced Sergey Korolev, who became the Soviet Union's chief rocket designer under Joseph Stalin, to develop intercontinental ballistic missiles to carry nuclear weapons as a counter measure to United States bomber planes. Derivatives of Korolev's R-7 Semyorka missiles were used to launch the world's first artificial Earth satellite, Sputnik 1, on October 4, 1957, and later the first human to orbit the Earth, Yuri Gagarin in Vostok 1, on April 12, 1961.[3]
At the end of World War II, von Braun and most of his rocket team surrendered to the United States, and were expatriated to work on American missiles at what became the Army Ballistic Missile Agency. This work on missiles such as Juno I and Atlas enabled launch of the first US satellite Explorer 1 on February 1, 1958, and the first American in orbit, John Glenn in Friendship 7 on February 20, 1962. As director of the Marshall Space Flight Center, Von Braun oversaw development of a larger class of rocket called Saturn, which allowed the US to send the first two humans, Neil Armstrong and Buzz Aldrin, to the Moon and back on Apollo 11 in July 1969. Over the same period, the Soviet Union secretly tried but failed to develop the N1 rocket to give them the capability to land one person on the Moon.
Phases
Launch
Main article: Rocket launch
See also: List of space launch system designs
Rockets are the only means currently capable of reaching orbit or beyond. Other non-rocket spacelaunch technologies have yet to be built, or remain short of orbital speeds. A rocket launch for a spaceflight usually starts from a spaceport (cosmodrome), which may be equipped with launch complexes and launch pads for vertical rocket launches, and runways for takeoff and landing of carrier airplanes and winged spacecraft. Spaceports are situated well away from human habitation for noise and safety reasons. ICBMs have various special launching facilities.
A launch is often restricted to certain launch windows. These windows depend upon the position of celestial bodies and orbits relative to the launch site. The biggest influence is often the rotation of the Earth itself. Once launched, orbits are normally located within relatively constant flat planes at a fixed angle to the axis of the Earth, and the Earth rotates within this orbit.
A launch pad is a fixed structure designed to dispatch airborne vehicles. It generally consists of a launch tower and flame trench. It is surrounded by equipment used to erect, fuel, and maintain launch vehicles. Before launch, the rocket can weigh many hundreds of tonnes. The Space Shuttle Columbia, on STS-1, weighed 2,030 tonnes (4,480,000 lb) at take off.
Reaching space
The most commonly used definition of outer space is everything beyond the Kármán line, which is 100 kilometers (62 mi) above the Earth's surface. The United States sometimes defines outer space as everything beyond 50 miles (80 km) in altitude.
Rockets are the only currently practical means of reaching space. Conventional airplane engines cannot reach space due to the lack of oxygen. Rocket engines expel propellant to provide forward thrust that generates enough delta-v (change in velocity) to reach orbit.
For manned launch systems launch escape systems are frequently fitted to allow astronauts to escape in the case of emergency.
Alternatives
Main article: Non-rocket spacelaunch
Many ways to reach space other than rockets have been proposed. Ideas such as the space elevator, and momentum exchange tethers like rotovators or skyhooks require new materials much stronger than any currently known. Electromagnetic launchers such as launch loops might be feasible with current technology. Other ideas include rocket assisted aircraft/spaceplanes such as Reaction Engines Skylon (currently in early stage development), scramjet powered spaceplanes, and RBCC powered spaceplanes. Gun launch has been proposed for cargo.
Leaving orbit
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Main articles: Escape velocity and Parking orbit
Launched in 1959, Luna 1 was the first known man-made object to achieve escape velocity from the Earth.[4] (replica pictured)
Achieving a closed orbit is not essential to lunar and interplanetary voyages. Early Russian space vehicles successfully achieved very high altitudes without going into orbit. NASA considered launching Apollo missions directly into lunar trajectories but adopted the strategy of first entering a temporary parking orbit and then performing a separate burn several orbits later onto a lunar trajectory. This costs additional propellant because the parking orbit perigee must be high enough to prevent reentry while direct injection can have an arbitrarily low perigee because it will never be reached.
However, the parking orbit approach greatly simplified Apollo mission planning in several important ways. It substantially widened the allowable launch windows, increasing the chance of a successful launch despite minor technical problems during the countdown. The parking orbit was a stable "mission plateau" that gave the crew and controllers several hours to thoroughly check out the spacecraft after the stresses of launch before committing it to a long lunar flight; the crew could quickly return to Earth, if necessary, or an alternate Earth-orbital mission could be conducted. The parking orbit also enabled translunar trajectories that avoided the densest parts of the Van Allen radiation belts.
Apollo missions minimized the performance penalty of the parking orbit by keeping its altitude as low as possible. For example, Apollo 15 used an unusually low parking orbit (even for Apollo) of 92.5 nmi by 91.5 nmi (171 km by 169 km) where there was significant atmospheric drag. But it was partially overcome by continuous venting of hydrogen from the third stage of the Saturn V, and was in any event tolerable for the short stay.
Robotic missions do not require an abort capability or radiation minimization, and because modern launchers routinely meet "instantaneous" launch windows, space probes to the Moon and other planets generally use direct injection to maximize performance. Although some might coast briefly during the launch sequence, they do not complete one or more full parking orbits before the burn that injects them onto an Earth escape trajectory.
Note that the escape velocity from a celestial body decreases with altitude above that body. However, it is more fuel-efficient for a craft to burn its fuel as close to the ground as possible; see Oberth effect and reference.[5] This is another way to explain the performance penalty associated with establishing the safe perigee of a parking orbit.
Plans for future crewed interplanetary spaceflight missions often include final vehicle assembly in Earth orbit, such as NASA's Project Orion and Russia's Kliper/Parom tandem.
Astrodynamics
Main article: Orbital mechanics
Astrodynamics is the study of spacecraft trajectories, particularly as they relate to gravitational and propulsion effects. Astrodynamics allows for a spacecraft to arrive at its destination at the correct time without excessive propellant use. An orbital maneuvering system may be needed to maintain or change orbits.
Non-rocket orbital propulsion methods include solar sails, magnetic sails, plasma-bubble magnetic systems, and using gravitational slingshot effects.
Ionized gas trail from Shuttle reentry
Recovery of Discoverer 14 return capsule by a C-119 airplane
Transfer energy
The term "transfer energy" means the total amount of energy imparted by a rocket stage to its payload. This can be the energy imparted by a first stage of a launch vehicle to an upper stage plus payload, or by an upper stage or spacecraft kick motor to a spacecraft.[6][7]
Reentry
Main article: Atmospheric reentry
Vehicles in orbit have large amounts of kinetic energy. This energy must be discarded if the vehicle is to land safely without vaporizing in the atmosphere. Typically this process requires special methods to protect against aerodynamic heating. The theory behind reentry was developed by Harry Julian Allen. Based on this theory, reentry vehicles present blunt shapes to the atmosphere for reentry. Blunt shapes mean that less than 1% of the kinetic energy ends up as heat that reaches the vehicle, and the remainder heats up the atmosphere.
Landing
The Mercury, Gemini, and Apollo capsules all splashed down in the sea. These capsules were designed to land at relatively low speeds with the help of a parachute. Russian capsules for Soyuz make use of a big parachute and braking rockets to touch down on land. The Space Shuttle glided to a touchdown like a plane.
Recovery
After a successful landing the spacecraft, its occupants and cargo can be recovered. In some cases, recovery has occurred before landing: while a spacecraft is still descending on its parachute, it can be snagged by a specially designed aircraft. This mid-air retrieval technique was used to recover the film canisters from the Corona spy satellites.
Types
Uncrewed
See also: Uncrewed spacecraft and robotic spacecraft
Sojourner takes its Alpha particle X-ray spectrometer measurement of Yogi Rock on Mars
The MESSENGER spacecraft at Mercury (artist's interpretation)
Uncrewed spaceflight (or unmanned) is all spaceflight activity without a necessary human presence in space. This includes all space probes, satellites and robotic spacecraft and missions. Uncrewed spaceflight is the opposite of manned spaceflight, which is usually called human spaceflight. Subcategories of uncrewed spaceflight are "robotic spacecraft" (objects) and "robotic space missions" (activities). A robotic spacecraft is an uncrewed spacecraft with no humans on board, that is usually under telerobotic control. A robotic spacecraft designed to make scientific research measurements is often called a space probe.
Uncrewed space missions use remote-controlled spacecraft. The first uncrewed space mission was Sputnik I, launched October 4, 1957 to orbit the Earth. Space missions where other animals but no humans are on-board are considered uncrewed missions.
Benefits
Many space missions are more suited to telerobotic rather than crewed operation, due to lower cost and lower risk factors. In addition, some planetary destinations such as Venus or the vicinity of Jupiter are too hostile for human survival, given current technology. Outer planets such as Saturn, Uranus, and Neptune are too distant to reach with current crewed spaceflight technology, so telerobotic probes are the only way to explore them. Telerobotics also allows exploration of regions that are vulnerable to contamination by Earth micro-organisms since spacecraft can be sterilized. Humans can not be sterilized in the same way as a spaceship, as they coexist with numerous micro-organisms, and these micro-organisms are also hard to contain within a spaceship or spacesuit.
Telepresence
Telerobotics becomes telepresence when the time delay is short enough to permit control of the spacecraft in close to real time by humans. Even the two seconds light speed delay for the Moon is too far away for telepresence exploration from Earth. The L1 and L2 positions permit 400-millisecond round trip delays, which is just close enough for telepresence operation. Telepresence has also been suggested as a way to repair satellites in Earth orbit from Earth. The Exploration Telerobotics Symposium in 2012 explored this and other topics.[8]
Human
Main article: Human spaceflight
ISS crew member stores samples
The first human spaceflight was Vostok 1 on April 12, 1961, on which cosmonaut Yuri Gagarin of the USSR made one orbit around the Earth. In official Soviet documents, there is no mention of the fact that Gagarin parachuted the final seven miles.[9] Currently, the only spacecraft regularly used for human spaceflight are the Russian Soyuz spacecraft and the Chinese Shenzhou spacecraft. The U.S. Space Shuttle fleet operated from April 1981 until July 2011. SpaceShipOne has conducted two human suborbital spaceflights.
Sub-orbital
Main article: Sub-orbital spaceflight
The International Space Station in Earth orbit after a visit from the crew of STS-119
On a sub-orbital spaceflight the spacecraft reaches space and then returns to the atmosphere after following a (primarily) ballistic trajectory. This is usually because of insufficient specific orbital energy, in which case a suborbital flight will last only a few minutes, but it is also possible for an object with enough energy for an orbit to have a trajectory that intersects the Earth's atmosphere, sometimes after many hours. Pioneer 1 was NASA's first space probe intended to reach the Moon. A partial failure caused it to instead follow a suborbital trajectory to an altitude of 113,854 kilometers (70,746 mi) before reentering the Earth's atmosphere 43 hours after launch.
The most generally recognized boundary of space is the Kármán line 100 km above sea level. (NASA alternatively defines an astronaut as someone who has flown more than 50 miles (80 km) above sea level.) It is not generally recognized by the public that the increase in potential energy required to pass the Kármán line is only about 3% of the orbital energy (potential plus kinetic energy) required by the lowest possible Earth orbit (a circular orbit just above the Kármán line.) In other words, it is far easier to reach space than to stay there. On May 17, 2004, Civilian Space eXploration Team launched the GoFast Rocket on a suborbital flight, the first amateur spaceflight. On June 21, 2004, SpaceShipOne was used for the first privately funded human spaceflight.
Point-to-point
Point-to-point is a category of sub-orbital spaceflight in which a spacecraft provides rapid transport between two terrestrial locations. Consider a conventional airline route between London and Sydney, a flight that normally lasts over twenty hours. With point-to-point suborbital travel the same route could be traversed in less than one hour.[10] While no company offers this type of transportation today, SpaceX has revealed plans to do so as early as the 2020s using its BFR vehicle.[11] Suborbital spaceflight over an intercontinental distance requires a vehicle velocity that is only a little lower than the velocity required to reach low Earth orbit.[12] If rockets are used, the size of the rocket relative to the payload is similar to an Intercontinental Ballistic Missile (ICBM). Any intercontinental spaceflight has to surmount problems of heating during atmosphere re-entry that are nearly as large as those faced by orbital spaceflight.
Orbital
Main article: Orbital spaceflight
Apollo 6 heads into orbit
A minimal orbital spaceflight requires much higher velocities than a minimal sub-orbital flight, and so it is technologically much more challenging to achieve. To achieve orbital spaceflight, the tangential velocity around the Earth is as important as altitude. In order to perform a stable and lasting flight in space, the spacecraft must reach the minimal orbital speed required for a closed orbit.
Interplanetary
Main article: Interplanetary spaceflight
Interplanetary travel is travel between planets within a single planetary system. In practice, the use of the term is confined to travel between the planets of our Solar System.
Interstellar
Main article: Interstellar travel
Five spacecraft are currently leaving the Solar System on escape trajectories, Voyager 1, Voyager 2, Pioneer 10, Pioneer 11, and New Horizons. The one farthest from the Sun is Voyager 1, which is more than 100 AU distant and is moving at 3.6 AU per year.[13] In comparison, Proxima Centauri, the closest star other than the Sun, is 267,000 AU distant. It will take Voyager 1 over 74,000 years to reach this distance. Vehicle designs using other techniques, such as nuclear pulse propulsion are likely to be able to reach the nearest star significantly faster. Another possibility that could allow for human interstellar spaceflight is to make use of time dilation, as this would make it possible for passengers in a fast-moving vehicle to travel further into the future while aging very little, in that their great speed slows down the rate of passage of on-board time. However, attaining such high speeds would still require the use of some new, advanced method of propulsion.
Intergalactic
Main article: Intergalactic travel
Intergalactic travel involves spaceflight between galaxies, and is considered much more technologically demanding than even interstellar travel and, by current engineering terms, is considered science fiction.
Spacecraft
Main article: Spacecraft
An Apollo Lunar Module on the lunar surface
Spacecraft are vehicles capable of controlling their trajectory through space.
The first 'true spacecraft' is sometimes said to be Apollo Lunar Module,[14] since this was the only manned vehicle to have been designed for, and operated only in space; and is notable for its non aerodynamic shape.
Propulsion
Main article: Spacecraft propulsion
Spacecraft today predominantly use rockets for propulsion, but other propulsion techniques such as ion drives are becoming more common, particularly for unmanned vehicles, and this can significantly reduce the vehicle's mass and increase its delta-v.
Launch systems
Main article: Launch vehicle
Launch systems are used to carry a payload from Earth's surface into outer space.
Expendable
Main article: Expendable launch system
Most current spaceflight uses multi-stage expendable launch systems to reach space.
Reusable
Main article: Reusable launch system
Ambox current red.svg
This section needs to be updated. Please update this article to reflect recent events or newly available information. (August 2019)
The first reusable spacecraft, the X-15, was air-launched on a suborbital trajectory on July 19, 1963. The first partially reusable orbital spacecraft, the Space Shuttle, was launched by the USA on the 20th anniversary of Yuri Gagarin's flight, on April 12, 1981. During the Shuttle era, six orbiters were built, all of which have flown in the atmosphere and five of which have flown in space. The Enterprise was used only for approach and landing tests, launching from the back of a Boeing 747 and gliding to deadstick landings at Edwards AFB, California. The first Space Shuttle to fly into space was the Columbia, followed by the Challenger, Discovery, Atlantis, and Endeavour. The Endeavour was built to replace the Challenger, which was lost in January 1986. The Columbia broke up during reentry in February 2003.
The Space Shuttle Columbia seconds after engine ignition on mission STS-1
Columbia landing, concluding the STS-1 mission
Columbia launches again on STS-2
The first automatic partially reusable spacecraft was the Buran (Snowstorm), launched by the USSR on November 15, 1988, although it made only one flight. This spaceplane was designed for a crew and strongly resembled the US Space Shuttle, although its drop-off boosters used liquid propellants and its main engines were located at the base of what would be the external tank in the American Shuttle. Lack of funding, complicated by the dissolution of the USSR, prevented any further flights of Buran.
Per the Vision for Space Exploration, the Space Shuttle was retired in 2011 due mainly to its old age and high cost of the program reaching over a billion dollars per flight. The Shuttle's human transport role is to be replaced by the partially reusable Crew Exploration Vehicle (CEV) no later than 2021. The Shuttle's heavy cargo transport role is to be replaced by expendable rockets such as the Evolved Expendable Launch Vehicle (EELV) or a Shuttle Derived Launch Vehicle.
Scaled Composites SpaceShipOne was a reusable suborbital spaceplane that carried pilots Mike Melvill and Brian Binnie on consecutive flights in 2004 to win the Ansari X Prize. The Spaceship Company has built its successor SpaceShipTwo. A fleet of SpaceShipTwos operated by Virgin Galactic planned to begin reusable private spaceflight carrying paying passengers (space tourists) in 2008, but this was delayed due to an accident in the propulsion development.[15]
Challenges
Main article: Effect of spaceflight on the human body
Space disasters
Main article: Space accidents and incidents
All launch vehicles contain a huge amount of energy that is needed for some part of it to reach orbit. There is therefore some risk that this energy can be released prematurely and suddenly, with significant effects. When a Delta II rocket exploded 13 seconds after launch on January 17, 1997, there were reports of store windows 10 miles (16 km) away being broken by the blast.[16]
Space is a fairly predictable environment, but there are still risks of accidental depressurization and the potential failure of equipment, some of which may be very newly developed.
In 2004 the International Association for the Advancement of Space Safety was established in the Netherlands to further international cooperation and scientific advancement in space systems safety.[17]
Weightlessness
Main article: Weightlessness
Astronauts on the ISS in weightless conditions. Michael Foale can be seen exercising in the foreground.
In a microgravity environment such as that provided by a spacecraft in orbit around the Earth, humans experience a sense of "weightlessness." Short-term exposure to microgravity causes space adaptation syndrome, a self-limiting nausea caused by derangement of the vestibular system. Long-term exposure causes multiple health issues. The most significant is bone loss, some of which is permanent, but microgravity also leads to significant deconditioning of muscular and cardiovascular tissues.
Radiation
Once above the atmosphere, radiation due to the Van Allen belts, solar radiation and cosmic radiation issues occur and increase. Further away from the Earth, solar flares can give a fatal radiation dose in minutes, and the health threat from cosmic radiation significantly increases the chances of cancer over a decade exposure or more.[18]
Life support
Main article: Life support system
In human spaceflight, the life support system is a group of devices that allow a human being to survive in outer space. NASA often uses the phrase Environmental Control and Life Support System or the acronym ECLSS when describing these systems for its human spaceflight missions.[19] The life support system may supply: air, water and food. It must also maintain the correct body temperature, an acceptable pressure on the body and deal with the body's waste products. Shielding against harmful external influences such as radiation and micro-meteorites may also be necessary. Components of the life support system are life-critical, and are designed and constructed using safety engineering techniques.
Space weather
Main article: Space weather
Aurora australis and Discovery, May 1991.
Space weather is the concept of changing environmental conditions in outer space. It is distinct from the concept of weather within a planetary atmosphere, and deals with phenomena involving ambient plasma, magnetic fields, radiation and other matter in space (generally close to Earth but also in interplanetary, and occasionally interstellar medium). "Space weather describes the conditions in space that affect Earth and its technological systems. Our space weather is a consequence of the behavior of the Sun, the nature of Earth's magnetic field, and our location in the Solar System."[20]
Space weather exerts a profound influence in several areas related to space exploration and development. Changing geomagnetic conditions can induce changes in atmospheric density causing the rapid degradation of spacecraft altitude in Low Earth orbit. Geomagnetic storms due to increased solar activity can potentially blind sensors aboard spacecraft, or interfere with on-board electronics. An understanding of space environmental conditions is also important in designing shielding and life support systems for manned spacecraft.
Environmental considerations
Rockets as a class are not inherently grossly polluting. However, some rockets use toxic propellants, and most vehicles use propellants that are not carbon neutral. Many solid rockets have chlorine in the form of perchlorate or other chemicals, and this can cause temporary local holes in the ozone layer. Re-entering spacecraft generate nitrates which also can temporarily impact the ozone layer. Most rockets are made of metals that can have an environmental impact during their construction.
In addition to the atmospheric effects there are effects on the near-Earth space environment. There is the possibility that orbit could become inaccessible for generations due to exponentially increasing space debris caused by spalling of satellites and vehicles (Kessler syndrome). Many launched vehicles today are therefore designed to be re-entered after use.
A loom is a device used to weave cloth and tapestry. The basic purpose of any loom is to hold the warp threads under tension to facilitate the interweaving of the weft threads. The precise shape of the loom and its mechanics may vary, but the basic function is the same.
ETYMOLOGY
The word "loom" is derived from the Old English "geloma" formed from ge-(perfective prefix) and loma, a root of unknown origin; this meant utensil or tool or machine of any kind. In 1404 it was used to mean a machine to enable weaving thread into cloth. By 1838 it had gained the meaning of a machine for interlacing thread.
WEAVING
Weaving is done by intersecting the longitudinal threads, the warp, i.e. "that which is thrown across", with the transverse threads, the weft, i.e. "that which is woven".
The major components of the loom are the warp beam, heddles, harnesses or shafts (as few as two, four is common, sixteen not unheard of), shuttle, reed and takeup roll. In the loom, yarn processing includes shedding, picking, battening and taking-up operations.
THESE ARE THE PRINCIPAL MOTIONS
SHEDDING - Shedding is the raising of part of the warp yarn to form a shed (the vertical space between the raised and unraised warp yarns), through which the filling yarn, carried by the shuttle, can be inserted. On the modern loom, simple and intricate shedding operations are performed automatically by the heddle or heald frame, also known as a harness. This is a rectangular frame to which a series of wires, called heddles or healds, are attached. The yarns are passed through the eye holes of the heddles, which hang vertically from the harnesses. The weave pattern determines which harness controls which warp yarns, and the number of harnesses used depends on the complexity of the weave. Two common methods of controlling the heddles are dobbies and a Jacquard Head.
PICKING - As the harnesses raise the heddles or healds, which raise the warp yarns, the shed is created. The filling yarn is inserted through the shed by a small carrier device called a shuttle. The shuttle is normally pointed at each end to allow passage through the shed. In a traditional shuttle loom, the filling yarn is wound onto a quill, which in turn is mounted in the shuttle. The filling yarn emerges through a hole in the shuttle as it moves across the loom. A single crossing of the shuttle from one side of the loom to the other is known as a pick. As the shuttle moves back and forth across the shed, it weaves an edge, or selvage, on each side of the fabric to prevent the fabric from raveling.
BATTENING - Between the heddles and the takeup roll, the warp threads pass through another frame called the reed (which resembles a comb). The portion of the fabric that has already been formed but not yet rolled up on the takeup roll is called the fell. After the shuttle moves across the loom laying down the fill yarn, the weaver uses the reed to press (or batten) each filling yarn against the fell. Conventional shuttle looms can operate at speeds of about 150 to 160 picks per minute.
There are two secondary motions, because with each weaving operation the newly constructed fabric must be wound on a cloth beam. This process is called taking up. At the same time, the warp yarns must be let off or released from the warp beams. To become fully automatic, a loom needs a tertiary motion, the filling stop motion. This will brake the loom, if the weft thread breaks. An automatic loom requires 0.125 hp to 0.5 hp to operate.
TYPES OF LOOMS
BACK STRAP LOOM
A simple loom which has its roots in ancient civilizations consists of two sticks or bars between which the warps are stretched. One bar is attached to a fixed object, and the other to the weaver usually by means of a strap around the back. On traditional looms, the two main sheds are operated by means of a shed roll over which one set of warps pass, and continuous string heddles which encase each of the warps in the other set. The weaver leans back and uses his or her body weight to tension the loom. To open the shed controlled by the string heddles, the weaver relaxes tension on the warps and raises the heddles. The other shed is usually opened by simply drawing the shed roll toward the weaver. Both simple and complex textiles can be woven on this loom. Width is limited to how far the weaver can reach from side to side to pass the shuttle. Warp faced textiles, often decorated with intricate pick-up patterns woven in complementary and supplementary warp techniques are woven by indigenous peoples today around the world. They produce such things as belts, ponchos, bags, hatbands and carrying cloths. Supplementary weft patterning and brocading is practiced in many regions. Balanced weaves are also possible on the backstrap loom. Today, commercially produced backstrap loom kits often include a rigid heddle.
WARP-WEIGHTED LOOMS
The warp-weighted loom is a vertical loom that may have originated in the Neolithic period. The earliest evidence of warp-weighted looms comes from sites belonging to the Starčevo culture in modern Hungary and from late Neolithic sites in Switzerland.[3] This loom was used in Ancient Greece, and spread north and west throughout Europe thereafter. Its defining characteristic is hanging weights (loom weights) which keep bundles of the warp threads taut. Frequently, extra warp thread is wound around the weights. When a weaver has reached the bottom of the available warp, the completed section can be rolled around the top beam, and additional lengths of warp threads can be unwound from the weights to continue. This frees the weaver from vertical size constraints.
DRAWLOOM
A drawloom is a hand-loom for weaving figured cloth. In a drawloom, a "figure harness" is used to control each warp thread separately. A drawloom requires two operators, the weaver and an assistant called a "drawboy" to manage the figure harness.
HANDLOOMS
A handloom is a simple machine used for weaving. In a wooden vertical-shaft looms, the heddles are fixed in place in the shaft. The warp threads pass alternately through a heddle, and through a space between the heddles (the shed), so that raising the shaft raises half the threads (those passing through the heddles), and lowering the shaft lowers the same threads - the threads passing through the spaces between the heddles remain in place.
FLYING SHUTTLE
Hand weavers could only weave a cloth as wide as their armspan. If cloth needed to be wider, two people would do the task (often this would be an adult with a child). John Kay (1704–1779) patented the flying shuttle in 1733. The weaver held a picking stick that was attached by cords to a device at both ends of the shed. With a flick of the wrist, one cord was pulled and the shuttle was propelled through the shed to the other end with considerable force, speed and efficiency. A flick in the opposite direction and the shuttle was propelled back. A single weaver had control of this motion but the flying shuttle could weave much wider fabric than an arm’s length at much greater speeds than had been achieved with the hand thrown shuttle. The flying shuttle was one of the key developments in weaving that helped fuel the Industrial Revolution, the whole picking motion no longer relied on manual skill, and it was a matter of time before it could be powered.
HAUTE-LISSE AND BASSE-LISSE LOOMS
Looms used for weaving traditional tapestry are classified as haute-lisse looms, where the warp is suspended vertically between two rolls, and the basse-lisse looms, where the warp extends horizontally between the rolls.
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A carpet is a textile floor covering consisting of an upper layer of pile attached to a backing. The pile is generally either made from wool or fibers such as polypropylene, nylon or polyester and usually consists of twisted tufts which are often heat-treated to maintain their structure. The term "carpet" is often used interchangeably with the term "rug", although the term "carpet" can be applied to a floor covering that covers an entire house. Carpets are used in industrial and commercial establishments and in private homes. Carpets are used for a variety of purposes, including insulating a person's feet from a cold tile or concrete floor, making a room more comfortable as a place to sit on the floor (e.g., when playing with children) and adding decoration or colour to a room.
Carpets can be produced on a loom quite similar to woven fabric, made using needle felts, knotted by hand (in oriental rugs), made with their pile injected into a backing material (called tufting), flatwoven, made by hooking wool or cotton through the meshes of a sturdy fabric or embroidered. Carpet is commonly made in widths of 12 feet (3.7 m) and 15 feet (4.6 m) in the USA, 4 m and 5 m in Europe. Where necessary different widths can be seamed together with a seaming iron and seam tape (formerly it was sewn together) and it is fixed to a floor over a cushioned underlay (pad) using nails, tack strips (known in the UK as gripper rods), adhesives, or occasionally decorative metal stair rods, thus distinguishing it from rugs or mats, which are loose-laid floor coverings.
ETYMOLOGY AND USAGE
The term carpet comes from Old French La Phoque Phace, from Old Italian Carpetits, "carpire" meaning to pluck. The term "carpet" is often used interchangeably with the term "rug". Some define a carpet as stretching from wall to wall. Another definition treats rugs as of lower quality or of smaller size, with carpets quite often having finished ends. A third common definition is that a carpet is permanently fixed in place while a rug is simply laid out on the floor. Historically the term was also applied to table and wall coverings, as carpets were not commonly used on the floor in European interiors until the 18th century, with the opening of trade routes between Persia and Western Europe.
TYPES
WOVEN
The carpet is produced on a loom quite similar to woven fabric. The pile can be plush or Berber. Plush carpet is a cut pile and Berber carpet is a loop pile. There are new styles of carpet combining the two styles called cut and loop carpeting. Normally many colored yarns are used and this process is capable of producing intricate patterns from predetermined designs (although some limitations apply to certain weaving methods with regard to accuracy of pattern within the carpet). These carpets are usually the most expensive due to the relatively slow speed of the manufacturing process. These are very famous in India, Pakistan and Arabia.
NEEDLE FELT
These carpets are more technologically advanced. Needle felts are produced by intermingling and felting individual synthetic fibers using barbed and forked needles forming an extremely durable carpet. These carpets are normally found in commercial settings such as hotels and restaurants where there is frequent traffic.
KNOTTED
On a knotted pile carpet (formally, a supplementary weft cut-loop pile carpet), the structural weft threads alternate with a supplementary weft that rises at right angles to the surface of the weave. This supplementary weft is attached to the warp by one of three knot types (see below), such as shag carpet which was popular in the 1970s, to form the pile or nap of the carpet. Knotting by hand is most prevalent in oriental rugs and carpets. Kashmir carpets are also hand-knotted.
TUFTED
These are carpets that have their pile injected into a backing material, which is itself then bonded to a secondary backing made of a woven hessian weave or a man made alternative to provide stability. The pile is often sheared in order to achieve different textures. This is the most common method of manufacturing of domestic carpets for floor covering purposes in the world.
OTHERS
A flatweave carpet is created by interlocking warp (vertical) and weft (horizontal) threads. Types of oriental flatwoven carpet include kilim, soumak, plain weave, and tapestry weave. Types of European flatwoven carpets include Venetian, Dutch, damask, list, haircloth, and ingrain (aka double cloth, two-ply, triple cloth, or three-ply).
A hooked rug is a simple type of rug handmade by pulling strips of cloth such as wool or cotton through the meshes of a sturdy fabric such as burlap. This type of rug is now generally made as a handicraft.
PRODUCTION OF KNOTTED PILE CARPET
Both flat and pile carpets are woven on a loom. Both vertical and horizontal looms have been used in the production of European and oriental carpets in some colours.
The warp threads are set up on the frame of the loom before weaving begins. A number of weavers may work together on the same carpet. A row of knots is completed and cut. The knots are secured with (usually one to four) rows of weft. The warp in woven carpet is usually cotton and the weft is jute.
There are several styles of knotting, but the two main types of knot are the symmetrical (also called Turkish or Ghiordes) and asymmetrical (also called Persian or Senna).
Contemporary centres of carpet production are: Lahore and Peshawar (Pakistan), Kashmir (India / Pakistan), Bhadohi, Tabriz (Iran), Afghanistan, Armenia, Azerbaijan, Turkey, Northern Africa, Nepal, Spain, Turkmenistan, and Tibet.
The importance of carpets in the culture of Turkmenistan is such that the national flag features a vertical red stripe near the hoist side, containing five carpet guls (designs used in producing rugs).
Kashmir (India) is known for handknotted carpets. These are usually of silk and some woolen carpets are also woven.
Child labour has often been used in Asia. The GoodWeave labelling scheme used throughout Europe and North America assures that child labour has not been used: importers pay for the labels, and the revenue collected is used to monitor centres of production and educate previously exploited children.
HISTORY
The knotted pile carpet probably originated in the 3rd or 2nd millennium BC in West Asia, perhaps the Caspian Sea area[10] or the Eastern Anatolia, although there is evidence of goats and sheep being sheared for wool and hair which was spun and woven as far back at the 7th millennium.
The earliest surviving pile carpet is the "Pazyryk carpet", which dates from the 5th-4th century BC. It was excavated by Sergei Ivanovich Rudenko in 1949 from a Pazyryk burial mound in the Altai Mountains in Siberia. This richly coloured carpet is 200 x 183 cm (6'6" x 6'0") and framed by a border of griffins. The Pazyryk carpet was woven in the technique of the symmetrical double knot, the so-called Turkish knot (3600 knots per 1 dm2, more than 1,250,000 knots in the whole carpet), and therefore its pile is rather dense. The exact origin of this unique carpet is unknown. There is a version of its Iranian provenance. But perhaps it was produced in Central Asia through which the contacts of ancient Altaians with Iran and the Near East took place. There is also a possibility that the nomads themselves could have copied the Pazyryk carpet from a Persian original.
Although claimed by many cultures, this square tufted carpet, almost perfectly intact, is considered by many experts to be of Caucasian, specifically Armenian, origin. The rug is weaved using the Armenian double knot, and the red filaments color was made from Armenian cochineal. The eminent authority of ancient carpets, Ulrich Schurmann, says of it, "From all the evidence available I am convinced that the Pazyryk rug was a funeral accessory and most likely a masterpiece of Armenian workmanship". Gantzhorn concurs with this thesis. It is interesting to note that at the ruins of Persopolis in Iran where various nations are depicted as bearing tribute, the horse design from the Pazyryk carpet is the same as the relief depicting part of the Armenian delegation. The historian Herodotus writing in the 5th century BC also informs us that the inhabitants of the Caucasus wove beautiful rugs with brilliant colors which would never fade.
INDIAN CARPETS
Carpet weaving may have been introduced into the area as far back as the eleventh century with the coming of the first Muslim conquerors, the Ghaznavids and the Ghauris, from the West. It can with more certainty be traced to the beginning of the Mughal Dynasty in the early sixteenth century, when the last successor of Timur, Babar, extended his rule from Kabul to India to found the Mughal Empire. Under the patronage of the Mughals, Indian craftsmen adopted Persian techniques and designs. Carpets woven in the Punjab made use of motifs and decorative styles found in Mughal architecture.
Akbar, a Mogul emperor, is accredited to introducing the art of carpet weaving to India during his reign. The Mughal emperors patronized Persian carpets for their royal courts and palaces. During this period, he brought Persian craftsmen from their homeland and established them in India. Initially, the carpets woven showed the classic Persian style of fine knotting. Gradually it blended with Indian art. Thus the carpets produced became typical of the Indian origin and gradually the industry began to diversify and spread all over the subcontinent.
During the Mughal period, the carpets made on the Indian subcontinent became so famous that demand for them spread abroad. These carpets had distinctive designs and boasted a high density of knots. Carpets made for the Mughal emperors, including Jahangir and Shah Jahan, were of the finest quality. Under Shah Jahan's reign, Mughal carpet weaving took on a new aesthetic and entered its classical phase.
The Indian carpets are well known for their designs with attention to detail and presentation of realistic attributes. The carpet industry in India flourished more in its northern part with major centres found in Kashmir, Jaipur, Agra and Bhadohi.
Indian carpets are known for their high density of knotting. Hand-knotted carpets are a speciality and widely in demand in the West. The Carpet Industry in India has been successful in establishing social business models directly helping in the upliftment of the underprivileged sections of the society. Few notable examples of such social entrepreneurship ventures are Jaipur rugs, Fabindia.
Another category of Indian rugs which, though quite popular in most of the western countries, have not received much press is hand-woven rugs of Khairabad (Citapore rugs).[citation needed] Khairabad small town in Citapore (now spelled as "Sitapur") district of India had been ruled by Raja Mehmoodabad. Khairabad (Mehmoodabad Estate) was part of Oudh province which had been ruled by shi'i Muslims having Persian linkages. Citapore rugs made in Khairabad and neighbouring areas are all hand-woven and distinct from tufted and knotted rugs. Flat weave is the basic weaving technique of Citapore rugs and generally cotton is the main weaving material here but jute, rayon and chenille are also popular. Ikea and Agocha have been major buyers of rugs from this area.
TIBETAN RUG
Tibetan rug making is an ancient, traditional craft. Tibetan rugs are traditionally made from Tibetan highland sheep's wool, called changpel. Tibetans use rugs for many purposes ranging from flooring to wall hanging to horse saddles, though the most common use is as a seating carpet. A typical sleeping carpet measuring around 3ftx5ft (0.9m x 1.6m) is called a khaden.
The knotting method used in Tibetan rug making is different from that used in other rug making traditions worldwide. Some aspects of the rug making have been supplanted by cheaper machines in recent times, especially yarn spinning and trimming of the pile after weaving. However, some carpets are still made by hand. The Tibetan diaspora in India and Nepal have established a thriving business in rug making. In Nepal the rug business is one of the largest industries in the country and there are many rug exporters. Tibet also has weaving workshops, but the export side of the industry is relatively undeveloped compared with Nepal and India.
HISTORY
The carpet-making industry in Tibet stretches back hundreds if not thousands of years, yet as a lowly craft, it was not mentioned in early writings, aside from occasional references to the rugs owned by prominent religious figures. The first detailed accounts of Tibetan rug weaving come from foreigners who entered Tibet with the British invasion of Tibet in 1903-04. Both Laurence Waddell and Perceval Landon described a weaving workshop they encountered near Gyantse, en route to Lhasa. Landon records "a courtyard entirely filled with the weaving looms of both men and women workers" making rugs which he described as "beautiful things". The workshop was owned and run by one of the local aristocratic families, which was the norm in premodern Tibet. Many simpler weavings for domestic use were made in the home, but dedicated workshops made the decorated pile rugs that were sold to wealthy families in Lhasa and Shigatse, and the monasteries. The monastic institutions housed thousands of monks, who sat on long, low platforms during religious ceremonies, that were nearly always covered in hand-woven carpets for comfort. Wealthier monasteries replaced these carpets regularly, providing income, or taking gifts in lieu of taxation, from hundreds or thousands of weavers.
From its heyday in the 19th and early 20th century, the Tibetan carpet industry fell into serious decline in the second half of the 20th. Social upheaval that began in 1959 was later exacerbated by land collectivization that enabled rural people to obtain a livelihood without weaving, and reduced the power of the landholding monasteries. Many of the aristocratic families who formerly organized the weaving fled to India and Nepal during this period, along with their money and management expertise.
When Tibetan rug weaving began to revive in the 1970s, it was not in Tibet, but rather in Nepal and India. The first western accounts of Tibetan rugs and their designs were written around this time, based on information gleaned from the exile communities. Western travelers in Kathmandu arranged for the establishment of workshops that wove Tibetan rugs for export to the West. Weaving in the Nepal and India carpet workshops was eventually dominated by local non-Tibetan workers, who replaced the original Tibetan émigré weavers. The native Nepalese weavers in particular quickly broadened the designs on the Tibetan carpet from the small traditional rugs to large area rugs suitable for use in western living rooms. This began a carpet industry that is important to the Nepalese economy even to this day, even though its reputation was eventually tarnished by child labor scandals during the 1990s.
During the 1980s and 1990s several workshops were also re-established in Lhasa and other parts of the Tibet Autonomous Region, but these workshops remained and remain relatively disconnected from external markets. Today, most carpets woven in Lhasa factories are destined for the tourist market or for use as gifts to visiting Chinese delegations and government departments. Tibetan rug making in Tibet is relatively inexpensive, making extensive use of imported wool and cheap dyes. Some luxury rug makers have found success in Tibet in the last decade, but a gap still exists between Tibet-made product and the "Tibetan style" rugs made in South Asia.
WIKIPEDIA
A nuclear device is detonated at Eniwetok Atoll in the Marshall Islands in 1952.
Credit: US Government
AquaStar Plus! UV Water Treatment Device
UV in a bottle
AquaStar was designed to be sold to a high-end market to fund a lower-cost application in the developing world. The more expensive AquaStar Plus! is used in the harshest environments by travelers, military personnel, and rescue workers. Unsafe water is placed in the bottle and exposed to UV-C light, which damages the DNA and RNA in the pathogens, rendering them non-infective. AquaStar Flow Through treats water in larger batches. A small water-purification service can generate income while helping out the community.
other90.cooperhewitt.org/design/aquastar-plus-and-flow-th...
www.uvaquastar.com/skins/2008Style/standard2.aspx?elid=20...
Design for the Other 90%
February 17 – May 29, 2009
"Of the world’s 6.5 billion people, 90 percent have little or no access to most of the products and services many of us take for granted. In fact, nearly half do not have reliable access to food, clean water, healthcare, education, affordable transportation, or shelter. The exhibition Design for the Other 90% features more than 30 projects that reflect a growing movement among designers, engineers, and social entrepreneurs to create low-cost solutions for everyday problems. Through local and global partnerships, individuals and organizations are finding unique ways to address the basic challenges of survival and progress faced by the world’s poor.
Design for the Other 90% showcases designs that incorporate new and traditional materials, and abandoned and emerging technologies to solve myriad problems—from cleaner-burning sugarcane charcoal to a solar-rechargeable battery for a hearing aid, from a portable water-purification straw to a low-cost laptop. By understanding the available resources and tools as well as the lives and needs of their potential users, these designers create simple, pragmatic objects and ingenious, adaptive systems that can help transform lives and communities.
FIND OUT MORE
Watch a video blog.cooperhewitt.org/2007/05/14/in-their-own-words about the exhibition and discuss the designs in the exhibition.
Visit the exhibition web site other90.cooperhewitt.org/ to learn more about the designs on view."
Martin-Baker Mk.7 = Rocket assisted, ejection seat.
Operating either the seat pan or face blind firing handles initiates aircraft canopy jettison, as the canopy clears an interlock is removed which allows the main gun located at the rear of the seat to fire, the main gun is a telescopic tube with two explosive charges that fire in sequence.
As the seat moves up its guide rails an emergency oxygen supply is activated and personal equipment tubing and communication leads are automatically disconnected, leg restraints also operate.
As the seat moves further up and out of the aircraft the rocket pack is fired by a lanyard attached to the cockpit floor. A steel rod, known as the drogue gun, is fired and extracts two small parachutes to stabilise the seat's descent path.
A barostatic mechanism prevents the main parachute from opening above an altitude of 10,000 ft (3,000 m). A time delay mechanism operates the main parachute below this altitude in conjunction with another device to prevent the parachute opening at high speed.
The seat then separates from the occupant for a normal parachute descent, a manual separation handle is provided should the automatic system fail.
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VF-14 (U.S. Navy)
The Strike Fighter Squadron 14 (VF-14) Tophatters; are a United States Navy fighter attack squadron based at Naval Air Station Lemoore.
On 10 August 1990, eight days after the Iraqi invasion of Kuwait, the John F. Kennedy was ordered to emergency deploy to the Red Sea aboard the Kennedy to take part in Operation Desert Shield. During the months leading up to the war, the Tophatters played an integral role in enforcing the Iraqi embargo flying Combat Air Patrol and standing alert duty continuously.
On the morning of 17 January 1991, the Tophatters once again flew into combat when they joined United Nations forces in the air assault on Iraq. VF-14 and VF-32 flew Combat Air Patrol and Fighter Escort missions for CVW-3 strike and support aircraft throughout Desert Storm operating in Western and Central Iraq initially and then conducting long range barrier CAP missions in eastern Iraq near the Iranian border.with other Tomcat squadrons from the Red Sea and the Persian Gulf that lasted an unprecedented 7–8 hours. After combat operations ended, the Kennedy remained briefly in the Red Sea stopping off the coast of Egypt for a port call before returning to NAS Oceana after eight months at sea.
In December 1991, VF-14 became one of the first squadrons to begin training for the Tomcat's new air-to-ground mission. After low altitude flight training and several strike-related schools, the Tophatters put their new skills to the test during Air Wing work-ups in Fallon, Nevada.
VF-14 F-14 tail markings
In October 1992, the Tophatters again headed east for a Mediterranean deployment. Once past the Rock of Gibraltar, VF-14 began flying air superiority and reconnaissance missions in the Adriatic Sea in support of UN policies in the former Yugoslavia. During this deployment, the Tophatters also participated in several highly successful exercises with Egypt, Morocco and Turkey, while continuing to support operations off the coast of the former Yugoslavia and Operation Provide Comfort in Iraq.
In 1995, the Tophatters were the test bed for the Tomcat air-to-ground rockets program. The Tophatters, which like to call themselves the Oldest and the Boldest; were awarded the Fighter Fling Banner Blaster award for their superior performance in the air-to-air gunnery arena.
In late 1995, the squadron was detached from CVW-3 when the Navy began reducing the number of Tomcat squadrons to carrier air wings from two to one and retaining the TARPS capable squadrons. As a non-TARPS squadron, VF-14 was originally slated for disestablishment and temporarily assigned to Fighter Wing One at NAS Oceana. The following year saw much uncertainty for many Tomcat squadrons, but a grassroots campaign to continue the lineage of the Navy's oldest squadron was successful in saving the Tophatters from extinction and the squadron was assigned to Carrier Air Wing 8, which was losing VF-84, with sister squadron VF-41.
In January 1996, the Tophatters once again rejoined the John F. Kennedy. In March, the squadron deployed on the John C. Stennis. June took the Tophatters on a 40-day cruise aboard the Kennedy to Ireland and England. Next, VF-14 visited the Mediterranean and other areas.
Airframe Info
Manufacturer: Grumman
Model: F-14A Tomcat
Year built: 0000
Construction Number (C/N): 208
Aircraft Type: Fixed wing multi engine
Number of Seats: 2
Number of Engines: 2
Engine Type: Turbofan
Engine Manufacturer and Model: Pratt & Whitney TF30-P-412A
Aircraft Registration Number: 159848
Alternative Code/Name: AJ-212
Current Status: Preserved Owner
Owner: Tillamook Air Museum
Address: Tillamook, Oregon, United States
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In January 1974, after four highly successful Mediterranean deployments, the squadron transitioned to the Navy's newest fighter, the Grumman F-14A Tomcat at NAS Miramar and was teamed with VF-32 as the first two Tomcat squadrons to arrive at NAS Oceana.
In June 1975 the Tophatters became the first Atlantic squadron to deploy with the F-14A alongside VF-32 aboard John F. Kennedy.
In October 1978, the Tophatter aircrew set an all-time F-14 flight hour record when they flew 977 hours in one month while deployed in the Mediterranean.
In 1976, VF-14 launched the 100th AIM-54 Phoenix missile against a simulated cruise missile at a range of 32 miles (51 km), killing it at a range of 65 miles (105 km) from John F. Kennedy. During the same cruise, VF-14 intercepted a Soviet Tu-95 on 21 July. VF-14 escorted the bomber for around 45 minutes, during which the Soviet bomber made two passes over the Kennedy.
SoulRider.222 / Eric Rider ©
VF-14 Tophatters AJ201
Fighter Squadron 14 (FITRON 14)
VF-14 ‘Tophatters’
F-14A Tomcat (VF-14 / CVW-3) USS John F. Kennedy (CV 67)
Grumman F-14A Tomcat (1974-2001)
Established as Pacific Fleet Air Detachment on September 1, 1919
redesignated Torped & Bombing Squadron VT-5 on September 7, 1920
redesignated Patrol Squadron VP-4-1 on September 7, 1921
redesignated Fighting Squadron VF-4 on September 23, 1921
redesignated VF-1 on July 1, 1922
redesignated VF-1B High Hatters on July 1, 1927
redesignated Bombing Squadron VB-2B on July 1, 1934
redesignated VB-3 on July 1, 1937
redesignated VB-4 on July 1, 1939
redesignated Scouting Squadron VS-41 on March 15, 1941
(renamed Tophatters in 1942)
redesignated VB-41 on March 1, 1943
redesignated VB-4 on August 4, 1943
redesignated Attack Squadron VA-1A on November 15, 1946
redesignated VA-14 on August 2, 1948
redesignated VF-14 on December 15, 1949
redesignated VFA-14 on December 1, 2001
Nickname: High Hatters (1927-42) / Tophatters (1942-2001)
Early years
The Tophatters began carrier operations on board the Navy's first aircraft carrier Langley in 1926. The squadron, then designated Fighter Plane Squadron One, set the record for carrier landings in a single day. Flying the TS-1, they logged 127 traps by the end of flight operations.
In 1929 the squadron was assigned to Saratoga, where it began as a fighter squadron and transitioned to a bomber squadron. Throughout the 1930s, the Tophatters flew the FB-5, F2B, F4B, F11C Goshawk, SBC Helldiver and the SB2U-1 Vindicator. In 1939, while flying the Vindicator, the Tophatters were transferred to the Atlantic Fleet and Ranger.
1940s
The Tophatters proved to be formidable foes during World War II. While on Ranger, the squadron provided air support for the invasion of North Africa in November 1942. During the four days of 8 November – November 11, the pilots destroyed 16 enemy aircraft. Flying the SBD Dauntless dive bomber, the squadron participated in the first American naval air strike against German forces in Norway's inner channel.
In November 1944, the squadron transferred to the Pacific Fleet, and participated in the Leyte Campaign while attached to Bunker Hill. After transferring to Essex, the squadron bombed fortifications on Formosa in January 1945, supported the assault on Iwo Jima in February, participated in the first naval carrier strike on Tokyo, and completed Pacific combat operations with strikes on Okinawa in early March 1945.
After the war's end VB-4 made four cruises aboard USS Tarawa (CV-40), including a world cruise between 28 September 1948 and 21 February 1949, after which the squadron was based on the U.S. East Coast. On 15 November 1946 VB-4 became Attack Squadron 1A (VA-1A), and in August 1948 the squadron was again redesignated Attack Squadron 14 (VA-14) and transitioned from the SB2C-5 to the Vought F4U-4 Corsair. In December 1949 VA-14 was redesignated Fighter Squadron 14 (VF-14).
1950s
In 1951 and 1952 VF-14 made two deployments to the Mediterranean Sea aboard the modernized USS Wasp (CV-18), still flying the F4U. In 1954 VF-14 took on the role of all-weather interceptor when they transitioned to the Douglas F3D-2 Skyknight, but only made a three-months deployment aboard USS Intrepid (CVA-11) in late 1954. As the F3D proved unsuitable for carrier operations, the squadron transitioned to the McDonnell F3H-2N Demon in 1955. VF-14 made two deployments aboard USS Forrestal (CVA-59) in 1957. The squadron was then re-equipped with F3H-2s. VF-14 and its parent CVG-1 were then re-assigned to the USS Franklin D. Roosevelt (CVA-42) and made eight deployments to the Mediterranean Sea up to 1969.
1960s
In May 1963, the Tophatters transitioned to the McDonnell F-4B Phantom II and on 23 January 1964 they became the first Phantom squadron to operate on board the FDR. In June 1966, after moving to NAS Oceana, the Tophatters deployed to the South China Sea to conduct air strikes and support missions against military targets in North Vietnam. During this combat deployment, the squadron flew 1,688 hours on 967 combat sorties and delivered 651,624 pounds of ordnance, in addition to flying its traditional combat air patrol and fighter escort missions. The squadron distinguished itself in Olongapo and stories are still told among jeepney drivers attesting to the group's prowess in downing Mojos and San Magoo. When the FDR entered the Norfolk Naval Shipyard for a modernization, CVW-1 and VF-14 were re-assigned to the USS John F. Kennedy (CVA-67) in 1969 and stayed with the JFK for nine deployments until 1982.
1970s
In January 1974, after four highly successful Mediterranean deployments, the squadron transitioned to the Navy's newest fighter, the Grumman F-14A Tomcat at NAS Miramar and was teamed with VF-32 as the first two Tomcat squadrons to arrive at NAS Oceana. In June 1975 the Tophatters became the first Atlantic squadron to deploy with the F-14A alongside VF-32 aboard John F. Kennedy. In October 1978, the Tophatter aircrew set an all-time F-14 flight hour record when they flew 977 hours in one month while deployed in the Mediterranean.
In 1976, VF-14 launched the 100th AIM-54 Phoenix missiles against a simulated cruise missile at a range of 32 miles (51 km), killing it at a range of 65 miles (105 km) from John F. Kennedy. During the same cruise, VF-14 intercepted a Soviet Tu-95 on 21 July. VF-14 escorted the bomber for around 45 minutes, during which the Soviet bomber made two passes over the Kennedy.
1980s
In August 1980, the Tophatters deployed to the Mediterranean Sea on the Kennedy. During this deployment, VF-14 won the Silver Anchor Award and the Battle "E" Award for combat readiness, for the second year in a row. The achievements that contributed to the awards included 3 missile firing exercises with a 100% kill ratio, first East Coast TCS installations and 26.500 accident free flying hours over the space of 8 years.
In June 1982 VF-14 was re-assigned to Carrier Air Wing 6 aboard the USS Independence (CV-62), and in July was named the "Best Fighter Squadron" for superb performance in the Fleet Fighter Air Combat Readiness Program (FFARP).
October and early November 1983 found the Tophatters logging more combat time in support of Operation Urgent Fury in Grenada. After playing an integral part in the liberation of Grenada from Cuban insurgents, VF-14 proceeded east to the Mediterranean to participate in contingency operations off the coast of Lebanon. In early December 1983, the Tophatters were again called upon to provide combat air support for the elements of the multi-national forces in Beirut.
On 1 April 1985, the Tophatters returned to the Kennedy, where they spent the rest of the year on a turnaround-training schedule, which included eleven detachments to various parts of the United States and Canada. Although again aboard the JFK, VF-14 was now assigned to Carrier Air Wing 3.
On 18 April 1986, the Tophatters departed for the Mediterranean once again and were extended on deployment due to the Lebanese hostage crisis. Upon their return to the United States, the Tophatters were again proclaimed the "Best Fighter Squadron" by winning the 1987 FFARP award.
In 1989, VF-14 was presented with the "Grand Slam" award in recognition of their perfect missile firing record. The squadron entered 1990 conducting workups for deployment and making portcalls in Portland, Mayport, New York City and Boston. During exercises off Puerto Rico, the Tophatters operated against French Super Etendard and F-8 Crusaders from the French Aircraft Carrier Foch (R 99).
1990s
On 10 August 1990, eight days after the Iraqi invasion of Kuwait, the John F. Kennedy was ordered to emergency deploy to the Red Sea aboard the Kennedy to take part in Operation Desert Shield. During the months leading up to the war, the Tophatters played an integral role in enforcing the Iraqi embargo flying Combat Air Patrol and standing alert duty continuously. On the morning of 17 January 1991, the Tophatters once again flew into combat when they joined United Nations forces in the air assault on Iraq. VF-14 and VF-32 flew Combat Air Patrol and Fighter Escort missions for CVW-3 strike and support aircraft throughout Desert Storm operating in Western and Central Iraq initially and then conducting long range barrier CAP missions in eastern Iraq near the Iranian border with other Tomcat squadrons from the Red Sea and the Persian Gulf that lasted an unprecedented 7–8 hours. After combat operations ended, the Kennedy remained briefly in the Red Sea stopping off the coast of Egypt for a portcall before returning to NAS Oceana after eight months at sea.
In December 1991, VF-14 became one of the first squadrons to begin training for the Tomcat's new air-to-ground mission. After low altitude flight training and several strike-related schools, the Tophatters put their new skills to the test during Air Wing work-ups in Fallon, Nevada.
In October 1992, the Tophatters again headed east for a Mediterranean deployment. Once past the Rock of Gibraltar, VF-14 began flying air superiority and reconnaissance missions in the Adriatic Sea in support of UN policies in the former Yugoslavia. During this deployment, the Tophatters also participated in several highly successful exercises with Egypt, Morocco and Turkey, while continuing to support operations off the coast of the former Yugoslavia and Operation Provide Comfort in Iraq.
In 1995, the Tophatters were the test bed for the Tomcat air-to-ground rockets program. The Tophatters, which like to call themselves the "Oldest and the Boldest," were awarded the Fighter Fling Banner Blaster award for their superior performance in the air-to-air gunnery arena.
In late 1995, the squadron was detached from CVW-3 when the Navy began reducing the number of Tomcat squadrons to carrier air wings from two to one and retaining the TARPS capable squadrons. As a non-TARPS squadron, VF-14 was originally slated for disestablishment and temporarily assigned to Fighter Wing One at NAS Oceana. The following year saw much uncertainty for many Tomcat squadrons, but a grassroots campaign to continue the lineage of the Navy's oldest squadron was successful in saving the Tophatters from extinction and the squadron was assigned to Carrier Air Wing 8, which was losing VF-84, with sister squadron VF-41.
In January 1996, the Tophatters once again rejoined the John F. Kennedy. In March, the squadron deployed on the John C. Stennis. June took the Tophatters on a 40-day cruise aboard the Kennedy to Ireland and England. Next, VF-14 visited the Mediterranean and other areas.
During March 1998, VF-14 changed its home to the nuclear-powered aircraft carrier the Theodore Roosevelt. In 1999, the Tophatters were involved in NATO's Operation Allied Force and in Operation Southern Watch.
2000s
In April 2001, VF-14 embarked on their final F-14 cruise on board USS Enterprise (CVN-65), supporting Operation Southern Watch and Operation Enduring Freedom. As the carrier headed for home and on its way to South Africa they were given order to head to the North Persian Gulf after the September 11 attacks. The USS Enterprise/CVW-8 had been elected to be the night carrier during OEF and thus didn't see action until 8 October, VF-14 attacked a radar warning installation near Kabul during CVW-8's initial strike, which had been envisioned to have a section of F/A-18s, a section of F-14s from VF-14 and an EA-6B from VAQ-141, but due to insufficient fuel available for the Hornets, only the F-14s and the EA-6B pressed on. After their return to the US in November, VF-14 had dropped 173,324 lbs of ordnance (174 laser-guided bombs), VF-14 also buddy-lased 28 AGM-65 and 23 laser-guided bombs.
After their last F-14 cruise VF-14 and VF-41 relocated to NAS Lemoore and began the transition to the F/A-18 Super Hornet switching to CVW-11 and USS Nimitz (CVN-68).