View allAll Photos Tagged Discretization
An expansive multidisciplinary collaboration between mathematicians, dancers, media artists, composers, and engineers, this complex experimental augmented reality performance is truly the first of its kind. This newest dance performance probes the circuitry connecting the corporeal to the cognitive, questioning the very essence of humanity and machine. Alan Turing is often called the father of modern computing. He was a brilliant mathematician and logician. He developed the idea of the modern computer and artificial intelligence Turing thus gave birth to one physical incarnation of mathematics. His creations are the embodiment of the act of performing mathematics. Although his contemporaries would see a sharp delineation between human and machine, in his eyes, his progeny did not constitute a distant “other”. Rather, he was the father of a “living machine.” How might mathematics manifest itself as physical expression? What binds human cognition and philosophy to a human being’s body? How might this connection dissolve or transform in time? The full-length show follows the emergence of mathematics in relationship to the human body, exploring perception and our physical modes of expression through a complex set of emerging technologies.
Event Link:
grayarea.org/event/discretefigures-rhizomatiks-research-e...
I tried to discretely take this shot. He saw me, and didn't seem too happy to be photographed. I said "m'goi" and ran in a jiffy!
Medium and coarse angular blocky soil peds from an argillic horizon.
Peds are aggregates of soil particles formed as a result of pedogenic processes; this natural organization of particles forms discrete units separated by pores or voids. The term is generally used for macroscopic (visible; i.e. greater than 1 mm in size) structural units when observing soils in the field. Soil peds should be described when the soil is dry or slightly moist, as they can be difficult to distinguish when wet.
In blocky structure, the structural units are blocklike or polyhedral. They are bounded by flat or slightly rounded surfaces that are casts of the faces of surrounding peds. Typically, blocky structural units are nearly equidimensional but grade to prisms and to plates. The structure is described as angular blocky if the faces intersect at relatively sharp angles; as subangular blocky if the faces are a mixture of rounded and plane faces and the corners are mostly rounded. Blocky structures are common in subsoil but also occur in surface soils that have a high clay content. The strongest blocky structure is formed as a result of swelling and shrinking of the clay minerals which produce cracks. Sometimes the surface of dried-up sloughs and ponds shows characteristic cracking and peeling due to clays.
There are five major classes of macrostructure seen in soils: platy, prismatic, columnar, granular, and blocky. There are also structureless conditions. Some soils have simple structure, each unit being an entity without component smaller units. Others have compound structure, in which large units are composed of smaller units separated by persistent planes of weakness.
For more information about describing and sampling soils, visit:
www.nrcs.usda.gov/resources/guides-and-instructions/field...
or Chapter 3 of the Soil Survey manual:
www.nrcs.usda.gov/sites/default/files/2022-09/The-Soil-Su...
For additional information on "How to Use the Field Book for Describing and Sampling Soils" (video reference), visit:
Proyecto de intervención Biblioteca Fundadores Gimnasio Moderno Bogotá / Intervention Project Founders Library Bogotá Modern Gym 2011
An expansive multidisciplinary collaboration between mathematicians, dancers, media artists, composers, and engineers, this complex experimental augmented reality performance is truly the first of its kind. This newest dance performance probes the circuitry connecting the corporeal to the cognitive, questioning the very essence of humanity and machine. Alan Turing is often called the father of modern computing. He was a brilliant mathematician and logician. He developed the idea of the modern computer and artificial intelligence Turing thus gave birth to one physical incarnation of mathematics. His creations are the embodiment of the act of performing mathematics. Although his contemporaries would see a sharp delineation between human and machine, in his eyes, his progeny did not constitute a distant “other”. Rather, he was the father of a “living machine.” How might mathematics manifest itself as physical expression? What binds human cognition and philosophy to a human being’s body? How might this connection dissolve or transform in time? The full-length show follows the emergence of mathematics in relationship to the human body, exploring perception and our physical modes of expression through a complex set of emerging technologies.
Event Link:
grayarea.org/event/discretefigures-rhizomatiks-research-e...
The Essex Skipper forms discrete colonies that vary from a small number of individuals to several thousand. Where it occurs it can therefore be very common. This species is very similar in appearance to the Small Skipper and, because of this similarity, was not recognised as a separate species until 1889. The male is distinguished from the female by the sex brand on its forewings, which is a short line of specialised scent scales. Despite its name, the Essex Skipper is now found over much of the southern half of England and it was first recorded in Wales in 2000 and in Wexford in south-east Ireland in 2006. On the British mainland it is to generally be found south of a line between Dorset and North Lincolnshire. It is believed that the increase in distribution is being assisted by the steep and grass-covered embankments that are often found on motorways and major trunk roads which acted as corridors - allowing this species to reach new locations more easily.
On Saturday November 29, 2024. I went to Saint-Bonnet-de-Mûre, near Lyon, France for the last monthly meeting of camera collectors. I found there a stunning lens AF-Nikkor 1:1.8 f=85mm for my Nikon F4 (year 1989). There was also the same lens in the "D" version appeared in 1995 with the Nikon F5. "D" stands for "Distance" that is coded in this Nikkor lenses series and used for the 3D-matrix metering of the Nikon F5. I choose better the non-"D" significantly less expensive and that match better with the period of my Nikon F4 body. I found also a nice small Nikon shoulder bag all black, that I found discrete enough to carry the heavy and massive Nikon F4 that weight more than a medium-format camera.
After detailing the lens and checking the correct functioning fitted to the camera, I loaded on Monday December 2, 2024 an
Ilford HP5+ with the DX coded nominal 400 ISO film sensitivity. Due to some other businesses that took longer than expected, I had to wait a couple of days before going quietly to the "Parc de la Tête d'Or" for testing the lens.
The AF Nikkor lens 1:1.8 f=85mm was fitted with a protective Hoya Skylight (1A) 62mm screw-on filter plus its dedicated Nikon HN-23 metal shade hood. For focusing I used either the single autofocus mode or the manual mode on complicated scenes inside the tropical green houses. As for my medium-format sessions, I took a bit of time to note on a session ticket the main parameters (shutter speed, aperture, focusing distance, flash control mode, etc). When indicated, I used also my Nikon Speedlight SB-26 in the TTL mode.
Documentary smartphone picture
December 2, 2024
69006 Lyon
France
After completion at view 37, the film was rewound using the rewinding motor (lever R1 then lever R2). During the film rewind (manual or auto) the view counter decrements and I switched-off the R2 lever just arrived at -2 to keep the leader out of the cartridge. I then processed the film developed using 300 mL of Adox Adonal (Agfa Rodinal) developer prepared at the dilution 1+25 for 6min at 20°C.
Digitizing was made using a Sony A7 camera (ILCE-7, 24MP) held on a Minolta Auto Bellows with the Minolta slide duplication accessory and Minolta Macro Bellow lens 1:3.5 f=50mm. The light source was a LED panel CineStill Cine-lite.
The RAW files obtained were inverted within the latest version available of Adobe Lightroom Classic (version 14) and edited to the final jpeg pictures without intermediate file. They are presented either as printed files with frame or the full size JPEG's together with some documentary smartphone color pictures.
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About the camera :
Maybe it would have been better not to ask for this question: « what’s new do you have at the moment?» to my local photo store, because Christine grab underneath the counter, stating « I have that … » . What a beast ! A Nikon F4 in the exact state of the Nikon brochure year 1990, presented with the standard AF Nikkor 1:1.4 f=50mm. I was already hooked by the machine. After two days, I decided to buy it even with some little common issues found on early Nikon F4 (see below), fortunately not affecting the whole, numberous functions of this incredibly complex professional SLR of the year 1990’s.
Nikon F4 came to the market on September 1988 starting with the serial number 2.000.000. Fully manufactured in Japan (modules came from 3 different Nikon factories) the F4's were assembled in Mito, Ibaraki (North to Tokyo) Nikon plant (no more in the mother factory of Tokyo Oi like the Nikon’s F). When I lived in Tokyo in 1990-1991, Nikon F4 was the top-of-the-line of Nikon SLR camera’s. I saw it in particular in Shinjuku Bic Camera store when I bought there, in December 1990 my Nikonos V.
Nikon F4 incorporates many astonishing engineering features as the double vertical-travel curtain shutter capable of the 1/8000s. Compared to the Nikon F3, the F4 was an AF SLR operated by a CCD sensor (200 photo sites). The film is automatically loaded, advanced with to top speed of 5,7 frame/s !! With the MB-21 power grip (F4s version). The F4 is a very heavy camera (1.7kg with the AF Nikkor 1.4/50mm), incredibly tough and well constructed. This exemplary is devoid of any scratches or marks, and in a condition proving that it was not used for hard professional appliances, for those it was however intended. The camera has still it original Nikon neck strap, the original user manual in French. The lens is protected by a Cokin (Franc) Skylight 1A 52mm filter and the original Nikon front cap. The two small LCD displays (one on the F4 body, one in the DP-20 finder) are both affected by the classical syndrome of « bleeding ». Fortunately, all information could still be read. One says that 70% of the early Nikon F4 suffer from this problem but also found on other models.
According its serial number and the production rate of about 5000 units/month, this Nikon F4s was probably manufactured in Mito, Ibaraki, Japan in May 1989.
The camera was exported abroad thereafter attested by the presence of the golden oval little sticker("Passed" on the DP-20 viewfinder. In order to certify the quality production, two Japanese organizations, the Japan Camera Industry Institute (JCII) and the Japan Machinery Design Center (JMDC), joined forces to verify and mark the conformity of products for the foreign market. This is how, between the 1950s and 1980s, this famous little gold sticker was affixed, with the legendary "Passed", meaning that the device had been checked. Finally, when we say that the device had been checked, the production line had been checked because each device could not be checked individually.
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About the flash :
I received from a German seller for 50€ this Nikon Speedlight electronic flash SB-26 that was, at the time of Nikon F4, the most powerful dedicated Nikon flash (Guide Number 36 at full power and 100 ISO).
The SB-26 communicates with the Nikon F4 body (and many other Nikon camera's) and can be operated in many different modes including TTL real-time metering with automatic equilibration of the ambient light using the 5-zone matrix metering done by the DP-20 photometric viewer as well in the center-weighted mode. Other possibilities include the normal TTL mode, an Auto mode using the own sensor of the flash and a manual mode with 7 power levels.
The flash head can cover the optical field from super-wide angle lenses 18-20mm, wide-angle lenses 28mm and 35mm, normal lenses 50mm, and long-focal lenses at 70mm and 85mm. The head can be rotated according two axis for indirect lightening. In addition, the SB-26 has a special focusing aid for the Nikon F4 autofocus system, projecting in the the darkness a red focusing image. SB-23 flash can be also used as master or slave flash in a coordinated flash system.
The flash requires 4 AA alkaline cells for approximately 100 lights at full power and much more with energy recycling at lower power levels.
An expansive multidisciplinary collaboration between mathematicians, dancers, media artists, composers, and engineers, this complex experimental augmented reality performance is truly the first of its kind. This newest dance performance probes the circuitry connecting the corporeal to the cognitive, questioning the very essence of humanity and machine. Alan Turing is often called the father of modern computing. He was a brilliant mathematician and logician. He developed the idea of the modern computer and artificial intelligence Turing thus gave birth to one physical incarnation of mathematics. His creations are the embodiment of the act of performing mathematics. Although his contemporaries would see a sharp delineation between human and machine, in his eyes, his progeny did not constitute a distant “other”. Rather, he was the father of a “living machine.” How might mathematics manifest itself as physical expression? What binds human cognition and philosophy to a human being’s body? How might this connection dissolve or transform in time? The full-length show follows the emergence of mathematics in relationship to the human body, exploring perception and our physical modes of expression through a complex set of emerging technologies.
Event Link:
grayarea.org/event/discretefigures-rhizomatiks-research-e...
An expansive multidisciplinary collaboration between mathematicians, dancers, media artists, composers, and engineers, this complex experimental augmented reality performance is truly the first of its kind. This newest dance performance probes the circuitry connecting the corporeal to the cognitive, questioning the very essence of humanity and machine. Alan Turing is often called the father of modern computing. He was a brilliant mathematician and logician. He developed the idea of the modern computer and artificial intelligence Turing thus gave birth to one physical incarnation of mathematics. His creations are the embodiment of the act of performing mathematics. Although his contemporaries would see a sharp delineation between human and machine, in his eyes, his progeny did not constitute a distant “other”. Rather, he was the father of a “living machine.” How might mathematics manifest itself as physical expression? What binds human cognition and philosophy to a human being’s body? How might this connection dissolve or transform in time? The full-length show follows the emergence of mathematics in relationship to the human body, exploring perception and our physical modes of expression through a complex set of emerging technologies.
Event Link:
grayarea.org/event/discretefigures-rhizomatiks-research-e...