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This interior view of the Variable Density Tunnel (VDT) at the NACA's Langley Laboratory, taken shortly after it opened in 1922, looks downstream. Note the wooden construction, the propeller in the background and the observation windows. These windows aligned with small portholes in the pressure shell.
Credit: NASA
Image Number: L-405
Date: Circa 1926
Population density measures the number of persons per square kilometer of land area. The data are gridded at a resolution of 30 arc-seconds.
Our capital Male' is the city which has highest population density. Hence there is an over population of bikes as well.
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Technical Details
Exposure: 20 Seconds Aperture: f/16.0 Focal Length: 18 mm ISO Speed: 200
Nikon D40x, Nikkor 18-55mm f/3.5-5.6G ED AF-S DX
© Camilo Bonilla. All Rights Reserved. No usage allowed including copying or sharing without written permission.
(L-463): This exterior view of Langley's Variable Density Tunnel's shows its drive motor at left, a portion of the air compressor piping in the foreground, and an operator seated at the control panel on the right.
Credit: NASA
Image Number: L-463
Date: January 25, 1923
Population density measures the number of persons per square kilometer of land area. The data are gridded at a resolution of 30 arc-seconds.
Camera: Pentax K10D
Lens: Sigma 10-20mm
Neutral Density HDR. Using a B+W 3.0 ND Filter
Shot right at the sun, I have soooo much dirt on my lens. Was tricky navigating this shot and the tide that wold come in and cover the rocks. This was taken with 4 exposures. I really like how the sun reflects of the moss and water. Have a ND filter was key for this shot to get the very cool movement in the water.
A graph showing the increase in the number of animals per area unit in different regions between 1961 and 2011.
These high rises were all over Shanghai and Beijing. From talking to people, I believe that most of these buildings have no elevators, central heating or AC. Laundry is done by hand in the sink, and hung to air dry. A scene from Blade Runner?
Size: 200x50x20mm weight: XXXgr.
Density: X,XXgr./cm³ / Estimated grit size: medium - fine > 4-8K
Usage: can be used with water, glycerine and oil
Colour: appears different, sometimes with a more pronounced BBW pattern but tending towards wine red, sometimes more violet with a certain banding and swirling, stone easily auto slurries
General Information on Pierre Lorraine Rouge / Rouge Du Salm:
Firstly extensive explained and named from Henk Bos in his Grinding and Honing Part 4 about Belgian Waterwhetstones. Henks statement was that the stones beeing sold as Lorraine Stones are the same stones which were earlier known from the Belgium Quarries as Rouge Du Salm / Engl.: Salm Rouge. They have been extracted from the layers called Veine Lorraine or Veine Rouge Du Salm.
The Rouge Du Salm / Salmon Rouge appears as a special layer within GBB/BBW Layers and can be identified due to its color and behavier when honing. The color tends to go into a wine red or a darker violet and less into blue. The stones also work quite fast with a thick slurry and a bit pressure and can be used in a lower progression (>4K) up to finishing with plain water into the area of (>8K).
About this stone:
As i already got several of the stones i had the chance to compare each of the individual stones. Actually this example is the first one letting me to underline or confirm the statement Henk has given before. One of the sides shows a typical BBW pattern (Salmon pattern) and a certain darker banding. The other sided tends a bit more into a darker violet color and shows the typical banding / swirling in one of the corners which i also found on the other stones. So it seems depending where the stones were taken out youll get either a more violet stone with a quite different pattern or a typical BBW look a like stone with the typical BBW pattern. All the stones i tested did auto slurry quite fast. It takes about 10-15laps with a medium pressure and a lot of slurry will be created.
My Videos about technical topics:
Pierre Lorraine Rouge / Rouge Du Salm Honing Properties
www.youtube.com/watch?v=0CPxcoza4IU
My Videos about Stones:
Pierre Lorraine Rouge / Rouge Du Salm
www.youtube.com/watch?v=P-wuP2ws8BE
Pierre Du Lorraine Rouge / Rouge Du Salm / Goldfisch Wetzstein Marke F&Co.
www.youtube.com/watch?v=WAF8PuugP4E
Pierre Lorraine Rouge / Rouge Du Salm
www.youtube.com/watch?v=2bpjAJfCkrU
more Information:
Badgerandblade.com (B&B): "Lorraine Rouge / Rouge Du Salm / BBW / Goldfisch Wetzstein "
badgerandblade.com/vb/showthread.php/451050-Lorraine-Roug...
general Information on Water Hones:
Gammas Site Tomonagura.com:
Olivia-Seife.de: “Steinevergleich”
www.olivia-seife.de/steinevergleich.htm
other Literature/Information:
[1] Bos, Henk - "Grinding and Honing Part 4 Belgian Whetstones", Info 20M, ISSN 1872-7824
(Link: www.xs4all.nl/~bosq)
[2] Boulvain, F. Prof. & Pingot, J. L. Dr. - Excursions: "Une introduction à la GEOLOGIE de la WALLONIE", Université de Liège, Faculté des Sciences, Département de Géologie, 2014
(Link: www2.ulg.ac.be/geolsed/geolwal/geolwal.htm)
[3] Boulvain, F. Prof. - Excursions "Excursions des cours de Processus Sedimentaires et Geologie de la Wallonie", Université de Liège, Faculté des Sciences, Département de Géologie, 2013
[4] Caubergs Michel - "Inventaire de quelques anciennes mines et carrieres souterraines de Wallonie", Essai D'archeologie miniere, 1991
[5] Devleeschouwer, Xavier / Mullard, Cyril / Goemaere, Eric - "Underground Workings of Slate Vein and Coticule in the commune of Vielsam (Belgium): The Geological Risk Management through Database and GIS", Post-Mining 2005, November 16-17, Nancy, France
(Link: gisos.ensg.inpl-nancy.fr/fileadmin/File/PM_2005/PM05_pdf/...)
[6] Gaspard, Charles - "L'industrie de la Pierre a rasoir dans le region de Sart-Lierneux", Extraites des Enquêtes du Museé de la Vie Wallonie, TOME XIV (No. 5 157-160)
[7] Goemaere, Eric - "Ardoise et coticule en Terre de Salm, Des pierres et des Hommes", Collection Geosciences du Service Géologique de Belgique, Institut Royal des Sciences Naturelles de Belgique, ISBN : 978-2-9600676-1-3
(Link: www.sciencesnaturelles.be/institute/stru cture/geology/gsb...)
(Extrait "L'atelier Burton: www.sciencesnaturelles.be/institute/stru cture/geology/gsb...)
[8] Goemaere, E. & Declercq, P-Y. , 2012. "Le "coticule" de Vielsalm et Lierneux (Belgique)" une pierrre à aiguiser au passé mondial. Ann. Soc. géologique du Nord, 19 (2e série), 117-131
[9] Lessuise, A., "Le coticule. Situation géographique et géologique des gisements. Exploitation et préparation des pierres abrasives. Valorisation des déchets d’exploitation" Annales des Mines de Belgique, 1: 101-125, 1981
[10] Remacle, A. - "Les ardoisières de l’Ardenne belge" Intérêt biologique et état des lieux des sites en surface. Région wallonne, Direction Générale des Ressources Naturelles et de l’Environnement, Division de la Nature et des Forêts, Travaux n° 30, 189 p., 2007
[11] Renard, A. & S.J. - "Sur la structure et La Composition Minéralogique Du Coticule et sur ses Rapports avec Le Phyllade Oligistifère, 21.10.1876
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Java’s population density of 2,070 people per square mile is more than five times New York State’s population density of 382.4 people per square mile. New Jersey, the state with the highest population density in the U.S., has 886 people per square mile, less than half that of Java.
Submitted caption:
These high-density cylindrical structures were obtained by the BOSCH process in an Oxford Reactive Ion etching tool. These are 1.1 µm diameter sized pillars with a gap of 800 nm and a height of 5 µm, fabricated from a 30 nm chrome mask. This image is a part of integration of semiconductor-based components and functionality into soft microfluidics for cell lysis and other biological applications Single-cell genomics project.
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This image was submitted to the University of Chicago's 2022 Science as Art competition. From neurons to nanoparticles, the entries display the gorgeous landscape of scientific research going on every day at the University of Chicago. More than 100 images were submitted to the contest, from undergraduates, graduate students, staff, postdoctoral researchers, and faculty members. Read more.
Image may only be reprinted with credit to the authors and the University of Chicago.
Technical Details
8 Seconds, Aperture: f/5.0, Focal Length: 130 mm, ISO Speed: 200
Nikon D90, Sigma 70-200mm f/2.8 DG Macro HSM II with B+W ND 3.0 and Tiffen Digital HT color graduated ND 0.6 filters.
© Camilo Bonilla. All Rights Reserved. No usage allowed including copying or sharing without written permission.
Dedicated in July 2004 the Garden of Peace is a memorial commemorating victims of homicide including those murdered by terrorists on September 11, 2001. It is a living reminder of the impact of violence and a visual testament to the need for eliminating terror and violence. The Garden is a symbol of hope for peace and renewal in our lives, our community, and the world.
The central feature of the memorial is a dry streambed containing smooth river stones engraved with the names of victims of homicide. The streambed begins with a circular black granite stone called "Tragic Density" that symbolizes the enormous weight of sadness and grief. The streambed moves through the Garden and culminates with a trickle of water into a pool out of which rises "Ibis Ascending", a skyward sculpture representing hope.
Sadly the Garden of Peace appears to be Boston's least known memorial. It took us a really long time to find it - none of the people that we asked had heard of it. The Boston police officer we asked directed us instead to the 9/11 Peace Garden in the Boston Public Gardens. Despite being in downtown Boston the Garden of Peace is off the beaten tourist trails. It is lost within a narrow maze of twisting streets hidden between government office buildings. A few of the streets were sealed off because of construction. Unlike other Boston tourist attractions there are no signs pointing the way, no cops and no tourists. On the weekday evening that we visited the area was poorly lit and the Garden of Peace was home to homeless people. I imagine the area is fairly safe on a weekday with people working in the adjacent buildings, but I wouldn't loitter here in the evening or during the weekend.
If you do decide to visit look for a courtyard adjacent to the plaza of the 100 Cambridge Street Building (formerly the Saltonstall State Office Building) and bring friends.
Boston Garden of Peace - 100 Cambridge Street in Boston, Massachusetts - Google Map