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This is an infographic of the population density of the United States for 2010. It includes a population density map of states.
Technical Details
8 Seconds, Aperture: f/2.8, Focal Length: 170 mm, ISO Speed: 200
Nikon D90, Sigma 70-200mm f/2.8 DG Macro HSM II with Tiffen Digital HT color graduated ND .6 filter.
© Camilo Bonilla. All Rights Reserved. No usage allowed including copying or sharing without written permission.
Part of a sea of tiny sculptures at the entrance to San Jose's Happy Hollow Park & Zoo, which has reopened--expanded & refurbished-- after being closed to visitors for nearly two years.
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medcrossimagingllc.com/what-is-bone-density-testing/
Bone Density Testing, or DEXA
Bone densitometry, using an advanced technology called DEXA (short for dual-energy x-ray absorptiometry), safely, accurately and painlessly measures bone mineral density. Bone densitometers with an additional capability called Instant Vertebral Assessment TM or IVA, may also produce an x-ray of the entire spine for the assessment of vertebral (spine) fractures.
During a comprehensive examination with DEXA, you lay comfortably still on a padded table while the DEXA unit scans two or more areas, usually the fracture-prone hip and spine. Unlike typical x-ray machines, radiation exposure during bone densitometry is extremely low-less than the radiation exposure during a coast-to-coast airline flight. The entire process takes only minutes to complete, depending on the number of sites scanned. It involves no injections or invasive procedures, and you remain fully clothed. DEXA is a fast, convenient and precise way to measure bone density and to help determine your risk of developing osteoporosis and future fractures.
Preparing for a bone density exam
Wear comfortable clothing without zippers or metal if possible (the metal creates a false reading). Patient gowns are also available. No special prep is necessary.
Do not schedule nuclear medicine or studies with Barium prep (like a fluoroscopy study or certain CT exams) within two days before your bone density exam as the contrast used in these tests will also cause a false reading.
Please refrain from taking any calcium supplements 24 hours before a bone density exam as this may also cause a false reading.
Results:
T score – This number shows the amount of bone you have compared with a young adult of the same gender with peak bone mass. A score above -1 is considered normal. A score between -1 and -2.5 is classified as osteopenia, the first stage of bone loss. A score below -2.5 is defined as osteoporosis. The T score is used to estimate your risk of developing a fracture.
Edited ESA stellar density map showing, mainly, the Milky Way Galaxy.
Original caption: Stellar density map
The outline of our Galaxy, the Milky Way, and of its neighbouring Magellanic Clouds, in an image based on housekeeping data from ESA’s Gaia satellite, indicating the total number of stars detected every second in each of the satellite's fields of view.
Brighter regions indicate higher concentrations of stars, while darker regions correspond to patches of the sky where fewer stars are observed.
The plane of the Milky Way, where most of the Galaxy’s stars reside, is evidently the brightest portion of this image, running horizontally and especially bright at the centre. Darker regions across this broad strip of stars, known as the Galactic Plane, correspond to dense, interstellar clouds of gas and dust that absorb starlight along the line of sight.
The Galactic Plane is the projection on the sky of the Galactic disc, a flattened structure with a diameter of about 100 000 light-years and a vertical height of only 1000 light-years.
Beyond the plane, only a few objects are visible, most notably the Large and Small Magellanic Clouds, two dwarf galaxies orbiting the Milky Way, which stand out in the lower right part of the image. A few globular clusters – large assemblies up to millions of stars held together by their mutual gravity – are also sprinkled around the Galactic Plane.
Acknowledgement: this image was prepared by Edmund Serpell, a Gaia Operations Engineer working in the Mission Operations Centre at ESA’s European Space Operations Centre in Darmstadt, Germany.
This work is licenced under the Creative Commons Attribution-ShareAlike 3.0 IGO (CC BY-SA 3.0 IGO) licence.
Credit: ESA/Gaia – CC BY-SA 3.0 IGO
First thing we did upon our return to Canada.
Paddling Lake St. Lawrence, two persons per square kilometer (just us)!
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Our Old English Sheepdog posed just for one shot. My first attempt at HDR and she moved for shots 2 & 3 even though my camera was on a tripod. Using PhotoMatrix demo, it left a logo which is difficult to remove in HDR. Poor image but a good test.
This visualization has been developed during the course held by the Density Design collective, during the analysis by digital methods of the online community speaking around dams.
The upper part of the graph represents the entities involved in the discussion of more than a single dam, divided by provenance.
The lower part of the graph represents the entities involved only in the discussion of ester dams compared to the state of the entity, divided by provenance.
that density at the end of this street. I have several images of it, if I only knew what to call them so I could make a set. But I will never find the other ones.
Now I tried the aperture made of neutral density foil, that proved itself in my soft lenses, in a normal 50mm lens. I hoped this would soften the bokeh - and it seems to do so.
Pentax *ist DL, Pentacon 1.8/50, -2 neutral densitity foil aperture ring (~f3.5)