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This profile was last updated on 8/20/14  and contains information from public web pages and contributions from the ZoomInfo community.

Dr. David W. Russell

Wrong Dr. David W. Russell?

Application Scientist

Local Address: Sacramento, California, United States
Agilent Technologies Inc.
5301 Stevens Creek Blvd Lc P.O. Box 58059
Santa Clara , California 95052
United States

Company Description: Agilent Technologies, Inc. is a measurement company providing bio-analytical and electronic measurement solutions to the communications, electronics, life sciences...   more
Background

Employment History

Board Memberships and Affiliations

Education

  • doctorate , psychology
    University of California at San Diego
  • Ph.D. , Department of Brain and Cognitive Sciences
    University of Rochester
156 Total References
Web References
Agilent | Healthcare - Press Releases
www.healthcare.agilent.com, 1 Dec 2000 [cached]
It eliminates the need for excessive pieces of equipment while allowing immediate access to vital patient information, saving time and money," said David Russell, world-wide marketing manager of Agilent's Patient Monitoring Division."The Agilent Telemetry System with optional EASI 12-lead ECG and the new TeleMon are ideal for ambulatory patients, who are best cared for in a flexible monitoring environment.This is yet one more way Agilent continues to help provide a seamless cycle of care for medical staff and patients alike."
About Agilent's Healthcare Solutions Group
Agilent's Healthcare Solutions Group is the worldwide leader in clinical measurement and diagnostic solutions for the healthcare industry.
SPIE Photonics West 2014 Event News and Photos
spie.org [cached]
Featured speaker David Williams, Director of the Center for Visual Science, William G. Allyn Professor of Medical Optics, and professor of Optics, Brain and Cognitive Sciences, Ophthalmology, and Biomedical Engineering, described some recent work.
Color Perception Is Not in the Eye of the Beholder: It's in the Brain
www.adaptiveoptics.org, 25 Oct 2005 [cached]
"We were able to precisely image and count the color-receptive cones in a living human eye for the first time, and we were astonished at the results," says David Williams, Allyn Professor of Medical Optics and director of the Center for Visual Science . "We've shown that color perception goes far beyond the hardware of the eye, and that leads to a lot of interesting questions about how and why we perceive color."
...
now an assistant professor at the University of Houston , used a laser-based system developed by Williams that maps out the topography of the inner eye in exquisite detail. The technology, known as adaptive optics, was originally used by astronomers in telescopes to compensate for the blurring of starlight caused by the atmosphere.
Williams turned the technique from the heavens back toward the eye to compensate for common aberrations. The technique allows researchers to study the living retina in ways that were never before possible. The pigment that allows each cone in the human eye to react to different colors is very fragile and normal microscope light bleaches it away. This means that looking at the retina from a cadaver yields almost no information on the arrangement of their cones, and there is certainly no ability to test for color perception. Likewise, the amino acids that make up two of the three different-colored cones are so similar that there are no stains that can bind to some and not others, a process often used by researchers to differentiate cell types under a microscope.
Imaging the living retina allowed Williams to shine light directly into the eye to see what wavelengths each cone reflects and absorbs, and thus to which color each is responsive. In addition, the technique allows scientists to image more than a thousand cones at once, giving an unprecedented look at the composition and distribution of color cones in the eyes of living humans with varied retinal structure.
Each subject was asked to tune the color of a disk of light to produce a pure yellow light that was neither reddish yellow nor greenish yellow. Everyone selected nearly the same wavelength of yellow, showing an obvious consensus over what color they perceived yellow to be. Once Williams looked into their eyes, however, he was surprised to see that the number of long- and middle-wavelength cones - the cones that detect red, green, and yellow - were sometimes profusely scattered throughout the retina,
...
In a related experiment, Williams and a postdoctoral fellow Yasuki Yamauchi, working with other collaborators from the Medical College of Wisconsin , gave several people colored contacts to wear for four hours a day. While wearing the contacts, people tended to eventually feel as if they were not wearing the contacts, just as people who wear colored sunglasses tend to see colors "correctly" after a few minutes with the sunglasses. The volunteers' normal color vision, however, began to shift after several weeks of contact use. Even when not wearing the contacts, they all began to select a pure yellow that was a different wavelength than they had before wearing the contacts.
"Over time, we were able to shift their natural perception of yellow in one direction, and then the other," says Williams. "This is direct evidence for an internal, automatic calibrator of color perception. These experiments show that color is defined by our experience in the world, and since we all share the same world, we arrive at the same definition of colors."
Williams' team is now looking to identify the genetic basis for this large variation between retinas. Early tests on the original volunteers showed no simple connection among certain genes and the number and diversity of color cones, but Williams is continuing to search for the responsible combination of genes.
David Williams, PhD, FARVO ...
www.arvo.org, 1 July 2014 [cached]
David Williams, PhD, FARVO (VI) University of Rochester Vice President and VI Section Trustee
...
David Williams Photo(1)
Shiloh Baptist Church of Monroe | Staff - Shiloh Baptist Church of Monroe
shilohbaptistmonroe.com, 28 Sept 2014 [cached]
Minister of Music, Worship and Spiritual Development- David Russell
...
David Russell Minister of Music, Worship and Spiritual Development drussell@shilohbaptistmonroe.com
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