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Drew Weissman (born September 7, 1959) is an American physician and immunologist known for his contributions to RNA biology. Weissman is the inaugural Roberts Family Professor in Vaccine Research, director of the Penn Institute for RNA Innovation, and professor of medicine at the Perelman School of Medicine at the University of Pennsylvania ...
Persistence of vision is the optical illusion that occurs when the visual perception of an object does not cease for some time after the rays of light proceeding from it have ceased to enter the eye. [1] The illusion has also been described as "retinal persistence", [2] "persistence of impressions", [3] simply "persistence" and other variations.
The Strehl ratio is a measure of the quality of optical image formation, originally proposed by Karl Strehl, after whom the term is named. [1] [2] Used variously in situations where optical resolution is compromised due to lens aberrations or due to imaging through the turbulent atmosphere, the Strehl ratio has a value between 0 and 1, with a hypothetical, perfectly unaberrated optical system ...
Optical coherence tomography. A high-resolution spectral-domain OCT scan (3×3 mm) of a dry age-related macular degeneration eye showing geographic atrophy and drusen in macula on both cross-sectional and en face fly-through. Optical coherence tomography ( OCT) is an imaging technique that uses interferometry with short- coherence-length light ...
Jennifer J. Wiseman is Senior Project Scientist on the Hubble Space Telescope, and an American astronomer, born in Mountain Home, Arkansas. [1] She earned a bachelor's degree in physics from MIT and a Ph.D. in Astronomy from Harvard University in 1995. Wiseman discovered periodic comet 114P/Wiseman-Skiff while working as an undergraduate search ...
wam.umn.edu. Weisman Art Museum is an art museum at the University of Minnesota in Minneapolis, Minnesota. Founded in 1934 as University Gallery, the museum was originally housed in an upper floor of the university's Northrop Auditorium. In 1993, the museum moved to its current building, designed by the Canadian-born American architect Frank ...
Stabilized images. In vision science, stabilized Images are images that remain immobile on the retina. Under natural viewing conditions, the eyes are always in motion. Small eye movements continually occur even when attempting fixation (the maintenance of steady gaze on a single point). Experiments in the early 1950s established that stabilized ...
A real image is the collection of focus points made by converging rays, while a virtual image is the collection of focus points made by extensions of diverging rays. In other words, a virtual image is found by tracing real rays that emerge from an optical device ( lens , mirror , or some combination) backward to perceived or apparent origins of ...
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