Results 211 to 220 of about 17,166 (262)
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Acta Ophthalmologica, 1972
Flicker ERGs from normal human eyes are recorded using an averaging technique. After 300 msec the curve is in a stationary phase with strict periodicity. It is constructed by algebraic summation of individual flash responses with “head‐to‐tail” overlapping in higher frequencies. At a flash frequency of 25 cps.
N I, Bachen, M, Davanger
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Flicker ERGs from normal human eyes are recorded using an averaging technique. After 300 msec the curve is in a stationary phase with strict periodicity. It is constructed by algebraic summation of individual flash responses with “head‐to‐tail” overlapping in higher frequencies. At a flash frequency of 25 cps.
N I, Bachen, M, Davanger
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Flicker photometry: residual minimum flicker
Journal of the Optical Society of America A, 1986We show that when all possible optical artifacts are eliminated in a flicker photometric procedure, there is still a residual minimum flicker after color fusion occurs. The stimuli were alternated with approximately rectangular counterphase pulses and we obtained results contrary to those of a previous report where the stimuli were alternated ...
P K, Kaiser, M, Ayama, R L, Pandey Vimal
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Critical Flicker Frequencies in Flicker Perimetry
Archives of Ophthalmology, 1968Flicker fields from 270 individuals between 6 and 95 years of age were grouped into nine age ranges, each covering a decade and containing 30 individuals. For each decade, mean critical flicker frequencies were computed for 49 points of the visual field situated on the horizontal, vertical, and oblique meridians from 0° to 60°.
E, Wolf, A M, Gaeta, S E, Geer
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Binocular flicker appears faster than monocular flicker
Journal of the Optical Society of America, 1981Observers adjusted the frequency of an auditory click to match the apparent flicker rate of a sinusoidally modulated visual display. Matches made for binocularly viewed flicker were nearly twice those for monocularly viewed flicker but only at high rates of temporal modulation.
D O, Bowker, M B, Mandler
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Red–green flicker photometry and nonlinearities in the flicker electroretinogram
Journal of the Optical Society of America A, 1993We investigated whether responses from different cone classes are combined before or after the nonlinearity that is responsible for generating nonlinear response components of the flicker electroretinogram (ERG). We measured the nonlinear response of the retina while systematically varying the modulation in the long-wavelength-sensitive and middle ...
Y, Chang, S A, Burns, M R, Kreitz
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Flicker noise in pentodes flicker partition noise
Physica, 1960Abstract The method of approach used in the study of flicker noise in positive grid triodes is applied to pentodes with some modifications. It is demonstrated experimentally that the flicker noise current generated at the cathode of a pentode distributes over the positive electrodes in the ratio of the ac currents.
R.C. Schwantes, A. van der ziel
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Flicker stimulation with chimpanzees
Life Sciences, 1967Abstract Although extensive work has been carried out in experimentally induced epileptiform states (alumina cream, metrazol, etc.) in animals, only man has been known to have idiopathic photosensitive epilepsy. Recent work by Killam et al . (2, 3, 4 and 5) has demonstrated a photo-sensitive response in old world monkeys that may well represent ...
R, Naquet, K F, Killam, J M, Rhodes
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2022
This chapter analyzes and compares the diegetic and symbolic roles of cinema as a motif across both HBO’s Watchmen and DC’s Doomsday Clock. HBO’s Watchmen inserts cinema into the origins of the superhero genre; instead of dating the emergence of the American superhero to Superman’s first appearance in Action Comics #1 (1938), it stretches further back ...
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This chapter analyzes and compares the diegetic and symbolic roles of cinema as a motif across both HBO’s Watchmen and DC’s Doomsday Clock. HBO’s Watchmen inserts cinema into the origins of the superhero genre; instead of dating the emergence of the American superhero to Superman’s first appearance in Action Comics #1 (1938), it stretches further back ...
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ACCOMMODATION FOR FLICKERING STIMULI
Ophthalmic and Physiological Optics, 1985Abstract— A laser optometer was used to measure accommodative responses of three observers for sinusoidal gratings presented in Maxwellian view at optical distances ranging from 0 to 4 dioptres. Contrast of the stimuli was modulated spatially at 1.0, 4.2 and 6.5 cycles deg. ‐1
D A, Owens, J M, Wolfe
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