Download or read book The Effect of Stimulus Duration on the Optical Threshold of Flicker fusion Under Several Conditions written by Milton John Marcus and published by . This book was released on 1956 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Annotated Bibliography of Flicker Fusion Phenomena Covering the Period 1740 1952 written by Carney Landis and published by . This book was released on 1953 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Light dark Ratio in Critical Flicker Fusion Threshold Determinations written by Nicholas Byron Louis and published by . This book was released on 1952 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Annotated Bibliography of Flicker Fusion Phenomena Covering the Period 1740 1952 written by Carney Landis and published by National Academies. This book was released on 1953 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book TFF written by Carol Jeanette Ladan and published by . This book was released on 1971 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results from a study of Thermal Flicker-Fusion (TFF) are reported. The study tested the effect of input factors similar to those significant in varying CFF (Critical Flicker-Fusion) thresholds for vision. More specifically, amount of area stimulated, intensity level and PCF (Pulse-to-Cycle Fraction) were tested separately, with other factors held constant. Thermal Flicker-Fusion (TFF) thresholds were obtained by means of intermittent radiant energy produced by a modified Hardy- Wolff-GoodeH do!orimeter. Four trained observers were employed, and were tested under all conditions replicated five times. Stimulation was applied to the two body areas (upper back and volar forearm).In general, the thermal fusion results show close correspondence to the functions produced by varying similar parameters in the visual modality. In both, curves relating sensory fusion thresholds to PCF increase to a maximum and then decline. Significant curvi1inearity is seen. Also, increases in amount of area stimulated produces a corresponding increase in both types of fusion thresholds, i.e., results show a significant linear relation between TFF and the variable of area. One major discrepancy does occur, however. In the visual modality, fusion curves produced by variation of energy level increase to a maximum and then decline. The thermal fusion curves ascend with increases in intensity, as one might expect, but no decline occurs in the range tested. Results indicate a significant linear relation between intensity and TFF. Even though "ascending" judgments were analyzed separately from "descending" judgments (due to the resulting absolute differences in rate between the two types of judgments), the form of the curves remained similar. Moreover, the form of the functions is also similar for the different body areas tested, although differences in absolute rates at fusion are noted. Results are compared to previous fusion studies in the thermal and other modalities. Decreases in inter-0_ variability were seen with increasing practice. Results of the present study were similar to those of Kastorf's investigation, in that the form of the analogous curves tended to correspond. Following this, a theoretical explanation in terms of A1ternation-of-Response theory is suggested. The significance of the thermal experiments to von Bekesy's hypothesis relating thresholds and density of innervation are briefly discussed.
Download or read book Journal of the Optical Society of America written by and published by . This book was released on 1979 with total page 914 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Webvision written by Helga Kolb and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cumulated Index Medicus written by and published by . This book was released on 1982 with total page 998 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamentals of Aerospace Medicine written by Jeffrey Davis and published by Lippincott Williams & Wilkins. This book was released on 2021-04-14 with total page 1262 pages. Available in PDF, EPUB and Kindle. Book excerpt: Encompassing all occupants of aircraft and spacecraft—passengers and crew, military and civilian—Fundamentals of Aerospace Medicine, 5th Edition, addresses all medical and public health issues involved in this unique medical specialty. Comprehensive coverage includes everything from human physiology under flight conditions to the impact of the aviation industry on public health, from an increasingly mobile global populace to numerous clinical specialty considerations, including a variety of common diseases and risks emanating from the aerospace environment. This text is an invaluable reference for all students and practitioners who engage in aeromedical clinical practice, engineering, education, research, mission planning, population health, and operational support.
Download or read book Critical Flicker Fusion Threshold in the Peripheral Vision Field written by Anthony M. Mecum and published by . This book was released on 2010 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Neurological Research Supported by the National Institute of Neurological Diseases and Stroke written by National Institute of Neurological Diseases and Stroke and published by . This book was released on 1969 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Human Factors Engineering Bibliographic Series written by and published by . This book was released on 1965 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Methods of Sensory Visual Testing written by Michael Wall and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurement of visual acuity has been the cornerstone of visual testing since Snellen began quantitating visual acuity using letter optotypes in the 1860s. Bjerrum in the 1880s brought sophistication and quantitation to the assessment of the visual field with tangent screen examination using differently sized and colored targets. Further advances in visual testing did not occur until the Goldmann perimeter and the Farnsworth Munsell 100 Hue test were introduced in the 1940s, permitting further refinement in the detection and quantitation of acquired visual loss. An explosion of interest in sensory visual function testing followed the demonstration by Quigley and his colleagues in 1982 that despite the loss of more than 40% of the axons in the optic nerve, Snellen acuity and kinetic perimetry remained normal. Much of this interest has focused on a search for more sensitive and disease-specific sensory visual tests. Previously, novel tests used to probe visual function remained in the province of the visual physiologist and psychophysicist. These tests are now being introduced by the ophthalmologist into clinical practice. Concomitantly, the mass production of microcomputers and other technical advances have made tests such as automated perimetry and visual evoked response testing affordable for most offices. The clinician is presently being inundated with a plethora of visual function tests that may require a knowledge of visual psychophysics and statistics to understand and interpret. The purpose of this book is to acquaint the clinician with these new tests so that they may be used to maximum benefit.
Download or read book Dioptric Review and British Journal of Physiological Optics written by and published by . This book was released on 1967 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Neurological Research Supported by the National Institute of Neurological Diseases and Stroke written by National Institutes of Health (U.S.) and published by . This book was released on 1969 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1978 with total page 1008 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Physiologia Bohemoslovaca written by and published by . This book was released on 1983 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt:
