The Effect Of Stimulus Duration On The Optical Threshold Of Flicker Fusion Under Several Conditions PDF Download
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Author | : Milton John Marcus |
Publisher | : |
Total Pages | : 120 |
Release | : 1956 |
Genre | : American mink |
ISBN | : |
Download The Effect of Stimulus Duration on the Optical Threshold of Flicker-fusion Under Several Conditions Book in PDF, ePub and Kindle
Author | : Carney Landis |
Publisher | : |
Total Pages | : 144 |
Release | : 1953 |
Genre | : Flicker fusion |
ISBN | : |
Download An Annotated Bibliography of Flicker Fusion Phenomena Covering the Period 1740-1952 Book in PDF, ePub and Kindle
Author | : Nicholas Byron Louis |
Publisher | : |
Total Pages | : 56 |
Release | : 1952 |
Genre | : |
ISBN | : |
Download The Effect of Light-dark Ratio in Critical Flicker Fusion Threshold Determinations Book in PDF, ePub and Kindle
Author | : Carney Landis |
Publisher | : National Academies |
Total Pages | : 140 |
Release | : 1953 |
Genre | : Flicker fusion |
ISBN | : |
Download An Annotated Bibliography of Flicker Fusion Phenomena Covering the Period 1740-1952 Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 1002 |
Release | : 1979 |
Genre | : Optical instruments |
ISBN | : |
Download Journal of the Optical Society of America Book in PDF, ePub and Kindle
Author | : Carol Jeanette Ladan |
Publisher | : |
Total Pages | : 0 |
Release | : 1971 |
Genre | : Flicker fusion |
ISBN | : |
Download TFF Book in PDF, ePub and Kindle
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.
Author | : |
Publisher | : |
Total Pages | : 998 |
Release | : 1982 |
Genre | : Medicine |
ISBN | : |
Download Cumulated Index Medicus Book in PDF, ePub and Kindle
Author | : Michael Wall |
Publisher | : Kugler Publications |
Total Pages | : 502 |
Release | : 1997 |
Genre | : Gardening |
ISBN | : 9789062991396 |
Download Perimetry Update 1996/1997 Book in PDF, ePub and Kindle
Author | : Helga Kolb |
Publisher | : |
Total Pages | : |
Release | : 2007 |
Genre | : |
ISBN | : |
Download Webvision Book in PDF, ePub and Kindle
Author | : Jeffrey Davis |
Publisher | : Lippincott Williams & Wilkins |
Total Pages | : 1262 |
Release | : 2021-04-14 |
Genre | : Medical |
ISBN | : 1975143876 |
Download Fundamentals of Aerospace Medicine Book in PDF, ePub and Kindle
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.