C R EVANS
Biographic Data
| ID | 5709795 |
|---|---|
| NAME | C R EVANS |
| GIVEN NAMES | C R |
| FAMILY NAME | EVANS |
| SIGNATURE | EVANS C R |
| AFFILIATIONS | National Physical Laboratory |
| VERIFIED | No |
| TOTAL WORKS | 3 |
| TOTAL CITATIONS | 0 |
| WORKS AS AUTHOR | 3 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 1965 |
| LATEST PUBLICATION YEAR | 1983 |
| H-INDEX | 0 |
Summer Diet of the Bearded Seal ( Erignathus barbatus ) in the Canadian High Arctic
Stomach contents of 34 bearded seals taken in three High Arctic localities (Grise Fiord, Pond Inlet and Clyde) during the summers from 1978-1980 were examined. At least 12 species of fish were present but sculpins (Cottidae) and arctic cod (Boreogadus saida) comprised the bulk of the diet. Eelpouts (Lycodes spp.) and polar cod (Arctogadus glacialis) were also ingested in considerable amounts. In 15 of 19 stomachs containing > 1 kg food, fish cont…
Further Studies of Pattern Perception and a Stabilized Retinal Image
A technique to allow the study of prolonged after‐images as perfectly stabilized retinal images is described. A simple model to account for the variability of unitary or fragmentary disappearance of stabilized images is proposed and tested. Results suggest the presence of recognition units mediating the perception of straight lines which vary in size from approximately 30 to 90 min arc in the human fovea and perifovea. These units appear to be ar…
Some Studies of Pattern Perception Using a Stabilized Retinal Image
Using a stabilization device capable of covering 30° of the visual field, targets of various shapes were studied extensively. Very large and consistent differences were found between the percentage disappearances of most targets and this was found not to be a function of length of line or boundary. The presence of corners and intersections in a target increased percentage disappearance. Jagged, angular figures disappeared more than rounded, topol…
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Some Studies of Pattern Perception Using a Stabilized Retinal Image
Using a stabilization device capable of covering 30° of the visual field, targets of various shapes were studied extensively. Very large and consistent differences were found between the percentage disappearances of most targets and this was found not to be a function of length of line or boundary. The presence of corners and intersections in a target increased percentage disappearance. Jagged, angular figures disappeared more than rounded, topol…
Further Studies of Pattern Perception and a Stabilized Retinal Image
A technique to allow the study of prolonged after‐images as perfectly stabilized retinal images is described. A simple model to account for the variability of unitary or fragmentary disappearance of stabilized images is proposed and tested. Results suggest the presence of recognition units mediating the perception of straight lines which vary in size from approximately 30 to 90 min arc in the human fovea and perifovea. These units appear to be ar…
Summer Diet of the Bearded Seal ( Erignathus barbatus ) in the Canadian High Arctic
Stomach contents of 34 bearded seals taken in three High Arctic localities (Grise Fiord, Pond Inlet and Clyde) during the summers from 1978-1980 were examined. At least 12 species of fish were present but sculpins (Cottidae) and arctic cod (Boreogadus saida) comprised the bulk of the diet. Eelpouts (Lycodes spp.) and polar cod (Arctogadus glacialis) were also ingested in considerable amounts. In 15 of 19 stomachs containing > 1 kg food, fish cont…
Geometry (2 works) · Mathematics (2 works) · Medicine (2 works) · Neuroscience (2 works) · Ophthalmology (2 works) · Ophthalmology (2 works) · Perception (2 works) · Psychology (2 works) · Retinal (2 works) · Advanced Optical Imaging Technologies (1 work)