Visual Perception of LED Flickering Controlled in a Colored Environment

Visual masking by flickering surrounds.

Observers detected drifting sine-wave gratings presented in a circular 3 dia test field which was surrounded by a 3.25 degrees wide annulus. Forced choice contrast thresholds were measured with surrounds consisting of a steady field of light or uniform sinusoidal flicker. The flickering surround raised detection thresholds only for gratings with spatial frequencies below 2-4 c/deg. Variations o...

Student's perception of clinical learning environment

Introduction: Clinical education plays a key role in nursing. Clinical learning environment is one of the most important well-known factors for being successful in nursing educational programs. The aim of this study was to investigate the perception of clinical learning environment among nursing students in Jiroft and Kerman Universities of Medical Sciences. Methods: This descriptive study was...

the role of visual aids and translation in teaching vocabulary in est

the present study investigated the effect of the two vocabulary teaching techniques in est, namely the use of translation and the use of visual aids as two separate vocabulary teaching techniques. to answer the question of the study, a pretest (michigan test) was administered to the 58 randomly selected est students at khajeh nasiredin tusi university, faculty of mechanics. after the homogeneit...

Visual perception in a

An assessment of electrofishing effects on Capoeta capoeta in a controlled environment (salinity and temperature)

The purpose of this study was to investigate the effect of voltage, salinity and temperature on the performance of electrofishing. Number 850 pcs Capoeta capoeta of Chehel Chay river of Golestan province fishing and transported to the laboratory. Distance from the anode, cathode and anode distance during testing, respectively, 10 cm and the 120 cm. Range of length and weight of the fish test sp...