منابع مشابه
How do changes in speed affect the perception of duration?
Six experiments investigated how changes in stimulus speed influence subjective duration. Participants saw rotating or translating shapes in three conditions: constant speed, accelerating motion, and decelerating motion. The distance moved and average speed were the same in all three conditions. In temporal judgment tasks, the constant-speed objects seemed to last longer than the decelerating o...
متن کاملThe hydrodynamics of eel swimming II. Effect of swimming speed.
Simultaneous swimming kinematics and hydrodynamics are presented for American eels, Anguilla rostrata, swimming at speeds from 0.5 to 2 L s(-1). Body outlines and particle image velocimetry (PIV) data were collected using two synchronized high-speed cameras, and an empirical relationship between swimming motions and fluid flow is described. Lateral impulse in the wake is estimated assuming that...
متن کاملWater-Induced Finger Wrinkles Do Not Affect Touch Acuity or Dexterity in Handling Wet Objects
Human non-hairy (glabrous) skin of the fingers, palms and soles wrinkles after prolonged exposure to water. Wrinkling is a sympathetic nervous system-dependent process but little is known about the physiology and potential functions of water-induced skin wrinkling. Here we investigated the idea that wrinkling might improve handling of wet objects by measuring the performance of a large cohort o...
متن کاملSwimming C. elegans in a wet granular medium.
C. elegans is a round worm that lives in wet soil and moves by undulating its body in a sinusoidal wave. We perform experiments on wild-type C. elegans swimming in a granular medium composed of 98 m glass particles and aqueous fluid. Figure 1 shows that a worm swims faster in a granular medium V 0.46 mm /s than in a fluid without particles V 0.37 mm /s . C. elegans in a granular medium undulate...
متن کاملSwimming Speed of The Breaststroke Kick
The breaststroke kick is responsible for a considerable portion of the forward propulsion in breaststroke swimming. The aim of this study was to measure selected anthropometric variables and functional properties of a swimmer's body: length of body parts; functional range of motion in the leg joints and anaerobic power of the lower limbs. Chosen kinematic variables useful in the evaluation of s...
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ژورنال
عنوان ژورنال: British Journal of Sports Medicine
سال: 1986
ISSN: 0306-3674
DOI: 10.1136/bjsm.20.3.129