نتایج جستجو برای: heading confinement pressure
تعداد نتایج: 434233 فیلتر نتایج به سال:
BACKGROUND Soccer is among the most popular youth sports with over 3 million youth players registered in the U.S. Soccer is unique in that players intentionally use their head to strike the ball, leading to concerns that heading could cause acute or chronic brain injury, especially in the immature brains of children. METHODS Pub Med search without date restriction was conducted in November 20...
Heading date is a critical trait for adaptation of rice to different cultivation areas and cropping seasons. We evaluated the heading dates of 1,123 chromosome segments substitution lines (CSSLs) in the genetic background of an elite rice variety Huajingxian74 (HJX74). A CSSL with the substituted segments from Zihui100 exhibited late heading under both natural long-day (NLD) and natural short-d...
This study compared changes in neurocognitive performance and symptom reports following an acute bout of soccer heading among athletes with and without protective soccer headgear. A total of 25 participants headed a soccer ball 15 times over a 15-minute period, using a proper linear heading technique. Participants in the experimental group completed the heading exercise while wearing a protecti...
Cancer can be a devastating illness causing severe debilitation and prolonged confinement to bed. It is, therefore, not unexpected that oncologists would be required to manage pressure ulcers as part of the comprehensive care of their cancer patients. The consequences of these lesions can be devastating, even fatal. Thus, the common bedsore should not be overlooked as an important clinical prob...
Many forms of locomotion rely on the ability to accurately perceive one's direction of locomotion (i.e., heading) based on optic flow. Although accurate in rigid environments, heading judgments may be biased when independently moving objects are present. The aim of this study was to systematically investigate the conditions in which moving objects influence heading perception, with a focus on t...
INTRODUCTION There is growing concern around the effects of concussion and sub-concussive impacts in sport. Routine game-play in soccer involves intentional and repeated head impacts through ball heading. Although heading is frequently cited as a risk to brain health, little data exist regarding the consequences of this activity. This study aims to assess the immediate outcomes of routine footb...
The advantages of EDA H-modes include good energy confinement and no impurity accumulation or large ELMs. In EDA, the edge pressure gradients are at or above the ideal ballooning limit but are not relaxed by type I ELMs; instead a continuous process would seem to be at work. This process is probably related to broadband and quasi-coherent fluctuations which are seen with reflectometry, probes, ...
Concussions in soccer are often coincident with the act of heading the ball, and some researchers have reported that soccer heading is associated with neurocognitive decrements. This study aimed to understand (a) the personality factors that may predict frequent soccer heading, and (b) how knowledge of players’ personality traits might help sport counselors persuade neurologically at-risk playe...
Observer translation relative to the world creates image flow that expands from the observer's direction of translation (heading) from which the observer can recover heading direction. Yet, the image flow is often more complex, depending on rotation of the eye, scene layout and translation velocity. A number of models [1-4] have been proposed on how the human visual system extracts heading from...
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