نتایج جستجو برای: accidental falls
تعداد نتایج: 51802 فیلتر نتایج به سال:
We both theoretically and experimentally examine the behavior of the first- and the second-order rainbows produced by a normally illuminated glass rod, which has a nearly elliptical cross section, as it is rotated about its major axis. We decompose the measured rainbow angle, taken as a function of the rod's rotation angle, into a Fourier series and find that the rod's refractive index, average...
Product replacement plays a critical role in many high-tech durable goods markets. Since these markets frequently undergo both rapid improvements in quality and falling prices, the consumer's replacement decision is most often due to product obsolescence, as opposed to wear and tear. Despite its importance, this issue has received insufficient attention in the literature, especially from an emp...
Correspondence to: Dr K J Rothman, Epidemiology, 1 Newton Executive Park, Newton Lower Falls, MA 02161, USA John Graunt, 17th century citizen of London, thought of himself as a haberdasher. History knows him, however, as the first epidemiologist and demographer. He made his mark because he grasped the potential in an overlooked data source of his day-the weekly Bills of Mortality-and he mined t...
What infants decide to do does not necessarily reflect the extent of what they know. In the current study, 17-month-olds were encouraged to walk through openings of varying width under risk of entrapment. Infants erred by squeezing into openings that were too small and became stuck, suggesting that they did not accurately perceive whether they could fit. However, a second penalty condition reve...
Expressives like damn and bastard have, when uttered, an immediate and powerful impact on the context. They are performative, often destructively so. They are revealing of the perspective from which the utterance is made, and they can have a dramatic impact on how current and future utterances are perceived. This, despite the fact that speakers are invariably hard-pressed to articulate what the...
BACKGROUND This study used a dual task design to examine the effect of sensory context on postural stability during the concurrent performance of an attentionally demanding cognitive task in young and older adults with and without a history of imbalance and falls. METHODS A choice reaction time auditory task was used to produce changes in attention during quiet stance in six different sensory...
Scholars who study the medium assume a clear and natural distinction between fictional and non-fictional television. Falling into the former category are most prime-time shows, specials, movies, and other broadcasts serving, it is assumed, primarily as entertainment. Further, many scholars assume that such shows have little impact on the way people think about the "real world,' in general, and ...
Chinese is a tone language. As a tone language, each lexical item has an inherent tone pattern. In Chinese there are four tones : high, rising, low and falling. Our experiment investigates first the pattern of declination in Standard Chinese broadcasts and TV news speech, secondly the interaction of this effect with the sentence lenght and finally the evolution of the tones F0 values all throug...
Albert Einstein's insight that it is impossible to distinguish a local experiment in a "freely falling elevator" from one in free space led to the development of the theory of general relativity. The wave nature of matter manifests itself in a striking way in Bose-Einstein condensates, where millions of atoms lose their identity and can be described by a single macroscopic wave function. We com...
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