Keeping PERfect time
نویسندگان
چکیده
منابع مشابه
Perfect time or perfect crime?
Imagine the situation: “One day, you notice an old country woman crossing a downtown street, just about to put one foot down on the rails of the streetcar line. [...] Suppose, now, that at the very moment she puts her foot on the rail a streetcar comes rushing down the tracks toward her. If the old woman does not notice the car and continues across the tracks nothing will happen. But if someone...
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This work describes and evaluates three algorithms for end-to-end time synchronization between a client computer and a server of “true” time (e.g. a GPS source) using messages transmitted over packet switched networks, such as the Internet. The messages exchanged have the NTP format and the algorithms compared, are performed only at the client side. They are based on adaptive (Kalman) filtering...
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The accepted dogma in circadian biology is that the transcription factor CLOCK lies at the heart of the molecular clock that drives behavioral and molecular rhythms. In this issue of Neuron, the generation of CLOCK-deficient mice with only subtle clock defects by DeBruyne et al. shakes up this view of the mammalian clock.
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Traditionally, Col2:16 and Gal 4: 10 are understood as the negation of Christian observance of Jewish time-keeping schemes, including Sabbath observance. However, Troy Martin has recently proposed radical reinterpretations of these two verses, which are consistent with the continued Christian observance of the Jewish religious calendar.' For Martin, the major problem with the traditional interp...
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Several topics connecting basic vision research to image compression and image quality are discussed: 1) A battery of about 7 specially chosen simple stimuli should be used to tease apart the multiplicity of factors affecting image quality. 2) A "perfect" static display must be capable of presenting about 135 bits/mm2. This value is based on the need for 3 pixels/mm and 15 bits/pixel. 3) Image ...
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ژورنال
عنوان ژورنال: Science
سال: 1995
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.7855589