Results 211 to 220 of about 345,568 (255)
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Seasonally Changing Speed Limits: Effects on Speeds and Accidents
Transportation Research Record: Journal of the Transportation Research Board, 2000Summarized are the results of studies that examined the effects of speed limits that were changed on a seasonal basis on Finnish main roads. The first of these studies was an experimental study (1987–1989) in which speed limits were changed according to time of year.
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Physics World, 1991
Superfluids are extraordinary liquids whose viscosity is zero. This enables them to flow without friction and to pass effortlessly through fine pores or tiny openings (in earthenware pottery for example) that are quite impervious to ordinary fluids such as water. Similarly, an object moving in a superfluid experiences no drag and behaves dynamically as
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Superfluids are extraordinary liquids whose viscosity is zero. This enables them to flow without friction and to pass effortlessly through fine pores or tiny openings (in earthenware pottery for example) that are quite impervious to ordinary fluids such as water. Similarly, an object moving in a superfluid experiences no drag and behaves dynamically as
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Nature, 1975
OBSERVATION and analysis of the swimming of marine fish in laboratory aquaria and in the vicinity of fishing gear (C.S.W., unpublished) have indicated that small fish (0.1 m) can reach speeds up to 25 body lengths s−1 whereas larger fish (1 m) seem unable to exceed 4 body lengths s−1.
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OBSERVATION and analysis of the swimming of marine fish in laboratory aquaria and in the vicinity of fishing gear (C.S.W., unpublished) have indicated that small fish (0.1 m) can reach speeds up to 25 body lengths s−1 whereas larger fish (1 m) seem unable to exceed 4 body lengths s−1.
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Journal of Theoretical Biology, 1995
An upper bound on the speed of evolution is derived. The bound concerns the amount of genetic information which is expressed in observable ways in various aspects of the phenotype. The genetic information expressed in some part of the phenotype of a species cannot increase faster than a given rate, determined by the selection pressure on that part ...
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An upper bound on the speed of evolution is derived. The bound concerns the amount of genetic information which is expressed in observable ways in various aspects of the phenotype. The genetic information expressed in some part of the phenotype of a species cannot increase faster than a given rate, determined by the selection pressure on that part ...
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