951 resultados para after Coates et al. (1997)
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Mode of access: Internet.
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Tariffs naming what purport to be joint rates between applicants Acme Fast Freight, Incorporated, Atlas Freight, Incorporated, Chaffee-Shippers Service, Incorporated, and Southwestern Carloading Company, and certain motor carriers, found not to be in consonance with section 217(a) of Motor Carrier Act, 1935, and found improperly on file, stricken from the files.
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At head of title: United States Court of Appeals for the Eighth Circuit. No. 17,098. Civil.
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Printed on plate paper.
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Mode of access: Internet.
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German or Italian.
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Mode of access: Internet.
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Mode of access: Internet.
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For the Western-Pacific region spread-F has been found to occur with delays after geomagnetic activity (GA) ranging from 5 to 10 days as station groups are considered from low midlatitudes to equatorial regions. The statistical (superposed-epoch) analyses also indicate that at the equator the spread-F, and therefore associated medium-scale traveling ionospheric disturbances (MS-TIDs) occur with additional delays around 16, 22 and 28 days representing a 6-day modulation of the delay period. These results are compared with similar delays, including the modulation, for D-region enhanced hydroxyl emission (Shefov, 1969). It is proposed that this similarity may be explained by MS-TIDs influencing both the F and D regions as they travel. Long delays of over 20 days are also found near the equator for airglow-measured MS-TIDs (Sobral et al., 1997). These are recorded infrequently and have equatorward motions, while normally eastward motions are measured at the equator. Also in midlatitudes D-region absorption events have been shown (statistically) to have similar long delays after GA. It is suggested that atmospheric gravity waves and associated MS-TIDs may be generated by some of the precipitations responsible for the absorption. The recording of the delayed spread-F events depends on the GA being well below the average levels around sunset on the nights of recording. This implies that lower upper-atmosphere neutral particle densities are necessary.