نتایج جستجو برای: which have lower altitudes
تعداد نتایج: 5424114 فیلتر نتایج به سال:
We present a ray-tracing study of the propagation of PC 3 Alfven mode waves originating at the dayside magnetopause. This study reveals interesting features of a magnetospheric filter effect for these waves. PC 3 Alfven mode waves cannot penetrate to low Earth altitudes unless the wave frequency is below approximately 30 mHz. Configurations of the dispersion curves and the refractive index show...
Because of the broad range of altitudes spanned by its catchment, the American River is notable for its occasional, very large winter floods. These floods typically are spawned by warm and exceptionally wet storms that deposit heavy rain or wet snows on broad expanses of the river’s watershed, generating rapid runoff and high streamflows. On flood and longer time scales, the American River is n...
If a linear block code C of length n has a Tanner graph without cycles, then maximum-likelihood soft-decision decoding of C can be achieved in time O(n). However, we show that cycle-free Tanner graphs cannot support good codes. Specifically, let C be an (n, k, d) linear code of rate R = k/n that can be represented by a Tanner graph without cycles. We prove that if R ≥ 0.5 then d ≤ 2, while if R...
We present a climatology of monthly and 10 zonal mean profiles of sulfur dioxide (SO2) volume mixing ratios (vmr) derived from MIPAS/Envisat measurements in the altitude range 15–45 km from July 2002 until April 2012. The vertical resolution varies from 3.5–4 km in the lower stratosphere up to 6–10 km at the upper end of the profiles, with estimated total errors of 5–20 pptv for single profiles...
A review of published evidence of superior efficacy of a particular antidepressant in major depressive disorder may assist clinicians in making considered treatment choices. To identify such candidates, an international group of experts met to assess published evidence (identified through searches in Medline and Embase databases and discussions with experts in the field) from randomized, contro...
The viable micropopulation at three altitudes (152, 1,066, and 1,981 meters) of a land air mass as it traversed an ocean was determined. At the low altitude, a consistent pattern of decrease in numbers of land-originating microorganisms with increasing distance from shore was observed. At the higher altitudes, the observed pattern was one of irregularity. At the lower altitude the percentages o...
Abstract Background: Taking into account the resistance of cancer cells to chemical drugs and considering the various reports on the effects of plants from the genus Artemisia for the cure of various ailments and diseases, this investigation was undertaken to compare the cytotoxic effects of different plant organs collected from low and high altitudes. In this study the cytotoxicity of metha...
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