نتایج جستجو برای: zenith
تعداد نتایج: 2358 فیلتر نتایج به سال:
Drought stress is one of the major abiotic stresses that limits rice productivity in the world. In this study 83 diverse rice genotypes were evaluated under reproductive-stage drought stress and non-stress conditions in a completely randomized design with three replications. Eleven well known stress tolerance and susceptibility indices were calculated based on the grain yield under stress and n...
We estimate in this paper the errors in the zenith angle distribution for the charged current events of the solar neutrinos caused by the uncertainty of the earth electron density. In the model of PREM with a 5% uncertainty in the earth electron density we numerically calculate the corrections to the correlation between [N ]5/[N ]2 and [N ]2/[N ]3, and find the errors notable. Forthcoming resul...
The atmospheric neutrino ux ratio = e and its zenith angle dependence have been measured in the multi-GeV energy range using an exposure of 25.5 kiloton-years of the Super-Kamiokande detector. By comparing the data to a detailed Monte Carlo simulation, the ratio =e DATA ==e M C was measured to be 0:660:06stat:0:08sys:. In addition, a strong distortion in the shape of the event zenith angle dist...
We have measured atmospheric neutrinos using data from a 25.5 kton year of the Super{Kamiokande detector. Using detailed ux calculations and detector simulations, we con rm that the avor ratio = e is signi cantly smaller than the expected value. Measured zenith angle distributions indicate that the small avor ratio is due to a de cit of upward going muon neutrinos. The neutrino oscillation hypo...
The atmospheric range error in an electromagnetic signal arriving vertically at the earth is measured by the height integral of the refractivity N through the atmosphere. (N = 10^ (n-1) where n is the index of refraction.) N in the non-ionized atmosphere is the sum of "dry" and "wet" components, which are considered separately. Only the dry part is important at optical wavelengths,and the prese...
Super-Kamiokande uses neutrino-electron elastic scattering to measure the recoil electron spectrum and zenith-angle dependence of solar B neutrinos. SNO has measured the B neutrino–deuteron charged-current reaction rate. The elastic scattering rate, spectrum and zenith-angle dependence in conjunction with the charged-current reaction rate favors active neutrino oscillations at large mixing angl...
Existing methods for constructive induction usually isolate feature generation from problem solving, and do not exploit information about the purpose for which features are created. This paper describes a theory of feature generation that creates features using both a domain theory and feedback from a concept learner. An evaluation function can then be learned using these features that is able ...
Directional surface reflectance is defined as the ratio between the radiance measured in specific observation geometry (zenith and azimuth) and a direct source of illumination (zenith and azimuth) in an infinitely small solid angle. The directional surface reflectance is determined from satellite observations though the atmospheric correction process. When properly retrieved, the directional re...
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