نتایج جستجو برای: beaming angle
تعداد نتایج: 131315 فیلتر نتایج به سال:
تشخیص لنگش های بند سوم که از مهترین علت های لنگش در اسب می باشد نیاز به فهم یافته های نرمال رادیوگرافی بند سوم دارد. از آنجایی که تاکنون اطلاعات دقیقی در مورد اندازه ها و زوایای بند سوم در اسب عرب خون داخلی به دست نیامده و مقایسه ای با نژادهای دیگر اسب ها صورت نگرفته است. در این تحقیق سعی شده است که خصوصیات بیومتریک بند سوم دست اسب عرب اصیل توسط رادیولوژی مورد بررسی قرار گیرد. در این تحقیق 10 ...
BACKGROUND O(6)-methyl-guanine-methyl-transferase (MGMT) silencing by promoter methylation may identify cancer patients responding to the alkylating agents dacarbazine or temozolomide. PATIENTS AND METHODS We evaluated the prognostic and predictive value of MGMT methylation testing both in tumor and cell-free circulating DNA (cfDNA) from plasma samples using an ultra-sensitive two-step digita...
ABSTRACT Electromagnetic observations of the first binary neutron star (BNS) merger detected in gravitational waves, GW170817, have established that relativistic jets can be successfully launched BNS mergers. Typically, such produce emission two phases: γ-ray prompt and multiwavelength afterglow. Because beaming jet’s angular structure, detectability both these counterparts is dependent on angl...
We present a theoretical foundation for the beaming of light displayed by a single subwavelength aperture in an appropriately corrugated metal film [H. J. Lezec, Science 297, 820 (2002)]]. Good agreement is found between calculations and experimental data. We show that beaming is due to the formation of electromagnetic surface resonances and that the beam direction, width, and wavelength at whi...
In this comment of the article [arXiv:2002.01150] "Locating source field lines Jovian decametric radio emissions" by YuMing Wang et al., 2020, we discuss assumptions used authors to compute beaming angle Jupiter s emissions induced moon Io. Their method, relying on multi-point observations, was applied a single event observed 14th March 2014 Wind and both STEREO A/B spacecraft from 5 16 MHz, er...
The apparent position angle difference ∆PA between parsec and kilo-parsec jets in blazars can be related to the bending properties of the jets. We present correlations between the misalignment ∆PA and the ratio of radio to broad-line emission for a sample of γ-ray blazars. The present study is limited to EGRET sources due to uniform data for the radio and optical properties of these sources bei...
We calculate the prompt x–ray emission as a function of viewing angle for beamed Gamma–Ray Burst (GRB) sources. Prompt x-rays are inevitable due to the less highly blueshifted photons emitted at angles ∼> 1/γ relative to the beam symmetry axis, where γ is the expansion Lorentz factor. The observed flux depends on the combinations γ∆θ and γθv, where ∆θ is the beaming angle and θv is the viewing ...
We construct radiative equilibrium models for strongly magnetized (B ∼> 10 G) neutron-star atmospheres taking into account magnetic free-free absorption and scattering processes computed for two polarization modes. We include the effects of vacuum polarization in our calculations. We present temperature profiles and the angle-, photon energy-, and polarization-dependent emerging intensity for a...
A simple physical model for long-duration gamma ray bursts (GRBs) is used to fit the redshift (z) and the jet opening-angle distributions measured with earlier GRB missions and with Swift. The effect of different sensitivities for GRB triggering is sufficient to explain the difference in the z distributions of the pre-Swift and Swift samples, with mean redshifts of 〈z〉 ∼= 1.5 and 〈z〉 ∼= 2.7, re...
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