نتایج جستجو برای: broadband meter
تعداد نتایج: 50726 فیلتر نتایج به سال:
A 1-meter telescope with a coronagraph (with 10 suppression) placed in the focal area of the solar gravitational lens (SGL) can image an exoplanet at the distance up to 100 light years with a kilometer-scale resolution on its surface. In addition, spectroscopic broadband signal-to-noise ratio is ~10 in 2 weeks of integration time, providing this instrument with incredible remotesensing capabili...
The optical fiber power meter (OFPM) is perhaps the most common type of test equipment used to support the development and implementation of optical fiber systems. To address the inherent metrology requirements, NIST has developed and implemented measurement services to help characterize these instruments [1]. These measurement services consist primarily of absolute laser power calibrations usi...
Broadband UV measurements are evaluated when UV-A irradiance meters measure optical radiation from 365 nm UV sources. The CIE standardized rectangular-shape UV-A function can be realized only with large spectral mismatch errors. The spectral power-distribution of the 365 nm excitation source is not standardized. Accordingly, the readings made with different types of UV meters, even if they meas...
In this paper we investigate the effects of broadband infrastructure providing high speed internet, on economic growth in developing countries. We have used two different broadband measures to classify developing countries into two groups for the period 1999-2008. By using logistic diffusion model and IV approach, a nonlinear diffusion model is specified. Differences in ceiling of diffusion cur...
The search for a simple broadband, multiband antenna with acceptable SWR over the entire 80/75-meter band continued with the publication of the article by Witt, AI1H, in April 1989 QST. This inspired author Belrose, VE2CV, to reopen his files on the "Windom antenna," or, more properly, the off-center-fed dipole. Particularly since the opening of the 10, 18 and 24-MHz bands, this time-honored, s...
The successful utilization of an ion channel in a plasma to wiggle a 28.5-GeV electron beam to obtain broadband x-ray radiation is reported. The ion channel is induced by the electron bunch as it propagates through an underdense 1.4-meter-long lithium plasma. The quadratic density dependence of the spontaneously emitted betatron x-ray radiation and the divergence angle of approximately (1-3)x10...
in this paper we investigate the effects of broadband infrastructure providing high speed internet, on economic growth in developing countries. we have used two different broadband measures to classify developing countries into two groups for the period 1999-2008. by using logistic diffusion model and iv approach, a nonlinear diffusion model is specified. differences in ceiling of diffusion cur...
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