نتایج جستجو برای: ism band
تعداد نتایج: 140400 فیلتر نتایج به سال:
Body-area networks (BAN) are used in applications such as smart health monitoring, elderly care and biotelemetry. In the bio telemetric system decisive component is wearable antenna that aid off body communication. work undertaken, circularly polarized rectangular patch integrated with microwave band pass filter (BPF) circuit realized using fourth order hairpin line resonators. The filtering op...
The middle-aged supernova remnant (SNR) N49B in the Large Magellanic Cloud has been observed with the Chandra X-Ray Observatory. The superb angular resolution of Chandra resolves the complex structure of X-ray emitting filaments across the SNR. All observed features are soft (E < 3 keV) and we find no evidence for either point-like or extended hard emission within the SNR. Spectral lines from O...
We discuss the likely sources of turbulence in the ISM and explicitly calculate the detailed grand source function for the conventional sources of turbulence from supernovae, superbubbles, stellar winds and HII regions. We nd that the turbulent pumping due to the grand source function is broad band, consequently expanding the inertial range of the cascade. We investigate the general properties ...
We present Far Ultraviolet Spectroscopic Explorer (FUSE) and Space Telescope Imaging Spectrograph observations of the weak interstellar N I λ1160 doublet toward 17 high-density sightlines [N(Htot) ≥ 10 21 cm]. When combined with published data, our results reveal variations in the fractional N I abundance showing a systematic deficiency at large N(Htot). At the FUSE resolution (∼ 20 km s) the e...
Since the beginning of the IEEE 802.11 technology its channel access in ISM bands was governed by simple rules to ensure fairness and co-existence: such as upper ceiling on maximum transmitted power, moderate out-of-band emission masks and requirement for tolerance to interference. However, over time these rules became outdated and no longer well suited for current capabilities of devices opera...
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