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Author |
Столяров, А. В. |
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Title |
Программирование. Введение в профессию. Том 3. Системы и сети |
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2017 |
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МАКС Пресс |
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programming, computer science |
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Abstract |
В третий том книги «Программирование: введение в профессию» вошли части V–VIII. В части V рассматриваются системные вызовы для ввода-вывода, управление процессами, механизмы взаимодействия процессов, такие как сигналы и каналы, а также понятие терминала и связанные с ним явления, в том числе сеансы и группы процессов, виртуальные терминалы, управление дисциплиной линии. Часть VI посвящена компьютерным сетям; даётся небольшой обзор протоколов, используемых в сети Интернет, рассмотрена подсистема сокетов и событийно-ориентированное построение серверных программ. В части VII рассматриваются вопросы, связанные с разделяемыми данными, критические секции, взаимоисключение; даются базовые сведения о библиотеке pthread. Часть VIII содержит ряд сведений о внутреннем устройстве операционной системы; в частности, рассматриваются различные модели виртуальной памяти, подсистема ввода-вывода и т.п. |
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Москва |
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978-5-317-05606-3 |
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1136 |
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Author |
Столяров, А. В. |
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Title |
Программирование. Введение в профессию. Примеры программ |
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Miscellaneous |
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2017 |
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1137 |
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Wördenweber, Roger; Moshchalkov, Victor; Bending, Simon; Tafuri, Francesco (eds) |
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Superconductors at the nanoscale. From basic research to applications |
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2017 |
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Walter de Gruyter GmbH |
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Berlin/Boston |
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Wördenweber, Roger; Moshchalkov, Victor; Bending, Simon; Tafuri, Francesco |
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978-3-11-045620-2 |
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Page shift = 14 |
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1139 |
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Author |
Seliverstov, Sergey V.; Rusova, Anastasia A.; Kaurova, Natalya S.; Voronov, Boris M.; Goltsman, Gregory N. |
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Title |
AC-biased superconducting NbN hot-electron bolometer for frequency-domain multiplexing |
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Conference Article |
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2017 |
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Proc. 28th Int. Symp. Space Terahertz Technol. |
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Proc. 28th Int. Symp. Space Terahertz Technol. |
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120-122 |
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NbN HEB mixer |
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We present the results of characterization of fast and sensitive superconducting antenna-coupled THz direct detector based on NbN hot-electron bolometer (HEB) with AC-bias. We discuss the possibility of implementation of the AC-bias for design the readout system from the multi-element arrays of HEBs using standard technique of frequency-domain multiplexing. We demonstrate experimentally that this approach does not lead to significant deterioration of the HEB sensitivity compared with the value obtained for the same detector with DC- bias. Results of a numerical calculations of the HEB responsivity at AC-bias are in a good agreement with the experiment. |
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1174 |
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Author |
Antipov, S.; Trifonov, A.; Krause, S.; Meledin, D.; Desmaris, V.; Belitsky, V.; Gol’tsman, G. |
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Title |
Gain bandwidth of NbN HEB mixers on GaN buffer layer operating at 2 THz local oscillator frequency |
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Conference Article |
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Year |
2017 |
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Proc. 28th Int. Symp. Space Terahertz Technol. |
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Proc. 28th Int. Symp. Space Terahertz Technol. |
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147-148 |
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NbN HEB mixers, GaN buffer-layer, IF bandwidth |
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In this paper, we present IF bandwidth measurement results of NbN HEB mixers, which are employing NbN thin films grown on a GaN buffer-layer. The HEB mixers were operated in the heterodyne regime at a bath temperature of approximately 4.5 K and with a local oscillator operating at a frequency of 2 THz. A quantum cascade laser served as the local oscillator and a reference synthesizer based on a BWO generator (130-160 GHz) and a semiconductor superlattice (SSL) frequency multiplier was used as a signal source. By changing the LO frequency it was possible to record the IF response or gain bandwidth of the HEB with a spectrum analyzer at the operation point, which yielded lowest noise temperature. The gain bandwidth that was recorded in the heterodyne regime at 2 THz amounts to approximately 5 GHz and coincides well with a measurement that has been performed at elevated bath temperatures and lower LO frequency of 140 GHz. These findings strongly support that by using a GaN buffer-layer the phonon escape time of NbN HEBs can be significantly lower as compared to e.g. Si substrate, thus, providing higher gain bandwidth. |
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1175 |
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