Results 81 to 90 of about 240,095 (308)
Радіоелектронні і комп'ютерні системи, 2018 The laboratory testbed of a digital simplex radio-relay system of the terahertz range has been studied for the first time in practical terms. It consists of the receiver and transmitter parts of 130÷134 GHz frequency range and a digital modem with a ...
Гліб Леонідович Авдєєнко +2 more
doaj +1 more source
A technology assessment of alternative communications systems for the space exploration initiative [PDF]
Telecommunications, Navigation, and Information Management (TNIM) services are vital to accomplish the ambitious goals of the Space Exploration Initiative (SEI).
Ponchak, Denise S. +4 more
core +1 more source
Advanced Science, EarlyView.In this work, ultrafast laser‐induced spin transfer and spin relaxation dynamics in 2D van der Waals antiferromagnetic CrI3/CrGeTe3 heterostructures are investigated. Laser excitation is demonstrated to induce pronounced interlayer nonequilibrium spin dynamics and ultrafast magnetic moment reconstruction, driving a transition from an antiferromagnetic (
Yang Wu +5 more
wiley +1 more source
Real-Time Status Update System in a Parallel Blocking Queue
IEEE Open Journal of the Communications SocietyMulti-path transmission is promising in improving the freshness of information received in status-updating systems. However, multi-path transmission results in out-of-order arrivals at the monitoring point, which poses significant challenges to the ...
Zhengchuan Chen +6 more
doaj +1 more source
Information and communication technologies for the poor: [PDF]
This brief is based on Information and Communication Technologies for Development and Poverty Reduction: The Potential of Telecommunications, ed. Maximo Torero and Joachim von Braun (Johns Hopkins University Press and IFPRI, 2006) "The variety of views ...
Torero, Maximo, von Braun, Joachim
core
Spatial‐Wavelength Multiplexing Error‐Controlled Photonic Analog Computing System
Advanced Science, EarlyView.A novel photonic integrated circuit prototype implementing the concept of general‐purpose analog computing and demonstrate its capability in radio frequency applications. The chip features a multichannel architecture and performs fully optical analog computation with frequency‐domain parallel processing. An FPGA‐based error‐correction algorithm aims to
Tao Zhu +15 more
wiley +1 more source
Impact of Power Allocation and Antenna Directivity in the Capacity of a Multiuser Cognitive Ad Hoc Network [PDF]
, 2012 This paper studies the benefits that power control and antenna directivity can bring to the capacity of a multiuser cognitive radio network. The main objective is to optimize the secondary network sum rate under the capacity constraint of the primary ...
Alfonso, V. +3 more
core +1 more source
Perspective: Hollow Core Optical Fibres for Ultraviolet and Visible Wavelengths
Advanced Science, EarlyView.Hollow core optical fibres bypass material constraints that limit optical fibres at ultraviolet and visible wavelengths. However, their challenging fabrication has limited their development, and significant gains in performance remain possible. In this perspective we outline approaches to enable the next generation of fibres for shorter wavelengths ...
Robbie Mears +5 more
wiley +1 more source
Search Result Clustering via Randomized Partitioning of Query-Induced Subgraphs
, 2008 In this paper, we present an approach to search result clustering, using partitioning of underlying link graph. We define the notion of "query-induced subgraph" and formulate the problem of search result clustering as a problem of efficient partitioning ...
Bradic, Aleksandar
core +1 more source
Study of Free‐Space Optical Quantum Network: Review and Prospectives
Advanced Science, EarlyView.Free from the constraints of fiber connections, free‐space quantum network enables longer and more flexible quantum network connections. This review summarizes and comparatively analyzes free‐space quantum network experiments based on ground stations, satellites, and mobile platforms.
Hua‐Ying Liu, Zhenda Xie, Shining Zhu
wiley +1 more source