Results 101 to 110 of about 213,499 (265)

Research and development of backscatter communications technology

Dianxin kexue
As an important technology for the deployment of Internet of things (IoT), backscatter communication performs low-power passive communication and energy harvesting by applying the incident signals, which is expected to achieve energy self-sustainability ...
Yinghui YE, Rui XU, Yujia TIAN, Guangyue LU   +3 more
doaj   +2 more sources

Exciton Radiative Lifetimes in Hexagonal Diamond Ge and SixGe1–x Alloys

Advanced Optical Materials, EarlyView.
Strong room‐temperature photoluminescence reported in hexagonal Ge conflicts with theory predicting a nearly dark band edge. First‐principles calculations of excitonic radiative lifetimes fill a key gap in this debate, showing that pristine hexagonal Ge remains intrinsically weakly emissive, while Si alloying only modestly shortens the lifetime and ...
Michele Re Fiorentin, Michele Amato, Maurizia Palummo   +2 more
wiley   +1 more source

The Future of Education Research Journals: Challenges and responses

Education Policy Analysis Archives, 2014
This special issue of Education Policy Analysis Archives addresses scholarly production and publishing (the two are intimately related) in the field of education.
David Post
doaj   +1 more source

Wireless-powered device-to-device communications with ambient backscattering : performance modeling and analysis

, 2017
The recent advanced wireless energy harvesting technology has enabled wireless-powered communications to accommodate wireless data services in a self-sustainable manner.
Xiao Lu, Hai Jiang, Zhu Han, Niyato, Dusit, Lu, Xiao, Jiang, Hai, Kim, Dong In, Han, Zhu, Dusit Niyato, Dong In Kim   +9 more
core   +1 more source

Probing Near‐Field EM Fluctuations in Superparamagnetic CoFeB With NV Quantum Dephasometry

Advanced Optical Materials, EarlyView.
We non‐invasively investigate the superparamagnetic spin dynamics of a 1.1 nm CoFeB layer by probing its near‐field EM fluctuations using NV centers‐based quantum dephasometry. Our findings are further supported by theoretical modeling and SQUID‐based magnetization characterization. These results provide critical insight into the magnetization dynamics
Shoaib Mahmud, Wei Zhang, Pronoy Das, Angshuman Deka, Wenbo Sun, Zubin Jacob   +5 more
wiley   +1 more source

Sparse Beamforming for an Ultradensely Distributed Antenna System With Interlaced Clustering

IEEE Access, 2019
Recently, a novel network architecture for a distributed antenna system with interlaced clustering has been proposed to mitigate the cell-edge problem. Under this network architecture, we propose a more practical implementation for ultradensely deployed ...
Xinjiang Xia, Yu Zhang, Jiamin Li, Pengcheng Zhu, Yuanxue Xin, Dongming Wang, Xiaohu You   +6 more
doaj   +1 more source

On Unified Vehicular Communications and Radar Sensing in Millimeter-Wave and Low Terahertz Bands

, 2019
Future smart vehicles will incorporate high-data-rate communications and high-resolution radar sensing capabilities operating in the millimeter-wave and higher frequencies.
Valkama, Mikko, Fodor, G. (Gabor), Valkama, M. (Mikko), Andreev, Sergey, Petrov, V. (Vitaly), Koucheryavy, Y. (Yevgeni), Lehtomaki, Janne,, Juntti, Markku, Petrov, Vitaly, Koucheryavy, Yevgeni,, Moltchanov, D. (Dmitri), Andreev, S. (Sergey), Andreev, Sergey,, Fodor, Gabor,, Petrov, Vitaly,, Valkama, Mikko,, Juntti, Markku,, Moltchanov, Dmitri, Moltchanov, Dmitri,, Lehtomaki, Janne, Kokkoniemi, Joonas, Lehtomäki, J. (Janne), Kokkoniemi, Joonas,, Kokkoniemi, J. (Joonas), Juntti, M. (Markku), Koucheryavy, Yevgeni, Fodor, Gabor   +26 more
core   +1 more source

Spacer‐Less Substrate‐Integrated Metasurface for Near‐Unity Terahertz Absorption

Advanced Optical Materials, EarlyView.
ABSTRACT Although conventional metal‐insulator‐metal (MIM) terahertz (THz) absorbers can provide near‐unity absorption, their multilayer stacks inevitably introduce additional thickness, mass, and residual stress, which limit their compatibility with THz thermal sensing platforms.
Zihao Zhao, Kazuho Harada, Qian Liu, Isao Morohashi, Xu Fang, Kazuhiko Hirakawa, Ya Zhang   +6 more
wiley   +1 more source

Communications in Transportation Research: Vision and scope

Communications in Transportation Research, 2021
Xiaobo Qu, Shuaian Wang
doaj   +1 more source

Results analysis of the regional research competition for secondary school students using information and communications technology

Вестник Самарского государственного технического университета. Серия: Психолого-педагогические науки, 2019
The article deals with specific issues relating to the implementation of one of the priority directions of state policy of Russia is to work with gifted young people.
Zulfiya F. Kamaldinova, Nadezda V. Kulikova   +1 more
doaj   +1 more source