Results 51 to 60 of about 459,013 (263)

Joint Beamforming and Trajectory Optimization for Intelligent Reflecting Surfaces-Assisted UAV Communications

IEEE Access, 2020
Unmanned aerial vehicle (UAV) and intelligent reflecting surface (IRS) are anticipated to be widely applied for improving the spectrum and energy efficiency in the forthcoming wireless communication systems.
Linghui Ge, Peihao Dong, Hua Zhang, Jun-Bo Wang, Xiaohu You   +4 more
doaj   +1 more source

Community-Lab: Overview and invitation to the research community [PDF]

2012 IEEE 12th International Conference on Peer-to-Peer Computing (P2P), 2012
Community-Lab is an open, distributed infrastructure for researchers to experiment with Community Networks, that are large scale, self-organized and decentralized networks and services built and operated by citizens for citizens. The goal of Community-Lab is to advance research and empower society by understanding and removing obstacles for these ...
Navarro Moldes, Leandro, Escrich, Pau, Baig Viñas, Roger, Neumann, Axel   +3 more
openaire   +2 more sources

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

Performance of Ship-Based QKD Under the Influence of Sea-Surface Atmospheric Turbulence

Photonics
There are numerous studies on the effects of ocean turbulence on wireless optical communications and on satellite–ground quantum key distribution (QKD); however, there are few studies on the impact of near sea-surface turbulence on ship-based QKD ...
Gui-Ying Jiang, Ya-Ping Li, Xiao-Han Li, Wei-Dong Zhang, Zi-Ao Wan, Qi-Ming Zhu, Peng-Fei Gong, Song Zhang   +7 more
doaj   +1 more source

Energy Efficiency Optimization in Massive MIMO Secure Multicast Transmission

Entropy, 2020
Herein, we focus on energy efficiency optimization for massive multiple-input multiple-output (MIMO) downlink secure multicast transmission exploiting statistical channel state information (CSI). Privacy engineering in the field of communication is a hot
Bin Jiang, Linbo Qu, Yufei Huang, Yifei Zheng, Li You, Wenjin Wang   +5 more
doaj   +1 more source

Self‐Assembled Inorganic Nanomembrane Tubes: Rolled‐Up Piezoelectrics for Microacoustic Wave‐Based Actuators and Sensors

Advanced Materials, EarlyView.
This study demonstrates a self‐assembly process to generate free‐standing piezoelectric nanomembranes, forming ultracompact microtubular acoustic wave sensors and actuators. The miniaturized 3D piezoelectric platform reported in this work can be applied in telecommunication, energy harvesting, and acoustofluidics. Moreover, the 3D self‐assembly can add
Raphaël C. L‐M. Doineau, Christian N. Saggau, Stefan Baunack, Thomas Gemming, Yara Abdelaal, Robert Weser, Oliver G. Schmidt, Hagen Schmidt, Andreas Winkler, Mariana Medina‐Sánchez   +9 more
wiley   +1 more source

Spectrum-Efficient Coherent Photonic Terahertz Transmission System Based on Subcarrier Multiplexing With Offset Quadrature Amplitude Modulation

IEEE Photonics Journal
To overcome the spectral efficiency (SE) limitations of conventional subcarrier multiplexing (SCM) caused by guard bands, a spectrum-efficient coherent photonic terahertz (THz) transmission system based on SCM with offset quadrature amplitude modulation (
Zhuoxin Li, Jiao Zhang, Yutong Jiang, Siyu Zhu, Meng Liu, Jiaxuan Li, Ruizhe Xu, Xiaodong Wei, Shuang Gao, Junkai Mao, Min Zhu   +10 more
doaj   +1 more source

Survey of RF Communications and Sensing Convergence Research

IEEE Access, 2017
Wireless mediums, such as RF, optical, or acoustical, provide finite resources for the purposes of remote sensing (such as radar) and data communications.
Bryan Paul, Alex R. Chiriyath, Daniel W. Bliss   +2 more
doaj   +1 more source

Communication in the IS Community: A Call for Research and Design

Communications of the Association for Information Systems, 2004
Many in the IS community are aware of the importance of communication practices in building a sustainable community. Yet, surprisingly, little is known about the practices and perceptions of communication within our field. In this study, members of the ISWorld listserv were surveyed for their patterns of use and involvement, their opinions on the roles
Dov Te'eni, Andrew Schwarz
openaire   +2 more sources

Azobenzene's Cross‐Scale Optics and Photonics: Molecular Photoswitching, Mesoscopic Material Motions, and Adaptive Devices

Advanced Materials, EarlyView.
Azobenzene photoswitches translate molecular‐scale E/Z photoisomerization into macroscopic material responses and device‐level photonic functions. This Review highlights how azobenzene research has evolved from molecular photochemistry to photoalignment, mass migration, photomechanics, and heat release, ultimately enabling holography, reconfigurable ...
Heeju Son, Soyul Kwak, Heerin Noh, Minsang Kim, Doyeon Noh, Subhayan Chakraborty, Jaewon Lee, YongDeok Cho, Kyeongsoo Kim, Taewoong Eom, Moonyoung Kim, Jangwon Kim, Hoyoung Lee, Soyoung Lee, Jaehun Kim, Grace G. D. Han, Shin‐Tson Wu, Stefano Oscurato, Arri Priimagi, Marina Saphiannikova, Seungwoo Lee   +20 more
wiley   +1 more source