Results 81 to 90 of about 36,392 (267)
Concurrent transmission mechanism to mitigate pan-exposed-node problems in wireless sensor networks
International Journal of Distributed Sensor Networks, 2017 Power control technology is widely used in wireless sensor networks to improve network performance. The asymmetric transmission power strategy used in power control technology causes the re-emergence of hidden-node problems and more serious exposed-node ...
Xuejian Zhao +4 more
doaj +1 more source
n‐Type Polymer Radio Frequency Rectifiers Operating at 18.5 GHz
Advanced Materials, EarlyView.Combining an n‐doped polymer semiconductor with wafer‐scale asymmetric planar electrodes featuring work function‐engineered contacts yields radio‐frequency diodes and rectifying circuits operating at up to 18.5 GHz. The devices combine scalable manufacturing with an operating frequency previously unattainable by large‐area organic electronics ...
Lazaros Panagiotidis +19 more
wiley +1 more source
International Journal of Distributed Sensor Networks, 2015 This paper presents an opportunistic reception (OR) algorithm for energy-efficient transmission in cooperative wireless sensor networks (WSNs), where the characteristics of random linear network coding and the energy consumption property of WSNs are ...
Yulun Cheng, Longxiang Yang
doaj +1 more source
IEEE Access, 2018 Network virtualization (NV) is one crucial attribute for the next-generation network. Virtual network embedding (VNE) is known to be the resource allocation problem in NV content.
Haotong Cao +5 more
doaj +1 more source
Security in wireless sensor networks
Communications of the ACM, 2004 They are susceptible to a variety of attacks, including node capture, physical tampering, and denial of service, while prompting a range of fundamental research challenges.
Perrig, Adrian +2 more
openaire +2 more sources
Resonant Domain Wall Dynamics in a Three‐Dimensional Magnetic Nano Double Helix
Advanced Materials, EarlyView.3D magnetic nanostructures promise exciting possibilities for magnetization dynamics. However, experimental realizations remain scarce. In nanoprinted cobalt double helices, time‐resolved X‐ray microscopy reveals harmonic domain wall dynamics. Simulations identify the mode and additional higher‐frequency resonances, revealing a rich dynamic landscape ...
Pamela Morales‐Fernández +15 more
wiley +1 more source
Multimodal fusion recognition for digital twin
Digital Communications and NetworksThe digital twin is the concept of transcending reality, which is the reverse feedback from the real physical space to the virtual digital space. People hold great prospects for this emerging technology.
Tianzhe Zhou +3 more
doaj +1 more source
IEEE Access, 2018 Non-orthogonal multiple access (NOMA) is one of the promising radio access techniques in 5G communication networks. In this paper, a cooperative NOMA relaying scheme with two-phase superposition coding is proposed to enhance the performance of NOMA ...
Yingying Zhang +3 more
doaj +1 more source
Underwater Wireless Sensor Networks
International Journal of Distributed Sensor Networks, 2014 1 School of Computer Science & Engineering, Kyungpook National University, Daegu, Republic of Korea 2Universidad Politecnica de Valencia, Camino de Vera, S/N, 46022 Valencia, Spain 3 South Dakota State University, DEH (Old ECS) 123, Brookings, SD 57007, USA 4Department of Informatics, Electronic and Sistemistic, University of Calabria, Italy 5 ...
Dongkyun Kim +4 more
openaire +2 more sources
Space‐Time Coding Conformal Metasurfaces for Multifrequency Beam Steering and Shaping
Advanced Materials, EarlyView.Space‐time coding conformal metasurfaces enable dynamic wave control on curved surfaces by combining programmable spatial patterns with temporal modulation. This study shows that a single conformal aperture can independently manipulate multiple frequency components, achieving multifunctional beam shaping and steering, with implications for ...
Filippo Pepe +8 more
wiley +1 more source