Results 101 to 110 of about 554,039 (299)

Percutaneous device closure of patent foramen ovale using the premere occlusion device: initial experience, procedural, and intermediate-term results

, 2012
Background. Percutaneous device closure is a therapeutic option in patients with presumed stroke complicating paradoxical emboli. Newer devices with lower profiles and potentially reduced thrombogenicity have emerged, such as the Premere PFO occlusion
Bhagwandeen, Rohan, Ng, Kevin, Attia, John, Collins, Nick J, Jayasinghe, Rohan, Oldmeadow, Chris, Hatton, Rachael   +6 more
core  

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

Scalable Device-to-Device Communications ForFrequency Reuse >> 1

Proximity based applications are becoming fastgrowing markets suggesting that Device-to-Device (D2D) communicationsis becoming an essential part of future mobiledata networks.
Miao, Guowang
core   +2 more sources

Improving Device-to-Device communications pairing for underlay cellular networks

, 2017
Device-to-Device (D2D) communication is a promising technology for LTE-A and future 5G cellular systems to provide proximity services especially for public safety and emergency scenarios.
Khoa, Tran Anh, Giovanni Giambene, null Tran Anh Khoa, Giambene, Giovanni   +3 more
core   +1 more source

Exploiting Backscatter-Aided Relay Communications with Hybrid Access Model in Device-to-Device Networks [PDF]

, 2019
© 2015 IEEE. The backscatter and active RF radios can complement each other and bring potential performance gain. In this paper, we envision a dual-mode radio structure that allows each device to make smart decisions on mode switch between backscatter ...
Gao, L, Niyato, D, Xu, J, Hoang, DT, Gong, S, Guo, Y   +5 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

Wi-Fi Assisted Contextual Multi-Armed Bandit for Neighbor Discovery and Selection in Millimeter Wave Device to Device Communications. [PDF]

Sensors (Basel), 2021
Hashima S, Hatano K, Kasban H, Mahmoud Mohamed E.   +3 more
europepmc   +1 more source

Virtual MIMO Beamforming and Device Pairing Enabled by Device-to-Device Communications for Multidevice Networks [PDF]

, 2017
We consider a multidevice network with asymmetric antenna configurations which supports not only communications between an access point and devices but also device-to-device (D2D) communications for the Internet of things. For the network, we propose the
Yun Hee Kim, Jooheum Yoon, Yeonjin Jeong, Sang Hyun Lee   +3 more
core   +1 more source

Luminescence and Photochromism in Lanthanide‐Doped Hackmanites

Advanced Optical Materials, EarlyView.
Lanthanide‐doped lithium hackmanite derivatives are prepared utilizing a doped LiAlSiO4 precursor to modify luminescent and photochromic properties. Upon UV excitation, europium doping results in green Eu2+ persistent luminescence from shallow traps. Contrarily, samarium doping induces unusual near‐infrared photochromism.
Joshua Baggott, Minnea Tuomisto, J. A. Gareth Williams, Sari Granroth, Ermei Mäkilä, Ari Väisänen, Jani O. Moilanen, Mika Lastusaari   +7 more
wiley   +1 more source

Many-To-Many Matching with Externalities for Device-To-Device Communications

, 2017
In this letter, we aim to solve the resource allocation problem for device-To-device (D2D) communications underlaying cellular networks. Particularly, multiple D2D pairs are allowed to reuse the same resource block (RB), and one D2D pair is allowed to ...
Zhao, Jingjing, Elkashlan, Maged, Liu, Yuanwei, Chen, Yue, Chai, Kok Keong   +4 more
core   +1 more source