Results 51 to 60 of about 61,720 (247)
Advanced Functional Materials, EarlyView.A laser‐driven strategy enables precise microstructural modulation of Mo₂C, achieving nanoscale grain control (15.6 ± 5 nm) and an ultrahigh grain boundary density (130 µm−1). Moreover, high‐angle grain boundaries enhance active sites, facilitate electron transport, and optimize hydrogen adsorption kinetics, significantly reducing overpotential.
Seok‐Ki Hyeong +13 more
wiley +1 more source
Enhanced two-antenna structures for universal mobile telecommunications system diversity terminals
IET Microwaves, Antennas & Propagation, 2008 The design of several universal mobile telecommunications system multi-antenna systems with radiators having a high isolation, a high total efficiency and a low envelope correlation is presented. First, two planar inverted-F antennas (PIFAs), closely positioned at the top edge of a small ground plane whose size is representative of the printed circuit ...
Diallo, Aliou +4 more
openaire +4 more sources
3G networks in emergency telemedicine - An in-depth evaluation & analysis [PDF]
, 2005 The evolution of telecommunications technologies in connection with the robustness and the fidelity these new systems provide, have opened up many new horizons as regards the provision of healthcare and the quality of service from the side of the experts
Banitsas, KA +3 more
core +1 more source
Advanced Materials, EarlyView.In this review, the recent development of deep‐blue (≤465 nm) perovskite light‐emitting diodes (PeLEDs) are summarized, using different perovskite nanomaterials, including nanocrystals (NCs), quantum dots (QDs), nanoplatelets (NPLs), quasi‐2D thin film, 3D bulk thin film, as well as lead‐free perovskite nanomaterials.
Pui Kei Ko +6 more
wiley +1 more source
Light‐Emitting Diodes Based on Metal Halide Perovskite and Perovskite Related Nanocrystals
Advanced Materials, EarlyView.The review covers the past and current developments in light‐emitting diodes (LEDs) exploiting nanocrystals of halide perovskites and perovskite‐related materials. The review examines the aspects of material optimizations, device engineering, and applications.
Ying Liu +7 more
wiley +1 more source
Journal of Diabetes, Volume 15, Issue 1, Page 47-57, January 2023., 2023 Highlights Mobile health (mHealth) is an emerging forefront in patient‐centric care. Efficacy of mHealth interventions on health outcomes among older adults with type 2 diabetes is limited. Modest benefits on cardiometabolic outcomes with mHealth interventions have uncovered critical gaps in the field and offered insights to address barriers at hand ...
Jovin Jie Ning Lee +11 more
wiley +1 more source
Satellite Quantum Communication via the Alphasat Laser Communication Terminal [PDF]
, 2015 By harnessing quantum effects, we nowadays can use encryption that is in principle proven to withstand any conceivable attack. These fascinating quantum features have been implemented in metropolitan quantum networks around the world. In order to interconnect such networks over long distances, optical satellite communication is the method of choice ...
arxiv +1 more source
Further Improvements on Approximating the Uniform Cost-Distance Steiner Tree Problem [PDF]
arXiv, 2022 In this paper, we consider the Uniform Cost-Distance Steiner Tree Problem in metric spaces, a generalization of the well-known Steiner tree problem. Cost-distance Steiner trees minimize the sum of the total length and the weighted path lengths from a dedicated root to the other terminals, which have a weight to penalize the path length.
arxiv
Demonstration of a Graphene Adjustable‐Barriers Phototransistor with Tunable Ultra‐High Responsivity
Advanced Optical Materials, EarlyView.A novel graphene‐based phototransistor with a tunable ultra‐high responsivity of 1.7 x 107 AW−1 has been demonstrated. Due to the selected material combination of amorphous silicon, graphene and n‐germanium, the device is potentially capable of dual‐band detection in the VIS‐IR range.
Carsten Strobel +5 more
wiley +1 more source
5G cellular systems supported by UAVs, RESs, and RISs (PL: Systemy komórkowe 5G wspierane przez BSP, OZE oraz IPR) [PDF]
Telecommunication Review - Telecommunication News, 2023, no. 4,
pp. 97-100The paper considers energy consumption in 5G cellular networks powered by Renewable Energy Sources (RESs) and equipped with Reconfigurable Intelligent Surfaces (RISs) and tethered Unmanned Aerial Vehicles (UAVs), acting as mobile access points. The study was focused on the energy side of the Radio Access Network (RAN) located in the city of Pozna\'n in
arxiv +1 more source