Results 91 to 100 of about 109,932 (312)

ZeroMAC: Toward a zero sleep delay and zero idle listening media access control protocol with ultralow power radio frequency wakeup sensor

International Journal of Distributed Sensor Networks, 2017
In wireless sensor networks, duty cycling has been an imperative choice to reduce idle listening but it introduces sleep delay. To break through the energy-latency tradeoff, we propose a pair of a radio wave sensor called radio frequency wakeup sensor ...
Sang Hoon Lee, Lynn Choi
doaj   +1 more source

Intervehicle communication research – communication scenarios

Mokslas: Lietuvos Ateitis, 2010
Recently intervehicle communications are attracting much attention from industry and academia. Upcoming standard for intervehicle communication IEEE 802.11p, known as Wireless Access in Vehicular Environments (WAVE), is still in its draft stage, but ...
Šarūnas Stanaitis
doaj   +1 more source

Highly Anisotropic Quasi‐Direct Organic Metal Halide Hybrids: A Platform for Polarization‐Sensitive Optoelectronics

Advanced Materials Technologies, EarlyView.
One‐dimensional C4N2H14PbBr4 is shown to have a quasi‐direct electronic band structure and strongly anisotropic transport with polarized broadband emission. A GW/Bethe–Salpeter excited‐state force formalism, supported by polarized Raman and temperature‐dependent photoluminescence, identifies low–frequency Pb–Br phonons that drive ultrafast exciton self‐
Rijan Karkee, Rafael R. Del Grande, Yeonjoo Lee, Jinkyoung Yoo, Azza Ben‐Akacha, Biwu Ma, Michael T. Pettes, David A. Strubbe   +7 more
wiley   +1 more source

Energetic electron precipitation during substorm injection events: High-latitude fluxes and an unexpected midlatitude signature [PDF]

, 2008
Geosynchronous Los Alamos National Laboratory (LANL-97A) satellite particle data, riometer data, and radio wave data recorded at high geomagnetic latitudes in the region south of Australia and New Zealand are used to perform the first complete modeling ...
Menk, F. W., Menk, F.W., Neil. R. Thomson, Brundell, J.B., Annika Seppälä, John Bähr, Reiner H. W. Friedel, Neil Cobbett, Tracy Moffat‐Griffin, Andrew J. Kavanagh, Craig J. Rodger, Brundell, J., Kavanagh, Andrew J., Rodger, C. J., James Brundell, Seppälä, A., Kavanagh, A.J., Friedel, R.H.W., Thomson, N. R., Bähr, J., Clilverd, M. A., Rodger, C.J., Friedel, R. W. H., Moffat-Griffin, T., Thomson, N.R., Frederick W. Menk, Cobbett, N., Clilverd, M.A., Mark A. Clilverd   +28 more
core   +1 more source

Coupling of Er3+ ions and Plasmonic Modes in Vertical Nanocavities for Spectral Broadening in Telecom Bands

Advanced Materials Technologies, EarlyView.
Left: Illustration of the glass & nanostructures system and the NIR emission at 1.5 µm, where the colored spheres represent the Er3+ ions within the doped glass. Right: Representation of the Stark splitting of the 4I13/2 and 4I15/2 manifolds of the Er3+, illustrating how the plasmonic modes facilitate the emission from the broader Stark manifold ...
Gaston Lozano Calderón, Víctor Anthony García Rivera, Stéphan Cagnon, Souleymane Toubou Bah, Younès Messaddeq, Euclydes Marega Junior   +5 more
wiley   +1 more source

Journalism as research: Developing radio documentary theory from practice [PDF]

, 2011
Journalism academics around the world face the challenge of having their journalism practice recognised as academic research. This dissertation presents a model of how journalism practitioner-academics can present their in-depth journalistic practice in ...
Lindgren, Mia
core   +1 more source

Flexible Pressure Sensor With Co‐Optimized Sensitivity and Linearity Based on Gradient Toroidal Microstructures

Advanced Materials Technologies, EarlyView.
A flexible piezoresistive pressure sensor with gradient toroidal CNT/PDMS microstructures is reported. The hierarchical geometry enables sequential electrode contact, achieving a sensitivity of 256.20 kPa−1 and linear response (R2 = 0.99) over 0–1000 kPa.
Rongmei Wang, Ruolin Liu, Ming Lei, Yifan Liu, Fengming Hu, Bing Ji, Chao Peng, Jianyi Luo, Bingpu Zhou   +8 more
wiley   +1 more source

A Full-Duplex Diversity-Assisted Hybrid Analogue/Digitized Radio Over Fibre for Optical/Wireless Integration [PDF]

A duplex Radio Over Fibre (ROF) ring architecture is proposed taking into account the constraints imposed by the cost of fibre laying and of the optical/electronic components, as well as the spectral efficiency and the duplex link performance.
Thomas, Varghese Antony, El-Hajjar, Mohammed, Hanzo, Lajos, Ghafoor, Salman   +3 more
core  

Upcycling Compact Discs Into Ultra‐Stable, Flexible, and Stretchable Nanoporous Gold Electrodes for Enhanced Biosensing Performance

Advanced Materials Technologies, EarlyView.
This article highlights the development of robust and high‐performance flexible and stretchable biosensors that maintain long‐term functionality and optimal electrical conductivity under mechanical deformation, utilizing sustainable and cost‐effective manufacturing principles.
Mousa H. Aldosari, Ahyeon Koh
wiley   +1 more source

Radio channel characterisation and system-level modelling for ultra wideband body-centric wireless communications [PDF]

, 2012
PhDThe next generation of wireless communication is evolving towards user-centric networks, where constant and reliable connectivity and services are essential.
Abbasi, Qammer Hussain
core