Results 81 to 90 of about 2,859,377 (342)

Features of radio communication organization in lugging areas [PDF]

BIO Web of Conferences
: in order to ensure stable communication between subscribers at a considerable distance in the process of logging in hard-to-reach areas with complex terrain, at logging enterprises, between the dispatcher and structural units, as well as the ...
Zhaivoronok Denis, Novikov Aleksey, Terehina Irina, Shakina Fatma   +3 more
doaj   +1 more source

Electroactive Metal–Organic Frameworks for Electrocatalysis

Advanced Functional Materials, EarlyView.
Electrocatalysis is crucial in sustainable energy conversion as it enables efficient chemical transformations. The review discusses how metal–organic frameworks can revolutionize this field by offering tailorable structures and active site tunability, enabling efficient and selective electrocatalytic processes.
Irena Senkovska, Yutong Luo, Ruyan Zhao, Jianjun Zhang, Mingchao Wang, Xinliang Feng, Eike Brunner, Stefan Kaskel   +7 more
wiley   +1 more source

The Front end of Software-Defined Radio: Possibilities and Challenges [PDF]

, 2001
The use of mobile telephony has shown a spectacular\ud growth in the last 10 years. A side effect of this rapid\ud growth is an excess of mobile system standards.
Hoeksema, F.W., Schiphorst, R., Slump, C.H.   +2 more
core   +4 more sources

Use of Hidden Markov Model Technique to Characterize and Classify the Wideband Mobile Radio Channel in Different Environments

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
Mobile radio channel and its effects on the radio link path place fundamental limitations on the performance of wireless communication systems. This paper sets out a new approach for wideband modeling of mobile radio channels to classify distinct ...
Rafael S. Azevedo, Edson Cataldo, Leni J. Matos   +2 more
doaj   +1 more source

Photoswitching Conduction in Framework Materials

Advanced Functional Materials, EarlyView.
This mini‐review summarizes recent advances in state‐of‐the‐art proton and electron conduction in framework materials that can be remotely and reversibly switched on and off by light. It discusses the various photoswitching conduction mechanisms and the strategies employed to enhance photoswitched conductivity.
Helmy Pacheco Hernandez, Stefan Hecht, Wolfgang Wenzel, Lars Heinke, Mariana Kozlowska   +4 more
wiley   +1 more source

ESTIMATION THE LOCATION PARAMETERS IN MOTION OF RADIO EMISSION SOURCE OF ELECTROMAGNETIC WAVE’S SPHERICAL FRONT

Information and Telecommunication Sciences, 2017
Background. Modern methods for determining the position of the source of radio emission in the Fresnel zone from the sphericity of the electromagnetic wave front received by the linear antenna array allow solving the problem of simultaneous determination
Evgeniy Yakornov, Oleg Tsukanov
doaj   +1 more source

A Bespoke Programmable Interpenetrating Elastomer Network Composite Laryngeal Stent for Expedited Paediatric Laryngotracheal Reconstruction

Advanced Functional Materials, EarlyView.
A programmable interpenetrating double‐network architecture, created via 3D‐TIPS printing and resin infusion, synergistically combines thermoplastic and thermosetting elastomers to balance structural rigidity and surface softness—crucial for paediatric laryngeal stents.
Elizabeth F. Maughan, Lei Wu, Dong Zhang, Linxiao Wu, Graca Ferreira Vaz Pinto Mendes, Wanqiao J. Tu, Heping Ma, Toby J. Proctor, Colin R. Butler, Thomas Kjærgaard, Mark W. Lowdell, Martin A. Birchall, Robert E. Hynds, Richard Hewitt, Wenhui Song   +14 more
wiley   +1 more source

MOFs and COFs in Electronics: Bridging the Gap between Intrinsic Properties and Measured Performance

Advanced Functional Materials, EarlyView.
Metal‐organic frameworks (MOFs) and covalent organic frameworks (COFs) hold promise for advanced electronics. However, discrepancies in reported electrical conductivities highlight the importance of measurement methodologies. This review explores intrinsic charge transport mechanisms and extrinsic factors influencing performance, and critically ...
Jonas F. Pöhls, R. Thomas Weitz
wiley   +1 more source

Mobile satellite services for public safety, disaster mitigation and disaster medicine [PDF]

Between 1967 and 1987 nearly three million lives were lost and property damage of $25 to $100 billion resulted form natural disasters that adversely affected more than 829 million people.
Freibaum, Jerry
core   +1 more source

Definition of a parameter for a typical specific absorption rate under real boundary conditions of cellular phones in a GSM networkd [PDF]

Advances in Radio Science, 2003
Using cellular phones the specific absorption rate (SAR) as a physical value must observe established and internationally defined levels to guarantee human protection.
D. Gerhardt
doaj