Results 101 to 110 of about 464,477 (298)
Stereoselective Synthesis of β‐C‐glycosides From Exoglycals Through Radical C─C Bond Formation
Chemistry – A European Journal, EarlyView.We describe herein a convenient strategy for the preparation of β‐C‐glycosides via the addition of radical species onto exoglycals. This method is efficient, general and achieved in mild conditions starting from xanthates derivatives and using triethylborane as initiator and 4‐tert‐butylcatechol as hydrogen atom source. This hydroalkylation reaction is
Noémie Murard +2 more
wiley +1 more source
A Directional Antenna in a Matching Liquid for Microwave Radar Imaging
International Journal of Antennas and Propagation, 2015 The detailed design equations and antenna parameters for a directional antenna for breast imaging are presented in this paper. The antenna was designed so that it could be immersed in canola oil to achieve efficient coupling of the electromagnetic energy
Saeed I. Latif +5 more
doaj +1 more source
Complex Permittivity Measurements of Steel Fiber-Reinforced Cementitious Composites Using a Free-Space Reflection Method with a Focused Beam Lens Horn Antenna. [PDF]
Sensors (Basel), 2021 Cho K +5 more
europepmc +1 more source
Antenna Measurement System at 300 GHz for the Terasense Project [PDF]
, 2010 The aim of this paper is to introduce the design techniques used to develop the antenna measurement system for the Terasense Project. This project, funded by the Spanish Government, involves millimetre-wave systems design.
Muñoz Acevedo, Alfonso +2 more
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Investigation on tunnel stability considering pipe‐roof support with transparent soil technology
Deep Underground Science and Engineering, EarlyView.This study integrates transparent soil technology, 3D reconstruction and numerical simulation to captures the full‐field deformation of shield tunnel instability. Results demonstrate that pipe‐roof support enhances stability via the “soil‐arching barrier effect,” effectively restraining failure wedge development by extending stress transfer paths ...
Zhi Jia +4 more
wiley +1 more source
Performance Verification on UWB Antennas for Breast Cancer Detection
MATEC Web of Conferences, 2017 Breast cancer is a common disease among women and death figure is continuing to increase. Early breast cancer detection is very important. Ultra wide-band (UWB) is the promising candidate for short communication applications.
Vijayasarveswari V. +6 more
doaj +1 more source
RANCANG BANGUN ANTENA HORN UNTUK KOMUNIKASI SATELIT MIKRO
, 2005 Abstrak Makalah ini melaporkan desain antena horn untuk frekuensi 2220 MHz. Frekuensi tersebut digunakan pada satelit sistem komunikasi LAPAN TUBSAT. Antena horn yang didesain adalah piramid horn.
Wahyuni, Ghozali
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ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.A porous anion exchange layer (AEL) is implemented in a forward‐biased bipolar membrane CO2 electrolyzer to suppress carbonate crossover, support CO2 regeneration and maintain cathode alkalinity. Two fabrication strategies are compared—deposition on a silver gas diffusion electrode (GDE) or on the CEM—showing that a porous AEL‐coated GDE provides the ...
Henning Lorenz +3 more
wiley +1 more source
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.Recent advances in carbon‐based anodes for alkali metal‐ion batteries are critically reviewed, with emphasis on biphenylene and other emerging carbon allotropes. Biphenylene exhibits exceptional theoretical electrochemical properties beyond conventional graphite, highlighting its strong potential as a next‐generation anode material once scalable ...
Adewale Hammed Pasanaje, Nirpendra Singh
wiley +1 more source
Double ridge horn antenna for antenna measurement
, 2013 The thesis deals with broadband antennas for measurement purposes. A ridged horn antenna has been selected for this concept, designed for the frequency range 0.9 GHz to 9 GHz.
Vašina, Petr
core