Results 31 to 40 of about 2,355,604 (311)

Correlation between genetic polymorphisms and stroke recovery: analysis of the GAIN Americas and GAIN International Studies

, 2012
BACKGROUND AND PURPOSE: Recovery after stroke occurs on the basis of specific molecular events. Genetic polymorphisms associated with impaired neural repair or plasticity might reduce recovery from stroke and might also account for some of the ...
PROCACCIO V, CAROLEI, ANTONIO, GAIN International Study Investigators, as member of GAIN Americas, CRAMER SC   +4 more
core   +1 more source

Design of a Low-Profile, Frequency- Reconfigurable, and High Gain Antenna Using a Varactor-Loaded AMC Ground

IEEE Access, 2020
In this paper, a novel planar active artificial magnetic conductor (AAMC) frequency-reconfigurable antenna printed on an FR4 substrate is proposed. Its AAMC metal pattern in a unit cell consists of a compound-five-ring nesting (CFRN) structure.
Shuhui Yang, Yinchao Chen, Chenyin Yu, Yajie Gong, Fanglu Tong   +4 more
doaj   +1 more source

Modeling, Characterization, and Machine Learning Algorithm for Rectangular Choke Horn Antennas

IEEE Access
In this work, we present the design and modeling of a new type of choke horn antenna. It incorporates a rectangular waveguide and a rectangular choke acting as a parasitic element.
Ibrahim N. Alquaydheb, Saleh A. Alfawaz, Amirreza Ghadimi Avval, Sara Ghayouraneh, Samir M. El-Ghazaly   +4 more
doaj   +1 more source

Dual-Polarized Antenna Gain Enhancement Using Dielectric Slab Superstrate and its Application in Forming an Array

IEEE Access, 2021
The use of dielectric slab superstrate (DSS) is proposed for gain enhancement of dual-polarized patch antenna and the corresponding arrays. The DSS for a single antenna is investigated firstly to lay a solid foundation for the design of DSS for large ...
Haoyang Zhang, Yin-Hua Yu, Wen Wu, Da-Gang Fang   +3 more
doaj   +1 more source

FEL gain enhancement in an optical klystron

Radiation Physics and Chemistry
A system comprising two identical helical or planar undulators separated by a gap -- viz., an optical klystron (OK) -- is investigated. A formula for the frequency distribution of spontaneous radiation at zero angle is derived. It is shown that the spontaneous radiation line shape gradually narrows with increasing distance (up to an optimal value ...
Anahit H. Shamamian, Hayk L. Gevorgyan, Lekdar A. Gevorgian   +2 more
openaire   +2 more sources

A New Technique of FSS-Based Novel Chair-Shaped Compact MIMO Antenna to Enhance the Gain for Sub-6GHz 5G Applications

IEEE Access
This paper introduces a new compact Chair-shaped MIMO antenna with two radiating elements and a single layer of frequency-selective surface (FSS) for 5G Sub-6GHz communication systems.
M. Y. Zeain, Maisarah Abu, Ayman A. Althuwayb, Hussein Alsariera, Ahmed Jamal Abdullah Al-Gburi, Ali Abdulateef Abdulbari, Zahriladha Zakaria   +6 more
doaj   +1 more source

Review of Metasurfaces Through Unit Cell Design and Numerical Extraction of Parameters and Their Applications in Antennas

IEEE Access, 2022
A thorough review of metasurfaces (2D planar counterpart of metamaterials) based on electromagnetic (EM) classification i.e., $\varepsilon $ -negative (ENG), $\mu $ -negative (MNG), and double-negative (DNG) materials is presented in this paper.
Komal Iqbal, Qasim Umar Khan
doaj   +1 more source

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen, Calogero Virgone, Antje Redlich, Michael Abele, Ricardo Lopez‐Almaraz, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Maja Mazic Cesen, Andrea Ferrari, Malgorzata A. Krawczyk, Yves Reguerre, Dominik T. Schneider, Ines B. Brecht, Charlotte Rigaud, Bilgehan Yalcin, Rainer Claus, Christian Vokuhl, Constantin Lapa, Jörg Fuchs, Segolene Hescot, Thomas Walter, Julien Hadoux, Daniel Orbach   +23 more
wiley   +1 more source

Fresnel Lens Antennas With Smooth Phase Compensation and Manufactured With a Very Low-Cost Technological Process in the 220–330 GHz Band

IEEE Access
In this paper, the performance of Fresnel Lens Antennas (FLAs) is investigated in the 220–330 GHz frequency band for future high-data-rate wireless communication systems.
Alexis Goblot, Olivier Lafond, Mohammed Himdi   +2 more
doaj   +1 more source

A V2V communication system with enhanced multiplicity gain [PDF]

2013 IEEE Globecom Workshops (GC Wkshps), 2013
Vehicle to vehicle (V2V) communication has gained renewed interest among research community which is further signified by the allocation of dedicated spectrum and an IEEE standard for their usage in recent years. However, 802.11p, the current IEEE standard for vehicular communications, has a relatively low multiplicity (the number of links that it can ...
Qi Zhan, V. K. Varma Gottumukkala, Akihisa Yokoyama, Hlaing Minn   +3 more
openaire   +1 more source