Results 91 to 100 of about 331,856 (335)

Long subcutaneous tunnelling reduces infection rates in paediatric external ventricular drains [PDF]

, 2014
Purpose The aim of this study is to report the efficacy of long subcutaneous tunnelling of external ventricular drains in reducing rates of infection and catheter displacement in a paediatric population. Methods In children requiring external ventricular
Chakraborty, A, Collins, CDE, Hartley, JC, Thompson, DNP   +3 more
core   +1 more source

Millisecond‐Switching Dual‐Band/Dual‐Polarization Ka‐Band Wavefront Control Enabled by a Complementary Liquid‐Crystal Metasurface

Advanced Materials Technologies, EarlyView.
An LCD‐compatible complementary liquid‐crystal metasurface delivers dual‐band, dual‐polarized Ka‐band wavefront control with millisecond switching via a 10‐µm LC gap. Interlaced patch/slot pairs enable independent phase tuning at 28 and 38 GHz, while strategic 45° slot rotation suppresses parasitic resonances. Measurements on a 160 × 160‐cell prototype
Daehyeon Kim, Donggeun An, Hyunjae Shin, Youngno Youn, Wonbin Hong   +4 more
wiley   +1 more source

Broadband Transfer Characteristics of DC Electronic Current Transformers

IEEE Access
The frequent operation of the switching devices inside the converter valve (mainly composed of thyristors) and other equipment in the converter station of ultra-high voltage direct current (UHVDC) transmission system generates a large number of high ...
Songyu Yang, Jian Le, Jing Wang, Weihao Wang   +3 more
doaj   +1 more source

A systematic review of post-operative infections in pediatric ventriculoperitoneal shunt cases [PDF]

Romanian Journal of Pediatrics
Background. Hydrocephalus is a prevalent condition in children, affecting both developed and developing countries. Neurosurgical interventions such as ventriculoperitoneal shunts are common, but are associated with a high risk of complications, including
Farhad Bal’afif, Tommy Alfandy Nazwar, Donny Wisnu Wardhana, Prisca Anindhita, Abdo Rouf El Shadawi, Hatim Sultan, Mochamad Bashir, Mustofa Mustofa   +7 more
doaj   +1 more source

Application of piezoelectric macro-fiber-composite actuators to the suppression of noise transmission through curved glass plates

, 2012
This paper analyzes the possibility of increasing the acoustic transmission loss of sound transmitted through planar or curved glass shells using attached piezoelectric macro fiber composite (MFC) actuators shunted by active circuits with a negative ...
Mokry, Pavel, Novakova, Katerina, Vaclavik, Jan   +2 more
core   +1 more source

Engineering of Double Absorber Organic‐Perovskite Solar Cells for >34% Efficiency with V2O5 as Back Surface Field Layer

Advanced Photonics Research, EarlyView.
This study investigates high‐efficiency double perovskite active layer (DPAL) structures using MAPbI3 and MASnI3 to surpass the Shockley‐Queisser limit in single‐junction perovskite solar cells. SCAPS‐1D simulations show that the V2O5‐assisted DPAL device achieves 34.14% power conversion efficiency with improved JSC, VOC, and FF.
Afifa Lubaba, Mohammed M. Fadhali, Md. Faruk Hossain, Md. Harun‐Or‐ Rashid, Nacer Badi, Aijaz Rasool Chaudhry, Ahmad Irfan, Md. Ferdous Rahman   +7 more
wiley   +1 more source

Low-decoherence flux qubit

, 2007
A flux qubit can have a relatively long decoherence time at the degeneracy point, but away from this point the decoherence time is greatly reduced by dephasing. This limits the practical applications of flux qubits.
C. Cohen-Tannoudji, Franco Nori, J. Q. You, S. Ashhab, Xuedong Hu   +4 more
core   +1 more source

Terahertz Waveform‐Selective Antenna Using a Patch Structure Loaded with Nonlinear Circuits

Advanced Photonics Research, EarlyView.
A waveform‐selective antenna that integrates the functions of waveform selectivity, electromagnetic shielding, and EM wave radiation has been proposed. By integrating different nonlinear circuits and selecting appropriate component values, the antenna can achieve high reflection of either a pulse wave or a continuous wave, while allowing the other ...
Zeting Li, Kai‐Da Xu, Pin Wen
wiley   +1 more source

Organic Bulk‐Heterojunction‐Integrated Flexible Perovskite Photodetection Arrays for High‐Speed Broadband Optical Communication

Advanced Science, EarlyView.
A flexible broadband photodetector is realized by integrating a perovskite with an organic bulk‐heterojunction. It achieves high external quantum efficiency (EQE) (>80% visible, >60% near‐infrared (NIR)), ultralow dark current, and fast response, enabling self‐powered, high‐detectivity operation.
Xin Hong, Kanghui Ke, Yu Gao, Jiazhi Meng, Bohua Deng, Haoyu Huang, Zhichun Si, H. Y. Fu, Feiyu Kang, Guodan Wei   +9 more
wiley   +1 more source

Platypnea-orthodeoxia: Patent foramen ovale unmasked by pulmonary emboli

Indian Journal of Respiratory Care, 2018
This report describes an 84 year old woman who presented with breathlessness from platypnea-orthodeoxia. This was due to a distortion of a patent foramen ovale by lower thoracic vertebral fractures which allowed a right-to-left intracardiac shunt.
Grainne Gallagher, Alex Joseph, Rajkumar Rajendram   +2 more
doaj   +1 more source