Results 91 to 100 of about 40,507 (308)

Hermiticity-tunable beam reshaping: localization, recurrence and group velocity oscillation

New Journal of Physics, 2019
We propose a novel method to reshape the light beam in a Hermiticity-tunable photonic lattice with PT symmetric perturbations. By adjusting the PT perturbations, the Hermiticity of the system varies alternatively, further resulting in the periodic ...
Kaiwen Ji, Zhenjuan Liu, Yanan Dai, Yuanmei Gao, YiShan Wang, Jintao Bai, Guoquan Zhang, Xinyuan Qi   +7 more
doaj   +1 more source

Measurement of the Dispersion of an Antiresonant Hollow Core Fiber

IEEE Photonics Journal, 2018
Due to unique properties, antiresonant hollow core fibers have found widespread use in various fields of science and application. Particular regarding applications that involve ultrashort pulses, precise knowledge of group velocity dispersion is ...
Teodora Grigorova, Rudrakant Sollapur, Andreas Hoffmann, Alexander Hartung, Anka Schwuchow, Jorg Bierlich, Jens Kobelke, Markus A. Schmidt, Christian Spielmann   +8 more
doaj   +1 more source

Normal‐Appearing White Matter Injury Mediates Chronic Deep Venous Hypoxia and Disease Progression in Multiple Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To explore how cerebral hypoxia and Normal‐Appearing White Matter (NAWM) integrity affect MS lesion burden and clinical course. Methods Seventy‐nine MS patients, including 13 clinically isolated syndrome (CIS) patients and 66 relapsing–remitting multiple sclerosis (RRMS) patients, and 44 healthy controls (HCs) were recruited from ...
Xinli Wang, Huiying Wang, Zhizheng Zhuo, Ai Guo, Ke Lv, Decai Tian, Chao Chai, Yunyun Duan, Shuang Xia   +8 more
wiley   +1 more source

CSF Monoamine Metabolites and Cognitive Trajectory in Early Parkinson's Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background Imaging and postmortem studies indicate that abnormalities in monoaminergic neurotransmission contribute to cognitive impairment in Parkinson's disease (PD). However, it remains uncertain if cerebrospinal fluid (CSF) monoamine metabolites can serve as biomarkers of cognitive decline in early PD.
Jing‐Yu Shao, Rong Li, Yu‐Xiang Jiao, Kai Ma, Hong‐Qi Yang, Zheng‐Yu Sun, Jie‐Wen Zhang, Shuai Chen   +7 more
wiley   +1 more source

NEAR SURFACE VELOCITY STRUCTURE OF ANDALUCIA (SOUTHERN SPAIN) AND ALBORAN SEA REGION FROM 0.15-2.0 HZ RAYLEIGH WAVES

Tecnociencia, 2004
  A methodology that has been applied for a relatively short time on Seismology is the modelling of very shallow structures from the inversion of dispersion values (group velocity of short period Rg waves).
M. Chourak, M. Navarro, J. Badal
doaj  

Tunable single-cycle pulse compression at the group-velocity horizon

, 2014
An adjustable adiabatic soliton compression scheme is presented, enabling pulse generation in the single-cycle regime. The compression comes without external dispersion compensation and is naturally stimulated by two-pulse collisions in an optical event ...
Amiranashvili, Shalva, Shalva Amiranashvili, Demircan, Ayhan, Gunter Steinmeyer, Morgner, Uwe, Ayhan Demircan, Uwe Morgner, Brée, Carsten, Carsten Bree, Steinmeyer, Günter   +9 more
core   +1 more source

IV Thrombolysis Facilitates Interventional Reperfusion in Non‐Cardioembolic but Not Cardioembolic Stroke

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Intravenous thrombolysis (IVT) before thrombectomy for ischemic stroke may alter clot structure and procedural performance. We investigated how IVT relates to thrombectomy metrics across stroke etiologies. Methods We performed a time‐to‐event analysis of consecutive patients with anterior circulation large vessel occlusion (acLVO ...
Annahita Sedghi, Daniel P. O. Kaiser, Martin Arndt, Norma J. Diel, Erik Simon, Witold H. Polanski, Volker Puetz, Hagen B. Huttner, Timo Siepmann   +8 more
wiley   +1 more source

Amplification of Frequency-Modulated Similariton Pulses in Length-Inhomogeneous Active Fibers

International Journal of Optics, 2012
The possibility of an effective gain of the self-similar frequency-modulated (FM) wave packets is studied in the length-inhomogeneous active fibers. The dynamics of parabolic pulses with the constant chirp has been considered. The optimal profile for the
I. O. Zolotovskii, D. I. Sementsov, A. A. Sysolyatin, A. S. Belanov, M. S. Yavtushenko   +4 more
doaj   +1 more source

The Role of Calcitonin Gene‐Related Peptide in High‐Altitude Headache: A Prospective Field Study

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective High‐altitude headache (HAH) is a common neurological condition associated with rapid ascent to high altitude. The pathophysiological mechanisms underlying HAH remain incompletely understood. Calcitonin gene‐related peptide (CGRP), a neuropeptide implicated in migraine pathophysiology, may play a key role in the pathophysiology of ...
Roman Schniepp, Ludwig Karrasch, Helena Breitenstein, Andreas Straube, Katharina Kamm   +4 more
wiley   +1 more source

Effectiveness of rTMS on Working Memory and Inhibitory Impairments in Patients With Post‐Stroke Executive Deficits

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Considerable efforts have been dedicated to developing effective treatments for post‐stroke executive impairment (PSEI), among which repetitive transcranial magnetic stimulation (rTMS) has shown great potential. This study aimed to investigate the therapeutic effects of high‐frequency rTMS on working memory (WM) and response ...
Mengting Lao, Rongwei Du, Zhujun Wang, Yang Gao, Meiling Cheng, Xianglong Wang, Wen Wu   +6 more
wiley   +1 more source