Results 101 to 110 of about 16,568 (299)

Nodal Na+ and Ca2+ flux dynamics in cortical myelinated axons

Frontiers in Cellular Neuroscience
Functional neuronal connectivity relies on long-range propagation of action potentials by myelinated axons. This process critically depends on the distribution and biophysical properties of ion channels clustered at specialized, regularly spaced domains,
Oron Kotler, Kenichi Miyazaki, Yana Khrapunsky, William N. Ross, Ilya A. Fleidervish   +4 more
doaj   +1 more source

Development and Verification of Hexagonal Quasi-diffusion Code Based on Variational Nodal Method

Yuanzineng kexue jishu, 2023
New type reactors usually adopt advanced fuel types and more anisotropic fuel arrangements, the neutron spectrum is very different from that of pressurized water reactor, and the neutron anisotropy is stronger.
ZHUANG Kun;WANG Lianjie;LIU Kun;YAN Jiangtao;SHANG Wen
doaj  

Implementation of the analytic nodal method in the ndf code and applications to candu reactors [PDF]

, 2000
Review of the analytic nodal method for 3-D static neutron diffusion equation -- Description of the coarse mesh finite difference method in the code NDF and static applications -- Numerical considerations of the analytic nodal method -- Static ...
Mao, Jinchao
core  

A self-consistent nodal method in response matrix formalism for the multigroup diffusion

, 1996
We develop a nodal method for the multigroup diffusion equations, based on the transverse integration procedure (TIP). The efficiency of the method rests upon the convergence properties of a high-order multidimensional nodal expansion and upon numerical ...
Mund, EH., Malambu, EM, Mund, Ernest, Malambu, Edouard   +3 more
core   +1 more source

Multi-scale analysis of apparent diffusion coefficient (ADC) predicts cervical nodal status in patients with head and neck squamous cell carcinoma [PDF]

, 2013
The study assess multi-scale diffusion parameters (median volumetric nodal region of interest values, inter-voxel histogram distributions, and intra-voxel diffusion heterogeneity as assessed by the stretched exponential model) as classifiers of nodal ...
Beale, T, Mendes, R, Dikaios, N, Halligan, S, Taylor, S., PURPURA, Pierpaolo, Rice, S, Forster, M, Shonit, P, Newton, N, Carnell, D, Vaitilingam, T, Atkinson, D, Price, D, Fitzke, H, Bainbridge, A, Morley, S   +16 more
core  

Macroscale Gradient‐Informed Neural Oscillation Topography in Parkinson's Disease

Movement Disorders, EarlyView.
Abstract Background Parkinson's disease (PD) is characterized by large‐scale disruptions in beta and gamma oscillations. Although subcortical beta power is an established biomarker for current adaptive deep brain stimulation (aDBS), it may not fully capture the global pathophysiological burden and the macroscale hierarchical reorganization of the ...
Hao Ding, Ke Xie, Manuel Bange, Hannah Kühne, Jenny Blech, Bahman Nasseroleslami, Jens Volkmann, Sergiu Groppa, Muthuraman Muthuraman   +8 more
wiley   +1 more source

Abnormalities of white matter network properties in middle-aged and elderly patients with functional constipation

Frontiers in Neurology
PurposeTo explore white matter network topological properties changes in middle-aged and elderly patients with functional constipation (Functional Constipation, FC) by diffusion tensor imaging (DTI), and to evaluate the correlation between the abnormal ...
Hou Xueyan, Hou Xueyan, Ai Qi, Ai Qi, Song Chunming, Zhi Yu, Weng Wencai   +6 more
doaj   +1 more source

Predictive Values of MRI and PET Derived Quantitative Parameters for Patterns of Failure in Both p16+ and p16– High Risk Head and Neck Cancer

Frontiers in Oncology, 2019
Purpose: FDG-PET adds to clinical factors, such tumor stage and p16 status, in predicting local (LF), regional (RF), and distant failure (DF) in poor prognosis locally advanced head and neck cancer (HNC) treated with chemoradiation.
Yue Cao, Yue Cao, Yue Cao, Madhava Aryal, Pin Li, Choonik Lee, Matthew Schipper, Matthew Schipper, Peter G. Hawkins, Christina Chapman, Christina Chapman, Dawn Owen, Aleksandar F. Dragovic, Paul Swiecicki, Keith Casper, Francis Worden, Theodore S. Lawrence, Avraham Eisbruch, Michelle Mierzwa   +18 more
doaj   +1 more source

Central Nervous System Tumors in Xeroderma Pigmentosum: Five Cases and Review of the Literature

Movement Disorders, EarlyView.
Abstract Background Xeroderma pigmentosum (XP) is a rare autosomal recessive DNA‐repair disorder characterized by extreme ultraviolet radiation (UVR) sensitivity, markedly increased cutaneous malignancy risk, and progressive neurological disease in approximately one‐third of patients.
Farrah S. Bakr, Huseyin Arisoy, Alan R. Lehmann, Paola Giunti, Hiva Fassihi   +4 more
wiley   +1 more source

Dissecting the dynamics of signaling events in the BMP, WNT, and NODAL cascade during self-organized fate patterning in human gastruloids.

PLoS Biology, 2019
During gastrulation, the pluripotent epiblast self-organizes into the 3 germ layers-endoderm, mesoderm and ectoderm, which eventually form the entire embryo.
Sapna Chhabra, Lizhong Liu, Ryan Goh, Xiangyu Kong, Aryeh Warmflash   +4 more
doaj   +1 more source