Results 41 to 50 of about 164,585 (269)

Gravity‐Dependent Modulation of Downbeat Nystagmus: Insights From Velocity‐Storage Dysfunction

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Downbeat nystagmus varies with head position, a phenomenon termed gravity‐dependent modulation. We aimed to clarify its mechanism using a velocity‐storage model. Methods In 10 patients with downbeat nystagmus due to cerebellar disorders, we recorded eye movements at different pitch‐ and roll‐axis head positions.
Ji‐Hyung Park, Eun‐Hyuk Choi, Jorge Otero‐Millan, David S. Zee, Jeong‐Yoon Choi, Ji‐Soo Kim   +5 more
wiley   +1 more source

Evaluation of Dried Plasma Spot‐Based Quantification of Glial Fibrillary Acidic Protein as a Disease‐Associated Biomarker in Neuromyelitis Optica Spectrum Disorder

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To evaluate the diagnostic accuracy of glial fibrillary acidic protein (GFAP) measured in dried plasma spots versus conventional plasma‐ and serum‐GFAP testing for assessment of disease severity in aquaporin‐4 immunoglobulin G–positive neuromyelitis optica spectrum disorder (AQP4‐IgG+ NMOSD).
Felix Wohlrab, Evelyn Alvarez, Roua Hamdi, Bingqing Zhang, Hayeun Ji, Niyati Jhaveri, Patrick Schindler, Pedro Sanchez, Pia S. Sperber, Tanja Schmitz‐Hübsch, Frederike C. Oertel, Nisa Vorasoot, Najib Kissani, Falko Böhringer, Jens Kuhle, Anne‐Katrin Pröbstel, Xiao‐Jun Ma, Péter Körtvelyessy, Patrick Waters, Friedemann Paul   +19 more
wiley   +1 more source

Methodical inaccuracy of the Z-scan method for few-cycle terahertz pulses

Scientific Reports, 2019
Modern sources of THz radiation generate high-intensity pulses allowing to observe nonlinear effects in this spectral range. To describe many nonlinear effects theoretically, it is necessary to know the nonlinear refractive index coefficient of optical ...
Maksim Melnik, Irina Vorontsova, Sergey Putilin, Anton Tcypkin, Sergei Kozlov   +4 more
doaj   +1 more source

The coefficient of dynamism of a nonlinear oscillator

Bulletin of the National Technical University «KhPI» Series: Dynamics and Strength of Machines, 2017
Nonlinear oscillations caused by the initial deviation of the oscillator from the equilibrium position or the initial velocity given to it in this position are considered. It is assumed that the restoring force is proportional to the sine of the displacement of the oscillatory system. There are two variants of the sine: trigonometric and hyperbolic. In
Olshanskiy, V. P., Olshanskiy, S. V.
openaire   +3 more sources

Use of a Molecular Signature Response Classifier to Inform Treatment Selection Improves Clinical Disease Activity Among Patients with Rheumatoid Arthritis Initiating a Biologic or Targeted Synthetic Disease‐Modifying Antirheumatic Drug

Arthritis Care &Research, EarlyView.
Objective We assessed the effectiveness of PrismRA to improve clinical outcomes among patients with rheumatoid arthritis (RA) initiating treatment with a biologic or targeted synthetic disease‐modifying antirheumatic drug (b/tsDMARD). Methods PrismRA incorporated 19 gene expression features and four clinical features to assess a patient's likelihood of
Fenglong Xie, Timothy Beukelman, Nicholas P. McCormick, Jeffrey R. Curtis   +3 more
wiley   +1 more source

Determination of nonlinear permeability parameters for shear zones in Baihetan Hydropower Station by in-situ tests

Yantu gongcheng xuebao, 2020
Based on the Forchheimer equation of generalized nonlinear permeability, an in-situ test method for determining the permeability parameters of nonlinear flow in shear zones is proposed. Based on the field tests of Baihetan Hydropower Station, it is found
ZHOU Zhi-fang 1, LI Si-jia 1, WANG Zhe 1, GUO Qiao-na 1, SHI An-chi 2, CHEN Meng 1, SHEN Qi 1
doaj   +1 more source

New optical solitons of fractional nonlinear Schrodinger equation with the oscillating nonlinear coefficient: A comparative study

Results in Physics, 2022
In this current exploration, some new optical soliton structures of fractional nonlinear Schrodinger equation with the oscillating nonlinear coefficient are constructed with three different definitions of fractional operators beta, Riemann–Liouville, and
Muhammad Bilal Riaz, Abdon Atangana, Adil Jahngeer, Fahd Jarad, Jan Awrejcewicz   +4 more
doaj   +1 more source

Influence of the accommodation coefficient on nonlinear bubble oscillations [PDF]

The Journal of the Acoustical Society of America, 2010
This paper numerically investigates the effect of mass transfer processes on spherical single bubble dynamics using the Hertz–Langmuir–Knudsen approximation for the mass flux across the interface. Bubble behavior, with and without mass transfer, is studied for different values of pressure wave amplitude and frequency, as well as initial bubble radius ...
Fuster, Daniel, Hauke, Guillermo, Dopazo, Cesar   +2 more
openaire   +3 more sources

Adaptive Observer for Coupled Wave PDE and Infinite ODE With Sampled Data and Unknown Input: Application to Brain Hemodynamics Estimation

International Journal of Adaptive Control and Signal Processing, EarlyView.
This article proposes a convergent adaptive observer for a damped wave PDE and an infinite‐dimensional ODE coupled in cascade using sampled‐in‐space ODE state measurements. The proposed observer estimates the distributed states of the PDE and ODE along with unknown PDE parameters and spatial input.
Zehor Belkhatir, Sarah Mechhoud, Taous‐Meriem Laleg‐Kirati   +2 more
wiley   +1 more source

Observer‐Based Adaptive Event‐Triggered Tracking Control for Fuzzy TS Systems With Premise Mismatch

International Journal of Adaptive Control and Signal Processing, EarlyView.
This paper presents an adaptive logistic event‐triggered observer‐based tracking controller for Takagi‐Sugeno fuzzy systems under constrained inputs and network delays. Leveraging a hybrid LMI and Secretary Bird Optimization approach, this strategy significantly minimizes communication overhead and computational burden while ensuring optimal reference ...
Oussama Djadane, Salama Makni, Mourad Kchaou, Ahmed El Hajjaji   +3 more
wiley   +1 more source