Results 71 to 80 of about 47,314 (311)

Cervical Spinal Cord Magnetization Transfer Ratio and Its Relationship With Clinical Outcomes in Multiple Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective The cervical spinal cord (cSC) is highly relevant to clinical dysfunction in multiple sclerosis (MS) but remains understudied using quantitative magnetic resonance imaging (MRI). We assessed magnetization transfer ratio (MTR), a semi‐quantitative MRI measure sensitive to MS‐related tissue microstructural changes, in the cSC and its ...
Lisa Eunyoung Lee, Julien Cohen‐Adad, Irene M. Vavasour, Melanie Guenette, Katherine Sawicka, Neda Rashidi‐Ranjbar, Nathan Churchill, Akash Chopra, Adelia Adelia, Pierre‐Louis Benveniste, Anthony Traboulsee, Nathalie Arbour, Fabrizio Giuliani, Larry D. Lynd, Scott B. Patten, Alexandre Prat, Alice Schabas, Penelope Smyth, Roger Tam, Yunyan Zhang, Simon J. Graham, Mojgan Hodaie, Anthony Feinstein, Shannon Kolind, Tom A. Schweizer, Jiwon Oh, CanProCo Study Group   +26 more
wiley   +1 more source

A practical approach to computing Lyapunov exponents of renewal and delay equations

Mathematical Biosciences and Engineering
We propose a method for computing the Lyapunov exponents of renewal equations (delay equations of Volterra type) and of coupled systems of renewal and delay differential equations.
Dimitri Breda, Davide Liessi
doaj   +1 more source

Remaining Burden of Spinal Muscular Atrophy Among Treated Patients: A Survey of Patients and Caregivers

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Spinal muscular atrophy (SMA) significantly impacts motor function. This study aimed to assess the persistent burden and unmet needs among currently treated patients with SMA and their caregivers. Methods Two complementary web‐based surveys were distributed in August 2024 among patients with SMA and their caregivers.
Julie A. Parsons, Natalie Land, Melissa Culhane Maravic, Claire Cagle, Amal Jamaleddine, Hemal Shah, Thomas Brown, Christabella Cherubino, Mouhamed Gueye   +8 more
wiley   +1 more source

Non-Spiking Laser Controlled by a Delayed Feedback

Mathematics, 2020
In 1965, Statz et al. (J. Appl. Phys. 30, 1510 (1965)) investigated theoretically and experimentally the conditions under which spiking in the laser output can be completely suppressed by using a delayed optical feedback. In order to explore its effects,
Anton V. Kovalev, Evgeny A. Viktorov, Thomas Erneux   +2 more
doaj   +1 more source

Understanding Contributors of Resilience in Youth With Childhood‐Onset Systemic Lupus Erythematosus Through a Socioecological Lens: A Mixed‐Methods Study

Arthritis Care &Research, EarlyView.
Objective This study aimed to identify themes contributing to resilience in childhood‐onset systemic lupus erythematosus (cSLE), distinguish between profiles of resilience, and examine how they relate to underlying themes and patient characteristics. Methods We conducted a mixed‐methods study of 21 patients with cSLE aged 11 to 19 years at a Canadian ...
Isabella Zaffino, Louise Boulard, Joanna Law, Asha Jeyanathan, Lawrence Ng, Sandra Williams‐Reid, Kiah Reid, Angela Cortes, Eugene Cortes, Ashley Danguecan, Deborah M. Levy, Linda T. Hiraki, Andrea M. Knight   +12 more
wiley   +1 more source

Periodic solutions for functional differential equations with periodic delay close to zero

Electronic Journal of Differential Equations, 2006
This paper studies the existence of periodic solutions to the delay differential equation $$ dot{x}(t)=f(x(t-muau(t)),epsilon),. $$ The analysis is based on a perturbation method previously used for retarded differential equations with constant delay. By
My Lhassan Hbid, Redouane Qesmi
doaj  

Uniform Stability In Nonlinear Infinite Delay Volterra Integro-differential Equations Using Lyapunov Functionals

Nonautonomous Dynamical Systems, 2016
In [10] the first author used Lyapunov functionals and studied the exponential stability of the zero solution of finite delay Volterra Integro-differential equation. In this paper, we use modified version of the Lyapunov functional that were used in [10]
Raffoul Youssef, Rai Habib
doaj   +1 more source

Real‐World Cost‐Effectiveness of a Standardized Education and Exercise Therapy Program for Hip and Knee Osteoarthritis Compared to Usual Care

Arthritis Care &Research, EarlyView.
Objective We estimated the real‐world cost‐effectiveness of a standardized education and exercise therapy program (GLA:D) compared to usual care (UC) for people managing hip and/or knee osteoarthritis (HKOA). Methods We used a prospective matched cohort design to recruit people (aged >45 years) diagnosed with HKOA who used GLA:D or UC (not on a ...
Darren R. Mazzei, Jackie L. Whittaker, Peter Faris, Tracy Wasylak, Deborah A. Marshall   +4 more
wiley   +1 more source

Global asymptotic stability of a delay differential equation model for SARS-CoV-2 virus infection mediated by ACE2 receptor protein. [PDF]

Appl Math Lett, 2023
Lv J, Ma W.
europepmc   +1 more source

Data‐driven forecasting of ship motions in waves using machine learning and dynamic mode decomposition

International Journal of Adaptive Control and Signal Processing, EarlyView.
Summary Data‐driven forecasting of ship motions in waves is investigated through feedforward and recurrent neural networks as well as dynamic mode decomposition. The goal is to predict future ship motion variables based on past data collected on the field, using equation‐free approaches.
Matteo Diez, Mauro Gaggero, Andrea Serani   +2 more
wiley   +1 more source