Results 141 to 150 of about 285,537 (315)
Upper Cervical Cord Area as a Biomarker of Conversion to Secondary Progressive Multiple Sclerosis
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective This study assessed whether upper cervical cord area (UCCA) measured on routine brain MRI can serve as a biomarker of conversion to SPMS. Methods This is a single‐center retrospective cohort study of RRMS patients with cross‐sectional and longitudinal analyses of clinical and MRI data. Future SPMS converters were matched by age, sex,
Nabil K. El Ayoubi +8 more
wiley +1 more source
New periodic orbits in the solar sail restricted three body problem
, 2008 In this paper we consider periodic orbits of a solar sail in the Earth-Sun restricted three-body problem. In particular, we consider orbits which are high above the ecliptic plane, in contrast to the classical Halo orbits about the collinear equilibria ...
Biggs, J.D., Waters, Thomas, McInnes, C.
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Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Early risk stratification may support clinical decision‐making in spontaneous intracerebral hemorrhage (ICH). We aimed to develop and internally validate HAGIV, a score integrating frequency of imaging markers (FIM), a time‐adjusted non‐contrast computed tomography (CT) metric of hematoma expansion, with established predictors for 90‐
Lei Song +10 more
wiley +1 more source
Efficient detection of periodic orbits in high dimensional systems
, 2005 This paper is concerned with developing a method for detecting unstable periodic orbits (UPOs) by stabilising transformations. Here the strategy is to transform the system of interest in such away that the orbits become stable.
Crofts, JJ, Davidchak, RL
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Forecasting seasonal UK consumption components [PDF]
, 1997 Periodic models for seasonal data allow the parameters of the model to vary across the different seasons. This paper uses the components of UK consumption to see whether the periodic autoregressive (PAR) model yields more accurate forecasts than non ...
Smith, Jeremy, Clements, Michael P.
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Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Background Factors associated with relapse course and disability in myelin oligodendrocyte glycoprotein antibody‐associated disease (MOGAD) remain incompletely understood. Objectives To identify clinical and modifiable factors associated with relapse and disability in MOGAD. Methods In this ambispective multicentre cohort study using data from
Yingtao Wang +23 more
wiley +1 more source
The Sarkovskii order for periodic continua
Topology and its Applications, 2007 \textit{A. N. Sharkovskii} [Ukr. Mat. Zh. 16, 61--71 (1964; Zbl 0122.17504)] proved that if \(p \prec q\) according to the following ordering of the positive integers, then for any map of the real line to itself with a periodic point of period \(p\), there exists a periodic point of period \(q\).
openaire +2 more sources
Arthritis Care &Research, EarlyView.Objective Sjögren's disease is an autoimmune disorder that can impact multiple organ systems, including the peripheral nervous system (PNS). PNS manifestations, which can exist concurrently, include mononeuropathies, polyneuropathies, and autonomic nervous system neuropathies.
Anahita Deboo +88 more
wiley +1 more source
Positive periodic solutions for third-order nonlinear differential equations
Electronic Journal of Differential Equations, 2011 For several classes of third-order constant coefficient linear differential equations we obtain existence and uniqueness of periodic solutions utilizing explicit Green's functions.
Jingli Ren, Stefan Siegmund, Yueli Chen
doaj
Square-Root Balancing and Computation of Minimal Realizations of Periodic Systems
, 1998 We propose a numerically reliable approach for balancing and minimal realization of linear periodic systems with time-varying dimensions. The proposed approach to balancing belongs to the family of square-root methods with guaranteed enhanced ...
Varga, A.
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