Results 51 to 60 of about 444,260 (331)
Arthritis Care &Research, Accepted Article.Objective We aimed to identify unique disease trajectories within rheumatoid arthritis‐associated interstitial lung disease (RA‐ILD) based on longitudinal forced vital capacity (FVC) values and their associated clinical outcomes. Methods We performed a cohort study of RA‐ILD within the Veterans Health Administration from 1999‐2021. RA‐ILD patients were
Bryant R. England +9 more
wiley +1 more source
Arthritis Care &Research, Accepted Article.Objective Foot orthoses are thought to improve pain by potentially modifying internal mechanical forces. To test this, we explored whether foot orthoses can modify patterns of bone marrow lesions (BMLs) in people with midfoot pain. Methods Forty‐two people were recruited with midfoot pain and MRI‐confirmed midfoot BMLs.
Jill Halstead +4 more
wiley +1 more source
Finite rank intermediate Hankel operators on the Bergman space [PDF]
Surveys in Mathematics and its Applications, 2011 In this paper we characterize the kernel of an intermediate Hankel operator on the Bergman space in terms of the inner divisors and obtain a characterization for finite rank intermediate Hankel operators.
Namita Das
doaj
On algebras of operators of finite rank
Journal of Functional Analysis, 1978 AbstractAlgebras of operators of finite rank are studied. Some structure theorems are presented. Results are used to study Banach representations of C∗-algebras and isolated points of the dual of C∗-algebras.
openaire +3 more sources
A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems
International Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam +2 more
wiley +1 more source
Remarks on finite rank projections
Journal of Approximation Theory, 1973 AbstractIf every n-dimensional subspace of X∗ is the range of a projection of norm less than C, then every subspace of X with codimension n is the range of a projection having norm less than 1 + C. Also, projection constants of finite-dimensional spaces are determined by finite-dimensional superspaces. It is further demonstrated that spheres cannot, in
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Data‐Driven Distributed Safe Control Design for Multi‐Agent Systems
International Journal of Adaptive Control and Signal Processing, EarlyView.This paper presents a data‐driven control barrier function (CBF) technique for ensuring safe control of multi‐agent systems (MASs) with uncertain linear dynamics. A data‐driven quadratic programming (QP) optimization is first developed for CBF‐based safe control of single‐agent systems using a nonlinear controller. This approach is then extended to the
Marjan Khaledi, Bahare Kiumarsi
wiley +1 more source
A characterization of higher rank symmetric spaces via bounded cohomology
, 2008 Let $M$ be complete nonpositively curved Riemannian manifold of finite volume whose fundamental group $\Gamma$ does not contain a finite index subgroup which is a product of infinite groups.
Bestvina, Mladen, Fujiwara, Koji
core +1 more source
Rank functions of closure spaces of finite rank
Discrete Mathematics, 1984 A closure space \((S,)\) consists of a set S together with a closure operator \(\). In such a space, the set X is closed if \(=X\) while the rank \(\rho\) (A) of a closed set A is the maximum length r of a chain of closed sets \(A_ i\) such that \(A_ 0\varsubsetneq A_ 1\varsubsetneq...\varsubsetneq A_ r=A\) where, if this maximum does not exist, \(\rho\
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Hydrogel‐Based Capacitive Sensor Model for Ammonium Monitoring in Aquaculture
Advanced Engineering Materials, EarlyView.Traditional techniques for monitoring aquaculture water quality, particularly ammonium levels, harm fish. This work presents a novel capacitive sensor with an ionic hydrogel transducer to monitor ammonium concentration in real time based on the ammonium‐induced hydrogel dissociation and osmotic pressure. Monitoring aquaculture water quality, especially
Mohammad Mirzaee +3 more
wiley +1 more source