Results 71 to 80 of about 783,150 (225)

Pulmonary Arterial Wedge Oxygen Saturation: Does It Confirm Wedge Position in Patients With Pulmonary Hypertension?

open access: yesPulmonary Circulation, Volume 15, Issue 4, October 2025.
ABSTRACT Pulmonary artery wedge pressure is a crucial measurement for differentiating between hemodynamic categories of pulmonary hypertension (PH), particularly Groups 1 and 2. In this prospective study, we analyzed the diagnostic utility of checking wedge oxygen saturation to confirm wedge position during right heart catheterization in patients ...
Ambalavanan Arunachalam   +7 more
wiley   +1 more source

Sensitivity Analyses for Missing in Repeatedly Measured Outcome Data

open access: yesStatistics in Medicine, Volume 44, Issue 23-24, October 2025.
ABSTRACT We discuss practical aspects of conducting sensitivity analyses for missing data with a repeatedly measured outcome. Our motivation is a SMART trial with a repeatedly measured outcome subject to missingness. We discuss and describe delta‐based controlled imputation approaches to conducting sensitivity analyses for such trials that typically ...
James F. Troendle   +3 more
wiley   +1 more source

The Pullback Attractors for the Nonautonomous Camassa‐Holm Equations [PDF]

open access: yesMathematical Problems in Engineering, 2009
We consider the pullback attractors for the three‐dimensional nonautonomous Camassa‐Holm equations in the periodic box Ω = [0, L] 3. Assuming , which is translation bounded, the existence of the pullback attractor for the three‐dimensional nonautonomous Camassa‐Holm system is proved in D(A1/2) and D(A).
openaire   +2 more sources

Periodic Random Attractors for Stochastic Navier-Stokes Equations on Unbounded Domains

open access: yes, 2012
This paper is concerned with the asymptotic behavior of solutions of the two-dimensional Navier-Stokes equations with both non-autonomous deterministic and stochastic terms defined on unbounded domains.
Wang, Bixiang
core   +1 more source

Invariant manifolds as pullback attractors of nonautonomous differential equations

open access: yesDiscrete & Continuous Dynamical Systems - A, 2005
We discuss the relationship between invariant manifolds of nonautonomous differential equations and pullback attractors. This relationship is essential, e.g., for the numerical approximation of these manifolds. In the first step, we show that the unstable manifold is the pullback attractor of the differential equation.
Aulbach, Bernd   +2 more
openaire   +2 more sources

Climate dynamics and fluid mechanics: Natural variability and related uncertainties

open access: yes, 2010
The purpose of this review-and-research paper is twofold: (i) to review the role played in climate dynamics by fluid-dynamical models; and (ii) to contribute to the understanding and reduction of the uncertainties in future climate-change projections. To
Allen   +113 more
core   +1 more source

Pullback attractors for generalized Korteweg–de Vries–Burgers equations

open access: yesJournal of Mathematical Analysis and Applications, 2012
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Anh, Cung The, Bao, Tang Quoc
openaire   +2 more sources

Pullback Attractors of Nonautonomous and Stochastic Multivalued Dynamical Systems

open access: yesSet-Valued Analysis, 2003
In this paper we study the existence of pullback global attractors for multivalued processes generated by differential inclusions. First, we define multivalued dynamical processes, prove abstract results on the existence of !-limit sets and global attractors and study their topological properties (compactness, conectedness).
Caraballo Garrido, Tomás   +3 more
openaire   +3 more sources

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