A new method for characterizing the deformable porous materials with noncritical adsorption probes is proposed. The mechanism is based on driving the adsorbate through a sequence of constrained equilibrium states with the insertion isotherms forming a pseudocritical point or a van der Waals-type loop. In the framework of a perturbation theory and Monte Carlo simulations we have found a link between the loop parameters and the host morphology. This allows one to characterize porous matrices through analyzing a shift of the pseudocritical point and a shape of the pseudospinodals.
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http://dx.doi.org/10.1021/jp066460h | DOI Listing |
Bioinformatics
December 2024
Department of Biomedical Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada.
Motivation: Biologically relevant RNA secondary structures are routinely predicted by efficient dynamic programming algorithms that minimize their free energy. Starting from such algorithms, one can devise partition function algorithms, which enable stochastic perspectives on RNA structure ensembles. As the most prominent example, McCaskill's partition function algorithm is derived from pseudoknot-free energy minimization.
View Article and Find Full Text PDFGenetics
December 2024
Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA.
Natural selection on complex traits is difficult to study in part due to the ascertainment inherent to genome-wide association studies (GWAS). The power to detect a trait-associated variant in GWAS is a function of frequency and effect size - but for traits under selection, the effect size of a variant determines the strength of selection against it, constraining its frequency. Recognizing the biases inherent to GWAS ascertainment, we propose studying the joint distribution of allele frequencies across populations, conditional on the frequencies in the GWAS cohort.
View Article and Find Full Text PDFPhys Rev E
November 2024
Integrated Research on Energy, Environment and Society, Faculty of Science and Engineering, University of Groningen, Groningen, Netherlands.
The field of complex networks studies a wide variety of interacting systems by representing them as networks. To understand their properties and mutual relations, the randomization of network connections is a commonly used tool. However, information-theoretic randomization methods with well-established foundations mostly provide a stationary description of these systems, while stochastic randomization methods that account for their dynamic nature lack such general foundations and require extensive repetition of the stochastic process to measure statistical properties.
View Article and Find Full Text PDFPhys Rev E
November 2024
Department of Mechanical and Process Engineering, ETH Zurich, CH-8092 Zurich, Switzerland.
Exact closure for hydrodynamic variables is rigorously derived from the linear Boltzmann kinetic equation. Our approach, based on spectral theory, structural properties of eigenvectors, and the theory of slow manifolds, allows us to define a unique, optimal reduction in phase space close to equilibrium. The hydrodynamically constrained system induces a modification of entropy that ensures pure dissipation on the hydrodynamic manifold, which is interpreted as a nonlocal variant of Korteweg's theory of viscosity-capillarity balance.
View Article and Find Full Text PDFRetina
December 2024
Department of Biomedical Science, Humanitas University, Milan, Italy.
Purpose: To measure the displacement of retinal vascular plexi and choriocapillaris after Pars Plana Vitrectomy (PPV) for idiopathic Macular Hole (MH), using Optical Coherence Tomography Angiography (OCTA) and correlate it with clinical data.
Methods: Retrospective series with 6-month follow-up. Records included best-corrected visual acuity (BCVA), M-charts, structural OCT and OCTA.
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