Results 131 to 140 of about 24,699 (303)

Bifurcation structure of positive stationary solutions for a Lotka–Volterra competition model with diffusion I: Numerical verification of local structure

open access: yes, 2007
This paper is concerned with the bifurcation structure of positive stationary solutions for a generalized Lotka–Volterra competition model with diffusion.
Kan-on, Yukio
core   +1 more source

Plasmakristall‐4 Experiment: 10 Years of Operation in Orbit

open access: yesContributions to Plasma Physics, EarlyView.
ABSTRACT Plasmakristall‐4 (PK‐4) is a microgravity complex plasma laboratory operated for 10 years on board the International Space Station. Its main purpose is the particle‐resolved investigation of generic condensed matter phenomena using strongly coupled suspensions of microparticles immersed in low‐pressure gas‐discharge plasmas.
M. Pustylnik   +3 more
wiley   +1 more source

Discrete-time recurrent neural networks with time-varying delays: Exponential stability analysis

open access: yes, 2007
This is the post print version of the article. The official published version can be obtained from the link below - Copyright 2007 Elsevier LtdThis Letter is concerned with the analysis problem of exponential stability for a class of discrete-time ...
Liu, Y, Liu, X, Wang, Z, Serrano, A
core   +1 more source

Surface hydration‐induced damage in tight oil‐bearing sandy conglomerate reservoirs

open access: yesDeep Underground Science and Engineering, EarlyView.
A series of techniques such as X‐ray diffraction, scanning electron microscopy, energy‐dispersive spectroscopy, conductivity tests, and infrared thermal imaging were used. The key findings are the identification of a two‐stage surface hydration process and the elucidation of the effects of various minerals and elements on the hydration process ...
Anbang Zhao   +5 more
wiley   +1 more source

Age‐related trends in niche position and specialization in Neotropical vertebrates

open access: yesEcography, EarlyView.
Species' niche positions and breadths within a region's environmental space, measured through ecological niche factor analysis (ENFA) as marginality and specialization, can reflect evolutionary constraints related to lineage age. The ‘internal incumbency' hypothesis predicts that older species, due to competitive preemption, occupy more central niche ...
Carlos Calderón del Cid   +3 more
wiley   +1 more source

Boundary Value Problem of Magnetically Insulated Diode: Existence of Solutions and Complex Bifurcation

open access: yesИзвестия Иркутского государственного университета: Серия "Математика"
The paper focuses on the stationary self-consistent problem of magnetic insulation for a vacuum diode with space-charge limitation, described by a singularly perturbed Vlasov-Maxwell system of dimension 1.5. The case of insulated diode when the electrons
D.N. Sidorov   +3 more
doaj   +1 more source

A local bifurcation theorem for C1-Fredholm maps

open access: yes, 1990
A local bifurcation theorem is proved under standard transversality assumptions by means of a reduction to finite dimensions. The Krasnosel'skii Bifurcation Theorem is generalized to C 1 - Fredholm maps. Let X and Y be Banach spaces, F: R x X —> Y be C 1
Pejsachowicz, Jacobo   +2 more
core  

Ultrafast oscillations in the human brain and their functional significance

open access: yesEpilepsia, EarlyView.
Abstract Objective The upper frequency limit of human brain activity remains unknown. Using ultrahigh sampling rate (≥20 kHz) intracranial microelectroencephalography, this study aimed to systematically explore and quantitatively characterize brain field oscillations beyond the established high‐frequency oscillation range (>2 kHz), and to determine ...
Milan Brázdil   +13 more
wiley   +1 more source

A spatiotemporal single‐cell atlas of porcine development reveals regulatory dynamics and cellular targets of domestication

open access: yesiMeta, EarlyView.
This study presents a cross‐tissue, single‐cell/single‐nucleus transcriptomic atlas spanning from prenatal to postnatal developmental stages in pig, characterizing 83 distinct cell types from 252,033 cells. Through the construction of cross‐tissue transcriptional regulatory networks and pseudotime trajectories, we revealed that organogenesis is driven ...
Rong Zhou   +8 more
wiley   +1 more source

COL1A1+ Epithelial Cells Orchestrate VEGFA‐VEGFR Signaling in Endometritis Revealed by Single‐Cell Analysis

open access: yesJournal of Clinical Laboratory Analysis, EarlyView.
Single‐cell RNA‐seq of normal and endometritis endometrium shows reduced epithelial cells and fate divergence toward ferroptosis or ribosome/antigen‐presentation programs. COL1A1+ epithelial cells act as an AP‐1–driven hub that enhances VEGFA–VEGFR signaling and remodels the vascular microenvironment.
Chengzi Tian, Zaiyi Li
wiley   +1 more source

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