Results 81 to 90 of about 19,254 (188)

Sleep Deprivation in Mice: Looking Beyond the Slow Wave Rebound

open access: yesJournal of Sleep Research, EarlyView.
ABSTRACT Sleep is a fundamental process supporting the dynamic regulation of neural function. Emerging methods have proposed that the aperiodic components of brain signals (such as the spectral slope, spectral intercept, and spectral knee), in addition to entropy‐based measures, offer robust empirical markers of neural states.
Tárek Zoltán Magyar   +2 more
wiley   +1 more source

Hidráulica do escoamento e transporte de sedimentos em sulcos em solo franco-argilo-arenoso Flow hydraulics and sediment transport in rills of a sandy clay loam soil

open access: yesRevista Brasileira de Ciência do Solo, 2005
A erosão em sulcos caracteriza-se pelo escoamento superficial concentrado de uma lâmina d'água com tensão de cisalhamento suficiente para desagregar o solo, que deforma o sulco e altera as características hidráulicas do escoamento responsável pela ...
José Ramon Barros Cantalice   +3 more
doaj   +1 more source

A review of the supercritical state of eruption‐fed volcanic density currents in subaerial and subaqueous settings

open access: yesSedimentology, EarlyView.
ABSTRACT Subaerial Pyroclastic Density Currents (PDCs) and Subaqueous Eruption‐Fed Density Currents (SEFDCs) produced during volcanic eruptions can present major hazards to surrounding communities and ecosystems. The bedforms deposited by these volcanic density currents can provide insights into the nature of transport and depositional processes, which
Shannon E. Frey   +2 more
wiley   +1 more source

Experimental bedforms by saline density currents

open access: yesBrazilian Journal of Geology, 2019
Bedforms are sedimentary features that can be generated on the seafloor by the interaction between density currents and mobile beds. Developing knowledge about the hydraulic and sedimentary processes involved during these events is in the interest of ...
Débora Koller   +3 more
doaj   +1 more source

Bifurcation analysis of a normal form for excitable media: Are stable dynamical alternans on a ring possible?

open access: yes, 2008
We present a bifurcation analysis of a normal form for travelling waves in one-dimensional excitable media. The normal form which has been recently proposed on phenomenological grounds is given in form of a differential delay equation.
Georg A. Gottwald   +5 more
core   +1 more source

Bed‐scale quantitative discrimination of hyperpycnites from intrabasinal turbidites—Results from a channelised slope system in the Upper Carboniferous Westward Ho! Formation, United Kingdom

open access: yesSedimentology, EarlyView.
ABSTRACT Features considered indicative of hyperpycnites and intrabasinal turbidites overlap. Outcrop study presented here suggests that the Westward Ho! Formation forms an 800 m high deepwater‐slope system dominated by hyperpycnites. Taking this unit, and other successions where hyperpycnites have been described, as having been deposited solely from ...
Tony Reynolds
wiley   +1 more source

A normal form for excitable media

open access: yes, 2006
We present a normal form for travelling waves in one-dimensional excitable media in form of a differential delay equation. The normal form is built around the well-known saddle-node bifurcation generically present in excitable media.
Georg A. Gottwald   +4 more
core   +2 more sources

CFD‐Based and Control‐Oriented Modeling of a Counterflow Heat Exchanger With Utilization of Parameter Identification

open access: yesProceedings in Applied Mathematics and Mechanics, Volume 26, Issue 2, June 2026.
ABSTRACT Counterflow heat exchangers (CHXs) thermally couple consumers and producers to a district heating network (DHN). Fluctuating loads and control actions naturally lead to unsteady operation conditions of the network and its components, posing a challenge for DHN models and CHX parameterizations based on Nusselt correlations that assume steady ...
Marten Klein   +5 more
wiley   +1 more source

Qualitative and quantitative analysis of stability and instability dynamics of positive lattice solitons

open access: yes, 2008
We present a unified approach for qualitative and quantitative analysis of stability and instability dynamics of positive bright solitons in multi-dimensional focusing nonlinear media with a potential (lattice), which can be periodic, periodic with ...
B. Crosignani   +13 more
core   +1 more source

Umbelliprenin in Food and Medicinal Plants: Phytochemical Occurrence, Biosynthesis, Analytical Approaches, and Biological Activities

open access: yesPhytochemicals in Food and Medicine, Volume 1, Issue 2, June 2026.
This review provides an extensive and critical synthesis of current knowledge on umbelliprenin, integrating phytochemical, analytical, biological, ecological, and food science perspectives, and identifies priorities for future research. ABSTRACT Umbelliprenin (7‐farnesyloxycoumarin) is an oxyprenylated coumarin that has gained increasing attention in ...
Chiara Collevecchio   +4 more
wiley   +1 more source

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