Results 31 to 40 of about 19,131,340 (388)

Spatial aggregation effects on the performance of machine learning metamodels for predicting transit time to baseflow

open access: yesEnvironmental Research Communications, 2023
Water transit time is the duration between the entry and exit of a parcel of water across a hydrologic system. It is a fundamental characteristic that links hydrologic transport, biogeochemical processing, and water quality, and it has broad implications
Mario A Soriano Jr, Reed Maxwell
doaj   +1 more source

Influence of Temperature and Residence Time on Torrefaction Coupled to Fast Pyrolysis for Valorizing Agricultural Waste

open access: yesEnergies, 2022
Torrefaction is a promising pretreatment technology for valorizing biomass and upgrading pyrolysis products. This study sets out an original procedure consisting of subjecting the biomass to torrefaction before fast pyrolysis to increased value-added ...
Angel Alcazar-Ruiz   +2 more
doaj   +1 more source

Atmospheric residence time of CH3Br estimated from the junge spatial variability relation [PDF]

open access: yes, 1998
The atmospheric residence time for methyl bromide (CH3Br) has been estimated as 0.8 +/- 0.1 years from its empirical spatial variability relative to C2H6, C2Cl4, CHCl3, and CH3Cl.
Blake, DR, Colman, JJ, Rowland, FS
core   +1 more source

Litter Decomposition in Wet Rubber and Fruit Agroforests: Below the Threshold for Tropical Peat Formation

open access: yesSoil Systems, 2022
Peatlands are shaped by slow litter decomposition, but threshold decomposition rates that allow peat formation remain unclear. Can agroforestry in the tropics be compatible with paludiculture that allows peat formation?
Yosefin Ari Silvianingsih   +3 more
doaj   +1 more source

Probability distribution of residence times of grains in models of ricepiles [PDF]

open access: yes, 2005
We study the probability distribution of residence time of a grain at a site, and its total residence time inside a pile, in different ricepile models. The tails of these distributions are dominated by the grains that get deeply buried in the pile.
D. Dhar   +5 more
core   +2 more sources

The Impact of a New Arterial Intravascular Pump on Aorta Hemodynamic Surrounding: A Numerical Study

open access: yesBioengineering, 2022
Purpose: The purpose of this study was to investigate the impact of a new arterial intravascular pump on the hemodynamic surroundings within the aorta.
Yuan Li   +6 more
doaj   +1 more source

A residence time theory for biodiversity

open access: yesThe American Naturalist, 2018
From microorganisms to the largest macroorganisms, much of Earth’s biodiversity is subject to forces of physical turnover. Residence time is the ratio of an ecosystem’s size to its rate of flow and provides a means for understanding the influence of physical turnover on biological systems.
Locey, Kenneth J, Lennon, Jay T
openaire   +2 more sources

Fractional diffusion modeling of ion channel gating [PDF]

open access: yes, 2004
An anomalous diffusion model for ion channel gating is put forward. This scheme is able to describe non-exponential, power-law like distributions of residence time intervals in several types of ion channels.
A. L. Hodgkin   +15 more
core   +1 more source

Process mapping of laser surface modification of AISI 316L stainless steel for biomedical applications [PDF]

open access: yes, 2009
A 1.5-kW CO2 laser in pulsed mode at 3 kHz was used to investigate the effects of varied laser process parameters and resulting morphology of AISI 316L stainless steel. Irradiance and residence time were varied between 7.9 to 23.6 MW/cm2 and 50 to 167 µs
A.N. Samant   +17 more
core   +2 more sources

Inline Determination of Residence Time Distribution in Hot-Melt-Extrusion

open access: yesPharmaceutics, 2018
In the framework of Quality-by-Design (QbD), the inline determination of process parameters or quality attributes of a product using sufficient process analytical technology (PAT) is a center piece for the establishment of continuous processes as a ...
Jens Wesholowski   +2 more
doaj   +1 more source

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