Results 21 to 30 of about 452,946 (300)
MANAGEMENT OF SUSTEINABLE DEVELOPMENT AND ECONOMIC REVIVAL OF MINING AREAS AFFECTED BY RESTRUCTURING [PDF]
Analele Universităţii Constantin Brâncuşi din Târgu Jiu : Seria Economie, 2013 Sustainable development of an area or region, as a process of change, of economic and jobs development, entails, in the context of what it summarizes through the dualism: ecosystem-ecoeficiency, community concern over the current and future situation of ...
Valeriu Pleşea +2 more
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Dynamic evolution mechanism of water-bearing coal permeability and water film under stress
Meitan kexue jishu, 2023 To explore coal permeability evolution mechanism under the comprehensive action of multiple factors including stress - adsorption - water and slippage effect, considering the coal deformation induced by stress - adsorption, the expression of water film ...
Shulei DUAN +3 more
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Digital Cognitive Phenotyping for Differential Diagnosis and Monitoring in Neurological Conditions
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective To assess the utility, accessibility, and equivalence to supervised scales of online cognitive assessment in older individuals with cognitive impairment. Methods Patients with Alzheimer's disease (AD, n = 31), idiopathic normal pressure hydrocephalus (iNPH, n = 26), and traumatic brain injury (TBI, n = 23) completed online cognitive ...
Martina Del Giovane +10 more
wiley +1 more source
The effect of hard coal density on its flotation performance [PDF]
Acta Montanistica Slovaca, 2005 Hard coal flotation depends on many factors, one of which is the density of the grains floated. The heavier the grain, the greater the gravitational force that counteracts the force of adhesion between the grain and an air bubble, and the lower the ...
Ewa Małysa
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Using geophysical density logging to estimate the thickness and density of coal seams in the Southern region of Brazil [PDF]
REM: International Engineering JournalThis study shows the usefulness of borehole geophysical logging of density in the identification of coal seams, in relation to other lithologies present in a coal deposit located in the south of Brazil. Four drillholes were studied.
Barbara Victoria Reffatti Andrade +4 more
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A Study on the Hard Coal Grindability Dependence on Selected Parameters
Energies, 2021 A very important aspect of proper preparation of the coal mixture for the coking process is its appropriate grinding. One of the parameters describing the energy input required for grinding is the Hardgrove index.
Krzysztof Kogut +7 more
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Laser‐Induced Graphene from Waste Almond Shells
Advanced Functional Materials, EarlyView.Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova +9 more
wiley +1 more source
Scientific ReportsFrequent failures of roadway anchor bolts in the roof-dripping zones of the Tashan coal mine endanger roadway stability and safety. To clarify the stress-corrosion cracking (SCC) mechanism and identify mitigation strategies, we combined water-chemistry ...
Lei Wang +4 more
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Meitan kexue jishuThe reserves and production of thick coal seams account for half of the total reserves and production of raw coal in China. By combing the history of thick coal seam mining, we summarize the technology and equipment development practice of thick coal ...
Huijun HAN +5 more
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Tools available for methane recovery from mines belonging to C.E.H. Petroşani [PDF]
MATEC Web of ConferencesMine gas is present both in coals and in the surrounding rocks and basically consists of methane (some-times almost 100%) mixed with carbon dioxide (up to 5%) with nitrogen (a few percent) and traces of carbon monoxide.
Chiuzan Emeric, Matei Adrian
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