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5篇 您的检索式:作者名="Aaron Jones"
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1A causation mechanism for coal bursts during roadway development based on the major horizontal stress in coal:Very specific structural geology causing a localised loss of effective coal confinement and Newton’s second law显示文摘In 2017,one of the international authorities on coal bursts,Mark Christopher,published a paper entitled'Coal bursts that occur during development:A rock mechanics enigma',in which several relevant technical issues were identified.This paper outlines what is considered to be a credible,first-principles,mechanistic explanation for these three current development coal burst conundrums by reference to early published coal testing work examining the significance of a lack of'constraint'to coal stability and an understanding of how very specific structural geology and other geological features can logically cause this to occur in situ,albeit on a statistically very rare basis.This basic model is examined by reference to published information pertaining to the development coal-burst that occurred at the Austar Coal Mine in New South Wales,Australia,in 2014 and from the Sunnyside District in Utah,the United States.The'cause and effect'model for development of coal bursts presented also offers a meaningful explanation for the statistical improbability for what are nonetheless potentially highly-destructive events,being able to explain the statistical rarity being just as important to the credibility of the model as explaining the local conditions associated with burst events.The model could also form the basis for a robust,riskbased approach utilising a'hierarchy of controls',to the operational management of the development coal burst threat.Specifically,the use of pre-mining predictions for likely burst-prone and non-burstprone areas,the use of the mine layout to avoid or at least minimise mining within burst-prone areas if appropriate,and finally the development of an operational Trigger Action Response Plan(TARP)that reduces the likelihood of inadvertent roadway development into a burst-prone area without suitable safety controls already being in place.Russell Frith Guy Reed Aaron Jones 2020International Journal of Mining Science and Technology2020,30,1:3
2Ectomycorrhizal and Saprotrophic Fungal Communities Vary Across mm-Scale Soil Microsites Differing in Phosphatase Activity显示文摘To understand nutrient cycling in soils, soil processes and microorganisms need be better characterized. To determine whether specific trophic groups of fungi are associated with soil enzyme activity, we used soil imprinting to guide mm-scale sampling from microsites with high and low phosphatase activities in birch/Douglas-fir stands. Study 1 involved sampling one root window per site at 12 sites of different ages(stands);study 2 was conducted at one of the stem-exclusion stands, at which 5 root windows had been installed. Total fungal and ectomycorrhizal(EM) fungal terminal-restriction fragment length polymorphism(TRFLP)fingerprints differed between high-and low-phosphatase activity microsites at 8 of 12 root windows across 12 sites. Where differences were detected, fewer EM fungi were detected in high-than low-phosphatase activity microsites. Using 5 root windows at one site,next-generation sequencing detected similar fungal communities across microsites, but the ratio of saprotrophic to EM fungal reads was higher in high-phosphatase activity microsites in the two windows that had low EM fungal richness. In windows with differences in fungal communities, both studies indicated that EM fungi were less successful than saprotrophic fungi in colonizing fine-scale,organic matter-rich microsites. Fine-scale sampling linked with in situ detection of enzyme activity revealed relationships between soil fungal communities and phosphatase activity that could not be observed at the scales employed by conventional approaches, thereby contributing to the understanding of fine-scale phosphorus cycling in forest soils.Aaron GODIN Denise BROOKS Sue J. GRAYSTON Melanie D. JONES 2019Pedosphere2019,29,3:2
3Bone induction by decalcifiied bone matrix and mRNA of TGF and IGF-Ι increased by ELF field stimulation显示文摘Aaron RK Ciombor D Jones AR 1997Trans Orthop Res Soc1997,22,5:1
4Active surveillance of small renal masses offers short‐term oncological efficacy equivalent to radical and partial nephrectomy显示文摘Nilay Patel David Cranston M. Zeeshan Akhtar Caroline George Andrew Jones Aaron Leiblich Andrew Protheroe Mark Sullivan 2012BJU International2012,,:1
5Intelligent retrieval of archieved meteorological data显示文摘Eric K Jones Aaron Roydhouse 1995IEEE Expert1995,10,6:1
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