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Positioning Australia for the Future

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Engineering 2020年第8期6卷 857-859页

作者： Nicholas brown John Dawson Ryan Ruddick Director of National Geodesy Geoscience AustraliaAustralia Director of Positioning Geoscience AustraliaAustralia Director of GNSS Infrastructure and Informatics Geoscience AustraliaAustralia

*** In 2018,the Australian Commonwealth Government committed 224.9 million AUD(160 million USD)to the Positioning Australia program in order to provide 10 cm accurate and reliable positioning to all Australians and accelerate the adoption and development of positioning technology and *** is a significant improvement from the 5–10 m accuracy that can currently be achieved using consumer positioning *** speaking,Australia is in the position to take advantage of highquality,accurate,and efficient space-based positioning constellations with view of all global and regional constellations,including those of the United States(Global Positioning System,GPS),Russia(Global Navigation Satellite System,GLONASS),the European Union(Galileo),China(BeiDou),Japan(Quasi-Zenith Satellite System,QZSS),and India(Indian Regional Navigation Satellite System,IRNSS).

关键词： Indian Australia Galileo

The Pleiomorphic Plant MTOC:An Evolutionary Perspective

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Journal of Integrative Plant Biology 2007年第8期49卷 1142-1153页

作者： RoyC.brown BettyE.Lemmon Department of Biology University of Louisiana-LafayetteLafayetteLA 70504USA

γ-Tubulin is an essential component of the microtubule organizing center （MTOC） responsible for nucleating microtubules in both plants and animals. Whereas γ-tubulin is tightly associated with centrosomes that are inheritable organelles in cells of animals and most algae, it appears at different times and places to organize the myriad specialized microtubule systems that characterize plant cells. We have traced the distribution of γ-tubulin through the cell cycle in representative land plants （embryophytes） and herein present data that have led to a concept of the pleiomorphic and migratory MTOC. The many forms of the plant MTOC at spindle organization constitute pleiomorphism, and stage-specific “migration” is suggested by the consistent pattern of redistribution of γ-tubulin during mitosis. Mitotic spindles may be organized at centriolar centrosomes （only in final divisions of spermatogenesis）, polar organizers （POs）, plastid MTOCs, or nuclear envelope MTOCs （NE-MTOCs）. In all cases, with the possible exception of centrosomes in spermatogenesis, the γ-tubulin migrates to broad polar regions and along the spindle fibers, even when it is initially a discrete polar entity. At anaphase it moves poleward, and subsequently migrates from polar regions （distal nuclear surfaces） into the interzone （proximal nuclear surfaces） where interzonal microtubule arrays and phragmoplasts are organized. Following cytokinesis, γ-tubulin becomes associated with nuclear envelopes and organizes radial microtubule systems （RMSs）. These may exist only briefly, before establishment of hoop-like cortical arrays in vegetative tissues, or they may be characteristic of interphase in syncytial systems where they serve to organize the common cytoplasm into nuclear cytoplasmic domains （NCDs）.

关键词： angiosperms bryophytes cell cycle life cycle microtubule mitosis γ-tubulin.

A new framework for reverse cholesterol transport: Non-biliary contributions to reverse cholesterol transport

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World Journal of Gastroenterology 2010年第47期16卷 5946-5952页

作者： Ryan E Temel J Mark brown Department of Pathology Section on Lipid SciencesWake Forest University School of Medicine

Reduction of low-density lipoprotein-cholesterol through statin therapy has only modestly decreased coronary heart disease (CHD)-associated mortality in developed countries, which has prompted the search for alternative therapeutic strategies for CHD. Major efforts are now focused on therapies that augment high-density lipoprotein (HDL)-mediated reverse cholesterol transport (RCT), and ultimately increase the fecal disposal of cholesterol. The process of RCT has long been thought to simply involve HDL-mediated delivery of peripheral cholesterol to the liver for biliary excretion out of the body. However, recent studies have revealed a novel pathway for RCT that does not rely on biliary secretion. This nonbiliary pathway rather involves the direct excretion of cholesterol by the proximal small intestine. Compared to RCT therapies that augment biliary sterol loss, modulation of non-biliary fecal sterol loss through the intestine is a much more attractive therapeutic strategy, given that excessive biliary cholesterol secretion can promote gallstone formation. However, we are at an early stage in understanding the molecular mechanisms regulating the non-biliary pathway for RCT, and much additional work is required in order to effectively target this pathway for CHD prevention. The purpose of this review is to discuss our current understanding of biliary and nonbiliary contributions to RCT with particular emphasis on the possibility of targeting the intestine as an inducible cholesterol secretory organ.

关键词： Cholesterol Intestine Bile Lipoprotein Reverse cholesterol transport

Spatial context in the calculation of gas emissions for underground coal mines

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International Journal of Mining Science and Technology 2017年第5期27卷 787-794页

作者： Patrick Booth Heidi brown Jan Nemcik Ren Ting School of Civil Mining and Environmental EngineeringSchool of Earth and Environmental SciencesUniversity of WollongongWollongong 2500Australia

The prediction of gas emissions arising from underground coal mining has been the subject of extensive research for several decades, however calculation techniques remain empirically based and are hence limited to the origin of calculation in both application and resolution. Quantification and management of risk associated with sudden gas release during mining(outbursts) and accumulation of noxious or combustible gases within the mining environment is reliant on such predictions, and unexplained variation correctly requires conservative management practices in response to risk. Over 2500 gas core samples from two southern Sydney basin mines producing metallurgical coal from the Bulli seam have been analysed in various geospatial context including relationships to hydrological features and geological structures. The results suggest variability and limitations associated with the present traditional approaches to gas emission prediction and design of gas management practices may be addressed using predictions derived from improved spatial datasets, and analysis techniques incorporating fundamental physical and energy related principles.

关键词： Gas emission prediction Spatial analysis Underground coal mining Risk management Greenhouse gas Climate

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Editorial

Journal of Rock Mechanics and Geotechnical Engineering 2017年第2期9卷 195-196页

作者： E.T. brown Golder Associates Pty. Ltd. P.O. Box 1734 Milton QLD 4064 Australia

The Aims and Scope of the Journal of Rock Mechanics and Geotechnical Engineering(JRMGE)indicate that it"is concerned with the latest research achievements in rock mechanics and geotechnical engineering The topics covered by the JRMGE include new theories,new technologies,new methods and experiences,in-situ and laboratory tests,new developments,case studies and timely reviews on selected subjects in rock mechanics and geotechnical engineering."

关键词： Scope Journal Mechanics

Genre Fiction; Science Fiction; The Quest for Utopia

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外国文学研究 2005年第6期27卷 36-40页

作者： Charles N. brown founder and editor-in-chief of Locus Publications USA 23-time Hugo winner

This paper will discuss the difference between genre fiction and mainstream fiction, the difference between science fiction and other fields of genre fiction, and in particular, the philosophical use of science fiction in our search for a better world. All genres used to be called ″romance″ to distinguish them from ″true″ novels. There were arguments about it in Hawthorne’s The House of Seven Gables and in a heated exchange between H.G. Wells and Henry James. I will talk about this difference. All genre fiction pays attention to the external world, but science fiction is the only one of them that looks forward by being grounded in the present. Is science fiction really a genre? There are some doubts. Science fiction is not about science per se, but about the philosophy of science:the study of the external world and its relation to man. It is ideal for ″thought experiments.″ By exploring possible futures, we cannot only examine our present world, but can see ways in which it can be improved. Hence, science fiction is the search for, if not utopia, then at least a better world. This paper will also discuss the ideas of Kim Stanley Robinson, Ursula K. Le Guin, and others in their search for a better future.

关键词：美国文学研究虚构小说科学小说

Back Analysis in Rock Engineering

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Journal of Rock Mechanics and Geotechnical Engineering 2018年第3期10卷 611-612页

作者： E.T.brown Golder Associates Pty Ltd

This volume is the fourth in the International Society for Rock Mechanics and Rock Engineering(ISRM)Book Series,edited by Professor Xia-Ting Feng,ISRM Past-President and Vice Editor-in-Chief of this *** author,Professor Shunsuke Sakurai,of Kobe University,Japan,has also had a long and distinguished association with the ISRM,having served as the Society’s ninth President in the

关键词： In Back Analysis in Rock Engineering

Counting rational points on cubic curves

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Science China Mathematics 2010年第9期53卷 2259-2268页

作者： HEATH-brown Roger TESTA Damiano Mathematical Institute University of OxfordOxfordUK

We prove upper bounds for the number of rational points on non-singular cubic curves defined over the *** bounds are uniform in the curve and involve the rank of the corresponding *** method used in the proof is a com... 详细信息

关键词： cubic curves rational points counting function elliptic curves determinant method m-descent

The largest prime factor of the integers in an interval

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Science China Mathematics 1996年第5期39卷 449-476页

作者： D.R.Heath-brown Magdalen College University of OxfordOxford OXI 4AUUK

Let ε>*** is proved that the range (x,x+x1:2+ε) has such an integer that one of its prime factors

关键词： prime number sieve method asymptotic formula.