Institution
Curtin University
Education•Perth, Western Australia, Australia•
About: Curtin University is a education organization based out in Perth, Western Australia, Australia. It is known for research contribution in the topics: Population & Zircon. The organization has 14257 authors who have published 48997 publications receiving 1336531 citations. The organization is also known as: WAIT & Western Australian Institute of Technology.
Topics: Population, Zircon, Poison control, Context (language use), Health care
Papers published on a yearly basis
Papers
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TL;DR: The antiquity of the taxa in the modern Indo-Australian Archipelago hotspot emphasizes the role of pre-Pleistocene events in shaping modern diversity patterns.
Abstract: Hotspots of high species diversity are a prominent feature of modern global biodiversity patterns. Fossil and molecular evidence is starting to reveal the history of these hotspots. There have been at least three marine biodiversity hotspots during the past 50 million years. They have moved across almost half the globe, with their timing and locations coinciding with major tectonic events. The birth and death of successive hotspots highlights the link between environmental change and biodiversity patterns. The antiquity of the taxa in the modern Indo-Australian Archipelago hotspot emphasizes the role of pre-Pleistocene events in shaping modern diversity patterns.
414 citations
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TL;DR: In this article, the SHRIMP U-Pb zircon ages from two samples of Mg-Al granulite and one of normal khondalite from the Khondalites belt of Inner Mongolia, North China Craton were reported.
414 citations
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ASTRON1, University of Amsterdam2, Max Planck Society3, University of California, Berkeley4, Chinese Academy of Sciences5, Cornell University6, Commonwealth Scientific and Industrial Research Organisation7, McGill University8, Curtin University9, Columbia University10, University of Vermont11, National Radio Astronomy Observatory12, California Institute of Technology13, Joint Institute for Nuclear Research14, West Virginia University15, Search for extraterrestrial intelligence16, Radboud University Nijmegen17, Case Western Reserve University18
TL;DR: Observations of FRB 121102 show almost 100 per cent linearly polarized emission at a very high and variable Faraday rotation measure, demonstrating that the fast radio burst source is in an extreme and dynamic magneto-ionic environment, and the short durations of the bursts suggest a neutron star origin.
Abstract: Fast radio bursts are millisecond-duration, extragalactic radio flashes of unknown physical origin(1-3). The only known repeating fast radio burst source(4-6)-FRB 121102-has been localized to a star-forming region in a dwarf galaxy(7-9) at redshift 0.193 and is spatially coincident with a compact, persistent radio source(7,10). The origin of the bursts, the nature of the persistent source and the properties of the local environment are still unclear. Here we report observations of FRB 121102 that show almost 100 per cent linearly polarized emission at a very high and variable Faraday rotation measure in the source frame (varying from + 1.46 x 10(5) radians per square metre to + 1.33 x 10(5) radians per square metre at epochs separated by seven months) and narrow (below 30 microseconds) temporal structure. The large and variable rotation measure demonstrates that FRB 121102 is in an extreme and dynamic magneto-ionic environment, and the short durations of the bursts suggest a neutron star origin. Such large rotation measures have hitherto been observed(11,12) only in the vicinities of massive black holes (larger than about 10,000 solar masses). Indeed, the properties of the persistent radio source are compatible with those of a low-luminosity, accreting massive black hole(10). The bursts may therefore come from a neutron star in such an environment or could be explained by other models, such as a highly magnetized wind nebula(13) or supernova remnant(14) surrounding a young neutron star.
413 citations
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TL;DR: A major contribution of the work presented in this thesis is the successful implementation of a system of techniques to solve the graph theoretic model, particularly when applied to large ore-bodies, at a fraction of the time required by current software packages.
Abstract: A fundamental problem in open pit mine planning is that of determining the optimum ultimate pit limits of the mine. These limits are that pit contour which is the result of extracting a volume of material which maximises the difference between the value of extracted ore and the total extraction cost of ore and waste whilst satisfying certain practical operational requirements, such as, safe wall slopes. The determination of the optimum pit contour provides information which is essential in the evaluation of the economic potential of the mineral deposit. A number of optimisation techniques have been proposed for determining the optimum pit contour. Of these techniques, those based on graph theory, linear programming and dynamic programming are mathematically rigorous, but only those based on graph theory are more suited to solving the three-dimensional problem. Unfortunately, direct application of these techniques to large ore-bodies may cause considerable difficulties because of the exceptionally high demand on computer storage and time requirements. Indeed, 25 years of research effort has not satisfactorily resolved these computational problems. A major contribution of the work presented in this thesis is the successful implementation of a system of techniques to solve the graph theoretic model, particularly when applied to large ore-bodies. A measure of this success is the fact that pits, as much as seven times larger, may be designed with a given amount of computer storage, at a fraction of the time required by current software packages. The solution strategy presented involves the application of a modified Dime's Maximum Flow algorithm, together with an efficient 'data reducing' technique. Computational results of these techniques applied on data from gold producing mines in Western Australia are used to demonstrate the success of this strategy. The relationships between the rigorous pit optimisation techniques are also considered in this work. In particular, the Lerchs-Grossman graph-theoretic method is shown
413 citations
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Bielefeld University1, Max Planck Society2, Australia Telescope National Facility3, California Institute of Technology4, National Radio Astronomy Observatory5, Chinese Academy of Sciences6, Goddard Space Flight Center7, Albert Einstein Institution8, ASTRON9, Curtin University10, Cornell University11, INAF12, Pennsylvania State University13, Notre Dame of Maryland University14, University of Orléans15, Centre national de la recherche scientifique16, Peking University17, Hillsdale College18, University of British Columbia19, University of Edinburgh20, West Virginia University21, Vancouver Coastal Health22, University of Amsterdam23, Columbia University24, Monash University25, University of Manchester26, Lafayette College27, Texas Tech University28, University of Virginia29, Paris Diderot University30, Swinburne University of Technology31, University of Birmingham32, University of Wisconsin–Milwaukee33, Oberlin College34, University of New Mexico35, Huazhong University of Science and Technology36, University of Western Australia37, Southwest University38
TL;DR: In this article, the first joint analysis of the data from the three regional pulsar timing arrays (IPTA) is presented, i.e. of the first IPTA data set, and the approach presently followed for its combination and suggest improvements for future PTA research.
Abstract: The highly stable spin of neutron stars can be exploited for a variety of (astro)physical investigations. In particular, arrays of pulsars with rotational periods of the order of milliseconds can be used to detect correlated signals such as those caused by gravitational waves. Three such 'pulsar timing arrays' (PTAs) have been set up around the world over the past decades and collectively form the 'International' PTA (IPTA). In this paper, we describe the first joint analysis of the data from the three regional PTAs, i.e. of the first IPTA data set. We describe the available PTA data, the approach presently followed for its combination and suggest improvements for future PTA research. Particular attention is paid to subtle details (such as underestimation of measurement uncertainty and long-period noise) that have often been ignored but which become important in this unprecedentedly large and inhomogeneous data set. We identify and describe in detail several factors that complicate IPTA research and provide recommendations for future pulsar timing efforts. The first IPTA data release presented here (and available on-line) is used to demonstrate the IPTA's potential of improving upon gravitational-wave limits
412 citations
Authors
Showing all 14504 results
Name | H-index | Papers | Citations |
---|---|---|---|
David Smith | 129 | 2184 | 100917 |
Christopher G. Maher | 128 | 940 | 73131 |
Mike Wright | 127 | 775 | 64030 |
Shaobin Wang | 126 | 872 | 52463 |
Mietek Jaroniec | 123 | 571 | 79561 |
John B. Holcomb | 120 | 733 | 53760 |
Simon A. Wilde | 118 | 390 | 45547 |
Jian Liu | 117 | 2090 | 73156 |
Meilin Liu | 117 | 827 | 52603 |
Guochun Zhao | 113 | 406 | 40886 |
Mark W. Chase | 111 | 519 | 50783 |
Robert U. Newton | 109 | 753 | 42527 |
Simon P. Driver | 109 | 455 | 46299 |
Peter R. Schofield | 109 | 693 | 50892 |
Gao Qing Lu | 108 | 546 | 53914 |