An Improved Prediction-Area Plot for Prospectivity Analysis of Mineral Deposits     

Roshanravan  Bijan  Aghajani  Hamid  Yousefi  Mahyar  Kreuzer  Oliver 《Natural Resources Research》2019,28(3):1089-1105

Natural Resources Research - In this paper an improved prediction-area plot has been developed. This type of plot includes performance measures similar to other existing methods (receiver operating...  相似文献   

Managed realignment as compensation for the loss of intertidal mudflat: A short term solution to a long term problem?     

Krysia Mazik  Will Musk  Oliver Dawes  Katya Solyanko  Sue Brown  Lucas Mander  Mike Elliott 《Estuarine, Coastal and Shelf Science》2010

Intertidal mudflats are critical to the functional ecology of estuaries yet large areas are being lost as a result of land claim, erosion and coastal squeeze. This study examines whether managed realignment (at Paull Holme Strays, Humber estuary) can realistically achieve compensation for the loss of intertidal mudflat in the long term. Typical estuarine species quickly colonised the site with the total number of species recorded from the site as a whole being almost equal to that in the reference area within one year. Comparable biomass between the two areas was achieved after 2 years. However, organism abundance remains an order of magnitude lower within the realignment site compared to outside. Community structure within the realignment has changed from one characterised by terrestrial/freshwater organisms and early colonising species to one composed of typically estuarine species. However, the developing benthic communities only represent those typical of the estuary in areas of low elevation and high inundation frequency. Rapid accretion has favoured saltmarsh colonisation in much of the realignment site and this is expected to increase as accretion proceeds with invertebrate colonisation being inhibited by increasing elevation. Hence, realignment to restore intertidal mudflats can only be a short term solution in sites of high tidal elevation and in a dynamic and turbid estuary with high natural accretion rates, such as the Humber.  相似文献   

Galaxy and cluster biasing from Local Group dynamics     

M. Plionis  S. Basilakos  M. Rowan-Robinson  S. J. Maddox  S. J. Oliver  O. Keeble  W. Saunders 《Monthly notices of the Royal Astronomical Society》2000,313(1):8-12

Comparing the gravitational acceleration induced on the Local Group of galaxies by different tracers of the underlying density field we estimate, within the linear gravitational instability theory and the linear biasing ansatz, their relative bias factors. Using optical SSRS2 galaxies, IRAS (PSC z ) galaxies and Abell/ACO clusters, we find b _O,I≈1.21±0.06 and b _C,I≈4.3±0.8, in agreement with other recent studies. Finally, there is an excellent one-to-one correspondence of the PSC z and Abell/ACO cluster dipole profiles, once the latter is rescaled by b _C,I, out to at least ∼150  h ⁻¹ Mpc.  相似文献   

The European Large Area ISO Survey – II. Mid-infrared extragalactic source counts     

Stephen Serjeant  Seb Oliver  †  Michael Rowan-Robinson  Hans Crockett  Vasilis Missoulis  Tim Sumner  Carlotta Gruppioni  Robert G. Mann  Nick Eaton  David Elbaz  David L. Clements  Amanda Baker  reas Efstathiou  Catherine Cesarsky  Luigi Danese  Alberto Franceschini  Reinhardt Genzel  y Lawrence  Dietrich Lemke  Richard G. McMahon  George Miley  Jean-Loup Puget  Brigitte Rocca-Volmerange 《Monthly notices of the Royal Astronomical Society》2000,316(4):768-778

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Axtell and Allende: A Mössbauer spectroscopic study     

E. Hoffman  D. Seifu  F. w. Oliver 《Meteoritics & planetary science》2000,35(2):431-434

Abstract— Mössbauer spectra showed the CV3 oxidized subgroup meteorites Allende and Axtell to be similar in olivine content and in a surprising lack of pronounced magnetic components, but different in Fe³⁺ phases. One atypical Allende sample showed an 8% area under the curve for magnetite, which is still less than a reported value for a CV3 reduced subgroup member. Allende's unusual Fe³⁺ spectral region distinguishes it from most other stony meteorites and is difficult to fit to known mineral parameters.  相似文献   

Spherical harmonic analysis of the PSCz galaxy catalogue: redshift distortions and the real-space power spectrum     

H. Tadros  W. E. Ballinger  A. N. Taylor  A. F. Heavens  G. Efstathiou  W. Saunders  C. S. Frenk  O. Keeble  R. McMahon  S. J. Maddox  S. Oliver  M. Rowan-Robinson  W. J. Sutherland  S. D. M. White 《Monthly notices of the Royal Astronomical Society》1999,305(3):527-546

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A Computer-Aided Learning Program for Teaching Effective Stress to Undergraduates     

A.W. Oliver  J. Oliphant 《Geotechnical and Geological Engineering》1999,17(2):85-97

A Computer-Aided Learning (CAL) program has been developed as a support aid for students learning the principle of effective stress and its application. The program called ESP (Effective Stress Program) has evolved over a period of two years as a result of research into student learning. This paper discusses the development, use and evaluation of the latest version of the program ESP98. ESP98 is shown to be an effective support tool by outperforming the conventional methods of instruction. The key to the success of ESP98 is the high level of interaction which students experience. The nature of the interaction is centred on a mistake-induced dialogue where the student is provided with progressive and instant feedback and guided towards the final answer. ESP has been integrated into the curriculum at Heriot-Watt University for the past two years and is freely available for use by other teaching institutions by contacting the authors.  相似文献   

A Morphological Classification Scheme for ULIRGs     

K.D. Borne  H. Bushouse  L. Colina  R.A. Lucas  A. Baker  D. Clements  A. Lawrence  S. Oliver  M. Rowan-Robinson 《Astrophysics and Space Science》1999,266(1-2):137-142

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Institutionalised religion: sacred texts and Jewish spatial practice     

Oliver Valins 《Geoforum》2000,31(4)

Institutionalised religion, as a powerful force in the structuring of the daily lives of probably the majority of the world’s population, is a field of social research to which geographers can usefully contribute. This paper examines ancient and contemporary forms of Judaism, exploring the underlying codes and regulations designed to structure every aspect of life. The first part of the paper examines institutionalised uses of space in ancient times, as recorded in the sacred Jewish text of the Talmud. Through the sacred geography of the great Temple in Jerusalem and the legal authority of the religious court to punish offenders, the social system was (in principle at least) highly ordered and regulated. The second part examines the institutionalisation of the religion in contemporary times, which for orthodox Jews involves attempting to practise and maintain these same ancient codes and regulations. Practising ancient ways of life in contemporary (post)modern contexts can be extremely difficult, however, which I discuss with reference to the proposals of the religious authorities in Manchester, England, to construct an eruv; a legalistic device consisting of poles and wires which changes the classification of space, allowing (in particular) the elderly, infirm and parents with young children to travel on the Sabbath. The device faces criticism from secular and religious sources over the rights to ‘claim space’ and the religious legalistic viability of the project.  相似文献   

The north-south asymmetry of sunspot areas during solar cycle 22     

R. Oliver  J. L. Ballester 《Solar physics》1994,152(2):481-485

We have analyzed the asymmetry of sunspot areas during the current solar cycle 22, finding that it has been statistically significant and that the shape of the underlying trend within the full asymmetry time series (1874–1993) indicates that the dominance of solar activity has started to shift, during the current cycle, from the northern hemisphere to the southern one.  相似文献