The SCUBA HAlf Degree Extragalactic Survey – III. Identification of radio and mid-infrared counterparts to submillimetre galaxies     

R. J. Ivison  T. R. Greve  J. S. Dunlop  J. A. Peacock  E. Egami  Ian Smail  E. Ibar  E. van Kampen  I. Aretxaga  T. Babbedge  A. D. Biggs  A. W. Blain  S. C. Chapman  D. L. Clements  K. Coppin  D. Farrah  M. Halpern  D. H. Hughes  M. J. Jarvis  T. Jenness  J. R. Jones  A. M. J. Mortier  S. Oliver  C. Papovich  P. G. Pérez-González  A. Pope  S. Rawlings  G. H. Rieke  M. Rowan-Robinson  R. S. Savage  D. Scott  M. Seigar  S. Serjeant  C. Simpson  J. A. Stevens  M. Vaccari  J. Wagg  C. J. Willott 《Monthly notices of the Royal Astronomical Society》2007,380(1):199-228

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The calculated seismic properties of quartz mylonites with typical fabrics: relationship to kinematics and temperature     

David Mainprice  Martin Casey 《Geophysical Journal International》1990,103(3):599-608

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Model Validation and Performance Evaluation for The Multi-Tethered Aerostat Subsystem of the Large Adaptive Reflector     

Meyer Nahon  Casey Lambert  Dean Chalmers  Wen Bo 《Experimental Astronomy》2004,17(1-3):163-175

The Canadian design for the Square Kilometre Array radio telescope includes a large multi-tethered aerostat to support the telescope’s receiver. To validate this design concept, two parallel tracks have been undertaken: a numerical simulation of the multi-tethered aerostat system has been assembled, and a one-third scale prototype of the system has been constructed. This paper describes the experimental facility, presents results from initial tests of the uncontrolled system and compares these results to the predictions of the computer model of the system. Generally, the results compare very favourably. Using the simulation, we arrive at two important design philosophies to be used in the design of the full-scale system: (a) perturbations on the confluence point should be minimized, and (b) the system stiffness should be maximized to ensure minimum response to disturbances.  相似文献   

Cooperation between bound waters and hydroxyls in controlling isotope-exchange rates     

Adele F. Panasci  J. Gregory McAlpin  C. André Ohlin  Shauna Christensen  James C. Fettinger  R. David Britt  James R. Rustad  William H. Casey 《Geochimica et cosmochimica acta》2012

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Tellurium speciation under hydrothermal conditions     

Pascal V. Grundler  Joël Brugger  Allan Pring  Paul G. Spry  William H. Casey  Lothar Helm  Weihua Liu  Stacey Borg  Barbara Etschmann 《Journal of Geochemical Exploration》2009

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Community, difference and identity: the case of the Irish in Sheffield     

Casey R 《Irish geography : bulletin of the Geographical Society of Ireland》2010,43(3):211-232

There is a growing body of research in racial and ethnic studies on the processes of identity construction within minority ethnic populations. This article seeks to build on this work by analysing emerging collective identity formations in an ‘invisible’ minority ethnic group. Based upon focus groups and in-depth interviews with Irish people in Sheffield, the article aims to advance three key arguments. First, the concept of community is central to an Irish collective identity, but is negotiated in a multiplicity of ways. Second, Irish collective identity has been shaped not only by demographic differences but by shared experiences of non-recognition and stereotyping. Third, there is a simultaneous assertion of an Irish identity running parallel with a perception that the ‘traditional’ Irish community may have to re-invent itself in response to changing demographics at the local level. The paper concludes by considering the implications of these arguments for an understanding of Irish ethnicity in multicultural Britain.  相似文献   

Evaluation of fibre rope properties for offshore mooring     

S Banfield  N Casey 《Ocean Engineering》1998,25(10):861-879

An examination has been conducted of fibre rope mechanical properties measured in laboratory tests on materials, constructions and terminations intended for deepwater mooring applications. This data, combined with field experience, provide a better understanding of rope behaviour and enhances the knowledge required to engineer fibre ropes for these demanding applications.This has also led to improved laboratory test techniques for measurement of mechanical properties relevant to mooring system response analyses required to meet regulatory requirements. Preliminary evaluation of the data also indicates that a post-test evaluation method to determine retained properties of insert strops removed from mooring lines may be possible.  相似文献   

Delineating extent and magnitude of river flooding to lakes across a northern delta using water isotope tracers     

Casey R. Remmer  Tanner Owca  Laura Neary  Johan A. Wiklund  Mitchell Kay  Brent B. Wolfe  Roland I. Hall 《水文研究》2020,34(2):303-320

Hydrological monitoring in complex, dynamic northern floodplain landscapes is challenging, but increasingly important as a consequence of multiple stressors. The Peace-Athabasca Delta in northern Alberta, Canada, is a Ramsar Wetland of International Importance reliant on episodic river ice-jam flood events to recharge abundant perched lakes and wetlands. Improved and systematic monitoring of landscape-scale hydrological connectivity among freshwater ecosystems (rivers, channels, wetlands, and lakes) is needed to guide stewardship decisions in the face of climate change and upstream industrial development. Here, we use water isotope compositions, supplemented by measurements of specific conductivity and field observations, from 68 lakes and 9 river sites in May 2018 to delineate the extent and magnitude of spring ice-jam induced flooding along the Peace and Athabasca rivers. Lake-specific estimates of input water isotope composition (δ_I) were modelled after accounting for influence of evaporative isotopic enrichment. Then, using the distinct isotopic signature of input water sources, we develop a set of binary mixing models and estimate the proportion of input to flooded lakes attributable to river floodwater and precipitation (snow or rain). This approach allowed identification of areas and magnitude of flooding that were not captured by other methods, including direct observations from flyovers, and to demarcate flow pathways in the delta. We demonstrate water isotope tracers as an efficient and effective monitoring tool for delineating spatial extent and magnitude of an important hydrological process and elucidating connectivity in the Peace-Athabasca Delta, an approach that can be readily adopted at other floodplain landscapes.  相似文献   

Amounts,forms, and management of nitrogen and phosphorus export from agricultural peatlands     

Casey D. Kennedy  Anthony R. Buda  Ray B. Bryant 《水文研究》2020,34(8):1768-1781

Peatlands provide a setting that is well suited for cranberry agriculture in the Northeastern United States. However, misconceptions exist about the amounts and forms of nitrogen (N) and phosphorus (P) export from cranberry farms. In this study, we report inorganic and organic forms of N and P export from five peatlands cultivated for cranberry production in southeastern, Massachusetts, United States. We then compare N loading rates among cranberry farms in southeastern Massachusetts, row crop farms in the Midwestern United States, and uncultivated peatlands in the United States and United Kingdom. Based on a fluvial mass balance analysis, we find that nonriparian cranberry farms export 2.56 kg of P ha⁻¹ year⁻¹of total P and 12.1 kg of N ha⁻¹ year⁻¹of total N. Total N export from riparian or “flow through” farms is two times higher than nonriparian farms due to less retention of N fertilizer in the vadose zone of riparian farms. Gross total N export from riparian and nonriparian cranberry farms consists of 35% particulate organic N, 26% dissolved organic N, 31% ammonium (NH₄⁺), and 8% nitrate (NO₃⁻). The low proportions of NO₃⁻ export (13% of total dissolved N [TDN]) for cranberry farms differ from NO₃⁻ export for row crop farms (75% of TDN; p < .001) but not for uncultivated peatlands (17% of TDN; p = .61). Despite being highly modified by fertilizers and artificial drainage, low NO₃⁻ export (2.2 kg of N ha⁻¹ year⁻¹) from cranberry farms is consistent with field measurements of rapid N turnover in uncultivated peatlands. This finding suggests that state-funded wetland restoration efforts to restore denitrification in retired cranberry farms may be limited by NO₃⁻ rather than soil moisture or organic matter.  相似文献   

Structural controls on mechanical compaction within sandstones: An example from the Apsheron Peninsula,Azerbaijan     

Christine Souque  Quentin J. Fisher  Martin Casey  Peter Bentham 《Marine and Petroleum Geology》2010

Mechanical compaction of sand-rich reservoirs usually occurs during shallow burial and involves the rearrangement of framework grains and the ductile deformation of soft lithoclasts. The reservoir quality (porosity and permeability) of some Neogene sandstones of the South Caspian Basin has, however, been dramatically reduced by mechanical compaction involving extensive grain-fracturing (i.e. porosity collapse). These sandstones were probably susceptible to pervasive grain-fracturing because they were buried rapidly and experienced compressional deformation prior to reaching 80 °C. Consequently, they did not undergo quartz cementation and were therefore exposed to high stresses while they were extremely weak. Grain-size and structural position are also important controls on the distribution of grain fracturing in the onshore analogue in the Apsheron Peninsula. Microstructural analysis confirms that susceptibility to distributed grain-fracturing increases with increasing grain-size. Structural position has also an important impact on the distribution of porosity collapse. In particular, sandstones within the hinges of folded sections have undergone much more extensive grain-fracturing than within the surrounding area; the increased stresses in this structural position have enhanced distributed grain-fracturing and subsequent deformation band development.  相似文献