The application of fecundity estimates to determine the spawning stock biomass of Irish Sea Nephrops norvegicus (L.) using the annual larval production method     

Briggs  R. P.; Armstrong  M. J.; Dickey-Collas  M.; Allen  M.; McQuaid  N.; Whitmore  J. 《ICES Journal of Marine Science》2002,59(1):109-119

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Growth, survival, diet, and on-growing husbandry of haddock Melanogrammus aeglefinus in tanks and netpens     

Treasurer  James W.; Sveier  Harald; Harvey  Warren; Allen  Roddy; Cutts  Christopher J.; Mazorra de Quero  Carlos; Ford  Leslie 《ICES Journal of Marine Science》2006,63(2):376-384

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A numerical method for the solution of a line source under a free surface     

Iskender Sahin  Assistant Professor  Allen H. Magnuson  Asssciate Professor 《Ocean Engineering》1984,11(5):451-461

A modified source-and-dipole type singularity panel method is proposed to calculate the flow properties for an oscillating arbitrary body in the presence of a free surface. The technique is based on Green's identity whereby the boundary value problem is expressed as a boundary integral equation which is solved numerically. The free-space Green function is used in the integral equation. To demonstrate the feasibility of the method, the problem of a pulsating submerged line source under a free surface is treated and results are compared with the exact solution.An excellent agreement with the theory is obtained for panel density of about ten panels per wavelength and paneled water surface length of two wavelengths with very low computing times, indicating the feasibility of the method for unsteady water wave problems.  相似文献   

The drying up of Britain? A national estimate of changes in seasonal river flows from 11 Regional Climate Model simulations     

Christel Prudhomme  Andy Young  Glenn Watts  Tracey Haxton  Sue Crooks  Jennifer Williamson  Helen Davies  Simon Dadson  Stuart Allen 《水文研究》2012,26(7):1115-1118

As climate change may modify the hydrological cycle significantly, understanding the impact on river flow is important because it affects long‐term water resources planning. Here, we describe a high‐resolution British assessment of changes in river flows in the 2050s under 11 different realisations of HadRM3. In winter, river flows may either increase or decrease, with a wide range of possible decreases in summer flow. These results should encourage adaptation that copes with a broad range of future hydrological conditions. Copyright © 2011 John Wiley & Sons, Ltd.  相似文献   

Removing the Pressure Limitations on Flux Pile-Up Reconnection     

M. Jardine  H. R. Allen 《Solar physics》1998,177(1-2):411-414

In a recent Letter, Litvinenko, Forbes, and Priest (1996) claimed that the rate of the very fast flux-pile up reconnection is severely limited by the effects of plasma pressure. They considered however only two-dimensional, zero-vorticity flows. Here we show that this limitation is a feature of these restrictive assumptions and can be removed by relaxing either of them.  相似文献   

SOME ASPECTS OF THE MEMBERSHIP AND MEETINGS OF THE ASSOCIATION OF AMERICAN GEOGRAPHERS BEFORE 1949*     

Allen D. Bushong 《The Professional geographer》1974,26(4):435-439

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Association between Messinian drainage network formation and major tectonic activity in the Marche Apennines (Italy)     

Sonia Scarselli  Guy D. H. Simpson  Philip A. Allen  Giorgio Minelli  Lorenzo Gaudenzi 《地学学报》2007,19(1):74-81

The Marche Apennines (Italy) offer an excellent opportunity to constrain the temporal and spatial relationships between drainage network formation and tectonic activity. Using a combination of field data, seismic lines and boreholes we show that the main deformation phase took place during the Messinian when the area, affected by the Messinian sea level drop, emerged and evolved from marine to continental conditions. The results highlight that during the Messinian emersion a drainage network developed contemporaneously with an increase in tectonic activity that could be related to sea level fall and river erosion. The present‐day river system, which is dominated by transverse rivers that cut straight across the tectonic grain, is located in older Messinian palaeovalleys, even though the region was subsequently covered by water until the late Pliocene–early Pleistocene.  相似文献   

The Millennium Galaxy Catalogue: the B-band attenuation of bulge and disc light and the implied cosmic dust and stellar mass densities     

Simon P. Driver  Cristina C. Popescu  Richard J. Tuffs  Jochen Liske  Alister W. Graham  Paul D. Allen  Roberto De Propris 《Monthly notices of the Royal Astronomical Society》2007,379(3):1022-1036

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Determination of Selenium Concentrations in NIST SRM 610, 612, 614 and Geological Glass Reference Materials Using the Electron Probe, LA-ICP-MS and SHRIMP II     

Frances E. Jenner  Peter Holden  John A. Mavrogenes  Hugh St.C. O'Neill  Charlotte Allen 《Geostandards and Geoanalytical Research》2009,33(3):309-317

A combination of EMPA, sensitive high resolution ion microprobe (SHRIMP II) and/or LA-ICP-MS techniques was used to measure the concentration of selenium (Se) in NIST SRM 610, 612, 614 and a range of reference materials. Our new compiled value for the concentration of Se in NIST SRM 610 is 112 ± 2 μg g⁻¹. The concentration of Se in NIST SRM 612, using NIST SRM 610 for calibration, determined using LA-ICP-MS (confirmed using SHRIMP II) was 15.2 ± 0.2 μg g⁻¹. The concentration of Se in NIST SRM 614, using LA-ICP-MS was 0.394 ± 0.012 μg g⁻¹. LA-ICP-MS determination of Se in synthetic geological glasses BCR-2G, BIR-1G, TB-1G and the MPI-DING glasses showed a range in concentrations from 0.062 to 0.168 μg g⁻¹. Selenium in the natural glass, VG2, was 0.204 ± 0.028 μg g⁻¹.  相似文献   

Implications of population ageing: Opportunities and risks     

Ruth ES Allen 《New Zealand geographer》2008,64(3):243-244

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