APPROXIMATE AND ANALYTICAL SOLUTIONS FOR SOLUTE TRANSPORT FROM AN INJECTION WELL INTO A SINGLE FRACTURE     

Chia-Shyun Chen  S. R. Yates 《Ground water》1989,27(1):77-86

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Septic Tank Density and Ground-Water Contamination   总被引：5，自引：0，他引：5  

Marylynn V. Yates 《Ground water》1985,23(5):586-591

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Book reviews     

David Turnock  P. M. Kelly  G. Kunkel  K. Strobach  K. -R. Nippes  William Ritchie  Claude Kergomard  W. R. Mead  Friedrich Wieneke  Ted Yates 《GeoJournal》1985,10(4):389-392

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Solid-state astrochemistry in star-forming regions     

Helen Fraser  David Williams  Ian Sims  Anita Richards  Jeremy Yates 《Astronomy& Geophysics》2003,44(4):4.29-4.33

Surface-catalysed chemical reactions, the molecules they form, and the implications for star formation were key themes in an international workshop on "Solid-state chemistry in star-forming regions" at the Lorentz Centre, Leiden University, the Netherlands from 14–17 April 2003. Helen Fraser, David Williams, Ian Sims, Anita Richards and Jeremy Yates report.  相似文献   

Measurements Of Thermal Updraft Intensity Over Complex Terrain Using American White Pelicans And A Simple Boundary-Layer Forecast Model     

Harlan D. Shannon  George S. Young  Michael A. Yates  Mark R. Fuller  William S. Seegar 《Boundary-Layer Meteorology》2002,104(2):167-199

An examination of boundary-layer meteorological and avian aerodynamic theories suggests that soaring birds can be used to measure the magnitude of vertical air motions within the boundary layer. These theories are applied to obtain mixed-layer normalized thermal updraft intensity over both flat and complex terrain from the climb rates of soaring American white pelicans and from diagnostic boundary-layer model-produced estimates of the boundary-layer depth z_i and the convective velocity scale w_*. Comparison of the flatland data with the profiles of normalized updraft velocity obtained from previous studies reveals that the pelican-derived measurements of thermal updraft intensity are in close agreement with those obtained using traditional research aircraft and large eddy simulation (LES) in the height range of 0.2 to 0.8 z_i. Given the success of this method, the profiles of thermal vertical velocity over the flatland and the nearby mountains are compared. This comparison shows that these profiles are statistically indistinguishable over this height range, indicating that the profile for thermal updraft intensity varies little over this sample of complex terrain. These observations support the findings of a recent LES study that explored the turbulent structure of the boundary layer using a range of terrain specifications. For terrain similar in scale to that encountered in this study, results of the LES suggest that the terrain caused less than an 11% variation in the standard deviation of vertical velocity.  相似文献   

Axisymmetry in protoplanetary nebulae: using imaging polarimetry to investigate envelope structure     

T. M. Gledhill  A. Chrysostomou  J. H. Hough  J. A. Yates 《Monthly notices of the Royal Astronomical Society》2001,322(2):321-342

We use ground-based imaging polarimetry to detect and image the dusty circumstellar envelopes of a sample of protoplanetary nebulae (PPNe) at near-infrared wavelengths. This technique allows the scattered light from the faint envelope to be separated from the glare of the bright central star, and is particularly well suited to this class of object. We detect extended (up to 9-arcsec diameter) circumstellar envelopes around 15 out of 16 sources with a range of morphologies including bipolars and shells. The distribution of scattered light in combination with its polarization (up to 40 per cent) provides unambiguous evidence for axisymmetry in 14 objects, showing this to be a common trait of PPNe. We suggest that the range of observed envelope morphologies results from the development of an axisymmetric dust distribution during the superwind phase at the end of the AGB. We identify shells seen in polarized light with scattering from these superwind dust distributions, which allows us to provide constraints on the duration of the superwind phase. In one object (IRAS 19475+3119) the circumstellar envelope has a two-armed spiral structure, which we suggest results from the interaction of the mass-losing star with a binary companion.  相似文献   

Making decisions to conserve species under climate change     

Luke P. Shoo  Ary A. Hoffmann  Stephen Garnett  Robert L. Pressey  Yvette M. Williams  Martin Taylor  Lorena Falconi  Colin J. Yates  John K. Scott  Diogo Alagador  Stephen E. Williams 《Climatic change》2013,119(2):239-246

Severe impacts on biodiversity are predicted to arise from climate change. These impacts may not be adequately addressed by conventional approaches to conservation. As a result, additional management actions are now being considered. However, there is currently limited guidance to help decision makers choose which set of actions (and in what order) is most appropriate for species that are considered to be vulnerable. Here, we provide a decision framework for the full complement of actions aimed at conserving species under climate change from ongoing conservation in existing refugia through various forms of mobility enhancement to ex situ conservation outside the natural environment. We explicitly recognize that allocation of conservation resources toward particular actions may be governed by factors such as the likelihood of success, cost and likely co-benefits to non-target species in addition to perceived vulnerability of individual species. As such, we use expert judgment of probable tradeoffs in resource allocation to inform the sequential evaluation of proposed management interventions.  相似文献   

Book reviews     

G. Kunkel  Gerd Wikan  Richard F. Logan  Viggo Hansen  Barry Floyd  Roland Bono  J. Fernie  E. M. Yates 《GeoJournal》1986,12(2):223-226

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Maser Mapping and Dust Properties of Red Supergiant Winds     

Anita M.S Richards  R. J. Cohen  J. A. Yates 《Astrophysics and Space Science》1997,251(1-2):55-62

Maser emission from the circumstellar envelopes of four late-type red supergiants has been mapped with milli-arcsecond resolution using MERLIN1. The wind is driven by radiation pressure on dust and the structure and kinematics of the masing regions reflect the dust properties. The unbeamed radius of water maser blobs, ∼ 10¹² m, has been measured for the first time. The velocity gradient is used to derive the dust absorption coefficient which increases with radius from ≤ 0.1 to ≤ 1.0 m² kg⁻¹. Comparison with laboratory studies suggests that small crystalline grains are formed near the star and are annealed into astronomical silicates at larger distances. This revised version was published online in September 2006 with corrections to the Cover Date.  相似文献   

Galactic environment and the 10-μm silicate feature of young stellar objects     

J. E. Bowey  A. J. Adamson  J. A. Yates 《Monthly notices of the Royal Astronomical Society》2003,340(4):1173-1189

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