“Is there a bubble to burst?”-college students’ spatial perception of campus and the city,a case study of rhodes college in memphis,TN     

Shaolu Yu  Madalyn Bryant  Emily Messmer  Sophia Tsagronis  Sarah Link 《Urban geography》2013,34(10):1555-1575

ABSTRACT

This paper builds on the study of student geography by critically examining college students’ perceived space of a university campus and the surrounding urban space. Rhodes College is a liberal arts college situated in the city of Memphis. As a campus with a majority white population located in a predominately black city, Rhodes College exists within but often separate from the city. It serves as a perfect case study to investigate how the college students build relationships with the environment within and beyond the campus. By using mental mapping and focus groups, this research unpacks four spatialities that shape college students’ perception of the urban space: (in)activity space, (im)mobility, boundaries, and center. This research demonstrates that student geography can be gendered, classed and racialized. The perceived space is socially constructed, and is reinforced by the lived and material space. Finally, this paper provides implications to facilitate deeper connections between students, the campus, and the city.  相似文献   

Identification of sorption processes and parameters for radionuclide transport in fractured rock     

Zhenxue Dai  Andrew Wolfsberg  Paul Reimus  Hailin Deng  Edward Kwicklis  Mei Ding  Doug Ware  Ming Ye 《Journal of Hydrology》2012

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The WFCAM Science Archive     

N. C. Hambly  R. S. Collins  N. J. G. Cross  R. G. Mann  M. A. Read  E. T. W. Sutorius  I. Bond  J. Bryant  J. P. Emerson  A. Lawrence  L. Rimoldini  J. M. Stewart  P. M. Williams  A. Adamson  P. Hirst  S. Dye  S. J. Warren 《Monthly notices of the Royal Astronomical Society》2008,384(2):637-662

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Geotechnical characteristics of mississippi delta sediments,southeast Louisiana     

Sterling J. Helwick Jr.  William R. Bryant 《Marine Georesources & Geotechnology》2013,31(2):183-198

An investigation of the geotechnical properties of sediments from 57 boreholes drilled in West Delta and South Pass OSC Lease Areas, offshore Louisiana, indicated that sediment texture, shear strength, water content, and liquid limit vary significantly laterally and with depth. Samples are predominantly soft, fine‐grained sediments with high water content and medium to high plasticity. Firm, coarser‐grained sediments were obtained near the shoreline in South Pass OCS Lease Area and in the northern and eastern parts of West Delta OCS Lease Area. Trends in the distribution of geotechnical properties appear to be influenced by sediment texture and rate of sedimentation.  相似文献   

Fraction of young water as an indicator of aquifer vulnerability along two regional flow paths in the Mississippi embayment aquifer system,southeastern USA     

James A. Kingsbury  Jeannie R. B. Barlow  Bryant C. Jurgens  Peter B. McMahon  John K. Carmichael 《Hydrogeology Journal》2017,25(6):1661-1678

Wells along two regional flow paths were sampled to characterize changes in water quality and the vulnerability to contamination of the Memphis aquifer across a range of hydrologic and land-use conditions in the southeastern United States. The flow paths begin in the aquifer outcrop area and end at public supply wells in the confined parts of the aquifer at Memphis, Tennessee. Age-date tracer (e.g. SF₆, ³H, ¹⁴C) data indicate that a component of young water is present in the aquifer at most locations along both flow paths, which is consistent with previous studies at Memphis that documented leakage of shallow water into the Memphis aquifer locally where the overlying confining unit is thin or absent. Mixtures of young and old water were most prevalent where long-term pumping for public supply has lowered groundwater levels and induced downward movement of young water. The occurrence of nitrate, chloride and synthetic organic compounds was correlated to the fraction of young water along the flow paths. Oxic conditions persisted for 10 km or more down dip of the confining unit, and the presence of young water in confined parts of the aquifer suggest that contaminants such as nitrate-N have the potential for transport. Long-term monitoring data for one of the flow-path wells screened in the confined part of the aquifer suggest that the vulnerability of the aquifer as indicated by the fraction of young water is increasing over time.  相似文献   

Some Mathematical and Computational Problems in Reactive Flow     

Steven L. Bryant 《Computational Geosciences》2001,5(3):203-223

We present an overview of several applications of reactive flow and transport in which interesting mathematical issues and computational challenges arise. The topics include front propagation through porous media in the presence of dispersion; numerical simulation of large-scale reactive transport problems; the reliability of processes that involve in-situ generation of viscosifying agents; methods for describing pore-scale geometry in granular media; and the information content of reactive tracer experiments. The intent of this survey is to heighten awareness of underlying mathmetical aspects and, it is hoped, to stimulate new contributions in these areas.  相似文献   

Explaining State‐Environmental NGO Relations in the Philippines and Indonesia     

Raymond L. Bryant 《Singapore journal of tropical geography》2001,22(1):15-37

This paper explains how the notion of “critical engagement” has been a popular basis for NGO‐state relations in the Philippines and Indonesia. It has been used, moreover, in both liberal democratic (post‐1985 Philippines) and authoritarian (late 1960s to late 1990s Indonesia) political regimes. For both states and reform‐minded NGOs, critical engagement has represented a flexible means by which to pursue assorted political, economic and social ends. In a context of regional political and economic upheaval, it is likely to remain popular with both states and many NGOs for the foreseeable future.  相似文献   

Quaternary inheritance of coastal landforms,Cobourg Peninsula,northern territory     

C. D. Woodroffe  E. A. Bryant  D. M. Price  S. A. Short 《The Australian geographer》1992,23(2):101-115

In contrast to the abundant evidence of former shorelines on the sea floor of the Sahul Shelf in northern Australia, little evidence has been reported for late Pleistocene coastal landforms along the modern coast of north Australia. Using radiocarbon, thermoluminescence and uranium/thorium dating techniques, however, it can be shown that the present coastal morphology on the Cobourg Peninsula is partly inherited from features both deposited and eroded during the late Quaternary. Shore platforms, in particular, are veneered with ferricretes, some of which can be U/Th dated. In places bedforms are preserved within the ferricrete, suggesting that the platform existed at, and was modified during, the Last Interglacial, and probably formed during earlier interglacials. TL dating indicates that sands around Cape Don were deposited when sea level was lower, but may have been reworked during a Holocene high stand. A sequence of beach ridges at Smith Point indicates Holocene progradation over an earlier planation surface, and also provides support for slight Holocene emergence.  相似文献   

Upper mantle source for some hawaiites,mugearites and benmoreites     

D. H. Green  A. D. Edgar  P. Beasley  E. Kiss  N. G. Ware 《Contributions to Mineralogy and Petrology》1974,48(1):33-43

Chemical analyses of over seventy lavas or dykes containing spinel lherzolite inclusions of high pressure mineralogy, show that most host magmas are of alkali olivine basalt or basanite composition with relatively rare olivine nephelinites, and olivine melilitites. The 100 Mg/Mg+Fe⁺⁺ ratios of host magmas display a strong maximum at about Mg₇₀ consistent with partial melting of source peridotite with olivine of Fo_88–90. In contrast to these primary magmas, there occur some host magmas with 100 Mg/Mg+Fe⁺⁺<60 and with chemical compositions resembling those of classical hawaiite, mugearite, and nepheline benmoreite magmas. It is inferred that these magmas have been produced by crystal fractionation, within the upper mantle, of parental basanites or alkali olivine basalts. The presence of kaersutitic hornblende xenocrysts accompanying the lherzolite inclusions, and the nature of the chemical variation between associated basanites and nepheline benmoreites suggests that crystal fractionation has been dominated by kaersutitic hornblende, together with olivine and, in some cases, probably clinopyroxene. The mantle-derived nepheline benmoreite magmas also show similarities to some plutonic nepheline syenites.  相似文献   

Salt ramps: Wind-induced depositional features on Tunisian playas     

Andrew C. Millington  Nicholas A. Drake  Kevin White  Robert G. Bryant 《地球表面变化过程与地形》1995,20(2):105-113

Semicircular and crescent-shaped accumulations of salt crystals developed on salt crusts were measured on three Tunisian playas in September 1990. These features have been termed salt ramps. Their morphology and chemistry suggest that they are formed in the late stages of shallow ephemeral lake desiccation in playa basins. They form by salt precipitation from shallow brine lakes that are blown across salt-encrusted playa surfaces by the wind. Moreover, they appear to be short-lived features and their degradation is related to the flooding of playas with less saline water, and possibly rainfall and deflation.  相似文献