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Institution

University of Memphis

EducationMemphis, Tennessee, United States
About: University of Memphis is a education organization based out in Memphis, Tennessee, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 7710 authors who have published 20082 publications receiving 611618 citations. The organization is also known as: U of M.


Papers
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Journal ArticleDOI
TL;DR: This computational map of the ligand binding pocket provides information necessary for understanding the molecular pharmacology of this receptor, thus underlining the potential of the computational method in predicting ligand-receptor interactions.

170 citations

Journal ArticleDOI
TL;DR: The role of non-local (axonal) connections in generating and modulating phase transitions of collective activity in the neuropil is investigated and a relationship between critical values of the noise level and non-locality parameter to control the onset of phase transitions is derived.
Abstract: We model the dynamical behavior of the neuropil, the densely interconnected neural tissue in the cortex, using neuropercolation approach. Neuropercolation generalizes phase transitions modeled by percolation theory of random graphs, motivated by properties of neurons and neural populations. The generalization includes (1) a noisy component in the percolation rule, (2) a novel depression function in addition to the usual arousal function, (3) non-local interactions among nodes arranged on a multi-dimensional lattice. This paper investigates the role of non-local (axonal) connections in generating and modulating phase transitions of collective activity in the neuropil. We derived a relationship between critical values of the noise level and non-locality parameter to control the onset of phase transitions. Finally, we propose a potential interpretation of ontogenetic development of the neuropil maintaining a dynamical state at the edge of criticality.

170 citations

Journal ArticleDOI
TL;DR: Analytic modeling demonstrates that a simple nonlinearity accounts for the transformation between early (subcortical) brain activity and subsequent cortical/behavioral responses to speech thereby describing a plausible mechanism by which the brain achieves its acoustic-to-phonetic mapping.

170 citations

Journal ArticleDOI
TL;DR: In this article, a simple cliff erosion model with a realistic sea-level history, rock uplift and cliff retreat rule was used to find that the most important means of terrace removal is through the deeper transgression of a subsequent sea cliff into the landmass.
Abstract: Marine terraces are ephemeral planar landforms. While tectonic and climatic forcings responsible for the generation of existing marine terraces have operated for at least 1 Myr, terraces have been completely removed by erosion above a given altitude (and hence above a given age). Above this altitude, the landscape has forgotten that it was once terraced. We ask what controls this characteristic time-scale, which we term the ‘forget time’, in a landscape. We approach the problem with simple scaling arguments, and 1-D numerical models of landscape evolution. Using a simple cliff erosion model with a realistic sea-level history, rock uplift and a cliff retreat rule, we find that the most important means of terrace removal is through the deeper transgression of a subsequent sea cliff into the landmass. The sequence of preserved terraces depends upon the history of sea cliff incursion into the landmass. The extent of sea cliff incursion depends on the duration of the sea-level highstand, the far-field wave energy input and the degree to which bathymetric drag dissipates wave energy. This portion of the marine terrace survival problem is an example of a common problem in geomorphology, in which the record of past tectonic or climatic events is rendered incomplete by the potential for younger events to wipe the topographic slate clean. While sea cliffs decay through time, their form can still be recognized many hundreds of thousands of years after formation. This reflects the diffusive nature of their decay: early rapid evolution and lowering of maximum slopes yields to slower rates through time. Incision by streams, on the other hand, is rapid, as the streams respond to base-level history driven by sea-level changes. The rate of incision reflects the local climate conditions, and is limited by the rate of base-level fall. The principal means of vanquishing a marine terrace is by backwearing of slopes adjacent to these incising streams. The forget time should be proportional to the spacing between major incising streams and to the angle of hillslope stability, and should be inversely proportional to the rate of channel incision. This yields an overestimate of the forget time, as the terraced interfluves are reduced as well by the headward incision of tributary streams. The resulting landscape may be viewed as a terraced fringe separating the sea from the fully channellized landscape. Over time-scales corresponding to many glacial–interglacial sea-level oscillations, this fringe can achieve a nearly steady width. The rate of generation of new terraced landscape, reflecting the uplift rate pattern, is then balanced by the rate at which the terraces are erased beyond recognition by channel and hillslope processes. The width of this fringe should depend upon the precipitation, and upon the distance to the nearest drainage divide, both of which limit the maximum power available to drive channel incision.

169 citations

Journal ArticleDOI
TL;DR: Two RFID applications in telemedicine are proposed: studying supply and demand of doctors, nurses, and patients in hospitals and healthcare, and developing mobile telemedicsine services.
Abstract: Radio frequency identification systems have many applications in manufacturing, supply chain management, inventory control, and telemedicine. In an RFID system, products and objects are given RFID tags to identify themselves. However, security and privacy issues pose significant challenges on these systems. In this article we first briefly introduce RFID systems. Then two RFID applications in telemedicine are proposed: studying supply and demand of doctors, nurses, and patients in hospitals and healthcare, and developing mobile telemedicine services. The security and privacy issues of RFID, and their solutions are discussed as well.

169 citations


Authors

Showing all 7827 results

NameH-indexPapersCitations
James F. Sallis169825144836
Robert G. Webster15884390776
Ching-Hon Pui14580572146
James Whelan12878689180
Tom Baranowski10348536327
Peter C. Doherty10151640162
Jian Chen96171852917
Arthur C. Graesser9561438549
David Richards9557847107
Jianhong Wu9372636427
Richard W. Compans9152631576
Shiriki K. Kumanyika9034944959
Alexander J. Blake89113335746
Marek Czosnyka8874729117
David M. Murray8630021500
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202327
2022169
20211,049
20201,044
2019843
2018846