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Garland, TX, United States

Kersting W.H.,Milsoft Utility Solutions Inc. | Green R.K.,Garland Power and Light
2011 IEEE/PES Power Systems Conference and Exposition, PSCE 2011 | Year: 2011

One of the primary purposes of performing the steady-state analysis of a distribution feeder is to determine the voltages at every node. Because these voltages are a function of the line voltage drops it is critical that the line impedances used are as exact as possible. In 1926 John Carson developed equations that would determine the self and mutual impedances of any number of overhead or underground conductors taking into account the effect of ground [1]. In recent years the application of Carson's equation has become the standard for the computation of line impedances. Because Carson's equation results in an infinite series, approximations have been made to ease in the computation of the impedances. The purpose of this paper is to investigate some of the more common approximations and determine what, if any, errors are made. © 2011 IEEE.

Kerr A.L.,Garland Power and Light | Kerr A.L.,University of Wisconsin - Milwaukee | Hensel M.L.,Garland Power and Light | Hensel M.L.,University of Wisconsin - Milwaukee | And 7 more authors.
Behavior Genetics | Year: 2010

The present study was conducted in an effort to evaluate whether chromosomal substitution can repair impaired exploration learning and memory. It has previously been observed that Dahl salt-sensitive (SS) rodents exhibit impaired cognitive function along with abnormal physiological responses to muscle stimulation. Introgression of Brown Norway chromosome (13BN) has been found to restore normal physiological processes in SS animals. However, the effect of chromosomal substitution on cognitive performance has not been explored. It was hypothesized that 13BN also rescues cognitive impairments in these animals. Visual spatial learning and cognitive flexibility were evaluated using the Morris water maze (MWM) and the T-maze. This manipulation is effective in rescuing impaired task acquisition, but not perseveration observed in the SS animal. These animals may represent a natural animal model in which to isolate genetic information responsible for learning and memory function. © 2009 Springer Science+Business Media, LLC.

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