Georgia College & State University

About: Georgia College & State University is a education organization based out in Milledgeville, Georgia, United States. It is known for research contribution in the topics: Population & Context (language use). The organization has 950 authors who have published 1591 publications receiving 37027 citations.

On the spectral character of Toeplitz operators on planar regions

Abstract: Self-adjoint Toeplitz operators on multiply connected planar regions are investigated using theta functions on the double. An explicit resolvent form for self-adjoint Toeplitz operators on a Hardy space associated with any representing measure on a g-holed planar region is given via reproducing kernels in terms of theta functions on Cg. This resolvent formula is a generalization of an analogous formula obtained by K. F. Clancey (1991) for the case of harmonic measure. Applications of this resolvent form to the spectral type of the self-adjoint Toeplitz operators are described.

Evidence of Compton cooling during an X-ray flare supports a neutron star nature of the compact object in 4U1700-37

Abstract: This research has been supported by the grant ESP2014-53672-C3-3P. AB acknowledges support from STScI award 44A-1096046. JJRR acknowledges support from MECD fellowship PRX17/00114.

From college to the NBA: what determines a player’s success and what characteristics are NBA franchises overlooking?

Abstract: Considering NBA players who were drafted between 2006 and 2013, the author analyses the determinants of draft position, playing time and player productivity. By comparing these factors simultaneous...

Enhancement of Spatial Navigation Ability in Older Rats Following Chronic Administration of the Alpha2 Noradrenergic Antagonist Piperoxane

Abstract: The noradrenergic system of the locus coeruleus has been implicated in a variety of processes including reinforcement, attention, and acquisition and retention of learned behaviors. Its dense projections, some of which are shared by the cholinergic system, provide an ideal network within which to study the cognitive impairments related to aging. The current investigation explored the effects of piperoxane, an a2 noradrenergic receptor antagonist, on the performance of 18-and 24-month-old rats in the Morris water maze and a step-down passive avoidance task. Piperoxane injections (3 mg/kg, IP) facilitated the performance of the 18-month-old animals to levels comparable to those of the 8-month-old saline controls in constant-start, novel-start, and goal rotation testing variations of the Morris water maze. With the exception of the 24-month-old saline control group, all rats displayed retention on the step-down passive-avoidance task when tested 24 hours after training.

ORG 2766 fails to improve visual functions in rats with occipital lesions.

Abstract: Adult rats were trained on a white versus black card discrimination in a circular water tank. Three independent variables were manipulated: lesion (sham, lateral occipital, medial occipital), dose of ORG 2766 administered (0 or 25 micrograms in saline on alternate days for 18 days), and time of administration (during the post-surgical recovery interval or during post-operative testing). Both visual cortical lesions produced a prominent retention deficit and defective pattern vision. Neither post-surgical nor concurrent administration of ORG 2766 improved visual functions. These results, along with a growing body of evidence, challenge the generality of the positive influences of ORG 2766 upon behavioral recovery observed in animals with limbic lesions.