Regional and cellular fractionation of working���memory

This chapter recounts efforts to dissect the cellular and circuit basis of a memory system in the primate cortex with the goal of extending the insights gained from the study of normal brain organization in animal models to an understanding of human cognition and related memory disorders. Primates and humans have developed an extraordinary capacity to process information ���on line,��� a capacity that is widely considered to underlay comprehension, thinking, and so-called executive functions. Understanding the interactions between the major cellular constituents of cortical circuits���pyramidal and nonpyramidal cells���is considered a necessary step in unraveling the cellular mechanisms subserving working memory mechanisms and, ultimately, cognitive processes. Evidence from a variety of sources is accumulating to indicate that dopamine has a major role in regulating the excitability of the cortical circuitry upon which the working memory function of prefrontal cortex depends. Here, I describe several direct and indirect intercellular mechanisms for modulating working memory function in prefrontal cortex based on the localization of dopamine receptors on the distal dendrites and spines of pyramidal cells and on interneurons in the prefrontal cortex. Interactions between monoamines and a compromised cortical circuitry may hold the key to understanding the variety of memory disorders associated with aging and disease.

Studies of retrograde memory: A long-term���view

Studies of retrograde amnesia are reviewed. First, the issues of temporal gradients of retrograde amnesia are discussed. Second, the question of the anatomical substrates of this syndrome are considered. Finally, some evidence for fractionation of different classes of memoranda within the retrograde time period are presented.

The deferred imitation task as a nonverbal measure of declarative memory.

We tested amnesic patients, patients with frontal lobe lesions, and control subjects with the deferred imitation task, a nonverbal test used to demonstrate memory abilities in human infants. On day 1, subjects were given sets of objects to obtain a baseline measure of their spontaneous performance of target actions. Then different event sequences were modeled with the object sets. On day 2, the objects were given to the subjects again, first without any instructions to imitate the sequences, and then with explicit instructions to imitate the actions exactly as they had been modeled. Control subjects and frontal lobe patients reproduced the events under both uninstructed and instructed conditions. In contrast, performance by the amnesic patients did not significantly differ from that of a second control group who had the same opportunities to handle the objects but were not shown the modeled actions. These findings suggest that deferred imitation is dependent on the brain structures essential for declarative memory that are damaged in amnesia, and they support the view that infants who imitate actions after long delays have an early capacity for long-term declarative memory.

Kinetic study and thermal decomposition behavior of viscoelastic memory foam

A systematic investigation of the thermal decomposition of viscoelastic memory foam (VMF) was performed using thermogravimetric analysis (TGA) to obtain the kinetic parameters, and thermogravimetric analysis coupled to Fourier Transformed Infrared Spectrometry (TGA-FTIR) and thermogravimetric analysis coupled to Mass Spectrometry (TGA-MS) to obtain detailed information of evolved products on pyrolysis and oxidative degradations. Two consecutive nth-order reactions were employed to correlate the experimental data from dynamic and isothermal runs performed at three different heating rates (5, 10 and 20 K/min) under an inert atmosphere. On the other hand, for the kinetic study of the oxidative decomposition, the data from combustion (synthetic air) and poor oxygen combustion (N2:O2 = 9:1) runs, at three heating rates and under dynamic and isothermal conditions, were correlated simultaneously. A kinetic model consisting of three consecutive reactions presented a really good correlation in all runs. TGA-FTIR analysis showed that the main gases released during the pyrolysis of VMF were determined as ether and aliphatic hydrocarbons, whereas in combustion apart from the previous gases, aldehydes, amines and CO2 have also been detected as the main gases. These results were confirmed by the TGA-MS.

Annexe II: Analyse de la situation politique en Mediterranee et dans les pays du golfe el les risques sur les approvisionnements petroliers et gaziers 1) Algerie & Pays D'Afrique du Nord 2) Pays de L'Est Mediterraneen et du Golfe. OME, Draft du 18 April 1995 = Annex II: Analysis of the political situation in the Mediterranean and the Gulf countries and risks on petroleum and gas supplies 1) Pays D'Algerie & North Africa 2) Country of Eastern Mediterraneen and the Gulf. OME, Draft of 18 April 1995

None.

US bilateral regional agreements: The negative welfare effects of multiplicity in country of origin rules - A new methodology. ACES Working Papers No. 2, 2008

The intent of this paper is to present a formal methodology for estimating rules of origin requirements. Section II of the paper presents the concept of the ROO. Earlier attempts to capture the costs of ROO are presented in Section III. Our suggested methodology relying on the tariff equivalents literature is presented in Section IV.

A topographical and historical description of the country of Southampton : containing an account of its towns, seats, antiquities, churches, public edifices, scenery, and residences of the nobility, gentry, &c. : accompanied with biographical notices of eminent and learned men to whom this county has given birth /

Includes bibliographical references.

Of a temporary character : an historic structure report of first fort, second fort, and the arsenal and historical base map, Fort Union National Monument, Fort Union, New Mexico /

Includes bibliographical references (p. [93]-101).

Recent improvement of Illiac memory /

"March 25, 1953"

Improving the performance of virtual memory computers /

"UILU-ENG 78 1741."

Analysis and design of interleaved memory systems

Thesis (M.S.)--Universty of Illinois at Urbana-Champaign.

Marking the country of origin on semiconductors.

Mode of access: Internet.