Thomsen M.,Harvard University |
Barrett A.C.,Synchrony |
Negus S.S.,Virginia Commonwealth University |
Caine S.B.,Harvard University
Journal of the Experimental Analysis of Behavior | Year: 2013
We have adapted a nonhuman primate model of cocaine versus food choice to the rat species. To evaluate the procedure, we tested cocaine versus food choice under a variety of environmental manipulations as well as pharmacological pretreatments. Complete cocaine-choice dose-effect curves (0-1.0 mg/kg/infusion) were obtained for each condition under concurrent fixed ratio schedules of reinforcement. Percentage of responding emitted on the cocaine-reinforced lever was not affected significantly by removal of cocaineassociated visual or auditory cues, but it was decreased after removal of response-contingent or responseindependent cocaine infusions. Cocaine choice was sensitive to the magnitude and fixed ratio requirement of both the cocaine and food reinforcers. We also tested the effects of acute (0.32, 0.56, 1.0, 1.8 mg/kg) and chronic (0.1, 0.32 mg/kg/hr) d-amphetamine treatment on cocaine choice. Acute and chronic damphetamine had opposite effects, with acute increasing and chronic decreasing cocaine choice, similar to observations in humans and in nonhuman primates. The results suggest feasibility and utility of the choice procedure in rats and support its comparability to similar procedures used in humans and monkeys. Source
Synchrony | Date: 2015-05-18
A system for collecting solar energy using a plurality of energy collection elements arranged in a planar array within a stationary base structure, each comprising: an energy capture unit with optical means of focusing directional sunlight parallel to its axis onto one or more sunlight-to-electricity converters within itself, and means of sensing divergence of its axis from the suns direction; and an angular positioning unit that orients said capture unit about two nested axes by slidably mounting two arcuate tracks in opposed and perpendicular arcuate slots, a convex track within said energy capture unit and a concave track within said base structure, each said slot equipped with a drive apparatus that engages its respective track and moves the positioner along it. The invention provides methods for determining the shapes and arrangement of such elements so as to maximize aperture efficiency while preventing collisions of adjacent elements.
Synchrony | Date: 2016-04-07
Providing a website featuring downloadable information, publications, and articles in the field of business management, including business growth strategies, leadership and organizational planning, and business optimization operation plans. Business organization and management consulting; Business consulting services in business growth and leadership development and business operations management. Providing a website featuring non-downloadable articles in the field of business management, including business growth strategies, leadership and organizational planning, and business optimization operation plans; Providing an Internet website portal in the field of business management, including business growth strategies, leadership and organizational planning, and business optimization operation plans.
Synchrony | Date: 2015-10-22
Synchrony | Date: 2011-06-23
Certain exemplary embodiments can provide a system, machine, device, manufacture, circuit, composition of matter, and/or user interface adapted for and/or resulting from, and/or a method and/or machine-readable medium comprising machine-implementable instructions for, activities that can comprise and/or relate to: via a thrust stator of a magnetic bearing, the thrust stator adapted to be split into sectors so that a shaft of a machine can be removed from the magnetic bearing, producing an axi-symmetric field at each pole face of the thrust stator when the sectors are operatively assembled in the machine; and/or a magnetic bearing thrust stator, comprising a plurality of stator sectors, each of the stator sectors comprising a semi-circumferentially slotted stator portion comprising a plurality of semi-circumferential poles and a first coil portion shaped to fit substantially within the semi-circumferentially slotted stator portion.