2,241 research outputs found
The Issue of Globalization-An Overview
[From Summary] In the 1990s, globalization gained widespread usage as a term with many interpretations. Globalism is employed in this report to describe networks of interdependence functioning at multi-continental distances. Globalization is an increase in globalism and de-globalization a reduction. In providing an introductory view of these networks, with an emphasis on contemporary economic factors, a goal of this report is to illustrate how policy consequences, sometimes unintended, may be dispersed via globalized networks. As networks expand and become more intricate there is an opportunity for feedback along previously non-existent linkages
ASSESSMENT OF THE PRICE IMPACT OF THE SOUTH CAROLINA CUCUMBER MARKETING ORDER
Demand and Price Analysis,
A sublimation heat engine
Heat engines are based on the physical realization of a thermodynamic cycle, most famously the liquid–vapour Rankine cycle used for steam engines. Here we present a sublimation heat engine, which can convert temperature differences into mechanical work via the Leidenfrost effect. Through controlled experiments, quantified by a hydrodynamic model, we show that levitating dry-ice blocks rotate on hot turbine-like surfaces at a rate controlled by the turbine geometry, temperature difference and solid material properties. The rotational motion of the dry-ice loads is converted into electric power by coupling to a magnetic coil system. We extend our concept to liquid loads, generalizing the realization of the new engine to both sublimation and the instantaneous vapourization of liquids. Our results support the feasibility of low-friction in situ energy harvesting from both liquids and ices. Our concept is potentially relevant in challenging situations such as deep drilling, outer space exploration or micro-mechanical manipulation
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