A microprocessor-controlled automatic extractor, (PREMTM I) is described with which lipophilic components may be extracted from physiological fluids by means of a selective, solid-phase extraction cartridge, and the extracts presented in dry form for subsequent analysis. This instrument has been successfully evaluated for the extraction of phenobarbital, primidone, and phenytoin from human seru...

Laissez-Faire is a novel design for backscatter communication that enables much higher data rates. The key idea is simple and elegant. The authors note that low-power backscatter systems, e.g., RFIDs, transmit their signal using ON-OFF keying –i.e., they convey bits by transitioning the signal between two levels, up and down. However, since their bit rate is low (tens of kbps), they have a smal...

Trade liberalization and laissez-faire economics are altering the structure of agricultural production and trade. The principle of comparative advantage, a classic tenet of economics, is a useful tool for understanding the future of world agriculture. This study employs a " Revealed Comparative Advantage " approach to investigate patterns of comparative advantage among six major wool exporting ...