Rapid urbanization and population growth in China have raised great concerns regarding food security caused by the loss of limited cultivated land. In this study, we used remotely sensed data and an agricultural productivity estimation model to characterize the spatiotemporal patterns of the conversion of cropland into urban land and quantify its impacts on agricultural productivity potential d...

assess the ecological effects of economic activity on the water, earth and man in the iranian economy approach using input - output tablewater is a vital resource for each biological and economic phenomenon. water is considered as a production input. production is not possible without water in all economic sectors. also, the environment including air, soil, fauna and plants utilize water in the...

SUMMARY Measurement of systemic vascular resistance in man currently requires arterial and venous cannulation, so that cardiac output and mean arterial blood pressure may be simultaneously determined. This report describes a noninvasive technic for determining systemic vascular resistance (SVR.), utilizing an ultrasonic method for cardiac output measurement, and a combination of sphygmomanometr...

The role of input noise is seldom considered in robot calibration. The methodology of total least squares may be applied to handle both input and output noise in robot calibration. Experimentally, we apply this method towards joint torque sensor calibration, and towards kinematic calibration of a redundant parallel-drive spherical joint in a variant called the implicit loop method.

THE INCREASING clinical use of hexamethonium, a ganglion blocking agent, makes desirable a detailed knowledge of its acute hemodynamic effects in normotensive man. Recent work on dogs' indicates that the hexamethonium-induced fall in arterial pressure is accompanied by significant decrease in cardiac output with increase in the calculated total peripheral resistance. Accordingly, the authors co...

HARAKAL, CONCETTA,MARCUS M. REIDENBERG,ROGER W. SEW, AND EDWIN A. OHLER. Hemodynamic effects of adrenal medullectomy in the dog. Am. J. Physiol. 210(r): 5-6. I g66.-Adrenal medullas were successfully removed from dogs leaving intact, functioning adrenal cortical tissue on one side. Following medullectomy there was a decrease in cardiac output and an increase in total peripheral resistance, but ...

The purpose of this paper is to consider the extent to which the area and quality of land limit the level of food production in the UK. As the population and its disposable income have increased so has the land area devoted to non-agricultural activities. In addition, the area of tree planting has been enlarged to replace the depleted reserves of forest. Simultaneously a great deal of research,...

We propose two identification algorithms for quantitating the total peripheral resistance (TPR) baroreflex, an important contributor to short-term arterial blood pressure (ABP) regulation. Each algorithm analyzes beat-to-beat fluctuations in ABP and cardiac output, which may both be obtained noninvasively in humans. For a theoretical evaluation, we applied both algorithms to a realistic cardiov...

The watershed (DAS) Deli is one of the priority watersheds in the Medium Term Development Plan in 2010-2014 according to the Ministry of Forestry decree (SK 328/Menhut-II/2009), Indonesia. DAS is a complex ecological system in which there is a dynamic equilibrium between the incoming material energy (input) and the material out (output). Naturally, the change in input and output balance is slow...