نتایج جستجو برای: thermal variable measurement

تعداد نتایج: 890828  

2017
M. Bayani Cardenas Judson W. Harvey Aaron I. Packman Durelle T. Scott

Temperature is a primary physical and biogeochemical variable in aquatic systems. Field-based measurement of temperature at discrete sampling points has revealed temperature variability in fluvial systems, but traditional techniques do not readily allow for synoptic sampling schemes that can address temperature-related questions with broad, yet detailed, coverage. We present results of thermal ...

2015
Joshua Martin J Martin

In Seebeck coefficient metrology, the present diversity in apparatus design, acquisition methodology and contact geometry has resulted in conflicting materials data that complicate the interlaboratory confirmation of reported high efficiency thermoelectric materials. To elucidate the influence of these factors in the measurement of the Seebeck coefficient at high temperature and to identify opt...

Journal: :The Journal of experimental biology 2003
Roberto F Nespolo Matías Arim Francisco Bozinovic

Body size is one of the most important determinants of energy metabolism in mammals. However, the usual physiological variables measured to characterize energy metabolism and heat dissipation in endotherms are strongly affected by thermal acclimation, and are also correlated among themselves. In addition to choosing the appropriate measurement of body size, these problems create additional comp...

Journal: :journal of nanostructures 2012
m. jafar-tafreshi f. bustanafruz m. fazli

aluminum sulfate nano structures have been prepared by solution combustion synthesis using aluminum nitrate nonahydrate (al(no3)3.9h2o) and ammonium sulfate ((nh4)2so4). the resultant aluminum sulfate nano structures were calcined at different temperatures to study thermal  decomposition of aluminum sulfate. the crystallinity and phase of  the as-synthesized and calcined samples were characteri...

Journal: :The Journal of chemical physics 2013
Nicholas S Shuman Thomas M Miller Albert A Viggiano Jürgen Troe

Thermal rate constants and product branching fractions for electron attachment to CF3Br and the CF3 radical have been measured over the temperature range 300-890 K, the upper limit being restricted by thermal decomposition of CF3Br. Both measurements were made in Flowing Afterglow Langmuir Probe apparatuses; the CF3Br measurement was made using standard techniques, and the CF3 measurement using...

2010
Nicole Hassoun

Debates about poverty relief and foreign aid often hinge on claims about how many poor people there are in the world and what constitutes poverty. Good measures of poverty are essential for addressing the world poverty problem. Measures of poverty require a basis for determining who is poor and a method of aggregation. Historically, the methods of aggregation were quite simple. The headcount in...

2013
Radovan Hajovsky Jiri Hajovsky Martin Pies

The paper is focused on the measurement and use of thermal processes at old mining dumps. It describes the causes of occurrence of thermal processes, including their negative impacts. It also describes technology of heat collection. Much of the paper is devoted to a description of the pilot projects that deal with collection and subsequent use of the heat in the selected mining dumps. The end o...

2012
M. Hatridge S. Shankar M. Mirrahimi F. Schackert K. Geerlings T. Brecht K. M. Sliwa B. Abdo L. Frunzio S. M. Girvin R. J. Schoelkopf M. H. Devoret

Measuring a quantum system can randomly perturb its state. The strength and nature of this back-action depends on the quantity which is measured. In a partial measurement performed by an ideal apparatus, quantum physics predicts that the system remains in a pure state whose evolution can be tracked perfectly from the measurement record. We demonstrate this property using a superconducting qubit...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2002
Mitsuhiro Kawasaki

The experimental time scale dependence of thermodynamic relations in out-of-equilibrium systems with aging phenomena is investigated theoretically by using only aging properties of the two-time correlation functions and the generalized fluctuation-dissipation theorem. We show that there are two experimental time regimes characterized by different thermal properties. In the first regime where th...

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