نتایج جستجو برای: constant temperature

تعداد نتایج: 649224  

2016
Slobodan J. Petricevic Pedja Mihailovic

Compensation of the temperature dependence of the Verdet constant in a polarimetric extrinsic Faraday sensor is of major importance for applying the magneto-optical effect to AC current measurements and magnetic field sensing. This paper presents a method for compensating the temperature effect on the Faraday rotation in a Bi12GeO20 crystal by sensing its optical activity effect on the polariza...

2011
Biao Zhu Weixin Cheng

In a 122-day incubation experiment with two soil types under four temperature treatments, we examined whether the temperature sensitivity of soil organic carbon (SOC) decomposition differed between constant and diurnally-varying soil temperature regimes. We calculated the Q10 values after accounting for changes in substrate availability and quality among treatments over time. The Q10 values und...

Journal: :journal of computational & applied research in mechanical engineering (jcarme) 2013
t. sudhakar reddy m. c. raju s. v. k. varm

in the present paper, an analysis was carried out to investigate effects of radiation on a free convection flow bounded by a vertical surface embedded in a porous medium with constant suction velocity. it was under the influence of uniform magnetic field in the presence of a homogenous chemical reaction and viscous dissipation with constant heat and mass flux. the non-dimensional governing equa...

2006
Hans-Heinrich Carstensen Anthony M. Dean Olaf Deutschmann

A possible source of chain-branching in low temperature combustion is thermal decomposition of alkyl hydroperoxides (R 0OOH). One way these species can be produced is via H atom abstraction reactions from alkanes (RH) by alkylperoxy radicals R0O 2 . An earlier study focussing on the abstraction from ethane by HO 2 , CH3O 2 and C2H5O 2 revealed that these reactions have a noticeable impact on ca...

Journal: :The Journal of chemical physics 2009
Tim Schäfer Jörg Lindner Peter Vöhringer Dirk Schwarzer

The population relaxation of the OD stretching vibration of HOD diluted in H(2)O is studied by time-resolved infrared pump-probe spectroscopy for temperatures between 278 and 663 K in the density range 0.281 OD stretching transition at low temperatures show a delay between excited state decay and formation of the therm...

2004
A. Belayachi

distribution of exchange interactions is due to the substitution between zinc and cadmium on tetrahedral sites. The samples in powder form were performed by the classical ceramic method. For the crystal growth, different methods were used depending on Zn and Cd concentrations. The composition was determined by X-ray measurements of the lattice constant. The direct current susceptibility measure...

1999
M. Disertori

Abstract This is a companion paper to [DR1]. Using the method of continuous renormalization group around the Fermi surface and the results of [DR1], we achieve the proof that a two-dimensional jellium system of interacting Fermions at low temperature T is a Fermi liquid above the BCS temperature Following [S1], this means proving analyticity in the coupling constant λ for |λ|| logT | ≤ K where ...

Journal: :Journal of the American Society for Mass Spectrometry 2004
Romulus Mihalca Anne J Kleinnijenhuis Liam A McDonnell Albert J R Heck Ron M A Heeren

Electron capture dissociation at 86 K of the linear peptide Substance P produced just two backbone fragments, whereas at room temperature eight backbone fragments were formed. Similarly, with the cyclic peptide gramicidin S, just one backbone fragment was formed at 86 K but five at room temperature. The observation that some backbone scissions are active and others inactive, when all involve NC...

2011
Lie Tang Todd E. Sparks Jianzhong Ruan Robert G. Landers Frank W. Liou

Melt pool temperature is of great importance to deposition quality in Laser Metal Deposition processes. To control the melt pool temperature, an empirical process model describing the relationship between the temperature and process parameters (i.e., laser power, powder flow rate, and traverse speed) is established and verified experimentally. A general tracking controller using the Internal Mo...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 0

a semi-empirical mathematical model for predicting physical part of ignition delay period in the combustion of direct - injection diesel engines with swirl is developed . this model based on a single droplet evaporation model . the governing equations , namely , equations of droplet motion , heat and mass transfer were solved simultaneously using a rung-kutta step by step unmerical method . the...

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