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Comparison of some theoretical models for fittings of the temperature dependence of the fundamental energy gap in GaAs
Non-linear behavior of Eg(T) Zero-point energy Temperature dependence of the gap Gallium arsenide
2010/6/30
In this work we report on a comparison of some theoretical models usually used to fit the dependence on temperature of the fundamental energy gap of semiconductor materials. We used in our investigati...
A new approach for doing theoretical and numeric work with Lemaitre-Tolman-Bondi dust models
Lemaitre-Tolman-Bondi cosmic times
2010/3/17
We introduce quasi-local integral scalar variables for the study of spherically symmetric Lemaitre-Tolman-Bondi (LTB) dust models. Besides providing a covariant, and theoretically appealing, interpret...
The Theoretical Study of Si Core Levels for the Change of Oxidation State
Theoretical Si Core Levels the Change of Oxidation State
2010/9/17
The investigations of Si 1s and 2p photoelectron spectra of a poly-Si plate with natural oxide layers based on high energy excitation using X-ray tubes with three kinds of target (Mg Kα, Zr Lα and Ag ...
Swinging Atwood's Machine: Experimental and Theoretical Studies
Swinging Atwood Machine dynamic behaviour
2010/4/7
A Swinging Atwood Machine (SAM) is built and some experimental results concerning its dynamic behaviour are presented. Experiments clearly show that pulleys play a role in the motion of the pendulum, ...
A proposed U.S./China theoretical/experimental collaborative effort on baryon resonance extraction
baryon resonances electromagnetic form factors J/ψ production CEBAF Large Acceptance Spectrometer (CLAS) Jefferson Laboratory (JLab)
2009/11/17
In this paper we discuss the reasons for our work towards establishing a new collaboration between Jefferson Lab (JLab) and the Institute of High Energy Physics (IHEP) in Beijing. We seek to combine e...
A new theoretical paradigm to describe hysteresis,discrete memory and nonlinear elastic wave propagation in rock
new theoretical paradigm hysteresis discrete memory nonlinear elastic wave propagation
2009/11/16
The velocity of sound in rock is a strong function of pressure, indicating that wave propagation in rocks is very nonlinear. The quasistatic elastic properties of rocks axe hysteretic, possessing disc...
Theoretical Study on Sulfur Dioxide Absorption with Citrate Solution
citrate solution,absorption,sulfur dioxide, theoretical analysis
2009/11/13
The citrate absorption of SO2 is currently one of the most successful and economic methods to harness sulfur dioxide pollution. In order to theoretically elucidate the mechanism of SO2 absorption by c...
Permanent bedforms in a theoretical model of wave-sea-bed interactions
Permanent bedforms theoretical model wave-sea-bed interactions
2009/11/12
The interaction between sea waves and a deformable sea-bed is studied with a simple two-layer model in which the upper-layer fluid is inviscid and the lower-layer fluid is bi-viscous to account for no...
Granular flow in equilibrium with the bottom:experimental analysis and theoretical prediction
Granular flow in equilibrium experimental analysis theoretical prediction
2009/11/12
The paper presents measurements performed on the granular flow that develops in a drum partially filled with sand grains and rotating at various speeds. The aims of the paper are: to provide experimen...
Some theoretical models for solitary structures of boundary layer waves
Some theoretical models solitary structures boundary layer waves
2009/11/11
Solitary electrostatic structures have been observed in and around auroral zone field lines at various altitudes ranging from close to the ionosphere, to the magnetopause low-latitude boundary layer (...
Theoretical interpretation of fetch limited wind-drivensea observations
Theoretical interpretation fetch limited wind-drivensea observations
2009/11/11
We show that the results of major fetch limited field studies of wind-generated surface gravity waves on deep water can be explained in the framework of simple analytical model. The spectra measured i...
A theoretical model of a wake of a body towed in a stratified fluid at large Reynolds and Froude numbers
theoretical model stratified fluid large Reynolds Froude numbers
2009/11/9
The objective of the present paper is to develop a theoretical model describing the evolution of a turbulent wake behind a towed sphere in a stably stratified fluid at large Froude and Reynolds number...
Nonlinear instability and sensitivity of a theoretical grassland ecosystem to finite-amplitude perturbations
Nonlinear instability theoretical grassland ecosystem finite-amplitude perturbations
2009/11/3
Within a theoretical model context, the sensitivity and instability of the grassland ecosystem to finite-amplitude perturbations are studied. A new approach of conditional nonlinear optimal perturbati...
Synthesis of methyl (E)-2',4''-thiazachalcones and their N-alkyl derivatives, photochemistry with theoretical calculations and antimicrobial activities
Thiazachalcones N-decyl-4-thiazaclaconium bromide photodimerization antimicrobial activity
2010/4/8
A series of 9 new (E)-thiazachalcones (1-3), and their N-alkyl substituted derivatives (4-6), and stereoselective dimerization products (7-9) were synthesized, then tested for antimicrobial activity a...
On the Applicability of Theoretical Expressions for Flow Rate into Perforate Draintubes
Applicability of Theoretical Expressions Flow Rate Perforate Draintubes
2009/10/27
An assessment of the existing theoretical expressions of flow into perforated
draintubes has been made in regard to their applicability in the estimation of
flow rate into perforated drains under fi...