scholarly journals Estimation of noise radiation including airborne noise using the in-situ blocked force approach (Proposal of an approximate method and its verification using a simple model)

2018 ◽  
Vol 84 (865) ◽  
pp. 18-00049-18-00049 ◽  
Author(s):  
Yoshihiro SATO ◽  
Nobuyuki IWATSUKI
Keyword(s):  
Simple Model ◽  
Approximate Method ◽  
Noise Radiation ◽  
Airborne Noise

scholarly journals Flow fields associated with in situ mineral leaching

1994 ◽  
Vol 36 (2) ◽  
pp. 133-151 ◽  
Author(s):  
Lawrence K. Forbes ◽  
Anthony M. Watts ◽  
Graeme A. Chandler
Keyword(s):  
Simple Model ◽  
Free Boundary ◽  
Numerical Method ◽  
Flow Rate ◽  
Recovery Rate ◽  
Flow Fields ◽  
Vertical Line ◽  
Rate Limiting ◽  
Mineral Leaching

AbstractA simple model for underground mineral leaching is considered, in which liquor is injected into the rock at one point and retrieved from the rock by being pumped out at another point. In its passage through the rock, the liquor dissolves some of the ore of interest, and this is therefore recovered in solution. When the injection and recovery points lie on a vertical line, the region of wetted rock forms an axi-symmetric plume, the surface of which is a free boundary. We present an accurate numerical method for the solution of the problem, and obtain estimates for the maximum possible recovery rate of the liquor, as a fraction of the injected flow rate. Limiting cases are discussed, and other geometries for fluid recovery are considered.

GROWTH OF OXIDE LAYER ON GERMANIUM (011) SUBSTRATE UNDER DRY AND WET ATMOSPHERES

1999 ◽  
Vol 06 (06) ◽  
pp. 1053-1060 ◽  
Author(s):  
N. TABET ◽  
J. AL-SADAH ◽  
M. SALIM
Keyword(s):  
Simple Model ◽  
Oxide Film ◽  
Growth Kinetics ◽  
Photoelectron Spectroscopy ◽  
Early Stage ◽  
X Ray ◽  
Apparent Thickness ◽  
Different Temperatures ◽  
Kinetics Of

X-ray Photoelectron Spectroscopy (XPS) has been used to investigate the oxidation of (011) Ge substrates. The sample surfaces were CP4-etched, then annealed in situ, at different temperatures, for various durations. Dry and wet atmospheres were used. The oxidation rate during the early stage was increased by the presence of moisture in the atmosphere. A simple model was used to define and determine an apparent thickness of the oxide film from XPS measurements. The time dependence of the apparent thickness is consistent with a partial coverage of the surface by oxide islands. The growth kinetics of the oxide islands obeys a nearly cubic law.

Uv Excimer Laser-Induced Deposition of Palladium from Palladium Acetate Films

1989 ◽  
Vol 158 ◽  
Author(s):  
Hilmar Esrom ◽  
Georg Wahl
Keyword(s):  
Simple Model ◽  
Aluminum Oxide ◽  
Excimer Laser ◽  
Pulse Energy ◽  
Laser Pulses ◽  
Palladium Acetate ◽  
Induced Decomposition ◽  
Quartz Substrates ◽  
Exposure Process

ABSTRACTUV excimer laser-induced deposition of palladium from spin coated palladium acetate films in air is described. We have investigated mainly the deposition of palladium on aluminum oxide and quartz substrates and its dependence on the fluence and the number of excimer laser pulses. The decomposition mechanism was studied by measuring in situ the transmitted pulse energy during the exposure process. We have found that the excimer laser-induced decomposition of palladium acetate films is mainly pyrolytic and a simple model can be used to describe the decomposition process.

SHORT-PERIOD OSCILLATIONS OF THE MAGNETIC COUPLING OF EPITAXIAL GROWN Fe/Mo/Fe SANDWICHES ON Mo(100)

1992 ◽  
Vol 06 (14) ◽  
pp. 839-849 ◽  
Author(s):  
Z. Q. QIU ◽  
J. PEARSON ◽  
S. D. BADER
Keyword(s):  
Simple Model ◽  
Electron Diffraction ◽  
Hysteresis Loop ◽  
Kerr Effect ◽  
Exchange Coupling ◽  
Magnetic Coupling ◽  
Oscillatory Behavior ◽  
Ferromagnetic Coupling ◽  
Short Period

Epitaxial Fe / Mo / Fe sandwiches grown onto a Mo (100) single crystal were characterized in situ by electron diffraction and the magneto-optic Kerr effect. The intervening Mo layer is wedge shaped to facilitate the study of the magnetic coupling between the two (14-monolayer thick) Fe films as a function of Mo thickness. The exchange coupling between the Fe films across Mo was found to exhibit oscillatory behavior between antiferromagnetic (AF) and ferromagnetic coupling with a periodicity of ~3 ML of Mo . The shape of the hysteresis loop of the AF-coupled samples was calculated from a simple model that reproduces most of the experimental features.

Structure of Momolayers of Silicotungstate Anions on Ag(111) and Au(111) Electrode Surfaces

1996 ◽  
Vol 451 ◽  
Author(s):  
Maohui Ge ◽  
Brian K. Niece ◽  
Craig G. Wall ◽  
Walter G. Klemperer ◽  
Andrew A. Gewirth
Keyword(s):  
Simple Model ◽  
Van Der Waals ◽  
Electrode Surfaces ◽  
Stm Images ◽  
Van Der Waals Contacts

ABSTRACTα-Dodecatungstosilicate (α-SiW12O404−) anions form ordered monolayers on Ag(111) and Au(111) surfaces. In-situ STM images reveal that the silicotungstate ion forms a square adlattice with an intermolecule spacing of 10.2 ± 0.5 Å on both Ag and Au surfaces. Additional structures exhibiting either row or rhombic motifs are observed on Au electrodes. The structure of the adlattices can be modeled using a simple model which maximizes the coordination of the silicotungstate ion to the electrode while maintaining van der Waals contacts between terminal oxygens of adjacent silicotungstates.

scholarly journals Time until fixation of a mutant belonging to a multigene family

1983 ◽  
Vol 41 (1) ◽  
pp. 47-55 ◽  
Author(s):  
Tomoko Ohta
Keyword(s):  
Population Genetics ◽  
Monte Carlo ◽  
Simple Model ◽  
Genetic Variability ◽  
Approximate Method ◽  
Multigene Family ◽  
Multigene Families ◽  
Random Drift ◽  
Closely Related Species ◽  
Constant Gene

SUMMARYTime until fixation of a mutant that occurs in one copy of a multigene family was investigated from the standpoint of population genetics. Because of the complexity of the double process of random drift (on the chromosome and in the population), an approximate method based on the rate of steady decay of genetic variability is applied. The simple model of gene conversion with constant gene family size is also used. The expectation based on the approximate method is shown to be valid by extensive Monte Carlo simulations, and the results are useful for understanding the mechanisms of turnover of multigene families, when comparison is available between closely related species.

An Approach for the Synthesis of Oil Hydraulic Transmission Line Dynamics Utilizing in situ Measurements

1996 ◽  
Vol 210 (2) ◽  
pp. 77-93 ◽  
Author(s):  
J Watton ◽  
C J Hawkley
Keyword(s):  
Time Series ◽  
Simple Model ◽  
Time Series Analysis ◽  
Transmission Line ◽  
Operating Conditions ◽  
Fluid Power ◽  
Model Structure ◽  
Transient Pressure ◽  
Analysis Technique

An approach is developed utilizing measurements of transient pressure and flowrate at the inlet and outlet of the line. A time series analysis technique is used in such a way that the number of unknown coefficients to be estimated is minimized. Accurate predictions are shown for three different line configurations and a range of operating conditions. The evaluation of just two transmission line functions then allows a simple model structure to be used for the simulation of fluid power circuits incorporating long lines.

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