scholarly journals An experimental criterion for consistency in interpolation of partly occluded contours

10.1167/9.4.5 ◽  
2009 ◽  
Vol 9 (4) ◽  
pp. 5-5 ◽  
Author(s):  
J. M. Fulvio ◽  
M. Singh ◽  
L. T. Maloney
Keyword(s):  
Experimental Criterion

Transposition of Probability Matching in Pigeons

1965 ◽  
Vol 16 (1) ◽  
pp. 115-118
Author(s):  
W. F. Angermeier ◽  
J. Higgins ◽  
D. Locke
Keyword(s):  
Discrimination Problem ◽  
Probability Matching ◽  
Reinforcement Probability ◽  
Matching Response ◽  
Experimental Criterion

Four pigeons were trained to match reinforcement probability of two discs illumined with different degrees of brightness. After Ss had reached the prescribed experimental criterion, the dimmer of the two discs was now made the brighter of the two. In this way, transposition of the probability matching response was investigated. All animals showed this transposition. It was concluded that the probability matching response in pigeons was a fairly stable response, and that it could be transposed to other levels of discrimination, especially when degrees of brightness were used as the discrimination problem.

Regrowth of Amorphized Compound Semiconductors

1985 ◽  
Vol 45 ◽  
Author(s):  
W.G. Opyd ◽  
J.F. Gibbons
Keyword(s):  
Rutherford Backscattering Spectrometry ◽  
Boltzmann Transport Equation ◽  
Compound Semiconductors ◽  
Liquid Nitrogen Temperature ◽  
Electrical Activation ◽  
Boltzmann Transport ◽  
Epitaxial Regrowth ◽  
Transmission Electron ◽  
Experimental Criterion ◽  
Implant Modeling

ABSTRACTEpitaxial regrowth is investigated for layers of InSb and GaAs amorphized by liquid nitrogen temperature ion implants. Experimental criterion for amorphization and limitation of regrowth are correlated with damage calculated by a Boltzmann transport equation approach to ion implant modeling. Conditions for complete epitaxial regrowth as determined by channeled Rutherford backscattering spectrometry are presented with evaluation of residual defects by transmission electron microscopy. Electrical activation following regrowth of GaAs is reported and correlated with calculated damage profiles.

A Whistling Criterion for Two Orifices in Series

2009 ◽  
Author(s):  
Romain Lacombe ◽  
Yves Aure´gan ◽  
Pierre Moussou
Keyword(s):  
Pressure Drop ◽  
Power Plants ◽  
Acoustic Power ◽  
Scattering Matrix ◽  
In Series ◽  
Inner Diameter ◽  
Acoustic Amplifier ◽  
Experimental Criterion

Whistling phenomena in pipe power plants have been observed in the past years. It occurs at pressure drop devices where vortex shedding is established. It generates high noise levels and excessive vibrations. Aure´gan and Starobinsky [1] have developed an experimental criterion to predict whistling frequencies of pressure drop devices submitted to plane propagating pressure waves. This criterion estimates the net acoustic power, an acoustic exergy generation indicating that the device behaves as an acoustic amplifier. The corresponding frequencies are potential whistling frequencies. The application of the criterion only requires the determination of the scattering matrix of the device. In previous works, this criterion was applied to different single hole orifices. The purpose of the present study is to apply the criterion to two orifices in series and to verify that the behavior of this system can be predicted from the scattering matrix of each individual orifice and of the straight pipe in-between. Measurements are done on an air test rig with an inner diameter of 3 cm, a Mach number of 2.6 × 10−2 and a Reynolds number of 104. Different distances between orifices are characterized. The study of the influence of the second orifice on the whistling criterion shows an enhancement of the whistling potential and a shift of the main potential whistling frequency. A fair agreement is found between experimental and predicted results. Characterization of orifices in series is then possible from the coefficients of the scattering matrix of one orifice and an appropriate condition on the distance between the orifices.

scholarly journals The thermal decomposition of diethyl ether

1939 ◽  
Vol 171 (944) ◽  
pp. 39-54 ◽  
Keyword(s):  
Thermal Decomposition ◽  
Diethyl Ether ◽  
Initial Pressure ◽  
Activation Process ◽  
Chain Reactions ◽  
First Order ◽  
History Of ◽  
A Chain ◽  
Considerable Range ◽  
Experimental Criterion

The thermal decomposition of diethyl ether has played a part in the history of first order reactions. The experimental criterion of such reactions is that the time of half change is nearly independent of the initial pressure over a considerable range, although the activation process is ultimately bimolecular. As is well known, the first order law may be followed even when the primary act is followed by chain reactions (Christiansen and Kramers 1923; Rice and Herzfeld 1934). The ether decomposition is partly a chain reaction (Staveley and Hinshelwood 1936; Fletcher and Rollefson 1936). Enough results of theoretical interest have emerged from its study to render desirable the clearing up of various uncertainties by fuller investigation and repetition with more accurate methods of some of the previous work.

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