Non-Gaussian scaling limits. Hierarchical model approximation

1984 ◽  
Vol 35 (3-4) ◽  
pp. 267-284 ◽  
Author(s):  
K. Gawedzki ◽  
A. Kupiainen
Keyword(s):  
Hierarchical Model ◽  
Scaling Limits ◽  
Model Approximation ◽  
Non Gaussian

Non-Gaussian Diffusion of Phosphorus and Arsenic in Silicon with Local Density Diffusivity Model

2010 ◽  
Vol 303-304 ◽  
pp. 21-29 ◽  
Author(s):  
Frank Wirbeleit
Keyword(s):  
Local Density ◽  
Host Lattice ◽  
Model Approximation ◽  
Near Surface ◽  
Impurity Species ◽  
Surface Enhanced ◽  
Non Gaussian ◽  
The Given ◽  
Diffusion Flows ◽  
Diffusion Profiles

In the light of published phosphorus and arsenic diffusion profiles [1,2] a non-Gaussian mathematical diffusion model is developed in this work based on separate forward and reflected impurity diffusion flows and called local density diffusion (LDD) model. The LDD model includes the rational function diffusion (RFD) model published in [3] and represents an improvement for near surface and tail concentration profile slope approximation by introducing just one single empirical fit parameter “r”. This single fit parameter is related to the given combination of impurity species (phosphorus: r=0.18; arsenic: r=0.43) in the applied host lattice system (silicon), but does not vary while approximating different experiments with different impurity surface concentrations and penetration depths [1,2]. Based on the LDD approximation in this work a surface enhanced diffusivity for phosphorus and a tail decelerated diffusion for arsenic is suggested in comparison to RFD model approximation only. The local density diffusivity is found to be non-linear along the penetration path and reaches its maximum at a distance LLDD from the surface.

Influence of General and Crystallized Intelligence on Vocabulary Test Performance

2002 ◽  
Vol 18 (1) ◽  
pp. 78-84 ◽  
Author(s):  
Eva Ullstadius ◽  
Jan-Eric Gustafsson ◽  
Berit Carlstedt
Keyword(s):  
Hierarchical Model ◽  
Test Performance ◽  
Verbal Ability ◽  
Testing Procedure ◽  
Intellectual Ability ◽  
Analysis Of Covariance ◽  
Categorical Variables ◽  
Vocabulary Test ◽  
Crystallized Intelligence ◽  
General Ability

Summary: Vocabulary tests, part of most test batteries of general intellectual ability, measure both verbal and general ability. Newly developed techniques for confirmatory factor analysis of dichotomous variables make it possible to analyze the influence of different abilities on the performance on each item. In the testing procedure of the Computerized Swedish Enlistment test battery, eight different subtests of a new vocabulary test were given randomly to subsamples of a representative sample of 18-year-old male conscripts (N = 9001). Three central dimensions of a hierarchical model of intellectual abilities, general (G), verbal (Gc'), and spatial ability (Gv') were estimated under different assumptions of the nature of the data. In addition to an ordinary analysis of covariance matrices, assuming linearity of relations, the item variables were treated as categorical variables in the Mplus program. All eight subtests fit the hierarchical model, and the items were found to load about equally on G and Gc'. The results also indicate that if nonlinearity is not taken into account, the G loadings for the easy items are underestimated. These items, moreover, appear to be better measures of G than the difficult ones. The practical utility of the outcome for item selection and the theoretical implications for the question of the origin of verbal ability are discussed.

Masked Translation Priming Effects With Highly Proficient Simultaneous Bilinguals

2010 ◽  
Vol 57 (2) ◽  
pp. 98-107 ◽  
Author(s):  
Jon Andoni Duñabeitia ◽  
Manuel Perea ◽  
Manuel Carreiras
Keyword(s):  
Lexical Decision ◽  
Hierarchical Model ◽  
Priming Effect ◽  
Masked Priming ◽  
The Other ◽  
Memory Organization ◽  
Priming Effects ◽  
Bilingual Memory ◽  
Translation Priming ◽  
Masked Translation Priming

One essential issue for models of bilingual memory organization is to what degree the representation from one of the languages is shared with the other language. In this study, we examine whether there is a symmetrical translation priming effect with highly proficient, simultaneous bilinguals. We conducted a masked priming lexical decision experiment with cognate and noncognate translation equivalents. Results showed a significant masked translation priming effect for both cognates and noncognates, with a greater priming effect for cognates. Furthermore, the magnitude of the translation priming was similar in the two directions. Thus, highly fluent bilinguals do develop symmetrical between-language links, as predicted by the Revised Hierarchical model and the BIA+ model. We examine the implications of these results for models of bilingual memory.

Heterosexual men's attitudes toward gay men: A hierarchical model including masculinity, openness, and theoretical explanations.

2008 ◽  
Vol 9 (3) ◽  
pp. 154-166 ◽  
Author(s):  
Joseph M. Barron ◽  
Cindy Struckman-Johnson ◽  
Randal Quevillon ◽  
Sarah R. Banka
Keyword(s):  
Gay Men ◽  
Hierarchical Model

A hierarchical model of team climate in an extreme environment

2003 ◽  
Author(s):  
Lacey L. Schmidt ◽  
JoAnna Wood ◽  
Peter Sullivan
Keyword(s):  
Hierarchical Model ◽  
Extreme Environment ◽  
Team Climate

An investigation of a hierarchical model of personality and diet behavior

2004 ◽  
Author(s):  
Tim Bogg ◽  
Dustin Wood ◽  
Michelle Webb ◽  
Brent Roberts
Keyword(s):  
Hierarchical Model ◽  
Diet Behavior
Sign in / Sign up

Export Citation Format

Share Document