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Occupation time theorems for one-dimensional random walks and diffusion processes in random environments
Kasahara, Yuji; Watanabe, Shinzo - In: Stochastic Processes and their Applications 119 (2009) 2, pp. 347-372
The long time asymptotics of the time spent on the positive side are discussed for one-dimensional diffusion processes in random environments. The limiting distributions under the log-log scale are obtained for the diffusion processes in the stable medium as well as for the Brox model. Similar...
Persistent link: https://www.econbiz.de/10008874502
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Critiquing Models of Emotions
Smith, Herman; Schneider, Andreas - In: Sociological Methods & Research 37 (2009) 4, pp. 560-589
primary emotions due to socialization. The Johnson-Laird and Oatley hypothesis of five universal clusters of emotions is also … as universal, primary, basic, secondary, tertiary, and so forth. There are clear empirical advantages to differentiating …
Persistent link: https://www.econbiz.de/10010789567
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The present status of battery technology
Scrosati, B. - In: Renewable Energy 5 (1994) 1, pp. 285-294
After a brief illustration of the hystory and of the characteristics of the most common primary and secondary batteries …
Persistent link: https://www.econbiz.de/10010806770
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The Parental Perspective over the Use of iPads in Primary and Middle Years of Schooling: Issues for Pedagogical and Policy Debates
Ismail, Abdullah; Cashin, Anthony - In: International Journal of Web-Based Learning and … 12 (2017) 3, pp. 34-46
Apple's iPad and other forms of tablet are reportedly gaining increasing popularity within the academic premises. Most of the published research on this topic has highly admired the positive role and impact of iPads on teaching and learning practices, as if an exogenous technological induction...
Persistent link: https://www.econbiz.de/10012048657
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Understand the three different scales for measuring primary energy and avoid errors
Lightfoot, H. Douglas - In: Energy 32 (2007) 8, pp. 1478-1483
Three quite different scales for measuring the amount of primary energy the world uses annually are currently in use … Intergovernmental Panel on Climate Change (IPCC), each has its own scale for measuring and recording primary energy. The purpose of this … primary energy. An example is presented to show how mixing of these scales, and not identifying them, constitutes an error in …
Persistent link: https://www.econbiz.de/10011055585
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Signed-rank tests for location in the symmetric independent component model
Nordhausen, Klaus; Oja, Hannu; Paindaveine, Davy - In: Journal of Multivariate Analysis 100 (2009) 5, pp. 821-834
The so-called independent component (IC) model states that the observed p-vectorX is generated via X=[Lambda]Z+[mu], where [mu] is a p-vector, [Lambda] is a full-rank matrix, and the centered random vector Z has independent marginals. We consider the problem of testing the null hypothesis on the...
Persistent link: https://www.econbiz.de/10005006423
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Monitoring parameter change in time series models
Gombay, Edit; Serban, Daniel - In: Journal of Multivariate Analysis 100 (2009) 4, pp. 715-725
Sequential tests that are generalizations of Page's CUSUM tests are proposed for detecting an abrupt change in any parameter, or in any collection of parameters of an autoregressive time series model. These tests accommodate nuisance parameters. They are based on large sample approximations to...
Persistent link: https://www.econbiz.de/10005006431
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Distribution of quadratic forms under skew normal settings
Wang, Tonghui; Li, Baokun; Gupta, Arjun K. - In: Journal of Multivariate Analysis 100 (2009) 3, pp. 533-545
For a class of multivariate skew normal distributions, the noncentral skew chi-square distribution is studied. The necessary and sufficient conditions under which a sequence of quadratic forms is generalized noncentral skew chi-square distributed random variables are obtained. Several examples...
Persistent link: https://www.econbiz.de/10005006440
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On the distribution of penalized maximum likelihood estimators: The LASSO, SCAD, and thresholding
Pötscher, Benedikt M.; Leeb, Hannes - In: Journal of Multivariate Analysis 100 (2009) 9, pp. 2065-2082
We study the distributions of the LASSO, SCAD, and thresholding estimators, in finite samples and in the large-sample limit. The asymptotic distributions are derived for both the case where the estimators are tuned to perform consistent model selection and for the case where the estimators are...
Persistent link: https://www.econbiz.de/10005006479
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Third-order power comparisons for a class of tests for multivariate linear hypothesis under general distributions
Kakizawa, Yoshihide - In: Journal of Multivariate Analysis 100 (2009) 3, pp. 473-496
The purpose of this paper is, in multivariate linear regression model (Part I) and GMANOVA model (Part II), to investigate the effect of nonnormality upon the nonnull distributions of some multivariate test statistics under normality. It is shown that whatever the underlying distributions, the...
Persistent link: https://www.econbiz.de/10005006528