scholarly journals Statistical Analysis of Critical Load Excitations Induced on a Random Cable System by an Incident Driving Field: Basic Concepts and Methodology

Author(s):  
M. A. Morgan ◽  
F. M. Tesche
2010 ◽  
Vol 30 (3) ◽  
pp. 474-479 ◽  
Author(s):  
Peter Schlattmann ◽  
Ulrich Dirnagl

Part one of this mini-series on statistics in cerebrovascular research uses the simplest yet most common comparison in experimental research (two groups with a continuous outcome variable) to introduce the very basic concepts of statistical testing: a priori formulation of hypotheses and definition of planned statistical analysis, error considerations, and power analysis.


Author(s):  
Georgios P. Karagiannis

AbstractWe present basic concepts of Bayesian statistical inference. We briefly introduce the Bayesian paradigm. We present the conjugate priors; a computational convenient way to quantify prior information for tractable Bayesian statistical analysis. We present tools for parametric and predictive inference, and particularly the design of point estimators, credible sets, and hypothesis tests. These concepts are presented in running examples. Supplementary material is available from GitHub.


2021 ◽  
Vol 14 (4) ◽  
pp. 136-153
Author(s):  
V. A. Silaeva

Even though IR literature has accumulated a large amount of empirical data and knowledge in sanctions policy effectiveness, this problem remains contested: IR has failed yet to reach a consensus and elaborate the sanctions theory. The article reviews the variety of approaches to evaluating the effectiveness of the sanctions policy and explains why researchers have come to conflicting and mutually exclusive conclusions about the impact of various factors and conditions on the outcome of sanctions pressure. It argues that the disagreement is primarily rooted in different approaches to conceptualizing basic concepts – “sanctions” and “effectiveness”. This disagreement results in coding the same cases as successful and unsuccessful and presents an obstacle to obtaining similar results using statistical analysis. The main demarcation line goes between the realist and liberal understandings of sanctions as a foreign policy tool. This is reflected in the ongoing disputes between those who adhere to the idea of inflicting severe economic damage on the target country and supporters of targeted sanctions; between those who promote multilateral sanctions as capable of causing economic effects, or try to identify weaknesses of ad hoc coalitions, or see the only way to get the effect of sanctions in support from international organizations; between those who focus their research on the target country and those who are interested in pressure on the allies.


2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Supardi U.S. Supardi ◽  
Leonard Leonard ◽  
Huri Suhendri ◽  
Rismurdiyati Rismurdiyati

<p>The research objective is to obtain an appropriate media and learning physics can help understanding the basic concepts in physics learning, especially for the completion of a straight motion of matter in the junior class VII. The study design used in this study is a 2x2 factorial design with three variables, namely instructional media, interest in student learning, and learning outcomes Physics. The samples obtained through the Multi Stage Sampling, each 13 person for 4 classes, so that individual large sample size of 52 students. Data analysis using ANOVA of two lines techniques, and first performed a descriptive statistical analysis and test analysis requirements. The results showed that: 1) there is the differences of learning outcomes of students who were taught physics learning media fascination with physics and conventional instructional media, 2) there is the differences of learning outcomes of students who are interested in studying physics of high and low learning interest, and 3) there is an interaction effect of <br />learning media and interest in learning the results of learning Physics. <br /><br /></p>


1966 ◽  
Vol 24 ◽  
pp. 188-189
Author(s):  
T. J. Deeming

If we make a set of measurements, such as narrow-band or multicolour photo-electric measurements, which are designed to improve a scheme of classification, and in particular if they are designed to extend the number of dimensions of classification, i.e. the number of classification parameters, then some important problems of analytical procedure arise. First, it is important not to reproduce the errors of the classification scheme which we are trying to improve. Second, when trying to extend the number of dimensions of classification we have little or nothing with which to test the validity of the new parameters.Problems similar to these have occurred in other areas of scientific research (notably psychology and education) and the branch of Statistics called Multivariate Analysis has been developed to deal with them. The techniques of this subject are largely unknown to astronomers, but, if carefully applied, they should at the very least ensure that the astronomer gets the maximum amount of information out of his data and does not waste his time looking for information which is not there. More optimistically, these techniques are potentially capable of indicating the number of classification parameters necessary and giving specific formulas for computing them, as well as pinpointing those particular measurements which are most crucial for determining the classification parameters.


Author(s):  
Gianluigi Botton ◽  
Gilles L'espérance

As interest for parallel EELS spectrum imaging grows in laboratories equipped with commercial spectrometers, different approaches were used in recent years by a few research groups in the development of the technique of spectrum imaging as reported in the literature. Either by controlling, with a personal computer both the microsope and the spectrometer or using more powerful workstations interfaced to conventional multichannel analysers with commercially available programs to control the microscope and the spectrometer, spectrum images can now be obtained. Work on the limits of the technique, in terms of the quantitative performance was reported, however, by the present author where a systematic study of artifacts detection limits, statistical errors as a function of desired spatial resolution and range of chemical elements to be studied in a map was carried out The aim of the present paper is to show an application of quantitative parallel EELS spectrum imaging where statistical analysis is performed at each pixel and interpretation is carried out using criteria established from the statistical analysis and variations in composition are analyzed with the help of information retreived from t/γ maps so that artifacts are avoided.


1977 ◽  
Vol 8 (1) ◽  
pp. 23-32
Author(s):  
Gerald E. Chappell

Test-teach questioning is a strategy that can be used to help children develop basic concepts. It fosters the use of multisensory exploration and discovery in learning which leads to the development of cognitive-linguistic skills. This article outlines some of the theoretical bases for this approach and indicates possibilities for their applications in child-clinician transactions.


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