1,720,976 research outputs found
A new test for normality and independence
No full textIn this paper, a new test of normality and independence is proposed. This test is designed through a multivariate empirical characteristic by considering a result form [Ejsmont 2016]
Effectiveness of Teaching and the Transitions Between Schools
No full textChanging the place of residence of the student is undoubtedly related to the student's educational performance. Parents changing the place of residence also change the environment. The main purpose of this article is to examine the impact of a change of residence in the subsequent stages of learning on educational outcomes
Educational value added as a measure of the effectiveness of teaching in Polish secondary schools in terms of their location
No full textW artykule podjęto problem zróżnicowania wyników osiąganych przez uczniów w zależności od rodzaju miejscowości, w której urodził się uczeń. tzn. na wsi, w większych bądź mniejszych miastach. Analiza zostanie przeprowadzona na podstawie wyników uczniów kończących gimnazja w 2011 r. Poziom wiedzy zmierzono za pomocą wskaźnika edukacyjnej wartości dodanej.This paper undertakes the problem of differentiation of students performance according to the type location in which the student was born, i.e. in a village, in larger or smaller cities. The analysis is performed on the basis of the results the students achieved in secondary schools in 2011. The level of knowledge is measured by the ratio educational value added
Free Meixner distributions
No full textIn this paper the most important distributions in free probability (and maybe in the universe) will be presented. It is worth emphasizing that these distributions are not known among economists
Remarks on Wigner’s semicircle law
No full textEjsmont [2014] has shown that families of free Meixner distributions can be characterized by the conditional moments of polynomial functions of degree 3. In this paper, we will give other characterizations of the free normal distribution which are formulated in a similar spirit
Basic concepts of free probability theory
No full textFree probability theory was created by Dan Voiculescu, motivated by his efforts to understand special classes of von Neumann algebras. In the following we will give, mostly from the probability point of view, a survey on some of the basic ideas and results of free probability theory and show that in free probability theory, the role of Wigner’s semicircle distribution is analogous to that of the normal distribution in classical probability theory
Noncommutative probability of type D
Get PDFWe construct a deformed Fock space and a Brownian motion coming from Coxeter groups of type D. The construction is analogous to that of the q-Fock space (of type A) and the (alpha, q)-Fock space (of type B)
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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