1,723,605 research outputs found
Historische Migrationsforschung
No full textDie Geschichte des europäischen Kontinents ist auch eine Geschichte der Zu- und Abwanderung, der Verfolgung und Vertreibung sowie der gezielten Kolonisierung einzelner Landstriche. Sylvia Hahn gibt einen Überblick über unterschiedliche Ansätze der Migrationsforschung und deren Theorien und Methoden. Darüber hinaus stellt sie die Zusammenhänge zwischen sozialer und regionaler Herkunft der Migranten, ihren Erwerbstätigkeiten bzw. -möglichkeiten und Migrationswegen dar. Nicht zuletzt schildert sie anhand ausgewählter Beispiele vom Mittelalter bis heute auch Mechanismen des Ein- und Ausschlusses. Das Buch ist eine wichtige Grundlage für alle, die sich mit Migrationsgeschichte beschäftigen
Historische Migrationsforschung
No full textDie Geschichte des europäischen Kontinents ist auch eine Geschichte der Zu- und Abwanderung, der Verfolgung und Vertreibung sowie der gezielten Kolonisierung einzelner Landstriche. Sylvia Hahn gibt einen Überblick über unterschiedliche Ansätze der Migrationsforschung und deren Theorien und Methoden. Darüber hinaus stellt sie die Zusammenhänge zwischen sozialer und regionaler Herkunft der Migranten, ihren Erwerbstätigkeiten bzw. -möglichkeiten und Migrationswegen dar. Nicht zuletzt schildert sie anhand ausgewählter Beispiele vom Mittelalter bis heute auch Mechanismen des Ein- und Ausschlusses. Das Buch ist eine wichtige Grundlage für alle, die sich mit Migrationsgeschichte beschäftigen
A comparison of different synchronized permutation approaches to testing effects in two-level two-factor unbalanced ANOVA designs
No full textAnalysis of variance (ANOVA) is used to compare the means of various samples. Parametric ANOVA approaches assume normally distributed error terms within subsamples. Permutation tests like synchronized permutation tests are computationally intensive and distribution free procedures. Hence they overcome the limitationsofparametricmethods.Unbalanceddesignswithdifferingsubsamplesizes are quite frequent in various disciplines. There is a broad literature about unbalanced designs and parametric testing. For permutation tests this topic received some attentionrecently.Thispaperextendsthesynchronizedpermutationmethodtounbalanced two-level ANOVA designs. A simulation study investigates the behavior of different procedures for various types of unbalanced designs. It compares the results to other permutation approaches. The synchronized permutation method yields comparable results to the best performing competing permutation approaches. However the approach is limited to certain kinds of unbalanced designs
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
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Target-Specific Systemic Delivery of Bioengineered Mesenchymal Stem Cells for The Treatment of Liver Diseases
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