118,067 research outputs found
Qualitative Methoden und Sozialstrukturanalyse
No full textSchiek D, Behrmann L. Qualitative Methoden und Sozialstrukturanalyse. In: Böhnke P, Konietzka D, eds. Handbuch Sozialstrukturanalyse. Wiesbaden: Springer VS; 2025
Die neuen Gastarbeiter. Zur Bewertung von erwünschten Zuwanderern
No full textUlbricht C. Die neuen Gastarbeiter. Zur Bewertung von erwünschten Zuwanderern. In: Behrmann L, Eckert F, Gefken A, Berger PA, eds. Doing Inequality . Prozesse sozialer Ungleichheit im Blick qualitativer Sozialforschung. Sozialstrukturanlyse. Wiesbaden: Springer VS; 2018: 303-322
Qualitative Verfahren und die Untersuchung sozialer Benachteiligung
No full textSchiek D. Qualitative Verfahren und die Untersuchung sozialer Benachteiligung. In: Behrmann L, Eckert F, Gefken A, Berger PA, eds. Doing Inequality. Prozesse sozialer Ungleichheit im Blick qualitativer Sozialforschung. Sozialstrukturanalyse. Wiesbaden: Springer VS; 2018: 35-58
Vermittlungsstrategien zum Forschenden Lernen in der Lehrerbildung – Was nutzt der Nutzen?
No full textSchürer S, Bloh B, van Ophuysen S, Behrmann L. Vermittlungsstrategien zum Forschenden Lernen in der Lehrerbildung – Was nutzt der Nutzen? In: Krämer M, Preiser S, Brusdeylins K, eds. Psychologiedidaktik und Evaluation XII. Aachen: Shaker Verlag; 2018
Online self-powered Cr(VI) monitoring with autochthonous Pseudomonas and a bio-inspired redox polymer
No full textThe assessment of water quality is critical to implement preventive and emergency interventions aimed to limit/avoid environmental contamination and human exposure to toxic compounds. While established high-resolution techniques allow quantitative and qualitative determination of contaminants, their widespread application is not feasible due to cost, time, and need for trained personnel. In this context, the development of easy-to-implement approaches for preliminary detection of contaminants is of the utmost importance. Herein, a portable self-powered microbial electrochemical sensor enabling online monitoring of Cr(VI) is reported. The biosensor employs a bio-inspired redox mediating system to allow extracellular electron transfer between a bacterial isolate from chromium-contaminated environments and the electrode, providing a clear response to Cr(VI) presence. The biosensor shows good linearity (R2 = 0.983) and a limit of detection of 2.4 mg L−1 Cr(VI), with a sensitivity of 0.31 ± 0.02 μA cm−2 mgCr(VI)−1 L. The presented microbial bioanode architecture enhanced biosensor performance thanks to the improved “electrical wiring” between biological entities and the abiotic electrode surface. This approach could be easily implemented in engineered electrode surfaces, such as paper-based multi-anodes that maximize bacterial colonization, further improving biosensor response. [Figure not available: see fulltext.]
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Überlegungen zum Bildungsselbst Geringqualifizierter auf der Grundlage von Oevermanns Modell von Krise und Routine
No full textWolf E. Überlegungen zum Bildungsselbst Geringqualifizierter auf der Grundlage von Oevermanns Modell von Krise und Routine. In: Behrmann L, Eckert F, Gefken A, Berger PA, eds. Doing Inequality. Prozesse sozialer Ungleichheit im Blick qualitativer Sozialforschung. Sozialstrukturanalyse. Wiesbaden: Springer VS; 2017: 101-119
Square Dancing with the Stars to Enhance Dynamic Hirschman Linkages?
No full textIn this Presidential Address, the author takes the reader on a reconnaissance of his life and time as a regional scientist. He points out scenery he found scintillating along the way, hoping that some may pick up the banner and chew on a few of the ideas for a while. He suggests a revisit to Albert O. Hirschman’s notion of key sectors and more empirical analysis related to Marcus Berliant’s and Masahisa Fujita’s notion of knowledge creation and transfer.Presidential Address, San Antonio, Texas, March 29, 2014 (53rd Meetings of the Southern Regional Science Association
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe 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
Letter from unknown writer to Jesse L. Boyce
No full textLetter to Jesse L. Boyce from unknown author (possibly Jack) about the investigation into the powder magazine located in the Grand Canyon. Some personal news is included in the letter such as the writer's marriage to the daughter of C.A. Taylor, former Supervisor of Cochise County
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