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OPEN FAU

Online publication system of Friedrich-Alexander-Universität Erlangen-Nürnberg

The online publication system OPEN FAU is the central publication platform for Open Access publishing for all members of Friedrich-Alexander-Universität. Qualified works from research and teaching may be published here free of charge, either as a primary or secondary publication. The full texts are permanently available worldwide and are findable and citable via catalogues and search engines.


To search for documents in OPEN FAU, please select "Search" (via the magnifying glass at the top right); this will provide you with various search options. If you want to publish a document, go to "Login" and "My Publications". Then drag you document into the field provided and enter the metadata. In just a few steps, you can submit your document. Please note our guidelines, the publication contract and FAQs.

 

Recent Submissions

Book
Open Access
First validation of the Computerized Cognitive Test Battery (CCTB) on the Short Cognitive Performance Test (SKT) and the Montreal Cognitive Assessment (MoCA) in terms of convergent and divergent validity in individuals aged 60 years and older
(2024-05-14) Graessel, Elmar; Jank, Michael; Greiner, Sarah; Stemmler, Mark
Background: Validity is considered to be the primary quality criterion of a test instrument. This work aims to conduct a first validation study in terms of convergent and divergent validity on the test parameters of the Computerized Cognitive Test Battery (CCTB), which measures memory, concentration in connection with processing speed and logical reasoning in 8 subtests. Methods: The investigation was carried out in the form of a cross-sectional study. The Short Cognitive Performance Test (SKT) and the Montreal Cognitive Assessment (MoCA) were used as validation instruments. The main hypothesis was that the individual tests of the CCTB, depending on their conceptual focus, show moderate to strong correlation with the SKT score, its subtests, and the MoCA score. A total of 51 subjects participated in the study, 24 of whom came into contact with the CCTB for the first time, while the remaining 27 had already been able to learn how to use the CCTB within a randomized-controlled trial on cognitive training programs. Bivariate correlation analyses were conducted to test the hypotheses on convergent and divergent validity. Additionally, correlation coefficients and exploratory factor analysis were used for exploratory analyses. Results: Most correlations of the CCTB tests showed a moderate to strong positive correlation with the test parameters for convergent validity. With regard to divergent validity, the hypotheses were for the most part be confirmed. The explorative factor analysis revealed a two-factorial structure of the CCTB subtests with the dimensions memory and information processing speed. Conclusion: The results support the convergent validity of the CCTB compared with SKT and MoCA.
Article
Open Access
Molekulardynamische Untersuchung von Zerkleinerungsprozessen in Kugelmühlen
(Vogel Business Media, 2000) Buchholtz, Volkhard; Freund, Jan Alfred; Pöschel, Thorsten
Molekulardynamische Untersuchungen eignen sich zur Simulation des Verhaltens makroskopischer Mengen granularen Materials unter bestimmten, technologisch relevanten Beanspruchungen. Wir untersuchen das Zerkleinerungsverhalten von Mahlgut in einer Kugelmühle, insbesondere im Hinblick auf die Effizienz als Funktion der Drehzahl und auf die räumliche Verteilung von Beanspruchungen. Die Untersuchung der Verteilung von Kraflketten (force chains) liefert eine Erklärung des Experiments von Rothkegel und Rolf [3].
Book part
Open Access
Die Kühlrate eines granularen Gases
(Köster, 1996) Schwager, Thomas; Pöschel, Thorsten; Freund, Jan Alfred
Book part
Open Access
A measure of the information content of neural spike trains
(DIRAC, 1997) Jiménez-Montaño, Miguel Angel; Pöschel, Thorsten; Rapp, Paul; Mizraji, Eduardo; Acerenza, Luis; Alvarez, Fabián; Pomi, Andrés
Conference object
Open Access
From “solid” to “fluid”: Time-dependent hydrodynamic analysis of dense granular flows
(Kluwer Academic Press, 2001-09-30) Salueña, Clara; Pöschel, Thorsten; Esipov, Sergei E.; Aref, Hassan; Phillips, James W.
When dealing with dense granular flows (not far above the ''fluidization point'' of the granular material), which cannot be regarded as granular gases, multiple unresolved questions arise. Many of them are related to the necessity of constructing the right framework to handle the dynamics of void occupation, which governs granular flow at high densities. This is a formidable task. However, hydrodynamic fields such as density, velocity, pressure and granular temperature, are easy to produce and study in numerical simulations of particles.