TY - GEN
AU - Markewitz, Friedrich
ED - Gansel, Christina
ED - Spieß, Constanze
ID - 33015
T2 - WSK Band 6 (Wörterbücher zur Sprach- und Kommunikationswissenschaft): Text- und Diskurslinguistik
TI - Archäologie
ER -
TY - GEN
AU - Markewitz, Friedrich
ED - Gansel, Christina
ED - Spieß, Constanze
ID - 33017
T2 - Fachtextsorte
TI - Fachtextsorte
VL - 6
ER -
TY - GEN
AU - Markewitz, Friedrich
ED - Gansel, Christina
ED - Spieß, Constanze
ID - 33018
T2 - WSK Band 6 (Wörterbücher zur Sprach- und Kommunikationswissenschaft): Text- und Diskurslinguistik
TI - Gebrauchstextsorte
VL - 6
ER -
TY - JOUR
AU - Gries, Thomas
AU - Redlin, Margarete
ID - 17086
JF - International Economics and Economic Policy
SN - 1612-4804
TI - Trade and economic development: global causality and development- and openness-related heterogeneity
VL - 17
ER -
TY - CHAP
AU - van Ackeren, Isabell
AU - Buhl, Heike M.
AU - Eickelmann, Birgit
AU - Heinrich, Martin
AU - Wolfswinkler, Günther
ED - Kaspar, Kai
ED - Becker-Mrotzek, Michael
ED - Hofhues, Sandra
ED - König, Johannes
ED - Schmeinck, Daniela
ID - 32555
T2 - Bildung, Schule und Digitalisierung
TI - Digitalisierung in der Lehrerbildung durch Communities of Practice. Konzeption, Governance und Qualitätsmanagement des ComeIn-Verbundvorhabens in Nordrhein-Westfalen
ER -
TY - JOUR
AB - This investigation concentrates on value similarity between parents and their children during adulthood. The interplay between gender, age, relationship quality, and frequency of contact on value similarity was analyzed. A total of 600 adult German children (53.8% women) and their parents took part in a questionnaire study. Value orientation was measured with a short version of Schwartz’s Portrait Values Questionnaire, and relationship quality with the Network of Relationships Inventory (Furman & Buhrmeister, 1992).Value similarity was higher in mother–daughter dyads compared to mother–son dyads, but in the other dyads, no significant differences were found. Regarding relationship quality, verbal intimacy was not related to value similarity. Parental satisfaction was associated with value similarity in the father–child dyads. Satisfaction, as perceived by adult children, was linked to value similarity in mother–child and father–son dyads. Furthermore, the frequency of contact related to value similarity between mothers and sons.
AU - Hoellger, Christian
AU - Sommer, Sabrina
AU - Albert, Isabelle
AU - Buhl, Heike M.
ID - 32559
IS - 6
JF - Journal of Family Issues
KW - Adult child–parent dyads
KW - value similarity
KW - relationship quality
KW - frequency of contact
KW - parent-child-relationship
SN - 0192-513X
TI - Intergenerational Value Similarity in Adulthood
VL - 42
ER -
TY - BOOK
ED - Öhlschläger, Claudia
ID - 32894
TI - Urbane Kulturen und Räume intermedial. Zur Lesbarkeit der Stadt in interdisziplinärer Perspektive
ER -
TY - CONF
AU - Buckmann, Felix
AU - Kenig, Eugeny
ID - 24214
TI - On the experimental study of condensation in pillow plate heat exchangers
ER -
TY - JOUR
AB - The increasingly simulation-driven design process of ultrasonic transducers requires several reliable parameters for the description of the material behaviour. Exact results can only be achieved when a single specimen is used in the identification process, which typically is prone to the problem of low sensitivities to certain material parameters and thus high uncertainties. Therefore, a custom electrode topology for increased sensitivity is proposed for a piezoceramic disc. The thereupon conducted measurements of the electric impedance can be used as a starting point for an inverse approach where an equivalent simulation model is used to identify fitting material parameters. An optimisation strategy based on a preliminary sensitivity analysis is presented that leads to a good agreement between measurement and simulation. Furthermore, the proposed measurement procedure is able to evaluate the quality of the simulation model. Hence, different frequency-dependent damping models are presented and evaluated.
AU - Feldmann, Nadine
AU - Schulze, Veronika
AU - Claes, Leander
AU - Jurgelucks, Benjamin
AU - Walther, Andrea
AU - Henning, Bernd
ID - 19313
JF - tm - Technisches Messen
SN - 2196-7113
TI - Inverse piezoelectric material parameter characterization using a single disc-shaped specimen
ER -
TY - GEN
AB - Dieses Lernangebot widmet sich der linearen Algebra als dem Teil der Mathematik, der neben der Optimierung und der Stochastik die Grundlage für praktisch alle Entwicklungen im Bereich Künstliche Intelligenz (KI) darstellt. Das Fach ist jedoch für Anfänger meist ungewohnt abstrakt und wird daher oft als besonders schwierig und unanschaulich empfunden. In diesem Kurs wird das Erlernen mathematischer Kenntnisse in linearer Algebra verknüpft mit dem aktuellen und faszinierenden Anwendungsfeld der künstlichen neuronalen Netze (KNN). Daraus ergeben sich in natürlicher Weise Anwendungsbeispiele, an denen die wesentlichen Konzepte der linearen Algebra erklärt werden können.
Behandelte Themen sind:
Der Vektorraum der reellen Zahlentupel, reelle Vektorräume allgemein
Lineare Abbildungen
Matrizen
Koordinaten und darstellende Matrizen
Lineare Gleichungssysteme, Gaußalgorithmus
Determinante
Ein Ausblick auf nichtlineare Techniken, die für neuronale Netzwerke relevant sind.
AU - Schramm, Thomas
AU - Gasser, Ingenuin
AU - Schwenker, Sören
AU - Seiler, Ruedi
AU - Lohse, Alexander
AU - Zobel, Kay
ID - 33273
TI - Linear Algebra driven by Data Science
ER -
TY - GEN
AU - Nijholt, Eddie
AU - Rink, Bob
AU - Schwenker, Sören
ID - 33272
IS - April
T2 - DSWeb
TI - Generalised Symmetry in Network Dynamics
ER -
TY - JOUR
AB - The authors of Berg et al. [J. Algebra 348 (2011) 446–461] provide an algorithm for finding a complete system of primitive orthogonal idempotents for CM, where M is any finite R-trivial monoid. Their method relies on a technical result stating that R-trivial monoid are equivalent to so-called weakly ordered monoids. We provide an alternative algorithm, based only on the simple observation that an R-trivial monoid may be realized by upper triangular matrices. This approach is inspired by results in the field of coupled cell network dynamical systems, where L-trivial monoids (the opposite notion) correspond to so-called feed-forward networks. We first show that our algorithm works for ZM, after which we prove that it also works for RM where R is an arbitrary ring with a known complete system of primitive orthogonal idempotents. In particular, our algorithm works if R is any field. In this respect our result constitutes a considerable generalization of the results in Berg et al. [J. Algebra 348 (2011) 446–461]. Moreover, the system of idempotents for RM is obtained from the one our algorithm yields for ZM in a straightforward manner. In other words, for any finite R-trivial monoid M our algorithm only has to be performed for ZM, after which a system of idempotents follows for any ring with a given system of idempotents.
AU - Nijholt, Eddie
AU - Rink, Bob
AU - Schwenker, Sören
ID - 33262
IS - 12
JF - Journal of Algebra and Its Applications
KW - Applied Mathematics
KW - Algebra and Number Theory
SN - 0219-4988
TI - A new algorithm for computing idempotents of ℛ-trivial monoids
VL - 20
ER -
TY - JOUR
AB - Dynamical systems often admit geometric properties that must be taken into account when studying their behavior. We show that many such properties can be encoded by means of quiver representations. These properties include classical symmetry, hidden symmetry, and feedforward structure, as well as subnetwork and quotient relations in network dynamical systems. A quiver equivariant dynamical system consists of a collection of dynamical systems with maps between them that send solutions to solutions. We prove that such quiver structures are preserved under Lyapunov--Schmidt reduction, center manifold reduction, and normal form reduction.
AU - Nijholt, Eddie
AU - Rink, Bob W.
AU - Schwenker, Sören
ID - 33263
IS - 4
JF - SIAM Journal on Applied Dynamical Systems
KW - Modeling and Simulation
KW - Analysis
SN - 1536-0040
TI - Quiver Representations and Dimension Reduction in Dynamical Systems
VL - 19
ER -
TY - JOUR
AB - We derive a criterium for the almost sure finiteness of perpetual integrals of L ́evy
processes for a class of real functions including all continuous functions and for general one-
dimensional L ́evy processes that drifts to plus infinity. This generalizes previous work of D ̈oring
and Kyprianou, who considered L ́evy processes having a local time, leaving the general case as an
open problem. It turns out, that the criterium in the general situation simplifies significantly in
the situation, where the process has a local time, but we also demonstrate that in general our cri-
terium can not be reduced. This answers an open problem posed in D ̈oring, L. and Kyprianou, A.
(2015).
AU - Kolb, Martin
AU - Savov, Mladen
ID - 33282
IS - 2
JF - Bernoulli
KW - L ́evy processes
KW - Perpetual integrals
KW - Potential measures
TI - A Characterization of the Finiteness of Perpetual Integrals of Levy Processes
VL - 26
ER -
TY - CHAP
AU - Markewitz, Friedrich
ED - Ozil, Seyda
ED - Hofman, Michae
ED - Laut, Jens Peter
ED - Dayioglu-Yücel, Yasemin
ED - Zierau, Cornela
ED - Uca, Didem
ID - 32726
T2 - Türkisch-Deutsche Studien Jahrbuch 2019:Migration movements and right-wing populism after 2015
TI - Wahrheit, Freiheit, Demokratie – Zum Umgang mit Hochwertausdrücken in rechtspopulistischen bzw. neurechten Argumentationen anhand des Blogs „Politically Incorrect“
ER -
TY - JOUR
AB - Reciprocal relations are binary relations Q with entries Q(i,j)∈[0,1], and such that Q(i,j)+Q(j,i)=1. Relations of this kind occur quite naturally in various domains, such as preference modeling and preference learning. For example, Q(i,j) could be the fraction of voters in a population who prefer candidate i to candidate j. In the literature, various attempts have been made at generalizing the notion of transitivity to reciprocal relations. In this paper, we compare three important frameworks of generalized transitivity: g-stochastic transitivity, T-transitivity, and cycle-transitivity. To this end, we introduce E-transitivity as an even more general notion. We also use this framework to extend an existing hierarchy of different types of transitivity. As an illustration, we study transitivity properties of probabilities of pairwise preferences, which are induced as marginals of an underlying probability distribution on rankings (strict total orders) of a set of alternatives. In particular, we analyze the interesting case of the so-called Babington Smith model, a parametric family of distributions of that kind.
AU - Haddenhorst, Björn
AU - Hüllermeier, Eyke
AU - Kolb, Martin
ID - 33330
IS - 2
JF - International Journal of Approximate Reasoning
TI - Generalized transitivity: A systematic comparison of concepts with an application to preferences in the Babington Smith model
VL - 119
ER -
TY - CHAP
AU - Berisha-Gawlowski, Angelina
AU - Caruso, Carina
AU - Goller, Michael
AU - Harteis, Christian
ED - Heisler, Dietmar
ED - Meier, Jörg
ID - 26678
T2 - Digitalisierung und Berufsbildung 4.0 am Übergang Schule - Beruf
TI - Auswirkungen der Digitalisierung industrieller Arbeit auf die allgemeine und berufliche Bildung
ER -
TY - GEN
AU - Steinhardt, Isabel
AU - Fischer, Caroline
AU - Heimstädt, Maximilian
AU - Hirsbrunner, Simon David
AU - Ikiz-Akinci, Dilek
AU - Kressin, Lisa
AU - Kretzer, Susanne
AU - Möllenkamp, Andreas
AU - Portzelt, Maike
AU - Rahal, Rima-Maria
AU - Schimmler, Sonja
AU - Wilke, René
AU - Wünsche, Hannes
ID - 29257
TI - Das Öffnen und Teilen von Daten qualitativer Forschung: eine Handreichung
VL - 6
ER -
TY - JOUR
AB - Openness in science and education is increasing in importance within the digital knowledge society. So far, less attention has been paid to teaching Open Science in bachelor’s degrees or in qualitative methods. Therefore, the aim of this article is to use a seminar example to explore what Open Science practices can be taught in qualitative research and how digital tools can be involved. The seminar focused on the following practices: Open data practices, the practice of using the free and open source tool “Collaborative online Interpretation, the practice of participating, cooperating, collaborating and contributing through participatory technologies and in social (based) networks. To learn Open Science practices, the students were involved in a qualitative research project about “Use of digital technologies for the study and habitus of students”. The study shows the practices of Open Data are easy to teach, whereas the use of free and open source tools and participatory technologies for collaboration, participation, cooperation and contribution is more difficult. In addition, a cultural shift would have to take place within German universities to promote Open Science practices in general.
AU - Steinhardt, Isabel
ID - 29246
IS - 3
JF - Education for Information
KW - Open Science
KW - Open Education Practices
KW - Library and Information Sciences
KW - Education
KW - Information Systems
SN - 0167-8329
TI - Learning Open Science by doing Open Science. A reflection of a qualitative research project-based seminar
VL - 36
ER -
TY - JOUR
AB - Abstract
Purpose
While observational studies revealed inverse associations between serum vitamin D levels [25(OH)D] and depression, randomized controlled trials (RCT) in children and adolescents are lacking. This RCT examined the effect of an untreated vitamin D deficiency compared to an immediate vitamin D3 supplementation on depression scores in children and adolescents during standard day and in-patient psychiatric treatment.
Methods
Patients with vitamin D deficiency [25(OH)D ≤ 30 nmol/l] and at least mild depression [Beck Depression Inventory II (BDI-II) > 13] (n = 113) were 1:1 randomized into verum (VG; 2640 IU vitamin D3/d) or placebo group (PG) in a double-blind manner. During the intervention period of 28 days, both groups additionally received treatment as usual. BDI-II scores were assessed as primary outcome, DISYPS-II (Diagnostic System for Mental Disorders in Childhood and Adolescence, Self- and Parent Rating) and serum total 25(OH)D were secondary outcomes.
Results
At admission, 49.3% of the screened patients (n = 280) had vitamin D deficiency. Although the intervention led to a higher increase of 25(OH)D levels in the VG than in the PG (treatment difference: + 14 ng/ml; 95% CI 4.86–23.77; p = 0.003), the change in BDI-II scores did not differ (+ 1.3; 95% CI − 2.22 to 4.81; p = 0.466). In contrast, DISYPS parental ratings revealed pronounced improvements of depressive symptoms in the VG (− 0.68; 95% CI − 1.23 to − 0.13; p = 0.016).
Conclusion
Whereas this study failed to show a vitamin D supplementation effect on self-rated depression in adolescent in- or daycare patients, parents reported less depressive symptoms in VG at the end of our study. Future trials should consider clinician-rated depressive symptoms as primary outcome.
Trial registration
“German Clinical Trials Register” (https://www.drks.de), registration number: DRKS00009758
AU - Libuda, Lars
AU - Timmesfeld, Nina
AU - Antel, Jochen
AU - Hirtz, Raphael
AU - Bauer, Jens
AU - Führer, Dagmar
AU - Zwanziger, Denise
AU - Öztürk, Dana
AU - Langenbach, Gina
AU - Hahn, Denise
AU - Ring, Stefanie
AU - Peters, Triinu
AU - Hinney, Anke
AU - Bühlmeier, Judith
AU - Hebebrand, Johannes
AU - Grasemann, Corinna
AU - Föcker, Manuel
ID - 27022
JF - European Journal of Nutrition
SN - 1436-6207
TI - Effect of vitamin D deficiency on depressive symptoms in child and adolescent psychiatric patients: results of a randomized controlled trial
ER -