TY  - JOUR
A1  - Michel, Eva
A1  - Söll, Lena
A1  - Molitor, Sabine
T1  - Die Rolle elternbeurteilter exekutiver Funktionen zur Schulleistungsprognose
JF  - Lernen und Lernstörungen
N2  - Einleitung: Unter dem Begriff exekutive Funktionen (EF) werden häufig die Komponenten Inhibition, kognitive Flexibilität und Aktualisierung von Arbeitsgedächtnisrepräsentationen subsumiert. EF sind bereichsübergreifende Prädiktoren schulischer Leistungen. Verschiedene Operationalisierungen derselben Komponente, z.B. Performanztests und Elterneinschätzungen, zeigen häufig nur geringe Interkorrelationen. Die Methoden scheinen unterschiedliche Aspekte einer Komponente zu erfassen, daher könnte eine Kombination zur Vorhersage schulischer Leistungen sinnvoll sein. Methode: N = 96 Erst- und Zweitklässler_innen mit und ohne Entwicklungsauffälligkeiten wurden mittels EF-Performanztests und Schulleistungstests zu Mathematik und Lesen untersucht. Per Fragebogen wurden elternbeurteilte EF und als Kontrollvariablen der sozioökonomische Status (SÖS) und das Vorliegen von Merkmalen einer Aufmerksamkeitsdefizit-Hyperaktivitätsstörung (ADHS) erfasst. Ergebnisse: Elternbeurteilungen hatten über die Performanztests hinaus einen bedeutsamen Vorhersagewert für die Mathematik- und Leseleistung. Der Einfluss von Alter, SÖS und ADHS-Merkmalen wurde kontrolliert. Diskussion: Die kombinierte Anwendung beider Erfassungsmethoden scheint somit vorteilhaft für die Prognose schulischer Leistungen und die Prävention von Schulleistungsproblemen.
N2  - Introduction: The term „executive functions“ (EF) often embraces inhibition, cognitive flexibility and working memory updating. EF are domain-general predictors of scholastic performance. Different operationalisations of the same component, e.g., individual tests and parent ratings, often show weak interrelations. This indicates that different methods measure different aspects of an EF component. A combination of operationalisation methods might thus enhance the prediction of school performance. Method: N = 96 1st and 2nd graders with typical/atypical development were tested with individual EF tests, as well as mathematics and reading tests. Parent-rated EF, socio-economic status (SES) and ADHD symptoms (as control variables) were assessed with a questionnaire. Results: Parent ratings improve the prediction of mathematics and reading performance over and above individual tests. Age, SES and ADHD symptoms were controlled. Discussion: Combining both EF operationalisations provides benefits for prognosis and prevention of scholastic achievement problems.
T2  - The Role of Parent-Rated Executive Functions as Predictors of School Performance
KW  - Exekutive Funktionen
KW  - Prädiktoren von Schulleistungen
KW  - ADHS
KW  - Mathematik
KW  - Lesen
KW  - Executive functions
KW  - predictors of scholastic performance
KW  - ADHD
KW  - mathematics
KW  - reading
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-231575
SN  - 2235-0977
SN  - 2235-0985
VL  - 11
IS  - 1
ER  - 
TY  - JOUR
A1  - Harrach, Bastian
T1  - Recent Progress on the Factorization Method for Electrical Impedance Tomography
JF  - Computational and Mathematical Methods in Medicine
N2  - The Factorization Method is a noniterative method to detect the shape and position of conductivity anomalies inside an object. The method was introduced by Kirsch for inverse scattering problems and extended to electrical impedance tomography (EIT) by Brühl and Hanke. Since these pioneering works, substantial progress has been made on the theoretical foundations of the method. The necessary assumptions have been weakened, and the proofs have been considerably simplified. In this work, we aim to summarize this progress and present a state-of-the-art formulation of the Factorization Method for EIT with continuous data. In particular, we formulate the method for general piecewise analytic conductivities and give short and self-contained proofs.
KW  - Mathematik
Y1  - 2013
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-96229
ER  - 
TY  - JOUR
A1  - Ferrante, Augusto
A1  - Wimmer, Harald K.
T1  - Reachability matrices and cyclic matrices
N2  - We study reachability matrices R(A, b) = [b,Ab, . . . ,An−1b], where A is an n × n matrix over a field K and b is in Kn. We characterize those matrices that are reachability matrices for some pair (A, b). In the case of a cyclic matrix A and an n-vector of indeterminates x, we derive a factorization of the polynomial det(R(A, x)).
KW  - Mathematik
KW  - Reachability matrix
KW  - Krylow matrix
KW  - cyclic matrix
KW  - nonderogatory matrix
KW  - companion matrix
KW  - Vandermonde matrix
KW  - Hautus test
Y1  - 2010
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-68074
N1  - AMS subject classifications. 15A03, 15A15, 93B05
ER  - 
TY  - JOUR
A1  - Ballester-Bolinches, A.
A1  - Beidleman, J. C.
A1  - Heineken, H.
A1  - Pedraza-Aguilera, M. C.
T1  - Local Classes and Pairwise Mutually Permutable Products of Finite Groups
N2  - The main aim of the paper is to present some results about products of pairwise mutually permutable subgroups and local classes.
KW  - Mathematik
KW  - mutually permutable
KW  - local classes
KW  - p-soluble groups
KW  - p-supersolubility
KW  - finite groups
Y1  - 2010
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-68062
ER  -