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Dissertations / Theses on the topic 'Exner'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 March 2023

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1

Sebald, Andrea Elisabeth. "Der Kriminalbiologe Franz Exner (1881 - 1947) ; Gratwanderung eines Wissenschaftlers durch die Zeit des Nationalsozialismus." Frankfurt, M. Berlin Bern Bruxelles New York, NY Oxford Wien Lang, 2008. http://d-nb.info/990483649/04.

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2

Exner, Thomas [Verfasser]. "Sozialadäquanz im Strafrecht. : Zur Knabenbeschneidung. / Thomas Exner." Berlin : Duncker & Humblot, 2011. http://d-nb.info/1238424937/34.

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3

Streek, André Verfasser], Eckhard [Akademischer Betreuer] Beyer, and Horst [Gutachter] [Exner. "Lasermikrosintern / André Streek ; Gutachter: Horst Exner ; Betreuer: Eckhard Beyer." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://d-nb.info/1150310065/34.

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4

Streek, André [Verfasser], Eckhard Akademischer Betreuer] Beyer, and Horst [Gutachter] [Exner. "Lasermikrosintern / André Streek ; Gutachter: Horst Exner ; Betreuer: Eckhard Beyer." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://d-nb.info/1150310065/34.

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5

Hansmeier, Jana [Verfasser], and Cornelia [Akademischer Betreuer] Exner. "Die Bedeutung von Metakognitionen bei Zwangsstörungen / Jana Hansmeier. Betreuer: Cornelia Exner." Marburg : Philipps-Universität Marburg, 2015. http://d-nb.info/1074639596/34.

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6

Koch, Julia [Verfasser], and Cornelia [Akademischer Betreuer] Exner. "Kognitive Selbstaufmerksamkeit und neuropsychologische Leistungsdefizite bei Zwangserkrankungen / Julia Koch. Betreuer: Cornelia Exner." Marburg : Philipps-Universität Marburg, 2013. http://d-nb.info/1032314524/34.

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7

Exner, Alexander [Verfasser]. "Untersuchung selbstorganisierter kolloidaler Polyisopren-block-polyethylenoxid-copolymer Kristalle und Quasikristalle / Alexander Exner." München : Verlag Dr. Hut, 2015. http://d-nb.info/1079768327/34.

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8

Exner, Gianna [Verfasser], and Markus [Akademischer Betreuer] Kipp. "Abhängigkeit der Cuprizone-Toxizität von der Applikationsform / Gianna Exner ; Betreuer: Markus Kipp." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2021. http://d-nb.info/1234389045/34.

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9

Exner, Samantha [Verfasser]. "G protein-coupled peptide receptors as molecular targets in neuroendocrine tumors / Samantha Exner." Berlin : Freie Universität Berlin, 2018. http://d-nb.info/1196805199/34.

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10

McGrow, Anja [Verfasser], Norbert [Akademischer Betreuer] Kathmann, Edgar [Akademischer Betreuer] Geissner, and Cornelia [Akademischer Betreuer] Exner. "Prozedurales Lernen bei Zwangsstörungen / Anja McGrow. Gutachter: Norbert Kathmann ; Edgar Geissner ; Cornelia Exner." Berlin : Humboldt Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät II, 2011. http://d-nb.info/1015016715/34.

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11

CARRARO, Francesco. "de Saint Venant-Exner morphological models: computational methods for long-term numerical modelling." Doctoral thesis, Università degli studi di Ferrara, 2018. http://hdl.handle.net/11392/2487844.

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Morphodynamic models are used to predict river and nearshore evolution describing the interactions between sediments and water flow. Due to the importance of many engineering applications requiring morphodynamic predictions, great attention has been devoted to the development of more efficient numerical techniques. Morphodynamics combines two processes: the faster hydrodynamic evolution and the slower sediment-dynamics. When the sediment transport is much slower than the hydrodynamic evolution (i.e. the Froude number of the water flow is far from the unity), the interaction between water flow and bed response is very weak. From an analytical study of the one-dimensional, non-conservative, de Saint Venant-Exner (dSVE) system of equations result that, under this condition, the morphodynamic evolution depends almost on the central wave of the associated Riemann problem. According to this theoretical study, this doctoral dissertation is focused on the increasing of the numerical efficiency of morphological models. First a new efficient implementation of the Dumbser-Osher-Toro (DOT) scheme for non-conservative problems is presented. The DOT path-conservative scheme is a robust upwind method based on a complete Riemann solver, but with the drawback of requiring expensive numerical computations. Indeed, to compute the non-linear time evolution in each time step, the DOT scheme requires numerical computation of the flux matrix eigenstructure (the totality of eigenvalues and eigenvectors) several times at each cell edge. In this research, an analytical and compact formulation of the eigenstructure for the dSVE model is introduced and tested in terms of numerical efficiency and stability. Second a general mathematical framework is built to study the acceleration of morphodynamic simulations. Thus, a non-uniform acceleration is applied to the one-dimensional dSVE model by multiplying all the spatial derivatives by an individual constant (>1) acceleration factor. In this framework, one of the most applied morphological acceleration techniques, the MORFAC approach, can be seen as a particular case of the non-uniform acceleration. According to the MORFAC approach only the sediment mass continuity equation is accelerated. The final goal of the non-uniform acceleration is to identify the best combination of the three accelerating factors. Such a combination must respect two points: i) the bed responds linearly to hydrodynamic changes; ii) a consistent decrease of the computational cost is obtained. An analytical investigation of the non-uniform accelerated problem allows derivation of a new linear morphodynamic acceleration technique, MASSPEED (MASs equations SPEEDup), in which both mass conservation equations (water and sediment) are accelerated by the same factor. Moreover, the new framework allows an \textit{a priori} determination of the highest possible acceleration for both MORFAC and MASSPEED techniques. Finally, MORFAC and MASSPEED are implemented in the A-DOT numerical scheme and numerical simulations of a long-term sediment hump propagation demonstrate the advantages of the new approach.
I modelli morfodinamici vengono utilizzati per prevedere l'evoluzione temporale del fondo dei fiumi e dei fondali vicini alla costa descrivendo le interazioni tra i sedimenti ed il flusso dell'acqua. Per l'importanza di molte applicazioni ingegneristiche che richiedono previsioni morfodinamiche, grande attenzione è stata posta allo sviluppo di metodi numerici sempre più efficienti. La morfodinamica combina due processi: la veloce evoluzione idrodinamica e e la lenta dinamica dei sedimenti. Quando il trasporto dei sedimenti è molto più lento dell'evoluzione idrodinamica (cioè il numero di Froude della corrente idraulica è lontano da valori unitari), l'interazione tra il moto dell'acqua e la risposta del fondo è molto debole. Quando si verificano queste condizioni, uno studio analitico del sistema di equazioni de Saint Venant-Exner (dSVE), monodimensionale e non conservativo, mostra che l'evoluzione morfodinamica dipende principalmente dall'onda centrale del problema di Riemann associato al sistema di equazioni. Partendo da questo studio, questa tesi di dottorato si concentra sull'utilizzo di questa particolare caratteristica per migliorare l'efficienza computazionale dei modelli morfologici. Per prima cosa è presentata un nuovo e più efficiente metodo d'implementazione del Dumbser-Osher-Toro (DOT) solutore di Riemann per problemi non conservativi. Il DOT è un solutore numerico molto robusto ma poco efficiente. E' basato sullo schema path-conservativo e fa un uso completo delle componenti del problema di Riemann associato al problema. Perciò, per il calcolo non lineare dell'evoluzione temporale del problema, richiede, ad ogni passo temporale e ad ogni interfaccia tra celle di calcolo, il calcolo completo dell'autosistema (l'insieme di autovettori e autovalori) della matrice dei flussi associata al problema. In questo studio il calcolo numerico dell'autosistema associato al modello matematico dSVE viene sostituito da una formulazione analitica e compatta, approfonditamente testata in termini di efficienza e stabilità. In secondo luogo è stata definita una formulazione matematica generale per lo studio dell'accelerazione matematica dell'evoluzione morfodinamica. Così è stata testata un'accelerazione non uniforme dei flussi relativi alle tre equazioni che compongono il sistema di dSVE, grazie all'inserimento di tre coefficienti di accelerazione (>1) che moltiplicano le derivate spaziali che compaiono rispettivamente nelle tre equazioni. Tramite questa generalizzazione una delle tecniche più utilizzate per accelerare l'evoluzione morfodinamica, il MORFAC, può essere visto come un caso particolare dell'accelerazione non uniforme. Ovvero, se si applica il MORFAC, solo le derivate spaziali della portata di sedimenti andrebbero incrementate. L'obiettivo della generalizzazione è invece cercare di capire se esiste una configurazione ottimale dei tre coefficienti di accelerazione. Tale configurazione deve rispettare due condizioni fondamentali: i) il fondo deve reagire linearmente (nel tempo) all'azione dell'idrodinamica; ii) deve prodursi il più consistente possibile risparmio computazionale. Tale combinazione è stata cercata tramite uno studio analitico del sistema accelerato ed è sfociata nella definizione di una nuova tecnica denominata MASSPEED (MASs equations SPEEDup), secondo la quale è necessario accelerare della stessa quantità entrambe le equazioni di continuità del sistema (dell'acqua e dei sedimenti). La nuova generalizzazione del problema permette inoltre di determinare a priori il massimo valore di accelerazione possibile per entrambi i due metodi studiati (MORFAC e MASSPEED). Infine, implementando questi due metodi nel modello numerico sviluppato in precedenza, per mostrare i vantaggi di questo nuovo approccio è stato effettuato un test di evoluzione a lungo termine di una duna fluviale.

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12

Garrido-Lecca, Magally. "Self-esteem in adolescents with low academic achievement assessed with the Rorschach Inkblots." Pontificia Universidad Católica del Perú, 2013. http://repositorio.pucp.edu.pe/index/handle/123456789/101083.

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The objective of the study was to determine if there were differences in the self-esteem of adolescents with low academic achievement as compared ro those with an average or high achievement. The participants were 60 adolescents, aged 13 to 16, of both sexes and with an average or high IQ . Thirty presented a low school achievement (study group) and 30 had a good achievement (contrast group). The WISC-R was administered to determine the IQ and the Rorschach lnkblots, using the CS uf Exner, to assess the self-esteem. The results showed that the Rorschach is a good instrument tu assess self-esteem. Likewise, there are significant differences in the self-esteem uf adolescents with low achievement due to emotional deficits, as compared to those with high achievement.
El objetivo fue determinar si existen diferencias en la autoestima de adolescentes con bajo rendimiento escolar comparados con los de un rendimiento promedio o superior. Los participantes fueron 60 adolescentes, entre 13 y 16 años, de ambos sexos, con un C.I. promedio o superior al promedio, de los cuales 30 presentaban un bajo rendimiento escolar (grupo de estudio) y 30 un buen rendimiento (grupo contraste). Se administró el WISCR para determinar el C.I. y el Rorschach según el SC de Exner para evaluar la autoestima. Los resultados mostraron que el Rorschach es adecuado para evaluar la autoestima. Asimismo existe una diferencia significativa en la autoestima de adolescentes con bajo rendimiento como resultado de sus déficits afectivos, en comparación con los de alto rendimiento.

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13

Künemund, Anna [Verfasser], and Cornelia [Akademischer Betreuer] Exner. "Akkommodative Selbstregulation nach erworbenen Hirnschädigungen: Lebensziele, persönliche Reifung und Ereigniszentralität / Anna Künemund. Betreuer: Cornelia Exner." Marburg : Philipps-Universität Marburg, 2016. http://d-nb.info/1097535029/34.

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14

Exner, Jörg [Verfasser]. "Aerosolbasierte Kaltabscheidung von Funktionskeramiken für neuartige Anwendungen im Bereich der Sensorik und Energiewandlung / Jörg Exner." Aachen : Shaker, 2019. http://d-nb.info/1188550918/34.

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15

Exner, Willi Verfasser], Uwe [Akademischer Betreuer] [Motschmann, and Sven [Akademischer Betreuer] Simon. "Modeling of Mercury's Magnetosphere Under Different Solar Wind Conditions / Willi Exner ; Uwe Motschmann, Sven Simon." Braunschweig : Technische Universität Braunschweig, 2021. http://d-nb.info/1232912654/34.

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16

Exner, Armin Theodor Verfasser], Paolo [Akademischer Betreuer] [Lugli, and Bettina [Akademischer Betreuer] Lotsch. "Hybrid Organic, Inorganic Optical Sensors / Armin Theodor Exner. Gutachter: Bettina Lotsch ; Paolo Lugli. Betreuer: Paolo Lugli." München : Universitätsbibliothek der TU München, 2014. http://d-nb.info/1050238761/34.

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17

Exner-Oliaß, Christine [Verfasser]. "Korrelation serologischer Parameter mit der histologischen Struktur im Verlauf der Frakturheilung im Schafmodell / Christine Exner-Oliaß." Berlin : Freie Universität Berlin, 2010. http://d-nb.info/1028493991/34.

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18

Exner, Maik [Verfasser], and Thorsten [Akademischer Betreuer] Steinfeldt. "Histologische Veränderungen in peripheren Nerven nach Injektion eines Lokalanästhetikums im Tiermodell / Maik Exner. Betreuer: Thorsten Steinfeldt." Marburg : Philipps-Universität Marburg, 2014. http://d-nb.info/1051935407/34.

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19

Exner, Sebastian [Verfasser]. "Ganzkörperbestrahlung im Rahmen der Konditionierung vor Stammzelltransplantation bei Kindern mit Leukämien : Nebenwirkungen und Langzeitergebnisse / Sebastian Exner." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2018. http://d-nb.info/1153768852/34.

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20

Obando, Vallejos Benjamín Alonso. "Estudio matemático de ondas de sedimento y modelación matemática de un reómetro de paletas." Tesis, Universidad de Chile, 2013. http://www.repositorio.uchile.cl/handle/2250/114011.

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Ingeniero Civil Matemático
Este trabajo consta de 2 capítulos. El primer capítulo trata sobre el estudio de ondas de sedimento en el transporte hidráulico de sólidos en tubería (THST). El primer objetivo de este capítulo es estudiar la solución clásica de la ecuación hiperbólica de Exner o de conservación de sedimento 1-d para una canaleta rectangular con la hipótesis de Exner sobre el gasto sólido. La solución clásica de esta ecuación esta dada por una ecuación implícita, sin embargo, es posible encontrar la solución para la condición inicial de una onda sinusoidal. Con esta información se descarta la solución clásica ya que no es físicamente posible. Posteriormente se desarrolla un algoritmo que nos permite encontrar la solución débil del problema y verificar que esta solución si corresponde a un fenomeno físicamente posible. El segundo objetivo de este capitulo es levantar la hipótesis de Exner y formular un modelo más realista para el gasto sólido en el caso de la canaleta rectangular y de la tubería utilizando el modelo de Meyer-Peter y Muller y encontrar las soluciones débiles respectivas. Para encontrar la solución débil del problema con la hipótesis de Exner y el problema con el modelo de Meyer-Peter y Muller para el gasto sólido en una canaleta rectangular y la tubería se desarrollo un algoritmo numérico basado en el método de Galerkin discontinuo con límite de salto y se utilizo MATLAB para su desarrollo. Se utilizaron los datos de las mediciones experimentales de Coleman y García para validar el modelo para la canaleta rectangular. Esto se hace comparando las velocidades que alcanzan las ondas de sedimento simuladas con los modelos numéricos con las experimentales obteniendo resultados satisfactorios. El segundo capítulo de este trabajo es sobre la modelación de un reómetro de paletas.El primer objetivo de este capítulo es plantear las ecuaciones de Cauchy para un fluido Newtoniano y un fluido Bingham en un sistema de referencia no inercial que es solidario a las paletas. Un segundo objetivo es desarrollar un algoritmo que resuelva las ecuaciones y obtener una expresión para el Torque aplicado sobre las paletas en terminos de la geometría y la solución de las ecuaciones de Cauchy. Para esto se desarrollaron algoritmos basados en un método de punto fijo en el caso Newtoniano que transforma el problema no lineal en una sucesión de problemas lineales. En el caso Bingham se utilizo un método de tipo Uzawa que mediante equivalencias de problemas es posible reducir él problema no lineal a una sucesión de problemas lineales y utilizando un algoritmo alternante se resuelve el problema numéricamente. Para el desarrollo de estos algoritmos se utilizó Matlab.

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21

Schulze, Diana [Verfasser], Ludger A. [Akademischer Betreuer] Wessjohann, and T. E. [Akademischer Betreuer] Exner. "Die Diphosphataktivierung in Proteinen : Betrachtungen aus verschiedenen Blickwinkeln / Diana Schulze. Betreuer: Ludger A. Wessjohann ; T. E. Exner." Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2011. http://d-nb.info/1025202546/34.

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22

Tennstedt, Stephanie [Verfasser], L. A. [Akademischer Betreuer] Wessjohann, and T. [Akademischer Betreuer] Exner. "In-silicio-Identifizierung und Untersuchung von Agonisten und Antagonisten des Androgenrezeptors / Stephanie Tennstedt. Betreuer: L. A. Wessjohann ; T. Exner." Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2011. http://d-nb.info/1025135962/34.

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23

Schüller-Exner, Sabine [Verfasser], Heiko [Akademischer Betreuer] Wunderlich, Hermann M. [Akademischer Betreuer] Behre, and Jürgen [Akademischer Betreuer] Weiß. "Funktionelle Spermatozoenparameter und ihre Relevanz im ART-Labor / Sabine Schüller-Exner. Gutachter: Heiko Wunderlich ; Hermann M. Behre ; Jürgen Weiß." Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2011. http://d-nb.info/1016620047/34.

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24

Klein, Robert [Verfasser], Ludger [Akademischer Betreuer] Wessjohann, and Thomas E. [Akademischer Betreuer] Exner. "Modellierung von Prenyltransferasen und Terpensynthasen und Untersuchungen zum molekularen Docking von Reaktionsintermediaten / Robert Klein. Betreuer: Ludger Wessjohann ; Thomas E. Exner." Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2014. http://d-nb.info/1058360515/34.

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25

Exner, Lisanne Christin [Verfasser]. "Bedeutung der Insulinrezeptor-ß-subunit für die Tumorbiologie des muskelinfiltrierenden Harnblasenkarzinoms vor dem Hintergrund Diabetes-assoziierter Stoffwechselalterationen / Lisanne Christin Exner." Tübingen : Universitätsbibliothek Tübingen, 2021. http://d-nb.info/1234450909/34.

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26

Schober, Fabian Alexander [Verfasser], Frank [Akademischer Betreuer] Berger, Andreas [Akademischer Betreuer] Küchler, and Wolfgang [Akademischer Betreuer] Exner. "Elektrische Leitfähigkeit und dielektrisches Verhalten von Pressspan in HGÜ-Isoliersystemen / Fabian Alexander Schober. Betreuer: Frank Berger. Gutachter: Andreas Küchler ; Wolfgang Exner." Ilmenau : Universitätsbibliothek Ilmenau, 2016. http://d-nb.info/1095904108/34.

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Schober, Fabian [Verfasser], Frank [Akademischer Betreuer] Berger, Andreas [Akademischer Betreuer] Küchler, and Wolfgang [Akademischer Betreuer] Exner. "Elektrische Leitfähigkeit und dielektrisches Verhalten von Pressspan in HGÜ-Isoliersystemen / Fabian Alexander Schober. Betreuer: Frank Berger. Gutachter: Andreas Küchler ; Wolfgang Exner." Ilmenau : Universitätsbibliothek Ilmenau, 2016. http://nbn-resolving.de/urn:nbn:de:gbv:ilm1-2016000076.

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28

Merz, Christina [Verfasser], Ulrich [Akademischer Betreuer] Hegerl, Maria [Akademischer Betreuer] Strauß, Cornelia [Gutachter] Exner, and Peter [Gutachter] Schönknecht. "Die Geschwindigkeit des Depressionsbeginns bei unipolarer und bipolarer affektiver Störung / Christina Merz ; Gutachter: Cornelia Exner, Peter Schönknecht ; Ulrich Hegerl, Maria Strauß." Leipzig : Universitätsbibliothek Leipzig, 2014. http://d-nb.info/1238601677/34.

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29

Lorenz, Doris [Verfasser], and Franklin [Akademischer Betreuer] Kopitzsch. "145 Jahre „EXNEREI“ : Familie und Leben des Strafrechtlers und Kriminologen Franz Exner (1881-1947) ; eine biographische Skizze / Doris Lorenz. Betreuer: Franklin Kopitzsch." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2013. http://d-nb.info/1041716583/34.

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30

Schuler, Hannes [Verfasser], Axel [Gutachter] Kramer, and Martin [Gutachter] Exner. "Mikrobielle und partikuläre Belastung der Raumluft unter turbulenzarmer Verdrängungsströmung sowie Mischlüftung während des OP-Betriebs / Hannes Schuler ; Gutachter: Axel Kramer, Martin Exner." Greifswald : Universität Greifswald, 2019. http://d-nb.info/1196293325/34.

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31

Exner, Benjamin [Verfasser], Lukas J. [Gutachter] Gooßen, Gerald [Gutachter] Dyker, and Stefan M. [Gutachter] Huber. "Emissionsvermeidung und chemische Nutzung klimaschädlicher Verbindungen / Benjamin Exner ; Gutachter: Lukas J. Gooßen, Gerald Dyker, Stefan M. Huber ; Fakultät für Chemie und Biochemie." Bochum : Ruhr-Universität Bochum, 2019. http://d-nb.info/1202608949/34.

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32

Exner, Anne Kathrin [Verfasser]. "Gesund leben nach Krebsdiagnose – ein Widerspruch? Ernährungs- und Sportverhalten von Frauen mit Brustkrebs im Anschluss an eine medizinische Rehabilitation / Anne Kathrin Exner." Bielefeld : Universitätsbibliothek Bielefeld, 2015. http://d-nb.info/1075594480/34.

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33

Doehring, Claudius [Verfasser], Ulrich [Akademischer Betreuer] Hegerl, Maria [Akademischer Betreuer] Strauß, Peter [Gutachter] Schönknecht, and Claudia [Gutachter] Exner. "Die Prüfung der Test-Retest-Reliabilität des Onset of Depression Inventory / Claudius Doehring ; Gutachter: Peter Schönknecht, Claudia Exner ; Ulrich Hegerl, Maria Strauß." Leipzig : Universitätsbibliothek Leipzig, 2016. http://d-nb.info/1240695950/34.

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34

Canestrelli, Alberto. "Numerical Modelling of Alluvial Rivers by Shock Capturing Methods." Doctoral thesis, Università degli studi di Padova, 2009. http://hdl.handle.net/11577/3421764.

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The problem of modelling both the unsteady hydrodynamics and the bed morphological variations in natural channels is generally performed by solving the De Saint Venant balance equations for the liquid phase together with the Exner continuity equation for the sediments carried as bed-load. This thesis focuses on the development of an high-order accurate centred scheme of the finite volume type for the numerical solution of the coupled De Saint Venant-Exner system. A new scheme, called PRICE-C, is proposed. It solves the system of equations in a non-conservative form, however it has the important characteristic of reducing automatically to a conservative scheme if the underlying PDE system is a conservation law. It is applied to the shallow water equations in the presence of either a fix or a movable bed. The scheme is first introduced in a one-dimensional framework, and it is then extended to the two-dimensional case. The extension is not straightforward in the case of an unstructured mesh, since averages over suitable edge-based control volumes have to be performed. The scheme is extended to high order of accuracy in space and time via the ADER-WENO and MUSCL technique respectively for the one- and twodimensional case. The well-balanced property of the scheme is proven, i.e. the ability to reach steady states also in the presence of discontinuous water surface or discontinuous bottom profile. The scheme can deal with subcritical and supercritical flows, as well as transcritical situations. Moreover the proposed approach leads to a correct estimate of the celerity of surface discontinuities as well sediment bores and small bottom perturbations. The main characteristic of the scheme is its simplicity: it is based on a simple centred approach, that means that the knowledge of the eigenvalues of the matrix of the system is not required. This is important since the interaction between sediment transport and water flow not always admits detailed knowledge of the eigenstructure. Hence this scheme can be useful to engineers since they need simple numerical tools that can be easily used without entering in the mathematical detail of the differential hyperbolic system under consideration. Moreover the centred strategy gives generality to the scheme: in fact, it can be applied without modification to any kind of hyperbolic equations with non-conservative terms.
La modellazione dell’idrodinamica e delle variazioni orfologiche in canali naturali `e generalmente effettuata risolvendo numericamente le equazioni delle onde lunghe in acque basse, che regolano il moto della fase fluida, assieme all’equazione di Exner, che descrive l’evoluzione del fondo. L’argomento della presente tesi consiste nello sviluppo di un schema ai volumi finiti di tipo ”centrato” per la soluzione accoppiata di tale sistema di equazioni. Un nuovo schema, denominato PRICE-C, `e qui introdotto: esso risolve le equazioni in forma conconservativa, ma ha l’importante propriet`a di degenerare in uno schema conservativo se il sottostante sistema di equazioni ammette una forma conservativa. Lo schema `e applicato alle equazioni delle onde lunghe in acque basse sia nel caso di fondo fisso che di fondo mobile, dapprima in un ambito unidimensionale e successivamente in quello bidimensionale. L’estensione non `e immediata nel caso in cui il reticolo di calcolo sia non-strutturato, dal momento che le equazioni differenziali devono essere mediate su opportuni volumi di controllo. Lo schema `e poi esteso ad alti ordini di accuratezza nello spazio e nel tempo attraverso le procedure ADER-WENO e MUSCL rispettivamente per il caso unidimensionale e bidimensionale. Inoltre si dimostra come lo schema proposto verifichi la ”well-balanced property”, che consiste nella capacit`a di raggiungere soluzioni stazionarie, anche in presenza di discontinuit`a della superficie libera e del fondo. Condizioni di corrente lenta e rapida, come pure condizioni di tipo transcritico vengono correttamente risolte. Inoltre lo schema in grado di riprodurre le celerit`a di propagazione di discontinuit`a della superficie e fronti di sedimenti al fondo, cos`? come la celerit`a di propagazione di piccoli disturbi del fondo. Caratteristica principale dello schema `e la sua semplicit`a: `e basato su un semplice approccio di tipo centrato, cio`e non necessita la conoscenza degli autovalori della matrice del sistema. Questa `e un’importante caratteristica dal momento che non sempre autovalori e autovettori sono calcolabili analiticamente, in particolare nel caso di complesse formule di chiusura per il trasporto al fondo. Quindi questo schema pu`o rivelarsi utile per l’ingegnere che spesso necessita di un semplice strumento numerico che possa essere applicato ad un sistema di equazioni differenziali di tipo iperbolico senza dover entrare nel dettaglio delle propriet`a atematiche del sistema stesso. Data la sua generalit`a, infatti, lo schema pu`o essere applicato ad ogni tipo di sistema iperbolico contenente termini non-conservativi.

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35

Moritz, Miriam M. [Verfasser], Hans-Curt Akademischer Betreuer] Flemming, and Martin [Akademischer Betreuer] [Exner. "Integration of hygienically relevant bacteria in drinking water biofilms grown on domestic plumbing materials / Miriam Moritz. Gutachter: Martin Exner. Betreuer: Hans-Curt Flemming." Duisburg, 2011. http://d-nb.info/1015361595/34.

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36

Bouharguane, Afaf. "Analyse, simulation numérique et optimisation de modèles non-locaux en morphodynamique littorale." Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20032.

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Ce travail est motivé par une demande croissante d'informations quantitatives sur l'évolution du littoral. Nous avons étudié deux approches pour l'analyse de la dynamique sédimentaire. Les deux techniques aboutissent à la résolution de modèles non-locaux pour le fond. L'étude mathématique a porté sur l'analyse de l'existence et l'unicité de perturbations autour des ondes progressives solutions du modèle de Fowler. Nous avons montré que les solutions constantes de l'équation de Fowler sont instables. Pour la simulation numérique de ce modèle, nous avons dans un premier temps considéré des schémas aux différences finies explicites pour lesquels nous avons obtenu des critères de stabilité numérique. Dans un second temps, nous avons utilisé une approche par splitting de sorte à pouvoir résoudre la convection, puis la diffusion et l'anti-diffusion fractionnaire de façon exacte. Ensuite, il est apparu que nous pouvions utiliser les principes de minimisation pour décrire l'évolution d'un lit érodable sous l'action de l'eau où le fond est considéré comme une structure déformable de faible rigidité s'adaptant en minimisant une certaine fonctionnelle d'énergie. Il est intéressant de constater que cette seconde approche peut être liée à la première car elle débouche aussi sur une équation de type Exner avec un terme non-local. En nous inspirant du modèle morphodynamique non-local de Fowler, nous concluons cette thèse par une application exotique au traitement de signal où nous proposons une nouvelle méthode de filtrage
This work is motivated by a growing demand for quantitative information on the evolution of the coastline.We have studied two approaches for the analysis of sand morphodynamics.Both techniques lead to the resolution of nonlocal models for the seabottom.The mathematical study focused on the analysis of the existence and uniqueness of perturbations around the travelling-waves solutions of the Fowler model. We have shown that constant solutions of Fowler's equation are unstable.For the numerical simulation of this model, we have first considered explicit finite difference schemes for which we got numerical stability criteria. We have next used an approach by splitting method in order to solve first the convection, then the diffusion/fractional anti-diffusion exactly. We have also used minimization principles to describe the evolution of an erodible bed sheared by a fluid flow where the seabed is considered as a deformable structure with low stiffness whichadapts itself by minimizing a certain energy functional. It is interesting to note that this secondapproach can be linked to the first one because it also leads to a new Exner equation with a nonlocal term for the flux. Inspired by Fowler's morphodynamical model, we conclude this dissertation with an unexpected application to signal processing

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37

Exner, Valentin Alexander [Verfasser], and Arne [Akademischer Betreuer] Simon. "Antibiotika-Verordnungen bei Atemwegsinfektionen im Kindesalter : Auswertung einer bundesweiten Umfrage bei Fachärzten für Kinder- und Jugendmedizin oder Allgemeinmedizin / Valentin Alexander Exner ; Betreuer: Arne Simon." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2019. http://d-nb.info/1204060169/34.

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38

Rivera, Carpio Sylvia. "Object-relations in maltreated and abused children assessed with the Rorschach inkblots and the Mutuality of Autonomy Scale (Urist)." Pontificia Universidad Católica del Perú, 2012. http://repositorio.pucp.edu.pe/index/handle/123456789/99641.

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The objective of the study was to observe the quality of the object-relations in maltreated and institutionalized boys and girls, assessed with the Rorschach inkblots and the Mutuality of AutonomyScale (MOA) of Urist. The participants were 23 children of both sexes, aged 8 to 10,who had been maltreated in their household and were institutionalized in an orphanage. The results showed that both tools reflect object-relations well. There are significant differences, depending on the sex, time of Separation from their maternal figure and the type of maltreatment they received. Furthermore, the children represent more adaptative, conventional and positive object relations what is related with their resources.
El objetivo fue conocer cómo es la calidad de las relaciones objetales en Jos niños y niñas institucionalizados, que han sido objeto de algún tipo de maltrato, a través del Psicodiagnóstico de Rorschach (Exner) y de la Escala de Mutualidad de Autonomía (MOA) de Urist. Los participantesfueron 23 niños de ambos sexos, entre 8 y 1 O años que habían recibido maltrato en su entorno familiar. El grupo de estudio provino de los niños institucionalizados que se encuentran internados en un puericultorio, pertenecientes a un sector socio económico bajo. Los resultados mostraron que ambos instrumentos reflejan la calidad de las relaciones objetales de manera adecuada. Asimismo, existen diferencias significativas de acuerdo al sexo, momento de separación de la figura materna y tipo de maltrato recibido. Por otro lado, los menores de nuestro estudio logran representarse relaciones más adaptativas, convencionales y positivas que nos ligancon sus recursos.

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39

Exner, Katharina [Verfasser]. "Infektionen des diabetischen Fußsyndroms: Umfassende Mikrobiom-Analyse mittels Bakterien-Kultur, quantitativer Real-Time-PCR, PCR/DHPLC und Evaluation der Biofilmbildung ausgewählter Bakterienisolate / Katharina Exner." Gießen : Universitätsbibliothek, 2020. http://d-nb.info/1223461912/34.

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40

Braun, Exner Louisa [Verfasser], and Stefan [Akademischer Betreuer] Engeli. "Einfluss von Adipositas und Gewichtsreduktion auf Progranulin, PEDF, Betatrophin und Adipolin / Louisa Braun Exner. Institut für Klinische Pharmakologie der Medizinischen Hochschule Hannover. Betreuer: Stefan Engeli." Hannover : Bibliothek der Medizinischen Hochschule Hannover, 2015. http://d-nb.info/1077915969/34.

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41

Exner, Louisa [Verfasser], and Stefan [Akademischer Betreuer] Engeli. "Einfluss von Adipositas und Gewichtsreduktion auf Progranulin, PEDF, Betatrophin und Adipolin / Louisa Braun Exner. Institut für Klinische Pharmakologie der Medizinischen Hochschule Hannover. Betreuer: Stefan Engeli." Hannover : Bibliothek der Medizinischen Hochschule Hannover, 2015. http://d-nb.info/1077915969/34.

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42

Exner, Jan-Phillipp Harald [Verfasser], and Andreas-Claudius [Akademischer Betreuer] Hoffmann. "Survivorship-Untersuchung bei multimodal behandelten Lungenkarzinomen : endokrinologische, hämatologische, immunologische und pulmonologische Spättoxizitäten und konkurrierende Risiken zum Langzeitüberleben / Jan-Philipp Harald Exner ; Betreuer: Andreas-Claudius Hoffmann." Duisburg, 2020. http://d-nb.info/1206538392/34.

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43

Heym, Peter Paul [Verfasser], Ludger A. [Akademischer Betreuer] Wessjohann, and Thomas E. [Akademischer Betreuer] Exner. "In silico characterisation of AtPARP1 and virtual screening for AtPARP inhibitors to increase resistance to abiotic stress / Peter Paul Heym ; Ludger A. Wessjohann, Thomas E. Exner." Halle, 2016. http://d-nb.info/1123998507/34.

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44

Exner, Daniel Philipp [Verfasser], Marianne [Akademischer Betreuer] Borneff-Lipp, Wilfried [Akademischer Betreuer] Mau, and Axel [Akademischer Betreuer] Kramer. "Nosokomiale Infektionen in einem französischen Langzeitpflegeheim : Inzidenz, Risikofaktoren und Aspekte der Prävention im deutsch-französischen Vergleich / Daniel Philipp Exner. Betreuer: Marianne Borneff-Lipp ; Wilfried Mau ; Axel Kramer." Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2012. http://d-nb.info/1025302249/34.

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45

Exner, Nadine Verfasser], Nicola [Akademischer Betreuer] [Döring, and Thomas [Akademischer Betreuer] Köhler. "Entwicklung und Überprüfung eines Modells zur langfristigen Nutzung von Smart Metern - Eine Panelstudie mit drei Wellen / Nadine Exner. Technische Universität Ilmenau. Gutachter: Thomas Köhler. Betreuer: Nicola Döring." Ilmenau : Universitätsbibliothek Ilmenau, 2014. http://d-nb.info/1065269625/34.

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46

Exner, Matthias P. [Verfasser], Nediljko [Gutachter] Budisa, and Zoya [Gutachter] Ignatova. "Incorporation of novel noncanonical amino acids in model proteins using rational and evolved variants of Methanosarcina mazei pyrrolysyl-tRNA synthetase / Matthias P. Exner ; Gutachter: Nediljko Budisa, Zoya Ignatova." Berlin : Technische Universität Berlin, 2016. http://d-nb.info/1156013801/34.

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47

Dörfel, Dorothea [Verfasser], Axel [Akademischer Betreuer] Kramer, Axel [Gutachter] Kramer, and Martin [Gutachter] Exner. "Antiseptische Wirksamkeit alkoholbasierter Antiseptika mit Zusatz von PVP-Iod oder Chlorhexidindigluconat auf die anaerobe und aerobe Hautflora der Schulterregion / Dorothea Dörfel ; Gutachter: Axel Kramer, Martin Exner ; Betreuer: Axel Kramer." Greifswald : Universität Greifswald, 2021. http://d-nb.info/1236693132/34.

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48

Bonetto, Irma. "Modellazione matematica della componente diffusiva del trasporto solido al fondo in uno schema di calcolo bidimensionale." Doctoral thesis, Università degli studi di Padova, 2017. http://hdl.handle.net/11577/3422879.

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The objective of the present work is to give further insights on the problem of the numerical description of the bed load transport. Here, two importante issues are addressed. A finite volume method is developed and applied for solving the Exner equation combined with an upwind discretization based on the direction of the sediment transport, in order to improve the accuracy and the stability of an existing morphodynamic model. The new approach shows a significant improvement; the modified model well describes the propagation of simple bed forms and the formation and evolution of free bars. A new formulation of the solid flux is then introduced in the model to account for the stochastic nature of the bed load transport and to describe the related sediment diffusion. The sediment flux is represented as the sum of an advective term and a diffusive one. The latter is given as a random bedload flux at each computational grid element and at time step. To trace the movements of the sediment particles and check the efficiency of the proposed approch a multigranular representation is developed and two equal size sediment classes are introduced. In addition, to account for the exchange of material between the bed surface and the bottom, the bed is divided into a number of layers.
Nella presente ricerca, noti i problemi di stabilità legati all’implementazione dell’equazione di Exner, sono stati approfonditi alcuni aspetti riguardanti la descrizione numerica del trasporto solido di fondo in un modello matematico bidimensionale pre-esistente. Dopo una prima fase di sperimentazione numerica, l’equazione di Exner è stata implementata ai volumi finiti e i flussi sono stati valutati mediante upwinding garantendo così la conservazione della massa e la stabilità della soluzione. Il modello modificato si è dimostrato in grado di descrivere in modo accurato l’evoluzione di alcune semplici forme di fondo e di riprodurre il processo di formazione e propagazione delle barre alternate. Successivamente è stata indagata la natura stocastica del trasporto solido di fondo con particolare riferimento alla modellazione matematica della sua componente diffusiva. Data la struttura del modello originario è apparso efficace introdurre la diffusione in modo indirettamente lagrangiano, come combinazione di una portata solida convettiva e di una componente casuale. L’intensità della diffusione è venuta così a dipendere dal reale coefficiente di diffusione, dalla portata media e dall’intervallo di integrazione temporale. Per consentire il tracciamento dei grani, al fine di verificare la correttezza e l’efficacia dell’approccio proposto, è stato introdotto un approccio multigranulare e, per completezza, è stata modificata anche la schematizzazione del fondo introducendo una rappresentazione multistrato. La validità dell’approccio introdotto è stata testata e verificata con idonee sperimentazioni numeriche.

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49

Ung, Philippe. "Simulation numérique du transport sédimentaire : aspects déterministes et stochastiques." Thesis, Orléans, 2016. http://www.theses.fr/2016ORLE2019/document.

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Dans cette thèse, nous nous intéressons à l'étude d'un modèle de transport de sédiments en nous plaçant sous deux angles d'approche différents. L'un concerne la modélisation numérique du problème et propose une méthode de résolution numérique basée sur un solveur de Riemann approché pour le système de Saint-Venant-Exner qui reste un des systèmes les plus répandus pour traiter le transport sédimentaire par charriage. Ce dernier repose sur un couplage du modèle hydraulique de Saint-Venant et du modèle morphodynamique d'Exner. Le point essentiel de la méthode proposée se situe au niveau du traitement du couplage de ce système. En effet, il existe deux stratégies; la première consiste à découpler la résolution de la partie fluide de la partie solide et les faire interagir à des instants donnés alors que la seconde considère une résolution couplée du système en mettant à jour conjointement les grandeurs hydrauliques et solides aux mêmes instants. Se posera alors la question du choix de la stratégie de résolution pour laquelle nous apporterons des éléments de réponses en comparant les deux approches. L'autre se concentre sur la mise en place d'une méthodologie pour l'étude des incertitudes liées au même modèle. Pour ce faire, nous proposons une formulation stochastique du système de Saint-Venant-Exner et nous cherchons à caractériser la variabilité des sorties par rapport aux paramètres d'entrée naturellement aléatoires. Cette première étude révélera la nécessité de revenir à un système de Saint-Venant avec un fond bruité pour étudier la sensibilité des grandeurs hydrauliques par rapport aux perturbations topographiques
In this thesis, we are interested on the study of a sediment transport model through two different approaches. One of them concerns the numerical modelling of the problem and proposes a numerical problem-solving method based on an approximate Riemann solver for the Saint-Venant-Exner system which is one of the most common model to deal with sedimentary bed-load transport. This last one is based on a coupling between the hydraulic model of Saint-Venant and the morphodynamic model of Exner. The key point of the proposed method is the treatment of the coupling issue. Indeed, there exists two strategies; the first one consists on decoupling the resolution of the fluid part from the solid part and making them interact at fixed times whereas the second one considers a coupled approach to solve the system by jointly updating the hydraulic and solid quantities at same times. We then raise the issue of the choice of the strategy for which we suggest answers by comparing both approaches. The other one focuses on the development of a methodology to study the uncertainties related to the model previously mentioned. To this end, we propose a stochastic formulation of the Saint-Venant-Exner system and we look for characterizing the variabilities of the outputs in relation to the naturally random input parameters. This first study reveals the need for a return to the Saint-Venant system with a perturbed bed to understand the sensitivity of the hydraulic quantities on the topographical perturbations

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50

Smuts, Sonia. "A Rorschach study of fifteen women with trichotillomania." Diss., Pretoria : [s.n.], 2002. http://upetd.up.ac.za/thesis/available/etd-03072005-121028.

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