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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
121

Ingénierie système guidée par les modèles : Application du standard IEEE 15288, de l'architecture MDA et du langage SysML à la conception des systèmes mécatroniques

Turki, Skander 02 October 2008 (has links) (PDF)
La conception des systèmes mécatroniques, vu leur complexité, nécessite d'entreprendre une approche systémique qui implique l'utilisation d'une méthodologie permettant, en premier lieu, de considérer le système avec toutes ces composantes (mécanique, électronique, informatique, etc.), de concevoir et de spécifier ce système par la définition de ces composants et des liens qui existent entre eux. D'autre part, elle doit aussi donner la possibilité de décrire ces composants avec les outils existants des différents domaines technologiques. Nous nous sommes tournés vers des technologies orientées-objet, en l'occurence l'ingénierie guidée par les modèles MDE, pour construire une méthodologie permettant d'entreprendre cette approche systématique supportant les activités d'ingénierie décrites dans le standard ISO/IEC/IEEE 15288. Dans cette thèse, nous proposons une méthodologie qui répond à ces besoins intitulés MISSyM. Dans MISSyM, les activités de conception sont réalisées sur des modèles SysML étendus par des profils supportant le standard IEEE 15288. De plus, MISSyM intègre le support d'éléments de modélisation spécifiques aux systèmes mécatroniques. Nous avons aussi intégrer dans MISSyM une extension à SysML supportant les Bonds Graphs et permettant d'entreprendre une analyse énergétique. Nous avons par la suite enrichi la méthodologie MISSyM par une méthode de vérification de la qualité de l'architecture qui repose sur un algorithme utilisant des métriques et un algorithme de partitionnement de la matrice de dépendances ou DSM. Nous avons en plus ajouté la génération de codes vers le langage de simulation Modelica. Finalement, nous avons décrit le processus global de la méthodologie basé sur l'architecture de modèles MDA et en concordance avec le standard IEEE 15288. Nous avons fourni un exemple d'application pour permettre aux ingénieurs système de mieux utiliser le langage SysML à travers cette méthodologie.
122

Ingénierie système guidée par les modèles: Application du standard IEEE 15288, de l'architecture MDA et du langage SysML à la conception des systèmes mécatroniques

Turki, Skander 02 October 2008 (has links) (PDF)
La conception des systèmes mécatroniques, vu leur complexité, nécessite d'entreprendre une approche systémique. Une approche systémique implique l'utilisation d'une méthodologie permettant, en premier lieu, de considérer le système avec toutes ses composantes (mécanique, électronique, informatique, etc.) et de fournir les moyens de concevoir et de spécifier ce système par la définition de ses composants et des liens qui existent entre eux. D'autre part, cette méthodologie doit aussi donner la possibilité de décrire ces composants avec les outils existants dédiés aux domaines technologiques. Nous nous sommes tournés vers des technologies orientées-objet, en l'occurrence l'ingénierie guidée par les modèles MDE, pour construire une méthodologie permettant d'entreprendre cette approche systémique supportant les activités d'ingénierie décrites dans le standard ISO/IEC/IEEE 15288. Dans cette thèse, nous proposons donc une méthodologie qui répond à ces besoins et que nous avons intitulé MISSyM. Dans MISSyM, les activités de conception sont réalisées sur des modèles SysML étendus par des profiles supportant le standard ISO/IEC/IEEE 15288. De plus, MISSyM intègre le support d'éléments de modélisation spécifiques aux systèmes mécatroniques qui sont le composant mécatronique ainsi que des extensions et des design pattern spécifiques. Nous avons aussi intégré dans MISSyM une extension au langage SysML supportant les Bond Graphs et permettant d'entreprendre une analyse énergétique des systèmes hétérogènes. Nous avons par la suite enrichi la méthodologie MISSyM par une méthode de vérification de la qualité de l'architecture qui repose sur un algorithme utilisant des métriques sur les modèles décrivant l'architecture d'un composant donné ou du système puis appliquant un algorithme de partitionnement de la matrice de dépendances ou DSM (existant) pour proposer une amélioration de cette architecture. Nous avons en plus fourni l'ouverture vers le langage de simulation Modelica par la génération de code. Et finalement, nous avons décrit le processus global de la méthodologie basé sur l'architecture de modèles MDA et en concordance avec le standard d'ingénierie système ISO/IEC/IEEE 15288. Nous avons fourni un exemple d'application pour permettre aux ingénieurs système de mieux utiliser le nouveau langage SysML à travers cette méthodologie.
123

Le Développement Agile de Services de Télécommunication Intégrés via des techniques d'ingénierie des modèles.

Belaunde, Mariano 20 January 2011 (has links) (PDF)
Pour devenir ou rester compétitif, un opérateur télécom doit constamment enrichir ou adapter son offre de services. Cette recherche permanente d'innovation implique de rendre agiles les processus de création de service. Par agilité nous entendons non seulement la capacité à mettre rapidement sur le marché de nouvelles idées de service mais également de s'assurer de leur évolution dans un environnement technologique changeant. Dans ce mémoire de thèse nous défendons l'idée qu'une utilisation pragmatique et combinée des principes du SOA avec les technologies d'ingénierie des modèles peut être un facteur clef pour l'optimisation du processus de création de services et pour répondre aux exigences de l'agilité. L'approche que nous recommandons dans le cas des services de télécommunications que nous avons étudié (les services composites intégrés et les services vocaux) c'est d'abord d'utiliser des langages dédiés (DSL) graphiques et/ou textuels pour la spécification de haut niveau des services, ensuite d'exploiter ces spécifications dans des environnements de création et d'exécution (frameworks) orientés modèles supportant nativement le DSL, afin de permettre le test et la simulation au plus tôt des fonctionnalités du service via des itérations rapides. Enfin une automatisation importante du déploiement vers les plates-formes de production (serveurs d'application) et les terminaux mobiles (code client) via le développement de transformateurs dédiés. Le travail présenté dans cette thèse est validé par plusieurs expérimentations et démonstrations portant sur des services vocaux et des services de télécommunication intégrés composites (exploitant des ressources télécom et des facilités issues de l'industrie informatique).
124

African Traditional Culture and modernity in Zakes Mda's The heart of redness.

Birama, Prosper Ndayi. January 2008 (has links)
<p>&nbsp / </p> <p>&nbsp / </p> <p align="left">In my thesis entitled &lsquo / African Tradition and Modernity in Zakes Mda&rsquo / s <i><font face="Times New Roman" size="3"><font face="Times New Roman" size="3">The Heart of Redness&rsquo / </font></font><font face="Times New Roman" size="3"><font face="Times New Roman" size="3">, I analyze the way Western modernity and African traditions interact in Mda&rsquo / s novel. I suggest that both modernity and tradition interact to produce a hybrid culture. This will become apparent in my analysis of the way Mda depicts the cattlekilling episode and the effects of Nongqawuse&rsquo / s prophecy, and also in the novel&rsquo / s contemporary characters. Mda shows the development of an African modernity through the semi-autobiographical figure of Camagu who is not slavishly indebted to Western ideas of progress, but is a hybrid of African values and a modern identity.</font></font></i></p> <p align="left">&nbsp / </p>
125

Ways of Dying : The depiction of Life and Death in Zakes Mda's novel

Rudolf, Gabriel January 2011 (has links)
Abstract This bachelor’s essay focuses on the depictions of life and death in the novel Ways of Dying by Zakes Mda. It claims that the novel is mainly focusing on a concept of life although it is set in a time in South Africa which is filled with death. The theory being used in the essay is mainly the postcolonial theory by Elleke Boehmer regarding terror since her definitions of terror corresponds very well to what is written in the novel. To add to this postcolonial theorist the essay has a feature of the structuralist binaries to enhance the focus upon the dichotomies of Life and Death. The essay discusses the situation of violence in transitional South Africa as described by the novel and focuses mainly on violence and politics to investigate the depictions of death. The representations of life in the novel are mainly shown through the magical realism, the story telling and the funerals which are visited by the main character Toloki. The essay explains that the novel is mainly focused on the binary opposite of life because of among other things the ending and the depictions of the funerals.
126

MDA transformation: A case study of embedded systems

Liu, Jo-Chan 13 July 2010 (has links)
Object-oriented analysis and design approach has become the mainstream of today¡¦s systems development technique. The Timing Diagram and State Machine Diagram from the Unified Modeling Language (UML) are becoming the major tools for modeling the platform independent model (PIM) of an embedded system. Once these two diagrams are constructed, the results can then be transformed into its platform specific model and template code based on the model driven architecture (MDA) approach. However, the detailed guideline for the transformation from Timing Diagram and State Machine Diagram to the template code is lacking. Therefore, this study presents a methodology which provides guidelines for the transformation from State Machine Diagram and Timing Diagram to template code for the embedded system. The research methodology is articulated using the design science research methodology. A usability evaluation with a real-world embedded system case is performed to demonstrate its applicability. The results indicated that with this proposed method, the system developer can effectively transform the PIM of an embedded system into its template code.
127

Proteomic analysis of MDA-MB-435S transfected by HGF truncated variants

Lin, Heng-Hsu 24 January 2011 (has links)
Hepatocyte growth factor (HGF) and its specific receptor MET play a role in many physiological functions including proliferation, migration and morphogenesis. Recently, research results in our laboratory showed that recombinant HGF variants (NK1, NK2, NK3 and NK4) became antagonists to HGF/MET pathway by suppressing proliferation, migration and invasion in human breast cancer cells (MDA-MB-435S, MDA). Similar results were achieved when HGF variants genes were introduced in MDA cells. To understand the molecular mechanism of breast cancer cells metastasis suppressed by HGF variants, MDA and five transfectants, including MDA-GFP, MDA-NK1, MDA-NK2, MDA-NK3 and MDA-NK4 cells were used for proteomic analysis using two-dimensional electrophoresis (2-DE). Differential analysis revealed that a total of 56 polypeptides were differentially expressed through five sets of comparison using wild-type MDA cells as a control. A total of 17 polypeptides were shown differential expression between MDA and MDA-GFP cells, with 11 down-regulated and 6 up-regulated. Eighteen polypeptides were differentially expressed between MDA and MDA-NK1 cells, with 15 down-regulated and 3 up-regulated. There were 22 differentially expressed polypeptides found between MDA and MDA-NK2 cells, in which 14 were down-regulated and 8 were up-regulated. Sixteen polypeptides were shown differentially expressed between MDA and MDA-NK3 cells, with 11 down-regulated and 5 up-regulated. A total of 18 polypeptides were shown differential expression between MDA and MDA-NK4 cells, with 15 down-regulated and 3 up-regulated. Proteomic analysis showed that a total of 43 polypeptides were differentially expressed through four sets of comparison (MDA-GFP and MDA-NK1, MDA-GFP and MDA-NK2, MDA-GFP and MDA-NK3, and MDA-GFP and MDA-NK4). To understand the differential expression among different HGF variants-transfected MDA cells, three sets of cross analysis were also carried out (MDA-NK1 and MDA-NK2, MDA-NK1 and MDA-NK3, and MDA-NK1 and MDA-NK4) and the results showed that a total of 37 differentially expressed polypeptides were found in the three sets of comparison. Similarly, when MDA-NK2 cells were used as a control to compare with MDA-NK3 and MDA-NK4 cells, 34 significantly differential expressed polypeptides were found. The last set of comparison between MDA-NK3 and MDA-NK4 cells, 19 polypeptides were found significantly differential expression. Therefore, our current results revealed that the differentially expressed polypeptides in MDA-MB-435S cells and HGF variants-transfected MDA cells could be related to the inhibition of proliferation and migration of human breast cancer cells by HGF variants.
128

A Modeling Methodology for Automotive Embedded System¡GAn MDA Approach with UML

Lin, Chia-Chun 11 July 2012 (has links)
Automotive embedded systems used much in the main body control system. Also because the system needs to meet functional requirement, environment requirement, timing requirement, interface requirement and Failure Mode and Effects Analysis (FMEA) so it is necessary to have an automotive embedded systems modeling methodology. Therefore, this study proposes an automotive embedded systems modeling methodology which combines MDA and UML, and detailed description of the model diagram used by each modeling phase and the diagram modeling method and steps. System development team can be clearly implemented in accordance with the methods and steps for automotive embedded system modeling. The methodology also can be used as the communication standard of the system development team. Systems modeling during system modular can promote module reuse rate in order to enhance the efficiency of system development. The methodology of this study is based on design science research methods, usability evaluation of the modeling methodology is implemented for the modeling of demand for Parking aid control unit, the PIM modeling and code conversion. With prove the availability of this modeling methodology. From the results of the assessment system development team can be based on the methodology of modeling methods and procedures to express the results in line with the needs and systems analysis and design of automotive embedded systems and convert the system operating platform and code.
129

Comparative Effects Of Emodin On Biological Activities Of Mcf-7 And Mda-231 Cell Lines

Sakalli, Elif 01 December 2010 (has links) (PDF)
Emodin (1,3,8-trihydroxy-6-methylanthraquinone) is a phytoestrogenic component of Rheum plant extracts which has been used for medical treatment since ancient times. It has been shown to have anti-inflammatory and anti-cancer effects. In our research, we aimed to study the biological effects of emodin on MCF-7 and MDA-231 cell lines. Cytotoxicity assays showed that emodin treatment for 48hours caused a concentration dependent decrease in viable cell numbers of both cell lines. As determined by cell counting with tryphan blue, IC50 values were 8.40 and 12.17 &micro / g/ml for MCF-7 and MDA-231 cells, respectively. Apoptotic effects of emodin was investigated by measuring the changes in apoptotic and antiapoptotic gene expressions by qRT-PCR. In MCF-7 cells, Bax expression increased with increasing emodin concentrations, while Bcl-2 expression was downregulated. Bax/Bcl-2 ratio was calculated as 9.2 fold at 10&micro / g emodin/ml treatment for 48 hours, indicating stimulation of apoptosis. However, Bax/Bcl-2 ratio was found 1.6 fold for MDA-231 cells. These results were in accordance with the results obtained from microarray analysis of related gene expressions. MCF-7 cells were more apoptotic in comparison to MDA-231 cells. DNA fragmentation was observed in MCF-7 cells by TUNEL method. GST enzyme activity that was measured using CDNB as substrate, was increased 100% with respect to control up to 5&micro / g emodin/ml treatment of MCF-7 cells for 48 hours. However, effect of emodin on GST activity in MDA-231 cells was found insignificant. According to microarray analysis results, emodin affected the gene expressions of GST isozymes in MCF-7 cells much more than in MDA-231 cells.
130

Model Driven Architecture in Adaptive Library Generation

Jimenez Moral, Inmaculada, De Arcayne Mañá, Joan January 2008 (has links)
<p>This master thesis is about building an adaptive library based on a platform independent model, which represents a conceptual design realizing the functional requirements being independent of the technologies and software architectures changes.</p><p>This adaptive library is a model, which has a higher level of abstraction than the code that we will generate afterwards, generalizes the solution of those problems that can be resolved using different implementations that uses different kinds of data structures.</p><p>In addition the higher level of abstraction that this adaptive library is having will give a speed up in developing the application and higher quality solution because of the maintainability and reusability. This solution is going to have the propriety to be changed easily in order to solve different concrete problems.</p>

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