La stéganographie est l'art de la communication secrète. L'objectif est de dissimuler un message secret dans un médium anodin de sorte qu'il soit indétectable. De nos jours, avec la généralisation d'Internet et l'apparition des supports numériques (fichiers audio, vidéos ou images), plusieurs philosophies de conception de schéma stéganographique ont été proposées. Parmi les méthodes actuelles appliquées aux images numériques naturelles, nous trouvons les méthodes d'insertion adaptative, dont le principe repose sur la modification du médium de couverture avec une garantie d'avoir un certain niveau de sécurité. Ces méthodes représentent une véritable avancée en stéganographie.Dans ce manuscrit, après avoir rappelé les concepts récents de stéganographie adaptative, nous présentons une procédure automatique et complète pour l'insertion adaptative de données secrètes dans des images numériques naturelles. L'approche proposée est une " méta-méthode " basée " oracle ", appelée ASO (Adaptive Steganography by Oracle), qui permet de préserver à la fois la distribution de l'image de couverture et la distribution de la base d'images utilisée par l'émetteur. Notre approche permet d'obtenir des résultats nettement supérieurs aux méthodes actuelles de l'état de l'art, et est donc l'une, si ce n'est la meilleure approche du moment. Par ailleurs, nous définissons également un nouveau paradigme en stéganographie qui est la stéganographie par base, ainsi qu'une nouvelle mesure de sélection pour les images stéganographiées, permettant d'améliorer encore plus les performances de notre schéma d'insertion. Les différentes expérimentations, que nous avons effectuées sur des images réelles, ont confirmé la pertinence de cette nouvelle approche.

In this thesis success and failure of Enterprise Resource Planning (ERP) implementations through case studies of three Turkish organizations based on Critical Success Factors (CSFs) is investigated. The main purpose of this thesis is to reveal success and failure stories according to the effects of CSFs in ERP implementations. The case studies are composed of three Turkish organizations from different sectors. The data is gathered through active observations, analysis of project documents and interviews conducted with project managers who decided to implement ERP systems in their organizations, key users who involved in implementation projects, and consultants. All these projects are evaluated as success stories since most of the determined CSFs affected the implementation projects positively in these three organizations which have been using ERP system effectively for some period. Besides, the case studies show that there are problems about training, change management and legacy systems during projects and more attention should be paid on these issues during ERP implementation projects.

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Made available in DSpace on 2016-08-03T12:19:31Z (GMT). No. of bitstreams: 1 SUEHELLEN MONTEIRO DE MATOS.pdf: 677634 bytes, checksum: 59a28d5b0f6afe29b7c40c031f6365be (MD5) Previous issue date: 2013-08-26 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / This exegetical study aims to demonstrate the maternal face of Yahweh revealed in the writings of Deutero-Isaiah, having as main source the oracle of salvation Is 43.1-7. To this end, we start from the analysis of the literary context, historical and religious Deutero-Isaiah, so that make the exegetical analysis of the text proposed by which we will focus, among various contents, the characteristic maternal presented in the passage. Understanding a text arises within a social environment, will highlight, based on the writings Deutero-Isaiah, the exiled community to which they are addressed prophets and prophetesses. Finally, combining the attributes of maternal goddesses Asherah and Ishtar with the fledgling maternal conception of Yahweh made by Hosea, we propose the maternal face of God based on texts of Deutero-Isaiah, in particular Is 43.1 to 7. / O presente estudo exegético tem por objetivo demonstrar a face materna de Javé revelada nos textos de Dêutero-Isaías, tendo como fonte principal o oráculo de salvação de Is 43,1-7. Para tal, partimos da análise do contexto literário, histórico e religioso de Dêutero-Isaías, paraentão fazer a análise exegética do texto proposto, através da qual enfocaremos, dentre os diversos conteúdos, a característica materna apresentada na perícope. Compreendendo que um texto surge dentro de um ambiente social, evidenciaremos, com base nos escritos de Dêutero-Isaías, a comunidade exilada à qual se dirigem profetas e profetisas. Por fim, combinando os atributos maternos das deusas Asherah e Ishtar com a incipiente concepção materna de Javé apresentado por Oséias, propomos a face materna de Deus com base nos textos dêuteroisaiânicos, em especial, Is 43,1-7.

El objetivo de esta tesis es evaluar, los resultados de la implementación de un sistema ERP, Oracle Financial (Worldclass) en la empresa Minera Las Cenizas, de tamaño medio en su rubro. Los sistemas ERP “Enterprise Resource Planning”, son aplicaciones empresariales que integran el flujo de la información con la finalidad de mejorar los procesos relevantes de las áreas de la organización de una Compañía. La Gerencia General de la empresa, en el año 2002 toma la decisión de implementar una plataforma informática que le permitiera soportar adecuadamente sus procesos operacionales y transaccionales, con un sistema integral de gestión empresarial diseñado para modelar y automatizar la mayoría de los procesos de la empresa, con la misión de facilitar la planificación de todos los recursos. La metodología de la tesis fue un proceso de búsqueda de la información, entrevistas y reuniones a los principales actores de la implementación y usuarios, acompañado con un proceso descriptivo crítico. La solución planteada por la empresa implantadora como concepto era excelente, pero en la práctica fue compleja por la cultura y experiencia que tenía Las Cenizas y fue necesario realizar modificaciones y ajustes. Por una decisión interna de la Compañía, solo se implementó los módulos relacionados con las áreas de finanzas, abastecimiento y recursos humanos, los módulos relacionados con la gestión y mantención de equipos fueron postergada. Se realizó una comparación y diagnóstico entre la situación planificada y la implementada, identificando impactos, costos y beneficios, aquellos elementos que permitieron que se lograran cumplir los objetivos y aquellos que podrían haber atentado contra su éxito. Dentro de la comparación, se observa que la implementación de Oracle era necesaria, y se lograron avances en las áreas donde se implementó: eficiencia administrativa, calidad y seguridad de la información, control de inventarios, solicitudes y órdenes de compra en línea, etc. Con toda esta información se elaboraron propuestas y recomendaciones como aprovechar al máximo las potencialidades del ERP y sus funcionalidades, continuar con el desarrollo del proyecto con el objetivo de contar con un sistema de integración total de gestión. Además, para potenciar el uso del Oracle Financial, se requiere revisar los procesos y adecuarlos a través de una reingeniería de los procesos, replantear como las áreas están utilizando la aplicación. Las Cenizas deberán revisar los factores críticos de éxito, como son la planificación, el compromiso de la Gerencia General y la cultura de la Compañía, de forma de orientarlos a sus objetivos y visión de negocios y lograr los resultados esperados de recuperar la inversión del proyecto en menos de dos años y una mejora en la gestión de la Compañía. La Compañía ha ido adquiriendo conocimiento y maduración en el uso de las bondades de la aplicación, que cosas deben realizarse y cuales no, que sumado a las recomendaciones permiten que hoy se pueda dar un nuevo paso hacia la integración total del sistema de gestión.

The changing requirements in the modern labour market have led to a new form of economic geography of employment, where skills, wages and the uncertainty of employment play a primary role in the spatial division of labour. The main purpose of this project is to investigate the use of Geographical Information Systems (GIS) as a tool to illustrate employment and unemployment in Östergötland County for giving information on the development of the labour market. In addition, the use of GIS for population data analysis with the help of Oracle’s map viewer is closely examined. This descriptive thesis reveals that the labour market is characterized by the geographic extension of the market and its determination by how far the supply and demand forces go and the important role that GIS plays in illustrating the distribution of workforce in Östergötland’s labour market. GIS is an analytical tool for employer/employee demographics that can be used for visualization but also for analysis and pre-processing purposes with the use of graphic tools. With the use of thematic maps, GIS can visualise spatial data with labour data according to certain demographic criteria. GIS technology has ways of mapping thematically the local labour market demand and supply. In addition, it is capable of constructing a comprehensive workforce development system that can integrate the job seekers and employers. GIS can facilitate the development of visual web-based mapping systems that allow users to investigate and find employees within various industries.

Embedded systems are present in many fields of application where failure may be critical. Such systems often possess characteristics that hampers the testing activity, as large amount of produced data and temporal requirements which must be specified and evaluated. There are tools that support the development of models for analysis and simulation still in the design stage. After being evaluated, a model may be used as basis to the implementation. In this case, it is important to ensure that the model is consistent with the specification. Otherwise, a divergence will be propagated to the final code. Therefore, the model must be tested prior to the codification. Simulink is a standard development and simulation tool for models of embedded systems. Its wide application in the industry has promoted the creation of free-software alternatives, as XCos. In the literature, there are researches which seek to improve the testing activity for Simulink-like models. The proposed solutions usually focus on test case selection strategies. However, little efforts have been directed to the oracle problem, that is, the difficulty in evaluating if an execution agrees with the specification. The objective of this doctorate proposal is to provide an oracle generation approach for Simulink-like models which addresses the characteristics previously summarized. Specifically, it is proposed a process, methods, procedures and a tool that enable the partially-automated generation of oracles for such models. As a main contribution, it is expected an improvement in the evaluation process of embedded systems in terms of quality, cost and time / Sistemas embarcados estão presentes em diversas áreas de aplicação em que falhas podem ser críticas. Tais sistemas frequentemente possuem características que tornam a fase de teste particularmente desafiadora, como a produção de grande quantidade de dados e requisitos temporais que precisam ser validados de acordo com a especificação. Existem ferramentas que auxiliam no desenvolvimento de modelos para análise e simulação do comportamento de sistemas embarcados ainda na fase de design. Após ser avaliado, o modelo pode ser usado como base para a implementação. Neste caso, deve-se buscar garantir que um modelo esteja de acordo com a especificação. Do contrário, tal divergência será propagada para a implementação. Portanto, e importante que o modelo seja testado antes da fase de implementação. Simulink e uma ferramenta-padrão de desenvolvimento e simulação de modelos de sistemas embarcados. Sua ampla aplicação na indústria incentivou a criação de alternativas de software livres como XCos. Na literatura, existem pesquisas que visam a aprimorar a atividade de teste de modelos Simulink-like. As soluções propostas geralmente focam em estratégias de seleção de casos de teste. Mas pouco esforço tem sido direcionado ao problema do oráculo, isto e, na dificuldade em avaliar se a execução está de acordo com a especificação. O objetivo desta proposta de doutorado é prover uma abordagem de geração de oráculos de teste para modelos simulink-like que contemple as características previamente resumidas. Especificamente, é proposto um processo, métodos, procedimentos e uma ferramenta que viabilizem a geração parcialmente automatizada de oráculos de teste para modelos Simulink-like. Como contribuição principal, é esperada a melhora da qualidade, custo e tempo do processo de validação de sistemas embarcados suportados por modelagem em Simulink e ferramentas similares

CRM Treasury Systems AB is one of the Nordic Countries’ leading companies within treasury management. Their main product CRM Finance is a software program for financial administrators with roots back to the early 90s. Computer usage and software has changed considerably since then and the company is currently considering choosing a new technology to base future products upon. In this thesis Oracle ADF, Microsoft Lightswitch beta 1 and Silverlight with WCF RIA Services, are compared in order to select a suitable technology to base future applications on. The frameworks are used to implement a simple application with a small number of screens displaying database data in order to get to know the frameworks and capture the time required to get started. After the basic applications have been implemented in all the three frameworks and evaluated it is decided to continue by implementing a number of more advanced authorization and internationalization scenarios. It is decided to continue with only two of the selected frameworks due to lack of time once the simple application has been implemented successfully. Lightswitch beta 1 is chosen for discontinuation due to an uncertain future for the application as it is the first public available beta of the product. Based on the experience from the implementations performed, the time required for them as well as how the platforms fit the company’s requirements the .NET platform with Silverlight + WCF RIA Services is recommended as the base for future applications.

Les résultats obtenus dans cette thèse concernent l'estimation non paramétrique de densités de probabilité. Principalement, nous nous intéressons à estimer une densité de probabilité multidimensionnelle de régularité anisotrope et inhomogène. Nous proposons des procédures d'estimation qui sont adaptatives, non seulement par rapport aux paramètres de régularité, mais aussi par rapport à la structure d'indépendance de la densité de probabilité estimée. Cela nous permet de réduire l'influence de la dimension du domaine d'observation sur la qualité d'estimation et de faire en sorte que cette dernière soit la meilleure possible. Pour analyser la performance de nos méthodes nous adoptons le point de vue minimax et nous généralisons un critère d'optimalité pour l'estimation adaptative. L'utilisation du critère que nous proposons s'impose lorsque le paramètre d'intérêt est estimé en un point fixé car, dans ce cas, il y a un "prix à payer" pour l'adaptation par rapport à la régularité et à la structure d'indépendance. Cela n'est plus vrai lorsque l'estimation est globale. Dans le modèle de densité (avec des observations directes) nous considérons le problème de l'estimation ponctuelle et celui de l'estimation en norme $bL_p$, $pin[1,infty)$. Dans le modèle de déconvolution (avec des observations bruitées) nous étudions le problème de l'estimation en norme $bL_p$, $pin[1,infty]$, dans le cas où la fonction caractéristique du bruit décroît polynomialement à l'infini. Chaque estimateur que nous proposons est obtenu par une procédure de sélection aléatoire dans une famille d'estimateurs à noyau. / The results obtained in this thesis concern the non parametric estimation of probability densities. Primarily, we are interested in estimating a multivariate probability density which is anisotropic and inhomogeneous. We propose estimation procedures that enable us to take into account the regularity properties of the underlying probability density and its independence structure simultaneously. This allows us to reduce the influence of the dimension of the observation space on the accuracy of estimation and then to improve it. To analyze the performance of our methods we adopt the minimax point of view and we generalize a criterion of optimality for adaptive estimation. The use of the criterion we propose is necessary for estimation at a fixed point. Indeed, in this setting, there is a "penalty" for adaptation with respect to the regularity and to the independence structure. This is no longer true for global estimation. In the density model (with direct observations) we consider both the problem of pointwise estimation and the problem of estimation under $bL_p$-loss ($pin[1,infty)$). In the deconvolution model (with noisy observations) we study the problem of estimation with an $bL_p$-risk ($pin[1,infty]$) when the characteristic function of the noise decreases polynomially at infinity. Any estimator that we propose is obtained by a random selection procedure in a family of kernel estimators.

Diploma Thesis focuses on integrating Hadoop platform into current data warehouse architecture. In theoretical part, properties of Big Data are described together with their methods and processing models. Hadoop framework, its components and distributions are discussed. Moreover, compoments which enables end users, developers and analytics to access Hadoop cluster are described. Case study of batch data extraction from current data warehouse on Oracle platform with aid of Sqoop tool, their transformation in relational structures of Hive component and uploading them back to the original source is being discussed at practical part of thesis. Compression of data and efficiency of queries depending on various storage formats is also discussed. Quality and consistency of manipulated data is checked during all phases of the process. Fraction of practical part discusses ways of storing and capturing stream data. For this purposes tool Flume is used to capture stream data. Further this data are transformed in Pig tool. Purpose of implementing the process is to move part of data and its processing from current data warehouse to Hadoop cluster. Therefore process of integration of current data warehouse and Hortonworks Data Platform and its components, was designed