Made available in DSpace on 2014-12-17T14:54:50Z (GMT). No. of bitstreams: 1 CaioDC.pdf: 2782026 bytes, checksum: ffc0e89b5e796daecc6152d3075b6918 (MD5) Previous issue date: 2008-01-24 / The so-called Dual Mode Adaptive Robust Control (DMARC) is proposed. The DMARC is a control strategy which interpolates the Model Reference Adaptive Control (MRAC) and the Variable Structure Model Reference Adaptive Control (VS-MRAC). The main idea is to incorporate the transient performance advantages of the VS-MRAC controller with the smoothness control signal in steady-state of the MRAC controller. Two basic algorithms are developed for the DMARC controller. In the first algorithm the controller's adjustment is made, in real time, through the variation of a parameter in the adaptation law. In the second algorithm the control law is generated, using fuzzy logic with Takagi-Sugeno s model, to obtain a combination of the MRAC and VS-MRAC control laws. In both cases, the combined control structure is shown to be robust to the parametric uncertainties and external disturbances, with a fast transient performance, practically without oscillations, and a smoothness steady-state control signal / Neste trabalho ? apresentada uma proposta de um controlador, denominado Controlador em Modo Dual Adaptativo Robusto (DMARC), que estabelece uma liga??o entre um controlador adaptativo por modelo de refer?ncia (MRAC) e um controlador adaptativo por modelo de refer?ncia e estrutura vari?vel (VS-MRAC). A id?ia b?sica ? incorporar as vantagens de desempenho transit?rio do controlador VS-MRAC com as propriedades de regime permanente do controlador MRAC convencional. S?o desenvolvidos dois algoritmos b?sicos para o controlador DMARC. No primeiro o ajuste do controlador ? feito, em tempo real, atrav?s da varia??o de um par?metro na lei de adapta??o. No segundo algoritmo a lei de controle ? gerada, utilizando o modelo Takagi-Sugeno da l?gica nebulosa, para obter uma composi??o ponderada das leis de controle do MRAC e do VS-MRAC. Em ambos os casos, o esquema combinado de controle ? mostrado ser robusto ?s incertezas param?tricas e perturba??es externas, al?m de apresentar um desempenho r?pido e pouco oscilat?rio durante o transit?rio e um sinal de controle suave em regime permanente

A crescente procura por software de qualidade vem causando grande pressão sobre as empresas que trabalham com desenvolvimento de software. As entregas de produtos de software dentro do prazo e custo previstos vêm se tornando, a cada dia, um diferencial importante nesse ramo de atividade. Nesse sentido, as empresas procuram por metodologias que propiciem o desenvolvimento de produtos com qualidade, e que respeitem o custo e prazo previstos. Em resposta a essas necessidades, surgiu uma nova classe de metodologias de desenvolvimento de software, conhecidas como metodologias ágeis. Este trabalho apresenta um estudo realizado sobre as principais características existentes nessa nova classe de metodologias. Uma análise permitiu a identificação de semelhanças e diferenças existentes entre elas, o que possibilitou a criação de um modelo de referência para o desenvolvimento ágil de software. O modelo foi utilizado em uma avaliação de processo baseada no modelo de avaliação da ISO/IEC 15504. A avaliação permitiu a identificação de forças e fraquezas no processo avaliado e possibilitou a definição de ações de melhoria para que o processo avaliado se assemelhasse à um processo de desenvolvimento ágil. Palavra-chave: Metodologia ágil de desenvolvimento. Modelo de referência. Processo de desenvolvimento de software. Avaliação de processo de software / The vast demand for software with quality is causing a great pressure on the companies which work with software development. The delivery of software products within the schedule and cost is becoming, every day, an important issue in this area. Therefore, companies are seeking for methodologies to develop products with quality, within the timetable and the cost. Considering these needs, it became a new class of software development methodologies, known as agile methodologies. This research shows a work done upon the main existing characteristics in this new class of methodologies. An analysis allowed the identification of the existing similarities and differences among them, which it made possible to create a new reference model for agile software development. The agile model was used in process assessment based on assessment model from ISO/IEC 15504. The assessment alowed a identification of power and weakness on the process and alowed a definition of improvement action to the process with the intention of to approach the agile development process

A evolução das ferramentas computacionais, aliada à tecnologia da informação (TI) e ao ambiente web possibilitam a realização de projetos colaborativos, com maior integração de procedimentos, visando à comunicação, à coordenação e à cooperação da equipe multidisciplinar. O estudo de caso, realizado para o projeto de produto edificação, foi desenvolvido com a aplicação de um questionário nos escritórios de projeto em Porto Alegre e apontou para uma situação diversa da efetiva utilização destas ferramentas. O desafio do trabalho está no fato de se estabelecer os requisitos das equipes de projeto, para o desenvolvimento de um sistema de gestão do conhecimento, com a utilização da estrutura de metadados para conceber um mecanismo de busca das informações. O desenvolvimento do processo de investigação apresentou a influência da TI no setor de projetos; a adoção de um modelo de referência para gerenciamento do processo de projeto integrado de edificações (GPPIE) e a possibilidade de integração eficaz com um SGBD. / The evolution of computational tools, along with information technology (IT) and the web environment allow for collaborative projects, with a greater integration of procedures for communication, coordination and cooperation of the multidisciplinary team. The case study was conducted for the building design product, was developed with a questionnaire in the design offices in Porto Alegre, and pointed to a situation different from the effective use of these tools. The challenge of the work is to establish the requirements of the design team, developing a management system of Knowledge, using the metadata structure designing a search engine information. The development of the research showed the influence of IT in the design, the adoption of a reference model for building integrated design process management (BIDPM) and the possibility of effective combination with a DBMS.

Cette thèse s'intéresse à l'adaptation des lois de pilotage d'un avion de transport civil aux différentes incertitudes qui peuvent affecter sa dynamique. Le procédé de pilotage adaptatif est censé fonctionner en temps réel à bord de l'avion afin d'optimiser la performance boucle fermée en fonction des conditions dans lesquelles il évolue. Les incertitudes peuvent être liées à la méconnaissance des conditions de vol (par exemple la vitesse et l'altitude), à des non-linéarités aérodynamiques inconnues ou encore à la méconnaissance du pilote aux commandes. Les procédés adaptatifs qui répondent à ces problèmes se doivent d'être performants sur l'ensemble du domaine opérationnel de l'avion en présence de perturbations réalistes. D'autres contraintes spécifiques peuvent être ajoutées en fonction du contexte (par exemple des charges limites, la stabilité aéroélastique, etc.). Plusieurs méthodes adaptatives sont testées afin d'adapter le système aux larges incertitudes qui le composent. Elles associent en général un estimateur en ligne (aussi appelé loi de mise-à-jour) à une loi de commande structurée. La synthèse de ces deux éléments peut être réalisée simultanément pour les méthodes adaptatives dites " directes ", comme par exemple le Model Reference Adaptative Control qui utilise la stabilité au sens de Lyapounov. Mais cette synthèse peut aussi être découplée pour les méthodes adaptatives dites "indirectes", ce qui offre un large choix de techniques pour chaque élément (comme les Moindres Carrés pour l'estimation de paramètres physiques incertains et la synthèse sous forme LFR pour le correcteur). Le choix de la méthode dépend fortement du contexte applicatif et des nombreuses contraintes associées. Trois applications sont au cœur de ce mémoire. Elles traitent de l'ajustement de lois de guidage à un modèle pilote inconnu, du contrôle longitudinal de non-linéarités de l'avion, et de la mise au point de lois longitudinale et latérale de pilotage manuel qui s'adaptent à des conditions de vol inconnues. Des méthodes avancées d'analyse linéaire et non-linéaire (dérivées de la µ-analyse et d'algorithmes d'optimisation) sont aussi mises en place pour valider ces systèmes sophistiqués adaptatifs en temps réel. D'une façon générale, les méthodes adaptatives indirectes ont donné le plus de satisfaction. Leur performance est aussi bonne que celle des méthodes directes, mais le fait qu'elles estiment en ligne des paramètres physiques facilite la surveillance temps réel du procédé adaptatif et sa validation. / This thesis deals with adapting flight control laws of a civil transport aircraft to various incertainties which can affect its behaviour. The adaptive flight control system is supposed to run in real time onboard the airplane so that its closed-loop performance is optimized with respect to the current conditions. These incertainties may be linked to unknown flight conditions (e.g. unknown airspeed and altitude), or unknown aerodynamics non-linearities or even unknown behaviour of the pilot in command. The adaptive schemes that are derived to answer these problems must be valid on the whole flight envelope with realistic disturbances but other additional contraints may exist depending on the context (e.g. loads limits, aeroelastic stability, etc.). To accommodate for large uncertainties on the system, adaptive methods are investigated. They usually combine an online estimator (also called an update law) with a structured flight control law. The synthesis of both elements may be simultaneous on 'direct' adaptive methods, e.g. on Model Reference Adaptive Control, using Lyapunov's stability theory. But it can also be decoupled on 'indirect' adaptive methods, giving a full spectrum of techniques for both elements (such as Least-Squares for estimating unknown physical parameters and the LFR framework for designing controllers). The choice of a specific method really depends on the application context and the related constraints.Three applications are the core of this report. They deal with adjusting guidance law to the pilot's unknown behaviour, controlling a longitudinal non-linearity, and providing manual longitudinal and lateral flight control laws which adapt to unknown flight conditions. Advanced linear and non-linear analysis techniques (based on µ-analysis or on optimization algorithms) are also applied to validated these sophisticated real-time adaptive systems. Results showed that indirect adaptive schemes were generally the most satisfactory. Their performance is similar to the one of direct schemes but as indirect methods provide physical parameter estimates, real-time monitoring and offline validation seem quite easier.

The thesis is focused on ECM and its representation in the reference model of IT management MBI. The main objective is to extend the aforementioned model with objects associated with the ECM - factors describing the structure of solutions, tasks defining the procedure for its implementation and the links between them and existing objects. The thesis analyzes in detail the benefits, but also the risks and problems associated with solution implementation. The methodology provides a set of best practices for the implementation of ECM.

The increasing volume of biological data requires finding new ways to save these data in genetic banks. The target of this work is design and implementation of a novel algorithm for compression of DNA sequences. The algorithm is based on aligning DNA sequences agains a reference sequence and storing only diferencies between sequence and reference model. The work contains basic prerequisities from molecular biology which are needed for understanding of algorithm details. Next aligment algorithms and common compress schemes suitable for storing of diferencies agains reference sequence are described. The work continues with a description of implementation, which is follewed by derivation of time and space complexity and comparison with common compression algorithms. Further continuation of this thesis is discussed in conclusion.

Konzeptuelle Modelle sind zur Gestaltung und Steuerung von Informationssystemen ein akzeptiertes und weit verbreitetes Instrument. Sie werden sowohl zur Gestaltung der Organisationsstruktur als auch zur Entwicklung der unterstützenden IT-Systeme verwendet. Für diesen Aufgabenbereich existiert eine hohe Nachfrage nach externer Unterstützung, da spezifische Fachkenntnisse und Erfahrungen notwendig sind. In diesem Zusammenhang werden seit Jahrzehnten Ansätze zur Wiederverwendung in Wissenschaft und Praxis diskutiert. Die Akzeptanz und Verbreitung von explizit zur Wiederverwendung konstruierten Modellen (Referenzmodelle) bleiben jedoch deutlich hinter den Erwartungen zurück. Die vorliegende Arbeit trägt zur Untersuchung möglicher Ursachen für den ausbleibenden Erfolg von Referenzmodellen bei. Der Forschung liegt die Vermutung zugrunde, dass die Potentiale von Referenzmodellen nicht zufriedenstellend ausgeschöpft werden können, weil die existierenden bzw. verwendeten Modellierungsmethoden die theoretischen Anforderungen an die Wiederverwendung von modellhaft dargestellten Lösungen zur Unternehmensgestaltung nicht erfüllen. Die vorliegende Arbeit fasst neun Einzelpublikationen zum Themenbereich Evolutionäre Referenzmodelle zu einer kumulativen Dissertation zusammen. Es werden in einem argumentativdeduktiven Verfahren konstruktivistische Theorien zur systematischen Weiterentwicklung und Wiederverwendung konzeptueller Unternehmensmodelle untersucht. Die auf dieseWeise resultierende Erweiterung der allgemeinen Modelltheorie wurde ihrerseits argumentativ-konzeptionell mit Hilfe von semiformalen Argumentationsmodellen aufbereitet. Im Ergebnis werden ein theoretisches Rahmenwerk zur evolutionären Referenzmodellierung präsentiert und 23 konzeptionelle Anforderungen definiert, die eine gezielte Methodenentwicklung für die evolutionäre Referenzmodellierung steuern sollen.

En la actualidad, los centros de salud tales como hospitales y clínicas necesitan guías específicas que ayuden en la creación de controles para administrar y salvaguardar la confidencialidad, disponibilidad e integridad de la información de sus sistemas. En consecuencia, se utiliza como guía la ISO/IEC 27002 que sirve para la administración de la información que cuenta con controles generales que pueden ser tomados como ejemplo. Sin embargo, ante la necesidad de aplicar controles específicos en el sector salud, se creó la ISO/IEC 27799 que tiene con objetivo brindar controles de seguridad para proteger la información personal (pacientes) en cuanto a los temas de salud. Este proyecto consiste en implementar un modelo de referencia para entidades del sector salud que permita gestionar la seguridad de los datos sensibles y confidenciales soportado en una plataforma Blockchain integrando la norma ISO/IEC 27799. Además, para el sector salud tienen que cumplirse los principios fundamentales de seguridad de la información, si uno de ellos se incumple, podría traer repercusiones negativas hacia el paciente. Los resultados obtenidos indican que al utilizar la tecnología Blockchain, los datos de salud de los pacientes están mejor resguardados ante cualquier incidente como por ejemplo un Ciberataque o manipulación mal intencionada de datos. Se espera que nuestro modelo de referencia ayude en la gestión de la seguridad de datos de salud en los hospitales y clínicas, con el fin de reducir el impacto de riesgos encontrados durante el proceso de validación. / Currently, health centers such as hospitals and needs need specific guidelines that help in creating controls to manage and safeguard the confidentiality, availability, and integrity of the information in their systems. Consequently, ISO / IEC 27002 is used as a guide, which is used for the management of information that has general controls that can be taken as an example. However, given the need to apply specific controls in the health sector, ISO / IEC 27799 was created, which aims to provide security controls to protect personal information (patients) regarding health issues. This project consists of implementing a reference model for entities in the health sector that allows managing the security of sensitive and confidential data supported on a Blockchain platform integrating the ISO / IEC 27799 standard. In addition, the three principles must be met for the health sector basic information security, if one of them is breached, it could have negative repercussions for the patient. The results obtained indicate that by using Blockchain technology, patients' health data is better protected against any incident such as a cyber-attack or malicious manipulation of data. Our reference model is expected to assist in the management of health data security in hospitals and clinics, in order to reduce the impact of risks found during the validation process. / Tesis

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