A convergência da Internet com outras redes (telefonia móvel e televisão digital), o surgimento da computação ubíqua e crescente demanda pela computação autônoma, tem favorecido a existência de um ambiente constantemente modificado e altamente dinâmico, caracterizado pelo tratamento e transporte de conteúdo multimídia, heterogeneidade nos recursos, tecnologias de redes e dispositivos de acesso. Este cenário tem exigido a existência de sistemas adaptativos, ou seja, que tenham a capacidade de se adaptar dinamicamente em resposta a mudanças no contexto em que estão inseridos. O projeto de software de sistemas adaptativos que visem atender de forma satisfatória evolução e mudança neste novo ambiente heterogêneo da Internet tem particular relevância e complexidade. Um dos principais desafios é realizar a implementação de comportamentos adaptativos sem entrelaçamento com outras funcionalidades da aplicação, que podem levar a dificuldade de legibilidade e prejudicar a manutenção do código. Este trabalho procura abordar este tema empregando programação orientada a aspectos na especificação e implementação de uma camada de adaptação que atua sobre aplicações multimídia em rede utilizando abordagens de adaptação baseados em servidor. Em particular, através do uso da linguagem AspectJ, é mostrado como promovemos a separação do interesse de adaptabilidade de forma modular para permitir que a camada de adaptação realize configuração estática e dinâmica de processos de transmissão de fluxos multimídia a partir de mecanismos de monitoração do seu ambiente de operação. / The convergence of the Internet with other networks (e.g. Mobile Telecom and Digital Television Networks), the ubiquitous computing raising and the increasing demand on the autonomic computing has favored the existence of a constantly modified and highly dynamic environment. It is characterized by the treatment and transport of multimedia content and resources, network technologies and access devices heterogeneity. This scenario has demanded the existence of adaptive systems, which has the capacity to dynamically adapt based on the context where they are inserted. The software design for adaptive systems, which aim to deal on a satisfactory way the evolution and changes in this new heterogeneous Internet environment, has particular relevance and complexity. One of the main challenges is performing the development of adaptive behaviors without tangled and scattered code along other application functionalities, which could result in code legibly problems, affecting its maintenance. The main purpose of this work is the specification and development of an adaptation layer working in multimedia networked application and using server based adaptation approach, making use of aspect oriented programming. Specifically, through the adoption of the AspectJ language it was showed how the adaptability concern was well modularized by enabling the adaptation layer to perform static and dynamic configuration of the multimedia chains through the monitoring of its operational environment.

abstract: Unmanned aerial vehicles (UAVs) are widely used in many applications because of their small size, great mobility and hover performance. This has been a consequence of the fast development of electronics, cheap lightweight flight controllers for accurate positioning and cameras. This thesis describes modeling, control and design of an oblique-cross-quadcopter platform for indoor-environments. One contribution of the work was the design of a new printed-circuit-board (PCB) flight controller (called MARK3). Key features/capabilities are as follows: (1) a Teensy 3.2 microcontroller with 168MHz overclock –used for communications, full-state estimation and inner-outer loop hierarchical rate-angle-speed-position control, (2) an on-board MEMS inertial-measurement-unit (IMU) which includes an LSM303D (3DOF-accelerometer and magnetometer), an L3GD20 (3DOF-gyroscope) and a BMP180 (barometer) for attitude estimation (barometer/magnetometer not used), (3) 6 pulse-width-modulator (PWM) output pins supports up to 6 rotors (4) 8 PWM input pins support up to 8-channel 2.4 GHz transmitter/receiver for manual control, (5) 2 5V servo extension outputs for other requirements (e.g. gimbals), (6) 2 universal-asynchronous-receiver-transmitter (UART) serial ports - used by flight controller to process data from Xbee; can be used for accepting outer-loop position commands from NVIDIA TX2 (future work), (7) 1 I2C-serial-protocol two-wire port for additional modules (used to read data from IMU at 400 Hz), (8) a 20-pin port for Xbee telemetry module connection; permits Xbee transceiver on desktop PC to send position/attitude commands to Xbee transceiver on quadcopter. The quadcopter platform consists of the new MARK3 PCB Flight Controller, an ATG-250 carbon-fiber frame (250 mm), a DJI Snail propulsion-system (brushless-three-phase-motor, electronic-speed-controller (ESC) and propeller), an HTC VIVE Tracker and RadioLink R9DS 9-Channel 2.4GHz Receiver. This platform is completely compatible with the HTC VIVE Tracking System (HVTS) which has 7ms latency, submillimeter accuracy and a much lower price compared to other millimeter-level tracking systems. The thesis describes nonlinear and linear modeling of the quadcopter’s 6DOF rigid-body dynamics and brushless-motor-actuator dynamics. These are used for hierarchical-classical-control-law development near hover. The HVTS was used to demonstrate precision hover-control and path-following. Simulation and measured flight-data are shown to be similar. This work provides a foundation for future precision multi-quadcopter formation-flight-control. / Dissertation/Thesis / Masters Thesis Electrical Engineering 2018

This thesis is classified as an internal experimental project whose aim is to design HW and low level SW of simplified version of the controller for TFE731 turbofan engine according to defined requirements. The expected outputs in addition to the system design is also information about possible technical problems and difficulties arising during the analysis and development of the system. The work covers a brief look into the history of aviation and avionics, theoretical analysis turbofan engine, analysis of measured and controlled variables. Based on the requirements analysis and I/O values is made circuit design (HW) and design of the low level control software.

Die jedes Frühjahr stattfindende »Dresdner Arbeitstagung Schaltungs- und Systementwurf« wird traditionell vom Fraunhofer-Institut für Integrierte Schaltungen, Institutsteil Entwurfsautomatisierung (EAS) und vom Sächsischen Arbeitskreis Informationstechnik des VDE Bezirksvereins Dresden ausgerichtet. Die Arbeitstagung hat bereits eine über 30-jährige Tradition und wird von Wissenschaftlern aus Forschungsinstituten und Ingenieuren aus der Industrie für einen regen fachlichen Austausch genutzt. Gegenstand der Tagung sind aktuelle Ergebnisse und neue Erkenntnisse aus Forschung und Entwicklung sowie Erfahrungsberichte und Problemdiskussionen auf dem Gebiet des Entwurfs analoger, digitaler und hybrider Systeme. Das Tagungsprogramm bietet den Teilnehmern wieder interessante Beiträge über neue Lösungen zum Entwurf komplexer Schaltungen und Systeme, die auch Themen wie Rekonfigurierbarkeit, Architekturen, Performance, Hardware-Software, Test und Optimierung behandeln. Begleitend zur Tagung wird von der Firma Mentor Graphics ein Workshop zum Thema »Advanced Verification Methodology« angeboten. Hier werden an einem Beispiel die Vorteile der zukünftigen Design Verifikation mit System Verilog und Assertions erläutert. Der vorliegende Tagungsband enthält die Langfassungen der Beiträge, für deren Form und Inhalt die Autoren verantwortlich sind. Als Veranstalter bedanken wir uns bei den Autoren für die Bereitstellung dieser Beiträge, die als Grundlage für die fachlichen Diskussionen dienen, und bei den Teilnehmern für ihr Interesse an unserer Arbeitstagung.

Heuristic Evaluation (HE) is a popular usability inspection method. Yet little is known about the effect the evaluators have on the outcome of HE. One potentially important feature of evaluators is their end-user status, that is, whether or not they are end-users for whom the interface is designed. I completed a detailed review of the HE literature, combined sources, developed an explicit method for conducting an HE and trained HE novices from different work domains using it. Using these methods I conducted a preliminary randomized crossover study (n=6) of the effect of end-user status during the inspection and merging stages of HE. I estimate a larger study of approximately 148 end-users would be needed to test hypotheses regarding end-user status. I demonstrated a novel measure of the effect of end-user status for the merging stage of HE, which I called the measure of matching similarity (MMS).

Heuristic Evaluation (HE) is a popular usability inspection method. Yet little is known about the effect the evaluators have on the outcome of HE. One potentially important feature of evaluators is their end-user status, that is, whether or not they are end-users for whom the interface is designed. I completed a detailed review of the HE literature, combined sources, developed an explicit method for conducting an HE and trained HE novices from different work domains using it. Using these methods I conducted a preliminary randomized crossover study (n=6) of the effect of end-user status during the inspection and merging stages of HE. I estimate a larger study of approximately 148 end-users would be needed to test hypotheses regarding end-user status. I demonstrated a novel measure of the effect of end-user status for the merging stage of HE, which I called the measure of matching similarity (MMS).

Game engine is a set of supporting tools and services for game development. It is a component designed for reuse in different games. Therefore it is very important for game engine to be designed properly as for any successfully used reusable component. The main objective in this research is to present flexible and easily extensible architectural solution suitable for the game engine, based on the analysis of today’s game engine context and existing software architecture design. During the analysis we reviewed different types of software architecture and its implementation methods, and defined functional requirements for game engine. As the result we have chosen data-driven architecture design as the most suitable for the engine development and created our game engine prototype. For each game engine module we have provided design solution and its implementation approach referring to chosen architecture.

Partizipative Softwaregestaltung zielt darauf ab, sowohl die Softwarequalität als auch die Kontrolle der NutzerInnen über die Gestaltung ihrer Arbeitssituation und -umgebung zu erhöhen. In diesem Beitrag diskutieren wir anhand der Erfahrungen, die wir mit der (Weiter-) Entwicklung einer Groupware für ein virtuelles Netzwerk von FreiberuflerInnen gesammelt haben, inwiefern und warum sich Vorgehensweisen der partizipativen Softwaregestaltung zur nachhaltigen Entwicklung virtueller Gemeinschaften eignen. Die vorgestellte Fallstudie verdeutlicht, welch wichtige Rolle die Wahl der Vorgehensmethodik für die Entfaltung virtueller Gemeinschaften spielt, wenn es darum geht, das nötige Verständnis und die Kooperationsbereitschaft bei sich ständig ändernden Anforderungen - vor allem auch auf organisatorischer Ebene - zu entwickeln.

[pt] Muitos problemas de modularidade de design de software estão relacionados à modularização inadequada de interesses importantes e que têm impacto sistêmico no design, tais como tratamento de exceção, distribuição e persistência. No entanto, a maioria das abordagens atuais de avaliação quantitativas não levam em conta os interesses que guiam o design, o que acaba fazendo com que o processo de avaliação de modularidade se torne deficiente. Portanto, existe a necessidade de abordagens de medição que promovam uma identificação mais efetiva dos problemas de modularidade relacionados a interesses transversais. Além disso, essa necessidade se torna ainda mais evidente à medida que surgem novas formas de decomposição de design, tais como desenvolvimento de software orientado a aspectos. Nesse contexto, essa tese tem o objetivo de definir e investigar uma nova abordagem de avaliação quantitativa de modularidade de design de software que promove o conceito de interesse a uma abstração de medição. Esse trabalho define uma abordagem de medição dirigida por interesse que inclui um conjunto de mecanismos para avaliação de modularidade de software desde o design arquitetural até o design detalhado. A abordagem sensível a interesse proposta é composta por: (i) um conjunto de métricas arquiteturais, (ii) um conjunto de métricas de design detalhado, (iii) um conjunto de regras heurísticas de design que dão apoio a interpretação das métricas, e (iv) uma ferramenta, chamada de COMET, que dá apoio tanto à notação quanto à medição dirigida por interesses de design arquitetural. A utilidade da técnica de medição dirigida por interesses proposta foi avaliada em uma série de estudos empíricos, onde a modularidade de designs convencionais e orientados a aspectos foram comparados. / [en] Several modularity problems in software designs are related to the inadequate modularization of key broadly-scoped concerns, such as exception handling, distribution, and persistence. However, most of the current quantitative assessment aproaches are not sensitive to concerns that drive the design, thereby leading to a number of shortcomings in the modularity evaluation process. Therefore, there is a need for measurement approaches that support a more effective identification of modularity anomalies related to crosscutting concerns. Also, this necessity becomes more apparent in an age that a number of different fomrs of design decompositions, such as aspect-oriented software development, are emerging. In this context, this thesis aims at investigating a novel approach for quantittative modularity assessment of software design by promoting the concept of concern as a measurement abstraction. Our concern-driven measurement approach encompasses a set of mechanisms for assessing software modularity from architectural to detailed design. The prposed concern-sensitive approach includes:(i) a suite of architectural metrics, (ii) a suite of detailed design metrics, (iii) a suite of design heuristic rules for supporting the interpretation of metrics in meaningful ways, and (iv) a tool, called COMET, that supports bots concern-drive notation and measurement of architectual designs. We evaluated the usefulness of our concern-oriented measurement techinique in a series of emprical studies, comparing the modularity of conventional and aspect-oriented software design.

Abstract Modern life has increasingly become intertwined with technology, and recent years have witnessed a growth in technologies that support people in, for instance, leading healthier and more sustainable lifestyles. At the centre of this growth has been persuasive systems design, which has been shown to have a positive effect on individuals’ behaviour and their use of systems. This dissertation consists of five studies, encompassing a literature review, two quantitative studies with a total of 227 respondents, and two constructive studies that address the central research question of the dissertation: How can integrating judgment and decision-making processes and persuasive software design patterns enhance the development of behaviour change support systems? The primary theoretical framework for the research is the Persuasive Systems Design model. This is a model that outlines the key requirements for developing persuasive systems, consisting of the theoretical underpinnings, persuasion context analysis, and four feature categories. In recent years, improving the design of persuasive systems to better achieve their intended objectives has been an important topic. This dissertation, in addition to examining the role of persuasive software features in influencing behaviour, also integrates behavioural economics and software design patterns into the design of persuasive systems. Additionally, the interplay between the categories and other constructs such as perceived competence is investigated through statistical analyses. Overall, results reveal that persuasive system features have an impact on the efficacy of behaviour change support systems. Additionally, integrating behavioural economics concepts that explain the reasons why individuals deviate from expected behaviour and software design patterns can help improve the development of persuasive systems and further enhance their efficacy. / Tiivistelmä Teknologia on yhä tiukemmin osa nykyelämää. Viime vuosina on tapahtunut kasvua ja kehitystä teknologioissa, jotka tukevat ihmisiä esimerkiksi elämään terveellisemmin ja ympäristöä säästäen. Tämän kasvun keskiössä on ollut vakuuttavien järjestelmien suunnittelu, jonka on osoitettu vaikuttavan positiivisesti sekä ihmisten käyttäytymiseen että järjestelmien käyttöön. Tämä väitöskirja käsittää viisi tutkimusta, sisältäen kirjallisuuskatsauksen, kaksi kvantitatiivista tutkimusta yhteensä 227 vastaajalla, ja kaksi konstruktiivista tutkimusta, jotka yhdessä vastaavat väitöskirjan päätutkimuskysymykseen: Kuinka arviointi- ja päätöksentekoprosessit sekä vakuuttavien järjestelmien suunnittelumallit yhdistämällä voidaan edistää käyttäytymisen muutosta tukevien järjestelmien kehitystä? Ensisijainen teoreettinen viitekehys tutkimukselle on vakuuttavien järjestelmien suunnittelumalli (Persuasive Systems Design model). Kyseinen malli määrittää keskeiset vaatimukset vakuuttavien järjestelmien kehittämiselle. Tärkeänä aiheena on ollut vakuuttavien järjestelmien suunnittelemisen edistäminen, jotta niillä voitaisiin paremmin saavuttaa aiotut päämäärät. Vakuuttavien järjestelmien ohjelmisto-ominaisuuksien vaikutuksesta käyttäytymiseen tutkimisen lisäksi väitöskirja yhdistää myös behavioristisen taloustieteen ja ohjelmistosuunnittelumallit vakuuttavien järjestelmien suunnitteluun. Lisäksi kategorioiden ja muiden käsitteiden, kuten koetun pätevyyden, vuorovaikutusta on tutkittu tilastollisen analyysin keinoin. Kaiken kaikkiaan tulokset paljastavat vakuuttavien järjestelmien ominaisuuksilla olevan vaikutusta käyttäytymisen muutosta tukevien järjestelmien vaikuttavuuteen. Lisäksi integroimalla behavioristisen taloustieteen konsepteja, jotka selittävät syitä, joiden vuoksi yksilöt käyttäytyvät odotetusta poikkeavasti, ohjelmistosuunnittelumalleihin, voidaan auttaa edistämään vakuuttavien järjestelmien kehittämistä ja parantaa niiden vaikuttavuutta.