Submitted by Renata Lopes (renatasil82@gmail.com) on 2017-06-07T15:13:04Z No. of bitstreams: 1 jacimarfernandestavares.pdf: 4117614 bytes, checksum: 6d7763e08f1653c32b20373c9e55ec2b (MD5) / Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-06-24T13:08:28Z (GMT) No. of bitstreams: 1 jacimarfernandestavares.pdf: 4117614 bytes, checksum: 6d7763e08f1653c32b20373c9e55ec2b (MD5) / Made available in DSpace on 2017-06-24T13:08:28Z (GMT). No. of bitstreams: 1 jacimarfernandestavares.pdf: 4117614 bytes, checksum: 6d7763e08f1653c32b20373c9e55ec2b (MD5) Previous issue date: 2015-03-16 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Existem diversas tecnologias desenvolvidas nas áreas de manutenção e evolução colaborativa de software associadas à visualização de software, objetivando resolver problemas de empresas e grupos de usuários. Em muitos casos é necessário integrar soluções dessas áreas visando resolver um dado problema relacionado à evolução do software. Este problema se torna mais intenso quando se trata de equipes geograficamente distribuídas. Neste sentido, foi desenvolvida GiveMe Infra, uma infraestrutura para apoio a realização de atividades de manutenção e evolução de software, realizadas por equipes co-localizadas ou geograficamente distribuídas. Tais atividades são apoiadas por diferentes visualizações de software que permitem ao usuário obter diferentes perspectivas sobre as informações disponibilizadas. Um estudo experimental foi realizado objetivando verificar a viabilidade de uso da solução. Os resultados obtidos são apresentados, bem como os trabalhos futuros em relação à infraestrutura proposta. / There are several technologies developed to support collaborative software maintenance and evolution, as well as software visualization, in order to solve problems of companies and group of users. In many cases is necessary to integrate solutions already available in these areas to solve a given problem. These problems become intense when geographically dispersed groups are involved in software maintenance and evolution activities. In this sense, an infrastructure, named GiveMe Infra, was developed to support these activities when performed by co-located or geographically distributed teams. These activities are supported by different software visualizations that allow the user get different perspectives about the provided information. An experimental study were carried out aiming to verify the feasibility of the solution as well as the hypotheses. The obtained results related to the experiments and future works are presented.

Mjukvaruutveckling är en komplicerad uppgift och olika visualiseringstekniker har genom åren använts för att underlätta förståelsen och underhållbarheten av mjukvara. I detta arbete har en prototyp tagits fram för att underlätta navigering och förståelse för mjukvarukomponenter i utvecklingsverktyget Arctic Studio. En intervju- baserad användarundersökning användes för att förstå aktuella brister med nuvarande presentationsmönster i Arctic studio och ta reda på hur användarna arbetar med verktyget. Prototypens design baserades på resultatet av användarundersökningen. Den slutgiltiga prototypen bestod utav tre delar. Ett polärdiagram för att visa komponenter och dess grannar, en matrisbaserad visualisering för att visa en vald komponents portar och dess kopplingar samt en riktad trädgraf för att visualisera hur information propagerar genom systemet. Den framtagna prototypen evaluerades med hjälp av kognitiva genomgångar med interna utvecklare. / Software development is a complicated task and different visualisation techniques have been used during the years to facilitate understandability and maintenance in software systems. In this thesis a proof of concept has been developed to augment navigation and understandability for software components in the integrated software development environment Arctic Studio. An interview based user survey was conducted to identify issues with the current environment in Arctic Studio, and to find out current usage patterns in the user base. The design of the prototype was based on the result of the user survey. The final prototype consisted of three parts. A radian diagram was used to provide a neighbourhood view for the different compositions of the system, a matrix based visualisation complemented this view to show a selected components ports and connections. The last part consisted of a directed tree graph to visualize the connection hierarchy for a selected port. The prototype was then evaluated using a cognitive walkthrough with internal developers.

In software visualization, but also in information visualization in general, there is a great need for evaluation of visualization metaphors. To reduce the amount of empirical studies a omputational approach has been applied successfully, e.g., to graph visualization. It is based on measurable aesthetic heuristics that are used to estimate the human perception and the processing of visualizations. This paper lays a foundation for adopting this approach to any field of information visualization by providing a method, the repertory grid technique, to identify aesthetics that are measurable, metaphor-specific, and relevant to the user in a structured and repeatable way. We identified 25 unique aesthetics and revealed that the visual appearance of the investigated visualizations is mainly influenced by the package structure whereby methods are underrepresented. These findings were used to improve existing visualizations.

Digital technology is developing rapidly, and educators are currently in the process of exploring what opportunities new technology can have for learning and teaching. This applies not least to the field of education in programming, as   learning to program is a great challenge for many students. Therefore, educators and researchers have sought to find educationally effective digital learning resources to facilitate the programming learning process. In this thesis, multimodal online learning environments, providing accessible and learner-focused learning activities, and multimodal software visualizations, striving at concretizing the abstract building blocks in programming languages, were exploratory investigated. The aim was to expand the understanding of how digital learning resources can be used to support students’ understanding of basic programming concepts and dynamics. Empirical studies were conducted at the Department of Computer and Systems Sciences (DSV) at Stockholm University, Sweden. The data were collected during introductory programming courses in which the author had an active role as designer of the software visualizations, teacher and researcher. In these courses, the digital learning resources were explored as additional course resources. The research was conducted both through field experiments and case studies and data was collected using questionnaires, interviews and group discussions. Results strengthened the claims that abstract phenomena like programming can be made visible and understandable through visualization, in particular program dynamics.  When visualizations illustrated more conceptual elements, further guidance was required, to facilitate students’ interpretation and understanding. Regarding the online learning environments, guiding to the right learning pathways was the most critical factor found from the results. When adequate instructions and feedback were lacking in the learning environments, users became cognitively overloaded and disoriented. Finally, findings in all compiled studies indicate that teacher planning and orchestration of the learning situations should be conducted with more reflection.

No description available.

Nous proposons une approche qui génère des scénarios de visualisation à partir des descriptions de tâches d'analyse de code. La dérivation de scénario est considérée comme un processus d'optimisation. Dans ce contexte, nous évaluons différentes possibilités d'utilisation d'un outil de visualisation donnée pour effectuer la tâche d'analyse, et sélectionnons le scénario qui nécessite le moins d'effort d'analyste. Notre approche a été appliquée avec succès à diverses tâches d'analyse telles que la détection des défauts de conception. / We propose an approach that derives interactive visualization scenarios from descriptions of code analysis tasks. The scenario derivation is treated as an optimization process. In this context, we evaluate different possibilities of using a given visualization tool to perform the analysis task, and select the scenario that requires the least effort from the analyst. Our approach was applied successfully to various analysis tasks such as design defect detection and feature location.

Complex software systems are difficult to understand and very hard to debug. Programmers trying to understand or debug these systems must read through source code which may span over thousands of files. Software Visualization tries to ease this burden by using graphics and animation to convey important information about the program to the user, which may be used either for understanding the behavior of the program or for detecting any defects within the code. SoftViz is one such software visualization system, developed by Ben Kurtz under the guidance of Prof. George T. Heineman at WPI. We carry forward the work initiated with SoftViz. Our preliminary study showed various avenues for making the system more effective and user-friendly. Specifically I completed the unfinished work, made optimizations, implemented new functionality and added new visualization plug-ins, all aimed at making the system a more versatile and user-friendly debugging framework. We built a solid core functionality that would be able to support various functionalities and created new plug-ins that would make understanding and bug-detection easier. Further we integrated SoftViz with the Eclipse development environment, making the system easily accessible and potentially widely used. We created an error classification framework relating the common error classes and the visualizations that could be used to detect them. We believe this will be helpful in both selecting the right visualization options as well as constructing new plug-ins.

<p>This project presents the research on software visualization techniques. We will introduce the concepts of software visualization, software metrics and our proposed visualization techniques: Static Visualization (glyphs object with static texture) and Dynamic Visualization (glyphs object with moving object). Our intent to study the existing visualization techniques for visualization of software</p><p>metrics and then proposed the new visualization approach that is more time efficient and easy to perceive by viewer. In this project, we focus on the practical aspects of visualization of multivariate dataset. This project also gives an implementation of proposed visualization techniques of software metrics. In this research based work, we have to compare practically the proposed visualization approaches. We will discuss the software development life cycle of our proposed visualization system, and we will also describe the complete software implementation of implemented software.</p>

De nos jours, les logiciels doivent continuellement évoluer et intégrer toujours plus de fonctionnalités pour ne pas devenir obsolètes. C'est pourquoi, la maintenance représente plus de 60% du coût d'un logiciel. Pour réduire les coûts de programmation, les fonctionnalités sont programmées plus rapidement, ce qui induit inévitablement une baisse de qualité. Comprendre l’évolution du logiciel est donc devenu nécessaire pour garantir un bon niveau de qualité et retarder le dépérissement du code. En analysant à la fois les données sur l’évolution du code contenues dans un système de gestion de versions et les données quantitatives que nous pouvons déduire du code, nous sommes en mesure de mieux comprendre l'évolution du logiciel. Cependant, la quantité de données générées par une telle analyse est trop importante pour être étudiées manuellement et les méthodes d’analyses automatiques sont peu précises. Dans ce mémoire, nous proposons d'analyser ces données avec une méthode semi automatique : la visualisation. Eyes Of Darwin, notre système de visualisation en 3D, utilise une métaphore avec des quartiers et des bâtiments d'une ville pour visualiser toute l'évolution du logiciel sur une seule vue. De plus, il intègre un système de réduction de l'occlusion qui transforme l'écran de l'utilisateur en une fenêtre ouverte sur la scène en 3D qu'il affiche. Pour finir, ce mémoire présente une étude exploratoire qui valide notre approche. / Software must continuously evolve and integrate more functionalities to remain useful. Consequently, more than 60% of a software system's cost is related to maintenance. To reduce this cost, programming must performed faster, witch leads to a decrease of the system code's quality. Therefore, understanding software evolution is becoming a necessity to prevent code decay and to increase the system life span. To ease software understanding, we perform a cross analysis of the historical data extracted from a version control system, with quantitative data that we obtain from the source code. However, the significant amount of data generated by this kind of analysis makes it necessary to have tools to support the maintainer’s analysis. First, tools help because examining them manually is impossible. Second, they help because automatics methods are not accurate enough. We present a new semiautomatic approach to help analysis. Our 3D visualization system, Eyes Of Darwin, uses a cityscape metaphor to show software's evolution on a single view. It integrates an occlusion reduction system, witch turns the screen to an open window on the 3D world. We conclude, with an exploratory study in order to validate our approach.

Statische Codemetriken sind wichtige Indikatoren für die Qualität eines Softwaresystems. Sie beleuchten dabei unterschiedliche Aspekte eines Softwaresystems. Deshalb ist es notwendig, mehrere Codemetriken zu nutzen, um die Qualität eines Softwaresystems in seiner Gesamtheit bewerten zu können. Wünschenswert wäre zudem eine Darstellung, die die Struktur des Gesamtsystems und die Bewertung einzelner Elemente eines Softwaresystems in einer Darstellung kombiniert. Die Arbeit untersucht deshalb, welche Metaphern geeignet sind, um eine solche Darstellung zu ermöglichen. Ein zweites Ziel der Arbeit war es, eine solche Visualisierung automatisch erzeugen zu können. Dafür wurde ein Generator entwickelt, der diese Anforderung erfüllt. Zur Konzeption dieses Generators kamen Techniken aus der generativen Softwareentwicklung zum Einsatz. Bei der Umsetzung des Generators wurde auf Techniken aus der modellgetriebenen Softwareentwicklung zurückgegriffen, vor allem auf Techniken aus dem openArchitectureWare-Framework. Der Generator kann in Eclipse eingebunden werden und ist in der Lage, aus einem Java-Projekt die Struktur und die Metrikwerte automatisch zu extrahieren. Diese Werte werden daraufhin in ein dreidimensionales Modell überführt, das auf dem offenen Extensible 3D Standard basiert. Der Generator ermöglichte zudem die Evaluierung zweier unterschiedlicher Metaphern, die im Rahmen der Arbeit durchgeführt wurde.