Stuttgart, Univ., Fakultät Informatik, Diplomarb., 1997.

Tese de mestrado integrado. Engenharia Civil (especialização em Estruturas). Faculdade de Engenharia. Universidade do Porto. 2008

Stuttgart, Univ., Fakultät Informatik, Diplomarb., 1997.

Thesis (M.Sc.)--York University, 2004. Graduate Programme in Computer Science. / Typescript. Includes bibliographical references (leaves 134-136). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://wwwlib.umi.com/cr/yorku/fullcit?pMQ99309

En bientôt quarante ans de recherche, de nombreuses connaissances ont été acquises sur la géologie des champs hydrothermaux, la chimie des fluides qui en réchappent et l’écologie des communautés qui les habitent. Celles-ci s’organisent en assemblages denses, distribués le long de la zone de dilution du fluide hydrothermal dans l’eau de mer, et dominés visuellement par une poignée d’espèces. La forte variabilité spatio-temporelle du fluide hydrothermal a une forte influence sur la distribution des communautés. Cependant, les mécanismes à l’origine de la réponse de la faune à cette variabilité sont peu compris. Pour cela, une approche modélisatrice est présentée. Les données collectées pendant plus de 20 ans sur l’édifice Tour Eiffel, sur le champ hydrothermal Lucky Strike (ride médio-Atlantique) ont été intégrées afin d’en extraire les composantes principales. L’étude intégrative des biomasses sur l’édifice montre que celles-ci sont largement dominées par la modiole Bathymodiolus azoricus. Ce bivalve est susceptible d’avoir une influence importante sur le fonctionnement de l’écosystème, et fait donc l’objet d’un premier modèle. La recherche de données pour le contraindre ont mené à mesurer des taux métaboliques in situ. Une fois le modèle paramétré, le modèle a fourni des estimations de flux encore inconnu. La simulation d’interruption du flux hydrothermal a fourni des indices sur la réponse de la modiole à la variabilité de son environnement. / In nearly forty years of research, significant insights have been gained on vent field geology, on the chemistry of emitted fluid and on the ecology of the communities inhabiting hydrothermal ecosystems. The fauna forms dense assemblages, distributed along the hydrothermal fluid/sea water mixing gradient, and visually dominated only by a few species. The high spatio-temporal variability of the hydrothermal fluid has a strong influence on species distribution. However, the mechanisms determining the species response to this variability is still poorly understood. In order to investigate this issue, a modelling approach is presented. Data collected for more than 20 years on the Eiffel Tower edifice, on the Lucky Strike vent filed (Mid-Atlantic Ridge) were integrated in order to identify meaningful elements for our problem. An integrative study of the faunal biomasses on the edifice showed that these are dominated by the mussel Bathymodiolus azoricus. This bivalve is likely to have a significant influence on the ecosystem functioning and is thus the object of a first model. The search for data to constrain it led to the measurement of in situ metabolic rates. Once parametrized, the model provided quantitative estimates of unknown fluxes. The simulation of hydrothermal flow interruption provided some insights on the mussel biomass response to its environment variability.

Deciding which database management system (DBMS) to use has perhaps never been harder. In recent years there has been an explosive growth of new types of database management systems that address different issues and performs well for different scenarios. This thesis is an improving case study of an Event Persistence Solution for the Eiffel Framework, which is a framework used for achieving traceability in very-large-scale systems development. The purpose of this thesis is to investigate whether it is possible to improve the performance of the Eiffel Event Persistence Solution by changing from MongoDB, to Elasticsearch or ArangoDB. Experiments were conducted to measure the request throughput for 4 types of requests. As a prerequisite to measuring the performance, support for the different DBMSs and the possibility to change between them was implemented. The results showed that Elasticsearch performed better than MongoDB in terms of nested-document-search as well as for graph-traversal operations. ArangoDB had even better performance for graph-traversal operations but had an inadequate performance for nested-document-search. / 决定使用哪个数据库管理系统（DBMS）可能从未如此困难过。近年来，新型数据库管理系统呈现爆炸式增长，它们解决了不同的问题，并在不同的情境中表现出优异性能。本论文是针对Eiffel框架的事件持久性解决方案的改进案例研究，该框架被用于实现超大规模系统开发中的可追溯性。本文的目的是研究是否可以通过摒弃MongoDB并改用Elasticsearch或ArangoDB来提高Eiffel事件持久性解决方案的性能。为测量4种类型的请求的请求吞吐量进行了实验。作为衡量性能的前提条件，实施了对不同数据库管理系统（可在这些系统之间进行更换）的支持。结果表明，Elasticsearch在嵌套文档搜索和图形遍历操作方面的性能均优于MongoDB。 ArangoDB在图形遍历操作方面具有比前者更好的性能，但在嵌套文档搜索方面的性能不佳。

Thesis (M.Sc.)--York University, 2007. Graduate Programme in Software Engineering. / Typescript. Includes bibliographical references (leaves 153-155). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:MR38796

Thesis (M.Sc.)--York University, 2004. Graduate Programme in Computer Science. / Typescript. Includes bibliographical references (leaves 163-167). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url%5Fver=Z39.88-2004&res%5Fdat=xri:pqdiss &rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:MR11919

Software development has gotten more complex and certain parts being more and more automated. Continuous integration practices with automated build and testing greatly benefit the development process. Combined with continuous deployment, the software can go directly from commit to deployment within hours or days which means that every commit is a possible deployment. The ability to trace links between artifacts is known as software traceability which has become a necessity and requirement in the industry. Following these traces and the ability to answer questions and base decisions on them is a complex problem. Tools already used in the industry are hard to adapt since every stakeholder requires different needs. Eiffel protocol aims to be as flexible and scalable as possible to fit as many needs as necessary for the stakeholder. This thesis provides an extension to Eiffel-store, an already existing open-source application that can visualize events in the Eiffel protocol that will be extended with functionality so that it can filter events and answer some questions stakeholders might have.

The current migration of companies towards continuous integration and delivery as well all service-oriented business models brings great benefits but also challenges. One challenge that a company striving to establish continuous practices is the need for pipeline traceability, which can bring great enhancements to continuous integration and delivery pipelines as well as offer a competitive edge. This exploratory case study looks at the current and desired states at Axis Communications, a global leader in network video solutions based in Lund, Sweden. It further evaluates the practical and organizational aspects of the adoption of the Eiffel protocol in the company’s pipeline tools through developing a proof-of-concept Eiffel plugin for Artifactory. Based on the discovered technical and organizational needs and obstacles, it draws conclusions and makes recommendations on a possible strategy when introducing Eiffel in a company.