The demand for Internet-based visual content delivery has increased significantly in recent years, triggered mainly by the widespread use of Internet enabled smartphones and portable devices, and by the availability of super HD content.As a consequence, live and on-demand video content has become the most important source of network traffic in mobile and fixed networks alike.In order to be able to efficiently deliver the increasing amount of video traffic, network operators have started to deploy caches and operator-owned CDNs. These solutions do not only reduce the amount of transit traffic of the operators but they may also improve the customers' quality of experience, through bringing the video content closer to customers. Nevertheless, their efficiency is determined by the algorithms and protocols used to allocate resources, both in terms of storage and bandwidth. The work in this thesis addresses the allocation of these two resources for operator-owned content management systems. In the first part of the thesis we consider a cache maintained by a single network operator. We investigate how caching at a network operator affects the content distribution system as a whole, and consequently, the efficiency of content delivery. We propose a model of the decision process undertaken by a network operator that aims at optimizing the efficiency of a cache by actively managing its bandwidth. We design different algorithms that aim at approximating the optimal cache bandwidth allocation and we evaluate them through extensive simulations and experiments. We show that active cache bandwidth allocation can significantly increase traffic savings. We then consider the potential interaction among caches maintained by different network operators.We consider the problem of selfish replication on a graph as a modelof network operators that individually deploy replication systems, and try to leverage their peering agreements so as to minimize the traffic through their transit providers. We use game-theoretical tools to investigate the existence of stable and efficient allocations of content at the network operators. We show that selfish myopic updates of content allocations at different network operators lead the system to a stable state, and that the convergence speed depends on the underlying network topology. In addition, we show that interacting operator-owned caches can reach a stable content allocation without coordination, but coordination leads to more cost efficient content allocations. / <p>QC 20140401</p>

Den ökande användningen av mobila enheter ställer nya krav på utformning av ett företags webbtjänster. Utseende, storlek och gränssnitt på webbsidor behöver anpassas för alla typer och storlekar av mobila plattformar. Syftet med det här arbetet är att utreda de olika lösningsalternativ som finns för anpassning till mobila enheter samt föreslå och utvärdera en lösning utifrån olika kriterier. En prototyp utvecklas som kommer att testas i en fallstudie. De lösningsalternativ som utreds är native applikation, hybridapplikation, mobilsida, responsivt gränssnitt/responsiva ramverk och Web Content Management Systems. Lösningsalternativen utvärderas utifrån kriterierna funktionalitet och användbarhet, inlärningstid/utvecklingstid, plattformsstöd och tillgänglighet, prestanda, underhåll och vidareutveckling, popularitet, kostnad/licens samt konverteringsmöjlighet. Det lösningsalternativ som visar sig mest fördelaktigt enligt kriterierna är responsivt gränssnitt. I fallstudien har en prototyp utvecklats baserat på ett responsivt ramverk. Implementationen har utvärderats och bekräftar fördelarna med responsivt gränssnitt. Arbetets slutsatser lyfter fram för- och nackdelar med de olika lösningsalternativen, identifierar problem och möjligheter utifrån fallstudien – t.ex. visade det sig inte några större prestandaskillnader mot en statisk webbsida men däremot visade sig vissa konflikter mellan programbibliotek – samt slutligen ges generella rekommendationer och erfarenheter för den som står inför en mobilanpassning av en webbplats. / The increasing usage of mobile devices places new requirements on the design of company websites. Appearance, size and interface of webpages need to be adapted for all types and sizes of mobile platforms. The purpose of this thesis is to investigate the various solution options available for adaptation to mobile devices and also tosuggest and evaluate a solution based on different criteria. A prototype will be developed and tested in a case study. The investigated solution options are native application, hybrid application, mobile website, responsive web design frameworks and Web Content Management Systems. The solution options are evaluated based on the criteria functionality and usability, learning

Content management systems allow easy creation and management of web pages even without expert skills. Thesis describes application of these systems at Customs Administration of Czech republic and proposes serie of steps required to migrate web pages from one system to another. Framework for developing web applications enables to integrate these applications into content management system and extend its functionalities.

Web site usability is an important factor when creating and managing web sites, since it essentially determines whether or not the site is usable by its intended audience. As an attempt to simplify the process of achieving high usability for web sites, this thesis has explored the possibility of integrating usability guidelines with web content management systems. The overall aim was to determine if, and how, usability guidelines can be implemented in a web content management system to make it promote and deliver web site usability, and to find solutions that aid web site users in carrying out the basic tasks of finding, reading and understanding information on the web. To estimate the effectiveness of such solutions, the level of human dependency was considered when evaluating the solutions. This thesis has shown that it is possible to construct such solutions, and has found several for each of the basic user tasks of finding, reading and understanding information. Although some of the found solutions automatically improve a site's usability or actively promote site usability, the majority are still dependent on human efforts in order to promote usability. It was concluded that it is possible to integrate usability guidelines with a web content management system, but that web site usability still largely depends on human effort in order to be effective.

An increasing number of libraries and information centers are using content management (CM) applications to develop, redesign, and maintain their websites. the purpose of this research was to provide understanding of attitudes of academic librarians about how their utilization of CM technology influences the information services they provide at the academic library’s website and to examine their perceptions of how using CM affects the creation of the web content. This research applied a qualitative research design (electronic survey and in-depth semi-structured interviews of academic subject librarians) with elements of a quantitative approach. the study discussed the concept of web authorship and supplied fundamentals for future theoretical research about authorship in web content development at academic libraries. the study provided an overview of CM at academic libraries and explored characteristics of dynamic content and semantic web applications at their websites. It discussed librarians’ opinions about issues of migration to the new content management system (CMS), factors affecting its efficient employment, and roles of librarians in web content management. Results of this study will serve to future research on management behavior of academic librarians authoring web content with the help of CM. the findings about the difficulties observed in the use of CMS and solutions, influence of training and learning, importance of cooperation and communication, adjustment of the CMS to the users’ needs, qualifications and skills needed in application of CM, distribution of responsibilities in the use of CMS, features of the CMS, and requirements to its functionality will have implications for academic and other libraries applying CM.

WordPress is a very widely used content management system that enables users to easier create websites. The popularity of WordPress has made it a prime target for attacks by hackers since a potential vulnerability would affect many targets. Vulnerabilities that can be utilised in an attack are referred to as exploits. Most exploits are only viable for a subset of all the version of the software that they target. The knowledge of which version of a content managements system a website is running is often not explicit or easy to determine. Attackers can potentially exploit a vulnerable website faster if the version is known, since this allows them to search for existing vulnerabilities and exploits, instead of trying to identify a new vulnerability. The purpose of this thesis is to investigate existing and alternate methods for detecting the version of WordPress on websites that are powered by it. The scope is limited to an analysis of existing tools and the suggested methods for version identification are limited to identification using unique values that are calculated from the contents of files. The suggested methods for version identification and the generation of the required data is implemented using Python 3, the programming language. We investigate the feasibility of version obfuscation, how discernible a version of WordPress is, and how to compare versions of WordPress. The thesis has proven the feasibility of version identification with a new perspective that delivers more accurate results than previous methods. Version obfuscation has also been proven to be very feasible without affecting the usability of the WordPress website. Furthermore, a method for discerning between two specific versions of WordPress is presented. All the results are in theory applicable to other software projects that are hosted and developed in the same way. This new area of research has much for security professionals and has room for future improvement.

With almost 70% of the population being active internet users and with signs that this number only will increase in the coming years, the value for companies, organisations, and hobbyists to be able to share what is important to them will also increase. One of the most common ways to gain attraction on the internet is with the help of a website. There are multiple ways to create a website, with one popular approach is with the help of content managing systems (CMS). Different CMSs offer a range of functionality and range in complexity. A staple name in the CMS community is Drupal. Drupal can provide the entirety of an application but can also be used in a decoupled mode where it serves as the backend for a frontend developed with other technologies, e.g. a JavaScript library like ReactJS. This thesis aimed to evaluate how the JavaScript library ReactJS interacted with Drupal when used in its decoupled mode. Different methods, such as JSON:API and GraphQL, to export data from the Drupal site were also compared. The thesis also aimed to guide less experienced developers through their journey of decoupled CMSs. Through extensive research about Drupal and ReactJS, as well as the core functionalities, the thesis provides the necessary groundwork for implementing a decoupled application. The concepts are then further expanded with realistic examples to provide a deeper understanding of the subject. By implementing a realist web application containing common functionalities found in modern web applications, it could be concluded that Drupal and ReactJS complemented each other excellently by providing each other with features the other one did not have. Difficulties encountered were related to the unique technologies rather than their collaboration. The comparison between JSON:API and GraphQL elucidated clear benefits and drawbacks for each, providing a guide for developers to choose based on their specific needs. Future research could broaden the scope to other CMSs and JavaScript libraries to enhance the understanding of decoupled architecture. Exploring the implementation of custom APIs is also suggested for further studies.

Med flera alternativ att välja mellan för att designa och utveckla webbsidor kan det vara svårt för en nybörjarutvecklare att veta vad man ska välja. Detta examensarbete jämför hur enkelt det är för en nybörjare att lära sig och använda de två Content Management Systemen (CMS) Concrete5 och RefineryCMS för att bygga en webbapplikation. Concrete5 använder PHP och RefineryCMS använder Ruby och lättheten i att lära sig grunderna i dessa programmeringsspråk diskuteras också.För att jämföra dessa två CMS, dokumenterades olika steg. Implementationen utfördes på en MacBook Pro, OS X 10.9.2, sen 2011 modell. Relevanta delar av funktionaliteten jämfördes även med hjälp av Authoring Tool Accessibility Guidelines 2.0.Resultaten visade en signifikant skillnad mellan de två CMS:en, även om båda har sina för- och nackdelar. Sammanfattningsvis ansågs Concrete5 som det CMS:et med bättre aspekter för att bygga en enkel hemsida med de förutsättningar som fanns och tack vare de många funktioner det erbjöd användaren. RefineryCMS kanske kunde ha fungerat bättre om det var under andra förutsättningar, vilket inte kan dras som en slutsats i denna uppsats. / With many options to choose from when designing and developing websites, it can be difficult for a beginner developer to know what to choose. This thesis compares how easy it is for a beginner to learn and use the two Content Management Systems (CMS) Concrete5 and RefineryCMS to build a web application. Concrete5 uses PHP and RefineryCMS uses Ruby and the ease of learning the basics of these programming languages is also discussed.To compare the two CMSs, different steps were documented and compared. The implementation was done on a MacBook Pro, OS X 10.9.2, late 2011 model. Relevant features were also compared according to the Authoring Tool Accessibility Guidelines 2.0.The results showed a significant difference between the two CMSs, even though both had their benefits and drawbacks. In conclusion, Concrete5 was better for building a basic website under the writer’s conditions, thanks to the many features, modules, packages, plugins and templates available, and because it required less time and effort to install. This conclusion is limited to the writer’s conditions and it is possible that RefineryCMS could have worked better than found, if the conditions had been different.

In recent years, a second generation of Web-based technologies have as “Web 2.0” At the core of Web 2.0 are web-based services, social networking and online collaborative functions. Forestry, like other disciplines, has the potential to take advantage of these technologies to alter or change the way traditional interaction between forestry professionals and other interested parties is undertaken. This dissertation explores the use of Web 2.0 and social networking technologies in two domains: (1) eBusiness and (2) Urban Ecology. The thesis is designed to provide essentially two chapters that stand on their own, and describe the background and the design and development of two Web 2.0 online systems. The eBusiness chapter of this thesis includes the research on the applicability of the online community model for today’s forest sector electronic businesses-to-business platforms. The Urban Ecology chapter consists of the research how data integration along with a “content management system” designed for a social network website can be exploited to improve collaboration among geographically distant researchers, policy makers and other stakeholders interested in Urban Ecology. In addition to the text in this dissertation, a “supplement” to this dissertation are two computer systems and databases that the author developed over the course of 2006-2007.

O presente trabalho apresenta uma proposta para a criação de um ambiente web colaborativo responsável pela troca das melhores práticas de planejamento de aulas utilizadas pelos especialistas e educadores, agrupados pelo que chamaremos de artefatos pedagógicos ou padrões pedagógicos, considerados a menor unidade divisível de uma aula. O planejamento será pautado pelo conceitual de design instrucional, que proporciona o encadeamento de forma simplificada e em ordem cronológica de todos os conteúdos previstos a execução de um curso ou de uma disciplina. Com a utilização da ferramenta em ambiente compartilhado (web), será mostrado que o efetivo planejamento de um simples objetivo de aprendizagem ou até mesmo a de um conteúdo mais amplo, por intermédio da apresentação linear e cronológica de todos os artefatos pedagógicos, levará à uma visão geral e completa da composição dos assuntos abordados. Neste momento, será possível visualizar por intermédio de relatórios, dentre as funcionalidades da própria ferramenta, o formato de matriz de design instrucional, um dos produtos essenciais da fase de planejamento de um curso. Para a criação dos artefatos pedagógicos de forma compartilhada será utilizado um protótipo de interface gráfica conduzido por conceitos de arquitetura de informação e usabilidade. Com o objetivo de transformar o protótipo em uma ferramenta, na fase de implementação será utilizada a estrutura de um sistema de gerenciamento de conteúdo, capaz de simplificar esta etapa extremamente complexa. A aplicação por meio do estudo de caso será feita através de uma disciplina do curso de pós-graduação, com foco nas tecnologias de ensino de engenharia, ilustrando a contribuição do presente trabalho e dando condições de um real e efetivo resultado da metodologia utilizada. A sua efetiva consolidação será obtida pelo estabelecimento de uma avaliação de reação aplicada entre o grupo de alunos do referido estudo de caso. / This paper presents , in relation to new forms of teaching and learning , a proposal for the creation of a collaborative web environment responsible for the exchange of best practice techniques for classroom used by educators and experts , grouped by which we will pedagogical patterns or pedagogical artifacts , and grounded in the concepts of \" instructional design \" , which can be considered as a structure that provides to the heterogeneous audience, since experts in education and technology and students interested in a particular subject to plan a simplified form and measurable their respective courses , modules , and related disciplines . With the use of the tool in a shared environment will be shown that the effective planning of a single learning object or even a broader content, through linear and chronological presentation of all educational artifacts will lead to an overview and complete the composition of the subjects covered, coming to provide in one aspect of the tool itself, the format of an instructional design matrix, one of the key products of the planning phase of a course. For the creation of educational artifacts in a shared way, will be used a graphical interface prototype concepts outlined by information architecture and usability, and its last one implementation in a development framework designed for what we call content management system. The application, by case study, will be taken through a course in the graduate with a focus on teaching engineering technologies, illustrating the contribution of this work and giving conditions for a real and effective result of the methodology used, consolidated by the establishment of a reaction evaluation performed between the group of students of that case study.