ZlomekFS is a distributed file system created for transparent sharing of directory trees designed for the Linux operating system. This work deals with the possibility of zlomekFS portability to another operating system especially the Microsoft Windows. It also explores the possibility of porting zlomkeFS to the Android operating system.

ZlomekFS is a distributed file system designed for transparent sharing of directory trees. This work deals with the possibility of portability zlomekFS to another operating system. The first section describes the problems that must be solved in order to achieve portability of the program. Subsequently, this work examines the possibility of deploying this file system on the Android operating system. Furthermore, this work deals with porting zlomekFS to the Windows operating system. The last section defines general guidelines for the file system code portability.

We attempt to analyze why the adoption of the mobile number portability policy incurs no (or very little) effect in encouraging competition in the telecommunication market. The cause is related to network externality. The level of network externality can be characterized by the proportion of any individual’s friends who are also adopting in the same carrier as the individual does. We find that such network externality may prohibit competition in the telecommunication market when termination-based pricing is prevailing. When termination-based pricing is prohibited, carriers cannot take advantage of network externality. We characterize the conditions such that without termination-based pricing, carriers become more competitive and consumers benefit more than with termination-based prices. Our study provides insightful implication on how to effectively impose the mobile number portability policy to improve competition in the telecommunication market.

TITLE: Portability of transformation of lower secondary ICT education in England into the Czech conditions AUTHOR: Bc. Michal Strnad DEPARTMENT: Department of Information Technology and Technical Education SUPERVISOR: Doc. RNDr. Miroslava Černochová, CSc. ABSTRACT: This thesis deals with teaching Computing subjects at secondary schools in England as a model for transformation of teaching ICT at schools in the Czech Republic. The thesis focuses on the portability of aspects of teaching Computing to the Czech environment and endeavours to identify the possible barriers to implementation processes. The aim of the thesis is to bring new stimuli for changes in the Czech ICT curriculum that are based on the experience of teaching ICT and Computing in the UK. The theoretical part of the thesis consists of the analysis and comparison of the Czech and British curricular documents and the study of academic and journalistic texts. The empirical part uses questionnaires focused on opinions of Czech and English experts on teaching ICT or Computing. It also uses interviews with English teachers of Computing and observations of Computing and ICT lessons at English secondary schools. Based on the results of both parts of the thesis, several recommendations for changes in the ICT study program in Framework Educational...

The European Union introduced the concept of global reforms in the 1990s, in order to open markets for competition. The trajectory of reforms in South Africa took the following shape: first, liberalisation of markets in the telecommunications industry. Second, were the privatisation of incumbents, and lastly, the creation of regulatory agencies, which were mandated by the American Telecommunications Act of 1996 (No. 103 of 1996) to promote competition. These changes opened the market for the licensing of cellular network operators, to compete with the dominant fixed line provider on voice and data services. Competition in its nature, aims to improve services, provide affordable prices to consumers and flexible products where consumer can exercise choice. One of the highlights of competition in the telecommunications sector came through the legislative requirement for the industry to introduce number portability. There are different types of number portability but for purposes of this study, focus shall be on mobile number portability (MNP). This study examines the extent to which MNP has benefited consumers who have ported their number in South Africa. The first chapter provides a background on the global reforms in the telecommunication sector, and this is followed by reforms in South Africa. The second chapter provides a literature review on the effects of MNP, and looks at the regulatory framework of MNP, processes of porting, and the results of the introduction of MNP in various countries. The study found that policy and regulations on MNP had both positive and negative effects. Consumers are now able to switch operators whilst keeping their numbers, thus exercising their right to choice. However, prices still remain uncompetitive and quality of service is yet to improve.

The improvement of performance and the maintenance of stability of a portable air-breathing PEMFC are studied in this thesis. The water content within proton exchange membrane affects strongly on the performance and stability of a PEMFC stack, in which water within membrane can form a conduction channel to provide hydrogen ion transferring from anode to cathode. The over-dried condition caused by a long time operation can also be avoided to prevent the membrane from damaging. Thus the proper humidification of a stack is important for a portable air-breathing PEMFC system. The traditional humidifier is too bulky to be suitable for portable fuel cells. A simple humidification system developed in this research is making use of the water stored in the stack bottom and the self-generating heat by chemical reaction to drive the passive humidification system of this stack. The water at the bottom of the tank can be sucked with cotton threads in cathode and a piece of cotton cloth by capillary phenomenon and transfer to the membrane of MEA. The cotton threads humidification in cathode is enough in low and middle current density in this study. It is not enough in high current density due to the large water vapor dissipation in the cathode surface, so a cotton cloth in anode is added to increase the evaporating surface to supply water to membrane. This passive humidification system does not need extra energy, and it only employs the heat generated by the cells. The system follows the simple principle, which is always obeyed in a portable fuel cell system. A 16-cell HFC stack developed in this research adopts carbon fibers as current collectors. Two pieces of 8-cell anodes is placed in the inner sides of the stack, and the 8-cell cathode is located on external sides, which is exposed directly to the ambient air. The 16-cell can connect in series or parallel. The experimental results show that it is helpful to add cotton threads in cathode and cotton cloth in anode to improve the stability of the 16-cell stack during a the long period operation. The 16-cell HFC stack has succeeded in the operation and charging for an IPhone, digital photo frame, and LED light. The experiments have proved that this type of the lightweight humidification system is helpful in the future portable hydrogen fuel cell applications.

[pt] A utilização de arquiteturas distribuídas no mundo da computação vem crescendo de forma rápida face o surgimento de novas tecnologias dos computadores, tornando-os, cada vez mais, com maior capacidade de processamento e armazenagem de dados e permitindo sua interligação através de poderosas redes de comunicação. Tais arquiteturas são a plataforma base para a construção de aplicações que exigem o caráter distribuído. Porém é necessário o desenvolvimento de ferramentas que auxiliem o projeto e implementação destas aplicações, abstraindo o desenvolver da complexidade destas arquiteturas. O ambiente RIO desenvolvido na PUC tem este objetivo de tornar o desenvolvimento de aplicações distribuídas mais simples, modular e fácil de ser reconfigurado. O objetivo deste estudo é o de analisar o ambiente RIO do ponto de vista de uma característica muito importante no mundo distribuído: sua portabilidade. São apresentadas alternativas para melhorá-la sensivelmente, tendo como aplicação a implementação de uma delas, que é a padronização POSIX. / [en] The use of distributed architectures in the computing world has been growing quicklyn due to the emerging computer tecnology, that gives them more process and storage capacity and permits their interconnection by powerful communication networks. These architectures are the base for building distributed applications. However, it is necessary to develop tools that help the project and implementation of these applications, abstracting the developer from the complexity of these architectures. The RIO environment has been developed at PUC with the objective of marking the distributed application developing more simple, modular and easily reconfigurable. The objective of this survey is to analyse the RIO environment from an important point of view: its portability. Alternatives to improve it are presented and, as an application, the implementation of one of them, namely POSIX.

When attempting to get a software product to reach a larger part of the market, portability is a key factor. Unfortunately, it is often neglected from the software development cycle, and rather achieved by ad hoc methods in not very cost-effective ways. This thesis investigates portability in the context of mobile development. Previous research in this particular area has been hard to find, despite there obviously being special aspects surrounding it which are worth investigating further. The project was initiated with a literature study to find out the current state-of-the-art for portability. After this step the development of a mobile application was conducted, before which a market analysis had been carried out in order to explore which mobile platforms would be the most relevant to develop it for. The point of this case study was to attempt to achieve as high a degree of portability as possible, to later port the application to another platform. Based on the data gathered from this, conclusions were drawn and a general model with guidelines for developing mobile applications with portability as a main attribute was constructed. Among the more important lessons learned was that portability is more important in mobile development, due to the market being so diverse, while it also is a lot harder to achieve properly. This research will hopefully help development teams see the strengths and weaknesses of mobile application portability more clearly, allowing them to more easily design for it as well as making it a more intricate part of their process.

In order to create landscapes able to adapt to the constantly shifting demands placed upon it by human and ecological processes, there is a need to incorporate the flux of these human and ecological processes into a physical and dynamic share of the built environment. This will require a perceptual shift in understanding this human/ecological relationship (on the part of both the designer and the user) as well as a change in the design/implementation/management strategies currently employed by designers and planners. Instead of designing landscapes expected to be maintained to look and act in a static manner, the built environment needs to be designed with flux in mind. This thesis' methodology begins with a position paper narrating the current body of knowledge regarding human experience and treatment of dynamic systems within the built environment, focusing specifically on the Outer Banks, a series of barrier islands located off the northern coast of North Carolina. It looks at this relationship through three languages: scientific (or geomorphologic), legislative and design. Next is a sampling of case studies aimed at emphasizing this dynamic relationship between humans and their surroundings. Finally, the design project incorporates the viewpoint developed in the position paper and applies it to a hypothetical site design located in Kitty Hawk, North Carolina. The site is currently slated for a Hilton hotel that will be finished by Spring 2006; however, the spirit of the design has the potential to be incorporated into many sites along the coast. / Master of Landscape Architecture

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