Open source software (OSS) is typically created in a decentralized self-organizing process by a community of developers having the same or similar interests. A key factor for the success of OSS over the last two decades is the internet: Developers who rarely meet face-to-face can employ new means of communication, both for rapidly writing and deploying software. Therefore, many tools emerged that assist a collaborative software development process, including in particular tools for source code management (SCM) and version control. In the R world, SCM is not a new idea, in fact, the R Development Core Team has always been using SCM tools for the R sources; first by means of Concurrent Versions System (CVS), and then via Subversion (SVN). A central repository is hosted by ETH Zürich mainly for managing the development of the base R system. Mailing lists like R-help, R-devel and many others are currently the main communication channels in the R community. Also beyond the base system, many R contributors employ SCM tools for managing their R packages, e.g., via web-based SVN repositories like SourceForge (http://SourceForge.net/) or Google Code (http://Code.Google.com/). However, there has been no central SCM repository providing services suited to the specific needs of R package developers. Since early 2007, the R-project offers such a central platform to the R community. R-Forge (http://R-Forge.R-project.org/) provides a set of tools for source code management and various web-based features. It aims to provide a platform for collaborative development of R packages, R-related software or further projects. / Series: Research Report Series / Department of Statistics and Mathematics

Informationen des Universitätsrechenzentrums

This master's thesis deals with the analysis of simulation of computer networks. A statistical tool was designed for evaluating a communication between stations in the computer network. JSimlib4 Java library was used for the simulation of computer networks. It is a lightweight but robust simulation library, designed for creating simple or even quite complex simulation models of distributed systems. The Statistical tool was written in Java programming language and developed in an EasyEclipse integrated development environment. It was designed as an Eclipse Rich Client Platform application. Eclipse Rich Client Platform is a relatively new technology, which has a lot of favorable properties. The Statistical tool can be divided into 3 parts: • creating a log file, • creating a filter, • creating/showing an output. The Statistical tool creates records into a log file during every communication between stations. This log file contains a comment on the first line. This comment describes the definition of records. Every record contains 2 IP addresses with the used ports at the beginning of the record, then the time, the amount of bytes, the protocol and the direction of communication. Every item in the record is divided by a colon. The Statistical tool can evaluate a communication between stations. At first, it has to define a filter according to which it will assess the suitable stations. It can be created either by adding IP addresses or names of the stations onto a list on a workbench. Filter can be loaded from a file that already includes these IP addresses and other information too. After defining the filter, the Statistical tool can create either a diagram or a file. At first, the Statistical tool reads the log file line by line and compares the IP addresses, which were added to the filter with the IP addresses in a log file. When the Statistical tool finds a complying IP address, it reads the whole line and adds an amount of bytes defined on that line to the final diagram that is shown after reading the whole log file. In the case of finding 2 or more complying IP addresses that sent the data at the same time, an amount of these transfers is calculated by adding them and this amount is then shown in a diagram. After reading the whole log file a diagram or a file is shown at the bottom of the window. The diagram is created by a Java library JFreechart and it shows the amount of transferred bytes. The x-axis represents the time and the y-axis represents the amount of transferred bytes. The created file is for next work with the calculated data and it can be loaded for example by Matlab or Octave. The first line in the file represents the time for axis x and the second one represents the amount of transferred bytes for axis y. These lines are followed by a command "plot(x,y)" for drawing a diagram.

The thesis analyzes version control system Subversion and its available backends for storing data in a repository. It compares these backends and describes basic features of a new SQL database backend. Design and implementation of the new backend, based on MySQL database, is described and the new backend is then compared with existing backends BDB and FSFS.

The currently emerging trend of building more complex web applications to solve increasingly more involved software problems has led to the the need for a more automated and practical means for deploying resources required by these advanced web applications. As web based applications become more complex and involve more developers, greater system redundancy, and a larger number of components, traditional means of resource deployment become painfully inadequate as they fail to scale sufficiently. The purpose of this research is to provide evidence that a more sound and scalable test and deployment process can be employed and that many of the components of this improved process can be automated and/or delegated to various system actors to provide a more usable, reliable, stable, and efficient deployment process. The deployable resources that have been included for their commonality in web based applications are versioned resources (both ASCII based and binary files), database resources, cron files, and scripting commands. In order to achieve an improved test and deployment process and test its effectiveness, a web-based code deployment tool was developed and deployed in a production environment where its effects could be accurately measured. This deployment tool heavily leverages the use of Subversion to provide the management of versioned resources because of its extensive ability to manage the creation and merging of branches.

Informationen des Universitätsrechenzentrums:Sicherheit der zentralen Webserver PROWeb-Dienst erneuert Windows 7 Versionsverwaltung mit SVN Kurzinformationen: Speicherdienste: Senkung der Kostenbeteiligung, Erneuerung Drucktechnik in Campusbibliotheken, Sehbehinderten-Arbeitsplatz in der UB, Neue PC-Technik in den Campusbibliotheken Software-News: Softwarebedarf in Pools für 2010 anmelden, KISSsoft Studentenlizenzen, Neue Handbücher eingetroffen

The main purpose of this master's thesis is to create language version tools for web Portal of BUT. There are possibilities of applications using databases or without them. The next part of the thesis analyses current situation of the web Portal of BUT. I described individually servers, tools and mainly solution ensuring multilingual sites. Thereinafter I attend to design and implementation of required system. This system consists of some single scripts and web applications for web developers and translators. Finally I will describe the procedure of integration of this system to current web Portal of BUT.