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Distropine - Distributed System for Anotation of Web Pages
Kaprál, Ondrej ; Zavoral, Filip (advisor) ; Nečaský, Martin (referee)
The aim of this bachelor thesis is to design and implement peer-to-peer version of a service for commenting of internet resources. From a functional point of view it is an implementation of P2P discussion forum. We attempt to achieve the highest possible degree of decentralization while meeting these requirements: usage of distributed hash table to store data content and deployment of user identity concept while protecting this identity against theft. In the analysis we came to realize that in the environment where users do not establish any bindings and content distribution is broadcast in nature there is need for globally trusted authority. For this reason it is deployed PKI with certication authority (CA). Our pursuit of maximum decentralization is reached by multiple measures in the design of the application. We allowed simultaneous operation of multiple CA instances, we have also minimized the power of CA to monitor user activities or to censor the content of the system. User interface of the software is integrated into web browser what helps us to shield user from complexity caused by P2P design.
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IP Multicast data transfer with partial congestion control
Smrčina, Jan ; Lukeš, Dan (advisor) ; Zavoral, Filip (referee)
TODO The work is dedicated to examine possibilities of peer-to-many-peers, reliable, application layer protocol, which has no central controller and transfers data over IP multicast. The protocol should maximize utilisation of multicast in order to minimize the sum of data transferred over all links of the network. It also has to take all wide-area network properties into account, such as data loss, data reordering, and varying throughput of each part of the network in time. The work proposes such experimental protocol and contains its implementation for UNIX-like operating systems. The protocol is very complex and hard to implement, what allows much improvement and further works. Powered by TCPDF (www.tcpdf.org)
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Modelling n-ary relations in description logics
Blaško, Miroslav ; Zavoral, Filip (advisor) ; Vojtáš, Peter (referee)
DLR is an expressive description logic with support of n-ary relations. Currently, there is no known algorithm for native reasoning within DLR. However there are two approaches that allow to delegate reasoning services of DLR to binary description logics. In this work we de ne new description logic NDL, a subset of DLR, for which we believe that native reasoning can be provided. Based on the existing approaches, we transform NDL to binary description logics for which the current of state-of-art of reasoners exist. New transformations will be analysed both theoretically and empirically. N-ary data for benchmark will be created from existing OWL ontologies by transformation of opposite direction. This benchmark can be used for comparison of native reasoning and reasoning by transformation to binary DLs.
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Implementace Time Addressable Storage
Palkovský, Ondřej ; Zavoral, Filip (advisor) ; Děcký, Martin (referee)
Overview of technologies used to keep historical versions of data-backups, snapshots, asynchronous replication, HSM, Storage Area Network, storage virtualization. Description of the programming layer device mapper implemented in current versions of Linux, description of the functionality of the current system of snapshots including integration in the userspace administrative tools. Design and implementation of a new snapshot system based on snapshot/view architecture with chained snapshots. Design and implementation of disk journal to speed up the write operations. Integration of the whole solution into LVM.
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Database manager
Dolejš, Ondřej ; Zavoral, Filip (advisor) ; Skopal, Tomáš (referee)
The presented work is about the program DBManager, which I created. This work follows the reasons and motivations which had led to creation of the program and describes analysis preceding the creation of the program. Furthermore it describes an implementation of the program and its resulting functionality. The program DBManager is a lightweight database manager with ability to connect to the Oracle database as well as to the MS SQL Server database. The program contains the SQL console with output into the table and cooperating object browser. Results can be filtered, sorted and modified, and the modified data can be easily sent back to the database. The Object browser shows us well-arranged common database objects. The most usual database objects, such as tables or views, can be created or modified by using user friendly wizard. SQL commands as well as results of the commands can be saved and loaded from a file.
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Information system for schools
Kozák, Vladislav ; Patočka, Mikuláš (advisor) ; Zavoral, Filip (referee)
The task of the work is to develop information system for primary and secondary schools. The application allows to insert and store data related with school and performs mass printing of school reports. The user interface is easy to use and includes grafic interface for setting the printer output. The application comunicates with database server and supports parallel access.
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Project Planning and Time Tracking
Kučera, Tomáš ; Zlomek, Josef (advisor) ; Zavoral, Filip (referee)
Software development is much easier with a correct project plan. In our work we study design and implementation of the web system for creating project plans. Users of the system make records about their work and they enter development progress of the tasks in the projects. Emphasis is placed on clearly organized project tree structure with the information about project progress and current costs. The system is programmed in the PHP scripting language. Data are stored in the MySQL database.
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Creating web startup and introducing the Lean development
Hejl, Tomáš ; Holan, Tomáš (advisor) ; Zavoral, Filip (referee)
This work describes The Lean Development methodology that can be used for managing development without known customer. Moreover, it describes the development of an already finished project - a web application that did not involve this methodology. After that this work finds out which aspects of this development would change, if the Lean Development methods were integrated, and proposes a specific solution for subsequent development, compliant with this methodology. At the end, this work presents the list of activities that the development team must pass when developing without known customer.
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Web system for project management
Hampl, Michal ; Trčka, Martin (advisor) ; Zavoral, Filip (referee)
Aim of this work is to design and implement internet application, which offers tools for project management. Application will be intended for software development projects in particular, but regarding universal design, it will be possible to use it in other branches as well. Application will offer these features: - user accounts and roles management, including access control for individual; parts and system features; - projects structure management (phases, sub-projects); - connected with calendar, planning and deadline supervision; - support for text communication of users; - storage of documents and other files; - knowledge base. Application will be implemented using ASP.NET technology, C# language.
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Using XML technologies to apply design patterns
Hála, Vojtěch ; Bednárek, David (advisor) ; Zavoral, Filip (referee)
Although contemporary programming style involves massive use of design patterns, programming languages does not offer suitable means tu support their application. Aim of this work is to show in practice that modern XML technologies, namely XSL Transformations, allow developers to avoid some routine tasks required by the objective language itself. This reduces the probability of errors, allows developers to focus on the key parts of the design, and makes maintaining the code markedly easier. These benefits come to light especially in large projects with hundreds to thousands of classes with complicated relations. In this Thesis we demonstrate these ideas on an example of a C++ compiler project.
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