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Operating System for Embedded Applications Control
Kolarík, Tomáš ; Strnadel, Josef (referee) ; Šimek, Václav (advisor)
This thesis deals with selection of operating system for embedded control unit of steam sterilizer with color touch screen. Theoretical part of the thesis deals with the architecture of embedded systems and operating systems with focus on process management. In addition, the thesis deals with a device for which the operating system is selected, the reason for its implementation, advantages and disadvantages in the control system. The thesis also contains categorization of operating systems by way of use. Of these, two open source operating systems eCos and FreeRTOS are described more thoroughly. The code of FreeRTOS was modified from GCC compiler to IAR compiler. The last part of the thesis describes architecture and functionality of the created demo application. Using the touch screen and color display, the application enables drawing of color schemes, which can be transferred to a computer using serial communication.
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Security of operating systems
Kuchař, Karel ; Komosný, Dan (referee) ; Člupek, Vlastimil (advisor)
This bachelor thesis is focused on security of operating systems, which is more and more important. At first, basics of security of operating systems will be covered, followed by describing elements, which help secure communication on internet. In the third chapter, there are discussed the most using operating systems in terms of security and mentioned their most common weaknesses. Following chapter talks about scenarios in which is defined how to properly set each part of the system, so it is secure; also, security applications that make operating system more secure are mentioned. In fifth chapter are above mentioned scenarios applied to virtual machines. To test chosen security settings were individual machines exposed to penetration test. Afterwards, the chosen security settings are evaluated and further steps are recommended. The goal of this thesis is to apprise with problems of security of operating systems and the importance of implementation of security measures.
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Mobile Application "Paramedic doggy" - Injured Cyclist
Richter, Adam ; Milet, Tomáš (referee) ; Vlnas, Michal (advisor)
This work deal with creation of mobile application with educational purposes for children in age between 6 to 10 years with cartoon theme. Educational purpose is focused on first aid in situation where child is forced to help injured person. Application is solved in the form of educational quiz with options A), B) and C), which overlaps with minigames and animations of application mascot. Because of the focus on children in age category, who are learning how to read fluently the application contains in settings option text to speech. Work contains 7 parts including introduction and conclusion. Second part contains general description of the mobile application development. Third part describes in more detail framework Unity, which choice is justified in the part four. Fifth and sixth part describe design and implementation of the resulting application Pejsek Záchranář.
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Implementation of the ACP protocol into L4 operating system
Kolarík, Tomáš ; Strašil, Ivo (referee) ; Burda, Karel (advisor)
This thesis deals with the implementation of ACP protocol which serves to manage the access for operation system based on L4 microkernel. The theoretical part of the thesis deals with methods of access management in computer networks. It focuses primarily on AAA systems which make access management possible. Furthermore it describes in detail the ACP protocol, the types of messages and their feedback. The next theoretical part is dedicated to operation systems and in particular to their architecture and services. Then we get a closer look at L4 microkernel family, their philosophy and properties. We continue with a detailed description of the L4 application interface and its ways of expansion. The practical section deals with the implemented concept of system for ACP protocol support in computers. General concept is then applied in real implementation of ACP protocol into the L4 operation system environment based on the L4 platform. To assist, I also included a detailed tutorial explaining the modeling and compilation of software for this platform. At this point we describe the methods used at the implementation and the description of particular modules and features. The end of the thesis concludes the information about the ways of testing and the implementation properties.
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Impact of Faults and Errors in Context of Embedded Operating Systems
Doležel, Marek ; Pánek, Richard (referee) ; Strnadel, Josef (advisor)
Cílem práce je zhodnotit dopad injektovaných chyb a poruch na vestavěný operační systém a jeho aplikační vrstvu. Tento problém je vyřešen navrženým softwarem pro injektaci poruch a chyb. Tento software vkládá poruchy a chyby za běhu, tj. během provádění vestavěného systému. Injektace je spuštěna časem, jinými slovy, chyba je injektována po uplynutí časovače. Proti C/OS-II jádru spuštěnému pod NIOSII systémem byly provedeny dvě kampaně s injekcí chyb. Obě kampaně cílily na kód plánovače. Kód plánovače byl vylepšen mechanismem kontroly toku v případě druhé kampaně. Výsledky provedených injektačních kampaní ukázaly, že varianta s technikou CFCSS se ve srovnání s nezabezpečenou verzí chovala hůře.
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On Analysis of Fault and Error Impact to Behavior of an Operating System Kernel
Blašková, Adriána ; Krčma, Martin (referee) ; Strnadel, Josef (advisor)
The aim of this bachelor thesis is to analyze the impact of faults and errors on behavior of an operating system kernel. It contains detailed basic concepts and techniques such as system reliability, faults and errors or mechanisms for reliability increase. It focuses on design, implementation, execution and evaluation of experiments in order to classify the effects of faults to the selected operating system kernel but also to the applications, which are running on the kernel.
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Support for NUMA hardware in HelenOS
Horký, Vojtěch ; Děcký, Martin (advisor) ; Libič, Peter (referee)
The goal of this master thesis is to extend HelenOS operating system with the support for ccNUMA hardware. The text of the thesis contains a brief introduction to ccNUMA hardware, an overview of NUMA features and relevant features of HelenOS (memory management, scheduling, etc.). The thesis analyses various design decisions of the implementation of NUMA support -- introducing the hardware topology into the kernel data structures, propagating this information to user space, thread affinity to cores and nodes, memory allocation policies, load balancing, etc. The thesis also contains a prototype implementation of ccNUMA support in HelenOS for the AMD64 platform and a brief evaluation and comparison with ccNUMA support in other monolithic and microkernel-based operating systems.
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M - technology in teaching and school management
Škop, Jaroslav ; Svoboda, Petr (advisor) ; Trojan, Václav (referee)
This Master thesis deals with mobile technologies used for teaching and for management of schools. The theoretical part attempts to define the phenomenon of m- technologies and specifies both the determinate forms and the effects of the innovation when applied to education. The research portion carried out at primary schools by way of a qualitative survey and an interview examines the degree of readiness and the extent of the use of m-technologies with regard to the constructed school infrastructure and to the professional skill of teachers associated with it. Management of a school will get valuable information about the risks related to the introduction of the new technology and, in form of a guide, it will learn how to prepare a project and what to follow while creating the appropriate infrastructure at a school.
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Laboratory for teaching and testing network elements
Poláček, Marcel ; Šimák, Boris (advisor) ; Holý, Radek (referee)
Název: Laboratoř pro výuku a testování síťových prvků Autor: Marcel Poláček Katedra: Katedra informačních technologií a technické výchovy Vedoucí práce: prof. Ing. Boris Šimák, CSc. Abstrakt: Práce se zaměřuje na problematiku týkající se telekomunikačních a počítačových sítí. Vypisuje základní témata tohoto oboru. Cílem práce je najít řešení, vytvoření laboratoře pro testování síťových prvků, které lze libovolně nastavovat, přičemž se zachová maximální autenticita pro odbornou výuku. Je také nutné najít řešení ekonomicky výhodné, aby bylo možné tuto práci aplikovat v co největší možné míře v institucích vyučující danou problematiku. Součástí práce je i vymyšlení základních laboratorních úloh s různou obtížností. Klíčová slova: počítačové sítě, operační systémy, telekomunikační technologie, přenos dat, laboratoř pro testovaní sítí, virtualizace a emulace síťových zařízení
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