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FITKit Virtualization
Vavruša, Marek ; Korček, Pavol (referee) ; Vašíček, Zdeněk (advisor)
Thesis presents a method of FITkit hardware platform virtualization. First part describes an extension of the libkitclient library to support virtual devices and discusses a protocol design for FITkit device sharing in the IP networks. The protocol is extended to offer an automatic device discovery in local network based on UDP multicast. The second part of the thesis presents an architecture for a remote compilation of FITkit platform binaries and the implementation in the fcmake and QDevKit. The last chapter summarizes implemented tools and presents possible future extensions.
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Checkers - like Network Game
Semerád, Lukáš ; Horáček, Petr (referee) ; Čermák, Martin (advisor)
This bachelor thesis is concerned with board game checkers. It summarizes the history and previous games. The thesis discusses the various versions of the rules that are played around the world. It also deals with the analysis of algorithms for a computer game. The result of this work is a program that allows the game two players, game via network and play against the computer. Also allows different setting default rules.
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Lossless Data Compression for IP Networks
Pánek, Richard ; Kajan, Michal (referee) ; Korček, Pavol (advisor)
This bachelor's thesis deals with data compression methods in IP networks. The LZW compression algorithm and its history is described more in detail. This algorithm is tested on the di erent types of IP tracffic. It is shown that depending on the traffic type it is possible to reduce data to 70% of its original size. As the final implementation of the LZW algorithm is intented for use in the FPGA the results from high level synthesis (from C to VHDL language) are fi nally described.
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Wireless Sensor Network for Building Monitoring with Partially Dynamic Topology
Urbanovský, Jiří ; Zbořil, František (referee) ; Samek, Jan (advisor)
This thesis describes the possibilities of wireless sensor networks in monitoring buildings and summarizes the most common use of wireless sensor networks in practice. There are also described communication protocols needed for communication between each node and properties of topology of created network. Importance is lay on implementation of fully dynamic network with automatic network topology establishment. The application is designed for the TinyOS operating system and hardware platforms MICAz and IRIS, and its task is to establish the topology and send the data obtained from sensors to base station. The implemented protocol is based on the Collection Tree Protocol protocol and using best effort delivery is able to establish a dynamic topology. Further there is described the method of storage and subsequent graphical and textual representation of data collected.
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Synthesis and Characterization of Multifunctionalized Biodegradable Copolymers
Michlovská, Lenka ; Petrůj, Jaroslav (referee) ; Lehocký,, Marián (referee) ; Vojtová, Lucy (advisor)
Předložená disertační práce shrnuje současné poznatky v oblasti termosenzitivních biodegradabilních kopolymerů, které ve formě vodného solu gelují při teplotě lidského těla. Tyto polymerní materiály jsou použitelné v medicíně pro injekční aplikace jako nosiče léčiv či resorbovatelné implantáty pro regeneraci tkání. V experimentální práci byly pomocí vakuové linky syntetizovány termosenzitivní amfifilní triblokové kopolymery na bázi biodegradabilního hydrofobního polylaktidu a polyglykolidu a biokompatibilního hydrofilního polyethylenglykolu (PLGA–PEG–PLGA). Připravený PLGA–PEG–PLGA kopolymer se dvěma fázovými přechody sol-gel a gel-suspenze byl následně modifikován anhydridem kyseliny itakonové. Výsledný funkcionalizovaný ITA/PLGA–PEG–PLGA/ITA kopolymer obsahuje na koncích řetězců reaktivní dvojné vazby vhodné k další polymeraci či síťování a karboxylové skupiny pro případné modifikace biologicky aktivními látkami. Fyzikální i chemické síťování bylo dále sledováno jak z hlediska poměrů hydrofilního a hydrofobního řetězce, tak i z hlediska množství navázané kyseliny itakonové. Vodné roztoky syntetizovaného ITA/PLGA–PEG–PLGA/ITA kopolymeru gelují v rozmezí teplot 33 - 43 °C. Kritická gelační koncentrace byla 6 % a kritická gelační teplota 34 °C pro kopolymer s poměrem PLGA/PEG = 2,5. Čím je kopolymer více hydrofobní, tím geluje dříve a je více hydrolyticky stabilní. Tuhost gelu stoupá se zvyšujícím se poměrem PLGA/PEG a je závislá na typu rozpouštědla použitého při přečišťování kopolymeru. Připravené ITA/PLGA–PEG–PLGA/ITA makomonomerů byly síťovány pomocí modrého světla bez dalšího síťovadla. Hydrolytická stabilita vzorků modifikovaných pomocí ITA se výrazně zlepšila a zvýšila v přímé úměře jak s rostoucí dobou síťování, tak s množstvím dvojných vazeb na koncích řetězců. Vzorek s 63 mol% ITA síťovaný 40 minut ve vodě zcela zdegradoval po 32 dnech. Protonovou NMR relaxometrií bylo zjištěno, že když vzorek ve vodě nabotnal (po cca 12 hodinách), množství nevázané vody se začalo snižovat a postupně difundovat do kavit na povrchu vzorku a pomalu se měnit na slabě a pevně vázanou vodu na polymerní řetězce. Nicméně, termální stabilita chemicky síťovaných vzorků vzrůstala pouze do 20 minut síťování. Pomocí ATR-FTIR bylo prokázáno, že se přibližně 57 % dvojných vazeb kyseliny itakonové (při vlnové délce 1640 cm-1) přeměnilo na nové jednoduché RR'C-CHR'' vazby při vlnové délce 795 cm-1. Delší čas síťování (nad 30 minut) vedl ke změnám v chemické struktuře pomocí beta-štěpení řetězců a částečné rekombinaci dvojných vazeb. Díky vzniku nových dvojných vazeb v jiných částech řetězce se snížila termální stabilita z 242 °C na 237° C a teplota skelného přechodu z -2,2 na -5.8 °C. Předložená práce popisuje, jak složení polymeru, modifikace funkčními skupinami a fyzikální podmínky ovlivňují fyzikální a chemické síťování připravených amfifilních kopolymerů. Kontrola hydrolytické a termální stability hydrogelů je zapotřebí zejména při uvolňování léčiv a regeneraci tkání.
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25 let vědeckých výpočtů na Ústavu geoniky
Jakl, Ondřej
The paper summarizes the role of computers in the twenty five years since the establishment of the Institute of Geonics Cz.Acad.Sci. It recalls the importance of computer systems and computer science in general, especially for mathematical modelling, one of the most important research fields of the institute. In the course of time computers, networks and Internet are unavoidable for each of the fields of study of the institute. The contribution surveys the main stages in this development, from the point of view of demanding computations in particular, and mentions various computers and hardware characteristic for each stage.
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Standards for application of polymer optical fibres
Stiburek, Martin ; Tejkal, Vladimír (referee) ; Šporik, Jan (advisor)
The aim of thesis is description of polymer optical fiber (POF). In particular, focusing on their application and its associated standardization. After explaining the principle of signal transmission by polymer fibers, glass fibers are compared with the polymer fibers. The attention is then paid to the types of POF and their connectors. Another part is engaged in standards of polymer fibers, according to their area of application. Following chapter describes the application of polymer fibers in practice, especially in the automotive industry and sensor technology. Standalone chapter is dedicated to deploying POF fibers in LANs. It mentions comparasion with copper and wireless networks, summarizes the advantages and disadvantages. Chapter also provides an overview of the components used in POF - optical converter, switch with optical interfaces, optical network card, etc. In the practical part is created the design of home network for two-storey family house. The proposal was implemented by CableProject CAD software, first using copper cabling (UTP category 5e) and then using polymer fibers. Finally, both proposals are compared with each other. It has been made detailed financial analysis, compared performance of instalation and methods of cable instalallation. The practical part is also dedicated to measuring the parameters of POF networks, the impact of the attenuation loss, explores methods of joining glass and polymer fibers and is engaged in IPTV transmission simulation in real conditions.
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Mobile IPv6 in OPNET Modeler
Žáček, Martin ; Růčka, Lukáš (referee) ; Skořepa, Michal (advisor)
Master’s thesis includes knowledges about mobility support in IPv4 networks and studies abilities for mobility support in IPv6 networks. Describes protocols for mobility support, their functions and topologies like MIPv6 (RFC 3775), FMIPv6 (RFC 5568), HMIPv6 (RFC 5380) and F-HMIPv6. The thesis contains a design of the simulation MIPv6 in the OPNET Modeler program and the measured results are explained. There are analysis of source code for mobility support in MIPv6 too, which were used for design a new protocol according to FMIPv6 in the OPNET. The following parts of the proposal have been successfully resolved. The link-layer events detection, which triggers FMIPv6 protocol and implementation of two new types of messages, RtSolPr and PrRtAdv. Knowledges from this thesis could be used for next development of FMIPv6 in the OPNET. But could be used for generaly development new protocols working at network-layer too.
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Small photovoltaic system
Just, Jan ; Chroboczek, Libor (referee) ; Pospíšil, Jiří (advisor)
This thesis describes the fotovoltaics at the present time. Introduction includes information regarding to resources of solar energy, main principle of transformation solar energy to electrical and history. Next parts summarise types of solar cells in economical term, types of material and description of their properties. Thesis includes the construction of fotovoltaic panel and its configuration to fotovoltaic systems with or without connection to electrical power network, contains convenient technologies for improving efficiency and the czech legislation. Final part focuses on designing grid-on system for real object including komplex study of object location, used components and calculation of whole produced electric energy and pay-back time. The main aims are presented in conclusion as well as advantages and disadvantages of the investment.
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Význam vlivu vnímání na kurzy akciového trhu
Holoubková, Klára
The author has quantified the impact of perception of economic subjects through the Facebook social network on the stock prices. The contribution of this paper is both theoretical and practical. The theoretical part summarizes the results of previously published papers on this topic. The practical part concerns about the confirmation of the influence of perception of the stock market via regression analysis and moving correlation at chosen companies. The recommendation is mainly aimed at the marketing and the PR department. The author also takes into consideration the possibility of using social networks to confirm the development of economic variables based on the current perception of news and information by the economic subjects.
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