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Cryptographic schemes based on the discrete logarithm problem
Kadlček, Tomáš ; Holub, Štěpán (advisor) ; Růžička, Pavel (referee)
In the paper we try to give a view of the discrete logarithm problem, especially of related problems that appear in literature since 2001. These problems are based on a computation of Weil and Tate pairing on eliptic curves. We give a view of these problems including some reductions. We mention some chosen schemes based on these problems that are iteresting because of their practical parametrs, primaci of security proofs or because these schemes introduced the new problem. We try to cover precisely the most important definitions in this sector of cryptography because these definition are omitted in the literature and it is often left up to reader to presume details by himself.
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název v anglickém jazyce není uveden
Klusáčková, Pavlína ; Pelclová, Daniela (advisor) ; Hajduková, Zdeňka (referee) ; Vízek, Martin (referee)
Early diagnosis of occupational asthma is important especially for the prognosis of this disease. The confirmation of the diagnosis of occupational asthma is sometimes difficult using diagnostic methods available nowadays. That is why searching new methods is very important. Analysis of exhaled breath condensate (EBC) by liquid chromatography combined with mass spectrometry enables the separate detection of cysteinyl leukotrienes (LT) - LTC4, LTD4, LTE4; LTB4 and 8-isoprostane. If patients with occupational asthma and controls were compared, only LTC4 was significantly higher among all EBC parameters studied in asthmatics (despite corticosteroid treatment). This marker could be used in the future diagnostics. Monitoring of 24-hours variability of EBC parameters in patients, in whom occupational asthma is suspected, showed relatively high intraindividual and interindividual variation. It is evident therefore, that if only one daily measurement in asthmatics would be possible (which is common in articles of several authors), it should be collected in the same period of day in all persons. In negative bronchoprovocation tests significant changes of EBC parameters were not found. The evaluation of positive bronchoprovocation tests was limited by small number of patients, however in five persons from six, the...
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The possibilities of use of the robotic system da Vinci for treatment of localized prostate tumor
Podzimek, Michal ; Kočárek, Jiří (advisor) ; Kolombo, Ivan (referee)
Cancer of prostate is the most frequent male malignity and also it is the second most common cause of death in Europe and in the USA. There are 2 228 new cases reported in the Czech republic per year. The probability of occurrence of this disease is one to six during whole life. There is a good success in detection of his disease in the early stage due to development of screening methods. In such case the radical prostatectomy is very successful method of treatment. Besides of operation methods like open radical prostatectomy and laparoscopic prostatectomy there is a new operation method using robotic system da Vinci. The aim of this machine is to bring the advantages of the miniinvasive surgery together with keeping intuitive handling like in open surgery. First da Vinci system was bought and installed in the Central military hospital in Prague, Czech republic in 2005. The common knowledge about using this method is very low in both general public and specialists. Nor patients, neither their doctors often know about possibility of surgery using da Vinci system. The main objective of this thesis is to evaluate almost three years of experience of treatment localized prostate tumor using da Vinci system, and to describe its possibilities, benefits and disadvantages. Collection of 255 patients files aged...
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The leveling of the newly stabilized elevation points in RA Detmarovice in 2016
Kajzar, Vlastimil ; Waclawik, Petr ; Staš, Lubomír
In the northern area of mining areas Doubrava and Karvina mines on the border RA Detmarovice and Doubrava are implemented, the mining activities. For this reason, in order to detect possible effects of the mine to the surface and surface objects twice a year height focuses, points in this area stable. From 2014 he was a contractor for these works chosen by the Institute of Geonics, v.v.i., Ostrava. The measurement results are annually presented in the final report - elevation measurements in the northern area of mining areas Doubrava and Karviná Mines I. In 2016, the existing network of height points in a cadastral municipality Dětmarovice expanded by 11 new points. New points are stabilized by means of steel bench mark on objects. Elevation point near house No. 713 is a stabilized form of measuring support cast-in steel casing
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New proposals for hash functions
Sušil, Petr ; Tůma, Jiří (advisor) ; Holub, Štěpán (referee)
Hash functions are an important cryptographic primitive. They are used as message authentication codes, manipulation detection codes and in many cryptograhic protocols. This thesis gives an explanation of the recent generic attacks against hash functions. It also explains the attack against authentication hash function COMP128, which was being used til 2002 in GSM network. The thesis also discusses possible flaws in a new authentication hash function SQUASH designed for an RFID chip.
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Molecular and Biochemical Features of Threee Enzymes that May Serve as New Drug Targets in Cryptosporidium Parvum
Čtrnáctá, Vlasta ; Staňková, Marie (advisor) ; Kraml, Jiří (referee) ; Nečas, Emanuel (referee)
Molecular and biochemical features of three enzymes that may serve as new drug targets in Cryptosporidium parvum Cryptosporidium parvum is a unicellular, obligatory and intracellular parasite belonging to the Phylum Apicomplexa. This parasite can infect both humans and animals, causing an acute diarrhea in immunocompetent persons, and a chronic life threatening infection in immunocompromised individuals. Although many drugs, to combat this parasite, have been empirically tested, there is no completely effective therapy to treat cryptosporidiosis in humans or animals. In recent years, the completion of the genome sequencing projects in C. parvum and C. hominis along with advances in molecular methods have significantly helped to increase our general understanding of the C. parvum metabolic machinery. However, our knowledge concerning many specific pathways and enzymes in Cryptosporidium is still limited. Their better understanding in this organism would aid in experimentation of new drugs and new strategy development to treat cryptosporidiosis in humans and animals. In this dissertation, three essential metabolic enzymes of C. parvum have been tested: Pyruvate:NADP + oxidoreductase (PNO) is a unique, core metabolic enzyme, responsible for converting pyruvate to acetyl-CoA. It is a rare fusion of an...
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Design of technology unit for removal of persistent pollutans for thermal processing of contaminated biomass
Plch, Michal ; Máša, Vítězslav (referee) ; Pařízek, Tomáš (advisor)
The Diploma’s work deals with design to use new methods of cleaning the combustion products for the incinerator of biomass, which guarantees removal of dioxins from the combustion products. Thesis depicts methods of cleaning the combustion products, like ADIOX, using ceramic filters, catalytically filters and methods REMEDIA. Thesis compares constituent methods in terms of effectiveness and according to economic analysis applicable to incinerator of biomass-power output 1 MW. Thesis acquaints with the conception of biomass and with thermic processing, which produces dioxins. Thesis processes using biomass in Czech Republic and plan for using in the future. Thesis processes detailed model of filter using the fabric filters REMEDIA. Suggestion of position of the filter and it is connection to original products line of cleaning the combustion products. Increased pressure loss of the new pipework way and increased consumption of ventilator incinerator is calculated for the new connection. In quest of decreasing the thermal loss of combustion products and in quest of increasing safety of operation is calculated and in quest of increasing safety of operation is calculated proposal of isolation for the filter and pipework. In the end of the thesis is depicted using the technology for decreased amount of dioxins from the fly ash from dioxin filter.
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The machining of electrical insulation materials
Svoboda, Marek ; Prokop, Jaroslav (referee) ; Osička, Karel (advisor)
This work aims to provide an analysis and definitions of problems during the machining of electrical insulation composite materials. The main objective of this work is to put forward innovative alternatives in order to deal with technological conditions. The chosen alternative is then subjected to both testing and economic evaluation.
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