Network Protocol Analyzer

Tato práce se zabývá problematikou identifikace síťových protokolů postavených nad protokoly rodiny TCP/IP. První část popisuje možné techniky a postupy identifikace, které jsou následně využity při návrhu analyzátoru síťových protokolů. Další část je věnována implementaci a testování navrženého analyzátoru. Tento analyzátor je určen pro operační systém GNU/Linux a využívá především knihoven libpcap a libpcre. V závěru práce jsou řešeny výsledky rychlosti a přesnosti identifikace, problémy a možná vylepšení.The thesis deals with the identification of network protocols, which are superior to the family of TCP/IP protocols. The first part of the work describes possible techniques and identification procedures, which are afterwards applied in design of the network protocols analyzer. Next part of the work is engaged in the implementation and testing of the analyzer. The abovementioned analyzer is intended for GNU/Linux and for its work makes use of libpcap and libpcre libraries. In the conclusion of the thesis there are discussed results of speed and precision, occurred problems and possible improving of the program.

The use of augmented reality in population protection

Cílem této bakalářské práce je provést na základě zjištěných poznatků studii možných směrů využití technologie rozšířené reality v ochraně obyvatelstva. Tato imerzní technologie využívá moderních zobrazovacích možností doplněním záběrů reálného světa o vrstvu digitálních dat a zprostředkovává tak uživateli vjem z reálného prostředí obohacený o osobně nezjistitelné informace. Ochrana obyvatelstva je odvětvím, kde je možno využít rozšířenou realitu nejen pro zatraktivnění a zvýšení zájmu o ni samotnou u civilních občanů, ale má potenciál pro využití rozšířené reality i pro zefektivnění provádění jednotlivých svěřených úkolů na poli činností směřujících k maximální možné ochraně života a zdraví obyvatel státu.The aim of this bachelor thesis is to make a study of possible directions of the use of augmented reality technology in the protection of the population based on the findings. This immersive technology takes advantage of modern imaging capabilities by supplementing real-world imagery with a layer of digital data, thus providing the user with a perception of the real environment enriched with personally undetectable information. Public protection is a sector where augmented reality can be used not only to make it more attractive and to increase the interest in it among civilians, but also has the potential to use augmented reality to make the implementation of individual tasks more efficient in the field of activities aimed at the maximum possible protection of the life and health of the population of the state.050 - Katedra ochrany obyvatelstvavelmi dobř

Application of Financial Analysis in a Company

Bakalářská práce hodnotí finanční situaci firmy OHL ŽS, a.s. v letech 2004 až 2007. Na základě finanční analýzy – analýza absolutních, rozdílových, poměrových ukazatelů a soustav poměrových ukazatelů – zhodnotím situaci a navrhnu doporučení na zlepšení.This bachelor thesis deals with financial situation of company OHL ŽS, a.s. during period 2004 – 2007. Evaluation based on absolute, differential, relative indexes and the analysis of system indexes. It includes also suggestion of improvement of financial situation.

Ferric Reducing Antioxidant Power and Square Wave Voltammetry for Assay of Low Molecular Weight Antioxidants in Blood Plasma: Performance and Comparison of Methods

The purpose of the present study was to employ two methods—square wave voltammetry (SWV) performed on screen printed sensors and ferric reducing antioxidant power (FRAP)—as suitable tools for the assay of low-molecular-weight antioxidants (LMWAs). LMWAs were assayed by both methods and the resulting data were statistically compared. Plasma samples from five Cinereous vultures accidentally intoxicated with lead were used to represent real biological matrices with different levels of LMWAs. Blood was collected from the birds prior to and one month after treatment with Ca-EDTA. SWV resulted in two peaks. The first peak, with the potential value of 466 ± 15 mV, was recognized as ascorbic and uric acids, while the second one (743 ± 30 mV) represented glutathione, tocopherol, ascorbic acid and in a minor effect by uric acid, too. Contribution of individual antioxidants was recognized by separate assays of LMWA standards. Correlation between peaks 1 and 2 as well as the sum of the two peaks and FRAP was analysed. While peak 1 and the sum of peaks were in close correlation to FRAP results (correlation coefficient of 0.97), the relation between peak 2 and FRAP may be expressed using a correlation coefficient of 0.64. The determination of thiols by the Ellman assay confirmed the accuracy of SWV. Levels of glutathione and other similar structures were stable in the chosen model and it may be concluded that SWV is appropriate for assay of LMWAs in plasma samples. The methods employed in the study were advantageous in minimal sample volume consumption and fast acquisition of results

New Urea Derivatives Are Effective Anti-senescence Compounds Acting Most Likely via a Cytokinin-Independent Mechanism

Stress-induced senescence is a global agro-economic problem. Cytokinins are considered to be key plant anti-senescence hormones, but despite this practical function their use in agriculture is limited because cytokinins also inhibit root growth and development. We explored new cytokinin analogs by synthesizing a series of 1,2,3-thiadiazol-5-yl urea derivatives. The most potent compound, 1-(2-methoxy-ethyl)-3-1,2,3-thiadiazol-5-yl urea (ASES - Anti-Senescence Substance), strongly inhibited dark-induced senescence in leaves of wheat (Triticum aestivum L.) and Arabidopsis thaliana. The inhibitory effect of ASES on wheat leaf senescence was, to the best of our knowledge, the strongest of any known natural or synthetic compound. In vivo, ASES also improved the salt tolerance of young wheat plants. Interestingly, ASES did not affect root development of wheat and Arabidopsis, and molecular and classical cytokinin bioassays demonstrated that ASES exhibits very low cytokinin activity. A proteomic analysis of the ASES-treated leaves further revealed that the senescence-induced degradation of photosystem II had been very effectively blocked. Taken together, our results including data from cytokinin content analysis demonstrate that ASES delays leaf senescence by mechanism(s) different from those of cytokinins and, more effectively. No such substance has yet been described in the literature, which makes ASES an interesting tool for research of photosynthesis regulation. Its simple synthesis and high efficiency predetermine ASES to become also a potent plant stress protectant in biotechnology and agricultural industries

2.4-Å structure of the double-ring Gemmatimonas phototrophica photosystem.

Phototrophic Gemmatimonadetes evolved the ability to use solar energy following horizontal transfer of photosynthesis-related genes from an ancient phototrophic proteobacterium. The electron cryo-microscopy structure of the Gemmatimonas phototrophica photosystem at 2.4 Å reveals a unique, double-ring complex. Two unique membrane-extrinsic polypeptides, RC-S and RC-U, hold the central type 2 reaction center (RC) within an inner 16-subunit light-harvesting 1 (LH1) ring, which is encircled by an outer 24-subunit antenna ring (LHh) that adds light-gathering capacity. Femtosecond kinetics reveal the flow of energy within the RC-dLH complex, from the outer LHh ring to LH1 and then to the RC. This structural and functional study shows that G. phototrophica has independently evolved its own compact, robust, and highly effective architecture for harvesting and trapping solar energy

2.4-Å structure of the double-ring Gemmatimonas phototrophica photosystem.

Phototrophic Gemmatimonadetes evolved the ability to use solar energy following horizontal transfer of photosynthesis-related genes from an ancient phototrophic proteobacterium. The electron cryo-microscopy structure of the Gemmatimonas phototrophica photosystem at 2.4 Å reveals a unique, double-ring complex. Two unique membrane-extrinsic polypeptides, RC-S and RC-U, hold the central type 2 reaction center (RC) within an inner 16-subunit light-harvesting 1 (LH1) ring, which is encircled by an outer 24-subunit antenna ring (LHh) that adds light-gathering capacity. Femtosecond kinetics reveal the flow of energy within the RC-dLH complex, from the outer LHh ring to LH1 and then to the RC. This structural and functional study shows that G. phototrophica has independently evolved its own compact, robust, and highly effective architecture for harvesting and trapping solar energy