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Building and use of smaller computer networks
Kyzivát, Marek ; Pinkas, Otakar (advisor) ; Šmejkal, Ivo (referee)
The thesis describes the initial state of the computer network Basic Schools and Kindergartens Ohradní (ZŠMŠ Ohradní) in Prague 4 and then its reconstruction, which I largely contributed. ZŠMŠ Ohradní consists of four pavilions and from one building on the other side of the street. The aim of this study is to assess the initial state of the network and point out the shortcomings that we discovered. We found deficiencies in the operation stress tests, measurements and data cabling overall analysis. Original networks connectivity was 100Mb/s. Together with a colleague, we are network administrators. Furthermore, I am going to introduce a new form of network, which has identified deficiencies improved, by using on newer technologies. I will describe its structure, address allocation, active and passive components, and operated services. New network is capable of 1Gb/s, and its spine is going to be 10Gb/s soon. Benefits of this reconstruction is faster, more stable and more modern network that will facilitate the work of employees of ZŠMŠ Ohradní. To these improvements, I have mainly contributed by measurements. I participated in the design and implementation of new form of data network. I collaborated with fellow Poc to the configuration of active elements and network services in reconstructed network.
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The Asian financial crisis and post-crisis development of newly industrialized countries of Asia
Panchenko, Victoria ; Bolotov, Ilya (advisor) ; Černá, Iveta (referee)
This thesis analyzes the Asian financial crisis by providing a comprehensive view of the development of the economies of the Asian newly industrialized countries before and after the outbreak of the crisis. The aim of this paper is to explore and understand the causes of the crisis and derive practical lessons. The work is structured as follows. The first chapter is theoretical and defines newly industrialized countries by focusing on the characteristics of the economic and social status of these countries in a period of prosperity. The second chapter examines the financial crisis in 1997 - its origin, causes, indicators and progress. The last chapter discusses the impact of the crisis both on countries of Southeast Asia and on the world economy overall. Afterwards, summarizing of the lessons that can be learned from the Asian financial crisis and that remain urgent even nowadays is outlined.
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Sorption and Stabilization of Metals/Mettalloids by Innovative Synthesized Sorbent Amochar.
Ouředníček, P. ; Trakal, L. ; Komárek, M. ; Pohořelý, Michael
Remediation of contaminated soil which is based on stabilization and immobilization of potential\nhazardous substance by sorption materials has been studied intensively nowadays. Biochar – activated organic carbon belongs to this group of stabilizing agents which can adsorb wide range of contaminants, including metals/metalloids. Surface area of the biochars is quite large in general and functional groups (e.g. COO–) can form chelates or alkaline elements on the surface, which is represented by cation exchange capacity. Altogether with the high pH values (7.00 – 10.00), biochars are quite effective sorbents and can adsorb metals/metalloids from the solution (ground water), especially in acidic soils (in the environments affected by intensive mining activities). Sorption\neffectiveness can be increased (especially for As (V) or Cr (VI) sorption) by modification of biochar by various types of secondary oxides. Innovative sorbent AMOchar (AMO + biochar) has been synthesized currently. The product was prepared by adding of biochar to the reaction solution during amorphous manganese oxide (AMO) synthesis. The AMOchar was formed mainly by Mn-oxalates which had coated surface of the pristine biochar. AMOchar composite was able to remove significantly higher amounts of various metal(loid)s from the solution despite the rather high pH of the material. Sorption effectiveness was high not only in case of Pb (II) sorption (almost 99%), and Cd(II) (51.2%), but also a very high amount of As(V), 91.4%. Additionally, both AMOchar composite was able to reduce Mn leaching. This can avoid potential post-contamination caused by the dissolution of less stable Mn-oxalates as observed in the pure AMO.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_22316111113040 - PDF
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Nové postupy biomonitoringu cizorodých látek ve vodním prostředí
ČERVENÝ, Daniel
Within the presented work, several approaches of biomonitoring were studied. A well-established method for human health risk assessment was applied to evaluate the quality of fish from open waters in the Czech Republic. As this work is targeted on sport fishermen, who frequently consume their own catches, besides the publication in scientific journal, a brochure with results of this study was distributed via the Czech Fishing Union. Health risks for consumers related to the consumption of wild fish were found strongly species and locality dependent. As there is no risks related with the consumption of carp (Cyprinus carpio) at all investigated sites, frequent consumption of predatory fish should be avoided at some fishing grounds. The use of passive samplers has become more and more attractive in the last two decades. As these devices are able to mimic the biological uptake of chemicals, their potential for replacing fish as bioindicators in routine biomonitoring programmes is evident. In our study, the comparison between analysis of fish tissues and POCIS extracts from selected sampling sites confirms this idea about interchangeability of these indicators in the case of PFASs as target pollutants. Moreover, no metabolic transformation of contaminants present in water take place in passive samplers contrary to living organisms, thus these reflect the actual contamination at the locality more precisely. The use of passive samplers completely fulfils the internationally accepted principles of Replacement, Reduction, Refinement (the three R´s). Another promising approach using YOY fish as bioindicators was evaluated within the present study. Multispecies samples of YOY fish homogenate was found as a better indicator for wide range of pollutants than muscle tissue of adult fish within one species from the same locality. As all inner organs and tissues are presented in analysed samples, more target pollutants in higher concentrations are detected compared to the muscle of adults. Besides the higher sensitivity in pollutants detection and quantification, practical and economic benefits are of concern in the case of the YOY fish approach. The YOY fish approach also particularly fulfil the three R´s strategy, as sampling of this age group of fish has a smaller impact on the environment than the sampling of adults. In case of mercury, that was found as a limiting contaminant for the consumption of fish from open waters in the Czech Republic, a nonlethal method of finclips sampling can be used for the monitoring of this compound in aquatic environments. Besides the monitoring, our optimised method for the estimation of muscle tissue concentrations could be used for human health risk assessment as well. The difference between real muscle concentrations and concentrations estimated using our method differs less than 10% in most of the investigated localities. Benthic organisms are an important part of the food web in aquatic environments, but insufficient information about its contamination is available. In another study included in this thesis, first evidence about bioaccumulation of certain pharmaceuticals in benthic organisms was described. Although, pharmaceuticals are generally considered to be not accumulative in organisms, our study proved that certain pharmaceuticals have bioaccumulation potential. From this finding, it is evident that not only the concentrations of pharmaceutical dissolved in water but also the diet represents an important exposure pathway of contamination by these compounds for organisms (fish) inhabiting aquatic environments.
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New trends in consumer behavior when purchasing food
Radoušová, Eva ; Hes, Aleš (advisor) ; Petr, Petr (referee)
This master thesis deals with consumer behavior when purchasing food. For the purpose of this thesis students from the Central Bohemia Region are chosen as a selected group of consumers.
The theoretical part sums up the knowledge related to the shopping behavior of consumers when buying food and influences on this behavior. The second part analyzes the shopping habits of the selected group of consumers. Shopping behavior is examined in terms of frequency of purchase, place of purchase, the most frequently purchased food categories, the main decision criteria when buying food, the impact of advertising and promotional discounts, the importance of information on food composition and the country of origin, interest in organic food and healthy lifestyle, willingness to try new food and approach to food purchases on the internet.
The final part interprets the new trends in consumer behavior of the selected group of consumers and formulates a set of recommendations both for the selected group of consumers and for food retailers.
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New cryoprotectives in preservation of potentially probiotic bacteria of Bifidobacterium genus using freeze-drying procedure
Vrabcová, Petra ; Killer, Jiří (advisor) ; Jakub, Jakub (referee)
The probiotic bacteria of the genus Bifidobacterium are especially used in the dairy and pharmaceutical industry. They are present in the form of viable cells in pro(syn)biotic fermented milk, dried and freeze-dried products for its positive effects on the health. Lyophilization represents one of the widely used methods for long-term preservation of bifidobacteria. The lyophilization process is challenging, but very needed, and for this reason it is still necessary to explore new cryo(lyo)protective substances, which protect the microbial cultures more effectively before the negative effects of cryopreservation and lyophilization.
The aim of the thesis was to test the various mixtures of substances containing specific oligosaccharides, which have prebiotic properties, from the point of view of their potential cryo(lyo)protective effect of lyophilization process. For the purposes of the study, twelve bifidobacterial strains of human and animal origin were selected. As a potential cryo(lyo)protectives were used solutions on the basis of 5x concentrated TPY medium with addition of FOS, 10% fructooligosaccharides (FOS) and the solution on the basis of porcine gastric mucin. Number of viable cells was determined in lyophilisates enriched by the concrete solutions in the time intervals (30 days, 3 months and 6 months) after lyophilization and compared with the control lyophilized samples (fresh cultures without the additive solutions). The potential cryo(lyo)protective effectiveness of 5x concentrated TPY medium solution has been demonstrated only in B. boum, B. breve, B. longum subsp. infantis a Bombiscardovia coagulans, where decreased the number of viable cells about four orders of magnitude. The potential cryo(lyo)protective effectiveness in 10% FOS solution was found only in B. thermacidophilum subsp. porcinum and Bombiscardovia coagulans, where was found half the number of viable cells. The highest potential cryo(lyo)protective effectiveness was observed for a solution on the basis of porcine gastric mucin. The highest number of viable cells was demonstrated in B. animalis subsp. lactis, B. boum, B. longum subsp. infantis, B. longum subsp. longum, B. pseudolongum subsp. globosum and B. thermacidophilum subsp. porcinum lyophilisates using this potential cryo(lyo)protective solution.
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Poaching as a health and social problem
KUBOUŠEK, Rostislav
Based on the latest knowledge from work experience and scientific research, the theoretical part of this thesis briefly outlines terms like poaching, game hunting and diseases in game. I concentrated on the description of those diseases dangerous to mankind and affecting its health. The whole thesis focuses on trying to analyse the problem of poaching in depth, pointing out the present state of this issue in the Czech Republic, particularly from the point of view of the health risks as well as from the social and criminal views, mentioning the related ethical and moral issues. The current legal regulations are specified in connection with poaching and the impact of poaching on the economy is also marginally referred to. The objective of the thesis research was to answer the research question, whether poaching has increased within the Region of South Bohemia and whether it can be considered an all-society serious issue. The research procedure used was a secondary analysis of the data gathered by the Police of the Czech Republic, the Czech Ministry of Agriculture and the Czech and Moravian Gamekeepers{\crq} Association. The evaluation of all details gained unambiguously indicates that the issue is a serious one; however a relatively short time has passed since the amendment establishing poaching as a crime to assess objectively the consequences. Current facts nevertheless lay the groundwork for a clear outcome that the amendment establishing poaching as a crime has not been an appropriate solution to the actual situation. Considering the present state of poaching in the Czech Republic and problems related, it can only be stated that the only effective and system solution for the future lies in passing an amendment to the establishing poaching as a crime. Poaching cannot be eradicated within society; it can however be successfully rectified. Poaching has never been and is not a coincidental and sporadic phenomenon - it is going to occur throughout any political regime, irrespective of its repression.
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Micropropagation of Satureja Montana L.
Zunová, Tereza ; Fernández Cusimamani, Eloy (advisor) ; Michaela, Michaela (referee)
Winter savory (Satureja montana L.) is a plant occurring in the Mediterranean and the Black Sea region. For its high content of essential oils is widely used in culinary and traditional medicine.
Savory is propagated generative and vegetative. Seeds germinate slowly, and therefore, the vegetative propagation is faster, especially in in vitro conditions may be propagated a large amount of plant material in a short time.
The aim of this thesis was to investigate the growth effect of cytokinins on regeneration and growth plants from nodal segments of S. montana L.
Nodal segments were cultured on six variants of medium supplemented with 0.5; 1 and 1.5 mg/l 6-benzylaminopurine (BAP) and 0.5; 1 and 1.5 mg/l kinetin (KIN). Variant without growth regulators served as a control. Culture conditions were 25/20 °C day/night, light intensity 3000 lx and daily period of 16/8 hours. After 6 weeks of measurements were evaluated parameters such as: number of shoots, plant height, the number of newly created nodes and the number and length of roots.
In respect of the coefficient of micropropagation (i.e. the number of newly created nodes on the plant) was statistically significantly best variant medium supplemented with 1.5 mg/l KIN where on average create 8.88 +/- 2.87 nodes. At the height of the plant which was highest in the variant with a concentration 1.5 mg/l KIN (2.27 +/- 1.33) and the number of shoots with highest average value in a concentration 1 mg/l BAP (2.87 +/- 1.19) encore of growth regulators were not statistically proven. High concentrations of BAP and KIN inhibited the induction of roots and from variants transferred to ex vitro conditions were regenerated 46 % plants.
Adding BAP and KIN into the medium has an influence on plant regeneration of Satureja montana L.
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Location study of suitable sites for pumped storage power plants
Strnad, David ; Gdulová, Kateřina (advisor) ; Bašta, Petr (referee)
This theses reports on facts about pumped storage power plants. The first part
of the theses introduces us to the importace of hydropower, consists of a description
of historical development of pumping sets, and also defines limitations for its
potential suitable localization.
The research is processed via ArcGIS software and it´s methodologically divided
into three phases. The first phase is searching for the minimum suitable terrain
gradient on the whole Czech landscape and it defines local insterests for the next
phase of research. The second phase is based on limited factors and assesses the
chosen location of interest. The final phase provides detail on the most potentially
suitable destinations with specific locations of pumped storage power plants.
The study resulted in map outputs of final destinations and locations of interest
across the Czech landscape.
The distinction of source data and the importace of classification of enviromental
factors are included in the discussion.
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