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Dust-UV interaction
Nouzák, Libor ; Pavlů, Jiří (advisor) ; Žilavý, Peter (referee)
Title: Dust - UV interaction Author: Libor Nouzak Department: Department of Surface and Plasma Science Supervisor: RNDr. Jiri Pavlu, Ph.D. Supervisor's e-mail address: jiri.pavlu@mff.cuni.cz Abstract: Micrometer objects (dust grains) are an integral part of the universe. As other objects in the plasma, these dust grains charge to potencial close to the potencial of the plasmas (in this case, interplanetary plasma). In the universe, the photoelectric charging dust grain dominantes all other charging processes. In general, the resulting charge of dust grain is given by a balance of all processes, which haven't been mostly jet theoretically described. In our laboratory, we are simulating space conditions and measure resulting charge and his changes on a single separated dust grain. This work is partly focused to UV source application and to finishing its electronics, and partly on test measurements and model calculations, connected with newly built experiment (e.g., to estimate effects of backgound currents, surfaces, and the geometry of the dust trap electrodes). The work is finished by the first measurements of glass grain charge under electron bombardment with provisional detection optics. Obtained results are compared with previous measurements on the same type of dust grains. Key words: dust, dusty plasma,...
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Interactive website for teaching of functions at high school
Richter, Jaroslav
The thesis deals with the possibilities of using internet in teaching functions at high school. It is divided in two parts. The available web sites are the topic of the first part. Sites which were found are briefly described and evaluated. This portion concludes with a table providing the evaluation criteria for the sites. The second part of the thesis presents a new function-teaching web site. The features it covers include general function properties, linear function, quadratic function, absolute value function, exponential and logarithmic function, power function and linear rational function. Interactive elements are implemented as JAVA applets. The applets visualize how the particular coefficients affect the graphic course in a rule of function. Every chapter offers a test to check the attained knowledge.
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The beer and the pubs in culture of Czech society
Soudková, Jitka ; Matějů, Martin (advisor) ; Czumalo, Vladimír (referee)
The object of our dissertation is to explore and specify the particular role that beer plays in the Czech culture. It also addresses its historical, social, cultural, and local development. We aimed to examine the function of beer and its cultural configuration; its setting and significance in cultural and social system; and its influence on behavior and experience of individuals. Furthermore, we have focused on both cultural;historical transformation of beer consumption on the Czech historical territory and drinking public spaces - pubs - as active cultural and social institutions. We regard pubs as places where pro;social and reciprocal behavior is accepted and active social interactions are expected to happen. Moreover, we are concerned with claim that roots of Czech national enlightenment lay in rural environment of village inns where Czech language was still widely spoken and preserved. In addition, we describe and assess a development of the brewing industry and related institutions; the status of so;called "barfly" as a particular social and cultural category. Last but not least we mention the gender problematic. In past, it was highly socially inadmissible for women to enter the pub without being accompanied by male counterpart. Therefore, we focused on this matter using heuristic and compilatory...
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Identity, Community and Symbolic Interactionism in the Digital Age
Bartoň, Petr ; Balon, Jan (advisor) ; Mucha, Ivan (referee)
The thesis presents a compilation about social relations and identity formation via digital technology and new media, internet in the first place. The author, with the regard to contemporary processes as globalization and rapid digital technology development, mainly relates to two topics, following the view of complexity, mutual implications, cohesion and conditionality of individual identity, interpersonal relationships and social relations, from the perspective of symbolic interaction theory. The first topic is concerning theories about "virtual" and "disembodied" individual "self", which the author endeavours to disconfirm, using Hansen's concept of a body as a specific image. The second topic describes the forms of interpersonal relationships and social relations - author maintains that the "traditional" views of the latter don't perish, but transform and redefine themselves. Similarly, their embedded "qualities" subsequently don't disapear nor devalue.
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Agent based models of financial markets - rationality and social networks
Popadinec, Martin ; Burian, Jan (advisor) ; Berka, Petr (referee)
In the thesis we focus on involving Agent-based models in modeling financial markets. In Agent-based models of economical systems, often called Agent-based computational economics (ACE), market price is established by actions and interactions of autonomous agents using heuristics or simple decision-making rules. This approach to modeling of financial markets provide us with better understanding of establishing market price then aggregate economical models which focuses exclusively on societally "optimal" equilibria assuming that they are achieved by informed and rational behavior of people. The thesis consists of two main parts. The first one, theoretical, is an introduction to agent based modeling, bounded rationality and social network Our concern in the second part of the thesis is a model of volatility on financial markets. This model is interesting example of agent based approach to creating economical models. However it contains some non-realistic assumption from which the most controversial is the space where agents interacts -- two dimensional lattice. In this part of the work the model is converted from two dimensional lattice to the networks which better corresponds to real social networks but we also experiment with another extension of the agent's decision-making function. The intended outcome of the work is verifying the quality of the model, to learn the effect of our model extensions on price volatility, overview of attributes of the particular networks and discussion whether such models could provide some valuable information to the economist which are interested in financial markets.
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Water Flowing in the Landscape Visualization
Vlček, Adam ; Pečiva, Jan (referee) ; Seeman, Michal (advisor)
This work covers visualization of water flowing in the landscape with focus on displaying the results in real time. For in order to obtain data for visualization also common procedures for artificial terrain and natural looking textures are introduced, as well as simple water flow simulation algorithms. The final objective of this work is to present an interactive environment, which will offer interesting visual output in direct response to the user.
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The effect of environment on the behaviour and welfare dairy cattle
Zetková, Mariana ; Chaloupková, Helena (advisor) ; Valníčková, Barbora (referee)
Behavior and welfare of dairy cattle is determined by many factors of its surroundings. Whether we consider the environment of it´s habitat or stockpeople work. The goal of this thesis is describe influence of the behavior, health and production.
In a stable, there are some important factors. One of them is a micro-climate. Cattle is very liable to body-heat stres, because of its not-so-good body heat draining. Another thing stockpeople should focus on is bedding. Wet or pouled bedding is not only uncomfortable, but it also can cause lactal glad and lower limb health problems. Limping and udder infection are very frequent problem of cattle breeding.
In matter of cattle´s social behaviour, we must consider a it´s sense for hierarchy. Make groups by cattle´s age, size, or lactal phase and by other features. Enouhg space for feeding and a rest, to pretend any mutual aggressive interaction thus avoid stres or injuries of cattle.
Although a care and an attitude of stockpeople is being underetimated in many cases, they play a big role in animal breeding. The behaviour of stockpeople, for example, has an influence on animal´s feelings about people. If a milker is calm and has positive attitude, cows are more accessible and calmer while are giving milk. That affects milk production and cow´s mood as well.
A frequent topic to debate is prenatal stres of dairy cows. It is cause of taking calves away from their cow mother. However, opinions on this theme aren´t united and this topic is, as is stated at the beginnig of this paragraph, full of contradiction.
If we want to provide comfort to dairy cows, the main target is to provide them a proper place to sleep in, rest in, feeding, to care about their bodies, etc. That also means, that we should provide them the oportunity to natural behaviour and treat them as living beings, that percieve stimulus from their environment.
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Interactive website for teaching of functions at high school
Richter, Jaroslav ; Slavík, Antonín (referee) ; Robová, Jarmila (advisor)
The thesis deals with the possibilities of using internet in teaching functions at high school. It is divided in two parts. The available web sites are the topic of the first part. Sites which were found are briefly described and evaluated. This portion concludes with a table providing the evaluation criteria for the sites. The second part of the thesis presents a new function-teaching web site. The features it covers include general function properties, linear function, quadratic function, absolute value function, exponential and logarithmic function, power function and linear rational function. Interactive elements are implemented as JAVA applets. The applets visualize how the particular coefficients affect the graphic course in a rule of function. Every chapter offers a test to check the attained knowledge.
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