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A virtual company simulation by means of autonomous agents
Bošanský, Branislav ; Neruda, Roman (referee) ; Brom, Cyril (advisor)
Business process modeling is one of the most used approaches for capturing the work practise. However, if we want to simulate the execution of these processes, the specification based on process modeling is not suitable, because it is usually based on pure statistical calculation. On the other side there are agent-based simulations that provides more realistic model of a simulated system, but the specification of the simulation by means of agents is usually much more complicated. Thus, in this thesis, we address to the interconnection of these two different approaches and examine the possibilities of agents' behaviour definition using an enhanced process modeling language. We follow the EPC language and its epresentation in EPML, which we extend to carry informations necessary for agents, creating that way a new language A-EPML. To prove that this language is capable of being transformed onto the rules determining agents' behaviour, we present the prototype implementation that performs this translation to the final multi-agent system representing a virtual company.
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Integrované podnikové plánování
Jurečka, Peter ; Sedláčková, Helena (advisor) ; Scholleová, Hana (referee) ; Buchta, Karel (referee)
Increasing competitive pressures on most markets force companies to continuously review the effectiveness and efficiencies of their operations. Traditional approach to business planning is becoming insufficient to cope with growing requirements on operational excellence. Concept of Integrated Business Planning (IBP) -- constituting the latest development stage of well-known Sales and Operations Planning (S&OP) -- is proposed as the right response on how to master the challenges of globalized economy in this field. The thesis combines theoretical analysis of inefficiencies of traditional S&OP with applied research realized on the case from real business environment. Microeconomic optimization models are employed to demonstrate the sub-optimal outcomes resulting from the lack of cross-functional integration and potentially antagonistic incentives in business planning. Overview of latest best practices in this area further complements the theoretical part of the thesis. Empirical part of the study summarizes author's experience from leading the large scale implementation of IBP concept in the multinational company. Theoretical assumptions of financial benefits of IBP implementation are tested against empirical observations via usage of statistical apparatus. This part may also be viewed as detailed guideline describing the project of IBP implementation. As a result, integrated approach to business planning proves to bring measurable financial as well as non-financial improvements for the company.
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Smoking prevalence among high school and university students
Pokorná, Lenka ; Kotlářová, Jana (referee) ; Klusoňová, Hana (advisor)
POKORNÁ, L. Prevalence of smoking among high school and university students. Hradec Králové 2010. Diploma thesis. Charles University in Prague. Faculty of Pharmacy. Department of Biological and Medical Sciences. Thesis advisor: RNDr. H. Klusoňová. Ph. D. Keywords: smoking, nicotine, prevalence, addiction, treatment According to World Health Organization more than 5 million people die every year due to the consequences of smoking. It is estimated that the tobacco epidemic will have as many as 1 billion victims in the 21st century. The aim of the thesis is to chart the prevalence of smoking among high school and university students and to determine the level of addiction among smoking students and the age of their first smoking experience. The research examination was made by using a questionnaire. The results prove the fact that the prevalence of smoking among young people is growing. The risk age of the beginning of the addiction is at the age between 14 and 15. Despite the fact that most respondents are convinced that their chance to get rid of the nicotine addiction is big, only a few of them stopped smoking. The finding that the respondents that stopped smoking and then relapsed did not seek medical advice is alarming as well. Nicotine addiction has a demonstrably negative effects on human...
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Ramseyovské otázky v euklidovském prostoru
Cibulka, Josef
One of the problems in Euclidean Ramsey theory is to determine the chromatic number of the Euclidean space. The chromatic number of a space is the minimum number of colors with which the whole space can be colored so that no two points of the same color are at unit distance. We prove that the chromatic number of the six-dimensional real space is at least 11 and that the chromatic number of the seven-dimensional rational space is at least 15. In addition we give a new proof of the lower bound 9 for the chromatic number of the five-dimensional real space. We also simplify the proof of the lower bound 7 for the four-dimensional real space. It is known that the chromatic number of the n-dimensional real space grows exponentially in n. We show some of its subspaces, in which the growth is slower than exponential. We also summarize previous results for normed spaces in general and for some interesting non-Euclidean spaces.
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Volatility modeling : evidence from CEE stock markets
Brabcová, Eva ; Bubák, Vít (referee) ; Baruník, Jozef (advisor)
The thesis applies newly developed heterogenous autoregressive model of realized volatility on high frequency data of three stock market indices: Prague, Budapest and Warsaw with the aim to capture behavior of three different market participants and to quantify their role in forecasting daily realized volatility. Also, the presence of jumps in volatility is investigated and the predictive power assessed. In addition, wavelet analysis is used to detect periods and frequencies of comovements between the three indices. The main contribution of the thesis lies especially in its primary empirical analysis conducted in CEE region. The estimation results indicate that future realized volatility is determined very similarly in all markets with an insignificant impact of participants trading on monthly basis. Moreover, occurrence of a jump proves to be of a high relevance when predicting future volatility. Moreover, wavelet analysis indicates a strong degree of comovement at a frequency of few months across the whole period examined.
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Mathematical and computational modeling of shape-memory alloys
Benešová, Barbora ; Roubíček, Tomáš (advisor) ; Krejčí, Pavel (referee) ; Stefanelli, Ulisse (referee)
This dissertation thesis is concerned with developing a mesoscopic model for sin- gle crystalline shape-memory alloys including thermo-dynamically consistent thermo- mechanical coupling - here the term "mesoscopic" refers to the ability of the model to capture fine spatial oscillations of the deformation gradient by means of gradient Young measures. Existence of solutions to the devised model is proved in a "phase-field-like approach" by a scale transition from a microscopic model that features a term related to the interfacial energy; this scale transition from a physically relevant model justifies the mesoscopic relaxation. Further, existence of solutions is also proved by backward- Euler time discretization which forms a conceptual numerical algorithm. Based on this conceptual algorithm a computer implementation of the model has been developed and further optimized in the rate-independent isothermal setting; some calculations using this implementation are also presented. Finally, refinements s of the analysis in the convex case as well as a limit of the phase-field-like approach in this case are exposed, too.
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Childhood in the Middle Ages
Sládek, Pavel ; Matějek, Marek (advisor) ; Eliáš, Vojtěch (referee)
Title: Childhood in the Middle Ages keywords: marriage family childhood differences between female and male children education This thesis aims to describe the life of children in the Middle Ages. Due to the woman's inferior social status, female children had a more difficult position than males. This is then reflected in access to education. While young men went to university, young women stayed at home and learnt all they would later need in their married lives. Nevertheless, differences in individual families' approach to children must not be overlooked. Royal offspring would be used to further the interests of their fathers; their childhood was therefore virtually non-existent. Children from poorer families would have to take part in their parents' labours and how much time they were able devote to children's games still remains a big unknown. Some contemporary sources mention children's games and archaeological excavations prove the existence of children's toys. However, children were generally viewed as small adults and parents would wish their small children to grow up into independent adults as soon as possible. This desire was also due to high infant and child mortality. In conclusion, although childhood would most likely have existed in the Middle Ages, it only could have done so in a...
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Security in wireless networks
Mlčochová, Ivana ; Peterka, Jiří (referee) ; Janeček, Jan (advisor)
The more the popularity of wireless networks grows the more threatsb appear of being attacked or misused, either intentionally or by accident. This bachelor work describes security protocols in use, such as WEP, WPA and WPA2, analyses their vulnerabilities and discusses the danger of possible attacks against them. As the security protocol itself cannot entirely protect any wireless network there are additional security measures suggested that minimize the risk of an successful attack. One of the goals was to prove experimentaly that WEP is really as bad a protocol as it is said and should not be used for securing any networks not even the home ones. In connection with that a survey has been made examining how wireless networks in Prague are secured, what protocols are used. This survey showed an alarming fact that most wireless networks are still using deprecated protocol WEP or no security protocol at all.
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Methodology of internet research
Procházka, David ; Remr, Jiří (advisor) ; Tuček, Milan (referee)
The origin of the Internet dates back to as early as 1969 when several computers were successfully connected without employing any central unit. However, it hadn't seen any substantial development until 1989 when the web pages came. Thanks to a dynamic development, it has reached an almost global expansion since then. The permanently growing number of interested users has gradually involved also social scientists. Originally, the Internet was perceived as interesting in itself, but in the course of time it has become also a methodological tool used in investigations into social issues. This paper deals, first of all, with the Internet as an option to use in data capture. It defines advantages and drawbacks of this tool in terms of social research. Its focus is on the elimination of risks and disadvantages related to this methodology. Further, it specifies some basic rules, which a researcher should follow when designing an internet research and creating a questionnaire. This work addresses principles related mainly to a quantitative research, however, in the last part there are also some possibilities to a qualitative or mixed research suggested. Powered by TCPDF (www.tcpdf.org)
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