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Theoretical Background for Predicting the Properties of Petroleum Fluids via Group Contribution Methods
Bogdanić, Grozdana ; Pavlíček, Jan ; Wichterle, Ivan
The major problem encountered in the petroleum industry lies in the proper thermodynamic representation of rather complex fluids. In this work, the UNIFAC group contribution method for predicting the properties of such fluids has been exploited as a basis for their description in terms of model compounds. Standard thermodynamic procedures are used to estimate the critical properties, acentric factors, and molecular weights for the model compounds. In such a way, the already available generalized methods can be used for calculations of the phase equilibrium in complex petroleum mixtures.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22012102413400 - PDF
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Global value chains in the coffee industry focused on Vietnam
Klumparová, Adéla ; Vlčková, Jana (advisor) ; Hnát, Pavel (referee)
Aim of this diploma thesis is to describe functioning of global coffee value chains and this knowledge then apply to the coffee industry in Vietnam which serves as a case study. The introductory chapter focuses firstly on institutional background of value chains, processes and management processes used in the agricultural industry. The thesis also contains analysis of global coffee value chain, including the identification of entities engaged in the chain and their contribution to the creation of added value. Next chapter describes the development of the world coffee market and production of the world's major producers and exporters of coffee. The thesis also deals with the topic of economic and social sustainability and the impact of global value chains on the environment. Final part of the thesis concentrates on the position of the coffee industry in Vietnam, its structure and development over the past 40 years. Attention is paid also to a problematic position of small growers or to the opportunities of the development of the local coffee industry.
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Strategic Trade Policy in Defence and Security Industry
Neumannová, Pavla ; Žamberský, Pavel (advisor) ; Jiránková, Martina (referee)
The master thesis is devoted to a nontraditional, however, in the todays world to a very current topic, arms industry and its support. The thesis connects the theoretical concept of the strategic trade policy (defined by P. Krugman or J. Brander) to its practical interpretation and application in the defence and security industry. The first chapter explains the strategic trade policy using the Brander Spencer analysis. The topic of the second chapter is strategic industries and this chapter answers the question whether the defence and security industry is a strategic industry or not. The third chapter analyses the possibilities of the support of DSI and compares approaches of different EU member states. The last chapter is devoted to the solution of this problem. The main contribution of this thesis is a new interpretation of the strategic trade policy, analysis of the importance of the defence and security industry and its support and suggestion of practical measures for Czech companies and for the Czech Ministry of Defence.
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Design of a methodology for BI solutions in QlikView environment
Judová, Eva ; Pour, Jan (advisor) ; Kunst, Jan (referee)
This master thesis is devoted to a design for methodology of BI projects in QlikView. The main aim is to propose a recommended procedure solutions reflecting the strengths and weaknesses in the development of QlikView applications. Accompanying chapter to the discussed issue is a chapter Business Intelligence which explains the principles, characteristics and reasons for implementation in companies. Part of defining the differences between traditional and self-service solutions serves as a theoretical basis for understanding the increasing attractiveness of self-service solutions and environment of the proposed methodology. The next chapter presents the company Qlik as a market leader in BI and the owner of QlikView. The reasons for its establishment, subsequent development and actual vision are listed to create a comprehensive view of the environment where the described product was created. Along with the chapter focusing on characteristics and main advantages of QlikView a knowledge base is established for the implementation of proposed methodology. Crucial chapter of this thesis is based on the author's experience gained while implementing QlikView projects. The proposed methodology is based on the description of each phase, its activities, inputs and outputs and its concrete application in a demo environment for the area of receivables in manufacturing company. The key contribution of the author is pointing out potential problems during development or warning about critical parts or providing appropriate recommendations and benefits of the proposed procedures. The designed methodology can serve as a useful guide for self-service projects implemented the QlikView environment.
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Micro-electromembrane extraction across multiple aqueous and organic phases for selective pretreatment of raw biological samples
Kubáň, Pavel ; Boček, Petr ; Seip, K. F. ; Gjelstad, A. ; Pedersen-Bjergaard, S.
Micro-electromembrane extraction (μ-EME) across multiple aqueous and organic\nsolutions was developed for selective extractions of various analytes from untreated\nbiological samples. The novel approach requires μL volumes of samples and organic\nsolvents, which form consecutive immiscible plugs in a transparent polymeric capillary\nand the extraction process is accelerated by application of d.c. voltage. Number of the\nplugs, their composition, volume and sequence in the extraction capillary can be chosen\nspecifically for each particular application and high variability and selectivity of the\nextraction process can be achieved. In this contribution, we demonstrate suitability of\na five-phase μ-EME system for simultaneous extractions of cations and anions from\nurine and for selective extractions of basic analytes based on their acid-base strength\nfrom plasma.
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Organic markers and compounds in PM1 aerosol in small town near Prague (Czech Republic) in winter 2016
Křůmal, Kamil ; Mikuška, Pavel ; Coufalík, Pavel ; Večeřa, Zbyněk
Contribution summarizes the concentrations of monosaccharide anhydrides, resin\nacids, methoxyphenols, monosaccharides, disaccharides, sugar alcohols, alkanes,\nhopanes, steranes and polycyclic aromatic hydrocarbons in PM1 aerosols in small town\nKladno-Švermov in winter. According to concentrations of organic markers, the\nidentification of emission sources in Kladno-Švermov is discussed.
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Permeation of VOC vapours through carbon nanotube network membranes controlled electrically
Slobodian, P. ; Říha, Pavel ; Olejník, R.
In this letter, we report the increase of permeation rates of some typical volatile organic compounds through entangled carbon nanotube networks by an electric current. The change in the permeation rate is reversible when the\ncurrent is turned off. The permeation rise is partly probably due to Joule effect and thus increased membrane temperature and vapor pressure in the vicinity of the inlet side of membrane. However, the effects of vapor polarity and electrostatic interaction of vapors and charged nanotubes seem to be also involved and contribute to the differentiation between alcohol and carbohydrate vapors permeation.
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Czech television and it's content for Generation Y
Jůzová, Klára ; KRUML, Milan (advisor) ; Zlatušková, Kamila (referee)
This thesis focuses on the changes the television industry has undergone in recent years. The aim of the thesis is to define a specific audience group and its preferences: the current generation of young people aged between 15 and 35 who belong to the sociological group called "Generation Y". The thesis contributes to knowledge by examining how the public Czech Television (CT) understands and addresses the needs of this specific audience group.
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NUMERICAL ESTIMATION OF MICRO-CRACK PATHS IN POLYMER PARTICULATE COMPOSITE
Majer, Z. ; Náhlík, Luboš
Determination of composite mechanical behavior is one of important part during the composite tailoring. The aim of the present work was to estimate a micro-crack behavior in a polymer particulate composite. The composite was investigated by means of the finite element method -using ANSYS software. A two-dimensional three-phase finite element model was developed to analyze the crack growth behavior. The assumptions of the linear elastic fracture mechanics were considered and the Maximum Tangential Stress (MTS) criterion was used to predict the direction of the crack propagation. The effect of the elastic modulus of the interphase on the micro-crack propagation was investigated. The properties of matrix and particles were taken from experiment. It was shown that the interphase properties influence the stress intensity factor KI as well as the micro-crack paths. The results of this paper can contribute to a better understanding of the micro-crack propagation in particulate composites with respect to the interphase.
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