|
Clustering and regression analysis of micro panel data
Sobíšek, Lukáš ; Pecáková, Iva (advisor) ; Komárek, Arnošt (referee) ; Brabec, Marek (referee)
The main purpose of panel studies is to analyze changes in values of studied variables over time. In micro panel research, a large number of elements are periodically observed within the relatively short time period of just a few years. Moreover, the number of repeated measurements is small. This dissertation deals with contemporary approaches to the regression and the clustering analysis of micro panel data. One of the approaches to the micro panel analysis is to use multivariate statistical models originally designed for crosssectional data and modify them in order to take into account the within-subject correlation. The thesis summarizes available tools for the regression analysis of micro panel data. The known and currently used linear mixed effects models for a normally distributed dependent variable are recapitulated. Besides that, new approaches for analysis of a response variable with other than normal distribution are presented. These approaches include the generalized marginal linear model, the generalized linear mixed effects model and the Bayesian modelling approach. In addition to describing the aforementioned models, the paper also includes a brief overview of their implementation in the R software. The difficulty with the regression models adjusted for micro panel data is the ambiguity of their parameters estimation. This thesis proposes a way to improve the estimations through the cluster analysis. For this reason, the thesis also contains a description of methods of the cluster analysis of micro panel data. Because supply of the methods is limited, the main goal of this paper is to devise its own two-step approach for clustering micro panel data. In the first step, the panel data are transformed into a static form using a set of proposed characteristics of dynamics. These characteristics represent different features of time course of the observed variables. In the second step, the elements are clustered by conventional spatial clustering techniques (agglomerative clustering and the C-means partitioning). The clustering is based on a dissimilarity matrix of the values of clustering variables calculated in the first step. Another goal of this paper is to find out whether the suggested procedure leads to an improvement in quality of the regression models for this type of data. By means of a simulation study, the procedure drafted herein is compared to the procedure applied in the kml package of the R software, as well as to the clustering characteristics proposed by Urso (2004). The simulation study demonstrated better results of the proposed combination of clustering variables as compared to the other combinations currently used. A corresponding script written in the R-language represents another benefit of this paper. It is available on the attached CD and it can be used for analyses of readers own micro panel data.
|
|
Plan for improvement of internet marketing of chosen engineering company
Pokorný, Zdeněk ; Hinčica, Vít (advisor) ; Olšanová, Květa (referee)
The objective of this bachelor thesis is to evaluate the contemporary usage of internet marketing by company POKORNY, spol. s r. o. and at the same time to suggest its possible further development. Within contemporary usage of internet marketing is analysed company's website on the basis of its overall quality, content and its statistical values. In connection to company's website is subsequently analysed its optimization for search engines as well. Furthermore the thesis analyse usage of 2 social networks, which are Facebook and LinkedIn. Afterwards the thesis suggest possible further development of company's internet marketing which includes recommendation to eliminate discovered current deficiencies and suggestions to start using new available tools. The result of these recommendations should be better competitiveness of the company.
|
|
Comparison of methods of ECLIA and ELISA in determining the beta-CrossLaps
KOŽANTOVÁ, Jana
Osteoporosis is a very old disease affecting a large majority of population. Its occurrence rate has been growing permanently. It is a systemic disease of bones for which the decrease in bone mass, i.e. of inorganic as well as organic bone part is characteristic. Typical symptoms are osteoporotic fractures. To perform an in time diagnostics of the disease, it is necessary to execute the necessary examinations. One of them is also the laboratory determination of markers of bone resorption and new creation for finding out the state of bone metabolism. The target of my bachelor thesis was to find out the level of the bone resorption marker (beta-CrossLaps) by means of ELISA and ECLIA methods on the same serum from patients with the diagnosed osteoporosis and to process statistically the results. In the next part I dealt with the structure and functions of bones. Then I focused on markers of bone formation and resorption. Finally I mentioned the bone metabolism and its control mechanisms. I concentrated mainly on the metabolism of calcium, D vitamin, parathormone and calcitonin. I carried out the practical part of my bachelor's thesis in the accredited private laboratory STAFILA, spol. s r. o. in České Budějovice. The procedure of my work followed the standard operating procedure of the laboratory. In the research, in total 66 serums of patients with osteoporosis were analysed by me. At first, I determined the concentration by beta-CrossLaps method based on the principle of sandwich ELISA on the appliance NexGen Four from TestLine company. Then I analysed the same samples on the automatic analyser IDS-iSYS from IDS company, this time by ECLIA method. Both appliances on which the determination was executed, principles of both methods, applied analytic sets and the procedures of analysis are described in the methodical part. In the next part of my bachelor's thesis, the results of my measuring are stated. At first I entered the concentrations beta-CrossLaps in ng/ml measured by both methods into the table and for the respective samples I stated the sex and years of birth of individual patients. Moreover I prepared a graph illustrating the share of men and women of various age categories in my research. The second graph shows the differences in values of beta-CrossLaps concentrations between both methods. Resulting concentrations were subject to regression analysis. I applied linear regression and Grubbs test for finding out the outlying values excluded from the further statistical processing. I performed Passing-Bablok regression based on the remaining values. As a result of regression equation and 95% CI of the slope B and intercept A, the proportional error of measuring was rejected but on the contrary, the systematic error was confirmed. Correlation coefficient R = 0,97 shows a very good linear dependency between both methods. It turned out by practice in the laboratory that the evaluation of concentrations beta-CrossLaps from the same patients on various appliances may show partially different values. I worked at two different analysers, each of them was based on another principle, with a different sensitivity and calibration. All of this could have the influence on the resulting concentration of individual samples. The advantage of automatic analyser IDS-iSYS is a quicker determination. Moreover it is possible to perform on this apparatus all the possible examination concerning the bone metabolism from D vitamin, parathormone, osteocalcin up to bone markers. It is advantage for the patients with osteoporosis as well as with other metabolic skeleton diseases. It follows from this that all the necessary examinations may be carried out on one apparatus.
|
|
The proposal of CRM strategy in selected company
Gorolová, Pavlína ; Koliš, Karel (advisor) ; Kociánová, Jana (referee)
This thesis discusses the philosophy of customer relationship management. Main goal of the work is to analyze the processes in a specific company and to recommend a solution for customer relationship. Thesis is divided into three parts. Theoretical part presents readers with basic concepts of customer relationship management, its principles, development and strategy. Furthermore, pays attention to customer and their value. Methodical part defines the method of analysis, which is applicated in practical part. Practical part is focused on a specific company, on its introduction, history and analysis of internal and external environment. In conclusion of this thesis individual recommendations and improvement proposals are listed.
|
|
Brand marketing strategy, men´s clothing brand Stones by Steilmann
Pařez, David ; Zadražilová, Dana (advisor) ; Khelerová, Vladimíra (referee)
The aim of my bachelor ´s thesis Brand marketing strategy, men ´s clothing brand Stones by Steilmann Praha is to undertake marketing research of brand and its subsequent evaluation and suggest modifications of marketing brand strategy. The first part deals with consumer issues and consumer behavior, describes what is the brand and its history, defines the brand identity, brand image, awareness and the way of increasing brand value. Further I mention particular steps of the process of the strategic brand management. At the beginning of the following section is the analysis of the current situation on the Czech market with the men´s fashion, introduction of the brand Stones and its history, and description of the competitors. In the next part there is SWOT and marketing mix analysis. Another part of my thesis is marketing research of the brand Stones and evaluation of research results. In the final part I suggest modification of the marketing brand strategy with respect to the survey results.
|
|
Analysis and valuation of the company ELIT CZ, Ltd.
Nováková, Lucie ; Strouhal, Jiří (advisor) ; Smrčka, Luboš (referee)
This thesis deals with methods and options of valuation of companies, valuation process and everything that goes with it. An integral part of the strategic analysis is financial analysis and financial plan to years 2016 - 2020. For the financial analysis following methods have been used: vertical and horizontal analysis, a ratio indexes and the balancing rules. The financial plan has been drawn up by value generators. The aim is to valuate a specific company ELIT CZ, Ltd., which is engaged in the purchase and sale of spareparts for cars. I used to valuation by discounted cash flow method (DCF). The company is valuated to date 31. 12. 2015.
|
|
Creation of the Enterprise Architecture model according to the TOGAF framework
Čapek, Jan ; Doucek, Petr (advisor) ; Zeman, Petr (referee)
The present diploma thesis aims at introducing the Enterprise Architecture and creating an abstract model of a company. The primary focus is on application and process layers as defined in the architecture framework TOGAF. The thesis is divided into theoretical and practical part. The theoretical chapter starts with a business model analysis which means to describe mission vision and companys values as a part of the strategy framework. Furthermore the business processes are described in the latter part of this section. This chapter attempts to explain how to map a business process and to categorize it by nature and maturity level. Penultimate chapter introduces the Enterprise Architecture in general. This section includes arguments as to why the companies should be concerned with the Enterprise Architecture advantages of the Enterprise Architecture implementation into the companys documentation relationship of companys core business and IT and examples of the Enterprise Architecture frameworks. The last chapter deals with the TOGAF framework where Architecture Development Method is described. This means how Enterprise Architecture model is created and how to implement changes into the layers according to the TOGAF framework. Simultaneously the last section of this chapter describes the reference models which provide graphical overview of all abstractions layers. The practical part of the thesis elaborates on the theoretical part using the Architecture Development Method process in order to create the Enterprise Architecture model according to TOGAF framework. Same as the theoretical part it only focuses on the application and process layer. Firstly the business model is decomposed into vision mission and companys values to the companys strategy and business goals in order to grasp further understanding of business processes detailed description. Subsequently the abovementioned aspects are recomposed to create process map which provides the management overview. The application layer undergoes the same process; nonetheless the process map is replaced by information system description and reference model creation. Once the models are created the thesis compares them with the business and strategic goals. The benefit brought by this thesis is critical evaluation of current status to propose changes to achieve target architacture according business and strategic goals established by management.
|
|
Valuation of the company Tank ONO, s.r.o.
Novák, Petr ; Strouhal, Jiří (advisor) ; Smrčka, Luboš (referee)
The output of this Master´s Thesis on the theme "Valuation of the company Tank ONO, s.r.o." is the estimation of market value of company as at the date of December 31, 2014, with the goal of selling off the company to a hypothetical general investor in the future. The theoretical part includes metodology and instruments used for company valuation, eg definition of main terms, explanation of valuation proces and methods, that are recognised as valid by specialised public. Afterwards, the second part (eg practical part) is aimed at applying the metodology in practice. First, the valuated company is shortly introduced and it is followed by financial and strategic analysis in order to evaluate the financial soundness and assess the perspective for company future. The conclusions of the above analysis are used for elaborating the value drivers and complex financial plan, that is followed by valuation of Tank ONO, s.r.o. In light of the company capital structure, there is chosen DCF equity method for final valuation, in this Thesis.
|
|
HYDROGEN ABSORPTION IN A-Co30Fe55B15
Čermák, Jiří ; Král, Lubomír ; Roupcová, Pavla
Hydrogen solved in amorphous alloys (AAs) influences their magnetic characteristics. AAs are also perspective\nas additives that can improve hydrogen storage kinetic in certain types of ball-milled hydrogen storage\nmaterials (HSMs). Therefore, knowledge of hydrogen solubility and hydrogen sorption kinetics in AAs are of a\ngreat importance for aimed design both AAs with optimal magnetic parameters and HSMs with desired sorption\ncharacteristics. In the present paper, amorphous alloy Co30Fe55B15 (an example of the type a-TM1xTM2y Bz ;\nTM - transition metal) was investigated. Hydrogen concentration c H was measured by Sieverts method in\ntemperature interval from T = 150 °C to T = 350 °C under hydrogen pressure p up to 6 MPa. It was found that\nc H was an increasing function of p and its maximum value was typically 0.5 wt.% H2 at 350 °C and 6 MPa.\nHowever, when the alloy was preliminary hydrogen charged (PHC), the pressure dependence of total c Htot in\nthe first absorption cycle(s) is non-monotonous in dependence on PHC conditions. For the sake of comparison,\nthe same absorption characteristics were measured also in Mg2Ni intermetallic that is a common constituent\nin Mg-based HSMs. Comparing Co30Fe55B15 and Mg2Ni, it was concluded that Co30Fe55B15 shows lower\nhydrogen solubility, but much better absorption kinetics.
|
|
San Minn (or) An Artist who prefer creating and paintings than his life
Zeya, Pyin Nyar ; JANEČEK, Vít (advisor) ; VOJTĚCHOVSKÝ, Miloš (referee)
No one can control a painter artist’s freely thoughts and ideas and although his paintings were under the high pressure and banned by force, the artistic value of his materials never go down. So that I am writing this paper.
He, San Minn has broken out the mainstream of Burmese painting field, he never made business paintings as well. He keeps his belief on the art of paints and he is always finding for the new way to make his paintings. His materials are very different from other Burmese painter artists’ materials. His style is unique in Burmese paintings. So I can get a chance to study of his style, ideas, ways of thinking and his determination on the art works.
My paper can show a painter artist’s life who grew up under the military rule for 50 years and the situation and history of Burmese painting field. Then not only people who are studying the painting subject, but also other people can know about the subject of Burmese painting and field of artists. I dare say that my paper must be colorful and fruitful.
As a painter artist, it seems that he wants his audience to feel his materials but he rare to show his real life behind the pictures. For me, I can get a chance to know about his real life for my thesis paper.
xxxxxxxxxx
Thesis Statement
My thesis can be useful for everybody who is interested in Burmese contemporary art field.
This is the biggest chance to read about one of the most famous, important and significant artists and art movements of Burma. His paintings are reflecting his journey through over 40 years of censorship, but he was not afraid to tackle political and social issues.
Many of San Minn's art works are based on autobiographical, making sharp social commentary on the popular culture, social values and scenario circumstances where he has lived in.
xxxxxxxxxx
|
guest ::
