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Trust and Reputation in Distributed Systems
Samek, Jan ; Návrat,, Pavol (referee) ; Šafařík,, Jiří (referee) ; Hanáček, Petr (advisor)
This Ph.D. thesis deals with trust modelling for distributed systems especially to multi-context trust modelling for multi-agent distributed systems. There exists many trust and reputation models but most of them do not dealt with the multi-context property of trust or reputation. Therefore, the main focus of this thesis is on analysis of multi-context trust based models and provides main assumptions for new fully multi-contextual trust model on the bases of them. The main part of this thesis is in providing new formal multi-context trust model which are able to build, update and maintain trust value for different aspects (contexts) of the single entity in the multi-agent system. In our proposal, trust value can be built on the bases of direct interactions or on the bases on recommendations and reputation. Moreover we assume that some context of one agent is not fully independent and on the bases of trust about one of them we are able to infer trust to another's. Main contribution of this new model is increasing the efficiency in agent decision making in terms of optimal partner selection for interactions. Proposed model was verified by implementing prototype of multi-agent system when trust was used for agents' decision making and acting.
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Image analysis in tribodiagnostics
Machalík, Stanislav ; Stodola,, Jiří (referee) ; Tillová,, Eva (referee) ; Zemčík, Pavel (advisor)
Image analysis of wear particles is a suitable support tool for detail analysis of engine, gear, hydraulic and industrial oils. It allows to obtain information not only of basic parameters of abrasion particles but also data that would be very difficult to obtain using classical ways of evaluation. Based on the analysis of morphological or image characteristics of particles, the progress of wearing the machine parts out can be followed and, as a result, possible breakdown of the engine can be prevented or the optimum period for changing the oil can be determined. The aim of this paper is to explore the possibilities of using the image analysis combined with the method of analytical ferrography and suggest a tool for automated particle classification. Current methods of wear particle analysis are derived from the evaluation that does not offer an exact idea of processes that take place between the friction surfaces in the engine system. The work is based upon the method of analytical ferrography which allows to evaluate the state of the machine. The benefit of use of classifiers defined in this wirk is the possibility of automated evaluation of analytical ferrography outputs; the use of them eliminates the crucial disadvantage of ferrographical analysis which is its dependence on the subjective evaluation done by the expert who performs the analysis. Classifiers are defined as a result of using the methods of machine learning. Based on an extensive database of particles that was created in the first part of the work, the classifiers were trained as a result, they make the evaluation of ferrographically separated abrasion particles from oils taken from lubricated systems possible. In the next stage, experiments were carried out and optimum classifier settings were determined based on the results of the experiments.
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Extensions to Probabilistic Linear Discriminant Analysis for Speaker Recognition
Plchot, Oldřich ; Fousek, Petr (referee) ; McCree,, Alan (referee) ; Burget, Lukáš (advisor)
Tato práce se zabývá pravděpodobnostními modely pro automatické rozpoznávání řečníka. Podrobně analyzuje zejména pravděpodobnostní lineární diskriminační analýzu (PLDA), která modeluje nízkodimenzionální reprezentace promluv ve formě \acronym{i--vektorů}. Práce navrhuje dvě rozšíření v současnosti požívaného PLDA modelu. Nově navržený PLDA model s plným posteriorním rozložením modeluje neurčitost při generování i--vektorů. Práce také navrhuje nový diskriminativní přístup k trénování systému pro verifikaci řečníka, který je založený na PLDA. Pokud srovnáváme původní PLDA s modelem rozšířeným o modelování neurčitosti i--vektorů, výsledky dosažené s rozšířeným modelem dosahují až 20% relativního zlepšení při testech s krátkými nahrávkami. Pro delší testovací segmenty (více než jedna minuta) je zisk v přesnosti menší, nicméně přesnost nového modelu není nikdy menší než přesnost výchozího systému. Trénovací data jsou ale obvykle dostupná ve formě dostatečně dlouhých segmentů, proto v těchto případech použití nového modelu neposkytuje žádné výhody při trénování. Při trénování může být použit původní PLDA model a jeho rozšířená verze může být využita pro získání skóre v případě, kdy se bude provádět testování na krátkých segmentech řeči. Diskriminativní model je založen na klasifikaci dvojic i--vektorů do dvou tříd představujících oprávněný a neoprávněný soud (target a non-target trial). Funkcionální forma pro získání skóre pro každý pár je odvozena z PLDA a trénování je založeno na logistické regresi, která minimalizuje vzájemnou entropii mezi správným označením všech soudů a pravděpodobnostním označením soudů, které navrhuje systém. Výsledky dosažené s diskriminativně trénovaným klasifikátorem jsou podobné výsledkům generativního PLDA, ale diskriminativní systém prokazuje schopnost produkovat lépe kalibrované skóre. Tato schopnost vede k lepší skutečné přesnosti na neviděné evaluační sadě, což je důležitá vlastnost pro reálné použití.
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Organization and management of production in selected enterprise
DRNOVÁ, Markéta
The topic of my dissertation is "Organization and management of production in selected enterprise". The main goal of this dissertation is mapping of selected enterprise in one year period and obtain sufficient amount of information for future analysis and suggest possible improvements. The identification data, characteristic, products and services and production planning of selected enterprise are provided in introduction of practical part of this dissertation. Analysis of present state with mapping of present state for individually semi-finished products is introduced in the next part of dissertation. For analysis of present state was calculated VA index and for each semi-finished product was created diagram of material movement in next chapter. The goal of analyses and diagram is the finding of narrow spaces in the material flow. The target map of future state was created in the next part. This map is based on present map. The future map presents critical factors that need to be improved. Finally it defines a new VA index, which should be approach to the current state. The penultimate section includes recommendations methods and elements of lean production to the new production hall which the company wants to build. Among the recommended methods are mainly the 5S method, visualization, standardization, SMED and Bottleneck. The last chapter contains a number of measures. For example employee motivation, continuous improvement, personal responsibility, introduction of EDI and ergonomics which would lead to the improvement of the business this enterprise.
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Analysis of Financial Time Series in Crisis
LOPATÁŘ, Antonín
This bachelor thesis is focused on the methods of analysing an additive model of time series. The theoretical part is aimed on history of business cycle, structural and cyclic deflection and individual phases of business cycle. There are described individual theories of business cycle. Crisis as one of the phases is described closer. Further it introduces the methods used in practical part. The practical part contains analysis of individual time series. For example price of gold, LIBOR, PRIBOR, Gross domestic product and other. This time series are analysed by exponential smoothing, moving averages and other methods.
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Role of the nurse in screening for depression in the elderly.
VRZALOVÁ, Monika
The diploma thesis deals with problems of depression in older people. Mainly the work is focused on identifying and analyzing the role of nurses in screening for depression in older people in primary care, acute care, long-term care and home care. This thesis was focused on theoretical direction and was used the method of design and demonstration. In this thesis was set one main goals with five research questions. The main goal was to identify and analyze the role of nurses in screening for depression in the elderly. RQ 1: What is the role of the nurse in screening for depression in the elderly? RQ 2: What is the role of the nurse in the primary care in screening for depression in the elderly? RQ 3: What is the role of the nurse in screening for depression in hospitalized patients in acute care? RQ 4: What is the role of the nurse in screening for depression in seniors in long-term and home care? RQ 5: What rating scales and methods are used in screening for depression in the elderly? The thesis introduce the concept of depression. The following are specified the causes of and the important factors that affect depression in the elderly. It also deals the differences in the clinical symptomatology of depression in old age. It explains possibilities and various barriers in the diagnosis of depression. Another chapter introduces complete geriatric examination, diagnostic classification systems, possible screening methods and scales for detection of depression in the elderly population. It also deals methods of pharmacological and non-pharmacological treatment and its possible complications associated with older age. By reason of increased suicide rate caused by depressive disorder the issue of suicidal behavior in the elderly is introduced. The next chapter deals with the nursing process, which is used by nurses in practice. It consists of the evaluation of the patient's health condition, making nursing diagnosis, creating nursing plan and subsequent implementation and evaluation. The nursing process is also needy for providing quality care. The nursing process in the stage of nursing diagnosis, introduces possible nursing diagnosis for a patient suffering from depression, which are based on the latest classification. Finally is described the role of nurses in screening for depression in the elderly in different health facilities and their contribution to the timely evaluation of depression in the elderly. This chapter introduces the role of nurses, nursing screening and collaboration with a physician. The role of nurses in screening for depression in different medical facilities is based on the first phase of the nursing process of assessment. On the basis of objective and subjective information, the nurse will assess the overall health and mental condition of the patient. Primarily, it was investigated what is the role of the nurse in screening for depression. On the basis of content analysis and synthesis it was necessary to used and processed domestic and foreign literature. A number of relevant sources are the results of various studies and Meta-analyzes, mostly from abroad, but also from the Czech Republic. The thesis can serve as a basis for nurses. The result of this thesis is to create e-learning material available for students in the Faculty of Health and Social Sciences of South Bohemia in Ceske Budejovice in the tutorial called Moodle.
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Impact of environmental factors on the game clashes with motor vehicles on roads in West Bohemia.
Přigrodský, Milan ; Šmíd, Petr (advisor) ; Vykouk, Martin (referee)
Under the influence of long-term development of the motorway and road network and increasing the intensity of traffic in the Czech Republic there are frequent accidents. Among the causes of traffic accidents can include some environmental factors whose action may be involved in their formation and their severity e.g. weather conditions, road surroundings, or time of day, but also combinations thereof.
Other important factors may include environmental character clashes with animals, the weight of individuals of some species may cause a traffic accident. Roads are becoming an obstacle to moving animals, which must be overcome in connection with migration or regular movement in the country. If they are not in their construction or renovation of pre-considered measures that would prevent or restrict the movement or the movement of animals. Measures informing drivers of motor vehicles on the hazard can be fatal clash.
This thesis describes the issue of conflicts of motor vehicles with animals, analysis of events related to this topic on the roads West Region, especially its causes and effectiveness of existing measures and custom design to ensure adequate prevention in areas with the highest incidence of conflicts.
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Web application development with modern technologies
Ibragimov, Ahliddin ; Havránek, Martin (advisor) ; Ladislav, Ladislav (referee)
This thesis covers the development of web applications with modern programming languages and technologies.
The objective of thesis is the research and analysis of modern technologies and subsequent selection of particular programming languages, frameworks and database for development of web application applying those techniques.
Based on analysis of modern trends I chose the following technologies: backend development using popular Spring framework based on Java EE, frontend implementation using one of the most widespread scripting languages JavaScript and its known framework AngularJS developed by Google. For data persistence I chose NoSQL database MongoDB. I provided detailed documentation of each implementation step: project definition, requirements analysis, design, implementation and testing.
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Environmental Impact Assessment Follow up analysis of Pankrác administrative centre
Franclová, Alena ; Keken, Zdeněk (advisor) ; Karel, Karel (referee)
This diploma thesis evaluates issues of environmental impact assessment, focusing on post-project analysis of the Pankrác administrative center. Follow-up evaluation is one of the most important practice through EIA which can fulfil one's potential. Major contribution is mainly the EIA feedback which will be compared between real and predicted impact. Follow-up will provide knowledge to avoid possible non-conformances in EIA evaluation process in the future. Methodical of this thesis is based on international standards of good practice in EIA follow-up, which should always correspond with the specific circumstances of the project and the specific context. The main principles are results-oriented approach, learning, institutional commitment and responsibility. Meaning of the follow-up is the main research question to evaluate the environmental impact assessment. The thesis evaluates the implementation of the main comments from the various point of views. All opinions, changes and views of all participants must be reviewed in implementation and operation phases of the EIA process. Another sub-section provides a comparison of the noise pollution before and after realization of the project and analytical part concludes evaluate compliance with the general principles of good practice. The results collect comprehensive assessment of the EIA process. The follow-up for Pankrác administrative center was important and it proved that positive cooperation with the investor made processes more effective in the terms of the environmental protection of the area. In the future it would be appropriate to dedicate more effort and time for the follow-up. Especially raising awareness of the existence and positive impact of the entire EIA process and also to protect the environmental and public health.
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The renovation of historical parks near the small feudal residences on the example of the study of the renovation of the castle garden in Doudleby nad Orlici in Eastern Bohemia.
Faltysová, Lenka ; Buttry, Ivana (advisor) ; Jakub, Jakub (referee)
The aim of this work is the processing methodology and presentation process how to restore monuments of garden art. On the example of the revitalization of the castle garden immovable cultural monument Castle Doudleby nad Orlicí, based on the study of literature, similar interventions and the analysis and interpretation of various types of archival material the current quality of historic garden was evaluated. It is based on field survey, which consists of dendrological research, analyzing the authenticity of trees and appreciation of all the collected documents, historical sources and professional literature. Concept recovery of castle garden is based on the expert authority´s binding point of view of the state care of historical monuments.
Renaissance castle in Doudleby nad Orlici is located in the eastern part of the town on a slightly raised hill on the right bank of the River Divoká Orlice. There was a wooden medieval fortress with the farmyard on this place in the 13th century. Sr Mikuláš from Bubno started to build a hunting lodge in the Renaissance style as villa in 1588, which was finished in 1590. The significance of Renaissance residence, which complement the early Baroque elements from the late 17th century, is enhanced by the opulent and impressive sgraffito - carpet pattern covering all external and internal frontage, restored in 1886 by Kirchner. The tall chimneys are the part of decoration in the courtyard decorated with sgraffito as well. The chateau complex is formed along its circuit of farm buildings and residential buildings. Building of castle itself is separated by a park with old trees and newer lawns (Hieke, 1984).
Castle park in Doudleby nad Orlicí was founded in 1809 in compositional continuity of the Renaissance castle building. The park forms one organic complex with the castle. The promoter strived, like in the castle rooms, to demonstrate here his wealth, his sense of art and his botanical-dendrological knowledge. The park is designed as a narrow disposition in landscape style and it is composed as a long vista to the castle. The area of the landscape park is 3.76 hectares nowadays.
The literature search is especially dedicated to the Renaissance and its relationship to the garden art. The monument care in the Czech Republic and the activity of professional organization of the monument care of the National Heritage Institute in Josefov is introduced in this section.
The methodological guide describes the used bolsterings and resulting outputs on the basis of them are implemented of such measures, which will help to improve the health and vitality of existing promising trees and new plantings of trees, which are consistent with the original composition with emphasis on the rehabilitation and upgrading of historical value of the object. Treatment of trees and supplementary planting will be done within the frame of total revitalization of the castle park.
The practical unit describes the current status of vegetation monuments of garden art. The inventory trees is the essential tool for analyzing the current status of vegetation monuments of garden art. Inventory, which should provide quality base for a draft recovery, should also be addressed in certain parts with characteristics of individual species (Krejčiřík, 2015).
The results of field investigation were completely recorded in the graphical output.
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