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The effect of lubricant contamination and degradation on lubricating film behavior
Strnad, Jan ; Dzimko, Marián (referee) ; Omasta, Milan (advisor)
Lubrication contamination and degradation is one of the major causes of unexpected failure of tribological nodes. As a result, different levels of maintenance are introduced in practice, leading to a longer service life of the lubricated node. These systems often include sophisticated on-line diagnostic tools that can be used to evaluate a sample of a lubricant using certain variables such as viscosity, number of particles, humidity, dielectric constant, etc. Based on changes of these variables some systems can make corrective measures such as filtering or complete replacement of lubricant. Therefore, the aim of this experimental thesis is to determine the influence of lubrication contamination (solid particles, moisture) and degradation (oxidation) on the lubricating film behavior with respect to its limit bearing capacity. To examine the thickness of the lubricating film, friction and wear, an optical and MTM tribometer, in the ball-on-disc configuration, was used.
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Design of atypical heated bed for 3D printer
Strnad, Jan ; Slaný, Martin (referee) ; Zemčík, Oskar (advisor)
This diploma thesis deals with an atypical heated bed for FDM 3D printer. It presents the most commonly used ways of heating and the chosen variant of the heated beds are realized by powerful resistors. There are also discussed three ways of placement of resistors on the desktop motherboards that are modeled in Autodesk Inventor Professional 2016 and exported to Autodesk Fusion 360, where FEM calculations are made. Optimal alternative is made and tested. The test results are compared with the results of thermal simulations in Autodesk Fusion 360.
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Increasing production effectiveness of wooden mounting part
Strnad, Jan ; Mouralová, Kateřina (referee) ; Zemčík, Oskar (advisor)
This bachelor thesis describes the current production of semi-finished wood in a company TON a.s. These semi products are subsequently designed for assembly, painting, packaging and distribution. Bachelor thesis closer specializes in the production of slotting the mounting rail to the wooden part of the machine Zuckerman, then assembling and gluing to the assembly, which consists of two pieces of wood. These reports serve as sub-assemblies for assembly chair. Identification of deficiencies in the production of cutting grooves in wood parts and their assembly is the main task of work. Based on the knowledge base was developed techno-economic evaluation.
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Engineering principles in the design of plastic products
Strnad, Jan ; Dvořáček, Jiří (referee) ; Svoboda, Petr (advisor)
This Bachelor's thesis deals with an overview study of constructional and technological principles of plastic products. It includes characteristics and basic division of plastics by methods of application and factors affecting their properties. Except that, technological principles or methods of manufacturing and designing plastic products are mentioned. Next part is focused on principles of designing constructional components, such as chimneys, ribbings, stiffeners and many others. Final part is discussion which summarises utilization of plastics, their economic aspect or demand and production of plastics in the world and in Europe.
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Návrh a implementace adaptivního API pro detekci objektů
Strnad, Jan
This thesis deals with the problem of object detection on any device, regardless of its performance. In the development part, an adaptive server that can provide this functionality to connected devices and two Android-based applications were implemented to test the server. The thesis also describes the theoretical articles dealing with the problem at hand, the design of the whole functionality of the server and the applications, the libraries for the development of the different parts, and last but not least, a~description of the implementation and some examples of testing, including the results that were achieved.
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Compressed-air energy storage
Strnad, Jan ; Mauder, Tomáš (referee) ; Klimeš, Lubomír (advisor)
The bachelor thesis is focused on the problematics of compressed air energy storage. It includes a short introduction to the thermodynamics of ideal gases. The suitable geological conditions for the selection of CAES (compressed air energy storage) systems, the advantages and disadvantages of each type, the method of their production, and the process of compressed air accumulation itself were discussed. The thesis presents individual diagrams of compressed air power plants, and special attention is given to the description of the accumulation process. The last section is focused on the description and comparison of two built CAES systems working on an identical concept and also presents information on the unrealized planned CAES systems.
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French counterinsurgency: case study of Mali
Strnad, Jan ; Karásek, Tomáš (advisor) ; Ludvík, Zdeněk (referee)
This thesis is dedicated to French intervention in Mali between the years 2013 and 2022. Insurgency in Mali led to the deployment of French forces in Operation Serval from 2013 to 2014. However, because of the unstable situation was French presence in Mali prolonged, and Operation Serval was succeeded by Operation Barkhane. In this case is tested claim of a group of authors that French counterinsurgency became similar to the US counterinsurgency after their cooperation in Afghanistan. In order to answer the research question Has French counterinsurgency become similar to the US counterinsurgency? by proving/disproving settled hypothesis are conducted qualitative analyses of Operations Serval and Barkhane. The theoretical framework is provided by the concept of Counterinsurgency's Impossible Trilemma by Lorenzo Zambernardi. The results of both analyses and thus the overall result is disproval of the hypothesis because the French nature of counterinsurgency has not changed, however, the writing of current French doctrine was inspired by the US counterinsurgency doctrine.
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Lapse Analysis of Insurance Contracts
Strnad, Jan ; Mertl, Jakub (advisor) ; Mazurová, Lucie (referee)
The aim of the present work is to develop a tool for identification of Motor Third Party Liability insurance contracts which are at risk of cancellation. Methods for explorative data analysis, building a logistic regression model, comparing models and their validation and calibration are presented. Several models are developed on the real dataset using mentioned methods and then the final one is chosen. Behavior of the final model is verified by the validation on the out-of-time sample. Last step is calibration of the model to the expected value of the future portfolio cancellation rate.
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International protection of persons with health disabilities
Strnad, Jan ; Hýbnerová, Stanislava (advisor) ; Faix, Martin (referee)
International protection of persons with disabilities Summary The theme of this thesis is the protection of persons with disabilities under international law. In last decades there have been a dramatic shift in the perception of disability. It has changed from medical approach to the social model of disability, which is closely connected with the human rights perspective on the "disability rights". This paradigm shift has culminated in adoption of the United Nations Convention on the rights of people with disabilities. Violating of their human have several forms and is spreaded all over the world. Nevertheless, the number of them is still growing. According to the WHO estimations about 15 % of world population live with some form of disability and most of them in developing countries in the condictions of the lack of elementary resources and support. Relation between disability, discrimination, poverty nad social exclusion is thus more than clear. On the other hand, people with disabilities definitely do not present any kind of homogeneous group. Diversity of people with disabilities brings a serious challenge in the various forms of obstacles and barriers preventing them from full and equal enjoyment of their human rights and thus a wide range of measures necessary to eliminate them. The aim of this work...
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