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A computational study on the effects of active flow control to the evolution of the wingtip vortices of a three dimensional wing
Skarolek, Vilém ; Hradil, Jiří (referee) ; Karampelas, Stavros (advisor)
V této diplomové práci byla provedena série numerických výpočtů proudění kolem křídla s aktivním řízením proudu. Výpočty jsou provedeny pro různé úhly náběhu křídla s profilem NACA 0015. Křídlo s zařízením pro aktivní řízení proudu bylo testováno v podmínkách s Machovým číslem M=0,21 a Re= 2500000. Bylo zkoušeno více možných konfigurací s cílem nalézt nejúčinější variantu, která bude zároveň stále energeticky efektivní. Vybraný přístup k aplikaci aktivního řízení na křídle se od ostatních liší. Použito je velkých ploch pro vyfukování vzduchu o nízké rychlosti a zároveň v souvislosti s tím je studována energetická účinnost. Snížení odporu a zvýšení vztlaku je dosaženo změnou řídících veličin. Při určitých specifických podmínkách je zařízení schopno při velmi vysoké energetické účinnosti dosáhnout pro všechny úhly náběhu výrazného snížení odporu, zvýšení vztlaku křídla, nebo obojího zároveň. Maximální pokles odporu křídla na malých úhlech náběhu přesahuje 40% z celkového odporu křídla a stále s dodržením energetické účinnosti.
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Wire position measurement
Hradil, Jiří ; Klusáček, Stanislav (referee) ; Beneš, Petr (advisor)
In my bachelor’s thesis, I consider with inductive sensors. In shortness is described principle of sensor functionality, its advantages and disadvantages. I gather usage of sensors in real use. Work summarises producers and importers sensors on Czech market. In practical part of this work, I took measurements with 12 inductivity sensors. And then I evaluated measurement. In second part of practical measurement I made measurement using semi-controlled apparatus control from labview. There I research impact of changing of wire in the characteristics of the sensor, I found out the impact of hysteresis and the voltage changes on the shape of characteristics.
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Liquid flow measurement
Hradil, Jiří ; Fialka, Jiří (referee) ; Beneš, Petr (advisor)
In my master’s thesis, I consider with flow measurement. In shortness is described principle of flow sensors functionality, its advantages and disadvantages. I designed and made device for practice measurement of flow. On this device are installed three flowmeters The characteristic of this flowmeters were measured and evaluated. I made program in LabVIEW to collect and analyze information from instaled flowmeters.
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Creating templates for common content management systems
Povolný, Jan ; Vojíř, Stanislav (advisor) ; Hradil, Jiří (referee)
This thesis is covering the creation of templates for leading open source CMS systems. For the purposes of thesis, three current most popular open source content management systems were selected - WordPress, Joomla! and Drupal. The main aim of this thesis, and also the main outcome, is to develop a fully responsive templates for each of these systems, which would meet predetermined requirements. Three systems above are compared in terms of creating templates based on the criteria set out. Based on this comparison there is one system selected, which represents the most suitable platform for emerging website covering the topic of smart watches and wearables in general.
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Development of an application of system Helpdesk
Spišák, František ; Hradil, Jiří (advisor) ; Pavlíček, Luboš (referee)
Bachelor thesis deals with development of the Internet application Helpdesk for customer support. The aim of this thesis is to develop the application with system of automatic answers, which based on customer requirements, selects the best answers. The user of the application will be able to set multiple answers, from which the system will collect. If it happens that selected answer is not accurate, the user will be able to edit it and Helpdesk will improve selection of future answers based on machine learning. Customer requirements will be imported to the helpdesk via social network Facebook. The theoretical part focuses on analyse of selected existing helpdesk solutions where their properties are compared. Practical part consists of own solution of helpdesk system including used technologies. In the conclusion, we evaluate the goals of the thesis and benefits the system brings.
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CSS and options of print output
Dařílková, Jana ; Kosek, Jiří (advisor) ; Hradil, Jiří (referee)
The bachelor thesis deals with the possibility of using CSS (Cascading Style Sheets) for printing XML documents. The first part of the thesis describes the basics of XML language, DocBook scheme, the issue of stylistic languages including illustrative explanations of how the languages work, it also includes the presentation of possible ways how CSS can be used for printing. Then it defines features of paged media and focuses on using Cascading Style Sheets for printing paged media with the CSS Paged Media module. Last but not least, the thesis discusses CSS preprocessors and their potential contribution to this work and it devotes a careful focus on the selection of tools for the practical realization of the objective of the thesis. The second part of the thesis deals with the practical use of the CSS Paged Media module for printing and it aims to create an easily editable CSS style sheet for formatting different documents written in DocBook. For meeting these requirements it also uses the CSS preprocessor LESS. The whole practical part is also presented and accomplished on the creation of this bachelor thesis. The third and final part of the thesis identifies the areas where CSS or other used tools struggle with providing sufficient support for creating quality printed output.
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Application for understanding the work with frameworks AngularJS and KnockoutJS
Doškář, Josef ; Vojíř, Stanislav (advisor) ; Hradil, Jiří (referee)
Many modern applications are nowadays implemented in JavaScript using frameworks, due to flexible and efficient development. This trend has led to emergence of many JavaScript frameworks so it is often hard to choose which one to use. This bachelor thesis aims to compare, describe and evaluate two JavaScript frameworks: AngularJS and KnockoutJS. It will mainly concentrate on possibilities and differences of these frameworks in programming web applications and on explanation how to work in these frameworks. Text includes detailed description of frameworks, which immediately prepares the reader to start working with one or both frameworks. Thesis also includes web application that demonstrates the implementation of the examples with detailed descriptions, code samples and explanations how to implement and use these examples. After reading this bachelor thesis, the reader will be able to decide, which one of these frameworks are better suited for his work and can also use the web application to draw inspiration in his own application.
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Tool creation for an automated penetration testing of web applications
Kiezler, Tomáš ; Hradil, Jiří (advisor) ; Pavlíček, Luboš (referee)
This thesis focuses on security of web applications, which can be measured by the results of penetration testing. In the theoretical section of this study individual methods of how the testing can be performed are outlined. This study then outlines the advantages and disadvantages of automated testing compared to manual testing, and the tools which incorporate automated scanning for security of web applications are scrutinized. Statistics of security risk occurrences found on the Czech Internet are also included. The practical part depicts the creation of a tool for automated testing, written in the most frequently used programming language in web development, that will be able to detect the most common weaknesses. The tool is developed to show ways of detecting certain risks and to inspect whether it is possible to automate the search. The primary aim of this study is to introduce the reader to the field of security of web applications, present to them the legality of penetration testing and introduce them to options of finding and fixing security risks and avoiding them in web development.
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