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Location of node real position on the Internet
Kopeček, Tomáš ; Müller, Jakub (referee) ; Komosný, Dan (advisor)
In this thesis I focus on finding the position of computers on the Internet. This need for locating computers originated in the last several years through the creation of overlay networks. For this activity there are many algorithms. This paper describes the King method that estimated the distance between communicating stations by using the domain name system. The aim of this work is to verify the accuracy of the King method in experimental PlanetLab network. This network provides access for more than 1000 stations worldwide.
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Distance measurement between nodes in IP networks
Šimák, Jan ; Novotný, Vít (referee) ; Komosný, Dan (advisor)
This thesis deals with delay prediction issue between nodes on the Internet. Accurate delay prediction helps with choosing of the nearest internet neighbor and contributes to effective usage of network sources. Unnecessary network load is decreased due to algorithms of delay prediction (no need for many latency measuring). The thesis focuses theoretically on the three main algorithms using coordinate systems - GNP, Vivaldi, Lighthouses. Last one is at the same time the main subject of the thesis too. Algorithm Lighthouses is explored in detail theoretically and in practise too. In order to verify the accurate of delay prediction of Lighthouses algorithm the simulation application was developed. The application is able to compute node coordinates of synthetic network using Lighthouses algorithm. Description of simulation application and evaluation of simalution results are part of practice part of this thesis.
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Hough Transform for Line Detection
Leikep, Bořek ; Beran, Vítězslav (referee) ; Španěl, Michal (advisor)
This paper is describing use of the Hough Transform for line detection. It also contains theoretical description of circle detection and detection of more complex subjects. The goal of this work is to evaluate implementation of line detection in C# on Microsoft .NET platform mostly from a time consumption point of view. The paper contains description of implementation of the application Detektor which is part of this work.
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Tensors and their geometrical and mechanical applications
Kunz, Daniel ; Kureš, Miroslav (referee) ; Tomáš, Jiří (advisor)
In this thesis I describe construction of tensor algebra and its following usage of this magnificent structure for description of curved surfaces. This structure can be used in geometry or for example in mechanic. The thesis is focused on clear construction and if it is possible than to sustain visual aspect of current problem. Main task of this thesis was got the feel of tensor algebra and its construction and then use it on tasks in physic and mechanic.
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Integral Transformations Using Vector Operators
Joch, Lukáš ; Štarha, Pavel (referee) ; Hoderová, Jana (advisor)
This Bachelor`s thesis is devoled to the vector operotrs. The operators plays the big role in the mathematical notation of different physical processes. The main aim od this paper is to show various vector operators and their properties. At the end are the integral theorems presented, concretely Gauss-Ostrogradsky theorem, Green`s theorem and Stokes`s theorem.
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Systémy měření rozměrů a tolerancí v technické praxi
Hlaváček, Martin
The presented bachelor thesis researches the area of length measurement in engineering practice. It describes the possibilities of measuring length dimensions in practice using modern measuring systems. First, basic concepts in engineering metrology, measuring procedures and an introduction to basic length measuring instruments are defined. This is followed by an introduction to more advanced, more accurate measurement systems, namely measurement using pneumatic, electronic and optoelectronic gauges. The work mainly focuses on measurement using coordinate measuring machines in engineering practice. It also deals with the measurement of surface profile, especially the mean arithmetic roughness Ra. The thesis concludes with a discussion of modern measuring methods and outlines the shift in the use of coordinate measuring machines in engineering practice and anticipated future developments.
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Properties of near-horizon geometry of spacetimes
Daněk, Jiří ; Žofka, Martin (advisor) ; Svítek, Otakar (referee)
Nowadays, the near-horizon regions of black holes have enjoyed great attention thanks to their role in the popular AdS/CFT correspondence and their specific geometry suitable for formulations of uniqueness theorems in higher dimensions. A strictly general-relativistic point of view reveals also many interesting phenomena taking place near black-hole horizons. Our aim was to investigate how horizon multiplicity affects near-horizon geometry, geodesical distance, radial motion of photons and massive, charged particles, and also the possibility of collision processes leading to unbound collision energies near the horizon. We chose the Reissner-Nordström-de Sitter metric, which, on the one hand, is simple thanks to being static and spherically symmetric but which, on the other hand, is rich enough to enable the existence of up to a doubly degenerate ultra-extreme horizon. After discussing the physical feasibility of the near-horizon limit, we applied it to single, double, and triple horizons, their near-horizon geometries, and local collision processes. We found continuous coordinate systems covering all types of horizons and analytic solutions for motion of radial photons and special or critical, massive, charged particles in their vicinity. We addressed particle collisions in the immediate vicinity of horizons...
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Understanding of the notion of a coordinate system by secondary school students
Klápa, Petr ; Janda, David (advisor) ; Zamboj, Michal (referee)
The aim of a thesis High school students' understanding of the coordinate system concept is to research the level of student's understanding of the topic by using analysis and a description of student's problems with given topic. A written non-standard test with exercises from non- Cartesian coordinate system is used as a tool to analyse the level of students' understanding. The first part of the thesis describes the historical development of the topic with emphasize on the renaissance era, in which were the basics of the modern concept of coordinate system set. The first part also includes the description of educational requirements from course books, curricular documents and the theory of concept image and concept definition, which focuses on understanding of mathematical terms. Second part of the study concentrates on the experiment with a non-standard test given to students at mathematical lessons at high school. The results are presented and analysed by previously specified phenomena and interpreted in the concept image and concept definition theory. Results of the practical part show a great variety of students' level of understanding the examined concept in theoretical and also in practical level. Results of students with good theoretical knowledge but low success in practical part are...
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