National Repository of Grey Literature 21,462 records found  beginprevious21453 - 21462  jump to record: Search took 0.53 seconds. 

Spectral optical simulator
Kavalír, Zdeněk ; Pop, Tomáš (referee) ; Pelikán, Josef (advisor)
The aim of this thesis is to design and implement an optical simulator focused on spectral light sources and dispersion effects, suitable for educational and experimental purposes. The input of the simulation is an XML scene definition file describing light sources, optical elements and optical sheets. The result of the simulation is one or more pictures containing incident light footprints collected on optical sheets as well as side sheets observing scene from a distance along with track of light passing through the scene. A light source can be defined as a point light with user-defined spectral distribution or a bitmap light using input bitmap picture as a glowing texture. The shape of any optical element can be defined as a basic solid, or constructed using CSG techniques. The scene definition file specification allows using of arithmetic expressions and user-defined variables. The simulation is based on a distribution of light from light sources toward the scene using a Monte-Carlo algorithm. Behaviour of light incident onto a transparent boundary is computed precisely according to the geometry of an element; a paraxial ray approximation is not used.

Current sensor with digitized output signal
Hanuš, Ivan ; Vágner, Martin (referee) ; Havránek, Zdeněk (advisor)
The objective of this thesis is to describe principles of measuring of alternating current in low voltage power supply network with Rogowski coil and to study details of requirements for electronic current sensor with digital output. Furthermore to study the current solution of digitalization of output signal from Rogowski coil and to determine metrological characteristics of the digitalization module for processing the signal from the Rogowski coil as current sensor and to design a concept of an electronic current sensor unit with Rogowski coil and the digitalization module with the expected optical output. The theoretical part deals with the measurement of current using Rogowski coil, its characteristics and advantages compared to conventional current transformers. Further in the thesis there are specified the requirements for current sensor. The practical part deals with the design of digitalization module consisting of a pair of AD converters, a microcontroller and output circuits. Furthermore, the thesis deals with digital signal processing of signal from Rogowski coil. Furthermore, the thesis describes firmware for microcontroller and PC application. The result of thesis is functional circuit of electronic current sensor that processes signal from Rogowski coil and converts it to digital form.

Tourist navigation for mobile devices on J2ME/CLDC platform
Dobroucký, Martin ; Obdržálek, David (referee) ; Zajíček, Ondřej (advisor)
Subject of the thesis is design and implementation of application, which will be used as tourist navigation. Application will run on mobile devices with GPS module. Main features are: tracking of device position on a map, track recording, navigation along predefined route, support for various on-line map sources. Attention will be paid to usability in trekking and cycling activities.

Ways to address selected areas of cooperative organization and its application in Cluster Omnipack
Lukavec, Petr ; Klas, Jan (advisor) ; Molnár, Zdeněk (referee)
This work is based on knowledge of concept of clusters and of other cooperative organizations. The general objective of this work is to solve specific, narrowly defined problems of a particular cluster. The reason was to come up with a solution that will be applicable and useful in this particular cluster. And this solution may be useful also in other clusters, because clusters throughout Europe, have many common features. Problems were generated by the author, during talks with representatives of cluster Omnipack. So these problems are important and really relevant for this cluster. Next goal was to measure these issues in relation to basic criteria, like importance, and difficulty. This evaluation was the basis for selecting problems to solve. Other objective was to search for specific solutions using existing literature, examples from other clusters and output of own research of clusters. As main problem to solve was chosen problem called "performance measurement". Because no suitable solution was found in the literature or other resources, author had to create own solution. Problematic area of the problem "performance assessment" was described as follows: "Support from European Union subsidies is really crucial for many clusters in Czech Republic right now. But after the end of these subsidies, clusters will have to prove or demonstrate to its members that they are still useful. Then cluster members will be then willing to continue with financial supporting of their cluster." The problem was solved from the perspective of cluster members, and main areas of its concept are performance evaluation of cluster members from the perspective of a cluster member, benefits of the cluster as a whole for members of the cluster, the benefits of other members of the cluster for a particular member of the cluster and cluster management role for the use of these advantages from the perspective of cluster members. Solution of this problem is very detailed and extensive, and represents main author's scientific contribution. Important point of this approach is evaluating the performance of the cluster from the perspective of cluster members. This approach brings some new insights. Author proposed his own concept of looking at the actors and factors, influencing the performance of cluster members. Proposed concept of pairwise comparison of cluster members is also really innovative. It brings new opportunities in the detailed description and understanding the cluster by its members and management.

Cycling in the Central Bohemia Region
Jandová, Michaela ; Zelený, Lubomír (advisor) ; Černý, Jiří (referee)
The aim of this thesis Cycling in the Central Bohemia Region is to analyse the state of cycling in selected microregion, to analyse preconditions for further development of cycling and to assess the state of cyclepaths in the microregion. The emphasis is put on the development of cycling as an equivalent means of transport. The other aim is to identify the key problems of cycling and to propose own solutions, which would lead to elimination of problems, which have been found. This thesis also includes a detailed analysis of parking cycling infrastructure and proposals for adequate measures for its improvement.

HR processes
Riessnerová, Martina ; Šikýř, Martin (advisor) ; Kolouchová, Linda (referee)
Main object of diploma thesis is to analyze HR processes in international company, finding weak and strong parts of this process and come up with new ideas to improve this process.

Speed Increasing of the Skalice nad Svitavou - Velké Opatovice Section
Grenar, Filip ; Kroupa, Jan (referee) ; Hruzíková, Miroslava (advisor)
The objective of this bachelor thesis is to suggest the speed increasing on the Skalice nad Svitavou - Velké Opatovice railway track. Speed increasing is assessed with the actual track geometrical parameters, as well as to the adjusted track geometrical parameters, which do not imply the need of major modifications to the track. Speed limitations in relation to railway crossings, signals etc. are taken into account.

Using metaheuristics for the transportation problem
Keshi, Silvia ; Pelikán, Jan (advisor) ; Fábry, Jan (referee)
Cílem práce je aplikace ACO optimalizačních technik na úlohu obchodního cestujícího a dopravní úlohu. V teoretické části práce je provedena literární rešerše dané problematiky. Dopravní úloha je pojednávána z různých pohledů, jednak z pohledu teorie grafů a také z pohledu teorie složitosti. Dále jsou popsány hlavní typy dopravních úloh včetně metod jejich řešení. Hlavní část práce je věnována metodám hejnové inteligence ve vztahu k dopravní úloze. Metody hejnové inteligence jsou zde zevrubně popsány včetně jejich biologického pozadí. Hlavní pozornost je věnována metodám optimalizace pomocí kolonií mravenců (ACO). Jsou uvedeny hlavní používané algoritmy ACO optimalizace, a metody jak postupovat, chceme li takový algoritmus navrhnout. Praktická část práce je věnována studiu jednoho z původních ACO algoritmů ? Ant System algoritmu.Byl studován vliv parametrů ? a ? které představují relativní význam feromonové stopy a heuristické informace (vzdálenosti). Byly zkoumány možnosti studia ACO optimalizace navržené v programu Matlab na jednoprocesorovém počítači, tyto se ukázaly jako omezené, charakter úlohy vyžaduje paralelní prostředí. Přínosem práce je zjištění, že na rozdíl od výše citované práce použitá implementace algoritmu dává dobré výsledky v širokém rozmezí parametrů ? a ?. Dále byly potvrzeny některé vlastnosti ACO optimalizace uváděné v literatuře, jako je postupné zhoršování průměrného výkonu mravenců po určité době běhu. Dalším zajímavým poznatkem bylo zjištění že zcela nepatrná změna ve způsobu generování náhodného prvku v rozhodovacím mechanismu má vliv na celkový průběh optimalizace.

POUŽITÍ METAHEURISTIK K ŘEŠENÍ DOPRAVNÍCH ÚLOH
Kadelová, Silvia ; Pelikán, Jan (advisor) ; Fábry, Jan (referee)
Cílem práce je aplikace ACO optimalizačních technik na úlohu obchodního cestujícího a dopravní úlohu. V teoretické části práce je provedena literární rešerše dané problematiky. Dopravní úloha je pojednávána z různých pohledů, jednak z pohledu teorie grafů a také z pohledu teorie složitosti. Dále jsou popsány hlavní typy dopravních úloh včetně metod jejich řešení. Hlavní část práce je věnována metodám hejnové inteligence ve vztahu k dopravní úloze. Metody hejnové inteligence jsou zde zevrubně popsány včetně jejich biologického pozadí. Hlavní pozornost je věnována metodám optimalizace pomocí kolonií mravenců (ACO). Jsou uvedeny hlavní používané algoritmy ACO optimalizace, a metody jak postupovat, chceme li takový algoritmus navrhnout. Praktická část práce je věnována studiu jednoho z původních ACO algoritmů ? Ant System algoritmu.Byl studován vliv parametrů ? a ? které představují relativní význam feromonové stopy a heuristické informace (vzdálenosti). Byly zkoumány možnosti studia ACO optimalizace navržené v programu Matlab na jednoprocesorovém počítači, tyto se ukázaly jako omezené, charakter úlohy vyžaduje paralelní prostředí. Přínosem práce je zjištění, že na rozdíl od výše citované práce použitá implementace algoritmu dává dobré výsledky v širokém rozmezí parametrů ? a ?. Dále byly potvrzeny některé vlastnosti ACO optimalizace uváděné v literatuře, jako je postupné zhoršování průměrného výkonu mravenců po určité době běhu. Dalším zajímavým poznatkem bylo zjištění že zcela nepatrná změna ve způsobu generování náhodného prvku v rozhodovacím mechanismu má vliv na celkový průběh optimalizace.

Image, photography as a concept in elementary school education
Macháčková, Zuzana ; Šamšula, Pavel (advisor) ; Novotná, Magdalena (referee)
Annotation: Macháčková, Z.: Image, photography as a concept in elementary school education [Diploma thesis] Brno 2012 - Charles University in Prague, Faculty of education, Department of Art, 114 p. Objectives: Based on both recommended and other literature, discuss the evolution of photography (analogue and digital photography, photographic types and genres) and hint at the specifics of photographic production in comparison with classical art media. Discuss the expressive possibilities of manipulated photography (PC photography editing, collage, photomontage, etc.), with attention to applicability of photography in elementary school education. Consider organic inter-discplinary relations between the art class and other classes. Design a didactic project for an art class, based on the Framework Education Programme for Basic Education. The project should employ digital photography as a specific and accessible art medium and should be practically validated. It should focus on experiments and etudes, in which students would use photography as an accessible tool to experience and create art. Results: The proposed project, based on digital photography as a device for art activities, has shown that photography can be practically and successfully applied in elementary school classwork. Keywords: Elementary...