New materials in welding technology

Bakalářská práce zpracovaná v rámci studia oboru B2339 se zabývá svařitelností nových typů ocelí, zejména ocelí vysokopevnostních. Jde o literární studii zahrnující problémy svařitelnosti, tj. na vliv tepelně deformačního cyklu na tvorbu defektů ve svarovém spoji.The bechelor work elaborated in frame of studies branch B2339 deals with weldability of new kinds of steel especially about high-strength steel. This is a literary pursuit that includes problems with weldability, that means standing heat deformation cycle on defect activity in welding connection.

Measurement module with simultaneous-sampling A/D converter

V práci je navržen modul pro sběr analogových akustických signálů ze snímačů. K digitalizaci těchto signálu je použit přesný A/D převodník ADS1287 od firmy Texas Instruments s rozlišením 24 bitů. K ovládání tohoto A/D převodníku a posílání digitalizovaných dat do PC je využito 32-bitového mikrokontroleru AT91SAM7S64 firmy ATMEL, který má implementováno USB rozhraní. Pomocí vývojových modulů s mikrokontrolerem a A/D převodníkem je vytvořen program pro mikrokontroler ve vývojovém prostředí IAR Embedded Workbench IDE 5.0 a jednoduchá aplikace pro PC v prostředí Borland C++ Builder. Oba programy jsou v jazyce C++. Rychlost vzorkování je 26 kHz. Na základě poznatků je realizován modul USB-ADC s mikrokontrolerem a A/D převodníkem.In this work is designed programme unit for acquisition analog acoustic signlas from sensors. There is used accurate A/D converter ADS1287 by the company Texas Iinstrument with resolution of 24 bits to digitizing these signals. There is used 32-bit microprocessor AT91SAM7S64 by the company Atmel to control this A/D converter and sending digitized data to PC. This microprocessor has implemented USB interface. By force of developmental programme units whit microprocessor and A/D converter is produced programme for microprocessor in developmental setting IAR Embedded Workbench IDE 5.0 and simple aplication for PC in setting Borland C++ Builder. Both of those programs are in language C++. Rate of sampling is 26 kHz. On the basis is realized programme unit USB-ADC whit microprocessor and A/D converter.

Roman spa and sauna world

Diplomová práce byla zpracována jako architektonická studie. V před-diplomním semináři byla vypracována studie na urbanistický koncept území a budovu Aquaparku v Brně – Židenicích ve svahu kopce Hády. Diplomová práce se zabývá rozšířením komplexu o římské lázně a saunový svět. Jedná se o dvoupodlažní nepodsklepenou stavbu kubického tvaru. Návrh klade důraz na funkčnost provozu, řešení interiéru a celkový výraz stavbyThis thesis was prepared as an architectural study. In front of his graduate-seminar was a study on urban concept and the building Aquapark Brno - Zidenice hillside snakes. This thesis deals with the extension of the complex of Roman baths and sauna world. This is a two-storey building without a basement cubic shape. The proposal emphasizes the functionality of the service, interior design of the building and the overall expression

Automated Installation and Configuration of Operating System GNU/Linux, Distribution Gentoo

Úkolem této práce je navrhnout a implementovat nástroj, který uloží souhrnnou konfiguraci již instalovaného Gentoo Linux systému a nástroj, který automaticky provede novou instalaci systému se stejnými balíčky a stejnou konfigurací na stejné či jiné hardwarové konfiguraci.This bachelor's thesis deals with designing and implementation of a tool which stores a configuration of installed Gentoo Linux system and a tool that performs automated installation of a new system of the same configuration and with the same packages on both the same and a different hardware configuration.

There are only two nonobtuse binary triangulations of the unit nn-cube

Triangulations of the cube into a minimal number of simplices without additional vertices have been studied by several authors over the past decades. For $3\leq n\leq 7$ this so-called simplexity of the unit cube $I^n$ is now known to be $5,16,67,308,1493$, respectively. In this paper, we study triangulations of $I^n$ with simplices that only have nonobtuse dihedral angles. A trivial example is the standard triangulation into $n!$ simplices. In this paper we show that, surprisingly, for each $n\geq 3$ there is essentially only one other nonobtuse triangulation of $I^n$, and give its explicit construction. The number of nonobtuse simplices in this triangulation is equal to the smallest integer larger than $n!({\rm e}-2)$.Comment: 17 pages, 7 figure

Swarming of Unmanned Aerial Vehicles Using Indirect Information Exchange by Observation of the Workspace

Tato práce se soustředí na návrh, implementaci a ověření řídícího systému a systému pro relativní lokalizaci roje bezpilotních autonomních helikoptér v lesním prostředí. Základem lokalizačního systému je ICP algoritmus. Rojový řídící systém je inspirován Boidy a modifikován pro lepší interakci s reálným prostředím. Implementace byla ověřena v realistickém simulátoru Gazebo a pomocí Matlabu. Přístup, který je uveden v této práci, byl následně porovnán se současným systémem pro relativní lokalizaci a navigaci v lese, které používá skupina Multirobotických systémů na ČVUT v Praze.This thesis focuses on the design, implementation, and verification of a control system and relative localization approach for a swarm consisting of unmanned aerial vehicles in a forest environment. The core of the localization system is the ICP algorithm. The control system is based on Boids with modifications to adapt to the forest environment better. Implementation was verified in the realistic Gazebo simulator as well as in Matlab. The approach introduced in this thesis was also compared with the existing system for relative localization and navigation used in the Multi-Robot Systems group at Czech Technical University in Prague

Nonobtuse local tetrahedral refinements towards a polygonal face/interface

In this note we show how to generate and conformally refine nonobtuse tetrahedral meshes locally in the neighbourhood of a polygonal face or a polygonal interior interface of a three-dimensional domain. The technique proposed can be used for example for problems with boundary and/or interior layers, and for interface problems

On simplicial red refinement in three and higher dimensions

summary:We show that in dimensions higher than two, the popular "red refinement" technique, commonly used for simplicial mesh refinements and adaptivity in the finite element analysis and practice, never yields subsimplices which are all acute even for an acute father element as opposed to the two-dimensional case. In the three-dimensional case we prove that there exists only one tetrahedron that can be partitioned by red refinement into eight congruent subtetrahedra that are all similar to the original one

A note on factorization of the Fermat numbers and their factors of the form 3h2\sp n+1

summary:We show that any factorization of any composite Fermat number $F_m={2^{2}}^m+1$ into two nontrivial factors can be expressed in the form $F_m=(k2^n+1)(\ell2^n+1)$ for some odd $k$ and $\ell, k\geq 3, \ell \geq 3$, and integer $n\geq m+2, 3n<2^m$. We prove that the greatest common divisor of $k$ and $\ell$ is 1, $k+\ell\equiv 0\ mod 2^n,\ max(k,\ell)\geq F_{m-2}$, and either $3|k$ or $3|\ell$, i.e., $3h2^{m+2}+1|F_m$ for an integer $h\geq 1$. Factorizations of $F_m$ into more than two factors are investigated as well. In particular, we prove that if $F_m=(k2^n+1)^2(\ell2^j+1)$ then $j=n+1,3|\ell$ and $5|\ell$