Pump design

V bakalářské práci jsou obsaženy základní informace o rozdělení hydrostatických čerpadel. V prvním bodě práce bude uvedeno nejzákladnější dělení čerpadel a to na čerpadla hydrostatická a hydrodynamická. V čem se liší a hlavní kriteria jejich rozdělení. Podle tohoto dělení jsou pak dále uvedeny základní konstrukční provedení hydrostatických čerpadel. U každého typy čerpadla budou uvedeny jejich výhody a nevýhody, dále pak jejich princip činnosti a použitelnost pro praxi a to vše bude doplněno jednoduchým schématem nebo obrázkem čerpadel. Dále budou popsány jednotlivé charakteristické části jejich konstrukce doplněné jejich rozborem. Na závěr práce budou uvedeny základní početní vztahy pro charakteristické veličiny čerpadel a jejich vzájemná závislost bude popsána diagramy.In this bachelor’s thesis are including basic information about dividing hydrostatic pump. In the first chapter of thesis will be introduced the basic dividing pumps namely on pump hydrostatic and hydrodynamic. Accordance with this dividing will be next introduced basic construction design of hydrostatic pump. With each one type of pump will be introduced their advantages and disadvantages, then also their description of function and their using in practice and all this will be eked with simple scheme or with picture of pumps. Next will be described individual characteristic parts of their construction. In the conclusion will be introduced basic numerical relations for characteristic value of pump and their interdependence will be described with diagrams.

Intelligent Ringtones for Maemo or MeeGo Platform

Tato bakalářská práce se zabývá platformou Maemo a MeeGo. Cílem práce bylo vytvoření aplikace inteligentní změny vyzváněcích profilů. Tato změna probíhá na základě času, senzorů v telefonu jako je akcelerometr, senzor přiblížení, orientace telefonu a okolního osvětlení či na základě lokace. Práce popisuje teorii vývoj a ladění pro jiné platformy za použití metody cross-kompilace. Podrobně rozebírá návrh a implementaci aplikace. Zhodnocuje dosažené výsledky a zmiňuje možná budoucí vylepšení.This bachelor's thesis deals with Maemo and MeeGo platform. The goal of the work was a creation of an application which handles the inteligent profile change. This change is controlled by time, phone sensors like accelerometer, proximity sensor, orientation senzor, ambient light sensor or by location. The work describes how to develop and debbug for different platforms by using cross-compiling. The Design description and implementation follows. Also there is evaluation of the result and discusion about further upgrades.

Influence of Local Geology Changes on Seismic Effect Generated by Railway Traffic

Import 07/02/2011Tato práce se zabývá určením velikosti dynamického zatížení vyvolaného železniční dopravou a snaží se stanovit vliv změny lokální geologie na útlum vibračních projevů od železniční dopravy měřením těchto projevů na geologicky odlišných lokalitách. V druhé části se práce zabývá tvorbou zjednodušených numerických modelů lokalit v programovém systému Plaxis 2D. Modely se pokoušejí simulovat dynamické zatížení od železniční dopravy a ověřují vliv fyzikálních vlastností zeminového prostředí na výsledné hodnoty modelů.This work deals with determination of dynamic loads evoked by railway traffic and tries to determinate local geology changes influence on absorption of vibrations caused by railway traffic. Used are measuring of these vibrations at geologically different localities. The second part of this work deals with simplified numerical models creation of localities by finite element package Plaxis 2D. Models tries to simulate dynamic loads caused by railway traffic and verify physical properties of soil environment influence to final models results.Prezenční224 - Katedra geotechniky a podzemního stavitelstvívýborn

Passive apartment building

Předmětem této diplomové práce je návrh a vypracování projektové dokumentace pro provádění stavby pasivního bytového domu na pozemku par.č.1691/96 v katastrálním území Černovice v obci Brno. Bytový dům bude umístěn ve svažitém terénu. Jedná se o pětipodlažní bytový dům s jedním podzemním podlažím. Dům obsahuje 16 bytových jednotek a je určen pro maximální počet 40 osob. Dva byty jsou řešeny jako bezbariérové. Skeletové schodiště bytového domu se nachází mimo hlavní objekt a s bytovými jednotkami je spojeno pavlačí. Pavlač je vybudována pomocí ocelového skeletu stojícího mimo hlavní objekt. Další volně stojící ocelová konstrukce se nachází na jižní straně objektu a slouží jako balkony bytů. Obvodové zdivo domu je provedeno z vápenopískových tvárnic zateplených izolací z grafitového polystyrenu EPS. Obvodové zdivo suterénu je provedeno z tvárnic ztraceného bednění s betonovou výplní. Stěna je dále zateplena extrudovaným polystyrenem. Stropní konstrukce jsou provedeny z předpjatých železobetonových panelů Spiroll. Nosná střešní konstrukce je provedena z dřevěných příhradových vazníků. Střecha je pultová a střešní plášť je proveden jako vegetační. Objekt je větrán nuceně pomocí vzduchotechnické jednotky. Vytápění a ohřev teplé vody je zajištěn zdroji: kotlem na pelety a fototermickými panely. Bytový dům je navržen s ohledem na energetickou úsporu jako pasivní. Důraz je kladen na celistvou obálku budovy, tvarovou jednoduchost, vzduchotěsnost, orientaci ke světovým stranám a z toho vyplývající nízkou tepelnou ztrátu a vysoké solární zisky budovy.The aim of the thesis is the proposal and the preparation of project documentation for the construction of passive residential building on a plot number 1691/96 cadastral area of Černovice in a Brno city. The residential building will be built in a sloping terrain. It is a five-storey residential building with one floor below ground. The house has 16 residential units and is designed for a maximum of 40 people. Two of the units are designed as a wheelchair accessible. The skeletal staircase of a building is located outside the main building. The residential units are connected by porch. The porch is built from a steel skeleton and is standing outside the main building. At the south side of building is free standing steel construction used as balcony for residential units. Perimeter wall is made of sand-lime blocks which are insulated by graphite expanded polystyrene. Perimeter wall of basement is made of permanent formwork filled with concrete. The wall is also insulated with extruded polystyrene. The ceilings are made of prestressed concrete panels Spiroll. The supporting roof structure is made of wood trusses. The roof is pitched and the roof deck is designed vegetational. The building is ventilated using forced air handling unit. Heating and hot water is provided sources: pellet boiler and photothermic panels. The apartment house is designed with regard to energy saving as passive. Emphasis is placed on a compact building envelope, simplicity of shape, air tightness, low heat loss and high solar gain arising due the building orientation to the cardinal directions.

Diversity patterns and freshwater molluscs similarities in small water reservoirs

The survey presents the molluscan fauna from six impoundment systems of two sides (NW and SE) of the Small Carpathians. Altogether 25 species (15 gastropod and 10 bivalve) species were identified in reservoirs and their subsystems (inflows and outlets). The number of species per site ranged from 2 to 12, the mean number of species per site was 7. The mean number of individuals per site ranged from 15 to 905 (mean 174) ind/m2. Radix auricularia, R. ovata, Gyraulus albus, Gyraulus parvus/laevis, Hippeutis complanatus and Pisidium casertanum were present in more than 50% of reservoirs. The most abundant and frequent species in the entire area and all subsystems were Pisidium casertanum, Pisidium subtruncatum and Gyraulus parvus/laevis. Faunistic similarity indices indicate moderate degree of beta diversity i.e., differentiation among the sites; good separation of sites by cluster analysis indicates a different composition among inflows/outlets and littoral molluscan faunas of reservoirs

Application of rapid prototyping technology in the investment casting technology

Pro urychlení výroby prototypových odlitků, je nezbytné zkrácení času potřebného na výrobu vytavitelného modelu, což umožňuje právě technologie Rapid Prototyping. Tato technologie je vyvíjena již několik desítek let, ale aplikace v metodě na vytavitelný model není zcela běžná. Úkolem bakalářské práce je vypracovat literární rešerši mapující možnosti využití technologií Rapid Prototyping ve slévárenské technologii lití na vytavitelný voskový model.To accelerate the production of prototype castings, it is necessary to shorten the time required for the production of investment casting, allowing just the Rapid Prototyping technology. This technology is being developed for several decades, but the application of the method of lost wax model is completely normal. Task of the thesis is to develop a literature search possibilities of mapping technology in Rapid Prototyping technology foundry investment casting wax model.

Consequences of Employee Mobility

Purpose of the article: The level of unemployment and employee mobility can be considered as one of the persisting economical problems. Current knowledge economy is based on the quality and productivity of labour (employees). Employees and their productivity are thus key factor of success of economy. This study examines causes and consequences of employee mobility and how does it affect economy of state and organisations. Paper describes based on the content analysis and primary research employee mobility and suggests practices how to minimize its negative impact. Methodology/methods: The outputs are listed based upon primary and secondary research. Secondary data sources were processed from Czech statistical office and content analysis of scientific papers which focus on remuneration of employee mobility costs. Primary data has been collected in two successive quantitative surveys by means of questionnaire investigation. The surveys were focus on random sample of employees (who had already left their jobs). Scientific aim: The aim of the paper is to reveal costs and consequences of employee mobility and to suggest recommendations to keep employees in organisations in order to minimize loses, costs and production losings. Findings: The results show calculation of employee mobility costs. Costs per unemployed employee are listed. The outputs reflect whether it is just loss of production (employee just exchange job positions) or additional loss of state caused by receiving unemployment support, lowering of VAT and other related items. The revealed outputs allow us to assume that employee mobility is quite expensive phenomenon, not just because of employee turnover cost, but also because of high loss of production in organisations and also in state economy. All results are counted per employee per year. Finally, recommendations to lower employee mobility and its costs and losses are listed. Suggestions are based on the results of surveys of employees, who listed their reasons to leave job positions. Conclusions: The outcomes provide a specification and consequences of employees’ mobility. Further monitoring of causes and consequences of employee mobility together with greater emphasis into all related practices is necessary to obtain results for future prognosis

MATERIALS AND TECHNOLOGIES FOR THE CONSOLIDATION OF HISTORIC PLASTERS BY THE WETTING AND SURFACE PENETRATION METHOD

The term of a historic plaster or surface coating, respectively, denotes a layer or a multilayer of materials firmly bonded to the substrate, whose structural and technical condition significantly affects not only the aesthetic effect, but mainly the service life of this surfacing. Due to the permanent exposure of plaster surfaces to the external environment (in the exterior as well as the interior), they belong to the group of the most exposed parts of historic and heritage buildings, often exhibiting a high degree of degradation and disintegration. The consolidation and rehabilitation of plasters with, among other things, a degraded binder component, damaged structure and insufficient adhesion of individual layers to each other and to the masonry substrate is a challenging task in the restoration of historic buildings. The paper presents the alternative of strengthening degraded surface layers by means of nanomaterials based on calcium hydroxide applied by the surface penetration method

EXPERIMENTAL RESEARCH INTO THE RESPONSE OF HISTORICAL STRUCTURE TO THE EFFECTS OF NATURAL SEISMICITY

The article presents the evaluation a building technical survey of a damaged historic rectory building in Luby near Cheb, it analyses the damage and proposes conceptual ideas for the rehabilitation design of a historic building damaged by the effects of natural seismicity applying the results and outputs of the NAKI II research project