Analysis of properties of openings with respect to infiltration in buildings

Disertační práce je primárně zaměřena na analýzu vlastností výplní otvorových konstrukcí vzhledem k infiltraci ve stavbách, konkrétně vztaženo k průvzdušnosti otvorových výplní a průvzdušnosti staveb. Hlavním cílem práce je zjistit, jak může být ovlivněna celková průvzdušnost stavby v návaznosti na použité otvorové výplně a jejich vlastnosti, týkající se konkrétně průvzdušnosti při stanoveném stupni dotažení použitého celoobvodového kování. V návaznosti na celkovou průvzdušnost stavby bude proveden výpočet energetické bilance konkrétní stavby v součinnosti na zjištěné výsledky průvzdušnosti stavby při definovaném stupni dotažení celoobvodového kování v úrovních 0%, 50% a 100%. Zjištěné výsledky zkoušek a měření budou promítnuty do konkrétního výpočtu energetické bilance posuzované stavby formou numerické simulace.The dissertation thesis is primarily focused on the analysis of the properties of openings constructions with respect to infiltration in constructions, specifically related to the permeability of opening fillings and the permeability of buildings. The main aim of this work is to find out how the overall air permeability of a building can be influenced in relation to the openings and their properties, which are related specifically to the air permeability at the specified tightening degree of the used all-round fitting. In relation to the overall air permeability of the building, the energy balance of a particular building will be calculated in cooperation with the determined results of the air permeability of the building at a defined degree of tightening of used all-round fitting at levels 0%, 50% and 100%. The results of tests and measurements will be reflected in a concrete calculation of the energy balance of the assessed building in the form of numerical simulation.

Environmental Effects among Differently Located and Fertile Sites on Forest Basal-Area Increment in Temperate Zone

Environmental properties differently influence the growth of forest tree species. The antagonistic effects of variable environmental properties classify the forest response according to various tree compositions among different sites. The division of the forest response was assessed in 52 stands arranged into 26 types of 13 site management populations (MPs) in 5 areas in the Czech Republic territory. The assessment was performed using time-series multiple regressions of basal-area increment from pure immature stands of Norway spruce (Picea abies), Scots pine (Pinus sylvestris), oaks (Quercus sp.), ash (Fraxinus excelsior) and willows (Salix sp.) dependent on the interpolated average temperatures, annual precipitation, atmospheric concentrations of SO2, NOx and O3 and soil properties over the period 1971-2008 at p < 0.05. Site MPs differentiated the forest response to a greater extent than tree species. The response of the forests was significantly distributed by means of the montane, upland and waterlogged sites. The multiple determination index (r2) GREATER-THAN OR EQUAL TO 0.6 indicated an adaptable tree increment but an interval of r2 between 0.80-0.92 implied forest sensitivity to variability in environmental properties on non-waterlogged sites. The index r2 < 0.6 suggested a fluctuating forest increment that reflects environmental variability inconsistently. The fluctuating increment most affected the spruce and pine stands grown from upland to submontane locations. Montane spruce stands, as well as rock pines, appeared to be one of the most sensitive ones to environmental change. Floodplain forests seemed as adaptable to variable environmental properties.O

Influence of processing techniques on microstructure and mechanical properties of a biodegradable Mg-3Zn-2Ca alloy

New Mg-3Zn-2Ca magnesium alloy was prepared using different processing techniques: gravity casting as well as squeeze casting in liquid and semisolid states. Materials were further thermally treated; thermal treatment of the gravity cast alloy was additionally combined with the equal channel angular pressing (ECAP). Alloy processed by the squeeze casting in liquid as well as in semisolid state exhibit improved plasticity; the ECAP processing positively influenced both the tensile and compressive characteristics of the alloy. Applied heat treatment influenced the distribution and chemical composition of present intermetallic phases. Influence of particular processing techniques, heat treatment, and intermetallic phase distribution is thoroughly discussed in relation to mechanical behavior of presented alloys.Web of Science911art. no. 88

The Complex Evaluation of the Impact of COVID-19 Pandemic at Universities: A Soft Computing Approach

The COVID-19 pandemic impacted the educational process since the teaching process has been forced to go online in many countries. This enforced change revealed the weaknesses and strengths of the national educational systems and particular institutions. This article aims to analyse the impact of COVID-19 at selected European universities and assess the satisfaction of students, teachers, IT staff and management. This study is unique for its systematicity and complexity – it aggregates the opinions of all interested groups of stakeholders, distinguishes several time periods (before, during and after the pandemic), and allows the respondents to express hesitance in their evaluation. The evaluation model uses fuzzy sets to capture the uncertainty and to aggregate the opinions of different stakeholder groups. The empirical results show that most of the satisfaction development is the same or similar for all institutions examined. Then, the pandemic strongly influenced the satisfaction of all stakeholder groups at the universities examined. This impact was mostly negative, however, several lessons learnt have been revealed. Therefore, it was shown that it is highly beneficial to include these aspects to obtain a reliable picture of overall satisfaction

Development of Rich-Client Application for Industrial Company

Import 04/07/2011Tato práce je zaměřena na vývoj Java aplikací na platformě NetBeans. Popisuje platformu NetBeans jako moderní základ pro rozsáhlé aplikace. V práci jsou okrajově zmíněné i jiné technologie, používané při vývoji Java aplikací. Práce je rozdělena do tří kapitol. První kapotila popisuje jednotlivé technologie, především platformu NetBeans. Druhá kapitola se zabývá analýzou vyvíjené aplikace a třetí kapitola shrnuje implementaci nové funkcionality.This thesis is focused on development of Java applications based on NetBeans platform. It describes the NetBeans platform as a modern frameowk for large applications. There are other technologies described in this thesis, which are used in Java applications development. The thesis is separated into three different parts. First part is focused on description of individual technologies, especially NetBeans platform. The second part is an analysis of current application and the third part describes implementation of new functions.155 - Katedra aplikované informatikyvýborn

Fully-differential frequency filters with controllable active elements

Tato bakalářská práce se zabývá plně diferenčními kmitočtovými filtry, které pracující v proudovém módu a jejich řiditelnost je umožněna aktivními prvky. V první části práce se budeme zabývat teoretickým rozborem kmitočtových filtrů, popisem aktivních prvků a bližším přiblížením metody pro návrh filtrů. Druhá část se dále zabývá vlastním návrhem kmitočtových filtrů pomocí metody grafů signálových toků, převedením nediferenčních zapojení na zapojení diferenční a srovnáním výsledků takto navržených filtrů. V třetí části bude zhotoven takto navržený filtr, odměřen v laboratořích VUT pro ověření jeho funkčnosti a v poslední řadě dojde ke srovnání výsledků reálně naměřených hodnot diferenčního a nediferenčního zapojení. Poslední části práce je závěr, v kterém je provedeno zhodnocení celé práce.This bachelor thesis deals with the fully-differential frequency filters that work in current-mode and the tunability is made possible by active elements. In the first part we will deal with theoretical analysis of frequency filters, and a closer approximation of a filter design method. The second part deals with designing of frequency filters using signal-flow graphs method, converting not differential structures to differential structures and comparing the results of proposed filters. In the third part will be made up our suggested filter. It will be also measured out in VUT laboratory to verifying his functionality. Last we will compare results of real detect values of differential and not differential connection. The last part is the conclusion, in which an assessment of the whole work is made.

Design and Implementation of the Logging Framework

Import 26/06/2013Tato práce je zaměřena na vývoj enterprise aplikací na platformě Java. Práce je rozdělena do tří kapitol - jedné teoretické a dvou praktických. V teoretické části se především rozebírá problematika návrhu informačních systémů a objektivně relačního mapování, jakožto řešení perzistence v aplikacích. Dále jsou zde zmíněny důležité moderní technologie pro vývoj robustních aplikací s kvalitním uživatelským rozhraním. Druhá kapitola představuje analýzu a návrh konkrétní aplikace. Přes sběr uživatelských požadavků až po návrh systému je vše řízeno metodikou Unified Process. Poslední kapitola se zaobírá konkrétní implementací navrženého systému za použití technologií zmíněných v první části práce. Popis implementace jednotlivých aspektů systému zahrnuje konkrétní informace včetně zdrojového kódu.This thesis is focused on development of enterprise applications in Java. Thesis is separated into three parts - one theoretical and two practical. The theoretical part is mainly focused on issue of the process of development information systems and object-relational mapping, which is the efficient way how to solve persistence problem in applications. There are also described important modern technologies for development of robust applications with high quality user interface. Second part reflects analysis and desing processes of application development. Every step from collecting requirements to final desing of the information system was in accordance with Unified Process development framework. Last chapter is about implementation of designed information system using technologies described in the first part. Description of the implementation of individual aspects of the system inclues specific information with source code.155 - Katedra aplikované informatikyvýborn

Fully-differential frequency filters with controllable active elements

This bachelor thesis deals with the fully-differential frequency filters that work in current-mode and the tunability is made possible by active elements. In the first part we will deal with theoretical analysis of frequency filters, and a closer approximation of a filter design method. The second part deals with designing of frequency filters using signal-flow graphs method, converting not differential structures to differential structures and comparing the results of proposed filters. In the third part will be made up our suggested filter. It will be also measured out in VUT laboratory to verifying his functionality. Last we will compare results of real detect values of differential and not differential connection. The last part is the conclusion, in which an assessment of the whole work is made