Study of the Impact of Microstructure and Sorption Properties of the Renovation Plasters on the Wall Drying Rate

The purpose of the study was to determine the relationship between the microstructure and sorption properties of plasters and the drying rate of walls made of sandstone, silicate bricks, ceramic Gothic and Cadinen bricks. The porosity of plasters was 30%, 40% and 50%, and they differed in water sorption. The studies were carried out with one and two layers of plaster. It was demonstrated that the properties of the renovation plasters influence their drying rate. Plasters with a polymodal distribution of pore size and porosity of 50% shortened the wall drying rate, while monomodal distribution and hydrophobic plasters extended the wall drying rate

Study of the Properties of Renovation Plasters as a Function of Air Content and Porosity Using an Orthogonal Design of Experiment

The main message of the article is an analysis of the impact of: the aerating agent, cement, polymer additives, cellulose ethers, and perlite on renovation plaster porosity. To determine the impact, an orthogonal design of experiment proposed by Taguchi was used. The results show that the air content in the mixture does not necessarily indicate high porosity of the hardened mortar and vice versa. This is because not all of the factors analyzed in this experiment have significant impacts on the output. In terms of air content in fresh mortar, cement and aerating agent are significant factors. In terms of porosity in fresh mortar, cement, aerating agent, perlite and cellulose ethers are significant factors. Additionally, the studies are presented to explain the impacts of these ingredients

IS for Administration of GPS Tracks and Logs

Tato Bakalářská práce má za úkol zanalyzovat a odstranit nedostatky informačního systému, který vznikl v akademickém roce 2017/2018 jako diplomová práce a po jehož nasazení do ostrého provozu odhalil nedostatky neslučitelné s běžným užíváním. Součástí práce je i navržení nové datové vrstvy a s využitím nových technologií naimplementovat novou prezentační vrstvu systému. Dalším cílem je také přidat do informačního systému možnost zpracování formátu FIT. Hotovou novou verzi systému nasadit do ostrého provozu a srovnat se stávající verzi. Dosavadní informační systém umožňuje zpracovat nejrůznější typy geolokačních logů, zobrazit je v mapě, upravovat je různými nástroji a stáhnout do různých formátů.This Bachelor’s thesis aims to analyse and eliminate the shortcomings of the information system, which was created in the academic year 2017/2018 as a thesis and after it was applied in productive environment, it revealed shortcomings incompatible with normal use. Part of this work is to design a new data layer and use new technologies to implement a new presentation layer of the system. Another goal is to add the possibility of processing the FIT format to the information system. Put the finished new version of the system into production environment and compare it with the current version. The current information system allows you to process various types of geolocation logs, display them on a map, edit them with various tools and download them in various formats.460 - Katedra informatikyvýborn

IS for Administration of GPS Tracks and Logs

Tato Diplomová práce má za úkol rozšířit informační systém, který vznikl v akademickém roce 2022/2023 jako bakalářská práce, o nové funkcionality. Tyto nové funkcionality umožní uživateli informačního systému spravovat svůj profil, okruh přátel, sdílet trasy na sociální sítě. Dále možnost vytvářet a spravovat vlastní sportovní výzvy, zúčastnit se veřejných výzev a získat odměny za umístění v nich. Systém nově taky nabídne uživateli detailnější pohled nad jeho statistikami a shlédnutí svých výsledků mezi ostatními uživateli v různých žebříčcích.This Diploma thesis is intended to extend the information system, which was created in the academic year 2022/2023 as a bachelor thesis, with new functionalities. These new functionalities will allow the user of the information system to manage their profile, circle of friends, share routes to social networks. Furthermore, the ability to create and manage their own sport challenges, participate in public challenges and receive rewards for placing in them. The system will also now offer the user a more detailed view of their statistics and to see their results among other users in different rankings.460 - Katedra informatikyvýborn

Effect of climate change on sporulation of the teleomorphs of Leptosphaeria species causing stem canker of brassicas

Leptosphaeria maculans and L. biglobosa are closely related sibling fungal pathogens that cause phoma leaf spotting, stem canker (blackleg) and stem necrosis of oilseed rape (Brassica napus). The disease is distributed worldwide, and it is one of the main causes of considerable decrease in seed yield and quality. Information about the time of ascospore release at a particular location provides important data for decision making in plant protection, thereby enabling fungicides to be used only when necessary and at optimal times and doses. Although the pathogens have been studied very extensively, the effect of climate change on the frequencies and distributions of their aerially dispersed primary inoculum has not been reported to date. We have collected a large dataset of spore counts from Poznan, located in central-west part of Poland, and studied the relationships between climate and the daily concentrations of airborne propagules over a period of 17 years (1998–2014). The average air temperature and precipitation for the time of development of pseudothecia and ascospore release (July–November), increased during the years under study at the rates of 0.1 °C and 6.3 mm per year. The day of the year (DOY) for the first detection of spores, as well as the date with maximum of spores, shifted from 270 to 248 DOY, and from 315 to 265 DOY, respectively. The acceleration of the former parameter by 22 days and the latter by 50 days has great influence on the severity of stem canker of oilseed rape

Effect of ambient humidity on dichotomous sampler coarse/fine ratios

Atmospheric aerosols were measured in August 1983 on Allegheny Mountain and Laurel Hill in southwestern Pennsylvania. Ambient humidity was observed to influence the coarse to fine particle ratios as determined by dichotomous samplers. This influence is evident in the particle mass and in its component chemical species. The sampling run with the most pronounced mass shift resulted in an apparent loss of 50 % of the fine mass and 66 % of the fine particle sulfur to the coarse fraction. The magnitude of the mass shift appears to be related to the length of time that the aerosol was in a saturated environment and also to the original dry particle size. These observations have serious implications for receptor modeling with dichotomous sampler data whenever only the fine particles are considered.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/27611/1/0000655.pd

Transmission of drug-resistant bacteria in a hospital-community model stratified by patient risk

A susceptible-infectious-susceptible (SIS) model for simulating healthcare-acquired infection spread within a hospital and associated community is proposed. The model accounts for the stratification of in-patients into two susceptibility-based risk groups. The model is formulated as a system of first-order ordinary differential equations (ODEs) with appropriate initial conditions. The mathematical analysis of this system is demonstrated. It is shown that the system has unique global solutions, which are bounded and non-negative. The basic reproduction number (R) for the considered model is derived. The existence and the stability of the stationary solutions are analysed. The disease-free stationary solution is always present and is globally asymptotically stable for R 1 it is unstable. The presence of an endemic stationary solution depends on the model parameters and when it exists, it is globally asymptotically stable. The endemic state encompasses both risk groups. The endemic state within only one group only is not possible. In addition, for R= 1 a forward bifurcation takes place. Numerical simulations, based on the anonymised insurance data, are also presented to illustrate theoretical results

Molecular screening for avirulence alleles AvrLm1 and AvrLm6 in airborne inoculum of Leptosphaeria maculans and winter oilseed rape (Brassica napus) plants from Poland and the UK

A combination of staining, light microscopy and SYBR green- and dual-labelled fluorescent probe-based qPCR chemistries with species- and gene-specific primers was employed to evaluate fluctuations in the aerial biomass of Leptosphaeria maculans spores captured by volumetric spore trappings in Poznan, Poland (2006, 2008) and Harpenden, UK (2002, 2006). Arising from these surveys, DNA samples extracted from Burkard spore-trap tapes were screened for fluctuation patterns in the frequencies of AvrLm1 and AvrLm6, the most prominent of the 15 genes that code for avirulence effectors in this Dothideomycete cause of the destructive phoma stem canker disease of oilseed rape worldwide. In Poznan, very low frequencies of AvrLm1 allele were found in the autumn of both 2006 and 2008, reflecting significantly increased cultivation of rape seed with Rlm1-based resistance. In contrast, at least six folds-higher frequencies of AvrLm6, which were also confirmed by end-point PCR bioassays on phoma-infected leaves from the same region of Poland, were obtained during both years. In the UK, however, relatively higher AvrLm1 allele titres were found in L. maculans spores captured in air samples from the autumn of 2002 on the experimental fields of Rothamsted Research, Harpenden, that were historically sown to genetically heterogeneous B. napus cultivars. In the 2006 screen these levels had plummeted, to a 1:4 ratio, in favour of frequencies of the AvrLm6 allele. Patterns of fluctuations in erg11 (CYP51) fragments coding for sterol 14α-demethylase suggest October as the month with the most viable wind-dispersed L. maculans propagules of each season of the screens

The sources of aerosol elemental carbon at Allegheny Mountain

Aerosol elemental carbon measurements were taken at two rural sites in southwestern Pennsylvania during August 1983. Carbon, though a small part of the aerosol mass at both sites, was a leading constituent of the aerosol on an atom basis. Time-weighted average concentrations at Allegheny Mountain and Laurel Hill were 1.2 and 1.4 [mu]g m-3, respectively. Absolute Principal Component Analysis followed by multiple regression and Chemical Mass Balance techniques were utilized to apportion the measured elemental carbon to its sources. Motor vehicles were estimated to be the largest source of elemental carbon at the two sites, contributing 41-68% and 34-56% at Allegheny Mountain and Laurel Hill, respectively.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/28963/1/0000800.pd