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XPS analýza plazmových polymerů a nanokompozitních vrstev bez přerušení vlákna / XPS analysis of plasma polymers and nanocomposite films without breaking vacuumArtemenko, Anna January 2013 (has links)
Title: XPS analysis of plasma polymers and nanocomposite films without breaking vacuum Author: Anna Artemenko Institute: Charles University in Prague, Department of Macromolecular Physics Supervisor of the doctoral thesis: Prof. RNDr. Hynek Biederman, DrSc., Charles University in Prague, Department of Macromolecular Physics. Abstract: Plasma polymers and metal/ plasma polymer nanocomposites have been widely used for various biomedical proposes. Naturally, surface properties of the coatings such as high wettability, stability on the open air and in aqueous media, resistance towards different sterilization processes and cells adhesion are required for bioapplications. This thesis is mainly dedicated to the investigation of chemical composition of deposited coatings using XPS analysis. Nylon-like plasma polymer, PEO-like coatings, fluorocarbon plasma polymer (PTFE) films and Au/PEO-like, Ag/C:H, Al/C:H nanocomposites were chosen as the subject material. In addition, results of XPS measurements were used for the computer simulation for calculation of filling factor of metal/ plasma polymer nanocomposites. These results were in a good agreement with experimental data. Keywords: plasma polymer, nanocomposite, XPS analysis, bioapplication, simulation.
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Kalkulace zavedení alternativního pohonu dopravních prostředků ve středně velkém podnikuGelnarová, Alice January 2014 (has links)
This thesis deals with the introduction of alternative propulsion vehicles in a medium-sized enterprise. The starting point of the work is time series of fuel prices modelation: CNG gas, Natural 95 and Diesel during the years 2008--2013 and a two-year prediction of the prices, including the estimation of the uncertainty associated with the development of prices. The prediction is then used in simulations to estimate the probable development and effect of investments. The result of this thesis is formulated in a general methodology for the possible purchase of new cars in the midmarket and practical applications to mid-sized company MIKROP ČEBÍN a.s.
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Konvoluční reverb s využitím technologie VSTTrtek, Stanislav January 2014 (has links)
Trtek, S. Convolution reverb using VST technology. Diploma thesis. Brno: Mendel University, 2014. The diploma thesis deals with guitar amp miking, analog and digital guitar cabinet simulation, amp modeling, digital signal processing, loudspeaker measurement using impulse response and VST -- Virtual Studio Technology. Main aim of this thesis was to implement VST plugin that realises guitar cabinet simulator reproducing typical characteristics -- dynamics and nonlinear behavior.
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Návrh a implementace algoritmu SLAM pro mobilní robotOndráček, Jan January 2015 (has links)
This diploma thesis deals with the implementation of selected simultaneous locali-zation and mapping (SLAM) algorithm for mobile robot and testing of this algo-rithm. In theoretical part there is a research that describes various existing SLAM algorithms. One of these algorithms is selected for the implementation based on the selected criteria at the end of the research. Practical part of the thesis deals with the implementation of selected SLAM algorithm in particular programming language and with its testing on real data. Computer simulation in which model of the robot travels through the model of Q Building of Mendel University in Brno is created for the purpose of testing.
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Posouzení použitého druhu dřeva na vlastnosti jádra snowboardové desky / Assessment of the impact of the type of wood on the properties of snowboard board coreJiřík, Adam January 2016 (has links)
Snowboarding as one of the fastest developing sports nowadays forces
manufacturers to improve equipment for this sport or to introduce other innovations
that would enhance pleasure of the ride. The most important and expensive part of the
equipment is the snowboard itself. So far, the high-quality snowboards with the best
ride properties include wood core. Every year a competition called Good Wood is
organized for the best snowboard models of the season.
This thesis deals with design and assessment of the new innovative composition
of snowboard cores using different combinations of wood and other structural solutions.
These compositions were compared with an already time-proven composition currently
used by Hackboards Ltd. company. By using the stress simulation with the finite
element method in SolidWorks Simulation program the stress progress and the
deflection size of designed cores and the reference core were found out. Part of this
thesis was also determining some of the physical and mechanical properties of native
wood types according to relevant norms. Measured values were used to verify
possibilities of using data of appropriate wood type from literatur efor simulation.
Designed composition of the wood core formed by battenboard combining by
poplar and beech reached very similar values as the reference composition formed by
battenboard made of poplar and ash. The composition of combined laminated poplar
and beech veneers showed a little worse properties. The composition formed by beech
battenboard and the composition of laminated beech veneers showed worse properties
in comparison with the reference composition.
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Analýza a modelování struktury a vývoje smíšených porostů v oblasti Sudetské soustavy / Analysis and modeling of the structure and development of mixed forest stands in the Sudety mountainsVacek, Zdeněk January 2016 (has links)
The thesis deals with analysis and modeling of the structure and development of selected mixed forests in protected areas of the Sudeten system, especially in the Giant Mountains national parks, Protected Landscape Area Broumovsko and Orlické Mountains, but also in other areas of the Czech Republic. This study is composed of a set of six published manuscripts that are covering three thematic ranges: structure of forest stands, regeneration of forest stands and forest modeling. The main objective of this work was to evaluate a vertical, horizontal and species structure, total diversity and development of mixed forest stands in central Sudetes. The partial aim was to analyse production parameters of forest stands, effect of microrelief and game on natural regeneration and assessment of dead wood in the area of interest. Further, the objective of the study was to develop explicit and non-explicit crown width and slenderness quotient models for Norway spruce (Picea abies L.) and European beech (Fagus sylvatica L.) and to predict the development of mixed forest ecosystem using growth simulations and to evaluate parameters and interactions among stand structure, climatic factors and natural regeneration, using especially analysis of variance, correlation matrix, spatial statistic and multivariate analysis. For this purpose a system of permanent research plots was used, which are regularly monitored since 1980 or were newly established. Using mapping technology FieldMap, selected parameters were measured for tree layer, natural regeneration individuals and dead wood. The results showed that the spatial distribution of beech stands in optimum stadium changes with the altitude from the regular pattern through random to aggregated spatial pattern of beech forests near the timberline. The spatial distribution of natural regeneration is highly aggregated, distribution of stumps is random and horizontal structure of the centroids of the crowns is always more regularly distributed than stems due to crown plasticity. Browsing damage of the leading shoot by game is an important limiting factor for height growth of natural regeneration, especially for silver fir (Abies alba Mill.), rowan (Sorbus aucuparia L.) and sycamore maple (Acer pseudoplatanus L.). The study of the influence of microrelief on the growth of beech regeneration showed that the highest average height was found on slope and pits, while the lowest on the mounds. From the effect of climatic factors on the radial growth of trees, it was found that temperature is a limiting factor for growth in mountain areas, respectively that positive effect of temperature decreases with decreasing altitude and conversely the influence of precipitation increases. Finally, spatially explicit models (as opposed to non-explicit) described a larger part of the crown width variations for spruce and beech and of the slenderness quotient for spruce. The largest contribution to the models after breast diameter was dominant height.
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Vliv sněhové pokrývky na odtok během dešťových srážek. / Effect of snowpack on runoff generation during rain on snow event.Juras, Roman January 2016 (has links)
During a winter season, when snow covers the watershed, the frequency of rain-on-snow (ROS) events is still raising. ROS can cause severe natural hazards like floods or wet avalanches. Prediction of ROS effects is linked to better understanding of snowpack runoff dynamics and its composition. Deploying rainfall simulation together with hydrological tracers was tested as a convenient tool for this purpose. Overall 18 sprinkling experiments were conducted on snow featuring different initial conditions in mountainous regions over middle and western Europe.
Dye tracer brilliant blue (FCF) was used for flow regime determination, because it enables to visualise preferential paths and layers interface. Snowpack runoff composition was assessed by hydrograph separation method, which provided appropriate results with acceptable uncertainty. It was not possible to use concurrently these two techniques because of technical reasons, however it would extend our gained knowledge. Snowmelt water amount in the snowpack runoff was estimated by energy balance (EB) equation, which is very efficient but quality inputs demanding. This was also the reason, why EB was deployed within only single experiment.
Timing of snowpack runoff onset decrease mainly with the rain intensity. Initial snowpack properties like bulk density or wetness are less important for time of runoff generation compared to the rain intensity. On the other het when same rain intensity was applied, non-ripe snowpack featuring less bulk density created runoff faster than the ripe snowpack featuring higher bulk density. Snowpack runoff magnitude mainly depends on the snowpack initial saturation. Ripe snowpack with higher saturation enabled to generate higher cumulative runoff where contributed by max 50 %. In contrary, rainwater travelled through the non-ripe snowpack relatively fast and contributed runoff by approx. 80 %.
Runoff prediction was tested by deploying Richards equation included in SNOWPACK model. The model was modified using a dual-domain approach to better simulate snowpack runoff under preferential flow conditions. Presented approach demonstrated an improvement in all simulated aspects compared to the more traditional method when only matrix flow is considered.
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Numerické simulace teplotního a vlhkostního pole ve dřevě v prostředí se zvýšenou teplotouKubelková, Květa January 2015 (has links)
The thesis deals with numerical simulation of temperature field with internal heat sources and experimental verification of this model in an environment where the high temperatures are applied (during thermal modification of wood). The work was further extended by analysis of coupled heat and monture transfer in the wood. Designed mathematical models are solved numerically using software COMSOL Multiphysics based on the finite element analysis (FEM). The chemical reactions occur due to decomposition of woodconstituents (cellulose, hemicelluloses and lignin) are taken into account in present study. These reactions are usually not solid in known models. The results of numerical simulations of temperature field, including pyrolysis model, are compared with experimental measurements for verification of the proposed model. Contribution of this thesis is the possible application of the proposed model for the design and optimization of thermal modification Schedule with respekt to wood species and sample dimensions.
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Hranice fikce / The Borders of FictionSEVERA, Tomáš January 2015 (has links)
The submitted master's thesis focuses on issues of fiction. First, it pursues the competing definitions of the term itself in order to define it as non-referential sign afterwards. In chapters two to four it presents and comments three traditional approaches to fiction formal, semantic and pragmatic. In chapter five, which is the largest one of the entire work, it addresses in the writings of theorists who largely try to move around the presumed border between fictional and factual narration, usually represented by historiographical works. And finally in chapter six it deals with insights brought to the traditional theories of fiction by two versions of relatively new discipline the simulation theory.
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Analýza maloobchodních příležitostí a ohrožení v oblasti Třešťsko / Analysis of retail opportunities and threats in Třešťsko regionALDORF, Martin January 2013 (has links)
The topic of this work is the software NetLogo used with the model Retail Opportunity Sim. This computer model is applied to the region Třešťsko. The goal of this work is to calibrate the Retail Opportunity Sim model and to find out, which problems and complication are connected with using of this software on so small region as Třešťsko.
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