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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
661

Úprava bělící technologie při výrobě buničiny z jednoletých rostlin / Modification of bleaching technology in production of annual plants pulp

Kouřil, Čeněk January 2021 (has links)
Diplomová práce se zabývá bělícím procesem při výrobě papíru. Hlavním cílem práce je zhodnotit současný stav bělící technologie ve firmě OP Papírna, s.r.o. a navrhnout úpravu, která povede k větší efektivitě této technologie. K vyřešení zadání byla provedena rešerše technologických principů bělení a dále provedeny laboratorní experimenty s cílem najít vhodné řešení. Přínos experimentů byl podpořen technologickými výpočty. Výsledky experimentů ukázaly, že současný stav bělící technologie lze několika způsoby zefektivnit. Bylo ukázáno, že podané návrhy mají potenciál velkých ekonomických i chemických úspor. Čtenáři práce se dostane základního přehledu technologie výroby buničiny a papíru se zaměřením na bělící proces a získá znalost jeho bilančních výpočtů.
662

Návrh experimentu / Design of Experiment

Lachnit, Zdeněk January 2011 (has links)
The main subject of this master thesis is to evaluate using of Design of Experiment in industrial company in the development of LED modules for cars. In background study Design of Experiment methodology is described. Next part of background study describes the general principles of termography measurements, next chapter includes the information’s about LED technology and temperature degradation. At the beginning of the practical part is a description of the team analysis due to selection of factors, next chapter validates importance of vias. In next chapter methodology of print circuit board preparations and measuring are described. A next chapter describes the implementation of design of experiment at voltages 8 V, 13,5 V, 16,5 V. Designs of Experiments were made for four or five factors. The reason for this decision was the manual adjustment of printed circuit boards. At the end of each Design of Experiment is the recommendation of factors and interactions settings with regard on response, which is the minimal temperature. At the end of master’s thesis is the final evaluation.
663

Návrh metod na hodnocení kapacit letištních subsystémů / Design of assessment methods for airport subsystem capacity

Londa, Jaroslav January 2013 (has links)
This thesis discusses the capacity of airport subsystems and describes various assessment methods of capacity including factors that affect it. The first part contains theoretical analysis of assessment methods for airport subsystems especially runway and terminal. The practical part deals with experimentation using the simulation software Visual Simmod. The objective of these experiments is to evaluate the effect of certain factors to runway operations and observe the change of aircraft delay over the capacity. In the end all simulation results are analyzed and shown in graphs.
664

Zvyšování účinnosti vakuového odpařování / Vacuum evaporation efficiency improvement

Havlásek, Martin January 2015 (has links)
This thesis is focused on experimental work in the domain of vacuum evaporation efficiency improvement. The first part introduces theory of liquids evaporation and its influencing factors, then multi-stage flash distillation technology. The next part of theory is an overview of other technologies used for desalination of sea water and introduction to the design of experiments. In the practical part are selected factors affecting efficiency of device and experiment plan is designed for them. When the experiment is done, optimal operating conditions of technology are designed on basis of analysis.
665

Critical Factors of Post-Harvest Nitrous Oxide Emissions from Oilseed Rape – Cereal Rotations / Evaluations Based on Field Studies and Stable Isotope Labeling

Köbke, Sarah 17 May 2017 (has links)
No description available.
666

Nízkoteplotní polarizovaný terč pro studium spinové struktury nuklonů v experimentu COMPASS / Low temperature polarized target for spin structure studies of nucleons at COMPASS

Pešek, Michael January 2014 (has links)
Title: Low temperature polarized target for spin structure studies of nucleons at COMPASS Author: Bc. Michael Pešek Department: Department of low temperature physics Supervisor of the master thesis: prof. Ing. Miroslav Finger, DrSc. Abstract: In presented thesis we describe concept of Deep Inelastic Scattering of leptons on nucleons in context of nucleon spin structure studies. Both polarized and unpolarized cases are discussed and concept of Transverse Momentum Dependent Parton Distribution Functions (TMD PDF) is introduced. The possibility of TMDs measurement using Semi-inclusive DIS (SIDIS) is described along with related results from COMPASS experiment. The future Drell-Yan programme at COMPASS is briefly mentioned and its importance is presented on the universality test i.e. change of sign of T-odd TMDs when measured in Drell-Yan and SIDIS. The importance of Polarized Target (PT) for spin structure studies is highlighted and principles of Dynamic Nuclear Polarization (DNP) are given using both Solid effect and spin temperature concept. COMPASS experiment is described in many details with accent given to PT. Finally the thermal equilibrium (TE) calibration procedure is described and carried out for 2010 and 2011 physics runs at COMPASS. The average polarization measurement results from 2010 and 2011 are...
667

Důsledky polyploidizace pro invazní potenciál druhu Vicia cracca / Impact of polyploidy on the invasive potential of Vicia cracca

Líblová, Zuzana January 2014 (has links)
This work is about diploids and tetraploids of Vicia cracca species, the two commonly occurring cytotypes. The first part is devoted to the distribution of cytotypes of this species in the secondary range in North America. It was hypothesised that polyploid species become invasive more frequently than diploid species. Their greater success may be given by greater variability of genes obtained by polyploidisation and gene subfunkcionalizing. All invasive populations of Vicia cracca species involved in this study were tetraploid. Based on this we can say that only tetraploids are invasive in this secondary colonized area. Polyploid species can be better competitors thanks to their expected better growth characteristics and stress resistance. Therefore the second part of this work is testing the hypothesis that polyploids are more variable in size of different parts of the plant body and therefore more able to grow even in conditions that are not suitable for diploids. As predicted by the EICA hypothesis (evolution of increased competitive ability), secondary colonized area also provide more space for further evolution and we can expect that growth characteristics of plants from the invasive range will differ from plants of the same ploidy from the original distribution range. This part of the work...
668

Zkoumání vlastností top kvarku pomocí experimentu ATLAS na LHC / Investigation of properties of the top quark with the ATLAS experiment at LHC

Berta, Peter January 2016 (has links)
This thesis presents the measurement of the differential cross section of the top-antitop pair production in proton-proton collisions at center-of-mass energy of 8 TeV at the ATLAS experiment. The measurement is performed for top-antitop events in the single lepton decay channel in the boosted topol- ogy. The measured differential cross section is expressed as a function of the top quark transverse momentum at particle level and at parton level. The mea- sured distributions are compatible with the theoretical predictions of the Standard Model. The experimental techniques used in this measurement are discussed with emphasis on the jet reconstruction and on the identification of jets originating from b-quark fragmentation. The jet reconstruction is influenced by simultane- ous proton-proton collisions (pileup), and the mitigation of these pileup effects is studied. A novel pileup subtraction technique for jets is proposed using an ex- tension of the methods currently being employed by the LHC experiments. The new method has a good performance in removing the pileup contributions at the level of jet constituents. 1
669

Teams contribute more and punish less

Auerswald, Heike, Schmidt, Carsten, Thum, Marcel, Torsvik, Gaute 29 September 2016 (has links)
Challenges in global politics like climate change, maritime piracy and fighting highly contagious diseases concern global public goods. The related policy decisions are mostly made by teams. In contrast, economic models of global public goods typically assume a single rational decision-maker. We use a laboratory experiment to compare team decisions to decisions of individuals in a finitely repeated public good game with and without a costly punishment option. Teams of three participants coordinate on decisions either by majority or unanimity rule. We find that in absence of a punishment option teams contribute more to the public good than individuals. With a punishment option subsequently to the contribution decision team treatments exhibit a less frequent use of anti-social punishment and lower levels of social as well as anti-social punishment. Extreme preferences for punishment are eliminated by the majority decision rule. Overall, team decisions are closer to the social optimum and teams yield higher net payoffs when compared to individuals.
670

Tělo, dohled a etika / Body, Surveillance and Ethics

Charvát, Martin January 2018 (has links)
Body, Surveillance and Ethics PhD Thesis Mgr. Martin Charvát, Ph.D. Abstract The aim of my dissertation thesis is to analyze the dispositions of non-normative ethics as presented in works of M. Foucault, G. Deleuze and J. Derrida. My hypothesis is that non- normative ethics must be conceived as an interpretation and thematization of the meaning of the relationship between body, surveillance, event and experiment. What brings together Foucault, Deleuze and Derrida is the critique of externally constituted moral codes that are always creating a historically-economically-polico-socially determined subject, or certain norms of conduction and behaviour that are considered to be "good" or "right". However, the above-mentioned authors have based their conceptions on the belief that the human life should be characterized by freedom, or the potential of articulation of an individual (or his behaviour/action), regardless of external moral determinations. Foucault, Deleuze and Derrida distinguish the possibility of a constant crossing of given institutional and socially grounded constraints, with the goal of the constant shaping of ones live that would not be restricted by normative and prescriptive rules. The theme of freedom is given into context of the experimental self-formation that takes place at the moment of...

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