National Repository of Grey Literature 28 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Analysis of the mechanical behavior of wood by means of digital image correlation
Brabec, Martin
The full-field optical techniques such as e.g. a digital image correlation are capable to fully reflect the natural wood heterogeneity. Therefore, this thesis aspires to contribute to the experimental mechanics of wood and wood-based composites by the implementation of the full-field optical technique based on the digital image correlation to the standard mechanical tests. A supplementation of the conventional displacement sensors should help to obtain more precise mechanical characteristics and to do more sophisticated analyses of the deformation behaviour of wood and wood-based composites. The experimental part of the thesis is divided into the five independent case studies listed as the original papers. The measurements were carried out on the most wide-spread wood species in central Europe such as European beech (Fagus sylvatica, L.) and Norway spruce (Picea abies, L. Karst). Beside the solid wood, the new wood-based sandwich structure, which consists of a core made from birch plywood and the particleboard facings, was investigated too. The loading of the samples was carried out using of the standard mechanical tests such as tension, compression, three-point bending and torsion test. In the first study, the full-field deformation data were used to indentify reasons for the non-standard deformation behaviour of spruce and beech wood during compression parallel to grain. Reason for this was recognized in the abrubt compression of damage zones located near the compression plates, which induced the expansion of the middle zone located between them. The second study aimed to find out neutral axis position in native and thermally modified beech wood during the conventional three-point bending test. The relative neutral axis position was obtained from mutual position of the neutral axis and centroidal axis, which was determined based on the appropriate image processing methods. It was found that the neutral axis and centroidal sample axis are almost coincident. Objective of the third study was to determine both longitudinal shear moduli of beech wood with help of the full-field shear strains, obtained from a single torsion test, together with use of the appropriate analytical solutions for the calculation of the stress distribution within the radial and tangential direction on the longitudinal-radial and longitudinal-tangential sample surfaces. Both longitudinal shear moduli increasingly mutually differed as the load increases. Within the fourth study, verification of the elastic material model used in finite-element analyses was carried out with help of full-field deformations induced around notches within dog-bone shaped sample during the uniaxial tension. Great correlation was found between numerically predicted and experimentally measured strain data sets for both longitudinal-radial and longitudinal-tangential shear planes. The fifth study dealed with the characterization of elastic deformation behaviour of newly developed wood-based composite with a sandwich structure. Based on the full-field strain analysis the local strain concentrations were identified. They took place within the core during flatwise compression, and within the facings, when the edgewise compression test was done. A variety of presented results confirmed widespread applicability of optical methods in the mechanics of materials. Therefore, the utilization of full-field optical method based on digital image correlation in experimental mechanics of wood and wood-based composites can be highly recommended.
The effect of production parameters on the plasticity of structural steel
Brabec, Martin ; Podaný, Kamil (referee) ; Peterková, Eva (advisor)
The master thesis deals with the influence of heat treatment and storage time on microstructure and mechanical properties of 26MnB5 steel, which is used in the production of tubular components in the quenched and tempered state. The objective was to increase the plasticity of the steel by the definition of new process parameters of the induction heat treatment line. New tempering diagrams of 26MnB5 steel for two various speeds of the heat treatment line were established and used to determine new tempering temperature and speed of the heat treatment line. Observation of the influence of storage time on mechanical properties of the steel did not reveal that it is liable to ageing.
Self-ownership, its adequacy and comparison with autonomy
Matoška, Lukáš ; Brabec, Martin (advisor) ; Karásek, Jindřich (referee)
The bachelor's thesis deals with selected self-ownership approaches to abortion and suicide. It is based on the observation that in these two areas, the argumentation based on the assumption of self- possession is relatively widespread. The question is to what extent are these approaches adequate, i.e. to what extent do they correspond to real-life situations. A way to assess adequacy is proposed expanding on Margaret Olivia Little. The self-ownership approach to abortion is then shown to be inadequate in specific cases. The thesis also focuses on the libertarian approach to the issue of the right to consensual killing. Discussing the article by Peter Vallentyne, it is shown that defence of this right based on self-ownership may not be sufficient. In this context, it focuses on the relationship between self-ownership and autonomy. It shows that they enable two separate argumentative strategies by which to defend an individual's rights.
Logos liberal democracy?
Brabec, Martin
The paper presents conceptual analyzes of liberal democracy. It shows that liberal democracy appears as harmonic association of different spheres and rights but it inside contains contradiction betwen democracy (collective decision) and liberal principle which emphasis constitutional personal rights. Misunderstanding of this distinction lead to confusion of democracy with liberal democracy.
Single Point Incremental Forming
Brabec, Martin ; Podaný, Kamil (referee) ; Peterková, Eva (advisor)
Incremental metal sheet forming has gone through a period of development and enjoys increased attention of industry for its unique benefits and properties. This work aims for an up to date state-of-the-art review of incremental metal sheet forming focused mainly on single point incremental forming appended by a review of used tools, machines and applications.
Unconditional Basic Income. The Tool for Elimination of Social Accidents
Brabec, Martin
The paper introduces a conception of Universal basic income. First part presents its traits and historical roots. Next part concentrates on an issue of moral argument for implementing basic income. And the last, main, section focuses on six of features of basic income supporting of elimination of social accidents.
Bi-party political system in Czech lands 1938 - 1939: National Union Party and the National Labour Party
Kulíšek, Vítězslav ; Stracený, Josef (advisor) ; Brabec, Martin (referee)
The diploma thesis deals with Czech political system in the second Czechoslovak Republic (1938 - 1939). In this historically short period, liberal democracy has changed into an authoritative democracy. The power of the right-wing parties prevailed in the political system. In the case of Czech countries a bi-party political system, which is unique in Czech history, has been created. The main aim of the diploma thesis is to describe the political party system in the Czech lands in the Second Republic period, and to look at the political parties that formed it. It also deals with the Second Republic in general, with the historical, economic, cultural and social context of that time. In the final part, there are summarized all the conclusions I came to. The sources were mainly archive sources, specialized literature dealing with the subject and political party periodicals but even non-political periodicals from that time. KEYWORDS Antonín Hampl, authoritarian democracy, Czech - Slovak Republic, Second Republic, Bi-party political system, Munich agreement, Nazi Germany, National Labour Party, Rudolf Beran, National Union Party
Humanity and democracy againts inhumanity and totalitarianism
Meissner, Vladimír ; Havlík, Radomír (advisor) ; Mervart, Jan (referee) ; Brabec, Martin (referee)
The twentieth century brought with it two periods of totalitarian experimentation that together resulted in the death of millions of people: Fascism in the form of German National Sozialism (Nazism) and Communism in the form of Soviet Stalinism. It was a great victory for the human spirit when both these totalitarian periods ended. People did learn a lot from them. Firstly, that human destitution was at the root of both these criminal regimes and in addition human malice together with the hatred of certain groups against others. It was this hatred that led to the criminal conspiracy of their leaders against other individuals who stood in their way. They misused the state as an instrument for the disposal of their opponents and found a "scientific" justification for their crimes. The philosophy of people who viewed progress as nothing more than using reason and who placed this above the other constituents of human life - above emotions, above the spirit of wisdom and the human moral values that make us complete unfettered - was twisted. These criminals against humanity were able to degrade an individual into a number, a race, a class, and suchlike categories. They deprived individuals of their humanity and humiliated them. This they viewed as representing their victory and their superiority over others. For...
Rules of conduct of a securities broker with respect to his/her customers
Brabec, Martin ; Čech, Petr (advisor) ; Oehm, Jaroslav (referee)
67 English Summary Title: Rules of Conduct of an Investment Firm towards Customers Summary: The purpose of my thesis is to analyse Czech legal regulation of business activities on capital market with focus on rules of conduct of an investment firm towards customers (henceforth only as "rules of conduct"). The reason for my research is that this regulation has been modified recently due to implementation of the EU directive on markets in financial instruments (so called MiFID. Therefore this topic is currently actual in this field of business. At the same time it is interesting to observe this special regulation on the background of general legal regulation especially regulation set up in Czech Commercial Code (but not only in this codex). The thesis is composed of nine chapters, each of them dealing with different aspects of rules of conduct structured in chronological order. Chapter One is introductory and defines purpose and methodology of the thesis. In Chapter Two there is an entrance to the subject matter itself from historical and theological points of view. Chapter Three explains basic terminology necessary for understanding the thesis such as Financial Instrument, Investment Service (Activity), Investment Firm and Customer. Chapter Four introduces general rules of conduct on which following specific...

National Repository of Grey Literature : 28 records found   1 - 10nextend  jump to record:
See also: similar author names
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