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Sensitivity analysis of stability problems of steel structures
Valeš, Jan ; Vičan,, Josef (referee) ; Kučerová,, Anna (referee) ; Melcher, Jindřich (referee) ; Kala, Zdeněk (advisor)
The doctoral thesis is focused on evaluation of global sensitivity analysis of load-carrying capacity of steel hot-rolled beams. These beams are subjected to lateral-torsional buckling, weak axis buckling and strong axis buckling. Very comprehensive computational models which were both geometrically and materially nonlinear were created in Ansys software using solid finite elements to calculate the load-carrying capacity. The computational models allowed modelling of random initial imperfections such as initial curvature, deviations of cross-section dimensions and steel properties. Sensitivity analysis quantified their influence on the load-carrying capacity. Simulation runs of random imperfections were generated using the Latin Hypercube Sampling method. Since the evaluation of sensitivity analysis of load-carrying capacity of all finite element models would cost an extreme amount of computer time, the thesis aimed at developing a meta-model (also known as surrogate model) based on approximation of FEM model. The approximation polynomial then facilitated the evaluation of sensitivity indices using a high number of simulation runs. At the end, the relationships between the slenderness and the first and second-order sensitivity indices are plotted in graphs. Those random input imperfections that influence the variability of load-carrying capacity the most are pointed out.
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Reliability analysis of thin-walled cylindrical tanks for crude oil storage
Serbousková, Kateřina ; Valeš, Jan (referee) ; Kala, Zdeněk (advisor)
This bachelor thesis is focused on the reliability of rotationally symmetric thin-walled cylindric tank for crude oil storage. The general form, membrane state, and balance equation of rotationally symmetric shell is described in the first part of the bachelor thesis. The second part of this bachelor thesis describes the probabilistic analysis of reliability of the tank by using Cornell's index of reliability. At the end the model of tank was created in ANSYS software, which indicates processes of stresses and deformations of the particular load.
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Human openness : In theology of Karl Rahner and Wolfhart Pannenberg
Valeš, Jan ; Štefan, Jan (advisor) ; Houkal, Jan (referee) ; Macek, Petr (referee)
The thesis Human openness : In theology of Karl Rahner and Wolfhart Pannenberg is dealing with the term 'openness' in a theological sense when it speaks of an essential characteristics of human being. Rahner and Pannenberg surpass all the other authors in 20-th century who use this term in their consistency of usage and richness of its meaning. First and largest part of the thesis offers analysis of both authors and their usage of the term, from earliest works to the final comprehensive presentations of their systematic theology. Second part takes the term under the test of imago Dei doctrine, teaching about sin, and about the salvation in the Gospel of Jesus Christ. Secondary literature helps to see value of their theology. One of the results of this test is the fact that we can speak about one notion of openness since the similarities of both authors prevail over the differences. Third part of the thesis offeres creative possibilities of work with notion of openness. Conclusion contains suggested definition of the notion by these two authors. Powered by TCPDF (www.tcpdf.org)
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Sensitivity analysis of stability problems of steel structures
Valeš, Jan ; Vičan,, Josef (referee) ; Kučerová,, Anna (referee) ; Melcher, Jindřich (referee) ; Kala, Zdeněk (advisor)
The doctoral thesis is focused on evaluation of global sensitivity analysis of load-carrying capacity of steel hot-rolled beams. These beams are subjected to lateral-torsional buckling, weak axis buckling and strong axis buckling. Very comprehensive computational models which were both geometrically and materially nonlinear were created in Ansys software using solid finite elements to calculate the load-carrying capacity. The computational models allowed modelling of random initial imperfections such as initial curvature, deviations of cross-section dimensions and steel properties. Sensitivity analysis quantified their influence on the load-carrying capacity. Simulation runs of random imperfections were generated using the Latin Hypercube Sampling method. Since the evaluation of sensitivity analysis of load-carrying capacity of all finite element models would cost an extreme amount of computer time, the thesis aimed at developing a meta-model (also known as surrogate model) based on approximation of FEM model. The approximation polynomial then facilitated the evaluation of sensitivity indices using a high number of simulation runs. At the end, the relationships between the slenderness and the first and second-order sensitivity indices are plotted in graphs. Those random input imperfections that influence the variability of load-carrying capacity the most are pointed out.
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The development of the EU Common Foreign and Security Policy and its manifestation in civilian missions
Valeš, Jan ; Antal, Jarolím (advisor) ; Hnát, Pavel (referee)
The present theses analyses external actions of the EU institutions tasked to implement the CSDP. The text attempts to establish to what extent the CSDP has been practically implemented in the period following the Treaty of Lisbon's coming into effect. To accomplish the task I have chosen to analyze two cases of the EU's involvement in African countries, namely in Libya and Niger. The development of the EU's external action was long and uneasy. The unification of EU's external actions and goals was putted forward by the Treaty of Lisbon. The CSDP is based on consensual negotiations between the governments of individual member states with often differing interests in the international realm. Towards the conclusion, the text demonstrates that the institutions created by the Lisbon Treaty fulfill their role in implementing the prescribed course of external action by the means of various instruments including issuing statements, convening international forums, and cooperating with regional partners. In conclusion, it can be said that in the attempts to assist in solving various issues in African countries and elsewhere the EU clearly demonstrates its intention to stabilize the socio-political situation in individual regions hence deliver on the aim of a peaceful and safe neighborhood.
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Human openness : In theology of Karl Rahner and Wolfhart Pannenberg
Valeš, Jan ; Štefan, Jan (advisor) ; Houkal, Jan (referee) ; Macek, Petr (referee)
The thesis Human openness : In theology of Karl Rahner and Wolfhart Pannenberg is dealing with the term 'openness' in a theological sense when it speaks of an essential characteristics of human being. Rahner and Pannenberg surpass all the other authors in 20-th century who use this term in their consistency of usage and richness of its meaning. First and largest part of the thesis offers analysis of both authors and their usage of the term, from earliest works to the final comprehensive presentations of their systematic theology. Second part takes the term under the test of imago Dei doctrine, teaching about sin, and about the salvation in the Gospel of Jesus Christ. Secondary literature helps to see value of their theology. One of the results of this test is the fact that we can speak about one notion of openness since the similarities of both authors prevail over the differences. Third part of the thesis offeres creative possibilities of work with notion of openness. Conclusion contains suggested definition of the notion by these two authors. Powered by TCPDF (www.tcpdf.org)
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Importance of communication elements for management
Valeš, Jan ; Fiedler, Jiří (advisor) ; Stanislav, Stanislav (referee)
This thesis deals with the importance of communication elements for managerial activities. It focuses on the various forms and types of communication, identifies
the specific elements that occur in the communication process of managers and determines the specific communication barriers that managers face.
Formally, this thesis is divided into two parts. The first part consists
of the theoretical background and the current state of the problem and the following part contains the own work based on primary research. Data for the research have been obtained from selected respondents who have participated on the survey. Subsequently, findings have been evaluated in order to determine the importance of the managerial communication elements to their work, meaning and use forms of communication, content of communication as well as communication channels.
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Videocamera Based Security Guard for OS Linux
Valeš, Jan ; Herrman, Tomáš (referee) ; Škarvada, Jaroslav (advisor)
This thesis deals with the implementation of security guard software for OS Linux using an appropriate web camera. The main part of this application is process running in background using V4L application interface to communicate with web cam. Because this program uses dynamically loaded plug-ins for motion detection, it is very simple to change detection algorithm just by modifying configuration file. Application data can be saved as images or video files. Client application was created for online monitoring by user. It communicates with security guard software over network by TCP/IP protocol. Implemented application layer protocol allows simple client authentication and data encryption.
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Computer simulation of building collapse due to formation of plastic hinges
Valeš, Jan ; Kala,, Zdeněk (referee) ; Vlk, Zbyněk (advisor)
The aim of the thesis is to create an analytical 2D model of a multi-storey building and its consequent loading until the point of collapse which occures due to formation of plastic hinges. The first part is going to present a linear analysis of the problem; it focuses on location and level of load when the plastic hinges are formed. Then a nonlinaer analysis is going to be performed by RFEM programme using postcritical analysis and dynamic relaxation. Differences between the results of mentioned types and methods of analysis are going to be compared and an impact of variables is going to be evaluated .
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