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Security Tool for wifi Network
Hala, Martin ; Henzl, Martin (referee) ; Kačic, Matej (advisor)
The main purpose of this tool is testing wireless networks security level for both personal and commercial use. It is based on latest knowledge about security of wireless networks. Key features are: portability - implemented on live linux distro, simple manipulation - well aranged GUI, testing - rich options of tests selection, security level evaluation - recommendations consequent on NIST standard.
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DISPLACEMENT FIELD ANALYSIS IN WEDGE SPLITTING TEST\nSPECIMEN BY ODM METHOD
Seitl, S. ; Miarka, P. ; Růžička, V. ; Malíková, Lucie ; Merta, I.
Multi-parameter fracture mechanics is nowadays quite extensively applied when cracked\nstructures/specimens are investigated. The reason is that it has been shown that it can be\nhelpful and bring more accurate results when fracture processes happen in a larger\nregion around the crack tip, what can be typical for material like concrete or other\nmaterials with quasi-brittle behaviour. Various relative crack length configurations have\nbeen chosen in order to investigate the importance of the higher-order terms of the\nWilliams power expansion on the crack-tip stress field distribution in Wedge splitting\ntest specimen. The higher-order terms are calculated by means of the over-deterministic\nmethod from displacements of nodes around the crack tip obtained by a finite element\nanalysis in different radial distances from the crack tip. The effect of the constraint level\nis investigated. Although the third and higher terms of the Williams series are very often\nneglected, their influence on the opening stress values is investigated.
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Security Tool for wifi Network
Hala, Martin ; Henzl, Martin (referee) ; Kačic, Matej (advisor)
The main purpose of this tool is testing wireless networks security level for both personal and commercial use. It is based on latest knowledge about security of wireless networks. Key features are: portability - implemented on live linux distro, simple manipulation - well aranged GUI, testing - rich options of tests selection, security level evaluation - recommendations consequent on NIST standard.
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Optimization of the initial crack length in consideration of the groove width for wedge splitting test specimen
Seitl, Stanislav ; Klusák, Jan
An optimization of the initiate crack length in view of the width of grips groove of the wedge splitting (WS) specimen is the topic of the contribution. The WS specimens are now started to be used for fracture laboratory testing, especially of quasi-brittle cement-based composites. For the optimization the theory of the general fracture mechanics is used. For the numerical calculation the finite element method and ANSYS software are used. At the end, the optimal crack lengths for various grips widths are discussed and some suggestions are pronounced.
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Influence of vertical compresive force on level of constraint in cubical specimen for wedge splitting test
Seitl, Stanislav ; Klusák, Jan ; Dymáček, Petr ; Řoutil, L. ; Veselý, V.
The subject of the contribution is to gain new aspects of knowledge about the fracture behaviour of cementitious building materials by the wedge splitting test (WST). The particularly, the paper investigates the influence of the vertical compressive force Pv, that represents a reaction of the bottom support of the specimen, on the fracture parameters via tools of the two-parameter fracture mechanics. The effects of the vertical compressive force, Pv, on the plastic and fracture process zones are examined.
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