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An evaluation of constitutive models to predict the behaviour of finegrained soils with different degrees of overconsolidation
Hájek, Václav
Advanced constitutive models incorporate void ratio as a state variable. Advantage of these models is the possibility to use a single set of material parameters for modelling of soils with different degrees of overconsolidation. Experiments and model predictions were compared to find the range of application of a single set of material parameters for soils with different degrees of overconsolidation. First model predictions were compared with a set of experiments on kaolin clay (Hattab a Hicher, 2004) and than with a set of experiments on tertiary clay performed in laboratory of soils mechanics at Charles University as a part of this thesis. The models were evaluated by comparison of stress-strain curves and by one skalar measure of the prediction error. It is demonstrated that at least two sets of material parameters are required for all three models. A Hypoplastic model for clays leads to better predictions than the elasto-plastic Three surface kinematic hardening model. The worst predictions gives the Modified Cam Clay model.
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Becoming Different as a Search for a Departure Point in the Texts of Franz Kafka. A Report for a Ceratin Academy
Buberlová, Lenka ; Fulka, Josef (advisor) ; Hájek, Václav (referee)
Na první pohled by se mohlo zdát, že Kafkův svět je světem sice podivným a křivolakým, ale přesto pevně ohraničeným, jasně vymezeným teritoriem, které je prodchnuto přísně definovanými, ač mnohdy neznámými pravidly, a v němž dochází k svízelným situacím, z nichž se nelze vymanit. Není tomu tak zcela.
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Horizons and ruins. The visible and invisible in the early modern visual culture
Hájek, Václav ; Konečný, Lubomír (advisor) ; Wittlich, Petr (referee) ; Lahoda, Vojtěch (referee)
My thesis deals with one specific pictorial motif from nineteenth century (horizon contra ruin) which represents and brings questions into an early modern visual culture. The visual culture includes a set of representations (artefacts, mass images, visual signs etc.) and also methods of a visual perception and reception. This text has an objective to watch, how is a concrete historical variant of the visual culture by reflexive manner reflected and construed in visual artefacts themselves (in a relevant theoretical context).
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