This paper presents a conceptual study aiming to improve the compactness of electro-hydraulic compact drives (ECD ). In most current ECD architectures, gas accumulators are used as volume compensators for the flow imbalance emerging whenever asymmetric single rod cylinders are used. To stay within a required reservoir pressure range typically from two to four bar, a large gas volume is required, compromising system compactness. Combining conventional ECD architectures with a bootstrap reservoir offers a greater degree of freedom in system design, which enables downsizing or avoidance of the gas volume. Another potential benefit by including a bootstrap reservoir is the possibility of elevating the backpressure of the ECD thus enhancing drive stiffness, expanding the application range and market acceptance. Based on an open analysis of the solution space occurring when introducing a bootstrap reservoir, three system architectures are selected for a conceptual study. The results show that the downsizing potential is strongly dependent on the maximum friction force and the area ratio of the bootstrap reservoir pistons, while a linear analysis reveals that for some system architectures the bootstrap reservoir may severely influence the system dynamics. Simulation results confirm the functionality of the proposed system architectures, and show that a potential for downsizing/avoiding the gas volume, as well as increasing the ECD stiffness is present.

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On étudie la conjecture des graphes jumeaux dénombrables, cas spécifique d’une conjecture de Thomassé, qui dit que le nombre de jumeaux d’un graphe dénombrable ( ses sous-graphes propres desquels il est aussi un sous-graphe propre) est soit nul, soit infini. On commence par étudier les graphes auto-abrités, que nous définissons, et en utilisant notre classification de ces graphes nous prouvons la conjecture dans certains cas, en précisant la cardinalité exacte du nombre de jumeaux. Nous donnons également des contre-exemples à l’article de l’arXiv «Self-contained graphs». / We make progress on the Graph Alternative Conjecture, a special case of a conjecture of Thomassé which says that the number of twins of a countable graph (i.e. its proper subgraphs of which that graph is also a proper subgraph) is either null or infinite. We begin by studying self-embedded graphs, which we define, and using our classification of these graphs, we prove the conjecture in some cases while specifying the exact number of twins. We also give counter-examples to a paper on arXiv called "Self-contained graphs".

ABSTRACT Model housing like a part of self-contained rehabilitation of children with combinated handicap In my thesis I deal with the following subject: Model housing like a part of self-contained rehabilitation of children with combinated handicap. The model housing is totally new project which Children´s Centre ARPIDA in České Budějovice ( hereinafter {\clqq} DC ARPIDA ``) took up as part of its services.The project has been running for two years and its implementation is realized in the second grade of vocational tranining school of DC ARPIDA in the building of The model protected housing. The aim of the project is to teach children with physical and combined handicap predefined activities.These predefined model activities should enlarge their independence from other persons and increase the extent of their self-sufficiency in common and extended daily activities connected with housing. The model protected housing is designed for children who attend the two-year vocational tranining school in DC ARPIDA where they go through three month´s course of the model protected housing.At the beginning of the course the children go through ergo-therapeutical examination to determine the rate of their independence and self-sufficiency. After finishing the course they are reviewed to find out whether they have improved their results and how they have profited from passing through the course. The main goal of my thesis is to investigate whether The model protected housing contributes to the increasing of the client´s level of seff-sufficiency and why it has a great importance in the system of education and physiotherapy. Another goal which should be followed is to show how the children´s parents see the project as a whole, whether they want their children to take part in this project, if they support the idea of a separate living and how they want their children to live in the future. I used the questionnaire method and the secondary data analysis to verify the given hypotheses. The interviewed group was made up of the parents of children clients of DC ARPIDA. My main aim was to investigate how much they are informed about the possibilities of integration of their children to the society, in what ways the parents are able to support them, their willingness to assist in this proccess and what is their idea of their children´s future life.The proccess of integration is not only the result of school classes or experts´ and school staff´s effort but first of all it is the parents who are supposed to be the most important link in the proccess of integration . Their position in the proccess of successful integration is irreplaceable. The input and output physiotherapy results were used for the secondary analysis. On the basis of data obtained from this analysis it is possible to claim that the model activities which the children performed in the model protected housing help to increase the rate of independance from an other person and of everyday self-sufficiency. With respect to explicit results of the research it is possible to draw the conclusion that in all cases the course of model protected housing increases the function rate of self-sufficiency and independence from the others in the model activities. Thereby the basis hypothesis has been clearly confirmed.