ORIGINAL_ARTICLETeaching Language Theory and Automata (LTaA) in such a way that students are highly motivated to actively learn is quite a challenging task. This paper presents a pedagogical approach that connects suitable parts of these rather abstract topics with some applications in automated compiler construction, i.e. compiler generation. To get this approach implemented in a real class situation we have developed an appropriate learning environment, called AtoCC. To illustrate how AtoCC can be used to support teaching as well as learning, an extensive exercise on compiler generation, which the authors lecture on, is presented.https://acc-ern.tul.cz/archiv/PDF/ACC_2009_1_01.pdf2009-06-30614HielscherMichael1AUTHORChristianWagenknecht2AUTHOR

ORIGINAL_ARTICLEThe job shop scheduling problem is a well known NP-hard optimization problem. There are a lot of optimization techniques to optimize theoretical problems. It is necessary to use additional constraints to optimize real world cases. This paper presents job shop scheduling in the multi-shift work system environment. Firstly, there is presented a modification of Giffler and Thompson (GT) Constructive Algorithm (CA). Then the above mentioned modification is tested on a well known theoretical problem by CA, Local Search (LS) and Genetic Algorithm (GA). The contribution also focuses on the time span of these methods.https://acc-ern.tul.cz/archiv/PDF/ACC_2009_1_02.pdf2009-06-301523FrantišekKoblasa1AUTHORFrantišekManlig2AUTHOR

ORIGINAL_ARTICLEThe paper deals with a new type ductile iron. Casting irons are most widely used construction materials all over the world. Our main aim was to look for a constructional material that would have the mechanical properties and homogenous structure homogenous in different wall castings. We believe that ferritic ductile iron grade 400-15 with a tensile Rm  400 MPa meets the requirements. This material has a better machinability when compared to conventional grades. In spite of some disadvantages, e.g. lower strength yield good tensile, other characteristics as low costs of production or very good casting properties demand using of this sort of material. At our Department of Mechanical Engineering at the Technical University of Liberec, we deal with metallurgical preparation, structure and mechanical properties of a new type of ductile iron.https://acc-ern.tul.cz/archiv/PDF/ACC_2009_1_03.pdf2009-06-302429IvaNová1AUTHORIvaNováková2AUTHORJiříMachuta3AUTHOR

ORIGINAL_ARTICLEThe paper deals with current problems of signal processing during measurement of nonstationary mechanical processes. A special case of them are shocks which impose demanding requirements on the measuring equipment as well as on processing methods of measured data heavily. Usually, acceleration is measured by acceleration transducers. If these data are integrated consequently, the time behavior of velocity or displacement will be acquired. During mechanical shocks the measured signal includes spurious components which belong to damped natural oscillations of the measured object surface and transducer as well. In the article there are mentioned concrete examples of the measured data and their evaluation of signal processing methods which are based on mathematical and mechanical filtering of high-frequency vibration components.https://acc-ern.tul.cz/archiv/PDF/ACC_2009_1_04.pdf2009-06-303035LubomírPešík1AUTHORMartinVančura2AUTHOR

ORIGINAL_ARTICLEIn the following article the optimization of operating control is described as a method for the effective realization of energy management with complex heating systems. Firstly, the conditions for the optimization of conventional heating systems will be explained. Then the complexity of the optimization of complex heating systems is highlighted. This is related to the number of border limitations. The use of automation control is presented as a way for the implementation of energy managementhttps://acc-ern.tul.cz/archiv/PDF/ACC_2009_1_05.pdf2009-06-303641PatriciaStange1AUTHOR

ORIGINAL_ARTICLENowadays there is a great pressure on production systems design to be done in a short time and more effectively. Moreover, it must support the systems’ flexibility, modularity and robustness. For these purposes several software tools have been used– mainly for project analysis, design and validation. Nevertheless, these tools have been used with a low integration level, including the absence of data coherence. This paper deals with production systems’ design, actually concerning the integration of particular software tools into a unified system. This work identifies different tools, describing their functions and principles of integration. It also addresses the way this integration enabled the automatic generation of simulation programs. Furthermore, it finally discusses ways of making this integration contributing to the automatic generation of different patterns of project layouts.https://acc-ern.tul.cz/archiv/PDF/ACC_2009_1_06.pdf2009-06-304250PavelVik1AUTHORLuisDias2AUTHORGuilhermePereira3AUTHOR

ORIGINAL_ARTICLEThis paper deals with an illustration of the finite element method (FEM) application to the optimization of the preloading screw connection. The screw connection between the stationary engine housing cap and a cylinder is analyzed. In the first stage the problem was mapped, and the current state was computed while using FEM. By using the classic theory of the pre-tensioned screw connection, an optimum form of the connection was designed. This variation was controlled by FEM, and the results were compared with the previous state. This paper shows in detail an effective approach to optimization of the screw connection where a combination of knowledge of the classic theory and usage of modern computational method is applied.https://acc-ern.tul.cz/archiv/PDF/ACC_2009_1_07.pdf2009-06-305157JiříŽák1AUTHORJiříHauptvogel2AUTHOR