No abstract

Abstract. This paper presents a simulation of the casting solidification process performed on graphics processors compatible with nVidia CUDA architecture. Indispensable for the parallel implementation of a computer simulation of the solidification process, it was necessary to modify the numerical model. The new approach shown in this paper allows the process of matrix building to be divided into two independent phases. The first is independent from the nodal temperature values computed in successive time-steps. The second is performed on the basis of nodal temperature values, but does not require a description of the finite element mesh. This phase is performed in each time step of the simulation of the casting solidification process. The separation of these two phases permits an effective implementation of the simulation software of the casting solidification process on the nVidia CUDA architecture or any other multi-/manycore architecture. The use of GPUs nVidia for the implementation of a computer simulation of the solidification process significantly reduced the waiting time for results. In the course of computer simulations important speedup of the computations was observed.Keywords: numerical modeling, solidification, distributed and parallel processing, CUDA General informationProblems faced by engineers and scientists often require carry out the complicated and time-consuming computer simulations, on the basis of which changes can be incorporated into the analyzed object (its geometric model). Such tasks require the most modern solutions in the field of computer science, the most popular solution is parallel processing. Over the last few years the dynamic development of multicore processors has had a direct impact on the availability of advanced high performance solutions for scientists and engineers. Graphic processors (GPUsGraphics Processing Unit) are increasingly being used in high performance computations. A single GPU has a theoretical computational power several times higher than the fastest available CPU. Figure 1 shows the increase in the theoretical computational power of graphic processors and general purpose processors since 2003.

After Poland regained independence in 1918, educational societies played an important role in the education of the society. Jan Kornecki was one of many community workers who continued activities in that area started during the times of national bondage. On behalf of the Polish Educational Society in Warsaw [Polska Macierz Szkolna], he became a member of a pioneer group trying to unify the actions and strengthen the cooperation between educational societies in various districts of Poland. After the establishment of the Liaison Commission of Polish Educational Societies [Komisja Porozumiewawcza Polskich Towarzystw Oświatowych], he accepted the position of the secretary of the Commission’s Executive Department and was responsible for initiating and maintaining permanent contacts between the societies forming the Commission. Apart from maintaining ongoing relationships with community workers in the places of their local activities, he prepared the First Polish Educational Congress, which was convened in December 1924 in Warsaw. J. Kornecki rendered great services in founding a new educational organization named The Union of Polish Educational Societies [Zjednoczenie Polskich Towarzystw Oświatowych], which was established in 1927 based on the experiences gathered by the Liaison Commission, which operated earlieroku He took the function of the manager of the Union’s Executive Department Office; his responsibilities included delegating and supervising tasks performed by clerks employed in the Office, managing the property and funds, and drawing up reports of activities. He moreover organized and convened annual and extraordinary meetings of delegates and implemented the resolutions adopted, prepared plans and programmes of quarterly off-schedule meetings of the Executive Department, represented the Union during external relations, mainly with state and local government institutions and first of all initiated and maintained regular relationships with separate associations and provided them with all kinds of aid, e.g. by organizing annual conferences for educational managers.

Autor w swoim artykule, zgłębiając zawartość czasopisma „Ku Szczytom” wydawanego przez Katolicki Związek Wychowawczy w Wilnie w międzywojniu, wyodrębnił i omówił podnoszone na jego łamach zagadnienia teologiczne, psychologiczne i pedagogiczne.

In the context of reflections on the breakthrough moments in the history of Poland in the first half of the 20th century, the content of the volume of the journal “Nauki o Wychowaniu. Studia Interdyscyplinarne” (Nowis. Interdisciplinary Studies) which testifies to the preservation of their historical memory, is discussed.