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    Wyświetlanie 1-7 z 7
    Tytuł:
    The system of active bases protection in the areas of combat tasks
    Autorzy:
    Sprawka, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/244427.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    anti-personnel mine alternatives
    remote-controlled minefields
    non - lethal weapon
    Opis:
    Due to the ratification of the Ottawa Convention, Poland is obliged to dispose of the arsenal of anti-personnel mines. The work on the modernization of the existing mines, which is underway, focuses on the replacement of their fuses with controlled elements, which will soon make it possible to exclude this type of munitions from being defined as anti-personnel mines. The ongoing degradation of currently possessed stockpiles, a ban on production and purchase of this type of munitions as well as cutbacks in funds for purchasing military equipment for the Polish Armed Forces, all mean the necessity of introducing an alternative with the aim of replacing previously used anti-personnel and anti-tank mines - an alternative which will be characterized by economical production process and, at the same time, by effectiveness sufficient to ensure that the minimum quantity thereof will allow the performance of combat tasks at the same, or even higher, level. This paper describes issues connected to the worldwide tendency to eliminate the arsenal of anti-personnel land mines and to replace them with their alternatives, which are to be applied in the protection system of a designated area. The paper defines requirements to be met by an alternative and presents a concept of such a device, constructed on the basis of the design of a warhead that may have installed in it non-lethal weapons' components.
    Źródło:
    Journal of KONES; 2011, 18, 1; 603-608
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza dynamiki wsadu podczas topienia indukcyjnego w warunkach lewitacji
    Stability analysis of dynamic charge in levitational melting processes
    Autorzy:
    Ostrowski, P.
    Sprawka, P.
    Krysowaty, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/251840.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Naukowo-Wydawniczy TTS
    Tematy:
    wzbudnik
    indukcyjne topnienie lewitacyjne
    metal
    stop metalu
    inductor
    melting levitation
    metal alloy
    Opis:
    Artykuł porusza aspekty indukcyjnego topnienia lewitacyjnego metali i stopów w warunkach wysokiej czystości. Autorzy wskazują na zagadnienia zapewnienia stabilności dynamicznej wsadu wewnątrz wzbudnika w obecności zakłóceń sieci oraz na etapie załadunku wsadu. Podjęte rozważania są niezwykle istotne w procesie projektowania konstrukcji wzbudnika, by zapewnić wystarczający zapas stabilności dynamicznej w praktycznym wykorzystaniu tegoż wzbudnika.
    The article introduces analysis of the dynamic stability of charge in levitational melting regarding many kinds of disturbance during process. The mathematical model of the dynamics was introduced, numeric computational algorithm enabling the mathematical analysis of movement of the charge inside inductor was passed
    Źródło:
    TTS Technika Transportu Szynowego; 2016, 12; 479-483
    1232-3829
    2543-5728
    Pojawia się w:
    TTS Technika Transportu Szynowego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The modelling of transfer influence vehicle from ground surface on objects in placed
    Modelowanie oddziaływania pojazdu na minę umieszczoną w gruncie
    Autorzy:
    Kuczmarski, F.
    Bartnicki, A.
    Sprawka, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/241655.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    miny
    grunt
    oddziaływanie dynamiczne i statyczne
    modelowanie
    mines
    soil
    static and dynamic loads
    modelling
    Opis:
    This paper describes the initial model of the load-mine-ground relation and presents the preliminary results of a computer simulation. Pressure mine-clearing devices, with discs loosely embedded on the axis of the minesweeping section, (disc mine-clearing devices) cause deformation to the mine 's firing mechanism, which, through the actuation of the fuse, leads to the detonation of the inner-placed explosive. It is assumed that under the load of a mine clearing vehicle, the active part of the mine's cover will be vertically displaced by 6-10 [mm] actuating the fuse of the mine. Although the construction parameters of pressure mine-clearing devices are known, there is a shortage of instructions and data requisite for proper construction and effectiveness examination of dynamic mine-clearing vehicles. In fact, during mine clearing with a dynamic mine-clearing device, the force exerted upon the mine (Ngr) is that of the pressure by the disc (an element of the device). This force differs from a static load and the differences result from the following factors: mine placement type of soil as well as its physical and mechanical properties construction properties of a mine-clearing device pace of mine clearing The issue of influence transferred from the surface of the ground onto the mine placed inside is not present in literature and it constitutes an interesting and important scientific issue in terms of selecting parameters for dynamic minesweeping devices. Similarly to a static load, shock waves propagating within the ground cause its volumetric and structural deformations. The main cause of the differences lies in the briefness of a dynamic load. The gradual growth of static loads (clenching) causes displacement of air and water in the pores and their partial squeezing out. In the case of a static load applied to sandy soils, the process lasts from a few minutes to a few hours, whereas in the case of clay and loessial ones, it extends to a few days, weeks or, sometimes, even months. Under static and dynamic loads, the ground reacts similarly to a three-component centre with a changing-with-time amount of air and water. The action time of a percussive load extends from a few to between ten and twenty milliseconds. Due to air and water inertia, this is too short a period of time to squeeze them out of the pores of the soil, which reacts in a way similar to a three-component centre with a constant amount of air and water. Since in unhydrated soils the main part of the pores' volume consists of air, both static and dynamic loads are accompanied by the absorption of the main stresses by the skeleton. With static loads exerted upon the hydrated soil, both water and air flow loosely out of the pores without the absorption of the loads. In terms of strength the only working element here is the ground's skeleton. In the case of short-lasting, intense loads, water (with a small amount of trapped air) will not flow out simultaneously with the skeleton and, as in the case of mean pressures, it may absorb the load to a larger extent than the skeleton itself. The way the hydrated ground reacts to low pressures - below 1 MPa - is therefore largely determined by the amount of air in the pores. Therefore, the ground with a mine placed inside is a multiphase center with changeable properties - the semi-limited area with mechanical properties changing with each cycle of dynamic influence put upon its surface. Although the issue of the ground pressure measurement is dealt with in various publications, there is a lack of data concerning how it changes under the mechanical influence of moving vehicles and under that of dynamic minesweeping devices - the problem which is essential for a safe minefield crossing. The effectiveness of percussive minesweeping devices can be evaluated upon the basis of the experimental data obtained by means of measuring equipment. The elaboration of a reliable ground-mine relation model for short-time (percussive) influences transferred to the ground surface should accelerate the process of selecting parameters for dynamic mine clearing in terms of obtaining the maximum destructive impact, either directly upon the mine or through the actuation of its firing mechanisms for various types of mines, different depths at which they are buried as well as for various soils with their different properties. The above task is the aim of further works focusing on the subject presented in this paper.
    Źródło:
    Journal of KONES; 2007, 14, 1; 245-253
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metody optymalizacji wydajności silnika Unity 3D w oparciu o grę z widokiem perspektywy trzeciej osoby
    Methods for optimizing the performance of Unity 3D game engine based on third-person perspective game
    Autorzy:
    Siarkowski, K.
    Sprawka, P.
    Plechawska-Wójcik, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/98316.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Lubelska. Instytut Informatyki
    Tematy:
    optymalizacja
    silniki gier
    Unity
    optimization
    game engines
    Opis:
    Optymalizacja gier to jeden z najważniejszych aspektów ich tworzenia. Artykuł opisuje metody optymalizacji silnika Unity, a jako przedmiot analizy posłużyła gra z widokiem perspektywy trzeciej osoby. Zbadano jaki wpływ na wydajność gry mają metody, które polegają na odciążeniu karty graficznej, poprzez zwiększenie wykorzystania procesora oraz pamięci.
    Game optimization is one of the most important aspects of their creation. The article describes methods to optimize Unity Engine using third person perspective game as an example. Various methods that rely on offloading graphics card, by increasing the use of CPU and memory were used in order to check how the game performance changes.
    Źródło:
    Journal of Computer Sciences Institute; 2017, 3; 46-53
    2544-0764
    Pojawia się w:
    Journal of Computer Sciences Institute
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chlorophyll Content of Aphid-Infested Seedling Leaves of Fifteen Maize Genotypes
    Autorzy:
    Sytykiewicz, H.
    Czerniewicz, P.
    Sprawka, I.
    Krzyzanowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/19588.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Źródło:
    Acta Biologica Cracoviensia. Series Botanica; 2013, 55, 2
    0001-5296
    Pojawia się w:
    Acta Biologica Cracoviensia. Series Botanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Molecular screening for Bartonella henselae and Borrelia burgdorferi sensu lato co-existence within Ixodes ricinus populations in central and eastern parts of Poland
    Autorzy:
    Sytykiewicz, H.
    Karbowiak, G.
    Werszko, J.
    Czerniewicz, P.
    Sprawka, I.
    Mitrus, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/50132.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Medycyny Wsi
    Opis:
    The presented study aimed at establishing the prevalence and co-infection rates of Bartonella henselae and Borrelia burgdorferi sensu lato in Ixodes ricinus ticks collected from the central and eastern parts of Poland. The common tick individuals were gathered in the years 2008-2009. Questing ticks were sampled by dragging a white woollen flag over lower vegetation at 17 localities within diverse types of habitats: urban recreational green areas (city parks and squares), suburban forests and rural woodlands throughout the investigated regions of Poland. Detection of B. henselae in tested tick specimens was based on PCR amplification of the citrate synthase (gltA) gene, while screening for the presence of B. burgdorferi s.l. DNA was carried out by analyzing fragments of two genes: the flagellin (fla) and outer surface protein A (ospA). A total number of 1,571 I. ricinus ticks were sampled: 865 (55.1%) nymphs, 377 females (24.0%) and 329 males (20.9%). The application of PCR assays revealed that 76 (4.8%) tick samples were B. henselae-positive, B. burgdorferi s.l. DNA was detected in 194 specimens (12.3%), whereas the co-existence of these pathogens was evidenced in 22 tested ticks (1.4%). Furthermore, the occurrence of bartonellae and co-circulation of analysed microorganisms in I. ricinus was affirmed only within adult individuals, while presence of the screened spirochetes was ascertained in both nymphal and adult ticks. It should be stressed that the suburban woods of Warsaw and rural forests in Warsaw County characterized the highest prevalence levels of dual infection with investigated tick-borne pathogens, whereas the lowest co-infection rates were recorded in tick populations inhabiting rural forests in Płock County and forested areas in Korczew-Mogielnica (within the Nadbużański Landscape Park).
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2012, 19, 3
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Molecular evidence of Anaplasma phagocytophilum and Babesia microti co-infections in Ixodes ricinus ticks in central-eastern region of Poland
    Autorzy:
    Sytykiewicz, H.
    Karbowiak, G.
    Hapunik, J.
    Szpechcinski, A.
    Supergan-Marwicz, M.
    Golawska, S.
    Sprawka, I.
    Czerniewicz, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/50011.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Medycyny Wsi
    Opis:
    The aim of the study was to elucidate the distribution of Anaplasma phagocytophilum and Babesia microti co-infection in Ixodes ricinus populations within the central-eastern region of Poland. The prevalence of analysed tick-borne human pathogens in single and polymicrobial infections in I. ricinus ticks were analysed using the conventional and nested PCR techniques. A total number of 1,123 questing tick individuals (291 females, 267 males and 565 nymphs) were collected at different ecosystems (municipal parks, suburban forests, and woodlands). In the presented study, 95 samples of ticks (8.5%) were infected with A. phagocytophilum, 3.1% (n=35) with B. microti, whereas the co-existence status of these human pathogens was detected in 1.8% (n=20) of all tested samples. It has been demonstrated that the prevalence of co-infection status was the highest among females of I. ricinus (11 samples, 3.8%), whereas the lowest within tested nymphs (5 samples, 0.9%). Ticks collected at city parks in Warsaw and suburban areas of this town characterized the highest prevalence of co-infections (3.3 and 4.8%, respectively). Furthermore, it was established that co-infection rates of ticks inhabiting woodlands within Kampinos National Park and Nadbużański Landscape Park were similar and reached the levels of 1.4% (n=5) and 1.1% (n=4), respectively.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2012, 19, 1
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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