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    Wyświetlanie 1-12 z 12
    Tytuł:
    State of Strain and Development of Microstructure of 22MnB5 Steel and Al-Si Coating During Deep Drawing of Automotive B Pillar
    Autorzy:
    Paćko, Marek
    Krawczyk, Janusz
    Śleboda, Tomasz
    Frocisz, Łukasz
    Rumiński, Maciej
    Lypchanskyi, Oleksandr
    Tokarski, Tomasz
    Piasecki, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049736.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    B pillar
    22MnB5 steel
    aluminide coating
    deep drawing
    hot stamping
    Opis:
    The analysis of the development of the microstructure of deep drawn automotive B pillar, as well as the analysis of deformation based on numerical simulation and experiment, was performed. The microstructure of steel sheet as well as Al-Si coating after various stages of B pillar production was investigated. It was found that the obtained microstructure of the B pillar was significantly different from that described in many studies as a proper one. The microstructure of the investigated material consisted of martensite, bainite, and a small amount of ferrite. Al-Si coating, despite its morphological changes, remained on the surface of B pillar and, in spite of this, did not fully eliminate oxidation and decarburization of B pillar material. The analysis of the state of strain allowed to evaluate the deformation safety of the process, as well as to verify the simulation results through measurements of sheet thickness variations.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 2; 601-608
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    European mouflon [Ovis orientalis musimon Schreber, 1782] in the ecosystem of Lower Silesia
    Muflon europejski [Ovis orientalis musimon Schreber, 1782] w ekosystemie Dolnego Śląska
    Autorzy:
    Nowakowski, P.
    Chudoba, K.
    Piasecki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2197201.pdf
    Data publikacji:
    2009
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    European mouflon
    Ovis orientalis musimon
    ecosystem
    Lower Silesian region
    mouflon
    animal migration
    ram
    Źródło:
    Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica; 2009, 27, 4; 7-13
    0239-4243
    2083-7399
    Pojawia się w:
    Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A comparative study on the parasite fauna of perch, Perca fluviatilis L., collected from a freshwater coastal lake brackish-water Baltic Sea and the interconnecting canal
    Autorzy:
    Wierzbicka, J.
    Wierzbicki, K.
    Piasecki, W.
    Smietana, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/837913.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    parasite
    fish parasite
    fish
    perch
    fresh water
    Perca fluviatilis
    comparative analysis
    Baltic Sea
    coastal lake
    Lake Resko
    brackish water
    Źródło:
    Annals of Parasitology; 2005, 51, 4
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A comparative study on the parasite fauna of perch, Perca fluviatilis L., collected from a freshwater coastal lake brackish-water Baltic Sea and the interconnecting canal
    Autorzy:
    Wierzbicka, J.
    Wierzbicki, K.
    Piasecki, W.
    Śmietana, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2146417.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    parasite
    fish parasite
    fish
    perch
    fresh water
    Perca fluviatilis
    comparative analysis
    Baltic Sea
    coastal lake
    Lake Resko
    brackish water
    Opis:
    Background. Parasitological surveys of freshwater fishes rarely include comparisons between two ecologically different bodies of water. Such studies might help to understand processes of establishment of parasite faunas in estuary areas. The results obtained could also provide useful tools for discriminating various fish populations based on the composition of their parasite faunas. The present authors attempted to study such data from Resko Lake-a freshwater coastal lagoon (6 km? surface area), and the adjacent areas of the Baltic Sea. Resko Lake, located 12 km west of the city of Kołobrzeg, is shallow (1.5 m) and is connected to the sea through a small canal (1.3 km long, 30 m wide). Material and methods. The material was collected from April 1969 and July 1970. A total of 159 perch were collected, in this number 104 fish from the lake, 43 from the sea, and 12 from the canal. Results. A total of 32 parasite species were recovered from the fish necropsied. The parasites represented 7 higher taxa: Protozoa (3 species), Cestoda (4), Digenea (13), Nematoda (5), Acanthocephala (3), Mollusca (1), and Crustacea (3). The parasite fauna of perch from the sea was definitely more abundant (31 species) compared to that of the lake (21), and the canal (12 species). Infection parameters of 13 parasite species demonstrated significant differences between the locations studied. The infection level of 6 parasite species was significantly higher in perch from the sea: Bothriocephalus scorpii, Ligula sp., Brachyphallus crenatus, Camallanus truncatus, Hysterothylacium aduncum, and Echinorhynchus gadi. On the other hand, infection levels of 7 other species were higher at the lake: Triaenophorus nodulosus, Bucephalus polymorphus, Azygia lucii, Tylodelphys clavata, Camallanus lacustris, Acanthocephalus lucii, and Achtheres percarum. The infection parameters of the fish from canal were similar to those from the lake. Interesting observations were made on the seasonality of certain parasites of both lake- and Baltic perch. The presently observed differences between parasite faunas of the fish from ecologically different adjacent estuarine locations are certainly caused by diversified environmental conditions that affected the processes of formation of the parasite communities there. Among important factors that could affect compositions of the parasite faunas could have been: availability of the intermediate hosts, exchange of waters (Baltic water influxes to the lake), fish migrations (spawning), and finally the separate identity of the two fish stocks studied.
    Źródło:
    Wiadomości Parazytologiczne; 2005, 51, 4; 295-302
    0043-5163
    Pojawia się w:
    Wiadomości Parazytologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laser cladding by tru laser cell of SSAB BORON B27 STEEL applied in agriculture
    Napawanie laserem tru laser cell stali SSAB BORON B27 stosowanej w rolnictwie
    Autorzy:
    Kapcińska-Popowska, D.
    Gościański, M.
    Piasecki, M.
    Kamiński, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/334882.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
    Tematy:
    laser cladding
    microstructure
    microhardness
    SSAB BORON B27 steel
    napawanie laserowe
    mikrostruktura
    mikrotwardość
    stal SSAB BORON B27
    Opis:
    The article presents the effect of conventional heat treatment applied after overlaying welding with laser on properties of SSAB BORON B27 STEEL used in agriculture. In order to select the optimum parameters of laser processing and heat treatment for the best tribological properties of strength microhardness tests were carried out as well as observation of microstructures.
    W artykule przedstawiono wpływ konwencjonalnej obróbki cieplnej zastosowanej po napawaniu laserowym na właściwości stali SSAB BORON B27 stosowanej w rolnictwie. W celu wytypowania optymalnych parametrów obróbki laserowej i cieplnej dla uzyskania najlepszych właściwości tribologicznych i wytrzymałościowych przeprowadzono badania mikrotwardości oraz obserwację mikrostruktur.
    Źródło:
    Journal of Research and Applications in Agricultural Engineering; 2017, 62, 1; 74-77
    1642-686X
    2719-423X
    Pojawia się w:
    Journal of Research and Applications in Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Encapsulation of power electronics components for operation in harsh environments
    Autorzy:
    Stosur, M.
    Sowa, K.
    Piasecki, W.
    Płatek, R.
    Balcerek, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/141365.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    passive components
    encapsulation
    epoxy
    high pressure
    measurements
    harsh environments
    Opis:
    This paper reports on analyses and testing of sensitive power electronics components encapsulation concept, enabling operation in harsh, especially high pressure environments. The paper describes development of the concept of epoxy modules that can be used for protecting of the power electronics components against harsh environmental conditions. It covers modeling of the protective capsules using a simple analytical approach and Finite Element Method (FEM) models and validation of the developed models with the high pressure tests on samples fabricated. The analyses covered two types of the epoxy modules: of sphere- and elongated- shape, both with electrical penetrators that enable electrical connection of the encapsulated components with external power sources as well as other power modules and components. The tests were conducted in a pressure chamber, with a maximum applied pressure of 310 bars, for which online strain measurements have been conducted. The experimental results were compared with the simulation results obtained with analytical and FEM models, providing validation of the models employed. The experimental part of this work was conducted in collaboration with Polish Naval Academy in Gdynia.
    Źródło:
    Archives of Electrical Engineering; 2017, 66, 4; 855-866
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transient recovery voltage analysis for various current breaking mathematical models: shunt reactor and capacitor bank de-energization study
    Autorzy:
    Oramus, P.
    Chmielewski, T.
    Kuczek, T.
    Piasecki, W.
    Szewczyk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/140943.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    arc modelling
    overvoltages studies
    EMTP-ATP program
    transients analysis
    Opis:
    Electric arc is a complex phenomenon occurring during the current interruption process in the power system. Therefore performing digital simulations is often necessary to analyse transient conditions in power system during switching operations. This paper deals with the electric arc modelling and its implementation in simulation software for transient analyses during switching conditions in power system. Cassie, Cassie-Mayr as well as Schwarz-Avdonin equations describing the behaviour of the electric arc during the current interruption process have been implemented in EMTP-ATP simulation software and presented in this paper. The models developed have been used for transient simulations to analyse impact of the particular model and its parameters on Transient Recovery Voltage in different switching scenarios: during shunt reactor switching-off as well as during capacitor bank current switching-off. The selected simulation cases represent typical practical scenarios for inductive and capacitive currents breaking, respectively.
    Źródło:
    Archives of Electrical Engineering; 2015, 64, 3; 441-458
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of partial isomorphic substitution on electronic and optical parameters of ABSO₄ group crystals
    Autorzy:
    Shchepanskyi, P.
    Gaba, V.
    Stadnyk, V.
    Rudysh, M.
    Brezvin, R.
    Piasecki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1052706.pdf
    Data publikacji:
    2018-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.20.-b
    77.84.-s
    77.84.Bw
    Opis:
    First principles calculations of band energy, density of states and dielectric function of K_{1.75}(NH₄)_{0.25}SO₄ single crystals in Pnma structure is performed in the framework of density functional theory. In order to describe the exchange-correlation interaction the general gradient approximation and local density approximation are used. Character and genesis of main energy bands of the crystal are discussed and comparison with data set for K₂SO₄ isomorphic crystal performed. The influence of partial isomorphic substitution K→ NH₄ found itself mainly in altering the bottom of conduction band and decrease of band gap value. From the dielectric functions dependences, the refractive indices dispersion and absorption coefficient spectra are deduced. Obtained refractive indices satisfactorily agree with experimental data in the visible spectrum region.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 4; 819-823
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of calcination parameters on physicochemical and structural properties of co-precipitated magnesium silicate
    Autorzy:
    Ciesielczyk, F.
    Bartczak, P.
    Klapiszewski, L.
    Paukszta, D.
    Piasecki, A.
    Jesionowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/110710.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    magnesium silicate
    precipitation
    calcination
    WAXS
    porous structure
    Opis:
    Physicochemical properties of different oxide systems depend mostly on the method of their preparation and classification, so the main aim of the study was to obtain the MgO·SiO2 hybrid in an aqueous solution and its calcination under assumed conditions. Research scope included evaluation of the effect of the basic parameters of the calcination process (time and temperature) on the structural properties of the final materials. Products obtained by the proposed method were thoroughly characterized. The chemical composition, crystalline structure, morphology and nature of the dispersion as well as parameters of the porous structure were established. The results of research in a decisive manner confirmed the possibility of designing the properties of inorganic oxide systems such as MgO·SiO2, which will definitively scheduled into potential directions for their use.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2014, 50, 1; 119-129
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Specific Features of Content Dependences for Energy Gap in $In_{x}Tl_{1-x}I$ Solid State Crystalline Alloys
    Autorzy:
    Kashuba, A.
    Piasecki, M.
    Bovgyra, O.
    Stadnyk, V.
    Demchenko, P.
    Fedorchuk, A.
    Franiv, A.
    Andriyevsky, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398249.pdf
    Data publikacji:
    2018-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.20.Nr
    71.20.-b
    42.70.Gi
    71.35.-y
    Opis:
    A series of $In_{x}Tl_{1-x}I$ (x=0.4-0.9) single crystalline solid state alloys were successfully synthesized by the vertical Bridgman method. For the first time the density functional theory based band structure calculations are performed and features of the band energy dispersion are discussed. Comparison with the experimental energy gap $E_{g}$ obtained from the optical photoconductivity is discussed. An essential role of the localized defects and excitons in formation of the edge photoconductivity is analyzed. Relation between the crystal structure and photoconductivity of the materials studied is discussed. Also the origin of the principal valence and conduction bands is explored. Experimental measurements of the band gap $E_{g}$ by the optical and photoconductivity methods have given opposite dependences with respect to the indium content x. Features of the photoconductivity spectra for different crystallographic directions have been discussed with taking into account the chemical bonds anisotropy.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 1; 68-75
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impedance Sensors Made in PCB and LTCC Technologies for Monitoring Growth and Degradation of Pseudomonal Biofilm
    Autorzy:
    Chabowski, K.
    Junka, A. F.
    Piasecki, T.
    Nowak, D.
    Nitsch, K.
    Smutnicka, D.
    Bartoszewicz, M.
    Moczała, M.
    Szymczyk, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/221326.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Pseudomonas aeruginosa
    biofilm
    interdigitated sensor
    impedance spectroscopy
    Opis:
    The suitability of low-cost impedance sensors for microbiological purposes and biofilm growth monitoring was evaluated. The sensors with interdigitated electrodes were fabricated in PCB and LTCC technologies. The electrodes were golden (LTCC) or gold-plated (PCB) to provide surface stability. The sensors were used for monitoring growth and degradation of the reference ATCC 15442 Pseudomonas aeruginosa strain biofilm in invitro setting. During the experiment, the impedance spectra of the sensors were measured and analysed using electrical equivalent circuit (EEC) modelling. Additionally, the process of adhesion and growth of bacteria on a sensor’s surface was assessed by means of the optical and SEM microscopy. EEC and SEM microscopic analysis revealed that the gold layer on copper electrodes was not tight, making the PCB sensors susceptible to corrosion while the LTCC sensors had good surface stability. It turned out that the LTCC sensors are suitable for monitoring pseudomonal biofilm and the PCB sensors are good detectors of ongoing stages of biofilm formation.
    Źródło:
    Metrology and Measurement Systems; 2017, 24, 2; 369-380
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hydroxyapatite as a support in protease immobilization process
    Autorzy:
    Zdarta, J.
    Budzinska, K.
    Kolodziejczak-Radzimska, A.
    Klapiszewski, Ł.
    Siwinska-Stefanska, K.
    Bartczak, P.
    Piasecki, A.
    Maciejewski, H.
    Jesionowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/110452.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    hydroxyapatite
    enzyme immobilization
    protease
    physicochemical characteristic
    Opis:
    Hydroxyapatite is used as a matrix for immobilization of protease from Aspergillus oryzae by a process of adsorption. The matrix obtained has the surface area of 26 m2/g and particles in the shape of flakes of diameters no greater than 650 nm. The efficiency of the proposed method was confirmed by the Fourier transform infrared spectroscopy, elemental analysis and by analysis of parameters of the pore structure of matrix and products after immobilization. On the basis of the Bradford method it was found that the greatest amount of enzyme (132 mg/g) was immobilized from a solution of initial enzyme concentration of 7 mg/cm3 after 24 h of the process.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2015, 51, 2; 633-646
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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