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    Wyświetlanie 1-9 z 9
    Tytuł:
    The Development of Rapidly Solidified Magnesium – Copper Ribbons
    Autorzy:
    Pastuszak, M.
    Cieślak, G.
    Dobkowska, A.
    Mizera, J.
    Kurzydłowski, K. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/958209.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    magnesium-based alloys
    rapid solidification
    microstructure
    mechanical properties
    corrosion properties
    Opis:
    The aim of the present work was to plan and carry out an experiment consisting of amorphization of industrial magnesium alloy WE 43 (Mg - 4 Y - 3 RE - 0.5 Zr) modified by the copper addition. Investigated alloy modified with 20% of copper was rapidly quenched with the use of melt spinning technique. The effects of cooling rate on the structure and properties of the obtained material were extensively analyzed. The structure and phase analysis of samples were examined using X-ray diffraction method (XRD) while the thermal stability of the samples was determined by differential scanning calorimetry (DSC). Microstructure observations were also conducted. The microhardness tests (HV0.02) and corrosion resistance tests were carried out to investigate the properties of the material. Corrosion resistance measurements were held using a typical three-electrode system. As the result of the research, the effect of cooling rate on microstructure and properties of investigated alloy was determined.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 2B; 1083-1088
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Somatotype variables related to strength and power output in male basketball players
    Autorzy:
    Buśko, K.
    Pastuszak, A.
    Lipińska, M.
    Gryko, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/306234.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    mężczyzna
    koszykówka
    somatotyp
    siła
    skok
    male
    basketball
    Somatotype
    strength
    power
    vertical jump
    Opis:
    The purpose of this study was to investigate the relationship between somatotype, muscular strength, power output measured in maximal cycle ergometer exercise bouts, and maximal power output and height of rise of the body mass centre (jump height) measured in akimbo counter movement jump (ACMJ), counter movement jump (CMJ) and spike jump (SPJ), in male basketball players. Methods: Thirteen male basketball players (second division, age 19.4±0.8 years, body height 192.9±5.6 cm, body mass 88.8±8.6 kg, training experience 9.3±0.8 years) participated in the study. Somatotype was determined using the Heath-Carter method. Maximal joint torques were measured under static conditions. Power output was measured in 2 maximal cycle ergometer exercise bouts, 10 s each, with increasing external loads equal to 7.5 and 10.0% of the body weight (BW). All jump trials (ACMJ, CMJ and SPJ) were performed on a force plate. Results: The mean somatotype of basketball players amounted to: 2.8-4.2-3.2. Sum of the joint torques for left and right lower extremities (0.613), trunk (0.631) and all six measured muscle groups (0.647) were significantly correlated (p<0.05) with mesomorphy and ectomorphy. Conclusion: It can be assumed that basketball players’ anthropometric characteristics can influence their level of performance but it is not a decisive factor.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2017, 19, 2; 161-167
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Somatotype : variables related to muscle torque and power output in female volleyball players
    Autorzy:
    Buśko, K.
    Lewandowska, J.
    Lipińska, M.
    Michalski, R.
    Pastuszak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/307269.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    female
    volleyball players
    somatotype
    strength
    power
    jump
    wytrzymałość
    energia
    skok
    Opis:
    The purpose of this study was to investigate the relationship between somatotype, muscle torque, maximal power output and height of rise of the body mass centre measured in akimbo counter movement jump (ACMJ), counter movement jump (CMJ) and spike jump (SPJ), and power output measured in maximal cycle ergometer exercise bouts in female volleyball players. Fourteen players participated in the study. Somatotype was determined using the Heath–Carter method. Maximal muscle torque was measured under static conditions. Power output was measured in 5 maximal cycle ergometer exercise bouts, 10 s each, at increasing external loads equal to 2.5, 5.0, 7.5, 10.0 and 12.5% of body weight (BW). All jump trials (ACMJ, SPJ and CMJ) were performed on a force plate. The mean somatotype of volleyball players was: 4.9-3.5-2.5. The value of the sum of muscle torque of the left upper extremities was significantly correlated only with mesomorphic component. Mesomorphic and ectomorphic components correlated significantly with values of maximal power measured during ACMJ and CMJ. Power output measured in maximal cycle ergometer exercise bouts at increasing external loads equal to 2.5, 5.0 and 7.5% of BW was significantly correlated with endomorphy, mesomorphy and ectomorphy.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2013, 15, 2; 119-126
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Poduszkowiec sterowany z systemu android
    A hovercraft controlled from Android system
    Autorzy:
    Filipek, P.
    Kamiński, T.
    Panas, P.
    Pastuszak, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/312555.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    poduszkowiec
    układ sterowania
    system android
    hovercraft
    control system
    android system
    Opis:
    W artykule przedstawiono projekt pojazdu poduszkowego oraz rzeczywiste wykonanie modelu i układu sterowania przy użyciu ogólnodostępnych części oraz materiałów. Pojazd składa się z dwóch systemów napędowych, jeden służy do wytwarzania ciśnienia wewnątrz poduszki powietrznej, która kieruje powietrze pod kadłub poduszkowca i jednocześnie unosi pojazd nad podłożem. Drugi system służy do wprawiania pojazdu w ruch postępowy oraz zmiany kierunku ruchu. Sterowanie pojazdem odbywa się za pomocą urządzenia mobilnego z systemem Android połączonego bezprzewodowo z mikrokontrolerem Arduino.
    Paper shows the design of air-cushion vehicle and the actual implementation of the model and control system using generally accessible parts and materials. The vehicle consists of two main systems, The lift system producing pressure inside the air cushion which directs air under the hull of the hovercraft and at the same time raises the vehicle above the ground. The second system propels the craft forward and change the direction of movement. Control system is done by using Android smartphone connected wirelessly to the Arduino microcontroller.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 6; 663-667, CD
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metody zwiększenia efektywności transportu towarowego w obrębie aglomeracji szczecińskiej
    Methods for increasing the efficiency of freight transport in Szczecin area
    Autorzy:
    Kujawski, A.
    Pastuszak, K.
    Kacprzak, K.
    Franos, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/309888.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    aglomeracja szczecińska
    transport drogowy
    transport kolejowy
    koszty transportu
    efektywność transportu
    Szczecin agglomeration
    road transport
    railway transport
    transportation costs
    transport efficiency
    Opis:
    W artykule omówione zostały problemy transportowe w obrębie aglomeracji szczecińskiej. Dokonano analizy stanu istniejącego oraz zaproponowano rozwiązania problemów transportu towarowego na przykładzie istniejącej sieci logistycznej. Proponowana metoda polega na odciążeniu transportu drogowego przy wykorzystaniu istniejącej infrastruktury transportu kolejowego, a także przeanalizowanie jaki będzie to miało wpływ na koszty bezpośrednie oraz koszty zewnętrzne dla tych dwóch gałęzi transportu. W analizie wykorzystano metodę najkrótszej ścieżki do rozwiązania problemu komiwojażera. Metoda ta rozwiązuje graf hamiltonowski w poszukiwaniu minimalnej odległości pomiędzy wszystkimi badanymi punktami i wyznacza najkrótszą ścieżkę pomiędzy nimi.
    The article presents transport problems within the Szczecin area and analysis of the existing situation. The main goal is to propose solutions of the freight transport using the existing logistics network. The aim is to relieve part of road transport and move it to the rail using existing infrastructure. Results will be used to examine the impact on external costs. The analysis uses the method of shortest path to solve the traveling salesman problem. This method resolves the Hamiltonian graph to search of the minimum distance between all test points and determines the shortest path between them.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 9; 139-144
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Integrated Communications System for the Remote Operation of Unmanned Aerial Vehicle
    Autorzy:
    Kurek, K.
    Keller, T.
    Modelski, J.
    Yashchyshyn, Y.
    Pastuszak, G.
    Darmetko, M.
    Bajurko, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/116567.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    communication system
    remote operation
    wireless system
    Opis:
    The aim of the paper is to present the concept of the integrated system dedicated for communication and remote operation of the unmanned aerial vehicle (UAV). In the paper the concept and realization of this kind of wireless communications system is presented. The system consists of two integrated solutions – unidirectional broadcast transmission of video, audio and data from UAV to the operators within the mobile command centre and two‐way communication with the telemetry and control subsystem. The systems are integrated within the single chassis and placed on the UAV to ensure proper operation of the flying robot. The specific elements of the system are presented as well as main requirements and connected with them development methods are also discussed in the paper.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 2; 235-242
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hydrogen Production in Institute of Fluid Machinery of Polish Academy of Science in Gdańsk — theory and practice
    Autorzy:
    Sołowski, G.
    Czylkowski, D.
    Hrycak, B.
    Siuzdak, K.
    Pastuszak, K.
    Cenian, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1190155.pdf
    Data publikacji:
    2019
    Wydawca:
    Gdańska Szkoła Wyższa
    Tematy:
    hydrogen
    dark fermentation
    plasmolysis
    photochemical water oxidation
    Opis:
    The hydrogen production technologies developed in the Institute of Fluid-Flow Machinery, Polish Academy of Sciences in Gdańsk are discussed here. They include the following methods: dark fermentation, photoelectrochemical water oxidation and hydrocarbons (or alcohols) reforming by microwave plasma. The potential of hydrogen production by using dark fermentation of different popular wastes such as: agricultural wastes, textile or wood waste, was determined using suitable models. Also, the influence of microaeration during dark fermentation of some substrates, e.g. sour cabbage, was tested. Photochemical oxidation is a water-splitting process driven by radiation at the surface of a titanium-oxide anode. The Si microrods covered by titania films were verified as a photoanode material. The hydrogen production from methane, ethanol, isopropanol and kerosene was driven by a microwave plasma. The results obtained confirm that microwave plasma sources have a high potential for hydrogen production via gaseous and liquid fuels reforming.
    Źródło:
    Eco-Energetics: technologies, environment, law and economy; 2019, 2; 135--144
    2657-5922
    2657-7674
    Pojawia się w:
    Eco-Energetics: technologies, environment, law and economy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Accelerometer profile of motion of the pelvic girdle in butterfly swimming
    Autorzy:
    Staniak, Z.
    Buśko, K.
    Górski, M.
    Pastuszak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/306410.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    pływanie
    przyspieszenie
    prędkość
    swimming
    butterfly swimming
    acceleration
    velocity
    profile of pelvic girdle motion
    Opis:
    Purpose: The aim of the study was to develop a method to measure and analyse kinematics of movement of the pelvic girdle in butterfly swimming in order to support training of technical skills. Methods: A device for recording triaxial accelerations and triaxial rotational angular velocities was mounted on the dorsal part of the pelvic girdle of athlete. The measurements were performed in ten elite butterfly swimmers (age: 23.1 ± 3.7 years, body height: 187.6 ± 4.3 cm, body mass 83.4 ± 6.33 kg). The task of the athlete was to swim one length of short course pool at maximal intensity. Individual mean graphical and numerical profiles of the kinematics of the movement of the pelvic girdle was computed, within the average cycle based on five consecutive cycles. Results: Statistical analysis of numerical individual parameters of profiles of the athletes studied revealed statistically significant differences between the swimmers. Statistically significant correlations were also found between personal best times in 50 m swimming (r = –0.76, p < 0.05) and 100 m swimming (r = –0.76, p < 0.05) and duration of the part of the cycle connected with the decline in velocity from maximum translational motion velocity obtained during propulsion with the upper and lower limbs to minimum value of the velocity obtained before the beginning of propulsion only with the lower limbs. Conclusion: The proposed measurement method, presentation and analysis of the profile of the pelvic girdle motion in butterfly swimming represents a good tool for fast and effective qualitative and quantitative biomechanical evaluation of movement technique components.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2018, 20, 1; 159-167
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A study of episodic events in the Baltic Sea – combined in situ and satellite observations
    Autorzy:
    Lysiak-Pastuszak, E.
    Bartoszewicz, M.
    Bradtke, K.
    Darecki, M.
    Drgas, N.
    Kowalczuk, P.
    Krasniewski, W.
    Krezel, A.
    Krzyminski, W.
    Lewandowski, L.
    Mazur-Marzec, H.
    Piliczewski, B.
    Sagan, S.
    Sutryk, K.
    Witek, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/48563.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Baltic Sea
    Ferry Box project
    algal bloom
    hepatotoxin
    satellite image
    coastal water
    oceanic water
    salinity
    temperature
    Opis:
    A project was developed concerning the operational system of surveillance and the recording of episodic events in the Baltic Sea. In situ information was to be combined with multi-sensory satellite imagery to determine the extent of algal blooms, to track their evolution and that of rapid environmental events like hydrological fronts. The main element of the system was an autonomous Ferry Box module on a ferry operating between Gdynia and Karlskrona, automatically measuring temperature, salinity and chlorophyll a fluorescence. At pre-selected locations, discrete water samples were collected, which were subsequently analysed for their phytoplankton content, and algal hepato- and neurotoxins; they were also used in toxicity tests with Artemia franciscana.
    Źródło:
    Oceanologia; 2012, 54, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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