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    Wyświetlanie 1-14 z 14
    Tytuł:
    Local distributions of fluid velocity and tracer concentration in a tank reactor
    Autorzy:
    Makowski, Ł.
    Orciuch, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/185289.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    PLIF
    PIV
    LES
    prędkość
    tracer concentration
    fluid velocity
    Opis:
    The aim of the project was to collect experimental data regarding local distributions of fluid velocity and inert tracer concentration in a tank reactor with turbulent flow. The experiments were performed in a microscale in a region of tracer fluid injection. The results of experiments can be used for direct validation of currently developed CFD models, particularly for time-dependent mixing models used in LES.
    Źródło:
    Chemical and Process Engineering; 2011, 32, 1; 33-40
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of Large Eddy Simulations and κ-ε Modelling of Fluid Velocity and Tracer Concentration in Impinging Jet Mixers
    Autorzy:
    Wojtas, K.
    Orciuch, W.
    Makowski, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/185361.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    jet mixer
    mixing
    PIV
    PLIF
    LES
    mieszalnik strumieniowy
    mieszanie
    Opis:
    Simulations of turbulent mixing in two types of jet mixers were carried out using two CFD models, large eddy simulation and k-ε model. Modelling approaches were compared with experimental data obtained by the application of particle image velocimetry and planar laser-induced fluorescence methods. Measured local microstructures of fluid velocity and inert tracer concentration can be used for direct validation of numerical simulations. Presented results show that for higher tested values of jet Reynolds number both models are in good agreement with the experiments. Differences between models were observed for lower Reynolds numbers when the effects of large scale inhomogeneity are important.
    Źródło:
    Chemical and Process Engineering; 2015, 36, 2; 251-262
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Survey of Energy Harvesting Systems for Wireless Sensor Networks in Environmental Monitoring
    Autorzy:
    Dziadak, B.
    Makowski, Ł.
    Michalski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/220866.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    environmental monitoring
    wireless sensor networks
    energy harvesting
    Opis:
    Wireless Sensor Networks (WSNs) have existed for many years and had assimilated many interesting innovations. Advances in electronics, radio transceivers, processes of IC manufacturing and development of algorithms for operation of such networks now enable creating energy-efficient devices that provide practical levels of performance and a sufficient number of features. Environmental monitoring is one of the areas in which WSNs can be successfully used. At the same time this is a field where devices must either bring their own power reservoir, such as a battery, or scavenge energy locally from some natural phenomena. Improving the efficiency of energy harvesting methods reduces complexity of WSN structures. This survey is based on practical examples from the real world and provides an overview of state-of-the-art methods and techniques that are used to create energyefficient WSNs with energy harvesting.
    Źródło:
    Metrology and Measurement Systems; 2016, 23, 4; 495-512
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some practical problems of communications reliability inenviromental monitoring systems
    Autorzy:
    Dziadak, B.
    Makowski, L.
    Michalski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/220493.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    monitoring systems
    GSM communication
    floating buoy
    real-time messaging
    Opis:
    In this paper, some issues of building a reliable, distributed measurement system for monitoring of water quality in reservoir Lake Dobczyckie are presented. The system is based on a measurement station that has the shape of a floating buoy which is supposed to be at anchor on the reservoir. Wireless data transmission problems that were encountered during the development of the buoy, modeling a radio link, and measurements of actual signal strength on the reservoir are discussed. A mathematical approach to procedures of early situation assessment was conducted, and specialized procedures were designed for measurement stations of the system. It is also discussed how such computations can improve a qualitative assessment of system performance in terms of real-time messaging.
    Źródło:
    Metrology and Measurement Systems; 2013, 20, 3; 337-350
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation on the course of complex processes carried out in vortex impinging jet reactors
    Autorzy:
    Wojtas, K.
    Rybałtowska, A.
    Witkowski, D.
    Makowski, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/115849.pdf
    Data publikacji:
    2015
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    jet reactor
    mixing
    chemical reaction
    precipitation
    numerical simulation
    reaktor strumieniowy
    mieszanie
    reakcja chemiczna
    osad
    symulacja numeryczna
    Opis:
    The paper presents an application of CFD simulations to predict a course of complex processes carried out in jet reactors. In this work the simulations results were verified with PIV and PLIF techniques and validated by comparing model predictions with experimental data for fast parallel chemical test reactions. Experimental results of BaSO4 precipitation in jet reactors are also discussed.
    Źródło:
    Challenges of Modern Technology; 2015, 6, 4; 31-35
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sensors networks for petroleum derivative pollution monitoring system
    Sieć czujnikowa do monitorowania skażeń produktami ropopochodnymi
    Autorzy:
    Kalicki, A.
    Michalski, A.
    Staroszczyk, Z.
    Dziadak, B.
    Makowski, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/256737.pdf
    Data publikacji:
    2006
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
    Tematy:
    system pomiarowy
    skażenie ropopochodne
    system monitorujący
    bezprzewodowy system pomiarowy
    sieć czujnikowa
    measurement system
    petroleum derivative pollution
    hydrocarbon pollution
    monitoring system
    wireless measurement system
    sensors networks
    Opis:
    This paper discusses the solution of the www petroleum derivative pollution monitoring system. The main aim of this paper is to present the authors' approach to the very current problem of the practical realisation of the www, server based, measuring system. The idea of the system is based on collecting data from mobile GSM/GPRS accessed observation points (MOP), and delivering information on potential pollution to the authorised www clients. Data transfer between MOP and the clients is controlled by the www server. Two types of dedicated MOPs are discussed, based on microcomputer PC 104+ and on microcontroller ADAM 4500. Two different approaches to server realisation are presented: Windows oriented based on Visual Studio. NET, and WAMP oriented, based on the open software.
    W artykule przedstawiono system monitorowania skażeń produktami ropopochodnymi, bazujący na sieci WWW. Głównym celem artykułu jest przedstawienie podejścia Autorów do bardzo aktualnego problemu praktycznej budowy systemów pomiarowych wykorzystujących strony WWW i szeroko rozumiany Internet. Idea systemu zakłada zbieranie danych poprzez sieć GSM/GPRS z mobilnych punktów pomiarowych (MPP) i przekazywanie ich za pośrednictwem stron WWW do potencjalnych autoryzowanych odbiorców. Transmisja danych pomiędzy MPP a odbiorcami jest kontrolowana za pomocą serwera WWW. Dwa typy MPP są analizowane, jeden oparty o mikrokomputer PC 104+, drugi bazujący na mikrokontrolerze ADAM 4500. Również są analizowane dwa podejścia do realizacji serwera, jeden bazujący na Visual Studio.NET, drugi wykorzystuje technologie WAMP.
    Źródło:
    Problemy Eksploatacji; 2006, 4; 137-152
    1232-9312
    Pojawia się w:
    Problemy Eksploatacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vibration investigation of vehicle equiped with controlled piezoelectric dampers
    Autorzy:
    Makowski, M.
    Knap, L.
    Grzesikiewicz, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/247188.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    transport
    piezoelectric damper
    simulation
    control algorithms
    adaptive suspension
    Opis:
    In this paper an effect of controlling damping force in a vehicle suspension system is discussed. A vehicle suspension system is equipped with controlled piezoelectric dampers (PZD) which allow controlling vehicle body vibration. The main goal of performed and presented in the paper studies was to determine the properties of piezoelectric damper and propose control strategy. As piezoelectric damper was used hydraulic cylinder with piezoelectric valve controlling flows between chambers of the damper. Some results of experimental studies of the damper dissipation characteristics were obtained and are presented. Vertical vibration reduction of vehicle body has an influence on comfort and safety by decreasing a value in wheel contact forces variation. Control of friction in a vehicle suspension system can be realized by controlling piezoelectric valves and flows between chambers of the PZD dampers. In this paper also some algorithms of vibration control are proposed and discussed. The main goal of this paper is to investigate issues associated with control algorithms for an adaptive (semi-active) suspension system of a vehicle equipped with new type of semi-active dampers. The paper presents results of numerical simulations of a vehicle suspension system equipped with a piezoelectric damper.
    Źródło:
    Journal of KONES; 2011, 18, 4; 251-257
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Conversion of energy in electric drive supported by the hydrostatic drive
    Autorzy:
    Grzesikiewicz, W.
    Makowski, M.
    Knap, L.
    Pokorski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/247488.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    numerical simulation
    hybrid drive
    electric drive
    hydrostatic drive
    energy conversion
    city traffic
    symulacja numeryczna
    napęd hybrydowy
    napęd elektryczny
    napęd hydrostatyczny
    konwersja energii
    ruch miejski
    Opis:
    In the article, a study of conversion of energy in a hybrid (electro-hydrostatic) drive of a utility van intended for city traffic is described. In this hybrid drive, the electric drive is periodically accompanied by hydrostatic drive, especially during acceleration and regenerative braking of the vehicle. We present a mathematical model of the hybrid drive as a set of dynamics and regulation equations of the van traveling at a given speed. On this basis, we construct a computer program, which we use to simulate the processes of energy conversion in electro-hydrostatic hybrid drive. The main goal of the numerical simulation is to assess the possibility of reducing energy intensity of the electric drive through such a support of the hydrostatic drive. Our results indicate that it is possible to significantly increase the efficiency of energy conversion in the electric drive by support of the hydrostatic drive. In the article, chosen results of simulation studies for multiple starting and braking the car are given, and they show a 30% decrease for energy drawn by the hybrid drive, compared to solely electric drive.
    Źródło:
    Journal of KONES; 2018, 25, 1; 143-150
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies of electric drive with hydrostatic support
    Autorzy:
    Grzesikiewicz, W.
    Makowski, M.
    Knap, L.
    Pokorski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/243753.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    hybrid drive
    energy consumption
    energy efficiency
    regenerative braking
    city traffic
    napęd hybrydowy
    zużycie energii
    efektywność energetyczna
    hamowanie regeneracyjne
    ruch miejski
    Opis:
    In this article, results of experimental studies concerning the relief of a city car electric drive by means of hydrostatic drive support are presented. Experimental studies were performed using a laboratory station built for this particular purpose. Studies of basic properties of elements of hydraulic system and resistances in the mechanical system were performed. The results of experimental studies of a chosen sub-assembly of hydrostatic drive (i.e. hydro-pneumatic battery) are given. The resistances within mechanical system (flywheel) were determined. In the considered hybrid drive, electric drive is cyclically supported by hydrostatic drive during acceleration or regenerative braking of the vehicle. The results of experimental studies presented in this article were obtained on a designed and built laboratory station representing a model of a lightweight delivery van for city traffic and equipped with the studied hybrid drive. The obtained results suggest that there is a possibility considerably to increase the effectiveness of energy conversion in the electric drive of the vehicle by means of hydrostatic support. By applying the hydrostatic support in the electric drive, the load on the electric battery decreased, which positively influences the length of operation time.
    Źródło:
    Journal of KONES; 2018, 25, 1; 265-274
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Software for data acquisition AMC module with PCI express interface
    Autorzy:
    Szachowałow, S.
    Jabłoński, G.
    Sakowicz, B.
    Makowski, D.
    Butkowski, Ł.
    Koprek, W.
    Simrock, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/397909.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    akcelerator liniowy
    przetwornik analogowo-cyfrowy
    linear accelerator
    advanced mezzanine card
    analog to digital converter
    PCI express
    Opis:
    Free Electron Laser in Hamburg (FLASH) and X-Ray Free Electron Laser (XFEL) are linear accelerators that require a complex and accurate Low Level Radio Frequency (LLRF) control system. Currently working systems are based on aged Versa Module Eurocard (VME) architecture. One of the alternatives for the VME bus is the Advanced Telecommunications and Computing Architecture (ATCA) standard. The ATCA based LLRF controller mainly consists of a few ATCA carrier boards and several Advanced Mezzanine Cards (AMC). AMC modules are available in variety of functions such as: ADC, DAC, data storage, data links and even CPU cards. This paper focuses on the software that allows user to collect and plot the data from commercially available TAMC900 board.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2010, 1, 1; 95-98
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High Power Laser Laboratory at the Institute of Plasma Physics and Laser Microfusion : equipment and preliminary research
    Autorzy:
    Zaraś-Szydłowska, A.
    Badziak, J.
    Rosiński, M.
    Makowski, J.
    Parys, P.
    Piotrowski, M.
    Ryć, L.
    Wołowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/146603.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    femtosecond pulses
    high-power laser
    inertial confinement fusion
    laser plasma
    Opis:
    The purpose of this paper is to present the newly-opened High Power Laser Laboratory (HPLL) at the Institute of Plasma Physics and Laser Microfusion (IPPLM). This article describes the laser, the main laboratory accessories and the diagnostic instruments. We also present preliminary results of the first experiment on ion and X-ray generation from laser-produced plasma that has been already performed at the HPLL.
    Źródło:
    Nukleonika; 2015, 60, 2; 245-248
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of Magnetosomes After Exposure to the Effect of the Sonication and Ultracentrifugation
    Autorzy:
    Molčan, M.
    Hashim, A.
    Kováč, J.
    Rajňák, M.
    Kopčanský, P.
    Makowski, M.
    Gojzewski, H.
    Molokáč, M.
    Hvizdák, L.
    Timko, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1368025.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.07.-b
    75.60.-d
    87.50.Y-
    68.37.-d
    Opis:
    Magnetosomes are intracellular organelles of widespread aquatic microorganisms called Magnetotactic bacteria. At present they are under investigation especially in biomedical applications. This ability depends on the presence of intracellular magnetosomes which are composed of two parts: first, nanometer-sized magnetite $(Fe_{3}O_{4})$ or greigite $(Fe_{3}S_{4})$ crystals (magnetosome crystal), depending on the bacterial species; and second, the bilayer membrane surrounding the crystal (magnetosome membrane). The magnetosomes were prepared by biomineralization process of magnetotactic bacteria Magnetospirillum Magnetotacticum sp. AMB-1. The isolated magnetosome chains (sample M) were centrifugated at speed of 100000 rpm for 4 hours (sample UM) and sonicated at power of 120 W for 3 hours (sample SM), respectively. The prepared suspensions were investigated with respect to morphological, structural and magnetic properties. The results from scanning electron microscopy showed that isolated chains of magnetosomes were partially broken to smaller ones after ultracentrifugation. On the other hand the application of the sonication process caused the formation of individual magnetosomes (unordered in chain). These results were confirmed by coercivity and magnetization saturation measurements.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 198-199
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of an ATCA-based LLRF system at FLASH
    Autorzy:
    Simrock, S.
    Butkowski, Ł.
    Grecki, M.
    Jeżyński, T.
    Koprek, W.
    Jabłoński, G.
    Jałmużna, W.
    Makowski, D.
    Piotrowski, A.
    Sakowicz, B.
    Czuba, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/397843.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    akcelerator
    sterowanie
    sprzężenie zwrotne
    accelerator
    control
    feedback
    Advanced TCA
    Opis:
    Future RF Control systems will require simultaneous data acquisition of up to 100 fast ADC channels at sampling rates of around 100 MHz and real time signal processing within a few hundred nanoseconds. At the same time the standardization of Low-Level RF systems are common objectives for all laboratories for cost reduction, performance optimization and machine reliability. Also desirable are modularity and scalability of the design as well as compatibility with accelerator instrumentation needs including the control system. All these requirements can be fulfilled with the new telecommunication standard ATCA when adopted to the domain of instrumentation. We describe the architecture and design of an ATCA based LLRF system for the European XFEL. Initial results of the demonstration of such a system at the FLASH user facility will be presented. Presented are the results of operating essential components of a prototype during the machine studies in January and March 2009.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2010, 1, 1; 48-51
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comprehensive biological evaluation of biomaterials used in spinal surgery
    Autorzy:
    Komorowski, P.
    Kamińska, M.
    Jakubowski, W.
    Szymański, W.
    Walczyńska, M.
    Siatkowska, M.
    Działoszyńska, K.
    Sokołowska, P.
    Białkowska, K.
    Wasiak, T.
    Elgalal, M.
    Makowski, K.
    Kierzkowska, A.
    Ciupik, L.
    Walkowiak, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/283763.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    biomaterials
    spinal surgery
    biological tests
    Źródło:
    Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 23
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-14 z 14

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