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Wyszukujesz frazę "Zalewski, Robert." wg kryterium: Autor

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    Tytuł:
    Preliminary study of the Vacuum Packed Particles torsional damper
    Autorzy:
    Zalewski, Robert
    Rodak, Dominik
    Powiązania:
    https://bibliotekanauki.pl/articles/1839686.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    Vacuum Packed Particles
    torsional damper
    experimental research
    Bouc-Wen model
    Opis:
    The paper presents a prototype of an innovatory controllable torsional damper. The device is composed of Vacuum Packed Particles. Such structures are made of granular materials placed in a hermetic soft encapsulation. Generating so called underpressure inside the system changes global dissipative properties of the granular structure. The partial vacuum value is a convenient way to control physical properties of the granular structure. The authors introduce an original prototype of a torsional vibration attenuator. In the experimental part, preliminary experimental results are presented and discussed. To capture the real response of the device, a Bouc-Wen rheological model is adopted.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2021, 59, 1; 173-178
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Concept of an adaptive-tuned particles impact damper
    Autorzy:
    Żurawski, Mateusz
    Zalewski, Robert
    Chiliński, Bogumił Daniel
    Powiązania:
    https://bibliotekanauki.pl/articles/2055066.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    particles impact damper
    adaptive-passive damping
    smart materials
    granular materials
    Opis:
    The most popular devices for attenuation of mechanical vibrations are dampers or shock absorbers. Two main energy dissipation strategies can be generally distinguished: passive and active (semi-active). Passive vibration isolation methods are the most commonly used, mainly because of their simplicity and low maintenance costs. Among passive vibration attenuation techniques, also Particle Impact Dampers (PID) are involved. Classical PID solutions have some certain limitations. This paper aims at presenting the new concept of an adaptive tuned PID damper that can pretend to be placed among semi-active energy dissipation methods.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2020, 58, 3; 811-816
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adaptive crash energy absorber based on a granular jamming mechanism
    Autorzy:
    Bartkowski, Piotr
    Bukowiecki, Hubert
    Gawiński, Franciszek
    Zalewski, Robert
    Powiązania:
    https://bibliotekanauki.pl/articles/2173524.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    granular jamming
    smart structures
    crash energy absorption
    zagłuszanie ziarniste
    konstrukcje inteligentne
    pochłanianie energii zderzenia
    Opis:
    The following discussion concerns the use of innovative smart materials called vacuum-packed particles (VPPs) as active energy absorbers. VPP, also known as a granular jamming system, is a structure composed of granular media contained within an elastomer coating. By changing the vacuum pressure inside the coating, it is possible to control the mechanical properties of the structure. VPPs have many applications, e.g. in medicine, robotics, and vibration damping. No attempts have yet been made to use VPPs to absorb the energy of a collision, although, given their properties, this could very well be an interesting application. In the first part of the paper, the general concept of the absorber is presented. Then a prototype and the empirical tests conducted are precisely described. The middle part of the paper considers the basic properties of VPP and modeling methodology. A proposal for a constitutive equation is presented, and a numerical simulation using LS-Dyna was performed. In the final section, the concept of a smart parking post is presented.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 1; e139002, 1--8
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Responsive Space Assets for Polish Armed Forces: Feasibility Study
    Autorzy:
    Kiszkowiak, Łukasz
    Olejnik, Aleksander
    Rogólski, Robert
    Walkowiak, Marcin
    Zalewski, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/2174773.pdf
    Data publikacji:
    2022
    Wydawca:
    Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
    Tematy:
    air-assisted rocket launch system
    defense
    satellite
    space
    safety
    system wyrzutni rakiet wspomaganych powietrzem
    obrona
    satelita
    przestrzeń kosmiczna
    bezpieczeństwo
    Opis:
    This study proposes an alternative (i.e., air-assisted) system for launching payloads (micro-satellites) into space using rockets fired from Su-22 or MiG-29 combat aircraft . This paper verifies and evaluates such an air-assisted rocket system used for launching payloads to low Earth orbit (LEO) in many aspects. Mission profile and rocket drop maneuver concepts have been developed. From the adopted model of calculations and simulation results, it follows that in the considered configuration, the aforementioned aircraft will be capable of accomplishing a mission in which a payload of at least 10 kg is launched into low Earth orbit. The analyses were complemented by simulations and wind tunnel tests verifying the impact that space rockets may exert on the aerodynamic and mechanical properties of the carrier aircraft . Results of numerical simulations and wind tunnel tests to which models of the air-assisted rocket launching system were subjected indicate the rocket’s impact on the aerodynamic characteristics of the aircraft and its in-flight properties is negligible. Similarly, load and strength tests to which the airframe’s load-bearing structures have been subjected also failed to show any significant changes or deformations caused by the space rockets attached. The kits proposed may be deemed as the so-called Responsive Space Assets for the Polish Armed Forces. Implementation of such a system not only offers independence from countries or commercial companies providing space services but also allows us to master new capabilities in the context of deploying satellite systems for safety and defense purposes.
    Źródło:
    Safety & Defense; 2022, 1; 30--40
    2450-551X
    Pojawia się w:
    Safety & Defense
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    THE RADIOSTABILITY OF BETAMIPRON IN THE SOLID STATE
    Autorzy:
    Zalewski, Przemysław
    Kilińska, Karolina
    Cielecka-Piontek, Judyta
    Skibiński, Robert
    Miklaszewski, Andrzej
    Bednarski, Waldemar
    Powiązania:
    https://bibliotekanauki.pl/articles/895691.pdf
    Data publikacji:
    2019-08-30
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Tematy:
    EPR
    radiation sterilization
    radiostability
    Q-TOF
    betamipron
    Opis:
    The influence of ionising radiation on physicochemical properties of betamipron in solid state was studied. No changes for betamipron irradiated with a dose of 25 kGy, required to attain sterility, was observed by spectroscopic and chromatographic methods. Solid betamipron has proven to be very stable on irradiation, and irradiation has been found to be a suitable method for its sterilization.
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 4; 629-634
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    THE RADIOLYTIC STUDIES OF DORIPENEM MONOHYDRATE IN THE SOLID STATE
    Autorzy:
    Zalewski, Przemysław
    Kilińska, Karolina
    Piontek, Judyta C.
    Skibiński, Robert
    Szymanowska, Daria
    Miklaszewski, Andrzej
    Bednarski, Waldemar
    Powiązania:
    https://bibliotekanauki.pl/articles/895484.pdf
    Data publikacji:
    2018-10-31
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Tematy:
    doripenem
    radiation sterilization
    microbiological activity
    radiostability
    Q-TOF
    Opis:
    The influence of ionising radiation on physicochemical properties of doripenem in solid state was studied. No changes for doripenem irradiated with a dose of 25 kGy, required to attain sterility, was observed by FT-IR and chromatographic methods, although the presence of free radicals (7.7*1017 radicals/g) was detected by EPR. The antibacterial activity of doripenem irradiated with a dose of 25 kGy was unchanged. Solid doripenem has proven to be very stable on irradiation, and irradiation has been found to be a suitable method for its sterilization.
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2018, 75, 5; 1127-1133
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    THE RADIATION STERILIZATION OF IMIPENEM AND CILASTATIN IN THE SOLID STATE
    Autorzy:
    Zalewski, Przemysław
    Kilińska, Karolina
    Piontek, Judyta C.
    Miklaszewski, Andrzej
    Szymanowska, Daria
    Skibiński, Robert
    Bednarski, Waldemar
    Powiązania:
    https://bibliotekanauki.pl/articles/895601.pdf
    Data publikacji:
    2019-06-28
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Tematy:
    imipenem
    radiation sterilization
    microbiological activity
    radiostability
    Q-TOF
    Opis:
    One of the best sterilization methods for chemically unstable drugs, such as carbapenems, is irradiation. The chemical and physical properties of radiosterilized imipenem and cilastatin were analyzed using spectrophotometric and chromatographic methods. Unstable free radicals were presented in samples after irradiation; their mean lifetime was 142±64 h. The antibacterial activity of cefozopran hydrochloride irradiated with a dose of 25 kGy changed for Klebsiella pneumoniae and Escherichia coli. Imipenem and cilastatin in the solid state are not resistant to radiation sterilization; therefore, this method cannot be used for sterilization of this compound.
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 3; 431-438
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The radiolytic studies of panipenem in the solid state
    Autorzy:
    Zalewski, Przemysław
    Rosiak, Natalia
    Kilińska, Karolina
    Skibiński, Robert
    Szymanowska, Daria
    Tykarska, Ewa
    Piekara-Sady, Lidia
    Lewandowska, Kornelia
    Miklaszewski, Andrzej
    Piontek, Judyta C.
    Powiązania:
    https://bibliotekanauki.pl/articles/895501.pdf
    Data publikacji:
    2020-04-29
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Tematy:
    HPLC
    FT-IR
    EPR
    radiation sterilization
    Q-TOF
    panipenem
    Opis:
    The influence of ionizing radiation on the physicochemical properties of panipenem in solid state was studied. In the first part of our studies, we evaluated the possibility of applying radiosterilization to obtain sterile panipenem. Spectroscopic (FT-IR, Raman), chromatography (HPLC and HPLC-MS) and X-ray powder diffraction (XRPD) studies have shown that irradiation of ertapenem with the 25 kGy, the dose required to achieve sterility, does not change the physicochemical properties of the studied compound. The antimicrobial activity of panipenem irradiated with the dose of 25 kGy was reduced for three species. It was confirmed that the decrease in antimicrobial activity might be related to isomerization of panipenem.
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2020, 77, 2; 241-250
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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