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


Wyświetlanie 1-8 z 8
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 1-8 z 8

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