Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "Popovych, I." wg kryterium: Autor


Wyświetlanie 1-8 z 8
Tytuł:
Uncertainty evaluation of the minimal value measurements
Autorzy:
Dorozhovets, M.
Warsza, Z. L.
Popovych, I.
Powiązania:
https://bibliotekanauki.pl/articles/114616.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
minimal value of observations
uncertainty type A
Opis:
The non-standard statistical method for evaluating uncertainty for a minimal value of observations as the measurement result, is proposed. This method is based on properties of minimal order statistic. As example from the practice this method is used to evaluate the uncertainty of a percent elongation and tensile strength in testing plastic products.
Źródło:
Measurement Automation Monitoring; 2015, 61, 8; 395-398
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The mathematical modeling and investigation of the stress-strain state of the three-layer thermosensitive hollow cylinder
Autorzy:
Rakocha, I.
Popovych, V.
Powiązania:
https://bibliotekanauki.pl/articles/387593.pdf
Data publikacji:
2016
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
three-layered cylinder
thermosensitive materials
temperature
thermostressed state
materiały termoczułe
cylinder trójwarstwowy
rozkład temperatury
Opis:
Stationary temperature distribution in a three-layer infinite hollow cylinder based on the thermosensitive body model was determined. The cylinder is subjected to the steady temperature on the inner surface and on the outer one is present the convective heat exchange. In the second layer exist heat sources with parabolic dependence on radial coordinate. The components of the thermostressed state have been found. The influence of the temperature dependence of the thermal and mechanical components characteristics of materials on the temperature distribution has been investigated.
Źródło:
Acta Mechanica et Automatica; 2016, 10, 3; 181-188
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dyson line and modified Dyson line in the EPR measurements
Autorzy:
Popovych, V.
Bester, M.
Stefaniuk, I.
Kuzma, M.
Powiązania:
https://bibliotekanauki.pl/articles/148008.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
EPR
FMR
Dyson line
CdCrTe
Opis:
The difficulty in determining the electron paramagnetic resonance (EPR) line parameters of ferromagnetic semiconductors has been addressed. For these materials, the resonance line is very broad and lies at low resonance fi eld, so that only a part of the line can be detected experimentally. Moreover, the line is of asymmetric (Dysonian) shape as described by the line shape parameter α. We have compared values of line parameters derived by computer fi tting of the whole experimental EPR line to the Dyson function (or modified Dyson function) with the values obtained by applying this procedure to the left and the right half of the line.
Źródło:
Nukleonika; 2015, 60, No. 3, part 1; 385-388
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ferromagnetic Resonance in CdTe:Cr Single Crystals Containing Dopant-Related Macrodefects
Autorzy:
Popovych, V.D.
Kuzma, M.
Skop, N.
Stefaniuk, I.
Cieniek, B.
Powiązania:
https://bibliotekanauki.pl/articles/1030219.pdf
Data publikacji:
2017-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.72.-y
68.37.Hk
76.50.+g
Opis:
We study CdTe:Cr single crystals grown by the physical vapor transport method from pre-synthesized (Cd,Cr)Te alloys with 5 at.% of chromium nominal content. Macrodefects in the form of (111)-oriented thin platelets of dopant-related second phases were detected by scanning electron microscopy patterning of the chemically treated surfaces of the crystals. Magnetic properties of the crystals were investigated by ferromagnetic resonance using X-band Bruker spectrometer (9.43 GHz). Their ferromagnetic resonance spectra show several broad lines, which position depends on the orientation of the sample in relation to the external magnetic field in spectrometer. The angular dependences of ferromagnetic resonance spectra are interpreted in the frame of shape anisotropy of ferromagnetic resonance of the planar defects embedded in a weak magnetic CdTe matrix.
Źródło:
Acta Physica Polonica A; 2017, 132, 1; 34-38
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of physical activity, body mass index and self-assessment of physical fitness in female students and pupils of Ternopil, Western Ukraine
Ocena aktywności fizycznej, wskaźnika masy ciała i samooceny sprawności fizycznej wsród studentek i uczennic z Tarnopola, Ukraina Zachodnia
Autorzy:
Popovych, D.
Bergier, J.
Korda, M.
Klishch, I.
Sopel, O.
Tsybulskaya, L.
Powiązania:
https://bibliotekanauki.pl/articles/2052705.pdf
Data publikacji:
2017
Wydawca:
Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:
physical activity
IPAQ-L
Body Mass Index (BMI)
self-assessment
physical fitness
female
student
aktywność fizyczna
BMI
samoocena
sprawność fizycznej
kobieta
Opis:
Background. Lifestyle is one of the key factors that determines the proper development of human body, its systems and functions. An appropriate level of physical activity and BMI are thus integral components of a healthy lifestyle. Material and methods. The study involved 333 female students of Ternopil State Medical University and 409 schoolgirls of Ternopil, western Ukraine. The International Physical Activity Questionnaire (IPAQ-L) was used as a research method. BMI and physical activity self-assessment rates were also considered. Results. The surveyed female students of Ternopil State Medical University and schoolgirls of Ternopil (western Ukraine) demonstrate a high level of total physical activity. Most of the surveyed female students (71.1%) and pupils (59.4%) had normal body weight. The schoolgirls’ self-assessment of physical fitness was lower and more adequate when compared to that of female students. Besides, both students and pupils who indicated that they had no free time spent it in a more reasonable way than those who considered that they had enough of it or not enough. Conclusions. The female students of medical university and female pupils of Ternopil are fully aware that physical activity is significant for their lives and that it constitutes a key factor to a healthy lifestyle.
Wprowadzenie. Styl życia jest jednym z kluczowych czynników determinujących prawidłowy rozwój ludzkiego ciała, jego systemów i funkcji. Odpowiedni poziom aktywności fizycznej i BMI są zatem integralnymi składnikami zdrowego stylu życia. Materiał i metody. W badaniu wzięło udział 333 studentek Państwowego Uniwersytetu Medycznego w Tarnopolu oraz 409 dziewcząt z Tarnopola, zachodnia Ukraina. Jako metodę badawczą zastosowano Międzynarodowy Kwestionariusz Aktywności Fizycznej (IPAQ-L). Wzięto również pod uwagę wskaźniki BMI i samooceny aktywności fizycznej. Wyniki. Badane studentki z Państwowego Uniwersytetu Medycznego w Tarnopolu i uczennice z Tarnopola (zachodnia Ukraina) wykazują wysoki poziom aktywności fizycznej. Większość badanych studentek (71,1%) i uczennic (59,4%) ma normalną masę ciała. Samoocena sprawności fizycznej uczennic była niższa, ale bardziej adekwatna niż studentek. Ponadto, zarówno uczennice, jak i studentki, które wskazywały na brak wolnego czasu, potrafiły go wykorzystać w bardziej rozsądny sposób niż te, które uważały, że mają go wystarczająco dużo lub zbyt mało. Wnioski. Studentki uniwersytetu medycznego i uczennice z Tarnopola są w pełni świadome, że aktywność fizyczna jest ważna w ich życiu i że stanowi kluczowy czynnik w kształtowaniu zdrowego stylu życia.
Źródło:
Health Problems of Civilization; 2017, 11, 3; 163-172
2353-6942
2354-0265
Pojawia się w:
Health Problems of Civilization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of strength of carrying metal structures of trailers
Autorzy:
Popovych, P.
Poberezhny, L.
Shevchuk, O.
Murovanyi, I.
Dovbush, T.
Koval, Yu.
Hrytsuliak, H.
Powiązania:
https://bibliotekanauki.pl/articles/368623.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
trailer
strength
design model
metal construction
bearing frame
potential of minimum potential energy
stress-strain state
przyczepa
wytrzymałość
model projektowy
konstrukcja metalowa
rama nośna
energia potencjalna
stan naprężenie-odkształcenie
Opis:
Purpose: Development of a computational model of stress-strain state bearing elements of trailer frames for preliminary assessment and identification of areas with increased risk of failure. Design/methodology/approach: The object of the study is the processes of loading the load-bearing metal structures of trailers - fertilizer spreaders. The stress-strain state of the spreader bearing system is investigated for the established three typical cases of external load. To refine the values obtained as a result of modelling, they were determined in SOLIDWORKS. Findings: Computational models of load have been compiled by improving the method of minimum potential deformation energy for its effective correct use in analytical studies of a similar type of metal structures. It is proved that for a flat closed frame structure made of thin-walled profiles, loaded with forces perpendicular to the plane of the frame, the levelling of compression and shear energies, as well as axial and transverse forces and bending moments in the horizontal plane does not significantly affect the calculation results. Research limitations/implications: Horizontal components of the shear forces as well as the normal forces and as a consequence the corresponding potential deformation energy are neglected, which has some effect on the accuracy of the calculations. Practical implications: An effective tool for strength analysis with preliminary assessment and diagnostics of load-bearing metal structures based on the constructed calculation models of stress strain state load-bearing frames of typical geometry with an arbitrarily given distribution of external load. Originality/value: A universal algorithm for recording additive functions of bending and torques, as well as the potential deformation energy of welded frames of trailers.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2020, 100, 2; 58-69
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of thermomechanical processes in disc brakes of wheeled vehicles
Autorzy:
Hrevtsev, O.
Selivanova, N.
Popovych, P.
Poberezhny, L.
Sakhno, V.
Shevchuk, O.
Poberezhna, L.
Murovanyi, I.
Hrytsanchuk, A.
Romanyshyn, O.
Powiązania:
https://bibliotekanauki.pl/articles/1818803.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
disc brake
wheeled vehicle
angular velocity
thermodynamically reversible process
centrifugal force
time of relaxation
isotropic elastic medium
torsional moment
hamulec tarczowy
pojazd kołowy
prędkość kątowa
siła odśrodkowa
izotropowy ośrodek sprężysty
moment skręcający
Opis:
Purpose: Ensuring the required operational reliability of disc brakes by forecasting their technical condition taking into account thermomechanical processes. Design/methodology/approach: Differential equations of rotation of a rigid body around a fixed axis are solved, it is established that the equations of motion and the equations of thermal conductivity are indirectly related. The use of these analytical dependences provides a better understanding of thermomechanical transients. Findings: The solution is obtained on the basis of the differential equation of thermal conductivity of the hyperbolic type, which does not allow an infinite velocity of propagation of temperature perturbations in contrast to the differential equation of thermal conductivity of the parabolic Fourier type. The obtained analytical dependences provide a better understanding of thermomechanical transients and develop a theoretical basis for determining stresses and heat fluxes in solving problems of reliability and durability of disc brakes. Research limitations/implications: The work uses generally accepted assumptions and limitations for thermomechanical calculations. Practical implications: It is shown, that transients in a mechanical system - a brake disk at impulse loadings cause emergence of thermal effects which arise under the influence of external loadings. Originality/value: The application of these analytical dependences provides a better understanding of thermomechanical transients and develops a theoretical basis for solving problems of reliability and durability of disc brakes.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2021, 104, 1; 11--20
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical and electrical properties of highly doped ZnO:Al films deposited by atomic layer deposition on Si substrates in visible and near infrared region
Autorzy:
Romanyuk, V.
Dmitruk, N.
Karpyna, V.
Lashkarev, G.
Popovych, V.
Dranchuk, M.
Pietruszka, R.
Godlewski, M.
Dovbeshko, G.
Timofeeva, I.
Kondratenko, O.
Taborska,, M.
Ievtushenko, A.
Powiązania:
https://bibliotekanauki.pl/articles/1156366.pdf
Data publikacji:
2016-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.66.Hf
73.61.Ga
Opis:
Optical properties of ZnO films doped by Al in the range 0.5 to 7 at.% and deposited by atomic layer deposition were studied in visible and infrared spectral range. Spectral dependences of film optical permittivity were modeled with the Lorentz-Drude approximation resulting in ZnO:Al plasma frequency and plasma damping parameters. We observed changing electron effective mass from 0.29m₀ to 0.5m₀ with increasing electron concentration in the range (0.9-4) × 10²⁰ due to the phenomenon of conduction band non-parabolicity. Comparing the results of optical and electrical investigations we can see that the main scattering mechanism is the scattering on grain boundaries (its contribution is about 60%).
Źródło:
Acta Physica Polonica A; 2016, 129, 1a; A-36-A-40
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-8 z 8

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies