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Wyszukujesz frazę "Hall Effect" wg kryterium: Temat


Tytuł:
A Device for Measuring the Rotational Speed of a Chain Sprocket of a Petrol Chainsaw
Autorzy:
Wróbel, Mateusz
Jakubek, Bartosz
Rukat, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/2123289.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
magnetic field
chainsaw
rotational speed measurement
chain sprocket
hall effect sensor
Opis:
The procedure for determining the frequency-weighted RMS values of vibration accelerations in the case of petrol chainsaws proposes equal time shares of three operation modes of the chainsaw. In order to assess the actual operator’s vibration exposure, it is necessary to precisely determine the above-mentioned shares. In real-life conditions operation of chainsaws is characterized by frequent and significant rotational speed changes depending on the operation mode. Therefore, a prototype of dedicated device for measuring the rotational speed of a chain sprocket was developed. The article presents development requirements, encountered problems and their solutions, the prototype itself and functional test results.
Źródło:
Advances in Science and Technology. Research Journal; 2021, 15, 3; 99--107
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hall effects and rotation effects on MHD flow past an exponentially accelerated vertical plate with combined heat and mass transfer effects
Autorzy:
Thamizhsudar, M.
Pandurangan, J.
Mathucumaraswamy, R.
Powiązania:
https://bibliotekanauki.pl/articles/265402.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
Hall effect
MHD flow
rotation
exponentially
accelerated plate
temperature
mass diffusion
magnetohydrodynamika
pole magnetyczne
prędkość osiowa
Opis:
A theoretical solution of flow past an exponentially accelerated vertical plate in the presence of Hall current and MHD relative to a rotating fluid with uniform temperature and mass diffusion is presented. The dimensionless equations are solved using the Laplace method. The axial and transverse velocity, temperature and concentration fields are studied for different parameters such as the Hall parameter (m), Hartmann number (M), Rotation parameter (Ω), Schmidt number, Prandtl number, thermal Grashof number (Gr) and mass Grashof number (Gc). It has been observed that the temperature of the plate decreases with increasing values of the Prandtl number and the concentration near the plate increases with decreasing values of Schmidt number. It is also observed that both axial and transverse velocities increase with decreasing values of the magnetic field parameter or rotation parameter, but the trend gets reversed with respect to the Hall parameter. The effects of parameters m, M, […], Gr and Gc on the axial and transverse velocity profiles are shown graphically.
Źródło:
International Journal of Applied Mechanics and Engineering; 2015, 20, 3; 605-616
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected Current Sensing Circuits for Motor Control Application
Wybrane metody pomiaru prądu w aplikacjach silników elektrycznych
Autorzy:
Słowik, W.
Piątek, P.
Dziwiński, T.
Baranowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/274787.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
current sensing
low side
high side
current sense amplifier
instrumentation amplifier
hall effect sensor
pomiar prądu
wzmacniacz pomiarowy
wzmacniacz instrumentalny
czujnik Halla
silnik bezszczotkowy
Opis:
Precise current measurements are essential part of modern motor control algorithms. They are also required in switch mode power converters, safety circuits, current sources, supervisor systems and many other applications. In order to select the right method, it is often required from the designer to have wide knowledge of the appropriate integrated circuit, its parameters and applications. Still increasing requirements for the speed and precision of designing solutions, decreasing voltage levels, power consumption and aspects of EMC compatibility impose often contrary initial conditions.
Precyzyjne pomiary prądu są zasadniczą częścią nowoczesnych algorytmów sterowania silnikami. Są także stosowane w przetwornicach mocy, obwodach bezpieczeństwa, źródłach prądowych, systemach nadzoru i wielu innych aplikacjach. W celu wybrania właściwej metody projektant musi mieć szeroką wiedzę na temat odpowiedniego obwodu scalonego, jego parametrów i aplikacji. Rosnące wymagania dotyczące szybkości i precyzji projektowanych rozwiązań, obniżenie poziomów napięć, zużycie energii oraz aspekty kompatybilności elektromagnetycznej powodują często sprzeczne warunki początkowe.
Źródło:
Pomiary Automatyka Robotyka; 2017, 21, 1; 5-12
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetotransport measurements as a tool for searching 3D topological insulators
Autorzy:
Śliż, Paweł
Sankowska, Iwona
Bobko, Ewa
Szeregij, Eugeniusz
Grendysa, Jakub
Tomaka, Grzegorz
Żak, Dariusz
Płoch, Dariusz
Jasik, Agata
Powiązania:
https://bibliotekanauki.pl/articles/2052167.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
materials science
magnetotransport
topological insulators
quantum Hall effect
Opis:
The paper covers some measurement aspects of transport of electrons through metals and semiconductors in magnetic field - magnetotransport - allowing for the determination of electrical parameters characteristic of three-dimensional (3D) topological insulators (TI) (i.e. those that behave like an insulator inside their volume and have a conductive layer on their surface). A characteristic feature of the 3D TI is also a lack of differences between the chemical composition of the conductive surface and the interior of the material tested and the fact that the electron states for its surface conductivity are topologically protected. In particular, the methods of generating strong magnetic fields, obtaining low temperatures, creating electrical contacts with appropriate geometry were presented, and the measurement methods were reviewed. In addition, the results of magnetotransport measurements obtained for two volumetric samples based on the HgCdTe compound grown with the molecular beam epitaxy method are presented.
Źródło:
Metrology and Measurement Systems; 2021, 28, 4; 725-734
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of rotor position sensor fault tolerant control in electric vehicle with PM BLDC motor drives
Autorzy:
Skóra, M.
Powiązania:
https://bibliotekanauki.pl/articles/140658.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
PM BLDC motor
Hall effect sensor
fault tolerant drive
ZOA
electric vehicle
Opis:
In order to develop a PM BLDC motor control system, which will be tolerant of selected faults, simulation work was first performed and then verified on a universal test stand. The results were published in earlier works. The next stage of works was the implementation of previously developed algorithms on the target research test stand – in this case, the prototype vehicle. This last stage of the laboratory work has been presented in this article, i.e. it has been presented the results of experimental research related to the reproduction of rotor angle position, used after the detection of a rotor position sensor fault. A new test stand with the laboratory prototype of a vehicle with two PM BLDC motors is presented. A zeroth-order algorithm (ZOA) was used as a fault compensation method. The effectiveness and usefulness of the previously proposed methods have been confirmed.
Źródło:
Archives of Electrical Engineering; 2018, 67, 4; 725-738
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hall effect on thermal instability of viscoelastic dusty fluid in porous medium
Autorzy:
Singh, M.
Gupta, R. K.
Powiązania:
https://bibliotekanauki.pl/articles/265280.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
niestabilność termiczna
płyn lepkosprężysty
porowatość
thermal instability
Rivlin-Ericksen viscoelastic fluid
suspended particles
Hall current effect
porous medium
Opis:
The effect of Hall currents and suspended dusty particles on the hydromagnetic stability of a compressible, electrically conducting Rivlin-Ericksen elastico viscous fluid in a porous medium is considered. Following the linearized stability theory and normal mode analysis the dispersion relation is obtained. For the case of stationary convection, Hall currents and suspended particles are found to have destabilizing effects whereas compressibility and magnetic field have stabilizing effects on the system. The medium permeability, however, has stabilizing and destabilizing effects on thermal instability in contrast to its destabilizing effect in the absence of the magnetic field. The critical Rayleigh numbers and the wave numbers of the associated disturbances for the onset of instability as stationary convection are obtained and the behavior of various parameters on critical thermal Rayleigh numbers are depicted graphically. The magnetic field, Hall currents and viscoelasticity parameter are found to introduce oscillatory modes in the systems, which did not exist in the absence of these parameters.
Źródło:
International Journal of Applied Mechanics and Engineering; 2013, 18, 3; 871-886
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electroplastic deformation by twinningmetals
Autorzy:
Savenko, V. V.
Powiązania:
https://bibliotekanauki.pl/articles/386875.pdf
Data publikacji:
2018
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
electroplastic deformation
ponderomotive action current
pinch effect
skin effect
pulse current
magnetic field
electric field vortex field hall
mechanical pressure
maximum axial force
Opis:
The article deals with theoretical and experimental approaches to electroplastic deformation caused by twinning of metals. The author specifies physical fundamentals of Kinetics regarding the development of twinning caused by the excitation of electronic subsystem of metals. Physical models of new channels for the realization of twinning aroused under conditions of electroplasticity have been discussed. Mechanisms of plasticized influence of a surface electric charge have been defined as well as the contribution of a dynamic pinch-effect in the elastic plastic deformation of metals with the participation of the intrinsic magnetic field of the current. The dynamic pinch effect creates ultrasonic vibration of the lattice system while Kinetics changes and plastic deformation are stimulated increasing the amplitude of the oscillations of rectilinear dislocations and the periodic change in the position of the dislocation loops with an increase in the probability of detachment of dislocations from the stoppers. When deformed above the yield point and due to the pinch effect the intrinsic magnetic field of the current diffuses into the crystal where the diffusion rate depends both on the conductivity of the metal and on the frequency of the current. It is necessary to take into account the physical conditions for the creation of ponderomotive effects in relation to specific technically important materials for the practical use of electroplastic deformation technology, especially when processing metals with pressure.
Źródło:
Acta Mechanica et Automatica; 2018, 12, 4; 259-264
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Hall effect on MHD 2-fluid unsteady heat transfer flow of plasma in a rotating system via a straight channel between conducting plates
Autorzy:
Raju, T. Linga
Rao, B. Venkata
Powiązania:
https://bibliotekanauki.pl/articles/2174207.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
wymiana ciepła
efekt Halla
plazma
unsteady flow
MHD
immiscible flow
heat transfer
Hall effect
plasma
rotating frame
conducting plate
Opis:
Hall currents are used to investigate MHD unsteady two fluid flows and heat transport of plasma along a straight channel of conducting plates. In the two liquid zones, the velocity and temperature fields for the case of conducting side plates are obtained by solving the governing equations using a two-term series under the specified conditions. The distribution profiles are graphically resolved and examined. The distributions are thought to be dependent on the electron-to-total pressure ratio. The flow and heat transfer factors are also influenced by other parameters such as the Hartmann number, Hall parameter, rotation parameter, thermal conductivity and viscosity ratio.
Źródło:
International Journal of Applied Mechanics and Engineering; 2022, 27, 3; 137--162
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unsteady electro-magneto hydrodynamic flow and heat transfer of two ionized fluids in a rotating system with Hall currents
Autorzy:
Raju, T. Linga
Rao, B. Venkat
Powiązania:
https://bibliotekanauki.pl/articles/2174167.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
transfer ciepła
przepływ nieustalony
plazma
pole magnetyczne
pole elektryczne
unsteady flow
magnetic field
electric field
immiscible flow
plasma
Hall effect
rotating frame
heat transfer
insulating plate
Opis:
An unsteady flow and heat transmission of ionized gases via a horizontal channel enclosed by non-conducting plates in a rotating framework with Hall currents is examined using electro-magnetohydrodynamic (EMHD) two-fluid heat flow. The Hall current impact is taken into account by assuming that the gases are totally ionized, the applied transverse magnetic field is very strong. For temperature and velocity distributions in two-fluid flow regions, the governing equations are solved analytically. For numerous physical parameters such as the Hartmann number, Hall parameter, rotation parameter, viscosity ratio, and so on, numerical solutions are visually displayed. It was discovered that an increase in temperature in the two regions is caused by the thermal conductivity ratio. It was also realized that an increase in rate of heat transfer coefficient at the plates is caused by either the Hartman number or the Hall parameter.
Źródło:
International Journal of Applied Mechanics and Engineering; 2022, 27, 1; 125--145
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Peculiarities of quantum magnetotransport in In₀.₅₃Ga₀.₄₇As/In₀.₅₂Al₀.₄₈As heterostructures grown on (100) InP
Autorzy:
Przesławski, T.
Powiązania:
https://bibliotekanauki.pl/articles/378451.pdf
Data publikacji:
2007
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Elektronowej
Tematy:
magnetotransport
efekt Halla
hel
Hall effect
helium
Opis:
Magnetotransport properties of the Si δ- doped In₀.₅₃Ga₀.₄₇As/In₀.₅₂Al₀.₄₈As heterostructures grown on (100)InP substrates were investigated by performing classical Van der Pauw Hall effect as well as high field quantum magnetotransport measurements. The results of the conventional Hall measurements are ambiguous because the mobility obtained at liquid helium occurred to be smaller than at room temperature. The qualitative analysis of the conductivity tensor revealed at least two conducting channels. Thus, the properties of whole structure are limited by the low mobility of the parasitic parallel conduction layer. On the other hand, the fast Fourier transform of the quantum magnetooscillations consists of a lot of frequencies. None of them can not be attributed to the presence of the two-dimensional electron gas (2DEG) in a single quantum well. We interpret our rich Fourier spectrum as due to quantum interference (QI) between open electron path commonly found in superlattices structures.
Źródło:
Electron Technology : Internet Journal; 2007, 39, 2; 1-3
1897-2381
Pojawia się w:
Electron Technology : Internet Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hall effect sensors performance investigation using three-dimensional simulations
Autorzy:
Paun, M.-A.
Sallese, J.-M.
Kayal, M.
Powiązania:
https://bibliotekanauki.pl/articles/398136.pdf
Data publikacji:
2011
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
hallotron
wygładzanie numeryczne
symulacja fizyczna
symulacja 3D
hall effect sensor
numerical offset
numerical drift
3D physical simulations
Opis:
Several Hall effect sensors were modeled and evaluated regarding the Hall voltage and sensitivity using 3D physical simulations. For accurate results the numerical offset and its temperature drift were analyzed. The versatility of the simulation allows various Hall sensor implementations. The simulation procedure could guide the designer in choosing the Hall cell optimum fabrication process, shape and dimensions in terms of the performances envisaged to be achieved.
Źródło:
International Journal of Microelectronics and Computer Science; 2011, 2, 4; 140-145
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Offset Drift Dependence of Hall Cells with their Designed Geometry
Autorzy:
Paun, M. A.
Sallese, J. M.
Kayal, M.
Powiązania:
https://bibliotekanauki.pl/articles/226531.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hall effect sensor
individual and residual offset drift
temperature coefficient
Opis:
In this paper, the performance of CMOS Hall Effect Sensors with four different geometries has been experimentally studied. Using a characteristic measurement system, the cells residual offset and its temperature behavior were determined. The offset, offset drift and sensitivity are quantities that were computed to determine the sensors performance. The temperature coefficient of specific parameters such as individual, residua offset and resistance has been also investigated. Therefore the optimum cell to fit the best in the performance specifications was identified. The variety of tested shapes ensures a good analysis on how the sensors performance changes with geometry.
Źródło:
International Journal of Electronics and Telecommunications; 2013, 59, 2; 169-175
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature error of Hall-effect and magnetoresistive commercial magnetometers
Autorzy:
Nowicki, M.
Kachniarz, M.
Szewczyk, R.
Powiązania:
https://bibliotekanauki.pl/articles/141287.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
magnetic field measurement
magnetometers
Hall-effect
magnetoresistive
temperature error
Opis:
The paper presents a special measurement system for investigation of temperature influence on the indication of commercially available sensors of the magnetic field. Utilizing the developed system, several magnetoresistive and Hall-effect sensors were investigated within the temperature range from –30°C to 70°C. The obtained results indicate that sensitivity of most of the investigated sensors is unaffected, except the basic magnetoresistive device. However, Hall-effect sensors exhibit considerable temperature drift, regardless of the manufacturer.
Źródło:
Archives of Electrical Engineering; 2017, 66, 3; 625-630
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hallotron sensor system for control of robotized total station operations to monitor movements of building structures
Hallotronowy system czujników sterujących pracą tachimetrów zrobotyzowanych do monitorowania przemieszczeń budowli
Autorzy:
Mirek, G.
Lenda, G.
Kocierz, R.
Powiązania:
https://bibliotekanauki.pl/articles/385528.pdf
Data publikacji:
2010
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
hallotron
czujnik przemieszczeń
tachimetr zrobotyzowany
hall effect sensor
displacement sensor
robotized total station
measuring system
Opis:
The paper presents a measuring system designed to monitor displacements and deformation of engineering structures. The main concept of the system is a control of ATR type robotized total station operation by specially designed sensors operating on the base of Hall effect and denoting the displacements occurring within the tested object in real time. This allows to quickly detect existing deformations and taking appropriate countermeasures, what is particularly important, e.g. at structure test loading. A specific electronic module of hallotron sensors was designed and built to be utilized within the system. A suitable system control software was also prepared, in order to facilitate the communication of sensors with a computer.
Praca prezentuje system pomiarowy przeznaczony do monitorowania przemieszczeń i odkształceń obiektów inżynierskich. Istotą systemu jest sterowanie pracą zrobotyzowanych tachimetrów typu ATR za pomocą specjalnie zaprojektowanych czujników, których działanie opiera się na zjawisku Halla, rejestrujących zachodzące przemieszczenia na badanym obiekcie w czasie rzeczywistym. Pozwala to na szybkie wykrycie powstających deformacji i przedsięwzięcie środków zaradczych, co może mieć szczególne znaczenie np. przy próbnych obciążeniach. Na potrzeby systemu został zaprojektowany oraz skonstruowany specjalny elektroniczny moduł czujników hallotronowych. Przygotowano również odpowiednie oprogramowanie sterujące systemu, umożliwiające komunikację czujników z komputerem.
Źródło:
Geomatics and Environmental Engineering; 2010, 4, 2; 89-99
1898-1135
Pojawia się w:
Geomatics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Integracja precyzyjnych dylatometrów hallotronowych oraz tachimetrów zrobotyzowanych dla ciągłego monitorowania przemieszczeń budowli
Integration of precise Hall-effect dilatometers and robotized total stations for continuous monitoring of displacements of buildings
Autorzy:
Mirek, G.
Lenda, G.
Powiązania:
https://bibliotekanauki.pl/articles/156441.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
hallotron
czujnik
dylatometr
tachimetr zrobotyzowany
hall effect sensor
sensor
dilatometer
robotised total station
Opis:
Opracowanie przedstawia propozycję systemu pomiarowego służącego do ciągłego monitorowania przemieszczeń obiektów budowlanych. W jego skład wchodzi zespół dylatometrów hallotronowych wykonujących pomiary względne, sterujących równocześnie pracą tachimetrów zrobotyzowanych wykonujących automatyczne obserwacje do ustalonych na obiekcie punktów. Realizowana jest w ten sposób synchronizacja czasowa pomiarów względnych oraz bezwzględnych. Pomiary tachimetryczne wykonywane są w momencie zarejestrowania przemieszczeń względnych o określonej wartości. Wyniki tych obserwacji w połączeniu z danymi z dylatometrów pozwalają zinwentaryzować stan obiektu w chwili zmian zaistniałych w jego strukturze. W opracowaniu opisano budowę oraz metodę kalibracji dylatometrów hallotronowych, jak również sposób konwersji sygnałów na postać cyfrową, umożliwiającą rejestrację pomiarów i sterowanie pracą tachimetrów. Zaprezentowano również wyniki testów dokładnościowych dla wykonanych dylatometrów.
The idea of the proposed measuring system is to synchronise robotised tacheometric measurements of an object with the existing relative displacements detected by a dilatometer. The system consists of a set of dilatometers, a robotised total station featuring ATR (automatic target recognition) and a dedicated software (Fig. 1). The software and a dilatometer were specially designed and built for the proposed system. The latter one uses Hall-effect sensors and magnets to detect and measure displacements (Fig. 5). Their output voltage is converted into digital signals and transmitted to a computer in which the displacement value is calculated by the software on the basis of the displacement-to-voltage characteristics (Fig. 7). They are precisely determined for each dilatometer during the calibration process, with help of splines, which is essential to ensure the high accuracy of measurements. The prototype of a dilatometer and its principle of operation are described in Subsections 2.1 and 2.2, while the calibration process is presented in Subsection 2.3. The dilatometers were subjected to laboratory tests to trial their operation and determine their accuracy. The results are given in Subsection 2.5. The dilatometers, apart from measuring the relative displacements, are also responsible for triggering the tacheometric measurement of object control points in ATR mode. Such a measurement is started up after exceeding the preset threshold values of displacement (Subsection 2.6). In this way the time synchronization of the relative and absolute measurements is achieved, allowing better assessment of the object deformation than in the case of measurements taken independently.
Źródło:
Pomiary Automatyka Kontrola; 2011, R. 57, nr 1, 1; 77-81
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł

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