Informacja

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

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Hall effect" wg kryterium: Wszystkie pola

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 63
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:
Composite Fermions and the Fractional Quantum Hall Effect
Autorzy:
Wójs, A.
Quinn, J. J.
Powiązania:
https://bibliotekanauki.pl/articles/2011133.pdf
Data publikacji:
1999-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.10.Pm
73.20.Dx
73.40.Hm
Opis:
The mean field composite fermion picture successfully predicts low lying states of fractional quantum Hall systems. This success cannot be attributed to a cancellation between the Coulomb and Chern-Simons interactions beyond the mean field and solely depends on the short-range of the Coulomb pseudopotential in the lowest Landau level. The class of pseudopotentials for which the mean field composite fermion picture can be applied is defined. The success or failure of the mean field composite fermion picture in various systems (electrons in excited Landau levels, Laughlin quasiparticles, charged magnetoexcitons) is explained.
Źródło:
Acta Physica Polonica A; 1999, 96, 5; 593-602
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Planar Hall Effect in Ferromagnetic (Ga,Mn)As/GaAs Superlattices
Autorzy:
Wesela, W.
Wosiński, T.
Mąkosa, A.
Figielski, T.
Sadowski, J.
Terki, F.
Charar, S.
Powiązania:
https://bibliotekanauki.pl/articles/2047701.pdf
Data publikacji:
2007-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.50.Jt
75.50.Pp
75.30.Gw
85.75.-d
Opis:
The planar Hall effect was used for investigation of magnetic anisotropy in short period (Ga,Mn)As/GaAs superlattices epitaxially grown on (001) oriented GaAs substrate. The results confirmed the existence of low-temperature magnetocrystalline anisotropy in the superlattices with the easy magnetic axes directed along the two in-plane 〈100〉 directions. Attention is paid to the two-state behaviour of the planar Hall resistance at zero magnetic field that provides its usefulness for applications in non-volatile memory devices.
Źródło:
Acta Physica Polonica A; 2007, 112, 2; 369-373
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Disorder on Spin and Charge Excitations in the Fractional Quantum Hall Effect
Autorzy:
Výborný, K.
Müller, Ch.
Dethlefsen, A. F.
Haug, R. J.
Wójs, A.
Powiązania:
https://bibliotekanauki.pl/articles/2047400.pdf
Data publikacji:
2007-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.43.-f
75.10.Jm
72.10.Fk
73.63.-b
Opis:
A simple model of disorder in fractional quantum Hall systems is combined with the standard exact diagonalisation technique. Electron-density-dependent gaps at filling factors 1/3,2/3,2/5, and 3/5 measured by activated transport can then be fitted with a single reasonable value of d which has the meaning of the separation of ionized donors from the quasi-2D electron gas.
Źródło:
Acta Physica Polonica A; 2007, 112, 2; 249-254
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
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:
Thermal stability of the krypton Hall effect thruster
Autorzy:
Szelecka, A.
Kurzyna, J.
Bourdain, L.
Powiązania:
https://bibliotekanauki.pl/articles/148243.pdf
Data publikacji:
2017
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
thermal stability
electric propulsion
Hall thruster
xenon
krypton propellants
Opis:
The Krypton Large IMpulse Thruster (KLIMT) ESA/PECS project, which has been implemented in the Institute of Plasma Physics and Laser Microfusion (IPPLM) and now is approaching its final phase, was aimed at incremental development of a ~500 W class Hall effect thruster (HET). Xenon, predominantly used as a propellant in the state-of-the-art HETs, is extremely expensive. Krypton has been considered as a cheaper alternative since more than fifteen years; however, to the best knowledge of the authors, there has not been a HET model especially designed for this noble gas. To address this issue, KLIMT has been geared towards operation primarily with krypton. During the project, three subsequent prototype versions of the thruster were designed, manufactured and tested, aimed at gradual improvement of each next exemplar. In the current paper, the heat loads in new engine have been discussed. It has been shown that thermal equilibrium of the thruster is gained within the safety limits of the materials used. Extensive testing with both gases was performed to compare KLIMT’s thermal behaviour when supplied with krypton and xenon propellants.
Źródło:
Nukleonika; 2017, 62, 1; 9-15
0029-5922
1508-5791
Pojawia się w:
Nukleonika
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:
Quantum Spin Hall Effect in Strained (111)-Oriented SnSe Layers
Autorzy:
Safaei, S.
Galicka, M.
Kacman, P.
Buczko, R.
Powiązania:
https://bibliotekanauki.pl/articles/1398549.pdf
Data publikacji:
2016-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.55.jd
71.20.-b
73.20.-r
Opis:
Recently, the quantum spin Hall effect has been predicted in (111)-oriented thin films of SnSe and SnTe topological crystalline insulators. It was shown that in these films the energy gaps in the two-dimensional band spectrum depend in an oscillat ory fashion on the layer thickness - the calculated topological invariant indexes and edge state spin polarizations show that for films 20-40 monolayers thick a two-dimensional topological insulator phase appears. Edge states with the Dirac cones with opposite spin polarization in their two branches are obtained for both materials. However, for all but the (111)-oriented SnTe films with an even number of monolayers an overlapping of bands in Γ̅ and M̅ diminishes the final band gap and the edge states appear either against the background of the bands or within a very small energy gap. Here we show that this problem in SnSe films can be removed by applying an appropriate strain. This should enable observation of the quantum spin Hall effect also in SnSe layers.
Źródło:
Acta Physica Polonica A; 2016, 129, 1a; A-150-A-152
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Hall currents on unsteady magnetohydrodynamic two-ionized fluid flow and heat transfer in a channel
Autorzy:
Raju, T. Linga
Rao, V. Gowrisankara
Powiązania:
https://bibliotekanauki.pl/articles/1839879.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
czujnik Halla
wymiana ciepła
magnetohydrodynamika
Hall currents
heat transfer
magnetohydrodynamics
multi-fluid model
plasma flows
Opis:
An unsteady magnetohydrodynamic (MHD) heat transfer two-fluid flow of ionized gases through a horizontal channel between parallel non-conducting plates, by taking Hall currents into account is studied. The governing partial differential equations that describe the flow and heat transfer under the adopted conditions are solved for the velocity and temperature distributions by a regular perturbation technique. Profiles for the velocity and temperature distributions as well the rates of heat transfer coefficient are presented graphically, and a parametric study is performed. The results reveal that the combined effects of the Hartmann number, Hall parameter, and the ratios of viscosities, heights, electrical and thermal conductivities have a significant impact on an unsteady MHD heat transfer two-ionized fluid flow characteristics.
Źródło:
International Journal of Applied Mechanics and Engineering; 2021, 26, 2; 84-106
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
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
Wyświetlanie 1-15 z 63

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