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Статті в журналах з теми "Variable magnetic field"

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Автор: Grafiati

Опубліковано: 22 жовтня 2022

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1

Jaafar, M., J. Gómez-Herrero, A. Gil, P. Ares, M. Vázquez, and A. Asenjo. "Variable-field magnetic force microscopy." Ultramicroscopy 109, no. 6 (May 2009): 693–99. http://dx.doi.org/10.1016/j.ultramic.2009.01.007.

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2

Mohanty, J., R. Engel-Herbert, and T. Hesjedal. "Variable magnetic field and temperature magnetic force microscopy." Applied Physics A 81, no. 7 (November 2005): 1359–62. http://dx.doi.org/10.1007/s00339-005-3277-2.

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3

Shuaib, Muhammad, Rehan Ali Shah, and Muhammad Bilal. "Von-Karman rotating flow in variable magnetic field with variable physical properties." Advances in Mechanical Engineering 13, no. 2 (February 2021): 168781402199046. http://dx.doi.org/10.1177/1687814021990463.

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The steady incompressible slip flow with convective heat transport under the impact of a variable magnetic field has been taken into an account over a revolving disk. The temperature dependent viscosity, density, and thermal conductivity has been scrutinized. The obtained system of nonlinear differential equations governing the induced magnetic field, steady flow, and heat transmission has put down in polar cylindrical coordinates. The subsequent arrangement of nonlinear PDEs are subside into dimensionless system of ordinary equations, while making use of similarity abstraction. The modeled equations are tackled through Homotopy Analysis Method (HAM). The skin fraction coefficient, heat transmission rate, and Nusselt number (skin effects coefficient) are deliberated. From the results, It can be perceived that the slip factor effectively controls the heat and the flow characteristics. The influence of dimensionless numbers such as Batcheler number [Formula: see text] and magnetic strength [Formula: see text] and [Formula: see text] are explored and shown graphically. Further the out-turn of Prandtl number, relative temperature difference, suction parameter, and slip factor on the temperature fields and velocity profile are discussed.

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4

Kichigin, G. N. "Plasma heating in a variable magnetic field." Plasma Physics Reports 39, no. 5 (May 2013): 406–11. http://dx.doi.org/10.1134/s1063780x13050073.

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5

Tyrała, Edward. "Phase Composition Using a Variable Magnetic Field." ISIJ International 54, no. 3 (2014): 700–703. http://dx.doi.org/10.2355/isijinternational.54.700.

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6

Петухова, Анастасия, Anastasia Petukhova, Станислав Петухов, and Stanislav Petukhov. "Toroidal models of magnetic field with twisted structure." Solar-Terrestrial Physics 5, no. 2 (June 28, 2019): 69–75. http://dx.doi.org/10.12737/stp-52201910.

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We present and discuss properties of the following magnetic field models in a magnetic cloud: Miller and Turner solution, modified Miller–Turner solution, Romashets–Vandas toroidal and integral models, and Krittinatham–Ruffolo model. Helicity of the magnetic field in all the models is the main feature of magnetic clouds. The first three models describe the magnetic field inside an ideal torus. In the integral model, parameters of a generating torus ambiguously determine the volume and form of the magnetic field region. In the Krittinatham–Ruffolo model, the cross-section radius of the torus is variable, thereby it corresponds more closely to the real form of magnetic clouds in the inner heliosphere. These models can be used to interpret in-situ observations of the magnetic flux rope, to study a Forbush decrease in magnetic clouds and transport effects of solar energetic particles injected into a coronal mass ejection.

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7

Ma, Hui, Jianhua Wang, Zhiyuan Liu, Yingsan Geng, Zhenxing Wang, and Jing Yan. "Vacuum arcing behavior between transverse magnetic field contacts subjected to variable axial magnetic field." Physics of Plasmas 23, no. 6 (June 2016): 063517. http://dx.doi.org/10.1063/1.4954301.

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8

Patel, A. D., M. Sharma, N. Ramasubramanian, R. Ganesh, and P. K. Chattopadhyay. "A new multi-line cusp magnetic field plasma device (MPD) with variable magnetic field." Review of Scientific Instruments 89, no. 4 (April 2018): 043510. http://dx.doi.org/10.1063/1.5007142.

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9

Rossi, Giorgio, Giancarlo Panaccione, Fausto Sirotti, and Nikolai A. Cherepkov. "Magnetic-field-averaged photoemission experiments with variable chirality." Physical Review B 55, no. 17 (May 1, 1997): 11483–87. http://dx.doi.org/10.1103/physrevb.55.11483.

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10

Hudson, E. D., J. A. Martin, and R. S. Lord. "A Variable Field Magnetic Extraction Channel for ORIC." IEEE Transactions on Nuclear Science 32, no. 5 (October 1985): 3030–32. http://dx.doi.org/10.1109/tns.1985.4334264.

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11

Prieto, J. L., C. Aroca, E. López, M. C. Sánchez, and P. Sánchez. "Spectral estimate of a time variable magnetic field." Journal of Magnetism and Magnetic Materials 157-158 (May 1996): 449–50. http://dx.doi.org/10.1016/0304-8853(95)01188-9.

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12

Callicott, C. "A magnetic field control system for a variable field NMR spectrometer." Physics in Medicine and Biology 44, no. 9 (August 17, 1999): N193—N199. http://dx.doi.org/10.1088/0031-9155/44/9/401.

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13

Gladkikh, D. V., and Yu I. Dikanskij. "Interaction of a droplet magnetic fluid with a variable magnetic field." Technical Physics 51, no. 8 (August 2006): 976–80. http://dx.doi.org/10.1134/s1063784206080032.

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14

Rashid, A., Kamran Yousaf, and Zeeshan Ali. "Theory of Permanent Magnetic Motion and Variable Field Permanent Magnetic Motor." Arabian Journal for Science and Engineering 38, no. 10 (December 19, 2012): 2755–64. http://dx.doi.org/10.1007/s13369-012-0485-x.

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15

Tarasewicz, Z., D. Szczerbinska, D. Majewska, A. Danczak, M. Ligocki, and A. Wolska. "The effect of magnetic field on hatchability of Japanese quail eggs." Czech Journal of Animal Science 51, No. 8 (December 5, 2011): 355–60. http://dx.doi.org/10.17221/3951-cjas.

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The effect of environmental conditions on hatching indices of poultry eggs is sufficiently important that new methods for their improvement are sought, among others through exposing the eggs during hatching to an artificially generated magnetic field of variable frequency. Hatching eggs in this study came from Pharaoh quail in the 4th month of laying. The flock was kept under optimum microclimate conditions and fed a complete feed mix containing 21% total protein and 11.7 MJ ME. The eggs (n = 150), after weighing, were divided into 3 groups equal in respect of numbers: control (I) and two experimental (II and III). The eggs of group II and III were exposed to the action of variable magnetic field of the same intensity but different times of application. The highest percentage of dead embryos during incubation in relation to fertilised eggs was found in control group (11.36%), while the smallest was from group II (4.17%). The highest value of hatching indices calculated in relation to fertilised eggs was found in group II (91.6%), while the smallest was in group III (83.7%) with 86.3% in control group. The results point to the possibility of increasing egg hatchability indices through the use of additional variable magnetic field. The chicks hatched from eggs exposed to the action of this experimental agent had similar body weight. The average weight of one-day-old chicks ranged from 7.82 g (group II) to 8.05 g (group III). In the last week of rearing, mean body weight in both sexes was similar and ranged from 168 (group I) to 172 g (group III) in males, and from 186 g (group I) to 199 g (group III) in females; these differences were not statistically significant. The females of group III reached sexual maturity at 41 days, this being one and three days (non-significantly) earlier than birds in group I and II.  

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16

Verma, Mahendra, Manohar Sharma, Soumyadeep Chatterjee, and Shadab Alam. "Variable Energy Fluxes and Exact Relations in Magnetohydrodynamics Turbulence." Fluids 6, no. 6 (June 15, 2021): 225. http://dx.doi.org/10.3390/fluids6060225.

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In magnetohydrodynamics (MHD), there is a transfer of energy from the velocity field to the magnetic field in the inertial range itself. As a result, the inertial-range energy fluxes of velocity and magnetic fields exhibit significant variations. Still, these variable energy fluxes satisfy several exact relations due to conservation of energy. In this paper, using numerical simulations, we quantify the variable energy fluxes of MHD turbulence, as well as verify several exact relations. We also study the energy fluxes of Elsässer variables that are constant in the inertial range.

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17

Gray, Сandace, and Paul A. Mason. "A VLA Survey of Magnetic Cataclysmic Variable Stars." International Astronomical Union Colloquium 194 (July 2004): 267. http://dx.doi.org/10.1017/s0252921100153114.

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Cataclysmic Variables (CVs) are close binaries containing a white dwarf primary and a Rochelobe filling red dwarf secondary. In magnetic CVs (MCVs) the white dwarfs have magnetic fields that are sufficiently strong (106 – 108 Gauss) to direct the accretion flow onto the surface of the primary. MCVs are divided into the lower field intermediate polars (IPs) and the higher field polars. Typically, IPs have accretion disks that are disrupted in the center and magnetically channelled flow onto the poles. Polars are diskless, an accretion stream flowing from the inner Lagrangian point impacts directly onto one or both magnetic poles. In addition, polars tend to have white dwarfs which rotate in synchronism with the binary orbit, while IPs have white dwarfs which rotate faster than the binary period. There are a few rare exceptions to this characterization, such as the slightly asynchronous polars and the stream-fed IPs.

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18

Irrgang, C., J. Saynisch, and M. Thomas. "Impact of variable sea-water conductivity on motional induction simulated with an OGCM." Ocean Science Discussions 12, no. 4 (August 19, 2015): 1869–91. http://dx.doi.org/10.5194/osd-12-1869-2015.

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Abstract. Carrying high concentrations of dissolved salt, ocean water is a good electrical conductor. As sea-water flows through the Earth's ambient geomagnetic field, electric fields are generated, which in turn induce secondary magnetic fields. In current models for oceanic induced magnetic fields, a realistic consideration of sea-water conductivity is often neglected and the effect on the variability of the oceanic induced magnetic field unknown. To model magnetic fields that are induced by non-tidal global ocean currents, an electromagnetic induction model is implemented into the Ocean Model for Circulation and Tides (OMCT). This provides the opportunity to not only model oceanic induced magnetic signals, but to assess the impact of oceanographic phenomena on the induction process. In this paper, the sensitivity of the induction process due to spatial and temporal variations in sea-water conductivity is investigated. It is shown that assuming an ocean-wide uniform conductivity is insufficient to accurately capture the temporal variability of the magnetic signal. Using instead a realistic global sea-water conductivity distribution increases the temporal variability of the magnetic field up to 45 %. Especially vertical gradients in sea-water conductivity prove to be a key factor for the variability of the oceanic induced magnetic field. However, temporal variations of sea-water conductivity only marginally affect the magnetic signal.

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19

Ferrario, Lilia, Dayal T. Wickramasinghe, Jeremy Bailey, and David Buckley. "The Magnetic Field of 1H1752+08." Publications of the Astronomical Society of Australia 12, no. 1 (April 1995): 66–70. http://dx.doi.org/10.1017/s1323358000020051.

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AbstractWe present spectropolarimetric observations of the eclipsing cataclysmic variable 1H1752+08. Modelling of the line intensity and polarisation spectra of 1H1752+08 shows that the magnetic field structure of the white dwarf is off-centre and the mean photospheric field strength is about 7 MG, the lowest measured in a cataclysmic variable (CV). We argue that 1H1752+08 is most probably a low-field AM Herculis system.

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20

ZORA, ANNA, CONSTANTINOS SIMSERIDES, and GEORGIOS TRIBERIS. "NEAR FIELD SPECTROSCOPY OF QUANTUM DOTS UNDER MAGNETIC FIELD." International Journal of Modern Physics B 18, no. 27n29 (November 30, 2004): 3717–21. http://dx.doi.org/10.1142/s0217979204027347.

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We present the basic steps for the study of the linear near field absorption spectra of semiconductor quantum dots under magnetic field of variable orientation. We show that the application of the magnetic field alone is sufficient to induce -increasing the spot illuminated by the near field probe- interesting features to the absorption spectra.

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21

Tanaka, Takashi, Yuichiro Kida, Ryota Kinjo, Tadashi Togashi, Hiromitsu Tomizawa, Satoshi Hashimoto, Shuji Miyamoto, Sumiyuki Okabe, and Yoshihito Tanaka. "Development of an undulator with a variable magnetic field profile." Journal of Synchrotron Radiation 28, no. 2 (February 10, 2021): 404–9. http://dx.doi.org/10.1107/s1600577521000989.

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An undulator generating a magnetic field whose longitudinal profile is arbitrarily varied has been developed, which is one of the key components in a number of proposed new concepts in free-electron lasers. The undulator is composed of magnet modules, each of which corresponds to a single undulator period, and is driven by a linear actuator to change the magnetic gap independently. To relax the requirement on the actuator, the mechanical load on each module due to magnetic force acting from opponent and adjacent modules is reduced by means of two kinds of spring systems. The performance of the constructed undulator has been successfully demonstrated by magnetic measurement and characterization of synchrotron radiation.

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22

Ream, Jodie B., Benjamin P. Weiss, Rona Oran, Carol A. Raymond, Carol A. Polanskey, Daniel D. Wenkert, Linda T. Elkins-Tanton, Richard A. Hart, Christopher T. Russell, and Jose M. G. Merayo. "Magnetic gradiometry using frequency-domain filtering." Measurement Science and Technology 33, no. 1 (November 2, 2021): 015104. http://dx.doi.org/10.1088/1361-6501/ac2e2e.

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Abstract Accurate measurements of ambient planetary and interplanetary magnetic fields using spacecraft magnetometers typically require accounting for interfering magnetic fields generated by the flight system (FS). The most common method for removing FS-generated time-variable magnetic fields is narrow-band and low-pass filtering of magnetic field data in the frequency domain. However, if fluctuations in the ambient field contain frequencies overlapping those in the FS field, it can be difficult to construct a filter that will not affect both signals. Here we present an alternate method for removing FS time-variable signatures from magnetic field measurements. For spacecraft that make use of a magnetic gradiometer (i.e. with two or more instruments on a boom at different distances from the center of the spacecraft), the dominant frequencies in the FS field can be identified using spectra of the differenced field components. The amplitudes of the FS field at those frequencies can then be suppressed without removing spectral peaks present in the ambient field. We demonstrate the successful application of this method, referred to as gradiometry peak suppression, both to modeled data sets and to 128 Hz Venus Express magnetometer data.

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23

Marinov, Michael S., and Eugene Strahov. "Spin in a variable magnetic field: the adiabatic approximation." Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy 327, no. 2-3 (February 1999): 245–49. http://dx.doi.org/10.1016/s1287-4620(99)80063-5.

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24

Tretiak, Oleg, Peter Blümler, and Lykourgos Bougas. "Variable single-axis magnetic-field generator using permanent magnets." AIP Advances 9, no. 11 (November 1, 2019): 115312. http://dx.doi.org/10.1063/1.5130896.

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25

Levchenko, V. F., and Z. G. Andguladze. "Production of metal powders in a variable magnetic field." Soviet Powder Metallurgy and Metal Ceramics 27, no. 8 (August 1988): 593–96. http://dx.doi.org/10.1007/bf00795540.

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26

Brainerd, J. J. "Cyclotron emission from AM Herculis binaries - A variable magnetic field, variable temperature model." Astrophysical Journal 345 (October 1989): 978. http://dx.doi.org/10.1086/167967.

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27

Irrgang, C., J. Saynisch, and M. Thomas. "Impact of variable seawater conductivity on motional induction simulated with an ocean general circulation model." Ocean Science 12, no. 1 (January 15, 2016): 129–36. http://dx.doi.org/10.5194/os-12-129-2016.

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Анотація:

Abstract. Carrying high concentrations of dissolved salt, ocean water is a good electrical conductor. As seawater flows through the Earth's ambient geomagnetic field, electric fields are generated, which in turn induce secondary magnetic fields. In current models for ocean-induced magnetic fields, a realistic consideration of seawater conductivity is often neglected and the effect on the variability of the ocean-induced magnetic field unknown. To model magnetic fields that are induced by non-tidal global ocean currents, an electromagnetic induction model is implemented into the Ocean Model for Circulation and Tides (OMCT). This provides the opportunity to not only model ocean-induced magnetic signals but also to assess the impact of oceanographic phenomena on the induction process. In this paper, the sensitivity of the induction process due to spatial and temporal variations in seawater conductivity is investigated. It is shown that assuming an ocean-wide uniform conductivity is insufficient to accurately capture the temporal variability of the magnetic signal. Using instead a realistic global seawater conductivity distribution increases the temporal variability of the magnetic field up to 45 %. Especially vertical gradients in seawater conductivity prove to be a key factor for the variability of the ocean-induced magnetic field. However, temporal variations of seawater conductivity only marginally affect the magnetic signal.

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28

Rosén, Lisa, Oleg Kochukhov, and Gregg A. Wade. "Strong variable linear polarization in the cool active star II Peg." Proceedings of the International Astronomical Union 9, S302 (August 2013): 369–72. http://dx.doi.org/10.1017/s1743921314002518.

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AbstractMagnetic fields of cool active stars are currently studied polarimetrically using only circular polarization observations. This provides limited information about the magnetic field geometry since circular polarization is only sensitive to the line-of-sight component of the magnetic field. Reconstructions of the magnetic field topology will therefore not be completely trustworthy when only circular polarization is used. On the other hand, linear polarization is sensitive to the transverse component of the magnetic field. By including linear polarization in the reconstruction the quality of the reconstructed magnetic map is dramatically improved. For that reason, we wanted to identify cool stars for which linear polarization could be detected at a level sufficient for magnetic imaging. Four active RS CVn binaries, II Peg, HR 1099, IM Peg, and σ Gem were observed with the ESPaDOnS spectropolarimeter at the Canada-France-Hawaii Telescope. Mean polarization profiles in all four Stokes parameters were derived using the multi-line technique of least-squares deconvolution (LSD). Not only was linear polarization successfully detected in all four stars in at least one observation, but also, II Peg showed an extraordinarily strong linear polarization signature throughout all observations. This qualifies II Peg as the first promising target for magnetic Doppler imaging in all four Stokes parameters and, at the same time, suggests that other such targets can possibly be identified.

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29

Fan, Zhenquan, Xiaoyu Wang, Zijin Wang, Sijia Gao, and Sheng Lin. "Distributed variable stiffness joint assist mechanism based on laminated structure." International Journal of Advanced Robotic Systems 18, no. 6 (November 1, 2021): 172988142110606. http://dx.doi.org/10.1177/17298814211060661.

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Exoskeleton technology is more and more widely used in military, human rehabilitation, and other fields, but exoskeleton assisting mechanisms have problems such as high quality, concentrated driving sources, and poor flexibility. This article proposes a distributed variable stiffness joint power-assisted mechanism based on a laminated structure, which uses a giant magnetostrictive material as the driving source and the variable stiffness source of the structure. The distributed driving is realized by multiple driving units connected in series and parallel. Firstly, the drive unit stiffness matrix is deduced, and the expression equations of the cascaded total stiffness matrix of the drive module are obtained. After the simulation study, the curve of the stiffness of a single drive unit with a magnetic field and the stiffness of multiple drive units connected in series and parallel are in the absence of the magnetic field. The change curve of the stiffness of the booster module with the number of drive units under the excitation and saturation magnetic field excitation conditions is to achieve the effect of dynamically controlling the structural stiffness of the drive unit by controlling the size of the magnetic field and to obtain a general formula through data fitting. The number of drive units required under a fixed magnetic field excitation can ensure that the error is within 5%. The research results lay the foundation for further analysis of the distributed variable stiffness joint assist technology.

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30

Harfash, A. J. "Convection in a Porous Medium with Variable Gravity Field and Magnetic Field Effects." Transport in Porous Media 103, no. 3 (March 26, 2014): 361–79. http://dx.doi.org/10.1007/s11242-014-0305-8.

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31

Mathys, G. "The He-strong star HD 96446: oblique rotator or pulsating magnetic variable?" Symposium - International Astronomical Union 162 (1994): 169–70. http://dx.doi.org/10.1017/s0074180900214782.

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Анотація:

HD 96446 is a B2p He-strong star, in which a large-scale organized magnetic field is present. From spectra recorded in both circular polarizations, various moments of this magnetic field have been repeatedly determined, among which the mean longitudinal magnetic field and the crossover. The mean longitudinal magnetic field 〈Hz〉 is the line-intensity weighted average over the visible stellar hemisphere of the line-of-sight component of the magnetic vector. The crossover, ve sin i 〈x Hz〉,is the product of the projected equatorial velocity, ve sini, and of the mean asymmetry of the longitudinal magnetic field, 〈x Hz〉. The latter is the line-intensity weighted first-order moment about the plane defined by the line of sight and the stellar rotation axis of the component of the magnetic field along the line of sight.

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32

Sandeep, N., and I. L. Animasaun. "Heat transfer in wall jet flow of magnetic-nanofluids with variable magnetic field." Alexandria Engineering Journal 56, no. 2 (June 2017): 263–69. http://dx.doi.org/10.1016/j.aej.2016.12.019.

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33

Němec, František, and Marie Kotková. "Evaluating the Accuracy of Magnetospheric Magnetic Field Models Using Cluster Spacecraft Magnetic Field Measurements." Universe 7, no. 8 (August 3, 2021): 282. http://dx.doi.org/10.3390/universe7080282.

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Анотація:

Magnetic fields in the inner magnetosphere can be obtained as vector sums of the Earth’s own internal magnetic field and magnetic fields stemming from currents flowing in the space plasma. While the Earth’s internal magnetic field is accurately described by the International Geomagnetic Reference Field (IGRF) model, the characterization of the external magnetic fields is significantly more complicated, as they are highly variable and dependent on the actual level of the geomagnetic activity. Tsyganenko family magnetic field models (T89, T96, T01, TA15B, TA15N), parameterized by the geomagnetic activity level and solar wind parameters, are often used by the involved community to describe these fields. In the present paper, we use a large dataset (2001–2018) of magnetospheric magnetic field measurements obtained by the four Cluster spacecraft to assess the accuracy of these models. We show that, while the newer models (T01, TA15B, TA15N) perform significantly better than the old ones (T89, T96), there remain some systematic deviations, in particular at larger latitudes. Moreover, we compare the locations of the min-B equator determined using the four-point Cluster spacecraft measurements with the locations determined using the magnetic field models. We demonstrate that, despite the newer models being comparatively slightly more accurate, an uncertainty of about one degree in the latitude of the min-B equator remains.

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34

Namba, Masafumi, Kenji Hiramoto, and Hideo Nakai. "Novel Variable-Field Motor with a Three-Dimensional Magnetic Circuit." IEEJ Transactions on Industry Applications 135, no. 11 (2015): 1085–90. http://dx.doi.org/10.1541/ieejias.135.1085.

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35

Suszyński, Krzysztof, Wiesław Marcol, Sebastian Szajkowski, Marita Pietrucha-Dutczak, Grzegorz Cieślar, Aleksander Sieroń, and Joanna Lewin-Kowalik. "Variable spatial magnetic field influences peripheral nerves regeneration in rats." Electromagnetic Biology and Medicine 33, no. 3 (June 19, 2013): 198–205. http://dx.doi.org/10.3109/15368378.2013.801351.

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36

Khlebnikov, A. S., N. V. Smolyakov, and S. V. Tolmachev. "Undulator scheme with variable composition of the magnetic field harmonics." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 413, no. 2-3 (August 1998): 435–39. http://dx.doi.org/10.1016/s0168-9002(98)00207-1.

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37

Sokol-Kutylovskii, O. L. "A Magneto-Modulating Meter of a Weak Variable Magnetic Field." Instruments and Experimental Techniques 62, no. 4 (August 6, 2019): 554–57. http://dx.doi.org/10.1134/s0020441219040110.

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Volovik, G. E. "Topological superfluid 3He-B in magnetic field and ising variable." JETP Letters 91, no. 4 (February 2010): 201–5. http://dx.doi.org/10.1134/s0021364010040090.

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Savchenko, A. O., and O. Ya Savchenko. "Conducting object in the presence of a variable magnetic field." Technical Physics 60, no. 7 (July 2015): 952–56. http://dx.doi.org/10.1134/s1063784215070221.

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Namba, Masafumi, Kenji Hiramoto, and Hideo Nakai. "Novel Variable-Field Machine With a Three-Dimensional Magnetic Circuit." IEEE Transactions on Industry Applications 53, no. 4 (July 2017): 3404–10. http://dx.doi.org/10.1109/tia.2017.2683440.

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Măntoiu, Marius, Radu Purice, and Serge Richard. "Positive quantization in the presence of a variable magnetic field." Journal of Mathematical Physics 52, no. 11 (November 2011): 112101. http://dx.doi.org/10.1063/1.3656253.

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Shaikh, S., A. Khan, and P. K. Bhatia. "Thermally Conducting Partially Ionized Plasma in a Variable Magnetic Field." Contributions to Plasma Physics 47, no. 3 (May 2007): 147–56. http://dx.doi.org/10.1002/ctpp.200710021.

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43

Raymond, Nicolas. "On the semiclassical 3D Neumann Laplacian with variable magnetic field." Asymptotic Analysis 68, no. 1-2 (2010): 1–40. http://dx.doi.org/10.3233/asy-2010-0978.

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Abdalla, M. Sebawe. "Charged particle in the presence of a variable magnetic field." Physical Review A 37, no. 10 (May 1, 1988): 4026–29. http://dx.doi.org/10.1103/physreva.37.4026.

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Schmidt, Gary D., Paula Szkody, Paul S. Smith, Andrew Silber, Gaghik Tovmassian, D. W. Hoard, B. T. Gansicke, and D. de Martino. "AR Ursae Majoris: The First High‐Field Magnetic Cataclysmic Variable." Astrophysical Journal 473, no. 1 (December 10, 1996): 483–93. http://dx.doi.org/10.1086/178160.

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Shaikh, S., A. Khan, and P. K. Bhatia. "Stability of thermally conducting plasma in a variable magnetic field." Astrophysics and Space Science 312, no. 1-2 (August 21, 2007): 35–40. http://dx.doi.org/10.1007/s10509-007-9609-2.

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47

Kricka, Larry J., Michael Milone, Stephen R. Master, Leslie M. Shaw, Donald S. Young, Rodellia Fontanilla, Treasa Smith, et al. "Effect of a Variable Magnetic Field on Clinical Laboratory Testing." Clinical Chemistry 55, no. 6 (June 1, 2009): 1249–50. http://dx.doi.org/10.1373/clinchem.2009.123679.

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Filleul, F., A. Caldarelli, C. Charles, R. W. Boswell, N. Rattenbury, and J. Cater. "Characterization of a new variable magnetic field linear plasma device." Physics of Plasmas 28, no. 12 (December 2021): 123514. http://dx.doi.org/10.1063/5.0070924.

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Mukhachev, Evgeniy Vladimirovich, Galina Sergeevna Belyaeva, Tatiana Vladimirovna Siretckaia, Viktor Nikolaevich Nosov, Yuliya Viktorovna Romankova, Konstantin Eduardovich Ovchinnikov, Nataliya Iurevna Sazonenko, and Andrei Olegovich Tsvetkov. "Influence of low-intensity variable magnetic field on Gastropod’s nociception." Прикладные проблемы безопасности технических и биотехнических систем, no. 2 (2019): 31–36. http://dx.doi.org/10.25960/2500-2538.2019.2.31.

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Hubrig, S., M. Schöller, A. Cikota, and S. P. Järvinen. "The search for magnetic fields in two Wolf–Rayet stars and the discovery of a variable magnetic field in WR 55." Monthly Notices of the Royal Astronomical Society: Letters 499, no. 1 (October 5, 2020): L116—L120. http://dx.doi.org/10.1093/mnrasl/slaa170.

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Анотація:

ABSTRACT Magnetic fields in Wolf–Rayet (WR) stars are not well explored, although there is indirect evidence, e.g. from spectral variability and X-ray emission, that magnetic fields should be present in these stars. Being in an advanced stage of their evolution, WR stars have lost their hydrogen envelope, but their dense winds make the stellar core almost unobservable. To substantiate the expectations on the presence of magnetic fields in the most-evolved massive stars, we selected two WR stars, WR 46 and WR 55, for the search of the presence of magnetic fields using FORS 2 spectropolarimetric observations. We achieve a formally definite detection of a variable mean longitudinal magnetic field of the order of a few hundred gauss in WR 55. The field detection in this star, which is associated with the ring nebula RCW 78 and the molecular environment, is of exceptional importance for our understanding of star formation. No field detection at a significance level of 3σ was achieved for WR 46, but the variability of the measured field strengths can be rather well phased with the rotation period of 15.5 h previously suggested by FUSE(Far Ultraviolet Spectroscopic Explorer) observations.

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