Influence of the magnetic field of the machine on fatigue test results

1978 ◽  
Vol 10 (11) ◽  
pp. 1370-1374
Author(s):  
V. K. Samarin
Keyword(s):  
Magnetic Field ◽  
Fatigue Test ◽  
Test Results ◽  
The Magnetic Field

Targeting Magnetic Nanoparticles in High Magnetic Fields for Drug Delivery Purposes

2004 ◽  
Vol 820 ◽  
Author(s):  
Ramazan Asmatulu ◽  
Richard.O. Claus ◽  
Judy S. Riffle ◽  
Michael Zalich
Keyword(s):  
Magnetic Field ◽  
Drug Delivery ◽  
Magnetic Nanoparticles ◽  
Magnetic Fields ◽  
Magnetic Particles ◽  
Guidance System ◽  
Test Results ◽  
Test Parameters ◽  
Magnetic Guidance ◽  
The Magnetic Field

AbstractBiodegradable magnetic nanoparticles were synthesized using Poly(L-Lactic Acid) and magnetite nanoparticles (∼14 nm) at different dosages, and then these nanaoparticles (nanocomposites) and pure magnetic particles were targeted in external magnetic fields by changing the test parameters. The magnetic field test results showed that magnetic saturation, fluid speed, magnetic field distance and particle size were extremely effective for a magnetic guidance system that is needed for an effective drug delivery approach. Thus, it is assumed that such nanoparticles can carry drugs (chemotherapy) to be able to cure cancer tumors as well as many other diseases.

Hydrodynamic Behavior of Magnetic Nanocomposite Spheres Under Magnetic Fields

2011 ◽  
Author(s):  
H. L. Wamocha ◽  
R. Asmatulu ◽  
T. S. Ravigururajan
Keyword(s):  
Magnetic Field ◽  
Study Drug ◽  
Magnetic Nanocomposite ◽  
Test Results ◽  
Hydrodynamic Behavior ◽  
Oil Emulsion ◽  
Pump Speed ◽  
In Vivo Tests ◽  
The Magnetic Field

In the present study, drug carrying magnetic nanocomposite spheres were fabricated using oil-in-oil emulsion/solvent evaporation method and characterized via different techniques. The spheres with a diameter of 200 nm and 3 μm consist of poly (lactic-co-glycolic acid) (PLGA), a drug and magnetic nanoparticles (e.g., Fe3O4 or Co0.5Zn0.5Fe2O4). The spheres were initially dispersed in both deionized (DI) water and viscous glycerol solutions, and pumped in a magnetic field at different tube diameters, pump speeds and concentrations to study the hydrodynamic behavior of drug-carrying magnetic nanocomposite spheres. The test results showed that the magnetic field, tube diameter, pump speed and magnetic nanoparticle concentrations in the spheres drastically changed the capturing efficiency of the spheres. In the in vivo tests of the spheres, these parameters should be considered in order to increase the efficiency of the drug delivery systems.

scholarly journals Eddy Currents Based Stray Loss Model For Variable Load Conditions of Medium Power Induction Motors

2021 ◽  
Author(s):  
Rajendra Kumar ◽  
Praveen Kumar ◽  
Teruo Kanekawa ◽  
Koji Oishi
Keyword(s):  
Magnetic Field ◽  
Induction Motor ◽  
Eddy Currents ◽  
Induction Motors ◽  
Variable Load ◽  
Test Results ◽  
Loss Model ◽  
Development And Validation ◽  
The Impact ◽  
The Magnetic Field

<div>This paper presents an eddy current based stray loss model for induction motors taking into account the impact of motor’s loading. The model uses the various motor inductances and, other nameplate data of an induction motor as primary variables. The Magnetic field distribution in a motor is prominently affected by the stator and rotor slot geometries. Distortions in the magnetic field have a direct impact on SL as well as on various inductances of the motor. The development and validation of the model is accomplished by testing total 26 numbers of induction motors of different geometries and materials at different loading conditions. In a further step, the applicability of the model in designing an IM is presented by re-designing a 75kW induction motor and comparing the experimental test results with the initial IM.</div>

scholarly journals Peningkatan Motivasi dan Hasil Belajar Materi Medan Magnet Menggunakan Metode Cooperative Learning Tipe Jigsaw pada Siswa Kelas X TAV 3 SMK Negeri 1 Adiwerna Semester Genap Tahun Pelajaran 2017/2018

2018 ◽  
Vol 9 (2) ◽  
Author(s):  
Musriyah Musriyah
Keyword(s):  
Magnetic Field ◽  
Learning Outcomes ◽  
Initial Conditions ◽  
Absorption Capacity ◽  
Vocational School ◽  
Test Results ◽  
Test Technique ◽  
School Year ◽  
Motivation And Learning ◽  
The Magnetic Field

This research is motivated by the reality at Adiwerna Tegal 1 State Vocational School, that the results of learning the magnetic field class X TAV 3 have not achieved the expected results. The first daily test results were still low, still below the ideal classical completeness criteria set at 80%, and individual learning outcomes above KKM of ≥ 70 or individual absorption of 70%. The method in collecting data is a test technique used to measure students 'comprehension in the form of learning outcomes and observation techniques carried out collaboratively to record students' motivation in learning and to know the progress of the learning process from cycle to cycle. From the results of data analysis, it is stated that: 1) Initial conditions, that classical absorption power which is the learning outcomes of all students only reached 55.56% means that it is under the classical completeness that has been set at 80% (ideal conditions). 2). In Cycle 1, classical absorption reached 72.22% which means it was still under class completeness. 3). In Cycle 2, the classical absorption capacity reached 86.11% above the class completeness which was set at 80%. From the results of the study it can be concluded that there is an increase in motivation and learning outcomes of magnetic field material by applying the cooperative jigsaw type learning method to class X TAV 3 of Adiwerna Tegal 1 State Vocational School of the school year 2017/2018.

scholarly journals Eddy Currents Based Stray Loss Model For Variable Load Conditions of Medium Power Induction Motors

2021 ◽  
Author(s):  
Rajendra Kumar ◽  
Praveen Kumar ◽  
Teruo Kanekawa ◽  
Koji Oishi
Keyword(s):  
Magnetic Field ◽  
Induction Motor ◽  
Eddy Currents ◽  
Induction Motors ◽  
Variable Load ◽  
Test Results ◽  
Loss Model ◽  
Development And Validation ◽  
The Impact ◽  
The Magnetic Field

<div>This paper presents an eddy current based stray loss model for induction motors taking into account the impact of motor’s loading. The model uses the various motor inductances and, other nameplate data of an induction motor as primary variables. The Magnetic field distribution in a motor is prominently affected by the stator and rotor slot geometries. Distortions in the magnetic field have a direct impact on SL as well as on various inductances of the motor. The development and validation of the model is accomplished by testing total 26 numbers of induction motors of different geometries and materials at different loading conditions. In a further step, the applicability of the model in designing an IM is presented by re-designing a 75kW induction motor and comparing the experimental test results with the initial IM.</div>

Observing the galactic magnetic field

1967 ◽  
Vol 31 ◽  
pp. 375-380
Author(s):  
H. C. van de Hulst
Keyword(s):  
Magnetic Field ◽  
Fair Agreement ◽  
Solar Neighbourhood ◽  
Galactic Magnetic Field ◽  
The Magnetic Field

Various methods of observing the galactic magnetic field are reviewed, and their results summarized. There is fair agreement about the direction of the magnetic field in the solar neighbourhood:l= 50° to 80°; the strength of the field in the disk is of the order of 10-5gauss.

Evolution of Large-Scale Coronal Structures

1994 ◽  
Vol 144 ◽  
pp. 29-33
Author(s):  
P. Ambrož
Keyword(s):  
Magnetic Field ◽  
Field Line ◽  
Large Scale ◽  
Coronal Magnetic Field ◽  
Source Surface ◽  
Solar Cycles ◽  
Characteristic Relationship ◽  
The Magnetic Field ◽  
Coronal Structures

AbstractThe large-scale coronal structures observed during the sporadically visible solar eclipses were compared with the numerically extrapolated field-line structures of coronal magnetic field. A characteristic relationship between the observed structures of coronal plasma and the magnetic field line configurations was determined. The long-term evolution of large scale coronal structures inferred from photospheric magnetic observations in the course of 11- and 22-year solar cycles is described.Some known parameters, such as the source surface radius, or coronal rotation rate are discussed and actually interpreted. A relation between the large-scale photospheric magnetic field evolution and the coronal structure rearrangement is demonstrated.

Emergence of Twisted Magnetic Flux Related Sigmoidal Brightening

2000 ◽  
Vol 179 ◽  
pp. 263-264
Author(s):  
K. Sundara Raman ◽  
K. B. Ramesh ◽  
R. Selvendran ◽  
P. S. M. Aleem ◽  
K. M. Hiremath
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Magnetic Flux ◽  
Ultra Violet ◽  
Active Regions ◽  
Morphological Properties ◽  
Energy Storage And Conversion ◽  
The Sun ◽  
X Rays ◽  
The Magnetic Field

Extended AbstractWe have examined the morphological properties of a sigmoid associated with an SXR (soft X-ray) flare. The sigmoid is cospatial with the EUV (extreme ultra violet) images and in the optical part lies along an S-shaped Hαfilament. The photoheliogram shows flux emergence within an existingδtype sunspot which has caused the rotation of the umbrae giving rise to the sigmoidal brightening.It is now widely accepted that flares derive their energy from the magnetic fields of the active regions and coronal levels are considered to be the flare sites. But still a satisfactory understanding of the flare processes has not been achieved because of the difficulties encountered to predict and estimate the probability of flare eruptions. The convection flows and vortices below the photosphere transport and concentrate magnetic field, which subsequently appear as active regions in the photosphere (Rust &amp; Kumar 1994 and the references therein). Successive emergence of magnetic flux, twist the field, creating flare productive magnetic shear and has been studied by many authors (Sundara Ramanet al.1998 and the references therein). Hence, it is considered that the flare is powered by the energy stored in the twisted magnetic flux tubes (Kurokawa 1996 and the references therein). Rust &amp; Kumar (1996) named the S-shaped bright coronal loops that appear in soft X-rays as ‘Sigmoids’ and concluded that this S-shaped distortion is due to the twist developed in the magnetic field lines. These transient sigmoidal features tell a great deal about unstable coronal magnetic fields, as these regions are more likely to be eruptive (Canfieldet al.1999). As the magnetic fields of the active regions are deep rooted in the Sun, the twist developed in the subphotospheric flux tube penetrates the photosphere and extends in to the corona. Thus, it is essentially favourable for the subphotospheric twist to unwind the twist and transmit it through the photosphere to the corona. Therefore, it becomes essential to make complete observational descriptions of a flare from the magnetic field changes that are taking place in different atmospheric levels of the Sun, to pin down the energy storage and conversion process that trigger the flare phenomena.

On the Configuration of the Magnetic Field of β CrB

1976 ◽  
Vol 32 ◽  
pp. 613-622
Author(s):  
I.A. Aslanov ◽  
Yu.S. Rustamov
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Radial Velocity ◽  
Magnetic Field Strength ◽  
Complex Shape ◽  
Rotation Period ◽  
Field Variation ◽  
Magnetic Field Variation ◽  
Secular Variations ◽  
The Magnetic Field

SummaryMeasurements of the radial velocities and magnetic field strength of β CrB were carried out. It is shown that there is a variability with the rotation period different for various elements. The curve of the magnetic field variation measured from lines of 5 different elements: FeI, CrI, CrII, TiII, ScII and CaI has a complex shape specific for each element. This may be due to the presence of magnetic spots on the stellar surface. A comparison with the radial velocity curves suggests the presence of a least 4 spots of Ti and Cr coinciding with magnetic spots. A change of the magnetic field with optical depth is shown. The curve of the Heffvariation with the rotation period is given. A possibility of secular variations of the magnetic field is shown.

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