SCALE MODEL EXPERIMENTS IN ELECTROMAGNETIC METHODS OF GEOPHYSICAL EXPLORATION

1951 ◽  
Vol 29 (4) ◽  
pp. 285-293 ◽  
Author(s):  
A. R. Clark ◽  
A. G. Mungal
Keyword(s):  
Magnetic Fields ◽  
Small Amplitude ◽  
Scale Model ◽  
Model Experiments ◽  
Geophysical Exploration ◽  
Electromagnetic Methods ◽  
Conducting Bodies ◽  
Alternating Magnetic Fields

A method of accurately measuring the phase as well as the amplitude of alternating magnetic fields of small amplitude has been devised and applied to the investigation of the response of conducting bodies placed in an electromagnetic field.The results have indicated how the position, dimensions, and dip of buried conductors may be evaluated.

NONUNIFORM NONLINEAR OSCILLATIONS OF A DOMAIN WALL IN UNIAXIAL FERROMAGNET

1994 ◽  
Vol 04 (03) ◽  
pp. 569-578
Author(s):  
A.F. POPKOV ◽  
I.P. YAREMA ◽  
V.M. ELEONSKY
Keyword(s):  
Magnetic Fields ◽  
Domain Wall ◽  
Small Amplitude ◽  
Nonlinear Oscillations ◽  
Uniaxial Anisotropy ◽  
Life Time ◽  
Uniaxial Ferromagnet ◽  
Alternating Magnetic Fields

The nonlinear small amplitude excitations of a domain wall (DW) in the ferromagnet with high uniaxial anisotropy are investigated using reduced magnetodynamic equations. The “life-time” of soliton-like oscillations of DW in the nondissipative media is defined. The conditions of direct and parametric stabilization of self-localized DW oscillations by alternating magnetic fields are analyzed in the presence of dissipation.

Measuring Magnetic Permeability of Monolithic Annular Measures in Alternating Magnetic Fields

2019 ◽  
Vol 55 (11) ◽  
pp. 851-857 ◽  
Author(s):  
V. A. Syas’ko ◽  
S. S. Golubev ◽  
Ya. G. Smorodinskii ◽  
P. V. Solomenchuk ◽  
E. B. Bryukhovetskaya
Keyword(s):  
Magnetic Fields ◽  
Magnetic Permeability ◽  
Alternating Magnetic Fields

Experimental Study for SPAR Type Floating Offshore Wind Turbine With Blade-Pitch Control

2013 ◽  
Author(s):  
Toshiki Chujo ◽  
Yoshimasa Minami ◽  
Tadashi Nimura ◽  
Shigesuke Ishida
Keyword(s):  
Wind Turbine ◽  
Wind Farm ◽  
Offshore Wind ◽  
Scale Model ◽  
Offshore Wind Turbine ◽  
Experimental Proof ◽  
Pitch Control ◽  
Model Experiments ◽  
North Eastern ◽  
North Eastern Part

The experimental proof of the floating wind turbine has been started off Goto Islands in Japan. Furthermore, the project of floating wind farm is afoot off Fukushima Prof. in north eastern part of Japan. It is essential for realization of the floating wind farm to comprehend its safety, electric generating property and motion in waves and wind. The scale model experiments are effective to catch the characteristic of floating wind turbines. Authors have mainly carried out scale model experiments with wind turbine models on SPAR buoy type floaters. The wind turbine models have blade-pitch control mechanism and authors focused attention on the effect of blade-pitch control on both the motion of floater and fluctuation of rotor speed. In this paper, the results of scale model experiments are discussed from the aspect of motion of floater and the effect of blade-pitch control.

scholarly journals Inactivation of Bacteria Using Bioactive Nanoparticles and Alternating Magnetic Fields

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 342
Author(s):  
Vitalij Novickij ◽  
Ramunė Stanevičienė ◽  
Rūta Gruškienė ◽  
Kazimieras Badokas ◽  
Juliana Lukša ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Foodborne Pathogens ◽  
Morphological Changes ◽  
Foodborne Pathogen ◽  
Cellular Damage ◽  
Suitable Model ◽  
Log Reduction ◽  
Invasive Infections ◽  
Alternating Magnetic Fields ◽  
Inactivation Of Bacteria

Foodborne pathogens are frequently associated with risks and outbreaks of many diseases; therefore, food safety and processing remain a priority to control and minimize these risks. In this work, nisin-loaded magnetic nanoparticles were used and activated by alternating 10 and 125 mT (peak to peak) magnetic fields (AMFs) for biocontrol of bacteria Listeria innocua, a suitable model to study the inactivation of common foodborne pathogen L. monocytogenes. It was shown that L. innocua features high resistance to nisin-based bioactive nanoparticles, however, application of AMFs (15 and 30 min exposure) significantly potentiates the treatment resulting in considerable log reduction of viable cells. The morphological changes and the resulting cellular damage, which was induced by the synergistic treatment, was confirmed using scanning electron microscopy. The thermal effects were also estimated in the study. The results are useful for the development of new methods for treatment of the drug-resistant foodborne pathogens to minimize the risks of invasive infections. The proposed methodology is a contactless alternative to the currently established pulsed-electric field-based treatment in food processing.

Modulation of cardiac rhythm in the humans exposed to extremely weak alternating magnetic fields

BIOPHYSICS ◽  
2008 ◽  
Vol 53 (6) ◽  
pp. 648-654 ◽  
Author(s):  
V. V. Lednev ◽  
N. A. Belova ◽  
A. M. Ermakov ◽  
E. B. Akimov ◽  
A. G. Tonevitsky
Keyword(s):  
Magnetic Fields ◽  
Cardiac Rhythm ◽  
Alternating Magnetic Fields

Magnetocaloric properties of manganites in alternating magnetic fields

JETP Letters ◽  
2010 ◽  
Vol 90 (10) ◽  
pp. 663-666 ◽  
Author(s):  
A. M. Aliev ◽  
A. B. Batdalov ◽  
V. S. Kalitka
Keyword(s):  
Magnetic Fields ◽  
Magnetocaloric Properties ◽  
Alternating Magnetic Fields

A PRELIMINARY REPORT ON MODEL STUDIES OF MAGNETIC ANOMALIES OF THREE‐DIMENSIONAL BODIES

Geophysics ◽  
1956 ◽  
Vol 21 (3) ◽  
pp. 794-814 ◽  
Author(s):  
Isidore Zietz ◽  
Roland G. Henderson
Keyword(s):  
Magnetic Fields ◽  
Rapid Method ◽  
Preliminary Report ◽  
Three Dimensional ◽  
Magnetic Anomalies ◽  
Constant Thickness ◽  
Laboratory Methods ◽  
Model Experiments ◽  
Model Studies ◽  
Different Depths

Model experiments were made to devise a rapid method for calculating magnetic anomalies of three‐dimensional structures. The magnetic fields of the models were determined using the equipment at the Naval Ordnance Laboratory, White Oaks, Md. An irregularly shaped mass was approximated by an array of prismatic rectangular slabs of constant thickness and varying horizontal dimensions. Contoured maps are being prepared for these magnetic models at different depths and for several magnetic inclinations. The fields of these three‐dimensional structures are obtained by super‐imposing the appropriate contoured maps and adding numerically the effects at each point. The equipment and laboratory methods are described. Theoretical and practical examples are given.

Thermal Energy Dissipation by SiO2-Coated Plasmonic-Superparamagnetic Nanoparticles in Alternating Magnetic Fields

2013 ◽  
Vol 25 (22) ◽  
pp. 4603-4612 ◽  
Author(s):  
Georgios A. Sotiriou ◽  
Michelle A. Visbal-Onufrak ◽  
Alexandra Teleki ◽  
Eduardo J. Juan ◽  
Ann M. Hirt ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Magnetic Fields ◽  
Thermal Energy ◽  
Superparamagnetic Nanoparticles ◽  
Thermal Energy Dissipation ◽  
Alternating Magnetic Fields

scholarly journals Modelling imperfections in unreinforced masonry structures: Discrete element simulations and scale model experiments of a pavilion vault

2021 ◽  
Vol 228 ◽  
pp. 111499
Author(s):  
Alessandro Dell'Endice ◽  
Antonino Iannuzzo ◽  
Matthew J. DeJong ◽  
Tom Van Mele ◽  
Philippe Block
Keyword(s):  
Discrete Element ◽  
Unreinforced Masonry ◽  
Scale Model ◽  
Masonry Structures ◽  
Model Experiments ◽  
Discrete Element Simulations

Fundamentals of scale model experiments

JOM ◽  
1957 ◽  
Vol 9 (10) ◽  
pp. 1353-1358
Author(s):  
W. O. Philbrook
Keyword(s):  
Scale Model ◽  
Model Experiments
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