نتایج جستجو برای: magnetic field

تعداد نتایج: 1045756  

Anoosh Zamiran Mohammad Reza Maleki Vahid Reza Saffari

The effect of electromagnetic field was examined on Zinnia (Zinnia elegans) seeds to enhance seed germination and early growth. The seeds were exposed to four magnetic strengths of 15, 100, 400 and 800 mT in four durations of 30, 60, 120 and 240 min. The experiments were carried out in two forms of laboratory germination and soil emergence. Results showed that magnetic field application enhance...

صمدی, محمد تقی, فراستی, فرهاد, پورمحمدی, علی,

Introduction & Objective: The use of computers and monitors (displays) has been developed due to their increasing capabilities. The presence of electromagnetic fields, infrared and ul-traviolet radiations has been proven around the display, which all of them have adverse ef-fects on human health. Therefore, this study was conducted to survey and compare the mentioned variables around the disp...

A Naseri H Ghafarian Malmiri M Behzad S. F Ashrafi,

In this study, the feasibility of using magnetic technology to reduce the dispersion of soil has been investigated. The reference treatment was potable water and 3 magnetic water devices (with different magnetic intensities) were used for magnetizing the potable water. The results showed that the magnetic field has a significant effect in order of 5 percent on increasing of magnesium concentrat...

In the present study, the magnetic field effects of the elastic response of the polymeric piezoelectric cylinder reinforced with the carbon nanotubes (CNTs) are studied. The cylinder is subjected to an internal pressure, a constant electric potential difference at the inner and outer surfaces, and the thermal and magnetic fields. The Mori-Tanaka model is used for obtaining the equivalent materi...

F. Faghihi , H. Heydari,

Stray magnetic field is one of the main issues in design of transformers, since it causes non-ideal behavior of transformers. One of the techniques is usually adopted to mitigate the unwanted stray magnetic field is the use of auxiliary windings creating a magnetic field opposite to the incident one giving rise to the reduction of the total magnetic fields. This paper presents a new mathematica...

Nirmala P Ratchagar Vijaya Kumar

A mathematical model for nutritional transport in capillary tissues exchange system in thepresence of magnetic field has been studied. In this case, the cell is deformed. Due to concentrationgradients, the dissolved nutrient in substrate diffuses into surrounding tissue. Theanalytical method is based on perturbation technique while the numerical simulation is basedon finite difference scheme. R...

Journal: :amirkabir international journal of modeling, identification, simulation & control 2015
hamed milanchian jafar keighobadi hossein nourmohammadi

in a strapdown magnetic compass, heading angle is estimated using the earth's magnetic field measured by three-axis magnetometers (tam). however, due to several inevitable errors in the magnetic system, such as sensitivity errors, non-orthogonal and misalignment errors, hard iron and soft iron errors, measurement noises and local magnetic fields, there are large error between the magnetometers'...

Journal: :فیزیک زمین و فضا 0
مسلم فاتحی دانشجوی دکترای مهندسی معدن - اکتشاف، دانشگاه صنعتی اصفهان، ایران غلامحسین نوروزی دانشیار، دانشکده مهندسی معدن، پردیس دانشکده های فنی، دانشگاه تهران، ایران میثم عابدی دانشجوی دکترای مهندسی معدن – اکتشاف، دانشکده مهندسی معدن، پردیس دانشکده های فنی، دانشگاه تهران، ایران

magnetic survey is nowadays the most efficient non-destructive geophysical method. this technique puts emphasis on the measurement of anomalies of the earth’s magnetic field, caused by the presence of archaeological remains in the ground. magnetic survey is one of the oldest geophysical methods for airborne and land use. that is why there is a large volume of data that could be used for geologi...

Journal: :cell journal 0

the effect of external magnetic and electric fields, in the range of electroporation and magnetoporation, on lucifer yellow (ly) fluorescence in the absence of cells is studied. electric-field-induced quenching and magnetic field-induced increase are observed for fluorescence intensity of ly. regard to the fact that the variation of field-induced fluorescence, even in the absence of cells, can ...

Journal: :iranian journal of pharmaceutical sciences 0
mortaza mozaffari physics department, isfahan university, isfahan, iran nanophysics research group, center for nanosciences and nanotechnology research, isfahan university, isfahan, iran behshid behdadfar physics department, isfahan university, isfahan, iran jamshid amighian physics department, isfahan university, isfahan, iran nanophysics research group, center for nanosciences and nanotechnology research, isfahan university, isfahan, iran

in this work, mn ferrite nanopowders were prepared by co-precipitation method and were characterized. phase identification of the nanopowders was performed by x-ray diffraction method and the mean particle size of the nanopowders was calculated by scherrer's formula, using necessary corrections. magnetic parameters of the prepared nanopowders were measured by a vibrating sample magnetomete...

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