نتایج جستجو برای: magnetic data

تعداد نتایج: 2702618  

Journal: :فیزیک زمین و فضا 0
محمدرضا آزاد کارشناس ارشد مهندسی اکتشاف معدن، دانشگاه صنعتی شاهرود، شرکت سیمان قاین

according to this reality that iron bulks because of having ferromagnetic minerals, they have high magnetic intensity, in mining explorations most usual geophysical method  suggested to explore these resources is magnetic method. basically in order to process and interpretation of magnetic anomaly maps several methods be used of which most of these methods are based on try and error. one of usu...

Journal: :international journal of environmental research 2014
a.l. ananthapadmanabha r. shankar k. sandeep

in this study we report the rock magnetic properties of surface soil samples and their spatialvariability from the northernmost district of kerala to understand pedogenic processes and soil erosion. themagnetic signal is mainly from fine grained pedogenic magnetite as other sources like anthropogenic andlithogenic magnetite, bacterial magnetite and greigite are absent. the surface soil samples ...

Low-intensity magnetic separators are widely used in the research works and the industry. Advancement in the magnetic separation techniques has led to an expansion in the application of this method in different fields such as enrichment of magnetic mineral, wastewater treatment, and medicine transfer in the human body. In the mineral processing industry, the main application of wet magnetic sep...

Journal: :فیزیک زمین و فضا 0
محمد حامدپور دارابی استادیار، گروه فیزیک، دانشگاه هرمزگان، ایران مریم نورافشان مربی، گروه فیزیک، دانشگاه هرمزگان، ایران جان دیرینگ استاد، گروه جغرافیا، دانشگاه لیورپول، انگلستان

using a magnetic property measurement system (mpms), we measure magnetic susceptibility continuously at frequencies from 0 to 1000 hz for three different superparamagnetic (sp) grain sizes of magnetite (5nm, 7 nm and 10 nm) suspended in hydrocarbons (ferrofluids). our results confirm non-zero values of frequency-dependent susceptibility in the fine tail of nano-sized grains and provide new empi...

Journal: :فیزیک زمین و فضا 0
براتعلی فیض آبادی دانشگاه تربیت معلم، سبزوار- استادیار محمود میرزایی دانشگاه اراک، استادیار ناصر حسین زاده گویا مؤسسه ژئوفیزیک دانشگاه تهران- دانشیار

the interaction between the solar wind and the earth’s magnetosphere results in the transport of magnetic flux into the magnetotail and to avoid a continued buildup in the tail, there is a return convection of magnetic flux from the magnetotail into the night-side dipole-like region and from there to the day-side. since there is energetic plasma with this magnetic flux, hence electric currents ...

Journal: :فیزیک زمین و فضا 0
اردلان خزائی فر دانشجوی کارشناسی ارشد، دانشکدة معدن، نفت و ژئوفیزیک، دانشگاه صنعتی شاهرود، ایران علی نجاتی کلاته استادیار، دانشکدة معدن، نفت و ژئوفیزیک، دانشگاه صنعتی شاهرود، ایران امین روشندل کاهو استادیار، دانشکدة معدن، نفت و ژئوفیزیک، دانشگاه صنعتی شاهرود، ایران فرامرز الله وردی میگونی کارشناس ژئوفیزیک، مدیریت اکتشاف، سازمان زمین شناسی و اکتشافات معدنی کشور، تهران، ایران

there are various approaches for depth estimation of anomalous potential field data. spectral analysis of gravity and magnetic data has been used extensively for many years to derive the depth to certain geological structures, such as the magnetic basement or the curie temperature isotherm. the interpretation of the gravity and magnetic data is preferred in frequency domain because of simple re...

Remnant magnetization causes a change in the direction and intensity of the magnetization vector. If inversion is performed regardless of remnance, in some cases it may have unreliable and misleading results. For inversion with respect to remnant magnetization, several solutions have been proposed so far, one of which is to convert the data of total magnetic field into data that is independent ...

Journal: :physical chemistry research 0
khatereh bahrpaima firoozabad branch, islamic azad university ali reza bijanzadeh firoozabad branch, islamic azad university mehdi behzadi firoozabad branch, islamic azad university

the effect of magnetic field on the liquid-liquid equilibrium of two ternary systems (water + acetic acid + butyl acetate and water + acetic acid + dimethyl succinate) at 298.15 k under atmospheric pressure was investigated. the results obtained show that the strength of the magnetic field (0.02 t) affects the solubility of acetic acid in the used organic solvents. distribution coefficients and...

Journal: :middle east journal of cancer 0
sedigheh tahmasebi general surgery department, shiraz university of medical sciences, shiraz, iran mohammad hasan hashemizadeh general surgery department, shiraz university of medical sciences, shiraz, iran abdolrasoul talei general surgery department, shiraz university of medical sciences, shiraz, iran sepideh sefidbakht department of radiology, shiraz university of medical sciences, shiraz, iran maral mokhtari department of pathology, shiraz university of medical sciences, shiraz, iran abdolkhalegh keshavarzi general surgery department, shiraz university of medical sciences, shiraz, iran

background : magnetic resonance imaging of the breast is becoming a useful adjunct to mammography and sonography for the detection of breast lesions. however, it is not yet accepted as a routine examination for all breast cancer patients due to the lack of data regarding whether breast magnetic resonance imaging impacts recurrence or survival. this trial examines the use of magnetic resonance i...

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