Magnetic effects

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  •  Some history:  Magnetic effects from natural magnets have been known for a long time. Recorded observations from the Greeks more than 2500 years ago.  The word magnetism comes from the Greek word for a certain type of stone (lodestone) containing iron oxide found in Magnesia, a district in northern Greece.  Properties of lodestones: could exert forces on similar stones and could impart this property (magnetize) to a piece of iron it touched.

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  • Magnetism often has a slight overtone of being mysterious. This is probably caused by the surprisingly strong forces between magnets which everybody can experience with magnetic toys, magnet boards, or similar objects. A strange effect is the unique ability of magnetic fields to penetrate many substances without any attenuation. Though the physical basis of magnetism is well explored, the outsider usually does not know very much about the details and sometimes tends to overestimate the real possibilities provided by magnetism.

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  • This paper studied the effects of Co, Ni replacement in the Fe1-xCoxFe2O4 and Fe1-yNiyFe2O4 (x, y = 0, 0.05, 0.1, 0.2, 0.5) nanoparticles, pH, weight of nanoparticles/ml of water and time of stirring on the arsenic removal ability. The results showed that small amount of 0.25 g/l of Fe3O4 nanoparticles after stirring time of 3 minutes can reduce the arsenic concentration from 0.1 mg/l to 0.01 mg/l. The removal was also affected by the pH of the water.

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  • In this report, we studied the effect of electrolyte concentration on the electrochemical and magnetic properties of the LaNi4.6Ge0.4 alloys used as the negative electrode in Ni-MH rechargeable batteries. Effect of electrolyte concentration on the electrochemical and magnetic properties of the LaNi4.6Ge0.4 alloys was investigated by the measurements of magnetization curves and charge-discharge performance of the material.

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  • The Transverse Hall effect (THE) has been theoretical studied in a quantum well (QW) with high infinite potential subjected to a crossed dc electric field and a magnetic field (MF) which is oriented perpendicularly to the confinement direction in the present of an intense electromagnetic wave (EMW).

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  • Micro-homogeneous solvent mixtures of propyl acetate (PA)/butyronitrile (BN) allow for a systematic variation of the static dielectric constants, s , in the range from 6.0 to 24.6. The mixtures of toluene (TO)/dimethylsulfoxide (DMSO) with varying the s values in the range from 4.3 to 15.5 are used as micro-heterogeneous binary solvents. In micro-heterogeneous environment, DMSO molecules get preferentially favoured in the solvation shell, forming micro-clusters surrounding the solute molecules.

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  • In a classic paper by the late Yale historian of science, Derek De Solla Price (1965), based mainly on the study of citations in a single scientific research field, it was shown how citations in a developing research area have a strong 'immediacy effect'.1 Citation was found to be at a maximum for papers about two-and-a-half years old, and the 'major work of a paper ... [is] finished after 10 years', as judged by citations.

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  • The growth of magnetic resonance imaging (MRI) as a tool for studying brain function, as opposed to its more traditional role as a tool for studying brain anatomy and pathology, has been quite remarkable over the past decade. This has been driven in large measure by an appreciation of the considerable potential for functional magnetic resonance imaging (fMRI) to increase our understanding of how the human brain works, both in the normal and diseased states.

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  • Electromagnetism is fundamental to the whole of electrical and electronic engineering. It provides the basis for understanding the uses of electricity and for the design of the whole spectrum of devices from the largest turbo-alternators to the smallest microcircuits. This subject is a vital part of the education of electronic engineers. Without it they are limited to understanding electronic circuits in terms of the idealizations of circuit theory.

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  • The aim of the study was to investigate the crystallization kinetics and solidification behaviour of Fe60Co8Mo5Zr10W2B15 bulk glass forming alloy. The solidification behaviour in near-equilibrium and non-equilibrium cooling conditions was studied. The eutectic and peritectic reactions were found to exist in the solidification sequence of the alloy. The bulk metallic glass formation was achieved by using two methods: quenching from the liquid state and quenching from the semi-state.

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  • Those of us involved in the development of magnetic resonance angiography (MRA) in the late 1980’s could hardly envision the routine application of MRA in every MR facility everyday. In those years there was spectacular development of many new MR clinical applications.Many pioneering researchers investigated various strategies exploiting the effects of blood flow on the MR signal to optimize clinical MRA. Remarkable successes were demonstrated in rapid succession.

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  • Putting the quantum into magnetism might, at first sight, seem like stating the obvious; the exchange interactions leading to collective magnetic behavior are, after all, a pure quantum effect. Yet, for many phenomena in magnetism this underlying quantum nature may be safely ignored at least on the qualitative level. The investigation of magnetic systems where quantum effects play a dominant role and have to be accounted for in detail has, over the last decades, evolved to be a field of very active research....

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  • Breast cancer remains a leading cause of cancer death among women in the United States. More than 180,000 new cases of invasive breast cancer are diagnosed each year, and more than 40,000 women die of the disease. Recent years, however, have seen improvements in survival attributed to better treatment and earlier diagnosis. Research efforts have been directed toward better treatment, preventive strategies, and early detection.

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  • An integrated approach among the local, State, and Federal Government provides for a logical clearinghouse for intelligence on the movement and activities of terrorist groups and the collection, interpretation, and dissemination of that information to the proper enforcement agencies. Effective planning and intelligence gathering can lessen the likelihood of a surprise emergency incident, which, improperly handled, can make or break a department and its administrators at all levels of government.

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  • This is a companion volume to Electromagnetism for Electronic Engineers(3 rd edn.) (Ventus, 2009). It contains the worked examples, together with worked solutions to the end of chapter examples, which featured in the previous edition of the book. I have discovered and corrected a number of mistakes in the previous edition. I hope that students will find these 88 worked examples helpful in illustrating how the fundamental laws of electromagnetism can be applied to a range of problems.

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: A Novel Approach to Molecular Recognition Surface of Magnetic Nanoparticles Based on Host–Guest Effect

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Effects of Proteins from Culture Medium on Surface Property of Silanes- Functionalized Magnetic

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  • In the last two decades, many books have been published on ion implantation and ion-beam processing. Why this one now? After all, the advantages of using an energetic ion beam to modify surfaces with a view to enhancing their tribological, electrochemical, optical and magnetic properties have been known for some time. The aim of this volume is to review the basics of previous work on ion-beam modification of materials and to include enough new material on novel applications to bring newcomers “up to speed” in this exciting area....

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Histological analysis of the effects of a static magnetic field on bone healing process in rat femurs

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: The Effect of Iron Oxide Magnetic Nanoparticles on Smooth Muscle Cells

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