Magnetic effects from natural magnets have been known for a long
time. Recorded observations from the Greeks more than 2500 years
The word magnetism comes from the Greek word for a certain type of
stone (lodestone) containing iron oxide found in Magnesia, a district in
Properties of lodestones: could exert forces on similar stones and
could impart this property (magnetize) to a piece of iron it touched.
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.
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.
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.
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.
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.
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.
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.
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
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.
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....
This is a companion volume to Electromagnetism for Electronic Engineers(3
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.
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
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
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: Studies on Preparation of Photosensitizer Loaded Magnetic Silica Nanoparticles and Their Anti-Tumor Effects for Targeting Photodynamic Therap
This book evolved from the first term of a two-term course on the physics of charged particle
acceleration that I taught at the University of New Mexico and at Los Alamos National
Laboratory. The first term covered conventional accelerators in the single particle limit. The
second term covered collective effects in charged particle beams, including high current
transport and instabilities. The material was selected to make the course accessible to graduate
students in physics and electrical engineering with no previous background in accelerator theory.
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....
In a number of developing countries, obesity currently affects all income groups of adult men
and women, but it is rapidly increasing among poor urban populations. The increase in
obesity in these countries is attributed to the conjunction of complex societal factors, such as
urbanization, economic growth and modernization, globalisation of food markets, and
changes in diet and physical activity patterns.