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Biological Effects of Power Frequency Electric and Magnetic Fields

Author : Office of Technology Assessment United S
Publisher : The Minerva Group, Inc.
Release Date : 2002-06
ISBN : 9780898759747
Pages : 122 pages
Language : EN, FR, GB
Rating : 4.7/5 (597 users download)

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Download or read book Biological Effects of Power Frequency Electric and Magnetic Fields written by Office of Technology Assessment United S and published by The Minerva Group, Inc.. This book was released on 2002-06 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report was prepared by the Office of Technology Assessment of the United States Congress to review the health effects of high-voltage transmission lines. For about two decades, there has been some concern about the health effects of electric and magnetic fields produced by transmission lines. Recent studies have heightened this concern. Health effects research is still preliminary and inconclusive, but a growing number of studies suggest that under certain circumstances even relatively weak electric and magnetic fields can produce biologic changes.This report discusses the present state of knowledge on the health effects of low-frequency electric and magnetic fields and describes current U. S. funding levels and research programs. Also, the report provides information on regulatory activity, including existing and proposed field exposure standards.

High Magnetic Fields

Author : Claude Berthier
Publisher : Springer Science & Business Media
Release Date : 2001
ISBN : 354043979X
Pages : 503 pages
Language : EN, FR, GB
Rating : 4.5/5 (44 users download)

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Download or read book High Magnetic Fields written by Claude Berthier and published by Springer Science & Business Media. This book was released on 2001 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt: The quantum Hall effect, low-dimensional systems, vortices and superconductivity, high-resolution NMR and EPR spectroscopy - all these and many other landmark contributions of high-magnetic-field physics to solid state science, analytical chemistry and structural biology are presented in this book. Each chapter describes the key concepts and future prospects in the corresponding field. The text can be read at different levels: researchers will find depth and insight, while students will come to understand the basic concepts. This book, written by leading scientists, will serve as a reference work on high-magnetic-field science for many years to come.

Electric and Magnetic Fields

Author : John Oatley
Publisher : CUP Archive
Release Date : 1976
ISBN : 9780521212281
Pages : 276 pages
Language : EN, FR, GB
Rating : 4.2/5 (122 users download)

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Download or read book Electric and Magnetic Fields written by John Oatley and published by CUP Archive. This book was released on 1976 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:

High Magnetic Fields

Author : Fritz Herlach
Publisher : World Scientific
Release Date : 2003
ISBN : 9812774874
Pages : 281 pages
Language : EN, FR, GB
Rating : 4.8/5 (127 users download)

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Download or read book High Magnetic Fields written by Fritz Herlach and published by World Scientific. This book was released on 2003 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: This three-volume book provides a comprehensive review of experiments in very strong magnetic fields that can only be generated with very special magnets. The first volume is entirely devoted to the technology of laboratory magnets: permanent, superconducting, high-power water-cooled and hybrid; pulsed magnets, both nondestructive and destructive (megagauss fields). Volumes 2 and 3 contain reviews of the different areas of research where strong magnetic fields are an essential research tool. These volumes deal primarily with solid-state physics; other research areas covered are biological systems, chemistry, atomic and molecular physics, nuclear resonance, plasma physics and astrophysics (including QED).

Magnetic Fields of Galaxies

Author : A.A. Ruzmaikin
Publisher : Springer Science & Business Media
Release Date : 2013-06-29
ISBN : 9400928351
Pages : 313 pages
Language : EN, FR, GB
Rating : 4.4/5 (9 users download)

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Download or read book Magnetic Fields of Galaxies written by A.A. Ruzmaikin and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetism, when extended beyond normal frameworks into cosmic space is characterized by an enormous spatial scale. Because of their large sizes the nature of magnets such as the Earth and the Sun is entirely different from the nature of a horseshoe magnet. The source of cosmic magnetism is associated with the hydrodynamic motions of a highly conductive medium. In this aspect, cosmic magnets resemble a dynamo. However, currents in the dynamo flow along properly ordered wires, while chaotic, turbulent motions are dominant inside stars and liquid planetary cores. This makes more intriguing and surprising the fact that these motions maintain a regular magnetic field. Maintenance of magnetic fields is even more impressive in huge magnets, i.e. galaxies. In fact, we are living inside a giant dynamo machine, the Milky Way galaxy. Although the idea of the global magnetic field of our Galaxy was clearly proposed almost 40 years ago, firm observational evidence and definite theoretical concepts of galactic magnetism have been developed only in the last decade. This book is the first attempt at a full and consistent presentation of this problem. We discuss both theoretical views on the origin of galactic magnetism and the methods of observational study. Previous discussions were on the level of review articles or separate chapters in monographs devoted to cosmic magnetic fields (see, e.g., H. K. Moffatt, 1978, E. N. Parker, 1979 and Zeldovich et aI., 1983).

The Effects of Magnetic Fields on Magnetic Storage Media Used in Computers

Author : Sidney B. Geller
Publisher :
Release Date : 1972
ISBN :
Pages : 40 pages
Language : EN, FR, GB
Rating : 4.:/5 (31 users download)

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Download or read book The Effects of Magnetic Fields on Magnetic Storage Media Used in Computers written by Sidney B. Geller and published by . This book was released on 1972 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Turbulence and Magnetic Fields in Astrophysics

Author : Edith Falgarone
Publisher : Springer Science & Business Media
Release Date : 2003-03-11
ISBN : 354000274X
Pages : 484 pages
Language : EN, FR, GB
Rating : 4.5/5 (4 users download)

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Download or read book Turbulence and Magnetic Fields in Astrophysics written by Edith Falgarone and published by Springer Science & Business Media. This book was released on 2003-03-11 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains review articles of most of the topics addressed at the conf- ence on Simulations of Magnetohydrodynamic turbulence in astrophysics: recent achievements and perspectives which took place from July 2 to 6, 2001 at the Institut Henri Poincar ́e in Paris. We made the choice to publish these lectures in a tutorial form so that they can be read by a broad audience. As a result, this book does not give an exhaustive view of all the subjects addressed during the conference. The main objective of this workshop which gathered about 90 scientists from di?erent ?elds, was to present and confront recent results on the topic of t- bulence in magnetized astrophysical environments. A second objective was to discuss the latest generation of numerical codes, such as those using adaptive mesh re?nement (AMR) techniques. During a plenary discussion at the end of the workshop discussions were held on several topics, often at the heart of vivid controversies. Topics included the timescale for the dissipation of magneto-hydrodynamical (MHD) turbulence, the role of boundary conditions, the characteristics of imbalanced turbulence, the validity of the polytropic approach to Alfv ́en waves support within interst- lar clouds, the source of turbulence inside clouds devoid of stellar activity, the timescale for star formation, the Alfv ́en Mach number of interstellar gas motions, the formation process for helical ?elds in the interstellar medium. The impact of small upon large scales was also discussed.

High Magnetic Fields

Author : Fritz Herlach
Publisher : World Scientific
Release Date : 2003-10-06
ISBN : 9814490539
Pages : 336 pages
Language : EN, FR, GB
Rating : 4.8/5 (144 users download)

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Download or read book High Magnetic Fields written by Fritz Herlach and published by World Scientific. This book was released on 2003-10-06 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This three-volume book provides a comprehensive review of experiments in very strong magnetic fields that can only be generated with very special magnets. The first volume is entirely devoted to the technology of laboratory magnets: permanent, superconducting, high-power water-cooled and hybrid; pulsed magnets, both nondestructive and destructive (megagauss fields). Volumes 2 and 3 contain reviews of the different areas of research where strong magnetic fields are an essential research tool. These volumes deal primarily with solid-state physics; other research areas covered are biological systems, chemistry, atomic and molecular physics, nuclear resonance, plasma physics and astrophysics (including QED).

Biological Effects of Magnetic Fields

Author : Madeleine F. Barnothy
Publisher : Springer Science & Business Media
Release Date : 2012-12-06
ISBN : 1475702140
Pages : 326 pages
Language : EN, FR, GB
Rating : 4.4/5 (757 users download)

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Download or read book Biological Effects of Magnetic Fields written by Madeleine F. Barnothy and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Study of the biological effect of magnetic fields is both a very old and a very recent area of investigation. A connection between health and the mysterious force of the lodestone has been suspected since the dawn of human culture. Nevertheless, only during the last decades has reliable evidence of biological effects of the magnetic field been dis covered. The purpose of this book is to bring together in one volume the present-day knowledge in all the active fields of biomagnetic research and at the same time to provide a theoretical and practical background to all scientists who wish to engage in investigations in this new disci pline. The need for such a comprehensive survey of current informa tion became evident to the editor from the interest manifested in the biomagnetic symposia and from the extended correspondence maintained by the Biomagnetic Research Foundation. It is hoped that the book will aid in attracting the interest of specialists and may thus serve as a catalyst for interdisciplinary exchange of ideas.

Physics of Semiconductors in High Magnetic Fields

Author : Noboru Miura
Publisher : OUP Oxford
Release Date : 2007-10-11
ISBN : 0191523372
Pages : 376 pages
Language : EN, FR, GB
Rating : 4.1/5 (915 users download)

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Download or read book Physics of Semiconductors in High Magnetic Fields written by Noboru Miura and published by OUP Oxford. This book was released on 2007-10-11 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the basic concepts of various physical phenomena in semiconductors and their modulated structures under high magnetic fields. The topics cover magneto-transport phenomena, cyclotron resonance, far-infrared spectroscopy, magneto-optical spectroscopy, diluted magnetic semiconductors in high magnetic fields, as well as the recent advances in the experimental techniques needed for high field experiments. Starting from the introductory part describing the basic theoretical background, each chapter introduces typical experimental data which were actually obtained in very high magnetic fields mostly in the pulsed field range up to several megagauss (20-100T). The book has both the character of a textbook and a monograph. For researchers and students with an interest in semiconductor physics or in high magnetic fields, it will serve as a useful guide.

Effects of Time-Varying Magnetic Fields in the Frequency Range 1 KHz to 100 KHz Upon the Human Body

Author : Julia Bohnert
Publisher : KIT Scientific Publishing
Release Date : 2014-05-12
ISBN : 3866447825
Pages : 203 pages
Language : EN, FR, GB
Rating : 4.8/5 (664 users download)

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Download or read book Effects of Time-Varying Magnetic Fields in the Frequency Range 1 KHz to 100 KHz Upon the Human Body written by Julia Bohnert and published by KIT Scientific Publishing. This book was released on 2014-05-12 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, the physiological effects of time-varying magnetic fields up to 100 kHz have been investigated, namely magnetic stimulation and body warming. Simulation studies were based on numerical calculations on sophisticated cell and body models. In addition, magnetic stimulation thresholds have been determined experimentally.The project was carried out within the scope of the development of Magnetic Particle Imaging, a new imaging technology for medical diagnostics.

Magnetic Fields Near and Far

Author : Timothy Robishaw
Publisher : Universal-Publishers
Release Date : 2008
ISBN : 1599426846
Pages : 172 pages
Language : EN, FR, GB
Rating : 4.5/5 (994 users download)

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Download or read book Magnetic Fields Near and Far written by Timothy Robishaw and published by Universal-Publishers. This book was released on 2008 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: According to astrophysical theory, magnetic fields should play an important role in the structure and dynamics of the interstellar medium. While astronomical observations confirm this directly, the observational record is sparse. This is because magnetic fields can only be measured via polarimetric methods, and most of these methods can only provide an indirect inference of the magnetic field strength. The Zeeman effect, however, is the only method by which in situ measurements of astrophysical magnetic fields can be made. The spectral signature of Zeeman splitting is imprinted in the circular polarization spectrum of radiation received from an astronomical source. In order to make a reliable detection at radio frequencies, one must employ careful calibrations and account for instrumental effects. We begin this dissertation by covering the fundamentals of radio spectropolarimetry. We then offer historical details regarding the Zeeman effect and its use in single-dish radio observations. We present an outline of how one accurately measures the Zeeman effect using large single-dish radio telescopes. We follow this with results from an assessment of the polarization properties of the 100 m Green Bank Telescope (GBT). We then present magnetic field detections made via the Zeeman effect from the Galactic scale to cosmological distances. We begin with GBT observations of 21 cm emission toward the Taurus Molecular Cloud (TMC) complex. Recent observations have suggested that fields stronger than 20 microgauss are located at the distance of the TMC. Our Zeeman observations rule out fields of this strength, but do show a clear +5 microgauss detection from HI emission at the velocity of the TMC. More surprisingly, we have discovered multiple detections of a line-of-sight magnetic field of strength roughly +40 microgauss in a filament near -50 km/s. We then present a windfall of detections of milligauss-strength magnetic fields in starburst galaxies. Detected by means of Zeeman splitting of 1667 MHz hydroxyl megamaser emission, these Arecibo and GBT results represent the first extragalactic Zeeman measurements to probe the field inside an external galaxy. Finally, we climb the cosmological distance ladder, and present a dramatic GBT detection of a magnetic field in a damped Lyman-alpha absorber at a redshift of 0.692. We discuss possible scenarios for the creation of an 84 microgauss field at a look-back time of 6.4 Gyr.

Opportunities in High Magnetic Field Science

Author : National Research Council
Publisher : National Academies Press
Release Date : 2005-08-26
ISBN : 0309095824
Pages : 189 pages
Language : EN, FR, GB
Rating : 4.3/5 (9 users download)

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Download or read book Opportunities in High Magnetic Field Science written by National Research Council and published by National Academies Press. This book was released on 2005-08-26 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-field magnetsâ€"those that operate at the limits of the mechanical and/or electromagnetic properties of their structural materialsâ€"are used as research tools in a variety of scientific disciplines. The study of high magnetic fields themselves is also important in many areas such as astrophysics. Because of their importance in scientific research and the possibility of new breakthroughs, the National Science Foundation asked the National Research Council to assess the current state of and future prospects for high-field science and technology in the United States. This report presents the results of that assessment. It focuses on scientific and technological challenges and opportunities, and not on specific program activities. The report provides findings and recommendations about important research directions, the relative strength of U.S. efforts compared to other countries, and ways in which the program can operate more effectively.

Recent Researches Into Solid Bodies and Magnetic Fields in the Solar System

Author : James I. Vette
Publisher : Pergamon Press
Release Date : 1983
ISBN :
Pages : 296 pages
Language : EN, FR, GB
Rating : 4.F/5 ( users download)

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Download or read book Recent Researches Into Solid Bodies and Magnetic Fields in the Solar System written by James I. Vette and published by Pergamon Press. This book was released on 1983 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:

MAGNETIC FIELD OF THE EARTH

Author : MERRILL
Publisher : Elsevier
Release Date : 1996-09-18
ISBN : 0080553206
Pages : 530 pages
Language : EN, FR, GB
Rating : 4.0/5 (85 users download)

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Download or read book MAGNETIC FIELD OF THE EARTH written by MERRILL and published by Elsevier. This book was released on 1996-09-18 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: MAGNETIC FIELD OF THE EARTH

Investigation of a Plasma Accelerator with Magnetic Field Arranged to Produce a Divergent-nozzle Effect

Author : Joseph D. Brooks
Publisher :
Release Date : 1969
ISBN :
Pages : 31 pages
Language : EN, FR, GB
Rating : 4.:/5 (31 users download)

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Download or read book Investigation of a Plasma Accelerator with Magnetic Field Arranged to Produce a Divergent-nozzle Effect written by Joseph D. Brooks and published by . This book was released on 1969 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:

High Magnetic Fields in Semiconductor Physics II

Author : Gottfried Landwehr
Publisher : Springer Science & Business Media
Release Date : 2012-12-06
ISBN : 3642838103
Pages : 651 pages
Language : EN, FR, GB
Rating : 4.6/5 (428 users download)

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Download or read book High Magnetic Fields in Semiconductor Physics II written by Gottfried Landwehr and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 651 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains contributions presented at the International Conference "The Application of High Magnetic Fields in Semiconductor Physics", which was held at the University of Wiirzburg from August 22 to 26, 1988. In the tradition of previous Wiirzburg meetings on the subject - the first conference was held in 1972 - only invited papers were presented orally. All 42 lecturers were asked to review their subject to some extent so that this book gives a good overview of the present state of the respective topic. A look at the contents shows that the subjects which have been treated at previous conferences have not lost their relevance. On the contrary, the application of high magnetic fields to semiconductors has grown substantially during the recent past. For the elucidation of the electronic band structure of semicon ductors high magnetic fields are still an indispensable tool. The investigation of two-dimensional electronic systems especially is frequently connected with the use of high magnetic fields. The reason for this is that a high B-field adds angular momentum quantization to the boundary quantization present in het erostructures and superlattices. A glance at the contributions shows that the majority deal with 2D properties. Special emphasis was on the integral and fractional quantum Hall effect. Very recent results related to the observation of a fraction with an even denbminator were presented. It became obvious that the polarization of the different fractional Landau levels is more complicated than originally anticipated.