Magnetic Fields Near And Far

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Magnetic Fields Near and Far

Author : Timothy Robishaw
Publisher : Universal-Publishers
ISBN 13 : 1599426846
Total Pages : 173 pages
Book Rating : 4.5/5 (994 download)

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Book Synopsis Magnetic Fields Near and Far by : Timothy Robishaw

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 173 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.

Atlas of the Gravity and Magnetic Fields of the Moon

Author : Jaroslav Klokočník
Publisher : Springer Nature
ISBN 13 : 3031088670
Total Pages : 273 pages
Book Rating : 4.0/5 (31 download)

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Book Synopsis Atlas of the Gravity and Magnetic Fields of the Moon by : Jaroslav Klokočník

Download or read book Atlas of the Gravity and Magnetic Fields of the Moon written by Jaroslav Klokočník and published by Springer Nature. This book was released on 2022-11-09 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents gravity aspects (gravity disturbance, Marussi tensor, two gravity invariants, their certain ratio, the strike angles, and the virtual deformations) which are computed and evaluated for the Moon, using the recent static global gravity field model (GRGM1200A) to degree and order of 600 in spherical harmonic expansion. The magnetic anomaly model and surface topography (from the LOLA mission) are added. Results are shown for the whole Moon, for its segments around the Moon and as zooms for selected impact craters, maria and catenae; they are shortly interpreted and opened for further selenologic applications. The book contains information about the geology of the Moon, together with basic information about the magnetic field, mapping and topography models.

EMC for Product Designers

Author : Tim Williams
Publisher : Newnes
ISBN 13 : 1483183882
Total Pages : 276 pages
Book Rating : 4.4/5 (831 download)

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Book Synopsis EMC for Product Designers by : Tim Williams

Download or read book EMC for Product Designers written by Tim Williams and published by Newnes. This book was released on 2014-06-28 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: EMC for Product Designers: Meeting the European EMC Directives is a six-chapter text that considers the by-product of the co-existence of all kinds of radio services, called electromagnetic compatibility (EMC). This book discusses the solution to the damaging frequency interference of EMC and the problem of EMC to electronic equipment. The opening chapter considers the effect of adapting the EMC Directives to decrease the economic damage being caused by electromagnetic interference, as well as the analysis, definition, and compliance of EMC and EMC Directives. The next chapters deal with the measurement of EMC; RF emission testing; features of circuits, layout, and grounding; digital and analogue circuit design; and description of interfaces, filtering, and shielding. These topics are followed by discussion of the equipment for mains harmonic emission, the facilities and equipment for measuring RF susceptibility, and the transient susceptibility to ESD. The concluding chapters examine the use of performance criteria in measuring EMC. These chapters describe the features and application of the Fourier spectrum. The book can provide useful information to economists, engineers, radio technicians, students, and researchers.

Data Conversion Handbook

Author : Analog Devices Inc. Analog Devices Inc. Engineeri
Publisher : Elsevier
ISBN 13 : 0080477011
Total Pages : 976 pages
Book Rating : 4.0/5 (84 download)

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Book Synopsis Data Conversion Handbook by : Analog Devices Inc. Analog Devices Inc. Engineeri

Download or read book Data Conversion Handbook written by Analog Devices Inc. Analog Devices Inc. Engineeri and published by Elsevier. This book was released on 2004-12-18 with total page 976 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive handbook is a one-stop engineering reference. Covering data converter fundamentals, techniques, applications, and beginning with the basic theoretical elements necessary for a complete understanding of data converters, this reference covers all the latest advances in the field. This text describes in depth the theory behind and the practical design of data conversion circuits as well as describing the different architectures used in A/D and D/A converters. Details are provided on the design of high-speed ADCs, high accuracy DACs and ADCs, and sample-and-hold amplifiers. Also, this reference covers voltage sources and current reference, noise-shaping coding, and sigma-delta converters, and much more. The book's 900-plus pages are packed with design information and application circuits, including guidelines on selecting the most suitable converters for particular applications. You'll find the very latest information on:·Data converter fundamentals, such as key specifications, noise, sampling, and testing·Architectures and processes, including SAR, flash, pipelined, folding, and more·Practical hardware design techniques for mixed-signal systems, such as driving ADCs, buffering DAC outputs, sampling clocks, layout, interfacing, support circuits, and tools.·Data converter applications dealing with precision measurement, data acquisition, audio, display, DDS, software radio and many more. The accompanying CD-ROM provides software tools for testing and analyzing data converters as well as a searchable pdf version of the text.* Brings together a huge amount of information impossible to locate elsewhere.* Many recent advances in converter technology simply aren't covered in any other book.* A must-have design reference for any electronics design engineer or technician.

Reversals of the Earth's Magnetic Field

Author : J. A. Jacobs
Publisher : Cambridge University Press
ISBN 13 : 0521450721
Total Pages : 357 pages
Book Rating : 4.5/5 (214 download)

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Book Synopsis Reversals of the Earth's Magnetic Field by : J. A. Jacobs

Download or read book Reversals of the Earth's Magnetic Field written by J. A. Jacobs and published by Cambridge University Press. This book was released on 1994-11-24 with total page 357 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 1994 book examines how reversals of the Earth's magnetic field have played a major role in establishing plate tectonics and a geological time scale.

Sun, Earth and Sky

Author : Kenneth R. Lang
Publisher : Springer Science & Business Media
ISBN 13 : 0387333657
Total Pages : 296 pages
Book Rating : 4.3/5 (873 download)

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Book Synopsis Sun, Earth and Sky by : Kenneth R. Lang

Download or read book Sun, Earth and Sky written by Kenneth R. Lang and published by Springer Science & Business Media. This book was released on 2007-12-31 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written in a light and friendly style, this lavishly illustrated book introduces the Sun and its physics, and describes all aspects of the Sun’s interaction with us on Earth. The second edition of this book updates the popular text by providing comprehensive accounts of the most recent discoveries made by five modern solar spacecraft during the past decade. It contains a number of images never before seen in print. Breakthrough observations with the underground Sudbury Neutrino Observatory are also included. The new edition further provides modern interpretations of ozone depletion and global warming.

Health Effects of Low-frequency Electric and Magnetic Fields

Author : ORAU Panel on Health Effects of Low-Frequency Electric and Magnetic Fields
Publisher :
ISBN 13 :
Total Pages : 392 pages
Book Rating : 4.:/5 (359 download)

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Book Synopsis Health Effects of Low-frequency Electric and Magnetic Fields by : ORAU Panel on Health Effects of Low-Frequency Electric and Magnetic Fields

Download or read book Health Effects of Low-frequency Electric and Magnetic Fields written by ORAU Panel on Health Effects of Low-Frequency Electric and Magnetic Fields and published by . This book was released on 1992 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Introduction to Antenna Analysis Using EM Simulators

Author : Hiroaki Kogure
Publisher : Artech House
ISBN 13 : 1608071588
Total Pages : 293 pages
Book Rating : 4.6/5 (8 download)

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Book Synopsis Introduction to Antenna Analysis Using EM Simulators by : Hiroaki Kogure

Download or read book Introduction to Antenna Analysis Using EM Simulators written by Hiroaki Kogure and published by Artech House. This book was released on 2011 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written for novice engineers and engineering students, this easy-to-comprehend resource offers you thorough introductory-level treatment of antenna analysis using electromagnetic (EM) simulators. This richly-illustrated book shows you how to use EM software to analyze and tune wireless antennas to meet specific requirements. You learn important wireless antenna design terminology and gain a detailed understanding of how antennas work. Moreover, the book offers you guidance in troubleshooting problems with wireless antenna designs. This authoritative reference also provides you with a complete overview of the many different kinds of antennas and related EM tools.

The Method of Moments in Electromagnetics

Author : Walton C. Gibson
Publisher : CRC Press
ISBN 13 : 1000412482
Total Pages : 510 pages
Book Rating : 4.0/5 (4 download)

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Book Synopsis The Method of Moments in Electromagnetics by : Walton C. Gibson

Download or read book The Method of Moments in Electromagnetics written by Walton C. Gibson and published by CRC Press. This book was released on 2021-09-06 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Method of Moments in Electromagnetics, Third Edition details the numerical solution of electromagnetic integral equations via the Method of Moments (MoM). Previous editions focused on the solution of radiation and scattering problems involving conducting, dielectric, and composite objects. This new edition adds a significant amount of material on new, state-of-the art compressive techniques. Included are new chapters on the Adaptive Cross Approximation (ACA) and Multi-Level Adaptive Cross Approximation (MLACA), advanced algorithms that permit a direct solution of the MoM linear system via LU decomposition in compressed form. Significant attention is paid to parallel software implementation of these methods on traditional central processing units (CPUs) as well as new, high performance graphics processing units (GPUs). Existing material on the Fast Multipole Method (FMM) and Multi-Level Fast Multipole Algorithm (MLFMA) is also updated, blending in elements of the ACA algorithm to further reduce their memory demands. The Method of Moments in Electromagnetics is intended for students, researchers, and industry experts working in the area of computational electromagnetics (CEM) and the MoM. Providing a bridge between theory and software implementation, the book incorporates significant background material, while presenting practical, nuts-and-bolts implementation details. It first derives a generalized set of surface integral equations used to treat electromagnetic radiation and scattering problems, for objects comprising conducting and dielectric regions. Subsequent chapters apply these integral equations for progressively more difficult problems such as thin wires, bodies of revolution, and two- and three-dimensional bodies. Radiation and scattering problems of many different types are considered, with numerical results compared against analytical theory as well as measurements.

Principles of Inductive Near Field Communications for Internet of Things

Author : Johnson I. Agbinya
Publisher : CRC Press
ISBN 13 : 1000796035
Total Pages : 326 pages
Book Rating : 4.0/5 (7 download)

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Book Synopsis Principles of Inductive Near Field Communications for Internet of Things by : Johnson I. Agbinya

Download or read book Principles of Inductive Near Field Communications for Internet of Things written by Johnson I. Agbinya and published by CRC Press. This book was released on 2022-09-01 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Near field communication devices and the emerging field of Internet of things require efficient short range communication techniques. Classical telecommunication theory however has so far focused on radiating electromagnetic signals which is more suited to terrestrial communication systems. Over the last decade however considerable research and applications of inductive methods have emerged as innovative approaches for secure short range communications by changing the paradigm of an established model of electromagnetic communications. We have witnessed the emergence of embedded inductive medical devices, magneto-inductive waveguides, inductive pots and cooking devices, magneto-inductive sensors, wireless power transfer, inductive hearing aids and the emerging inductive point-to-point communication specifically termed near-field communication (NFC) as used in mobile phones and payment cards to name a few. While there exist a large set of distributed methods and algorithms detailing the design and performances of such applications, a significant gap is observed as a lack of detailed collection of the methods in one place which could be easily understood and used quickly by someone seeking to apply the methods.In this book this missing gap is filled with the required details and the theory of near field communication systems including both the radiating and reactive (energy coupling) near-field systems in addition to the well known far field radiation techniques. The book details the fundamental expressions and design methods which facilitate the creation of near field devices and equipment including embedded biomedical implants. The book contains recent advances in inductive communications, performance, limitations and a collection of applications. It also lays a strong foundation for the application of inductive methods for creating Internet of Things systems.

Multiresolution Frequency Domain Technique for Electromagnetics

Author : Mesut Gokten
Publisher : Morgan & Claypool Publishers
ISBN 13 : 1627050159
Total Pages : 137 pages
Book Rating : 4.6/5 (27 download)

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Book Synopsis Multiresolution Frequency Domain Technique for Electromagnetics by : Mesut Gokten

Download or read book Multiresolution Frequency Domain Technique for Electromagnetics written by Mesut Gokten and published by Morgan & Claypool Publishers. This book was released on 2012 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents a general frequency domain numerical method similar to the finite difference frequency domain (FDFD) technique. The objective of developing this new technique is to achieve a frequency domain scheme which exhibits improved computational efficiency figures compared to the traditional FDFD method.

Light Scattering by Particles

Author : Peter W. Barber
Publisher : World Scientific
ISBN 13 : 9789971508326
Total Pages : 280 pages
Book Rating : 4.5/5 (83 download)

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Book Synopsis Light Scattering by Particles by : Peter W. Barber

Download or read book Light Scattering by Particles written by Peter W. Barber and published by World Scientific. This book was released on 1990 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the separation-of-variables and T-matrix methods of calculating the scattering of electromagnetic waves by particles. Analytical details and computer programs are provided for determining the scattering and absorption characteristics of the finite-thickness slab, infinite circular cylinder (normal incidence), general axisymmetric particle, and sphere.The computer programs are designed to generate data that is easy to graph and visualize, and test cases in the book illustrate the capabilities of the programs. The connection between the theory and the computer programs is reinforced by references in the computer programs to equations in the text. This cross-referencing will help the reader understand the computer programs, and, if necessary, modify them for other purposes.

Spontaneous Current Sheets in Magnetic Fields

Author : Eugene Newman Parker
Publisher : Oxford University Press, USA
ISBN 13 : 0195073711
Total Pages : 435 pages
Book Rating : 4.1/5 (95 download)

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Book Synopsis Spontaneous Current Sheets in Magnetic Fields by : Eugene Newman Parker

Download or read book Spontaneous Current Sheets in Magnetic Fields written by Eugene Newman Parker and published by Oxford University Press, USA. This book was released on 1994 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book expands upon ideas in the author's classic text Cosmical Magnetic Fields. This is the first book-length treatment of the magnetohydrodynamic theory of spontaneous magnetic discontinuities. Most continuous magnetic fields develop internal discontinuities as they relax to equilibrium. The formation of the tangential discontinuities is driven by Maxwell stresses and provides sites for rapid reconnection and dissipation of the magnetic free energy, which is the primary cause of the sun's x-ray emitting corona.

Remote Sensing and GIS: Principles & Applications

Author : Dr. Basavaraja Simpi
Publisher : AG Publishing House (AGPH Books)
ISBN 13 : 9395468599
Total Pages : 225 pages
Book Rating : 4.3/5 (954 download)

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Book Synopsis Remote Sensing and GIS: Principles & Applications by : Dr. Basavaraja Simpi

Download or read book Remote Sensing and GIS: Principles & Applications written by Dr. Basavaraja Simpi and published by AG Publishing House (AGPH Books). This book was released on 2022-08-25 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book on the fundamentals of remote sensing and geographic information systems (GIS) for engineers explores all aspects of the subject matter, including electromagnetic radiation and its interaction with a wide variety of objects, several different sensors and platforms, data processing, the development of data products, and their ultimate use in earth resource monitoring and management. Included are the most current breakthroughs in sensor technology, greater information on image processing and the generation of data products, and applications of remote sensing in domains such as archaeology, desertification, and drought assessment. It provides a thorough understanding of the underlying principles and methodology underpinning remote sensing, geographic information systems, and the applications of these technologies. In recent years, the technology of remote sensing has become increasingly popular for use in mapping and monitoring the earth's resources, as well as in the prevention and management of natural disasters. This is because remote sensing can be used in conjunction with Geographic Information Systems (GIS).

Data Conversion Handbook

Author : Walt Kester
Publisher : Newnes
ISBN 13 : 0750678410
Total Pages : 977 pages
Book Rating : 4.7/5 (56 download)

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Book Synopsis Data Conversion Handbook by : Walt Kester

Download or read book Data Conversion Handbook written by Walt Kester and published by Newnes. This book was released on 2005 with total page 977 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive new handbook is a one-stop engineering reference covering data converter fundamentals, techniques, and applications. Beginning with the basic theoretical elements necessary for a complete understanding of data converters, the book covers all the latest advances made in this changing field. Details are provided on the design of high-speec ADCs, high accuracy DACs and ADCs, sample-and-hold amplifiers, voltage sources and current reference,noise-shaping coding, sigma-delta converters, and much more.

Digital Communications

Author : Mehmet Safak
Publisher : John Wiley & Sons
ISBN 13 : 111909125X
Total Pages : 914 pages
Book Rating : 4.1/5 (19 download)

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Book Synopsis Digital Communications by : Mehmet Safak

Download or read book Digital Communications written by Mehmet Safak and published by John Wiley & Sons. This book was released on 2017-04-17 with total page 914 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a modern textbook on digital communications and is designed for senior undergraduate and graduate students, whilst also providing a valuable reference for those working in the telecommunications industry. It provides a simple and thorough access to a wide range of topics through use of figures, tables, examples and problem sets. The author provides an integrated approach between RF engineering and statistical theory of communications. Intuitive explanations of the theoretical and practical aspects of telecommunications help the reader to acquire a deeper understanding of the topics. The book covers the fundamentals of antennas, channel modelling, receiver system noise, A/D conversion of signals, PCM, baseband transmission, optimum receiver, modulation techniques, error control coding, OFDM, fading channels, diversity and combining techniques, MIMO systems and cooperative communications. It will be an essential reference for all students and practitioners in the electrical engineering field.

Electromagnetic Fields in Biological Systems

Author : James C. Lin
Publisher : CRC Press
ISBN 13 : 1000218694
Total Pages : 460 pages
Book Rating : 4.0/5 (2 download)

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Book Synopsis Electromagnetic Fields in Biological Systems by : James C. Lin

Download or read book Electromagnetic Fields in Biological Systems written by James C. Lin and published by CRC Press. This book was released on 2016-04-19 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spanning static fields to terahertz waves, this volume explores the range of consequences electromagnetic fields have on the human body. Topics discussed include essential interactions and field coupling phenomena; electric field interactions in cells, focusing on ultrashort, pulsed high-intensity fields; dosimetry or coupling of ELF fields into biological systems; and the historical developments and recent trends in numerical dosimetry. It also discusses mobile communication devices and the dosimetry of RF radiation into the human body, exposure and dosimetry associated with MRI and spectroscopy, and available data on the interaction of terahertz radiation with biological tissues, cells, organelles, and molecules.