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Nondestructive evaluation (NDE) sensing has progressed significantly in the past few years. In particular, smart sensors play an increasingly important role in structural damage detection. There is growing progress in the performance of strategic sensors, such as piezoelectric sensors, as well as noncontact sensors, such as air-coupled transducers, magnetic flux leakage sensors and pulsed laser ultrasonic propagation applications. The most progress has been made in the development of application software for all technologies. We are now able to enhance damage resolutions and then focus on damage visualization in many applications. This Special Issue aims to highlight advances in the development, testing, and use of damage visualization tools for smart sensor-based nondestructive evaluations. Topics include, but are not limited to: New developments in smart sensing-based nondestructive evaluations, Magnetic flux leakage sensors, Laser scanning-based ultrasonic propagation sensors, Piezoelectric sensors, Air-coupled transducers, Damage detection and visualization.
Nondestructive testing. --- Magnetic fields. --- Ferromagnetic materials.
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This is a practical book on MEG that covers a wide range of topics. The book begins with a series of reviews on the use of MEG for clinical applications, the study of cognitive functions in various diseases, and one chapter focusing specifically on studies of memory with MEG. There are sections with chapters that describe source localization issues, the use of beamformers and dipole source methods, as well as phase-based analyses, and a step-by-step guide to using dipoles for epilepsy spike analyses. The book ends with a section describing new innovations in MEG systems, namely an on-line real-time MEG data acquisition system, novel applications for MEG research, and a proposal for a helium re-circulation system. With such breadth of topics, there will be a chapter that is of interest to every MEG researcher or clinician.
Magnetoencephalography. --- MEG (Neurology) --- Brain --- Magnetic fields --- Measurement --- Radiology
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Magnetism defines the complex and dynamic solar corona. It determines the magnetic loop structure that dominates images of the corona, and stores the energy necessary to drive coronal eruptive phenomena and flare explosions. At great heights the corona transitions into the ever-outflowing solar wind, whose speed and three-dimensional morphology are controlled by the global coronal magnetic field. Coronal magnetism is thus at the heart of any understanding of the nature of the corona, and essential for predictive capability of how the Sun affects the Earth. Coronal magnetometry is a subject that requires a concerted effort to draw together the different strands of research happening around the world. Each method provides some information about the field, but none of them can be used to determine the full 3D field structure in the full volume of the corona. Thus, we need to combine them to understand the full picture. The purpose of this Frontiers Research Topic on Coronal Magnetometry is to provide a forum for comparing and coordinating these research methods, and for discussing future opportunities.
solar corona --- Solar Activity --- magnetohydrodynamics --- solar flares --- Coronal mass ejections --- Magnetic Fields --- spectropolarimetry --- Sun
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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact
star formation --- magnetic fields --- inter-stellar medium --- molecular clouds --- protostars --- circumstellar disks
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In this book, a variety of topics related to electromagnetic fields and waves are extensively discussed. The topics encompass the physics of electromagnetic waves, their interactions with different kinds of media, and their applications and effects.
Electromagnetic fields. --- Fields, Electromagnetic --- Magnetic fields --- Electric fields --- Engineering --- Physical Sciences --- Engineering and Technology --- Electrical and Electronic Engineering --- Electromagnetism
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Focusing on exposure, induced fields, and absorbed energy, this volume covers the interaction of electromagnetic fields and waves with biological systems, spanning static fields to terahertz waves. Presenting a broad range of topics, the book highlights relevant properties of biological materials and computational techniques and/or experimental methods. Topics discussed include medical devices and systems exposure and dosimetry and mobile communication fields in biological systems. Extensive references are included in each chapter to enhance additional study--Provided by publisher.
Electromagnetism --- Electromagnetic fields. --- Physiological effect. --- Fields, Electromagnetic --- Magnetic fields --- Electric fields --- Electromagnetic fields --- Electromagnetic waves --- Physiological effect
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The book entitled Nonmagnetic and Magnetic Quantum Dots is divided into two sections. In Section 1, the chapters are related to nonmagnetic quantum dots and their applications. More specifically, exact models and numerical methods have been presented to describe the analytical solution of the carrier wave functions, the quantum mechanical aspects of quantum dots, and the comparison of the latter to experimental data. Furthermore, methods to produce quantum dots, synthesis techniques of colloidal quantum dots, and applications on sensors and biology, among others, are included in this section. In Section 2, a few topics of magnetic quantum dots and their applications are presented. The section starts with a theoretical model to describe the magnetization dynamics in magnetic quantum dot array and the description of dilute magnetic semiconducting quantum dots and their applications. Additionally, a few applications of magnetic quantum dots in sensors, biology, and medicine are included in Section 2.
Magnetic fields. --- Magnetic properties. --- Fields, Magnetic --- Field theory (Physics) --- Geomagnetism --- Magnetics --- Solid-State Physics --- Physical Sciences --- Engineering and Technology --- Materials Science --- Semiconductor
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In the present book, various applications of electric field are introduced in health and biology like treating cancer and cell sorting and in engineering and technological applications like enhancing the heat transfer, colloidal hydrodynamics and stability, and lithography. Electric field is defined as a force field arising from the electric charges. Depending on the nature of the material (the ability to polarize) and the inherent or attained surface charges, the response of the electric field varies.
Electric fields. --- Electromotive force. --- Magnetic fields. --- Fields, Magnetic --- Field theory (Physics) --- Geomagnetism --- Magnetics --- Electric potential --- EMF (Electromotive force) --- Force, Electromotive --- Potential, Electric --- Voltage --- Force and energy --- Electromagnetic fields --- Engineering --- Physical Sciences --- Engineering and Technology --- Electrical and Electronic Engineering
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During the past few decades, plasma science has witnessed a great growth in laboratory studies, in simulations, and in space. Plasma is the most common phase of ordinary matter in the universe. It is a state in which ionized matter (even as low as 1%) becomes highly electrically conductive. As such, long-range electric and magnetic fields dominate its behavior. Cosmic plasmas are mostly associated with stars, supernovae, pulsars and neutron stars, quasars and active galaxies at the vicinities of black holes (i.e., their jets and accretion disks). Cosmic plasma phenomena can be studied with different methods, such as laboratory experiments, astrophysical observations, and theoretical/computational approaches (i.e., MHD, particle-in-cell simulations, etc.). They exhibit a multitude of complex magnetohydrodynamic behaviors, acceleration, radiation, turbulence, and various instability phenomena. This Special Issue addresses the growing need of the plasma science principles in astrophysics and presents our current understanding of the physics of astrophysical plasmas, their electromagnetic behaviors and properties (e.g., shocks, waves, turbulence, instabilities, collimation, acceleration and radiation), both microscopically and macroscopically. This Special Issue provides a series of state-of-the-art reviews from international experts in the field of cosmic plasmas and electromagnetic phenomena using theoretical approaches, astrophysical observations, laboratory experiments, and state-of-the-art simulation studies.
cosmic ray knee and ankle --- blazars --- numerical methods --- global jets --- MHD–accretion --- muti-messenger astronomy --- massive star supernovae --- galaxies: active --- TBD --- 26Al --- black holes --- accreting black holes --- particle-in-cell simulations --- kink-like instability --- laser-induced nuclear reactions --- magnetic fields --- magneto-hydrodynamics --- gamma-ray bursts --- active galactic nuclei --- accretion discs–jets --- numerical relativity --- plasma physics --- GRMHD --- high-power laser systems --- radio interferometry --- recollimation shocks --- effective lifetime --- multi-wavelength astronomy --- relativistic jets --- high energy astrophysics --- jets --- active galaxies --- relativistic astrophysics --- helical magnetic fields --- laser plasma --- X-ray binaries --- polarization --- the Weibel instability --- AGN --- neutrino astrophysics --- radiation mechanism: non-thermal --- nuclear astrophysics --- cosmic rays --- mushroom instability --- accretion disks --- MHD winds
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