... of the Transient Electromagnetic ... Descriptors : *COUPLING(INTERACTION), *ELECTROMAGNETIC FIELDS ... PULSES, TRANSIENTS, SCATTERING ...

... Transient Electromagnetic Coupling through Slabs. ... sinusoidal and transient excitations ... STEADY STATE, TRANSIENTS, MATERIALS, TRANSPORT ...

... Descriptors : *AERIAL RECONNAISSANCE, *ELECTROMAGNETIC FIELDS, *GEOPHYSICAL PROSPECTING, TRANSIENTS, MATHEMATICAL ...

... Accession Number : ADA345008. Title : Transient Response of an Electromagnetic Rail Gun: A Pedagogical Model. Corporate ...

... Title : Transient Interaction of Electromagnetic Pulses in Dielectrics and Microwave Biophysics. Descriptive Note : Final rept. ...

... Accession Number : ADA195687. Title : Transient Interaction of Electromagnetic Pulses in Dielectrics and Microwave Biophysics. ...

... Electromagnetic Scattering from Heterogeneous Lossy Spheres. ... HETEROGENEITY, LOSSES, SPHERES, TRANSIENT RADIATION EFFECTS. ...

... of the direct strike. ... Descriptors : *LIGHTNING, *ELECTROMAGNETIC INDUCTION ... ELECTROMAGNETIC FIELDS, DETECTION, ELECTRONIC ...

... Provides detailed search and analysis capabilities across the ... Representation of the Transient Electromagnetic Coupling through a ...

... THESIS PERFORMANCE ENHANCEMENT OF THE NPS TRANSIENT ELECTROMAGNETIC SCATTERING LABORATORY by Aldo E. Bresani ...

... Title : Performance Enhancement of the NPS Transient Electromagnetic Scattering Laboratory. Descriptive Note : Master's thesis. ...

... FLOWMETERS, ACCELERATION, ELECTRONICS, FLOW, TRANSIENTS, FALLING BODIES, WATER, MAGNET COILS, ELECTRODES, SIGNALS ...

A new scheme is proposed, which can treat electromagnetic field of the type-II superconductor under transient temperature field. In the analysis, one of the critical state models, the Bean model was employed to determine the current distribution in the superconductors and effect of magnetic flux flow was also taken into account. The ...

Gravity is usually listed as one of four fundamental forces. This study suggests that energy is exchanged between neutral masses, via a long range electromagnetic force, and that this exchange of energy reproduces the effects of gravity. The mechanism involves transient electric fields, ever present in neutral atoms in consequence of the dynamic ...

The electromagnetic pulse (EMP) produced by a high-altitude nuclear detonation consists of a transient pulse of high intensity electromagnetic fields. These intense fields induce current and voltage transients in electrical conductors. Although nuclear po...

General properties of the solutions to transient electromagnetic scattering problems are described. Electromagnetic field waveforms produced by the scattering of transient plane waves from finite objects are related to those produced by an impulsive plane...

Little quantitative data exists on radiated electromagnetic interference in substations arising from substation transients. The electromagnetic transient noise produced by normal substation activity such as opening switches and breakers can be significant...

Mar 1, 2011 ... A technique by which electromagnetic exciters are controlled to produce specific time-history transient waveforms is discussed.

... Title : Electromagnetic Pulse/Transient Threat Testing of Protection Devices for Amateur/Military Affiliate Radio System Equipment. ...

... therapy and imaging. Electromagnetic transients, potential medical applications, and anticipated research avenues relevant to occupational health ...

... Accession Number : AD0295107. Title : STUDY OF ELECTRO-MAGNETIC PROPAGATION OF A TRANSIENT SIGNAL THROUGH SEA WATER. ...

... Accession Number : AD0258631. Title : STUDY OF ELECTRO-MAGNETIC PROPAGATION OF A TRANSIENT SIGNAL THROUGH SEA WATER. ...

... ABSTRACT The basic theory of airborne EM surveying, in the time donrain, i3 considered. ... borne electromagnetic geophysical surveys. ...

... Title : Modeling and Analysis of ... ELECTROMAGNETIC RADIATION, *TRANSIENT RADIATION ... HYBRID SIMULATION, COUPLING(INTERACTION ...

... across the military departments and agencies for Research ... Title : Component Damage from Electromagnetic Pulse (EMP) Induced Transients ...

Three separate mathematical models are developed in order to examine transient phenomena in railgun plasma armatures. The first model consists of equations for the conservation of mass, momentum, and magnetic induction for an isothermal plasma. Upon departure from equilibrium, the arc length and other arc parameters exhibit damped oscillations about their corresponding ...

... U- ELECTROMAGNETIC PULSE. TESTING ... 11 TITLE fInclude Security Classification) Electromagnetic Pulse Tit Testing of Protection Device; - - ...

Representative data on the electromagnetic environment such as voltage transients and electromagnetic field strengths is provided which can form the basis for immunity specifications. It is presented in terms of the various types of interference sources a...

The paper deals with numerical simulation of plasma vertical position stabilization in ITER. The calculations are performed using EDDY C-2 code by the method of direct numerical simulation of transient electromagnetic processes taking into account the evo...

... TRANSIENT RADIATION EFFECTS, ELECTROMAGNETIC INTERFERENCE, AURORAE, POLAR REGIONS, SPACE ENVIRONMENTS, HIGH ...

... LINES, *ELECTRIC CABLES, *ELECTROMAGNETIC PULSES, * RADIOFREQUENCY CABLES, *COAXIAL CABLES, POLARIZATION, DAMAGE ...

... the safety risks associated with the operation of the Naval Ordnance Transient Electromagnetic Simulator (NOTES) in Pumpkin Neck, Virginia. ...

... Descriptors : *ANTENNAS, COUPLING(INTERACTION ... CIRCUIT ANALYSIS, ELECTROMAGNETIC ... STRUCTURES, TRANSIENT RADIATION ...

... ELECTRIC CABLES, ELECTRIC CONNECTORS, COAXIAL CABLES, ANTENNAS, ELECTROMAGNETIC WAVE FILTERS, TRANSIENTS ...

... ELECTROMAGNETIC RADIATION, SCALING FACTOR, MAXWELLS EQUATIONS, TIME DOMAIN, WAVE EQUATIONS, TRUNCATION. ...

... TM- 3494 DISTORTION AND REGENERATION OF ELECTROMAGNETIC TRANSIENTS AFTER THEIR PROPAGATION AS GROUND WAVES ...

The temporal evolution of electromagnetically induced transparency (EIT) and absorption (EIA) coherence resonances in pump-probe spectroscopy of degenerate two-level atomic transition is studied for light intensities below saturation. Analytical expressions for the transient absorption spectra are given for simple model systems and a model for the ...

This paper presents a new method for solving the transient response problems of electric and magnetic circuits coupled with each other. Using the nodal analysis method the electromagnetic circuits are represented in a tableau form, T X X = b, and are calculated to obtain the geometrical distribution and the time dependence of circuit variables. The tableau ...

The electromagnetic pulse (EMP) from a high-altitude nuclear detonation consists of a transient pulse of high intensity electromagnetic fields. These intense fields induce current and voltage transients in electrical conductors. Although most nuclear powe...

The study of the EMP phenomenon has promoted the development of techniques to investigate transient electromagnetic response data. Characterization of the EMP transient response information is necessary to evaluate the performance of that system in a host...

Electromagnetic effects on ground-based military systems involved in tactical nuclear warfare will be engendered by ionizing radiation, a current density of Compton-recoil electrons in the air, and a nonlinear air conductivity. Many of these systems contain conducting enclosures of one form or another that may house susceptible electronic subsystems. Consequently, the ...

It is shown that massive fermions have their helicity flipped on account of their interaction with an electromagnetic field described by Podolsky's generalized electrodynamics. Massless fermions, in turn, seem to be unaffected by the electromagnetic field...

Abstract: This data set contains time-domain electromagnetic (TEM) soundings ... center of the transmitter loop, layered-earth model best fitting the data. ...

... Characterization of Saltwater Intrusion in South Florida Using Electromagnetic Geophysical Methods, report, 18th Salt Water Intrusion Meeting, ...

This data set contains time-domain electromagnetic (TEM) soundings collected at 63 sites in and near Everglades National Park. The data set includes the ... ...

... VOLUME II1 TEST DATA CD ELECTROMAGNETIC PULSE TESTING OF PROTECTION DEVICES SECTION 6 EQUIPMENT AND DEVICES ...

... TPM), part of the PASP Plus experiment aboard the APEX spacecraft, is designed to detect and characterize electromagnetic transient signals ...

Contents: Transient Processes in Transmission Lines; Transient Processes in Transmission Lines with the Discrete Heterogeneities. Transformation of Pulses; Impulse Shaping in Linear Distributed Circuits; Impulse Shaping from the Shock Electromagnetic Wave...

... that the highest transient voltage transmitted through a residential power distribution breaker box ... U 11 their electric insulation. ... Power connections ...

We present two novel, fully three-dimensional (3-D) finite-difference time-domain (FDTD) schemes in cylindrical coordinates for transient simulation of electromagnetic wave propagation in complex (inhomogeneous, dispersive, and conductive) and unbounded media. The proposed FDTD schemes incorporate an extension of the perfectly matched layer (PML) absorbing ...

A computer program for three-dimensional transient analyses of welding processes has been modified for use on massively parallel computers. The model is based on discrete element method that takes into account geometric variations of an object, heat transfer, fluid flow, deformable free surface, solid/liquid interface, buoyancy, ...

The development of nuclear EMP hardness requirements must account for uncertainties in the environment, in interaction and coupling, and in the susceptibility of subsystems and components. Typical uncertainties of the last two kinds are briefly summarized, and an assessment methodology is outlined, based on a probabilistic approach that encompasses the basic concepts of ...

The cylindrical antenna, driven at its center by some transient voltage input and symmetrically loaded with lumped resistors, has been found to be a useful electromagnetic pulse generator. In a previous study, a procedure was developed for selecting resis...

Induction theorem is used to formulate the problem of transient electromagnetic excitation of a rectangular cavity through an aperture. New variables are introduced to convert the governing second-order differential equation into a set of first-order equa...

The paper is concerned with the generation of transient electromagnetic force and its application to metal working processes as forming force. The main purposes are to get the higher formability and accuracies of deformed parts comparing with conventional...

The receiving and transmitting properties of small linear antennas, conical antennas, and loops for transient electromagnetic fields were investigated experimentally. Short electrical dipoles loaded by a capacitance represented by a cathode follower can b...

Analytical and numerical techniques were developed for modeling transient electromagnetic wave propagation in dispersive dielectrics. Time domain asymptotic techniques were used to understand the decay of pulses in such media and to develop energy estimat...

This report describes the various techniques and algorithms developed to enhance the accuracy of the measurements of very fast transient electromagnetic fields generated during EMP testing. Some fundamentals of digital signal processing are presented and ...

Analysis of Transient Electromagnetic Scattering from Two-Dimensional Open-Ended Structures by Numerical Inversion of Laplace Transform

... Accession Number : ADA308099. Title : Wideband Signal Analysis and Synthesis Applied to Electromagnetic Transient Waveforms. ...

... RADIOBIOLOGY, TRANSIENTS, DIELECTRIC PROPERTIES, NERVE CELLS, MUSCLES, THERMAL STRESSES, FROGS, EAR, RADIATION ...

... transient fields as they propagate over the earth's surface has a long history; Sommerfield considered the propagation of radio waves over an ...

... The production and acceleration of plasma toroids is essentially a transient process ... t A bundle of incoherent fiber optics were stationed at the exit of ...

... of the theoretical models used to predict the inductance gradient, the transient behavior of the currents produced in the rail gun structure, the ...

A consequence of an exoatmospheric nuclear burst is an electromagnetic pulse (EMP) radiated from it.

... PROPERTIES, *SUPERSONIC FLOW, *TRANSIENTS, AIRFRAMES, BEAMS(ELECTROMAGNETIC), BEAMS(STRUCTURAL), BLUNT BODIES ...

... Report Date : 27 MAR 1968. Pagination or Media Count : 228. Abstract : A linear system analysis is applied to electromagnetic scattering problems. ...

... physical insight into the coupling of radiated ... determine how the wire transients will change ... approach involved frequency domain analysis based on ...

... Title : Bandwidth and Signal-to-Noise Ratio Enhancement of the NPS Transient Electromagnetic Scattering Laboratory. ...

... Abstract : Partial Contents: A Finite Element Analysis of Lightning Induced Maxwell Current Densities; Transient Electromagnetic Coupling To A ...

Transient electromagnetic fields (dirty electricity), in the kilohertz range on electrical wiring, may be contributing to elevated blood sugar levels among diabetics and prediabetics. By closely following plasma glucose levels in four Type 1 and Type 2 diabetics, we find that they responded directly to the amount of dirty electricity in their environment. ...

The ZR accelerator is a refurbishment of Sandia National Laboratories Z accelerator [1]. The ZR accelerator components were designed using electrostatic and circuit modeling tools. Transient electromagnetic modeling has played a complementary role in the analysis of ZR components [2]. In this paper we describe a 3D transient ...

of Equation (2) can be thought of as the sensitivity for the measurement of the transient electric field at rOptimizing Electric Dipole Source, Transient Electromagnetic Data Acquisition Configuration Using In the past few years, there has been a growing interest in the electric dipole source electromagnetic (EM

The Electromagnetic Transients Program (EMTP) is a computer program used to simulate electromagnetic, electromechanical, and control system transients on multi-phase electric power systems. Section headings in this volume include the following: Ideal Sour...

The Electromagnetic Transients Program (EMTP) is a computer program used to simulate electromagnetic, electromechanical, and control system transients on multiphase electric power systems. Section headings in this volume include the following: HVDC Model Applications; Frequency Dependent Network Equivalents (FDNE); ...

The wavelet transform is introduced as a method for analyzing electromagnetic transients associated with power system faults and switching. This method, like the fourier transform, provides information related to the frequency composition of a waveform, but it is more appropriate than the familiar Fourier methods for the non-periodic, wide-band signals ...

In modeling electromagnetic responses, Maxwell's equations in the frequency domain are popular and have been widely used (Nabighian, 1994; Newman and Alumbaugh, 1995; Smith, 1996, to list a few). Recently, electromagnetic modeling in the time domain using...

A single, high-altitude nuclear detonation over the continental United States can expose large geographic areas to transient, electromagnetic pulse (EMP). The initial electromagnetic fields produced by this event have been defined as high-altitude electro...

The response of an object subjected to high energy, transient electromagnetic (EM) fields sometimes called electromagnetic pulses (EMP), is an important issue in the survivability of electronic systems (e.g., aircraft), especially when the field has been ...

... at the Massachusetts Institute of Technology's Laboratory for Electromagnetic ... The GTG model takes into account basic physical characteristics of ...

This technical report discusses the vulnerability of equipment used by amateur/MARS radio operators in the United States to disruption or damage by transient electromagnetic effects such as lightning, voltage surges, and electromagnetic pulse (EMP) waves....

The operation and hardware of the Lawrence Livermore Laboratory's transient-electromagnetics (EM)-measurement facility are described. The transient-EM range is useful for determining the time-domain transient responses of structures to incident EM pulses. To illustrate the accuracy and utility of the EM-measurement ...

The paper presents experimental observations from which the characteristics of disconnect switch-generated transients are deduced. The measurements show that the very fast rise times associated with these transients give rise to abnormally low volt-time c...

The broadband electromagnetic pulse (EMP) transient measurement preemphasis filter ( Filter ) was developed to improve the signal-to-noise ratio in the high-frequency portion of single-pass EMP transient response measurements. Improvements of 12 dB and mo...

The electromagnetic environment near lightning and thunderstorms and the induced effects of this environment on aircraft wiring was measured as part of Project Thunderstorm (TRIP-76). Instrumentation consisted of an externally mounted transient electric f...

A new procedure, based on a combined frequency- and time-domain approach, is presented for the transient analysis of dissipative power networks with nonlinear loads described by monotone characteristics. Special care is paid to the solution of the network transient equations in case the line-sections are closed on protective devices such as varistors. ...

Measurements and characterization of fiber optics in radiation environments are considered, taking into account material dispersion measurements on fiber optic cables used at the Nevada Test Site, gamma-ray to Cerenkov light conversion efficiency for pure-silica-core optical fibers, the measurement of transient radiation effects in optical fibers, optical ...

Electromagnetic finite element analysis was used to model the 2D instantaneous heating effects under a Bath University MEGA electromagnetic FE program. A full 3D coupled electromagnetic heating model based on the MEGA electromagnetic finite element code is described.

In the framework of the French-Ivorian participation to the IEEY, a network of 10 electromagnetic stations were installed at African longitudes. The aim of this experiment was twofold: firstly, to study the magnetic signature of the equatorial electrojet on the one hand, and secondly, to characterize the induced electric field variations on the other hand. The first results of ...

A complete, three phase transformer model for the calculation of electromagnetic transients is presented. The model consists of a set of state equations solved with the trapezoidal rule of integration in order to obtain an equivalent Norton circuit at the transformer terminals. Thus the transformer model can be easily interfaced with an ...

We report theoretical and experimental studies of the propagation of a square-modulated laser pulse through a laser-cooled atomic ensemble of two-level absorbers, as well as through a three-level system with electromagnetically induced transparency. We find that the transmission characteristics over a wide range of optical depth can be fully accounted for ...

... However, the electromagnetic ultrasonic transduction of SH-waves in electrically conductive ... account is given on the detection of corrosion in bottom ...

Propagation model for the electromagnetic field that accounts for the clutter and metallic objects in the sea. Computationally fast, and the complete work will include electromagnetic propagation models and vector antennas.

The propagation of electromagnetic waves in plasma is investigated, taking into account variations in the electron mean free path in the plasma. (T.F.H.)

This paper provides a comprehensive account of analytical results for computing electromagnetic fields that are induced by ocean sea water as a result of its motion relative to the geomagnetic field. The emphasis is on the characterization of magnetic fie...

... wide frequency range usually implies bulky electric absorber or heavy ... accounts for the surface waves which are predicted by electromagnetic wave ...

Induction motors form a considerable portion of industrial loads; hence, the analysis of their performance is often required in system studies. The analysis is either concerned with steady-state performance, or with transient performance during start-up and during system disturbances. The Electromagnetic Transients Program (EMTP) is ...

In modern high-energy physics, a powerful electromagnetic field must be supplied for some elementary particles to be accelerated by passing through the region of high-energy physics fields. The electric current and high voltage producing the powerful electromagnetic field are very important to high-energy accelerators, but the insulation of ...

Power system simulations are roughly classified into the two categories, effective-value-based simulations and electromagnetic transient simulations. The former are usually long-term simulations of a large power system considering the electro-mechanical dynamics and include for instance transient stability simulations. On the other ...

A rigorous solution for transient propagation of electromagnetic waves through a medium has been found. Because of this rigorousness, the solution exhibits apparent consistency with Einsteinian causality. Thus, it is confirmed that faster-than-light or superluminal propagation of electromagnetic waves is not possible. Evanescent ...

The authors construct a mathematical model, using the terminology of quantum mechanics and magnetic resonance, of the transient effects in the parametric excitation of system of particles with spin in a constant electromagnetic field in the laboratory-coordinate system. Their Hamiltonian describes the interaction of particles with a sequence of pulsed ...

Results are reported of a project designed to reduce the magnitude of transient high-frequency electromagnetic field disturbances near 230-kV line disconnect switches by structural shielding. A reduction in peak transient electric fields from 600 volts per meter to an equipment specification value of 1 volt per meter at the site of a ...

Response of a Tall Object to Lightning Vladimir A. Rakov Abstract--Experimental data showing the transient behavior of tall objects struck by lightning are reviewed. The influence of this transient behavior, illustrated by simple calculations, on measured lightning current and measured remote electromagnetic fields

... It is shown that for a bottom-mounted receiver and almost normal incidence, distortion of a 244-Hz transient signal envelope can be accounted for if ...

The electromagnetic flowmeter is based on the discovery by Faraday that currents are induced in a conductor which changes its position relative to a magnetic field. The theoretical relations concerning the potential field induced in a flowmeter are considered, taking into account the Neumann problem and the Dirichlet problem. Attention is also given to the ...

The paper describes an economic alternative to the conventional design of a hydro power station which feeds power into a hvdc transmission line. A methodology is developed to operate hydraulic turbines under variable speed to maximize the turbine efficiency taking the loading and water head conditions into account. A 10x100 MW unit connected hydro power station is analyzed. A ...

The metallurgical structure of superalloys refined by Vacuum Arc Remelting (VAR) is determined by the behavior of the liquid metal pool that exists at the top of the ingot, which is in turn affected by fluid dynamics, heat transfer, electromagnetics and solidification. In this study, we examine the behavior of the liquid metal pool by constructing a coupled multi-physics model ...

Compton electrons generated in air by gamma rays produced by nuclear explosions are known to cause transient electromagnetic fields called the electromagnetic pulse (EMP) or radioflash. The average forward range of the Compton electrons in air is a princi...

We present a highly simplified model of an electromagnetic rail gun. The energy source for the gun consists of a rotating magnetic dipole moment positioned at the center of a stator coil. The dipole moment is free to rotate about an axis normal to the sta...

Analysis of source-excited time-harmonic and transient electromagnetic wave propagation in complicated environments, wave scattering by complicated targets, or wave penetration into complex structures generally requires decomposition of the incident field...

A nuclear detonation in or above the earth's atmosphere produces an intense electromagnetic pulse (EMP). A large portion of the EMP electromagnetic energy is within the RF spectrum. A detonation at high altitudes above 40 km produces an EMP called high-al...

An assessment of the susceptibility of protective relays to the transients produced by high-altitude electromagnetic pulse (HEMP) events is presented in this paper. Several mechanisms responsible for coupling of HEMP to relay terminals are examined. The p...

We survey the phenomenon of pair production by the transient electromagnetic fields produced in relativistic heavy-ion collisions, as it impinges upon atomic, nuclear, and particle physics, and the design of accelerators and detectors. The subject is natu...

The electromagnetic pulse (EMP), one of the effects of the detonation of a nuclear weapon, consists of a transient wave of intense electric and magnetic fields. These intense fields can cause malfunction or damage to electrical and electronic equipment ex...

The application of filters for the protection of electrical equipment from electrical transient signals induced by high-altitude electromagnetic pulse (HEMP) is discussed, and the application of filters to ac and dc power supplies and analog and digital s...

To survive the intense electromagnetic fields associated with a lightning strike, proper design of aircraft electrical control systems requires knowledge of the transient current pulse associated with a lightning strike. This report summarizes in-house te...

This research investigates the possibility of applying exponentially curved conducting plates to single-element Transverse Electromagnetic (TEM) horns and their transient arrays to enhance the UWB characteristics already experienced by these radiators. Th...

The objective of this study was to determine the effects of lightning on solar photovoltaic systems in the 100 kilowatt to 1 Megawatt power range, and to determine methods for protecting these systems from lightning. The photovoltaic systems and their lig...

The Long Arc Lightning Simulator is part of the Electromagnetic Transient TE Facility (EMTEF), located at Patuxent River, Md. The Long Arc Simulator is operated by the EM Transient's Branch of the E3 division and is part of the DOD Major Range Test Facili...

We present consistent transient theory of lasing without inversion and show by numerical analysis that pulse-mode lasing is feasible in a two-level system with split upper levels coupled by an external high-frequency electromagnetic field.

Lower-bound estimates are obtained for the error of measurement of the parameters induced in a vibratory system with electromagnetic energy conversion in the transient regime. These estimates can be used to determine the possible reserves for increasing the accuracy (or resolving power) of devices for the nondestructive monitoring of materials and ...

The effect of the components of a transient suppressor on the protective function, of the device were studied. Measurements show that the operation of the gas tubes requires low inductive connectors. An injected pulse with a rate of rise of 20 A/nsec ligh...

This brief is a tutorial introduction to transient electromagnetics, focusing on direct time-domain techniques. Physical, mathematical, and numerical aspects of time-domain methods are examined, with emphasis on wire objects excited as antennas or scatter...

... Electromagnetic and Radar Department Using roughness textures in target modelling. ... Taking into account the statistical surface roughness ...

By taking into account the singularity of the dyadic Green's function in the renormalization method,

of the coaxial plasma gun, taking into account the skin depth due to the pulsed nature of the current, b and a are the outer and inner ...

performed with the MIT electromagnetic equation propagation MEEP freeware.20 Calculations account for the Si

... The solu- tion is complete as it accounts for all substrate effects and mutual coupling. It demonstrates 90,10 23 02 - Page 2. ...

Notice in the illustration above, visible light accounts for a small part of the electromagnetic spectrum. Consider this in the historical context of asteroid research: ...

Transient Waveform Control of Electromagnetic Test Equipment .... is only the identity of the pair of regions characterized by the smallest measure of dissimilarity. ... sensitivity of magnetism have been under development for hide ...

Electromagnetic pulses from nuclear weapons, lightning, and electrostatic discharge are three examples of electrical overstress. Such overstress can cause failure, permanent degradation, or temporary malfunction (upset) of electronic devices and systems. ...

... sources of electromagnetic energy to model the VLSI chip. ... Because the effects of diffraction during proximity-print x-ray lithography are of ',' MIC ...

... US Government Printing Office, Washington, DC, 1076. Morrison, HF, RJ Phillips, and DP O'Brien, Quantitative interpretation of transient ...

... models of the transient 3D, fully coupled ... SAPIV-A Structural Analysis Program for ... Response of Linear Systems." Earthquake Engineering Research ...

outside the borehole. The borehole must be cased with non-conducting material such as PVC. Induction logs provide very detailed resistivity-depth information within the vicinity...

The purpose of this study is to systematically identify and analyze the safety risks associated with the operation of the Naval Ordnance Transient Electromagnetic Simulator (NOTES) in Pumpkin Neck, Virginia. NOTES initiates an extremely short duration ele...

The study of the EMP phenomenon has promoted the development of techniques to investigate transient electromagnetic response data. Characterization of the EMP transient response information is necessary to evaluate the performance of that system in a hostile environment. An efficient technique to characterize this performance is to fit ...

. Pozar, Microwave Engineering, Wiley #12;14 February 2003 30 Basic System Architecture � System architecture

Subject Terms: CONFERENCES; DIGITAL COMPUTERS; ELECTROMAGNETISM; ELECTRONIC EQUIPMENT; FOURIER TRANSFORMATION; REAL TIME OPERATION; WAVEFORMS ...

TO 1 .O AMPERE WITH INTERNAL DIODE FOR COIL TRANSIENT .... semiconductors shall be in accordance with MIL-STD-750, method 2073 or 2074. ...

... from Noisy Transient Electromagnetic Measurement," Lawrence Livermore Laboratory, Submitted for Nuclear E Meeting, Anaheim, California, 5-7 ...

... surfaces residing in an unbounded homogenous medium. ... of the three- dimensional (3D) transient fields in terms of propagating plane waves. ...

... Volume III (1298 pages) contains the raw test data in the form of oscilloscope photographs attached dto the test data sheets for both test programs ...

The radiated fields of an electromagnetic pulse (EMP) simulator are of interest for various reasons, the most obvious being that of surveillance. The thesis represents the first in a group of proposed studies that will estimate the radiated fields of vari...

... 9 NFPA document #77, "Static Electricity 1977," states in ... Electromagnetic Pulse (EMP) Induced Transients." Harry Diamond Laboratories Report No ...

T. Kashiwa,. N. Yoshida, and I. Fukai,. "Transient analysis of a magnetized plasma in three-dimensional space,". IEEE. Trans. Antennas. Propag. ...

The composition of ground fault transients, i.e. charge, discharge and interline compensating components, is first discussed. For transient analysis, a new two frequency model is introduced, which takes into account the interdependence of charge and disch...

This paper describes the characteristics of synchronous machines� damper circuit on transient condition. The authors analyze load rejection case and starting condition in point of the transient reactance saturation by finite element method (FEM) and simulation using the electromagnetic transients program ...

This paper reports on a simulation of a MHO distance relay developed to study the effect of its operation under various system conditions. Simulation is accomplished using a state space approach and a modeling technique using ElectroMagnetic Transient Program (Transient Analysis of Control Systems). Furthermore, simulation results are ...

The United States Army is making changes in the Officer Education System (OES) for officers in the ranks between 2nd lieutenants and major. These changes affect the size of Transient, Holdee and Student account (THS). The current Officer Basic Course will...

... model is multinomial in structure, and we could fit it directly using maximum likelihood. However, to account for possible covariates on encounter ... r-project.org, accessed 1 Aug 2010). We fit transient...

... by Joint Forces Staff College from 1985 ... is grave concern that retention and recruiting ... of Trainees, Transients, Holdees and Students accounts and ...

... It has been named the SOCRATES code, which is an acronym for Shuttle Orbiter Contamination Representation Accounting for Transiently Emitted ...

... used in conjunction with the Spacecraft Orbiter Contamination Representation Accounting for Transiently Emitted Species (SOCRATES) flow-field ...

... However, biotic assimilation and transient storage can account for a significant portion of the nitrate uptake versus denitrification. ...

... Abstract : This paper presents the result of the SOCRATES (Shuttle Orbiter Contamination Representation Accounting for Transiently Emitted ...

... Title : An Analysis of the Impact of Changes in the Officer Education System on the Army's Transient, Holdee, and Student Account. ...

In this dissertation the implementation of high order surface impedance boundary conditions for finite difference time domain method is reported. Up to the present time this method has been limited to low order approximation, which is suitable only for planar surfaces. This work extends the method to include curved surfaces by taking into account tangential diffusion of ...

It is well known that one of the main advantages of the high speed forming (HSF) processes is the improvement in the forming limits of the used materials.Using the Electromagnetic Forming (EMF) technology two materials have been tested with different mechanical and physical properties: the AA5754 aluminium and the AZ31B magnesium alloys.The EMF process principle can be ...

It is well known that one of the main advantages of the high speed forming (HSF) processes is the improvement in the forming limits of the used materials. Using the Electromagnetic Forming (EMF) technology two materials have been tested with different mechanical and physical properties: the AA5754 aluminium and the AZ31B magnesium alloys. The EMF process principle can be ...

The article discusses electromagnetic processes occurring in ac/dc power converters. The study is based on a general equation which describes both transient and steady-state processes. In terms of symmetric transient processes, (1) calculations are made for the current at the beginning of the n-th repetition period, (2) an equivalent ...

The recent advances in computer technology and associated software have introduced new concepts and techniques into the traditional classroom environment of engineering education. WEMAP, an electromagnetic analysis computer code, is a part of a new breed of computer aided engineering tools for teaching electromagnetics to power engineering students. WEMAP ...

This paper deals with the rare high intensity electromagnetic pulses associated with earthquakes, whose spectrum signature differs from that of atmospherics produced by lightning discharges. On the basis of actual data records, cases of the generation of anomalous seismo-electromagnetic emissions are described. These natural sub-millisecond ...

Lately, there has been a mounting concern about the electromagnetic compatibility of nuclear-power-plant systems mainly because of the effects due to the nuclear electromagnetic pulse, and also because of the introduction of more-sophisticated and, therefore, more-susceptible solid-state devices into the plants. Questions have been raised about the ...

We study the possible mechanism of the separatrix destruction during the transient in the linear accelerator. This effect is due to the parametric resonance of the beam in the longitudinal plane caused by the perturbations of electromagnetic field. The magnitude of time-space perturbations of the electromagnetic field depends on the ...

A method of evaluating test effects upon electromagnetic relays through the analysis of their transient response by means of generalized operate and release curves is presented. The curves are developed and units of measure discussed. Effects of circuit parameters, manufacturing tolerances, and stability of adjustment are examined in terms of the ...

The high-altitude detonation of a nuclear device over the continental United States can expose electric utility power systems to intense, transient electromagnetic pulses (EMP). In addition to the initial transient fields designated as early-time, high-al...

This report describes a Fast-Turnoff Transient Electromagnetic (TEM) study at the Pe�a de Hierro ("Berg of Iron") field area of the Mars Analog Research and Technology Experiment (MARTE), near the towns Rio Tinto and Nerva, Andalucia region, Spain.

A ground transient electromagnetic sounding method was evaluated for the detection of salt water-fresh water interfaces along the Gulf Coast of Florida. Seventy-nine soundings were completed utilizing either 80 x 80 meter or 160 x 160 meter horizontal tra...

This document is an outgrowth of a survey and analysis of Electromagnetic Transients Program (EMTP) user needs, in which improved user's documentation was determined to be the single most important enhancement to the EMTP. The Application Guide covers EMTP models and studies, with many examples and typical data. The Application Guide is part of a ...

This document is an outgrowth of a survey and analysis of Electromagnetic Transients Program (EMTP) user needs, in which improved user's documentation was determined to by the single most important enhancement to the EMTP. The Primer is an EMTP training manual for new users. It includes introductory material and eleven sample studies so that the ...

The practical use of the TEM sensing method in China and India is described. In this electromagnetic process, the electrical resistance and the thickness of geological structures can be measured with high accuracy down to great depths. As geophysical stan...

An analytical study and EMTP (ElectroMagnetic Transient Program) implementation for calculation of overvoltages in three-phase inductive circuits are compared. Capacitive and/or inductive couplings between phases are included in schemes with grounded and ...

. Power system models are mainly developed using electromagnetic transients program (EMTP) while relay, October 2005. [5] T. S. Sidhu, "Relay software models for use with electromagnetic transient analysis for automated analysis of protective relay operations. For each environment, the test requirements, test

This book is concerned with wave propagation in reacting media, specifically in electromagnetic materials. An account is presented of the mathematical methods of wave phenomena in electromagnetic materials. The author presents the theory of time-varying electromagnetic fields, which involves a discussion of ...

Little quantitative data exists on radiated electromagnetic interference in substations arising from substation transients. The electromagnetic transient noise produced by normal substation activity such as opening switches and breakers can be significant. Additionally, abnormal events such as faults cause similar ...

The Lawrence Livermore National Laboratory is characterizing antennas in their environments from transient reflectometry and scatter data taken on an Electromagnetic Transient Facility (EMTF). This paper describes the linear-system ARMAX modeling of the entire EMTF and derivation of the frequency-domain equivalent circuit of an antenna ...

The propagation of short electromagnetic pulses in an ionized medium and the reflection of transient pulses from bounded ionized regions is discussed. Analyticai expressions for transient oscillations in reflected and propagated electromagnetic fields excited by a unidirectional pulse are derived for certain ...

In general, the earth is assumed to be perfect (i.e., soil electrical resistivity zero) for the time-domain analysis of the propagation of electromagnetic transients on overhead lines. Under this assumption, the computed electromagnetic transients, neglecting conductor losses, would travel without distortion and ...

Transient electromagnetic fields (dirty electricity), in the kilohertz range on electrical wiring, may be contributing to elevated blood sugar levels among diabetics and pre-diabetics. By closely following plasma glucose levels in four Type 1 and Type 2 diabetics, we find that they responded directly to the amount of dirty electricity in their environment. ...

A time-stepping finite-element (FE) and boundary-element (BE) coupling method was implemented to include 3D transient eddy current under electromagnetic heating effects in electromagnetic launchers. Lagrangian formulations were used to model electromagnetic and thermal diffusive processes with moving conductors. ...

A set of scaling laws relating three potential electromagnetic coupling quantities to three electromagnetic pulse (EMP) characteristics is derived. The electromagnetic coupling quantities attempt to characterize in a very rough sense the ability of an electromagnetic wave to induce an electronic upset in an ...

- main electromagnetic soundings is a well-documented phe- nomenon in the geophysical literature. While A THE SOURCE OF THE BIBLIOGRAPHY @ARTICLE{Weidelt1982a, author = {P. Weidelt}, title = {Response characteristics of coincident loop transient electromagnetic systems}, journal = {Geophysics}, year = {1982

This report is part of a three volume set that presents the results of simulated High-Altitude Electromagnetic Pulse (HEMP) testing of a DMS-100 Switching System. This volume describes the post test analysis of the measured electromagnetic fields and induced transients. This volume also includes a comparison of the characteristic ...

, Electromagnetic Waves Appl., vol. 5, pp. 93-112, 1991. [2] S. M. Rao and T. K. Sarkar, Time domain modeling of twoAnalysis of Electromagnetic Scattering by an Object Located on a Rough Surface Using Time-DomainM-IDFT, Transient Scattering. 1. Introduction Time-domain integral equation (TDIE) techniques possess a number

The Electromagnetic Transients Program (EMTP) is a computer program for the simulation of electric power system transient phenomena. The program provides a large set of device models permitting accurate modeling of power system components over a wide frequency range. Traditionally, this program has existed only in mainframe and ...

The electromagnetic pulse (EMP) from a high-altitude nuclear detonation consists of a transient pulse of high-intensity electromagnetic fields that induce current and voltage transients in electrical conductors. Although most nuclear power-plant cables are not directly exposed to these fields, the attenuated EMP ...

The application of filters for the protection of electrical equipment from electrical transient signals induced by high-altitude electromagnetic pulse (HEMP) is discussed, and the application of filters to ac and dc power supplies and analog and digital signal inputs is described. The application of filters is demonstrated for different types of filters; ...

A Z-transform model, which combines transformer frequency-dependent short-circuit impedances with gain functions, is presented. It sets up a relationship between transient voltages and currents on both sides of a transformer winding pair. The model can be used to calculate impulse responses of the transformers with open-circuit secondary winding as well as those connected to ...

Plasma, vapor and debris associated with an impact or explosive event have been demonstrated in the laboratory to produce radiofrequency and optical electromagnetic emissions that can be diagnostic of the event. Such effects could potentially interfere with communications or remote sensing equipment if an impact occurred, for example, on a satellite. More seriously, impact ...

The resistivity layering of ground can be obtained by measuring the transient fills of non-grounded loops or grounded line transmitters carrying current step functions. Transient soundings have been used for some time for exploration objectives to depths in excess of 500 m, for example: mapping of buried channels for hydrogeology and for major resource ...

state transients in- cludes phase shifting measurements in a two-level system 17 , fluorescence and dressed bases is given in 10 . Because we measure probe absorption, which is proportional to bc(t) , we changes transiently to absorption as the probe begins to resonantly monitor a transition to a dressed

with regenerative braking, when the turn-on angle on is increased to make most of the phase current appear in the 0 reluctance motors, the response during transients, which may occur during sudden load changes or braking, has start-up, braking, and sudden load change remains unknown. In some circumstances, the transient

The behavior of the frequency and transient responses of the magnetic field created by currents in conducting bodies is considered. It is assumed that the surrounding medium is an insulator. The relation between the low-frequency part of the frequency spectrum and the late stage of the transient response depends on the type of conductor. These responses ...

MODELS is a general-purpose symbolic language recently implemented in the ElectroMagnetic Transients Program (EMTP). This tool offers a new approach for observing and controlling a system represented by an EMTP code and provides a great flexibility for performing numerical and logical manipulations of variables. This paper outlines some of the main ...

A program for the fast simulation of electromagnetic and hadronic showers using parameterizations for the longitudinal and lateral profile is described. The fluctuations and correlations of the parameters are taken into account in a consistent way. Comparisons with data over a wide energy range are made. 15 refs., 17 figs.

A calculation of kinetics of nuclear-electromagnetic shower attenuation with an account for charmed hadrons is given. Charmed hadrons present in a shower at super-high energies change the picture of the nuclear-electromagnetic cascade attenuation. The eff...

Solitons of envelopes of circularly polarized electromagnetic waves in a hot, magnetized plasma are studied. Ponderomotive and relativistic nonlinearities are taken into account. The regions in which low-amplitude solitons, which correspond to compressional or rarefaction waves, exist are determined.

A method for investigating electromagnetic waves in a medium with spatial dispersion, which is more refined than the method proposed by Ginzburg, is presented. Expansions of the > and > spatial dispersions were obtained. (tr-auth)

An accurate determination of the electromagnetic scattering cross section of many realistic targets must account for their being multi-dimensional and penetrable by the incident EM wave. An existing volume integral equation formulation of EM fields within...