1. Estudio de la desacomodación magnética en granates de hierro-ytrio policristalinos - Torres Cabrera, Carlos
Edición digital a partir del texto original de la tesis doctoral.

2. The Phase Free, Longitudinal, Magnetic Component of Vacuum Electromagnetism - Escuela De F'isica,Electromagnetism Chubykalo,M. W. Evans,R. Smirnov-rueda
A charge q moving in a reference laboratory system with constant velocity V in the X-axis produces in the Z-axis a longitudinal, phase free, vacuum magnetic field which is identified as the radiated B (3) field of Evans, Vigier and others. PACS numbers: 03.50.De, 03.50.Kk Typeset using REVT E X Department of Physics and Astronomy, York University, North York, Toronto, Canada y Instituto de Ciencia de Materiales, C.S.I.C., Madrid, Spain Several inferences have converged recently on the renewed conclusion that vacuum electromagnetism is three dimensional, not transverse as in the received view. The problem of longitudinal electromagnetic field components in vacuo has been put forward by Majorana [1], Dirac [2], Oppenheimer [3] and Wigner [4], who...

3. Electromagnetism in Gravitational Collapse - Skinfill, Craig Ernest 1975-
A numerical approach to including electromagnetism with general relativity is developed using GRAXI as a starting point. We develop a mathematical model describing electromagnetism coupled to a scalar field in an evolving axisymmetric spacetime. As there are numerous formulations of electromagnetism, we evalute different formulations in a limited flat space case. The full curved space system is then developed, using the flat case as a guide to implementing electromagnetism. This model is then implemented using GRAXI as a code base.

4. Electromagnetism For Mechatronics - Turowski; Electromagnetism For Mechatronics
INTRODUCTION Mechatronics is an interdisciplinary body of ...knowledge that was developed, to a great extent, in mechanical engineering departments and other non-electrical departments, as well as in the more nonelectromagnetic university specialisations. It is considered as especially essential for the engineering environment of the next millennium [1]. In a paper by Rizzo et al., the definition adopted by the International Federation for the Theory of Machines and Mechanism (IFTMM) is presented. It states that ...Mechatronics is the synergistic combination of precision mechanical engineering, electronic control and systems thinking in the design of products and manufacturing processes [2]. As presented in...

5. Electromagnetismo computacional aplicado al diseño de antenas de microtira - Hurtado, Martín; Facultad de Ingenieria
En este trabajo de tesis se desarrollan algoritmos de computadora que permiten analizar y diseñar antenas de microtira de forma arbitraria.Para ello, se emplea el método de los elementos finitos, el de los elementos de contorno y el de reciprocidad dual, combinados con el modelo de cavidad resonante para antenas de microtira. Estos algoritmos se utilizan para analizar una antena de geometría novedosa que consiste en un parche cuadrado con una ranura excéntrica en su interior. Los resultados de las simulaciones se comparan con resultados experimentales, obtenidos de la medición de varios prototipos de antenas.

6. 22.105 Electromagnetic Interactions, Fall 1998 - Hutchinson, I. H. (Ian H.); Sen, P. N. (Pabitra N.)
Principles and applications of electromagnetism, starting from Maxwell's equations, with emphasis on phenomena important to nuclear engineering and radiation sciences. Solution methods for electrostatic and magnetostatic fields. Charged particle motion in those fields. Particle acceleration and focussing. Collisons with charged particles and atoms. Electromagnetic waves, wave emission by accelerated particles, Bremsstrahlung. Compton scattering. Photoionization. Elementary applications to ranging, shielding, imaging, and radiation effects.

7. Nudos electromagnéticos - Trueba Santander, José Luis
Se estudian algunas propiedades topologicas de los campos electromagnéticos, especialmente las relacionadas con el enlace de las líneas de campo. Este invariante topologico esta directamente asociado con una cantidad integral llamada helicidad, y definida para todo campo vectorial solenoidal. Gracias al estudio de estas propiedades, se desarrolla un modelo topológico del electromagnetismo clásico en el vacío. Este modelo es localmente equivalente a la teoría estándar, dada por las ecuaciones de maxwell, pero es diferente desde un punto de vista global, lo cual permite que existan cargas topologicas, esto es, cantidades conservadas por motivos topologicas. En particular, la helicidad electromagnética y...

8. Cálculo del campo magnético de alambres planos en coordenadas polares - Valvuena, Camilo; Bolaños, Western; Segura, Martha
Siguiendo el trabajo de Miranda [1] se calculó el campo magnético debido a corrientes que fluyen por alambres cuya forma puede ser descrita usando coordenadas polares r( q ) , tomando como punto de partida la Ley de Biot - Savart. Éste cálculo de campo magnético se llevó a cabo para alambres en forma de secciones cónicas, espirales y circuitos deformados armónicamente, tales como los cardiodides, los óvalos de Cassini, la nefroide de Freeth la hipopedia e Hipocloide , entre otras. Con éste trabajo se pretende mostrar la sencillez y utilidad del método aquí usado para abordar problemas que en...

9. Teaching Electromagnetism in Terms of Potentials Instead of Fields
Introduction The teaching of electromagnetism has long been in question, for a variety of reasons, including the pressure of material in undergraduate courses. One major factor is what is often seen to be the lack of relevance of the traditional material to the needs of the modern engineer. Electrical machines are given much less time than in the past, and the broadening range of interests in communications likewise reduces the emphasis on electromagnetic fields. Yet electrical engineering might well be defined as applied electromagnetism, and the need for some understanding of the subject can hardly be in doubt. The question is the extent and nature of that understanding...

10. Gravity And Electromagnetism In Noncommutative Geometry - Giovanni Landi,Nguyen Ai Viet
We present a unified description of gravity and electromagnetism in the framework of a Z 2 noncommutative differential calculus. It can be considered as a "discrete version" of Kaluza-Klein theory, where the fifth continuous dimension is replaced by two discrete points. We derive an action which coincides with the dimensionally reduced one of the ordinary Kaluza-Klein theory. PACS. 04.20.Jb, 04.40. +c, 11.15. -q, 14.80.Hv On leave from Dipartimento di Matematica, Universit`a di Trieste, P.le Europa 1, I-34100, Trieste, Italy. Also INFN, Sezione di Napoli, Napoli, Italy. Fellow of the Italian National Council of Research (CNR) under Grant No. 203.01.60. y On leave from Centre of Theoretical Physics, P.O.Box 429 Bo...

11. Gravity And Electromagnetism In Noncommutative Geometry - Giovanni Landi,Nguyen Ai Viet
We present a unified description of gravity and electromagnetism in the framework of a Z 2 noncommutative differential calculus. It can be considered as a "discrete version" of Kaluza-Klein theory, where the fifth continuous dimension is replaced by two discrete points. We derive an action which coincides with the dimensionally reduced one of the ordinary Kaluza-Klein theory. PACS. 04.20.Jb, 04.40. +c, 11.15. -q, 14.80.Hv On leave from Dipartimento di Matematica, Universit`a di Trieste, P.le Europa 1, I-34100, Trieste, Italy. Also INFN, Sezione di Napoli, Napoli, Italy. Fellow of the Italian National Council of Research (CNR) under Grant No. 203.01.60. y On leave from Centre of Theoretical Physics, P.O.Box 429 Bo...

12. Gravity And Electromagnetism In Noncommutative Geometry - Giovanni Landi,Nguyen Ai Viet
We present a unified description of gravity and electromagnetism in the framework of a Z 2 noncommutative differential calculus. It can be considered as a "discrete version" of Kaluza-Klein theory, where the fifth continuous dimension is replaced by two discrete points. We derive an action which coincides with the dimensionally reduced one of the ordinary Kaluza-Klein theory. PACS. 04.20.Jb, 04.40. +c, 11.15. -q, 14.80.Hv On leave from Dipartimento di Matematica, Universit`a di Trieste, P.le Europa 1, I-34100, Trieste, Italy. Also INFN, Sezione di Napoli, Napoli, Italy. Fellow of the Italian National Council of Research (CNR) under Grant No. 203.01.60. y On leave from Centre of Theoretical Physics, P.O.Box 429 Bo...

13. Electromagnetism and Gravitation - Kenneth Dalton
Modern experiment has shown that bulk matter exhibits quantum structure and that this structure is electromagnetic in character. Therefore, we treat the electromagnetic field as the source of gravitation. In this way, the theory of gravitation becomes consistent with the quantum theory of matter, which holds that electric charge (or `generalized charge') is the most fundamental attribute of matter. The following predictions of the theory may lie within reach of presentday methods in astronomy: (1) any massive body generates a time-dependent gravitational field; (2) there is a linear correlation between the gravitational red-shift of a stellar source and the energy of cosmic rays emitted by that source, given by Delta =...

14. Some formulations coupling finite element and integral equation methods for Helmholtz equation and electromagnetism
this paper a study of the coupling between integral equations and finite element methods is presented for two problems of propagation in frequency domain. It is shown that these problems can be viewed as multidomain problems and treated by the mean of the Schur complement technique. The complement coming from the integral equation part is expressed with the integral operators of the scattering theory. This allows to predict the behaviour of the Schur method, either primal or dual, as far as its convergence speed is concerned. Furthermore, the difference of behaviour between electromagnetism and acoustics from this point of view is explained.

15. Self-Duality in Nonlinear Electromagnetism - Mary K. Gaillard,Bruno Zumino
We discuss duality invariant interactions between electromagnetic fields and matter. The case of scalar fields is treated in some detail. Contribution to the memorial volume for D.V. Volkov. y This work was supported in part by the Director, Office of Energy Research, Office of High Energy and Nuclear Physics, Division of High Energy Physics of the U.S. Department of Energy under Contract DE-AC03-76SF00098 and in part by the National Science Foundation under grant PHY-95-14797. Disclaimer This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any agency thereof, nor The Regents...

16. Historical Note on Relativistic Theories of Electromagnetism - Valeri V. Dvoeglazov
nce their inception, see, e.g., refs. [2] and refs. [4-6]. In the preface to the Dover edition of his book [7] A. Barut writes (1979): "Electrodynamics and the classical theory of fields remain very much alive and continue to be the source of inspiration for much of the modern research work in new physical theories." And in the preface to the first edition he speaks of the shortcomings of modern quantum field theory. These are well known. Furthermore, in spite of great expectations in the sixties and seventies after the proposal of the Glashow-Salam-Weinberg model and quantum chromodynamics, attempts to formulate a unified field theory based...

17. Histories Electromagnetism - Burch, Aidan
Working within the HPO (History Projection Operator) Consistent Histories formalism, we follow the work of Savvidou on (scalar) field theory and that of Savvidou and Anastopolous on (first-class) constrained systems to write a histories theory (both classical and quantum) of Electromagnetism. We focus particularly on the foliation-dependence of the histories phase space/Hilbert space and the action thereon of the two Poincare groups that arise in histories field theory. We quantise in the spirit of the Dirac scheme for constrained systems.

18. El momento electromágnetico en la física moderna / Arturo Rodolfo Sánchez Pineda - Sánchez Pineda, Arturo Rodolfo; Spavieri, Gianfranco; Universidad de Los Andes. Departamento de Física, Tesis, 2008
Mecanografiado

19. Performance analysis of permanent magnet generators by adaptive mode - Sobhi-Najafabadi, Bijan; Gol, Ozdemir; Nafalski, Andrew

20. Disseny i implementació d'eines didàctiques per facilitar l'aprenentatge de principis de la física - Anglarill Gobern, Alex
Estudi de dues possibilitats de disseny i implementació d'eines didàctiques amb les biblioteques Physlets i Java3D, per a ser utilitzades en una pàgina web d'electromagnetisme. Com a resultat d'aquest estudi s'han desenvolupat dues aplicacions basades en el principi físic d'inducció magnètica i les seves aplicacions. L'estudi de les biblioteques Physlets i Java3D serveix per comprovar les seves virtuts i limitacions, i a la vegada sospesar la capacitat matemàtica de la primera amb les possibilitats gràfiques i disseny en 3D de la segona.

Página de resultados:
1  2  3  4  5  6  7  8  9  10  Siguiente