Tag: Fields

Conformal Vector Fields, Ricci Solitons and Related Topics


Free Download Conformal Vector Fields, Ricci Solitons and Related Topics
English | 2024 | ISBN: 9819992575 | 165 Pages | PDF EPUB (True) | 10 MB
This book provides an up-to-date introduction to the theory of manifolds, submanifolds, semi-Riemannian geometry and warped product geometry, and their applications in geometry and physics. It then explores the properties of conformal vector fields and conformal transformations, including their fixed points, essentiality and the Lichnerowicz conjecture. Later chapters focus on the study of conformal vector fields on special Riemannian and Lorentzian manifolds, with a special emphasis on general relativistic spacetimes and the evolution of conformal vector fields in terms of initial data.

(more…)

Electromagnetic Sources and Electromagnetic Fields


Free Download Electromagnetic Sources and Electromagnetic Fields
English | 2024 | ISBN: 9819994489 | 556 Pages | PDF EPUB (True) | 60 MB
This book presents a modified spherical harmonic expansion method in which the electromagnetic fields and their sources are expanded with the same set of spherical vector basis functions in a similar procedure. Explicit expressions for the electromagnetic fields, potentials, energies, and the related Green’s functions are derived for the spherical modes in both frequency domain and time domain. Based on the formulation, the relationships between the electromagnetic sources, the electromagnetic far fields, and the electromagnetic near fields are clearly revealed. In particular, a nonuniform transmission line model is developed for intuitively characterizing the total radiation process. The introduction of the cutoff radius and the cutoff mode degree provides a simple reference for determining the numbers of degrees of freedom of the fields associated with sources in a bounded region. Based on the theory, an efficient hybrid method for synthesizing antenna arrays with complex footprints is proposed and demonstrated with several numerical examples. Effective algorithms are also developed for reconstructing the radiating part of the current sources.

(more…)

Maple Leaves in Flanders Fields


Free Download Herbert Rae, "Maple Leaves in Flanders Fields"
English | 2013 | ISBN: 1017556016 | EPUB | pages: 282 | 0.5 mb
It was the celebrated Canadian physician and poet Lieutenant Colonel John McCrae that wrote the famous lines "In Flanders fields the poppies blow" as an opening to his famous poem ‘In Flanders Fields’. His countrymen had shed their blood copiously in fighting the Germans on the Western Front and earned an outstanding reputation as fighting troops. Despite perhaps lacking a bit of ‘spit and polish’, they would be exchanged by no Allied commander for other troops.

(more…)

Perspectives in Particles and Fields


Free Download Perspectives in Particles and Fields by Maurice Lévy, Jean-Louis Basdevant, David Speiser, Jacques Weyers, Maurice Jacob, Raymond Gastmans
English | 1985 | ISBN: 1475703716 | 598 Pages | PDF | 15.1 MB
The 1983 Cargese Summer Institute on Particles and Fields was organized by the Universite Pierre et Marie Curie, Paris (M. LEVY and J.-L. BASDEVANT), C.E.R.N. (M. JACOB), the Universite Catholique de Louvain (D. SPEISER and J. WEYERS), and the Katholieke Universiteit Leuven (R. GASTMANS). After 1975, 1977, 1979, and 1981, it was the fifth time they joined their efforts for organizing this Summer Insti tute. This school was characterized by simultaneous progress in the theory of elementary particles and by impressive experimental advances. On the theoretical front, one witnessed the new developments in lattice gauge theories, which explore the world of strongly interacting par ticles in a non-perturbative way, and progress in a better understan ding of the unity of all interactions based on supersymmetry. The experimentalists were ~roud to announce the discovery of the interme diate vector bosons; W- and ZO, at C.E.R.N., while physicists working with e+e- colliding beams continued to probe more deeply the validity of the theoretical models of strong, weak and electromagnetic inter actions.

(more…)

Fields, Networks, Computational Methods, and Systems in Modern Electrodynamics A Tribute to Leopold B. Felsen


Free Download Fields, Networks, Computational Methods, and Systems in Modern Electrodynamics: A Tribute to Leopold B. Felsen by Peter Russer, Mauro Mongiardo
English | 2004 | ISBN: 3642062962 | 280 Pages | PDF | 14.3 MB
On June 1St 2004 the Faculty of Electrical Engineering and Information Technology of the Technische Universitat Miinchen bestowed the degree of the doctor honoris causa to Leopold B. Felsen, for extraordinary achievements in the theory of electromag netic fields.

(more…)

Force Fields Between Intellectual History and Cultural Critique


Free Download Martin Jay, "Force Fields: Between Intellectual History and Cultural Critique"
English | 2014 | pages: 245 | ISBN: 0415906040, 1138177776 | PDF | 25,0 mb
Force Fields collects the recent essays of Martin Jay, an intellectual historian and cultural critic internationally known for his extensive work on the history of Western Marxism and the intellectual migration from Germany to America.

(more…)

Conversations on Electric and Magnetic Fields in the Cosmos (2024)


Free Download Eugene N. Parker, "Conversations on Electric and Magnetic Fields in the Cosmos"
English | 2007 | ISBN: 0691128413, 0691128405 | PDF | pages: 196 | 9.5 mb
Today’s standard textbooks treat the theoretical structure of electric and magnetic fields, but their emphasis is on electromagnetic radiation and static-electric and magnetic fields. In this book, Eugene Parker provides advanced graduate students and researchers with a much-needed complement to existing texts, one that discusses the dynamic electromagnetism of the cosmos-that is, the vast magnetic fields that are carried bodily in the swirling ionized gases of stars and galaxies and throughout intergalactic space.

(more…)