WorldCat Identities

Macdonald, Douglas A. (Douglas Alan)

Overview
Works: 7 works in 19 publications in 2 languages and 539 library holdings
Genres: Academic theses 
Roles: Editor, Author
Classifications: QB843.B55, 523
Publication Timeline
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Most widely held works by Douglas A Macdonald
Black holes : the membrane paradigm by Kip S Thorne( Book )

12 editions published between 1986 and 1988 in English and Russian and held by 531 WorldCat member libraries worldwide

A pedagogical introduction to the physics of black holes. The membrane paradigm represents the four-dimensional spacetime of the black hole's "event horizon" as a two-dimensional membrane in three-dimensional space, allowing the reader to understand and compute the behavior of black holes in complex astrophysical environments
Black-hole electrodynamics by Douglas A Macdonald( )

2 editions published in 1984 in English and held by 3 WorldCat member libraries worldwide

Chernye dyry : membrannyĭ podkhod( Book )

1 edition published in 1988 in Russian and held by 2 WorldCat member libraries worldwide

Černye dyry : membrannyj podhod( Book )

1 edition published in 1988 in Russian and held by 1 WorldCat member library worldwide

Black-Hole Electrodynamics by Douglas A Macdonald( Book )

1 edition published in 1984 in English and held by 1 WorldCat member library worldwide

<p>This dissertation considers several aspects of the structure and dynamics of electromagnetic fields around black holes. The four-dimensional, covariant laws of electrodynamics are reformulated in a 3 + 1 (space+time) language in which the key quantities are three-dimensional vectors lying in hypersurfaces of a constant global time <i>t</i>. This formulation is applied to the Blandford-Znajek model of power generation in quasars, which consists of a supermassive black hole surrounded by an accretion disk that holds a magnetic field on the hole, with the rotational energy and angular momentum of the hole and disk being extracted by electromagnetic torques. The 3 + 1 formalism allows the theory of stationary, axisymmetric black holes and their magnetospheres to be couched in an "absolute-space/universal-time" language very similar to the flat­ spacetime theory of pulsar electrodynamics; and this similarity allows fiat-space pulsar concepts to be extended to curved-space black holes. The Blandford­-Znajek quasar model is reformulated in terms of a DC circuit-theory analysis, and action principles describing the overall structure of the magnetosphere and the field distribution on the horizon are developed. A general prescription for constructing global models of force-free magnetospheres is developed and this prescription is used to generate numerical models of black-hole magneto­spheres for a variety of field configurations and black-hole angular velocities. The electromagnetic boundary conditions at the horizon of a black hole are described in terms of a recently developed "membrane viewpoint". The necess­ity and efficacy of using a "stretched horizon" in the membrane viewpoint is discussed, and is illustrated by two simple dynamical problems involving electromagnetic fields near black-hole horizons.</p>
Black-Hole Electrodynamics by Douglas A Macdonald( )

1 edition published in 1984 in English and held by 1 WorldCat member library worldwide

<p>This dissertation considers several aspects of the structure and dynamics of electromagnetic fields around black holes. The four-dimensional, covariant laws of electrodynamics are reformulated in a 3 + 1 (space+time) language in which the key quantities are three-dimensional vectors lying in hypersurfaces of a constant global time <i>t</i>. This formulation is applied to the Blandford-Znajek model of power generation in quasars, which consists of a supermassive black hole surrounded by an accretion disk that holds a magnetic field on the hole, with the rotational energy and angular momentum of the hole and disk being extracted by electromagnetic torques. The 3 + 1 formalism allows the theory of stationary, axisymmetric black holes and their magnetospheres to be couched in an "absolute-space/universal-time" language very similar to the flat­ spacetime theory of pulsar electrodynamics; and this similarity allows fiat-space pulsar concepts to be extended to curved-space black holes. The Blandford­-Znajek quasar model is reformulated in terms of a DC circuit-theory analysis, and action principles describing the overall structure of the magnetosphere and the field distribution on the horizon are developed. A general prescription for constructing global models of force-free magnetospheres is developed and this prescription is used to generate numerical models of black-hole magneto­spheres for a variety of field configurations and black-hole angular velocities. The electromagnetic boundary conditions at the horizon of a black hole are described in terms of a recently developed "membrane viewpoint". The necess­ity and efficacy of using a "stretched horizon" in the membrane viewpoint is discussed, and is illustrated by two simple dynamical problems involving electromagnetic fields near black-hole horizons.</p>
Morality and the criminal law : an examination of some recent attempts to define theoretical limits to the proper scope of the criminal law by Douglas A Macdonald( )

1 edition published in 1972 in English and held by 0 WorldCat member libraries worldwide

 
Audience Level
0
Audience Level
1
  Kids General Special  
Audience level: 0.49 (from 0.48 for Morality a ... to 1.00 for Morality a ...)

Black holes : the membrane paradigm
Covers
Alternative Names
Mac Donald, Douglas A.

Macdonald, Douglas A.

Makdonald, D.

Makdonald, Douglas.

Makdonald, Duglas A.

Mc Donald, Douglas A.

McDonald, Douglas A.

Макдоналд, Дуглас А.

Languages