WorldCat Identities

Alcock, Charles

Overview
Works: 20 works in 23 publications in 1 language and 28 library holdings
Genres: Conference papers and proceedings  Academic theses  Observations 
Roles: Author
Classifications: QB791.3,
Publication Timeline
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Most widely held works by Charles Alcock
I. Small angle scattering of radiation. : II. Molecular emission lines around evolved stars by Charles Alcock( )

3 editions published between 1978 and 1980 in English and held by 3 WorldCat member libraries worldwide

Metallurgičeskaja termochimija by O Kubaschewski( Book )

1 edition published in 1982 in Undetermined and held by 2 WorldCat member libraries worldwide

The dark side of modern astronomy by Charles Alcock( Visual )

1 edition published in 2001 in English and held by 2 WorldCat member libraries worldwide

Prof. Charles Alcock, Dept. of Physics & Astronomy, University of Pennsylvania. Astronomy increasingly is dealing with invisible, or nearly invisible objects. These objects range from the constituents of the outer parts of our own solar system, through extra-solar planets, up to the cosmic dark matter that pervades the universe. The techniques employed to examine these objects increasingly involve massive surveys which collect enormous datasets. Working with these datasets changes the nature of scientific discovery, when all of the analysis is performed automatically. One of the first astronomical surveys to collect terabytes of data, the MACHO Project, tested the hypothesis that objects of planetary or stellar mass make up the dark matter in the Milky Way. This talk describes this survey, and two surveys for comets in the solar system which are technically very similar. Prof. Alcock ends with some comments about the evolution of astronomy in the age of massive datasets
The MACHO Project : a search for baryonic dark matter in the Milky Way by Charles Alcock( Visual )

1 edition published in 1991 in English and held by 2 WorldCat member libraries worldwide

One of the many hypothesis of the constitution of dark matter is that it is made up of "Machos" (Massive Compact Halo Objects), which are objects resembling the planet Jupiter. The test of this hypothesis, conducted by Lawrence Livermore Laboratory, the Center for Particle Astrophysics at UCB and the Australian National University, is described
Fishing in the dark : searching for extremely faint objects in the outer solar system by Charles Alcock( Visual )

1 edition published in 2003 in English and held by 2 WorldCat member libraries worldwide

Lecturer presents an overview of the Taiwanese-American Occultation Survey (TAOS), the system components, software architecture, and some of the challenges encountered
The future of gravitational microlensing surveys by Charles Alcock( Visual )

1 edition published in 1999 in English and held by 2 WorldCat member libraries worldwide

Lecture focuses on recently discovered baryonic material that makes up between 20% and 100% of the dark matter in the dark halo of the Milky Way. Dr. Alcock discusses strategies for resolving the differences among competing explanations for the results of investigations of this material
The search for dark matter in our galaxy by Charles Alcock( Visual )

2 editions published in 1991 in English and held by 2 WorldCat member libraries worldwide

Overwhelming evidence points to more matter than can be seen in the Milky Way. Dr. Alcock discusses some of the theories of what this "dark matter" might consist of and describes some experimental projects
Unshackled authority develops Dulles by Charles Alcock( )

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

JFK gets into shape for the millenium by Charles Alcock( )

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

Strange stars by Charles Alcock( Book )

1 edition published in 1986 in English and held by 1 WorldCat member library worldwide

Italian airports by Charles Alcock( )

1 edition published in 1990 in English and held by 1 WorldCat member library worldwide

Oakland and San Jose scramble for SFO's excess by Charles Alcock( )

1 edition published in 1990 in English and held by 1 WorldCat member library worldwide

I. Small Angle Scattering of Radiation. II. Molecular Emission Lines Around Evolved Stars by Charles Alcock( Book )

1 edition published in 1978 in English and held by 1 WorldCat member library worldwide

<p>This dissertation is in two Parts. Part I consists of a paper on the effect of small angle scattering on a pulse of radiation, and an analysis of the particular case of X-rays scattering off interstellar grains. Part II concerns the excitation of SiO emission lines around evolved stars. There are two papers, the first on 'thermal' emission lines and the second on maser emission lines. Each paper has its own abstract.</p> <p>Part I: We have analyzed in detail the general problem of the propagation of a pulse of radiation through a uniform medium containing small angle scatterers. Simple expressions for the first moment of the arrival time delay and for the second and fourth moments of the arrival angle of the pulse photons are given, valid for any optical depth. Using the first two of these we find a simple method of distance determination. Joint and individual distribution functions for arrival time and angle are derived in the small and large optical depth limits. An exponential tail in the arrival time distribution is characteristic in both limits. The analysis has been applied to a burst of x-rays from a source near the galactic center propagating through the dust of the interstellar medium. The grains responsible for interstellar reddening can have very little observable effect. However, the observed lengths, energy dependence, and variability of the burst tails can be readily accounted for by a population of large ~3μ grains. We derive useful constraints on the grain distribution from observations of the burst tails.</p> <p>Part II (i): We have investigated the excitation of the microwave lines in the ground vibrational state of the SiO molecule in the expanding envelope of cool Mira-type stars. The rotational levels are excited when an SiO molecule absorbs an 8μ photon and is left in the lowest excited vibrational state; the spontaneous decay of the excited vibrational state preferentially leaves the molecule with a higher rotational quantum number than it
The evaporation of strange matter in the early universe by Charles Alcock( Book )

1 edition published in 1985 in English and held by 1 WorldCat member library worldwide

A model for the 1979 March 5 gamma-ray transient by Charles Alcock( Book )

1 edition published in 1986 in English and held by 1 WorldCat member library worldwide

I. Small Angle Scattering of Radiation. II. Molecular Emission Lines Around Evolved Stars by Charles Alcock( )

1 edition published in 1978 in English and held by 1 WorldCat member library worldwide

<p>This dissertation is in two Parts. Part I consists of a paper on the effect of small angle scattering on a pulse of radiation, and an analysis of the particular case of X-rays scattering off interstellar grains. Part II concerns the excitation of SiO emission lines around evolved stars. There are two papers, the first on 'thermal' emission lines and the second on maser emission lines. Each paper has its own abstract.</p> <p>Part I: We have analyzed in detail the general problem of the propagation of a pulse of radiation through a uniform medium containing small angle scatterers. Simple expressions for the first moment of the arrival time delay and for the second and fourth moments of the arrival angle of the pulse photons are given, valid for any optical depth. Using the first two of these we find a simple method of distance determination. Joint and individual distribution functions for arrival time and angle are derived in the small and large optical depth limits. An exponential tail in the arrival time distribution is characteristic in both limits. The analysis has been applied to a burst of x-rays from a source near the galactic center propagating through the dust of the interstellar medium. The grains responsible for interstellar reddening can have very little observable effect. However, the observed lengths, energy dependence, and variability of the burst tails can be readily accounted for by a population of large ~3μ grains. We derive useful constraints on the grain distribution from observations of the burst tails.</p> <p>Part II (i): We have investigated the excitation of the microwave lines in the ground vibrational state of the SiO molecule in the expanding envelope of cool Mira-type stars. The rotational levels are excited when an SiO molecule absorbs an 8μ photon and is left in the lowest excited vibrational state; the spontaneous decay of the excited vibrational state preferentially leaves the molecule with a higher rotational quantum number than it
ICAA set to update disabled guidelines by Charles Alcock( )

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

O'Hare resolves to maintain its status by Charles Alcock( )

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

Eurohubs battle for cargo traffic by Charles Alcock( )

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

Where there's a will there's a wayport by Charles Alcock( )

1 edition published in 1989 in English and held by 1 WorldCat member library worldwide

 
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Languages
English (22)