Media streams--representing video for retrieval and repurposing

Thesis (Ph. D.)--Massachusetts Institute of Technology, Program in Media Arts & Sciences, 1995.Includes bibliographical references (p. 325-344).by Marc Eliot Davis.Ph.D

Basic Atomic Physics

Contains reports on four research projects.Joint Services Electronics Program Contract DAAL03-92-C-0001National Science Foundation Grant PHY 89-19381U.S. Navy - Office of Naval Research Grant N00014-90-J-1322National Science Foundation Grant PHY 89-21769U.S. Army - Office of Scientific Research Contract DAAL03-89-K-0082U.S. Navy - Office of Naval Research Grant N00014-89-J-1207U.S. Navy - Office of Naval Research Grant N00014-90-J-164

The Science Performance of JWST as Characterized in Commissioning

This paper characterizes the actual science performance of the James Webb Space Telescope (JWST), as determined from the six month commissioning period. We summarize the performance of the spacecraft, telescope, science instruments, and ground system, with an emphasis on differences from pre-launch expectations. Commissioning has made clear that JWST is fully capable of achieving the discoveries for which it was built. Moreover, almost across the board, the science performance of JWST is better than expected; in most cases, JWST will go deeper faster than expected. The telescope and instrument suite have demonstrated the sensitivity, stability, image quality, and spectral range that are necessary to transform our understanding of the cosmos through observations spanning from near-earth asteroids to the most distant galaxies.Comment: 5th version as accepted to PASP; 31 pages, 18 figures; https://iopscience.iop.org/article/10.1088/1538-3873/acb29

The James Webb Space Telescope Mission

Twenty-six years ago a small committee report, building on earlier studies, expounded a compelling and poetic vision for the future of astronomy, calling for an infrared-optimized space telescope with an aperture of at least $4m$. With the support of their governments in the US, Europe, and Canada, 20,000 people realized that vision as the $6.5m$ James Webb Space Telescope. A generation of astronomers will celebrate their accomplishments for the life of the mission, potentially as long as 20 years, and beyond. This report and the scientific discoveries that follow are extended thank-you notes to the 20,000 team members. The telescope is working perfectly, with much better image quality than expected. In this and accompanying papers, we give a brief history, describe the observatory, outline its objectives and current observing program, and discuss the inventions and people who made it possible. We cite detailed reports on the design and the measured performance on orbit.Comment: Accepted by PASP for the special issue on The James Webb Space Telescope Overview, 29 pages, 4 figure

Media Streams: Representing Video for Retrieval and Repurposing

Current computing systems are just beginning to enable the computational manipulation of digital video. Because of the relative opacity of video, it must be represented in order to be manipulable according to its content. Knowledge representation techniques have been implicitly designed for representing the physical world and its textual representations. Video poses unique problems and opportunities for knowledge representation which challenge man

Semantic Video Logging with Intelligent Icons Position Paper For AAAI-91 Intelligent Multimedia Interfaces Workshop

Abstract- The Director's Workshop is an iconic interface for the logging of multimedia information in domain-independent, multimedia archives. The interface makes use of a temporally indexed, semantically structured representation of the content for multimedia information. Descriptive icons are quickly selected by cascading through icon hierarchies, and then organized into palettes for use in the logging process. When logging, icons are dragged from the icon palettes and dropped onto descriptive layers of the Media Time Line which displays the various content streams of the multimedia information in a vertical hierarchical organization along a horizontal temporal axis. The representation and interface are designed to make the logging process easier and more productive. The goal is to help users adequately describe multimedia information for later retrieval and resequencing by automatic presentation systems

Wage Theory, New Deal Labor Policy, and the Great Depression: Were Government and Unions to Blame?

A growing number of economists blame the length and severity of the Great Depression on factors that rigidified wage rates, raised production costs, and interfered with the market allocation of labor. The target of their critique is President Franklin Roosevelt’s New Deal labor program, which they portray as creating a series of large negative supply shocks through encouragement of unions, minimum wages, unemployment insurance, and other anticompetitive industrial relations practices. The author uses a combination of institutional and Keynesian theory to present the other side of the story. Drawing principally from the works of J. R. Commons and J. M. Keynes, he develops both a spending and productivity rationale for stable wages during the Great Depression and demonstrates that the New Deal’s interventionist labor program was on balance necessary and beneficial. He also highlights the neglected macroeconomic dimension of industrial relations theory and policy