Digital television (DTV) is a new television service representing the most significant development in television technology since the advent of color television in the 1950s. DTV can provide sharper pictures, a wider screen, CD-quality sound, better color rendition, and other new services currently being developed. A successful deployment of DTV requires: the development by content providers of compelling digital programming; the delivery of digital signals to consumers by broadcast television stations, as well as cable and satellite television systems; and the widespread purchase and adoption by consumers of digital television equipment. A key issue in the Congressional debate over the digital transition has been addressing the millions of American over-the-air households whose existing analog televisions will require converter boxes in order to receive digital signals when the analog signal is turned off.
The radiofrequency spectrum is the medium that enables wireless communications of all kinds. This report provides an overview of the development of the legal and regulatory framework for spectrum management (SM) at the Fed. level and assesses key issues associated with SM at Fed. agencies. It focuses on: the evolution of the current legal and regulatory framework for domestic SM; the current methods for allocating spectrum domestically and planning for its use; the adequacy of the current U.S. preparatory process for the World Radiocommun. Conferences, at which decisions are made on how to allocate spectrum internationally; and the activities used to increase accountability and encourage the efficient use of spectrum by Fed. agencies. Charts and tables.
Acid rain -- which is largely the result of burning fossil fuels to generate electricity -- can harm human health and damage forests, lakes, and streams. EPA was directed to reduce the emissions of the two major causes of acid rain -- sulfur dioxide (SD) and nitrogen oxides (NO) -- from electric utility power plants that burn coal and other fossil fuels. This report analyzes the trends from 1990 through 1998 in: (1) SD and NO emitted into the air; (2) deposition in the eastern U.S. and in 3 environmentally sensitive areas (the Adirondack Mountains, mid-Appalachian area, and southern Blue Ridge area); and (3) sulfates and nitrates in lakes in the Adirondack Mountains and the prospects for the lakes¿ recovery from acid rain. Illustrations.
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