Clouds present substantial concentrations of liquid-phase water, which can potentially serve as a medium for dissolution and reaction of atmospheric gases. The important precursors of acid deposition, SO{sub 2} and nitrogen oxides NO and NO{sub 2} are only sparingly soluble in clouds without further oxidation to sulfuric and nitric acids. In the case of SO{sub 2} aqueous-phase reaction with hydrogen peroxide, and to lesser extent ozone, are identified as important processes leading to this oxidation, and methods have been described by which to evaluate the rates of these reactions. The limited solubility of the nitrogen oxides precludes significant aqueous-phase reaction of these species, but gas-phase reactions in clouds can be important especially at night.

Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.

Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.

Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.

This ''annual report'' details the FY 2000 achievements of the U.S. Department of Energy PV Program in the categories of Research and Development, Technology Development, and Systems Engineering and Applications. Highlights include development of a record-breaking concentrator solar cell that is 32.4% efficient; fabrication of a record CIGS (copper indium gallium diselenide) cell at 18.8% efficiency; sharing an R and D 100 award with Siemens Solar Industries and the California Energy Commission for development and deployment of commercial CIS thin-film modules; and support for the efforts of the PV Industry Roadmap Workshop.

A description of Tiger Teams, sponsored by DOE and NREL to help implement the use of alternative fuels by constituents of DOE's Clean Cities coalitions.

An account of the successful use of alternative fuels in a fleet of SuperShuttle passenger vans, which offer shared-rides between Boulder and Denver International Airport.

Single-crystal neutron diffraction measures the elastic Bragg reflection intensities from crystals of a material, the structure of which is the subject of investigation. A single crystal is placed in a beam of neutrons produced at a nuclear reactor or at a proton accelerator-based spallation source. Single-crystal diffraction measurements are commonly made at thermal neutron beam energies, which correspond to neutron wavelengths in the neighborhood of 1 Angstrom. For high-resolution studies requiring shorter wavelengths (ca. 0.3-0.8 Angstroms), a pulsed spallation source or a high-temperature moderator (a ''hot source'') at a reactor may be used. When complex structures with large unit-cell repeats are under investigation, as is the case in structural biology, a cryogenic-temperature moderator (a ''cold source'') may be employed to obtain longer neutron wavelengths (ca. 4-10 Angstroms). A single-crystal neutron diffraction analysis will determine the crystal structure of the material, typically including its unit cell and space group, the positions of the atomic nuclei and their mean-square displacements, and relevant site occupancies. Because the neutron possesses a magnetic moment, the magnetic structure of the material can be determined as well, from the magnetic contribution to the Bragg intensities. This latter aspect falls beyond the scope of the present unit; for …

Single-crystal neutron diffraction measures the elastic Bragg reflection intensities from crystals of a material, the structure of which is the subject of investigation. A single crystal is placed in a beam of neutrons produced at a nuclear reactor or at a proton accelerator-based spallation source. Single-crystal diffraction measurements are commonly made at thermal neutron beam energies, which correspond to neutron wavelengths in the neighborhood of 1 Angstrom. For high-resolution studies requiring shorter wavelengths (ca. 0.3-0.8 Angstroms), a pulsed spallation source or a high-temperature moderator (a ''hot source'') at a reactor may be used. When complex structures with large unit-cell repeats are under investigation, as is the case in structural biology, a cryogenic-temperature moderator (a ''cold source'') may be employed to obtain longer neutron wavelengths (ca. 4-10 Angstroms). A single-crystal neutron diffraction analysis will determine the crystal structure of the material, typically including its unit cell and space group, the positions of the atomic nuclei and their mean-square displacements, and relevant site occupancies. Because the neutron possesses a magnetic moment, the magnetic structure of the material can be determined as well, from the magnetic contribution to the Bragg intensities. This latter aspect falls beyond the scope of the present unit; for …

This fact sheet provides an introduction to renewable energy technologies: hydropower, bioenergy, geothermal energy, solar energy, wind energy, hydrogen, and ocean energy.

This booklet is designed to guide you through the process of buying a grid-tied solar electric system. A word of caution: This is not a technical guide for designing or installing your system.

Transcript of an interview with Lloyd Gossell, a Marine Corps veteran (A Company, 1st Battalion, 28th Regiment, 5th Marine Division), concerning his experiences during the assault on Iwo Jima, February-March, 1945. Gossell discusses his enlistment and boot camp, San Diego, California, 1942; assignment to the 3rd Marine Parachute Battalion, 1942; jungle training on New Caledonia, 1942-43; transfer to Guadalcanal, 1943; combat on Bougainville, 1943-44; return to the States to help form the 5th Marine Division; final training, Camp Tarawa, Hawaii, 1944-45; briefings and meetings en route to Iwo Jima; the pre-invasion bombardment of Iwo Jima; the initial assault on February 17, 1945; conditions on Green Beach; the assault across terraces to the base of Mount Suribachi; isolating Mount Suribachi from the rest of the island; transfer to the north end of Iwo Jima and combat on Hill 362-A; combat in "Death Valley"; occupation of Japan. Appendix includes a map of the landings for the invasion of Iwo Jima.

Just imagine living in Florida and your fantasies might turn to swaying palms, fresh orange juice and lots of air-conditioning. For most people, a summer spent in Florida's heat and humidity would be unbearable without it. So air-conditioning is a necessity. But it's also a big energy drain, accounting for about 35% of all electricity used in a typical Florida house. As the largest single source of energy consumption in Florida, a home's air-conditioning load represents the biggest energy challenge. The Florida Solar Energy Center (FSEC) designed a project to answer this challenge. Two homes were built with the same floor plan on near-by lots. The difference was that one (the ''control home'') conformed to local residential building practices, and the other (the ''Zero Energy home'') was designed with energy efficiency in mind and solar technology systems on the roof. The homes were then monitored carefully for energy use. The project's designers were looking to answer two important questions: Could a home in a climate such as central Florida's be engineered and built so efficiently that a relatively small PV system would serve the majority of its cooling needs--and even some of its daytime electrical needs? And, would that home …

The U.S. Department of Energy is pursuing an aggressive goal to cut the cost of solar water-heating systems in half. Replacing metal and glass components with less expensive plastic ones is a key strategy for that goal. This is a short (2-page) fact sheet about new technologies for solar water heaters.

Catalog of courses offered by the Lamar Institute of Technology for the year 2002-2003, as well as general information about the university, programs, and policies, along with an admissions form.

Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.

Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.

Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.

The National Renewable Energy Laboratory's (NREL) eighth annual Information Resources Catalog can help keep you up-to-date on the research, development, opportunities, and available technologies in energy efficiency and renewable energy. The catalog includes five main sections with entries grouped according to subject area.

Neutrons are an invaluable probe in a wide range of scientific, medical and commercial endeavors. Many of these applications require the recording of an image of the neutron signal, either in one-dimension or in two-dimensions. We summarize the reactions of neutrons with the most important elements that are used for their detection. A description is then given of the major techniques used in neutron imaging, with emphasis on the detection media and position readout principle. Important characteristics such as position resolution, linearity, counting rate capability and sensitivity to gamma-background are discussed. Finally, the application of a subset of these instruments in radiology and tomography is described.

For Victor Hugo, the nineteenth century could be remembered by only its first two years, which established peace in Europe and France's supremacy on the continent. For General Lam Quang Thi, the twentieth century had only twenty-five years: from 1950 to 1975, during which the Republic of Vietnam and its Army grew up and collapsed with the fall of Saigon. This is the story of those twenty-five years. General Thi fought in the Indochina War as a battery commander on the side of the French. When Viet Minh aggression began after the Geneva Accords, he served in the nascent Vietnamese National Army, and his career covers this army's entire lifespan. He was deputy commander of the 7th Infantry Division, and in 1965 he assumed command of the 9th Infantry Division. In 1966, at the age of thirty-three, he became one of the youngest generals in the Vietnamese Army. He participated in the Tet Offensive before being removed from the front lines for political reasons. When North Vietnam launched the 1972 Great Offensive, he was brought back to the field and eventually promoted to commander of an Army Corps Task Force along the Demilitarized Zone. With the fall of Saigon, he …

Interview with aircraft worker Ivan Bounds. The interview includes Bounds' personal experiences as a longtime resident of Denton County, Texas from 1926-2002.

Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.

Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.