We have implemented a 2D electrostastic plasma particle in cell (PIC) simulation code on the Caltech/JPL Mark IIIfp Hypercube. The code simulates plasma effects by evolving in time the trajectories of thousands to millions of charged particles subject to their self-consistent fields. Each particle`s position and velocity is advanced in time using a leap frog method for integrating Newton`s equations of motion in electric and magnetic fields. The electric field due to these moving charged particles is calculated on a spatial grid at each time by solving Poisson`s equation in Fourier space. These two tasks represent the largest part of the computation. To obtain efficient operation on a distributed memory parallel computer, we are using the General Concurrent PIC (GCPIC) algorithm previously developed for a 1D parallel PIC code.

Transport of alkali metal atoms through porous cathodes of alkali metal thermal-to-electric converter (AMTEC) cells is responsible for significant, reducible losses in the electrical performance of these cells. Experimental evidence for activated transport of metal atoms at grain surfaces and boundaries within some AMTEC electrodes has been derived from temperature dependent studies as well as from analysis of the detailed frequency dependence of ac impedance results for other electrodes, including thin, mature molybdenum electrodes which exhibit transport dominated by free molecular flow of sodium gas at low frequencies or dc conditions. Activated surface transport will almost always exist in parallel with free molecular flow transport, and the process of alkali atom adsorption/desorption from the electrode surface will invariably be part of the transport process, and possibly a dominant part in some cases. Little can be learned about the detailed mass transport process from the ac impedance or current voltage curves of an electrode at one set of operating parameters, because the transport process includes a number of important physical parameters that are not all uniquely determined by one experiment. The temperature dependence of diffusion coefficient of the alkali metal through the electrode in several cases provides an activation energy and …

Transport of alkali metal atoms through porous cathodes of alkali metal thermal-to-electric converter (AMTEC) cells is responsible for significant, reducible losses in the electrical performance of these cells. Experimental evidence for activated transport of metal atoms at grain surfaces and boundaries within some AMTEC electrodes has been derived from temperature dependent studies as well as from analysis of the detailed frequency dependence of ac impedance results for other electrodes, including thin, mature molybdenum electrodes which exhibit transport dominated by free molecular flow of sodium gas at low frequencies or dc conditions. Activated surface transport will almost always exist in parallel with free molecular flow transport, and the process of alkali atom adsorption/desorption from the electrode surface will invariably be part of the transport process, and possibly a dominant part in some cases. Little can be learned about the detailed mass transport process from the ac impedance or current voltage curves of an electrode at one set of operating parameters, because the transport process includes a number of important physical parameters that are not all uniquely determined by one experiment. The temperature dependence of diffusion coefficient of the alkali metal through the electrode in several cases provides an activation energy and …

Long lifetimes are required for AMTEC (or sodium heat engine) components for aerospace and terrestrial applications, and the high heat input temperature as well as the alkali metal liquid and vapor environment places unusual demands on the materials used to construct AMTEC devices. In addition, it is important to maximize device efficiency and power density, while maintaining a long life capability. In addition to the electrode, which must provide both efficient electrode kinetics, transport of the alkali metal, and low electrical resistance, other high temperature components of the cell face equally demanding requirements. The beta{double prime} alumina solid electrolyte (BASE), the seal between the BASE ceramic and its metallic transition to the hot alkali metal (liquid or vapor) source, and metallic components of the device are exposed to hot liquid alkali metal. Modification of AMTEC components may also be useful in optimizing the device for particular operating conditions. In particular, a potassium AMTEC may be expected to operate more efficiently at lower temperatures.

Long lifetimes are required for AMTEC (or sodium heat engine) components for aerospace and terrestrial applications, and the high heat input temperature as well as the alkali metal liquid and vapor environment places unusual demands on the materials used to construct AMTEC devices. In addition, it is important to maximize device efficiency and power density, while maintaining a long life capability. In addition to the electrode, which must provide both efficient electrode kinetics, transport of the alkali metal, and low electrical resistance, other high temperature components of the cell face equally demanding requirements. The beta{double_prime} alumina solid electrolyte (BASE), the seal between the BASE ceramic and its metallic transition to the hot alkali metal (liquid or vapor) source, and metallic components of the device are exposed to hot liquid alkali metal. Modification of AMTEC components may also be useful in optimizing the device for particular operating conditions. In particular, a potassium AMTEC may be expected to operate more efficiently at lower temperatures.

A Cumulus Productions special program on AIDS awareness. In association with KQED.

Video footage from The Black Academy of Arts and Letters advertising the documentary drama play titled "The Azusa Street Revival" celebrating the history of William J. Seymour within the pentecostal religious movement in 1906. The docudrama appeared on The Gospel Light Showcase. The footage shows clips from the performance between interviews of the two main actors.

Text of a speech given by Barbara C. Jordan before the California Democratic Party in Los Angeles, California, endorsing Kathleen Brown for election as governor.

Photograph of Barbara Jordan sitting at a table. She is wearing a white dress, and there is a California Republic flag in the background.

Photograph of Barbara Jordan at the Hollywood Women Political Caucus. She is sitting next to a another woman, wearing a white coat, and visible from the chest up.

Photograph of Barbara Jordan with three unidentified people at the Hollywood Women Political Caucus. She is wearing a white dress, and sitting at a table, visible from the chest up.

Speech given by Barbara C. Jordan before the Hollywood Women's Political Committee, introducing the recipient of the Barbara Jordan Award, Marian Wright Edelman, and speaking of the goals and hopes of the Hollywood Women's Political Committee.

Photograph of Barbara Jordan with an unidentified man. She is wearing a blue dress and visible from the chest up. He is wearing a black suit and visible from the waist up.

Photograph of Barbara Jordan with a man and a woman at the Hollywood Women Political Caucus. She is wearing a blue dress, the man is wearing a black suit, and the woman is wearing a black dress.

A) Dress of black velour knit with green "Riddler" question marks printed in various sizes. The t-shirt style dress is knee length, with rounded neckline and short sleeves. Unlined. B) Dress of velour knit with green "Riddler" question marks printed in various sizes, the question marks covered in applied clear novelty "sequins" created by Swarovski. The knee-length dress has a scoop neckline, and spaghetti straps formed of gray metal (pewter?) question marks set with emerald green rhinestones. Unlined. C) Jacket of black polyester satin printed with green "Riddler" question marks of various sizes. The hip-length jacket is single breasted with three oval gray metal (pewter?) "Batman" symbol buttons, and notched collar. Two front patch pockets. Long sleeves. Lined in green polyester satin with large black question mark on center back. Designer's label at center back neckline: "Todd Oldham / Forever (inside Batman logo)" Underside of designer's label: "Batman and All / Related Elements Are / Property of DC Comics / TM 1995" Fiber content/cleaning instruction label beneath designer's label

Newspaper clipping from the LA Times with the article "Above and Beyond," which discusses the Women Airforce Service Pilots and their struggle to gain recognition for their service, as well as interviews with veterans. Excerpts from other articles and a Doonesbury comic are also included.

A clipping from The Advocate about the working relationship between William Waybourn and David Mixner to reach out to LGBTQIA+ consumers.

Newspaper clipping from the Dallas Morning News, originally published by the Religious News Service, dated November 2, 1991. The article discusses the Rev. Jerry Falwell's claim that a group of homosexuals intended to kill him at the Hollywood Roosevelt Hotel in Los Angeles, in October 1991. The article quotes Falwell's description of the event in a fund-raising letter mailed to Falwell's supporters.

A Los Angeles Times clipping about Los Angeles-area AIDS programs building a set of apartments for AIDS patients as a result of funds allocation.

Newspaper clipping of an article about Alma Jeschien, a WASP member, working as an air-show pilot. The articles includes personal stories from her experiences a pilot, and a photograph of Jeschien standing next to a small propeller on a tarmac. On the back of the clipping are a few articles, letters to the editor, and a multi-panel political cartoon.

Newspaper clipping of an article about Alma Jeschien, a WASP member, working as an air-show pilot. The articles includes personal stories from her experiences a pilot, and a photograph of Jeschien standing next to a small propeller on a tarmac. On the back of the clipping are a few articles, letters to the editor, and a multi-panel political cartoon.

Newspaper clipping of a section of the May 1990 issue of The Miami Herald. Articles about the WASPs service in World War 2, why Maria Muniz joined the Marine Corps, two nurses who served in the Vietnam War, and more are included.

Dress of kelly green wool crepe. U-shaped yoke is piped in matching green satin. Long sleeves gather at 2-1/2" cuffs with bound satin hem and closure of two satin covered buttons and barred buttonholes. Standing collar is bound in green satin. Dropped waist is pleated at sides with splits up sides; hem and side splits bound in matching green satin. Center back zipper closure. Lined in green silk. Designer's label at left side seam: Galanos Retailer's label at right side seam: Neiman-Marcus Cleaning instructions tag with designer label.

Video footage provided by The Black Academy of Arts and Letters shown during the Delta Sigma Theta Awards Gala. The footage shows an animated slideshow with photo slides of famous members of the sorority along with their names and city. A narrator speaks over the slideshow giving a brief description of the women's accomplishments. The women commonly serve their community in positions of education, politics, civil rights, and public service.