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Advances in high temperature components for AMTEC (alkali metal thermal-to-electric converter)

Description: 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… more
Date: January 1, 1991
Creator: Williams, R.M.; Jeffries-Nakamura, B.; Underwood, M.L.; Ryan, M.A.; O'Connor, D. & Kikkert, S.
Partner: UNT Libraries Government Documents Department
open access

[Denton Record-Chronicle articles, June 10, 1990]

Description: A clipping of an article by Susan Shelton for the Denton Record-Chronicle about the new NTIEVA program's reworking of art education in Metroplex schools. Another piece by Shelton that is included covers Dr. Warren Carver's support of the program.
Date: June 10, 1990
Creator: Shelton, Susan
Partner: UNT Libraries Special Collections
open access

Reversible thermodynamic cycle for AMTEC power conversion

Description: The thermodynamic cycle appropriate to an AMTEC (alkali metal thermal-to-electric converter) cell is discussed for both liquid- and vapor-fed modes of operation, under the assumption that all processes can be performed reversibly. In the liquid-fed mode, the reversible efficiency is greater than 89.6% of Carnot efficiency for heat input and rejection temperatures (900--1300 K and 400--800 K, respectively) typical of practical devices. Vapor-fed cells can approach the efficiency of liquid-fed ce… more
Date: July 1, 1992
Creator: Vining, C. B.; Williams, R. M.; Underwood, M. L.; Ryan, M. A. & Suitor, J. W.
Partner: UNT Libraries Government Documents Department
open access

Design considerations for a fiber optic communications network for power systems

Description: The design of a fiber optic communication network for monitoring and control in power systems is discussed. It is shown that by appropriate choice of protocols, a fault-tolerant system can be built that operates in any arbitrary configuration. Since the network is based on fiber optics, it can be made fast enough for substation monitoring and control. In this application, a relatively small number of cables is required to implement a high reliability system. The network can also be used for dis… more
Date: August 1, 1993
Creator: Kirkham, H.; Johnston, A. R. & Allen, G. D.
Partner: UNT Libraries Government Documents Department
open access

Efficiency of an AMTEC recirculating test cell, experiments and projections

Description: The alkali metal thermal to electric converter (AMTEC) is an electrochemical device for the direct conversion of heat to electrical energy with efficiencies potentially near Carnot. The future usefulness of AMTEC for space power conversion depends on the efficiency of the devices. Systems studies have projected from 15% to 35% thermal to electric conversion efficiencies, and one experiment has demonstrated 19% efficiency for a short period of time. Recent experiments in a recirculating test cel… more
Date: May 1, 1992
Creator: Underwood, M. L.; O`Connor, D.; Williams, R. M.; Jeffries-Nakamura, B. & Ryan, M. A.
Partner: UNT Libraries Government Documents Department
open access

Activated transport in AMTEC electrodes

Description: 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, inclu… more
Date: July 1, 1992
Creator: Williams, R. M.; Jeffries-Nakamura, B.; Ryan, M. A.; Underwood, M. L.; O`Connor, D. & Kikkert, S.
Partner: UNT Libraries Government Documents Department
open access

[Article: Decathlete, family man, games founder]

Description: A magazine article about the last days of Dr. Tom Waddell's life from Dick Schaap's view. Dr. Tom Waddell was the founder of the Gay Games, a famous athlete, and was diagnosed with AIDS.
Date: June 1994
Partner: UNT Libraries Special Collections
open access

Activated transport in AMTEC electrodes

Description: 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, inclu… more
Date: January 1, 1992
Creator: Williams, R.M.; Jeffries-Nakamura, B.; Ryan, M.A.; Underwood, M.L.; O'Connor, D. & Kikkert, S.
Partner: UNT Libraries Government Documents Department
open access

A 2D electrostatic PIC code for the Mark III Hypercube

Description: 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 partic… more
Date: December 31, 1990
Creator: Ferraro, R. D.; Liewer, P. C. & Decyk, V. K.
Partner: UNT Libraries Government Documents Department
open access

Dynamic load balancing in a concurrent plasma PIC code on the JPL/Caltech Mark III hypercube

Description: Dynamic load balancing has been implemented in a concurrent one-dimensional electromagnetic plasma particle-in-cell (PIC) simulation code using a method which adds very little overhead to the parallel code. In PIC codes, the orbits of many interacting plasma electrons and ions are followed as an initial value problem as the particles move in electromagnetic fields calculated self-consistently from the particle motions. The code was implemented using the GCPIC algorithm in which the particles ar… more
Date: December 31, 1990
Creator: Liewer, P. C.; Leaver, E. W.; Decyk, V. K. & Dawson, J. M.
Partner: UNT Libraries Government Documents Department
open access

Advances in high temperature components for AMTEC (alkali metal thermal-to-electric converter)

Description: 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… more
Date: December 31, 1991
Creator: Williams, R. M.; Jeffries-Nakamura, B.; Underwood, M. L.; Ryan, M. A.; O`Connor, D. & Kikkert, S.
Partner: UNT Libraries Government Documents Department
open access

The Meaning and Intensity of the Near-Death Experience

Description: Article exploring the hypothesis that near-death experiencers (NDErs) assign the meaning of the NDE by using causal (effect) and semantic (affect) attributions. To test this hypothesis, 32 spontaneous verbal accounts of NDEs were analyzed.
Date: Winter 1998
Creator: Sahlman, James M. & Norton, Max C.
Partner: UNT Libraries
open access

The Phenomenology of Near-Death Consciousness in Past-Life Regression Therapy: A Pilot Study

Description: Article reporting the results of a pilot study exploring similarities between the phenomenology of post-death awareness reported by regressed subjects and the phenomenology of near-death experiences (NDE), as far as the therapeutic modality normally accommodates post-death phenomena. Similarities and differences between NDEs and post-death regression phenomena suggest new avenues of research.
Date: Autumn 1998
Creator: Wade, Jenny
Partner: UNT Libraries
open access

Physically Transcendent Awareness: A Comparison of the Phenomenology of Consciousness Before Birth and After Death

Description: Article discussing veridical evidence of a physically transcendent source of consciousness, which comes from both extremes of the life span when central nervous system functioning is compromised, suggesting that some form of personhood can exist independently of known cellular processes associated with the body.
Date: Summer 1998
Creator: Wade, Jenny
Partner: UNT Libraries
open access

Near-Death Utopias: Now or Later?

Description: Article suggesting that researchers look first for indications of ideal social order in near-death narratives, and only later compare them with types of utopias.
Date: Winter 1991
Creator: Charmaz, Kathy
Partner: UNT Libraries
open access

Near-Death Experiences, Shamanism, and the Scientific Method

Description: Article discussing the overlap between shamanism and near-death experiences (NDEs) and suggesting that the study of shamanism would be helpful in more fully understanding this phenomena and beginning the development of an applied methodology. Although it may be difficult to verify subjective accounts of NDEs and shamanic journeys, from a clinical standpoint it may not be necessary to do so in order to develop a technique that passes the test of scientific scrutiny.
Date: Spring 1998
Creator: Green, J. Timothy
Partner: UNT Libraries
open access

Response to the Twemlow Paper

Description: Article responding to Stuart Twemlow's discussion of UFO abduction experiences paralleled with near-death experiences.
Date: Summer 1994
Creator: Lawson, Alvin H.
Partner: UNT Libraries
open access

Describing the Light: Attribution Theory as an Explanation of the Near-Death Experience

Description: Article exploring near-death experiences and attribution theory, which focuses on how information is used to create causal inferences and answer causal questions. The finding that near-death experiencers (NDErs) rarely describe unknown events, characters, or objects suggests that NDErs make attributions to answer why these experiences occurred. Examining various descriptions of NDEs demonstrates how attribution theory explains individuals' descriptions of their NDEs.
Date: Spring 1995
Creator: Norton, Max C. & Sahlman, James M.
Partner: UNT Libraries
open access

Six Studies of Out-of-Body Experiences

Description: Article reviewing six studies of a basic component of the near-death experience (NDE), the out-of body experience (OBE).
Date: Winter 1998
Creator: Tart, Charles T.
Partner: UNT Libraries
open access

A Critique of Kellehear's Transcendent Society

Description: Article responding to Allen Kellehear's cultural analysis based on nine Mormon near-death experiences (NDEs) did not reflect the diversity of near-death visions from other cultures. It suggests that these Mormon NDEs were neither as utopian as Kellehear assumed nor representative of contemporary NDE reports, and that a more complete analysis would reveal a variety of NDEs and otherworld visions reflecting the experiencers' sociocultural background.
Date: Winter 1991
Creator: Mickel, Howard A.
Partner: UNT Libraries
open access

A Projective Geometry for Separation Experiences

Description: Article presenting a projective geometry for out-of-body "separation experiences," built up out of a series of higher space analogies and resulting diagrams.
Date: Spring 1999
Creator: Greene, F. Gordon
Partner: UNT Libraries
open access

Motifs of Passage into Worlds Imaginary and Fantastic

Description: Article matching phenomena associated with the passage into otherworlds as reported during out-of-body and near-death experiences, with imagery associated with the passage into otherworlds as depicted in classic modern fantasies and fairy tales.
Date: Summer 1992
Creator: Greene, F. Gordon
Partner: UNT Libraries
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