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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
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The P/Giacobini-Zinner Magnetotail

Description: On September 11, 1985 the International Cometary Explorer passed behind Comet Giacobini-Zinner with a closest approach distance of 7800 km. In agreement with Alfven's interplanetary magnetic field line draping model of cometary type I tails, a well defined 1 x 10/sup 4/ km diameter magnetotail was observed downstream of the inner coma. This study uses the ICE magnetic field, plasma electron, plasma wave, and energetic ion observations to investigate the structure and stability of the Giacobini-… more
Date: January 1, 1986
Creator: Slavin, J. A.; Smith, E. J.; Daly, P. W.; Flammer, K. R.; Gloeckler, G.; Goldberg, B. A. et al.
Partner: UNT Libraries Government Documents Department
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The comet Giacobini-Zinner magnetotail: Axial stresses and inferred near-nucleus properties

Description: Utilizing the electron and magnetic field data from the ICE tail traversal of Comet Giacobini-Zinner along with the MHD equations, we have developed a steady state, stress balance model of the cometary magnetotail. With it we infer many important but unmeasured ion properties within the G-Z magnetotail both at ICE and upstream at the average point along each streamline where cometary ions are picked-up. The derived tailward ion flow speed at ICE is quite constant at approx.-20 to -30 km/sec acr… more
Date: October 1, 1986
Creator: McComas, D. J.; Gosling, J. T.; Bame, S. J.; Slavin, J. A.; Smith, E. J. & Steinberg, J. L.
Partner: UNT Libraries Government Documents Department
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MHD waves detected by ice at distances > 28 x 10/sup 6/ km from Comet Halley: Cometary or solar wind origin

Description: Spectral analyses of the high resolution magnetic field data are employed to determine if there is evidence of cometary heavy ion pickup when ICE was closest to Halley, approx.28 x 10/sup 6/ km. No evidence is found for the presence of heavy ion cyclotron waves. However, from this search, two new wave modes are discovered in the solar wind: electromagnetic ion cyclotron waves and drift mirror mode waves. Both modes have scales of 10 to 60 s (1 to 6 T/sub p/) in the spacecraft frame. The possibi… more
Date: January 1, 1986
Creator: Tsurutani, B. T.; Brinca, A. L.; Smith, E. J.; Thorne, R. M.; Scarf, F. L.; Gosling, J. T. et al.
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
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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

SP-100, a project manager`s view. Technical information report

Description: Born to meet the special needs of America`s space effort, the SP-100 Program testifies to the cooperation among government agencies. The Department of Energy (DOE), the National Aeronautics and Space Administration (NASA), and the Defense Advanced Research Projects Agency (DARPA) are working together to produce a 100-kW power system for use in outer space. At this point in the effort, it is appropriate to review: The approach to meet program goals; the status of activities of the Project Office… more
Date: December 1, 1983
Creator: Truscello, V. C.
Partner: UNT Libraries Government Documents Department
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External flow radiators for reduced space powerplant temperatures. Technical information report

Description: Nuclear space powerplants can operate at temperatures below 900 K and use stainless steel construction without a weight penalty if new radiator concepts can achieve radiator weights of 1-3 kg/m{sup 2}. Conventional tube-and-fin radiators weight about 10 kg/m{sup 2} because of heavy tube walls to prevent meteroid puncture. Radiator designs that do not require meteroid protection are possible; they operate with fluids of low vapor pressure that can be exposed directly to space in external-flow ra… more
Date: January 1, 1984
Creator: Elliott, D. G.
Partner: UNT Libraries Government Documents Department
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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 Near Death Experience as a Product of Isolated Subcortical Brain Function

Description: Article attempting to show that the sequence of a typical near-death experience (NDE) is predictable and reproducible, enough to suggest that the NDE is a symptom of a specific altered mental state seen in a large number of medical and surgical conditions.
Date: Winter 2000
Creator: Wettach, George E.
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

The Structure and Function of Near-Death Experiences: An Algorithmic Reincarnation Hypothesis

Description: Article examining a modification of the traditional doctrine of reincarnation that takes into account biological and cultural evolution. This allows an understanding of how the attributes of NDEs could have undergone selection even though all opportunities for mating have already passed at the time of death.
Date: Winter 2001
Creator: Murphy, Todd
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

Six Major Challenges Faced by Near-Death Experiencers

Description: Article shedding light on some of the unique personal and spiritual challenges that people face following near-death experiences (NDEs).
Date: Autumn 2006
Creator: Stout, Yolaine M.; Jacquin, Linda A. & Atwater, P. M. H.
Partner: UNT Libraries
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