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GPHS motion studies for heat pulse intervals of reentries from gravity-assist trajectories. [General Purpose Heat Source Module (GPHS)]

Description: Motion studies of the General Purpose Heat Source Module, GPHS, were conducted in the heat pulse interval associated with entries from earth gravity assist trajectories. The APL six-degree-of-freedom reentry program designated TMAGRA6C was used. The objectives of the studies were to (1) determine the effect of ablation on GPHS motion, and (2) determine whether the GPHS module entering the earth's atmosphere from an earth-gravity-assist trajectory has a preferred orientation during the heat puls… more
Date: March 1, 1990
Creator: Lucero, E. F. & Sharbaugh, R. C.
Partner: UNT Libraries Government Documents Department
open access

Analysis of thermally-stable electron transport factors from the hyperthermophilic archaebacterium Pyrodictium brockii

Description: The mechanisms by which hyperthermophilic archaebacteria grow and carry out metabolic functions at elevated temperatures have yet to be determined. The objective of this work is to develop an understanding of the metabolic characteristics of, and the electron transport enzymes involved in, hydrogen/sulfur transformation by hyperthermophilic archaebacteria. Efforts focus on the autotrophic H{sub 2}-oxidizing bacterium, Pyrodictium brockii which has an optimum growth temperature of 105{degrees}C.… more
Date: September 1, 1992
Partner: UNT Libraries Government Documents Department
open access

Preliminary reentry safety assessment of the General Purpose Heat Source module for the Cassini mission: Aerospace Nuclear Safety Program

Description: As asked by the U. S. Department of Energy/Office of Special Applications, and in support of the Environmental Impact Statement for the Cassini mission, The Johns Hopkins University/Applied Physics Laboratory (JHU/APL) has conducted preliminary one-dimensional ablation and thermal analyses of the General Purpose Heat Source (GPHS). The predicted earth entry conditions provided by the Jet Propulsion Laboratory (JPL) for a Cassini Venus-Venus-Earth-Jupiter Gravity Assist (VVEJGA) trajectory were … more
Date: April 1, 1993
Creator: Conn, D. W. & Brenza, P. T.
Partner: UNT Libraries Government Documents Department
open access

Studies of relativistic heavy ion collisions. Annual progress report, August 1, 1992--July 31, 1993

Description: With the completion of the experimental runs with the DLS, which included both heavy ion and nucleon projectiles and targets, is being completed the analysis of these high statistics experiments. The Hopkins group has a major responsibility in comparing the experimental results with recently developed simulation codes for a theoretical comparison. The second major activity involves the STAR experiment at RHIC, to continued involvement with simulations and development of prototypes of detector s… more
Date: August 1, 1993
Creator: Madansky, L.
Partner: UNT Libraries Government Documents Department
open access

Genes and gene expression: Localization, damage and control -- A multi-level and interdisciplinary study. Progress report, February 1, 1992--January 31, 1993

Description: This progress report describes gains made in three projects entitled (1) 3-Dimensional nuclear topography of genes and chromosomes in interphase nuclei, (2) Sequence specific identification and perturbation of the genomic DNA in living cells by nonionic oligonucleotide analogs (Matagen), and Resolution and isolation of specific DNA restriction fragments.(DT)
Date: August 1, 1992
Creator: Ts`o, P. O. P.
Partner: UNT Libraries Government Documents Department
open access

(Development of a Human Genome Data Base)

Description: This report describes managerial aspects and briefly some technical accomplishments a Human Genome Database in Baltimore.
Date: January 1, 1992
Partner: UNT Libraries Government Documents Department
open access

Follow-up investigations of GPHS motion during heat pulse intervals of reentries from gravity-assist trajectories. Aerospace Nuclear Safety Program

Description: Motion studies of the General Purpose Heat Source Module, GPHS, which were conducted in the heat pulse intervals associated with entries from earth gravity assist trajectories. The APL six-degree-of-freedom reentry program designated TMAGRA6C was used. The objectives of the studies were to (1) determine whether the GPHS module entering the earth`s atmosphere from an earth-gravity-assist trajectory has a preferred orientation during the heat pulse of reentry, (2) determine the effect of magnus f… more
Date: March 23, 1992
Creator: Sharbaugh, R. C.
Partner: UNT Libraries Government Documents Department
open access

GPHS motion studies for heat pulse intervals of reentries from gravity-assist trajectories. Aerospace Nuclear Safety Program

Description: Motion studies of the General Purpose Heat Source Module, GPHS, were conducted in the heat pulse interval associated with entries from earth gravity assist trajectories. The APL six-degree-of-freedom reentry program designated TMAGRA6C was used. The objectives of the studies were to (1) determine the effect of ablation on GPHS motion, and (2) determine whether the GPHS module entering the earth`s atmosphere from an earth-gravity-assist trajectory has a preferred orientation during the heat puls… more
Date: March 1, 1990
Creator: Lucero, E. F. & Sharbaugh, R. C.
Partner: UNT Libraries Government Documents Department
open access

Aerodynamic, structural, and trajectory analysis of ASTRID-1 vehicle

Description: The Johns Hopkins University/Applied Physics Laboratory, JHU/API, in support of Lawrence Livermore National Laboratory, LLNL, is conducting aerodynamic, trajectory, and structural analysis of the Advanced Single Stage Technology Rapid Insertion Demonstration (ASTRID) vehicle, being launched out of Vandenberg Air Force Base (VAFB) in February 1994. The launch is designated ASTRID-1 and is the first in a series of three that will be launched out of VAFB. Launch dates for the next two flights have… more
Date: February 10, 1994
Creator: Glover, L. S.; Iwaskiw, A. P.; Oursler, M. A.; Perini, L. L. & Schaefer, E. D.
Partner: UNT Libraries Government Documents Department
open access

Rehabilitation of the South Jetty, Ocean City, Maryland

Description: Partial abstract: Frequent dredging requirements and scouring at the foundation of Ocean City Inlet's south jetty resulted in a study to determine the source of the shoaling and scouring. The study concluded that sand was being transported northward along Assateague Island, through and over the south jetty, and deposited inside the inlet. The sand was then transported north by ebb currents where it encroached on the Federal navigation channel. A rehabilitation program was initiated to create a … more
Date: March 1994
Creator: Bass, Gregory P.; Fulford, Edward T.; Underwood, Steven G. & Parson, Larry E.
Partner: UNT Libraries Government Documents Department
open access

Beach and Borrow Site Sediment Investigation for a Beach Nourishment at Ocean City, Maryland

Description: Report describing the methodology used to sample and analyze sediment at Ocean City, Maryland as part of a beach nourishment project. During the project, sediment was moved from borrow sites to construct parts of the beach area; both the borrow sites and native beach were tested.
Date: May 1990
Creator: Anders, Fred J. & Hansen, Mark
Partner: UNT Libraries Government Documents Department
open access

Genes and gene expression: Localization, damage and control -- A multi-level and interdisciplinary study

Description: This progress report describes gains made in three projects entitled (1) 3-Dimensional nuclear topography of genes and chromosomes in interphase nuclei, (2) Sequence specific identification and perturbation of the genomic DNA in living cells by nonionic oligonucleotide analogs (Matagen), and Resolution and isolation of specific DNA restriction fragments.(DT)
Date: August 1, 1992
Creator: Ts'o, P.O.P.
Partner: UNT Libraries Government Documents Department
open access

Spectroscopic diagnostics of high temperature plasmas, January 1, 1991--December 31, 1991

Description: During 1991, the activities of the John Hopkins University Plasma Spectroscopy Group have covered several areas of research, in the domain of XUV spectroscopy of magnetically confined fusion plasmas. While the main effort concentrated on the development of novel diagnostics which utilize Layered Synthetic Microstructures (LSMs) as the dispersive/filtering elements, work has been done in the area of detector development and the physics of the tokamak edge plasma. An XUV monochromator for the 20-… more
Date: December 31, 1991
Partner: UNT Libraries Government Documents Department
open access

Investigation of the processes controlling the flame generation of refractory materials. Progress report, July 1, 1991--June 30, 1992

Description: The processes involved in the formation of mixed oxides powders were studied using the counterflow diffusion flame burner. Powders of different morphologies were obtained by varying the flame conditions (temperature, residence time) and the concentration ratio of the oxides precursors. In-situ particle size and number density were determined using dynamic light scattering and 90{degrees} light scattering. A thermophoretic sampling method and a larger scale powder collection device also was used… more
Date: January 1, 1992
Creator: Katz, J. L.
Partner: UNT Libraries Government Documents Department
open access

Analysis of thermally-stable electron transport factors from the hyperthermophilic archaebacterium Pyrodictium brockii. Progress report

Description: The mechanisms by which hyperthermophilic archaebacteria grow and carry out metabolic functions at elevated temperatures have yet to be determined. The objective of this work is to develop an understanding of the metabolic characteristics of, and the electron transport enzymes involved in, hydrogen/sulfur transformation by hyperthermophilic archaebacteria. Efforts focus on the autotrophic H{sub 2}-oxidizing bacterium, Pyrodictium brockii which has an optimum growth temperature of 105{degrees}C.… more
Date: September 1, 1992
Partner: UNT Libraries Government Documents Department
open access

STAR Electromagnetic Calorimeter R&D Progress Report, 1 October 1992--31 August 1993

Description: A lead-scintillator sampling electromagnetic calorimeter (EMC) is planned as an upgrade to the STAR detector for the RHIC Accelerator at Brookhaven National Laboratory (BNL). Considerable work on the conceptual design of the calorimeter, and related interfacing issues with the solenoids magnet and the time projection chamber (TPC) subsystems of STAR occurred in the period 1 October 1992 to 31 August 1993 (FY 1993). This report documents and summarizes the conclusions and progress from this work. more
Date: October 1, 1993
Partner: UNT Libraries Government Documents Department
open access

Follow-up investigations of GPHS motion during heat pulse intervals of reentries from gravity-assist trajectories

Description: Motion studies of the General Purpose Heat Source Module, GPHS, which were conducted in the heat pulse intervals associated with entries from earth gravity assist trajectories. The APL six-degree-of-freedom reentry program designated TMAGRA6C was used. The objectives of the studies were to (1) determine whether the GPHS module entering the earth's atmosphere from an earth-gravity-assist trajectory has a preferred orientation during the heat pulse of reentry, (2) determine the effect of magnus f… more
Date: March 23, 1992
Creator: Sharbaugh, R. C.
Partner: UNT Libraries Government Documents Department
open access

Users manual for Aerospace Nuclear Safety Program six-degree-of-freedom reentry simulation (TMAGRA6C)

Description: This report documents the updated six-degree-of-freedom reentry simulation TMAGRA6C used in the Aerospace Nuclear Safety Program, ANSP. The simulation provides for the inclusion of the effects of ablation on the aerodynamic stability and drag of reentry bodies, specifically the General Purpose Heat Source, GPHS. The existing six-degree-of-freedom reentry body simulations (TMAGRA6A and TMAGRA6B) used in the JHU/APL Nuclear Safety Program do not include aerodynamic effects resulting from geometri… more
Date: February 1, 1990
Creator: Sharbaugh, R. C.
Partner: UNT Libraries Government Documents Department
open access

Regional aerosol deposition in human upper airways

Description: During the current report experimental studies of upper respiratory deposition of radon progeny aerosols and stimulant aerosols were carried out in replicate casts of nasal and oral passages of adults and children. Additionally, preliminary studies of nasal passage deposition of unattached Po{sup 218} particles was carried out in four human subjects. Data on nasal inspiratory deposition in replicate models of adults and infants from three collaborating laboratories were compared and a best-fit … more
Date: November 1, 1991
Creator: Swift, David L.
Partner: UNT Libraries Government Documents Department
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