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A prototype implementation of a network-level intrusion detection system. Technical report number CS91-11

Description: This paper presents the implementation of a prototype network level intrusion detection system. The prototype system monitors base level information in network packets (source, destination, packet size, time, and network protocol), learning the normal patterns and announcing anomalies as they occur. The goal of this research is to determine the applicability of current intrusion detection technology to the detection of network level intrusions. In particular, the authors are investigating the possibility of using this technology to detect and react to worm programs.
Date: May 15, 1991
Creator: Heady, R.; Luger, G.F.; Maccabe, A.B.; Servilla, M. & Sturtevant, J.
Partner: UNT Libraries Government Documents Department

Study of chip-breaking mechanisms in orthogonal cutting. Technical report, April 1, 1990--June 30, 1991

Description: This report summarizes the activities of the research project entitled {open_quotes}Study of Chip Breaking Mechanisms in Orthogonal Cutting{close_quotes}. The research effort took place from April 1990 to June 1991. The overall objective of the project was to develop a systematic procedure for gaining a more fundamental understanding of chip breaking mechanics. Central to this objective is a computer model that can simulate chip formation in orthogonal cutting. This model has been under development for the past seven years at NCSU. The model is based on an Eulerian formulation of the finite element technique. The model simulates the cutting process for various tool geometries over a wide range of cutting conditions. The model can be used to predict chip geometry, cutting forces, plastic strains, strain rates, and temperatures in the workpiece and chip, as well as temperatures in the tool itself. Of particular significance is that specific tool geometries can be simulated. Therefore, the model can be used to systematically evaluate the strains, strain rates, temperature, and geometry of the chip as a function of a specific chip-breaker tool design. These results can provide the crucial information necessary to formulate a fundamental understanding of the chip breaking mechanism over a wide range of operating conditions and workpiece materials.
Date: July 15, 1991
Creator: Strenkowski, J.S.
Partner: UNT Libraries Government Documents Department

EMP on a NTS experiment

Description: This report is a compilation of two previous sets of pretest calculations, references 1 and 2 and the grounding and shielding report, reference 3. The calculations performed in reference 1 were made for the baseline system, with the instrumentation trailers not isolated from ground, and wider ranges of ground conductivity were considered. This was used to develop the grounding and shielding plan included in the appendix. The final pretest calculations of reference 2 were performed for the modified system with isolated trailers, and with a better knowledge of the ground conductivity. The basic driving mechanism for currents in the model is the motion of Compton electrons, driven by gamma rays, in the air gaps and soil. Most of the Compton current is balanced by conduction current which returns directly along the path of the Compton electron, but a small fraction will return by circuitous paths involving current flow on conductors, including the uphole cables. The calculation of the currents is done in a two step process -- first the voltages in the ground near the conducting metallic structures is calculated without considering the presence of the structures. These are then used as open circuit drivers for an electrical model of the conductors which is obtained from loop integrals of Maxwell`s equations. The model which is used is a transmission line model, similar to those which have been used to calculate EMP currents on buried and overhead cables in other situations, including previous underground tests, although on much shorter distance and time scales, and with more controlled geometries. The behavior of air gaps between the conducting structure and the walls of the drift is calculated using an air chemistry model which determines the electron and ion densities and uses them to calculate the air conductivity across the gap.
Date: October 15, 1991
Creator: Gilbert, J.; van Lint, V. & Sherwood, S.
Partner: UNT Libraries Government Documents Department

Native Americans and Yucca Mountain: A revised and updated summary report on research undertaken between 1987 and 1991; Volume 2

Description: This report consists of Yucca Mountain Project bibliographies. It is the appendix to a report that summarizes data collected between September 1986 and September 1988 relative to Native American concerns involving the potential siting of a high-level nuclear waste repository at Yucca Mountain, Nevada. The data were collected from Western Shoshone and Southern Paiute people upon whose aboriginal lands the repository potentially is to be located. Western Shoshone people involved in the study were those resident or affiliated with reservation communities at Yomba and Duckwater, Nevada, and Death Valley, California. Southern Paiute people were at reservation communities at Moapa and Las Vegas. Additional persons of Western Shoshone and Southern Paiute descent were interviewed at Beatty, Tonopah, Caliente, Pahrump, and Las Vegas, Nevada. The work was part of a larger project of socioeconomic studies for the State of Nevada`s Nuclear Waste Projects office, conducted by Mountain West of Phoenix, Arizona.
Date: October 15, 1991
Creator: Fowler, C.S.
Partner: UNT Libraries Government Documents Department

Native Americans and Yucca Mountain: A revised and updated summary report on research undertaken between 1987 and 1991; Volume 1

Description: This report summarizes data collected between September 1986 and September 1988 relative to Native American concerns involving the potential siting of a high-level nuclear waste repository at Yucca Mountain, Nevada. The data were collected from Western Shoshone and Southern Paiute people upon whose aboriginal lands the repository potentially is to be located. Western Shoshone people involved in the study were those resident or affiliated with reservation communities at Yomba and Duckwater, Nevada, and Death Valley, California. Southern Paiute people were at reservation communities at Moapa and Las Vegas. Additional persons of Western Shoshone and Southern Paiute descent were interviewed at Beatty, Tonopah, Caliente, Pahrump, and Las Vegas, Nevada. The work was part of a larger project of socioeconomic studies for the State of Nevada`s Nuclear Waste Projects office, conducted by Mountain West of Phoenix, Arizona.
Date: October 15, 1991
Creator: Fowler, C.S.
Partner: UNT Libraries Government Documents Department

Cavity design and beam simulations for the APS rf gun

Description: An earlier note discussed the preliminary design of the 1-1/2 cell RF cavity for the APS RF gun. This note describes the final design, including cavity properties and simulation results from the program rf gun. The basic idea for the new design was that the successful SSRL design could be improved upon by reducing fields that had nonlinear dependence on radius. As discussed previously, this would reduce the emittance and produce tighter momentum and time distributions. In addition, it was desirable to increase the fields in the first half-cell relative to the fields in the second half-cell, in order to allow more rapid initial acceleration, which would reduce the effects of space charge. Both of these goals were accomplished in the new design.
Date: November 15, 1991
Creator: Borland, M.
Partner: UNT Libraries Government Documents Department

[Letter from Cassandra Broadus to Melinda Meyer, Linda Powell and Marilyn Ingram, February 15, 1991]

Description: Photocopy of a letter from Cassandra Broadus, North Texas Institute for Educators on the Visual Arts, to Melinda Meyer, Linda Powell and Marilyn Ingram. In regards to their upcoming meeting Thursday, February 21, at the Modern Art Museum of Fort Worth. The topic of discussion is the art column for the Fort Worth Star Telegram children's newspaper "Class Acts."
Date: February 15, 1991
Creator: Broadus, Cassandra
Partner: UNT Libraries Special Collections

[Letter from John Grisby to Bill McCarter and Jack Davis, October 15, 1991]

Description: Photocopy of a letter from John Grisby, Superintendent of Pilot Point ISD, to Bill McCarter and Jack Davis, co-directors of North Texas Institute for Educators on the Visual Arts. In regards to Pilot Points' commitment as a full time partner in the North Texas Institute for Educators on the Visual Arts as well as the participation of Sylvia Russel, Associate Director and Site Coordinator for Pilot Point during the 1992 school year. Grisby has attached to the letter stipend worksheets based on the salary of the faculty to be involved with the institute. There is a letter from Bill McCarter and Jack Davis, asking of Grisby to send them the requested materials so they can report back to the Getty Center for their proposal.
Date: October 15, 1991
Creator: Grisby, John
Partner: UNT Libraries Special Collections

Coal distribution, January--September 1990. [Contains glossary]

Description: This issue presents information for January through September 1990. Coal distribution data are shown by coal-producing state of origin, consumer use, method of transportation, and state of destination. All data in this report for 1990 are preliminary. Data for previous years are final. 6 figs., 34 tabs.
Date: January 15, 1991
Partner: UNT Libraries Government Documents Department

Hydrocarbons associated with brines from geopressured wells

Description: The purpose of this research is to determine the concentration of the cryocondensates in fluids of the various USDOE Geopressured wells as a function of production volume. The wells are visited each month that they are operating and samples are to be taken cryogenically during each visit. A gas scrubbing system will continuously samples the gas streams of the wells in the intervals between visit. Collectors, exchanged daily by site personnel, are retrieved on each visit.
Date: July 15, 1991
Partner: UNT Libraries Government Documents Department

Hydrocarbons associated with brines from geopressured wells

Description: The purpose of this research is to determine the concentration of the cryocondensates in fluids of the various USDOE Geopressured wells as a function of production volume. The wells are visited each month that they are operating and samples are to be taken cryogenically during each visit. A gas scrubbing system will continuously samples the gas streams of the wells in the intervals between visit. Collectors, exchanged daily by site personnel, are retrieved on each visit. Results for the reporting period are presented.
Date: January 15, 1991
Partner: UNT Libraries Government Documents Department

Hydrocarbons associated with brines from geopressured wells

Description: Efforts to determine the concentration of the cryocondensates in fluids of the various USDOE Geopressured wells a function of production volume. The wells are visited monthly as they are operating and samples are reported taken cryogenically during each visit. A gas scrubbing system continuously sample the gas streams of the wells in the intergas scrubbing system continuously sample the gas streams of the wells in the intervals between visit. Results obtained are to correlated the production of the collected compounds with reservoir and well production characteristics.
Date: October 15, 1991
Partner: UNT Libraries Government Documents Department

Synthesis of a naphthalene-hydroxynaphthalene polymer model compound

Description: The goal is to synthesize a new naphthalene-hydroxynaphthalene polymer model compound for use in coal combustion studies. This effort will also require the development of a synthetic procedure to synthesize this compound since it is unreported. Our synthesis efforts have resulted in the preparation of a number of potential precursors and intermediates. These compounds were submitted to the Organic Chemistry Research Area's Analytical Section for characterization and identification. The synthesis of the pre-Bakelite intermediate has continued to be the focus of our efforts. We first modified the target intermediate slightly to allow this compound to be obtained by a more direct route, using commercially available materials. Since then, we have further simplified intermediate to expedite our evaluation of the feasibility of the Bakelite process for the final polymerization, the key step of our suggested scheme.
Date: January 15, 1991
Creator: Kwong, C.D.
Partner: UNT Libraries Government Documents Department

[News Clip: Tax Man]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 6 P.M.
Date: April 15, 1991
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections