| Sea Spray Icing of Drilling and Production Platforms |
Feb-2009 |
63 pages |
| Authors:
Edgar L Andreas; Kathleen F Jones; ENGINEER RESEARCH AND DEVELOPMENT CENTER HANOVER NH COLD REGIONS RESEARCH AND ENGINEERING LAB
|
 | Because of the observed decrease in the ice cover in the Beaufort and Chukchi Seas, it is possible that spray icing of rigs used for oil exploration and drilling may be more frequent and possibly more severe in the coming years than it has been in the past. In this report we describe a model for sea spray icing on fixed offshore structures. The accretion of small sea spray droplets ... |
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| Methods for Improving the Tractability of the Block Sequencing Problem for Open Pit Mining |
01-Jul-2008 |
159 pages |
| Authors:
Martin P Gaupp; COLORADO SCHOOL OF MINES GOLDEN
|
| A surface mine optimizes its profits by maximizing the net present value (NPV) of minerals extracted from the orebody. This is accomplished by creating a production schedule that defines when each section, or block, of ore is removed. Doing so efficiently requires adherence to geospatial and operational constraints. A common exact method for determining this block extraction sequence is formulating the problem as a mixed integer program where each block ... |
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| Solving the Principal - Agent Problem in Iraq: Economic Incentives Create a New Model for Security |
DEC 2007 |
133 pages |
| Authors:
Verlan R. Cole; Jayson L. Cramer; L. S. Hollingsworth; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This report evaluates several alternatives that could be used to form a public policy in Iraq for sharing oil revenues with the Iraqi people. Using the Alaska Permanent Fund dividend as a potential model for Iraq, two key criteria were formulated for comparison and contrast with other alternatives currently available to the Iraqi government. The evaluative criteria were: does the model distribute wealth to the people and does it encourage ... |
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| Manufactured Soil Field Demonstration for Constructing Wetlands to Treat Acid Mine Drainage on Abandoned Minelands |
NOV 2007 |
15 pages |
| Authors:
Charles R. Lee; Dennis L. Brandon; Richard A. Price; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ENVIRONMENTAL LAB
|
| This technical note provides information on the use of dredged material in manufacturing substrate for use in constructing wetlands to treat acid mine drainage from abandoned acid coal minelands. |
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| Defense Contract Management: DOD's Lack of Adherence to Key Contracting Principles on Iraq Oil Contract Put Government Interests at Risk |
JUL 2007 |
42 pages |
| Authors:
John P. Hutton; Marie Ahearn; Penny B. Augustine; Greg Campbell; Jr. James Arthur; Eric Lesonsky; Stephen Lord; Anne McDonough-Hughes; Janet McKelvey; Kenneth Patton; GOVERNMENT ACCOUNTABILITY OFFICE WASHINGTON DC
|
| The Department of Defense's (DoD) U.S. Army Corps of Engineers (Corps) awarded the $2.5 billion Restore Iraqi Oil (RIO I) contract to Kellogg Brown & Root in March 2003 in an effort to reestablish Iraq's oil infrastructure. The contract was also used to ensure adequate fuel supplies inside Iraq. RIO I was a cost-plus-award-fee type contract that provided for payment of the contractor's costs, a fixed fee determined at inception ... |
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| A System for Discovering Bioengineered Threats by Knowledge Base Driven Mining of Toxin Data |
AUG 2006 |
52 pages |
| Authors:
S. Swaminathan; BROOKHAVEN NATIONAL LAB UPTON NY
|
| This project was funded to establish a Toxin Knowledge Base (TKB) which will encompass information about bacterial toxins in general and toxins relevant to biodefense, in particular. The overall goal of this project is to establish an easy to use database viz. a Knowledge Base to populate itself and expand using machine learning techniques, to make it more dynamic. It is designed to be a bioinformatics resource focused on molecular ... |
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| Improving the Performance of a Mixed-Integer Production Scheduling Model for LKAB's Iron Ore Mine, Kiruna, Sweden |
MAY 2006 |
70 pages |
| Authors:
Michael A. Martinez; COLORADO SCHOOL OF MINES GOLDEN
|
| LKAB operates the Kiruna underground iron ore mine, which utilizes a mining method known as large-scale sublevel caving. To optimize production scheduling at Kiruna, we present a combined (short- and long-term) resolution model using mixed-integer programming. The model, which incorporates various operational requirements unique to sublevel caving, minimizes deviations from demand to produce a schedule containing monthly time periods. However, the resulting model is large and solution times for schedules ... |
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| The Geology of Liberia: A Selected Bibliography of Liberian Geology, Geography and Earth Science |
MAY 2006 |
173 pages |
| Authors:
Robert L. Hadden; ARMY TOPOGRAPHIC ENGINEERING CENTER ALEXANDRIA VA
|
| This bibliography on the water and geological information or Liberia was begun in 1995 as a request through the US Department or State by the Government or Liberia. It brings together selected citations from a variety of different cartographic, geographical, geological and hydrological resources and specialized library collections. Most of the citations have location information on where these items can be located and used on site, and either borrowed through ... |
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| Sand Mining Impacts on Long-Term Dune Erosion in Southern Monterey Bay |
2006 |
15 pages |
| Authors:
Edward Thornton; Abby Sallenger; Juan C. Sesto; Laura Egley; Timothy McGee; Rost Parsons; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| Southern Monterey Bay was the most intensively mined shoreline (with sand removed directly from the surf zone) in the U.S. during the period from 1906 until 1990, when the mines were closed following hypotheses that the mining caused coastal erosion It is estimated that the yearly averaged amount of mined sand between 1940 and 1984 was 128,000 m3/yr, which is approximately 50% of the yearly average dune volume loss during ... |
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| Optimizing the Long-Term Capacity Expansion and Protection of Iraqi Oil Infrastructure |
SEP 2005 |
139 pages |
| Authors:
Patrick S. Brown; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis introduces a tri-level defender-attacker-defender optimization model that prescribes how Iraq's oil infrastructure can, over time, be expanded, protected, and operated, even in the face of insurgent attacks. The outer-most defender model is a mixed-integer program that, given a set of anticipated insurgent attacks, specifies a quarterly capital expansion, defense, and operation plan to maximize oil exports over a decade-long planning horizon. The intermediate attacker model, observing the outer ... |
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| A System for Discovering Bioengineering Threats by Knowledge Base Driven Mining of Toxin Data |
AUG 2005 |
33 pages |
| Authors:
Subramanyam Swaminathan; I. V. Ramakrishnan; M. Kifer; H. Davulcu; BROOKHAVEN NATIONAL LAB UPTON NY
|
| The overall goal of this project is to establish a Toxin Knowledge Base (TKB) a bioinformatics resource primarily focused on molecular information about toxins and other virulence factors that are the natural products of biological and potential biological warfare (RW and PBW) agents. The resource will be mined to assimilate synthesize, analyze and disseminate genomic and structural information on BW and PBW genes and their products. The TKB will be ... |
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| A Better Noise Compliance Method and Validation of Mine Noise Dosimetry Data |
JUN 2005 |
18 pages |
| Authors:
Jeremy M. Slagley; Steven E. Guffey; WEST VIRGINIA UNIV MORGANTOWN DEPT OF INDUSTRIAL ENGINEERING
|
| Given the costs of Noise-Induced Hearing Loss in mining, and MSHA's proactive attention given to all mines, an average exposure determination may be more appropriate for compliance decisions than the current shift-by-shift basis. If dose averages are used, database errors must be minimized. Errors in dosimetry data can be detected by a variety of means, including: 1. from an understanding of the mathematics relating action level doses to permissible exposure ... |
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| Active Noise Control of Stageloader Noise in Longwall Mining |
10 FEB 2005 |
22 pages |
| Authors:
Jeremy M. Slagley; Steven E. Guffey; WEST VIRGINIA UNIV MORGANTOWN DEPT OF INDUSTRIAL ENGINEERING
|
| With the large-scale mechanization inherent to the mining industry, noise-induced hearing loss remains a major concern. As part of on-going efforts to develop engineering controls to reduce noise levels in longwall mining, active noise control experiments were conducted above ground on a modified non- working stageloader. Recorded underground stageloader noise was broadcast into the above ground stageloader. The result was an average 7 dBA reduction when the active noise control ... |
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| Phase I and II Archaeological Investigations at Shaw Air Force Base and the Poinsett Electronic Combat Range, Sumter County, South Carolina |
FEB 2005 |
218 pages |
| Authors:
Alvin J. Banguilan; John S. Cable; Charles E. Cantley; Leslie Raymer; Victoria Dabir-Banguilan; NEW SOUTH ASSOCIATES STONE MOUNTAIN GA
|
| This report presents the results of Phase II archaeological testing of three sites 38SU58, 38SU191 and 38SU222 as well as the results of a Phase I survey of three tracks. The tested sites all contained prehistoric cultural materials dating to the Archaic, Woodland and Mississippian periods. Site 38SU58 was determined to be not eligible for nomination to the National Register of Historian Places, while sites 38SU191 and 38SU222 were determined ... |
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| Software Cost Estimation and Sizing Methods: Issues and Guidelines |
2005 |
|
| Authors:
Shari L. Pfleeger; Felicia Wu; Rosalind Lewis; RAND CORP SANTA MONICA CA
|
 | Estimating the size and cost of software is a risky business. When software is a crucial component in numerous space, weapon, aircraft, and information technology projects critical to operations, as it often is for the Air Force, accurate estimates of software costs are essential. Because software size is usually the most influential factor in determining software costs, good estimates of size are critical to good cost estimation. Rather than seeking ... |
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| Assessment of Characteristics and Remedial Alternatives for Abandoned Mine Drainage: Case Study at Staple Bend Tunnel Unit of Allegheny Portage Railroad National Historic Site, Cambria County, Pennsylvania, 2004 |
2005 |
59 pages |
| Authors:
Charles A. Cravotta III; GEOLOGICAL SURVEY RESTON VA
|
| This report describes field, laboratory, and computational methods that could be used to assess remedial strategies for abandoned mine drainage (AMD). During April-June, 2004, the assessment process was applied to AMD from bituminous coal deposits at a test site in the Staple Bend Tunnel Unit of Allegheny Portage Railroad National Historic Site (ALPO-SBTU) in Cambria County, Pennsylvania. The purpose of this study was (1) to characterize the AMD quantity and ... |
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| Rockburst Model Validation |
MAR 2004 |
63 pages |
| Authors:
Kenneth F. Sprenke; Allan C. Rohay; Michael C. Stickney; IDAHO UNIV MOSCOW DEPT OF GEOLOGICAL SCIENCES
|
| Characterization of mining-related seismic events is critical to the implementation of the Comprehensive Nuclear Test-Ban Treaty monitoring system. Mine seismicity from uncontrolled sources are particularly troublesome, with magnitudes up to 4 or 5, producing signal strengths comparable to 1-10 kiloton contained nuclear explosions. The Coeur d'Alene district in northern Idaho is the most rockburst-prone mining district in the United States, producing a daily average of about 3 events with magnitudes ... |
|
| Monitoring and Mining Data Streams |
OCT 2003 |
14 pages |
| Authors:
Stan B. Edonik; BROWN UNIV PROVIDENCE RI
|
| The work of the first year of this effort was to support the implementation of the prototype for the Aurora stream processing engine and to investigate applications for this technology. An initial version of Aurora was completed, and we worked with William Vanderschallie on an Army application that involved water supply threat-level detection. The rest of this report discusses these two activities. |
|
| BAMBOO: Accelerating Closed Itemset Mining by Deeply Pushing the Length-Decreasing Support Constraint |
29 SEP 2003 |
15 pages |
| Authors:
Jianyong Wang; George Karypis; MINNESOTA UNIV MINNEAPOLIS DEPT OF COMPUTER SCIENCE
|
| Previous study has shown that mining frequent patterns with length-decreasing support constraint is very helpful in removing some uninteresting patterns based on the observation that short patterns will tend to be interesting if they have a high support, whereas long patterns can still be very interesting even if their support is relatively low. However, a large number of non-closed (i.e., redundant) patterns can still not be filtered out by simply ... |
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| A Constraint Satisfaction Neural Network Approach for Data Mining Classification and Association Rules in Breast Cancer Databases |
JAN 2003 |
52 pages |
| Authors:
Georgia D. Tourassi; DUKE UNIV MEDICAL CENTER DURHAM NC
|
| We propose to explore an innovative, data mining (DM) process for application in breast cancer (BC) databases. The DM process is the Constraint Satisfaction Neural Network (CSNN). Contrary to feed-toward networks and statistical models, the CSNN has a non- hierarchical architecture that allows it to be used either as a prediction/classification tool or as an analysis tool for mining association rules in databases. This is a feasibility study to investigate ... |
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| A New Approach to Assessing Gas and Oil Resources in the Intermountain West |
FEB 2002 |
|
| Authors:
Tom LaTourrette; Mark Bernstein; Paul Holtberg; Chris Pernin; Ben Vollaard; RAND CORP SANTA MONICA CA
|
| The availability of gas and oil resources in the Intermountain Western United States has become the subject of increased debate in recent years. Several studies have concluded that substantial amounts of gas and oil resources in the region are inaccessible because of legally restricted access to federal lands (e.g., National Petroleum Council, 1999; Advanced Resources International, 2001). Some stakeholders have reacted to the studies by calling for reduced access restrictions, ... |
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| U.S. Government Funding for Science and Technology Cooperation with Russia |
2002 |
|
| Authors:
Caroline Wagner; Irene Brahmakulam; D. J. Peterson; Inda Staheli; Anny Wong; RAND CORP SANTA MONICA CA
|
| The United States government spent, on average, $350 million a year in the 1990s to support science and technology (S&T) cooperation with Russia. The amount rose in the early 1990s, peaked in 1996, and then began dropping in the late 1990s. When aggregated by dollars spent, the areas most likely to be the subject of cooperation are aerospace and aeronautical projects, engineering research, energy, and earth sciences. When counted by ... |
|
| Analysis of Geophysical Logs From Six Boreholes at Lariat Gulch, Former U.S. Air Force Site PJKS, Jefferson County, Colorado |
2002 |
44 pages |
| Authors:
Frederick L. Paillet; Richard E. Hodges; Barbara S. Corland; DEPARTMENT OF THE INTERIOR WASHINGTON DC
|
| This report presents and describes geophysical logs for six boreholes in Lariat Gulch, a topographic gulch at the former U.S. Air Force site PJKS in Jefferson County near Denver, Colorado. Geophysical logs include gamma, normal resistivity, fluid-column temperature and resistivity, caliper, televiewer, and heat-pulse flowmeter. These logs were run in two boreholes penetrating only the Fountain Formation of Pennsylvanian and Permian age (logged to depths of about 65 and 570 ... |
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| U.S. Fish and Wildlife Service: Information on Oil and Gas Activities in the National Wildlife Refuge System |
31 OCT 2001 |
18 pages |
| Authors:
GENERAL ACCOUNTING OFFICE WASHINGTON DC
|
| This report responds to a request for specific information on activities related to oil and gas development and production that occurs in the U.S. Fish and Wildlife Service's National Wildlife Refuge System. The first national wildlife refuge was created in 1903 when President Theodore Roosevelt set aside a tiny island off the east coast of Florida for the protection of pelicans and other species of birds. Since then, the National ... |
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| New Forces at Work in Mining: Industry Views of Critical Technologies |
2001 |
|
| Authors:
D. J. Peterson; Tom LaTourrette; James T. Bartis; RAND CORP SANTA MONICA CA
|
| This report presents an overview of technologies critical to the economic health of the mining and quarrying industries in the United States. The findings were derived from confidential discussions with leading representatives of 58 mining firms, equipment manufacturers, research institutions, and other organizations who were selected for their prominent positions in the industry and their ability to think broadly and creatively about current technology trends. The study was commissioned by ... |
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| Analysis of the Administration's Proposal to Ensure Solvency of the United Mine Workers of America Combined Benefit Fund |
15 AUG 2000 |
48 pages |
| Authors:
GENERAL ACCOUNTING OFFICE WASHINGTON DC ACCOUNTING AND INFORMATION MANAGEMENT DIV
|
| This report reviews the administration's proposal to ensure the solvency of the United Mine Workers of America (UMWA) Combined Benefit Fund. Specifically, we analyze the impact of the administration's proposal to (1) extend the Abandoned Mine Land Reclamation (AML) fees, (2) reverse the effects of National Coal v. Chater (National Coal), (3) reverse the effects of Dixie Fuel Company v. Social Security Administration (Dixie Fuel, ... |
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| Acid Mine Drainage Treatment |
MAY 2000 |
7 pages |
| Authors:
Jon Fripp; Paul F. Ziemkiewicz; Hari Charkavorki; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
|
| Contaminated water flowing from abandoned coal mines is one of the most significant contributors to water pollution in former and current coal- producing areas. Acid mine drainage (AMD) can have severe impacts to aquatic resources, can stunt terrestrial plant growth and harm wetlands, contaminate groundwater, raise water treatment costs, and damage concrete and metal structures. In the Appalachian Mountains of the eastern United States alone, more than 7,500 miles of ... |
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| Piston Coring Capabilities at SACLANTCEN: Minimizing and Assessing Core Disturbance |
NOV 1999 |
37 pages |
| Authors:
John C. Osler; Lavinio Gualdesi; Enzo Michelozzi; Briano Tonarelli; SACLANT UNDERSEA RESEARCH CENTRE LA SPEZIA (ITALY)
|
| Piston and gravity coring are techniques used to collect samples of seabed material. There are many variables that can be adjusted when operating a piston corer, such as free-fall height, core liner material, weight, piston friction, rigging, and winch speed. In order to develop a capability at SACLANTCEN to collect longer cores with minimal disturbance, the aforementioned variables were adjusted in a systematic manner in ... |
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| Evaluation of Passive Systems for the Treatment of Mine Drainage |
MAY 1999 |
234 pages |
| Authors:
Heath C. Roscoe; PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF CIVIL ENGINEERING
|
| Acid Mine Drainage (AMD) is a serious environmental problem and the focus of a great deal of research. Passive treatment systems associated with wetlands and Anoxic Limestone Drains (ALDs) provide a low-cost, low-maintenance treatment in contrast to continuous chemical metering. The ALD adds alkalinity to the water allowing for a more rapid formation of iron precipitates. The abiotic oxidation ponds associated with these systems are expected to precipitate about 10-20 ... |
|
| Field Testing of a Prototype Heat Stress Monitor: System Performance andApplicability to Commercial Mining in Australia |
APR 1999 |
19 pages |
| Authors:
William T. Matthew; Julio A. Gonzalez; Richard R. Gonzalez; Graham Bates; Cathryn Gazey; CURTIN UNIV OF TECHNOLOGY PERTH (AUSTRALIA) SCHOOL OF PUBLIC HEALTH
|
| Under a Cooperative Research and Development Agreement (CRDA), a prototype environmental Heat Stress Monitor (HSM) originally developed for military use, was evaluated for potential applications as a heat stress management tool in the Australian mining industry. The hand-held electronic HSM combines a thermal strain prediction model with an integrated environmental sensor suite that measures air temperature, humidity, wind speed, and solar radiation, to provide tailored guidance on hourly drinking water ... |
|
| Tunnel Closure Experiment, 1997 Test Programme: Core Logging and Laboratory Tests on Diamond Drilled Holes at Jerntoppen |
08 JUN 1998 |
71 pages |
| Authors:
Panayiotis Chryssanthakis; Vidar Kveldsvik; NORWEGIAN GEOTECHNICAL INST OSLO
|
| The Tunnel Closure Experiment 1997 Test Programme included seven tunnel response tests and two tunnel portal tests. The tests were carried out in August 1997 (eight tests) and September 1997 (one test) in AS Sydvaranger's open pit mine at Bjoernevatn, Kirkenes, Norway. Rock cores were collected for each of the tunnel response tests previous to drilling of the large diameter boreholes for bomb emplacements. The rock cores have been analyzed ... |
|
| Environmental Health & Safety Plan. Quality Program Plan, Part I. Galena Landfill Closure Galena, Alaska |
APR 1998 |
130 pages |
| Authors:
ADC/CLEARWATER JOINT VENTURE ANCHORAGE AK
|
| This Site-Specific Health and Safety Plan (SSHP) was prepared by the Ahtna/Clearwater Environmental Joint Venture (JV) for the Galena Landfill project. This plan will be used in conjunction with the Corporate Health and Safety Program, the Work Plan, the Project Sampling and Analysis Plan (SAP), the Quality Assurance Program Plan (QAPP) and various other submittals to guide its field personnel and contract laboratories in safe execution of activities associated with ... |
|
| Construction Productivity Advancement Research (CPAR) Program |
APR 1998 |
198 pages |
| Authors:
Kimberlie Staheli; David Bennett; Hugh W. O'Donnell; Timothy J. Hurley; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS GEOTECHNICAL LAB
|
| Early methods of installing pipelines and utilities across rivers and streams involved excavation of trenches. After the placement of the pipeline, the trenches were backfilled to protect the pipeline from hazards. These early dredged crossings were generally sited at the channel crossing of the thalweg between bends of the river. Here the river is generally a wide, shallow rectangle. This location is chosen due to its hydraulic stability and the ... |
|
| Analyses of Near-Field and Near-Regional Signals from the Black Thunder Mine |
FEB 1998 |
52 pages |
| Authors:
Terrance G. Barker; Keith L. McLaughlin; MAXWELL TECHNOLOGIES INC SAN DIEGO CA
|
| In this report we present analyses of seismic data recorded at the Black Thunder coal strip mine in the Powder River Basin of Wyoming. The data (collected by Stump et al, 1996) are a set of recordings at distances of a few kilometers from mining activity at that mine. Our objective was to determine whether these near-field data revealed features of quarry blasting that were ... |
|
| Oreshoot Zoning in the Carlin-Type Betze Orebody, Goldstrike Mine, Eureka County, Nevada |
1998 |
60 pages |
| Authors:
Stephen G. Peters; Gregory C. Ferdock; Maria B. Woltsekhowskaya; Robert Leonardson; Jerry Rahn; DEPARTMENT OF THE INTERIOR WASHINGTON DC
|
| Field and laboratory investigations of the giant Betze gold orebody, the largest Carlin-type deposit known, in the north-central Carlin trend, Nevada document that the orebody is composed of individual high-grade oreshoots that contain different geologic, mineralogic, and textural characteristics. The orebody is typical of many structurally controlled Carlin-type deposits, and is hosted in thin-bedded, impure carbonate or limy siltstone, breccia bodies, and intrusive or calc-silicate rock. Most ores in the ... |
|
| Regional Small-Event Identification Using Seismic Networks and Arrays |
09 DEC 1997 |
49 pages |
| Authors:
Michael A. Hedlin; SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA INST OF GEOPHYSICS AND PLANETARY PHYSICS
|
| This report reviews our AFTAC funded research over the last two years. The principal objective of our research was to investigate the utility of time varying spectral estimates obtained from regional seismic records for distinguishing mining events from single explosions and earthquakes. A second goal of this research program was the exploration of additional small-event discrimination techniques which might be merged with the time-frequency method. The emphasis was on acoustic ... |
|
| A Wavelet Analysis of Mining Explosions: Observations Relating to Verification of a Comprehensive Nuclear Test Ban |
17 NOV 97 |
34 pages |
| Authors:
Michael Hedlin; Delrdre Wendel; SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA INST OF GEOPHYSICS AND PLANETARY PHYSICS
|
| International nuclear testing threshold treaties, under effect in some form or another since 1983, have rallied scientists to devise ways of monitoring nuclear weapons tests. The UN General Assembly's adoption at a Comprehensive Test Ban Treaty in 1996 heightens the need to distinguish nuclear events not only from earthquakes, but also from man-made mining explosions. The treaty requires a monitoring threshold potentially as low as magnitude mg=2.5, which translates to ... |
|
| Application of the Hankel Transform Technique to the Analysis of TL3 leg 1 of the 1993 ACT II Data |
10 NOV 97 |
|
| Authors:
James Doutt; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
| An experiment was conducted near borehole 6010 off the New Jersey coast as part of the DARPA ACT II experiment in 1993. Several of the tow tracks of the sound source coincided with tracks from the 1988 Hudson Canyon experiment. For this experiment major differences from 1988 were the accuracy and sampling of the range data, the available sound source which dictated the use of pulses as opposed to CW, ... |
|
| Energy Security in a Time of Plenty |
OCT 1997 |
7 pages |
| Authors:
Patrick Clawson; NATIONAL DEFENSE UNIV WASHINGTON DC INST FOR NATIONAL STRATEGIC STUDIES
|
| Energy supply trends are good for Western security. Dependence on the volatile Persian Gulf may increase only slightly, as additional supplies come from stable pro-Western areas, such as Norway and Latin America. Also, the cost of producing oil is dropping thanks to the information revolution. In spite of East Asia's rapid growth, world oil demand is unlikely to grow each year by more than 1.5-2.0 million barrels per day (mbd). ... |
|
| Geophysical Investigation at Mustard Gas Burial Ground, Naval Surface Warfare Center, Crane Division, Crane, Indiana |
JUN 97 |
30 pages |
| Authors:
Jose L. Llopis; Keith J. Sjostrom; William L. Murphy; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS GEOTECHNICAL LAB
|
| A geophysical investigation was conducted at the Mustard Gas Burial Ground (MGBG) at the Naval Surface Warfare Center, Crane Division, Crane, IN. The MGBG, an approximately 2-acre area, is a former Solid Waste Management Unit. The objective of the investigation was to detect and delineate anomalies indicating the locations of buried structures, objects, or disturbed zones associated with past hazardous waste burial at the MGBG. The locations of these objects ... |
|
| Faulting of Gas-Hydrate-Bearing Marine Sediments - Contribution to Permeability |
MAY 1997 |
|
| Authors:
William Dillon; W. S. Holbrook; Rebecca Drury; Joseph Gettrust; Deborah Hutchinson; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS MARINE GEOSCIENCES DIV
|
| Extensive faulting is observed in sediments containing high concentrations of methane hydrate off the southeastern coast of the United States. Faults that break the sea floor show evidence of both extension and shortening; mud diapirs are also present. The zone of recent faulting apparently extends from the ocean floor down to the base of gas-hydrate stability. We infer that the faulting resulted from excess pore pressure in ... |
|
| MacDill Air Force Base: National Register Eligibility Recommendations for Sites 8HI50 and 8HI5656 |
FEB 97 |
217 pages |
| Authors:
Philip R. Gerrell; GEO-MARINE INC PLANO TX
|
| This report presents the results of archeological test excavations conducted at two prehistoric sites (8H150 and 8Hl5656) located within MacDill Air Force Base (AFB), Tampa, Florida. These investigations were conducted by Geo-Marine, Inc., under contract with the U.S. Army Corps of Engineers, Fort Worth District. The purpose of the investigations was to assess the eligibility of each site for inclusion in the National Register of Historic Places (NRHP). The excavation ... |
|
| Computational Modeling of Underground Tunnels in Intact and Jointed Rock |
JAN 97 |
59 pages |
| Authors:
Yvonne D. Murray; APTEK INC COLORADO SPRINGS CO
|
| Computational models were developed to predict the dynamic response and damage to reinforced tunnels in rock subjected to ground shock from nuclear weapons. This effort is part of the Underground Technology Program. The finite element calculations were performed with the DYNA3D code using a comprehensive smooth-cap model for intact rock and a nonlinear slideline model for rock joints. Calculated tunnel closures, and free-field stress and velocity histories, compare well with ... |
|
| Identifying and Separating from a Sequence of Mine Tremors Series of Events Generated by a Single Process |
SEP 96 |
254 pages |
| Authors:
Stanislaw Lasocki; ACADEMY OF MINING AND METALLURGY KRAKOW (POLAND)
|
| Generation of induced seismicity in underground mines is controlled by various local and mine wide factors, and the seismic series are usually composed of events of different origins. Although it is well known that seismicity in mines is a multimodal phenomenon, it is not easy to identify its various components. A set of statistical methods to study complexity of seismic series is proposed. These are the descriptive statistics analysis to ... |
|
| Micro-local, Non-linear, Resolution Analysis of Generalised Radon Transform Inversions in Anisotropic Media |
JUL 96 |
30 pages |
| Authors:
Maarten V. De Hoop; Norman Bleistein; COLORADO SCHOOL OF MINES GOLDEN CENTER FOR WAVE PHENOMENA
|
| The resolution analysis of generalized Radon Transform (GRT) inversion of seismic data is carried out in general anisotropic media. The GRT inversion formula is derived from the ray-Born approximation of the wave field for volume scatterers. However, by considering scattering surfaces in the resolution analysis, rather than parameter perturbations, we show that the inversion provides a reflectivity map and reflection/transmission coefficients as functions of scattering angles and azimuths. Those coefficients ... |
|
| Decision Maker's Guide to Issues Effecting Post-Closure Reutilization of Municiple Solid Waste Landfills |
96 |
97 pages |
| Authors:
Robert W. Ganowski; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Municipal solid waste landfills serve as society's primary waste handling mechanism and have promising potential to continue as a community asset well after their capacity has been reached. This guide aims to familiarize the reader with landfills and the issues that can effect their potential after closure. Landfills have evolved into technologically advanced facilities that are designed, constructed, and operated with strict environmental controls. When a landfill reaches capacity, it ... |
|
| Source Parameters and Source Mechanism of Seismic Events Occurring in Sequences at a Polish Copper Mine and South African Gold Mine: Search for Possible Time Variations |
15 NOV 95 |
185 pages |
| Authors:
Slavomir J. Gibowicz; B. Domanski; P. Wiejacz; POLISH ACADEMY OF SCIENCES WARSAW INSTOF GEOPHYSICS
|
| This report results from a contract tasking Polish Academy of Sciences as follows: Investigate the swarm-like behavior of seismic events from Polish and South African mines. The investigation conducted under this contract is focused on a search for possible time variations of source parameters and mechanism of seismic events occurring in sequences at Polkowice copper mine in Poland and Western Deep Levels (WDL) gold mine in South Africa. The results ... |
|
| Proceedings of the Annual Seismic Research Symposium on Monitoring a Comprehensive Test Ban Treaty (17th) Held in Scottsdale, Arizona on 12-15 September, 1995 |
14 AUG 95 |
1071 pages |
| Authors:
James F. Lewkowicz; Jeanne M. McPhetres; Delaine T. Reiter; PHILLIPS LAB HANSCOM AFB MA
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| Limitation Code: APPROVED FOR PUBLIC RELEASE DOCUMENT PARTIALLY ILLEGIBLE |
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| Monitoring Research in the Context of CTBT Negotiations and Networks, |
14 AUG 1995 |
5 pages |
| Authors:
Robert Blandford; AIR FORCE TECHNICAL APPLICATIONS CENTER PATRICK AFB FL
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| Since the last Phillips Laboratory conference there has been substantial progress at the Geneva Negotiations in the United Nations Conference on Disarmament on the subject of which types of detecting networks will be implemented as part of an international monitoring system (IMS), used to monitor a CTBT. At the present time the United States is supporting the deployment of 4 networks, seismic, radio nuclide, hydroacoustic, and infrasonic. In addition the ... |
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| Discrimination of Earthquakes, Explosions, and Mining Tremors Using the Empirical Green's Function Method, |
14 AUG 1995 |
10 pages |
| Authors:
Y. Li; W. Rodi; M. N. Toksoez; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF EARTH ATMOSPHERIC AND PLANETARY SCIENCES
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| Using the empirical Green's function (EGF) method, we have estimated source time functions for earthquakes, industrial blasts, nuclear explosions, and mining tremors covering the magnitude range 0.9 - 6.6. The results show that, for events with magnitudes less than 2.5 or greater than 4.5, the time duration of the source time function can discriminate earthquakes from explosions. For large magnitude events source duration is longer for earthquakes than explosions, but ... |
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Mining Engineering
