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1

Mineral Test Hole Regulatory Act (Tennessee) | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Mineral Test Hole Regulatory Act (Tennessee) Mineral Test Hole Regulatory Act (Tennessee) Mineral Test Hole Regulatory Act (Tennessee) < Back Eligibility Commercial Construction Developer Fuel Distributor Industrial Installer/Contractor Investor-Owned Utility Municipal/Public Utility Utility Program Info State Tennessee Program Type Environmental Regulations Siting and Permitting Provider Tennessee Department Of Environment and Conservation The Mineral Hole Regulatory Act is applicable to any person (individual, corporation, company, association, joint venture, partnership, receiver, trustee, guardian, executor, administrator, personal representative or private organization of any kind) who wishes to drill a mineral test hole (any hole in excess of one hundred (100) feet drilled during the exploration for minerals but shall exclude auger drilling in surficial or

2

Overspinning a Black Hole with a Test Body  

Science Journals Connector (OSTI)

It has long been known that a maximally spinning black hole cannot be overspun by tossing in a test body. Here we show that if instead the black hole starts out with below maximal spin, then indeed overspinning can be achieved. We find that requirements on the size and internal structure of the test body can be met if the body carries in orbital but not spin angular momentum. Our analysis neglects radiative and self-force effects, which may prevent the overspinning.

Ted Jacobson and Thomas P. Sotiriou

2009-09-28T23:59:59.000Z

3

Final Report Limited Soil Investigation of Project Chariot Test Holes  

Office of Legacy Management (LM)

Limited Soil Investigation of Project Limited Soil Investigation of Project Chariot Test Holes Cape Thompson, Alaska December 2010 Prepared for U.S. Department of Energy and U.S. Army Corps of Engineers, Alaska District Post Office Box 6898 Elmendorf AFB, Alaska 99506-6898 Contract W911KB-08-D-0003 Task Order 12, Mod 001 Prepared by Fairbanks Environmental Services 3538 International Street Fairbanks, Alaska 99701 (907) 452-1006 FES Project No. 5012-06 Final Report Limited Soil Investigation of Project Chariot Test Holes, Cape Thompson, Alaska Fairbanks Environmental Services 5012-06 TABLE OF CONTENTS Page Number EXECUTIVE SUMMARY 1.0 INTRODUCTION ................................................................................................... 1-1

4

Minerals  

Science Journals Connector (OSTI)

This article presents a short review of the physical, chemical, and crystallographic properties of cave minerals. In addition, their general modes of occurrence and genesis under various cave settings are discussed. To suit the needs of any particular reader, nearly 30 of the most common cave mineral species are described, providing the necessary backdrop for everyone eager to know more about cave mineralogy. Keywords cave minerals; speleothems; karst

Bogdan P. Onac

2012-01-01T23:59:59.000Z

5

Geology of Geothermal Test Hole GT-2 Fenton Hill Site, July 1974...  

Open Energy Info (EERE)

Test Hole GT-2 Fenton Hill Site, July 1974 Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Geology of Geothermal Test Hole GT-2 Fenton Hill Site, July...

6

Solar System tests of Ho?ava-Lifshitz black holes  

E-Print Network [OSTI]

In the present paper we consider the possibility of observationally testing Horava gravity at the scale of the Solar System, by considering the classical tests of general relativity (perihelion precession of the planet Mercury, deflection of light by the Sun and the radar echo delay) for the Kehagias-Sfetsos asymptotically flat black hole solution of Horava-Lifshitz gravity. All these gravitational effects can be fully explained in the framework of the vacuum solution of Horava gravity, and it is shown that the analysis of the classical general relativistic tests severely constrain the free parameter of the solution.

Francisco S. N. Lobo; Tiberiu Harko; Zoltán Kovács

2010-01-20T23:59:59.000Z

7

Core Hole Drilling And Testing At The Lake City, California Geothermal  

Open Energy Info (EERE)

Hole Drilling And Testing At The Lake City, California Geothermal Hole Drilling And Testing At The Lake City, California Geothermal Field Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Core Hole Drilling And Testing At The Lake City, California Geothermal Field Details Activities (4) Areas (1) Regions (0) Abstract: Unavailable Author(s): Dick Benoit, Joe Moore, Colin Goranson, David Blackwell Published: GRC, 2005 Document Number: Unavailable DOI: Unavailable Core Analysis At Lake City Hot Springs Area (Benoit Et Al., 2005) Core Holes At Lake City Hot Springs Area (Benoit Et Al., 2005) Flow Test At Lake City Hot Springs Area (Benoit Et Al., 2005) Static Temperature Survey At Lake City Hot Springs Area (Benoit Et Al., 2005) Lake City Hot Springs Geothermal Area Retrieved from "http://en.openei.org/w/index.php?title=Core_Hole_Drilling_And_Testing_At_The_Lake_City,_California_Geothermal_Field&oldid=389996

8

Application of the Modified Methylene Blue Test to Detect Clay Minerals in Coarse Aggregate Fines  

E-Print Network [OSTI]

APPLICATION OF THE MODIFIED METHYLENE BLUE TEST TO DETECT CLAY MINERALS IN COARSE AGGREGATE FINES A Thesis by BRANDON THOMAS PITRE Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment...: Civil Engineering Copyright 2012 Brandon Thomas Pitre ii ABSTRACT The purpose of this study was to implement a new, rapid field method to effectively and accurately detect harmful clay minerals in aggregate fines by using the modified...

Pitre, Brandon

2012-12-04T23:59:59.000Z

9

Testing operations plan: Coso Geothermal Exploratory Hole No. 1 (CGEH-1) |  

Open Energy Info (EERE)

operations plan: Coso Geothermal Exploratory Hole No. 1 (CGEH-1) operations plan: Coso Geothermal Exploratory Hole No. 1 (CGEH-1) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Testing operations plan: Coso Geothermal Exploratory Hole No. 1 (CGEH-1) Details Activities (1) Areas (1) Regions (0) Abstract: Coso Geothermal Exploratory Hole No. 1 (CGEH-1) was drilled to investigate the potential of the Coso Hot Springs Known Geothermal Resource Area (KGRA) in southeastern California. Detailed background information is contained in the drilling plan, Coso Geothermal Exploratory Hole No. 1 (CGEH-1), NVO-184, dated June 1977. The purpose of this supplement to NVO-184 is to establish a plan of operations for testing the resource after completion of well drilling activities. Major elements of this plan include

10

Asymptotic Analysis of Cross-Hole Hydraulic Tests in Fractured Granite  

E-Print Network [OSTI]

Asymptotic Analysis of Cross-Hole Hydraulic Tests in Fractured Granite by Walter A. Illman1 hydraulic conductivity and specific storage. Introduction Well test analyses in porous and fractured for the interpretation of three-dimensional pneumatic well tests conducted in porous or fractured geologic media, which

Daniels, Jeffrey J.

11

MINERALIZATION OF RADIOACTIVE WASTES BY FLUIDIZED BED STEAM REFORMING (FBSR): COMPARISONS TO VITREOUS WASTE FORMS, AND PERTINENT DURABILITY TESTING  

SciTech Connect (OSTI)

The Savannah River National Laboratory (SRNL) was requested to generate a document for the Washington State Department of Ecology and the U.S. Environmental Protection Agency that would cover the following topics: (1) A description of the mineral structures produced by Fluidized Bed Steam Reforming (FBSR) of Hanford type Low Activity Waste (LAW including LAWR which is LAW melter recycle waste) waste, especially the cage structured minerals and how they are formed. (2) How the cage structured minerals contain some contaminants, while others become part of the mineral structure (Note that all contaminants become part of the mineral structure and this will be described in the subsequent sections of this report). (3) Possible contaminant release mechanisms from the mineral structures. (4) Appropriate analyses to evaluate these release mechanisms. (5) Why the appropriate analyses are comparable to the existing Hanford glass dataset. In order to discuss the mineral structures and how they bond contaminants a brief description of the structures of both mineral (ceramic) and vitreous waste forms will be given to show their similarities. By demonstrating the similarities of mineral and vitreous waste forms on atomic level, the contaminant release mechanisms of the crystalline (mineral) and amorphous (glass) waste forms can be compared. This will then logically lead to the discussion of why many of the analyses used to evaluate vitreous waste forms and glass-ceramics (also known as glass composite materials) are appropriate for determining the release mechanisms of LAW/LAWR mineral waste forms and how the durability data on LAW/LAWR mineral waste forms relate to the durability data for LAW/LAWR glasses. The text will discuss the LAW mineral waste form made by FBSR. The nanoscale mechanism by which the minerals form will be also be described in the text. The appropriate analyses to evaluate contaminant release mechanisms will be discussed, as will the FBSR test results to date and how they compare to testing performed on LAW glasses. Other details about vitreous waste form durability and impacts of REDuction/OXidation (REDOX) on durability are given in Appendix A. Details about the FBSR process, various pilot scale demonstrations, and applications are given in Appendix B. Details describing all the different leach tests that need to be used jointly to determine the leaching mechanisms of a waste form are given in Appendix C. Cautions regarding the way in which the waste form surface area is measured and in the choice of leachant buffers (if used) are given in Appendix D.

Jantzen, C

2008-12-26T23:59:59.000Z

12

X-ray Probes of Black Hole Accretion Disks for Testing the No-Hair Theorem  

E-Print Network [OSTI]

The spins of a number of supermassive and stellar-mass black holes have been measured based on detections of thermal continuum emission and relativistically broadened iron lines in their x-ray spectra. Likewise, quasiperiodic variability has been observed in several sources. Such measurements commonly make the assumption that black holes are described by the Kerr metric, which according to the no-hair theorem characterizes black holes uniquely in terms of their masses and spins. This fundamental property of black holes can be tested observationally by measuring potential deviations from the Kerr metric introduced by a parametrically deformed Kerr-like spacetime. Thermal spectra, iron lines, and variability have already been studied extensively in several such metrics, which usually depend on only one particular type of deviation or contain unphysical regions outside of the compact object. In this paper, I study these x-ray probes in the background of a new Kerr-like metric which depends on four independent deviation functions and is free of pathological regions outside of the event horizon. I show that the observed signals depend significantly on primarily two types of deviations and that the strong correlation between the spin and the deviation parameters found previously in other Kerr-like metrics is partially broken for rapidly spinning black holes. This suggests that high-spin sources are the best candidates for tests of the no-hair theorem with x-rays and I obtain first constraints on such deviations from the stellar-mass black hole Cygnus X-1.

Tim Johannsen

2015-01-12T23:59:59.000Z

13

X-ray Probes of Black Hole Accretion Disks for Testing the No-Hair Theorem  

E-Print Network [OSTI]

The spins of a number of supermassive and stellar-mass black holes have been measured based on detections of thermal continuum emission and relativistically broadened iron lines in their x-ray spectra. Likewise, quasiperiodic variability has been observed in several sources. Such measurements commonly make the assumption that black holes are described by the Kerr metric, which according to the no-hair theorem characterizes black holes uniquely in terms of their masses and spins. This fundamental property of black holes can be tested observationally by measuring potential deviations from the Kerr metric introduced by a parametrically deformed Kerr-like spacetime. Thermal spectra, iron lines, and variability have already been studied extensively in several such metrics, which usually depend on only one particular type of deviation or contain unphysical regions outside of the compact object. In this paper, I study these x-ray probes in the background of a new Kerr-like metric which depends on four independent de...

Johannsen, Tim

2015-01-01T23:59:59.000Z

14

Geopressured-geothermal testing of five dry holes during 1980 and 1981  

SciTech Connect (OSTI)

This paper summarizes the testing of five hot, geopressured aquifers in different geologic environments in Texas and Louisiana by Eaton Operating Company for the US Department of Energy. The results were encouraging. Natural gas-to-brine content ranged from 33.0 to 55.0 SCF/bbl. Gas production rates ranged from 93 to 600 MCFD. Sustained water production rates ranged from 1950 to 15,000 BWPD. Bottom-hole temperatures ranged from 260 to 327/sup 0/F. Reservoir pressures ranged from 6627 psia to 13,203 psia. A test near Beaumont resulted in discovery of oil and gas.

Klauzinski, R.Z.

1981-01-01T23:59:59.000Z

15

Classical Tests of General Relativity: Probing Topologically Charged Black Holes on Brane Worlds in f(R) Bulk  

E-Print Network [OSTI]

The perihelion precession, the deflection of light, and the radar echo delay are classical tests of General Relativity here used to probe brane world topologically charged black holes in a f(R) bulk and to constrain the parameter that arises from the Shiromizu-Maeda-Sasaki procedure applied to a f(R) bulk as well. The existing Solar system observational data constrain the possible values of the tidal charge parameter and the effective cosmological constant including f(R) brane world effects. We show that the observational/experimental data for both perihelion precession and radar echo delay make the black hole space of parameters to be more strict than the ones for the Dadhich, Maartens, Papadopoulos and Rezania (DMPR) black hole geometry. Furthermore, the deflection of light constrains the tidal charge parameter similarly as the DMPR black holes due to a peculiarity in the equation of motion.

Roldao da Rocha; A. M. Kuerten

2014-07-08T23:59:59.000Z

16

Geologic and hydrologic records of observation wells, test holes, test wells, supply wells, springs, and surface water stations in the Los Alamos area  

SciTech Connect (OSTI)

Hundreds of holes have been drilled into the Pajarito Plateau and surrounding test areas of the Los Alamos National Laboratory since the end of World War II. They range in depth from a few feet to more than 14,000 ft. The holes were drilled to provide geologic, hydrologic, and engineering information related to development of a water supply, to provide data on the likelihood or presence of subsurface contamination from hazardous and nuclear materials, and for engineering design for construction. The data contained in this report provide a basis for further investigations into the consequences of our past, present, and future interactions with the environment.

Purtymun, W.D.

1995-01-01T23:59:59.000Z

17

Batch Test for Assessing the Mineralization of 14C-Radiolabeled Compounds under Realistic Anaerobic Conditions  

Science Journals Connector (OSTI)

Environmentally realistic concentrations of test chemicals were incubated with anaerobic digester sludge in sealed vessels at 35 °C. ... Major anoxic environments include anaerobic digesters, septic tanks, organically enriched sediments, flooded soils, and landfills. ... Another rolled piece of copper screen was inserted into this end, and a pea-size piece of quartz wool was inserted into both ends. ...

Barbara A. Nuck; Thomas W. Federle

1996-11-27T23:59:59.000Z

18

Microcracks, residual strain, velocity, and elastic properties of igneous rocks from a geothermal test-hole at Fenton Hill, New Mexico  

E-Print Network [OSTI]

MICROCRACKS, RESIDUAL STRAIN, VELOCITY, AND ELASTIC PROPERTIES OF IGNEOUS ROCKS FRCM A GEOTHERMAL TEST-HOLE AT FENTON HILL, NEW MEXICO A Thesis JOHN DAVID CIAMPA Submitted to the Graduate College of Texas A8M University in partial fulfillment... of the requirement for the degree of MASTER OF SCIENCE August 1980 Major Subject: Geophysics MICROCRACKS, RESIDUAL STRAIN, VELOCITY, AND ELASTIC PROPERTIES OF IGNEOUS ROCKS FROM A GEOTHERMAL TEST-HOLE AT FENTON HILL, NEW MEXICO A Thesis by JOHN DAVID CIAMPA...

Ciampa, John David

2012-06-07T23:59:59.000Z

19

TESTING COWLING'S ANTIDYNAMO THEOREM NEAR A ROTATING BLACK HOLE AXEL BRANDENBURG1  

E-Print Network [OSTI]

hole. In the cases investigated it is found that a magnetic field cannot be sustained against ohmic-excited axisymmetric solutions. In practice, therefore, Cowling's antidynamo theorem may still hold in Kerr geometry of processes depicted above, only changes in the azimuthal electric and magnetic fields by stretching

Brandenburg, Axel

20

Core Holes | Open Energy Information  

Open Energy Info (EERE)

Core Holes Core Holes Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Core Holes Details Activities (8) Areas (7) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Drilling Techniques Exploration Sub Group: Exploration Drilling Parent Exploration Technique: Exploration Drilling Information Provided by Technique Lithology: Core holes are drilled to identify lithology and mineralization Stratigraphic/Structural: Retrieved samples can be used to identify fracture networks or faults Hydrological: Thermal: Thermal conductivity measurements can be done on retrieved samples. Dictionary.png Core Holes: A core hole is a well that is drilled using a hallow drill bit coated with synthetic diamonds for the purposes of extracting whole rock samples from

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Virial tests for post-Newtonian stationary black-hole-disk systems  

E-Print Network [OSTI]

We investigated hydrodynamical post-Newtonian models of selfgravitating stationary black-hole-disk systems. The post-Newtonian scheme presented here and also in our recent paper is a continuation of previous, purely Newtonian studies of selfgravitating hydrodynamical disks rotating according to the Keplerian rotation law. The post-Newtonian relativistic corrections are significant even at the 1PN level. The 1PN correction to the angular velocity can be of the order of 10% of its Newtonian value. It can be expressed as a combination of geometric and hydrodynamical terms. Moreover, in contrast to the Newtonian Poincare-Wavre theorem, it depends both on the distance from the rotation axis and the distance from the equatorial plane.

Jaranowski, Piotr; Malec, Edward; Pirog, Michal

2015-01-01T23:59:59.000Z

22

Corrective Action Investigation Plan for Corrective Action Unit 145: Wells and Storage Holes, Nevada Test Site, Nevada, Rev. No.: 0  

SciTech Connect (OSTI)

This Corrective Action Investigation Plan (CAIP) contains project-specific information for conducting site investigation activities at Corrective Action Unit (CAU) 145: Wells and Storage Holes. Information presented in this CAIP includes facility descriptions, environmental sample collection objectives, and criteria for the selection and evaluation of environmental samples. Corrective Action Unit 145 is located in Area 3 of the Nevada Test Site, which is 65 miles northwest of Las Vegas, Nevada. Corrective Action Unit 145 is comprised of the six Corrective Action Sites (CASs) listed below: (1) 03-20-01, Core Storage Holes; (2) 03-20-02, Decon Pad and Sump; (3) 03-20-04, Injection Wells; (4) 03-20-08, Injection Well; (5) 03-25-01, Oil Spills; and (6) 03-99-13, Drain and Injection Well. These sites are being investigated because existing information on the nature and extent of potential contamination is insufficient to evaluate and recommend corrective action alternatives. Additional information will be obtained by conducting a corrective action investigation (CAI) prior to evaluating corrective action alternatives and selecting the appropriate corrective action for each CAS. The results of the field investigation will support a defensible evaluation of viable corrective action alternatives that will be presented in the Corrective Action Decision Document. One conceptual site model with three release scenario components was developed for the six CASs to address all releases associated with the site. The sites will be investigated based on data quality objectives (DQOs) developed on June 24, 2004, by representatives of the Nevada Division of Environmental Protection; U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office; Stoller-Navarro Joint Venture; and Bechtel Nevada. The DQOs process was used to identify and define the type, amount, and quality of data needed to develop and evaluate appropriate corrective actions for CAU 145.

David A. Strand

2004-09-01T23:59:59.000Z

23

EMSL - minerals  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

minerals en Physical Properties of Ambient and Laboratory-Generated Secondary Organic Aerosol. http:www.emsl.pnl.govemslwebpublicationsphysical-properties-ambient-and-laborato...

24

Secondary minerals  

Science Journals Connector (OSTI)

Th e various processes acting upon ore assemblages in the near surface environment result in the formation of new minerals either via replacement or precipitation. Within this context these are referred to as ...

Roger Taylor

2011-01-01T23:59:59.000Z

25

Soil Minerals  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Soil Minerals Soil Minerals Nature Bulletin No. 707 March 2, 1963 Forest Preserve District of Cook County Seymour Simon, President Roberts Mann, Conservation Editor SOIL MINERALS We all depend upon the land Our food is obtained from plants and animals -- bread and meat, potatoes and fish, fruit and eggs and milk and the rest of it. Our livestock feed on plants and plant products such as grass and grain. Plants, by means of their root systems, take moisture and nutrients from the soils on which they grow. Their food values, for us or for animals that furnish us food, depend upon the available nutrients in those soils. Soils contain solids, water and air. The solids, the bulk of a soil -- except in purely organic types such as peat and muck -- are mostly mineral materials. Ordinarily they also contain some organic material: decayed and decaying remains of plants and animals.

26

Predictions of tracer transport in interwell tracer tests at the C-Hole complex. Yucca Mountain site characterization project report milestone 4077  

SciTech Connect (OSTI)

This report presents predictions of tracer transport in interwell tracer tests that are to be conducted at the C-Hole complex at the Nevada Test Site on behalf of the Yucca Mountain Site Characterization Project. The predictions are used to make specific recommendations about the manner in which the tracer test should be conducted to best satisfy the needs of the Project. The objective of he tracer tests is to study flow and species transport under saturated conditions in the fractured tuffs near Yucca Mountain, Nevada, the site of a potential high-level nuclear waste repository. The potential repository will be located in the unsaturated zone within Yucca Mountain. The saturated zone beneath and around the mountain represents the final barrier to transport to the accessible environment that radionuclides will encounter if they breach the engineered barriers within the repository and the barriers to flow and transport provided by the unsaturated zone. Background information on the C-Holes is provided in Section 1.1, and the planned tracer testing program is discussed in Section 1.2.

Reimus, P.W.

1996-09-01T23:59:59.000Z

27

Developing the ability to model acid-rock interactions and mineral dissolution during the RMA stimulation test performed at the Soultz-sous-Forêts EGS site, France  

Science Journals Connector (OSTI)

The Soultz Enhanced Geothermal System (EGS) reservoir's response to chemical stimulation is assessed by numerical simulation of coupled thermo-hydraulic-chemical processes. To assess chemical interactions between host rocks and a mixture of \\{HCl\\} and HF as well as its potential effects on the Soultz EGS reservoir, new modelling efforts using the FRACHEM code have been initiated. This article presents the model calibration and results. Simulations consider realistic conditions with available data sets from the EGS system at Soultz. Results indicate that the predicted amount of fracture sealing minerals dissolved by injection of a mixture of acids Regular Mud Acid (RMA) was consistent with the estimated amount from the test performed on GPK4 well at Soultz EGS site. Consequently reservoir porosity and permeability can be enhanced especially near the injection well by acidizing treatment.

Sandrine Portier; François D. Vuataz

2010-01-01T23:59:59.000Z

28

The antikick strikes back: recoil velocities for nearly-extremal binary black hole mergers in the test-mass limit  

E-Print Network [OSTI]

Gravitational waves emitted from a generic binary black-hole merger carry away linear momentum anisotropically, resulting in a gravitational recoil, or "kick", of the center of mass. For certain merger configurations the time evolution of the magnitude of the kick velocity has a local maximum followed by a sudden drop. Perturbative studies of this "antikick" in a limited range of black hole spins have found that the antikick decreases for retrograde orbits as a function of negative spin. We analyze this problem using a recently developed code to evolve gravitational perturbations from a point-particle in Kerr spacetime driven by an effective-one-body resummed radiation reaction force at linear order in the mass ratio $\

Alessandro Nagar; Enno Harms; Sebastiano Bernuzzi; An?l Zengino?lu

2014-07-18T23:59:59.000Z

29

Near-infrared polarimetry as a tool for testing properties of accreting super-massive black holes  

E-Print Network [OSTI]

Several massive black holes exhibit flux variability on time scales that correspond to source sizes of the order of few Schwarzschild radii. We survey the potential of near-infrared and X-ray polarimetry to constrain physical properties of such black hole systems, namely their spin and inclination. We have focused on a model where an orbiting hot spot is embedded in an accretion disk. A new method of searching for the time-lag between orthogonal polarization channels is developed and applied to an ensemble of hot spot models that samples a wide range of parameter space. We found that the hot spot model predicts signatures in polarized light which are in the range to be measured directly in the near future. However, our estimations are predicted upon the assumption of a Keplerian velocity distribution inside the flow where the dominant part of the magnetic field is toroidal. We also found that if the right model of the accretion flow can be chosen for each source (e.g. on the basis of magnetohydrodynamics simulations) then the black hole spin and inclination can be constrained to a small two-dimensional area in the spin-inclination space. The results of the application of the method to the available near-infrared polarimetric data of Sagittarius A* (Sgr A*) is presented. It is shown that even with the currently available data the spin and inclination of Sgr A* can be constrained. Next generations of near-infrared and X-ray polarimeters should be able to exploit this tool.

M. Zamaninasab; A. Eckart; M. Dovciak; V. Karas; R. Schoedel; G. Witzel; N. Sabha; M. Garcia-Marin; D. Kunneriath; K. Muzic; C. Straubmeier; M. Valencia-S; J. A. Zensus

2011-02-03T23:59:59.000Z

30

Studies of strong-field gravity : testing the black hole hypothesis and investigating spin-curvature coupling  

E-Print Network [OSTI]

Observations of gravitational systems agree well with the predictions of general relativity (GR); however, to date we have only tested gravity in the weak-field limit. In the next few years, observational advances may make ...

Vigeland, Sarah Jane

2012-01-01T23:59:59.000Z

31

White holes and eternal black holes  

E-Print Network [OSTI]

We investigate isolated white holes surrounded by vacuum, which correspond to the time reversal of eternal black holes that do not evaporate. We show that isolated white holes produce quasi- thermal Hawking radiation. The time reversal of this radiation, incident on a black hole precursor, constitutes a special preparation that will cause the black hole to become eternal.

Stephen D. H. Hsu

2011-11-16T23:59:59.000Z

32

Corrective Action Decision Document for Corrective Action Unit 145: Wells and Storage Holes, Nevada Test Site, Nevada, Rev. No.: 0, with ROTC No. 1 and Addendum  

SciTech Connect (OSTI)

This Corrective Action Decision Document has been prepared for Corrective Action Unit (CAU) 145, Wells and Storage Holes in Area 3 of the Nevada Test Site, Nevada, in accordance with the ''Federal Facility Agreement and Consent Order'' (1996). Corrective Action Unit 145 is comprised of the following corrective action sites (CASs): (1) 03-20-01, Core Storage Holes; (2) 03-20-02, Decon Pad and Sump; (3) 03-20-04, Injection Wells; (4) 03-20-08, Injection Well; (5) 03-25-01, Oil Spills; and (6) 03-99-13, Drain and Injection Well. The purpose of this Corrective Action Decision Document is to identify and provide the rationale for the recommendation of a corrective action alternative for the six CASs within CAU 145. Corrective action investigation activities were performed from August 1, 2005, through November 8, 2005, as set forth in the CAU 145 Corrective Action Investigation Plan and Record of Technical Change No. 1. Analytes detected during the Corrective Action Investigation (CAI) were evaluated against appropriate final action levels to identify the contaminants of concern for each CAS. The results of the CAI identified contaminants of concern at one of the six CASs in CAU 145 and required the evaluation of corrective action alternatives. Assessment of the data generated from investigation activities conducted at CAU 145 revealed the following: CASs 03-20-01, 03-20-02, 03-20-04, 03-20-08, and 03-99-13 do not contain contamination; and CAS 03-25-01 has pentachlorophenol and arsenic contamination in the subsurface soils. Based on the evaluation of analytical data from the CAI, review of future and current operations at the six CASs, and the detailed and comparative analysis of the potential corrective action alternatives, the following corrective actions are recommended for CAU 145. No further action is the preferred corrective action for CASs 03-20-01, 03-20-02, 03-20-04, 03-20-08, and 03-99-13. Close in place is the preferred corrective action for CAS 03-25-01. The preferred corrective action alternatives were evaluated on technical merit focusing on performance, reliability, feasibility, safety, and cost. The alternatives were judged to meet all requirements for the technical components evaluated. The alternatives meet all applicable federal and state regulations for closure of the site and will reduce potential exposure pathways to the contaminated media to an acceptable level at CAU 145.

David Strand

2006-04-01T23:59:59.000Z

33

Collecting Fluorescent Minerals  

Science Journals Connector (OSTI)

Good fluorescent mineral collections are the result of constant study and diligent search for superior material. As in the development of mineral collections generally, purchase and trade provide rewarding ave...

Manuel Robbins

1983-01-01T23:59:59.000Z

34

Oxygen And Carbon Isotope Ratios Of Hydrothermal Minerals From Yellowstone  

Open Energy Info (EERE)

Oxygen And Carbon Isotope Ratios Of Hydrothermal Minerals From Yellowstone Oxygen And Carbon Isotope Ratios Of Hydrothermal Minerals From Yellowstone Drill Cores Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Oxygen And Carbon Isotope Ratios Of Hydrothermal Minerals From Yellowstone Drill Cores Details Activities (3) Areas (1) Regions (0) Abstract: Oxygen and carbon isotope ratios were measured for hydrothermal minerals (silica, clay and calcite) from fractures and vugs in altered rhyolite, located between 28 and 129 m below surface (in situ temperatures ranging from 81 to 199°C) in Yellowstone drill holes. The purpose of this study was to investigate the mechanism of formation of these minerals. The Δ18O values of the thirty-two analyzed silica samples (quartz, chalcedony, α-cristobalite, and β-cristobalite) range from -7.5 to +2.8‰. About one

35

Isotope Geochemistry Of Minerals And Fluids From Newberry Volcano, Oregon |  

Open Energy Info (EERE)

Isotope Geochemistry Of Minerals And Fluids From Newberry Volcano, Oregon Isotope Geochemistry Of Minerals And Fluids From Newberry Volcano, Oregon Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Isotope Geochemistry Of Minerals And Fluids From Newberry Volcano, Oregon Details Activities (2) Areas (1) Regions (0) Abstract: Isotopic compositions were determined for hydrothermal quartz, calcite, and siderite from core samples of the Newberry 2 drill hole, Oregon. The Δ15O values for these minerals decrease with increasing temperatures. The values indicate that these hydrothermal minerals precipitated in isotopic equilibrium with water currently present in the reservoirs. The Δ18O values of quartz and calcite from the andesite and basalt flows (700-932 m) have isotopic values which require that the equilibrated water Δ18O values increase slightly (- 11.3 to -9.2‰) with

36

Energy on black hole spacetimes  

E-Print Network [OSTI]

We consider the issue of defining energy for test particles on a background black hole spacetime. We revisit the different notions of energy as defined by different observers. The existence of a time-like isometry allows for the notion of a total conserved energy to be well defined, and subsequently the notion of a gravitational potential energy is also meaningful. We then consider the situation in which the test particle is adsorbed by the black hole, and analyze the energetics in detail. In particular, we show that the notion of horizon energy es defined by the isolated horizons formalism provides a satisfactory notion of energy compatible with the particle's conserved energy. As another example, we comment a recent proposal to define energy of the black hole as seen by an observer at rest. This account is intended to be pedagogical and is aimed at the level of and as a complement to the standard textbooks on the subject.

Alejandro Corichi

2012-07-18T23:59:59.000Z

37

Relations Of Ammonium Minerals At Several Hydrothermal Systems In The  

Open Energy Info (EERE)

Relations Of Ammonium Minerals At Several Hydrothermal Systems In The Relations Of Ammonium Minerals At Several Hydrothermal Systems In The Western Us Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Relations Of Ammonium Minerals At Several Hydrothermal Systems In The Western Us Details Activities (5) Areas (1) Regions (0) Abstract: Ammonium bound to silicate and sulfate minerals has recently been located at several major hydrothermal systems in the western U.S. utilizing newly-discovered near-infrared spectral properties. Knowledge of the origin and mineralogic relations of ammonium minerals at known hydrothermal systems is critical for the proper interpretation of remote sensing data and for testing of possible links to mineralization. Submicroscopic analysis of ammonium minerals from two mercury- and gold-bearing

38

Particles and scalar waves in noncommutative charged black hole spacetime  

E-Print Network [OSTI]

In this paper we have discussed geodesics and the motion of test particle in the gravitational field of noncommutative charged black hole spacetime. The motion of massive and massless particle have been discussed seperately. A comparative study of noncommutative charged black hole and usual Reissner-Nordstrom black hole has been done. The study of effective potential has also been included. Finally, we have examined the scattering of scalar waves in noncommutative charged black hole spacetime.

Bhar, Piyali; Biswas, Ritabrata; Mondal, U F

2015-01-01T23:59:59.000Z

39

Black Hole Horizons and Black Hole Thermodynamics.  

E-Print Network [OSTI]

??This work investigates how black holes can be described in terms of different definitions of horizons. Global definitions in terms of event horizons and Killing… (more)

Nielsen, Alex

2007-01-01T23:59:59.000Z

40

Fran Ridge horizontal coring summary report hole UE-25h No. 1, Yucca Mountain Area, Nye County, Nevada  

SciTech Connect (OSTI)

Hole UE-25h No. 1 was core drilled during December 1982 and January 1983 within several degrees of due west, 400 ft horizontally into the southeast slope of Fran Ridge at an altitude of 3409 ft. The purpose of the hole was to obtain data pertinent for radionuclide transport studies in the Topopah Spring Member of the Paintbrush Tuff. This unit had been selected previously as the host rock for the potential underground nuclear waste repository at Yucca Mountain, adjacent to the southwestern part of the Nevada Test Site. The hole was core drilled first with air, then with air mist, and finally with air, soap, and water. Many problems were encountered, including sloughing of tuff into the uncased hole, vibration of the drill rods, high rates of bit wear, and lost circulation of drilling fluids. On the basis of experience gained in drilling this hole, ways to improve horizontal coring with air are suggested in this report. All of the recovered core, except those pieces that were wrapped and waxed, were examined for lithophysal content, for fractures, and for fracture-fill mineralization. The results of this examination are given in this report. Core recovery greater than 80% at between 209 and 388 ft permitted a fracture frequency analysis. The results are similar to the fracture frequencies observed in densely welded nonlithophysal tuff from holes USW GU-3 and USW G-4. The fractures in core from UE-25h No. 1 were found to be smooth and nonmineralized or coated with calcite, silica, or manganese oxide. Open fractures with caliche (porous, nonsparry calcite) were not observed beyond 83.5 ft, which corresponds to an overburden depth of 30 ft.

Norris, A.E.; Byers, F.M. Jr.; Merson, T.J.

1986-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

MINERAL COUNTY COMMISSIONERS  

Broader source: Energy.gov (indexed) [DOE]

Board of Board of MINERAL COUNTY COMMISSIONERS Telephone: 702-945-2446 Fax: 702-945-0706 P.O. Box 4150 Hawthorne, Nevada 89415 JACKIE WALLIS, Chairman GOVERNING BOARD FOR THE TOWNS OF DAN DILLARD, Vice Chairman HAWTHORNE, LUNING AND MINA BOB LYBARGER, Member LIQUOR BOARD GAMING BOARD U.S. Department of Energy Office of General Counsel, GC-52 1000 Independence Ave. S.W. Washington, DC 20585 Dear Sirs: Attached are the comments for modification of the Price-Anderson Act Notice of Inquiry(NOI) provided to the Board of Mineral County Commissioners, in a letter dated January

42

Geodesics and Geodesic Deviation in static Charged Black Holes  

E-Print Network [OSTI]

The radial motion along null geodesics in static charged black hole space-times, in particular, the Reissner-Nordstr\\"om and stringy charged black holes are studied. We analyzed the properties of the effective potential. The circular photon orbits in these space-times are investigated. We found that the radius of circular photon orbits in both charged black holes are different and differ from that given in Schwarzschild space-time. We studied the physical effects of the gravitational field between two test particles in stringy charged black hole and compared the results with that given in Schwarzschild and Reissner-Nordstr\\"om black holes.

Ragab M. Gad

2010-03-03T23:59:59.000Z

43

CO2 Mineral Sequestration Studies  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Sequestration Studies Sequestration Studies Introduction, Issues and Plans Philip Goldberg National Energy Technology Laboratory Workshop on CO 2 Sequestration with Minerals August 8, 2001 Mineral Sequestration Program Research effort seeks to refine and validate a promising CO 2 sequestration technology option, mineral sequestration also known as mineral carbonation Goals: * Understand the fundamental mechanisms involved in mineral carbonation * Generate data to support process development * Operate continuous, integrated small-scale process unit to support design Current Partnerships In order to effectively develop Mineral Sequestration, a multi-laboratory Working Group was formed in the Summer of 1998, participants include: * Albany Research Center * Arizona State University * Los Alamos National Laboratory

44

Engineering and Mineral Resources  

E-Print Network [OSTI]

News ????????????????? ® College of Engineering and Mineral Resources Winter 2008 table of contents. . . . . . . . . . . . . . . . . . . . 7 wvCROSSROADS DepartmentofCivilandEnvironmentalEngineering Civil engineering exchange program and environmental engineering with a focus in transportation will have the opportunity to study abroad as part

Mohaghegh, Shahab

45

Minerals, Microbes, and Remediation:  

Science Journals Connector (OSTI)

...Stucki 2006), they can buffer the redox conditions...minerals in a defined buffer or medium, mostly at...evolution of clay-based buffer properties in underground...Implications for bentonite as backfill material in the disposal...Lagaly, BGK Theng (eds) Handbook of Clay Science. Elsevier...

Hailiang Dong

46

Black Hole Chemistry  

E-Print Network [OSTI]

The mass of a black hole has traditionally been identified with its energy. We describe a new perspective on black hole thermodynamics, one that identifies the mass of a black hole with chemical enthalpy, and the cosmological constant as thermodynamic pressure. This leads to an understanding of black holes from the viewpoint of chemistry, in terms of concepts such as Van der Waals fluids, reentrant phase transitions, and triple points. Both charged and rotating black holes exhibit novel chemical-type phase behaviour, hitherto unseen.

David Kubiznak; Robert B. Mann

2014-04-08T23:59:59.000Z

47

Black holes and thermodynamics  

Science Journals Connector (OSTI)

A black hole of given mass, angular momentum, and charge can have a large number of different unobservable internal configurations which reflect the possible different initial configurations of the matter which collapsed to produce the hole. The logarithm of this number can be regarded as the entropy of the black hole and is a measure of the amount of information about the initial state which was lost in the formation of the black hole. If one makes the hypothesis that the entropy is finite, one can deduce that the black holes must emit thermal radiation at some nonzero temperature. Conversely, the recently derived quantum-mechanical result that black holes do emit thermal radiation at temperature ??2? k c, where ? is the surface gravity, enables one to prove that the entropy is finite and is equal to c3A4 G?, where A is the surface area of the event horizon or boundary of the black hole. Because black holes have negative specific heat, they cannot be in stable thermal equilibrium except when the additional energy available is less than 1/4 the mass of the black hole. This means that the standard statistical-mechanical canonical ensemble cannot be applied when gravitational interactions are important. Black holes behave in a completely random and time-symmetric way and are indistinguishable, for an external observer, from white holes. The irreversibility that appears in the classical limit is merely a statistical effect.

S. W. Hawking

1976-01-15T23:59:59.000Z

48

RHIC | Black Holes?  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Black Holes at RHIC? Black Holes at RHIC? Further discussion by Physicist Dmitri Kharzeev on why RHIC cannot produce a real gravitational black hole Black holes are among the most mysterious objects in the universe. The gravitational field of a black hole is so strong that Einstein's general relativity tells us that nothing, not even light, can escape from the black hole's interior. However, in 1974 physicist Stephen Hawking demonstrated that black holes must emit radiation once the quantum effects are included. According to quantum mechanics, the physical vacuum is bubbling with short-lived virtual particle-antiparticle pairs. Creation of a particle-antiparticle pair from the vacuum conflicts with energy conservation, but energy need not be conserved at short times in quantum mechanics, according to Heisenberg's

49

Mineral Rights and Proceeds (Nebraska)  

Broader source: Energy.gov [DOE]

This section contains provisions which determine when mineral rights are presumed to be abandoned by property owners.

50

Uniformly accelerated black holes  

Science Journals Connector (OSTI)

The static and stationary C metric are examined in a generic framework and their interpretations studied in some detail, especially those with two event horizons, one for the black hole and another for the acceleration. We find that (i) the spacetime of an accelerated static black hole is plagued by either conical singularities or a lack of smoothness and compactness of the black hole horizon, (ii) by using standard black hole thermodynamics we show that accelerated black holes have a higher Hawking temperature than Unruh temperature of the accelerated frame, and (iii) the usual upper bound on the product of the mass and acceleration parameters (<1/27) is just a coordinate artifact. The main results are extended to accelerated rotating black holes with no significant changes.

Patricio S. Letelier and Samuel R. Oliveira

2001-08-24T23:59:59.000Z

51

Accreting Black Holes  

E-Print Network [OSTI]

I outline the theory of accretion onto black holes, and its application to observed phenomena such as X-ray binaries, active galactic nuclei, tidal disruption events, and gamma-ray bursts. The dynamics as well as radiative signatures of black hole accretion depend on interactions between the relatively simple black-hole spacetime and complex radiation, plasma and magnetohydrodynamical processes in the surrounding gas. I will show how transient accretion processes could provide clues to these interactions. Larger global magnetohydrodynamic simulations as well as simulations incorporating plasma microphysics and full radiation hydrodynamics will be needed to unravel some of the current mysteries of black hole accretion.

Begelman, Mitchell C

2014-01-01T23:59:59.000Z

52

Insulating and sheathing materials of electric and optical cables: common test methods part 4-1: methods specific to polyethylene and polypropylene compounds – resistance to environmental stress cracking – measurement of the melt flow index – carbon black and/or mineral filler content measurement in polyethylene by direct combustion – measurement of carbon black content by thermogravimetric analysis (TGA) – assessment of carbon black dispersion in polyethylene using a microscope  

E-Print Network [OSTI]

Specifies the test methods to be used for testing polymeric insulating and sheathing materials of electric cables for power distribution and telecommunications including cables used on ships. Gives the methods for measurements of the resistance to environmental stress cracking, for wrapping test after thermal ageing in air, for measurement of melt flow index and for measurement of carbon black and/or mineral filler content, which apply to PE and PP coumpounds, including cellular compounds and foam skin for insulation.

International Electrotechnical Commission. Geneva

2004-01-01T23:59:59.000Z

53

Mineral Sequestration Utilizing Industrial By-Products, Residues, and Minerals  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

J. Fauth and Yee Soong J. Fauth and Yee Soong U.S. Department of Energy National Energy Technology Laboratory Pittsburgh PA, 15236-0940 Mineral Sequestration Workshop National Energy Technology Laboratory August 8, 2001 Mineral Sequestration Utilizing Industrial By-Products, Residues, and Minerals Mineral Sequestration Workshop, U.S. Department of Energy, NETL, August 8, 2001 Overview * Introduction - Objective - Goals - NETL Facilities * Effect of Solution Chemistry on Carbonation Efficiency - Buffered Solution + NaCl - Buffered Solution + MEA * Effect of Pretreatment on Carbonation Efficiency - Thermal Treatments - Chemical Treatments * Carbonation Reaction with Ultramafic Minerals - Serpentine - Olivine Mineral Sequestration Workshop, U.S. Department of Energy, NETL, August 8, 2001 Overview * Carbonation Reaction with Industrial By-products

54

CONSERVATION OF MINERALS  

Science Journals Connector (OSTI)

...In one field a billion feet of gas are being...after the operations close down...coal and oil and iron...increase in cost through unnecessarily...appear that domestic industries...for mineral production was more...have reduced costs of mining...nearly all fields. The record...efficiency, lower costs and higher...Control of Production: However...exploitation of oil under unrestrained...are: (1) Operation of oil wells with improper gas-oil ratios...inefficient equipment, resulting...

C. K. LEITH

1935-08-09T23:59:59.000Z

55

"Hybrid" Black Holes  

E-Print Network [OSTI]

We discuss a solution of the Einstein equations, obtained by gluing the external Kerr metric and the internal Weyl metric, describing an axisymmetric static vacuum distorted black hole. These metrics are glued at the null surfaces representing their horizons. For this purpose we use the formalism of massive thin null shells. The corresponding solution is called a "hybrid" black hole. The massive null shell has an angular momentum which is the origin of the rotation of the external Kerr spacetime. At the same time, the shell distorts the geometry inside the horizon. The inner geometry of the "hybrid" black hole coincides with the geometry of the interior of a non-rotating Weyl-distorted black hole. Properties of the "hybrid" black holes are briefly discussed.

Valeri P. Frolov; Andrei V. Frolov

2014-12-30T23:59:59.000Z

56

Intermediate-Mass Black Holes as LISA Sources  

E-Print Network [OSTI]

Intermediate-mass black holes (IMBHs), with masses of hundreds to thousands of solar masses, will be unique sources of gravitational waves for LISA. Here we discuss their context as well as specific characteristics of IMBH-IMBH and IMBH-supermassive black hole mergers and how these would allow sensitive tests of the predictions of general relativity in strong gravity.

M. Coleman Miller

2008-12-16T23:59:59.000Z

57

Minerals Technologies | Open Energy Information  

Open Energy Info (EERE)

Place: Bethlehem, PA Website: http:www.mineralstechnologie References: Minerals Technologies1 Information About Partnership with NREL Partnership with NREL Yes Partnership Type...

58

A rotating black hole in the Galactic Center  

E-Print Network [OSTI]

Recent observations of Sgr A* give strong constraints for possible models of the physical nature of Sgr A* and suggest the presence of a massive black~hole with M0.9) accreting 10^-8.5 - 10^-7 M_sun/yr at a black~hole mass of M=2 10^6 M_sunseen almost edge on. A low mass black hole of M' together with simple scaling laws to provide an easy-to-handle test for the black hole model.

Heino Falcke; Peter L. Biermann; Wolfgang J. Duschl; Peter G. Mezger

1992-12-07T23:59:59.000Z

59

Entropy of quasiblack holes  

SciTech Connect (OSTI)

We trace the origin of the black hole entropy S, replacing a black hole by a quasiblack hole. Let the boundary of a static body approach its own gravitational radius, in such a way that a quasihorizon forms. We show that if the body is thermal with the temperature taking the Hawking value at the quasihorizon limit, it follows, in the nonextremal case, from the first law of thermodynamics that the entropy approaches the Bekenstein-Hawking value S=A/4. In this setup, the key role is played by the surface stresses on the quasihorizon and one finds that the entropy comes from the quasihorizon surface. Any distribution of matter inside the surface leads to the same universal value for the entropy in the quasihorizon limit. This can be of some help in the understanding of black hole entropy. Other similarities between black holes and quasiblack holes such as the mass formulas for both objects had been found previously. We also discuss the entropy for extremal quasiblack holes, a more subtle issue.

Lemos, Jose P. S.; Zaslavskii, Oleg B. [Centro Multidisciplinar de Astrofisica-CENTRA, Departamento de Fisica, Instituto Superior Tecnico-IST, Universidade Tecnica de Lisboa-UTL, Avenida Rovisco Pais 1, 1049-001 Lisboa (Portugal); Astronomical Institute of Kharkov, V. N. Karazin National University, 35 Sumskaya Street, Kharkov, 61022 (Ukraine)

2010-03-15T23:59:59.000Z

60

NETL Mineral Carbonation Workshop  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Overview Overview Mineral Carbonation Workshop August 8, 2001 Carl O. Bauer, Associate Laboratory Director Descriptor - include initials, /org#/date We Are: * One of DOE's 15 national laboratories * Government owned and operated * Sites in Oklahoma, Pennsylvania, and West Virginia * Over 1,100 federal and support contractor employees * FY01 budget of $774 million July 2001 Descriptor - include initials, /org#/date Sites in Pennsylvania, West Virginia, Oklahoma Morgantown, WV Pittsburgh, PA Tulsa, OK Descriptor - include initials, /org#/date Our Mission * Resolve the environmental, supply, and reliability constraints of producing and using fossil resources to provide Americans with a stronger economy, healthier environment, and more secure future * Support development and deployment of environmental technologies that reduce

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Lime–Alumina–Silica processing incorporating minerals  

Science Journals Connector (OSTI)

The use of naturally occurring minerals to enhance the physical and mechanical properties of industrial ceramics such as alumina is an attractive alternative to synthetic materials due to cost, chemical stability and availability. Two systems, have been chosen for investigation, alumina–kyanite to produce an alumina–mullite composite and alumina–wollastonite to produce a lime aluminosilicate. Wet processing conditions were optimised using pH/rheology and microelectrophoresis techniques followed by slip casting. The resulting green compacts were subjected to a variety of sintering regimes to produce the desired composites. Sintered products were characterised by techniques such as electron probe microanalysis, hardness tests and toughness determinations. Results are discussed, both in terms of enhanced properties realised (toughness, wear resistance, dielectric), and with respect to the viability of using natural minerals in this application.

R.H Bryden; D.G Goski; W.F Caley

1999-01-01T23:59:59.000Z

62

RHIC | Black Holes?  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Black Holes at RHIC? Black Holes at RHIC? Before RHIC began operations in 2000, some were concerned that it would produce black holes that would threaten the earth. Here's why those concerns were unfounded. Committee Review of Speculative "Disaster Scenarios" at RHIC In July 1999, Brookhaven Lab Director John Marburger convened a committee of distinguished physicists to write a comprehensive report on the arguments that address the safety of speculative disaster scenarios at RHIC. The scenarios are: Creation of a black hole that would "eat" ordinary matter. Initiation of a transition to a new, more stable universe. Formation of a "strangelet" that would convert ordinary matter to a new form. jaffee "We conclude that there are no credible mechanisms for catastrophic

63

Charged Schrodinger black holes  

E-Print Network [OSTI]

We construct charged and rotating asymptotically Schrödinger black hole solutions of type IIB supergravity. We begin by obtaining a closed-form expression for the null Melvin twist of a broad class of type IIB backgrounds, ...

Adams, Allan

64

Holes in Spectral Lines  

E-Print Network [OSTI]

The decay of an atom in the presence of a static perturbation is investigated. The perturbation couples a decaying state with a nondecaying state. A "hole" appears in the emission line at a frequency equal to the frequency ...

Fontana, Peter R.; Srivastava, Rajendra P.

1973-06-01T23:59:59.000Z

65

Special Mineral Properties And Related Structures  

Science Journals Connector (OSTI)

The specific properties detected in definite minerals are the function of mineral structures. The properties are useful in identification of these minerals and have important applications in various fields.

Swapna Mukherjee

2011-01-01T23:59:59.000Z

66

On Black Hole Entropy  

E-Print Network [OSTI]

Two techniques for computing black hole entropy in generally covariant gravity theories including arbitrary higher derivative interactions are studied. The techniques are Wald's Noether charge approach introduced recently, and a field redefinition method developed in this paper. Wald's results are extended by establishing that his local geometric expression for the black hole entropy gives the same result when evaluated on an arbitrary cross-section of a Killing horizon (rather than just the bifurcation surface). Further, we show that his expression for the entropy is not affected by ambiguities which arise in the Noether construction. Using the Noether charge expression, the entropy is evaluated explicitly for black holes in a wide class of generally covariant theories. Further, it is shown that the Killing horizon and surface gravity of a stationary black hole metric are invariant under field redefinitions of the metric of the form $\\bar{g}_{ab}\\equiv g_{ab} + \\Delta_{ab}$, where $\\Delta_{ab}$ is a tensor field constructed out of stationary fields. Using this result, a technique is developed for evaluating the black hole entropy in a given theory in terms of that of another theory related by field redefinitions. Remarkably, it is established that certain perturbative, first order, results obtained with this method are in fact {\\it exact}. The possible significance of these results for the problem of finding the statistical origin of black hole entropy is discussed.}

Ted Jacobson; Gungwon Kang; Robert C. Myers

1994-01-03T23:59:59.000Z

67

Multiphase Sequestration Geochemistry: Model for Mineral Carbonation...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

for Mineral Carbonation. Abstract: Carbonation of formation minerals converts low viscosity supercritical CO2 injected into deep saline reservoirs for geologic sequestration...

68

Investigation of Mineral Transformations in Wet Supercritical...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Mineral Transformations in Wet Supercritical CO2 by Electron Microscopy. Investigation of Mineral Transformations in Wet Supercritical CO2 by Electron Microscopy. Abstract: The...

69

Inducing Mineral Precipitation in Groundwater by Addition of Phosphate  

SciTech Connect (OSTI)

Induced precipitation of phosphate minerals to scavenge trace metals and radionuclides from groundwater is a potential remediation approach for contaminated aquifers. Phosphate minerals can sequester trace elements by primary mineral formation, solid solution formation and/or adsorption, and they are poorly soluble under many environmental conditions, making them attractive for long-term sustainable remediation. The success of such engineered schemes will depend on the particular mineral phases generated, their rates of formation, and their long term stability. The purpose of this study was to examine the precipitation of calcium phosphate minerals under conditions representative of a natural groundwater. Because microorganisms are present in groundwater, and because some proposed schemes for induced phosphate mineral precipitation rely on the stimulation of native groundwater populations, we also tested the effect of bacterial cells (initial densities of 105 and 107 ml-1) within the precipitation medium. We also tested the effect of a trace mixture of propionic, isovaleric, formic and butyric acids (total concentration 0.035 mM). The experiments showed that the general progression of mineral precipitation was similar under all of the conditions, with initial formation of amorphous calcium carbonate, and transformation to poorly crystalline hydroxyapatite (HAP) by the end of the week-long experiments. The presence of the bacterial cells appeared to delay precipitation, although by the end of 7 days the overall extent of precipitation was similar for all of the treatments. The stoichiometry of the final precipitates as well as results of Rietveld refinement of x-ray diffraction data indicated that the treatments including organic acids and bacterial cells resulted in increased distortion of the HAP crystal lattice, with the higher concentration of cells resulting in the greatest distortion. Uptake of Sr into the phosphate minerals was decreased in the treatments with cells and organic acids, compared to the control. The results of the experiments enable a greater understanding of the challenges associated with phosphate-based remediation schemes for contaminated environments.

Karen E. Wright; Yoshiko Fujita; Thomas Hartmann; Mark Conrad

2011-10-01T23:59:59.000Z

70

Color Tables for Mineral Identification  

Science Journals Connector (OSTI)

Fluorescent color can be a useful guide to mineral identification, and in some cases, it is the quickest and least expensive means. In the mines at Franklin and Ogdensburg, New Jersey, a portable battery opera...

Manuel Robbins

1983-01-01T23:59:59.000Z

71

Mössbauer Spectroscopy of Silicate Minerals  

Science Journals Connector (OSTI)

Silicate minerals are the commonest accessible materials on Earth. Thanks to the strong affinity of silicon for oxygen and the low density of the resulting oxides (3 g/cm3) compared with the average global densit...

J. M. D. Coey

1984-01-01T23:59:59.000Z

72

Thermal Gradient Holes At Central Nevada Seismic Zone Region (Pritchett,  

Open Energy Info (EERE)

Thermal Gradient Holes At Central Nevada Seismic Zone Region (Pritchett, Thermal Gradient Holes At Central Nevada Seismic Zone Region (Pritchett, 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Central Nevada Seismic Zone Region (Pritchett, 2004) Exploration Activity Details Location Central Nevada Seismic Zone Geothermal Region Exploration Technique Thermal Gradient Holes Activity Date Usefulness useful DOE-funding Unknown Notes NOTE: These are theoretical/computer simulation tests of various methods on eight hypothetical 'model' basing-and-range geothermal systems. "The 300-meter heat flow holes are essentially useless for finding the "hidden" reservoirs. Clearly, the best results are obtained from the SP and MT surveys, with DC resistivity a close third. It is concluded that the best

73

Chapter 15 Mineral Resources and the Environment  

E-Print Network [OSTI]

of the materials. Responses to limited availability #12; Find more resources Find a substitute Recycle whatChapter 15 Mineral Resources and the Environment #12;Minerals found in a typical office #12; Mineral resources, human population, and modern society Resources and reserves Availability of mineral

Pan, Feifei

74

Black holes at accelerators.  

E-Print Network [OSTI]

ar X iv :h ep -p h/ 05 11 12 8v 3 6 A pr 2 00 6 Black Holes at Accelerators Bryan Webber Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, UK In theories with large extra dimensions and TeV-scale gravity, black holes... 2000 3000 Missing ET (GeV) Ar bi tra ry S ca le p p ? QCD SUSY 5 TeV BH (n=6) 5 TeV BH (n=2) (PT > 600 GeV) (SUGRA point 5) Figure 10: Missing transverse energy for various processes at the LHC. 4.2. Event Characteristics Turning from single...

Webber, Bryan R

75

Gedanken experiments on nearly extremal black holes and the third law  

SciTech Connect (OSTI)

A gedanken experiment in which a black hole is pushed to spin at its maximal rate by tossing into it a test body is considered. After demonstrating that this is kinematically possible for a test body made of reasonable matter, we focus on its implications for black hole thermodynamics and the apparent violation of the third law (unattainability of the extremal black hole). We argue that this is not an actual violation, due to subtleties in the absorption process of the test body by the black hole, which are not captured by the purely kinematic considerations.

Chirco, Goffredo; Liberati, Stefano [SISSA-International School for Advanced Studies, Via Bonomea 265, 34136 Trieste (Italy) and INFN sezione di Trieste (Italy); Sotiriou, Thomas P. [Department of Applied Mathematics and Theoretical Physics, Center for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge, CB3 0WA (United Kingdom)

2010-11-15T23:59:59.000Z

76

New Mineral Names  

Science Journals Connector (OSTI)

...5 nA. The electron beam was rastered over an area 2 2 mm2. The correctness of Mg and As determination was proved using talmessite as a test sample. Na, K, Ca, Sr, Ba, Zn, Ni, V, Sb, Al, Ti, Si, S, Cl, and F were below detection limits...

Kimberly T. Tait

77

CRYSTAL CHEMISTRY OF HYDROUS MINERALS  

SciTech Connect (OSTI)

Hydrogen has long been appreciated for its role in geological processes of the Earth's crust. However, its role in Earth's deep interior has been neglected in most geophysical thinking. Yet it is now believed that most of our planet's hydrogen may be locked up in high pressure phases of hydrous silicate minerals within the Earth's mantle. This rocky interior (approximately 7/8 of Earth's volume) is conjectured to contain 1-2 orders of magnitude more water than the more obvious oceans (the ''hydrosphere'') and atmosphere. This project is aimed at using the capability of neutron scattering from hydrogen to study the crystal chemistry and stability of hydrogen-bearing minerals at high pressures and temperatures. At the most basic level this is a study of the atomic position and hydrogen bond itself. We have conducted experimental runs on hydrous minerals under high pressure and high temperature conditions. The crystallographic structure of hydrous minerals at extreme conditions and its structural stability, and hydrogen bond at high P-T conditions are the fundamental questions to be addressed. The behavior of the hydrous minerals in the deep interior of the Earth has been discussed.

Y. ZHAO; ET AL

2001-02-01T23:59:59.000Z

78

Inside a black hole  

Science Journals Connector (OSTI)

... interior. These models reveal several significantly different behaviours. The simplest model, of a 'Schwarzschild' black hole, which possesses mass but no charge or angular momentum, has an ... into account, seal off the 'tunnel', and yield an interior similar to the Schwarzschild model, with an all-encompassing crushing singularity. More recently, there have been attempts6- ...

William A. Hiscock

1991-10-24T23:59:59.000Z

79

Laser bottom hole assembly  

DOE Patents [OSTI]

There is provided for laser bottom hole assembly for providing a high power laser beam having greater than 5 kW of power for a laser mechanical drilling process to advance a borehole. This assembly utilizes a reverse Moineau motor type power section and provides a self-regulating system that addresses fluid flows relating to motive force, cooling and removal of cuttings.

Underwood, Lance D; Norton, Ryan J; McKay, Ryan P; Mesnard, David R; Fraze, Jason D; Zediker, Mark S; Faircloth, Brian O

2014-01-14T23:59:59.000Z

80

A List of Kansas Minerals  

E-Print Network [OSTI]

that mineral occurs. I t i s a i found associated with A n g l e s i t e t I t i s reported from Cherokee county. C e l e s t i t e (720). Orthorhombic, composition strontium sulphate Sr S0*j. This mineral has been found q u i t e s p a r i n g l y i n...Master Th e s i s Geology Grov e r , C h a r l e s H. 1895 L i s t of Kansas m i n e r a l s * A l i s t of Kansas Minerals with "brief notes on the^cr^stjalogr&phio (form, chemical composition, and the p r i n c i p a l l o c a l i t i e s f...

Grover, Charles H.

1895-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Graphene tests of Klein phenomena  

E-Print Network [OSTI]

Graphene is characterized by chiral electronic excitations. As such it provides a perfect testing ground for the production of Klein pairs (electron/holes). If confirmed, the standard results for barrier phenomena must be reconsidered with, as a byproduct, the accumulation within the barrier of holes.

Stefano De Leo; Pietro Rotelli

2012-02-07T23:59:59.000Z

82

Mineral County Secondary Data Analysis  

E-Print Network [OSTI]

prevalence (Heart Attack) 4.0% 4.1% 6.0% All Sites Cancer 466.5 455.5 543.2 1 Community Health Data, MT2 1. Cancer 2. Heart Disease 3. Unintentional Injuries**, CLRD*, Cerebrovascular Disease 1. Cancer 2. Heart Disease 3.CLRD* 1. Heart Disease 2. Cancer 3. CLRD* #12; Mineral County

Maxwell, Bruce D.

83

THE INTERNATIONAL RELATIONSHIP OF MINERALS  

Science Journals Connector (OSTI)

...ap-plied to China. Assuming that China may yet become a homogeneous...If they agree in refusing to export mineral products to those countries...learned, it is easier to stop exports than to prevent imports: the customs' officer is more...

Thomas Holland

1929-08-02T23:59:59.000Z

84

Institute for Mineral and Energy  

E-Print Network [OSTI]

. The University of Adelaide is unique within Australia for its strong research and teaching groups in geology fields of research are: · Earth Sciences ­ geology; geochemistry; geo-sequestration; geophysics to 10 per cent per annum while other minerals such as uranium and rare earth elements will become

85

Supermassive Black Holes  

E-Print Network [OSTI]

Supermassive black holes have generally been recognized as the most destructive force in nature. But in recent years, they have undergone a dramatic shift in paradigm. These objects may have been critical to the formation of structure in the early universe, spawning bursts of star formation and nucleating proto-galactic condensations. Possibly half of all the radiation produced after the Big Bang may be attributed to them, whose number is now known to exceed 300 million. The most accessible among them is situated at the Center of Our Galaxy. In the following pages, we will examine the evidence that has brought us to this point, and we will understand why many expect to actually image the event horizon of the Galaxy's central black hole within this decade.

Fulvio Melia

2007-05-10T23:59:59.000Z

86

Black hole lasers  

Science Journals Connector (OSTI)

High frequency dispersion does not alter the low frequency spectrum of Hawking radiation from a single black hole horizon, whether the dispersion entails subluminal or superluminal group velocities. We show here that in the presence of an inner horizon as well as an outer horizon the superluminal case differs dramatically however. The negative energy partners of Hawking quanta return to the outer horizon and stimulate more Hawking radiation if the field is bosonic or suppress it if the field is fermionic. This process leads to exponential growth or damping of the radiated flux and correlations among the quanta emitted at different times, unlike in the usual Hawking effect. These phenomena may be observable in condensed matter black hole analogues that exhibit “superluminal” dispersion.

Steven Corley and Ted Jacobson

1999-05-17T23:59:59.000Z

87

Tweed, Twins, and Holes  

E-Print Network [OSTI]

distribution is that of collapsing porous minerals under stress, where the main focus of research is the identification of precursor effects as warning signs for larger events such as the collapse of mines, boreholes or even regional earth quakes... science in which the functionality of a device material is no longer expected to be present in the bulk of the material but located in its nanoscopically small regions such as twin boundaries. This approach is summarized as ‘domain boundary engineering...

Salje, Ekhard K.H.

2014-07-08T23:59:59.000Z

88

LOW TEMPERATURE GEOTHERMAL MINERAL RECOVERY PROGRAM 02/11/2014...  

Energy Savers [EERE]

LOW TEMPERATURE GEOTHERMAL MINERAL RECOVERY PROGRAM 02112014 LOW TEMPERATURE GEOTHERMAL MINERAL RECOVERY PROGRAM 02112014 mineral-webinar.pdf More Documents & Publications LOW...

89

Roadmap to the Project: Uranium Miners Resources  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

EXECUTIVE SUMMARY EXECUTIVE SUMMARY On October 15, 1990, Congress passed the Radiation Exposure Compensation Act of 1990 (RECA), which provided for compassionate payments to individuals who suffered from specified diseases presumably as a result of exposure to radiation in connection with the federal government's nuclear weapons testing program. Among those eligible for compensation under the Act are individuals who were employed in underground uranium mines in Arizona, Colorado, New Mexico, Utah or Wyoming during the 1947 to 1971 time period, who were exposed to specified minimum levels of radon, and who contracted specified lung disorders. The Department of Justice administers the RECA through the Radiation Exposure Compensation Program (Program). The provisions of the RECA defining compensation for uranium miners have been characterized by critics as unfair and inconsistent with current scientific information. The regulations of the Department of Justice implementing the statute have also been criticized as being unnecessarily stringent and unreasonably burdensome. These criticisms were noted, and in some cases affirmed, by the President's Advisory Committee on Human Radiation Experiments, charged by the President to investigate the history of human radiation experimentation conducted by the federal government during the Cold War period. In its Final Report, issued on October 3, 1995, the Advisory Committee recommended, among other things, that the Administration review the provisions of RECA governing compensation for uranium miners and the implementing regulations to ensure that they are fair, consistent with current scientific evidence, and compatible with the objectives of the Act.

90

Mineral Transformation and Biomass Accumulation Associated With  

E-Print Network [OSTI]

Mineral Transformation and Biomass Accumulation Associated With Uranium Bioremediation at Rifle transformation and biomass accumulation, both of which can alter the flow field and potentially bioremediation to understand the biogeochemical processes and to quantify the biomass and mineral transformation/ accumulation

Hubbard, Susan

91

Remote Sensing of Soils, Minerals, and Geomorphology  

E-Print Network [OSTI]

,Remote Sensing of Soils, Minerals, and GeomorphologyMinerals, and Geomorphology · Soil is unconsolidated material). ·· SoilSoil is unconsolidated material at the surface of the Earth thatis unconsolidated material

92

Relativistic hydrodynamics in the presence of puncture black holes  

SciTech Connect (OSTI)

Many of the recent numerical simulations of binary black holes in vacuum adopt the moving puncture approach. This successful approach avoids the need to impose numerical excision of the black hole interior and is easy to implement. Here we wish to explore how well the same approach can be applied to moving black hole punctures in the presence of relativistic hydrodynamic matter. First, we evolve single black hole punctures in vacuum to calibrate our Baumgarte-Shapiro-Shibata-Nakamura implementation and to confirm that the numerical solution for the exterior spacetime is invariant to any junk (i.e., constraint-violating) initial data employed in the black hole interior. Then we focus on relativistic Bondi accretion onto a moving puncture Schwarzschild black hole as a numerical test bed for our high-resolution shock-capturing relativistic hydrodynamics scheme. We find that the hydrodynamical equations can be evolved successfully in the interior without imposing numerical excision. These results help motivate the adoption of the moving puncture approach to treat the binary black hole-neutron star problem using conformal thin-sandwich initial data.

Faber, Joshua A.; Etienne, Zachariah B.; Shapiro, Stuart L.; Taniguchi, Keisuke [Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States); Baumgarte, Thomas W. [Department of Physics and Astronomy, Bowdoin College, Brunswick, Maine 04011 (United States)

2007-11-15T23:59:59.000Z

93

HEATER TEST PLANNING FOR THE NEAR SURFACE TEST FACILITY AT THE HANFORD RESERVATION  

E-Print Network [OSTI]

Heater Experiment at Hanford. Berkeley, Lawre ;e BerkeleyTest Facility, Hole DC-11, Hanford Reservation. Prepared forof Gable Mountain Basalt Cores, Hanford Nuclear Reservation.

DuBois, A.

2010-01-01T23:59:59.000Z

94

ROCKY MOUNTAIN OILFIELD TESTING CENTER PROJECT TEST RESULTS  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

06/97DT15 06/97DT15 RMOTC Test Report Rotary Steerable Stabilizer Smith Drilling and Completions 16740 Hardy Street P. 0. Box 60068 Houston, Texas, 77205-0068 281-443-3370 Leo Giangiacorno, Acting Project Manager Rocky Mountain Oilfield Testing Center December 17, 1997 Introduction Directional drilling is more expensive than vertical drilling. This is due to the high maintenance cost of downhole motors and MWD systems required to control hole trajectory. In addition, directional holes have lower penetration rates due to the poor hole cleaning with a non-rotating string. Down time is often spent orienting tool face to obtain the desired trajectory after tile weight is placed on the bit and the reactive torque of the motor is absorbed by the drill string. Holes drilled in this manner often have a tortuous profile compared to holes drilled with a rotary system, increasing the torque

95

Repairs for damaged bolt holes in continuous fiber reinforced plastics  

E-Print Network [OSTI]

repair method for damaged bolt holes in such composites. Bolt holes in three types of graphite-epoxy were purposely damaged and then repaired. Each was tested to characterize its static and fatigue behavior. The tests used a special fixture to simulate... composite joints . Bearing-bypass ratio can change the failure mode of bolted composite joints 7 Drilling defects in graphite-epoxy coupons 12 26 The exit side of a IM7/8551-7A 18 ply tape coupon showing the damage due to drilling 27 9 Resin filled...

Copps, Kevin Daniel

2012-06-07T23:59:59.000Z

96

Slim Holes At Blue Mountain Area (Fairbank Engineering, 2009) | Open Energy  

Open Energy Info (EERE)

Fairbank Engineering, 2009) Fairbank Engineering, 2009) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Slim Holes At Blue Mountain Area (Fairbank Engineering, 2009) Exploration Activity Details Location Blue Mountain Area Exploration Technique Slim Holes Activity Date Usefulness useful DOE-funding Unknown Notes DEEP BLUE No.1, the first slim geothermal observation test hole at Blue Mountain, was drilled under a cost-share program between the DOE and Noramex, under the DOE's Geothermal Resource Exploration and Definition (GRED) program, (Noramex Corp., 2002). The hole was sited to test an area of projected high temperature at depth from gradients measured in shallow holes drilled in the central part of the lease area (Figure 3.1), and to test an area of low apparent resistivity interpreted to reflect possible

97

Black Holes And Their Entropy  

E-Print Network [OSTI]

This dissertation covers two di erent but related topics: the construction of new black hole solutions and the study of the microscopic origin of black hole entropy. In the solution part, two di erent sets of new solutions are found. The rst...

Mei, Jianwei

2010-10-12T23:59:59.000Z

98

Black Hole Energy Extraction Problems  

Science Journals Connector (OSTI)

... non-rotating black hole the particle can be lowered to no closer than 1.14 Schwarzschild radii, and the energy extracted can be no more than 63.2 per cent ... gram of matter-and the rope could be lowered no closer than 5 x 1011 Schwarzschild radii. This seems to rule out black holes as practical sources of energy. ...

1972-11-24T23:59:59.000Z

99

Optical black holes and solitons  

E-Print Network [OSTI]

We exhibit a static, cylindrically symmetric, exact solution to the Euler-Heisenberg field equations (EHFE) and prove that its effective geometry contains (optical) black holes. It is conjectured that there are also soliton solutions to the EHFE which contain black hole geometries.

Shawn Westmoreland

2010-12-21T23:59:59.000Z

100

Entropy of Lovelock Black Holes  

E-Print Network [OSTI]

A general formula for the entropy of stationary black holes in Lovelock gravity theories is obtained by integrating the first law of black hole mechanics, which is derived by Hamiltonian methods. The entropy is not simply one quarter of the surface area of the horizon, but also includes a sum of intrinsic curvature invariants integrated over a cross section of the horizon.

Ted Jacobson; Robert C. Myers

1993-05-06T23:59:59.000Z

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

String-Corrected Black Holes  

SciTech Connect (OSTI)

We investigate the geometry of four dimensional black hole solutions in the presence of stringy higher curvature corrections to the low energy effective action. For certain supersymmetric two charge black holes these corrections drastically alter the causal structure of the solution, converting seemingly pathological null singularities into timelike singularities hidden behind a finite area horizon. We establish, analytically and numerically, that the string-corrected two-charge black hole metric has the same Penrose diagram as the extremal four-charge black hole. The higher derivative terms lead to another dramatic effect -- the gravitational force exerted by a black hole on an inertial observer is no longer purely attractive! The magnitude of this effect is related to the size of the compactification manifold.

Hubeny, Veronika; Maloney, Alexander; Rangamani, Mukund

2005-02-07T23:59:59.000Z

102

Compound and Elemental Analysis At Seven Mile Hole Area (Larson, Et Al.,  

Open Energy Info (EERE)

2009) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Compound and Elemental Analysis At Seven Mile Hole Area (Larson, Et Al., 2009) Exploration Activity Details Location Seven Mile Hole Area Exploration Technique Compound and Elemental Analysis Activity Date Usefulness not indicated DOE-funding Unknown Notes Standard X-ray diffractometer (XRD) analyses were used in the laboratory to confirm the PIMA mineral identifications and to look for minerals that have poor SWIR response (e.g., quartz and feldspars) or were not present in great enough concentrations to be detected by the PIMA. Petrographic and electron microprobe analyses of selected samples were conducted in the laboratories of the GeoAnalytical Laboratory at Washington State

103

Evaluation of RME (rapeseed methyl ester) and mineral diesel fuels behaviour in quiescent vessel and EURO 5 engine  

Science Journals Connector (OSTI)

Abstract Alternative diesel fuels for internal combustion engines have grown significantly in interest in the last decade. This is due to the potential benefits in pollutant emissions and particulate matter reduction. Nevertheless at possible increase in nitrogen oxide (NOx), and almost certainly increase of fuel consumption have been observed. In this paper, mineral diesel and RME (rapeseed methyl ester) fuels have been characterized in a non-evaporative spray chamber and in an optically-accessible single-cylinder engine using a Common Rail injector (8 holes, 148° cone opening angle and 480 cc/30s@10 MPa flow number) to measure the spatial fuel distribution, the temporal evolution and the vaporization–combustion processes. The injection process and mixture formation have been investigated at the Urban Driving Cycle ECE R15: 1500 rpm at 0.2 MPa of break mean effective pressure. Characteristic parameters of the spray like penetration length and liquid fuel distribution have been analysed and they have been correlated with the exhaust gaseous and particulate matter emissions. In the spray-analysis in non-evaporative conditions, short events (pilot) are mostly affected by asymmetries in the fuel distributions with noticeable standard deviations at low injected quantities. In the engine tests, the jets reached immediately the stabilization. A comparative analysis on the liquid phase of the spray, in non-evaporative and evaporative conditions, has permitted to investigate better the mixture formation. Its effect on pollutant emissions has been analysed for both fuels.

Luigi Allocca; Ezio Mancaruso; Alessandro Montanaro; Luigi Sequino; Bianca Maria Vaglieco

2014-01-01T23:59:59.000Z

104

Silicate Production and Availability for Mineral Carbonation  

Science Journals Connector (OSTI)

(2, 3) Through mineral carbonation, the weathering of silicate minerals on land and the precipitation of carbonates in oceans is a natural negative feedback mechanism that stabilizes the Earth’s climate over geological time scales. ... The existence of Greek specifications of RCA, the European ones will come much later, will help Olympic Games 2004 to be as "green" as possible. ... The minerals calcite, feldspar, lime and periclase are present in ashes derived from Polish coal and/or woodchips. ...

P. Renforth; C.-L. Washbourne; J. Taylder; D. A. C. Manning

2011-02-18T23:59:59.000Z

105

Stellar black holes and the origin of cosmic acceleration  

Science Journals Connector (OSTI)

The discovery of cosmic acceleration has presented a unique challenge for cosmologists. As observational cosmology forges ahead, theorists have struggled to make sense of a standard model that requires extreme fine-tuning. This challenge is known as the cosmological constant problem. The theory of gravitational aether is an alternative to general relativity that does not suffer from this fine-tuning problem, as it decouples the quantum field theory vacuum from geometry, while remaining consistent with other tests of gravity. In this paper, we study static black hole solutions in this theory and show that it manifests a UV-IR coupling: Aether couples the space-time metric close to the black hole horizon, to metric at infinity. We then show that using the trans-Planckian ansatz (as a quantum gravity effect) close to the black hole horizon, leads to an accelerating cosmological solution, far from the horizon. Interestingly, this acceleration matches current observations for stellar-mass black holes. Based on our current understanding of the black hole accretion history in the Universe, we then make a prediction for how the effective dark energy density should evolve with redshift, which can be tested with future dark energy probes.

Chanda Prescod-Weinstein; Niayesh Afshordi; Michael L. Balogh

2009-08-18T23:59:59.000Z

106

Hydrothermal alteration in research drill hole Y-2, Lower Geyser Basin, Yellowstone National Park, Wyoming  

SciTech Connect (OSTI)

Y-2, a US Geological Survey research diamond-drill hole in Lower Geyser Basin, Yellowstone National Park, was drilled to a depth of 157.4 meters. The hole penetrated interbedded siliceous sinter and travertine to 10.2 m, glacial sediments of the Pinedale Glaciation interlayered with pumiceous tuff from 10.2 to 31.7 m, and rhyolitic lavas of the Elephant Back flow of the Central Plateau Member and the Mallard Lake Member of the Pleistocene Plateau Rhyolite from 31.7 to 157.4 m. Hydrothermal alteration is pervasive in most of the nearly continuous drill core. Rhyolitic glass has been extensively altered to clay and zeolite minerals (intermediate heulandite, clinoptilolite, mordenite, montmorillonite, mixed-layer illite-montmorillonite, and illite) in addition to quartz and adularia. Numerous veins, vugs, and fractures in the core contain these and other minerals: silica minerals (opal, ..beta..-cristobalite, ..cap alpha..-cristobalite, and chalcedony), zeolites (analcime, wairakite, dachiardite, laumontite, and yugawaralite), carbonates (calcite and siderite), clay (kaolinite and chlorite), oxides (hematite, goethite, manganite, cryptomelane, pyrolusite, and groutite), and sulfides (pyrhotite and pyrite) along with minor aegirine, fluorite, truscottite, and portlandite. Interbedded travertine and siliceous sinter in the upper part of the drill core indicate that two distinct types of thermal water are responsible for precipitation of the surficial deposits, and further that the water regime has alternated between the two thermal waters more than once since the end of the Pinedale Glaciation (approx. 10,000 years B.P.). Alternation of zones of calcium-rich and sodium- and potassium-rich hydrothermal minerals also suggests that the calcium-rich and sodium- and potassium-rich hydrothermal minerals also suggests that the water chemistry in this drill hole varies with depth.

Bargar, K.E.; Beeson, M.H.

1981-05-01T23:59:59.000Z

107

The structure of black hole magnetospheres — I. Schwarzschild black holes  

Science Journals Connector (OSTI)

......2000 RAS, MNRAS 315, 89 97 force-free black hole magnetosphere...However, there is nothing fundamental about the paraboloidal shape...in stationary axisymmetric force-free magnetospheres. Therefore...Stegun I. A., 1972, Handbook of Mathematical Functions......

Pranab Ghosh

2000-06-11T23:59:59.000Z

108

Parageneses and Crystal Chemistry of Arsenic Minerals  

Science Journals Connector (OSTI)

...minerals identified in this paragenesis. Talmessite, annabergite, kottigite, hornesite...sainfeldite/ fluckite, villyaellenite, talmessite, annabergite, kottigite, parasymplesite...conichalcite, mimetite, olivenite, talmessite and yukonite (Dietrich 1960; Smolyaninova...

Juraj Majzlan; Petr Drahota; Michal Filippi

109

Black Holes in Active Galaxies  

E-Print Network [OSTI]

Recent years have seen tremendous progress in the quest to detect supermassive black holes in the centers of nearby galaxies, and gas-dynamical measurements of the central masses of active galaxies have been valuable contributions to the local black hole census. This review summarizes measurement techniques and results from observations of spatially resolved gas disks in active galaxies, and reverberation mapping of the broad-line regions of Seyfert galaxies and quasars. Future prospects for the study of black hole masses in active galaxies, both locally and at high redshift, are discussed.

A. J. Barth

2003-10-15T23:59:59.000Z

110

Thermodynamics of Lifshitz black holes  

Science Journals Connector (OSTI)

We apply the recently extended conserved Killing charge definition of Abbott-Deser-Tekin formalism to compute, for the first time, the energies of analytic Lifshitz black holes in higher dimensions. We then calculate the temperature and the entropy of this large family of solutions, and study and discuss the first law of black hole thermodynamics. Along the way we also identify the possible critical points of the relevant quadratic curvature gravity theories. Separately, we also apply the generalized Killing charge definition to compute the energy and the angular momentum of the warped AdS3 black hole solution of the three-dimensional new massive gravity theory.

Deniz Olgu Devecio?lu and Özgür Sar?o?lu

2011-06-23T23:59:59.000Z

111

Big-hole drilling - the state of the art  

SciTech Connect (OSTI)

The art of big-hole drilling has been in a continual state of evolution at the Nevada Test Site since the start of underground testing in 1961. Emplacement holes for nuclear devices are still being drilled by the rotary-drilling process, but almost all the hardware and systems have undergone many changes during the intervening years. The current design of bits, cutters, and other big-hole-drilling hardware results from contributions of manufacturers and Test Site personnel. The dual-string, air-lift, reverse-circulation system was developed at the Test Site. Necessity was really the Mother of this invention, but this circulation system is worthy of consideration under almost any condition. Drill rigs for big-hole drilling are usually adaptations of large oil-well drill rigs with minor modifications required to handle the big bits and drilling assemblies. Steel remains the favorite shaft lining material, but a lot of thought is being given to concrete linings, especially precast concrete.

Lackey, M.D.

1983-01-01T23:59:59.000Z

112

Core Holes At Lake City Hot Springs Area (Benoit Et Al., 2005) | Open  

Open Energy Info (EERE)

Holes At Lake City Hot Springs Area (Benoit Et Holes At Lake City Hot Springs Area (Benoit Et Al., 2005) Exploration Activity Details Location Lake City Hot Springs Area Exploration Technique Core Holes Activity Date Usefulness useful DOE-funding Unknown Notes Three core holes drilled between 2002 and 2005. Depths: 1,728; 3,435; 4,727 ft. Two deeper wells encountered temps of 327 and 329 oF and permable fractures in sedimentary and volcanic rocks; enabled injection and flow testing up to 70 gpm. Quartz fluid inclusions give temps of 264 and 316 oF. Core drillling allowed an understanding of geology and geothermal system that could never have been obtained from cuttings in this particular geologic setting. References Dick Benoit, Joe Moore, Colin Goranson, David Blackwell (2005) Core Hole Drilling And Testing At The Lake City, California Geothermal Field

113

Effects of mineral fillers in slurry seal mixtures  

E-Print Network [OSTI]

. 48 2. 12 2. 19 2. 22 2. 23 1. 46 2. 12 2. 21 2. 25 2. 26 36. 8 9. 4 6. 4 5. 1 4. 7 37. 6 8. 6 5. 6 3. 8 3. 4 egased on computed maximum theoretical specific gravity ~ 2. 34 After compaction the specimens were measured for density... 1 Young Wet Track Abrasion Device. Page . 18 2 Aggregate Gradation. . 3 Mineral Piller Gradation. . 26 . 28 4 Sketch of Typical Specimen. . 5 Slurry Seal Test Specimen - Excellent 6 Slurry Seal Test Specimen - Unsatisfactory. . 7 Slurry...

Harper, William Joe

2012-06-07T23:59:59.000Z

114

Adsorption of VOCs from the Gas Phase to Different Minerals and a Mineral Mixture  

Science Journals Connector (OSTI)

Adsorption of VOCs from the Gas Phase to Different Minerals and a Mineral Mixture ... Here adsorption to three well-defined minerals (hematite, corundum, and lime) was studied by a chromatographic method. ... (39)?Suzuki, S.; Green, P. G.; Bumgarner, R. E.; Dasgupta, S.; Goddard, W. A.; Blake, G. A. Science 1992, 257, 942?945. ...

Kai-Uwe Goss; Steven J. Eisenreich

1996-06-26T23:59:59.000Z

115

Slim Holes | Open Energy Information  

Open Energy Info (EERE)

Slim Holes Slim Holes Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Slim Holes Details Activities (30) Areas (24) Regions (1) NEPA(6) Exploration Technique Information Exploration Group: Drilling Techniques Exploration Sub Group: Exploration Drilling Parent Exploration Technique: Exploration Drilling Information Provided by Technique Lithology: If core is collected Stratigraphic/Structural: If core is collected Hydrological: Fluid flow and water chemistry Thermal: Thermal gradient or bottom hole temperature Cost Information Low-End Estimate (USD): 100.0010,000 centUSD 0.1 kUSD 1.0e-4 MUSD 1.0e-7 TUSD / foot Median Estimate (USD): 169.8916,989 centUSD 0.17 kUSD 1.6989e-4 MUSD 1.6989e-7 TUSD / foot High-End Estimate (USD): 200.0020,000 centUSD

116

Life in a Tree Hole  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Tree Hole Tree Hole Nature Bulletin No. 581 November 21, 1959 Forest Preserve District of Cook County Daniel Ryan, President Roberts Mann, Conservation Editor David H Thompson, Senior Naturalist LIFE IN A TREE HOLE A forest is much more than just trees. It includes all of the underbrush, wildflowers and other vegetation that grow beneath these trees; as well as all of its animal life, both large and small. Sunshine, rain, wind, soil, and the leaf litter on the ground are part of it, too. A forest is a community -- a fabric in which the lives of its inhabitants are woven together and into their surroundings by a complex web of interrelations. Tree holes -- together with the birds, mammals and small life which they shelter -- furnish an important binding force in this forest community.

117

Thermodynamics of regular black hole  

E-Print Network [OSTI]

We investigate thermodynamics for a magnetically charged regular black hole (MCRBH), which comes from the action of general relativity and nonlinear electromagnetics, comparing with the Reissner-Norstr\\"om (RN) black hole in both four and two dimensions after dimensional reduction. We find that there is no thermodynamic difference between the regular and RN black holes for a fixed charge $Q$ in both dimensions. This means that the condition for either singularity or regularity at the origin of coordinate does not affect the thermodynamics of black hole. Furthermore, we describe the near-horizon AdS$_2$ thermodynamics of the MCRBH with the connection of the Jackiw-Teitelboim theory. We also identify the near-horizon entropy as the statistical entropy by using the AdS$_2$/CFT$_1$ correspondence.

Yun Soo Myung; Yong-Wan Kim; Young-Jai Park

2007-08-23T23:59:59.000Z

118

A Preliminary Study Of Older Hot Spring Alteration In Sevenmile Hole, Grand  

Open Energy Info (EERE)

Study Of Older Hot Spring Alteration In Sevenmile Hole, Grand Study Of Older Hot Spring Alteration In Sevenmile Hole, Grand Canyon Of The Yellowstone River, Yellowstone Caldera, Wyoming Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Preliminary Study Of Older Hot Spring Alteration In Sevenmile Hole, Grand Canyon Of The Yellowstone River, Yellowstone Caldera, Wyoming Details Activities (4) Areas (1) Regions (0) Abstract: Erosion in the Grand Canyon of the Yellowstone River, Yellowstone Caldera (640 ka), Wyoming, has exposed a cross section of older hydrothermal alteration in the canyon walls. The altered outcrops of the post-collapse tuff of Sulphur Creek (480 ka) extend from the canyon rim to more than 300 m beneath it. The hydrothermal minerals are zoned, with an advanced argillic alteration consisting of an association of quartz (opal)

119

The black hole dynamical horizon and generalized second law of thermodynamics  

E-Print Network [OSTI]

The generalized second law of thermodynamics for a system containing a black hole dynamical horizon is proposed in a covariant way. Its validity is also tested in case of adiabatically collapsing thick light shells.

Song He; Hongbao Zhang

2007-12-08T23:59:59.000Z

120

Of the Black Hole Thermodynamics  

E-Print Network [OSTI]

About thirty years ago, Bekenstein and Hawking introduced three basic concepts relating to black hole, namely, the "area entropy", "gravitation temperature" and "thermal radiation". The author analyzes these concepts systematically and concludes that they are mostly inadequate or wrong. He points out that a black hole's taking in thermal radiation from the space is an energy-gathering process. It is special, even extraordinary. It reduces entropy, violating Clausius' second law.

Xinyong Fu

2005-01-11T23:59:59.000Z

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Automatic CNC Part Programming for through Hole Drilling  

Science Journals Connector (OSTI)

Abstract This paper describes a novel method for automatic generation of process plans and numerical control (NC) part programs from STEP data files. Using proposed system, it is possible to achieve fully automation of recognition of through hole features, generation of process plans and NC part programs. Thus, it becomes possible to go from neutral file to finished product in a fully automated fashion. The algorithms have been implemented on mini-computer to process product data, and display recognized hole features, process plans and creates output files containing NC part programs. These NC part programs are tested through BMV45TC24 CNC Vertical Machining Centers. The results are satisfactory.

B.R. Borkar; Y.M. Puri; A.M. Kuthe; P.S. Deshpande

2014-01-01T23:59:59.000Z

122

Lattice Black Holes  

E-Print Network [OSTI]

We study the Hawking process on lattices falling into static black holes. The motivation is to understand how the outgoing modes and Hawking radiation can arise in a setting with a strict short distance cutoff in the free-fall frame. We employ two-dimensional free scalar field theory. For a falling lattice with a discrete time-translation symmetry we use analytical methods to establish that, for Killing frequency $\\omega$ and surface gravity $\\kappa$ satisfying $\\kappa\\ll\\omega^{1/3}\\ll 1$ in lattice units, the continuum Hawking spectrum is recovered. The low frequency outgoing modes arise from exotic ingoing modes with large proper wavevectors that "refract" off the horizon. In this model with time translation symmetry the proper lattice spacing goes to zero at spatial infinity. We also consider instead falling lattices whose proper lattice spacing is constant at infinity and therefore grows with time at any finite radius. This violation of time translation symmetry is visible only at wavelengths comparable to the lattice spacing, and it is responsible for transmuting ingoing high Killing frequency modes into low frequency outgoing modes.

Steven Corley; Ted Jacobson

1998-03-26T23:59:59.000Z

123

A Novel Approach to Experimental Studies of Mineral DIsoolution Kinetics  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Novel ApproAch to experimeNtAl Novel ApproAch to experimeNtAl StudieS of miNerAl diSSolutioN KiNeticS Background DOE is conducting pilot CO 2 injection tests to evaluate the concept of geologic sequestration. One strategy that has the potential to enhance CO 2 solubility and reduce the risk of CO 2 leaking back to the surface is dissolution of indigenous minerals in the geological formation and formation of secondary carbonate precipitates. This both increases the brine pH and immobilizes the CO 2 . Clearly, the rates at which these dissolution and precipitation reactions occur directly determine the efficiency of this option. However, one of the fundamental problems in modern geochemistry is the persistent two to five orders of magnitude discrepancy between laboratory-measured and field-derived

124

Experience with minerals recovery from geothermal and other brines  

SciTech Connect (OSTI)

The commercial extraction of minerals from geothermal fluids is not a novelty, although there appear to be no current commercial activities. Products which have been commercially recovered from geothermal fluids include NaC1, CaC1/sub 2/, H/sub 3/BO/sub 3/, and NH/sub 3/. Sites of significant commercial activity include Larderello, Italy and the Imperial Valley in California. Furthermore, a few pilot-plant systems have been tested for this purpose. Commercial recovery from natural non-geothermal brines has a long history, which may have implications for geothermal energy applications. The technical feasibility and economic benefits of large-scale minerals production in conjunction with geothermal energy exploitation remain speculative. In any case, the uncertainties can be resolved only on a site- and product-specific basis.

Crane, C.H.

1982-10-01T23:59:59.000Z

125

Energy and Mineral Development in Indian Country  

Broader source: Energy.gov [DOE]

The Rocky Mountain Mineral Law Foundation is hosting the Special Institute on Energy and Mineral Development in Indian Country. This two-day conference will cover laws, policies, and practices regarding natural resources development in Indian Country and how they've evolved in the recent years.

126

Mineral Soils as Carriers for Rhizobium Inoculants  

Science Journals Connector (OSTI)

...looked healthier and greener than the uninoculated...example, when peat-lime pelleted clover seeds...rhizobia survive better in mineral soil-based inoculant...inoculated plants were greener and looked healthier...ENVIRON. MICROBIOL. MINERAL SOILS AS CARRIERS FOR...

W.-L. Chao; Martin Alexander

1984-01-01T23:59:59.000Z

127

The Crystal Chemistry of Sulfate Minerals  

Science Journals Connector (OSTI)

...arsenate and phosphate minerals, and is the basis of the minerals of the brandtite, Ca2[Mn2+(AsO4)2(H2O)2], talmessite, Ca2[Mg(AsO4)2(H2O)2], and fairfieldite, Ca2[Mn2+ (PO4)2(H2O)2], groups (Hawthorne 1985a). Krausite...

Frank C. Hawthorne; Sergey V. Krivovichev; Peter C. Burns

128

The Crystal Chemistry of the Phosphate Minerals  

Science Journals Connector (OSTI)

...Crystallogr B33:3449-3452 Catti M, Ferraris G, Ivaldi G (1977c) Hydrogen bondng in the crystalline state. Structure of talmessite, Ca2(Mg,Co)(AsO4)2 2H2O, and crystal chemistry of related minerals. Bull Mineral 100:230-236 Catti M, Ferraris...

Danielle M.C. Huminicki; Frank C. Hawthorne

129

Improved process control through real-time measurement of mineral content  

SciTech Connect (OSTI)

In a highly collaborative research and development project with mining and university partners, sensors and data-analysis tools are being developed for rock-mass characterization and real-time measurement of mineral content. Determining mineralogy prior to mucking in an open-pit mine is important for routing the material to the appropriate processing stream. A possible alternative to lab assay of dust and cuttings obtained from drill holes is continuous on-line sampling and real-time x-ray fluorescence (XRF) spectroscopy. Results presented demonstrate that statistical analyses combined with XRF data can be employed to identify minerals and, possibly, different rock types. The objective is to create a detailed three-dimensional mineralogical map in real time that would improve downstream process efficiency.

Turler, Daniel; Karaca, Murat; Davis, William B.; Giauque, Robert D.; Hopkins, Deborah

2001-11-02T23:59:59.000Z

130

Nevada Division of Minerals | Open Energy Information  

Open Energy Info (EERE)

Nevada Division of Minerals Nevada Division of Minerals Jump to: navigation, search Logo: Nevada Division of Minerals Name Nevada Division of Minerals Address 400 W. King St. #106 Place Carson City, Nevada Zip 89703 Website http://minerals.state.nv.us/ Coordinates 39.16409°, -119.7699779° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":39.16409,"lon":-119.7699779,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

131

Fuel Injector Holes  

Broader source: Energy.gov (indexed) [DOE]

cavitation damage in a benchtop rig Quantify change in mass (mass loss) and erosion rate of test coupon as a function of time - Impact of different alloy composition and...

132

Regular Black Hole Metric with Three Constants of Motion  

E-Print Network [OSTI]

According to the no-hair theorem, astrophysical black holes are uniquely characterized by their masses and spins and are described by the Kerr metric. Several parametric spacetimes which deviate from the Kerr metric have been proposed in order to test this theorem with observations of black holes in both the electromagnetic and gravitational-wave spectra. Such metrics often contain naked singularities or closed timelike curves in the vicinity of the compact objects that can limit the applicability of the metrics to compact objects that do not spin rapidly, and generally admit only two constants of motion. The existence of a third constant, however, can facilitate the calculation of observables, because the equations of motion can be written in first-order form. In this paper, I design a Kerr-like black hole metric which is regular everywhere outside of the event horizon, possesses three independent constants of motion, and depends nonlinearly on four free functions that parameterize potential deviations from ...

Johannsen, Tim

2015-01-01T23:59:59.000Z

133

Pseudospin entanglement and Bell test in graphene  

E-Print Network [OSTI]

We propose a way of producing and detecting pseudospin entanglement between electrons and holes in graphene. Electron-hole pairs are produced by a fluctuating potential and their entanglement is demonstrated by a current correlation measurement. The chirality of electrons in graphene facilitates a well-controlled Bell test with (pseudo-)spin projection angles defined in real space.

M. Kindermann

2008-07-01T23:59:59.000Z

134

Mineral associations in coal and their transformation during gasification  

Science Journals Connector (OSTI)

The principle aim of this investigation was to determine the effect that minerals and mineral associations in dense medium coal fractions have on the ash fusion temperature (AFT) of coal, where the mineral matter...

F. B. Waanders; A. Govender

2005-11-01T23:59:59.000Z

135

Documentation and evaluation of Mössbauer data for minerals  

Science Journals Connector (OSTI)

More than 2,500 Mössbauer spectroscopic studies on minerals have been published since 1960. These papers contain approximately 8,000 sets of Mössbauer mineral data on at least 400 different minerals. This info...

John G. Stevens; Airat Khasanov; J. William Miller; Herman Pollak…

136

Test Automation Test Automation  

E-Print Network [OSTI]

Test Automation Test Automation Mohammad Mousavi Eindhoven University of Technology, The Netherlands Software Testing 2013 Mousavi: Test Automation #12;Test Automation Outline Test Automation Mousavi: Test Automation #12;Test Automation Why? Challenges of Manual Testing Test-case design: Choosing inputs

Mousavi, Mohammad

137

Black hole quantum tunnelling and black hole entropy correction  

E-Print Network [OSTI]

Parikh-Wilczek tunnelling framework, which treats Hawking radiation as a tunnelling process, is investigated again. As the first order correction, the log-corrected entropy-area relation naturally emerges in the tunnelling picture if we consider the emission of a spherical shell. The second order correction of the emission rate for the Schwarzschild black hole is calculated too. In this level, the result is still in agreement with the unitary theory, however, the entropy of the black hole will contain three parts: the usual Bekenstein-Hawking entropy, the logarithmic term and the inverse area term. In our results the coefficient of the logarithmic term is -1. Apart from a coefficient, Our correction to the black hole entropy is consistent with that of loop quantum gravity.

Jingyi Zhang

2008-06-15T23:59:59.000Z

138

Hole in the ozone layer?  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Hole in the ozone layer? Hole in the ozone layer? Name: Kelley Location: N/A Country: N/A Date: N/A Question: Is there really a hole in the ozone layer? Replies: That depends on what one means by a "hole". There is a thinning of the layer that is particularly severe during certain seasons at the poles. But the ozone layer is thinning most everywhere. The thinning around the south pole of earth is particularly stunning, and has been referred to as a hole even though some ozone still exists there, it is much less concentrated. As you may know, this ozone destruction is probably due to human release of pollutants such as clorofluorocarbons (CFCs) an due to natural sources such as chemicals from volcanic eruptions. CFCs are used is cooling systems such as refrigerators and air conditioning. There is an international agreement to phase out the use of these destructive chemicals but they won't be banned entirely for years for fears of losing money. Meanwhile the ozone layer thins and we are exposed to increasingly higher doses of cancer causing radiation

139

Synthesis of supported carbon nanotubes in mineralized silica...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

supported carbon nanotubes in mineralized silica-wood composites. Synthesis of supported carbon nanotubes in mineralized silica-wood composites. Abstract: Multiwall carbon...

140

Determining Individual Mineral Contributions To U(VI) Adsorption...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Individual Mineral Contributions To U(VI) Adsorption In A Contaminated Aquifer Sediment: A Fluorescence Spectroscopy Determining Individual Mineral Contributions To U(VI)...

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

V-215: NetworkMiner Directory Traversal and Insecure Library...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

5: NetworkMiner Directory Traversal and Insecure Library Loading Vulnerabilities V-215: NetworkMiner Directory Traversal and Insecure Library Loading Vulnerabilities August 9, 2013...

142

Mineral Recovery Creates Revenue Stream for Geothermal Energy...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Mineral Recovery Creates Revenue Stream for Geothermal Energy Development Mineral Recovery Creates Revenue Stream for Geothermal Energy Development January 21, 2014 - 12:00am...

143

ITP Mining: Mining Industry of the Future Mineral Processing...  

Broader source: Energy.gov (indexed) [DOE]

of the Future Mineral Processing Technology Roadmap ITP Mining: Mining Industry of the Future Mineral Processing Technology Roadmap mptroadmap.pdf More Documents & Publications ITP...

144

Biotic and abiotic pathways of phosphorus cycling in minerals...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and abiotic pathways of phosphorus cycling in minerals and sediments: insights from oxygen isotopes in phosphate. Biotic and abiotic pathways of phosphorus cycling in minerals...

145

Slim Holes At Hawthorne Area (Sabin, Et Al., 2010) | Open Energy  

Open Energy Info (EERE)

Slim Holes At Hawthorne Area (Sabin, Et Al., 2010) Slim Holes At Hawthorne Area (Sabin, Et Al., 2010) Exploration Activity Details Location Hawthorne Area Exploration Technique Slim Holes Activity Date Usefulness useful DOE-funding Unknown Notes GPO drilled two deep, slim geophysical test holes on the western margin of the Hawthorne Army Depot in 2008/2009. These two holes, HWAD 2a and HWAD 3, were drilled on the perceived structural trend of this valley and immediately south and east, respectively, of the El Capitan well. The "El Cap" is a 1,000' well completed by an unsuccessful developer in 1980. The El Cap and several other wells in this region south of Walker Lake have long been admired and even discussed by industry and the military but no sustained exploration or development activities work have ever been

146

Thermal Gradient Holes At Northern Basin & Range Region (Pritchett, 2004) |  

Open Energy Info (EERE)

Gradient Holes At Northern Basin & Range Region (Pritchett, 2004) Gradient Holes At Northern Basin & Range Region (Pritchett, 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Northern Basin & Range Region (Pritchett, 2004) Exploration Activity Details Location Northern Basin and Range Geothermal Region Exploration Technique Thermal Gradient Holes Activity Date Usefulness not useful DOE-funding Unknown Notes NOTE: These are theoretical/computer simulation tests of various methods on eight hypothetical 'model' basing-and-range geothermal systems. "The 300-meter heat flow holes are essentially useless for finding the "hidden" reservoirs. Clearly, the best results are obtained from the SP and MT surveys, with DC resistivity a close third. It is concluded that the best

147

Thermal Gradient Holes At Nw Basin & Range Region (Pritchett, 2004) | Open  

Open Energy Info (EERE)

Thermal Gradient Holes At Nw Basin & Range Region (Pritchett, 2004) Thermal Gradient Holes At Nw Basin & Range Region (Pritchett, 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Nw Basin & Range Region (Pritchett, 2004) Exploration Activity Details Location Northwest Basin and Range Geothermal Region Exploration Technique Thermal Gradient Holes Activity Date Usefulness not useful DOE-funding Unknown Notes NOTE: These are theoretical/computer simulation tests of various methods on eight hypothetical 'model' basing-and-range geothermal systems. "The 300-meter heat flow holes are essentially useless for finding the "hidden" reservoirs. Clearly, the best results are obtained from the SP and MT surveys, with DC resistivity a close third. It is concluded that the best

148

Coherence effects in hole superconductivity  

Science Journals Connector (OSTI)

We discuss the behavior of various observables that depend on matrix elements of operators in the superconducting state within the model of hole superconductivity. In this model, the gap exhibits a linear dependence on the band energy, and the bandwidth depends on the carrier concentration and can become very small for low hole density. We study, in particular, the behavior of ultrasonic attenuation, NMR relaxation rate, and electromagnetic absorption, and present results for parameters expected to be in the range that describes the high-Tc oxides. It is found that the energy dependence of the gap does not give rise to qualitatively different behavior, but significant differences from weak-coupling BCS behavior occur at low hole concentration due to the extreme narrowness of the band.

F. Marsiglio and J. E. Hirsch

1991-12-01T23:59:59.000Z

149

Information loss in black holes  

Science Journals Connector (OSTI)

The question of whether information is lost in black holes is investigated using Euclidean path integrals. The formation and evaporation of black holes is regarded as a scattering problem with all measurements being made at infinity. This seems to be well formulated only in asymptotically AdS spacetimes. The path integral over metrics with trivial topology is unitary and information preserving. On the other hand, the path integral over metrics with nontrivial topologies leads to correlation functions that decay to zero. Thus at late times only the unitary information preserving path integrals over trivial topologies will contribute. Elementary quantum gravity interactions do not lose information or quantum coherence.

S. W. Hawking

2005-10-18T23:59:59.000Z

150

Clay Minerals as Catalysts and Adsorbents  

Science Journals Connector (OSTI)

... largely devoted to a discussion on the use of clay minerals as catalysts and industrial adsorbents ; in the later part of the afternoon some general papers Were also given. ...

D. M. C. MACEWAN

1948-07-31T23:59:59.000Z

151

Sustainable growth and valuation of mineral reserves  

E-Print Network [OSTI]

The annual change in the value of an in-ground mineral is equal to the increase or decrease of inventories ("reserves"), multiplied by the market value of a reserve unit. The limited shrinking resource base does not exist. ...

Adelman, Morris Albert

1994-01-01T23:59:59.000Z

152

Oil, Gas, and Metallic Minerals (Iowa)  

Broader source: Energy.gov [DOE]

Operators of oil, gas, and metallic mineral exploration and production operations are required to obtain a drilling permit from the Iowa Department of Natural Resources and file specific forms with...

153

Engineered yeast for enhanced CO2 mineralization  

E-Print Network [OSTI]

In this work, a biologically catalysed CO2 mineralization process for the capture of CO2 from point sources was designed, constructed at a laboratory scale, and, using standard chemical process scale-up protocols, was ...

Barbero, Roberto Juan

2013-01-01T23:59:59.000Z

154

Mineral Leases by Political Subdivisions (Texas)  

Broader source: Energy.gov [DOE]

This legislation authorizes local political subdivisions to lease lands they own for the development of mineral interests, including coal and lignite. A public hearing process is required prior to...

155

Mineral Springs of Alaska | Open Energy Information  

Open Energy Info (EERE)

search OpenEI Reference LibraryAdd to library Report: Mineral Springs of Alaska Abstract Geologists and engineers of the United States Geological Survey, who for a number...

156

Black hole binary inspiral and trajectory dominance  

E-Print Network [OSTI]

Gravitational waves emitted during the inspiral, plunge and merger of a black hole binary carry linear momentum. This results in an astrophysically important recoil to the final merged black hole, a “kick” that can eject ...

Price, Richard H.

157

Black hole Meissner effect and entanglement  

E-Print Network [OSTI]

Extremal black holes tend to expel magnetic and electric fields. Fields are unable to reach the horizon because the length of the black hole throat blows up in the extremal limit. The length of the throat is related to the ...

Penna, Robert

158

Hawking Emission and Black Hole Thermodynamics  

E-Print Network [OSTI]

A brief review of Hawking radiation and black hole thermodynamics is given, based largely upon hep-th/0409024.

Don N. Page

2006-12-18T23:59:59.000Z

159

Mineral royalties : a preview of the development of Mineral Royalty legislation in South Africa.  

E-Print Network [OSTI]

?? A dynamic shift in the ownership, management and development of the countrys mineral heritage took place after the inauguration of the new political dispensation… (more)

Van der Zwan, Pieter

2010-01-01T23:59:59.000Z

160

High precision, rapid laser hole drilling  

DOE Patents [OSTI]

A laser system produces a first laser beam for rapidly removing the bulk of material in an area to form a ragged hole. The laser system produces a second laser beam for accurately cleaning up the ragged hole so that the final hole has dimensions of high precision.

Chang, Jim J.; Friedman, Herbert W.; Comaskey, Brian J.

2013-04-02T23:59:59.000Z

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Time (hole?) machines John Byron Manchak  

E-Print Network [OSTI]

Time (hole?) machines John Byron Manchak Department of Philosophy, University of Washington, Box machines Hole machines Time travel General relativity a b s t r a c t Within the context of general relativity, we consider a type of "time machine" and introduce the related "hole machine". We review what

Manchak, John

162

Absorption cross section in Lifshitz black hole  

E-Print Network [OSTI]

We derive the absorption cross section of a minimally coupled scalar in the Lifshitz black hole obtained from the new massive gravity. The absorption cross section reduces to the horizon area in the low energy and massless limit of s-wave mode propagation, indicating that the Lifshitz black hole also satisfies the universality of low energy absorption cross section for black holes.

Taeyoon Moon; Yun Soo Myung

2012-05-10T23:59:59.000Z

163

Signatures of black holes at the LHC  

E-Print Network [OSTI]

Signatures of black hole events at CERN's Large Hadron Collider are discussed. Event simulations are carried out with the Fortran Monte Carlo generator CATFISH. Inelasticity effects, exact field emissivities, color and charge conservation, corrections to semiclassical black hole evaporation, gravitational energy loss at formation and possibility of a black hole remnant are included in the analysis.

Marco Cavaglia; Romulus Godang; Lucien M. Cremaldi; Donald J. Summers

2007-07-02T23:59:59.000Z

164

Study of catalytic effects of mineral matter level on coal reactivity  

SciTech Connect (OSTI)

Coal liquefaction experiments using a 400-lb/day bubble-column reactor tested the catalytic effects of added mineral matter level on coal conversion, desulfurization, and distillate yields in continuous operation under recycle conditions, with specific emphasis on the use of a disposable pyrite catalyst indigenous to the feed coal. Western Kentucky No. 11 run-of-mine (ROM) and washed coals were used as feedstocks to determine the effects of levels of mineral matter, specifically iron compounds. Liquefaction reactivity as characterized by total distillate yield was lower for washed coal, which contained less mineral matter. Liquefaction reactivity was regained when pyrite concentrate was added as a disposable catalyst to the washed coal feed in sufficient quantity to match the feed iron concentration of the run-of-mine coal liquefaction test run.

Mazzocco, Nestor J.; Klunder, Edgar B.; Krastman, Donald

1981-03-01T23:59:59.000Z

165

Low-Temperature Mineral Recovery Program FOA Selections  

Broader source: Energy.gov [DOE]

Energy Department's geothermal technologies office awarded nine projects in low-temperature and mineral recovery.

166

Slim Holes At Alvord Hot Springs Area (Combs, Et Al., 1999) | Open Energy  

Open Energy Info (EERE)

Combs, Et Al., 1999) Combs, Et Al., 1999) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Slim Holes At Alvord Hot Springs Area (Combs, Et Al., 1999) Exploration Activity Details Location Alvord Hot Springs Area Exploration Technique Slim Holes Activity Date Usefulness not indicated DOE-funding Unknown Notes Anadarko Petroleum Corporation drilled two slimhole discoveries in the 1980s, one at Salt Wells, NV, and the other at Pueblo Valley, OR. Both of these slimholes were hot enough to discharge unassisted and were successfully flow tested. A slimhole at Pueblo Valley, in south-east Oregon was planned and permitted as a test well to evaluate an interval of fractured basalt which had been discovered while drilling an earlier thermal-gradient hole. Using a UDR1500 rig, the hole was rotary-drilled to

167

Mining and Minerals Policy Act of 1970 | Open Energy Information  

Open Energy Info (EERE)

and Minerals Policy Act of 1970 and Minerals Policy Act of 1970 Jump to: navigation, search Statute Name Mining and Minerals Policy Act of 1970 Year 1970 Url Actof1970.jpg Description An amendment to the Mineral Leasing Act References Mining and Minerals Policy Act of 1970[1] The Mining and Minerals Policy Act of 1970 (30 U.S.C. § 21 et seq.) - An amendment to the Mineral Leasing Act, this statute encompasses both hard rock mining and oil and gas and established modern federal policy regarding mineral resources in the United States. The Act articulates a national interest to foster and encourage private enterprise while mitigating adverse environmental impacts. References ↑ "Mining and Minerals Policy Act of 1970" Retrieved from "http://en.openei.org/w/index.php?title=Mining_and_Minerals_Policy_Act_of_1970&oldid=334610"

168

Yemen Ministry of Oil and Minerals | Open Energy Information  

Open Energy Info (EERE)

Yemen Ministry of Oil and Minerals Yemen Ministry of Oil and Minerals Jump to: navigation, search Logo: Yemen Ministry of Oil and Minerals Country Yemen Name Yemen Ministry of Oil and Minerals Website http://www.mom.gov.ye/en/ References Yemen Ministry of Oil and Minerals Website[1] The Yemen Ministry of Oil and Minerals Website contains some content in English. Associated Organizations Yemeni Company for Oil-Product Distribution Petroleum Exploration and Production Authority Safr Company for Scouting Production Operations Organization of Oil Scouting Aden Refinery Company Yemen Company for Oil Refining Yemen Investments Company for Oil & Mineral Geological Land Survey & Mineral Wealth Organization References ↑ "Yemen Ministry of Oil and Minerals Website" Retrieved from "http://en.openei.org/w/index.php?title=Yemen_Ministry_of_Oil_and_Minerals&oldid=334954"

169

One Weird Trick to Stop Selfish Miners: Fresh Bitcoins, A Solution for the Honest Miner.  

E-Print Network [OSTI]

One Weird Trick to Stop Selfish Miners: Fresh Bitcoins, A Solution for the Honest Miner. Ethan Heilman Boston University heilman@bu.edu Abstract--A recent result in Bitcoin is the selfish mining incentive-compatible and harmful to Bitcoin. In this paper we introduce a new defense against selfish mining

170

Sustainable Water Management in the Minerals Industry 1 SUSTAINABLE WATER MANAGEMENT IN THE MINERALS  

E-Print Network [OSTI]

Sustainable Water Management in the Minerals Industry 1 SUSTAINABLE WATER MANAGEMENT IN THE MINERALS INDUSTRY Bill Whiten1, Mark McGuinness2, Sayed Hoseini3 The problem of managing a storage dam interest. It arises in the provision of water for Queensland coal mines, where additional water

McGuinness, Mark

171

Supermassive black holes from supermassive stars  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Supermassive black holes from supermassive stars Supermassive black holes from supermassive stars 1663 Los Alamos science and technology magazine Latest Issue:November 2013 All Issues » submit Supermassive black holes from supermassive stars Supermassive stars in the early universe gave supermassive black holes a head start March 25, 2013 simulations suggest that star formation conditions back then allowed the first stars to become supermassive themselves In this simulation, a black hole that was just formed by the collapse of a supermassive star is surrounded by a distribution of gas (color indicates density). Because the black hole (located at the center but too small to see) grows by consuming the available gas, simulations like this one help determine how quickly the black hole can grow. The progenitor of this black

172

Primordial black holes from temporally enhanced curvature perturbation  

E-Print Network [OSTI]

Scalar field with generalized kinetic interactions metamorphoses depending on its field value, ranging from cosmological constant to stiff matter. We show that such a scalar field can give rise to temporal enhancement of the curvature perturbation in the primordial Universe, leading to efficient production of primordial black holes while the enhancement persists. If the inflation energy scale is high, those mini-black holes evaporate by the Hawking radiation much before Big Bang nucleosynthesis and the effective reheating of the Universe is achieved by the black hole evaporation. Dominance of PBHs and the reheating by their evaporation modify the expansion history of the primordial Universe. This results in a characteristic feature of the spectrum of primordial tensor modes in the DECIGO frequency band, opening an interesting possibility of testing PBH reheating scenario by measuring the primordial tensor modes. If the inflation energy scale is low, the PBH mass can be much larger than the solar mass. In this case, PBH is an interesting candidate for seeds for supermassive black holes residing in present galaxies.

Teruaki Suyama; Yi-Peng Wu; Jun'ichi Yokoyama

2014-06-02T23:59:59.000Z

173

Tips for implementing multigrid methods on domains containing holes  

E-Print Network [OSTI]

As part of our development of a computer code to perform 3D `constrained evolution' of Einstein's equations in 3+1 form, we discuss issues regarding the efficient solution of elliptic equations on domains containing holes (i.e., excised regions), via the multigrid method. We consider as a test case the Poisson equation with a nonlinear term added, as a means of illustrating the principles involved, and move to a "real world" 3-dimensional problem which is the solution of the conformally flat Hamiltonian constraint with Dirichlet and Robin boundary conditions. Using our vertex-centered multigrid code, we demonstrate globally second-order-accurate solutions of elliptic equations over domains containing holes, in two and three spatial dimensions. Keys to the success of this method are the choice of the restriction operator near the holes and definition of the location of the inner boundary. In some cases (e.g. two holes in two dimensions), more and more smoothing may be required as the mesh spacing decreases to zero; however for the resolutions currently of interest to many numerical relativists, it is feasible to maintain second order convergence by concentrating smoothing (spatially) where it is needed most. This paper, and our publicly available source code, are intended to serve as semi-pedagogical guides for those who may wish to implement similar schemes.

Scott H. Hawley; Richard A. Matzner

2003-11-18T23:59:59.000Z

174

Mineral and Fuel Extraction: Health Consequences  

Science Journals Connector (OSTI)

Activities associated with mining and fuel extraction may present a range of potential health risks for nearby communities. The environmental legacy of mining and fuel extraction is extensive, with millions of active and abandoned mines globally. Evaluation of community risks from mineral and fuel extraction is often a complex task, given the variety of products produced, multiple potential exposure contexts, routes of contact, and health impacts. Adverse health outcomes that may arise from mineral-related processes include release of toxicants such as metals, metalloids, and mineral dusts, and indirect effects such as the increased potential of vectorborne disease. The ongoing processing and end-use of minerals also produce gas emissions (such as carbon dioxide and sulfur dioxide), often on a large scale. Polycyclic aromatic hydrocarbons (PAHs) are substances of particular concern arising from conventional crude oil and coal extraction, oil sands/shales wastes, and tailings water, and are classified as either proven or suspected carcinogens. The geotechnical and structural aspects of mine sites must also be considered, including the risk of major hazardous events such as release of tailings dam contents. Indirect or delayed effects of mineral and fuel extraction include those that act to affect community health through contamination or disruption of water supplies and food sources (e.g., crops). As with many industries, the balance between risks and benefits of mining must be carefully calibrated.

A. Cook; R.B. Finkelman; A. Fourie

2011-01-01T23:59:59.000Z

175

King Fahd University of Petroleum & Minerals College of Computer Sciences and Engineering  

E-Print Network [OSTI]

Program Goal Our goal has been, and continues to be, a high quality degree program in Software Engineering quality engineer, software developer, software test engineer, or software engineering project manager King Fahd University of Petroleum & Minerals College of Computer Sciences and Engineering

El-Alfy, El-Sayed

176

Linking bacteria-metal interactions to mineral attachment: A role for outer sphere complexation of cations?  

E-Print Network [OSTI]

, we tested whether alteration of bacterial cell wall electrical field via outer sphere complexation mineral phases, protection from predation via biofilm formation, and communalism among various microbial in groundwater systems and the role of bacteria in weathering and diagenetic proc- esses we must first quantify

Roberts, Jennifer A.

177

Accelerating and rotating black holes  

E-Print Network [OSTI]

An exact solution of Einstein's equations which represents a pair of accelerating and rotating black holes (a generalised form of the spinning C-metric) is presented. The starting point is a form of the Plebanski-Demianski metric which, in addition to the usual parameters, explicitly includes parameters which describe the acceleration and angular velocity of the sources. This is transformed to a form which explicitly contains the known special cases for either rotating or accelerating black holes. Electromagnetic charges and a NUT parameter are included, the relation between the NUT parameter $l$ and the Plebanski-Demianski parameter $n$ is given, and the physical meaning of all parameters is clarified. The possibility of finding an accelerating NUT solution is also discussed.

J. B. Griffiths; J. Podolsky

2005-07-06T23:59:59.000Z

178

Black Holes at the LHC  

E-Print Network [OSTI]

In these two lectures, we will address the topic of the creation of small black holes during particle collisions in a ground-based accelerator, such as LHC, in the context of a higher-dimensional theory. We will cover the main assumptions, criteria and estimates for their creation, and we will discuss their properties after their formation. The most important observable effect associated with their creation is likely to be the emission of Hawking radiation during their evaporation process. After presenting the mathematical formalism for its study, we will review the current results for the emission of particles both on the brane and in the bulk. We will finish with a discussion of the methodology that will be used to study these spectra, and the observable signatures that will help us identify the black-hole events.

Panagiota Kanti

2008-02-15T23:59:59.000Z

179

CO2 Mineral Sequestration Studies in US  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Mineral Sequestration Studies in US Mineral Sequestration Studies in US Philip Goldberg 1 , Zhong-Ying Chen 2 , William O'Connor 3 , Richard Walters 3 , and Hans Ziock 4 1 National Energy Technology Laboratory, P.O. Box 10940, Pittsburgh, PA 15236, goldberg@netl.doe.gov, (412)386-5806 2 Science Applications International Corporation, 1710 Goodridge Dr. McLean, VA, zhong- ying.chen@saic.com, (703)676-7328 3 Albany Research Center, Albany, OR oconner@arc.doe.gov, walters@alrc.doe, (541)967-5834 4 Los Alamos National Laboratory, Los Alamos, NM, ksl@lanl.gov, ziock@lanl.gov, (505)667- 7265 Abstract Carbon sequestration by reacting naturally occurring Mg and Ca containing minerals with CO 2 to form carbonates has many unique advantages. Most notably is the fact that carbonates have a lower energy state than CO

180

Down hole periodic seismic generator  

DOE Patents [OSTI]

A down hole periodic seismic generator system for transmitting variable frequency, predominantly shear-wave vibration into earth strata surrounding a borehole. The system comprises a unitary housing operably connected to a well head by support and electrical cabling and contains clamping apparatus for selectively clamping the housing to the walls of the borehole. The system further comprises a variable speed pneumatic oscillator and a self-contained pneumatic reservoir for producing a frequency-swept seismic output over a discrete frequency range.

Hardee, Harry C. (Albuquerque, NM); Hills, Richard G. (Las Cruces, NM); Striker, Richard P. (Albuquerque, NM)

1989-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Primordial black hole minimum mass  

SciTech Connect (OSTI)

In this paper we revisit thermodynamic constraints on primordial black hole (PBH) formation in the early universe. Under the assumption that PBH mass is equal to the cosmological horizon mass, one can use the 2nd Law of Thermodynamics to put a lower limit on the PBH mass. In models of PBH formation, however, PBHs are created at some fraction of the horizon mass. We show that this thermodynamic constraint still holds for subhorizon PBH formation.

Chisholm, James R. [Institute for Fundamental Theory, University of Florida, Gainesville, Florida 32611-8440 (United States)

2006-08-15T23:59:59.000Z

182

Black Hole Thermodynamics and Electromagnetism  

E-Print Network [OSTI]

We show a strong parallel between the Hawking, Beckenstein black hole Thermodynamics and electromagnetism: When the gravitational coupling constant transform into the electromagnetic coupling constant, the Schwarzchild radius, the Beckenstein temperature, the Beckenstein decay time and the Planck mass transform to respectively the Compton wavelength, the Hagedorn temperature, the Compton time and a typical elementary particle mass. The reasons underlying this parallalism are then discussed in detail.

Burra G. Sidharth

2005-07-15T23:59:59.000Z

183

Quantum Geometry and Black Holes  

E-Print Network [OSTI]

We present an overall picture of the advances in the description of black hole physics from the perspective of loop quantum gravity. After an introduction that discusses the main conceptual issues we present some details about the classical and quantum geometry of isolated horizons and their quantum geometry and then use this scheme to give a natural definition of the entropy of black holes. The entropy computations can be neatly expressed in the form of combinatorial problems solvable with the help of methods based on number theory and the use of generating functions. The recovery of the Bekenstein-Hawking law and corrections to it is explained in some detail. After this, due attention is paid to the discussion of semiclassical issues. An important point in this respect is the proper interpretation of the horizon area as the energy that should appear in the statistical-mechanical treatment of the black hole model presented here. The chapter ends with a comparison between the microscopic and semiclassical app...

G., J Fernando Barbero

2015-01-01T23:59:59.000Z

184

Entanglement entropy of black holes  

E-Print Network [OSTI]

The entanglement entropy is a fundamental quantity which characterizes the correlations between sub-systems in a larger quantum-mechanical system. For two sub-systems separated by a surface the entanglement entropy is proportional to the area of the surface and depends on the UV cutoff which regulates the short-distance correlations. The geometrical nature of the entanglement entropy calculation is particularly intriguing when applied to black holes when the entangling surface is the black hole horizon. I review a variety of aspects of this calculation: the useful mathematical tools such as the geometry of spaces with conical singularities and the heat kernel method, the UV divergences in the entropy and their renormalization, the logarithmic terms in the entanglement entropy in 4 and 6 dimensions and their relation to the conformal anomalies. The focus in the review is on the systematic use of the conical singularity method. The relations to other known approaches such as 't Hooft's brick wall model and the Euclidean path integral in the optical metric are discussed in detail. The puzzling behavior of the entanglement entropy due to fields which non-minimally couple to gravity is emphasized. The holographic description of the entanglement entropy of the black hole horizon is illustrated on the two- and four-dimensional examples. Finally, I examine the possibility to interpret the Bekenstein-Hawking entropy entirely as the entanglement entropy.

Sergey N. Solodukhin

2011-04-19T23:59:59.000Z

185

Fixation of Radionuclides in Soil and Minerals by Heating  

Science Journals Connector (OSTI)

Four mineral materials (a quartz sand, a feldspar sand, a calcitic limestone, and one soil from the DOE Hanford reservation (see Supporting Information, Table SI-1, for elemental compositions and descriptions)) were investigated after spiking with one of four radionuclides (85Sr, 134Cs, 57Co, and depleted U); leachability tests of these spiked materials were performed after thermal treatments up to 1200 °C using the detailed 15-step sequential extraction protocol (18). ... Previously, a similar relationship was observed following heating of naturally 90Sr -contaminated field soil from the Department of Energy's Oak Ridge Reservation within a similar range of submelting tempera tures (15) which observations were merely documented in this obscure programmatic report because we were unaware, at the time, of any mechanistic interpretation for the effect and failed to recognize its now clear implication for remediation technology; those observations (reproduced in the Supporting Information, Figure SI-31) should allay skeptical concerns that the immobilization effects reported herein result from some artifact of the isotopic spiking technique or sample preparations. ... Detailed descriptions of the gamma spectroscopic assay techniques and the sequential extraction procedures along with the elemental analyses of the mineral materials (Table SI-1) used throughout this investigation; sequential extraction graphs for 134Cs, 85Sr, 57Co, and U from quartz, feldspar, calcite, and the Hanford soil (Figures SI-1 through SI-16); preheating and reheating extraction results for 134Cs, 85Sr, and 57Co from the Hanford soil (Figures SI-17?SI-19); sequential extraction results for intermediate temperature treatments for all four isotopes in the Hanford soil (Figures SI-20?SI-23); sequential extract pHs for quartz, feldspar, limestone, and Hanford soil (Figures SI-24?SI-27); mineral weight retention after extrac tions (Table SI-2), radioisotope distribution following preheating and reheating of Hanford soil (Table SI-3), sequential extraction summaries (Table SI-4 and SI-5), and 90Sr leach ability from Oak Ridge soil following thermal treatment (Figure SI-28). ...

Brian P. Spalding

2001-10-05T23:59:59.000Z

186

Laboratory testing and modeling to evaluate perfluorocarbon compounds as tracers in geothermal systems  

SciTech Connect (OSTI)

The thermal stability and adsorption characteristics of three perfluorinated hydrocarbon compounds were evaluated under geothermal conditions to determine the potential to use these compounds as conservative or thermally-degrading tracers in Engineered (or Enhanced) Geothermal Systems (EGS). The three compounds tested were perfluorodimethyl-cyclobutane (PDCB), perfluoromethylcyclohexane (PMCH), and perfluorotrimethylcyclohexane (PTCH), which are collectively referred to as perfluorinated tracers, or PFTs. Two sets of duplicate tests were conducted in batch mode in gold-bag reactors, with one pair of reactors charged with a synthetic geothermal brine containing the PFTs and a second pair was charged with the brine-PFT mixture plus a mineral assemblage chosen to be representative of activated fractures in an EGS reservoir. A fifth reactor was charged with deionized water containing the three PFTs. The experiments were conducted at {approx}100 bar, with temperatures ranging from 230 C to 300 C. Semi-analytical and numerical modeling was also conducted to show how the PFTs could be used in conjunction with other tracers to interrogate surface area to volume ratios and temperature profiles in EGS reservoirs. Both single-well and cross-hole tracer tests are simulated to illustrate how different suites of tracers could be used to accomplish these objectives. The single-well tests are especially attractive for EGS applications because they allow the effectiveness of a stimulation to be evaluated without drilling a second well.

Reimus, Paul W [Los Alamos National Laboratory

2011-01-21T23:59:59.000Z

187

Colorful quantum black holes at the LHC  

E-Print Network [OSTI]

We examine the LHC phenomenology of quantum black holes in models of TeV gravity. By quantum black holes we mean black holes of the smallest masses and entropies, far from the semiclassical regime. These black holes are formed and decay over short distances, and typically carry SU(3) color charges inherited from their parton progenitors. Based on a few minimal assumptions, such as gauge invariance, we identify interesting signatures for quantum black hole decay such as 2 jets, jet + hard photon, jet + missing energy and jet + charged lepton, which should be readily visible above background. The detailed phenomenology depends heavily on whether one requires a Lorentz invariant, low-energy effective field theory description of black hole processes.

Xavier Calmet; Wei Gong; Stephen D. H. Hsu

2008-06-27T23:59:59.000Z

188

Property:MineralManager | Open Energy Information  

Open Energy Info (EERE)

MineralManager MineralManager Jump to: navigation, search Property Name MineralManager Property Type Page Pages using the property "MineralManager" Showing 25 pages using this property. (previous 25) (next 25) B BLM-NV-WN-ES-08-01-1310, NV-020-08-01 + BLM + C CA-017-05-051 + BLM + CA-170-02-15 + BLM + CA-650-2005-086 + BLM + CA-670-2010-107 + BLM + CA-670-2010-CX + BLM + D DOE-EA-1733 + California + DOE-EA-1759 + Naknek Electric Association + DOE-EA-1849 + BLM + DOE-EIS-0298 + BLM + DOI-BLM-CA-C050-2009-0005-EA + BLM + DOI-BLM-CA-EA-2002-??? + BLM + DOI-BLM-CA-ES-2013-002+1793-EIS + BLM +, BLM + DOI-BLM-ID-220-2009-EA-3709 + BLM + DOI-BLM-ID-B010-2010-0083-CX + BLM + DOI-BLM-ID-I020-2012-0017-CX + BLM + DOI-BLM-ID-T020-2012-0003-CX + BLM + DOI-BLM-NM-L000-2012-0020-DNA + BLM +

189

Minerals Extraction and Processing: New Developments  

Science Journals Connector (OSTI)

...Department of the Interior, Salt Lake City, Utah. Before his...Department of the Interior, Salt Lake City, Utah. Before his...minerals are the solution mining of salt (31) and potash (32), the...by in-place leaching at its Palangana Dome property in Duval County...

Joe B. Rosenbaum

1976-02-20T23:59:59.000Z

190

The world supply/demand outlook for minerals  

Science Journals Connector (OSTI)

Mining and agriculture are the fundamental industries that convert natural resources into useable forms. Mining and modern agriculture are inextricably interlinked because modern agriculture is heavily dependent upon the use of machinery power and fertilizers ? all of which are mineral based products and in some applications mineral and agricultural products are mutually substitutable. Steel production is common denominator for assessing demand for many minerals and in the last 2–1/2 decades world steel production has grown at an annual rate of about 5–1/2%. Currently the United States uses about 4 billion tons ? 40 000 pounds per person ? of new mineral supplies each year about equally divided between the mineral fuels and other mineral materials. The value of energy and processed materials of mineral origin used in the U.S. is estimated to exceed $270 billion per year. Rising world population coupled with aspirations for higher living standards points to steadily increasing world demand for mineral materials. Studies by the U.S. Bureau of Mines show that the ratio of recoverable world mineral reserves to cumulate demand over the next few decades is satisfactory for most mineral materials. However if world mineral production is to keep pace with demand there must be increased efforts to find mine beneficiate process and recycle mineral materials and there must also exist politico?economic climates that encourage long?term mineral development while also making appropriate provisions for humanitarian and envronmental concerns.

John D. Morgan Jr.

1976-01-01T23:59:59.000Z

191

Spinning Black Holes as Particle Accelerators  

Science Journals Connector (OSTI)

It has recently been pointed out that particles falling freely from rest at infinity outside a Kerr black hole can in principle collide with an arbitrarily high center of mass energy in the limiting case of maximal black hole spin. Here we aim to elucidate the mechanism for this fascinating result, and to point out its practical limitations, which imply that ultraenergetic collisions cannot occur near black holes in nature.

Ted Jacobson and Thomas P. Sotiriou

2010-01-14T23:59:59.000Z

192

Black hole entropy: inside or out?  

E-Print Network [OSTI]

A trialogue. Ted, Don, and Carlo consider the nature of black hole entropy. Ted and Carlo support the idea that this entropy measures in some sense ``the number of black hole microstates that can communicate with the outside world.'' Don is critical of this approach, and discussion ensues, focusing on the question of whether the first law of black hole thermodynamics can be understood from a statistical mechanics point of view.

Ted Jacobson; Donald Marolf; Carlo Rovelli

2005-01-14T23:59:59.000Z

193

Interaction of fermions with black holes  

SciTech Connect (OSTI)

Bekenstein and Meisels used statistical thermodynamic arguments to obtain the probability distribution of fermions emitted by a black hole when a fermion is incident. In contrast with Bekenstein and Meisels, we model the black hole as a perfect blackbody surrounded by a mirror. Our probability distribution for emitted fermions agrees with the probability distribution of Bekenstein and Meisels, but the interpretation of how fermions interact with the black hole is different from the interpreteation given by Bekenstein and Meisels.

Jones T.O. III

1986-04-15T23:59:59.000Z

194

Electromagnetic Beams Overpass the Black Hole Horizon  

E-Print Network [OSTI]

We show that the electromagnetic excitations of the Kerr black hole have very strong back reaction on metric. In particular, the electromagnetic excitations aligned with the Kerr congruence form the light-like beams which overcome horizon, forming the holes in it, which allows matter to escape interior. So, there is no information lost inside the black hole. This effect is based exclusively on the analyticity of the algebraically special solutions.

Alexander Burinskii

2008-06-16T23:59:59.000Z

195

Absorption cross section of RN black hole  

E-Print Network [OSTI]

The behavior of a charged scalar field in the RN black hole space time is studied using WKB approximation. In the present work it is assumed that matter waves can get reflected from the event horizon. Using this effect, the Hawking temperature and the absorption cross section for RN black hole placed in a charged scalar field are calculated. The absorption cross section $\\sigma _{abs}$ is found to be inversely proportional to square of the Hawking temperature of the black hole.

Sini R.; V. C. Kuriakose

2007-08-23T23:59:59.000Z

196

Thermal Gradient Holes At Lightning Dock Area (Warpinski, Et Al., 2004) |  

Open Energy Info (EERE)

Thermal Gradient Holes At Lightning Dock Area Thermal Gradient Holes At Lightning Dock Area (Warpinski, Et Al., 2004) Exploration Activity Details Location Lightning Dock Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness not indicated DOE-funding Unknown Notes The awardee conducted seismic, gravity, resistivity, and airborne magnetic surveys, drilled temperature-gradient wells, and selected a location for a test well (52-7). The test well was drilled to a total depth of 770 m during 2003. Maximum temperatures approached 140degrees C and a short flow test suggested that a production well could be drilled to 600 m and produce economic volumes of 130-140degrees C fluid. A final assessment of the resource is currently being performed. References N. R. Warpinski, A. R. Sattler, R. Fortuna, D. A. Sanchez, J.

197

Heat Flow From Four New Research Drill Holes In The Western Cascades,  

Open Energy Info (EERE)

From Four New Research Drill Holes In The Western Cascades, From Four New Research Drill Holes In The Western Cascades, Oregon, Usa Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Heat Flow From Four New Research Drill Holes In The Western Cascades, Oregon, Usa Details Activities (1) Areas (1) Regions (0) Abstract: Conceptual models of the thermal structure of the Oregon Cascade Range propose either (1) a narrow zone of magmatic heat sources, flanked by shallow heat-flow anomalies caused by lateral ground-water flow; or (2) a wide zone of magmatic heat sources, with localized, generally negligible ground-water effects. The proposed narrow heat source coincides with the Quaternary volcanic arc, whereas the wider heat source would extend 10-30 km west of the arc. To test the models, four new heat-flow holes were sited

198

Absorption Effects due to Spin in the Worldline Approach to Black Hole Dynamics  

E-Print Network [OSTI]

We generalize the effective point particle approach to black hole dynamics to include spin. In this approach dissipative effects are captured by degrees of freedom localized on the wordline. The absorptive properties of the black hole are determined by correlation functions which can be matched with the graviton absorption cross section in the long wavelength approximation. For rotating black holes, superradiance is responsible for the leading contribution. The effective theory is then used to predict the power loss due to spin in the dynamics of non-relativistic binary systems. An enhancement of three powers of the relative velocity is found with respect to the non-rotating case. Then we generalize the results to other type of constituents in the binary system, such as rotating neutron stars. Finally we compute the power loss absorbed by a test spinning black hole in a given spacetime background.

Rafael A. Porto

2007-10-26T23:59:59.000Z

199

Operations plan Coso geothermal exploratory hole No. 1 (CGEH-1) | Open  

Open Energy Info (EERE)

plan Coso geothermal exploratory hole No. 1 (CGEH-1) plan Coso geothermal exploratory hole No. 1 (CGEH-1) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Operations plan Coso geothermal exploratory hole No. 1 (CGEH-1) Details Activities (1) Areas (1) Regions (0) Abstract: An investigative program is described, involving the drilling and testing of an exploratory hole to a nominal depth of 4,000 feet with an option to drill to a depth of 6,000 feet. The following are covered: management and organizational concept; program elements--description, detailed drilling program; materials, services, and equipment provided by ERDA, NWC; site selection; site access and security; health and safety; permits and approvals; reporting; environmental impact; funding; schedule of activities; and public information. The license and reporting forms are

200

Effect of the bioemulsifier emulsan on naphthalene mineralization from coal tar in aqueous systems  

SciTech Connect (OSTI)

Coal tar in aerobic aqueous systems was treated with purified emulsan, the anionic heteropolysaccharide bioemulsifier produced by Acinetobacter calcoaceticus RAG-1; with inocula of various concentrations of stationary phase RAG-1 cells; or with cell-free broth from stationary phase RAG-1 cultures. Naphthalene mineralization by a mixed PAH-degrading population was measured by recovering {sup 14}CO{sub 2} evolved during biotransformation of the [{sup 14}C]naphthalene-labeled coal tar. There was no evidence of naphthalene mineralization by RAG- 1 cells alone. The addition of emulsan, RAG-1 inocula, or cell-free broth to systems containing the PAH-degrading population did not significantly affect naphthalene mineralization in any of the systems tested. Coal tar in these experiments was present either as a free dense nonaqueous phase liquid (DNAPL), or as DNAPL imbibed into microporous silica particles. Emulsification of the tar was not observed in either case. The presence or absence of microporous silica did not affect the extent or rate of naphthalene mineralization, nor did the concentration of RAG-1 inocula or the amount of broth added. The addition of cell-free broth, emulsan, or RAG-1 cells late in the experiments did not yield significantly different results compared to initial addition of these substances. Thus, emulsan and related fractions from RAG-1 cultures were ineffective in altering naphthalene mineralization in this study.

Skubal, K.L.; Luthy, R.G.

1994-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Thermodynamics of dilaton-axion black holes  

SciTech Connect (OSTI)

Considering a generalized action for the Einstein-Maxwell theory in four dimensions coupled to scalar and pseudoscalar fields, the thermodynamic properties of asymptotically flat black hole solutions in such a background are investigated. Bekenstein-Hawking area-entropy law is verified for these class of black holes. From the property of specific heat, it is shown that such black holes can be stable for a certain choice of the parameters like charge, mass, and the scalar vacuum expectation value. The possibility of a black hole phase transition is discussed in this context.

Ghosh, Tanwi; SenGupta, Soumitra [Department of Theoretical Physics, Indian Association for the Cultivation of Science, Jadavpur, Calcutta-700 032 (India)

2008-12-15T23:59:59.000Z

202

Black Holes: from Speculations to Observations  

E-Print Network [OSTI]

This paper provides a brief review of the history of our understanding and knowledge of black holes. Starting with early speculations on ``dark stars'' I discuss the Schwarzschild "black hole" solution to Einstein's field equations and the development of its interpretation from "physically meaningless" to describing the perhaps most exotic and yet "most perfect" macroscopic object in the universe. I describe different astrophysical black hole populations and discuss some of their observational evidence. Finally I close by speculating about future observations of black holes with the new generation of gravitational wave detectors.

Thomas W. Baumgarte

2006-04-13T23:59:59.000Z

203

POLCAL-A gas suspension calciner for pyroprocessing of minerals  

Science Journals Connector (OSTI)

ABSTRACT The POLCAL(R) suspension calciner consists of several vertically arranged cyclones, connected by gas and material ducts. Fine-grained solids can be thermally treated in this system with a comparatively low energy input. A small proportion of the necessary amount of fuel is burned in a combustion chamber, while the greater part of the fuel is directly injected into the calciner. The fuel can be liquid or gaseous and, under certain conditions, even solid. Two industrial plants for the calcination of magnesite and a pasty filter cake from a precipitation process have been in operation for several years. One plant will shortly be commissioned and two further systems are being designed. Due to the effective heat exchange, the POLCAL system distinguishes itself by a low energy consumption. The simple design and the absence of rotating parts minimise the susceptibility to malfunctions and considerably reduce maintenance and repair costs. Due to the small amounts of material in the system, the change-over times to other product qualities and the start-up time after a shutdown of the system are short. The POLCAL system competes with multiple hearth furnaces, rotary kilns and fluidised bed kilns and lends itself to use in many branches of industry where minerals or intermediate products from other stages of the process must be calcined. KEYWORDS Calcination of minerals and precipitation products; low energy consumption; homogeneous product quality; operating industrial plants; pilot-scale tests with various materials.

P.W. Böhm

1988-01-01T23:59:59.000Z

204

Mineral Recovery Creates Revenue Stream for Geothermal Energy Development  

Broader source: Energy.gov [DOE]

Find out more about Notice to Issue Financial Opportunity Announcement on "Low-Temperature Mineral Recovery Program," a targeted GTO initiative focused on strategic mineral extraction as a path to optimize the value stream of low-to-moderate-tempe

205

Locking Information in Black Holes  

Science Journals Connector (OSTI)

We show that a central presumption in the debate over black-hole information loss is incorrect. Ensuring that information not escape during evaporation does not require that it all remain trapped until the final stage of the process. Using the recent quantum information-theoretic result of locking, we show that the amount of information that must remain can be very small, even as the amount already radiated is negligible. Information need not be additive: A small system can lock a large amount of information, making it inaccessible. Only if the set of initial states is restricted can information leak.

John A. Smolin and Jonathan Oppenheim

2006-02-28T23:59:59.000Z

206

Carbon Sequestration via Mineral Carbonation: Overview and Assessment  

E-Print Network [OSTI]

1 Carbon Sequestration via Mineral Carbonation: Overview and Assessment 14 March 2002 Howard Herzog overview and assessment of carbon sequestration by mineral carbonation (referred to as "mineral sequestration R&D. The first is that carbonates have a lower energy state than CO2. Therefore, at least

207

SKARN GOLD MINERALIZATION AT THE GEODO MINE, SOUTH KOREA  

Science Journals Connector (OSTI)

...Communications SKARN GOLD MINERALIZATION AT THE GEODO MINE, SOUTH KOREA Eui-Jun Kim 1 Maeng-Eon Park 2 Noel C. White 3 Corresponding...Skarn gold mineralization at the Geodo Mine, South Korea Kim Eui-Jun Author Korea Institute of Geoscience and Mineral Resources...

Eui-Jun Kim; Maeng-Eon Park; Noel C. White

208

Manganese oxide minerals: Crystal structures and economic and environmental significance  

Science Journals Connector (OSTI)

...ability to remove the green tint imparted by iron...are the predominant ore minerals in most of today’s commercially...as coatings on other mineral grains. Mn is highly...pH, organic matter, lime, and phosphate on heavy...28). The major Mn minerals reported in soils are...

Jeffrey E. Post

1999-01-01T23:59:59.000Z

209

Dynamics of oscillating relativistic tori around Kerr black holes  

Science Journals Connector (OSTI)

......angular momentum discs around Schwarzschild black holes, namely that...transmission of the signal recycling mirror (Shoemaker 2004)]. This...angular momentum discs around Schwarzschild black holes were considered...accretion solution on to a Schwarzschild black hole (Michel 1972......

Olindo Zanotti; José A. Font; Luciano Rezzolla; Pedro J. Montero

2005-02-01T23:59:59.000Z

210

Black holes cannot support conformal scalar hair  

E-Print Network [OSTI]

It is shown that the only static asymptotically flat non-extrema black hole solution of the Einstein-conformally invariant scalar field equations having the scalar field bounded on the horizon, is the Schwarzschild one. Thus black holes cannot be endowed with conformal scalar hair of finite length.

T. Zannias

1994-09-14T23:59:59.000Z

211

Mineral balances, including in drinking water, estimated for Merced County dairy herds  

E-Print Network [OSTI]

of daily mineral intake, drinking-water mineral contributionND Total daily intake, including minerals in drinking water.mineral contents in drinking water and daily drinking-water

Castillo, Alejandro R Dr.; Santos, Jose Eduardo P.; Tabone, Tom J.

2007-01-01T23:59:59.000Z

212

Category:Thermal Gradient Holes | Open Energy Information  

Open Energy Info (EERE)

in category "Thermal Gradient Holes" This category contains only the following page. T Thermal Gradient Holes Retrieved from "http:en.openei.orgwindex.php?titleCategory:T...

213

T-623: HP Business Availability Center Input Validation Hole...  

Broader source: Energy.gov (indexed) [DOE]

Business Availability Center Input Validation Hole Permits Cross-Site Scripting Attacks T-623: HP Business Availability Center Input Validation Hole Permits Cross-Site Scripting...

214

Three Hydrogen Bond Donor Catalysts: Oxyanion Hole Mimics and...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Hydrogen Bond Donor Catalysts: Oxyanion Hole Mimics and Transition State Analogues. Three Hydrogen Bond Donor Catalysts: Oxyanion Hole Mimics and Transition State Analogues....

215

Black hole foraging: feedback drives feeding  

E-Print Network [OSTI]

We suggest a new picture of supermassive black hole (SMBH) growth in galaxy centers. Momentum-driven feedback from an accreting hole gives significant orbital energy but little angular momentum to the surrounding gas. Once central accretion drops, the feedback weakens and swept-up gas falls back towards the SMBH on near-parabolic orbits. These intersect near the black hole with partially opposed specific angular momenta, causing further infall and ultimately the formation of a small-scale accretion disk. The feeding rates into the disk typically exceed Eddington by factors of a few, growing the hole on the Salpeter timescale and stimulating further feedback. Natural consequences of this picture include (i) the formation and maintenance of a roughly toroidal distribution of obscuring matter near the hole; (ii) random orientations of successive accretion disk episodes; (iii) the possibility of rapid SMBH growth; (iv) tidal disruption of stars and close binaries formed from infalling gas, resulting in visible fl...

Dehnen, Walter

2013-01-01T23:59:59.000Z

216

Black Hole Superradiance in Dynamical Spacetime  

E-Print Network [OSTI]

We study the superradiant scattering of gravitational waves by a nearly extremal black hole (dimensionless spin $a=0.99$) by numerically solving the full Einstein field equations, thus including backreaction effects. This allows us to study the dynamics of the black hole as it loses energy and angular momentum during the scattering process. To explore the nonlinear phase of the interaction, we consider gravitational wave packets with initial energies up to $10%$ of the mass of the black hole. We find that as the incident wave energy increases, the amplification of the scattered waves, as well as the energy extraction efficiency from the black hole, is reduced. During the interaction the apparent horizon geometry undergoes sizable nonaxisymmetric oscillations. The largest amplitude excitations occur when the peak frequency of the incident wave packet is above where superradiance occurs, but close to the dominant quasinormal mode frequency of the black hole.

William E. East; Fethi M. Ramazano?lu; Frans Pretorius

2014-03-14T23:59:59.000Z

217

LOW TEMPERATURE GEOTHERMAL MINERAL RECOVERY PROGRAM  

Broader source: Energy.gov [DOE]

This targeted initiative focuses on critical mineral extraction as a path to optimize the value stream of low-to-moderate temperature resources. The FOA aims to promote the advancement of thermal energy processes capable of converting geothermal heat sources into power, in conjunction with the development or exploitation of technologies capable of capturing, concentrating, and/or purifying valuable materials contained within geothermal brines to economically extract resources that can provide additional revenue streams to geothermal operators.

218

Mineral Supplementation of Beef Cows in Texas  

E-Print Network [OSTI]

-526 deficiencies, were frequently found. Sulfur (>.3 percent) and iron (>250 PPM) levels were often high in diets which are antagonistic to copper and sele- nium utilization. Molybdenum, a well-known copper antago- nist, was not extremely high... their genetic poten- tial. Generally, a good job with protein and energy sup- plementation is practiced, but trace mineral nutrition hasn?t kept pace. 3. In cattle, sheep and humans, genetics can greatly influ- ence copper requirements and susceptibility...

Herd, Dennis B.

1997-06-04T23:59:59.000Z

219

Bone Mineral Density in Women with Depression  

Science Journals Connector (OSTI)

...illness and the normal women were individually matched for age, body-mass index, and menstrual status; women with many of the risk factors associated with decreased bone mineral density were excluded; dual-energy x-ray absorptiometry was used to measure bone density at the spine, hip, and radius; and bone... Major depression is a complex disorder reflecting genetic, developmental, and environmental factors. Although its pathophysiology is not clearly understood, depression is associated with hypothalamic dysfunction — specifically, hypercortisolism, the ...

Michelson D.; Stratakis C.; Hill L.

1996-10-17T23:59:59.000Z

220

Science guide for the Long Valley Caldera deep hole  

SciTech Connect (OSTI)

The Magma Energy Program of the US Department of Energy, Geothermal Technology Division, is planning to begin drilling a deep (6 km) exploration well in Long Valley Caldera, California, in September 1988. The location of the well is in the central part of the caldera, coincident with a large number of shallow (5-7 km) geophysical anomalies identified through many independent investigations. Results from the hole will permit the following: direct investigation of the geophysical anomalies interpreted to be magma; investigation of the patterns and conditions of deep fluid circulation and heat transport below the caldera floor; determination of the amount of collapse and subsequent resurgence of the central portion of Long Valley caldera; and determination of the intrusion history of the central plutonic complex beneath the caldera, and establishment of the relationship of intrusive to eruptive events. The hole will thus provide a stringent test of the hypothesis that magma is still present within the central plutonic complex. If the interpretation of geophysical anomalies is confirmed, the hole will provide the first observations of the environment near a large silicic magma chamber. 80 refs., 7 figs., 2 tabs.

Rundle, J.B.; Eichelberger, J.C. (eds.)

1989-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Effective potential of a black hole in thermal equilibrium with quantum fields  

Science Journals Connector (OSTI)

Expectation values of one-loop renormalized thermal equilibrium stress-energy tensors of free conformal scalars, spin-1/2 fermions, and U(1) gauge fields on a Schwarzschild black hole background are used as sources in the semiclassical Einstein equation. The back reaction and new equilibrium metric have been found at O(?) for each spin field in previous work. In this paper, the nature of the modified black hole spacetime is explored through calculations of the effective potential for null and timelike orbits. Significant novel features affecting the motions of both massive and massless test particles show up at lowest order in ?=(MPl/M)2<1, where M is the black hole mass, and MPl is the Planck mass. Specifically, we find an increase in the black hole capture cross sections, and the existence of a region near the black hole with a repulsive contribution, generated by the U(1) back reaction, to the gravitational force. There is no such effect for other spins. Extrapolating our results suggests a tendency towards the formation of stable circular orbits, but the result cannot be established in O(?): the change in the metric becomes large and it changes its signature. We also consider the back reaction arising from multiple fields, which ultimately should be useful for treating a black hole in equilibrium with field ensembles belonging to gauge theories. In certain circumstances, however, reliable results will require calculations beyond O(?).

David Hochberg; Thomas W. Kephart; James W. York; Jr.

1994-05-15T23:59:59.000Z

222

Indian Mineral Development Act of 1982 | Open Energy Information  

Open Energy Info (EERE)

Mineral Development Act of 1982 Mineral Development Act of 1982 Jump to: navigation, search Statute Name Indian Mineral Development Act Year 1982 Url IndianDevelopment1982.jpg Description Provides for tribes to enter into energy development agreements with DOI approval References Indian Mineral Development Act of 1982[1] Bureau of Indian Affairs[2] The Indian Mineral Development Act of 1982 (IMDA) 25 U.S.C. Secs. 2101-2108 was enacted to provide Indian tribes with flexibilty in the development and sale of mineral resources. S.Rep. No. 97-472, 97th Cong.2d Sess. 2 (1982). Foremost among the beneficial effects of IMDA was the opportunity for Indian tribes to enter into joint venture agreements with mineral developers. The contractual relationships permitted by IMDA were designed to meet two objectives: First, to further the policy of self-determination

223

Advanced Research Power Program--CO2 Mineral Sequestration  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Sequestration Sequestration Robert Romanosky National Energy Technology Laboratory Mineral Carbonation Workshop August 8, 2001 Advanced Research Power Program Descriptor - include initials, /org#/date Mineral Sequestration Research Research effort seeks to refine and validate a promising CO 2 sequestration technology option, mineral sequestration also known as mineral carbonation Descriptor - include initials, /org#/date What is Mineral Carbonation * Reaction of CO 2 with Mg or Ca containing minerals to form carbonates * Lowest energy state of carbon is a carbonate and not CO 2 * Occurs naturally in nature as weathering of rock * Already proven on large scale - Carbonate formation linked to formation of the early atmosphere Descriptor - include initials, /org#/date Advantages of Mineral Carbonation

224

Investigating Binary Black Hole Mergers with Principal Component Analysis  

E-Print Network [OSTI]

Despite recent progress in numerical simulations of the coalescence of binary black hole systems, highly asymmetric spinning systems and the construction of accurate physical templates remain challenging and computationally expensive. We explore the feasibility of a prompt and robust test of whether the signals exhibit evidence for generic features that can educate new simulations. We form catalogs of numerical relativity waveforms with distinct physical effects and compute the relative probability that a gravitational wave signal belongs to each catalog. We introduce an algorithm designed to perform this task for coalescence signals using principal component analysis of waveform catalogs and Bayesian model selection and demonstrate its effectiveness.

James Clark; Laura Cadonati; James Healy; Ik Siong Heng; Josh Logue; Nicholas Mangini; Lionel London; Larne Pekowsky; Deirdre Shoemaker

2014-06-20T23:59:59.000Z

225

Geodesic Structure of the Schwarzschild Black Hole in Rainbow Gravity  

E-Print Network [OSTI]

In this paper we study the geodesic structure of the Schwarzschild black hole in rainbow gravity analyzing the behavior of null and time-like geodesic. We find that the structure of the geodesics essentially does not change when the semi-classical effects are included. However, we can distinguish different scenarios if we take into account the effects of rainbow gravity. Depending on the type of rainbow functions under consideration, inertial and external observers see very different situations in radial and non radial motion of a test particles.

Carlos Leiva; Joel Saavedra; Jose Villanueva

2008-12-09T23:59:59.000Z

226

Carbon dioxide sequestration by aqueous mineral carbonation of magnesium silicate minerals  

SciTech Connect (OSTI)

The dramatic increase in atmospheric carbon dioxide since the Industrial Revolution has caused concerns about global warming. Fossil-fuel-fired power plants contribute approximately one third of the total human-caused emissions of carbon dioxide. Increased efficiency of these power plants will have a large impact on carbon dioxide emissions, but additional measures will be needed to slow or stop the projected increase in the concentration of atmospheric carbon dioxide. By accelerating the naturally occurring carbonation of magnesium silicate minerals it is possible to sequester carbon dioxide in the geologically stable mineral magnesite (MgCO3). The carbonation of two classes of magnesium silicate minerals, olivine (Mg2SiO4) and serpentine (Mg3Si2O5(OH)4), was investigated in an aqueous process. The slow natural geologic process that converts both of these minerals to magnesite can be accelerated by increasing the surface area, increasing the activity of carbon dioxide in the solution, introducing imperfections into the crystal lattice by high-energy attrition grinding, and in the case of serpentine, by thermally activating the mineral by removing the chemically bound water. The effect of temperature is complex because it affects both the solubility of carbon dioxide and the rate of mineral dissolution in opposing fashions. Thus an optimum temperature for carbonation of olivine is approximately 185 degrees C and 155 degrees C for serpentine. This paper will elucidate the interaction of these variables and use kinetic studies to propose a process for the sequestration of the carbon dioxide.

Gerdemann, Stephen J.; Dahlin, David C.; O'Connor, William K.; Penner, Larry R.

2003-01-01T23:59:59.000Z

227

Development of Advanced Surface Enhancement Technology for Decreasing Wear and Corrosion of Equipment Used for Mineral Processing  

SciTech Connect (OSTI)

Equipment wear is a major concern in the mineral processing industry, which dramatically increases the maintenance cost and adversely affects plant operation efficiency. In this research, wear problems of mineral processing equipment including screens, sieve bends, heavy media vessel, dewatering centrifuge, etc., were identified. A novel surface treatment technology, high density infrared (HDI) surface coating process was proposed for the surface enhancement of selected mineral processing equipment. Microstructural and mechanical properties of the coated samples were characterized. Laboratory-simulated wear tests were conducted to evaluate the tribological performance of the coated components. Test results indicate that the wear resistance of AISI 4140 and ASTM A36 steels can be increased 3 and 5 folds, respectively by the application of HDI coatings.

Daniel Tao; Craig A. Blue

2004-08-01T23:59:59.000Z

228

Black Hole Evaporation in an Expanding Universe  

E-Print Network [OSTI]

We calculate the quantum radiation power of black holes which are asymptotic to the Einstein-de Sitter universe at spatial and null infinities. We consider two limiting mass accretion scenarios, no accretion and significant accretion. We find that the radiation power strongly depends on not only the asymptotic condition but also the mass accretion scenario. For the no accretion case, we consider the Einstein-Straus solution, where a black hole of constant mass resides in the dust Friedmann universe. We find negative cosmological correction besides the expected redshift factor. This is given in terms of the cubic root of ratio in size of the black hole to the cosmological horizon, so that it is currently of order $10^{-5} (M/10^{6}M_{\\odot})^{1/3} (t/14 {Gyr})^{-1/3}$ but could have been significant at the formation epoch of primordial black holes. Due to the cosmological effects, this black hole has not settled down to an equilibrium state. This cosmological correction may be interpreted in an analogy with the radiation from a moving mirror in a flat spacetime. For the significant accretion case, we consider the Sultana-Dyer solution, where a black hole tends to increase its mass in proportion to the cosmological scale factor. In this model, we find that the radiation power is apparently the same as the Hawking radiation from the Schwarzschild black hole of which mass is that of the growing mass at each moment. Hence, the energy loss rate decreases and tends to vanish as time proceeds. Consequently, the energy loss due to evaporation is insignificant compared to huge mass accretion onto the black hole. Based on this model, we propose a definition of quasi-equilibrium temperature for general conformal stationary black holes.

Hiromi Saida; Tomohiro Harada; Hideki Maeda

2007-05-28T23:59:59.000Z

229

DOE - Office of Legacy Management -- Central Nevada Test Site...  

Office of Legacy Management (LM)

Testing In and Chemical Analyses of Water Samples from Deep Exploratory Holes In Little Fish Lake, Monitor, Hot Creek, and Little Smoky Valleys, Nevada. USGS-474-90. 1971 Water...

230

Slim Holes for Small Power Plants  

SciTech Connect (OSTI)

Geothermal research study at Sandia National Laboratories has conducted a program in slimhole drilling research since 1992. Although our original interest focused on slim holes as an exploration method, it has also become apparent that they have substantial potential for driving small-scale, off-grid power plants. This paper summarizes Sandia's slim-hole research program, describes technology used in a ''typical'' slimhole drilling project, presents an evaluation of using slim holes for small power plants, and lists some of the research topics that deserve further investigation.

Finger, John T.

1999-08-06T23:59:59.000Z

231

Some remarks on black hole thermodynamics  

E-Print Network [OSTI]

Two thermodynamic "paradoxes" of black hole physics are re-examined. The first is that there is a thermal instability involving two coupled blackbody cavities containing two black holes, and second is that a classical black hole can swallow up entropy in the form of ambient blackbody photons without increasing its mass. The resolution of the second paradox by Bekenstein and by Hawking is re-visited. The link between Hawking radiation and Wigner's superluminal tunneling time is discussed using two equivalent Feynman diagrams, and Feynman's re-interpretation principle.

R. Y. Chiao

2010-12-27T23:59:59.000Z

232

Chaotic string-capture by black hole  

Science Journals Connector (OSTI)

We consider a macroscopic charge-current carrying (cosmic) string in the background of a Schwarzschild black hole. The string is taken to be circular and is allowed to oscillate and to propagate in the direction perpendicular to its plane (that is parallel to the equatorial plane of the black hole). Numerical investigations indicate that the system is non-integrable, but the interaction with the gravitational field of the black hole still gives rise to various qualitatively simple processes like `adiabatic capture' and `string transmutation'.

A L Larsen

1994-01-01T23:59:59.000Z

233

Mineral revenues: the 1983 report on receipts from Federal and Indian leases with summary data from 1920 to 1983  

SciTech Connect (OSTI)

Tables and figures abound for: mineral revenue management in 1983; offshore federal mineral revenues; onshore federal mineral revenues; Indian mineral revenues; distribution of federal and Indian mineral revenues; plus appended lease management data. (PSB)

Not Available

1984-01-01T23:59:59.000Z

234

Rotordynamic evaluation of frequency dependent impedances of hole-pattern gas damper seals  

E-Print Network [OSTI]

with an exit-to-inlet pressure ratio of 40 % and 54 %. Results of the tests show that the 3.18 mm hole-pattern seal has the highest average effective stiffness and lowest effective damping of all three seals. Results show that as cell depth increases, leakage...

Holt, Christopher George

2000-01-01T23:59:59.000Z

235

Binary Black Hole Accretion Flows From a Misaligned Circumbinary Disk  

Science Journals Connector (OSTI)

......mass-accretion-rate variation per binary...because each black hole passes across the circumbinary...mass-accretion-rate variation per binary...holes|black hole physics|Galaxies: nuclei...because each black hole passes across the circumbinary...the mass accretion rates is also independent......

Kimitake Hayasaki; Hideki Saito; Shin Mineshige

2013-08-25T23:59:59.000Z

236

(1) Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543 USA(1) Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543 USA (2) Harvard Medical School, Boston, MA 02114 USA(2) Harvard Medical School, Boston  

E-Print Network [OSTI]

(1) Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543 USA(1) Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543 USA (2) Harvard Medical School, Boston, MA 02114 USA(2) Harvard Medical School, Boston, MA 02114 USA (3) Section on Auditory Mechanics, NIDCD

237

Roadmap to the Project: Uranium Miners Resources  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

DOE Roadmap DOE Roadmap Experiments List Oral Histories Records Series Descriptions Overview Documents Declassified Documents Project Events ACHRE Report Uranium Miners Resources Building Public Trust Department of Defense Report FINAL REPORT OF THE RADIATION EXPOSURE COMPENSATION ACT COMMITTEE SUBMITTED TO THE HUMAN RADIATION INTERAGENCY WORKING GROUP JULY, 1996 CONTENTS Executive Summary Proposed Amendments to the Statute Recommended Modifications to the Department of Justice Regulations Introduction Issues Relating to Compensation for Lung Cancer Statutory and Regulatory Framework for Compensation Fairness of the Present Statutory Compensation Criteria Alternative Compensation Criteria Description of the Relative Risk Model Used to Derive Proposed Alternative Criteria, and Model Parameters

238

Miners and Medicine: West Virginia Memoirs  

Science Journals Connector (OSTI)

...first 80 years of this century, 19,826 men and boys died in mine accidents. This story has not been told sufficiently strongly to awaken the conscience of our nation. Miners and Medicine is a little disorganized, but it is a very readable account of health care in the coal camps. The first half vividly... The history of coal mining is rife with greed, inhumanity, and incredible danger. Sweatshops, exploitation of child labor, absentee ownership of highly profitable industries, and destruction of native culture were all phenomena of the Industrial ...

Point W.

1994-03-24T23:59:59.000Z

239

Thermodynamics of the Schwarzschild-de Sitter black hole: Thermal stability of the Nariai black hole  

SciTech Connect (OSTI)

We study the thermodynamics of the Schwarzschild-de Sitter black hole in five dimensions by introducing two temperatures based on the standard and Bousso-Hawking normalizations. We use the first-law of thermodynamics to derive thermodynamic quantities. The two temperatures indicate that the Nariai black hole is thermodynamically unstable. However, it seems that black hole thermodynamics favors the standard normalization and does not favor the Bousso-Hawking normalization.

Myung, Yun Soo [Institute of Basic Science and School of Computer Aided Science Inje University, Gimhae 621-749 (Korea, Republic of)

2008-05-15T23:59:59.000Z

240

Thermodynamics of Schwarzschild-de Sitter black hole: thermal stability of Nariai black hole  

E-Print Network [OSTI]

We study thermodynamics of the Schwarzschild-de Sitter black hole in five dimensions by introducing two temperatures based on the standard and Bousso-Hawking normalizations. We use the first-law of thermodynamics to derive thermodynamic quantities. The two temperatures indicate that the Nariai black hole is thermodynamically unstable. However, it seems that black hole thermodynamics favors the standard normalization, and does not favor the Bousso-Hawking normalization.

Yun Soo Myung

2007-12-20T23:59:59.000Z

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Application of Mineral Exploration Models and GIS to Generate Mineral Potential Maps as Input for Optimum Land-Use Planning in the Philippines  

Science Journals Connector (OSTI)

The inherent problems of classifying or inventorying potential mineral resources (as opposed to known mineral resources) pose specific challenges. In this paper, the application of a conceptual mineral exploratio...

Emmanuel John M. Carranza; Jerrysal C. Mangaoang; Martin Hale

1999-06-01T23:59:59.000Z

242

Phase transitions and Geometrothermodynamics of Regular black holes  

E-Print Network [OSTI]

In this paper we study the thermodynamics and state space geometry of regular black hole solutions such as Bardeen black hole, Ay\\'{o}n-Beato and Garc\\'{i}a black hole, Hayward black hole and Berej-Matyjasek-Trynieki-Wornowicz black hole. We find that all these black holes show second order thermodynamic phase transitions(SOTPT) by observing discontinuities in heat capacity-entropy graphs as well as the cusp type double point in free energy-temperature graph. Using the formulation of geometrothermodynamics we again find the singularities in the heat capacity of the black holes by calculating the curvature scalar of the Legendre invariant metric.

R. Tharanath; Jishnu Suresh; V. C. Kuriakose

2014-06-16T23:59:59.000Z

243

Conserved quantities in a black hole collision  

E-Print Network [OSTI]

The Newman-Penrose constants of the spacetime corresponding to the development of the Brill-Lindquist initial data are calculated by making use of a particular representation of spatial infinity due to H. Friedrich. The Brill-Lindquist initial data set represents the head-on collision of two non-rotating black holes. In this case one non-zero constant is obtained. Its value is given in terms of the product of the individual masses of the black holes and the square of a distance parameter separating the two black holes. This constant retains its value all along null infinity, and therefore it provides information about the late time evolution of the collision process. In particular, it is argued that the magnitude of the constants provides information about the amount of residual radiation contained in the spacetime after the collision of the black holes.

S. Dain; J. A. Valiente-Kroon

2001-05-28T23:59:59.000Z

244

Spectral line broadening in magnetized black holes  

E-Print Network [OSTI]

We consider weakly magnetized non-rotating black holes. In the presence of a regular magnetic field the motion of charged particles in the vicinity of a black hole is modified. As a result, the position of the innermost stable circular orbit (ISCO) becomes closer to the horizon. When the Lorentz force is repulsive (directed from the black hole) the ISCO radius can reach the gravitational radius. In the process of accretion charged particles (ions) of the accreting matter can be accumulated near their ISCO, while neutral particles fall down to the black hole after they reach $6M$ radius. The sharp spectral line Fe K$\\alpha$, emitted by iron ions at such orbits, is broadened when the emission is registered by a distant observer. In this paper we study this broadening effect and discuss how one can extract information concerning the strength of the magnetic field from the observed spectrum.

Valeri P. Frolov; Andrey A. Shoom; Christos Tzounis

2014-05-02T23:59:59.000Z

245

Energy of 4-Dimensional Black Hole, etc  

E-Print Network [OSTI]

In this letter I suggest possible redefinition of mass density, not depending on speed of the mass element, which leads to a more simple stress-energy for an object. I calculate energy of black hole.

Dmitriy Palatnik

2011-07-18T23:59:59.000Z

246

Horizon Operator Approach to Black Hole Quantization  

E-Print Network [OSTI]

The $S$-matrix Ansatz for the construction of a quantum theory of black holes is further exploited. We first note that treating the metric tensor $g_{\\m\

G. 't Hooft

1994-02-21T23:59:59.000Z

247

DEVELOPMENT OF DEWATERING AIDS FOR MINERALS AND COAL FINES  

SciTech Connect (OSTI)

MCT has developed a suite of novel dewatering chemicals (or aids) that are designed to cause a decrease in the capillary pressures of the water trapped in a filter cake by (1) decreasing the surface tension of water, (2) increasing the contact angles of the particles to be dewatered, and (3) causing the particles to coagulate, all at the same time. The decrease in capillary pressure in turn causes an increase in the rate filtration, an increase in throughput, and a decrease in pressure drop requirement for filtration. The reagents are used frequently as blends of different chemicals in order to bring about the changes in all of the process variables noted above. The minerals and coal samples tested in the present work included copper sulfide, lead sulfide, zinc sulfide, kaolin clay, talc, and silica. The laboratory-scale test work included studies of reagent types, drying cycle times, cake thickness, slurry temperature, conditioning intensity and time, solid content, and reagent dosages. To better understand the mechanisms involved, fundamental studies were also conducted. These included the measurements of the contact angles of the particles to be dewatered (which are the measures of particle hydrophobicity) and the surface tensions of the filtrates produced from dewatering tests. The results of the laboratory-scale filtration experiments showed that the use of the novel dewatering aids can reduce the moistures of the filter cake by 30 to 50% over what can be achieved using no dewatering aids. In many cases, such high levels of moisture reductions are sufficient to obviate the needs for thermal drying, which is costly and energy intensive. Furthermore, the use of the novel dewatering aids cause a substantial increase in the kinetics of dewatering, which in turn results in increased throughput. As a result of these technological advantages, the novel dewatering aids have been licensed to Nalco, which is one of the largest mining chemicals companies of the world. At least one mineral company is currently using the technology in full-scale plant operation, which has resulted in the shutdown of a thermal dryer.

Roe-Hoam Yoon; Ramazan Asmatulu; Ismail Yildirim; William Jansen; Jinmig Zhang; Brad Atkinson; Jeff Havens

2004-07-01T23:59:59.000Z

248

Thermally Speciated Mercury in Mineral Exploration | Open Energy  

Open Energy Info (EERE)

Thermally Speciated Mercury in Mineral Exploration Thermally Speciated Mercury in Mineral Exploration Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Thermally Speciated Mercury in Mineral Exploration Abstract Abstract unavailable. Author S.C. Smith Conference IGES; Dublin, CA; 2003/09/01 Published IGES, 2003 DOI Not Provided Check for DOI availability: http://crossref.org Citation S.C. Smith. 2003. Thermally Speciated Mercury in Mineral Exploration. In: Programs & Abstracts: Soil and Regolith Geochemistry in the Search for Mineral Deposits. IGES; 2003/09/01; Dublin, CA. Dublin, CA: IGES; p. 78 Retrieved from "http://en.openei.org/w/index.php?title=Thermally_Speciated_Mercury_in_Mineral_Exploration&oldid=681717" Categories: References Geothermal References

249

Radioactive Mineral Occurences in Nevada | Open Energy Information  

Open Energy Info (EERE)

Radioactive Mineral Occurences in Nevada Radioactive Mineral Occurences in Nevada Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Radioactive Mineral Occurences in Nevada Abstract Abstract unavailable. Author Larry J. Garside Organization Nevada Bureau of Mines and Geology Published Nevada Bureau of Mines and Geology, 1973 Report Number Open File Report 94-2 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Radioactive Mineral Occurences in Nevada Citation Larry J. Garside (Nevada Bureau of Mines and Geology). 1973. Radioactive Mineral Occurences in Nevada. Reno, NV: Nevada Bureau of Mines and Geology. Report No.: Open File Report 94-2. Retrieved from "http://en.openei.org/w/index.php?title=Radioactive_Mineral_Occurences_in_Nevada&oldid=690513"

250

Jordan Algebras and Extremal Black Holes  

E-Print Network [OSTI]

We review various properties of the exceptional Euclidean Jordan algebra of degree three. Euclidean Jordan algebras of degree three and their corresponding Freudenthal triple systems were recently shown to be intimately related to extremal black holes in N=2, d=4 homogeneous supergravities. Using a novel type of eigenvalue problem with eigenmatrix solutions, we elucidate the rich matrix geometry underlying the exceptional N=2, d=4 homogeneous supergravity and explore the relations to extremal black holes.

Michael Rios

2007-03-27T23:59:59.000Z

251

Black hole entropy and higher curvature interactions  

Science Journals Connector (OSTI)

A general formula for the entropy of stationary black holes in Lovelock higher-curvature gravity theories is obtained by integrating the first law of black hole mechanics, which is derived by Hamiltonian methods. The entropy is not simply one quarter of the surface area of the horizon, but also includes a sum of intrinsic curvature invariants integrated over a cross section of the horizon.

Ted Jacobson and Robert C. Myers

1993-06-14T23:59:59.000Z

252

Mutiny at the white-hole district  

E-Print Network [OSTI]

The white-hole sector of Kruskal's solution is almost never used in physical applications. However, it might contain the solution to many of the problems associated with gravitational collapse and evaporation. This essay tries to draw attention to some bouncing geometries that make a democratic use of the black- and white-hole sectors. We will argue that these types of behaviour could be perfectly natural in some approaches to the next physical level beyond classical general relativity.

Carlos Barceló; Raúl Carballo-Rubio; Luis J. Garay

2014-07-05T23:59:59.000Z

253

New Geophysical Technique for Mineral Exploration and Mineral Discrimination Based on Electromagnetic Methods  

SciTech Connect (OSTI)

The research during the first two years of the project was focused on developing the foundations of a new geophysical technique for mineral exploration and mineral discrimination, based on electromagnetic (EM) methods. The developed new technique is based on examining the spectral induced polarization effects in electromagnetic data using effective-medium theory and advanced methods of 3-D modeling and inversion. The analysis of IP phenomena is usually based on models with frequency dependent complex conductivity distribution. In this project, we have developed a rigorous physical/mathematical model of heterogeneous conductive media based on the effective-medium approach. The new generalized effective-medium theory of IP effect (GEMTIP) provides a unified mathematical method to study heterogeneity, multi-phase structure, and polarizability of rocks. The geoelectrical parameters of a new composite conductivity model are determined by the intrinsic petrophysical and geometrical characteristics of composite media: mineralization and/or fluid content of rocks, matrix composition, porosity, anisotropy, and polarizability of formations. The new GEMTIP model of multi-phase conductive media provides a quantitative tool for evaluation of the type of mineralization, and the volume content of different minerals using electromagnetic data. We have developed a 3-D EM-IP modeling algorithm using the integral equation (IE) method. Our IE forward modeling software is based on the contraction IE method, which improves the convergence rate of the iterative solvers. This code can handle various types of sources and receivers to compute the effect of a complex resistivity model. We have demonstrated that the generalized effective-medium theory of induced polarization (GEMTIP) in combination with the IE forward modeling method can be used for rock-scale forward modeling from grain-scale parameters. The numerical modeling study clearly demonstrates how the various complex resistivity models manifest differently in the observed EM data. These modeling studies lay a background for future development of the IP inversion method, directed at determining the electrical conductivity and the intrinsic chargeability distributions, as well as the other parameters of the relaxation model simultaneously. The new technology introduced in this project can be used for the discrimination between uneconomic mineral deposits and the location of zones of economic mineralization and geothermal resources.

Michael S. Zhdanov

2009-03-09T23:59:59.000Z

254

Effective mineral exploration programs maximize the ben-efit of appropriate technologies in order to increase cost  

E-Print Network [OSTI]

to help in the exploration process and to test the effectiveness of dif- ferent methods overEffective mineral exploration programs maximize the ben- efit of appropriate technologies in order of discovery. In other words, correct use of available tools can allow exploration programs to find more ore

Oldenburg, Douglas W.

255

Thermodynamics and evaporation of the noncommutative black hole  

E-Print Network [OSTI]

We investigate the thermodynamics of the noncommutative black hole whose static picture is similar to that of the nonsingular black hole known as the de Sitter-Schwarzschild black hole. It turns out that the final remnant of extremal black hole is a thermodynamically stable object. We describe the evaporation process of this black hole by using the noncommutativity-corrected Vaidya metric. It is found that there exists a close relationship between thermodynamic approach and evaporation process.

Yun Soo Myung; Yong-Wan Kim; Young-Jai Park

2006-11-24T23:59:59.000Z

256

Solar Wind Forecasting with Coronal Holes  

E-Print Network [OSTI]

An empirical model for forecasting solar wind speed related geomagnetic events is presented here. The model is based on the estimated location and size of solar coronal holes. This method differs from models that are based on photospheric magnetograms (e.g., Wang-Sheeley model) to estimate the open field line configuration. Rather than requiring the use of a full magnetic synoptic map, the method presented here can be used to forecast solar wind velocities and magnetic polarity from a single coronal hole image, along with a single magnetic full-disk image. The coronal hole parameters used in this study are estimated with Kitt Peak Vacuum Telescope He I 1083 nm spectrograms and photospheric magnetograms. Solar wind and coronal hole data for the period between May 1992 and September 2003 are investigated. The new model is found to be accurate to within 10% of observed solar wind measurements for its best one-month periods, and it has a linear correlation coefficient of ~0.38 for the full 11 years studied. Using a single estimated coronal hole map, the model can forecast the Earth directed solar wind velocity up to 8.5 days in advance. In addition, this method can be used with any source of coronal hole area and location data.

S. Robbins; C. J. Henney; J. W. Harvey

2007-01-09T23:59:59.000Z

257

Electrical resistance of metallized via?holes  

Science Journals Connector (OSTI)

The resistance of a via?hole laser?drilled through an alumina substrate depends on the hole geometry the type of probe the deposition technique and the properties of the film. If the walls of the hole constitute a truncated cone the resistance is R s/?[ln(d 2/d 1)]{1/4 + [h/(d 2 ? d 1)]2}1/2 where R s is the sheet resistance h is the substrate thickness and d 1 and d 2 are the diameters. Increasing the larger diameter helps by (a) reducing the rim?to?rim resistance (b) reducing the ’’spreading’’ resistance and (c) making the walls more accessible for metallization. A four?point probe on the other hand measures the rim?to?rim resistance as approximately (R s/?) ln cosh (h/d) where d is an average diameter. If the hole is partially bare the four?point reading will depend on probe orientation. A comparison of calculation and measurement indicates R s in the hole to be between two and forty times R s outside depending on the thickness. Electrical probing of broken?open holes showed this to be due to thickness differences not roughness or ledge resistance.

Peter M. Hall

1975-01-01T23:59:59.000Z

258

Initial data for black hole evolutions  

E-Print Network [OSTI]

We discuss the initial value problem of general relativity in its recently unified Lagrangian and Hamiltonian pictures and present a multi-domain pseudo-spectral collocation method to solve the resulting coupled nonlinear partial differential equations. Using this code, we explore several approaches to construct initial data sets containing one or two black holes: We compute quasi-circular orbits for spinning equal mass black holes and unequal mass (nonspinning) black holes using the effective potential method with Bowen-York extrinsic curvature. We compare initial data sets resulting from different decompositions, and from different choices of the conformal metric with each other. Furthermore, we use the quasi-equilibrium method to construct initial data for single black holes and for binary black holes in quasi-circular orbits. We investigate these binary black hole data sets and examine the limits of large mass-ratio and wide separation. Finally, we propose a new method for constructing spacetimes with superposed gravitational waves of possibly very large amplitude.

Harald P. Pfeiffer

2005-10-04T23:59:59.000Z

259

Climate VISION: Private Sector Initiatives: Minerals: GHG Inventory...  

Office of Scientific and Technical Information (OSTI)

GHG Inventory Protocols Read the Industrial Minerals Association - North America (IMA-NA) Borates and Soda Ash Sections Greenhouse Gas Inventory Protocol (PDF 75 KB) Download...

260

Coop: 02-2011 COLLEGE OF ENGINEERING AND MINERAL RESOURCES  

E-Print Network [OSTI]

Coop: 02-2011 COLLEGE OF ENGINEERING AND MINERAL RESOURCES COOPERATIVE EDUCATION PROGRAM STUDENT. DEPENDABILITY Reliable, prompt, trustworthy; meets obligations and follow directions. CREATIVITY Proposes ideas

Mohaghegh, Shahab

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Reclamation of Land Used for Mineral Mining (Virginia)  

Broader source: Energy.gov [DOE]

This legislation aims to provide for the rehabilitation and conservation of land affected by the mining of minerals through proper planning, proper use of appropriate methods of mining,...

262

Ore mineralization in naphtides and problems of its genesis  

Science Journals Connector (OSTI)

The paper presents several examples of metalliferous naphtide mineralization hosted in sedimentary and magmatic rocks and discusses different models of their origin. Geological, geochemical, experimental, and ...

V. S. Zubkov; E. A. Razvozzhaeva

2012-04-01T23:59:59.000Z

263

Potential of Mineral Uptake Efficiency by Some Apple Rootstocks  

E-Print Network [OSTI]

1999. Drought tolerance of apple rootstocks: Production andwater relations of five apple rootstocks. Acta Horticultureon Mineral Composition of Apple Leaves. J. Am. Soc. Hort.

Amiri, Mohammad E; Fallahi, Esmail

2009-01-01T23:59:59.000Z

264

Thermal Gradient Holes At Walker-Lane Transitional Zone Region (Pritchett,  

Open Energy Info (EERE)

Walker-Lane Transitional Zone Region (Pritchett, Walker-Lane Transitional Zone Region (Pritchett, 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Walker-Lane Transitional Zone Region (Pritchett, 2004) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Thermal Gradient Holes Activity Date Usefulness not useful DOE-funding Unknown Notes NOTE: These are theoretical/computer simulation tests of various methods on eight hypothetical 'model' basing-and-range geothermal systems. "The 300-meter heat flow holes are essentially useless for finding the "hidden" reservoirs. Clearly, the best results are obtained from the SP and MT surveys, with DC resistivity a close third. It is concluded that the best

265

Results Of An Experimental Drill Hole At The Summit Of Kilauea Volcano,  

Open Energy Info (EERE)

Results Of An Experimental Drill Hole At The Summit Of Kilauea Volcano, Results Of An Experimental Drill Hole At The Summit Of Kilauea Volcano, Hawaii Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Results Of An Experimental Drill Hole At The Summit Of Kilauea Volcano, Hawaii Details Activities (9) Areas (1) Regions (0) Abstract: A borehole has been drilled to a depth of 1262 m (4141 ft) beneath the summit of Kilauea volcano, on the island of Hawaii. The purpose was to test predictions made from surface-based geophysical surveys and seek evidence of a hydrothermal system over a known magma body. Nearly all rocks penetrated by the borehole are olivine basalt, with minor amounts of olivine diabase, picrite diabase and olivine-poor basalt. While the rocks are petrographically uniform, their physical properties vary widely from

266

3D SPH Simulations of Shocks in Accretion Flows around black holes  

E-Print Network [OSTI]

We present the simulation of 3D time dependent flow of rotating ideal gas falling into a Schwarzschild black hole. It is shown that also in the 3D case steady shocks are formed in a wide range of parameters (initial angular momentum and thermal energy). We therefore highlight the stability of the phenomenon of shock formation in sub keplerian flows onto black holes, and reenforce the role of the shocks in the high luminosity emission from black hole candidates. The simulations have been performed using a parallelized code based on the Smoothed Particles Hydrodynamics method (SPH). We also discuss some properties of the shock problem that allow its use as a quantitative test of the accuracy of the used numerical method. This shows that the accuracy of SPH is acceptable although not excellent.

G. Gerardi; D. Molteni; V. Teresi

2005-01-25T23:59:59.000Z

267

Laboratory Evaluation of EGS Shear Stimulation-Test 001  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

this is the results of an initial setup-shakedon test in order to develop the plumbing system for this test design. a cylinder of granite with offset holes was jacketed and subjected to confining pressure and low temperature (85C) and pore water pressure. flow through the sample was developed at different test stages.

Steve Bauer

268

Laboratory Evaluation of EGS Shear Stimulation-Test 001  

SciTech Connect (OSTI)

this is the results of an initial setup-shakedon test in order to develop the plumbing system for this test design. a cylinder of granite with offset holes was jacketed and subjected to confining pressure and low temperature (85C) and pore water pressure. flow through the sample was developed at different test stages.

Bauer, Steve

2014-07-29T23:59:59.000Z

269

Carbon Mineralization by Aqueous Precipitation for Beneficial Use of CO2 from Flue Gas  

SciTech Connect (OSTI)

The objective of this project is to demonstrate an innovative process to mineralize CO2 from flue gas directly to reactive carbonates and maximize the value and versatility of its beneficial use products. The program scope includes the design, construction, and testing of a CO2 Conversion to Material Products (CCMP) Pilot Demonstration Plant utilizing CO2 from the flue gas of a power production facility in Moss Landing, CA as well as flue gas from coal combustion. This topical report covers Phase 2b, which is the construction phase of pilot demonstration subsystems that make up the integrated plant. The subsystems included are the mineralization subsystem, the Alkalinity Based on Low Energy (ABLE) subsystem, the waste calcium oxide processing subsystem, and the fiber cement board production subsystem. The fully integrated plant is now capable of capturing CO2 from various sources (gas and coal) and mineralizing into a reactive calcium carbonate binder and subsequently producing commercial size (4ftx8ft) fiber cement boards. The topical report provides a description of the “as built” design of these subsystems and the results of the commissioning activities that have taken place to confirm operability. At the end of Phase 2b, the CCMP pilot demonstration is fully ready for testing.

Devenney, Martin; Gilliam, Ryan; Seeker, Randy

2014-06-01T23:59:59.000Z

270

Black hole fireworks: quantum-gravity effects outside the horizon spark black to white hole tunneling  

E-Print Network [OSTI]

We show that there is a classical metric satisfying the Einstein equations outside a finite spacetime region where matter collapses into a black hole and then emerges from a white hole. We compute this metric explicitly. We show how quantum theory determines the (long) time for the process to happen. A black hole can thus quantum-tunnel into a white hole. For this to happen, quantum gravity should affect the metric also in a small region outside the horizon: we show that contrary to what is commonly assumed, this is not forbidden by causality or by the semiclassical approximation, because quantum effects can pile up over a long time. This scenario alters radically the discussion on the black hole information puzzle.

Hal M. Haggard; Carlo Rovelli

2014-07-06T23:59:59.000Z

271

Calcination and pyroprocessing of mineral fines  

Science Journals Connector (OSTI)

ABSTRACT During the past 40 years we have witnessed an interesting development in technologies for calcination and pyroprocessing of fine-grained material. This has led to the gas suspension principles now being widely used in the cement industry and in chemical processing systems for solids. The present paper deals with the dilute-phase systems and summarises the developments over the past 10 years illustrating the importance of raw material properties and product specifications in the selection and design of GSC systems. Methods for the characterisation of raw materials, such as crushed rock, flotation concentrates and hydrates, are illustrated with examples from industrial plants operating on dolomite, limestone and alumina hydrate. KEY WORDS GSC Gas Suspension Calcination Lime, Dolime, Alumina, Minerals Processing

E.A. Neubert

1988-01-01T23:59:59.000Z

272

Microhole Coiled Tubing Bottom Hole Assemblies  

SciTech Connect (OSTI)

The original objective of the project, to deliver an integrated 3 1/8-inch diameter Measurement While Drilling (MWD) and Logging While Drilling (LWD) system for drilling small boreholes using coiled tubing drilling, has been achieved. Two prototype systems have been assembled and tested in the lab. One of the systems has been successfully tested downhole in a conventional rotary drilling environment. Development of the 3 1/8-inch system has also lead to development and commercialization of a slightly larger 3.5-inch diameter system. We are presently filling customer orders for the 3.5-inch system while continuing with commercialization of the 3 1/8-inch system. The equipment developed by this project will be offered for sale to multiple service providers around the world, enabling the more rapid expansion of both coiled tubing drilling and conventional small diameter drilling. The project was based on the reuse of existing technology whenever possible in order to minimize development costs, time, and risks. The project was begun initially by Ultima Labs, at the time a small company ({approx}12 employees) which had successfully developed a number of products for larger oil well service companies. In September, 2006, approximately 20 months after inception of the project, Ultima Labs was acquired by Sondex plc, a worldwide manufacturer of downhole instrumentation for cased hole and drilling applications. The acquisition provided access to proven technology for mud pulse telemetry, downhole directional and natural gamma ray measurements, and surface data acquisition and processing, as well as a global sales and support network. The acquisition accelerated commercialization through existing Sondex customers. Customer demand resulted in changes to the product specification to support hotter (150 C) and deeper drilling (20,000 psi pressure) than originally proposed. The Sondex acquisition resulted in some project delays as the resistivity collar was interfaced to a different MWD system and also as the mechanical design was revised for the new pressure requirements. However, the Sondex acquisition has resulted in a more robust system, secure funding for completion of the project, and more rapid commercialization.

Don Macune

2008-06-30T23:59:59.000Z

273

Black Lung: Dispute about Diagnosis of Miners" Ailment  

Science Journals Connector (OSTI)

...them, all residents of Appalachia and all suffering from pneumoconiosis-the...caused by years of inhaling coal dust-paid an unexpected...majority of doctors in the coal-mining areas are not on the miners' side. The coal miners have been done wrong...

Joe Pichirallo

1971-10-08T23:59:59.000Z

274

Trans Boundary Transport of Pollutants by Atmospheric Mineral  

E-Print Network [OSTI]

Trans Boundary Transport of Pollutants by Atmospheric Mineral Dust Y I G A L E R E L , * , U R I D, and solid constituents in the atmosphere (3-11). Uptake of pollutants by mineral dust has been shown Jerusalem, Israel The transport of anthropogenic pollution by desert dust in the Eastern Mediterranean

Einat, Aharonov

275

Carbon Mineralization: From Natural Analogues to Engineered Systems  

Science Journals Connector (OSTI)

...Chisti Y (2007) Biodiesel from microalgae...mineral pretreatment process cost. U.S. Dep...S-J (2012b) Evaluation of factors affecting...Diopside. Int J Miner Process 61:273-288 Kalinkina...sequestration. Fuel Process Technol 86:1627-1645...Microalgae for biodiesel production and other...

Ian M. Power; Anna L. Harrison; Gregory M. Dipple; Siobhan A. Wilson; Peter B. Kelemen; Michael Hitch; Gordon Southam

276

Black Hole Evaporation in an Expanding Universe  

E-Print Network [OSTI]

We calculate the quantum radiation power of black holes which are asymptotic to the Einstein-de Sitter universe at spatial and null infinities. We consider two limiting mass accretion scenarios, no accretion and significant accretion. We find that the radiation power strongly depends on not only the asymptotic condition but also the mass accretion scenario. For the no accretion case, we consider the Einstein-Straus solution, where a black hole of constant mass resides in the dust Friedmann universe. We find negative cosmological correction besides the expected redshift factor. This is given in terms of the cubic root of ratio in size of the black hole to the cosmological horizon, so that it is currently of order $10^{-5} (M/10^{6}M_{\\odot})^{1/3} (t/14 {Gyr})^{-1/3}$ but could have been significant at the formation epoch of primordial black holes. Due to the cosmological effects, this black hole has not settled down to an equilibrium state. This cosmological correction may be interpreted in an analogy with th...

Saida, Hiromi; Maeda, Hideki

2007-01-01T23:59:59.000Z

277

Microsoft Word - DOE-ID-13-053 Woods Hole EC B3-16.doc  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

3 3 SECTION A. Project Title: Advances in the Recovery of Uranium from Seawater: Studies under Real Ocean Conditions - Woods Hole Oceanographic Institution SECTION B. Project Description Woods Hole Oceanographic Institution proposes to study the effectiveness of uranium adsorbents using different field testing designs. Objectives include: 1) To test the extraction efficiency of the uranium adsorbents under changing environmental conditions in a controlled laboratory setting and then in the field. 2) To collect and measure radium extracted onto manganese oxide coated fibers to quantify the volume of water passing through the uranium adsorbents. 3) To determine by field-tests the most efficient methods for collecting and the best platform to expose, in high current regimes,

278

Epithermal Gold Mineralization and a Geothermal Resource at Blue Mountain,  

Open Energy Info (EERE)

Epithermal Gold Mineralization and a Geothermal Resource at Blue Mountain, Epithermal Gold Mineralization and a Geothermal Resource at Blue Mountain, Humboldt County, Nevada Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Epithermal Gold Mineralization and a Geothermal Resource at Blue Mountain, Humboldt County, Nevada Abstract Shallow exploration drilling on the west flank of Blue Mountain discovered sub economic gold mineralization and a spatially associated active geothermal system. The gold mineralization is an unusual example of an acid sulfate type epithermal system developed in pre Tertiary sedimentary host rocks. The geothermal system is largely unexplored but is unusual in that surface manifestation s typically associated with active geothermal system are not present. Authors Andrew J. Parr and Timothy J. Percival

279

Hydrothermal alteration mineral mapping using hyperspectral imagery in  

Open Energy Info (EERE)

alteration mineral mapping using hyperspectral imagery in alteration mineral mapping using hyperspectral imagery in Dixie Valley, Nevada Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Hydrothermal alteration mineral mapping using hyperspectral imagery in Dixie Valley, Nevada Abstract Hyperspectral (HyMap) data was used to map the location ofoutcrops of high temperature, hydrothermally alterated minerals(including alunite, pyrophyllite, and hematite) along a 15 kmswath of the eastern front of the Stillwater Mountain Range inDixie Valley, Nevada. Analysis of this data set reveals that severaloutcrops of these altered minerals exist in the area, and thatone outcrop, roughly 1 square kilometer in area, shows abundanthigh temperature alteration. Structural analysis of the alteredregion using a

280

Mineral Leasing Act of 1920 | Open Energy Information  

Open Energy Info (EERE)

Leasing Act of 1920 Leasing Act of 1920 Jump to: navigation, search Statute Name Mineral Leasing Act of 1920 Year 1920 Url MineralLeasingAct.jpg Description The Mineral Leasing Act established the authority of the Secretary of the Interior to oversee oil and gas operations on federal land. References Federal Oil and Gas Statutes[1] Mineral Leasing Act of 1920 (30 U.S.C. § 181 et seq.) - The Mineral Leasing Act established the authority of the Secretary of the Interior to oversee oil and gas operations on federal land. "The Secretary of the Interior is authorized to prescribe necessary and proper rules and regulations and to do any and all things necessary to carry out and accomplish the purposes of this Act." 30 U.S.C. § 189 References ↑ "Federal Oil and Gas Statutes"

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Cementation process for minerals recovery from Salton Sea geothermal brines  

SciTech Connect (OSTI)

The potential for minerals recovery from a 1000-MWe combined geothermal power and minerals recovery plant in the Salton Sea is examined. While the possible value of minerals recovered would substantially exceed the revenue from power production, information is insufficient to carry out a detailed economic analysis. The recovery of precious metals - silver, gold, and platinum - is the most important factor in determining the economics of a minerals recovery plant; however, the precious metals content of the brines is not certain. Such a power plant could recover 14 to 31% of the US demand for manganese and substantial amounts of zinc and lead. Previous work on minerals extraction from Salton Sea brines is also reviewed and a new process, based on a fluidized-bed cementation reaction with metallic iron, is proposed. This process would recover the precious metals, lead, and tin present in the brines.

Maimoni, A.

1982-01-26T23:59:59.000Z

282

Minerals on Public Lands (Texas) | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Minerals on Public Lands (Texas) Minerals on Public Lands (Texas) Minerals on Public Lands (Texas) < Back Eligibility Utility Fed. Government Commercial Investor-Owned Utility Industrial Construction Municipal/Public Utility Local Government Rural Electric Cooperative Tribal Government Program Info State Texas Program Type Siting and Permitting Provider Texas General Land Office Any tract of land that belongs to the state, including islands, salt and freshwater lakes, bays, inlets, marshes, and reefs owned by the state within tidewater limits, the part of the Gulf of Mexico within the state's jurisdiction, unsold surveyed public school land, rivers and channels that belong to the state, and land sold with a reservation of minerals to the state are subject to prospect by any person for those minerals which are

283

Two black hole initial data  

E-Print Network [OSTI]

Misner initial data are a standard example of time-symmetric initial data with two apparent horizons. Compact formulae describing such data are presented in the cases of equal or non-equal masses (i.e. isometric or non-isometric horizons). The interaction energy in the "Schwarzschild + test particle" limit of the Misner data is analyzed.

Szymon Leski

2005-02-21T23:59:59.000Z

284

Injection of Electrons and Holes into Nanostructures  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Injection of Electrons and Holes into Nanostructures Injection of Electrons and Holes into Nanostructures This program targets fundamental understanding of nanoscale charge transfer processes. The proposed work draws on the strengths of the Brookhaven Chemistry Department in the areas of electron transfer experiment and theory, and extends the area of inquiry to nanoscale processes. Electron/hole injection into a wire, a nanocrystal, a nanotube or other nanostructure in solution may be brought about by light absorption, by an electron pulse (pulse radiolysis, LEAF), by a chemical reagent, or through an electrode. These processes are being studied by transient methods by following conductivity, current, but most generally, spectroscopic changes in the solutions to determine the dynamics of charge injection. The observed transient spectra can also provide values for electron-transfer coupling elements and energetics. Theoretical/computational studies can help in materials design and in the interpretation of the experimental results. The experimental systems being examined include molecular wires and metal nanoclusters.

285

Thermal Gradient Holes | Open Energy Information  

Open Energy Info (EERE)

Thermal Gradient Holes Thermal Gradient Holes Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Thermal Gradient Holes Details Activities (50) Areas (39) Regions (4) NEPA(29) Exploration Technique Information Exploration Group: Drilling Techniques Exploration Sub Group: Exploration Drilling Parent Exploration Technique: Exploration Drilling Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Field wide fluid flow characteristics if an array of wells are drilled Thermal: Mapping and projecting thermal anomalies Cost Information Low-End Estimate (USD): 5.00500 centUSD 0.005 kUSD 5.0e-6 MUSD 5.0e-9 TUSD / foot Median Estimate (USD): 16.501,650 centUSD 0.0165 kUSD 1.65e-5 MUSD 1.65e-8 TUSD / foot High-End Estimate (USD): 50.005,000 centUSD

286

Probing black holes with constellation-X  

Science Journals Connector (OSTI)

Constellation-X is a premiere X-ray spectroscopy mission due to launch within the next decade. With a factor of 100 increase in sensitivity over current X-ray spectroscopy missions and an excellent energy resolution of 2 eV at 6 keV one of the prime science goals of the mission will be to observe activity near the black hole event horizon by measuring changes in the Fe K? fluorescence emission line profile and time-linked intensity changes between the line and the continuum. Detailed variability studies with Constellation-X will allow us to reconstruct “images” of the accretion disk probe the effects of strong gravity in the vicinity of black holes and measure black hole mass and spin via deconvolution of the line profile.

Kimberly A. Weaver

2001-01-01T23:59:59.000Z

287

Black Hole Complementarity in Gravity's Rainbow  

E-Print Network [OSTI]

We calculate the required energy for duplication of information in the context of black hole complementarity in the rainbow Schwarzschild black hole. The resultant energy can be written as the well-defined limit given by the conventional result for the vanishing rainbow parameter which characterizes the deformation of the relativistic dispersion relation in the freely falling frame. It shows that the duplication of information in quantum mechanics could be not allowed below a certain critical value of the rainbow parameter; however, it could be possible above the critical value of the rainbow parameter, so that the consistent formulation in the rainbow Schwarzschild black hole requires additional constraints or any other resolutions for the latter case.

Gim, Yongwan

2015-01-01T23:59:59.000Z

288

Nonperturbative black hole entropy and Kloosterman sums  

E-Print Network [OSTI]

Non-perturbative quantum corrections to supersymmetric black hole entropy often involve nontrivial number-theoretic phases called Kloosterman sums. We show how these sums can be obtained naturally from the functional integral of supergravity in asymptotically AdS_2 space for a class of black holes. They are essentially topological in origin and correspond to charge-dependent phases arising from the various gauge and gravitational Chern-Simons terms and boundary Wilson lines evaluated on Dehn-filled solid 2-torus. These corrections are essential to obtain an integer from supergravity in agreement with the quantum degeneracies, and reveal an intriguing connection between topology, number theory, and quantum gravity. We give an assessment of the current understanding of quantum entropy of black holes.

Dabholkar, Atish; Murthy, Sameer

2014-01-01T23:59:59.000Z

289

The AGN Black Hole Mass Database  

E-Print Network [OSTI]

The AGN Black Hole Mass Database is a compilation of all published spectroscopic reverberation-mapping studies of active galaxies. We have created a public web interface, where users may get the most up-to-date black hole masses from reverberation mapping for any particular active galactic nucleus (AGN), as well as obtain the individual measurements upon which the masses are based and the appropriate references. While the database currently focuses on the measurements necessary for black hole mass determinations, we also plan to expand it in the future to include additional useful information, such as host-galaxy characteristics. New reverberation mapping results will also be incorporated into the database as they are published in peer-refereed journals.

Bentz, Misty C

2014-01-01T23:59:59.000Z

290

Black hole chromosphere at the CERN LHC  

Science Journals Connector (OSTI)

If the scale of quantum gravity is near a TeV, black holes will be copiously produced at the CERN LHC. In this work we study the main properties of the light descendants of these black holes. We show that the emitted partons are closely spaced outside the horizon, and hence they do not fragment into hadrons in vacuum but more likely into a kind of quark-gluon plasma. Consequently, the thermal emission occurs far from the horizon, at a temperature characteristic of the QCD scale. We analyze the energy spectrum of the particles emerging from the “chromosphere,” and find that the hard hadronic jets are almost entirely suppressed. They are replaced by an isotropic distribution of soft photons and hadrons, with hundreds of particles in the GeV range. This provides a new distinctive signature for black hole events at LHC.

Luis Anchordoqui and Haim Goldberg

2003-03-26T23:59:59.000Z

291

Extremal limits and black hole entropy  

E-Print Network [OSTI]

Taking the extremal limit of a non-extremal Reissner-Nordstr\\"om black hole (by externally varying the mass or charge), the region between the inner and outer event horizons experiences an interesting fate -- while this region is absent in the extremal case, it does not disappear in the extremal limit but rather approaches a patch of $AdS_2\\times S^2$. In other words, the approach to extremality is not continuous, as the non-extremal Reissner-Nordstr\\"om solution splits into two spacetimes at extremality: an extremal black hole and a disconnected $AdS$ space. We suggest that the unusual nature of this limit may help in understanding the entropy of extremal black holes.

Sean M. Carroll; Matthew C. Johnson; Lisa Randall

2009-01-08T23:59:59.000Z

292

Strings as solitons & black holes as strings  

Science Journals Connector (OSTI)

Supersymmetric closed string theories contain an infinite tower of BPS-saturated, oscillating, macroscopic strings in the perturbative spectrum. When these theories have dual formulations, this tower of states must exist nonperturbatively as solitons in the dual theories. We present a general class of exact solutions of low-energy supergravity that corresponds to all these states. After dimensional reduction they can be interpreted as supersymmetric black holes with a degeneracy related to the degeneracy of the string states. For example, in four dimensions we obtain a point-like solution which is asymptotic to a stationary, rotating, electrically-charged black hole with Regge-bounded angular momentum and with the usual ring-singularity replaced by a string source. This further supports the idea that the entropy of supersymmetric black holes can be understood in terms of counting of string states. We also discuss some applications of these solutions to string duality.

Atish Dabholkar; Jerome P. Gauntlett; Jeffrey A. Harvey; Daniel Waldram

1996-01-01T23:59:59.000Z

293

A Comparison of Intermediate Mass Black Hole Candidate ULXs and Stellar-Mass Black Holes  

E-Print Network [OSTI]

Cool thermal emission components have recently been revealed in the X-ray spectra of a small number of ultra-luminous X-ray (ULX) sources with L_X > 1 E+40 erg/s in nearby galaxies. These components can be well fitted with accretion disk models, with temperatures approximately 5-10 times lower than disk temperatures measured in stellar-mass Galactic black holes when observed in their brightest states. Because disk temperature is expected to fall with increasing black hole mass, and because the X-ray luminosity of these sources exceeds the Eddington limit for 10 Msun black holes (L_Edd = 1.3 E+39 erg/s), these sources are extremely promising intermediate-mass black hole candidates (IMBHCs). In this Letter, we directly compare the inferred disk temperatures and luminosities of these ULXs, with the disk temperatures and luminosities of a number of Galactic black holes. The sample of stellar-mass black holes was selected to include different orbital periods, companion types, inclinations, and column densities. These ULXs and stellar-mass black holes occupy distinct regions of a L_X -- kT diagram, suggesting these ULXs may harbor IMBHs. We briefly discuss the important strengths and weaknesses of this interpretation.

J. M. Miller; A. C. Fabian; M. C. Miller

2004-06-29T23:59:59.000Z

294

Building of a conceptual model at UE25-c hole complex  

SciTech Connect (OSTI)

US Geological Survey and Lawrence Berkeley Laboratory are attempting to construct a conceptual model of the UE25-c hole complex. An interdisciplinary approach is discussed where all the available data are integrated. Site geology, borehole geophysics and hydraulic test results at UE25-c hole complex suggest that groundwater flow may be controlled by fractures and faults. Significant clusters of fractures in the C-holes are perpendicular to bedding and may be cooling cracks or may be tectonically induced. Unresolved evidence indicates that a fault may intersect the C-holes. For these reasons a porous medium approximation of the rock in the saturated zone at the scale of a well test may be inappropriate. Instead, an Equivalent Discontinuum Model is proposed to model the UE25-c complex hydrology. EDM does not reproduce every geometrical detail of the real system, but instead, attempts to reproduce the observed behavior of the fracture system while preserving the inherent discontinuous nature of the system. 6 refs., 7 figs.

Karasaki, K.; Landsfeld, M. [Lawrence Berkeley Lab., CA (USA); Grossenbacher, K. [Johns Hopkins Univ., Baltimore, MD (USA). Dept. of Earth and Planetary Sciences

1990-01-01T23:59:59.000Z

295

Pyridine sorption to mineral surfaces: a fourier transform infrared spectroscopy study  

E-Print Network [OSTI]

by pyridine, to various mineral surfaces. Four minerals were used in this study: montmorillinite, kaolinite, iron oxide and silica gel. Conditions were varied by sorting pyridine to the minerals in both the gaseous and aqueous phase and by altering...

Graham, Robert Edward

2012-06-07T23:59:59.000Z

296

Chemically Accelerated Carbon Mineralization: Chemical and Biological Catalytic Enhancement of Weathering of Silicate Minerals as Novel Carbon Capture and Storage  

SciTech Connect (OSTI)

IMPACCT Project: Columbia University is developing a process to pull CO2 out of the exhaust gas of coal-fired power plants and turn it into a solid that can be easily and safely transported, stored above ground, or integrated into value-added products (e.g. paper filler, plastic filler, construction materials, etc.). In nature, the reaction of CO2 with various minerals over long periods of time will yield a solid carbonate—this process is known as carbon mineralization. The use of carbon mineralization as a CO2 capture and storage method is limited by the speeds at which these minerals can be dissolved and CO2 can be hydrated. To facilitate this, Columbia University is using a unique process and a combination of chemical catalysts which increase the mineral dissolution rate, and the enzymatic catalyst carbonic anhydrase which speeds up the hydration of CO2.

None

2010-07-01T23:59:59.000Z

297

How red is a quantum black hole?  

E-Print Network [OSTI]

Radiating black holes pose a number of puzzles for semiclassical and quantum gravity. These include the transplanckian problem -- the nearly infinite energies of Hawking particles created near the horizon, and the final state of evaporation. A definitive resolution of these questions likely requires robust inputs from quantum gravity. We argue that one such input is a quantum bound on curvature. We show how this leads to an upper limit on the redshift of a Hawking emitted particle, to a maximum temperature for a black hole, and to the prediction of a Planck scale remnant.

Viqar Husain; Oliver Winkler

2005-05-30T23:59:59.000Z

298

The effects of fastener hole defects  

E-Print Network [OSTI]

) August 1991 ABSTRACT The Effects of Fastener Hole Defects. (August 1991) Scot D. Andrews, B. S. , Texas A8rM University Chair of Advisory Committee: Dr. Orden O. Ochoa The influence of drilling-induced defects, such as delamination, on the fatigue... Of Delaminated Zone Elements . . Figure 34. Enlarged View Of Area Near Hole 58 59 61 Page Figure 35. Example Finite Element Mesh Figure 36. Selected Elements For Stress Distribution Graphs . . Figure 37. Example Of o? Stress Distribution For 18 Ply Tape...

Andrews, Scot D.

2012-06-07T23:59:59.000Z

299

CHARYBDIS: A Black Hole Event Generator  

E-Print Network [OSTI]

CHARYBDIS is an event generator which simulates the production and decay of miniature black holes at hadronic colliders as might be possible in certain extra dimension models. It interfaces via the Les Houches accord to general purpose Monte Carlo programs like HERWIG and PYTHIA which then perform the parton evolution and hadronization. The event generator includes the extra-dimensional `grey-body' effects as well as the change in the temperature of the black hole as the decay progresses. Various options for modelling the Planck-scale terminal decay are provided.

C. M. Harris; P. Richardson; B. R. Webber

2003-07-24T23:59:59.000Z

300

BLACK HOLE ENTROPY IN HIGHER CURVATURE GRAVITY  

E-Print Network [OSTI]

We discuss some recent results on black hole thermodynamics within the context of effective gravitational actions including higher-curvature interactions. Wald's derivation of the First Law demonstrates that black hole entropy can always be expressed as a local geometric density integrated over a space-like cross-section of the horizon. In certain cases, it can also be shown that these entropy expressions satisfy a Second Law. One such simple example is considered from the class of higher curvature theories where the Lagrangian consists of a polynomial in the Ricci scalar.

TED JACOBSON; GUNGWON KANG; ROBERT C. MYERS

1995-02-27T23:59:59.000Z

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Quasilocal first law for black hole thermodynamics  

Science Journals Connector (OSTI)

We first show that stationary black holes satisfy an extremely simple quasilocal form of the first law, ?E=?¯8??A, where the (quasilocal) energy E=A/(8??) and (local) surface gravity ?¯=1/?, with A the horizon area and ? is a proper length characterizing the distance to the horizon of a preferred family of quasilocal observers suitable for thermodynamical considerations. Our construction is extended to the more general framework of isolated horizons. The local surface gravity is universal. This has important implications for semiclassical considerations of black hole physics as well as for the fundamental quantum description arising in the context of loop quantum gravity.

Ernesto Frodden; Amit Ghosh; Alejandro Perez

2013-06-24T23:59:59.000Z

302

Steady and unsteady calibration of multi-hole probes  

E-Print Network [OSTI]

This thesis presents the development of a data crographics. reduction algorithm for multi-hole pressure probes. The algorithm has been developed for the reduction of calibration data from miniature non-nulling multi-hole probes in compressible...

Johansen, Espen S

1998-01-01T23:59:59.000Z

303

What is the topology of a Schwarzschild black hole?  

E-Print Network [OSTI]

We investigate the topology of Schwarzschild's black hole through the immersion of this space-time in spaces of higher dimension. Through the immersions of Kasner and Fronsdal we calculate the extension of the Schwarzschild's black hole.

Edmundo M. Monte

2011-11-24T23:59:59.000Z

304

Chapter 3 Topology and Uniqueness of Higher Dimensional Black Holes  

Science Journals Connector (OSTI)

......of Particle and Nuclear Studies, High Energy Accelerator Research Organization...asymptotically flat vacuum black holes in...of Particle and Nuclear Studies, High Energy Accelerator Research Organization...asymptotically flat vacuum black holes in......

Daisuke Ida; Akihiro Ishibashi; Tetsuya Shiromizu

2011-06-01T23:59:59.000Z

305

Thought Experiment to resolve the Black Hole Information Paradox  

E-Print Network [OSTI]

We propose a combination of two mechanisms that can resolve the black hole information paradox. The first process is that the black hole shrinks by a first order transition, since we assume the entropy is discontinuous. The black hole disappears. The second type of processes conserves unitarity. We assume that within the black hole micro-reversible quantum mechanical processes take place. These are ordinary particle processes, e.g. the decay of an electron and a positron into two photons.

Kay zum Felde

2014-07-22T23:59:59.000Z

306

E-Print Network 3.0 - austrian mineral water Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

mines may affect air quality. As with water pollution, mines can contribute to air pollution... Chapter 15 Mineral Resources and the Environment 12;Minerals ... Source: Pan,...

307

E-Print Network 3.0 - areal bone mineral Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

(DXA)-derived areal bone mineral density (BMD) and reductions in vertebral fracture incidence... than the bone volume fraction (mineralized bone volumebulk volume).12...

308

E-Print Network 3.0 - affecting bone mineral Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of remodeling on the mineralization of bone... of therapies that reduce the risk of fracture, increase bone mineral density or change the biochemical markers... mass and...

309

E-Print Network 3.0 - activity bone mineral Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of remodeling on the mineralization of bone... of therapies that reduce the risk of fracture, increase bone mineral density or change the biochemical markers... mass and...

310

Integrating Steel Production with Mineral Carbon Sequestration  

SciTech Connect (OSTI)

The objectives of the project were (i) to develop a combination iron oxide production and carbon sequestration plant that will use serpentine ores as the source of iron and the extraction tailings as the storage element for CO2 disposal, (ii) the identification of locations within the US where this process may be implemented and (iii) to create a standardized process to characterize the serpentine deposits in terms of carbon disposal capacity and iron and steel production capacity. The first objective was not accomplished. The research failed to identify a technique to accelerate direct aqueous mineral carbonation, the limiting step in the integration of steel production and carbon sequestration. Objective (ii) was accomplished. It was found that the sequestration potential of the ultramafic resource surfaces in the US and Puerto Rico is approximately 4,647 Gt of CO2 or over 500 years of current US production of CO2. Lastly, a computer model was developed to investigate the impact of various system parameters (recoveries and efficiencies and capacities of different system components) and serpentinite quality as well as incorporation of CO2 from sources outside the steel industry.

Klaus Lackner; Paul Doby; Tuncel Yegulalp; Samuel Krevor; Christopher Graves

2008-05-01T23:59:59.000Z

311

Microtubule-templated biomimetic mineralization of lepidocrocite.  

SciTech Connect (OSTI)

Protein microtubules (MTs) 25 nm in diameter and tens of micrometers long have been used as templates for the biomimetic mineralization of FeOOH. Exposure of MTs to anaerobic aqueous solutions of Fe{sup 2+} buffered to neutral pH followed by aerial oxidation leads to the formation of iron oxide coated MTs. The iron oxide layer was found to grow via a two-step process: initially formed 10-30 nm thick coatings were found to be amorphous in structure and comprised of several iron-containing species. Further growth resulted in MTs coated with highly crystalline layers of lepidocrocite with a controllable thickness of up to 125 nm. On the micrometer size scale, these coated MTs were observed to form large, irregular bundles containing hundreds of individually coated MTs. Iron oxide grew selectively on the MT surface, a result of the highly charged MT surface that provided an interface favorable for iron oxide nucleation. This result illustrates that MTs can be used as scaffolds for the in-situ production of high-aspect-ratio inorganic nanowires.

Bunker, Bruce Conrad; Headley, Thomas Jeffrey; Tissot, Ralph George, Jr.; Boal, Andrew Kiskadden

2003-08-01T23:59:59.000Z

312

Durability Testing of Fluidized Bed Steam Reforming Products  

SciTech Connect (OSTI)

Fluidized Bed Steam Reforming (FBSR) is being considered as a potential technology for the immobilization of a wide variety of radioactive wastes but especially aqueous high sodium wastes at the Hanford site, at the Idaho National Laboratory (INL), and at the Savannah River Site (SRS). The FBSR technology converts organic compounds to CO{sub 2} and H{sub 2}O, converts nitrate/nitrite species to N{sub 2}, and produces a solid residue through reactions with superheated steam, the fluidizing media. If clay is added during processing a ''mineralized'' granular waste form can be produced. The mineral components of the waste form are primarily Na-Al-Si (NAS) feldspathoid minerals with cage-like and ring structures and iron bearing spinel minerals. The cage and ring structured minerals atomically bond radionuclides like Tc{sup 99} and Cs{sup 137} and anions such as SO{sub 4}, I, F, and Cl. The spinel minerals appear to stabilize Resource Conservation and Recovery Act (RCRA) hazardous species such as Cr and Ni. Durability testing of the FBSR products was performed using ASTM C1285 (Product Consistency Test) and the Environmental Protection Agency (EPA) Toxic Characteristic Leaching Procedure (TCLP). The FBSR mineral products (bed and fines) evaluated in this study were found to be two orders of magnitude more durable than the Hanford Low Activity Waste (LAW) glass requirement of 2 g/m{sup 2} release of Na{sup +}. The PCT responses for the FBSR samples tested were consistent with results from previous FBSR Hanford LAW product testing. Differences in the response can be explained by the minerals formed and their effects on PCT leachate chemistry.

JANTZEN, CAROL M.; PAREIZS, JOHN M.; LORIER, TROY H.; MARRA, JAMES C.

2005-07-01T23:59:59.000Z

313

Quantitative room-temperature mineralization of airborne formaldehyde using  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Quantitative room-temperature mineralization of airborne formaldehyde using Quantitative room-temperature mineralization of airborne formaldehyde using manganese oxide catalysts Title Quantitative room-temperature mineralization of airborne formaldehyde using manganese oxide catalysts Publication Type Journal Article Year of Publication 2011 Authors Sidheswaran, Meera A., Hugo Destaillats, Douglas P. Sullivan, Joern Larsen, and William J. Fisk Journal Applied Catalysis B - Environmental Issue 107 Pagination 34-41 Date Published 2011 Keywords commercial building ventilation & indoor environmental quality group, commercial building ventilation and indoor environmental quality group, energy analysis and environmental impacts department, indoor environment department, indoor environment group DOI 10.1016/j.apcatb.2011.06.032 Attachment Size

314

The third law of thermodynamics for Kerr black holes  

Science Journals Connector (OSTI)

......research-article Articles The third law of thermodynamics for Kerr black holes Isao...condition under which the third law of black-hole thermodynamics for Kerr holes is not violated...diverge to infinity as a power law for , and therefore no Kerr......

Isao Okamoto; Osamu Kaburaki

1991-05-15T23:59:59.000Z

315

Geodesic study of a charged black hole  

E-Print Network [OSTI]

The behavior of the timelike and null geodesics of charged E. Ay$\\acute{o}$n-Beato and A. Garcia (ABG) black hole are investigated. For circular and radial geodesics, we investigate all the possible motions by plotting the effective potentials for different parameters. In conclusion, we have shown that there is no phenomenon of \\textit{superradiance} in this case.

Mehedi Kalam; Nur Farhad; Sk. Monowar Hossein

2013-03-17T23:59:59.000Z

316

Black Holes and Sub-millimeter Dimensions  

E-Print Network [OSTI]

Recently, a new framework for solving the hierarchy problem was proposed which does not rely on low energy supersymmetry or technicolor. The fundamental Planck mass is at a TeV and the observed weakness of gravity at long distances is due the existence of new sub-millimeter spatial dimensions. In this letter, we study how the properties of black holes are altered in these theories. Small black holes---with Schwarzschild radii smaller than the size of the new spatial dimensions---are quite different. They are bigger, colder, and longer-lived than a usual $(3+1)$-dimensional black hole of the same mass. Furthermore, they primarily decay into harmless bulk graviton modes rather than standard-model degrees of freedom. We discuss the interplay of our scenario with the holographic principle. Our results also have implications for the bounds on the spectrum of primordial black holes (PBHs) derived from the photo-dissociation of primordial nucleosynthesis products, distortion of the diffuse gamma-ray spectrum, overcl...

Argyres, Philip C; March-Russell, John David; Argyres, Philip C.; Dimopoulos, Savas; March-Russell, John

1998-01-01T23:59:59.000Z

317

Retarded cores, black holes and galaxy formation  

Science Journals Connector (OSTI)

... It seems likely that elliptical galaxies contain massive 'black holes'?objects collapsed within their Schwarzschild radii?in their nuclei (see, for example, Wolfe and Burbidge2). The principal ... seems to be required to power the observed phenomena. For such a mass, the Schwarzschild radius (R s) is about 10?4 pc; for a mass of 1011 ...

John Gribbin

1974-12-06T23:59:59.000Z

318

Schwarzschild black hole in dark energy background  

E-Print Network [OSTI]

In this paper we present an exact solution of Einstein's field equations describing the Schwarzschild black hole in dark energy background. It is also regarded as an embedded solution that the Schwarzschild black hole is embedded into the dark energy space producing Schwarzschild-dark energy black hole. It is found that the space-time geometry of Schwarzschild-dark energy solution is non-vacuum Petrov type $D$ in the classification of space-times. We study the energy conditions (like weak, strong and dominant conditions) for the energy-momentum tensor of the Schwarzschild-dark energy solution. We also find that the energy-momentum tensor of the Schwarzschild-dark energy solution violates the strong energy condition due to the negative pressure leading to a repulsive gravitational force of the matter field in the space-time. It is shown that the time-like vector field for an observer in the Schwarzschild-dark energy space is expanding, accelerating, shearing and non-rotating. We investigate the surface gravity and the area of the horizons for the Schwarzschild-dark energy black hole.

Ngangbam Ishwarchandra; Ng. Ibohal; K. Yugindro Singh

2014-09-27T23:59:59.000Z

319

Supermassive Black Hole Binaries: The Search Continues  

E-Print Network [OSTI]

Gravitationally bound supermassive black hole binaries (SBHBs) are thought to be a natural product of galactic mergers and growth of the large scale structure in the universe. They however remain observationally elusive, thus raising a question about characteristic observational signatures associated with these systems. In this conference proceeding I discuss current theoretical understanding and latest advances and prospects in observational searches for SBHBs.

Tamara Bogdanovic

2014-06-19T23:59:59.000Z

320

Chapter 8 Black Holes in Braneworld Models  

Science Journals Connector (OSTI)

......to the four-dimensional Schwarzschild solution, there is no room...deformed from an ordinary Schwarzschild black hole and the radiation...gravitational attraction from its mirror image on the other side of...The attraction from the mirror image will not be larger than......

Norihiro Tanahashi; Takahiro Tanaka

2011-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

SS433—a massive black hole?  

Science Journals Connector (OSTI)

... thin ring in a circular orbit at radius R = r GM/c2 around a Schwarzschild black hole of mass M, the two emission peaks will be at wavelengths given ... we would expect the profiles of the emission peaks at any given time to be mirror images of each other (at least on timescales longer than the orbital time). ...

R. J. TERLEVICH; J. E. PRINGLE

1979-04-19T23:59:59.000Z

322

Black Holes in 4 Nearby Radio Galaxies  

E-Print Network [OSTI]

We study the velocity dispersion profiles of the nuclei of NGC 1326, 2685, 5273 and 5838 in the CO first overtone band. There is evidence for a black hole (BH) in NGC 1326 and 5838. Gas is seen flowing out of the nuclear region of NGC 5273. We put upper limits on the nuclear BHs responsible for its activity and that of NGC 2685.

Mould, Jeremy; Cotter, Garret; Batt, David; Durre', Mark

2014-01-01T23:59:59.000Z

323

Remote down-hole well telemetry  

DOE Patents [OSTI]

The present invention includes an apparatus and method for telemetry communication with oil-well monitoring and recording instruments located in the vicinity of the bottom of gas or oil recovery pipes. Such instruments are currently monitored using electrical cabling that is inserted into the pipes; cabling has a short life in this environment, and requires periodic replacement with the concomitant, costly shutdown of the well. Modulated reflectance, a wireless communication method that does not require signal transmission power from the telemetry package will provide a long-lived and reliable way to monitor down-hole conditions. Normal wireless technology is not practical since batteries and capacitors have to frequently be replaced or recharged, again with the well being removed from service. RF energy generated above ground can also be received, converted and stored down-hole without the use of wires, for actuating down-hole valves, as one example. Although modulated reflectance reduces or eliminates the loss of energy at the sensor package because energy is not consumed, during the transmission process, additional stored extra energy down-hole is needed.

Briles, Scott D. (Los Alamos, NM); Neagley, Daniel L. (Albuquerque, NM); Coates, Don M. (Santa Fe, NM); Freund, Samuel M. (Los Alamos, NM)

2004-07-20T23:59:59.000Z

324

The Yucca Mountain Project prototype air-coring test, U12g tunnel, Nevada test site  

SciTech Connect (OSTI)

The Prototype Air-Coring Test was conducted at the Nevada Test Site (NTS) G-Tunnel facility to evaluate standard coring techniques, modified slightly for air circulation, for use in testing at a prospective nuclear waste repository at Yucca Mountain, Nevada. Air-coring technology allows sampling of subsurface lithology with minimal perturbation to ambient characteristic such as that required for exploratory holes near aquifers, environmental applications, and site characterization work. Two horizontal holes were cored, one 50 ft long and the other 150 ft long, in densely welded fractured tuff to simulate the difficult drilling conditions anticipated at Yucca Mountain. Drilling data from seven holes on three other prototype tests in nonwelded tuff were also collected for comparison. The test was used to establish preliminary standards of performance for drilling and dust collection equipment and to assess procedural efficiencies. The Longyear-38 drill achieved 97% recovery for HQ-size core (-2.5 in.), and the Atlas Copco dust collector (DCT-90) captured 1500 lb of fugitive dust in a mine environment with only minor modifications. Average hole production rates were 6-8 ft per 6-h shift in welded tuff and almost 20 ft per shift on deeper holes in nonwelded tuff. Lexan liners were successfully used to encapsulate core samples during the coring process and protect core properties effectively. The Prototype Air-Coring Test demonstrated that horizontal air coring in fractured welded tuff (to at least 150 ft) can be safely accomplished by proper selection, integration, and minor modification of standard drilling equipment, using appropriate procedures and engineering controls. The test also indicated that rig logistics, equipment, and methods need improvement before attempting a large-scale dry drilling program at Yucca Mountain.

Ray, J.M. [Los Alamos National Lab., NM (United States); Newsom, J.C. [Newsom Industries, Citrus Heights, CA (United States)

1994-12-01T23:59:59.000Z

325

The evaluation of micro-surfacing mixture design procedures and the effects of material variation on the test responses  

E-Print Network [OSTI]

. Precision Index Statements for Repeatability THE EFFECTS OF WATER, ADDITIVE AND MINERAL FILLER ON THE TEST RESPONSES OF THE MIXTURE DESIGN TESTS Page 45 63 63 66 General 66 Test Procedures 67 Analysis of Results Wet Cohesion Test (30 Minutes) Wet... 23. 30 minutes wet cohesion torque values against additive amounts with 8 percent water 84 FIGURE 24. 30 minutes wet cohesion torque values against mineral filler with 8 percent water 84 FIGURE 25. 30 minutes wet cohesion torque values against...

Andrews, Edward Mensah

2012-06-07T23:59:59.000Z

326

Mineral Deformation at Earth's Core-Mantle Boundary  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Mineral Deformation at Earth's Core-Mantle Boundary Print Mineral Deformation at Earth's Core-Mantle Boundary Print Earth is a dynamic planet in which convection takes place on the scale of thousands of kilometers. Because Earth is mostly solid (except for its liquid-iron outer core), this convection causes deformation of solid rocks by plastic flow. At the core-mantle boundary (CMB), 2900 km deep, seismologists have discovered that seismic waves travel faster in certain directions. This seismic anisotropy appears to be related to the deformation of the constituent minerals. To understand the deformation mechanisms of mineral phases at this depth, researchers from Yale and UC Berkeley re-created the ultrahigh pressures of the deep Earth at ALS Beamline 12.2.2 while conducting in situ x-ray diffraction experiments to probe changes in crystal orientations.

327

Mineral Deformation at Earth's Core-Mantle Boundary  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Mineral Deformation at Earth's Core-Mantle Boundary Print Mineral Deformation at Earth's Core-Mantle Boundary Print Earth is a dynamic planet in which convection takes place on the scale of thousands of kilometers. Because Earth is mostly solid (except for its liquid-iron outer core), this convection causes deformation of solid rocks by plastic flow. At the core-mantle boundary (CMB), 2900 km deep, seismologists have discovered that seismic waves travel faster in certain directions. This seismic anisotropy appears to be related to the deformation of the constituent minerals. To understand the deformation mechanisms of mineral phases at this depth, researchers from Yale and UC Berkeley re-created the ultrahigh pressures of the deep Earth at ALS Beamline 12.2.2 while conducting in situ x-ray diffraction experiments to probe changes in crystal orientations.

328

Stewart Mineral Springs Pool & Spa Low Temperature Geothermal Facility |  

Open Energy Info (EERE)

Mineral Springs Pool & Spa Low Temperature Geothermal Facility Mineral Springs Pool & Spa Low Temperature Geothermal Facility Jump to: navigation, search Name Stewart Mineral Springs Pool & Spa Low Temperature Geothermal Facility Facility Stewart Mineral Springs Sector Geothermal energy Type Pool and Spa Location Weed, California Coordinates 41.4226498°, -122.3861269° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

329

Geology and Mineral Deposits of Churchill County, Nevada | Open Energy  

Open Energy Info (EERE)

Geology and Mineral Deposits of Churchill County, Nevada Geology and Mineral Deposits of Churchill County, Nevada Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Geology and Mineral Deposits of Churchill County, Nevada Abstract Churchill County, in west-central Nevada, is an area of varied topography and geology that has had a rather small total mineral production. The western part of the county is dominated by the broad low valley of the Carson Sink, which is underlain by deposits of Lake Lahontan. The bordering mountain ranges to the west and south are of low relief and underlain largely by Tertiary volcanic and sedimentary units. Pre-Tertiary rocks are extensively exposed east of the Carson Sink in the Stillwater Range, Clan Alpine Mountains, Augusta Mountains, and New Pass Mountains. The eastern

330

Hyperspectral Mineral Mapping For Geothermal Exploration On The...  

Open Energy Info (EERE)

and X-ray diffraction analyses of samples collected in the field. We are in the process of producing and validating mineral maps that will be used to narrow the scope of...

331

The Role of Mineral Carbonation in Carbon Capture  

Science Journals Connector (OSTI)

A number of aqueous-phase-based indirect mineral carbonation studies have focused on enhancing the reactivity of Mg-silicates through the addition of weak acids and additives that increase silicate dissolution...

Prof. Jennifer Wilcox

2012-01-01T23:59:59.000Z

332

Carbon Mineralization: From Natural Analogues to Engineered Systems  

Science Journals Connector (OSTI)

...environments: A short review. Geomicrobiol J 20...Biodiesel Production. BioEnergy Res 1:20-43 Schlesinger...mineral carbonation: Literature review update 2005-2007...biomass feedstocks: Review analysis of the biochemistry...

Ian M. Power; Anna L. Harrison; Gregory M. Dipple; Siobhan A. Wilson; Peter B. Kelemen; Michael Hitch; Gordon Southam

333

2005 Minerals Yearbook U.S. Department of the Interior  

E-Print Network [OSTI]

and installing energy efficient burners in the driers has rewarded SVM by increased efficiency and energy savings. These minerals were extracted primarily in California and Turkey and to a lesser extent in Argentina, Bolivia

334

U.S. Geological Survey China's Growing Appetite for Minerals  

E-Print Network [OSTI]

: Coal 45 1 Oil 4.7 6 Industrial minerals: Cement 42 1 Fluorspar 55 1 Rare earths 85 1 Metals: Aluminum Republic of Korea Thailand Other Asian Crisis 1997 #12;Production Flow for Cement #12;Country-Level Ou

335

Prospects for Offshore Mineral Mining Remain in Doubt  

Science Journals Connector (OSTI)

Prospects for Offshore Mineral Mining Remain in Doubt ... Oil and gas exploration and exploitation offshore have been well established, and such sources are already supplying considerable quantities of energy and chemicals to the world economy. ...

JOSEPH HAGGIN

1988-11-07T23:59:59.000Z

336

Earth's most abundant mineral finally has a name | Argonne National...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of effort to find, identify and characterize a mineral that makes up 38 percent of the Earth. And in doing so, a team of scientists led by Oliver Tschauner, a mineralogist at the...

337

Mineral Deformation at Earth's Core-Mantle Boundary  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Mineral Deformation at Earth's Core-Mantle Boundary Print Earth is a dynamic planet in which convection takes place on the scale of thousands of kilometers. Because Earth is mostly...

338

Climate VISION: Private Sector Initiatives: Minerals: GHG Information  

Office of Scientific and Technical Information (OSTI)

GHG Information Read the Industrial Minerals Association - North America (IMA-NA) 2011 Greenhouse Gas and Energy Survey Industry Summary for the period from 2000 to 2010 (PDF 16...

339

Mineralization of Surfactants by the Microbiota of Submerged Plant Detritus  

Science Journals Connector (OSTI)

...potentially significant site for surfactant removal in detritus-rich...APPL. ENVIRON. MICROBIOL. SURFACTANT MINERALIZATION BY DETRITUS...community structure in subsurface soils. Ground Water 24:365-374...Arylsulfatase activity of soils. Soil Sci. Soc. Am. Proc...

Thomas W. Federle; Roy M. Ventullo

1990-02-01T23:59:59.000Z

340

Select Minerals and Potable Use of Reclaimed Wastewaters  

E-Print Network [OSTI]

The long-observed relationships of an influence of drinking water mineral content on heart-circulatory deaths are developed to indicate that sodium -- when present in sufficiently high concentrations -- may be detrimental to human health...

Wolf, H.

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Principal physicochemical parameters of natural mineral-forming fluids  

Science Journals Connector (OSTI)

The authors’ database (which includes data from more than 17500 publications on fluid and melt inclusions in minerals) was used to generalize information on the principal physicochemical parameters of natural ...

V. B. Naumov; V. A. Dorofeeva; O. F. Mironova

2009-08-01T23:59:59.000Z

342

Phosphate Minerals: Their Properties and General Modes of Occurrence  

Science Journals Connector (OSTI)

This chapter presents a review of the physical, chemical and crystallographic properties of phosphate minerals, and discusses their general modes of occurrence. It provides the necessary backdrop to the subseq...

Jerome O. Nriagu

1984-01-01T23:59:59.000Z

343

DOE - Office of Legacy Management -- Foote Mineral Co - PA 27  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Foote Mineral Co - PA 27 Foote Mineral Co - PA 27 FUSRAP Considered Sites Site: Foote Mineral Co. (PA.27 ) Eliminated from further consideration under FUSRAP Designated Name: Not Designated Alternate Name: None Location: Exton , Pennsylvania PA.27-1 Evaluation Year: 1987 PA.27-1 Site Operations: Processed rare earth, principally zirconium and monazite sand was processed on a pilot-plant scale. PA.27-2 Site Disposition: Eliminated - Limited quantity of material handled - Potential for contamination considered remote PA.27-1 Radioactive Materials Handled: Yes Primary Radioactive Materials Handled: Zirconium, Possibly Uranium PA.27-1 PA.27-2 PA.27-3 Radiological Survey(s): None Indicated Site Status: Eliminated from further consideration under FUSRAP Also see Documents Related to Foote Mineral Co.

344

Indian Mineral Leasing Act of 1938 | Open Energy Information  

Open Energy Info (EERE)

Act of 1938 Act of 1938 Jump to: navigation, search Statute Name Indian Mineral Leasing Act Year 1938 Url IndianMineralLeasing1938.jpg Description Provides for leasing of minerals on tribal lands References IMLA[1] United States v. Navajo Nation[2] The Indian Mineral Leasing Act of 1938 (IMLA) provides that "[u]nallotted lands within any Indian reservation," or otherwise under federal jurisdiction, "may, with the approval of the Secretary [of the Interior (Secretary)] ... , be leased for mining purposes, by authority of the tribal council or other authorized spokesmen for such Indians." 25 U.S.C. § 396a. The Act aims to provide Indian tribes with a profitable source of revenue and to foster tribal self-determination by giving Indians a greater

345

Mineral Deformation at Earth's Core-Mantle Boundary  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Mineral Deformation at Earth's Core-Mantle Boundary Print Mineral Deformation at Earth's Core-Mantle Boundary Print Earth is a dynamic planet in which convection takes place on the scale of thousands of kilometers. Because Earth is mostly solid (except for its liquid-iron outer core), this convection causes deformation of solid rocks by plastic flow. At the core-mantle boundary (CMB), 2900 km deep, seismologists have discovered that seismic waves travel faster in certain directions. This seismic anisotropy appears to be related to the deformation of the constituent minerals. To understand the deformation mechanisms of mineral phases at this depth, researchers from Yale and UC Berkeley re-created the ultrahigh pressures of the deep Earth at ALS Beamline 12.2.2 while conducting in situ x-ray diffraction experiments to probe changes in crystal orientations.

346

Hyperspectral mineral mapping in support of geothermal exploration-  

Open Energy Info (EERE)

mineral mapping in support of geothermal exploration- mineral mapping in support of geothermal exploration- Examples from Long Valley Caldera, CA and Dixie Valley, NV, USA Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Hyperspectral mineral mapping in support of geothermal exploration- Examples from Long Valley Caldera, CA and Dixie Valley, NV, USA Abstract N/A Authors B. A. Martini, E. A. Silver, W. L. Pickles and P. A. Cocks Conference Geothermal Resources Council Annual Meeting; Morelia, Mexico; 2004 Published Geothermal Resources Council Annual Meeting;, 2004 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Hyperspectral mineral mapping in support of geothermal exploration- Examples from Long Valley Caldera, CA and Dixie Valley, NV, USA

347

Structural characterization and vibrational spectroscopy of the arsenate mineral wendwilsonite  

Science Journals Connector (OSTI)

Abstract In this paper, we have investigated on the natural wendwilsonite mineral with the formulae Ca2(Mg,Co)(AsO4)2?2(H2O). Raman spectroscopy complimented with infrared spectroscopy has been used to determine the molecular structure of the wendwilsonite arsenate mineral. A comparison is made with the roselite mineral group with formula Ca2B(AsO4)2?2H2O (where B may be Co, Fe2+, Mg, Mn, Ni, Zn). The Raman spectra of the arsenate related to tetrahedral arsenate clusters with stretching region shows strong differences between that of wendwilsonite and the roselite arsenate minerals which is attributed to the cation substitution for calcium in the structure. The Raman arsenate (AsO4)3? stretching region shows strong differences between that of wendwilsonite and the roselite arsenate minerals which is attributed to the cation substitution for calcium in the structure. In the infrared spectra complexity exists of multiple to tetrahedral (AsO4)3? clusters with antisymmetric stretching vibrations observed indicating a reduction of the tetrahedral symmetry. This loss of degeneracy is also reflected in the bending modes. Strong Raman bands around 450 cm?1 are assigned to ?4 bending modes. Multiple bands in the 350–300 cm?1 region assigned to ?2 bending modes provide evidence of symmetry reduction of the arsenate anion. Three broad bands for wendwilsonite found at 3332, 3119 and 3001 cm?1 are assigned to OH stretching bands. By using a Libowitzky empirical equation, hydrogen bond distances of 2.65 and 2.75 Å are estimated. Vibrational spectra enable the molecular structure of the wendwilsonite mineral to be determined and whilst similarities exist in the spectral patterns with the roselite mineral group, sufficient differences exist to be able to determine the identification of the minerals.

Ray L. Frost; Ricardo Scholz; Andrés López; Fernanda Maria Belotti; Yunfei Xi

2014-01-01T23:59:59.000Z

348

Geology of the USW SD-12 drill hole Yucca Mountain, Nevada  

SciTech Connect (OSTI)

Drill hole USW SD-12 is one of several holes drilled under Site Characterization Plan Study 8.3.1.4.3.1, also known as the {open_quotes}Systematic Drilling Program,{close_quotes} as part of the U.S. Department of Energy characterization program at Yucca Mountain, Nevada, which has been proposed as the potential location of a repository for high-level nuclear waste. The SD-12 drill hole is located in the central part of the potential repository area, immediately to the west of the Main Test Level drift of the Exploratory Studies Facility and slightly south of midway between the North Ramp and planned South Ramp declines. Drill hole USW SD-12 is 2166.3 ft (660.26 m) deep, and the core recovered essentially complete sections of ash-flow tuffs belonging to the lower half of the Tiva Canyon Tuff, the Pah Canyon Tuff, and the Topopah Spring Tuff, all of which are part of the Miocene Paintbrush Group. A virtually complete section of the Calico Hills Formation was also recovered, as was core from the entire Prow Pass Tuff formation of the Crater Flat Group.

Rautman, C.A. [Sandia National Labs., Albuquerque, NM (United States); Engstrom, D.A. [Spectra Research Institute, Albuquerque, NM (United States)

1996-11-01T23:59:59.000Z

349

Laser stabilization using spectral hole burning  

E-Print Network [OSTI]

We have frequency stabilized a Coherent CR699-21 dye laser to a transient spectral hole on the 606 nm transition in Pr^{+3}:Y_2SiO_5. A frequency stability of 1 kHz has been obtained on the 10 microsecond timescale together with a long-term frequency drift below 1 kHz/s. RF magnetic fields are used to repopulate the hyperfine levels allowing us to control the dynamics of the spectral hole. A detailed theory of the atomic response to laser frequency errors has been developed which allows us to design and optimize the laser stabilization feedback loop, and specifically we give a stability criterion that must be fulfilled in order to obtain very low drift rates. The laser stability is sufficient for performing quantum gate experiments in Pr^{+3}:Y_2SiO_5.

L. Rippe; B. Julsgaard; A. Walther; S. Kröll

2006-11-05T23:59:59.000Z

350

Geometric description of BTZ black holes thermodynamics  

E-Print Network [OSTI]

We study the properties of the space of thermodynamic equilibrium states of the Ba\\~nados-Teitelboim-Zanelli (BTZ) black hole in (2+1)-gravity. We use the formalism of geometrothermodynamics to introduce in the space of equilibrium states a $2-$dimensional thermodynamic metric whose curvature is non-vanishing, indicating the presence of thermodynamic interaction, and free of singularities, indicating the absence of phase transitions. Similar results are obtained for generalizations of the BTZ black hole which include a Chern-Simons term and a dilatonic field. Small logarithmic corrections of the entropy turn out to be represented by small corrections of the thermodynamic curvature, reinforcing the idea that thermodynamic curvature is a measure of thermodynamic interaction.

Hernando Quevedo; Alberto Sanchez

2008-11-15T23:59:59.000Z

351

Hybrid black-hole binary initial data  

E-Print Network [OSTI]

Traditional black-hole binary puncture initial data is conformally flat. This unphysical assumption is coupled with a lack of radiation signature from the binary's past life. As a result, waveforms extracted from evolutions of this data display an abrupt jump. In Kelly et al. [Class.Quant.Grav.27:114005,2010], a new binary black-hole initial data with radiation contents derived in the post-Newtonian (PN) calculation was adapted to puncture evolutions in numerical relativity. This data satisfies the constraint equations to the 2.5PN order, and contains a transverse-traceless "wavy" metric contribution, violating the standard assumption of conformal flatness. Although the evolution contained less spurious radiation, there were undesired features; the unphysical horizon mass loss and the large initial orbital eccentricity. Introducing a hybrid approach to the initial data evaluation, we significantly reduce these undesired features.

Bruno C. Mundim; Bernard J. Kelly; Yosef Zlochower; Hiroyuki Nakano; Manuela Campanelli

2010-12-04T23:59:59.000Z

352

The high energy emission from black holes  

E-Print Network [OSTI]

The origin of the high energy emission (X-rays and gamma-rays) from black holes is still a matter of debate. We present new evidence that hard X-ray emission in the low/hard state may not be dominated by thermal Comptonization. We present an alternative scenario for the origin of the high energy emission that is well suited to explain the high energy emission from GRO J1655-40.

M. D. Caballero-Garcia; J. M. Miller; E. Kuulkers

2007-11-06T23:59:59.000Z

353

Black hole remnants in the early universe  

Science Journals Connector (OSTI)

We consider the production of primordial micro black holes (MBH) remnants in the early Universe. These objects induce the Universe to be in a matter-dominated era before the onset of inflation. Effects of such an epoch on the CMB power spectrum are discussed and computed both analytically and numerically. By comparison with the latest observational data from the WMAP collaboration, we find that our model appears to explain the quadrupole anomaly of the CMB power spectrum.

Fabio Scardigli; Christine Gruber; Pisin Chen

2011-03-09T23:59:59.000Z

354

Hole cleaning requirements with seabed returns  

E-Print Network [OSTI]

size and fluid density. The least important were rotary speed, feed concentration, annulus size, and drillpipe eccentricity. They also reported that, in Newtonian fluids, transport efficiency improves with increasing viscosity; however, they noted... is set; therefore, no marine riser can be utilized. The coring occurs up to 3000 ft below the seafloor with the bit cutting an 11. 438 in. hole. The rig pumps have a maximum output of 600 gpm under normal coring operations with untreated seawater...

Nordt, David Paul

1988-01-01T23:59:59.000Z

355

Comparing quantum black holes and naked singularities  

E-Print Network [OSTI]

There are models of gravitational collapse in classical general relativity which admit the formation of naked singularities as well as black holes. These include fluid models as well as models with scalar fields as matter. Even if fluid models were to be regarded as unphysical in their matter content, the remaining class of models (based on scalar fields) generically admit the formation of visible regions of finite but arbitrarily high curvature. Hence it is of interest to ask, from the point of view of astrophysics, as to what a stellar collapse leading to a naked singularity (or to a visible region of very high curvature) will look like, to a far away observer. The emission of energy during such a process may be divided into three phases - (i) the classical phase, during which matter and gravity can both be treated according to the laws of classical physics, (ii) the semiclassical phase, when gravity is treated classically but matter behaves as a quantum field, and (iii) the quantum gravitational phase. In this review, we first give a summary of the status of naked singularities in classical relativity, and then report some recent results comparing the semiclassical phase of black holes with the semiclassical phase of spherical collapse leading to a naked singularity. In particular, we ask how the quantum particle creation during the collapse leading to a naked singularity compares with the Hawking radiation from a star collapsing to form a black hole. It turns out that there is a fundamental difference between the two cases. A spherical naked star emits only about one Planck energy during its semiclassical phase, and the further evolution can only be determined by the laws of quantum gravity. This contrasts with the semiclassical evaporation of a black hole.

T. P. Singh

2000-12-21T23:59:59.000Z

356

Electromagnetic wave scattering by Schwarzschild black holes  

E-Print Network [OSTI]

We analyze the scattering of a planar monochromatic electromagnetic wave incident upon a Schwarzschild black hole. We obtain accurate numerical results from the partial wave method for the electromagnetic scattering cross section, and show that they are in excellent agreement with analytical approximations. The scattering of electromagnetic waves is compared with the scattering of scalar, spinor and gravitational waves. We present a unified picture of the scattering of all massless fields for the first time.

Luís C. B. Crispino; Sam R. Dolan; Ednilton S. Oliveira

2009-05-20T23:59:59.000Z

357

Spectral hole burning for stopping light  

SciTech Connect (OSTI)

We propose a protocol for storage and retrieval of photon wave packets in a {lambda}-type atomic medium. This protocol derives from spectral hole burning and takes advantages of the specific properties of solid-state systems at low temperature, such as rare-earth ion-doped crystals. The signal pulse is tuned to the center of the hole that has been burnt previously within the inhomogeneously broadened absorption band. The group velocity is strongly reduced, being proportional to the hole width. This way the optically carried information and energy are carried over to the off-resonance optical dipoles. Storage and retrieval are performed by conversion to and from ground-state Raman coherence by using brief {pi} pulses. The protocol exhibits some resemblance with the well-known electromagnetically induced transparency process. It also presents distinctive features such as the absence of coupling beam. In this paper we detail the various steps of the protocol, summarize the critical parameters, and theoretically examine the recovery efficiency.

Lauro, R.; Chaneliere, T.; Le Goueet, J.-L. [Laboratoire Aime Cotton, CNRS UPR3321, Universite Paris Sud, Batiment 505, Campus Universitaire, 91405 Orsay (France)

2009-05-15T23:59:59.000Z

358

Light Loop Echoes and Blinking Black Holes  

E-Print Network [OSTI]

Radiation emitted near a black hole reaches the observer by multiple paths; and when this radiation varies in time, the time-delays between the various paths generate a "blinking" effect in the observed light curve L(t) or its auto-correlation function xi(T)= . For the particularly important "face-on" configuration (in which the hole is viewed roughly along its spin axis, while the emission comes roughly from its equatorial plane -- e.g. from the inner edge of its accretion disk, or from the violent flash of a nearby/infalling star) we calculate the blinking in detail by computing the time delay Delta t_{j}(r,a) and magnification mu_{j}(r,a) of the jth path (j=1,2,3,...), relative to the primary path (j=0), as a function of the emission radius r and black hole spin 0

359

Dark jets in solar coronal holes  

E-Print Network [OSTI]

A new solar feature termed a dark jet is identified from observations of an extended solar coronal hole that was continuously monitored for over 44 hours by the EUV Imaging Spectrometer on board the Hinode spacecraft in 2011 February 8-10. Line-of-sight velocity maps derived from the coronal Fe XII $\\lambda$195.12 emission line, formed at 1.5 MK, revealed a number of large-scale, jet-like structures that showed significant blueshifts. The structures had either weak or no intensity signal in 193 A filter images from the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory, suggesting that the jets are essentially invisible to imaging instruments. The dark jets are rooted in bright points and occur both within the coronal hole and at the quiet Sun-coronal hole boundary. They exhibit a wide range of shapes, from narrow columns to fan-shaped structures, and sometimes multiple jets are seen close together. A detailed study of one dark jet showed line-of-sight speeds increasing along the jet axis fr...

Young, Peter R

2015-01-01T23:59:59.000Z

360

Quantization of rotating linear dilaton black holes  

E-Print Network [OSTI]

In this paper, we firstly prove that the adiabatic invariant quantity, which is commonly used in the literature for quantizing the rotating black holes (BHs) is fallacious. We then show how its corrected form should be. The main purpose of this paper is to study the quantization of 4-dimensional rotating linear dilaton black hole (RLDBH) spacetime describing with an action, which emerges in the Einstein-Maxwell-Dilaton-Axion (EMDA) theory. The RLDBH spacetime has a non-asymptotically flat (NAF) geometry. They reduces to the linear dilaton black hole (LDBH) metric when vanishing its rotation parameter $a$. While studying its scalar perturbations, it is shown that the Schr\\"odinger-like wave equation around the event horizon reduces to a confluent hypergeometric differential equation. Then the associated complex frequencies of the quasinormal modes (QNMs) are computed. By using those QNMs in the true definition of the rotational adiabatic invariant quantity, we obtain the quantum spectra of entropy/area for the RLDBH. It is found out that both spectra are discrete and equidistant. Besides, we reveal that the quantum spectra do not depend on $a$ in spite of the QNMs are modulated by it.

I. Sakalli

2014-06-19T23:59:59.000Z

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Identification of minerals and meteoritic materials via Raman techniques after capture in hypervelocity impacts on aerogel  

SciTech Connect (OSTI)

For this study, an extensive suite of mineral particles analogous to components of cosmic dust were tested to determine if their Raman signatures can be recognized after hypervelocity capture in aerogel. The mineral particles were mainly of greater than 20 micrometers in size and were accelerated onto the silica aerogel by light gas gun shots. It was found that all the individual minerals captured in aerogel could be subsequently identified using Raman (or fluorescent) spectra. The beam spot size used for the laser illumination was of the order of 5 micrometers, and in some cases the captured particles were of a similar small size. In some samples fired into aerogel there was observed a shift in the wavenumbers of some of the Raman bands, a result of the trapped particles being at quite high temperatures due to heating by the laser. Temperatures of samples under laser illumination were estimated from the relative intensities of Stokes and anti-Stokes Raman bands, or, in the case of ruby particles, from the wavenumber of fluorescence bands excited by the laser. It was found that the temperature of particles in aerogel varied greatly, dependent upon laser power and the nature of the particle. In the worst case, some particles were shown to have temperatures in the 500-700 C range at a laser power of about 3 mW at the sample. However most of the mineral particles examined at this laser power had temperatures below 200 C. This is sufficiently low a temperature not to damage most materials expected to be found captured in aerogel in space. In addition, selected meteorite samples were examined to obtain Raman signatures of their constituent minerals and were then shot into aerogel. It was possible to find several Raman signatures after capture in aerogel and obtain a Raman map of a whole grain in situ in the aerogel. Finally, a Raman analysis was carried out of a particle captured in aerogel in space and carbonaceous material identified. In general therefore it is concluded that Raman analysis is indeed well suited for an in-situ analysis of micrometer sized non-terrestrial materials captured in aerogel.

Burchell, M J; Mann, J; Creighton, J A; Kearsley, A; Graham, G A; Esposito, A P; Franchi, I A; Westphal, A J; Snead, C

2004-10-04T23:59:59.000Z

362

E:\CO2\wp_files\test_2.PDF  

Office of Scientific and Technical Information (OSTI)

DOE/ARC-2000-008 CARBON DIOXIDE SEQUESTRATION BY DIRECT MINERAL CARBONATION WITH CARBONIC ACID March 6-9, 2000 Proceedings of the 25 th International Technical Conf. On Coal Utilization & Fuel Systems, Coal Technology Assoc., Clear Water, FL by W.K. O'Connor, D.C. Dahlin, D.N. Nilsen, R.P. Walters and P.C. Turner Albany Research Center Albany, Oregon CARBON DIOXIDE SEQUESTRATION BY DIRECT MINERAL CARBONATION WITH CARBONIC ACID W. K. O'Connor, D. C. Dahlin, D. N. Nilsen, R. P. Walters, and P. C. Turner Albany Research Center Office of Fossil Energy U.S. Department of Energy ABSTRACT The Albany Research Center (ARC) of the U.S. Dept. of Energy (DOE) has been conducting a series of mineral carbonation tests at its Albany, Oregon, facility over the past 2 years as part of a Mineral

363

Random Testing versus Partition Testing.  

E-Print Network [OSTI]

?? The difference between Partition Testing and Random Testing has been thoroughlyinvestigated theoretically. In this thesis we present a practical study ofthe differences between random… (more)

Oftedal, Kristian

2011-01-01T23:59:59.000Z

364

Black hole perturbation in parity violating gravitational theories  

SciTech Connect (OSTI)

We study linear perturbations around static, spherically symmetric spacetimes in f(R,C) gravitational theories whose Lagrangians depend on the Ricci scalar R and the parity violating Chern-Simons term C. By an explicit construction, we show that the Hamiltonian for the perturbation variables is not bounded from below, suggesting that such a background spacetime is unstable against perturbations. This gives a strong limit on a phenomenological gravitational model which violates parity. We also show that either R=const or ({partial_derivative}{sup 2}f/{partial_derivative}R{partial_derivative}C)=0 is a necessary and sufficient condition for the stability. We then implement in detail the perturbation analysis for such theories which satisfy the stability conditions. For l{>=}2, where l is the usual integer for the multipole expansion, the number of propagating modes is three, one from the odd and the other two from the even, all of which propagate at the speed of light. Unlike in the case of f(R) theories, these modes are coupled to each other, which can be used as a distinctive feature to test the parity violating theories from observations. The no-ghost conditions and no-tachyon conditions are the same as those in f(R) theories. For the dipole perturbations, the odd and the even modes completely decouple. The odd mode gives a slowly rotating black hole solution whose metric is linearized in its angular momentum. We provide an integral expression of this solution. On the other hand, the even mode propagates at the speed of light. For the monopole perturbation, in addition to a mode which simply shifts the mass of the background black hole, there also exists one even mode that propagates at the speed of light.

Motohashi, Hayato [Department of Physics, Graduate School of Science, University of Tokyo, Tokyo 113-0033 (Japan); Research Center for the Early Universe (RESCEU), Graduate School of Science, University of Tokyo, Tokyo 113-0033 (Japan); Suyama, Teruaki [Research Center for the Early Universe (RESCEU), Graduate School of Science, University of Tokyo, Tokyo 113-0033 (Japan)

2011-10-15T23:59:59.000Z

365

Coke mineral transformations in the experimental blast furnace  

SciTech Connect (OSTI)

Blast furnace efficiency may be improved by optimizing coke reactivity. Some but not all forms of mineral matter in the coke modify its reactivity, but changes in mineral matter that occur within coke while in the blast furnace have not been fully quantified. To determine changes in mineral matter forms in the blast furnace, coke samples from a dissection study in the LKAB experimental blast furnace (EBF) were characterized using SEM/EDS analysis, EPMA (microprobe), and low-temperature ashing/quantitative XRD analysis. Variations in alkali concentration, particularly potassium, dominated the compositional changes. At high concentrations of potassium, the mineral matter was largely potassium-bearing but even more potassium was diffused throughout the coke and not associated with mineral matter. There was little difference in potassium concentration between the core and surface of the coke pieces, suggesting that potassium diffused rapidly through the whole coke. Iron, calcium, silicon, and aluminum concentrations were relatively constant in comparison, although the mineralogy of all elements changed significantly with changing temperature. 23 refs., 20 figs., 9 tabs.

Kelli Kazuberns; Sushil Gupta; Mihaela Grigore; David French; Richard Sakurovs; Mats Hallin; Bo Lindblom; Veena Sahajwalla [University of New South Wales, Sydney, NSW (Australia). Cooperative Research Centre for Coal in Sustainable Development (CCSD)

2008-09-15T23:59:59.000Z

366

Minerals leached into drinking water from rubber stoppers  

SciTech Connect (OSTI)

Drinking water and its delivery system are potential sources of variation in animal research. Concern arose that rubber stoppers used to cork water bottles might be a source of some nutritionally required minerals which could leach into drinking water. Six types of stoppers, each having different compositions, were cleaned with stainless-steel sipper tubes inserted into them and attached to polypropylene bottles filled with either deionized water (pH 4.5) or acidified-deionized water (pH 2.5). After six days of contact, water levels of copper, magnesium, iron, manganese, zinc, chromium, and selenium were determined by atomic absorption spectroscopy. Additionally, three of the stopper types were analyzed for mineral content. Minerals were present in both stoppers and drinking water. Acidified-deionized water generally leached minerals from the stoppers than did deionized water. The black stopper which is commonly used in animal facilities contained and leached measurable levels of some minerals, but it still can be recommended for typical animal husbandry uses, although other types of stoppers would be more suitable for specific nutritional and toxicologic studies.

Kennedy, B.W.; Beal, T.S. (Carbohydrate Nutrition Laboratory, Beltsville Human Nutrition Research Center, MD (United States))

1991-06-01T23:59:59.000Z

367

A Novel Approach to Experimental Studies of Mineral Dissolution Kinetics  

SciTech Connect (OSTI)

Currently, DOE is conducting pilot CO{sub 2} injection tests to evaluate the concept of geological sequestration. One strategy that potentially enhances CO{sub 2} solubility and reduces the risk of CO{sub 2} leak back to the surface is dissolution of indigenous minerals in the geological formation and precipitation of secondary carbonate phases, which increases the brine pH and immobilizes CO{sub 2}. Clearly, the rates at which these dissolution and precipitation reactions occur directly determine the efficiency of this strategy. However, one of the fundamental problems in modern geochemistry is the persistent two to five orders of magnitude discrepancy between laboratory-measured and field derived feldspar dissolution rates. To date, there is no real guidance as to how to predict silicate reaction rates for use in quantitative models. Current models for assessment of geological carbon sequestration have generally opted to use laboratory rates, in spite of the dearth of such data for compositionally complex systems, and the persistent disconnect between lab and field applications. Therefore, a firm scientific basis for predicting silicate reaction kinetics in CO{sub 2} injected geological formations is urgently needed to assure the reliability of the geochemical models used for the assessments of carbon sequestration strategies. The funded experimental and theoretical study attempts to resolve this outstanding scientific issue by novel experimental design and theoretical interpretation to measure silicate dissolution rates and iron carbonate precipitation rates at conditions pertinent to geological carbon sequestration. In the first year of the project, we have successfully developed a sample preparation method and completed three batch feldspar dissolution experiments at 200 C and 300 bars. The changes of solution chemistry as dissolution experiments progressed were monitored with on-line sampling of the aqueous phase at the constant temperature and pressure. These data allow calculating overall apparent feldspar dissolution rates and secondary mineral precipitation rates as a function of saturation states. State-of-the-art atomic resolution transmission electron microscopy (TEM), scanning electron microscopy, and electron microprobe was used to characterize the reactants (feldspars before experiments). We experimented with different sample preparation methods for TEM study, and found excellent images and chemical resolution with reactants, which shows promise of the technology and establishes the baseline for comparison with products (feldspars after the experiments). Preliminary electron microscopic characterization shows that the reacted feldspars have etch pits and are covered with secondary sheet silicate phases. Reaction-path geochemical modeling is used to interpret the experimental results. We have established the software and database, and are making great progress. Also during the first year, our education goal of graduate student training has been achieved. A Ph. D. student at Indiana University is progressing well in the degree program and has taken geochemical modeling, SEM, and TEM courses, which will facilitate research in the second and third year. A Ph. D. student at University of Minnesota is progressing well in conducting the experiments, and is near graduation. With the success of training of graduate students and excellent experimental data in the first year, we anticipate a more fruitful year in the second year.

Chen Zhu; William E. Seyfried

2005-01-01T23:59:59.000Z

368

K-Shell-Hole Production, Multiple-Hole Production, Charge-Transfer, and Antisymmetry  

E-Print Network [OSTI]

-shell electron can occur. For example, after making a K-shell hole an L-shell electron may be knocked into it, or an L-shell vacancy may be produced and the K-shell electron promoted to that vacancy in the "Fermi sea" of the target-atom orbitals, In 1973 a.... If one is working in first-order pertur- bation theory E-shell-hole production is correctly obtained by calculating the process for the K elec- tron to be lifted above the "Fermi sea" of occupied target orbitals, i.e., the other electrons play a...

Reading, John F.; Ford, A. Lewis.

1980-01-01T23:59:59.000Z

369

Video: Part of the 'Hole' Story (of Uranium Hexafluoride Cylinders)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Hole Story Hole Story Part of the "Hole" Story (of Uranium Hexafluoride Cylinders) Holes in the depleted Uranium Hexafluoride storage cylinders are investigated. It is shown that corrosion products cause the openings to be self-healing. View this Video in Real Player format Download free RealPlayer SP Highlights of the Video: Video 00:00 Part of the 'Hole' Story Video 00:05 One of the depleted UF6 cylinder storage lots at Portsmouth Video 00:28 48G cylinders, each containing 14 tons of depleted UF6, in storage Video 00:52 Stacked 48G cylinders Video 01:35 UF6 sealed in glass tube Video 02:01 A lifting lug of one cylinder damaging a neighboring cylinder Video 02:37 Damage to small hole cylinder from impact with a lifting lub of an adjoining cylinder

370

Articles which include chevron film cooling holes, and related processes  

DOE Patents [OSTI]

An article is described, including an inner surface which can be exposed to a first fluid; an inlet; and an outer surface spaced from the inner surface, which can be exposed to a hotter second fluid. The article further includes at least one row or other pattern of passage holes. Each passage hole includes an inlet bore extending through the substrate from the inlet at the inner surface to a passage hole-exit proximate to the outer surface, with the inlet bore terminating in a chevron outlet adjacent the hole-exit. The chevron outlet includes a pair of wing troughs having a common surface region between them. The common surface region includes a valley which is adjacent the hole-exit; and a plateau adjacent the valley. The article can be an airfoil. Related methods for preparing the passage holes are also described.

Bunker, Ronald Scott; Lacy, Benjamin Paul

2014-12-09T23:59:59.000Z

371

Method and apparatus of assessing down-hole drilling conditions  

DOE Patents [OSTI]

A method and apparatus for use in assessing down-hole drilling conditions are disclosed. The apparatus includes a drill string, a plurality of sensors, a computing device, and a down-hole network. The sensors are distributed along the length of the drill string and are capable of sensing localized down-hole conditions while drilling. The computing device is coupled to at least one sensor of the plurality of sensors. The data is transmitted from the sensors to the computing device over the down-hole network. The computing device analyzes data output by the sensors and representative of the sensed localized conditions to assess the down-hole drilling conditions. The method includes sensing localized drilling conditions at a plurality of points distributed along the length of a drill string during drilling operations; transmitting data representative of the sensed localized conditions to a predetermined location; and analyzing the transmitted data to assess the down-hole drilling conditions.

Hall, David R. (Provo, UT); Pixton, David S. (Lehl, UT); Johnson, Monte L. (Orem, UT); Bartholomew, David B. (Springville, UT); Fox, Joe (Spanish Fork, UT)

2007-04-24T23:59:59.000Z

372

Application of the Cubed-Sphere Grid to Tilted Black-Hole Accretion Disks  

SciTech Connect (OSTI)

In recent work we presented the first results of global general relativistic magnetohydrodynamic (GRMHD) simulations of tilted (or misaligned) accretion disks around rotating black holes. The simulated tilted disks showed dramatic differences from comparable untilted disks, such as asymmetrical accretion onto the hole through opposing 'plunging streams' and global precession of the disk powered by a torque provided by the black hole. However, those simulations used a traditional spherical-polar grid that was purposefully underresolved along the pole, which prevented us from assessing the behavior of any jets that may have been associated with the tilted disks. To address this shortcoming we have added a block-structured 'cubed-sphere' grid option to the Cosmos++ GRMHD code, which will allow us to simultaneously resolve the disk and polar regions. Here we present our implementation of this grid and the results of a small suite of validation tests intended to demonstrate that the new grid performs as expected. The most important test in this work is a comparison of identical tilted disks, one evolved using our spherical-polar grid and the other with the cubed-sphere grid. We also demonstrate an interesting dependence of the early-time evolution of our disks on their orientation with respect to the grid alignment. This dependence arises from the differing treatment of current sheets within the disks, especially whether they are aligned with symmetry planes of the grid or not.

Fragile, P C; Lindner, C C; Anninos, P; Salmonson, J D

2008-09-24T23:59:59.000Z

373

Hyperspectral Mineral Mapping For Geothermal Exploration On The Pyramid  

Open Energy Info (EERE)

Hyperspectral Mineral Mapping For Geothermal Exploration On The Pyramid Hyperspectral Mineral Mapping For Geothermal Exploration On The Pyramid Lake Paiute Reservation, Nevada Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Hyperspectral Mineral Mapping For Geothermal Exploration On The Pyramid Lake Paiute Reservation, Nevada Details Activities (2) Areas (1) Regions (0) Abstract: Over 2000 km2 (772 mi2) of 5 m resolution Hymap hyperspectral data was acquired over the Pyramid Lake Paiute Reservation in the Fall of 2004. Subsequent image processing and data analysis has identified reflectance spectra for alunite, kaolinite/halloysite, illite, gypsum, vegetation, and carbonate. A portable spectrometer is being used for in situ validation, along with laboratory measurements and X-ray diffraction analyses of samples collected in the field. We are in the process of

374

STATE OF OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

OREGON OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES Portland, Oregon 97201 910 State Office Building r DOE/ID/12526--T2 OPEN-FILE REPORT 0-86-3 DE87 013077 INVESTIGATION OF THE TEIERMAL REGIME AND GEOLOGIC HISTORY OF THE DRILLING IN THE CASCADE RANGE CASCADE VOLCANIC ARC: FIRST PHASE OF A PROGRAM FOR SCIENTIFIC Prepared by George R . Priest Oregon Department of Geology and Mineral Industries Preparation and publication of this document were supported b the Ore on Department of Geology and Mineral Industries and Grant No. DE-%G07-841&.2526 from the U . S . Department of Energy DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency Thereof, nor any of their employees,

375

DOE - Office of Legacy Management -- International Minerals and Chemical  

Office of Legacy Management (LM)

International Minerals and Chemical International Minerals and Chemical Corp - Pilot Plant - FL 02 FUSRAP Considered Sites Site: International Minerals and Chemical Corp - Pilot Plant (FL.02) Designated Name: Not Designated Alternate Name: None Location: Mulberry , Florida FL.02-1 Evaluation Year: 1985 FL.02-2 Site Operations: Erected and operated a pilot plant to process material from the leached zone of the Florida pebble phosphate field for the recovery of uranium and other saleable products and also conducted experimental investigations to recover uranium from phosphates. FL.02-3 FL.02-4 Site Disposition: Eliminated - No Authority FL.02-6 Radioactive Materials Handled: Yes Primary Radioactive Materials Handled: Uranium FL.02-3 FL.02-4 Radiological Survey(s): Yes FL.02-1

376

Buckhorn Mineral Wells Pool & Spa Low Temperature Geothermal Facility |  

Open Energy Info (EERE)

Buckhorn Mineral Wells Pool & Spa Low Temperature Geothermal Facility Buckhorn Mineral Wells Pool & Spa Low Temperature Geothermal Facility Facility Buckhorn Mineral Wells Sector Geothermal energy Type Pool and Spa Location Mesa, Arizona Coordinates 33.4222685°, -111.8226402° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

377

Mineral Recovery from Geothermal Fluids | Open Energy Information  

Open Energy Info (EERE)

Mineral Recovery from Geothermal Fluids Mineral Recovery from Geothermal Fluids Jump to: navigation, search Geothermal ARRA Funded Projects for Mineral Recovery from Geothermal Fluids Loading map... {"format":"googlemaps3","type":"ROADMAP","types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"limit":200,"offset":0,"link":"all","sort":[""],"order":[],"headers":"show","mainlabel":"","intro":"","outro":"","searchlabel":"\u2026 further results","default":"","geoservice":"google","zoom":false,"width":"600px","height":"350px","centre":false,"layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","icon":"","visitedicon":"","forceshow":true,"showtitle":true,"hidenamespace":false,"template":false,"title":"","label":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"locations":[{"text":"

378

Underground radio technology saves miners and emergency response personnel  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Underground radio technology saves miners and emergency response Underground radio technology saves miners and emergency response personnel Underground radio technology saves miners and emergency response personnel Founded through LANL, Vital Alert Technologies, Inc. (Vital Alert) has launched a wireless, two-way real-time voice communication system that is effective through 1,000+ feet of solid rock. April 3, 2012 Vital Alert's C1000 mine and tunnel radios use magnetic induction, advanced digital communications techniques and ultra-low frequency transmission to wirelessly provide reliable 2-way voice, text, or data links through rock strata and other solid media. Vital Alert's C1000 mine and tunnel radios use magnetic induction, advanced digital communications techniques and ultra-low frequency transmission to wirelessly provide reliable 2-way voice, text, or data links through rock

379

Lung cancer epidemiology in New Mexico uranium miners  

SciTech Connect (OSTI)

This investigation assesses the health effects of radon progeny exposure in New Mexico uranium miners. Cumulative exposures sustained by most New Mexico miners are well below those received earlier in the Colorado Plateau. This project utilizes the research opportunity offered by New Mexico miners to address unresolved issues related to radon progeny exposure: (1) the lung cancer risk of lower levels of exposure, (2) interaction between radon progeny exposure and cigarette smoking in the causation of lung cancer, (3) the relationship between lung cancer histologic type and radon progeny exposure, and (4) possible effects of radon progeny exposure other than lung cancer. A cohort study of 3800 men with at least one year of underground uranium mining experience in New Mexico is in progress. Results are discussed.

Samet, J.M.

1991-11-01T23:59:59.000Z

380

Hyperspectral Mineral Mapping In Support Of Geothermal Exploration-  

Open Energy Info (EERE)

Mineral Mapping In Support Of Geothermal Exploration- Mineral Mapping In Support Of Geothermal Exploration- Examples From Long Valley Caldera, Ca And Dixie Valley, Nv, Usa Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Book: Hyperspectral Mineral Mapping In Support Of Geothermal Exploration- Examples From Long Valley Caldera, Ca And Dixie Valley, Nv, Usa Details Activities (2) Areas (2) Regions (0) Abstract: Growing interest and exploration dollars within the geothermal sector have paved the way for increasingly sophisticated suites of geophysical and geochemical tools and methodologies. The efforts to characterize and assess known geothermal fields and find new, previously unknown resources has been aided by the advent of higher spatial resolution airborne geophysics (e.g. aeromagnetics), development of new seismic

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Hole Self-Energy Corrections in the Brueckner Theory  

Science Journals Connector (OSTI)

To study corrections to hole propagators in Brueckner theory, an extension of the Hugenholtz convolution theorem is proved. An integral equation is derived for a class of Brueckner hole corrections and approximate solutions are obtained, one of which gives the usual prescription that makes holes propagate on the energy shell. The derivation shows which class of diagrams are included in this prescription and suggests that a more accurate treatment might be needed.

J. Nuttall

1966-09-23T23:59:59.000Z

382

A toroidal black hole for the AGN phenomenon  

E-Print Network [OSTI]

A new approach to the study of the AGN phenomenon is proposed, in which the nucleus activity is related to the metric of the inner massive black hole. The possibility of a Toroidal Black Hole (TBH), in contrast to the usual Spherical Black Hole (SBH), is discussed as a powerful tool in understanding AGN related phenomena, such as the energetics, the production of jets and the acceleration of particles, the shape of the magnetic field and the lifetime of nucleus activity.

Fulvio Pompilio; S. M. Harun-or-Rashid; Matts Roos

2000-08-30T23:59:59.000Z

383

A Quantum Material Model of Static Schwarzschild Black Holes  

E-Print Network [OSTI]

A quantum-mechanical prescription of static Einstein field equation is proposed in order to construct the matter-metric eigen-states in the interior of a static Schwarzschild black hole where the signature of space-time is chosen as (--++). The spectrum of the quantum states is identified to be the integral multiples of the surface gravity. A statistical explanation of black hole entropy is given and a quantisation rule for the masses of Schwarzschild black holes is proposed.

S. -T. Sung

1997-03-16T23:59:59.000Z

384

On the Stability of Black Holes at the LHC  

E-Print Network [OSTI]

The eventual production of mini black holes by proton-proton collisions at the LHC is predicted by theories with large extra dimensions resolvable at the Tev scale of energies. It is expected that these black holes evaporate shortly after its production as a consequence of the Hawking radiation. We show that for theories based on the ADS/CFT correspondence, the produced black holes may have an unstable horizon, which grows proportionally to the square of the distance to the collision point.

M. D. Maia; E. M. Monte

2008-08-19T23:59:59.000Z

385

Flow Test At Coso Geothermal Area (1978) | Open Energy Information  

Open Energy Info (EERE)

Flow Test At Coso Geothermal Area (1978) Flow Test At Coso Geothermal Area (1978) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Flow Test Activity Date 1978 Usefulness not indicated DOE-funding Unknown Notes Flow tests of well CGEH No. 1 were conducted. LBL performed eight temperature surveys after completion of the well to estimate equilibrium reservoir temperatures. Downhole fluid samples were obtained by the U.S. Geological Survey (USGS) and Lawrence Berkeley Laboratory (LBL), and a static pressure profile was obtained. The first test began September 5, 1978 using nitrogen stimulation to initiate flow; this procedure resulted in small flow and subsequent filling of the bottom hole with drill cuttings. The second test, on November 2, 1978, utilized a nitrogen-foam-water mixture to clean residual particles from bottom hole,

386

Thermal Gradient Holes At Cove Fort Area (Warpinski, Et Al., 2002) | Open  

Open Energy Info (EERE)

Et Al., 2002) Et Al., 2002) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Cove Fort Area (Warpinski, Et Al., 2002) Exploration Activity Details Location Cove Fort Geothermal Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness not indicated DOE-funding Unknown Notes The project at Cove Fort/Sulphurdale in Utah, T26S R6/7W, is concerned with locating and drilling a 900-meter well to explore the western extension of the Cove Fort-Sulphurdale geothermal area. The geophysical exploration consisted of resistivity, ground magnetic, and microgravity surveys that were made to site the well in an optimum location. Drilling of the test well was completed in the fall of 2001 and results are currently being evaluated. The total depth of the well is 598 m with a

387

The effect of injection hole geometry on flat plate film cooling and heat transfer  

E-Print Network [OSTI]

to thermal ly protect a gas turb ine blade f r om the hot gases w i th in a gas turbine engine by inject ion of a coo l ing f lu id th rough discrete holes i n the surface of the blade. Tests were conducted on a flat p late us ing the f i lm cool ing... surface w i th coo l ing a ir c i rculated w i th in the hol low core of the turb ine b lade. External cool ing employs co ld a ir inject ion th rough holes on the outer surface of the turb ine blade produc ing a f i lm of a i r that protects...

Madsen, Eric Perry

2012-06-07T23:59:59.000Z

388

Temperature, heat flow maps and temperature gradient holes |...  

Open Energy Info (EERE)

Temperature, heat flow maps and temperature gradient holes Author T. G. Zacharakis Organization Colorado Geological Survey in Cooperation with the U.S. Department of Energy...

389

Thermal Gradient Holes At Long Valley Caldera Geothermal Area...  

Open Energy Info (EERE)

Date 1978 - 1985 Usefulness useful DOE-funding Unknown Exploration Basis Thermal gradient drilling also continued during this period, consisting of several holes including: The...

390

Hydrodynamic model for electron-hole plasma in graphene  

E-Print Network [OSTI]

We propose a hydrodynamic model describing steady-state and dynamic electron and hole transport properties of graphene structures which accounts for the features of the electron and hole spectra. It is intended for electron-hole plasma in graphene characterized by high rate of intercarrier scattering compared to external scattering (on phonons and impurities), i.e., for intrinsic or optically pumped (bipolar plasma), and gated graphene (virtually monopolar plasma). We demonstrate that the effect of strong interaction of electrons and holes on their transport can be treated as a viscous friction between the electron and hole components. We apply the developed model for the calculations of the graphene dc conductivity, in particular, the effect of mutual drag of electrons and holes is described. The spectra and damping of collective excitations in graphene in the bipolar and monopolar limits are found. It is shown that at high gate voltages and, hence, at high electron and low hole densities (or vice-versa), the excitations are associated with the self-consistent electric field and the hydrodynamic pressure (plasma waves). In intrinsic and optically pumped graphene, the waves constitute quasineutral perturbations of the electron and hole densities (electron-hole sound waves) with the velocity being dependent only on the fundamental graphene constants.

D. Svintsov; V. Vyurkov; S. Yurchenko; T. Otsuji; V. Ryzhii

2012-01-03T23:59:59.000Z

391

Core Holes At Blue Mountain Geothermal Area (Fairbank & Niggemann...  

Open Energy Info (EERE)

Exploration Activity Details Location Blue Mountain Geothermal Area Exploration Technique Core Holes Activity Date 2002 - 2004 Usefulness useful DOE-funding Unknown Exploration...

392

Black Holes as Conformal Field Theories on Horizons  

E-Print Network [OSTI]

We show that any nonextreme black hole can be described by a state with $L_0=E_R$ in a $D=2$ chiral conformal field theory with central charge $c=12E_R$ where $E_R$ is the dimensionless Rindler energy of the black hole. The theory lives in the very near horizon region, i.e. around the origin of Rindler space. Black hole hair is the momentum along the Euclidean dimensionless Rindler time direction. As evidence, we show that $D$--dimensional Schwarzschild black holes and $D=2$ dilatonic ones that are obtained from them by spherical reduction are described by the same conformal field theory states.

Halyo, Edi

2015-01-01T23:59:59.000Z

393

Thermal Gradient Holes At Chena Geothermal Area (EERE, 2010)...  

Open Energy Info (EERE)

EERE, 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Chena Geothermal Area (EERE, 2010) Exploration Activity...

394

Comparison of Black Hole Generators for the LHC  

E-Print Network [OSTI]

We compare Monte Carlo event generators dedicated to simulating the production and decay of extra-dimensional black holes at the Large Hadron Collider.

Douglas M. Gingrich

2006-10-17T23:59:59.000Z

395

Primordial Black Hole Evolution in Tensor-Scalar Cosmology  

Science Journals Connector (OSTI)

A perturbative analysis shows that black holes do not remember the value of the scalar field ? at the time they formed if ? changes in tensor-scalar cosmology. Moreover, even when the black hole mass in the Einstein frame is approximately unaffected by the changing of ?, in the Jordan-Fierz frame the mass increases. This mass increase requires a reanalysis of the evaporation of primordial black holes in tensor-scalar cosmology. It also implies that there could have been a significant magnification of the (Jordan-Fierz frame) mass of primordial black holes.

Ted Jacobson

1999-10-04T23:59:59.000Z

396

Hole doping in high temperature superconductors using the XANES technique  

E-Print Network [OSTI]

Hole doping in high temperature superconductors using the1994 Thallium-Based High Temperature Superconductors ed A M1994 Thallium-Based High Temperature Superconductors ed A M

Hamdan, Nasser

2012-01-01T23:59:59.000Z

397

Core Holes At Long Valley Caldera Geothermal Area (Eichelberger...  

Open Energy Info (EERE)

Eichelberger, Et Al., 1988) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Core Holes At Long Valley Caldera Geothermal Area (Eichelberger, Et...

398

Core Holes At Steamboat Springs Area (Warpinski, Et Al., 2004...  

Open Energy Info (EERE)

Steamboat Springs Area (Warpinski, Et Al., 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Core Holes At Steamboat Springs Area (Warpinski,...

399

Thermal Gradient Holes At Cove Fort Area - Vapor (Warpinski,...  

Open Energy Info (EERE)

Warpinski, Et Al., 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Cove Fort Area - Vapor (Warpinski, Et Al.,...

400

Core Holes At Long Valley Caldera Geothermal Area (Urban, Et...  

Open Energy Info (EERE)

Urban, Et Al., 1987) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Core Holes At Long Valley Caldera Geothermal Area (Urban, Et Al., 1987)...

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Thermal Gradient Holes At Chena Geothermal Area (Erkan, Et Al...  

Open Energy Info (EERE)

Erkan, Et Al., 2007) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Chena Geothermal Area (Erkan, Et Al., 2007)...

402

Slim Holes At Blue Mountain Area (Warpinski, Et Al., 2002) |...  

Open Energy Info (EERE)

Blue Mountain Area (Warpinski, Et Al., 2002) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Slim Holes At Blue Mountain Area (Warpinski, Et Al.,...

403

Thermal Gradient Holes At Obsidian Cliff Area (Hulen, Et Al....  

Open Energy Info (EERE)

Obsidian Cliff Area (Hulen, Et Al., 2003) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Obsidian Cliff Area (Hulen,...

404

Using the Uncharged Kerr Black Hole as a Gravitational Mirror  

Science Journals Connector (OSTI)

We extend the study of the possible use of the Schwarzschild black hole as a gravitational mirror to the more general case of an...

Claes R. Cramer

1997-04-01T23:59:59.000Z

405

The first law of thermodynamics in Lifshitz black holes revisited  

E-Print Network [OSTI]

We obtain the mass expression of the three- and five-dimensional Lifshitz black holes by em- ploying the recently proposed quasilocal formulation of conserved charges, which is based on the off-shell extension of the ADT formalism. Our result is consistent with the first law of black hole thermodynamics and resolves the reported discrepancy between the ADT formalism and the other conventional methods. The same mass expression of Lifshitz black holes is obtained by using an- other quasilocal method by Padmanabhan. We also discuss the reported discrepancy in the context of the extended first law of black hole thermodynamics by allowing the pressure term.

Yongwan Gim; Wontae Kim; Sang-Heon Yi

2014-03-19T23:59:59.000Z

406

Absorption of scalars by extremal black holes in string theory  

E-Print Network [OSTI]

We show that the low frequency absorption cross section of minimally coupled massless scalar fields by extremal spherically symmetric black holes in d dimensions in the presence of string-theoretical alpha' corrections is equal to the horizon area. Classically one has the relation sigma=4GS between the absorption cross section and the black hole entropy. We discuss the validity of such relation in the presence of alpha' corrections for extremal black holes, both nonsupersymmetric and supersymmetric. The examples we consider seem to indicate that this relation is verified in the presence of alpha' corrections for supersymmetric black holes, but not for nonsupersymmetric ones.

Filipe Moura

2014-06-13T23:59:59.000Z

407

Core Holes At Valles Caldera - Redondo Geothermal Area (Goff...  

Open Energy Info (EERE)

understand the stratigraphy, structure, hydrothermal alteration, and subsurface architecture of the Valles caldera. Several authors have reported results from these core holes,...

408

Core Holes At Valles Caldera - Sulphur Springs Geothermal Area...  

Open Energy Info (EERE)

understand the stratigraphy, structure, hydrothermal alteration, and subsurface architecture of the Valles caldera. Several authors have reported results from these core holes,...

409

Thermal Gradient Holes At Glass Mountain Area (Cumming And Mackie...  

Open Energy Info (EERE)

Area (Cumming And Mackie, 2007) Exploration Activity Details Location Glass Mountain Geothermal Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness not...

410

Location Of Hole And Electron Traps On Nanocrystalline Anatase...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

to two overlapping distributions: hole trap emission associated with oxygen vacancies on (101) exposed surfaces, which peaks in the green, and a broader emission...

411

Thermal Gradient Holes At Breitenbush Hot Springs Area (Ingebritsen...  

Open Energy Info (EERE)

(1993) Heat Flow From Four New Research Drill Holes In The Western Cascades, Oregon, Usa Additional References Retrieved from "http:en.openei.orgwindex.php?titleThermalGr...

412

Extremal charged rotating dilaton black holes in odd dimensions  

SciTech Connect (OSTI)

Employing higher-order perturbation theory, we find a new class of charged rotating black hole solutions of Einstein-Maxwell-dilaton theory with general dilaton coupling constant. Starting from the Myers-Perry solutions, we use the electric charge as the perturbative parameter, and focus on extremal black holes with equal-magnitude angular momenta in odd dimensions. We perform the perturbations up to 4th order for black holes in 5 dimensions and up to 3rd order in higher odd dimensions. We calculate the physical properties of these black holes and study their dependence on the charge and the dilaton coupling constant.

Allahverdizadeh, Masoud; Kunz, Jutta; Navarro-Lerida, Francisco [Institut fuer Physik, Universitaet Oldenburg, Postfach 2503 D-26111 Oldenburg (Germany); Departamento de Fisica Atomica, Molecular y Nuclear, Ciencias Fisicas Universidad Complutense de Madrid, E-28040 Madrid (Spain)

2010-09-15T23:59:59.000Z

413

Extremal Charged Rotating Dilaton Black Holes in Odd Dimensions  

E-Print Network [OSTI]

Employing higher order perturbation theory, we find a new class of charged rotating black hole solutions of Einstein-Maxwell-dilaton theory with general dilaton coupling constant. Starting from the Myers-Perry solutions, we use the electric charge as the perturbative parameter, and focus on extremal black holes with equal-magnitude angular momenta in odd dimensions. We perform the perturbations up to 4th order for black holes in 5 dimensions and up to 3rd order in higher odd dimensions. We calculate the physical properties of these black holes and study their dependence on the charge and the dilaton coupling constant.

Masoud Allahverdizadeh; Jutta Kunz; Francisco Navarro-Lerida

2010-07-24T23:59:59.000Z

414

Neutron scattering, a powerful tool to study clay minerals  

Science Journals Connector (OSTI)

Abstract Of the techniques used to study clay minerals, neutron scattering has become more familiar to clay scientists over the past decade. A brief account of neutron scattering theory is given in this review, followed by a description of measurements that can be made using neutron diffraction and neutron scattering spectroscopy, and especially quasi-elastic neutron scattering. Then recent examples of the application of neutron scattering methods to the study of clay minerals are presented, and finally the potential advantages of such experimental results when combined to molecular dynamics are discussed. To conclude, the potential perspectives that the European Spallation Source brings to this subject are pointed out.

Murillo L. Martins; Will P. Gates; Laurent Michot; Eric Ferrage; Virginie Marry; Heloisa N. Bordallo

2014-01-01T23:59:59.000Z

415

Mobile Testing  

Science Journals Connector (OSTI)

Mobile apps are everywhere. Some apps entertain and others enable business transactions. Apps increasingly interact with complex IT landscapes. For example, a banking app on a mobile device acts as a front end that invokes services on a back-end server ... Keywords: mobile apps, mobile devices, software quality management, software testing, test automation, test strategy

Klaus Haller

2013-11-01T23:59:59.000Z

416

ACCRETION-JET CONNECTION IN BLACK HOLES THE ORIGIN OF STELLAR BLACK HOLES &  

E-Print Network [OSTI]

a very large kinetic energy...Moon @ >.9c" #12;POWERFUL DARK JETS FROM BLACK HOLES Radio (Dubner et al erg/sec · NON RADIATIVE JETS = "DARK" JETS · >50% OF THE ENERGY IS NOT RADIATED 1o = 60 pc1arcsec VLA Since their discovery there have been seven International workshops Compact binaries with jets #12

Maryland at College Park, University of

417

Geodesic Study of Regular Hayward Black Hole  

E-Print Network [OSTI]

This paper is devoted to study the geodesic structure of regular Hayward black hole. The timelike and null geodesic have been studied explicitly for radial and non-radial motion. For timelike and null geodesic in radial motion there exists analytical solution, while for non-radial motion the effective potential has been plotted, which investigates the position and turning points of the particle. It has been found that massive particle moving along timelike geodesics path are dragged towards the BH and continues move around BH in particular orbits.

G. Abbas; U. Sabiullah

2014-06-03T23:59:59.000Z

418

CHARYBDIS: A Black hole event generator.  

E-Print Network [OSTI]

model of black hole production and decay which can be interfaced to existing Monte Carlo programs using the Les Houches accord [4]. The major new theoretical input to the generator is the inclusion of the recently calculated ‘grey-body’ factors for black... ? TH geometric arguments show that ?l,m? ? (?rh)2 in any number of dimensions, which means that at high energies the shape of the spectrum is like that of a black body. However the low energy behaviour of the grey-body factors is spin-dependent and also...

Harris, Chris M; Richardson, P; Webber, Bryan R

419

Conformal Invariance of Black Hole Temperature  

E-Print Network [OSTI]

It is shown that the surface gravity and temperature of a stationary black hole are invariant under conformal transformations of the metric that are the identity at infinity. More precisely, we find a conformal invariant definition of the surface gravity of a conformal Killing horizon that agrees with the usual definition(s) for a true Killing horizon and is proportional to the temperature as defined by Hawking radiation. This result is reconciled with the intimate relation between the trace anomaly and the Hawking effect, despite the {\\it non}invariance of the trace anomaly under conformal transformations.

Ted Jacobson; Gungwon Kang

1993-07-06T23:59:59.000Z

420

Down-hole periodic seismic generator  

DOE Patents [OSTI]

A down hole periodic seismic generator system is disclosed for transmitting variable frequency, predominantly shear-wave vibration into earth strata surrounding a borehole. The system comprises a unitary housing operably connected to a well head by support and electrical cabling and contains clamping apparatus for selectively clamping the housing to the walls of the borehole. The system further comprises a variable speed pneumatic oscillator and a self-contained pneumatic reservoir for producing a frequency-swept seismic output over a discrete frequency range.

Hardee, H.C.; Hills, R.G.; Striker, R.P.

1982-10-28T23:59:59.000Z

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Black Hole Constraints on Varying Fundamental Constants  

SciTech Connect (OSTI)

We apply the generalized second law of thermodynamics and derive upper limits on the variation in the fundamental constants. The maximum variation in the electronic charge permitted for black holes accreting and emitting in the present cosmic microwave background corresponds to a variation in the fine-structure constant of {delta}{alpha}/{alpha}{approx_equal}2x10{sup -23} per second. This value matches the variation measured by Webb et al. [Phys. Rev. Lett. 82, 884 (1999); Phys. Rev. Lett. 87, 091301 (2001)] using absorption lines in the spectra of distant quasars and suggests the variation mechanism may be a coupling between the electron and the cosmic photon background.

MacGibbon, Jane H. [Department of Physics and Chemistry, University of North Florida, Jacksonville, Florida 32224 (United States)

2007-08-10T23:59:59.000Z

422

The Fourth Law of Black Hole Thermodynamics  

E-Print Network [OSTI]

We show that black holes fulfill the scaling laws arising in critical transitions. In particular, we find that in the transition from negative to positive values the heat capacities $C_{JQ}$, $C_{\\Omega Q}$ and $C_{J\\Phi}$ give rise to critical exponents satisfying the scaling laws. The three transitions have the same critical exponents as predicted by the universality Hypothesis. We also briefly discuss the implications of this result with regards to the connections among gravitation, quantum mechanics and statistical physics.

C. O. Lousto

1993-06-10T23:59:59.000Z

423

Black Hole Remnants at the LHC  

E-Print Network [OSTI]

We investigate possible signatures of black hole events at the LHC in the hypothesis that such objects will not evaporate completely, but leave a stable remnant. For the purpose of defining a reference scenario, we have employed the publicly available Monte Carlo generator CHARYBDIS2, in which the remnant's behavior is mostly determined by kinematic constraints and conservation of some quantum numbers, such as the baryon charge. Our findings show that electrically neutral remnants are highly favored and a significantly larger amount of missing transverse momentum is to be expected with respect to the case of complete decay.

L. Bellagamba; R. Casadio; R. Di Sipio; V. Viventi

2012-01-16T23:59:59.000Z

424

Survey of hazardous materials used in nuclear testing  

SciTech Connect (OSTI)

The use of hazardous'' materials in routine underground nuclear tests at the Nevada Test Site has been reviewed. In addition the inventory of test yields, originally reported in 1976 has been updated. A trail down-hole inventory'' has been conducted for a selected test. The inorganic hazardous materials introduced during testing (with the exception of lead and the fissionable materials) produce an incremental change in the quantity of such materials already present in the geologic media surrounding the test points. 1 ref., 3 tabs.

Bryant, E.A.; Fabryka-Martin, J.

1991-02-01T23:59:59.000Z

425

The Role of Natural Organic Matter and Mineral Colloids in the Transport of Contaminants through Heterogeneous Vadose-Zone Environments  

SciTech Connect (OSTI)

Our research was guided by a key objective of the Environmental Management Science Program (EMSP), which is to improve conceptual and predictive models for contaminant movement in complex vadose zone environments. In this report, increases in the understanding of colloidcontaminant interactions, colloid mobilization, and colloid deposition within unsaturated soils are cited as requisite needs for predicting contaminant fate and distribution in the vadose zone. We addressed these needs by pursuing three key goals: 1. Identify the mechanisms that govern OM and mineral-colloid reaction and transport in heterogeneous, unsaturated porous media; 2. Quantify the role of OM and mineral colloids in scavenging and facilitating the transport of contaminants of concern to DOE; and 3. Develop and test a mathematical model suitable for simulating the movement of OM- and colloid-associated contaminants through heterogeneous, unsaturated porous media.

James Saiers, Yale University (PI); Joseph Ryan, University of Colorado (Co-PI)

2009-01-31T23:59:59.000Z

426

Division of Energy and Mineral Development | Open Energy Information  

Open Energy Info (EERE)

Division of Energy and Mineral Development Division of Energy and Mineral Development Jump to: navigation, search Logo: IEED Division of Energy and Mineral Development Name IEED Division of Energy and Mineral Development Address 13922 Denver West Parkway, Ste. 200 Place Lakewood, CO Zip 80401-3142 Phone number (303) 969-5270 Website http://www.bia.gov/WhoWeAre/AS Coordinates 39.745142°, -105.154088° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":39.745142,"lon":-105.154088,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

427

Oregon State Department of Geology and Mineral Industries | Open Energy  

Open Energy Info (EERE)

State Department of Geology and Mineral Industries State Department of Geology and Mineral Industries Jump to: navigation, search Logo: Oregon State Department of Geology and Mineral Industries Name Oregon State Department of Geology and Mineral Industries Address Ste. 965 Northeast Oregon Street Place Portland, OR Zip 97232 Website http://www.oregongeology.org/s Coordinates 45.5286301°, -122.656652° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":45.5286301,"lon":-122.656652,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

428

Electrical Properties of Mineral Surfaces for Increasing Water Sorption  

E-Print Network [OSTI]

in the presence of O2.2,4,5 In addition to controlling Mn concentrations, the nanostructures sequester heavy-metal and the associated toxic metals can be remobilized. N the electrical properties of mineral surfaces and thereby affect reactions with charged species such as metal

429

Spectroscopy of selected copper group minerals: ktenasite, orthoserpierite and kipushite  

Science Journals Connector (OSTI)

Orthoserpierite, Ca(Cu,Zn)4(SO4)2(OH)6·3H2O, a calcium copper sulphate hydroxide hydrate mineral, occurs as bright blue-green prismatic crystals commonly associated with aurichalcite and friedelite [11]. A review...

Ray L. Frost; B. Jagannadha Reddy; Eloise C. Keeffe

2010-09-01T23:59:59.000Z

430

Evolutionary selection of enzymatically synthesized semiconductors from biomimetic mineralization vesicles  

SciTech Connect (OSTI)

The way nature evolves and sculpts materials using proteins inspires new approaches to materials engineering but is still not completely understood. Here, we present a cell-free synthetic biological platform to advance studies of biologically synthesized solid-state materials. This platform is capable of simultaneously exerting many of the hierarchical levels of control found in natural biomineralization, including genetic, chemical, spatial, structural, and morphological control, while supporting the evolutionary selection of new mineralizing proteins and the corresponding genetically encoded materials that they produce. DNA-directed protein expression and enzymatic mineralization occur on polystyrene microbeads in water-in-oil emulsions, yielding synthetic surrogates of biomineralizing cells that are then screened by flow sorting, with light-scattering signals used to sort the resulting mineralized composites differentially. We demonstrate the utility of this platform by evolutionarily selecting newly identified silicateins, biomineralizing enzymes previously identified from the silica skeleton of a marine sponge, for enzyme variants capable of synthesizing silicon dioxide (silica) or titanium dioxide (titania) composites. Mineral composites of intermediate strength are preferentially selected to remain intact for identification during cell sorting, and then to collapse postsorting to expose the encoding genes for enzymatic DNA amplification. Some of the newly selected silicatein variants catalyze the formation of crystalline silicates, whereas the parent silicateins lack this ability. The demonstrated bioengineered route to previously undescribed materials introduces in vitro enzyme selection as a viable strategy for mimicking genetic evolution of materials as it occurs in nature.

Bawazer, Lukmaan A.; Izumi, Michi; Kolodin, Dmitriy; Neilson, James R.; Schwenzer, Birgit; Morse, Daniel E. (UCSB)

2012-10-29T23:59:59.000Z

431

Cost Assessment of CO2 Sequestration by Mineral Carbonation  

E-Print Network [OSTI]

Cost Assessment of CO2 Sequestration by Mineral Carbonation Frank E. Yeboah Tuncel M. Yegulalp Harmohindar Singh Research Associate Professor Professor Center for Energy Research... them carbon dioxide (CO 2 ). This paper assesses the cost of sequestering CO 2 produced by a ZEC power plant using solid sequestration process. INTRODUCTION CO 2 is produced when electrical energy is generated using conventional fossil...

Yeboah, F. E.; Yegulalp, T. M.; Singh, H.

2006-01-01T23:59:59.000Z

432

A literature review of actinide-carbonate mineral interactions  

SciTech Connect (OSTI)

Chemical retardation of actinides in groundwater systems is a potentially important mechanism for assessing the performance of the Waste Isolation Pilot Plant (WIPP), a facility intended to demonstrate safe disposal of transuranic waste. Rigorous estimation of chemical retardation during transport through the Culebra Dolomite, a water-bearing unit overlying the WIPP, requires a mechanistic understanding of chemical reactions between dissolved elements and mineral surfaces. This report represents a first step toward this goal by examining the literature for pertinent experimental studies of actinide-carbonate interactions. A summary of existing models is given, along with the types of experiments on which these models are based. Articles pertaining to research into actinide interactions with carbonate minerals are summarized. Select articles involving trace element-carbonate mineral interactions are also reviewed and may serve as templates for future research. A bibliography of related articles is included. Americium(III), and its nonradioactive analog neodymium(III), partition strongly from aqueous solutions into carbonate minerals. Recent thermodynamic, kinetic, and surface studies show that Nd is preferentially removed from solution, forming a Nd-Ca carbonate solid solution. Neptunium(V) is rapidly removed from solution by carbonates. Plutonium incorporation into carbonates is complicated by multiple oxidation states. Little research has been done on the radium(H) and thorium(IV) carbonate systems. Removal of uranyl ion from solution by calcite is limited to monolayer surface coverage.

Stout, D.L. [Missouri Univ., Columbia, MO (United States). Dept. of Geological Sciences; Carroll, S.A. [Lawrence Livermore National Lab., CA (United States)

1993-10-01T23:59:59.000Z

433

Mineral formation during simulated leaks of Hanford waste tanks  

E-Print Network [OSTI]

Mineral formation during simulated leaks of Hanford waste tanks Youjun Deng a , James B. Harsh a handling by M. Gascoyne Abstract Highly-alkaline waste solutions have leaked from underground tanks mimicking tank leak conditions at the US DOE Hanford Site. In batch experiments, Si-rich solutions

Flury, Markus

434

KING FAHD UNIVERSITY OF PETROLEUM & MINERALS Dhahran, Saudi Arabia  

E-Print Network [OSTI]

. INTRODUCTION 1 1.1 The nature of petroleum 1 1.2 The petroleum reservoir 1 1.3 Significance of rock properties.4 Resisitivity log 25 Chapter 6. ROCK PERMEABILITY 28 6.1 Definition 28 6.2 Differential form of Darcy's law 29 6KING FAHD UNIVERSITY OF PETROLEUM & MINERALS Dhahran, Saudi Arabia Basic Properties of Reservoir

Abu-Khamsin, Sidqi

435

The Journal of The Minerals, Metals & Materials Society (TMS)  

E-Print Network [OSTI]

1 23 JOM The Journal of The Minerals, Metals & Materials Society (TMS) ISSN 1047-4838 JOM DOI 10 of Materials Science and Engineering and the Materials Research Institute, The Pennsylvania State University cycles require greater resistance of the cladding to failure, espe- cially in view of the industry

Motta, Arthur T.

436

Uranium minerals from the San Marcos District, Chihuahua, Mexico  

Science Journals Connector (OSTI)

The mineralogy of the two uranium deposits (Victorino and San Marcos I) of Sierra San Marcos, located 30 km northwest of Chihuahua City, Mexico, was studied by optical...2)2Si2O7·6(H2O) (the dominant mineral at b...

Manuel Reyes-Cortés; Luis Fuentes-Cobas; Enrique Torres-Moye…

2010-05-01T23:59:59.000Z

437

Mineralization of Pentachlorophenol With Enhanced Degradation and Power Generation From  

E-Print Network [OSTI]

­2221. � 2012 Wiley Periodicals, Inc. KEYWORDS: microbial fuel cell; PCP degradation rate; power production Cathode Microbial Fuel Cells Liping Huang,1 Linlin Gan,1 Ning Wang,1 Xie Quan,1 Bruce E. Logan,2 GuohuaARTICLE Mineralization of Pentachlorophenol With Enhanced Degradation and Power Generation From Air

438

2010 Minerals Yearbook U.S. Department of the Interior  

E-Print Network [OSTI]

clay and kaolin); Nestle S.A. (fuller's earth); Oil-Dri Corp. of America (fuller's earth); Texas rather than ball clay. Consumption.--Consumption of ball clay increased in 2010. The principal domestic2010 Minerals Yearbook U.S. Department of the Interior U.S. Geological Survey CLAY AND SHALE

439

Natural radionuclide concentrations in processed materials from thai mineral industries  

Science Journals Connector (OSTI)

......Phosphogypsum, a waste produced from...NORM-contaminated waste and equipment...any radiation control guidelines...waterworks treatment facility...by-products and waste produced from...Positioning System. Figure-1...coupled to an integrated signal processor...mineral-processing plants and nearby......

S. Chanyotha; C. Kranrod; N. Chankow; R. Kritsananuwat; P. Sriploy; K. Pangza

2012-11-01T23:59:59.000Z

440

2007 Minerals Yearbook U.S. Department of the Interior  

E-Print Network [OSTI]

parts per million (ppm), to thulium and lutetium, the least abundant rare-earth elements (REE) at about2007 Minerals Yearbook U.S. Department of the Interior U.S. Geological Survey RARE EARTHS May 2010 #12;RARE EARTHS--2007 60.1 RARE EARTHS By James B. Hedrick Domestic survey data and tables were

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

2010 Minerals Yearbook U.S. Department of the Interior  

E-Print Network [OSTI]

million (ppm), to thulium and lutetium, the least abundant rare-earth elements (REE), at about 0.5 ppm, and thallium. Rare earths can be classified as either light rare-earth elements (LREE) or heavy rare-earth2010 Minerals Yearbook U.S. Department of the Interior U.S. Geological Survey RARE EARTHS [ADVANCE

442

2009 Minerals Yearbook U.S. Department of the Interior  

E-Print Network [OSTI]

parts per million (ppm), to thulium and lutetium, the least abundant rare-earth elements (REE), at about be classified as either light rare-earth elements (LREE) or heavy rare-earth elements (HREE). This division2009 Minerals Yearbook U.S. Department of the Interior U.S. Geological Survey RARE EARTHS [ADVANCE

443

2011 Minerals Yearbook U.S. Department of the Interior  

E-Print Network [OSTI]

not necessarily reflect trends in consumption. the rare earths are a moderately abundant group of 17 elements light rare-earth elements (LRee) or heavy rare-earth elements (hRee). the LRee include the lanthanide2011 Minerals Yearbook U.S. Department of the Interior U.S. Geological Survey RARE EARTHS [ADVANCE

444

Microbially Mediated Mineral Carbonation: Roles of Phototrophy and Heterotrophy  

Science Journals Connector (OSTI)

Ian M. Power *†, Siobhan A. Wilson ‡?, Darcy P. Small §, Gregory M. Dipple ?, Wankei Wan §, and Gordon Southam † ... Mineral Deposit Research Unit, Department of Earth and Ocean Sciences, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada ...

Ian M. Power; Siobhan A. Wilson; Darcy P. Small; Gregory M. Dipple; Wankei Wan; Gordon Southam

2011-08-31T23:59:59.000Z

445

Abbreviations for names of rock-forming minerals  

Science Journals Connector (OSTI)

...varies from 1-5 letters and uses lowercase throughout. The Kretz...capitalization), but in many cases use different symbols for the same...that some petrologists have uses for these mineral names. In...awaruite G Ax axinite GROUP Bab babingtonite G Bdy baddeleyite G Brt barite...

Donna L. Whitney; Bernard W. Evans

446

Natural radionuclide concentrations in processed materials from thai mineral industries  

Science Journals Connector (OSTI)

......radioactivity in their everyday life. Human management of NORM for economic purposes, such as mineral ore mining and processing, and fossil...the NORM project. REFERENCES 1 Tadmor J. Radioactivity from coal-fired power plants: a review. J. Environ. Radioact......

S. Chanyotha; C. Kranrod; N. Chankow; R. Kritsananuwat; P. Sriploy; K. Pangza

2012-11-01T23:59:59.000Z

447

MIN E 408: Mining Enterprise Economics Mineral Resource/Reserve  

E-Print Network [OSTI]

quality assurance and quality control (QA/QC) programs. Geological / Grade continuity · geometrical of any mining project. The quality of resource classification is a key parameter for accurate economic to attract investors. Mineral resource classification standards were created in order to define rules

Boisvert, Jeff

448

Primordial black holes as biased tracers  

E-Print Network [OSTI]

Primordial black holes (PBHs) are theoretical black holes which may be formed during the radiation dominant era and, basically, caused by the gravitational collapse of radiational overdensities. It has been well known that in the context of the structure formation in our Universe such collapsed objects, e.g., halos/galaxies, could be considered as bias tracers of underlying matter fluctuations and the halo/galaxy bias has been studied well. Employing a peak-background split picture which is known to be a useful tool to discuss the halo bias, we consider the large scale clustering behavior of the PBH and propose an almost mass-independent constraint to the scenario that dark matters (DMs) consist of PBHs. We consider the case where the statistics of the primordial curvature perturbations is almost Gaussian, but with small local-type non-Gaussianity. If PBHs account for the DM abundance, such a large scale clustering of PBHs behaves as nothing but the matter isocurvature perturbation and constrained strictly by...

Tada, Yuichiro

2015-01-01T23:59:59.000Z

449

Probing the puncture for black hole simulations  

SciTech Connect (OSTI)

With the puncture method for black hole simulations, the second infinity of a wormhole geometry is compactified to a single 'puncture point' on the computational grid. The region surrounding the puncture quickly evolves to a trumpet geometry. The computational grid covers only a portion of the trumpet throat. It ends at a boundary whose location depends on resolution. This raises the possibility that perturbations in the trumpet geometry could propagate down the trumpet throat, reflect from the puncture boundary, and return to the black hole exterior with a resolution-dependent time delay. Such pathological behavior is not observed. This is explained by the observation that some perturbative modes propagate in the conformal geometry, others propagate in the physical geometry. The puncture boundary exists only in the physical geometry. The modes that propagate in the physical geometry are always directed away from the computational domain at the puncture boundary. The finite difference stencils ensure that these modes are advected through the boundary with no coupling to the modes that propagate in the conformal geometry. These results are supported by numerical experiments with a code that evolves spherically symmetric gravitational fields with standard Cartesian finite difference stencils. The code uses the Baumgarte-Shapiro-Shibata-Nakamura formulation of Einstein's equations with 1+log slicing and gamma-driver shift conditions.

Brown, J. David [Department of Physics, North Carolina State University, Raleigh, North Carolina 27695 (United States)

2009-10-15T23:59:59.000Z

450

Electrical Generating Capacities of Geothermal Slim Holes  

SciTech Connect (OSTI)

Theoretical calculations are presented to estimate the electrical generating capacity of the hot fluids discharged from individual geothermal wells using small wellhead generating equipment over a wide range of reservoir and operating conditions. The purpose is to appraise the possibility of employing slim holes (instead of conventional production-size wells) to power such generators for remote off-grid applications such as rural electrification in developing countries. Frequently, the generating capacity desired is less than one megawatt, and can be as low as 100 kilowatts; if slim holes can be usefully employed, overall project costs will be significantly reduced. This report presents the final results of the study. Both self-discharging wells and wells equipped with downhole pumps (either of the ''lineshaft'' or the ''submersible'' type) are examined. Several power plant designs are considered, including conventional single-flash backpressure and condensing steam turbines, binary plants, double-flash steam plants, and steam turbine/binary hybrid designs. Well inside diameters from 75 mm to 300 mm are considered; well depths vary from 300 to 1200 meters. Reservoir temperatures from 100 C to 240 C are examined, as are a variety of reservoir pressures and CO2 contents and well productivity index values.

Pritchett, J.W.

1998-10-01T23:59:59.000Z

451

Thermodynamics of (2+1)-dimensional acoustic black hole based on the generalized uncertainty principle  

E-Print Network [OSTI]

We study thermodynamic quantities of an acoustic black hole and its thermodynamic stability in a cavity based on the generalized uncertainty principle. It can be shown that there is a minimal black hole which can be a stable remnant after black hole evaporation. Moreover, the behavior of the free energy shows that the large black hole is stable too. Therefore, the acoustic black hole can decay into the remnant or the large black hole.

Wontae Kim; Edwin J. Son; Myungseok Yoon

2008-01-09T23:59:59.000Z

452

Binary Black Hole Accretion Flows in Merged Galactic Nuclei  

Science Journals Connector (OSTI)

......for Theoretical Physics, Oiwake-cho...when the gas can pass across the maximum...mass-capture rates are eventually...holes|black hole physics|galaxies: nuclei...when the gas can pass across the maximum...mass-capture rates exhibit little...for Theoretical Physics (YITP) of Kyoto......

Kimitake Hayasaki; Shin Mineshige; Hiroshi Sudou

2007-04-25T23:59:59.000Z

453

Quasar evolution and the growth of black holes  

Science Journals Connector (OSTI)

......hole which accretes at a rate that is ultimately limited...intermittently at an average rate that is a universal function...that the mean accretion rate scales as M 1.5 t 6...sufficiently massive galaxies pass through a quasar phase...accretion discs|black hole physics|galaxies: active......

Todd A. Small; Roger D. Blandford

1992-12-15T23:59:59.000Z

454

Accelerating and rotating black holes J. B. Griffiths1  

E-Print Network [OSTI]

Accelerating and rotating black holes J. B. Griffiths1 and J. Podolsk´y2 1Department Abstract An exact solution of Einstein's equations which represents a pair of accelerating and rotating which explicitly contains the known special cases for either rotating or accelerating black holes

455

Evaluating an icon of population persistence: the Devil's Hole pupfish  

Science Journals Connector (OSTI)

...research-article Research articles 1001 60 197 Evaluating an icon of population persistence: the Devil's Hole pupfish J. Michael...Based on our analyses, we conclude that rather than being an icon of unusual persistence in isolation, the Devil's Hole pupfish...

2014-01-01T23:59:59.000Z

456

Synchronous Black Hole Search in Directed Graphs Adrian Kosowski  

E-Print Network [OSTI]

Synchronous Black Hole Search in Directed Graphs Adrian Kosowski Alfredo Navarra Cristina M called black hole nodes, and once a robot enters in one of them, it is destroyed. The goal is to find supported by the Italian CNR Short-Term Mobility Program. A. Kosowski was supported Polish Ministry Grant N

Paris-Sud XI, Université de

457

Modified Black Hole with Polar Jet and Vortex  

E-Print Network [OSTI]

There are many models relating an accretion disk of Black Hole to jet outflow. The herein heuristic model describes the continuation of an external accretion disk to an internal accretion disk for less than Black Hole horizon, and subsequent polar jet outflow along polar axis out of polar vortex wherein the event horizon is no longer descriptive.

T. Tmmalm

2001-12-06T23:59:59.000Z

458

Electromagnetic extraction of energy from Kerr black holes  

E-Print Network [OSTI]

We elucidate the `right' process for energy extraction from Kerr black holes through `FFDE' magnetospheres, free from causality violation. It is shown that the magnetosphere of a Kerr black hole possesses the double-structure, consisting of the inner and outer magnetospheres with the pair-creation gap between them and with respective unipolar batteries at the inner and outer surfaces of the gap.

Isao Okamoto

2005-06-14T23:59:59.000Z

459

Black holes at the IceCube neutrino telescope  

Science Journals Connector (OSTI)

If the fundamental Planck scale is about a TeV and the cosmic neutrino flux is at the Waxman-Bahcall level, quantum black holes are created daily in the Antarctic ice cap. We reexamine the prospects for observing such black holes with the IceCube neutrino-detection experiment. To this end, we first revise the black hole production rate by incorporating the effects of inelasticty, i.e., the energy radiated in gravitational waves by the multipole moments of the incoming shock waves. After that we study in detail the process of Hawking evaporation accounting for the black hole’s large momentum in the lab system. We derive the energy spectrum of the Planckian cloud which is swept forward with a large, O(106), Lorentz factor. (It is noteworthy that the boosted thermal spectrum is also relevant for the study of near-extremal supersymmetric black holes, which could be copiously produced at the Large Hadron Collider.) In the semiclassical regime, we estimate the average energy of the boosted particles to be less than 20% the energy of the ? progenitor. Armed with such a constraint, we determine the discovery reach of IceCube by tagging on soft (relative to what one would expect from charged current standard model processes) muons escaping the electromagnetic shower bubble produced by the black hole’s light descendants. The statistically significant 5? excess extends up to a quantum gravity scale ?1.3??TeV.

Luis A. Anchordoqui; Matthew M. Glenz; Leonard Parker

2007-01-09T23:59:59.000Z

460

Instabilities of (near) extremal rotating black holes in higher dimensions  

E-Print Network [OSTI]

Recently, Durkee and Reall have conjectured a criterion for linear instability of rotating, extremal, asymptotically Minkowskian black holes in $d\\ge 4$ dimensions, such as the Myers-Perry black holes. They considered a certain elliptic operator, $\\cal A$, acting on symmetric traceless tensors intrinsic to the horizon. Based in part on numerical evidence, they suggested that if the lowest eigenvalue, $\\lambda$, of this operator is less than the critical value $-1/4$ ( called "effective BF-bound"), then the black hole is linearly unstable. In this paper, we prove their conjecture. Our proof uses a combination of methods such as (i) the "canonical energy method" of Hollands-Wald, (ii) algebraically special properties of the near horizon geometries associated with the black hole, and (iii) the structure of the (linearized) constraint equations. Our method of proof is also applicable to rotating, extremal asymptotically Anti-deSitter black holes. In that case, our methods show that "all" such black holes are unstable. Although we explicitly discuss in this paper only extremal black holes, we argue that our methods can be generalized straightforwardly to obtain the same results for "near" extremal black holes.

Stefan Hollands; Akihiro Ishibashi

2014-08-04T23:59:59.000Z

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

E-Print Network 3.0 - access hole parameters Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

features in this regime whenever the quantum dot hole level is resonant with two... -dimensional hole states located at the capping layer-blocking barrier interface in our...

462

Slim Holes At Fort Bliss Area (DOE GTP) | Open Energy Information  

Open Energy Info (EERE)

Fort Bliss Area Exploration Technique Slim Holes Activity Date Usefulness not indicated DOE-funding Unknown Notes 2 slim holes References (1 January 2011) GTP ARRA Spreadsheet...

463

Fuel injector Holes (Fabrication of Micro-Orifices for Fuel Injectors...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

injector Holes (Fabrication of Micro-Orifices for Fuel Injectors) Fuel injector Holes (Fabrication of Micro-Orifices for Fuel Injectors) 2009 DOE Hydrogen Program and Vehicle...

464

Thermal Gradient Holes At Coso Geothermal Area (1976) | Open Energy  

Open Energy Info (EERE)

Thermal Gradient Holes At Coso Geothermal Area (1976) Thermal Gradient Holes At Coso Geothermal Area (1976) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Coso Geothermal Area (1976) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Thermal Gradient Holes Activity Date 1976 Usefulness useful DOE-funding Unknown Notes Temperatures have been obtained to depths up to 133 m in 22 boreholes with measurements being made at least four times in each borehole. Geothermal gradients ranged from 240C/km to 450 0C/km. References Combs, J. (1 December 1976) Heat flow determinations and implied thermal regime of the Coso geothermal area, California Retrieved from "http://en.openei.org/w/index.php?title=Thermal_Gradient_Holes_At_Coso_Geothermal_Area_(1976)&oldid=511217"

465

Hypervelocity binary stars: smoking gun of massive binary black holes  

E-Print Network [OSTI]

The hypervelocity stars recently found in the Galactic halo are expelled from the Galactic center through interactions between binary stars and the central massive black hole or between single stars and a hypothetical massive binary black hole. In this paper, we demonstrate that binary stars can be ejected out of the Galactic center with velocities up to 10^3 km/s, while preserving their integrity, through interactions with a massive binary black hole. Binary stars are unlikely to attain such high velocities via scattering by a single massive black hole or through any other mechanisms. Based on the above theoretical prediction, we propose a search for binary systems among the hypervelocity stars. Discovery of hypervelocity binary stars, even one, is a definitive evidence of the existence of a massive binary black hole in the Galactic center.

Youjun Lu; Qingjuan Yu; D. N. C. Lin

2007-07-12T23:59:59.000Z

466

Experimental Signature for Black Hole Production in Neutrino Air Showers  

E-Print Network [OSTI]

The existence of extra degrees of freedom beyond the electroweak scale may allow the formation of black holes in nearly horizontal neutrino air showers. In this paper we examine the average properties of the light descendants of these black holes. Our analysis indicates that black hole decay gives rise to deeply penetrating showers with an electromagnetic component which differs substantially from that in conventional neutrino interactions, allowing a good characterization of the phenomenon against background. Naturally occurring black holes in horizontal neutrino showers could be detected and studied with the Auger air shower array. Since the expected black hole production rate at Auger is $> 1$ event/year, this cosmic ray observatory could be potentially powerful in probing models with extra dimensions and TeV-scale gravity.

Luis Anchordoqui; Haim Goldberg

2001-10-15T23:59:59.000Z

467

Extremal black holes and the first law of thermodynamics  

Science Journals Connector (OSTI)

We study the low-temperature expansion of the first law of thermodynamics for near-extremal black holes. We show that for extremal black holes with nonvanishing entropy, the leading-order contribution yields an expression for their extremal entropy that is in agreement with the entropy-function result. When their entropy vanishes due to the vanishing of a one-cycle on the horizon, such a leading contribution is always compatible with the first law satisfied by a Bañados-Teitelboim-Zanelli black hole. The universality of these results follows from universal facts about extremal black holes. Our results are consistent with both the presence of local AdS2 and AdS3 near-horizon throats for extremal black holes and with the suggested quantum microscopic descriptions (AdS2/CFT1, Kerr/CFT, and extremal vanishing horizon/CFT).

Maria Johnstone; M. M. Sheikh-Jabbari; Joan Simón; Hossein Yavartanoo

2013-11-27T23:59:59.000Z

468

Exploring Frontiers in Kinetics and Mechanisms of Geochemical Processes at the Mineral/Water Interface  

E-Print Network [OSTI]

Exploring Frontiers in Kinetics and Mechanisms of Geochemical Processes at the Mineral in the Earth's Critical Zone is the kinetics. The timescales for geochemical processes range from milliseconds geochemical processes including surface complexation, mineral transformations, and oxidation

Sparks, Donald L.

469

Application of ion-exchange to mass spectrometric determination of boron in mineral waters  

Science Journals Connector (OSTI)

The mass spectrometric stable isotope dilution technique has been applied to the determination of boron in mineral waters. Highly enriched10B in the form of H3BO3...was added to the mineral water sample as a spik...

B. Gorenc; J. Marsel; G. Tramšek

1970-01-01T23:59:59.000Z

470

RIETVELD REFINEMENT OF REAL STRUCTURE PARAMETERS OF DISORDERED CLAY MINERALS IN  

E-Print Network [OSTI]

-conventional hydrocarbons in Germany) Germany's potential for shale oil and shale gas NIKO seal gas-rich shale shale: sedimentary rock which contains quartz, carbonates and clay minerals #12;clay minerals in shales quartz

Magee, Joseph W.

471

Thermoluminescence and Electron Spin Resonance Investigations of Minerals for the Detection of Irradiated Foods  

Science Journals Connector (OSTI)

Thermoluminescence (TL) measurements are used to detect irradiated foods. They are performed by investigating the minerals that contaminate certain products. Pure quartz, feldspars, and mineral mixtures, which are to be expected in foods, were examined ...

Birgit Ziegelmann; Klaus W. Bögl; Georg. A. Schreiber

1998-10-07T23:59:59.000Z

472

Phenanthrene mineralization along a natural salinity gradient in an Urban Estuary, Boston Harbor, Massachusetts  

Science Journals Connector (OSTI)

The effect of varying salinity on phenanthrene and glutamate mineralization was examined in sediments along a natural salinity gradient in an urban tidal river. Mineralization was...14CO2 from sediment slurries d...

Michael P. Shiaris

473

Quantitative assessment of bone mineral content in dental radiography —Methodology and clinical usefulness  

Science Journals Connector (OSTI)

Various techniques have been developed for measuring bone mineral content in medical examination and treatment these days1–6). In the dento-maxilo-facial region, mandibular bone mineral content has been investiga...

Takenori Noikura

1996-12-01T23:59:59.000Z

474

Rend Lake College celebrates the opening of a new coal miner training facility  

SciTech Connect (OSTI)

The Coal Miner Training Center at Rend Lake College recently hosted the Illinois Mining Institute's annual conference and a regional mine rescue competition. The article gives an outline of the coal miner training and refresher course offered. 3 photos.

Buchsbaum, L.

2009-09-15T23:59:59.000Z

475

STRUCTURAL CONTROL AND ANISOTROPY OF MINERALIZATION THE CHUQUICAMATA PORPHYRY COPPER DEPOSIT,  

E-Print Network [OSTI]

STRUCTURAL CONTROL AND ANISOTROPY OF MINERALIZATION WITHIN THE CHUQUICAMATA PORPHYRY COPPER DEPOSIT CONTROL AND ANISOTROPY OF MINERALIZATION WITHIN THE CHUQUICAMATA PORPHYRY COPPER DEPOSIT, NORTHERN CHILE the Chuquicamata Porphyry Copper Deposit, northern Chile DEPARTMENT OR SCHOOL: Department of Earth Sciences DEGREE

Beaumont, Christopher

476

RCW 79.14 Mineral, Coal, Oil and Gas Leases | Open Energy Information  

Open Energy Info (EERE)

RCW 79.14 Mineral, Coal, Oil and Gas Leases Jump to: navigation, search OpenEI Reference LibraryAdd to library Legal Document- StatuteStatute: RCW 79.14 Mineral, Coal, Oil and Gas...

477

THE RELATIONSHIP BETWEEN THE MINERAL COMPOSITION OF SPELEOTHEMS AND MINERALIZATION OF BRECCIA PIPES: EVIDENCE FROM CORKSCREW CAVE, ARIZONA, USA  

Science Journals Connector (OSTI)

...of minerals (i.e., hornesite, talmessite, carnotite, tyuyamunite, claudetite...de mineraux (i.e., hornesite, talmessite, carnotite, tyuyamunite, claudetite...hornesite, Mg3(AsO4)28H2O, and talmessite Ca2Mg(AsO4)22H2O. After subtracting...

Bogdan P. Onac; John W. Hess; William B. White

478

Testing numerical relativity with the shifted gauge wave  

E-Print Network [OSTI]

Computational methods are essential to provide waveforms from coalescing black holes, which are expected to produce strong signals for the gravitational wave observatories being developed. Although partial simulations of the coalescence have been reported, scientifically useful waveforms have so far not been delivered. The goal of the AppleswithApples (AwA) Alliance is to design, coordinate and document standardized code tests for comparing numerical relativity codes. The first round of AwA tests have now being completed and the results are being analyzed. These initial tests are based upon periodic boundary conditions designed to isolate performance of the main evolution code. Here we describe and carry out an additional test with periodic boundary conditions which deals with an essential feature of the black hole excision problem, namely a non-vanishing shift. The test is a shifted version of the existing AwA gauge wave test. We show how a shift introduces an exponentially growing instability which violates the constraints of a standard harmonic formulation of Einstein's equations. We analyze the Cauchy problem in a harmonic gauge and discuss particular options for suppressing instabilities in the gauge wave tests. We implement these techniques in a finite difference evolution algorithm and present test results. Although our application here is limited to a model problem, the techniques should benefit the simulation of black holes using harmonic evolution codes.

Maria C. Babiuc; Bela Szilagyi; Jeffrey Winicour

2005-11-29T23:59:59.000Z

479

MAPPING MINERALS AT A POTENTIAL MARS ANALOG SITE ON THE TIBETAN PLATEAU, David. P. Mayer1  

E-Print Network [OSTI]

library [6]. Certain minerals, such as halite and large (up to 15 cm long) crystals of gypsum, were easily

480

Light intensity and image visualization of GDI injector sprays according to nozzle hole arrangements  

Science Journals Connector (OSTI)

Abstract The light intensity measurement and image visualization of multi-hole injection spray due to different hole arrangements and hole numbers were investigated. The light intensities and behavior characteristics of the GDI spray were analyzed through the axial and diagonal spray penetration, cone angle, and spray area from the spray images by using the image visualization system and image analysis system. The atomization performance of GDI injectors was analyzed by the local and overall Sauter mean diameter (SMD) measurement. It is revealed that the higher injection pressure shows higher light intensity levels due to the strong vortices and collision by a high injection pressure. The light intensity level at the outer and end region of the spray shows lower value compared to that at the center spray region. In all of test injectors, the increased injection pressure leads to the decrease of the droplet size distribution in the initial spray. But, there is little difference of the droplet size at low and high injection pressure in middle and latter period after the injection. The overall SMD of GDI injectors showed from 14 to 23.14 ?m.

Hyung Jun Kim; Su Han Park; Chang Sik Lee

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "mineral test hole" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

The r-Process in Metal Poor Stars and Black Hole Formation  

SciTech Connect (OSTI)

Nucleosynthesis of heavy nuclei in metal-poor stars is generally ascribed to the r-process, as the abundance pattern in many such stars agrees with the inferred Solar r-process abundances. Nonetheless, a significant number of these stars do not share this r-process template. they suggest that many such stars have begun an r-process, but it was prevented from running to completion in more massive stars by collapse to black holes, creating a 'truncated r-process,' or 'tr-process'. The observed fraction of tr-process stars is found to be consistent with expectations from the initial mass function (IMF), and they suggest that an apparent sharp truncation observed at around mass 160 could result from a combination of collapses to black holes and the difficulty of observing the higher mass rare earths. They test the tr-process hypothesis with calculations that are terminated before all r-process trajectories have been ejected. These produce qualitative agreement with observation when both black hole collapse and observational realities are taken into account.

Boyd, R N; Famiano, M A; Meyer, B S; Motizuki, Y; Kajino, T; Roederer, I U

2011-11-30T23:59:59.000Z

482

THE r-PROCESS IN METAL-POOR STARS AND BLACK HOLE FORMATION  

SciTech Connect (OSTI)

Nucleosynthesis of heavy nuclei in metal-poor stars is generally thought to occur via the r-process because the r-process is a primary process that would have operated early in the Galaxy's history. This idea is strongly supported by the fact that the abundance pattern in many metal-poor stars matches well the inferred solar r-process abundance pattern in the mass range between the second and third r-process abundance peaks. Nevertheless, a significant number of metal-poor stars do not share this standard r-process template. In this Letter, we suggest that the nuclides observed in many of these stars are produced by the r-process, but that it is prevented from running to completion in more massive stars by collapse to black holes before the r-process is completed, creating a 'truncated r-process', or 'tr-process'. We find that the observed fraction of tr-process stars is qualitatively what one would expect from the initial mass function and that an apparent sharp truncation observed at around mass 160 could result from a combination of collapses to black holes and the difficulty of observing the higher mass rare-earth elements. We test the tr-process hypothesis with r-process calculations that are terminated before all r-process trajectories have been ejected. We find qualitative agreement between observation and theory when black hole collapse and observational realities are taken into account.

Boyd, R. N. [Physics and Life Sciences, L-050, Lawrence Livermore National Laboratory, Livermore, CA 94550 (United States); Famiano, M. A. [Department of Physics and Joint Institute for Nuclear Astrophysics (JINA), Western Michigan University, 1903 W. Michigan Avenue, Kalamazoo, MI 49008-5252 (United States); Meyer, B. S. [Department of Physics and Astronomy, Clemson University, 118 Kinard Laboratory, Clemson, SC 29634-0978 (United States); Motizuki, Y. [RIKEN Nishina Center, Hirosawa 2-1, Wako 351-0198 (Japan); Kajino, T. [National Astronomical Observatory of Japan, 2-21-1 Mitaka, Tokyo 181-8588 (Japan); Roederer, I. U., E-mail: boyd11@llnl.gov [Carnegie Observatories, 813 Santa Barbara Street, Pasadena, CA 91101 (United States)

2012-01-15T23:59:59.000Z

483

Deriving the First Law of Black Hole Thermodynamics without Entanglement  

E-Print Network [OSTI]

In AdS/CFT, how is the bulk first law realized in the boundary CFT? Recently, Faulkner et al. showed that in certain holographic contexts, the bulk first law has a precise microscopic interpretation as a first law of entanglement entropy in the boundary theory. However, the bulk can also satisfy a first law when the boundary density matrix is pure, i.e. in the absence of entanglement with other degrees of freedom. In this note we argue that the bulk first law should generally be understood in terms of a particular coarse-graining of the boundary theory. We use geons, or single-exterior black holes, as a testing ground for this idea. Our main result is that for a class of small perturbations to these spacetimes the Wald entropy agrees to first order with the one-point entropy, a coarse-grained entropy recently proposed by Kelly and Wall. This result also extends the regime over which the one-point entropy is known to be equal to the causal holographic information of Hubeny and Rangamani.

William R. Kelly

2014-11-03T23:59:59.000Z

484

Deriving the First Law of Black Hole Thermodynamics without Entanglement  

E-Print Network [OSTI]

In AdS/CFT, how is the bulk first law realized in the boundary CFT? Recently, Faulkner et al. showed that in certain holographic contexts, the bulk first law has a precise microscopic interpretation as a first law of entanglement entropy in the boundary theory. However, the bulk can also satisfy a first law when the boundary density matrix is pure, i.e. in the absence of entanglement with other degrees of freedom. In this note we argue that the bulk first law should generally be understood in terms of a particular coarse-graining of the boundary theory. We use geons, or single-exterior black holes, as a testing ground for this idea. Our main result is that for a class of small perturbations to these spacetimes the Wald entropy agrees to first order with the one-point entropy, a coarse-grained entropy recently proposed by Kelly and Wall. This result also extends the regime over which the one-point entropy is known to be equal to the causal holographic information of Hubeny and Rangamani.

Kelly, William R

2014-01-01T23:59:59.000Z

485

COAL SLAGGING AND REACTIVITY TESTING  

SciTech Connect (OSTI)

Union Fenosa's La Robla I Power Station is a 270-MW Foster Wheeler arch-fired system. The unit is located at the mine that provides a portion of the semianthracitic coal. The remaining coals used are from South Africa, Russia, Australia, and China. The challenges at the La Robla I Station stem from the various fuels used, the characteristics of which differ from the design coal. The University of North Dakota Energy & Environmental Research Center (EERC) and the Lehigh University Energy Research Center (LUERC) undertook a program to assess problematic slagging and unburned carbon issues occurring at the plant. Full-scale combustion tests were performed under baseline conditions, with elevated oxygen level and with redistribution of air during a site visit at the plant. During these tests, operating information, observations and temperature measurements, and coal, slag deposit, and fly ash samples were obtained to assess slagging and unburned carbon. The slagging in almost all cases appeared due to elevated temperatures rather than fuel chemistry. The most severe slagging occurred when the temperature at the sampling port was in excess of 1500 C, with problematic slagging where first-observed temperatures exceeded 1350 C. The presence of anorthite crystals in the bulk of the deposits analyzed indicates that the temperatures were in excess of 1350 C, consistent with temperature measurements during the sampling period. Elevated temperatures and ''hot spots'' are probably the result of poor mill performance, and a poor distribution of the coal from the mills to the specific burners causes elevated temperatures in the regions where the slag samples were extracted. A contributing cause appeared to be poor combustion air mixing and heating, resulting in oxygen stratification and increased temperatures in certain areas. Air preheater plugging was observed and reduces the temperature of the air in the windbox, which leads to poor combustion conditions, resulting in unburned carbon as well as slagging. A second phase of the project involved advanced analysis of the baseline coal along with an Australian coal fired at the plant. These analysis results were used in equilibrium thermodynamic modeling along with a coal quality model developed by the EERC to assess slagging, fouling, and opacity for the coals. Bench-scale carbon conversion testing was performed in a drop-tube furnace to assess the reactivity of the coals. The Australian coal had a higher mineral content with significantly more clay minerals present than the baseline coal. The presence of these clay minerals, which tend to melt at relatively low temperatures, indicated a higher potential for problematic slagging than the baseline coal. However, the pyritic minerals, comprising over 25% of the baseline mineral content, may form sticky iron sulfides, leading to severe slagging in the burner region if local areas with reducing conditions exist. Modeling results indicated that neither would present significant fouling problems. The Australian coal was expected to show slagging behavior much more severe than the baseline coal except at very high furnace temperatures. However, the baseline coal was predicted to exhibit opacity problems, as well as have a higher potential for problematic calcium sulfate-based low-temperature fouling. The baseline coal had a somewhat higher reactivity than the Australian coal, which was consistent with both the lower average activation energy for the baseline coal and the greater carbon conversion at a given temperature and residence time. The activation energy of the baseline coal showed some effect of oxygen on the activation energy, with E{sub a} increasing at the lower oxygen concentration, but may be due to the scatter in the baseline coal kinetic values at the higher oxygen level tested.

Donald P. McCollor; Kurt E. Eylands; Jason D. Laumb

2003-10-01T23:59:59.000Z

486

Carbon Mineralization by Aqueous Precipitation for Beneficial Use of CO2 from Flue Gas  

SciTech Connect (OSTI)

The objective of this project is to demonstrate an innovative process to mineralize CO2 from flue gas directly to reactive carbonates and maximize the value and versatility of its beneficial use products. The program scope includes the design, construction, and testing of a CO2 Conversion to Material Products (CCMP) Pilot Demonstration Plant utilizing CO2 from the flue gas of a power production facility in Moss Landing, CA. This topical report covers Subphase 2a which is the design phase of pilot demonstration subsystems. Materials of construction have been selected and proven in both lab scale and prototype testing to be acceptable for the reagent conditions of interest. The target application for the reactive carbonate material has been selected based upon small-scale feasibility studies and the design of a continuous fiber board production line has been completed. The electrochemical cell architecture and components have been selected based upon both lab scale and prototype testing. The appropriate quality control and diagnostic techniques have been developed and tested along with the required instrumentation and controls. Finally the demonstrate site infrastructure, NEPA categorical exclusion, and permitting is all ready for the construction and installation of the new units and upgrades.

Devenney, Martin; Gilliam, Ryan; Seeker, Randy

2013-08-01T23:59:59.000Z

487

Mineral sequestration of CO2 by aqueous carbonation of1 coal combustion fly-ash2  

E-Print Network [OSTI]

1 Mineral sequestration of CO2 by aqueous carbonation of1 coal combustion fly-ash2 3 G. Montes that could possibly4 contribute to reducing carbon dioxide emissions is the in-situ mineral sequestration (long term5 geological storage) or the ex-situ mineral sequestration (controlled industrial reactors

Paris-Sud XI, Université de

488

Lower mantle composition and temperature from mineral physics and thermodynamic modelling  

Science Journals Connector (OSTI)

......Equations of state, Rev. Mineral. Geochem., 41...Mg,Fe)O, Am. Mineral., 84, 272-276...thermal expansion of lime periclase corundum...7(4), 1-7. Green D.H. , Ringwood A.E., 1963. Mineral assemblages in a model......

E. Mattern; J. Matas; Y. Ricard; J. Bass

2005-03-01T23:59:59.000Z

489

What's Wrong With Black Hole Thermodynamics?  

E-Print Network [OSTI]

Not only is the Bekenstein expression for the entropy of a black hole a convex function of the energy, rather than being a concave function as it must be, it predicts a final equilibrium temperature given by the harmonic mean. This violates the third law, and the principle of maximum work. The property that means are monotonically increasing functions of their argument underscores the error of transferring from temperature means to means in the internal energy when the energy is not a monotonically increasing function of temperature. Whereas the former leads to an increase in entropy, the latter lead to a decrease in entropy thereby violating the second law. The internal energy cannot increase at a slower rate than the temperature itself.

B. H. Lavenda

2011-10-23T23:59:59.000Z

490

The Galactic Center Black Hole Laboratory  

E-Print Network [OSTI]

The super-massive 4 million solar mass black hole Sagittarius~A* (SgrA*) shows flare emission from the millimeter to the X-ray domain. A detailed analysis of the infrared light curves allows us to address the accretion phenomenon in a statistical way. The analysis shows that the near-infrared flare amplitudes are dominated by a single state power law, with the low states in SgrA* limited by confusion through the unresolved stellar background. There are several dusty objects in the immediate vicinity of SgrA*. The source G2/DSO is one of them. Its nature is unclear. It may be comparable to similar stellar dusty sources in the region or may consist predominantly of gas and dust. In this case a particularly enhanced accretion activity onto SgrA* may be expected in the near future. Here the interpretation of recent data and ongoing observations are discussed.

Eckart, A; Valencia-S., M; Straubmeier, C; Zensus, J A; Karas, V; Kunneriath, D; Alberdi, A; Sabha, N; Schödel, R; Puetzfeld, D

2015-01-01T23:59:59.000Z

491

Post-Newtonian factorized multipolar waveforms for spinning, nonprecessing black-hole binaries  

SciTech Connect (OSTI)

We generalize the factorized resummation of multipolar waveforms introduced by Damour, Iyer, and Nagar to spinning black holes. For a nonspinning test particle spiraling a Kerr black hole in the equatorial plane, we find that factorized multipolar amplitudes which replace the residual relativistic amplitude f{sub lm} with its lth root, {rho}{sub lm}=f{sub lm}{sup 1/l}, agree quite well with the numerical amplitudes up to the Kerr-spin value q{<=}0.95 for orbital velocities v{<=}0.4. The numerical amplitudes are computed solving the Teukolsky equation with a spectral code. The agreement for prograde orbits and large spin values of the Kerr black-hole can be further improved at high velocities by properly factoring out the lower-order post-Newtonian contributions in {rho}{sub lm}. The resummation procedure results in a better and systematic agreement between numerical and analytical amplitudes (and energy fluxes) than standard Taylor-expanded post-Newtonian approximants. This is particularly true for higher-order modes, such as (2,1), (3,3), (3,2), and (4,4), for which less spin post-Newtonian terms are known. We also extend the factorized resummation of multipolar amplitudes to generic mass-ratio, nonprecessing, spinning black holes. Lastly, in our study we employ new, recently computed, higher-order post-Newtonian terms in several subdominant modes and compute explicit expressions for the half and one-and-half post-Newtonian contributions to the odd-parity (current) and even-parity (odd) multipoles, respectively. Those results can be used to build more accurate templates for ground-based and space-based gravitational-wave detectors.

Pan, Yi; Buonanno, Alessandra; Racine, Etienne [Maryland Center for Fundamental Physics and Joint Space-Science Institute, Department of Physics, University of Maryland, College Park, Maryland 20742 (United States); Fujita, Ryuichi [Raman Research Institute, Bangalore 560 080 (India); Tagoshi, Hideyuki [Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka 560 0043 (Japan)

2011-03-15T23:59:59.000Z

492

Geothermal Well Completion Tests | Open Energy Information  

Open Energy Info (EERE)

Geothermal Well Completion Tests Geothermal Well Completion Tests Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Geothermal Well Completion Tests Abstract This paper reviews the measurements that are typically made in a well immediately after drilling is completed - the Completion Tests. The objective of these tests is to determine the properties of the reservoir, and of the reservoir fluid near the well. A significant amount of information that will add to the characterisation of the reservoir and the well, can only be obtained in the period during and immediately after drilling activities are completed. Author Hagen Hole Conference Petroleum Engineering Summer School; Dubrovnik, Croatia; 2008/06/09 Published N/A, 2008 DOI Not Provided Check for DOI availability: http://crossref.org

493

Quasinormal frequencies of the Dirac field in a D-dimensional Lifshitz black hole  

E-Print Network [OSTI]

In a D-dimensional Lifshitz black hole we calculate exactly the quasinormal frequencies of a test Dirac field in the massless and zero angular eigenvalue limits. These results are an extension of the previous calculations in which the quasinormal frequencies of the Dirac field are determined, but in four dimensions. We discuss the four-dimensional limit of our expressions for the quasinormal frequencies and compare with the previous results. We also determine whether the Dirac field has unstable modes in the D-dimensional Lifshitz spacetime.

A. Lopez-Ortega

2014-07-03T23:59:59.000Z

494

Optical transitions of holes in uniaxially compressed germanium  

SciTech Connect (OSTI)

Spontaneous emission and photoconductivity of germanium with gallium impurity are studied for determining the energy spectrum of hole states in this material in which radiation can be induced as a result of transitions of holes between these states. Holes were excited by electric field pulses with a strength up to 12 kV/cm at T = 4.2 K under uniaxial compression of samples up to 12 kbar. It has been found that hole emission spectra for transitions between resonant and local states of the impurity have a structure identical to the photoconductivity and absorption spectra. Transitions from resonance states, which are associated with the heavy hole subband, have not been detected. It has been found that in an electric field lower than 100 V/cm, a compressed crystal emits as a result of transitions of heavy holes. In a strong electric field (1-3 kV/cm), emission is observed in the energy range up to 140 meV, and transitions with emission of TA and LO phonons appear in such a field. The emission spectra under pressures of 0 and 12 kbar differ insignificantly. Hence, it follows that the contributions from heavy and light holes in a strong electric field are indistinguishable.

Pokrovskii, Ya. E., E-mail: yaep@cplire.ru; Khvalkovskii, N. A. [Russian Academy of Sciences, Kotel'nikov Institute of Radio Engineering and Electronics (Russian Federation)] [Russian Academy of Sciences, Kotel'nikov Institute of Radio Engineering and Electronics (Russian Federation)

2013-10-15T23:59:59.000Z

495

Nonphotochemical hole burning and dispersive kinetics in amorphous solids  

SciTech Connect (OSTI)

Results covering burn intensities in the nW to {mu}W/cm{sup 2} range, of dispersive hole growth kinetics are reported for Oxazine 720 in glycerol glasses and polyvinyl alcohol polymer films and their deuterated analogues. A theoretical model which employs a distribution function for the hole burning rate constant based upon a Gaussian distribution for the tunnel parameter is shown to accurately describe the kinetic data. This model incorporates the linear electron-phonon coupling. A method for calculating the nonphotochemical quantum yield is presented which utilizes the Gaussian distribution of tunnel parameters. The quantum yield calculation can be extended to determine a quantum yield as a function of hole depth. The effect of spontaneous hole filling is shown to be insignificant over the burn intensity range studied. Average relaxation rates for hole burning are {approximately}8 orders of magnitude greater than for hole filling. The dispersive kinetics of hole burning are observed to be independent over the temperature range of these experiments, 1.6 to 7.0 K. 6 refs., 20 figs., 1 tab.

Kenney, M.J.

1990-09-21T23:59:59.000Z

496

Gauss-Bonnet black holes in dS spaces  

Science Journals Connector (OSTI)

We study the thermodynamic properties associated with the black hole horizon and cosmological horizon for the Gauss-Bonnet solution in de Sitter space. When the Gauss-Bonnet coefficient is positive, a locally stable small black hole appears in the case of spacetime dimension d=5, the stable small black hole disappears, and the Gauss-Bonnet black hole is always unstable quantum mechanically when d>~6. On the other hand, the cosmological horizon is found to be always locally stable independent of the spacetime dimension. But the solution is not globally preferred; instead, the pure de Sitter space is globally preferred. When the Gauss-Bonnet coefficient is negative, there is a constraint on the value of the coefficient, beyond which the gravity theory is not well defined. As a result, there is not only an upper bound on the size of black hole horizon radius at which the black hole horizon and cosmological horizon coincide with each other, but also a lower bound depending on the Gauss-Bonnet coefficient and spacetime dimension. Within the physical phase space, the black hole horizon is always thermodynamically unstable and the cosmological horizon is always stable; furthermore, as in the case of the positive coefficient, the pure de Sitter space is still globally preferred. This result is consistent with the argument that the pure de Sitter space corresponds to an UV fixed point of dual field theory.

Rong-Gen Cai and Qi Guo

2004-05-26T23:59:59.000Z

497

Acoustic white holes in flowing atomic Bose-Einstein condensates  

E-Print Network [OSTI]

We study acoustic white holes in a steadily flowing atomic Bose-Einstein condensate. A white hole configuration is obtained when the flow velocity goes from a super-sonic value in the upstream region to a sub-sonic one in the downstream region. The scattering of phonon wavepackets on a white hole horizon is numerically studied in terms of the Gross-Pitaevskii equation of mean-field theory: dynamical stability of the acoustic white hole is found, as well as a signature of a nonlinear back-action of the incident phonon wavepacket onto the horizon. The correlation pattern of density fluctuations is numerically studied by means of the truncated-Wigner method which includes quantum fluctuations. Signatures of the white hole radiation of correlated phonon pairs by the horizon are characterized; analogies and differences with Hawking radiation from acoustic black holes are discussed. In particular, a short wavelength feature is identified in the density correlation function, whose amplitude steadily grows in time since the formation of the horizon. The numerical observations are quantitatively interpreted by means of an analytical Bogoliubov theory of quantum fluctuations for a white hole configuration within the step-like horizon approximation.

Carlos Mayoral; Alessio Recati; Alessandro Fabbri; Renaud Parentani; Roberto Balbinot; Iacopo Carusotto

2010-09-30T23:59:59.000Z

498

Black Holes and the Third Law of Thermodynamics  

E-Print Network [OSTI]

We discuss in the framework of black hole thermodynamics some aspects relative to the third law in the case of black holes of the Kerr-Newman family. In the light of the standard proof of the equivalence between the unattainability of the zero temperature and the entropic version of the third law it is remarked that the unattainability has a special character in black hole thermodynamics. Also the zero temperature limit which obtained in the case of very massive black holes is discussed and it is shown that a violation of the entropic version in the charged case occurs. The violation of the Bekenstein-Hawking law in favour of zero entropy S_E=0 in the case of extremal black holes is suggested as a natural solution for a possible violation of the second law of thermodynamics. Thermostatic arguments in support of the unattainability are explored, and $S_E=0$ for extremal black holes is shown to be again a viable solution. The third law of black hole dynamics by W.Israel is then interpreted as a further strong corroboration to the picture of a discontinuity between extremal states and non-extremal ones.

F. Belgiorno; M. Martellini

2002-10-08T23:59:59.000Z

499

Dynamical evolution of quasi-circular binary black hole data  

E-Print Network [OSTI]

We study the fully nonlinear dynamical evolution of binary black hole data, whose orbital parameters are specified via the effective potential method for determining quasi-circular orbits. The cases studied range from the Cook-Baumgarte innermost stable circular orbit (ISCO) to significantly beyond that separation. In all cases we find the black holes to coalesce (as determined by the appearance of a common apparent horizon) in less than half an orbital period. The results of the numerical simulations indicate that the initial holes are not actually in quasi-circular orbits, but that they are in fact nearly plunging together. The dynamics of the final horizon are studied to determine physical parameters of the final black hole, such as its spin, mass, and oscillation frequency, revealing information about the inspiral process. We show that considerable resolution is required to extract accurate physical information from the final black hole formed in the merger process, and that the quasi-normal modes of the final hole are strongly excited in the merger process. For the ISCO case, by comparing physical measurements of the final black hole formed to the initial data, we estimate that less than 3% of the total energy is radiated in the merger process.

Miguel Alcubierre; Bernd Bruegmann; Peter Diener; F. Siddhartha Guzman; Ian Hawke; Scott Hawley; Frank Herrmann; Michael Koppitz; Denis Pollney; Edward Seidel; Jonathan Thornburg

2004-11-30T23:59:59.000Z

500

Minerals and Mining Program (South Dakota) | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

and Mining Program (South Dakota) and Mining Program (South Dakota) Minerals and Mining Program (South Dakota) < Back Eligibility Commercial Developer Fed. Government Industrial Installer/Contractor Investor-Owned Utility Local Government Municipal/Public Utility Rural Electric Cooperative State/Provincial Govt Tribal Government Utility Program Info State South Dakota Program Type Siting and Permitting Provider South Dakota Department of Environment and Natural Resources The Minerals and Mining Program has the authority to oversee mining activities in the state and issue regulations pertaining to the permitting and environmental impact mitigation of, and reclamation following, exploration, mining, and oil and gas production. Exploration and mining activities require permits, and mines require licenses for construction and