Sample records for deepwater horizon blowout

  1. Deepwater Horizon Situation Report #5

    SciTech Connect (OSTI)

    none,

    2010-06-10T23:59:59.000Z

    At approximately 11:00 pm EDT April 20, 2010 an explosion occurred aboard the Deepwater Horizon mobile offshore drilling unit (MODU) located 52 miles Southeast of Venice, LA and 130 miles southeast of New Orleans, LA. The MODU was drilling an exploratory well and was not producing oil at the time of the incident. The Deepwater Horizon MODU sank 1,500 feet northwest of the well site. Detailed information on response and recovery operations can be found at: http://www.deepwaterhorizonresponse.com/go/site/2931/

  2. Microsoft PowerPoint - Deepwater Horizon Containment - 30 JUN...

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

    Deepwater Horizon Containment - 30 JUN.ppt Microsoft PowerPoint - Deepwater Horizon Containment - 30 JUN.ppt Microsoft PowerPoint - Deepwater Horizon Containment - 30 JUN.ppt More...

  3. Deepwater Horizon Oil Spill; Draft Programmatic and Phase III Early

    E-Print Network [OSTI]

    Deepwater Horizon Oil Spill; Draft Programmatic and Phase III Early Restoration Plan of the Deepwater Horizon oil spill. The restoration alternatives are comprised of early restoration project types Addressing Injuries Resulting from the Deepwater Horizon Oil Spill (Framework Agreement). Criteria

  4. Deepwater Horizon Disaster Professor Satish Nagarajaiah

    E-Print Network [OSTI]

    Nagarajaiah, Satish

    Systems Research @ Rice Source: MMS and BP #12;April 20, 2010 At approximately 10 pm Horizon Rig disaster;Collapse / Oil Spill Offshore and Marine Systems Research @ Rice Source: NYT/AP/flickr #12;Horizon BeforeDeepwater Horizon Disaster Professor Satish Nagarajaiah Dept. of Civil & Env. Eng. , Dept

  5. LIVE: Meeting on Strengthening Deepwater Blowout Containment Capabilities

    Broader source: Energy.gov [DOE]

    Secretary Chu and Secretary of the Interior Ken Salazar convened with top U.S. government scientists and key industry and stakeholder leaders to discuss how to strengthen capabilities for responding to potential blowouts of oil and gas wells on the Outer Continental Shelf.

  6. Joint Information CenterJoint Information Center Deepwater Horizon Response

    E-Print Network [OSTI]

    when they see the birds that have been impacted by the Deepwa- ter Horizon/BP oil spill. While and it is determined to be within the Deepwater Horizon Oil Spill Re- sponse area, a wildlife response team is notifiedJoint Information CenterJoint Information Center Deepwater Horizon Response Incident Command Post

  7. The Deepwater Horizon Disaster: What Happened and Why

    SciTech Connect (OSTI)

    Horne, Roland N. (Stanford University) [Stanford University

    2011-01-05T23:59:59.000Z

    The Deepwater Horizon disaster was the largest oil spill in US history, and the second largest spill in the world. 11 men lost their lives in the explosion and fire. Although the impacts of the spill were evident to large numbers of people, its causes were harder to see. This lecture will focus on the technical aspects of the events that led to the spill itself: what happened on the rig before, during and after the event, up to the time the rig sank. As with many engineering disasters, the accident was due to a sequence of failures, including both technical systems and procedural issues. Although the causes were complex and interacting, the lecture will focus on four main problems: (1) the failure of the cement and casing seal, (2) the failure to recognize and respond to hydrocarbon flow into the riser, (3) the ignition of hydrocarbons on the rig, and (4) the failure of the blow-out preventer (BOP) to seal the well. The lecture will conclude with some suggestions as to how events such as the Deepwater Horizon disaster can be avoided in the future. (Roland N. Horne is the Thomas Davies Barrow Professor of Earth Sciences at Stanford University, and was the Chairman of Petroleum Engineering from 1995 to 2006. He holds BE, PhD and DSc degrees from the University of Auckland, New Zealand, all in Engineering Science. Horne is a member of the U.S. National Academy of Engineering and is also an Honorary Member of the Society of Petroleum Engineers.)

  8. Organic Aerosol Formation Downwind from the Deepwater Horizon Oil Spill

    E-Print Network [OSTI]

    Toohey, Darin W.

    Organic Aerosol Formation Downwind from the Deepwater Horizon Oil Spill Nicole ONeill - ATOC 3500 and aerosol composition of air over the Deepwater Horizon oil spill in the Gulf of Mexico. · The lightest chemicals in the oil evaporated within hours, as scientists expected them to do. What they didn't expect

  9. Acoustic measurement of the Deepwater Horizon Macondo well flow rate

    E-Print Network [OSTI]

    Camilli, Richard

    On May 31, 2010, a direct acoustic measurement method was used to quantify fluid leakage rate from the Deepwater Horizon Macondo well prior to removal of its broken riser. This method utilized an acoustic imaging sonar and ...

  10. Deepwater Horizon Study Finds Crude Oil Harmful to Bluefin, Yellowfin Tuna

    E-Print Network [OSTI]

    Grosell, Martin

    , as a large plume of smoke rises from fires on BP's Deepwater Horizon offshore oil rig. Image: Gerald Herbert Deepwater Horizon oil spill caused malformations in developing hearts of yellowfin and bluefin tuna the Deepwater Horizon spill. An Atlantic bluefin tuna. Image: Wikimedia Commons #12;They found a variety

  11. Atmospheric emissions from the Deepwater Horizon spill constrain airwater partitioning, hydrocarbon fate, and leak rate

    E-Print Network [OSTI]

    Toohey, Darin W.

    Atmospheric emissions from the Deepwater Horizon spill constrain airwater partitioning, hydrocarbon amounts (258,000 kg/day) of hydrocarbons evaporating promptly from the Deepwater Horizon spill; these data. Citation: Ryerson, T. B., et al. (2011), Atmo- spheric emissions from the Deepwater Horizon spill constrain

  12. Interlaboratory Analytical Comparison Study to Support Deepwater Horizon

    E-Print Network [OSTI]

    Resource Damage Assessment: Description and Results for Marine Sediment QA10SED01 Michele M. Schantz resource damage assessment (NRDA) in response to the Deepwater Horizon (DWH) oil spill in the Gulf are conducting a natural resource damage assessment (NRDA) to determine what resources have been injured and what

  13. Interlaboratory Analytical Comparison Study to Support Deepwater Horizon

    E-Print Network [OSTI]

    Resource Damage Assessment: Description and Results for Mussel Tissue QA10TIS01 Michele M. Schantz and John resource damage assessment (NRDA) in response to the Deepwater Horizon (DWH) oil spill in the Gulf and state agencies are conducting a natural resource damage assessment (NRDA) to determine what resources

  14. Deepwater Horizon Study Group 3 Environmental Report January 2011

    E-Print Network [OSTI]

    Silver, Whendee

    to 53,000 barrels a day as the reservoir gradually depleted itself. 4.9 million barrels (205.8 million The Deepwater Horizon oil rig exploded 5,000 feet below the surface of the Gulf of Mexico on April 20, 2010. The Flow Rate Technical Group estimates the leak initially produced 62,000 barrels of oil a day and eased

  15. Microbial gene functions enriched in the Deepwater Horizon deep-sea oil plume

    E-Print Network [OSTI]

    Lu, Z.

    2012-01-01T23:59:59.000Z

    Horizon oil spill in the Gulf of Mexico is the deepest andof Gulf of Mexico from other historic offshore oil spillsDeepwater Horizon oil spill in the Gulf of Mexico was one of

  16. DOE's Portal to Deepwater Horizon Oil Spill Data

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

    On April 20, 2010, the Deepwater Horizon platform in the Gulf of Mexico exploded. The explosion and fire killed and injured workers on the oil rig, and caused major releases of oil and gas into the Gulf for several months. The Department of Energy, in keeping with the Obama Administrations ongoing commitment to transparency, provided online access to data and information related to the response to the BP oil spill. Included are schematics, pressure tests, diagnostic results, video clips, and other data. There are also links to the Restore the Gulf website, to the trajectory forecasts from NOAA, and oil spill information from the Environmental Protection Agency.

  17. Did the northeastern Gulf of Mexico become greener after the Deepwater Horizon oil spill?

    E-Print Network [OSTI]

    Meyers, Steven D.

    #12;Did the northeastern Gulf of Mexico become greener after the Deepwater Horizon oil spill; published 3 May 2011. [1] Assessment of direct and indirect impacts of oil and dispersants on the marine ecosystem in the northeastern Gulf of Mexico (NEGOM) from the Deepwater Horizon oil spill (April ­ July 2010

  18. Genomic and physiological footprint of the Deepwater Horizon oil spill on resident marsh fishes

    E-Print Network [OSTI]

    Whitehead, Andrew

    ­9, 2010), during the peak of oil landfall (June 28­30, 2010), and after much of the surface oilGenomic and physiological footprint of the Deepwater Horizon oil spill on resident marsh fishes June 13, 2011) The biological consequences of the Deepwater Horizon oil spill are unknown, especially

  19. Office of Response and Restoration Emergency Response Division Deepwater Horizon BP Oil Spill

    E-Print Network [OSTI]

    Office of Response and Restoration · Emergency Response Division Deepwater Horizon BP Oil Spill result if oil spilling from the Deepwater Horizon site continues until a relief well successfully stops based on a scenario that assumes a significant continuing spill. Some of these impacts may be weeks

  20. Chemical fingerprinting of petroleum biomarkers in Deepwater Horizon oil spill samples collected from Alabama shoreline

    E-Print Network [OSTI]

    Clement, Prabhakar

    Chemical fingerprinting of petroleum biomarkers in Deepwater Horizon oil spill samples collected of Civil Engineering, Auburn University, Auburn, AL 36849, USA a r t i c l e i n f o Keywords: BP oil spill Deepwater Horizon oil spill Hopane analysis Fingerprinting Tar balls a b s t r a c t We compare

  1. Submesoscale dispersion in the vicinity of the Deepwater Horizon spill

    E-Print Network [OSTI]

    Poje, Andrew C; Lipphardt,, Bruce; Haus, Brian K; Ryan, Edward H; Haza, Angelique C; Reniers, A J H M; Olascoaga, Josefina; Novelli, Guillaume; Beron-Vera, Francisco J; Chen, Shuyi; Mariano, Arthur J; Jacobs, Gregg; Hogan, Pat; Coelho, Emanuel; Kirwan,, A D; Huntley, Helga; Griffa, Annalisa

    2014-01-01T23:59:59.000Z

    Reliable forecasts for the dispersion of oceanic contamination are important for coastal ecosystems, society and the economy as evidenced by the Deepwater Horizon oil spill in the Gulf of Mexico in 2010 and the Fukushima nuclear plant incident in the Pacific Ocean in 2011. Accurate prediction of pollutant pathways and concentrations at the ocean surface requires understanding ocean dynamics over a broad range of spatial scales. Fundamental questions concerning the structure of the velocity field at the submesoscales (100 meters to tens of kilometers, hours to days) remain unresolved due to a lack of synoptic measurements at these scales. \\textcolor{black} {Using high-frequency position data provided by the near-simultaneous release of hundreds of accurately tracked surface drifters, we study the structure of submesoscale surface velocity fluctuations in the Northern Gulf Mexico. Observed two-point statistics confirm the validity of classic turbulence scaling laws at 200m$-$50km scales and clearly indicate tha...

  2. Review of “Deepwater Horizon Release Estimate of Rate by PIV”

    SciTech Connect (OSTI)

    Onishi, Yasuo

    2010-06-01T23:59:59.000Z

    The Plume Calculation Team (PCT) conducted high quality work within a very short period of time, in spite of needing to use less than ideal quality videos provided by British Petroleum (BP), especially those made before the cutoff of the riser above the Blow Out Preventer (BOP) on June 3, 2010. There are at least two valid approaches for estimating the oil discharge coming out from the Deepwater Horizon broken pipeline and its riser, using BP videotapes. One method is to estimate the exit velocity directly with the use of the Particle Image Velocimetry (PIV). The second method is to use a buoyant plume analysis to determine the exit velocity. The PCT used both of these methods.

  3. Deepwater Horizon oil left tuna, other species with heart defects likely to prove fatal

    E-Print Network [OSTI]

    Grosell, Martin

    shows that the 2010 BP oil spill spawned deformities in bluefin tuna thereby impeding their ability Horizon oil spill struck at the very heart of fish, a new study says. Exposed to millions of gallons anniversary of the Exxon Valdez oil spill in Alaska's Prince William Sound. Oil from Deepwater Horizon spill

  4. The 2010 Deepwater Horizon (DH) oil spill in the Gulf of Mexico was unprecedented in both its magnitude --nearly 5

    E-Print Network [OSTI]

    Entekhabi, Dara

    PROBLEM The 2010 Deepwater Horizon (DH) oil spill in the Gulf of Mexico was unprecedented in both of Mexico during the Deepwater Horizon oil spill. This satellite image shows the oil slick off its magnitude -- nearly 5 million barrels of oil spilled over nearly three months -- and its location

  5. National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling THE AMOUNT AND FATE OF THE OIL

    E-Print Network [OSTI]

    Meyers, Steven D.

    - 1 - National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling THE AMOUNT AND FATE OF THE OIL ---Draft--- Staff Working Paper No. 3 Staff Working Papers are written by the staff of the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling for the use of members

  6. Study: Exposure to crude oil from the Deepwater Horizon disaster causes swimming deficiencies in juvenile mahi mahi

    E-Print Network [OSTI]

    Grosell, Martin

    , the 2010 Deepwater Horizon oil spill also had profound impacts on the open ocean and deep sea environmentStudy: Exposure to crude oil from the Deepwater Horizon disaster causes swimming deficiencies in juvenile mahi mahi Posted on June 12, 2014 by Bob Berwyn Evidence is mounting that BP's oil harmed millions

  7. Disturbance and Recovery of Salt Marsh Arthropod Communities following BP Deepwater Horizon Oil Spill

    E-Print Network [OSTI]

    Pennings, Steven C.

    Disturbance and Recovery of Salt Marsh Arthropod Communities following BP Deepwater Horizon Oil of Houston, Houston, Texas, United States of America Abstract Oil spills represent a major environmental.S. Gulf of Mexico is a hub of oil and gas exploration activities that historically have impacted

  8. New insights into microbial responses to oil spills from the Deepwater Horizon incident

    SciTech Connect (OSTI)

    Mason, O.U.; Hazen, T.C.

    2011-06-15T23:59:59.000Z

    On April 20, 2010, a catastrophic eruption of methane caused the Deepwater Horizon exploratory drill rig drilling the Macondo Well in Mississippi Canyon Block 252 (MC252) to explode. The Deepwater Horizon oil spill was unprecendeted for several reasons: the volume of oil released; the spill duration; the well depth; the distance from the shore-line (77 km or about 50 miles); the type of oil (light crude); and the injection of dispersant directly at the wellhead. This study clearly demonstrated that there was a profound and significant response by certain members of the in situ microbial community in the deep-sea in the Gulf of Mexico. In particular putative hydrocarbon degrading Bacteria appeared to bloom in response to the Deepwater Horizon oil spill, even though the temperature at these depths is never >5 C. As the plume aged the shifts in the microbial community on a temporal scale suggested that different, yet metabolically important members of the community were able to respond to a myriad of plume constituents, e.g. shifting from propane/ethane to alkanes and finally to methane. Thus, the biodegradation of hydrocarbons in the plume by Bacteria was a highly significant process in the natural attenuation of many compounds released during the Deepwater Horizon oil spill.

  9. Estimating Surface Oil Extent from the Deepwater Horizon Oil Spill using ASCAT Backscatter

    E-Print Network [OSTI]

    Long, David G.

    Estimating Surface Oil Extent from the Deepwater Horizon Oil Spill using ASCAT Backscatter Richard Provo, UT 84602 Abstract--The damping effects of oil on capillary ocean waves alter the backscattered backscatter from the ocean surface uncontaminated by surface oil. Large differences between expected

  10. Level and Degradation of Deepwater Horizon Spilled Oil in Coastal Marsh Sediments and Pore-Water

    E-Print Network [OSTI]

    Wang, Yang

    Level and Degradation of Deepwater Horizon Spilled Oil in Coastal Marsh Sediments and Pore the 2010 BP Macondo-1 well oil spill. Very high levels (10-28%) of organic carbon within the heavily oiled chromatograph spectra are in a remarkable narrow range among spilled oils and initial BP crude. At oiled sites

  11. Deepwater Horizon Oil Spill Principal Investigator (PI) Conference Sponsored by the NSTC SOST, hosted by the University of South Florida

    E-Print Network [OSTI]

    Meyers, Steven D.

    Deepwater Horizon Oil Spill Principal Investigator (PI) Conference Sponsored Ballroom · Oil/dispersant - extent and fate Tom Ryerson, National Oceanic and Atmospheric Administration · Oil/dispersant - impacts and mitigation in coastal

  12. British Petroleum's Deepwater Horizon Accident and the Thinking, Engaged Workforce - 13265

    SciTech Connect (OSTI)

    Rigot, William L. [Fluor Corporation, Technical Support Services (United States)] [Fluor Corporation, Technical Support Services (United States)

    2013-07-01T23:59:59.000Z

    On April 20, 2010, hydrocarbons escaped from the Macondo well into Transocean's Deepwater Horizon, resulting in fire and multiple explosions. 11 people on the rig died. The billion dollar Deepwater Horizon sank. 4.9 M gallons of product flowed from the well for 87 days creating an environmental nightmare for communities bordering on the Gulf of Mexico. BP established a $20 B reserve to pay for damages. Investigations and legal culpability continue to this day. In September 2010, the Institute for Nuclear Power Operators (INPO) issued Significant Operating Experience Report (SOER) 10-2, Engaged, Thinking Organizations. The industry had experienced 11 events, 9 in US commercial nuclear utilities, and 2 international, that had disturbing trends. The underlying causes highlighted by INPO were inadequate recognition of risk, weaknesses in application of significant operating experience, tolerance of equipment and personnel problems, and a significant drift in standards. While the noted INPO problems and the Deepwater Horizon event appear to have nothing in common, they do exhibit similarities in a drift away from expected behavior on the part of front line workers and their supervisors. At the same time, hidden hazards are accumulating in the environment leading to error intolerant conditions. Without a good understanding of this concept, many organizations tend to focus on the person who 'touched it last', while missing the deeper organizational factors that led that individual to think that what they were doing was correct. An understanding of this failure model is important in reconstruction of events and crafting effective corrective actions. It is much more important, however, for leaders in high hazard industries to recognize when they are approaching error intolerant conditions and take steps immediately to add safety margin. (authors)

  13. Microbial gene functions enriched in the Deepwater Horizon deep-sea oil plume

    SciTech Connect (OSTI)

    Lu, Z.; Deng, Y.; Nostrand, J.D. Van; He, Z.; Voordeckers, J.; Zhou, A.; Lee, Y.-J.; Mason, O.U.; Dubinsky, E.; Chavarria, K.; Tom, L.; Fortney, J.; Lamendella, R.; Jansson, J.K.; D?haeseleer, P.; Hazen, T.C.; Zhou, J.

    2011-06-15T23:59:59.000Z

    The Deepwater Horizon oil spill in the Gulf of Mexico is the deepest and largest offshore spill in U.S. history and its impacts on marine ecosystems are largely unknown. Here, we showed that the microbial community functional composition and structure were dramatically altered in a deep-sea oil plume resulting from the spill. A variety of metabolic genes involved in both aerobic and anaerobic hydrocarbon degradation were highly enriched in the plume compared to outside the plume, indicating a great potential for intrinsic bioremediation or natural attenuation in the deep-sea. Various other microbial functional genes relevant to carbon, nitrogen, phosphorus, sulfur and iron cycling, metal resistance, and bacteriophage replication were also enriched in the plume. Together, these results suggest that the indigenous marine microbial communities could play a significant role in biodegradation of oil spills in deep-sea environments.

  14. Deep-Diving Cetaceans of the Gulf of Mexico : : Acoustic Ecology and Response to Natural and Anthropogenic Forces Including the Deepwater Horizon Oil Spill

    E-Print Network [OSTI]

    Merkens, Karlina Paul

    2013-01-01T23:59:59.000Z

    2.4.1 Seasonal and Oil-spill related trends . . 2.4.2 Diel1.4 The Deepwater Horizon Oil Spill . . . . 1.5 DataOil Figure Figure Figure Figure Figure Figure Figure Figure

  15. 5/10/10 7:22 AMTerry Hazen, Berkeley Lab: Deepwater Horizon Spill Detergents Could Make Bad Situation Worse Page 1 of 3http://www.outlookseries.com/N7/Science/3910_Terry_Hazen_Berkeley_La...water_Horizon_Spill_Detergents_Could_Situation_Worse_Terry_Hazen.

    E-Print Network [OSTI]

    Hazen, Terry

    5/10/10 7:22 AMTerry Hazen, Berkeley Lab: Deepwater Horizon Spill Detergents Could Make Bad Situation Worse Page 1 of 3http://www.outlookseries.com/N7/Science/3910_Terry_Hazen_Berkeley_La...water_Horizon_Spill Terry Hazen, Berkeley Lab: Deepwater Horizon Spill Detergents Could Make Bad Situation Worse May 6, 2010

  16. Environmental disaster or just a drop in the bucket?: Texas scientists on the real effects of the Deepwater Horizon oil spill 

    E-Print Network [OSTI]

    Lee, Leslie

    2011-01-01T23:59:59.000Z

    Winter 2011 tx H2O 3 or just a drop in thebucket?Texas scientists on the real e#31;ects of the Deepwater Horizon oil spill 4 tx H2O Winter 2011 Environmental Disaster Continued What if gasoline pumped into cars, seafood eaten at restaurants... but forgo#27;en as the wreckage of the Deepwater Horizon MC#31;#30;#31; drilling platform sank into its waters. A crude awakening Like any large oil spill, this one took its toll in many ways. Eleven BP employees on the rig died in the explosion...

  17. Trajectory Forecast as a Rapid Response to the Deepwater Horizon Oil Spill Yonggang Liu, Robert H. Weisberg, Chuanmin Hu, and Lianyuan Zheng

    E-Print Network [OSTI]

    Meyers, Steven D.

    offshore oil spill in U.S. history. This spill, which continued for 3 months, presented an unprecedented spills in many ways. Crude oil was introduced at the ocean bottom in 1500 m of water, a depthTrajectory Forecast as a Rapid Response to the Deepwater Horizon Oil Spill Yonggang Liu, Robert H

  18. Of the estimated 5 million barrels of crude oil released into the Gulf of Mexico from the Deepwater Horizon oil spill, a

    E-Print Network [OSTI]

    Weston, Ken

    Of the estimated 5 million barrels of crude oil released into the Gulf of Mexico from the Deepwater Horizon oil spill, a fraction washed ashore onto sandy beaches from Louisiana to the Florida panhandle. Researchers at the MagLab compare the detailed molecular analysis of hydrocarbons in oiled sands from

  19. DEEPWATER HORIZON OIL SPILL ESTIMATE: UPDATE JUNE 11, 2010 by Professor Satish Nagarajaiah, Rice University (www.ruf.rice.edu/~nagaraja &

    E-Print Network [OSTI]

    Nagarajaiah, Satish

    DEEPWATER HORIZON OIL SPILL ESTIMATE: UPDATE JUNE 11, 2010 by Professor Satish Nagarajaiah, Rice. http://www.nytimes.com/2010/06/11/us/11spill.html?hp New Estimates Double Rate of Oil Flowing on Thursday essentially doubled its estimate of how much oil has been spewing from the out-of-control BP well

  20. DeepwaterHorizonOilSpill DraftPhaseIIEarlyRestorationPlan

    E-Print Network [OSTI]

    treasure. Its natural resources ­ water, fish, beaches, reefs, marshes, oil and gas ­ are the economic to the resource-dependent economy of the region. While the extent of natural resources impacted by the Deepwater of food, energy and recreation. The Gulf Coast's unique culture and natural beauty are world

  1. Risk assessment of surface vs subsea blowout preventers (bops) on mobile offshore drilling units focusing on riser failure and the use of subsea shear rams 

    E-Print Network [OSTI]

    Melendez, Jorge Luis

    2006-08-16T23:59:59.000Z

    The use of a slim, high-pressure drilling riser for surface blowout preventer operations in the deepwater Gulf of Mexico was assessed as an alternative to conventional drilling procedures from floating units. Comparison ...

  2. Blowout risks still growing concern

    SciTech Connect (OSTI)

    Not Available

    1982-02-01T23:59:59.000Z

    Research into blowout prevention and control is one of the most active areas in the offshore oil industry. Drilling relief wells is the most common method for killing underwater blowouts. Platform blowouts offshore the US are most commonly controlled by mud circulation (55%), capping (35%), and relief wells (10%). Some control methods mentioned were: annulus killing, production casing shear ram, mechanized drill pipe handling, drill-stem telemetry, mud monitors and the best available blowout preventer stacks. Three methods for reducing the fire risk were: down-hole water injection, improved deluge systems for the wellhead deck, and elimination of ignition sources. Containment concepts included: surface containment device, devices positioned in the oil plume, and those which provide containment at the spill sources. (DP)

  3. 2534 IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 50, NO. 7, JULY 2012 Mapping Surface Oil Extent From the Deepwater

    E-Print Network [OSTI]

    Long, David G.

    THE OIL spill from the Deepwater Horizon oil rig in the Gulf of Mexico is one of the largest environmental Oil Extent From the Deepwater Horizon Oil Spill Using ASCAT Backscatter Richard D. Lindsley, Student Member, IEEE, and David G. Long, Fellow, IEEE Abstract--The 2010 Deepwater Horizon oil spill in the Gulf

  4. PHYSICAL PARAMETERS OF STANDARD AND BLOWOUT JETS

    SciTech Connect (OSTI)

    Pucci, Stefano; Romoli, Marco [Department of Physics and Astronomy, University of Firenze, I-50121 Firenze (Italy); Poletto, Giannina [INAF-Arcetri Astrophysical Observatory, I-50125 Firenze (Italy); Sterling, Alphonse C., E-mail: stpucci@arcetri.astro.it [Space Science Office, NASA/MSFC, Huntsville, Al 35812 (United States)

    2013-10-10T23:59:59.000Z

    The X-ray Telescope on board the Hinode mission revealed the occurrence, in polar coronal holes, of much more numerous jets than previously indicated by the Yohkoh/Soft X-ray Telescope. These plasma ejections can be of two types, depending on whether they fit the standard reconnection scenario for coronal jets or if they include a blowout-like eruption. In this work, we analyze two jets, one standard and one blowout, that have been observed by the Hinode and STEREO experiments. We aim to infer differences in the physical parameters that correspond to the different morphologies of the events. To this end, we adopt spectroscopic techniques and determine the profiles of the plasma temperature, density, and outflow speed versus time and position along the jets. The blowout jet has a higher outflow speed, a marginally higher temperature, and is rooted in a stronger magnetic field region than the standard event. Our data provide evidence for recursively occurring reconnection episodes within both the standard and the blowout jet, pointing either to bursty reconnection or to reconnection occurring at different locations over the jet lifetimes. We make a crude estimate of the energy budget of the two jets and show how energy is partitioned among different forms. Also, we show that the magnetic energy that feeds the blowout jet is a factor of 10 higher than the magnetic energy that fuels the standard event.

  5. Systems and methods for detection of blowout precursors in combustors

    DOE Patents [OSTI]

    Lieuwen, Tim C.; Nair, Suraj

    2006-08-15T23:59:59.000Z

    The present invention comprises systems and methods for detecting flame blowout precursors in combustors. The blowout precursor detection system comprises a combustor, a pressure measuring device, and blowout precursor detection unit. A combustion controller may also be used to control combustor parameters. The methods of the present invention comprise receiving pressure data measured by an acoustic pressure measuring device, performing one or a combination of spectral analysis, statistical analysis, and wavelet analysis on received pressure data, and determining the existence of a blowout precursor based on such analyses. The spectral analysis, statistical analysis, and wavelet analysis further comprise their respective sub-methods to determine the existence of blowout precursors.

  6. The Path to Disaster The Deepwater Horizon

    E-Print Network [OSTI]

    Pym, David J.

    The accident · 20th April 2010 · Hydrocarbons escaped into the well while it was being underbalanced

  7. Data from Deepwater Horizon | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 1112011AT&T,Office of Policy, OAPMMilestone | DepartmentEACompound (DecemberofDataofData from

  8. Annual Graduate Student Symposium Schedule Time Presenter Title

    E-Print Network [OSTI]

    Meyers, Steven D.

    of the Mississippi River Diversions During the Deepwater Horizon Oil Spill 10:1510:30 am Rebekka Larson Shifts Petroleum Dispersal and Partitioning After the Deepwater Horizon Blowout 99:15 am Robert Ulrich Grouper in Depositional Patterns in the NE Gulf of Mexico Following the 2010 BP Blowout Event: Stratigraphy

  9. Well blowout rates in California Oil and Gas District 4--Update and Trends

    E-Print Network [OSTI]

    Benson, Sally M.

    2010-01-01T23:59:59.000Z

    Trends Table 3: Drilling Blowouts, Wells Drilled, Rates andfluid volume. Well construction includes drilling, reworking3 and 4. The drilling blowout rate per well from 1991 to

  10. Marine Turtle Newsletter No. 130, 2011 -Page 1 Issue Number 130 November 2011

    E-Print Network [OSTI]

    Sprintall, Janet

    -7708 Articles Guest Editorial: Did the BP-Deepwater Horizon-Macondo Oil Spill Change the Age Structure. 130, 2011 - Page 1 Guest Editorial: Did the BP-Deepwater Horizon-Macondo Oil Spill Change the Age-Deepwater Horizon-Macondo well blowout on 20 April 2010 and the ensuing oil spill in the northeastern Gulf of Mexico

  11. DICHOTOMY OF SOLAR CORONAL JETS: STANDARD JETS AND BLOWOUT JETS

    SciTech Connect (OSTI)

    Moore, Ronald L.; Cirtain, Jonathan W.; Sterling, Alphonse C.; Falconer, David A., E-mail: ron.moore@nasa.go [Space Science Office, VP62, Marshall Space Flight Center, Huntsville, AL 35812 (United States)

    2010-09-01T23:59:59.000Z

    By examining many X-ray jets in Hinode/X-Ray Telescope coronal X-ray movies of the polar coronal holes, we found that there is a dichotomy of polar X-ray jets. About two thirds fit the standard reconnection picture for coronal jets, and about one third are another type. We present observations indicating that the non-standard jets are counterparts of erupting-loop H{alpha} macrospicules, jets in which the jet-base magnetic arch undergoes a miniature version of the blowout eruptions that produce major coronal mass ejections. From the coronal X-ray movies we present in detail two typical standard X-ray jets and two typical blowout X-ray jets that were also caught in He II 304 A snapshots from STEREO/EUVI. The distinguishing features of blowout X-ray jets are (1) X-ray brightening inside the base arch in addition to the outside bright point that standard jets have, (2) blowout eruption of the base arch's core field, often carrying a filament of cool (T {approx} 10{sup 4} - 10{sup 5} K) plasma, and (3) an extra jet-spire strand rooted close to the bright point. We present cartoons showing how reconnection during blowout eruption of the base arch could produce the observed features of blowout X-ray jets. We infer that (1) the standard-jet/blowout-jet dichotomy of coronal jets results from the dichotomy of base arches that do not have and base arches that do have enough shear and twist to erupt open, and (2) there is a large class of spicules that are standard jets and a comparably large class of spicules that are blowout jets.

  12. Evaluation of Annular Pressure Buildup (APB) during WCD Blowout of Deepwater Hp/Ht Wells

    E-Print Network [OSTI]

    Taghizadeh Ansari, Matin

    2014-12-15T23:59:59.000Z

    . 12 WELLCATTM models any standard hydrocarbons composed of dry or free gas, oil and dissolved gas, vapor-liquids without heavy oil, and dissolved gas. The oil properties can be calculated by oil API gravity, while gas properties are modeled using... and Environmental Enforcement FWHP Flowing Well Head Pressure FBHP Flowing Bottom Hole Pressure CGR Condensate Gas Ratio GLR Gas Liquid Ratio API American Petroleum Association SRK Soave-Redlich-Kwong VLE Vapor-Liquid Equilibrium PR Peng-Robinson GOR Gas...

  13. ULTRA-DEEPWATER ADVISORY COMMITTEE

    Energy Savers [EERE]

    is aimed at a very broad target (to advance research in any aspect of ultra deepwater petroleum exploration and production) this was an ideal environment to address subjects...

  14. Ultrapdeep water blowouts: COMASim dynamic kill simulator validation and best practices recommendations 

    E-Print Network [OSTI]

    Noynaert, Samuel F.

    2005-02-17T23:59:59.000Z

    Statistically..................................................................... 7 1.4 Blowout Control Measures............................................................. 13 1.5 Kill Method Selection...................................................................................... 3 1.3 Crew evacuation after blowout ........................................................................... 3 1.4 The well is abandoned and out of control ........................................................... 3 1.5 Derrick...

  15. Lean Blow-Out Prediction in Gas Turbine Combustors Using Symbolic Time Series Analysis

    E-Print Network [OSTI]

    Ray, Asok

    Lean Blow-Out Prediction in Gas Turbine Combustors Using Symbolic Time Series Analysis Achintya of lean blowout in gas turbine combustors based on symbolic analysis of time series data from optical. For the purpose of detecting lean blowout in gas turbine combustors, the state probability vector obtained

  16. Numerical analysis of a shear ram and experimental determination of fracture parameters

    E-Print Network [OSTI]

    Koutsolelos, Evangelos

    2012-01-01T23:59:59.000Z

    The human, economic and environmental disaster that followed the Deepwater Horizon catastrophe at the Gulf of Mexico in April 2010 revealed how much the offshore drilling industry relies on the Blowout Preventer (BOP) as ...

  17. ORISE: White paper analyzes Deepwater Horizon event for improving...

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

    2009 U.S. Department of EnergyNational Nuclear Security Administration sponsored Full-Scale Exercise to demonstrate effective management of the response to a domestic...

  18. Interlaboratory Analytical Comparison Study to Support Deepwater Horizon

    E-Print Network [OSTI]

    , crude oil QA10OIL01 reported here. In this exercise, selected polycyclic aromatic hydrocarbons (PAHs), alkylated PAHs, hopanes, and steranes were determined in the exercise material, which consisted of a crude, water, sediment, and biota. For the foreseeable future, subsequent sampling and analysis

  19. Deepwater Horizon Study Group Working Paper January 2011

    E-Print Network [OSTI]

    Silver, Whendee

    is considered a secondary response countermeasure following mechanical recovery. Due to limitations in oil recovery technology during a spill of significant volume, chemical dispersants, a secondary response tool, are used when an oil slick poses

  20. ORISE: DeepwaterHorizon and Nuclear & Radiological Incidents

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible for Renewable Energy:Nanowire3627 FederalTransformers1 DIRECTORJoethe

  1. ORISE: White paper analyzes Deepwater Horizon event for improving nuclear

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)Integrated CodesTransparencyDOENurseResourcesThe Value The U.S. Department

  2. HORIZON SENSING

    SciTech Connect (OSTI)

    Larry G. Stolarczyk

    2003-03-18T23:59:59.000Z

    With the aid of a DOE grant (No. DE-FC26-01NT41050), Stolar Research Corporation (Stolar) developed the Horizon Sensor (HS) to distinguish between the different layers of a coal seam. Mounted on mining machine cutter drums, HS units can detect or sense the horizon between the coal seam and the roof and floor rock, providing the opportunity to accurately mine the section of the seam most desired. HS also enables accurate cutting of minimum height if that is the operator's objective. Often when cutting is done out-of-seam, the head-positioning function facilitates a fixed mining height to minimize dilution. With this technology, miners can still be at a remote location, yet cut only the clean coal, resulting in a much more efficient overall process. The objectives of this project were to demonstrate the feasibility of horizon sensing on mining machines and demonstrate that Horizon Sensing can allow coal to be cut cleaner and more efficiently. Stolar's primary goal was to develop the Horizon Sensor (HS) into an enabling technology for full or partial automation or ''agile mining''. This technical innovation (R&D 100 Award Winner) is quickly demonstrating improvements in productivity and miner safety at several prominent coal mines in the United States. In addition, the HS system can enable the cutting of cleaner coal. Stolar has driven the HS program on the philosophy that cutting cleaner coal means burning cleaner coal. The sensor, located inches from the cutting bits, is based upon the physics principles of a Resonant Microstrip Patch Antenna (RMPA). When it is in proximity of the rock-coal interface, the RMPA impedance varies depending on the thickness of uncut coal. The impedance is measured by the computer-controlled electronics and then sent by radio waves to the mining machine. The worker at the machine can read the data via a Graphical User Interface, displaying a color-coded image of the coal being cut, and direct the machine appropriately. The Horizon Sensor program began development in 1998 and experienced three major design phases. The final version, termed HS-3, was commissioned in 2000 with the assistance of the DOE-Mining Industry of the Future program, commercialized in 2002, and has been used 14 times in 12 different mines within the United States. The Horizon Sensor has applications in both underground and surface mining operations. This technology is primarily used in the coal industry, but is also used to mine trona and potash. All horizon sensor components have Mine Safety and Health Administration (MSHA) (United States) and IEC (International) certification. Horizon Sensing saves energy by maximizing cutting efficiency, cutting only desired material. This desired material is cleaner fuel, therefore reducing pollutants to the atmosphere when burned and burning more efficiently. Extracting only desired material increases productivity by reducing or eliminating the cleaning step after extraction. Additionally, this technology allows for deeper mining, resulting in more material gained from one location. The remote sensing tool allows workers to operate the machinery away from the hazards of cutting coal, including noise, breathing dust and gases, and coal and rock splintering and outbursts. The HS program has primarily revolved around the development of the technology. However, the end goal of the program has always been the commercialization of the technology and only within the last 2 years of the program has this goal been realized. Real-time horizon sensing on mining machines is becoming an industry tool. Detailed monitoring of system function, user experience, and mining benefits is ongoing.

  3. Ultra-Deepwater Production Systems

    SciTech Connect (OSTI)

    Ken L. Smith; Marc E. Leveque

    2005-05-31T23:59:59.000Z

    The report herein is a summary of the work performed on three projects to demonstrate hydrocarbon drilling and production methods applicable to deep and ultra deepwater field developments in the Gulf of Mexico and other like applications around the world. This work advances technology that could lead to more economic development and exploitation of reserves in ultra-deep water or remote areas. The first project is Subsea Processing. Its scope includes a review of the ''state of the art'' in subsea components to enable primary production process functions such as first stage liquids and gas separation, flow boosting, chemical treatment, flow metering, etc. These components are then combined to allow for the elimination of costly surface production facilities at the well site. A number of studies were then performed on proposed field development projects to validate the economic potential of this technology. The second project involved the design and testing of a light weight production riser made of composite material. The proposed design was to meet an actual Gulf of Mexico deepwater development project. The various engineering and testing work is reviewed, including test results. The third project described in this report encompasses the development and testing of a close tolerance liner drilling system, a new technology aimed at reducing deepwater drilling costs. The design and prototype testing in a test well are described in detail.

  4. RESEARCH ARTICLE Open Access RNA-Seq reveals complex genetic response to

    E-Print Network [OSTI]

    Whitehead, Andrew

    the blowout of the Deepwater Horizon (DH) drilling platform was one of the largest in history discharging more expression in the salt marsh minnow Fundulus grandis, which is local to the northern coast of the Gulf In April of 2010, the explosion of the Deepwater Hori- zon oil drilling platform initiated the largest deep

  5. Ultra-Deepwater Production Systems

    SciTech Connect (OSTI)

    K. L. Smith; M. E. Leveque

    2004-09-30T23:59:59.000Z

    This report includes technical progress made during the period October, 2003 through September, 2004. At the end of the last technical progress report, the subsea processing aspects of the work program had been dropped due to the lack of commercial opportunity within ConocoPhillips, and the program had been redirected towards two other promising deepwater technologies: the development and demonstration of a composite production riser, and the development and testing of a close-tolerance liner drilling system. This report focuses on these two technologies.

  6. ULTRA-DEEPWATER ADVISORY COMMITTEE

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof Energy 2, 2015 -Helicopter AccidentSeptember 2009 UDAC MeetingULTRA-DEEPWATER

  7. Oyo-first field Deepwater Nigeria?

    SciTech Connect (OSTI)

    Lilletveit, R.; Nelson, L. [The Statoil and BP Alliance, Stavanger (Norway); Osahon, G. [Allied Energy Resources (Nig) Ltd., Lagos (Nigeria)

    1996-08-01T23:59:59.000Z

    The Oyo-1 well was drilled in 3Q95 in OPL 210. The partners in the block are Allied Energy (Operator) and the Statoil and BP Alliance. This well was the first well drilled in Deepwater Nigeria and is a reported hydrocarbon discovery. Although the well was within the Niger Delta depositional system, the deepwater play types drilled were quite different than anything previously tested on the Nigerian shelf or onshore. One year on, some of the questions to be asked are: (1) What did Oyo-1 discover? (2) What has been done to establish the commerciality, or otherwise, of the hydrocarbon pools encountered? (3) What impact does this discovery have on other prospects identified in the deepwater area? The answer to these questions will help to identify whether a new hydrocarbon province in the deepwater Nigeria area can be developed, or not.

  8. Limitations of extended reach drilling in deepwater

    E-Print Network [OSTI]

    Akinfenwa, Akinwunmi Adebayo

    2000-01-01T23:59:59.000Z

    As the worldwide search for hydrocarbons continues into the deepwater of the oceans, drilling extended reach wells have helped to drain the fields in the most cost effective way, thus providing the oil and gas industry the cushion to cope...

  9. A Simplified Solution For Gas Flow During a Blow-out in an H2 or Air Storage Cavern

    E-Print Network [OSTI]

    Boyer, Edmond

    A Simplified Solution For Gas Flow During a Blow-out in an H2 or Air Storage Cavern Pierre Bérest, Milano, Italy Abstract A small number of blow-outs from gas storage caverns (for example, in Moss Bluff and hydrogen storage in salt caverns. Compressed Air Energy Storage (CAES) is experiencing a rise in interest

  10. Non-normal parameter blowout bifurcation: an example in a truncated mean field dynamo model

    E-Print Network [OSTI]

    Eurico Covas; Peter Ashwin; Reza Tavakol

    1997-09-08T23:59:59.000Z

    We examine global dynamics and bifurcations occurring in a truncated model of a stellar mean field dynamo. This model has symmetry-forced invariant subspaces for the dynamics and we find examples of transient type I intermittency and blowout bifurcations to transient on-off intermittency, involving laminar phases in the invariant submanifold. In particular, our model provides examples of blowout bifurcations that occur on varying a non-normal parameter; that is, the parameter varies the dynamics within the invariant subspace at the same time as the dynamics normal to it. As a consequence of this we find that the Lyapunov exponents do not vary smoothly and the blowout bifurcation occurs over a range of parameter values rather than a point in the parameter space.

  11. Environmental disaster or just a drop in the bucket: Texas scientists on the real effects of the Deewater Horizon oil spill 

    E-Print Network [OSTI]

    Lee, Leslie

    2011-01-01T23:59:59.000Z

    Winter 2011 tx H2O 3 or just a drop in thebucket?Texas scientists on the real e#31;ects of the Deepwater Horizon oil spill 4 tx H2O Winter 2011 Environmental Disaster Continued What if gasoline pumped into cars, seafood eaten at restaurants... but forgo#27;en as the wreckage of the Deepwater Horizon MC#31;#30;#31; drilling platform sank into its waters. A crude awakening Like any large oil spill, this one took its toll in many ways. Eleven BP employees on the rig died in the explosion...

  12. Scanning the Conservation Horizon

    E-Print Network [OSTI]

    Scanning the Conservation Horizon A Guide to Climate Change Vulnerability Assessment #12;Scanning.A. Stein, and N.A. Edelson, editors. 2011. Scanning the Conservation Horizon: A Guide to Climate Change.S. Geological Survey Fundamental Science Practices. Scanning the Conservation Horizon is available online at

  13. Horizon Health EAP Services

    E-Print Network [OSTI]

    Yates, Andrew

    /09) HorizonCareLinkSM ­ All the help you need online Horizon Health EAP also provides services through counselors- Child care or elder care services- Pet care and veterinarians- Adoption resources- Health clubsHorizon Health EAP Services Employee Assistance Program with Telephone and 3 Face

  14. Mechanics of Isolated Horizons

    E-Print Network [OSTI]

    Abhay Ashtekar; Christopher Beetle; Stephen Fairhurst

    1999-11-04T23:59:59.000Z

    A set of boundary conditions defining an undistorted, non-rotating isolated horizon are specified in general relativity. A space-time representing a black hole which is itself in equilibrium but whose exterior contains radiation admits such a horizon. However, the definition is applicable in a more general context, such as cosmological horizons. Physically motivated, (quasi-)local definitions of the mass and surface gravity of an isolated horizon are introduced and their properties analyzed. Although their definitions do not refer to infinity, these quantities assume their standard values in the static black hole solutions. Finally, using these definitions, the zeroth and first laws of black hole mechanics are established for isolated horizons.

  15. DOE Announces New Research to Advance Safe and Responsible Deepwater...

    Energy Savers [EERE]

    Recipient share: 935,000; Duration: 1 years Doris, Inc. (Houston, Texas) -- Low Cost Flexible Production System for Remote Ultra-Deepwater Gulf of Mexico Field...

  16. Niger delta deepwater region petroleum potential assessment

    SciTech Connect (OSTI)

    Thomas, D. [Thomas and Associates, Hastings (United Kingdom)

    1995-12-18T23:59:59.000Z

    On behalf of the Nigerian Ministry of Petroleum and Natural Resources some 23,000 km of high quality 192 channel, 96 fold seismic, and associated gravity and magnetic data were acquired by TGSI-Mabon Geophysical Co. and made available to the industry in 1991. These data were collected over all deepwater blocks in conjunction with the planned 1993 license round. Later, during 1993 and 1994 TGSI with Mabon Ltd. and Stratum Petroleum Services extended the program onto the shelf (7,000 km) and into the ultra deepwater areas (6,400 km), making possible modern studies of the entire offshore delta complex. In assessing the petroleum potential of an undrilled region, it is useful to refer to analogous basins or provinces already with histories of hydrocarbon exploration and discovery. With this in mind, and using limited data from the already drilled areas of Nigeria offshore, the adjacent West Africa salt basin and Brazil in particular, an attempt is made to discuss the hydrocarbon habitat of the undrilled Niger delta deepwater offshore sedimentary sequences.

  17. 6/10/12 The use of acoustic inversion to estimate the bubble size distribution in pipelines | Global Scientia 1/2globalscientia.com/article/.../use-acoustic-inversion-estimate-bubble-size-distribution-pipelines

    E-Print Network [OSTI]

    Sóbester, András

    to expand and causes 'blow out'. A blow out is the sudden release of oil and/or gas from a well and issues with the blow out preventer were key in Deepwater Horizon oil spill (also known as the Macondo blowout) in the Gulf of Mexico in 2010. Currently, the most popular technique for estimating the gas bubble size

  18. The Oil Debacle in the Gulf of Mexico: An Alternative to the Coming Flood of Offshore Regulations 

    E-Print Network [OSTI]

    Griffin, James M.

    2010-01-01T23:59:59.000Z

    been more than 36,000 oil wells drilled in the Gulf. Yet since exploration in the Gulf of Mexico began in the 1950’s, there has been only one accident to compare with BP’s ill-fated Deepwater Horizon. After the blowout of the PEMEX IXTOC I well...

  19. 3-D visualisation and interpretation of seismic attributes extracted from large 3-D seismic datasets: Subregional and prospect evaluation, deepwater Nigeria

    SciTech Connect (OSTI)

    Sola, M.; Haakon Nordby, L.; Dailey, D.V.; Duncan, E.A. [BP and Statoil Alliance, Stavanger (Norway)

    1996-12-31T23:59:59.000Z

    High resolution 3-D visualization of horizon interpretation and seismic attributes from large 3-D seismic surveys in deepwater Nigeria has greatly enhanced the exploration team`s ability to quickly recognize prospective segments of subregional and prospect specific scale areas. Integrated workstation generated structure, isopach and extracted horizon consistent, interval and windowed attributes are particularly useful in illustrating the complex structural and stratigraphical prospectivity of deepwater Nigeria. Large 3-D seismic volumes acquired over 750 square kilometers can be manipulated within the visualization system with attribute tracking capability that allows for real time data interrogation and interpretation. As in classical seismic stratigraphic studies, pattern recognition is fundamental to effective depositions facies interpretation and reservoir model construction. The 3-D perspective enhances the data interpretation through clear representation of relative scale, spatial distribution and magnitude of attributes. In deepwater Nigeria, many prospective traps rely on an interplay between syndepositional structure and slope turbidite depositional systems. Reservoir systems in many prospects appear to be dominated by unconfined to moderately focused slope feeder channel facies. These units have spatially complex facies architecture with feeder channel axes separated by extensive interchannel areas. Structural culminations generally have a history of initial compressional folding with late in extensional collapse and accommodation faulting. The resulting complex trap configurations often have stacked reservoirs over intervals as thick as 1500 meters. Exploration, appraisal and development scenarios in these settings can be optimized by taking full advantage of integrating high resolution 3-D visualization and seismic workstation interpretation.

  20. 3-D visualisation and interpretation of seismic attributes extracted from large 3-D seismic datasets: Subregional and prospect evaluation, deepwater Nigeria

    SciTech Connect (OSTI)

    Sola, M.; Haakon Nordby, L.; Dailey, D.V.; Duncan, E.A. (BP and Statoil Alliance, Stavanger (Norway))

    1996-01-01T23:59:59.000Z

    High resolution 3-D visualization of horizon interpretation and seismic attributes from large 3-D seismic surveys in deepwater Nigeria has greatly enhanced the exploration team's ability to quickly recognize prospective segments of subregional and prospect specific scale areas. Integrated workstation generated structure, isopach and extracted horizon consistent, interval and windowed attributes are particularly useful in illustrating the complex structural and stratigraphical prospectivity of deepwater Nigeria. Large 3-D seismic volumes acquired over 750 square kilometers can be manipulated within the visualization system with attribute tracking capability that allows for real time data interrogation and interpretation. As in classical seismic stratigraphic studies, pattern recognition is fundamental to effective depositions facies interpretation and reservoir model construction. The 3-D perspective enhances the data interpretation through clear representation of relative scale, spatial distribution and magnitude of attributes. In deepwater Nigeria, many prospective traps rely on an interplay between syndepositional structure and slope turbidite depositional systems. Reservoir systems in many prospects appear to be dominated by unconfined to moderately focused slope feeder channel facies. These units have spatially complex facies architecture with feeder channel axes separated by extensive interchannel areas. Structural culminations generally have a history of initial compressional folding with late in extensional collapse and accommodation faulting. The resulting complex trap configurations often have stacked reservoirs over intervals as thick as 1500 meters. Exploration, appraisal and development scenarios in these settings can be optimized by taking full advantage of integrating high resolution 3-D visualization and seismic workstation interpretation.

  1. Deepwater_Response.pdf | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't Your Destiny:Revised Finding of No53197 This workDayton: ENERGY8DecommissioningFuelDeepwater

  2. Online Horizon Selection in Receding Horizon Temporal Logic Planning

    E-Print Network [OSTI]

    Murray, Richard M.

    - ative, short horizon solutions, using the currently observed state to compute a control strategy synthesis for temporal logic, but have thus far been limited by pursuing a single sequence of short horizon problems to the current goal. We propose a receding horizon algorithm for reactive synthesis that au

  3. P h y s i c a l O c e a n o g r a p h y D i v i s i o n Monitoring of the Gulf of Mexico Conditions during the Deepwater

    E-Print Network [OSTI]

    to the ocean conditions during the oil spill. Upper left: Altimetry-derived Gulf of Mexico surface currentsP h y s i c a l O c e a n o g r a p h y D i v i s i o n Monitoring of the Gulf of Mexico Conditions during the Deepwater Horizon Oil Spill An AOML - wide effort As part of NOAA's mission to study the role

  4. P h y s i c a l O c e a n o g r a p h y D i v i s i o n Monitoring the Gulf of Mexico Conditions during the Deepwater

    E-Print Network [OSTI]

    P h y s i c a l O c e a n o g r a p h y D i v i s i o n Monitoring the Gulf of Mexico Conditions during the Deepwater Horizon Oil Spill An AOML - wide effort As part of NOAA's mission to study the role research cruises focused on assessing the extent of the spill in the greater Gulf of Mexico

  5. Investors' horizon and stock prices

    E-Print Network [OSTI]

    Parsa, Sahar

    2011-01-01T23:59:59.000Z

    This dissertation consists of three essays on the relation between investors' trading horizon and stock prices. The first chapter explores the theoretical relation between the horizon of traders and the negative externality ...

  6. Spacetimes containing slowly evolving horizons

    E-Print Network [OSTI]

    W. Kavanagh; I. Booth

    2006-08-29T23:59:59.000Z

    Slowly evolving horizons are trapping horizons that are "almost" isolated horizons. This paper reviews their definition and discusses several spacetimes containing such structures. These include certain Vaidya and Tolman-Bondi solutions as well as (perturbatively) tidally distorted black holes. Taking into account the associated mass scales, they also suggest that slowly evolving horizons are the norm rather than the exception in astrophysical processes that involve stellar-scale black holes.

  7. Effects of Various Blowout Panel Configurations on the Structural Response of LANL Building 16-340 to Internal Explosions

    SciTech Connect (OSTI)

    Jason P. Wilke

    2005-09-30T23:59:59.000Z

    The risk of accidental detonation is present whenever any type of high explosives processing activity is performed. These activities are typically carried out indoors to protect processing equipment from the weather and to hide possibly secret processes from view. Often, highly strengthened reinforced concrete buildings are employed to house these activities. These buildings may incorporate several design features, including the use of lightweight frangible blowout panels, to help mitigate blast effects. These panels are used to construct walls that are durable enough to withstand the weather, but are of minimal weight to provide overpressure relief by quickly moving outwards and creating a vent area during an accidental explosion. In this study the behavior of blowout panels under various blast loading conditions was examined. External loadings from explosions occurring in nearby rooms were of primary interest. Several reinforcement systems were designed to help blowout panels resist failure from external blast loads while still allowing them to function as vents when subjected to internal explosions. The reinforcements were studied using two analytical techniques, yield-line analysis and modal analysis, and the hydrocode AUTODYN. A blowout panel reinforcement design was created that could prevent panels from being blown inward by external explosions. This design was found to increase the internal loading of the building by 20%, as compared with nonreinforced panels. Nonreinforced panels were found to increase the structural loads by 80% when compared to an open wall at the panel location.

  8. FEBRUARY 14, 2011 NOAA Ship Thomas Jefferson approaches the Deepwater Horizon

    E-Print Network [OSTI]

    the successful implementation of NOAA's satellite program. Energy is everyone's business. Solar, wind, and wave that all offshore uses ­ include renewable energ

  9. New insights into microbial responses to oil spills from the Deepwater Horizon incident

    E-Print Network [OSTI]

    Mason, O.U.

    2012-01-01T23:59:59.000Z

    carbon cycle with a gas hydrate capacitor: Significance formaximum. Natural Gas Hydrates, Occurrence, Distribution and

  10. DeepwaterHorizonOilSpill DraftPhaseIIEarlyRestorationPlan

    E-Print Network [OSTI]

    panhandle to west of Galveston Island, Texas. At the height of the spill, approximately 37% of the open of Texas (Texas Commission on Environmental Quality; Texas General Land Office; Texas Parks and Wildlife

  11. Deepwater Horizon crude oil impacts the developing hearts of large predatory pelagic fish

    E-Print Network [OSTI]

    Grosell, Martin

    . Cardiac function is particularly important for fast-swimming pelagic predators with high aerobic demand, indicating a highly con- served response to oil toxicity. A considerable portion of Gulf wa- ter samples (1). Although subsurface application of dispersant near the wellhead resulted in retention

  12. Microbial gene functions enriched in the Deepwater Horizon deep-sea oil plume

    E-Print Network [OSTI]

    Lu, Z.

    2012-01-01T23:59:59.000Z

    subsurface and the origin of heavy oil. Nature 426: 344-352.2007). Effects of heavy fuel oil on the bacterial community

  13. New insights into microbial responses to oil spills from the Deepwater Horizon incident

    E-Print Network [OSTI]

    Mason, O.U.

    2012-01-01T23:59:59.000Z

    water samples exceeded the EPA’s aquatic life benchmarks for polycyclic aromatic hydrocarbons (PAHs) (

  14. OFFICE OF RESPONSE AND RESTORATION ! EMERGENCY RESPONSE DIVISION Deepwater Horizon Oil

    E-Print Network [OSTI]

    generally because it is relatively much lower in polyaromatic hydrocarbons (PAHs). PAHs are highly toxic reaches the surface and spreads out across the water, its lighter components, including VOCs, soon, or rainbow-colored. MS252 oil will also mix with water to form a sticky, pudding-like water-in-oil emulsion

  15. nh Gi Thit Hi Ti Nguyn Thin Nhin Do S C Trn Du Deepwater Horizon

    E-Print Network [OSTI]

    DÁnQunHtWakulla D Tho Phc Hi Sm Giai on III MÔ T D ÁN CHI PHÍ C LNG Ban Qun Tr ánh Giá Thit Hi Tài Nguyên Thiên. Chiu dài c c lng cho bãi bin này là mt dm vi din tích khong 4,5 acre. xut d án ci thin Công Viên

  16. nh Gi Thit Hi Ti Nguyn Thin Nhin Do S C Trn Du Deepwater Horizon

    E-Print Network [OSTI]

    . xut D Án Phc Hi Cu Bn Bob Sikes, Bãi u Xe, và ng Mòn s lp thêm èn chiu sáng dùng nng lng mt tri, sa · Texas NOAA · B Ni V · Cc Bo V Môi Trng Hoa K · B Nông Nghip Hoa K #12;CHI PHÍ C LNG D án Phc Hi n Cát

  17. New insights into microbial responses to oil spills from the Deepwater Horizon incident

    E-Print Network [OSTI]

    Mason, O.U.

    2012-01-01T23:59:59.000Z

    C. J. Villanueva (2010). "Propane respiration jump-startsin samples that exhibited propane and ethane anomalies (loss of both ethane and propane relative to methane

  18. Evaluacin de Daos en Recursos Naturales por el Derrame de Petrleo de Deepwater Horizon

    E-Print Network [OSTI]

    recolección de cloacas de la Autoridad de Servicios Públicos de la Costa Esmeralda (ECUA). El proyecto

  19. DR. DONALD BOESCH NATIONAL COMMISSION ON THE BP DEEPWATER HORIZON OIL SPILL AND

    E-Print Network [OSTI]

    's ability to respond to spills, and to recommend reforms to make offshore energy production safer, as the rig's crew completed drilling the exploratory Macondo well deep under the waters of the Gulf of Mexico energy exploration and production, particularly at the frontiers of experience, involve risks for which

  20. Microbial gene functions enriched in the Deepwater Horizon deep-sea oil plume

    E-Print Network [OSTI]

    Lu, Z.

    2012-01-01T23:59:59.000Z

    to 15 detected in the non-oil contaminated samples. The alkBappeared to be dominant in all oil plume samples (Fig. S2).signal intensities. All oil plume samples clustered together

  1. New insights into microbial responses to oil spills from the Deepwater Horizon incident

    E-Print Network [OSTI]

    Mason, O.U.

    2012-01-01T23:59:59.000Z

    sea in the Gulf of Mexico to oil emanating from the MacondoPhotos of the oil spill from the Gulf of Mexico. Figure 3.Gulf of Mexico experiences multiple, natural, episodic “oil

  2. RNA-Seq reveals complex genetic response to deepwater horizon oil release in Fundulus grandis

    E-Print Network [OSTI]

    Garcia, Tzintzuni I; Shen, Yingjia; Crawford, Douglas; Oleksiak, Marjorie F; Whitehead, Andrew; Walter, Ronald B

    2012-01-01T23:59:59.000Z

    Fishes to the Gulf of Mexico Oil Disaster. PLoS One 2011, 6:of weathered crude oil from the Gulf of Mexico in mallardsmall oil seeps occur through- out the Gulf of Mexico, we do

  3. Tracking Oil from the Deepwater Horizon Oil Spill in Barataria Bay Sediments

    E-Print Network [OSTI]

    Dincer, Zeynep

    2013-05-03T23:59:59.000Z

    of MASTER OF SCIENCE Approved by: Chair of Committee, Franco Marcantonio Co-Chair of Committee, Jos? L. Sericano Committee Members, Terry L. Wade Thomas S. Bianchi Head of Department, John R. Giardino May 2013 Major Subject: Geology... Island (Landau, 2011). The DWH oil spill is not the first oil spill in GoM. In June 1979, Ixtoc I platform was blown out in the Bay of Campeche, Mexico released 140 million gallons of oil into to the GoM (Etkin, 2009). Besides these large oil spills...

  4. RNA-Seq reveals complex genetic response to deepwater horizon oil release in Fundulus grandis

    E-Print Network [OSTI]

    Garcia, Tzintzuni I; Shen, Yingjia; Crawford, Douglas; Oleksiak, Marjorie F; Whitehead, Andrew; Walter, Ronald B

    2012-01-01T23:59:59.000Z

    from GenBank Feb 17, 2011) using the Bowtie short readaligner [29] (Bowtie version 0.12.7). The resulting1471-2164/13/474 We used Bowtie to map the full set of

  5. Tracking Oil from the Deepwater Horizon Oil Spill in Barataria Bay Sediments 

    E-Print Network [OSTI]

    Dincer, Zeynep

    2013-05-03T23:59:59.000Z

    A. These values show decreasing ....... 113 Figure 8. PAH distribution of reference oil and samples A (0-1 cm), A (4-5 cm), G (0-1 cm) and H1 (0-2 cm). PAH fingerprints represent naphthalene, fluorene, phenanthrene...; Wang et al., 2006). Besides having source-specific information, biomarkers are one of the most degradation-resistant chemical compounds in oil. Wang et al. (1994) shows that triterpanes and steranes, still present in intertidal sediment samples from...

  6. DID YOU KNOW Facts about NOAA and its Deepwater Horizon Oil Spill Response Capabilities

    E-Print Network [OSTI]

    and livelihoods. ... NOAA's Satellite Analysis Branch has provided "shapefiles" depicting the location of spilled

  7. The Temperature Prediction in Deepwater Drilling of Vertical Well

    E-Print Network [OSTI]

    Feng, Ming

    2012-07-16T23:59:59.000Z

    The extreme operating conditions in deepwater drilling lead to serious relative problems. The knowledge of subsea temperatures is of prime interest to petroleum engineers and geo-technologists alike. Petroleum engineers are interested in subsea...

  8. Regional distribution of diagenetic carbonate cement in Palaeocene deepwater

    E-Print Network [OSTI]

    Haszeldine, Stuart

    Regional distribution of diagenetic carbonate cement in Palaeocene deepwater sandstones: North Sea. This study attempts to make a large-scale regional examination of the distribution of carbonate cements

  9. Computational Intelligence for Deepwater Reservoir Depositional Environments Interpretation

    E-Print Network [OSTI]

    Yu, Tina; Clark, Julian; Sullivan, Morgan; 10.1016/j.jngse.2011.07.014

    2013-01-01T23:59:59.000Z

    Predicting oil recovery efficiency of a deepwater reservoir is a challenging task. One approach to characterize a deepwater reservoir and to predict its producibility is by analyzing its depositional information. This research proposes a deposition-based stratigraphic interpretation framework for deepwater reservoir characterization. In this framework, one critical task is the identification and labeling of the stratigraphic components in the reservoir, according to their depositional environments. This interpretation process is labor intensive and can produce different results depending on the stratigrapher who performs the analysis. To relieve stratigrapher's workload and to produce more consistent results, we have developed a novel methodology to automate this process using various computational intelligence techniques. Using a well log data set, we demonstrate that the developed methodology and the designed workflow can produce finite state transducer models that interpret deepwater reservoir depositional...

  10. Are subsurface safety valves needed in deepwater?

    SciTech Connect (OSTI)

    Verret, A.; Hey, C.

    1995-11-01T23:59:59.000Z

    The object of this study was to evaluate SCSSV reliability and identify a preferred configuration for subsea completions in deepwater. A system design consisting of subsea, conventional, dual-bore tree, cluster wells was selected for evaluation. The study examined inherent risks associated with six tubing retrievable SCSSV configurations. Risks were evaluated for personnel and environmental safety, and operational and financial impact of: No SCSSV; Single SCSSV; Dual operating system single SCSSV; Tandem hot/hot (both valves active) SCSSVs without lockout features; Tandem hot/hot SCSSVs with lockout features; Tandem hot/cold (one valve active, the other dormant in open position) SCSSVs with lockout features. A ``fault tree`` identifying events that could lead to deleterious incidents was used to evaluate risks. Costs and consequences associated with potential events were determined using existing industry data, and resulting calculated risks were evaluated. Recommendations were developed and compared to current regulations, and potential regulatory conflicts were identified.

  11. Well blowout rates and consequences in California Oil and Gas District 4 from 1991 to 2005: Implications for geological storage of carbon dioxide

    E-Print Network [OSTI]

    Jordan, Preston D.

    2008-01-01T23:59:59.000Z

    pub/oil/ Data_Catalog/Oil_and_Gas/Oil_?elds/CA_oil?elds.DAT.1993) A history of oil- and gas-well blowouts in California,Health Administration (2007), Oil and gas well drilling and

  12. Well blowout rates and consequences in California Oil and Gas District 4 from 1991 to 2005: Implications for geological storage of carbon dioxide

    E-Print Network [OSTI]

    Jordan, Preston D.

    2008-01-01T23:59:59.000Z

    abandoned or idle/shut-in at this time, and the reservoirabandoned-well blowout rate was not calculated on a ?uid volume basis, because estimates of the in-reservoir ?

  13. 2008 Annual Plan for the Ultra-Deepwater and Unconventional Natural...

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

    8 Annual Plan for the Ultra-Deepwater and Unconventional Natural Gas and Other Petroleum Resources Research and Development Program 2008 Annual Plan for the Ultra-Deepwater and...

  14. 2007 Annual Plan for the Ultra-Deepwater and Unconventional Natural...

    Energy Savers [EERE]

    07 Annual Plan for the Ultra-Deepwater and Unconventional Natural Gas and Other Petroleum Resources Research and Development Program 2007 Annual Plan for the Ultra-Deepwater and...

  15. Entropy of Isolated Horizons revisited

    E-Print Network [OSTI]

    Rudranil Basu; Romesh K. Kaul; Parthasarathi Majumdar

    2009-07-29T23:59:59.000Z

    The decade-old formulation of the isolated horizon classically and within loop quantum gravity, and the extraction of the microcanonical entropy of such a horizon from this formulation, is reviewed, in view of recent renewed interest. There are two main approaches to this problem: one employs an SU(2) Chern-Simons theory describing the isolated horizon degrees of freedom, while the other uses a reduced U(1) Chern-Simons theory obtained from the SU(2) theory, with appropriate constraints imposed on the spectrum of boundary states `living' on the horizon. It is shown that both these ways lead to the same infinite series asymptotic in horizon area for the microcanonical entropy of an isolated horizon. The leading area term is followed by an unambiguous correction term logarithmic in area with a coefficient $-\\frac32$, with subleading corrections dropping off as inverse powers of the area.

  16. Entropy of isolated horizons revisited

    SciTech Connect (OSTI)

    Basu, Rudranil; Kaul, Romesh K.; Majumdar, Parthasarathi [SN Bose National Centre for Basic Sciences, Kolkata 700 098 (India); Institute of Mathematical Sciences, Chennai 600 113 (India); Saha Institute of Nuclear Physics, Kolkata 700 064 (India)

    2010-07-15T23:59:59.000Z

    The decade-old formulation of the isolated horizon classically and within loop quantum gravity, and the extraction of the microcanonical entropy of such a horizon from this formulation, is reviewed, in view of recent renewed interest. There are two main approaches to this problem: one employs an SU(2) Chern-Simons theory describing the isolated horizon degrees of freedom, while the other uses a reduced U(1) Chern-Simons theory obtained from the SU(2) theory, with appropriate constraints imposed on the spectrum of boundary states ''living'' on the horizon. It is shown that both these ways lead to the same infinite series asymptotic in the horizon area for the microcanonical entropy of an isolated horizon. The leading area term is followed by an unambiguous correction term logarithmic in area with a coefficient -(3/2), with subleading corrections dropping off as inverse powers of the area.

  17. The New Horizons Spacecraft

    E-Print Network [OSTI]

    Fountain, Glen H; Hersman, Christopher B; Herder, Timothy S; Coughlin, Thomas B; Gibson, William C; Clancy, Deborah A; DeBoy, Christopher C; Hill, T Adrian; Kinnison, James D; Mehoke, Douglas S; Ottman, Geffrey K; Rogers, Gabe D; Stern, S Alan; Stratton, James M; Vernon, Steven R; Williams, Stephen P

    2007-01-01T23:59:59.000Z

    The New Horizons spacecraft was launched on 19 January 2006. The spacecraft was designed to provide a platform for seven instruments that will collect and return data from Pluto in 2015. The design drew on heritage from previous missions developed at The Johns Hopkins University Applied Physics Laboratory (APL) and other missions such as Ulysses. The trajectory design imposed constraints on mass and structural strength to meet the high launch acceleration needed to reach the Pluto system prior to the year 2020. The spacecraft subsystems were designed to meet tight mass and power allocations, yet provide the necessary control and data handling finesse to support data collection and return when the one-way light time during the Pluto flyby is 4.5 hours. Missions to the outer solar system require a radioisotope thermoelectric generator (RTG) to supply electrical power, and a single RTG is used by New Horizons. To accommodate this constraint, the spacecraft electronics were designed to operate on less than 200 W....

  18. The New Horizons Spacecraft

    E-Print Network [OSTI]

    Glen H. Fountain; David Y. Kusnierkiewicz; Christopher B. Hersman; Timothy S. Herder; Thomas B. Coughlin; William C. Gibson; Deborah A. Clancy; Christopher C. DeBoy; T. Adrian Hill; James D. Kinnison; Douglas S. Mehoke; Geffrey K. Ottman; Gabe D. Rogers; S. Alan Stern; James M. Stratton; Steven R. Vernon; Stephen P. Williams

    2007-09-26T23:59:59.000Z

    The New Horizons spacecraft was launched on 19 January 2006. The spacecraft was designed to provide a platform for seven instruments that will collect and return data from Pluto in 2015. The design drew on heritage from previous missions developed at The Johns Hopkins University Applied Physics Laboratory (APL) and other missions such as Ulysses. The trajectory design imposed constraints on mass and structural strength to meet the high launch acceleration needed to reach the Pluto system prior to the year 2020. The spacecraft subsystems were designed to meet tight mass and power allocations, yet provide the necessary control and data handling finesse to support data collection and return when the one-way light time during the Pluto flyby is 4.5 hours. Missions to the outer solar system require a radioisotope thermoelectric generator (RTG) to supply electrical power, and a single RTG is used by New Horizons. To accommodate this constraint, the spacecraft electronics were designed to operate on less than 200 W. The spacecraft system architecture provides sufficient redundancy to provide a probability of mission success of greater than 0.85, even with a mission duration of over 10 years. The spacecraft is now on its way to Pluto, with an arrival date of 14 July 2015. Initial inflight tests have verified that the spacecraft will meet the design requirements.

  19. Near Horizon Structure of Extremal Vanishing Horizon Black Holes

    E-Print Network [OSTI]

    Sadeghian, S; Vahidinia, M H; Yavartanoo, H

    2015-01-01T23:59:59.000Z

    We study the near horizon structure of Extremal Vanishing Horizon (EVH) black holes, extremal black holes with vanishing horizon area with a vanishing one-cycle on the horizon. We construct the most general near horizon EVH and near-EVH ansatz for the metric and other fields, like dilaton and gauge fields which may be present in the theory. We prove that (1) the near horizon EVH geometry for generic gravity theory in generic dimension has a three dimensional maximally symmetric subspace; (2) if the matter fields of the theory satisfy strong energy condition either this 3d part is AdS$_3$, or the solution is a direct product of a locally 3d flat space and a $d-3$ dimensional part; (3) these results extend to the near horizon geometry of near-EVH black holes, for which the AdS$_3$ part is replaced with BTZ geometry. We present some specific near horizon EVH geometries in 3, 4 and 5 dimensions for which there is a classification. We also briefly discuss implications of these generic results for generic (gauged) ...

  20. Mechanics of Rotating Isolated Horizons

    E-Print Network [OSTI]

    Abhay Ashtekar; Christopher Beetle; Jerzy Lewandowski

    2001-04-11T23:59:59.000Z

    Black hole mechanics was recently extended by replacing the more commonly used event horizons in stationary space-times with isolated horizons in more general space-times (which may admit radiation arbitrarily close to black holes). However, so far the detailed analysis has been restricted to non-rotating black holes (although it incorporated arbitrary distortion, as well as electromagnetic, Yang-Mills and dilatonic charges). We now fill this gap by first introducing the notion of isolated horizon angular momentum and then extending the first law to the rotating case.

  1. Acoustic horizons in nuclear fluids

    E-Print Network [OSTI]

    Niladri Sarkar; Abhik Basu; Jayanta K. Bhattacharjee; Arnab K. Ray

    2014-04-13T23:59:59.000Z

    We consider a hydrodynamic description of the spherically symmetric outward flow of nuclear matter, accommodating dispersion in it as a very weak effect. About the resulting stationary conditions in the flow, we apply an Eulerian scheme to derive a fully nonlinear equation of a time-dependent radial perturbation. In its linearized limit, with no dispersion, this equation implies the static acoustic horizon of an analogue gravity model. We, however, show that time-dependent nonlinear effects destabilize the static horizon. We also model the perturbation as a high-frequency travelling wave, and perform a {\\it WKB} analysis, in which the effect of weak dispersion is studied iteratively. We show that even arbitrarily small values of dispersion make the horizon fully opaque to any acoustic disturbance propagating against the bulk flow, with the amplitude and the energy flux of the radial perturbation undergoing a discontinuity at the horizon, and decaying exponentially just outside it.

  2. New Horizons for Hydrogen: Producing Hydrogen from Renewable Resources

    SciTech Connect (OSTI)

    Not Available

    2011-02-01T23:59:59.000Z

    Recent events have reminded us of the critical need to transition from crude oil, coal, and natural gas toward sustainable and domestic sources of energy. One reason is we need to strengthen our economy. In 2008 we saw the price of oil reach a record $93 per barrel. With higher oil prices, growing demand for gasoline, and increasing oil imports, an average of $235 billion per year, has left the United States economy to pay for foreign oil since 2005, or $1.2 trillion between 2005 and 2009. From a consumer perspective, this trend is seen with an average gasoline price of $2.50 per gallon since 2005, compared to an average of $1.60 between 1990 and 2004 (after adjusting for inflation). In addition to economic impacts, continued reliance on fossil fuels increases greenhouse gas emissions that may cause climate change, health impacts from air pollution, and the risk of disasters such as the Deepwater Horizon oil spill. Energy efficiency in the form of more efficient vehicles and buildings can help to reduce some of these impacts. However, over the long term we must shift from fossil resources to sustainable and renewable energy sources.

  3. Generic isolated horizons in loop quantum gravity

    E-Print Network [OSTI]

    Christopher Beetle; Jonathan Engle

    2010-07-16T23:59:59.000Z

    Isolated horizons model equilibrium states of classical black holes. A detailed quantization, starting from a classical phase space restricted to spherically symmetric horizons, exists in the literature and has since been extended to axisymmetry. This paper extends the quantum theory to horizons of arbitrary shape. Surprisingly, the Hilbert space obtained by quantizing the full phase space of \\textit{all} generic horizons with a fixed area is identical to that originally found in spherical symmetry. The entropy of a large horizon remains one quarter its area, with the Barbero-Immirzi parameter retaining its value from symmetric analyses. These results suggest a reinterpretation of the intrinsic quantum geometry of the horizon surface.

  4. Well blowout rates and consequences in California Oil and Gas District 4 from 1991 to 2005: Implications for geological storage of carbon dioxide

    SciTech Connect (OSTI)

    Jordan, Preston; Jordan, Preston D.; Benson, Sally M.

    2008-05-15T23:59:59.000Z

    Well blowout rates in oil fields undergoing thermally enhanced recovery (via steam injection) in California Oil and Gas District 4 from 1991 to 2005 were on the order of 1 per 1,000 well construction operations, 1 per 10,000 active wells per year, and 1 per 100,000 shut-in/idle and plugged/abandoned wells per year. This allows some initial inferences about leakage of CO2 via wells, which is considered perhaps the greatest leakage risk for geological storage of CO2. During the study period, 9% of the oil produced in the United States was from District 4, and 59% of this production was via thermally enhanced recovery. There was only one possible blowout from an unknown or poorly located well, despite over a century of well drilling and production activities in the district. The blowout rate declined dramatically during the study period, most likely as a result of increasing experience, improved technology, and/or changes in safety culture. If so, this decline indicates the blowout rate in CO2-storage fields can be significantly minimized both initially and with increasing experience over time. Comparable studies should be conducted in other areas. These studies would be particularly valuable in regions with CO2-enhanced oil recovery (EOR) and natural gas storage.

  5. Effects of Various Blowout Panel Configurations on the Structural Response of Los Alamos National Laboratory Building 16-340 to Internal Explosions

    SciTech Connect (OSTI)

    Jason P. Wilke

    2005-09-30T23:59:59.000Z

    The risk of accidental detonation is present whenever any type of high explosives processing activity is performed. These activities are typically carried out indoors to protect processing equipment from the weather and to hide possibly secret processes from view. Often, highly strengthened reinforced concrete buildings are employed to house these activities. These buildings may incorporate several design features, including the use of lightweight frangible blowout panels, to help mitigate blast effects. These panels are used to construct walls that are durable enough to withstand the weather, but are of minimal weight to provide overpressure relief by quickly moving outwards and creating a vent area during an accidental explosion. In this study the behavior of blowout panels under various blast loading conditions was examined. External loadings from explosions occurring in nearby rooms were of primary interest. Several reinforcement systems were designed to help blowout panels resist failure from external blast loads while still allowing them to function as vents when subjected to internal explosions. The reinforcements were studied using two analytical techniques, yield-line analysis and modal analysis, and the hydrocode AUTODYN. A blowout panel reinforcement design was created that could prevent panels from being blown inward by external explosions. This design was found to increase the internal loading of the building by 20%, as compared with nonreinforced panels. Nonreinforced panels were found to increase the structural loads by 80% when compared to an open wall at the panel location.

  6. NIF featured on BBC "Horizon"

    ScienceCinema (OSTI)

    Brian Cox

    2010-09-01T23:59:59.000Z

    The National Ignition Facility, the world's largest laser system, located at Lawrence Livermore National Laboratory, was featured in the BBC broadcast "Horizon" hosted by physicist Brian Cox. Here is the NIF portion of the program, which was entitled "Can We Make A Star On Earth?" This video is used with the express permission of the BBC.

  7. Observations and models of heat and salt transport at a deepwater Gulf of Mexico vent

    E-Print Network [OSTI]

    Yang, Zong-Liang

    Observations and models of heat and salt transport at a deepwater Gulf of Mexico vent Andrew Smith salinity and temperature anomalies at a deepwater Gulf of Mexico vent in lease blocks MC852/853. In our method for estimating gas and water flux from vents. Our model indicates that vents in the Gulf of Mexico

  8. High Mercury Concentrations Reflect Trophic Ecology of Three Deep-Water Chondrichthyans

    E-Print Network [OSTI]

    Newman, Michael C.

    High Mercury Concentrations Reflect Trophic Ecology of Three Deep-Water Chondrichthyans Michael C concentrations were explored for three deep-water chondrichthyans (Etmopterus princeps, Cen- troscymnus position in the trophic web (as indicated by differences in d15 N). Mercury is a major contaminant

  9. Kinematic and Mechanical Reconstruction of Walker Ridge Structures, Deepwater Gulf of Mexico

    E-Print Network [OSTI]

    Majekodunmi, Oluwatosin Eniola

    2011-02-22T23:59:59.000Z

    of the requirements for the degree of MASTER OF SCIENCE December 2009 Major Subject: Geology ? KINEMATIC AND MECHANICAL RECONSTRUCTION OF WALKER RIDGE STRUCTURES, DEEPWATER GULF OF MEXICO ? ? A Thesis OLUWATOSIN ENIOLA MAJEKODUNMI.... Bryant Head of Department, Andreas K. Kronenberg December 2009 Major Subject: Geology iii ABSTRACT Kinematic and Mechanical Reconstruction of Walker Ridge Structures, Deepwater Gulf of Mexico. (December 2009...

  10. Local symmetries of non-expanding horizons

    E-Print Network [OSTI]

    Rudranil Basu; Ayan Chatterjee; Amit Ghosh

    2010-04-21T23:59:59.000Z

    Local symmetries of a non-expanding horizon has been investigated in the 1st order formulation of gravity. When applied to a spherically symmetric isolated horizon only a U(1) subgroup of the Lorentz group survives as residual local symmetry that one can make use of in constructing an effective theory on the horizon.

  11. Spacetime Foam Model of the Schwarzschild Horizon

    E-Print Network [OSTI]

    Jarmo Makela; Ari Peltola

    2004-03-19T23:59:59.000Z

    We consider a spacetime foam model of the Schwarzschild horizon, where the horizon consists of Planck size black holes. According to our model the entropy of the Schwarzschild black hole is proportional to the area of its event horizon. It is possible to express geometrical arguments to the effect that the constant of proportionality is, in natural units, equal to one quarter.

  12. deepwater_current_proj | netl.doe.gov

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del SolStrengtheningWildfires mayYuan T. Lee's www.rsc.org/locContactcontractDeepwater

  13. Deepwater Oil & Gas Resources | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't Your Destiny:Revised Finding of No53197 This workDayton: ENERGY8DecommissioningFuelDeepwater Oil

  14. Horizons cannot save the Landscape

    E-Print Network [OSTI]

    Iosif Bena; Alex Buchel; Oscar J. C. Dias

    2012-12-20T23:59:59.000Z

    Solutions with anti-D3 branes in a Klebanov-Strassler geometry with positive charge dissolved in fluxes have a certain singularity corresponding to a diverging energy density of the RR and NS-NS three-form fluxes. There are many hopes and arguments for and against this singularity, and we attempt to settle the issue by examining whether this singularity can be cloaked by a regular event horizon. This is equivalent to the existence of asymptotically Klebanov-Tseytlin or Klebanov-Strassler black holes whose charge measured at the horizon has the opposite sign to the asymptotic charge. We find that no such KT solution exists. Furthermore, for a large class of KS black holes we considered, the charge at the horizon must also have the same sign as the asymptotic charge, and is completely determined by the temperature, the number of fractional branes and the gaugino masses of the dual gauge theory. Our result suggests that antibrane singularities in backgrounds with charge in the fluxes are unphysical, which in turn raises the question as to whether antibranes can be used to uplift AdS vacua to deSitter ones. Our results also point out to a possible instability mechanism for the antibranes.

  15. ERMA Gulf Response http://www.restorethegulf.gov/release/2011/10/28/mapping-response-deepwater-horizon-oil-spill

    E-Print Network [OSTI]

    key agencies including NOAA, EPA, and the White House Office of Science and Technology Policy. The JAG the Department of Energy, EPA, NOAA, the Department of the Interior, and the states of Florida and Louisiana Research and Monitoring Activities Database http://gulfseagrant.tamu.edu/oilspill/database

  16. Acute Embryonic or Juvenile Exposure to Deepwater Horizon Crude Oil Impairs the Swimming Performance of Mahi-Mahi (Coryphaena

    E-Print Network [OSTI]

    Grosell, Martin

    with the water during ascent to the surface.11,12 Thus, PAH exposures likely occurred for adult fish breeding exposure of a water- accommodated fraction of oil from the spill to mahi-mahi as juveniles, or as embryos deficits, likely attributable to polycyclic aromatic hydrocarbons (PAHs), occurred at environmentally

  17. nh Gi Thit Hi Ti Nguyn Thin Nhin ca V Trn Du Deepwater Horizon Cc D n Khu Vc

    E-Print Network [OSTI]

    Lng Sò ip Nhm Tng C Hi ánh Bt Gii Trí Trong Vùng Cán Xong Florida s c thc hin Qun Bay (h thng Vnh St Okaloosa và Walton. Lý tng ra thì bng cách thc hin d án này,s lng sò ip ti các a im c can thip cui cùng có th s tng lên ti các mc t duy trì bn vng c cho vic ánh bt gii trí. S lng sò ip các Qun Gulf và

  18. Spacetime near isolated and dynamical trapping horizons

    E-Print Network [OSTI]

    Ivan Booth

    2014-06-02T23:59:59.000Z

    We study the near-horizon spacetime for isolated and dynamical trapping horizons (equivalently marginally outer trapped tubes). The metric is expanded relative to an ingoing Gaussian null coordinate and the terms of that expansion are explicitly calculated to second order. For the spacelike case, knowledge of the intrinsic and extrinsic geometry of the (dynamical) horizon is sufficient to determine the near-horizon spacetime, while for the null case (an isolated horizon) more information is needed. In both cases spacetime is allowed to be of arbitrary dimension and the formalism accomodates both general relativity as well as more general field equations. The formalism is demonstrated for two applications. First, spacetime is considered near an isolated horizon and the construction is both checked against the Kerr-Newman solution and compared to the well-known near-horizon limit for stationary extremal black hole spacetimes. Second, spacetime is examined in the vicinity of a slowly evolving horizon and it is demonstrated that there is always an event horizon candidate in this region. The geometry and other properties of this null surface match those of the slowly evolving horizon to leading order and in this approximation the candidate evolves in a locally determined way. This generalizes known results for Vaidya as well as certain spacetimes known from studies of the fluid-gravity correspondence.

  19. Variable horizon in a peridynamic medium.

    SciTech Connect (OSTI)

    Silling, Stewart A.; Littlewood, David John; Seleson, Pablo

    2014-10-01T23:59:59.000Z

    A notion of material homogeneity is proposed for peridynamic bodies with vari- able horizon but constant bulk properties. A relation is derived that scales the force state according to the position-dependent horizon while keeping the bulk properties un- changed. Using this scaling relation, if the horizon depends on position, artifacts called ghost forces may arise in a body under homogeneous deformation. These artifacts de- pend on the second derivative of horizon and can be reduced by use of a modified equilibrium equation using a new quantity called the partial stress . Bodies with piece- wise constant horizon can be modeled without ghost forces by using a technique called a splice between the regions. As a limiting case of zero horizon, both partial stress and splice techniques can be used to achieve local-nonlocal coupling. Computational examples, including dynamic fracture in a one-dimensional model with local-nonlocal coupling, illustrate the methods.

  20. Horizon dynamics of distorted rotating black holes

    E-Print Network [OSTI]

    Tony Chu; Harald P. Pfeiffer; Michael I. Cohen

    2011-04-28T23:59:59.000Z

    We present numerical simulations of a Kerr black hole perturbed by a pulse of ingoing gravitational radiation. For strong perturbations we find up to five concentric marginally outer trapped surfaces. These trapped surfaces appear and disappear in pairs, so that the total number of such surfaces at any given time is odd. The world tubes traced out by the marginally outer trapped surfaces are found to be spacelike during the highly dynamical regime, approaching a null hypersurface at early and late times. We analyze the structure of these marginally trapped tubes in the context of the dynamical horizon formalism, computing the expansion of outgoing and incoming null geodesics, as well as evaluating the dynamical horizon flux law and the angular momentum flux law. Finally, we compute the event horizon. The event horizon is well-behaved and approaches the apparent horizon before and after the highly dynamical regime. No new generators enter the event horizon during the simulation.

  1. Apparent horizon in fluid-gravity duality

    SciTech Connect (OSTI)

    Booth, Ivan; Heller, Michal P.; Plewa, Grzegorz; Spalinski, Michal [Department of Mathematics and Statistics, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, A1C 5S7 (Canada); Instituut voor Theoretische Fysica, Universiteit van Amsterdam, Science Park 904, 1090 GL Amsterdam (Netherlands); Soltan Institute for Nuclear Studies, Hoza 69, 00-681 Warsaw (Poland); Soltan Institute for Nuclear Studies, Hoza 69, 00-681 Warsaw (Poland) and Physics Department, University of Bialystok, 15-424 Bialystok (Poland)

    2011-05-15T23:59:59.000Z

    This article develops a computational framework for determining the location of boundary-covariant apparent horizons in the geometry of conformal fluid-gravity duality in arbitrary dimensions. In particular, it is shown up to second order and conjectured to hold to all orders in the gradient expansion that there is a unique apparent horizon which is covariantly expressible in terms of fluid velocity, temperature, and boundary metric. This leads to the first explicit example of an entropy current defined by an apparent horizon and opens the possibility that in the near-equilibrium regime there is preferred foliation of apparent horizons for black holes in asymptotically anti-de Sitter spacetimes.

  2. Seismic Evaluation of Hydrocarbon Saturation in Deep-Water Reservoirs

    SciTech Connect (OSTI)

    Michael Batzle

    2006-04-30T23:59:59.000Z

    During this last period of the ''Seismic Evaluation of Hydrocarbon Saturation in Deep-Water Reservoirs'' project (Grant/Cooperative Agreement DE-FC26-02NT15342), we finalized integration of rock physics, well log analysis, seismic processing, and forward modeling techniques. Most of the last quarter was spent combining the results from the principal investigators and come to some final conclusions about the project. Also much of the effort was directed towards technology transfer through the Direct Hydrocarbon Indicators mini-symposium at UH and through publications. As a result we have: (1) Tested a new method to directly invert reservoir properties, water saturation, Sw, and porosity from seismic AVO attributes; (2) Constrained the seismic response based on fluid and rock property correlations; (3) Reprocessed seismic data from Ursa field; (4) Compared thin layer property distributions and averaging on AVO response; (5) Related pressures and sorting effects on porosity and their influence on DHI's; (6) Examined and compared gas saturation effects for deep and shallow reservoirs; (7) Performed forward modeling using geobodies from deepwater outcrops; (8) Documented velocities for deepwater sediments; (9) Continued incorporating outcrop descriptive models in seismic forward models; (10) Held an open DHI symposium to present the final results of the project; (11) Relations between Sw, porosity, and AVO attributes; (12) Models of Complex, Layered Reservoirs; and (14) Technology transfer Several factors can contribute to limit our ability to extract accurate hydrocarbon saturations in deep water environments. Rock and fluid properties are one factor, since, for example, hydrocarbon properties will be considerably different with great depths (high pressure) when compared to shallow properties. Significant over pressure, on the other hand will make the rocks behave as if they were shallower. In addition to the physical properties, the scale and tuning will alter our hydrocarbon indicators. Gas saturated reservoirs change reflection amplitudes significantly. The goal for the final project period was to systematically combine and document these various effects for use in deep water exploration and transfer this knowledge as clearly and effectively as possible.

  3. Evolution of Atlantic deep-water circulation: from the greenhouse to the icehouse

    E-Print Network [OSTI]

    Via, Rachael Kathleen

    2005-11-01T23:59:59.000Z

    To better understand how the evolution of Cenozoic deep-water circulation related to changes in global climate and ocean basin configuration, we generated Nd isotope records from Ocean Drilling Program sites in the southeastern Atlantic to track...

  4. Two physical characteristics of numerical apparent horizons

    E-Print Network [OSTI]

    Ivan Booth

    2007-12-20T23:59:59.000Z

    This article translates some recent results on quasilocal horizons into the language of $(3+1)$ general relativity so as to make them more useful to numerical relativists. In particular quantities are described which characterize how quickly an apparent horizon is evolving and how close it is to either equilibrium or extremality.

  5. Optical geometry across the horizon

    E-Print Network [OSTI]

    Rickard Jonsson

    2007-08-19T23:59:59.000Z

    In a companion paper (Jonsson and Westman, Class. Quantum Grav. 23 (2006) 61), a generalization of optical geometry, assuming a non-shearing reference congruence, is discussed. Here we illustrate that this formalism can be applied to a finite four-volume of any spherically symmetric spacetime. In particular we apply the formalism, using a non-static reference congruence, to do optical geometry across the horizon of a static black hole. While the resulting geometry in principle is time dependent, we can choose the reference congruence in such a manner that an embedding of the geometry always looks the same. Relative to the embedded geometry the reference points are then moving. We discuss the motion of photons, inertial forces and gyroscope precession in this framework.

  6. A study of different horizons in inhomogeneous LTB cosmological model

    E-Print Network [OSTI]

    Subenoy Chakraborty; Subhajit Saha

    2015-03-04T23:59:59.000Z

    This work deals with a detailed study of the dynamics of the apparent, event and particle horizons in the background of the inhomogeneous LTB spacetime. The comparative study among these horizons shows a distinct character for apparent horizon compared to the other horizons. The apparent horizon will be a trapping horizon if its acceleration is positive. The Kodama vector is also defined and its causal character is found to be similar to that in the FRW model.

  7. Green Investment Horizons: Effects of Policy on the Market for...

    Open Energy Info (EERE)

    Horizons: Effects of Policy on the Market for Building Energy Efficiency Technologies Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Green Investment Horizons: Effects...

  8. New Horizons Mission Powered by Space Radioisotope Power Systems...

    Energy Savers [EERE]

    New Horizons Mission Powered by Space Radioisotope Power Systems New Horizons Mission Powered by Space Radioisotope Power Systems January 30, 2008 - 6:47pm Addthis Artist's concept...

  9. Locating Boosted Kerr and Schwarzschild Apparent Horizons

    E-Print Network [OSTI]

    Mijan F. Huq; Matthew W. Choptuik; Richard A. Matzner

    2000-02-22T23:59:59.000Z

    We describe a finite-difference method for locating apparent horizons and illustrate its capabilities on boosted Kerr and Schwarzschild black holes. Our model spacetime is given by the Kerr-Schild metric. We apply a Lorentz boost to this spacetime metric and then carry out a 3+1 decomposition. The result is a slicing of Kerr/Schwarzschild in which the black hole is propagated and Lorentz contracted. We show that our method can locate distorted apparent horizons efficiently and accurately.

  10. SEISMIC EVALUATION OF HYDROCARBON SATURATION IN DEEP-WATER RESERVOIRS

    SciTech Connect (OSTI)

    Michael Batzle; D-h Han; R. Gibson; Huw James

    2005-08-12T23:59:59.000Z

    We are now entering the final stages of our ''Seismic Evaluation of Hydrocarbon Saturation in Deep-Water Reservoirs'' project (Grant/Cooperative Agreement DE-FC26-02NT15342). We have now developed several techniques to help distinguish economic hydrocarbon deposits from false ''Fizz'' gas signatures. These methods include using the proper in situ rock and fluid properties, evaluating interference effects on data, and doing better constrained inversions for saturations. We are testing these techniques now on seismic data from several locations in the Gulf of Mexico. In addition, we are examining the use of seismic attenuation as indicated by frequency shifts below potential reservoirs. During this quarter we have: Began our evaluation of our latest data set over the Neptune Field; Developed software for computing composite reflection coefficients; Designed and implemented stochastic turbidite reservoir models; Produced software & work flow to improve frequency-dependent AVO analysis; Developed improved AVO analysis for data with low signal-to-noise ratio; and Examined feasibility of detecting fizz gas using frequency attenuation. Our focus on technology transfer continues, both by generating numerous presentations for the upcoming SEG annual meeting, and by beginning our planning for our next DHI minisymposium next spring.

  11. SEISMIC EVALUATION OF HYDROCARBON SATURATION IN DEEP-WATER RESERVOIRS

    SciTech Connect (OSTI)

    M. Batzle; D-h Han; R. Gibson; O. Djordjevic

    2003-03-20T23:59:59.000Z

    The ''Seismic Evaluation of Hydrocarbon Saturation in Deep-Water Reservoirs'' (Grant/Cooperative Agreement DE-FC26-02NT15342) began September 1, 2002. During this second quarter: A Direct Hydrocarbon Indicator (DHI) symposium was held at UH; Current DHI methods were presented and forecasts made on future techniques; Dr. Han moved his laboratory from HARC to the University of Houston; Subcontracts were re-initiated with UH and TAMU; Theoretical and numerical modeling work began at TAMU; Geophysical Development Corp. agreed to provide petrophysical data; Negotiations were begun with Veritas GDC to obtain limited seismic data; Software licensing and training schedules were arranged with Paradigm; and Data selection and acquisition continues. The broad industry symposium on Direct Hydrocarbon Indicators was held at the University of Houston as part of this project. This meeting was well attended and well received. A large amount of information was presented, not only on application of the current state of the art, but also on expected future trends. Although acquisition of appropriate seismic data was expected to be a significant problem, progress has been made. A 3-D seismic data set from the shelf has been installed at Texas A&M University and analysis begun. Veritas GDC has expressed a willingness to provide data in the deep Gulf of Mexico. Data may also be available from TGS.

  12. SEISMIC EVALUATION OF HYDROCARBON SATURATION IN DEEP-WATER RESERVOIRS

    SciTech Connect (OSTI)

    Michael Batzle; D-h Han; R. Gibson; Huw James

    2005-01-22T23:59:59.000Z

    During this last quarter of the ''Seismic Evaluation of Hydrocarbon Saturation in Deep-Water Reservoirs'' project (Grant/Cooperative Agreement DE-FC26-02NT15342), we have moved forward on several fronts, including data acquisition as well as analysis and application. During this quarter we have: (1) Completed our site selection (finally); (2) Measured fluid effects in Troika deep water sand sample; (3) Applied the result to Ursa ''fizz gas'' zone; (4) Compared thin layer property averaging on AVO response; (5) Developed target oriented NMO stretch correction; (6) Examined thin bed effects on A-B crossplots; and (7) Begun incorporating outcrop descriptive models in seismic forward models. Several factors can contribute to limit our ability to extract accurate hydrocarbon saturations in deep water environments. Rock and fluid properties are one factor, since, for example, hydrocarbon properties will be considerably different with great depths (high pressure) when compared to shallow properties. Significant over pressure, on the other hand will make the rocks behave as if they were shallower. In addition to the physical properties, the scale and tuning will alter our hydrocarbon indicators. Reservoirs composed of thin bed effects will broaden the reflection amplitude distribution with incident angle. Normal move out (NMO) stretch corrections based on frequency shifts can be applied to offset this effect. Tuning will also disturb the location of extracted amplitudes on AVO intercept and gradient (A-B) plots. Many deep water reservoirs fall this tuning thickness range. Our goal for the remaining project period is to systematically combine and document these various effects for use in deep water exploration.

  13. Oil biodegradation and bioremediation: A tale of the two worst spills in U.S. history

    E-Print Network [OSTI]

    Atlas, R.M.

    2012-01-01T23:59:59.000Z

    degradation of the BP Deepwater Horizon Spill in the Gulf ofcomparison to the BP Deepwater Horizon spill in the popularExxon Valdez and BP Deepwater Horizon spills, are natural

  14. Six Lessons Learned in Applying Science in Coastal Ecosystem Restoration

    E-Print Network [OSTI]

    Boesch, Donald F.

    2013-01-01T23:59:59.000Z

    on the BP Deepwater Horizon Oil Spill and Offshore Drilling.on the BP Deepwater Horizon Oil Spill and Offshorethe effects of the BP Deepwater Horizon oil spill, both as a

  15. Parens Patriae Litigation to Redress Societal Damages from the BP Oil Spill: The Latest Stage in the Evolution of Crimtorts

    E-Print Network [OSTI]

    Rustad, Michael L.; Koenig, Thomas H.

    2011-01-01T23:59:59.000Z

    COMM'N ON THE BP DEEPWATER HORIZON OIL SPILL AND OFFSHOREon the BP Deepwater Horizon Oil Spill and Offshore DrillingCommission on the BP Deepwater Horizon Oil Spill also cited

  16. Late Cretaceous through Paleogene Reconstruction of Pacific Deep-Water Circulation

    E-Print Network [OSTI]

    Schubert, Jessica

    2012-07-16T23:59:59.000Z

    A growing body of Nd isotope data derived from fish debris and Fe-Mn crusts suggests that the Pacific was characterized by deep-water mass formation in both the North and South Pacific during the Early Paleogene. However, the South Pacific source...

  17. Declines in deepwater sculpin Myoxocephalus thompsonii energy density associated with the

    E-Print Network [OSTI]

    proportion of the offshore fish biomass in these lakes. Deepwater sculpin accounted for 30% of the fish biomass caught in a bottom trawl survey in Lake Michigan during 1999­2007 (Bunnell et al. 2009 in the Arctic and northern Europe (Kontula & Va¨ino¨la¨ 2003). The origin and distribution of deep- water

  18. Windmills or deepwater drills?: Normative Roles of Technology in Norwegian Resource Extraction Policy debates

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Windmills or deepwater drills?: Normative Roles of Technology in Norwegian Resource Extraction, countries worldwide are racing to stake their claim in the Arctic, a new frontier estimated to hold and drilling efforts in the Barents Sea, but also the challenges of harsh weather, darkness, and ice. It also

  19. Revisiting Gribov's Copies Inside The Horizon

    E-Print Network [OSTI]

    R. R. Landim; V. E. R. Lemes; O. S. Ventura; L. C. Q. Vilar

    2014-12-08T23:59:59.000Z

    In this work, we recover the problem of legitimate topologically trivial Gribov copies inside the Gribov horizon. We avoid the reducibility problem which hampered the standard construction of van Baal, and then we are able to build a valid example with spherical symmetry. We also apply the same technique in the presence of a background of a Polyakov instanton in a Euclidian 3D spacetime, in order to study the effect of a non trivial environment in the generation of multiple copies inside the horizon.

  20. Horizon Wind Energy | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdfGetecGtel Jump to:Pennsylvania: EnergyHopkinsville, Kentucky:HorizonHorizon

  1. Reservoir compartmentalization of deep-water Intra Qua Iboe sand (Pliocene), Edop field, offshore Nigeria

    SciTech Connect (OSTI)

    Hermance, W.E.; Olaifa, J.O. [Mobile Producing Nigeria, Lagos (Nigeria); Shanmugam, G. [Mobile Research and Development Corp., Dallas, TX (United States)] [and others

    1995-08-01T23:59:59.000Z

    An integration of 3-D seismic and sedimentological information provides a basis for recognizing and mapping individual flow units within the Intra Qua Iboe (IQI) reservoir (Pliocene), Edop Field, offshore Nigeria. Core examination show the following depositional facies: A-Sandy slump/mass flow, B-Muddy slump/mass flow, C. Bottom current reworking. D-Non-channelized turbidity currents, E. Channelized (coalesced) turbidity currents. F-Channelized (isolated) turbidity currents, G-Pelagic/hemipelagic, H-Levee, I-Reworked slope, J-Wave dominated, and K-Tide dominated facies. With the exception of facies J and K, all these facies are of deep-water affinity. The IQI was deposited on an upper slope environment in close proximity to the shelf edge. Through time, as the shelf edge migrated scaward, deposition began with a channel dominated deep-water system (IQI 1 and 2) and progressed through a slump/debris flow dominated deep-water system (IQI 3, the principle reservoir) to a tide and wave dominated shallow-water system (IQI 4). Compositional and textural similarities between the deep-water facies result in similar log motifs. Furthermore, these depositional facies are not readily apparent as distinct seismic facies. Deep-water facies A, D, E, and F are reservoir facies, whereas facies B, C, G, H, and I are non-reservoir facies. However, Facies G is useful as a seismically mappable event throughout the study area. Mapping of these non-reservoir events provides the framework for understanding gross reservoir architecture. This study has resulted in seven defined reservoir units within the IQI, which serves as the architectural framework for ongoing reservoir characterization.

  2. “American” Pictures and (Trans-)National Iconographies: Mapping Interpictorial Clusters in American Studies

    E-Print Network [OSTI]

    Hebel, Udo J.

    2015-01-01T23:59:59.000Z

    of the Deepwater Horizon BP oil spill in the Gulf of Mexico,fighting the Deepwater Horizon BP oil spill in the Gulf of

  3. www.ictas.vt.edu NEW HORIZONS

    E-Print Network [OSTI]

    Crawford, T. Daniel

    .S. Department of Energy SunShot Initiative calls for an aggressive reduction in the overall systems costs by 75 year for solar with the U.S. surpassing the 10 GW milestone. While the initial cost reductionswww.ictas.vt.edu NEW HORIZONS ICTAS SEMINAR SERIES Towards Ubiquitous Cost- competitive Solar Power

  4. www.ictas.vt.edu NEW HORIZONS

    E-Print Network [OSTI]

    Crawford, T. Daniel

    ) but will largely ignore the false alarms about genetically modified foods ("frankenfoods"), thimerosal in vaccineswww.ictas.vt.edu NEW HORIZONS ICTAS SEMINAR SERIES Nanotechnology and Food Safety "Pigs oink, dogsYoung, is likely very prescient when it comes to the subject of nanotechnology and the food supply. Although FDA

  5. www.ictas.vt.edu NEW HORIZONS

    E-Print Network [OSTI]

    Crawford, T. Daniel

    ,weareseeinganincreasinginvestmentinrenew- able energies, like wind and solar. The development of new technologies leading to a clean energyKellerwasappointedtotheroleofAssociateLaboratoryDirectoratOakRidgeNationalLaboratory(ORNL), on July 1, 2009. On November 1, 2010, a new directorate was formed, Energy and Environmental Scienceswww.ictas.vt.edu NEW HORIZONS ICTAS SEMINAR SERIES From Environmental Science to Next Generation

  6. Cauchy horizon singularity without mass inflation

    E-Print Network [OSTI]

    P. R. Brady; D. Nunez; S. Sinha

    1992-11-20T23:59:59.000Z

    A perturbed Reissner-Nordstr\\"om-de Sitter solution is used to emphasize the nature of the singularity along the Cauchy horizon of a charged spherically symmetric black hole. For these solutions, conditions may prevail under which the mass function is bounded and yet the curvature scalar $R_{\\alpha\\beta\\gamma\\delta} R^{\\alpha\\beta\\gamma\\delta}$ diverges.

  7. The Deepwater Program : a case study in organizational transformation inspired by the parallel interaction of internal and external core groups

    E-Print Network [OSTI]

    Mansharamani, Vikram, 1974-

    2004-01-01T23:59:59.000Z

    This paper attempts to explain why the United States Coast Guard decided to undertake its most recent major capital asset replacement effort-the Deepwater Program-through the use of a systems approach. Several explanations ...

  8. Fiber-optical analogue of the event horizon: Appendices

    E-Print Network [OSTI]

    Thomas G. Philbin; Chris Kuklewicz; Scott Robertson; Stephen Hill; Friedrich Konig; Ulf Leonhardt

    2007-12-13T23:59:59.000Z

    We explain the theory behind our fiber-optical analogue of the event horizon and present the experiment in detail.

  9. Horizons in Robinson-Trautman space-times

    E-Print Network [OSTI]

    W. Natorf; J. Tafel

    2008-07-18T23:59:59.000Z

    The past quasi-local horizons in vacuum Robinson-Trautman spacetimes are described. The case of a null (non-expanding) horizon is discussed. It is shown that the only Robinson-Trautman space-time admitting such a horizon with sections diffeomorphic to S_2 is the Schwarzschild space-time. Weakening this condition leads to the horizons of the C-metric. Properties of the hypersurface r=2m for finite retarded time u are examined.

  10. Apparent Horizons in Vacuum Robinson-Trautman Spacetimes

    E-Print Network [OSTI]

    E. W. M. Chow; A. W. -C. Lun

    1995-04-01T23:59:59.000Z

    Vacuum asymptotically flat Robinson-Trautman spacetimes are a well known class of spacetimes exhibiting outgoing gravitational radiation. In this paper we describe a method of locating the past apparent horizon in these spacetimes, and discuss the properties of the horizon. We show that the past apparent horizon is non-timelike, and that its surface area is a decreasing function of the retarded time. A numerical simulation of the apparent horizon is also discussed.

  11. Fiber-optical analogue of the event horizon

    E-Print Network [OSTI]

    Thomas G. Philbin; Chris Kuklewicz; Scott Robertson; Stephen Hill; Friedrich Konig; Ulf Leonhardt

    2008-02-13T23:59:59.000Z

    The physics at the event horizon resembles the behavior of waves in moving media. Horizons are formed where the local speed of the medium exceeds the wave velocity. We use ultrashort pulses in microstructured optical fibers to demonstrate the formation of an artificial event horizon in optics. We observed a classical optical effect, the blue-shifting of light at a white-hole horizon. We also show by theoretical calculations that such a system is capable of probing the quantum effects of horizons, in particular Hawking radiation.

  12. Crude Injustice in the Gulf: Why Categorical Exclusions for Deepwater Drilling in the Gulf of Mexico are Inconsistent with U.S. International Ocean Law and Policy

    E-Print Network [OSTI]

    Hull, Eric V.

    2011-01-01T23:59:59.000Z

    torium on Deepwater Oil Drilling, Demands Environmentalimpacts. The increasing demand for oil continues to pushthe Gulf ecosystem. Increas- ing demand for oil coupled with

  13. Overview of the New Horizons Science Payload

    E-Print Network [OSTI]

    H. A. Weaver; W. C. Gibson; M. B. Tapley; L. A. Young; S. A. Stern

    2007-09-26T23:59:59.000Z

    The New Horizons mission was launched on 2006 January 19, and the spacecraft is heading for a flyby encounter with the Pluto system in the summer of 2015. The challenges associated with sending a spacecraft to Pluto in less than 10 years and performing an ambitious suite of scientific investigations at such large heliocentric distances (> 32 AU) are formidable and required the development of lightweight, low power, and highly sensitive instruments. This paper provides an overview of the New Horizons science payload, which is comprised of seven instruments. Alice provides spatially resolved ultraviolet spectroscopy. The Ralph instrument has two components: the Multicolor Visible Imaging Camera (MVIC), which performs panchromatic and color imaging, and the Linear Etalon Imaging Spectral Array (LEISA), which provides near-infrared spectroscopic mapping capabilities. The Radio Experiment (REX) is a component of the New Horizons telecommunications system that provides both occultation and radiometry capabilities. The Long Range Reconnaissance Imager (LORRI) provides high sensitivity, high spatial resolution optical imaging capabilities. The Solar Wind at Pluto (SWAP) instrument measures the density and speed of solar wind particles. The Pluto Energetic Particle Spectrometer Science Investigation (PEPSSI) measures energetic protons and CNO ions. The Venetia Burney Student Dust Counter (VB-SDC) is used to record dust particle impacts during the cruise phases of the mission.

  14. The Event Horizon of M87

    E-Print Network [OSTI]

    Avery E. Broderick; Ramesh Narayan; John Kormendy; Eric S. Perlman; Marcia J. Rieke; Sheperd S. Doeleman

    2015-03-12T23:59:59.000Z

    The 6 billion solar mass supermassive black hole at the center of the giant elliptical galaxy M87 powers a relativistic jet. Observations at millimeter wavelengths with the Event Horizon Telescope have localized the emission from the base of this jet to angular scales comparable to the putative black hole horizon. The jet might be powered directly by an accretion disk or by electromagnetic extraction of the rotational energy of the black hole. However, even the latter mechanism requires a confining thick accretion disk to maintain the required magnetic flux near the black hole. Therefore, regardless of the jet mechanism, the observed jet power in M87 implies a certain minimum mass accretion rate. If the central compact object in M87 were not a black hole but had a surface, this accretion would result in considerable thermal near-infrared and optical emission from the surface. Current flux limits on the nucleus of M87 strongly constrain any such surface emission. This rules out the presence of a surface and thereby provides indirect evidence for an event horizon.

  15. The Event Horizon of M87

    E-Print Network [OSTI]

    Avery E. Broderick; Ramesh Narayan; John Kormendy; Eric S. Perlman; Marcia J. Rieke; Sheperd S. Doeleman

    2015-04-05T23:59:59.000Z

    The 6 billion solar mass supermassive black hole at the center of the giant elliptical galaxy M87 powers a relativistic jet. Observations at millimeter wavelengths with the Event Horizon Telescope have localized the emission from the base of this jet to angular scales comparable to the putative black hole horizon. The jet might be powered directly by an accretion disk or by electromagnetic extraction of the rotational energy of the black hole. However, even the latter mechanism requires a confining thick accretion disk to maintain the required magnetic flux near the black hole. Therefore, regardless of the jet mechanism, the observed jet power in M87 implies a certain minimum mass accretion rate. If the central compact object in M87 were not a black hole but had a surface, this accretion would result in considerable thermal near-infrared and optical emission from the surface. Current flux limits on the nucleus of M87 strongly constrain any such surface emission. This rules out the presence of a surface and thereby provides indirect evidence for an event horizon.

  16. Falling through the black hole horizon

    E-Print Network [OSTI]

    Brustein, Ram

    2015-01-01T23:59:59.000Z

    We consider the fate of a small classical object, a "stick", as it falls through the horizon of a large black hole (BH). Classically, the equivalence principle dictates that the stick is affected by small tidal forces, and Hawking's quantum-mechanical model of BH evaporation makes essentially the same prediction. If, on the other hand, the BH horizon is surrounded by a "firewall", the stick will be consumed as it falls through. We have recently extended Hawking's model by taking into account the quantum fluctuations of the geometry and the classical back-reaction of the emitted particles. Here, we calculate the strain exerted on the falling stick for our model. The strain depends on the near-horizon state of the Hawking pairs. We find that, after the Page time when the state of the pairs deviates significantly from maximal entanglement (as required by unitarity), the induced strain in our semiclassical model is still parametrically small. This is because the number of the disentangled pairs is parametrically ...

  17. Aeolian Delivery of Organic Matter to a Middle Permian Deepwater Ramp

    E-Print Network [OSTI]

    Artan, Sinem

    2012-07-16T23:59:59.000Z

    -Chairs of Committee, Bruce Herbert Mike Tice Committee Member, Thomas McDonald Head of Department, Andreas Kronenberg May 2011 Major Subject: Geology iii ABSTRACT Aeolian Delivery of Organic Matter to a Middle Permian Deepwater Ramp. (May 2011..., Semra Artan, and my father, Mehmet Ali Artan vi ACKNOWLEDGEMENTS I would like to express my deepest gratitude to my co-advisors, Dr. Bruce Herbert and Dr. Mike Tice, for their time, guidance and advice throughout the course of this research. I...

  18. Thermoelectric DC conductivities from black hole horizons

    E-Print Network [OSTI]

    Aristomenis Donos; Jerome P. Gauntlett

    2014-10-14T23:59:59.000Z

    An analytic expression for the DC electrical conductivity in terms of black hole horizon data was recently obtained for a class of holographic black holes exhibiting momentum dissipation. We generalise this result to obtain analogous expressions for the DC thermoelectric and thermal conductivities. We illustrate our results using some holographic Q-lattice black holes as well as for some black holes with linear massless axions, in both $D=4$ and $D=5$ bulk spacetime dimensions, which include both spatially isotropic and anisotropic examples. We show that some recently constructed ground states of holographic Q-lattices, which can be either electrically insulating or metallic, are all thermal insulators.

  19. Inflationary Axion Cosmology Beyond Our Horizon

    E-Print Network [OSTI]

    David B. Kaplan; Ann E. Nelson

    2008-09-07T23:59:59.000Z

    In theories of axion dark matter with large axion decay constant, temperature variations in the CMB are extremely sensitive to perturbations in the initial axion field, allowing one to place a lower bound on the total amount of inflation. The most stringent bound comes from axion strings, which for axion decay constant f=10^17 GeV would currently be observable at a distance of 6 x 10^16 light-years, nearly ten million times as far away as our horizon.

  20. ARM: W-Band Scanning ARM Cloud Radar (W-SACR) Hemispherical Sky RHI Scans (6 horizon-to-horizon scans at 30-degree azimuth intervals)

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

    Widener, Kevin; Nelson, Dan; Bharadwaj, Nitin; Lindenmaier, Iosif [Andrei; Johnson, Karen

    W-Band Scanning ARM Cloud Radar (W-SACR) Hemispherical Sky RHI Scans (6 horizon-to-horizon scans at 30-degree azimuth intervals)

  1. ARM: X-Band Scanning ARM Cloud Radar (XSACR) Hemispherical Sky RHI Scans (6 horizon-to-horizon scans at 30-degree azimuth intervals)

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

    Widener, Kevin; Nelson, Dan; Bharadwaj, Nitin; Lindenmaier, Iosif [Andrei; Johnson, Karen

    X-Band Scanning ARM Cloud Radar (XSACR) Hemispherical Sky RHI Scans (6 horizon-to-horizon scans at 30-degree azimuth intervals)

  2. ARM: Ka-Band Scanning ARM Cloud Radar (KASACR) Hemispherical Sky RHI Scan (6 horizon-to-horizon scans at 30-degree azimuth intervals)

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

    Bharadwaj, Nitin; Widener, Kevin

    Ka-Band Scanning ARM Cloud Radar (KASACR) Hemispherical Sky RHI Scan (6 horizon-to-horizon scans at 30-degree azimuth intervals)

  3. Assessing the value of 3D post-stack seismic amplitude data in forecasting fluid production from a deepwater Gulf-of-Mexico

    E-Print Network [OSTI]

    Torres-Verdín, Carlos

    a deepwater Gulf-of-Mexico reservoir Maika Gambús-Ordaz and Carlos Torres-Verdín The University of Texas in the deepwater Gulf of Mexico. The availability of measured time records of fluid production and pressure of Mexico, offshore the coast of Louisiana. We pursue two specific objectives: · To quantitatively integrate

  4. Black Hole Initial Data with a Horizon of Prescribed Geometry

    E-Print Network [OSTI]

    Brian Smith

    2007-10-04T23:59:59.000Z

    The purpose of this work is to construct asymptotically flat, time symmetric initial data with an apparent horizon of prescribed intrinsic geometry. To do this, we use the parabolic partial differential equation for prescribing scalar curvature. In this equation the horizon geometry is contained within the freely specifiable part of the metric. This contrasts with the conformal method in which the geometry of the horizon can only be specified up to a conformal factor.

  5. Physical process first law and caustic avoidance for Rindler horizon

    E-Print Network [OSTI]

    Srijit Bhattacharjee; Sudipta Sarkar

    2014-12-03T23:59:59.000Z

    We study the perturbation induced by a slowly rotating massive object as it passes through a Rindler horizon. It is shown that the passage of this object can be approximately modeled as Delta\\,function type tidal distortions hitting the horizon. Further, following the analysis presented by Amsel, Marolf and Virmani related to the issue of the validity of physical process first law, we establish a condition on the size of the object so that this law holds for the Rindler horizon.

  6. Isolated Horizons: A Generalization of Black Hole Mechanics

    E-Print Network [OSTI]

    Abhay Ashtekar; Christopher Beetle; Stephen Fairhurst

    1998-12-18T23:59:59.000Z

    A set of boundary conditions defining a non-rotating isolated horizon are given in Einstein-Maxwell theory. A space-time representing a black hole which itself is in equilibrium but whose exterior contains radiation admits such a horizon . Physically motivated, (quasi-)local definitions of the mass and surface gravity of an isolated horizon are introduced. Although these definitions do not refer to infinity, the quantities assume their standard values in Reissner-Nordstrom solutions. Finally, using these definitions, the zeroth and first laws of black hole mechanics are established for isolated horizons.

  7. Gribov's horizon and the ghost dressing function

    E-Print Network [OSTI]

    Boucaud, Ph; Yaouanc, A Le; Micheli, J; Pène, O; Rodríguez-Quintero, J

    2009-01-01T23:59:59.000Z

    We study a relation recently derived by K. Kondo at zero momentum between the Zwanziger's horizon function, the ghost dressing function and Kugo's functions $u$ and $w$. We agree with this result as far as bare quantities are considered. However, assuming the validity of the horizon gap equation, we argue that the solution $w(0)=0$ is not acceptable since it would lead to a vanishing renormalised ghost dressing function. On the contrary, when the cut-off goes to infinity, $u(0) \\to \\infty$, $w(0) \\to -\\infty$ such that $u(0)+w(0) \\to -1$. Furthermore $w$ and $u$ are not multiplicatively renormalisable. Relaxing the gap equation allows $w(0)=0$ with $u(0) \\to -1$. In both cases the bare ghost dressing function, $F(0,\\Lambda)$, goes logarithmically to infinity at infinite cut-off. We show that, although the lattice results provide bare results not so different from the $F(0,\\Lambda)=3$ solution, this is an accident due to the fact that the lattice cut-offs lie in the range 1-3 GeV$^{-1}$. We show that the renor...

  8. The Event Horizon of M87

    E-Print Network [OSTI]

    Narayan, Ramesh; Perlman, Eric S; Rieke, Marcia J; Doeleman, Sheperd S

    2015-01-01T23:59:59.000Z

    The 6 billion solar mass supermassive black hole at the center of the giant elliptical galaxy M87 powers a relativistic jet. Observations at millimeter wavelengths with the Event Horizon Telescope have localized the emission from the base of this jet to angular scales comparable to the putative black hole horizon. The jet might be powered directly by an accretion disk or by electromagnetic extraction of the rotational energy of the black hole. However, even the latter mechanism requires a confining thick accretion disk to maintain the required magnetic flux near the black hole. Therefore, regardless of the jet mechanism, the observed jet power in M87 implies a certain minimum mass accretion rate. If the central compact object in M87 were not a black hole but had a surface, this accretion would result in considerable thermal near-infrared and optical emission from the surface. Current flux limits on the nucleus of M87 strongly constrain any such surface emission. This rules out the presence of a surface and th...

  9. Air-Shower Spectroscopy at horizons

    E-Print Network [OSTI]

    D. Fargion

    2005-11-20T23:59:59.000Z

    Horizontal and Upward air-showers are suppressed by deep atmosphere opacity and by the Earth shadows. In such noise-free horizontal and upward directions rare Ultra High Cosmic rays and rarer neutrino induced air-showers may shine, mostly mediated by resonant PeVs interactions in air or by higher energy Tau Air-showers originated by neutrino tau skimming the Earth. At high altitude (mountains, planes, balloons) the air density is so rarefied that nearly all common air-showers might be observed at their maximal growth at a tuned altitude and directions. The arrival angle samples different distances and the corresponding most probable primary cosmic ray energy. The larger and larger distances (between observer and C.R. interaction) make wider and wider the shower area and it enlarge the probability to be observed (up to three order of magnitude more than vertical showers); the observation of a maximal electromagnetic shower development may amplify the signal by two-three order of magnitude (respect suppressed shower at sea level); the peculiar altitude-angle range may disentangle at best the primary cosmic ray energy and composition. Even from existing mountain observatory the up-going air-showers may trace, above the horizons, PeV-EeV high energy cosmic rays and, below the horizons, PeV-EeV neutrino astronomy: their early signals may be captured in already existing gamma telescopes as Magic at Canarie, while facing the Earth edges during (useless) cloudy nights.

  10. Cool horizons lead to information loss

    E-Print Network [OSTI]

    Borun D. Chowdhury

    2013-07-29T23:59:59.000Z

    There are two evidences for information loss during black hole evaporation: (i) a pure state evolves to a mixed state and (ii) the map from the initial state to final state is non-invertible. Any proposed resolution of the information paradox must address both these issues. The firewall argument focuses only on the first and this leads to order one deviations from the Unruh vacuum for maximally entangled black holes. The nature of the argument does not extend to black holes in pure states. It was shown by Avery, Puhm and the author that requiring the initial state to final state map to be invertible mandates structure at the horizon even for pure states. The proof works if black holes can be formed in generic states and in this paper we show that this is indeed the case. We also demonstrate how models proposed by Susskind, Papadodimas et al. and Maldacena et al. end up making the initial to final state map non-invertible and thus make the horizon "cool" at the cost of unitarity.

  11. The influence of droplet size and biodegradation on the transport of subsurface oil droplets during the Deepwater Horizon: a model sensitivity study

    E-Print Network [OSTI]

    North, Elizabeth W

    A better understanding of oil droplet formation, degradation, and dispersal in deep waters is needed to enhance prediction of the fate and transport of subsurface oil spills. This research evaluates the influence of initial ...

  12. CHAPTER 4: THE DEEPWATER HORIZON OIL SPILL NATURAL RESOURCE INJURY ASSESSMENT.................1 4.1 The Injury Assessment Process: Assessing Injuries in a Complex, Interconnected Ecosystem ....1

    E-Print Network [OSTI]

    .1 The Injury Assessment Process: Assessing Injuries in a Complex, Interconnected Ecosystem ....1 4.2 Injuries the public with an overview of the potential impacts to resources in the Gulf of Mexico ecosystem caused

  13. TM TT TNG QUAN Vo khong ngy 20 thng 4 nm 2010, n v khoan lu ng ngoi khi Deepwater Horizon, tng

    E-Print Network [OSTI]

    ng phó vi lng du tràn). Ngoài ra, hn 1 triu gallon các cht phân tán ã c dùng cho vùng bin thuc khu vc du tràn nhm phân tán du.1 H qu ca s c tràn du này là mt lng khí gas t nhiên cha nh lng ã thi vào môi trng. Lc lng Bo v b bin Hoa K ã ng phó và ch o các n lc liên bang nhm ngn chn và làm sch du tràn. Phm

  14. Environmental disaster or just a drop in the bucket?: Texas scientists on the real effects of the Deepwater Horizon oil spill

    E-Print Network [OSTI]

    Lee, Leslie

    2011-01-01T23:59:59.000Z

    that caused the leak. #22;ousands of barrels of oil leaked from the well each day until it was capped on July #23;#21;, #25;#24;#23;#24;. #22;e National Oceanic and Atmospheric Administration?s (NOAA) #28;nal total estimate, contested by BP for being too... of methane, creating huge plumes, McKinney said. Skimming the oil, using dispersants, and using bioremediation are all arti#28;cial processes for breaking down oil. Natural processes, such as photo-oxidation, physical breakdown from waves...

  15. An engineering approach to characterizing synthetic-based drilling fluids for deepwater and extended reach drilling applications

    SciTech Connect (OSTI)

    Dye, W.M. [Baker Hughes INTEQ, Houston, TX (United States); Robinson, G.; Mullen, G.A.

    1998-12-31T23:59:59.000Z

    Rheological techniques currently employed to characterize drilling fluids are based upon models and instrumentation that were in existence over forty years ago. A great deal of literature exists that questions the degree to which these techniques address the requirements placed on drilling muds in today`s drilling environment. The solution to many of the problems facing companies operating in deepwater requires an in-depth understanding of the rheological properties of synthetic-based drilling muds. These problems include lost circulation, hole cleaning and barite sag. This paper discusses the application of sophisticated rheological instrumentation and techniques that specifically address the needs of deepwater drilling operations. Focus has been placed on studying the gel structure of synthetics, particularly at low temperatures, in order to provide engineered solutions to get strength-related problems encountered in deepwater.

  16. Orientation The Harvard School of Engineering and Applied Sciences (SEAS) was

    E-Print Network [OSTI]

    · Served on the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling, 2010

  17. WRITTEN STATEMENT OF DAVID M. KENNEDY

    E-Print Network [OSTI]

    in the Deepwater Horizon BP oil spill response effort. My name is David Kennedy, I am the Assistant Administrator. The Deepwater Horizon BP oil spill, the largest accidental oil spill in history, is only the most recent example for the Deepwater Horizon BP oil spill, successes and challenges of the Deepwater Horizon NRDA, and the current

  18. Ultra-Deepwater and Unconventional Natural Gas and Other Petroleum Resources

    SciTech Connect (OSTI)

    Russell E. Fray

    2007-06-30T23:59:59.000Z

    RPSEA is currently in its first year of performance under contract DE-AC26-07NT42677, Ultra-Deepwater and Unconventional Natural Gas and Other Petroleum Resources Program Administration. Progress continues to be made in establishing the program administration policies, procedures, and strategic foundation for future research awards. Significant progress was made in development of the draft program solicitations. In addition, RPSEA personnel continued an aggressive program of outreach to engage the industry and ensure wide industry participation in the research award solicitation process.

  19. Ultra-Deepwater and Unconventional Natural Gas and Other Petroleum Resources

    SciTech Connect (OSTI)

    Russell E. Fray

    2007-05-31T23:59:59.000Z

    RPSEA is currently in its first year of performance under contract DE-AC26-07NT42677, Ultra-Deepwater and Unconventional Natural Gas and Other Petroleum Resources Program Administration. Significant progress has been made in establishing the program administration policies, procedures, and strategic foundation for future research awards. RPSEA has concluded an industry-wide collaborative effort to identify focus areas for research awards under this program. This effort is summarized in the RPSEA Draft Annual Plan, which is currently under review by committees established by the Secretary of Energy.

  20. Controller Synthesis for Constrained Flight Systems via Receding Horizon Optimization

    E-Print Network [OSTI]

    Murray, Richard M.

    Controller Synthesis for Constrained Flight Systems via Receding Horizon Optimization Richard M stabilize flight systems us- ing receding horizon, optimal control.1,8 This pa- per advocates the use functions at the inner and outer loop levels and significantly enhances the ability of the control system

  1. Finite-Horizon Optimal Transmission Policies for Energy Harvesting Sensors

    E-Print Network [OSTI]

    Jagannathan, Krishna

    Finite-Horizon Optimal Transmission Policies for Energy Harvesting Sensors Rahul Vaze School: krishnaj@ee.iitm.ac.in Abstract--In this paper, we derive optimal transmission poli- cies for energy harvesting sensors to maximize the utility obtained over a finite horizon. First, we consider a single energy

  2. Airships: A New Horizon for Science

    E-Print Network [OSTI]

    Miller, Sarah H; Hillenbrand, Lynne; Rhodes, Jason; Baird, Gil; Blake, Geoffrey; Booth, Jeff; Carlile, David E; Duren, Riley; Edworthy, Frederick G; Freeze, Brent; Friedl, Randall R; Goldsmith, Paul F; Hall, Jeffery L; Hoffman, Scott E; Hovarter, Scott E; Jensen-Clem, Rebecca M; Jones, Ross M; Kauffmann, Jens; Kiessling, Alina; King, Oliver G; Konidaris, Nick; Lachenmeier, Timothy L; Lord, Steven D; Neu, Jessica; Quetin, Gregory R; Ram, Alan; Sander, Stanley; Simard, Marc; Smith, Mike; Smith, Steve; Smoot, Sara; Susca, Sara; Swann, Abigail; Young, Eliot F; Zambrano, Thomas

    2014-01-01T23:59:59.000Z

    The "Airships: A New Horizon for Science" study at the Keck Institute for Space Studies investigated the potential of a variety of airships currently operable or under development to serve as observatories and science instrumentation platforms for a range of space, atmospheric, and Earth science. The participants represent a diverse cross-section of the aerospace sector, NASA, and academia. Over the last two decades, there has been wide interest in developing a high altitude, stratospheric lighter-than-air (LTA) airship that could maneuver and remain in a desired geographic position (i.e., "station-keeping") for weeks, months or even years. Our study found considerable scientific value in both low altitude ( 60 kft) airships across a wide spectrum of space, atmospheric, and Earth science programs. Over the course of the study period, we identified stratospheric tethered aerostats as a viable alternative to airships where station-keeping was valued over maneuverability. By opening up the sky and Earth's strato...

  3. Thermodynamics of apparent horizon and modified Friedman equations

    E-Print Network [OSTI]

    Ahmad Sheykhi

    2010-12-02T23:59:59.000Z

    Starting from the first law of thermodynamics, $dE=T_hdS_h+WdV$, at apparent horizon of a FRW universe, and assuming that the associated entropy with apparent horizon has a quantum corrected relation, $S=\\frac{A}{4G}-\\alpha \\ln \\frac{A}{4G}+\\beta \\frac{4G}{A}$, we derive modified Friedmann equations describing the dynamics of the universe with any spatial curvature. We also examine the time evolution of the total entropy including the quantum corrected entropy associated with the apparent horizon together with the matter field entropy inside the apparent horizon. Our study shows that, with the local equilibrium assumption, the generalized second law of thermodynamics is fulfilled in a region enclosed by the apparent horizon.

  4. Deep-sea oil plume enriches psychrophilic oil-degrading bacteria

    SciTech Connect (OSTI)

    Hazen, T.C.; Dubinsky, E.A.; DeSantis, T.Z.; Andersen, G.L.; Piceno, Y.M.; Singh, N.; Jansson, J.K.; Probst, A.; Borglin, S.E.; Fortney, J.L.; Stringfellow, W.T.; Bill, M.; Conrad, M.S.; Tom, L.M.; Chavarria, K.L.; Alusi, T.R.; Lamendella, R.; Joyner, D.C.; Spier, C.; Auer, M.; Zemla, M.L.; Chakraborty, R.; Sonnenthal, E.L.; D'haeseleer, P.; Holman, H.-Y. N.; Osman, S.; Lu, Z.; Van Nostrand, J.D.; Deng, Y.; Zhou, J.; Mason, O.U.

    2010-09-01T23:59:59.000Z

    The biological effects and expected fate of the vast amount of oil in the Gulf of Mexico from the Deepwater Horizon blowout are unknown owing to the depth and magnitude of this event. Here, we report that the dispersed hydrocarbon plume stimulated deep-sea indigenous {gamma}-Proteobacteria that are closely related to known petroleum degraders. Hydrocarbon-degrading genes coincided with the concentration of various oil contaminants. Changes in hydrocarbon composition with distance from the source and incubation experiments with environmental isolates demonstrated faster-than-expected hydrocarbon biodegradation rates at 5 C. Based on these results, the potential exists for intrinsic bioremediation of the oil plume in the deep-water column without substantial oxygen drawdown.

  5. Horizon news function and quasi-local energy-momentum flux near black hole

    E-Print Network [OSTI]

    Yu-Huei Wu

    2007-03-27T23:59:59.000Z

    From the 'quasi-local' definition of horizons, e.g. isolated horizon and dynamical horizon, the consequence quasi-local energy-momentum near horizons can be observed by using the idea of frame alignment. In particular, we find the horizon news function from the asymptotic expansion near horizons and use this to describe the gravitational flux and change of mass of a black hole.

  6. SunLine Expands Horizons with Fuel Cell Bus Demo. Hydrogen, Fuel...

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

    Expands Horizons with Fuel Cell Bus Demo. Hydrogen, Fuel Cells & Infrastructure Technologies Program, Fuel Cell Bus Demonstration Projects (Fact Sheet). SunLine Expands Horizons...

  7. INVESTIGATION OF DEEP-WATER CIRCULATION MODES IN THE EARLY CENOZOIC USING NEODYMIUM ISOTOPES FROM FOSSIL FISH DEBRIS

    E-Print Network [OSTI]

    Jones, Landon 1989-

    2011-05-10T23:59:59.000Z

    The ocean’s deep-water circulation plays a large role in heat transport across the globe. Circulation in the modern begins where cold, dense surface waters of the North Atlantic and Southern oceans sink to form Atlantic Bottom water. However...

  8. Perturbative String Thermodynamics near Black Hole Horizons

    E-Print Network [OSTI]

    Thomas G. Mertens; Henri Verschelde; Valentin I. Zakharov

    2014-10-29T23:59:59.000Z

    We provide further computations and ideas to the problem of near-Hagedorn string thermodynamics near (uncharged) black hole horizons, building upon our earlier work JHEP 1403 (2014) 086. The relevance of long strings to one-loop black hole thermodynamics is emphasized. We then provide an argument in favor of the absence of $\\alpha'$-corrections for the (quadratic) heterotic thermal scalar action in Rindler space. We also compute the large $k$ limit of the cigar orbifold partition functions (for both bosonic and type II superstrings) which allows a better comparison between the flat cones and the cigar cones. A discussion is made on the general McClain-Roth-O'Brien-Tan theorem and on the fact that different torus embeddings lead to different aspects of string thermodynamics. The black hole/string correspondence principle for the 2d black hole is discussed in terms of the thermal scalar. Finally, we present an argument to deal with arbitrary higher genus partition functions, suggesting the breakdown of string perturbation theory (in $g_s$) to compute thermodynamical quantities in black hole spacetimes.

  9. Crude Injustice in the Gulf: Why Categorical Exclusions for Deepwater Drilling in the Gulf of Mexico are Inconsistent with U.S. International Ocean Law and Policy

    E-Print Network [OSTI]

    Hull, Eric V.

    2011-01-01T23:59:59.000Z

    A MORATORIUM ON ALL DRILLING OF WELLS 1 (2010), available atwell and that drilling the relief well could take severalbillion to build. Drilling a deep-water well can add another

  10. Method development for 234U and 230Th determination and application to fossil deep-water coral and authigenic carbonate dating from the Campos Basin - Brazil

    E-Print Network [OSTI]

    Vivone, Ronaldo J; Godoy, Maria Luiza D. P; Godoy, José Marcus; Santos, Guaciara M

    2012-01-01T23:59:59.000Z

    Petrobras) for the fossil coral and the authigenic carbonateto Fossil Deep- Water Coral and Authigenic Carbonate DatingFor the fossil deep-water corals samples from Campos Basin,

  11. A note on electrical and thermodynamic properties of Isolated Horizon

    E-Print Network [OSTI]

    Gerui Chen; Xiaoning Wu; Sijie Gao

    2014-10-29T23:59:59.000Z

    The electrical laws and Carnot cycle of Isolated Horizon (IH) are investigated in this paper. We establish the Ohm's law and Joule's law of an Isolated Horizon, and find that the conceptual picture of black holes (Membrane Paradigm) can also apply to this kind of quasi-local black holes. We also investigate the geometrical properties near a non-rotating IH, and find that under the first-order approximation of r, there exist a Killing vector and a Hamiltonian conjugate to it, so this vector is a physical observer. We calculate the energy as measured at infinity of a particle at rest outside a non-rotating IH, and use this result to construct a reversible Carnot cycle with the Isolated Horizon as a cold reservoir, which confirms the thermodynamic nature of Isolated Horizon.

  12. A note on electrical and thermodynamic properties of Isolated Horizon

    E-Print Network [OSTI]

    Chen, Gerui; Gao, Sijie

    2014-01-01T23:59:59.000Z

    The electrical laws and Carnot cycle of Isolated Horizon (IH) are investigated in this paper. We establish the Ohm's law and Joule's law of an Isolated Horizon, and find that the conceptual picture of black holes (Membrane Paradigm) can also apply to this kind of quasi-local black holes. We also investigate the geometrical properties near a non-rotating IH, and find that under the first-order approximation of r, there exist a Killing vector and a Hamiltonian conjugate to it, so this vector is a physical observer. We calculate the energy as measured at infinity of a particle at rest outside a non-rotating IH, and use this result to construct a reversible Carnot cycle with the Isolated Horizon as a cold reservoir, which confirms the thermodynamic nature of Isolated Horizon.

  13. Green functions and Euclidean fields near the bifurcate Killing horizon

    E-Print Network [OSTI]

    Z. Haba

    2007-08-13T23:59:59.000Z

    We approximate a Euclidean version of a D+1 dimensional manifold with a bifurcate Killing horizon by a product of a two-dimensional Rindler space and a D-1 dimensional manifold M. We obtain approximate formulas for the Green functions. We study the behaviour of Green functions near the horizon and their dimensional reduction. We show that if M is compact then the massless minimally coupled quantum field contains a zero mode which is a conformal invariant free field on R^2. Then, the Green function near the horizon can be approximated by the Green function of the two-dimensional quantum field theory. The correction term is exponentially small away from the horizon. If the volume of a geodesic ball is growing to infinity with its radius then the Green function cannot be approximated by a two-dimensional one.

  14. Effect of time horizon on incremental cost-effectiveness ratios

    E-Print Network [OSTI]

    Sondhi, Manu

    2005-01-01T23:59:59.000Z

    Background: Estimation of cost-effectiveness of a therapy as compared with another, in healthcare, is often based on a single perspective and a single time horizon. In this thesis, I explored methods of extrapolating the ...

  15. Predictive energy management for hybrid electric vehicles -Prediction horizon and

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Predictive energy management for hybrid electric vehicles - Prediction horizon and battery capacity of a combined hybrid electric vehicle. Keywords: Hybrid vehicles, Energy Management, Predictive control, Optimal predictive energy management realistic. This energy management strategy uses a dynamic programming algorithm

  16. Approximate Dynamic Programming for a Class of Long-Horizon ...

    E-Print Network [OSTI]

    2014-04-06T23:59:59.000Z

    require hours to produce good solutions even when the planning horizon is 90 ... Surveys of general IRPs for all modes of transportation are given in [1] and [9]. .... Dynamic fleet management problems are a special case in this problem class.

  17. Can an evolving Universe host a static event horizon?

    E-Print Network [OSTI]

    Aharon Davidson; Shimon Rubin; Yosef Verbin

    2012-11-09T23:59:59.000Z

    We prove the existence of general relativistic perfect fluid black hole solutions, and demonstrate the phenomenon for the $P=w\\rho$ class of equations of state. While admitting a local time-like Killing vector on the event horizon itself, the various black hole configurations are necessarily time dependent (thereby avoiding a well known no-go theorem) away from the horizon. Consistently, Hawking's imaginary time periodicity is globally manifest on the entire spacetime manifold.

  18. Universal thermodynamics in different gravity theories: Modified entropy on the horizons

    E-Print Network [OSTI]

    Saugata Mitra; Subhajit Saha; Subenoy Chakraborty

    2015-03-10T23:59:59.000Z

    The paper deals with universal thermodynamics for FRW model of the universe bounded by apparent (or event) horizon. Assuming Hawking temperature on the horizon, the unified first law is examined on the horizon for different gravity theories. The results show that equilibrium configuration is preserved with a modification to Bekenstein entropy on the horizon.

  19. Classical seismic sequence stratigraphic interpretation of intraslope basin fill: Deepwater Nigeria

    SciTech Connect (OSTI)

    Duncan, E.A. [BP Exploration Operating Co., Ltd., Stavanger (Norway)

    1995-08-01T23:59:59.000Z

    Detailed interpretation of seismic facies patterns performed within the workstation environment provides an observation based methodology for constructing depositional models of turbidite and other reservoir bearing systems expected in deepwater Nigeria. The increased fidelity of the workstation allows greater detail and accuracy to be imposed onto depositional model construction by vastly improving the discrimination of depositional from structural seismic reflection geometries. In deepwater Nigeria interslope basins, depositional cyclicity is clearly indicated by vertical seismic facies successions in the same way as can be recognized in bed thickness trends from outcrop or well log data. The recognition of the seismic facies successions appears to break the stratigraphy into at least fourth and fifth order scale sequences. Highly {open_quotes}zoomed{close_quotes} instantaneous phase displays enhance the reflection character so that near outcrop scale (resolution less than 50 mters) interpretations of depositional facies can be made. Common seismic facies and geologic interpretation include: (1) low angle erosional surfaces as channel scour or mass wasting detachment; (2) low relief mounds, often in compensation cycle overlapping stacks reflecting compacted channelbelt fill; (3) unidirectional, low angle clinoform sets suggesting laterial accretion within a channel belt or possible contourite mounds; (4) abrupt, shingled blocks illustrating tilted fault blocks of small scale intraformation slumping; and (5) high reflection amplitude and continuous, parallel reflections of pelagic and hemipelagic condensed sections. There are other subtle seismic facies resolvable given the incraesed fidelity of the workstation interpretation. Mapping and translation of these geometries into more robust stratigraphic predictions should have positive impact on exploration and development success.

  20. Review of the independent risk assessment of the proposed Cabrillo liquified natural gas deepwater port project.

    SciTech Connect (OSTI)

    Gritzo, Louis Alan; Hightower, Marion Michael; Covan, John Morgan; Luketa-Hanlin, Anay Josephine

    2006-01-01T23:59:59.000Z

    In March 2005, the United States Coast Guard requested that Sandia National Laboratories provide a technical review and evaluation of the appropriateness and completeness of models, assumptions, analyses, and risk management options presented in the Cabrillo Port LNG Deepwater Port Independent Risk Assessment-Revision 1 (Cabrillo Port IRA). The goal of Sandia's technical evaluation of the Cabrillo Port IRA was to assist the Coast Guard in ensuring that the hazards to the public and property from a potential LNG spill during transfer, storage, and regasification operations were appropriately evaluated and estimated. Sandia was asked to review and evaluate the Cabrillo Port IRA results relative to the risk and safety analysis framework developed in the recent Sandia report, ''Guidance on Risk Analysis and Safety Implications of a Large Liquefied Natural Gas (LNG) Spill over Water''. That report provides a framework for assessing hazards and identifying approaches to minimize the consequences to people and property from an LNG spill over water. This report summarizes the results of the Sandia review of the Cabrillo Port IRA and supporting analyses. Based on our initial review, additional threat and hazard analyses, consequence modeling, and process safety considerations were suggested. The additional analyses recommended were conducted by the Cabrillo Port IRA authors in cooperation with Sandia and a technical review panel composed of representatives from the Coast Guard and the California State Lands Commission. The results from the additional analyses improved the understanding and confidence in the potential hazards and consequences to people and property from the proposed Cabrillo Port LNG Deepwater Port Project. The results of the Sandia review, the additional analyses and evaluations conducted, and the resolutions of suggested changes for inclusion in a final Cabrillo Port IRA are summarized in this report.

  1. Acceleration of particles near the inner black hole horizon

    E-Print Network [OSTI]

    O. B. Zaslavskii

    2011-12-16T23:59:59.000Z

    We study the possibility of obtaining unbound energy E_{c.m.} in the centre of mass frame when two particles collide near the inner black hole horizon. We consider two different cases - when both particles move (i) in the same direction or (ii) in the opposite ones. We also discuss two different versions of the effect - whether an infinite energy can be released in the collision (strong version) or the energy E_{c.m.} is finite but can be made as large as one likes (weak version). We demonstrate that the strong version of the effect is impossible in both cases (i) and (ii). In case (i) this is due to the fact that in the situation when E_{c.m.} formally diverges on the horizon, one of particles passes through the bifurcation point where two horizons meet while the second particle does not, so collision does not occur. In case (ii), both particles hit different branches of the horizon. The weak version is possible in both cases, provided at least one of particles starts its motion inside the horizon along the direction of spatial symmetry from infinity.

  2. Nearly extremal apparent horizons in simulations of merging black holes

    E-Print Network [OSTI]

    Geoffrey Lovelace; Mark A. Scheel; Robert Owen; Matthew Giesler; Reza Katebi; Bela Szilagyi; Tony Chu; Nicholas Demos; Daniel A. Hemberger; Lawrence E. Kidder; Harald P. Pfeiffer; Nousha Afshari

    2015-02-27T23:59:59.000Z

    The spin angular momentum $S$ of an isolated Kerr black hole is bounded by the surface area $A$ of its apparent horizon: $8\\pi S \\le A$, with equality for extremal black holes. In this paper, we explore the extremality of individual and common apparent horizons for merging, rapidly spinning binary black holes. We consider simulations of merging black holes with equal masses $M$ and initial spin angular momenta aligned with the orbital angular momentum, including new simulations with spin magnitudes up to $S/M^2 = 0.994$. We measure the area and (using approximate Killing vectors) the spin on the individual and common apparent horizons, finding that the inequality $8\\pi S A$ and for which our lower bound on their Booth-Fairhurst extremality exceeds unity. These superextremal surfaces are always surrounded by marginally outer trapped surfaces (i.e., by apparent horizons) with $8\\pi Shorizon is always less than unity but can exceed the value for an extremal Kerr black hole. (Abstract abbreviated.)

  3. The use of exploration 3D seismic data to optimise oil exploration in OPL 210 deepwater, Nigeria

    SciTech Connect (OSTI)

    Nelson, L.C.; Lilletveit, R.; Sandvoll, T. [Statoil and BP Alliance, Stavanger (Norway)] [and others

    1995-08-01T23:59:59.000Z

    Allied Energy and the Statoil and BP Alliance are currently partners in the OPL 210 license, in deepwater Nigeria. The license has a 5 year initial exploration phase which carries a two well commitment. To optimize the location of these wells in this challenging and costly drilling environment the partnership has decided to acquire extensive exploration 3D seismic data within the block. Interpretation of the first of two planned 3D surveys has led to a much clearer understanding of: (a) The structural segmentation of the prospect and thus a clearer idea of the likely hydrocarbon pool size. (b) The distribution of amplitude anomalies and thus, hopefully, a superior understanding of reservoir distribution and hydrocarbons. Here the limiting factor is clearly the lack of deepwater geophysical calibration, due to the absence of wells. Consequently, conclusions at this stage, are qualitative either than quantative. Combined with detailed seismic stratigraphic and high tech geophysical analysis, these two aspects will assist in the highgrading of segments in the prospect, prior to final decisions on the well locations. The first well, planned for 1995, will be one of the first wells drilled in the Nigerian deepwater area. Examples of both 2D and 3D data will be used to demonstrate the above and some of the first well results will be integrated into our interpretation to highlight how some of our perceptions may have changed.

  4. Directly observing entropy accumulate on the horizon and holography

    E-Print Network [OSTI]

    Ariel Edery; Hugues Beauchesne

    2012-05-15T23:59:59.000Z

    Recent numerical simulations of gravitational collapse show that there exists a special foliation of the spacetime where matter and entropy accumulate directly on the inside of the horizon surface. In this foliation, the time coincides with the proper time of the asymptotic static observer (ASO) and for spherical symmetry, this corresponds to isotropic coordinates. In this gauge, the three-volume in the interior shrinks to zero and only the horizon area remains at the end of collapse. In a different foliation, matter and entropy accumulate in the volume. The entropy is however independent of the foliation. Black hole holography is therefore a mapping from an arbitrary foliation, where information resides in the volume, to the special ASO frame, where it resides directly on the horizon surface.

  5. Thermodynamics of Black Hole Horizons and Kerr/CFT Correspondence

    E-Print Network [OSTI]

    Bin Chen; Shen-xiu Liu; Jia-ju Zhang

    2012-11-02T23:59:59.000Z

    In this paper we investigate the thermodynamics of the inner horizon and its implication on the holographic description of the black hole. We focus on the black holes with two physical horizons. Under reasonable assumption, we prove that the first law of thermodynamics of the outer horizon always indicates that of the inner horizon. As a result, the fact that the area product being mass-independent is equivalent to the relation $T_+S_+=T_-S_-$, with $T_\\pm$ and $S_\\pm$ being the Hawking temperatures and the entropies of the outer and inner horizon respectively. We find that the mass-independence of area product breaks down in general Myers-Perry black holes with spacetime dimension $d\\geq6$ and Kerr-AdS black holes with $d\\geq4$. Moreover we discuss the implication of the first laws of the outer and inner horizons on the thermodynamics of the right- and left-moving sectors of dual CFT in Kerr/CFT correspondence. We show that once the relation $T_+S_+=T_-S_-$ is satisfied, the central charges of two sectors must be same. Furthermore from the thermodynamics relations, we read the dimensionless temperatures of microscopic CFT, which are in exact agreement with the ones obtained from hidden conformal symmetry in the low frequency scattering off the black holes, and then determine the central charges. This method works well in well-known cases in Kerr/CFT correspondence, and reproduce successfully the holographic pictures for 4D Kerr-Newman and 5D Kerr black holes. We go on to predict the central charges and temperatures of a possible holographic CFT description dual to 5D doubly rotating black ring.

  6. Spectral properties of acoustic black hole radiation: Broadening the horizon

    SciTech Connect (OSTI)

    Finazzi, Stefano; Parentani, Renaud [SISSA, via Bonomea 265, Trieste 34151 (Italy) and INFN sezione di Trieste, Via Valerio 2, Trieste 34127 (Italy); Laboratoire de Physique Theorique, CNRS UMR 8627, Batiment 210, Universite Paris-Sud 11, 91405 Orsay Cedex (France)

    2011-04-15T23:59:59.000Z

    The sensitivity of the black hole spectrum when introducing short distance dispersion is studied in the context of atomic Bose condensates. By considering flows characterized by several length scales, we show that, while the spectrum remains remarkably Planckian, the temperature is no longer fixed by the surface gravity. Rather it is determined by the average of the flow gradient across the horizon over an interval fixed by the healing length and the surface gravity, as if the horizon were broadened. This remains valid as long as the flow does not induce nonadiabatic effects that produce oscillations or some parametric amplification of the flux.

  7. Thermodynamics on the apparent horizon in generalized gravity theories

    E-Print Network [OSTI]

    Shao-Feng Wu; Bin Wang; Guo-Hong Yang

    2008-01-17T23:59:59.000Z

    We present a general procedure to construct the first law of thermodynamics on the apparent horizon and illustrate its validity by examining it in some extended gravity theories. Applying this procedure, we can describe the thermodynamics on the apparent horizon in Randall-Sundrum braneworld imbedded in a nontrivial bulk. We discuss the mass-like function which was used to link Friedmann equation to the first law of thermodynamics and obtain its special case which gives the generalized Misner-Sharp mass in Lovelock gravity.

  8. Horizons and Tunneling in the Euclidean False Vacuum

    E-Print Network [OSTI]

    Kate Marvel; Neil Turok

    2007-12-17T23:59:59.000Z

    In the thin-wall approximation, the decay of a gravitating false vacuum to a lower-energy state is affected by the cosmological horizon structure in both spaces. The nucleation radius of a bubble of true vacuum depends on the surface tension of its boundary and equals the false vacuum cosmological horizon at a critical tension. We argue that there is no tunneling instanton solution beyond the critical tension and argue that there is therefore a bound on allowed membrane tension in theories which rely on semiclassical tunneling to relax the cosmological constant.

  9. Dynamics of the Cosmological Apparent Horizon: Surface Gravity & Temperature

    E-Print Network [OSTI]

    Alexis Helou

    2015-02-14T23:59:59.000Z

    In the context of thermodynamics applied to our cosmological apparent horizon, we explicit in greater details our previous work which established the Friedmann Equations from projection of Hayward's Unified First Law. In particular, we show that the dynamical Hayward-Kodama surface gravity is perfectly well-defined and is suitable for this derivation. We then relate this surface gravity to a physical notion of temperature, and show this has constant, positive sign for any kind of past-inner trapping horizons. Hopefully this will clarify the choice of temperature in a dynamical Friedmann-Lema\\^itre-Roberston-Walker spacetime.

  10. Shear Waves, Sound Waves On A Shimmering Horizon

    E-Print Network [OSTI]

    Omid Saremi

    2007-03-19T23:59:59.000Z

    In the context of the so called ``membrane paradigm'' of black holes/branes, it has been known for sometime that the dynamics of small fluctuations on the stretched horizon can be viewed as corresponding to diffusion of a conserved charge in simple fluids. To study shear waves in this context properly, one must define a conserved stress tensor living on the stretched horizon. Then one is required to show that such a stress tensor satisfies the corresponding constitutive relations. These steps are missing in a previous treatment of the shear perturbations by Kovtun, Starinets and Son. In this note, we fill the gap by prescribing the stress tensor on the stretched horizon to be the Brown and York (or Balasubramanian-Kraus (BK) in the AdS/CFT context) holographic stress tensor. We are then able to show that such a conserved stress tensor satisfies the required constitutive relation on the stretched horizon using Einstein equations. We read off the shear viscosity from the constitutive relations in two different channels, shear and sound. We find an expression for the shear viscosity in both channels which are equal, as expected. Our expression is in agreement with a previous membrane paradigm formula reported by Kovtun, Starinets and Son.

  11. Time Horizons of Environmental vs. Non-Environmental Costs

    E-Print Network [OSTI]

    Tovey, Craig A.

    1 1 #12;Time Horizons of Environmental vs. Non-Environmental Costs: Evidence from U.S. Tort Fellowship #12;Abstract One explanation for a positive correlation between environmental and financial differences between environmental and other investment opportunities. One of these systematic differences

  12. Adaptive Receding Horizon Control of a Distributed Collector Solar Field

    E-Print Network [OSTI]

    Sontag, Eduardo

    for a distributed collector solar field which ex- plicitly explores its distributed parameter character. The plant, distributed collector solar fields are repre- sentative of an important class of distributed parameter plantsAdaptive Receding Horizon Control of a Distributed Collector Solar Field J.M. Igreja, J. M. Lemos

  13. SC-RISE LECTURE SERIES BRIGHT HORIZONS IN SOLAR ENERGY

    E-Print Network [OSTI]

    SC-RISE LECTURE SERIES BRIGHT HORIZONS IN SOLAR ENERGY Sustainable Energy Opportunities, Options are being developed including biomass, geothermal, hydropower, ocean thermal energy conversion, solar electric, solar thermal, and wind. However, such aspects as low energy density, siting, and temporal

  14. Soil Horizons Some Noteworthy Soil Science in Wisconsin

    E-Print Network [OSTI]

    Mladenoff, David

    Soil Horizons Some Noteworthy Soil Science in Wisconsin Alfred E. Hartemink The impact and benefits of soil science have only partly been documented. Here I highlight four noteworthy soil science achievements from the state of Wisconsin that took place between 1870 and the early 1980s: (i) the first soil

  15. Seismic Volume Visualization for Horizon Extraction Daniel Patel

    E-Print Network [OSTI]

    present a novel system for rapidly interpret- ing and visualizing seismic volumetric data. First we to seismic data interpretation. Keywords: Seismic interpretation, Seismic horizons, Volume ren- dering hydrocarbons are trapped. In this paper we present a system for rapid interpretation of seismic reflection

  16. Spherical collapse with heat flow and without horizon

    E-Print Network [OSTI]

    A. Banerjee; S. Chatterjee; N. Dadhich

    2002-09-10T23:59:59.000Z

    We present a class of solutions for a heat conducting fluid sphere, which radiates energy during collapse without the appearance of horizon at the boundary at any stage of the collapse. A simple model shows that there is no accumulation of energy due to collapse since it radiates out at the same rate as it is being generated.

  17. Evolution of the horizons for dark energy universe

    E-Print Network [OSTI]

    Ritabrata Biswas; Nairwita Mazumder; Subenoy Chakraborty

    2011-06-12T23:59:59.000Z

    Recent observational evidences of accelerating phase of the universe strongly demand that the dominating matter in the universe is in the form of dark energy. In this work, we study the evolution of the apparent and event horizons for various dark energy models and examine their behavior across phantom barrier line.

  18. Causal temperature profiles in horizon-free collapse

    E-Print Network [OSTI]

    N F Naidu; M Govender

    2005-10-04T23:59:59.000Z

    We investigate the causal temperature profiles in a recent model of a radiating star undergoing dissipative gravitational collapse without the formation of an horizon. It is shown that this simple exact model provides a physically reasonable behaviour for the temperature profile within the framework of extended irreversible thermodynamics.

  19. Horizon Dynamics of Evaporating Black Holes in a Higher Dimensional Inflationary Universe

    E-Print Network [OSTI]

    Manasse Mbonye

    1999-08-19T23:59:59.000Z

    Spherically symmetric Black Holes of the Vaidya type are examined in an asymptotically de Sitter, higher dimensional spacetime. The various horizons are located. The structure and dynamics of such horizons are studied.

  20. Is thermodynamics of the universe bounded by the event horizon a Bekenstein system?

    E-Print Network [OSTI]

    Subenoy Chakraborty

    2012-11-12T23:59:59.000Z

    In this brief communication, we have studied the validity of the first law of thermodynamics for the universe bounded by event horizon with two examples. The key point is the appropriate choice of the temperature on the event horizon. Finally, we have concluded that universe bounded by the event horizon may be a Bekenstein system and the Einstein's equations and the first law of thermodynamics on the event horizons are equivalent.

  1. LE BULLETIN DE L'EPI N 43 LOGICIELS DIDACT, HORIZON, ROSEAU PROPOS DES LOGICIELS

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    141 LE BULLETIN DE L'EPI N° 43 LOGICIELS DIDACT, HORIZON, ROSEAU � PROPOS DES LOGICIELS DIDACT supprimer sur une disquette en unité FL0 les fichiers utilisateurs créés par Didact, Horizon ou Roseau CP BULLETIN DE L'EPI LOGICIELS DIDACT, HORIZON, ROSEAU d) le travail se fait. Noter que pour une deuxième

  2. Connecting horizon pixels and interior voxels of a black hole

    E-Print Network [OSTI]

    Piero Nicolini; Douglas Singleton

    2014-10-03T23:59:59.000Z

    In this paper we discuss to what extent one can infer details of the interior structure of a black hole based on its horizon. Recalling that black hole thermal properties are connected to the non-classical nature of gravity, we circumvent the restrictions of the no hair theorem by postulating that the black hole interior is singularity free due to violations of the usual energy conditions. Further these conditions allow one to establish a one-to-one, holographic projection between Planckian areal "bits" on the horizon and "voxels", representing the gravitational degrees of freedom in the black hole interior. We illustrate the repercussions of this idea by discussing an example of the black hole interior consisting of a de Sitter core postulated to arise from the local graviton quantum vacuum energy. It is shown that the black hole entropy can emerge as the statistical entropy of a gas of voxels.

  3. Horizon effects with surface waves on moving water

    E-Print Network [OSTI]

    Germain Rousseaux; Philippe Maissa; Christian Mathis; Pierre Coullet; Thomas G. Philbin; Ulf Leonhardt

    2010-10-01T23:59:59.000Z

    Surface waves on a stationary flow of water are considered, in a linear model that includes the surface tension of the fluid. The resulting gravity-capillary waves experience a rich array of horizon effects when propagating against the flow. In some cases three horizons (points where the group velocity of the wave reverses) exist for waves with a single laboratory frequency. Some of these effects are familiar in fluid mechanics under the name of wave blocking, but other aspects, in particular waves with negative co-moving frequency and the Hawking effect, were overlooked until surface waves were investigated as examples of analogue gravity [Sch\\"utzhold R and Unruh W G 2002 Phys. Rev. D 66 044019]. A comprehensive presentation of the various horizon effects for gravity-capillary waves is given, with emphasis on the deep water/short wavelength case kh>>1 where many analytical results can be derived. A similarity of the state space of the waves to that of a thermodynamic system is pointed out.

  4. The Obama administration is carrying out an aggressive, comprehensive, coordinated,

    E-Print Network [OSTI]

    officials, and the seafood industry, to closely monitor the effects of the BP Deepwater Horizon oil spill the closure. (continued on back) Gulf Seafood Safety & The BP Deepwater Horizon Oil Spill #12;Sensory Testing

  5. UK Oil and Gas Collaborative Doctoral Training Centre (2014 start) Project Title: Environmental assessment of deep-water sponge fields in relation to oil and gas

    E-Print Network [OSTI]

    Henderson, Gideon

    UK Oil and Gas Collaborative Doctoral Training Centre (2014 start) Project Title: Environmental assessment of deep-water sponge fields in relation to oil and gas activity: a west of Shetland case study industry and government identified sponge grounds in areas of interest to the oil and gas sector

  6. UK Oil and Gas Collaborative Doctoral Training Centre (2014 start) Project Title: Evaluating the resilience of deepwater systems to recover from oil spills

    E-Print Network [OSTI]

    Henderson, Gideon

    UK Oil and Gas Collaborative Doctoral Training Centre (2014 start) Project Title: Evaluating the resilience of deepwater systems to recover from oil spills Host institution: Heriot-Watt University Gatliff (BGS), Jeffrey Polton (NOC), Alejandro Gallego and Eileen Bresnan (MSS). Project description: Oil

  7. Harrison Quick Research Statement, Page 1

    E-Print Network [OSTI]

    Carlin, Bradley P.

    -Censored Airborne Exposure Data from the Deepwater Horizon (BP) Oil Spill As a second-year PhD student

  8. A quantum peek inside the black hole event horizon

    E-Print Network [OSTI]

    Sumanta Chakraborty; Suprit Singh; T. Padmanabhan

    2015-03-14T23:59:59.000Z

    We solve the Klein-Gordon equation for a scalar field, in the background geometry of a dust cloud collapsing to form a black hole, everywhere in the (1+1) spacetime: that is, both inside and outside the event horizon and arbitrarily close to the curvature singularity. This allows us to determine the regularized stress tensor expectation value, everywhere in the appropriate quantum state (viz., the Unruh vacuum) of the field. We use this to study the behaviour of energy density and the flux measured in local inertial frames for the radially freely falling observer at any given event. Outside the black hole, energy density and flux lead to the standard results expected from the Hawking radiation emanating from the black hole, as the collapse proceeds. Inside the collapsing dust ball, the energy densities of both matter and scalar field diverge near the singularity in both (1+1) and (1+3) spacetime dimensions; but the energy density of the field dominates over that of classical matter. In the (1+3) dimensions, the total energy (of both scalar field and classical matter) inside a small spatial volume around the singularity is finite (and goes to zero as the size of the region goes to zero) but the total energy of the quantum field still dominates over that of the classical matter. Inside the event horizon, but \\textit{outside} the collapsing matter, freely falling observers find that the energy density and the flux diverge close to the singularity. In this region, even the integrated energy inside a small spatial volume enclosing the singularity diverges. This result holds in both (1+1) and (1+3) spacetime dimensions with a \\emph{milder} divergence for the total energy inside a small region in (1+3) dimensions. These results suggest that the back-reaction effects are significant even in the region \\emph{outside the matter but inside the event horizon}, close to the singularity.

  9. Complete single-horizon quantum corrected black hole spacetime

    SciTech Connect (OSTI)

    Peltola, Ari; Kunstatter, Gabor [Department of Physics and Winnipeg Institute for Theoretical Physics, University of Winnipeg, 515 Portage Avenue, Winnipeg, Manitoba, R3B 2E9 (Canada)

    2009-03-15T23:59:59.000Z

    We show that a semiclassical polymerization of the interior of Schwarzschild black holes gives rise to a tantalizing candidate for a nonsingular, single-horizon black hole spacetime. The exterior has nonzero quantum stress energy but closely approximates the classical spacetime for macroscopic black holes. The interior exhibits a bounce at a microscopic scale and then expands indefinitely to a Kantowski-Sachs spacetime. Polymerization therefore removes the singularity and produces a scenario reminiscent of past proposals for universe creation via quantum effects inside a black hole.

  10. Horizon City, Texas: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdfGetecGtel Jump to:Pennsylvania: EnergyHopkinsville, Kentucky:Horizon City,

  11. Horizon Wind Energy formerly Zilkha Renewable Energy | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdfGetecGtel Jump to:Pennsylvania: EnergyHopkinsville, Kentucky:Horizon

  12. Horizon Fuel Cell Technologies Pte Ltd | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluatingGroup | Open EnergyInformationHorizon Fuel Cell Technologies Pte Ltd Jump

  13. RESEARCH ARTICLE Open Access A new model for the biodegradation kinetics

    E-Print Network [OSTI]

    Hubbard, Susan

    : application to the Deepwater Horizon oil spill in the Gulf of Mexico Javier Vilcáez1,2,5 , Li Li1 conditions relevant to the Deepwater Horizon oil spill in the Gulf of Mexico. In the model, oil is composed droplets, Size distribution, Shrinking core model, Gulf of Mexico oil spill, Deepwater horizon oil spill

  14. WRITTEN STATEMENT OF DEPUTY CHIEF, ASSESSMENT AND RESTORATION DIVISION

    E-Print Network [OSTI]

    damages resulting from the Deepwater Horizon BP oil spill. My name is Tony Penn and I am the Deputy Chief impacts to the Gulf Coast and the Nation as a whole from the Deepwater Horizon BP oil spill. NOAA is fully HEARING ON ASSESSING NATURAL RESOURCE DAMAGES RESULTING FROM THE BP DEEPWATER HORIZON DISASTER BEFORE

  15. National Oceanic and Atmospheric Administration U.S. Department of Commerce

    E-Print Network [OSTI]

    Response What to Expect in South Florida from the Deepwater Horizon/ BP Oil Spill Has Oil from the Deepwater Horizon/BP Oil Spill Reached South Florida Yet? There have been no confirmed observations of oil from the Deepwater Horizon/BP spill has remained mainly in the north-central Gulf of Mexico, and has impacted

  16. 5/10/10 7:10 AMUntitled Page 1 of 3

    E-Print Network [OSTI]

    Hazen, Terry

    Coast ecosystem in the aftermath of the Deepwater Horizon oil spill, says a Berkeley Lab bioremediation) -- With millions of gallons crude oil being spewed into the Gulf of Mexico from the Deepwater Horizon oil spill to do what they do best." The Deepwater Horizon oil rig leased by energy giant BP that exploded on April

  17. WRITTEN STATEMENT OF DEPUTY CHIEF OF THE ASSESSMENT AND RESTORATION DIVISION

    E-Print Network [OSTI]

    damages resulting from the Deepwater Horizon BP oil spill. My name is Tony Penn, and I am the Deputy Chief in environmental restoration following an oil spill. The Deepwater Horizon BP oil spill, the largest accidental oil HEARING ON ASSESSING NATURAL RESOURCE DAMAGES RESULTING FROM THE BP DEEPWATER HORIZON DISASTER BEFORE

  18. Black hole initial data with a horizon of prescribed intrinsic and extrinsic geometry

    E-Print Network [OSTI]

    Brian Smith

    2010-06-14T23:59:59.000Z

    The purpose of this work is to construct asymptotically flat, time symmetric initial data with an apparent horizon of prescribed intrinsic and extrinsic geometry. To do this, we use the parabolic partial differential equation for prescribing scalar curvature. In this equation the horizon geometry is contained within the freely specifiable part of the metric. This contrasts with the conformal method in which the geometry of the horizon can only be specified up to a conformal factor.

  19. Implementing an apparent-horizon finder in three dimensions

    E-Print Network [OSTI]

    Thomas W. Baumgarte; Gregory B. Cook; Mark A. Scheel; Stuart L. Shapiro; Saul A. Teukolsky

    1996-06-06T23:59:59.000Z

    Locating apparent horizons is not only important for a complete understanding of numerically generated spacetimes, but it may also be a crucial component of the technique for evolving black-hole spacetimes accurately. A scheme proposed by Libson et al., based on expanding the location of the apparent horizon in terms of symmetric trace-free tensors, seems very promising for use with three-dimensional numerical data sets. In this paper, we generalize this scheme and perform a number of code tests to fully calibrate its behavior in black-hole spacetimes similar to those we expect to encounter in solving the binary black-hole coalescence problem. An important aspect of the generalization is that we can compute the symmetric trace-free tensor expansion to any order. This enables us to determine how far we must carry the expansion to achieve results of a desired accuracy. To accomplish this generalization, we describe a new and very convenient set of recurrence relations which apply to symmetric trace-free tensors.

  20. Gas injection as an alternative option for handling associated gas produced from deepwater oil developments in the Gulf of Mexico 

    E-Print Network [OSTI]

    Qian, Yanlin

    2004-09-30T23:59:59.000Z

    associated gas. This project was designed to test the viability of storing associated gas in a saline sandstone aquifer above the producing horizon. Saline aquifer storage would have the dual benefits of gas emissions reduction and gas storage for future use...

  1. Annual Report: EPAct Complementary Program's Ultra-Deepwater R&D Portfolio and Unconventional Resources R&D Portfolio (30 September 2012)

    SciTech Connect (OSTI)

    none,; Rose, Kelly [NETL] [NETL; Hakala, Alexandra [NETL] [NETL; Guthrie, George [NETL] [NETL

    2012-09-30T23:59:59.000Z

    This report summarizes FY13 research activities performed by the National Energy Technology Laboratory (NETL), Office of Research and Development (ORD), along with its partners in the Regional University Alliance (RUA) to fulfill research needs under the Energy Policy Act of 2005 (EPAct) Section 999?s Complementary Program. Title IX, Subtitle J, Section 999A(d) of EPAct 2005 authorizes $50 million per year of federal oil and gas royalties, rents and bonus payments for an oil and natural gas research and development effort, the Ultra-Deepwater and Unconventional Natural Gas and Other Petroleum Resources Research Program. Section 999 further prescribes four program elements for the effort, one of which is the Complementary Research Program that is to be performed by NETL. This document lays out the plan for the research portfolio for the Complementary Research Program, with an emphasis on the 2013 funding. The Complementary Program consists of two research portfolios focused on domestic resources: (1) the Deepwater and Ultra-Deepwater Portfolio (UDW) (focused on hydrocarbons in reservoirs in extreme environments) and (2) the Unconventional Resources Portfolio (UCR) (focused on hydrocarbons in shale reservoirs). These two portfolios address the science base that enables these domestic resources to be produced responsibly, informing both regulators and operators. NETL is relying on a core Department of Energy-National Energy Technology Laboratory (DOE-NETL) competency in engineered-natural systems to develop this science base, allowing leveraging of decades of investment. NETL?s Complementary Research Program research portfolios support the development of unbiased research and information for policymakers and the public, performing rapid predictions of possible outcomes associated with unexpected events, and carrying out quantitative assessments for energy policy stakeholders that accurately integrate the risks of safety and environmental impacts. The objective of this body of work is to build the scientific understanding and assessment tools necessary to develop the confidence that key domestic oil and gas resources can be produced safely and in an environmentally sustainable way. For the Deepwater and Ultra-Deepwater Portfolio, the general objective is to develop a scientific base for predicting and quantifying potential risks associated with exploration and production in extreme offshore environments. This includes: (1) using experimental studies to improve understanding of key parameters (e.g., properties and behavior of materials) tied to loss-of-control events in deepwater settings, (2) compiling data on spatial variability for key properties used to characterize and simulate the natural and engineered components involved in extreme offshore settings, and (3) utilizing findings from (1) and (2) in conjunction with integrated assessment models to model worst-case scenarios, as well as assessments of most likely scenarios relative to potential risks associated with flow assurance and loss of control. This portfolio and approach is responsive to key Federal-scale initiatives including the Ocean Energy Safety Advisory Committee (OESC). In particular, the findings and recommendations of the OESC?s Spill Prevention Subcommittee are addressed by aspects of the Complementary Program research. The Deepwater and Ultra-Deepwater Portfolio is also aligned with some of the goals of the United States- Department of the Interior (US-DOI) led Alaska Interagency Working Group (AIWG) which brings together state, federal, and tribal government personnel in relation to energy-related issues and needs in the Alaskan Arctic. For the Unconventional Fossil Resources Portfolio, the general objective is to develop a sufficient scientific base for predicting and quantifying potential risks associated with the oil/gas resources in shale reservoirs that require hydraulic fracturing and/or other engineering measures to produce. The major areas of focus include: (1) improving predictions of fugitive methane and greenhouse gas emissions, (2) pr

  2. Offset-free Receding Horizon Control of Constrained Linear Systems subject to

    E-Print Network [OSTI]

    Cambridge, University of

    Offset-free Receding Horizon Control of Constrained Linear Systems subject to Time/F-INFENG/TR.468 November 4, 2003 #12;Offset-free Receding Horizon Control of Constrained Linear Systems subject and offset-free control of con- strained, linear time-invariant systems in the presence of time

  3. Pressure Solution: Possible Mechanism for Silicate Grain Dissolution in a Petrocalcic Horizon

    E-Print Network [OSTI]

    Ahmad, Sajjad

    Pressure Solution: Possible Mechanism for Silicate Grain Dissolution in a Petrocalcic Horizon H in southern New Mexico, up to 58% of the silicate grains have dissolution fea- tures, such as embayed-solution mechanism in the petrocaIcic horizon: (i) silicate grains are smooth where they contact pores, but serrated

  4. Managerial Incentive Horizons and the Quality of Firms' Information Environments Jianxin (Daniel) Chi

    E-Print Network [OSTI]

    in the short-term speculative component of the stock price. Current shareholders benefit from the option` information environments. When a firm`s managerial incentive horizon is short, it is more likely to report are consistent with the hypothesis that short incentive horizons induce managers to adopt strategies that reduce

  5. Statistics of black hole radiance and the horizon area spectrum

    E-Print Network [OSTI]

    Bekenstein, Jacob D

    2015-01-01T23:59:59.000Z

    The statistical response of a Kerr black hole to incoming quantum radiation has heretofore been studied by the methods of maximum entropy or quantum field theory in curved spacetime. Neither approach pretends to take into account the quantum structure of the black hole itself. To address this last issue we calculate here the conditional probability distribution associated with the hole's response by assuming that the horizon area has a discrete quantum spectrum, and that its quantum evolution corresponds to jumps between adjacent area eigenvalues, possibly occurring in series, with consequent emission or absorption of quanta, possibly in the same mode. This "atomic" model of the black hole is implemented in two different ways and recovers the previously calculated radiation statistics in both cases. The corresponding conditional probably distribution is here expressed in closed form in terms of an hypergeometric function.

  6. Lithophysal Rock Mass Mechanical Properties of the Repository Host Horizon

    SciTech Connect (OSTI)

    D. Rigby

    2004-11-10T23:59:59.000Z

    The purpose of this calculation is to develop estimates of key mechanical properties for the lithophysal rock masses of the Topopah Spring Tuff (Tpt) within the repository host horizon, including their uncertainties and spatial variability. The mechanical properties to be characterized include an elastic parameter, Young's modulus, and a strength parameter, uniaxial compressive strength. Since lithophysal porosity is used as a surrogate property to develop the distributions of the mechanical properties, an estimate of the distribution of lithophysal porosity is also developed. The resulting characterizations of rock parameters are important for supporting the subsurface design, developing the preclosure safety analysis, and assessing the postclosure performance of the repository (e.g., drift degradation and modeling of rockfall impacts on engineered barrier system components).

  7. Thermodynamics of Evolving Lorentzian Wormhole at Apparent and Event Horizons

    E-Print Network [OSTI]

    Ujjal Debnath; Mubasher Jamil; R. Myrzakulov; M. Akbar

    2012-04-06T23:59:59.000Z

    We have investigated the non-static Lorentzian Wormhole model in presence of anisotropic pressure. We have presented some exact solutions of Einstein equations for anisotropic pressure case. Introducing two EoS parameters we have shown that these solutions give very rich dynamics of the universe yielding to the different expansion history of it in the $r$ - direction and in the $T$ - direction. The corresponding explicit forms of the shape function $b(r)$ is presented.We have shown that the Einstein's field equations and unified first law are equivalent for the dynamical wormhole model. The first law of thermodynamics has been derived by using the Unified first law. The physical quantities including surface gravity and the temperature are derived for the wormhole. Here we have obtained all the results without any choice of the shape function. The validity of generalized second law (GSL) of thermodynamics has been examined at apparent and event horizons for the evolving Lorentzian wormhole.

  8. Dual-Sampling-Rate Moving Horizon Control of a Class of Linear Systems with Input Saturation and

    E-Print Network [OSTI]

    Dual-Sampling-Rate Moving Horizon Control of a Class of Linear Systems with Input Saturation horizon control scheme for a class of linear, continuous-time plants with strict input saturation horizon control, robust, fast sampling, stability, linear sys- tems, input constraints 1 Introduction

  9. hal-00144535,version1-3May2007 Cosmological energy in a thermo-horizon and the

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    the first law and the definition of the total energy contained inside the horizon. This contradiction, 8] and the definition of the energy contained inside the horizon, independently of the choice from the first law and the definition of the energy inside the horizon. We then show

  10. Dynamic Vehicle Routing for Translating Demands: Stability Analysis and Receding-Horizon Policies

    E-Print Network [OSTI]

    Bopardikar, Shaunak D.

    We introduce a problem in which demands arrive stochastically on a line segment, and upon arrival, move with a fixed velocity perpendicular to the segment. We design a receding horizon service policy for a vehicle with ...

  11. Vacuum non-expanding horizons and shear-free null geodesic congruences

    E-Print Network [OSTI]

    T. M. Adamo; E. T. Newman

    2009-08-05T23:59:59.000Z

    We investigate the geometry of a particular class of null surfaces in space-time called vacuum Non-Expanding Horizons (NEHs). Using the spin-coefficient equation, we provide a complete description of the horizon geometry, as well as fixing a canonical choice of null tetrad and coordinates on a NEH. By looking for particular classes of null geodesic congruences which live exterior to NEHs but have the special property that their shear vanishes at the intersection with the horizon, a good cut formalism for NEHs is developed which closely mirrors asymptotic theory. In particular, we show that such null geodesic congruences are generated by arbitrary choice of a complex world-line in a complex four dimensional space, each such choice induces a CR structure on the horizon, and a particular world-line (and hence CR structure) may be chosen by transforming to a privileged tetrad frame.

  12. Expanding Research Horizons: USDA Forest Service Initiative for Developing Recycled Paper Technology

    E-Print Network [OSTI]

    Abubakr, Said

    Forest Service research on recycling is being led by scientists at the Forest Products Laboratory (FPLExpanding Research Horizons: USDA Forest Service Initiative for Developing Recycled Paper Technology Theodore L. Laufenberg, Program Manager Forest Products Conservation and Recycling Said Abubakr

  13. Horizon Mechanics and Asymptotic Symmetries with a Immirzi-like Parameter in 2+1 Dimensions

    E-Print Network [OSTI]

    Rudranil Basu; Ayan Chatterjee

    2011-04-06T23:59:59.000Z

    Starting with a generalized theory of 2+1 gravity containing an Immirzi like parameter, we derive the modified laws of black hole mechanics using the formalism of weak isolated horizons. Definitions of horizon mass and angular momentum emerge naturally in this framework. We further go on to analyze the asymptotic symmetries, as first discussed by Brown and Henneaux, and analyze their implications in a completely covariant phase space framework.

  14. Tunneling into black hole, escape from black hole, reflection from horizon and pair creation

    E-Print Network [OSTI]

    V. V. Flambaum

    2004-08-05T23:59:59.000Z

    Within classical general relativity, a particle cannot reach the horizon of a black hole during a finite time, in the reference frame of an external observer; a particle inside cannot escape from a black hole; and the horizon does not produce any reflection. We argue that these processes may possibly be allowed in the quantum world. It is known that quantum mechanics allows pair creation at the horizon (one particle inside, another particle outside) and Hawking radiation. One can extend this idea to propose other processes. Tunneling of an external particle inside black hole may be produced by the creation of a pair at the horizon, followed by the annihilation of one created particle with the initial particle outside, with the other created particle appearing inside. Escape of a particle from a black hole may result from the creation of a pair, followed by the annihilation of one created particle with the particle inside, with the other created particle appearing outside. The escape may allow the transfer of information to the outside.Finally, the reflection of an external particle from the horizon may be modelled by a combination of the two processes presented above. The relationship between these "pair creation-annihilation'' mechanisms and the "horizon tunneling" calculations [1-5] is discussed.

  15. Thermal Conductivity of the Potential Repository Horizon Model Report

    SciTech Connect (OSTI)

    J. Ramsey

    2002-08-29T23:59:59.000Z

    The purpose of this report is to assess the spatial variability and uncertainty of thermal conductivity in the host horizon for the proposed repository at Yucca Mountain. More specifically, the lithostratigraphic units studied are located within the Topopah Spring Tuff (Tpt) and consist of the upper lithophysal zone (Tptpul), the middle nonlithophysal zone (Tptpmn), the lower lithophysal zone (Tptpll), and the lower nonlithophysal zone (Tptpln). The Tptpul is the layer directly above the repository host layers, which consist of the Tptpmn, Tptpll, and the Tptpln. Current design plans indicate that the largest portion of the repository will be excavated in the Tptpll (Board et al. 2002 [157756]). The main distinguishing characteristic among the lithophysal and nonlithophysal units is the percentage of large scale (cm-m) voids within the rock. The Tptpul and Tptpll, as their names suggest, have a higher percentage of lithophysae than the Tptpmn and the Tptpln. Understanding the influence of the lithophysae is of great importance to understanding bulk thermal conductivity and perhaps repository system performance as well. To assess the spatial variability and uncertainty of thermal conductivity, a model is proposed that is functionally dependent on the volume fraction of lithophysae and the thermal conductivity of the matrix portion of the rock. In this model, void space characterized as lithophysae is assumed to be air-saturated under all conditions, while void space characterized as matrix may be either water- or air-saturated. Lithophysae are assumed to be air-saturated under all conditions since the units being studied are all located above the water table in the region of interest, and the relatively strong capillary forces of the matrix will, under most conditions, preferentially retain any moisture present in the rock.

  16. Subscriber access provided by -UC Berkeley Library Environmental Science & Technology is published by the American Chemical Society.

    E-Print Network [OSTI]

    Hazen, Terry

    of the BP Deepwater Horizon Spill in the Gulf of Mexico. Abstract The devastating environmental impacts and BP Deepwater Horizon oil spills. Introduction to Biodegradation of Petroleum Hydrocarbons Petroleum of the Exxon Valdez spill in 1989 and its media notoriety made it a frequent comparison to the BP Deepwater

  17. Damning study blames BP oil spill for heart

    E-Print Network [OSTI]

    Grosell, Martin

    Damning study blames BP oil spill for heart defects in fish Scientists find evidence of Deepwater in Louisiana were experiencing lung diseases and low birthrates in the wake of the Deepwater Horizon oil spill to Deepwater Horizon oil samples at environmental conditions that matched those of the spill. Fish

  18. A concrete anti-de Sitter black hole with dynamical horizon having toroidal cross-sections and its characteristics

    E-Print Network [OSTI]

    Pouria Dadras; J. T. Firouzjaee; Reza Mansouri

    2012-11-12T23:59:59.000Z

    We propose a special solution of Einstein equations in the general Vaidya form representing a dynamical black hole having horizon cross-sections with toroidal topology. The concrete model enables us to study for the first time dynamical horizons with toroidal topology, its area law, and the question of matter flux inside the horizon, without using a cut-and-paste technology to construct the solution.

  19. The application of seismic stratigraphic methods on exploration 3D seismic data to define a reservoir model in OPL 210, Deepwater Nigeria

    SciTech Connect (OSTI)

    Ragnhild, L.; Ventris, P. [Statoil and BP Alliance, Stavanger (Norway); Osahon, G. [Allied Energy Resources (Nig) Ltd., Lagos (Nigeria)

    1995-08-01T23:59:59.000Z

    OPL 210 lies in deepwater on the northwestern flank of the Niger Delta. The partners in this block are Allied Energy and The Statoil and BP Alliance. The license has a 5 year initial exploration phase and carries a 2 well commitment. At present the database comprises a 1 x 1 km grid of 2D seismic across the block, and 450 sq. km of 3D in an area of special interest. A larger 3D survey is planned for 1995. Little is known about the reservoir in the deep water, but we expect our main target to be ponded slope and basin turbidites. As such the bulk of the shelf well data available has little or no relevance to the play type likely to be encountered. Prior to drilling, seismic stratigraphy has been one of several methods used to generate a consistent predictive reservoir model. The excellent quality and high resolution of the 3D data have allowed identification and detailed description of several distinctive seismic facies. These facies are described in terms of their internal geometries and stacking patterns. The geometries are then interpreted based on a knowledge of depositional processes from analog slope settings. This enables a predictive model to be constructed for the distribution of reservoir within the observed facies. These predictions will be tested by one of the first wells drilled in the Nigerian deepwater in mid 1995.

  20. Anyonic statistics and large horizon diffeomorphisms for Loop Quantum Gravity Black Holes

    E-Print Network [OSTI]

    Andreas G. A. Pithis; Hans-Christian Ruiz Euler

    2015-03-24T23:59:59.000Z

    We investigate the role played by large diffeomorphisms of quantum Isolated Horizons for the statistics of LQG Black Holes by means of their relation to the braid group. To this aim the symmetries of Chern-Simons theory are recapitulated with particular regard to the aforementioned type of diffeomorphisms. For the punctured spherical horizon, these are elements of the mapping class group of $S^2$, which is almost isomorphic to a corresponding braid group on this particular manifold. The mutual exchange of quantum entities in two dimensions is achieved by the braid group, rendering the statistics anyonic. With this we argue that the quantum Isolated Horizon model of LQG based on $SU(2)_k$-Chern-Simons theory explicitly exhibits non-abelian anyonic statistics. In this way a connection to the theory behind the fractional quantum Hall effect and that of topological quantum computation is established, where non-abelian anyons play a significant role.

  1. Condensation of an ideal gas with intermediate statistics on the horizon

    E-Print Network [OSTI]

    Somayeh Zare; Zahra Raissi; Hosein Mohammadzadeh; Behrouz Mirza

    2012-09-22T23:59:59.000Z

    We consider a boson gas on the stretched horizon of the Schwartzschild and Kerr black holes. It is shown that the gas is in a Bose-Einstein condensed state with the Hawking temperature $T_c=T_H$ if the particle number of the system be equal to the number of quantum bits of space-time $ N \\simeq {A}/{{\\l_{p}}^{2}}$. Entropy of the gas is proportional to the area of the horizon $(A)$ by construction. For a more realistic model of quantum degrees of freedom on the horizon, we should presumably consider interacting bosons (gravitons). An ideal gas with intermediate statistics could be considered as an effective theory for interacting bosons. This analysis shows that we may obtain a correct entropy just by a suitable choice of parameter in the intermediate statistics.

  2. Wave Properties of Plasma Surrounding the Event Horizon of a Non-Rotating Black Hole

    E-Print Network [OSTI]

    M. Sharif; G. Mustafa

    2008-09-09T23:59:59.000Z

    We have studied the wave properties of the cold and isothermal plasma in the vicinity of the Schwarzschild black hole event horizon. The Fourier analyzed perturbed 3+1 GRMHD equations are taken on the basis of which the complex dispersion relations are obtained for non-rotating, rotating non-magnetized and rotating magnetized backgrounds. The propagation and attenuation vectors along with the refractive index are obtained (shown in graphs) to study the dispersive properties of the medium near the event horizon. The results show that no information can be obtained from the Schwarzschild magnetosphere. Further, the pressure ceases the existence of normal dispersion of waves.

  3. Shenanigans at the black hole horizon: pair creation or Boulware accretion?

    E-Print Network [OSTI]

    Israel, Werner

    2015-01-01T23:59:59.000Z

    The current scenario of black hole evaporation holds that the Hawking energy flux $F$ is powered by pair creation at the horizon. However, pair creation produces entanglements, some of which must necessarily be broken before the black hole evaporates completely. That leads to loss of information and violation of unitarity. In this paper, an alternative scenario is suggested that reproduces the essential features of Hawking evaporation, but does not invoke pair creation with its attendant problems. In this "accreting Boulware" scenario, a positive flux $F$ is still an outflux at infinity, but near the horizon it becomes an influx of negative energy. This negative energy flux (marginally) satisfies the Flanagan energy inequality.

  4. New Horizons Science Photos from NASA's Pluto-Kuiper Belt Mission

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

    DOE provided the power supply for NASA's New Horizons Mission, a mission to the Pluto and Charon, a double-planet system, and the Kuiper Belt. There are 61 science photos posted on the New Horizons website, along with mission photos, spacecraft images, launch photos, posters and renderings that are both scientific and artistic. Dates range from June of 2006 to February of 2008. The images can be searched by keywords, by date, or by subject topic. They can also be browsed as an entire list. Each image has a detailed description.

  5. Thermodynamics of Evolving Lorentzian Wormholes at Apparent Horizon in $f(R)$ Theory of Gravity

    E-Print Network [OSTI]

    H. Saiedi

    2014-09-08T23:59:59.000Z

    In the context of modified $f(R)$ gravity, we attempt to study the thermodynamic properties of the evolving Lorentzian wormholes at the apparent horizon. It is shown that the wormhole can be derived from a particular $f(R)$ model in the radiation background. Moreover, it has been shown that the field equations can be cast to a similar form $dE = TdS + WdV + Td\\bar{S}$ at the apparent horizon for the evolving Lorentzian wormhole. Compared to the case of Einstein's general relativity, an additional term $Td\\bar{S}$ appears here.

  6. Trade-Offs Between Precision and Computation Horizon in Real-Time Optimal Control of Switched Systems

    E-Print Network [OSTI]

    Egerstedt, Magnus

    Trade-Offs Between Precision and Computation Horizon in Real-Time Optimal Control of Switched computational resources available in many real-time applications, questions concerning trade-offs between the computation horizon and the precision of the solution arise naturally. These trade-offs constitute the main

  7. DualSamplingRate Moving Horizon Control of a Class of Linear Systems with Input Saturation and Plant Uncertainty --

    E-Print Network [OSTI]

    Dual­Sampling­Rate Moving Horizon Control of a Class of Linear Systems with Input Saturation­sampling­rate moving horizon control scheme for a class of linear, continuous­time plants with strict input saturation, it is not computed by a simple linear feedback law, but as a solution of an optimal control problem. As a result

  8. Draft Horizon 2020 Work Programme 2014-2015 in the area of health, demographic change and wellbeing

    E-Print Network [OSTI]

    Greifswald, Ernst-Moritz-Arndt-Universität

    and wellbeing PART 8 - Page 2 of 96 Personalising health and care19 11 2013 Draft Horizon 2020 Work Programme 2014-2015 in the area of health, demographic change of the content of this document. #12;HORIZON 2020 ­ WORK PROGRAMME 2014-2015 Health, demographic change

  9. Giannini Foundation of Agricultural Economics New Horizons for Rural Reform in China

    E-Print Network [OSTI]

    Kammen, Daniel M.

    11 Giannini Foundation of Agricultural Economics New Horizons for Rural Reform in China: Resources a reform agenda to alleviate rural poverty and improve environmental sustainability in China. It focuses on labor reform, suggesting reductions in the work week and providing incentives aimed at encouraging exit

  10. Receding-horizon Supervisory Control of Green Buildings Truong X. Nghiem, George J. Pappas

    E-Print Network [OSTI]

    Pappas, George J.

    .S. Department of Energy. Consequently, there has been a growing interest in green buildings, i.e., energy]). For this reason, green buildings (i.e., energy-efficient buildings) have been of strong interest not onlyReceding-horizon Supervisory Control of Green Buildings Truong X. Nghiem, George J. Pappas

  11. Renormalized Vacuum Polarization on the Horizon of a Schwarzschild Black Hole Threaded by a Cosmic String

    E-Print Network [OSTI]

    Adrian Ottewill; Peter Taylor

    2010-06-30T23:59:59.000Z

    We obtain an analytic expression for the vacuum polarization on the horizon of the Schwarzschild black hole threaded by an infinite cosmic string. This calculation relies on a generalized Heine identity for Legendre functions which we derive without using specific properties of the Legendre functions themselves.

  12. Offset-free Receding Horizon Control of Constrained Linear Gabriele Pannocchia1 Eric C. Kerrigan2

    E-Print Network [OSTI]

    Cambridge, University of

    Offset-free Receding Horizon Control of Constrained Linear Systems Gabriele Pannocchia1 Eric C stability and offset-free control of constrained linear systems in the presence of time-varying setpoints-free controller and computing an appropriate domain of attraction for this controller. The linear (unconstrained

  13. Analysis of Unconstrained Nonlinear MPC Schemes with Time Varying Control Horizon

    E-Print Network [OSTI]

    Knobloch,Jürgen

    ) has become a well-established method for optimal control of linear and nonlinear systems, see, e state, a finite horizon optimal control problem is solved and the first element (or sometimes also more) of the resulting optimal control sequence is used as input for the next sampling interval(s). This procedure

  14. Dynamic Pricing Strategies under a Finite Time Horizon Joan Morris DiMicco

    E-Print Network [OSTI]

    to scalpers. Cost has been perhaps the greatest factor precluding the widespread use of dynamic pricing goods, but in digital markets, the costs associated with making frequent, instantaneous price changesDynamic Pricing Strategies under a Finite Time Horizon Joan Morris DiMicco MIT Media Laboratory 20

  15. Dark Clouds on the Horizon: Using Cloud Storage as Attack Vector and Online Slack Space

    E-Print Network [OSTI]

    Dark Clouds on the Horizon: Using Cloud Storage as Attack Vector and Online Slack Space Martin this as online slack space. We conclude by discussing security improvements for mod- ern online storage services protocol. With the advent of cloud computing and the shared usage of resources, these centralized storage

  16. An Experimental Study of Stabilizing Receding Horizon Control of Visual Feedback System with Planar Manipulators

    E-Print Network [OSTI]

    manipulator with a camera. The behavior of receding horizon control is almost same as inverse optimal control proposed a Lyapunov based visual feedback control with a planar manipulator [6]. Recently, the inverse cost are given by the control Lyapunov function. The inverse optimal control for the planar manipulator

  17. A problem of hypothetical emerging of matter objects on horizon in the standard model of universe

    E-Print Network [OSTI]

    V. Skalsky

    2000-09-25T23:59:59.000Z

    In the standard model of universe the increase in mass of our observed expansive Universe is explained by the assumption of emerging the matter objects on the horizon (of the most remote visibility). However, the physical analysis of the influence of this assumption on the velocity of matter objects shows unambiguously that this hypothetical assumption contradicts the theory of gravity.

  18. Multi-horizon solar radiation forecasting for Mediterranean locations using time series models

    E-Print Network [OSTI]

    Voyant, Cyril; Muselli, Marc; Nivet, Marie Laure

    2013-01-01T23:59:59.000Z

    Considering the grid manager's point of view, needs in terms of prediction of intermittent energy like the photovoltaic resource can be distinguished according to the considered horizon: following days (d+1, d+2 and d+3), next day by hourly step (h+24), next hour (h+1) and next few minutes (m+5 e.g.). Through this work, we have identified methodologies using time series models for the prediction horizon of global radiation and photovoltaic power. What we present here is a comparison of different predictors developed and tested to propose a hierarchy. For horizons d+1 and h+1, without advanced ad hoc time series pre-processing (stationarity) we find it is not easy to differentiate between autoregressive moving average (ARMA) and multilayer perceptron (MLP). However we observed that using exogenous variables improves significantly the results for MLP . We have shown that the MLP were more adapted for horizons h+24 and m+5. In summary, our results are complementary and improve the existing prediction techniques ...

  19. WHEN GLACIERS BREAK THE ICE BETWEEN SEVERAL SCIENTIFIC HORIZONS T. Landes, P. Grussenmeyer, M. Koehl

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    WHEN GLACIERS BREAK THE ICE BETWEEN SEVERAL SCIENTIFIC HORIZONS T. Landes, P. Grussenmeyer, M temperate glacier activity. For this ambitious purpose, it was necessary to reassemble specialists coming glaciers was a unique opportunity for the MAP-PAGE team, specialized in geodetic surveying and imaging

  20. Proof of linear instability of the Reissner-Nordström Cauchy horizon under scalar perturbations

    E-Print Network [OSTI]

    Jonathan Luk; Sung-Jin Oh

    2015-01-19T23:59:59.000Z

    It has long been suggested that solutions to linear scalar wave equation $$\\Box_g\\phi=0$$ on a fixed subextremal Reissner-Nordstr\\"om spacetime with non-vanishing charge are generically singular at the Cauchy horizon. We prove that generic smooth and compactly supported initial data on a Cauchy hypersurface indeed give rise to solutions with infinite nondegenerate energy near the Cauchy horizon in the interior of the black hole. In particular, the solution generically does not belong to $W^{1,2}_{loc}$. This instability is related to the celebrated blue shift effect in the interior of the black hole. The problem is motivated by the strong cosmic censorship conjecture and it is expected that for the full nonlinear Einstein-Maxwell system, this instability leads to a singular Cauchy horizon for generic small perturbations of Reissner-Nordstr\\"om spacetime. Moreover, in addition to the instability result, we also show as a consequence of the proof that Price's law decay is generically sharp along the event horizon.

  1. Soil animal communities in holm oak forests: influence of horizon, altitude and year

    E-Print Network [OSTI]

    Boyer, Edmond

    1 Soil animal communities in holm oak forests: influence of horizon, altitude and year Nassima-francois.ponge@wanadoo.fr Running title: Soil animals in holm oak forests hal-00498459,version1-7Jul2010 Author manuscript, published in "European Journal of Soil Biology 39, 4 (2003) 197-207" DOI : 10.1016/j.ejsobi.2003.06.001 #12

  2. Optimal investment on finite horizon with random discrete order flow in illiquid markets

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    both on trading and observation of the assets. For example, in power markets, trading occurs through at any time but trading occurs more frequently near a terminal horizon. The investor can observe and trade the risky asset only at exogenous random times corresponding to the order flow given

  3. Navier-Stokes on Black Hole Horizons and DC Thermoelectric Conductivity

    E-Print Network [OSTI]

    Aristomenis Donos; Jerome P. Gauntlett

    2015-06-04T23:59:59.000Z

    We consider a general class of black hole solutions of Einstein-Maxwell theory which are holographically dual to CFTs with spatially dependent sources. We show that an averaged DC thermoelectric conductivity matrix can be obtained by solving the forced, linearised, time-independent Navier-Stokes equations on the black hole horizon for an incompressible and charged fluid.

  4. Navier-Stokes on Black Hole Horizons and DC Thermoelectric Conductivity

    E-Print Network [OSTI]

    Donos, Aristomenis

    2015-01-01T23:59:59.000Z

    We consider a general class of black hole solutions of Einstein-Maxwell theory which are holographically dual to CFTs with spatially dependent sources. We show that an averaged DC thermoelectric conductivity matrix can be obtained by solving the forced, linearised, time-independent Navier-Stokes equations on the black hole horizon for an incompressible and charged fluid.

  5. Decay of correlations for flows with unbounded roof function, including the infinite horizon planar

    E-Print Network [OSTI]

    Decay of correlations for flows with unbounded roof function, including the infinite horizon planar for studying nonuniformly hyperbolic flows with unbounded roof functions. In particular, we establish the decay of other classes of flows with unbounded roof functions. For geometric Lorenz attractors (in- cluding

  6. Decay of correlations for flows with unbounded roof function, including the infinite horizon planar

    E-Print Network [OSTI]

    Decay of correlations for flows with unbounded roof function, including the infinite horizon planar for studying nonuniformly hyperbolic flows with unbounded roof functions. In particular, we establish the decay of other classes of flows with unbounded roof functions. For geometric Lorenz attractors (in­ cluding

  7. The stability of Killing-Cauchy horizons in colliding plane wave space-times

    E-Print Network [OSTI]

    J. B. Griffiths

    2005-01-05T23:59:59.000Z

    It is confirmed rigorously that the Killing-Cauchy horizons, which sometimes occur in space-times representing the collision and subsequent interaction of plane gravitational waves in a Minkowski background, are unstable with respect to bounded perturbations of the initial waves, at least for the case in which the initial waves have constant aligned polarizations.

  8. Many Task Computing for Modeling the Fate of Oil Discharged from the Deep Water Horizon Well

    E-Print Network [OSTI]

    tons of crude oil into the Gulf of Mexico. In order to understand the fate and impact of the discharged, causing the riser pipe to rupture and crude oil to flow into the Gulf of Mexico from an approximate depthMany Task Computing for Modeling the Fate of Oil Discharged from the Deep Water Horizon Well

  9. Characterization of Doppler Effects in the Context of Over-the-Horizon Radar

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Characterization of Doppler Effects in the Context of Over-the-Horizon Radar Cornel Ioana Grenoble addresses the problem of the characterization of Doppler effect of maneuvering targets in the context reveals the Doppler effects characterizing the target's trajectory. Analysis of such signals

  10. WRITTEN STATEMENT OF DR. LARRY ROBINSON

    E-Print Network [OSTI]

    .S. DEPARTMENT OF COMMERCE HEARING ON THE USE OF DISPERSANT FOR THE BP DEEPWATER HORIZON OIL SPILL BEFORE in the Deepwater Horizon BP oil spill response and the use of dispersants. My name is Dr. Larry Robinson and I am Horizon oil spill, for which BP is a responsible party; NOAA's role in use of dispersants

  11. WRITTEN STATEMENT OF DAVID WESTERHOLM

    E-Print Network [OSTI]

    OF DISPERSANT FOR THE DEEPWATER HORIZON BP OIL SPILL BEFORE THE COMMITTEE ON ENVIRONMENT AND PUBLIC WORKS UNITED in the Deepwater Horizon BP oil spill response and the use of dispersants. My name is David Westerholm and I am Horizon oil spill, for which BP is a responsible party; NOAA's role in use of dispersants

  12. New Horizons in Earth Reinforcement Otani, Miyata & Mukunoki (eds) 2008 Taylor & Francis Group, London, ISBN 978-0-415-45775-0

    E-Print Network [OSTI]

    Zornberg, Jorge G.

    , London, ISBN 978-0-415-45775-0 New horizons in reinforced soil technology J.G. Zornberg The University

  13. arthropod exposed female: Topics by E-print Network

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

    and Recovery of Salt Marsh Arthropod Communities following BP Deepwater Horizon Oil Spill Environmental Sciences and Ecology Websites Summary: .S. Gulf of Mexico is a hub...

  14. arthropod taxa conditions: Topics by E-print Network

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

    and Recovery of Salt Marsh Arthropod Communities following BP Deepwater Horizon Oil Spill Environmental Sciences and Ecology Websites Summary: .S. Gulf of Mexico is a hub...

  15. arthropod antiviral response: Topics by E-print Network

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

    and Recovery of Salt Marsh Arthropod Communities following BP Deepwater Horizon Oil Spill Environmental Sciences and Ecology Websites Summary: .S. Gulf of Mexico is a hub...

  16. Richard Lazarus Named as Executive Director of National Commission...

    Office of Environmental Management (EM)

    Lazarus Named as Executive Director of National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling Richard Lazarus Named as Executive Director of National...

  17. Key Events Timeline

    Broader source: Energy.gov [DOE]

    This document lists key events beginning with the April 20 fire on the Deepwater Horizon through July 28th. Updated July 28, 2010.

  18. UNIVERSITY OF UTAH, S.J. QUINNEY LAW LIBRARY MONTHLY NEW ACQUISITIONS LIST

    E-Print Network [OSTI]

    Capecchi, Mario R.

    2011] KF1524.6 .L468 2011 BP DEEPWATER HORIZON EXPLOSION AND OIL SPILL, 2010. 5.Lehner, Peter. In deep

  19. String-theoretic breakdown of effective field theory near black hole horizons

    E-Print Network [OSTI]

    Dodelson, Matthew

    2015-01-01T23:59:59.000Z

    We investigate the validity of the equivalence principle near horizons in string theory, analyzing the breakdown of effective field theory caused by longitudinal string spreading effects. An experiment is set up where a detector is thrown into a black hole a long time after an early infalling string. Light cone gauge calculations, taken at face value, indicate a detectable level of root-mean-square longitudinal spreading of the initial string as measured by the late infaller. This results from the large relative boost between the string and detector in the near horizon region, which develops automatically despite their modest initial energies outside the black hole and the weak curvature in the geometry. We subject this scenario to basic consistency checks, using these to obtain a relatively conservative criterion for its detectability. In a companion paper, we exhibit longitudinal nonlocality in well-defined gauge-invariant S-matrix calculations, obtaining results consistent with the predicted spreading albe...

  20. Study of Yang–Mills–Chern–Simons theory in presence of the Gribov horizon

    SciTech Connect (OSTI)

    Canfora, Fabrizio, E-mail: canfora@cecs.cl [Centro de Estudios Cientificos (CECs), Valdivia (Chile); Universidad Andres Bello, Av. Republica 440, Santiago (Chile); Gomez, Arturo, E-mail: arturo.gomez@proyectos.uai.cl [Departamento de Ciencias, Facultad de Artes Liberales y Facultad de Ingeniería y Ciencias, Universidad Adolfo Ibáñez, Viña del Mar. (Chile); Sorella, Silvio Paolo, E-mail: sorella@uerj.br [UERJ, Universidade do Estado do Rio de Janeiro (UERJ), Instituto de Física Teórica, Rua São Francisco Xavier 524, 20550-013, Maracaná, Rio de Janeiro (Brazil); Vercauteren, David, E-mail: vercauteren.uerj@gmail.com [UERJ, Universidade do Estado do Rio de Janeiro (UERJ), Instituto de Física Teórica, Rua São Francisco Xavier 524, 20550-013, Maracaná, Rio de Janeiro (Brazil)

    2014-06-15T23:59:59.000Z

    The two-point gauge correlation function in Yang–Mills–Chern–Simons theory in three dimensional Euclidean space is analysed by taking into account the non-perturbative effects of the Gribov horizon. In this way, we are able to describe the confinement and de-confinement regimes, which naturally depend on the topological mass and on the gauge coupling constant of the theory. -- Highlights: •We implement the Gribov quantization to the Topologically massive Yang–Mills theory. •We find a modified propagator at strong coupling by the Gribov horizon. •The gauge propagator depends on the topological mass and the coupling constant. •By studying the gauge propagator we describe the confined–deconfined regimes.

  1. Spherical collapse of a heat conducting fluid in higher dimensions without horizon

    E-Print Network [OSTI]

    A. banerjee; S. Chatterjee

    2004-06-08T23:59:59.000Z

    We consider a scenario where the interior spacetime,described by a heat conducting fluid sphere is matched to a Vaidya metric in higher dimensions.Interestingly we get a class of solutions, where following heat radiation the boundary surface collapses without the appearance of an event horizon at any stage and this happens with reasonable properties of matter field.The non-occurrence of a horizon is due to the fact that the rate of mass loss exactly counterbalanced by the fall of boundary radius.Evidently this poses a counter example to the so-called cosmic censorship hypothesis.Two explicit examples of this class of solutions are also given and it is observed that the rate of collapse is delayed with the introduction of extra dimensions.The work extends to higher dimensions our previous investigation in 4D.

  2. On the Smoothness of the Horizons of Multi-Black Hole Solutions

    E-Print Network [OSTI]

    Dean L. Welch

    1995-02-24T23:59:59.000Z

    In a recent paper it was suggested that some multi-black hole solutions in five or more dimensions have horizons that are not smooth. These black hole configurations are solutions to $d$-dimensional Einstein gravity (with no dilaton) and are extremally charged with a magnetic type $(d-2)$-form. In this work these solutions will be investigated further. It will be shown that although the curvature is bounded as the horizon of one of the black holes is approached, some derivatives of the curvature are not. This shows that the metric is not $C^{\\infty },$ but rather it is only $C^k$ with $k$ finite. These solutions are static so their lack of smoothness cannot be attributed to the presence of radiation.

  3. Vibration Testing of the Pluto/New Horizons Radioisotope Thermoelectric Generator

    SciTech Connect (OSTI)

    Charles D. Griffin

    2006-06-01T23:59:59.000Z

    The Radioisotopic Thermal Generator (RTG) for the Pluto/New Horizons spacecraft was subjected to a flight dynamic acceptance test to demonstrate that it would perform successfully following launch. Seven RTGs of this type had been assembled and tested at Mound, Ohio from 1984 to 1997. This paper chronicles major events in establishing a new vibration test laboratory at the Idaho National Laboratory and the nineteen days of dynamic testing.

  4. Horizon structure of rotating Einstein-Born-Infeld black holes and shadow

    E-Print Network [OSTI]

    Atamurotov, Farruh; Ahmedov, Bobomurat

    2015-01-01T23:59:59.000Z

    We investigate the horizon structure of the rotating Einstein-Born-Infeld solution which goes over to the Einstein-Maxwell's Kerr-Newman solution as the Born-Infeld parameter goes to infinity ($\\beta \\rightarrow \\infty$). We find that for a given $\\beta$, mass $M$ and charge $Q$, there exist critical spinning parameter $a_{E}$ and $r_{H}^{E}$, which corresponds to an extremal Einstein-Born-Infeld black hole with degenerate horizons, and $a_{E}$ decreases and $r_{H}^{E}$ increases with increase in the Born-Infeld parameter $\\beta$. While $aEinstein-Born-Infeld black hole with outer and inner horizons. Similarly, the effect of $\\beta$ on infinite redshift surface and in turn on ergoregion is also included. It is well known that a black hole can cast a shadow as an optical appearance due to its strong gravitational field. We also investigate the shadow cast by the non-rotating ($a=0$) Einstein-Born-Infeld black hole and demonstrate that the null geodesic equations can be integr...

  5. String-theoretic breakdown of effective field theory near black hole horizons

    E-Print Network [OSTI]

    Matthew Dodelson; Eva Silverstein

    2015-04-21T23:59:59.000Z

    We investigate the validity of the equivalence principle near horizons in string theory, analyzing the breakdown of effective field theory caused by longitudinal string spreading effects. An experiment is set up where a detector is thrown into a black hole a long time after an early infalling string. Light cone gauge calculations, taken at face value, indicate a detectable level of root-mean-square longitudinal spreading of the initial string as measured by the late infaller. This results from the large relative boost between the string and detector in the near horizon region, which develops automatically despite their modest initial energies outside the black hole and the weak curvature in the geometry. We subject this scenario to basic consistency checks, using these to obtain a relatively conservative criterion for its detectability. In a companion paper, we exhibit longitudinal nonlocality in well-defined gauge-invariant S-matrix calculations, obtaining results consistent with the predicted spreading albeit not in a direct analogue of the black hole process. We discuss applications of this effect to the firewall paradox, and estimate the time and distance scales it predicts for new physics near black hole and cosmological horizons.

  6. Hawking radiation and the boomerang behavior of massive modes near a horizon

    SciTech Connect (OSTI)

    Jannes, G. [Universite de Nice Sophia Antipolis, Laboratoire J.-A. Dieudonne, UMR CNRS-UNS 6621, Parc Valrose, 06108 Nice Cedex 02 (France); Low Temperature Laboratory, Aalto University School of Science, PO Box 15100, 00076 Aalto (Finland); Maiessa, P.; Rousseaux, G. [Universite de Nice Sophia Antipolis, Laboratoire J.-A. Dieudonne, UMR CNRS-UNS 6621, Parc Valrose, 06108 Nice Cedex 02 (France); Philbin, T. G. [School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS, Scotland (United Kingdom)

    2011-05-15T23:59:59.000Z

    We discuss the behavior of massive modes near a horizon based on a study of the dispersion relation and wave packet simulations of the Klein-Gordon equation. We point out an apparent paradox between two (in principle equivalent) pictures of black-hole evaporation through Hawking radiation. In the picture in which the evaporation is due to the emission of positive-energy modes, one immediately obtains a threshold for the emission of massive particles. In the picture in which the evaporation is due to the absorption of negative-energy modes, such a threshold apparently does not exist. We resolve this paradox by tracing the evolution of the positive-energy massive modes with an energy below the threshold. These are seen to be emitted and move away from the black-hole horizon, but they bounce back at a 'red horizon' and are reabsorbed by the black hole, thus compensating exactly for the difference between the two pictures. For astrophysical black holes, the consequences are curious but do not affect the terrestrial constraints on observing Hawking radiation. For analogue-gravity systems with massive modes, however, the consequences are crucial and rather surprising.

  7. Coordinating Inventory Control and Pricing Strategies with Random Demand and Fixed Ordering Cost: the Infinite Horizon Case

    E-Print Network [OSTI]

    Chen, Xin

    We analyze an infinite horizon, single product, periodic review model in which pricing and production/inventory decisions are made simultaneously. Demands in different periods are identically distributed random variables ...

  8. On quantum effects in the vicinity of would-be horizons

    E-Print Network [OSTI]

    P. Marecki

    2006-12-28T23:59:59.000Z

    We present a method based on the so-called Quantum Energy Inequalities, which allows to compare, and bound, the expectation values of energy-densities of ground states of quantum fields in spacetimes possessing isometric regions. The method supports the conclusion, that the Boulware energy density is universal both: at modest (and far) distances from compact spherical objects, and close to the would-be horizons of the gravastar/QBHO spacetimes. It also provides a natural consistency check for concrete (approximate, numerical) calculations of the expectation values of the energy-momentum tensors.

  9. Pedagogical notes on black holes, de Sitter space, and bifurcated horizons

    E-Print Network [OSTI]

    Tom Banks

    2010-07-22T23:59:59.000Z

    I discuss black hole evaporation in two different coordinate systems and argue that the results of the two are compatible once one takes the holographic principle into account. de Sitter space is then discussed along similar lines. Finally I make some remarks about smooth initial conditions in GR, which evolve to space-times with bifurcate horizons, and emphasize the care one must take in identifying spaces of solutions of General Relativity which belong to the same quantum theory of gravity. No really new material is presented, but the point of view I take on all 3 subjects is not widely appreciated.

  10. Microsoft Word - Horizon Wind Energy Comments.docx | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33Frequently Asked Questions forCheneyNovember S.Fluor-B&W OE-781R DOE RFI on Smart GridHorizon

  11. Apparent horizon and gravitational thermodynamics of the Universe: The temperature confusion, first and second laws, and extensions to modified gravity

    E-Print Network [OSTI]

    Tian, David Wenjie

    2014-01-01T23:59:59.000Z

    The thermodynamics of the Universe is re-studied by requiring its compatibility with the holographic-style gravitational equations which govern the dynamics of both the cosmological apparent horizon and the entire Universe. We start from the Lambda Cold Dark Matter ($\\Lambda$CDM) cosmology of general relativity (GR) to establish a framework for the gravitational thermodynamics. The Clausius equation $T_AdS_A=-A_A \\psi_t$ for the isochoric process of an instantaneous apparent horizon indicates that, the Universe and its horizon entropies encode the Positive Out thermodynamic sign convention, which encourage us to adjust the traditional positive-heat-in Gibbs equation into the positive-heat-out version $dE_m=-T_mdS_m-P_mdV$. It turns out that the standard and the generalized second laws (GSLs) of nondecreasing entropies are always respected by the event-horizon system as long as the expanding Universe is dominated by nonexotic matter $-1\\leq w_m\\leq 1$, while for the apparent-horizon simple open system the two ...

  12. Assembly and Testing of a Radioisotope Power System for the New Horizons Spacecraft

    SciTech Connect (OSTI)

    Kenneth E. Rosenberg; Stephen G. Johnson

    2006-06-01T23:59:59.000Z

    The Idaho National Laboratory (INL) recently fueled and assembled a radioisotope power system (RPS) that was used upon the New Horizons spacecraft which was launched in January 2006. New Horizons is the first mission to the last planet - the initial reconnaissance of Pluto-Charon and the Kuiper Belt, exploring the mysterious worlds at the edge of our solar system. The RPS otherwise known as a "space battery" converts thermal heat into electrical energy. The thermal heat source contains plutonium dioxide in the form of ceramic pellets encapsulated in iridium metal. The space battery was assembled in a new facility at the Idaho National Laboratory site near Idaho Falls, Idaho. The new facility has all the fueling and testing capabilities including the following: the ability to handle all the shipping containers currently certified to ship Pu-238, the ability to fuel a variety of RPS designs, the ability to perform vibrational testing to simulate transportation and launch environments, welding systems, a center of mass determination device, and various other support systems.

  13. On the construction of Hartle-Hawking-Israel states across a static bifurcate Killing horizon

    E-Print Network [OSTI]

    Ko Sanders

    2015-01-29T23:59:59.000Z

    We consider a linear scalar quantum field propagating in a space-time with a static bifurcate Killing horizon and a wedge reflection. We prove the existence of a Hadamard state which is pure, quasi-free, invariant under the Killing flow and which restricts to a double KMS state at the inverse Hawking temperature on the union of the exterior wedge regions. The existence of such a state was first conjectured by Hartle and Hawking (1976) and Israel (1976) for stationary black hole space times. Our result complements a uniqueness result of Kay and Wald (1991), who considered a general bifurcate Killing horizon and proved that a certain (large) subalgebra of the free field algebra admits at most one Hadamard state which is invariant under the Killing flow. In the presence of a wedge reflection this state reduces to a pure, quasi-free KMS state on the smaller subalgebra associated to one of the exterior wedge regions. Our result establishes the existence of such a state on the full algebra in the static case. Our proof follows the arguments of Sewell (1982) and Jacobson (1994), exploiting a Wick rotation in the Killing time coordinate to construct a corresponding Euclidean theory. Because the Killing time coordinate is ill-defined on the bifurcation surface we systematically replace it by a Gaussian normal coordinate. A crucial part of our proof is to establish that the Euclidean ground state satisfies the necessary analogs of analyticity and reflection positivity with respect to this coordinate.

  14. Stringy Stability of Charged Dilaton Black Holes with Flat Event Horizon

    E-Print Network [OSTI]

    Yen Chin Ong; Pisin Chen

    2014-12-29T23:59:59.000Z

    Electrically charged black holes with flat event horizon in anti-de Sitter space have received much attention due to various applications in Anti-de Sitter/Conformal Field Theory (AdS/CFT) correspondence, from modeling the behavior of quark-gluon plasma to superconductor. Crucial to the physics on the dual field theory is the fact that when embedded in string theory, black holes in the bulk may become vulnerable to instability caused by brane pair-production. Since dilaton arises naturally in the context of string theory, we study the effect of coupling dilaton to Maxwell field on the stability of flat charged AdS black holes. In particular, we study the stability of Gao-Zhang black holes, which are locally asymptotically anti-de Sitter. We find that for dilaton coupling parameter $\\alpha$ > 1, flat black holes are stable against brane pair production, however for 0 electrical charges is increased. Such instability however, behaves somewhat differently from that of flat Reissner-Nordstr\\"om black holes. In addition, we prove that the Seiberg-Witten action of charged dilaton AdS black hole of Gao-Zhang type with flat event horizon (at least in 5-dimension) is always logarithmically divergent at infinity for finite values of $\\alpha$, and is finite and positive in the case $\\alpha$ tends to infinity . We also comment on the robustness of our result for other charged dilaton black holes that are not of Gao-Zhang type.

  15. Hagedorn String Thermodynamics in Curved Spacetimes and near Black Hole Horizons

    E-Print Network [OSTI]

    Thomas G. Mertens

    2015-06-25T23:59:59.000Z

    This thesis concerns the study of high-temperature string theory on curved backgrounds, generalizing the notions of Hagedorn temperature and thermal scalar to general backgrounds. Chapter 2 contains a review on string thermodynamics in flat space, setting the stage. Chapters 3 and 4 contain the detailed study of the random walk picture in a general curved background. Chapters 5 and 6 then apply this to Rindler space, the near-horizon approximation of a generic (uncharged) black hole. Chapters 7 and 8 contain a study of the AdS3 and BTZ WZW models where we study the thermal spectrum and the resulting random walk picture that emerges. Chapters 9 and 10 attempt to draw general conclusions from the study of the two specific examples earlier: we draw lessons on string thermodynamics in general and on (perturbative) string thermodynamics around black hole horizons. For the latter, we point out a possible link to the firewall paradox. Finally, chapter 11 contains a detailed discussion on the near-Hagedorn (and high-energy) stress tensor in a generic spacetime, the results of which are applied to provide a description of the Bekenstein-Hawking entropy in terms of long string equilibration.

  16. Iridium abundance measurements across bio-event horizons in the fossil record

    SciTech Connect (OSTI)

    Orth, C.J.; Attrep, M. Jr.; Quintana, L.R. (Los Alamos National Lab., NM (USA))

    1989-01-01T23:59:59.000Z

    Geochemical measurements have been performed on thousands of rock samples collected across bio-event horizons using Instrumental Neutron Activation Analysis (INAA) for about 40 common and trace elements and radiochemical isolation procedures for Ir. On selected samples, Os, Pt and Au were also radiochemically determined. These studies have encompassed the time interval from the Precambrian-Cambrian transition to the Late Eocene impact (microspherule) horizons. Our early work strengthened the Alvarez impact hypothesis by finding the Ir (PGE) anomaly at the K-T boundary in continental sedimentary sequences. In collaborations with paleontologists, weak to moderately string Ir anomalies have been discovered at the Frasnian-Famennian boundary in Australia, in the Early Mississippian of Oklahoma, at the Mississipian-Pennsylvanian boundary of Oklahoma and Texas, and in the Late Cenomanian throughout the western interior of North America and on the south coast of England to date. We have found no compelling evidence for an impact related cause for these anomalies although PGE impact signatures in the two Late Cenomanian anomalies could be masked by the strong terrestrial mafic to ultramafic overprint. Thus far, our evidence for extinction events older than the terminal Cretaceous does not support recent hypotheses which suggest that impacts from cyclic swarms of comets in the inner Solar system were responsible for the periodic mass extinctions. 50 refs., 7 figs., 3 tabs.

  17. Dedicated to Sharing Information About Water Management and the Florida LAKEWATCH Program Volume 50 (2010) The Gulf Coast Oil Spill

    E-Print Network [OSTI]

    Jawitz, James W.

    50 (2010) The Gulf Coast Oil Spill It has been five months since the explosion and fire on an offshore oil-drilling platform Deepwater Horizon on April 20 in the Gulf of Mexico. Three months later that it was a success and that no more oil would flow into the Gulf from the Deepwater Horizon well. The National

  18. Issue: July 2010 Cheaper by the Dozen: Making Solar Energy Affordable

    E-Print Network [OSTI]

    Rogers, John A.

    seen in the huge oil leak associated with the Deepwater Horizon disaster in the Gulf of Mexico and readily available reserves are exhausted. [See The Deepwater Horizon Oil Leak, June 2010; Global Warming Report: UN Warms Up to Climate Change, February 2007] So, are we to swear off oil, coal and the like? It

  19. A Brief Introduction to Ocean Oil Spills Professor Tommy Dickey, Secretary of the Navy/Chief of Naval Operations

    E-Print Network [OSTI]

    Fabrikant, Sara Irina

    of Mexico Spill Ongoing BP Deepwater Horizon ­ Gulf of Mexico ­ estimates of 12,000-24,000 bbls/day or 430 by BP Photo provided by BP NASA Terra image #12;What are Causes of Ocean Oil Spills? * Oil drilling rig B lawsuit, >$2 B cleanup costs #12;BP Deepwater Horizon ­ Gulf of Mexico Located 40 miles southeast

  20. Hydro International Corals and Water Column Study for Gulf Oil Spill Response

    E-Print Network [OSTI]

    Belogay, Eugene A.

    of NOAA's response to the Deepwater Horizon/BP oil spill. "This is a major catastrophe," said Nelson of Mexico to gather baseline data against which to measure change if oil from the Deepwater Horizon spillHydro International Corals and Water Column Study for Gulf Oil Spill Response 14/07/2010 A science

  1. Azadegan, A. 2013 SupplyChainDisruptions,

    E-Print Network [OSTI]

    Lin, Xiaodong

    of America Toyota Recall BP Oil Spill Chinese Toys Recall A.Azadegan­PresentationtoDepartmentof Homeland Acceleration Recall #12;Azadegan, A. 2013 2010 Deepwater Horizon oil spill The disruption: Major oil spill from semi-submersible exploratory offshore drilling rig Deepwater Horizon in the Gulf of Mexico. What

  2. National Oceanic and Atmospheric Administration U.S. Department of Commerce

    E-Print Network [OSTI]

    in Louisiana wetlands during the Deepwater Horizon/ BP Oil Spill, May 2010. ) #12;4 Restoration: There are many and restoration costs. Potential Impacts of the Deepwater Horizon Spill The oil spill is impacting Louisiana visit http://www.darrp.noaa.gov. Learn more about NOAA's response to the BP oil spill at http

  3. Plumes in the environment Sources: vulcan.wr.usgs.gov, geography.hunter.cuny.edu, earthobservatory.nasa.gov

    E-Print Network [OSTI]

    Flynn, Morris R.

    havoc for the European airline industry · BP's Deepwater Horizon oil spill in the Gulf of Mexico spill in the Gulf of Mexico · Deepwater Horizon drilling rig exploded on April 20, 2010, killing 11, water and air quality, tourism, etc. Source: wikipedia Thursday, January 26, 2012 #12;Oil spill

  4. WRITTEN STATEMENT BY DEPUTY CHIEF, ASSESSMENT AND RESTORATION DIVISION

    E-Print Network [OSTI]

    involvement in the Deepwater Horizon BP oil spill response effort. My name is Tony Penn and I am the Deputy restoration following an oil spill. The Deepwater Horizon BP oil spill, the largest accidental oil spill as a whole from the BP oil spill. NOAA and our co-trustees have been working tirelessly to assess

  5. NOAA Ship Thomas Jefferson June 1527

    E-Print Network [OSTI]

    Galveston, Texas on June 15 for its third research mission to study the Deepwater Horizon/BP oil spill samples show conditions that existed in an area before any impacts from the spill have occurred. The ship of the Deepwater Horizon wellhead site. The ship also collected midwater acoustic data as close as 1000m from

  6. U.S. Fish & Wildlife Service and the National Oceanic and Atmospheric Administration Cumulative Impacts to Wildlife

    E-Print Network [OSTI]

    the clock to protect and rescue wildlife that is at risk from the Deepwater Horizon/BP oil spill Impacts to Wildlife and Actions to Protect Wildlife in the Gulf of Mexico The Deepwater Horizon/BP Oil Spill Response Protection Strategy The Unified Area Command's Wildlife Branches, staffed by experts from

  7. Exploratory Characterization of a Perfluoropolyether Oil as a Possible Viscosity Standard at Deepwater Production Conditions of 533 K and 241 MPa

    SciTech Connect (OSTI)

    Baled, Hseen O.; Tapriyal, Deepak; Morreale, Bryan D.; Soong, Yee; Gamwo, Isaac; Krukonis, Val; Bamgbade, Babatunde A.; Wu, Yue; McHugh, Mark A.; Burgess, Ward A.; M Enick, Robert M.

    2013-10-01T23:59:59.000Z

    DuPont’s perfluoropolyether oil Krytox® GPL 102 is a promising candidate for the high-temperature, high-pressure Deepwater viscosity standard (DVS). The preferred DVS is a thermally stable liquid that exhibits a viscosity of roughly 20 mPa?s at 533 K and 241 MPa; a viscosity value representative of light oils found in ultra-deep formations beneath the deep waters of the Gulf of Mexico. A windowed rolling-ball viscometer designed by our team is used to determine the Krytox® GPL 102 viscosity at pressures to 245 MPa and temperatures of 311 K, 372 K, and 533 K. At 533 K and 243 MPa, the Krytox® GPL 102 viscosity is (27.2±1.3)mPa?s . The rolling-ball viscometer viscosity results for Krytox® GPL 102 are correlated with an empirical 10-parameter surface fitting function that yields an MAPD of 3.9 %. A Couette rheometer is also used to measure the Krytox® GPL 102 viscosity, yielding a value of (26.2±1)mPa?s at 533 K and 241 MPa. The results of this exploratory study suggest that Krytox® GPL 102 is a promising candidate for the DVS, primarily because this fluoroether oil is thermally stable and exhibits a viscosity closer to the targeted value of 20 mPa ? s at 533 K and 241 MPa than any other fluid reported to date. Nonetheless, further studies must be conducted by other researcher groups using various types of viscometers and rheometers on samples of Krytox GPL® 102 from the same lot to further establish the properties of Krytox GPL® 102.

  8. Extremal Rotating Black Holes in the Near-Horizon Limit: Phase Space and Symmetry Algebra

    E-Print Network [OSTI]

    Compère, G; Seraj, A; Sheikh-Jabbari, M M

    2015-01-01T23:59:59.000Z

    We construct the NHEG phase space, the classical phase space of Near-Horizon Extremal Geometries with fixed angular momenta and entropy, and with the largest symmetry algebra. We focus on vacuum solutions to $d$ dimensional Einstein gravity. Each element in the phase space is a geometry with $SL(2,R)\\times U(1)^{d-3}$ Killing isometries which has vanishing $SL(2,R)$ and constant $U(1)$ charges. We construct an on-shell vanishing symplectic structure, which leads to an infinite set of symplectic symmetries. In four spacetime dimensions, the phase space is unique and the symmetry algebra consists of the familiar Virasoro algebra, while in $d > 4$ dimensions the symmetry algebra, the NHEG algebra, contains infinitely many Virasoro subalgebras. The nontrivial central term of the algebra is proportional to the black hole entropy. This phase space and in particular its symmetries might serve as a basis for a semiclassical description of extremal rotating black hole microstates.

  9. Black Hole spin dependence of general relativistic multi-transonic accretion close to the horizon

    E-Print Network [OSTI]

    Tapas K. Das; Sankhasubhra Nag; Swathi Hegde; Sourav Bhattacharya; Ishita Maity; Bozena Czerny; Paramita Barai; Paul J. Wiita; Vladimir Karas; Tapan Naskar

    2014-12-31T23:59:59.000Z

    We introduce a novel formalism to investigate the role of the spin angular momentum of astrophysical black holes in influencing the behaviour of low angular momentum general relativistic accretion. We propose a metric independent analysis of axisymmetric general relativistic flow, and consequently formulate the space and time dependent equations describing the general relativistic hydrodynamic accretion flow in the Kerr metric. The associated stationary critical solutions for such flow equations are provided and the stability of the stationary transonic configuration is examined using an elegant linear perturbation technique. We examine the properties of infalling material for both prograde and retrograde accretion as a function of the Kerr parameter at extremely close proximity to the event horizon. Our formalism can be used to identify a new spectral signature of black hole spin, and has the potential of performing the black hole shadow imaging corresponding to the low angular momentum accretion flow.

  10. Gödel black hole, closed timelike horizon, and the study of particle emissions

    E-Print Network [OSTI]

    Sourav Bhattacharya; Anirban Saha

    2010-07-22T23:59:59.000Z

    We show that a particle, with positive orbital angular momentum, following an outgoing null/timelike geodesic, shall never reach the closed timelike horizon (CTH) present in the $(4+1)$-dimensional rotating G\\"{o}del black hole space-time. Therefore a large part of this space-time remains inaccessible to a large class of geodesic observers, depending on the conserved quantities associated with them. We discuss how this fact and the existence of the closed timelike curves present in the asymptotic region make the quantum field theoretic study of the Hawking radiation, where the asymptotic observer states are a pre-requisite, unclear. However, the semiclassical approach provides an alternative to verify the Smarr formula derived recently for the rotating G\\"{o}del black hole. We present a systematic analysis of particle emissions, specifically for scalars, charged Dirac spinors and vectors, from this black hole via the semiclassical complex path method.

  11. Lyapunov exponents and anomalous diffusion of a Lorentz gas with infinite horizon using approximate zeta functions

    SciTech Connect (OSTI)

    Dahlqvist, P. [Royal Inst. of Technology, Stockholm (Sweden)

    1996-08-01T23:59:59.000Z

    We compute the Lyapunov exponent, the generalized Lyapunov exponents, and the diffusion constant for a Lorentz gas on a square lattice, thus having infinite horizon. Approximate zeta functions, written in terms of probabilities rather than periodic orbits, are used in order to avoid the convergence problems of cycle expansions. The emphasis is on the relaxation between the analytic structure of the zeta function, where a branch cut plays an important role, and the asymptotic dynamics of the system. The Lyapunov exponent for the corresponding map agrees with the conjectured limit {lambda}{sub map}=-2 log(R) + C + O(R) and we derive an approximate value for the constant C in good agreement with numerical simulations. We also find a diverging diffusion constant D(t){approx}log t and a phase transition for the generalized Lyapunov exponents.

  12. Draft Horizon 2020 Work Programme 2014-2015 in the area of Food security, sustainable agriculture and forestry,

    E-Print Network [OSTI]

    Greifswald, Ernst-Moritz-Arndt-Universität

    agriculture and forestry, marine and maritime and inland water research and the bioeconomy Important notice of this document. #12;HORIZON 2020 ­ WORK PROGRAMME 2014-2015 Food security, sustainable agriculture and forestry ..................... 14 SFS-7-2014/2015: Genetic resources and agricultural diversity for food security, productivity

  13. Renormalized Vacuum Polarization and Stress Tensor on the Horizon of a Schwarzschild Black Hole Threaded by a Cosmic String

    E-Print Network [OSTI]

    Adrian C. Ottewill; Peter Taylor

    2010-10-19T23:59:59.000Z

    We calculate the renormalized vacuum polarization and stress tensor for a massless, arbitrarily coupled scalar field in the Hartle-Hawking vacuum state on the horizon of a Schwarzschild black hole threaded by an infinte straight cosmic string. This calculation relies on a generalized Heine identity for non-integer Legendre functions which we derive without using specific properties of the Legendre functions themselves.

  14. Adaptive Receding Horizon Control of Tubular Bioreactors J.M. Igreja, J. M. Lemos and R. N. Silva

    E-Print Network [OSTI]

    Sontag, Eduardo

    Adaptive Receding Horizon Control of Tubular Bioreactors J.M. Igreja, J. M. Lemos and R. N. Silva algorithm to tubular bioreactors. According to the control strategy proposed, the system of PDEs describing bioreactors. The approach followed consists in approximating the hyperbolic PDE describing the plant

  15. A knowledge-based approach of seismic interpretation : horizon and dip-fault detection by means of cognitive vision.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A knowledge-based approach of seismic interpretation : horizon and dip-fault detection by means presents preliminary results obtained through a new seismic interpretation methodology based on cognitive building process. The efforts currently made to improve seismic interpretation are mainly focused

  16. Load Reduction of Wind Turbines Using Receding Horizon Control Mohsen Soltani, Rafael Wisniewski, Per Brath, and Stephen Boyd

    E-Print Network [OSTI]

    Load Reduction of Wind Turbines Using Receding Horizon Control Mohsen Soltani, Rafael Wisniewski, Per Brath, and Stephen Boyd Abstract-- Large scale wind turbines are lightly damped mechanical% respectively, when compared to a conventional controller. I. INTRODUCTION The size of wind turbine structures

  17. Apparent horizon and gravitational thermodynamics of the Universe: Solutions to the temperature and entropy confusions, and extensions to modified gravity

    E-Print Network [OSTI]

    David Wenjie Tian; Ivan Booth

    2015-01-22T23:59:59.000Z

    Thermodynamics of the Universe is restudied by requiring its compatibility with the holographic-style gravitational equations which govern the dynamics of both the cosmological apparent horizon and the entire Universe. We start from the Lambda Cold Dark Matter ($\\Lambda$CDM) cosmology of general relativity (GR) to establish a framework for the gravitational thermodynamics. The Cai-Kim Clausius equation $T_{\\text{A}}dS_{\\text{A}}=-dE_{\\text{A}}=-A_{\\text{A}} \\psi_t$ for the isochoric process of an instantaneous apparent horizon indicates that, the Universe and its horizon entropies encode the Positive Out thermodynamic sign convention, which encourage us to adjust the traditional positive-heat-in Gibbs equation into the positive-heat-out version $dE_m=-T_mdS_m-P_mdV$. It turns out that the standard and the generalized second laws (GSLs) of nondecreasing entropies are always respected by the event-horizon system as long as the expanding Universe is dominated by nonexotic matter $-1\\leq w_m\\leq 1$, while for the apparent-horizon simple open system the two second laws hold if $-1\\leq w_martificial local equilibrium assumption is abandoned in the GSL. All constraints regarding entropy evolution are expressed by the equation of state parameters, which show that from a thermodynamic perspective the phantom dark energy is less favored than the cosmological constant and the quintessence. Finally, the whole framework is extended from GR and $\\Lambda$CDM to modified gravities with field equations $R_{\\mu\

  18. Event-horizon-scale structure in the supermassive black hole candidate at the Galactic Centre

    E-Print Network [OSTI]

    Sheperd Doeleman; Jonathan Weintroub; Alan E. E. Rogers; Richard Plambeck; Robert Freund; Remo P. J. Tilanus; Per Friberg; Lucy M. Ziurys; James M. Moran; Brian Corey; Ken H. Young; Daniel L. Smythe; Michael Titus; Daniel P. Marrone; Roger J. Cappallo; Douglas C. J. Bock; Geoffrey C. Bower; Richard Chamberlin; Gary R. Davis; Thomas P. Krichbaum; James Lamb; Holly Maness; Arthur E. Niell; Alan Roy; Peter Strittmatter; Daniel Werthimer; Alan R. Whitney; David Woody

    2008-09-15T23:59:59.000Z

    The cores of most galaxies are thought to harbour supermassive black holes, which power galactic nuclei by converting the gravitational energy of accreting matter into radiation (ref 1). Sagittarius A*, the compact source of radio, infrared and X-ray emission at the centre of the Milky Way, is the closest example of this phenomenon, with an estimated black hole mass that is 4 million times that of the Sun (refs. 2,3). A long-standing astronomical goal is to resolve structures in the innermost accretion flow surrounding Sgr A* where strong gravitational fields will distort the appearance of radiation emitted near the black hole. Radio observations at wavelengths of 3.5 mm and 7 mm have detected intrinsic structure in Sgr A*, but the spatial resolution of observations at these wavelengths is limited by interstellar scattering (refs. 4-7). Here we report observations at a wavelength of 1.3 mm that set a size of 37 (+16, -10; 3-sigma) microarcseconds on the intrinsic diameter of Sgr A*. This is less than the expected apparent size of the event horizon of the presumed black hole, suggesting that the bulk of SgrA* emission may not be not centred on the black hole, but arises in the surrounding accretion flow.

  19. DETECTION OF THE COSMIC {gamma}-RAY HORIZON FROM MULTIWAVELENGTH OBSERVATIONS OF BLAZARS

    SciTech Connect (OSTI)

    Dominguez, A.; Siana, B. [Department of Physics and Astronomy, University of California, Riverside, CA 92521 (United States); Finke, J. D. [U.S. Naval Research Laboratory, Space Science Division, Code 7653, 4555 Overlook Avenue SW, Washington, DC 20375 (United States); Prada, F. [Campus of International Excellence UAM-CSIC, Cantoblanco, E-28049 Madrid (Spain); Primack, J. R. [Department of Physics, University of California, Santa Cruz, CA 95064 (United States); Kitaura, F. S. [Leibniz-Institut fuer Astrophysik (AIP), An der Sternwarte 16, D-14482 Potsdam (Germany); Paneque, D., E-mail: albertod@ucr.edu [Kavli Institute for Particle Astrophysics and Cosmology, SLAC, Stanford University, Stanford, CA 94305 (United States)

    2013-06-10T23:59:59.000Z

    The first statistically significant detection of the cosmic {gamma}-ray horizon (CGRH) that is independent of any extragalactic background light (EBL) model is presented. The CGRH is a fundamental quantity in cosmology. It gives an estimate of the opacity of the universe to very high energy (VHE) {gamma}-ray photons due to photon-photon pair production with the EBL. The only estimations of the CGRH to date are predictions from EBL models and lower limits from {gamma}-ray observations of cosmological blazars and {gamma}-ray bursts. Here, we present homogeneous synchrotron/synchrotron self-Compton (SSC) models of the spectral energy distributions of 15 blazars based on (almost) simultaneous observations from radio up to the highest energy {gamma}-rays taken with the Fermi satellite. These synchrotron/SSC models predict the unattenuated VHE fluxes, which are compared with the observations by imaging atmospheric Cherenkov telescopes. This comparison provides an estimate of the optical depth of the EBL, which allows us a derivation of the CGRH through a maximum likelihood analysis that is EBL-model independent. We find that the observed CGRH is compatible with the current knowledge of the EBL.

  20. Detection of the Cosmic ?-Ray Horizon From Multiwavelength Observations of Blazars

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Dominguez, A.; Finke, J. D.; Prada, F.; Primack, J. R.; Kitaura, F. S.; Siana, B.; Paneque, D.

    2013-05-24T23:59:59.000Z

    The first statistically significant detection of the cosmic ?-ray horizon (CGRH) that is independent of any extragalactic background light (EBL) model is presented. The CGRH is a fundamental quantity in cosmology. It gives an estimate of the opacity of the Universe to very high energy (VHE) ?-ray photons due to photon-photon pair production with the EBL. The only estimations of the CGRH to date are predictions from EBL models and lower limits from ?-ray observations of cosmological blazars and ?-ray bursts. Here, we present homogeneous synchrotron/synchrotron self-Compton (SSC) models of the spectral energy distributions of 15 blazars based on (almost) simultaneous observations from radio up to the highest energy ?-rays taken with the Fermi satellite. These synchrotron/SSC models predict the unattenuated VHE fluxes, which are compared with the observations by imaging atmospheric Cherenkov telescopes. This comparison provides an estimate of the optical depth of the EBL, which allows a derivation of the CGRH through a maximum likelihood analysis that is EBL-model independent. We find that the observed CGRH is compatible with the current knowledge of the EBL.

  1. X-RAY TRANSIENTS IN THE ADVANCED LIGO/VIRGO HORIZON

    SciTech Connect (OSTI)

    Kanner, Jonah [LIGO-California Institute of Technology, Pasadena, CA 91125 (United States); Baker, John; Blackburn, Lindy; Camp, Jordan [NASA Goddard Space Flight Center, Mail Code 663, Greenbelt, MD 20771 (United States); Mooley, Kunal [California Institute of Technology, Astronomy Department, Mail Code 249-17, Pasadena, CA 91125 (United States); Mushotzky, Richard; Ptak, Andy, E-mail: jonah.kanner@ligo.org [NASA Goddard Space Flight Center, Mail Code 661, Greenbelt, MD 20771 (United States)

    2013-09-01T23:59:59.000Z

    Advanced LIGO and Advanced Virgo will be all-sky monitors for merging compact objects within a few hundred megaparsecs. Finding the electromagnetic counterparts to these events will require an understanding of the transient sky at low redshift (z < 0.1). We performed a systematic search for extragalactic, low redshift, transient events in the XMM-Newton Slew Survey. In a flux limited sample, we found that highly variable objects comprised 10% of the sample, and that of these, 10% were spatially coincident with cataloged optical galaxies. This led to 4 Multiplication-Sign 10{sup -4} transients per square degree above a flux threshold of 3 Multiplication-Sign 10{sup -12} erg cm{sup -2} s{sup -1} (0.2-2 keV) which might be confused with LIGO/Virgo counterparts. This represents the first extragalactic measurement of the soft X-ray transient rate within the Advanced LIGO/Virgo horizon. Our search revealed six objects that were spatially coincident with previously cataloged galaxies, lacked evidence for optical active galactic nuclei, displayed high luminosities {approx}10{sup 43} erg s{sup -1}, and varied in flux by more than a factor of 10 when compared with the ROSAT All-Sky Survey. At least four of these displayed properties consistent with previously observed tidal disruption events.

  2. Clustering of quintessence on horizon scales and its imprint on HI intensity mapping

    SciTech Connect (OSTI)

    Duniya, Didam G.A.; Bertacca, Daniele; Maartens, Roy, E-mail: adamsgwazah@gmail.com, E-mail: daniele.bertacca@gmail.com, E-mail: roy.maartens@gmail.com [Physics Department, University of the Western Cape, Cape Town 7535 (South Africa)

    2013-10-01T23:59:59.000Z

    Quintessence can cluster only on horizon scales. What is the effect on the observed matter distribution? To answer this, we need a relativistic approach that goes beyond the standard Newtonian calculation and deals properly with large scales. Such an approach has recently been developed for the case when dark energy is vacuum energy, which does not cluster at all. We extend this relativistic analysis to deal with dynamical dark energy. Using three quintessence potentials as examples, we compute the angular power spectrum for the case of an HI intensity map survey. Compared to the concordance model with the same small-scale power at z = 0, quintessence boosts the angular power by up to ? 15% at high redshifts, while power in the two models converges at low redshifts. The difference is mainly due to the background evolution, driven mostly by the normalization of the power spectrum today. The dark energy perturbations make only a small contribution on the largest scales, and a negligible contribution on smaller scales. Ironically, the dark energy perturbations remove the false boost of large-scale power that arises if we impose the (unphysical) assumption that the dark energy is smooth.

  3. Generalized second law of thermodynamics on the apparent horizon in modified Gauss-Bonnet gravity

    E-Print Network [OSTI]

    Abdolmaleki, A

    2015-01-01T23:59:59.000Z

    Modified gravity and generalized second law (GSL) of thermodynamics are interesting topics in the modern cosmology. In this regard, we investigate the GSL of gravitational thermodynamics in the framework of modified Gauss-Bonnet gravity or f(G)-gravity. We consider a spatially FRW universe filled with the matter and radiation enclosed by the dynamical apparent horizon with the Hawking temperature. For two viable f(G) models, we first numerically solve the set of differential equations governing the dynamics of f(G)-gravity. Then, we obtain the evolutions of the Hubble parameter, the Gauss-Bonnet curvature invariant term, the density and equation of state parameters as well as the deceleration parameter. In addition, we check the energy conditions for both models and finally examine the validity of the GSL. For the selected f(G) models, we conclude that both models have a stable de Sitter attractor. The equation of state parameters behave quite similar to those of the LCDM model in the radiation/matter dominat...

  4. A problem of hypothetical emerging of cosmic background radiation photons on horizon in the standard model of universe

    E-Print Network [OSTI]

    V. Skalsky

    2000-09-25T23:59:59.000Z

    The present temperature of cosmic background radiation and the present number density of photons of cosmic background radiation in the observed expansive and isotropic relativistic Universe is in the standard model of universe explained by the assumption of emergence of the photons of cosmic background radiation on the horizon (of the most remote visibility). However, the physical analysis shows unambiguously that this assumption contradicts the special theory of relativity and the quantum mechanics.

  5. Flexural unfolding of horizons using paleomagnetic vectors M.J. Ramn a,b,*, Emilio L. Pueyo a

    E-Print Network [OSTI]

    Zaragoza, Universidad de

    Flexural unfolding of horizons using paleomagnetic vectors M.J. Ramón a,b,*, Emilio L. Pueyo a , José Luis Briz c,d , Andrés Pocoví b , José Carlos Ciria c a Instituto Geológico y Minero de España (IGME), Unidad de Zaragoza, Zaragoza, Spain b Departamento de Ciencias de la Tierra, University

  6. Monitoring and Reporting Services for the Toronto Library, Final Report, TESCOR Energy Services, through Energy Systems Associates and New Horizons Technology

    E-Print Network [OSTI]

    Haberl, J. S.; Athar, A.; Claridge, D. E.

    1998-01-01T23:59:59.000Z

    This report summarizes the work performed for TESCOR Energy Services through Energy Systems Associates and New Horizons Technology. This work includes the monitoring and analysis of data from the data logger that was installed in the Toronto Library...

  7. RESULTS FROM THE (1) DATA COLLECTION WORKSHOP, (2) MODELING WORKSHOP AND (3) DRILLING AND CORING METHODS WORKSHOP AS PART OF THE JOINT INDUSTRY PARTICIPATION (JIP) PROJECT TO CHARACTERIZE NATURAL GAS HYDRATES IN THE DEEPWATER GULF OF MEXICO

    SciTech Connect (OSTI)

    Stephen A. Holditch; Emrys Jones

    2002-09-01T23:59:59.000Z

    In 2000, Chevron began a project to learn how to characterize the natural gas hydrate deposits in the deepwater portions of the Gulf of Mexico. A Joint Industry Participation (JIP) group was formed in 2001, and a project partially funded by the U.S. Department of Energy (DOE) began in October 2001. The primary objective of this project is to develop technology and data to assist in the characterization of naturally occurring gas hydrates in the deepwater Gulf of Mexico. These naturally occurring gas hydrates can cause problems relating to drilling and production of oil and gas, as well as building and operating pipelines. Other objectives of this project are to better understand how natural gas hydrates can affect seafloor stability, to gather data that can be used to study climate change, and to determine how the results of this project can be used to assess if and how gas hydrates act as a trapping mechanism for shallow oil or gas reservoirs. As part of the project, three workshops were held. The first was a data collection workshop, held in Houston during March 14-15, 2002. The purpose of this workshop was to find out what data exist on gas hydrates and to begin making that data available to the JIP. The second and third workshop, on Geoscience and Reservoir Modeling, and Drilling and Coring Methods, respectively, were held simultaneously in Houston during May 9-10, 2002. The Modeling Workshop was conducted to find out what data the various engineers, scientists and geoscientists want the JIP to collect in both the field and the laboratory. The Drilling and Coring workshop was to begin making plans on how we can collect the data required by the project's principal investigators.

  8. Horizon-absorption effects in coalescing black-hole binaries: An effective-one-body study of the non-spinning case

    E-Print Network [OSTI]

    Sebastiano Bernuzzi; Alessandro Nagar; Anil Zenginoglu

    2012-12-19T23:59:59.000Z

    We study the horizon absorption of gravitational waves in coalescing, circularized, nonspinning black hole binaries. The horizon absorbed fluxes of a binary with a large mass ratio (q=1000) obtained by numerical perturbative simulations are compared with an analytical, effective-one-body (EOB) resummed expression recently proposed. The perturbative method employs an analytical, linear in the mass ratio, effective-one-body (EOB) resummed radiation reaction, and the Regge-Wheeler-Zerilli (RWZ) formalism for wave extraction. Hyperboloidal (transmitting) layers are employed for the numerical solution of the RWZ equations to accurately compute horizon fluxes up to the late plunge phase. The horizon fluxes from perturbative simulations and the EOB-resummed expression agree at the level of a few percent down to the late plunge. An upgrade of the EOB model for nonspinning binaries that includes horizon absorption of angular momentum as an additional term in the resummed radiation reaction is then discussed. The effect of this term on the waveform phasing for binaries with mass ratios spanning 1 to 1000 is investigated. We confirm that for comparable and intermediate-mass-ratio binaries horizon absorbtion is practically negligible for detection with advanced LIGO and the Einstein Telescope (faithfulness greater than or equal to 0.997).

  9. EFT Beyond the Horizon: Stochastic Inflation and How Primordial Quantum Fluctuations Go Classical

    E-Print Network [OSTI]

    C. P. Burgess; R. Holman; G. Tasinato; M. Williams

    2014-11-04T23:59:59.000Z

    We identify the effective theory describing inflationary super-Hubble scales and show it to be a special case of effective field theories appropriate to open systems. Open systems allow information to be exchanged between the degrees of freedom of interest and those that are integrated out, such as for particles moving through a fluid. Strictly speaking they cannot in general be described by an effective lagrangian; rather the appropriate `low-energy' limit is instead a Lindblad equation describing the evolution of the density matrix of the slow degrees of freedom. We derive the equation relevant to super-Hubble modes of quantum fields in near-de Sitter spacetimes and derive two implications. We show the evolution of the diagonal density-matrix elements quickly approaches the Fokker-Planck equation of Starobinsky's stochastic inflationary picture. This provides an alternative first-principles derivation of this picture's stochastic noise and drift, as well as its leading corrections. (An application computes the noise for systems with a sub-luminal sound speed.) We argue that the presence of interactions drives the off-diagonal density-matrix elements to zero in the field basis. This shows why the field basis is the `pointer basis' for the decoherence of primordial quantum fluctuations while they are outside the horizon, thus allowing them to re-enter as classical fluctuations, as assumed when analyzing CMB data. The decoherence process is efficient, occurring after several Hubble times even for interactions as weak as gravitational-strength. Crucially, the details of the interactions largely control only the decoherence time and not the nature of the final late-time stochastic state, much as interactions can control the equilibration time for thermal systems but are largely irrelevant to the properties of the resulting equilibrium state.

  10. Deepwater Wind | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model,DOE Facility Database DataDatatechnicNewDeaf

  11. Some effects of magnetic blowouts on arc interruption

    E-Print Network [OSTI]

    Benish, Joe

    1949-01-01T23:59:59.000Z

    . n (ct + E 5' The constant of integration, K, is evaluated from thc i nit, lal conditions, x when time, t = 0 -I -hus 8 = sin (1) = tan I Y( = tan x 2 2 2 ()en (I', ) K =: tcn a -I I 2 a prB tan v Then ths complete equation for ths motion...

  12. Rock mechanics aspects of blowout self-containment

    E-Print Network [OSTI]

    Akbarnejad Nesheli, Babak

    2009-06-02T23:59:59.000Z

    .1.4 Poisson?s Ratio (?) ................................................................................ 16 2.2 Mohr-Coulomb Failure Criterion .................................................................... 17 2.3 Modified-Lade Failure Criterion... et al. 9 ) ....... 6 2.1 ? The Mohr-Coulomb failure criterion (from Goodman 45 )......................................... 18 2.2 ? Geometry of an inclined borehole (from Fjaer et al. 41 )............................................ 21 4...

  13. Combining Multicomponent Seismic Attributes, New Rock Physics Models, and In Situ Data to Estimate Gas-Hydrate Concentrations in Deep-Water, Near-Seafloor Strata of the Gulf of Mexico

    SciTech Connect (OSTI)

    Bureau of Economic Geology

    2009-04-30T23:59:59.000Z

    The Bureau of Economic Geology was contracted to develop technologies that demonstrate the value of multicomponent seismic technology for evaluating deep-water hydrates across the Green Canyon area of the Gulf of Mexico. This report describes the methodologies that were developed to create compressional (P-P) and converted-shear (P-SV) images of near-seafloor geology from four-component ocean-bottom-cable (4C OBC) seismic data and the procedures used to integrate P-P and P-SV seismic attributes with borehole calibration data to estimate hydrate concentration across two study areas spanning 16 and 25 lease blocks (or 144 and 225 square miles), respectively. Approximately 200 km of two-dimensional 4C OBC profiles were processed and analyzed over the course of the 3-year project. The strategies we developed to image near-seafloor geology with 4C OBC data are unique, and the paper describing our methodology was peer-recognized with a Best Paper Award by the Society of Exploration Geophysicists in the first year of the project (2006). Among the valuable research findings demonstrated in this report, the demonstrated ability to image deep-water near-seafloor geology with sub-meter resolution using a standard-frequency (10-200 Hz) air gun array on the sea surface and 4C sensors on the seafloor has been the accomplishment that has received the most accolades from professional peers. Our study found that hydrate is pervasive across the two study areas that were analyzed but exists at low concentrations. Although our joint inversion technique showed that in some limited areas, and in some geologic units across those small areas, hydrates occupied up to 40-percent of the sediment pore space, we found that when hydrate was present, hydrate concentration tended to occupy only 10-percent to 20-percent of the pore volume. We also found that hydrate concentration tended to be greater near the base of the hydrate stability zone than it was within the central part of the stability zone.

  14. The holographic mapping of the Standard Model onto the black hole horizon, Part I: Abelian vector field, scalar field and BEH Mechanism

    E-Print Network [OSTI]

    G. 't Hooft

    2005-04-25T23:59:59.000Z

    Interactions between outgoing Hawking particles and ingoing matter are determined by gravitational forces and Standard Model interactions. In particular the gravitational interactions are responsible for the unitarity of the scattering against the horizon, as dictated by the holographic principle, but the Standard Model interactions also contribute, and understanding their effects is an important first step towards a complete understanding of the horizon's dynamics. The relation between in- and outgoing states is described in terms of an operator algebra. In this paper, the first of a series, we describe the algebra induced on the horizon by U(1) vector fields and scalar fields, including the case of an Englert-Brout-Higgs mechanism, and a more careful consideration of the transverse vector field components.

  15. Provenance of Corexit-related chemical constituents found in nearshore and inland Gulf Coast waters

    E-Print Network [OSTI]

    Clement, Prabhakar

    , crude oil from the Deepwater Hori- zon accident began washing onto northern Gulf of Mexico(GOM) sandy. This northern Gulf of Mexico beach community was heavily impacted by Deepwater Horizon-related oil (Hayworth stormwater discharge. Ó 2012 Elsevier Ltd. All rights reserved. 1. Introduction Starting in early June, 2010

  16. Free Energies and Probe Actions for Near-horizon D-branes and D1 + D5 System

    E-Print Network [OSTI]

    Shijong Ryang

    1999-03-18T23:59:59.000Z

    By working with the free energy for the type II supergravity near-horizon solution of N coincident non-extremal Dp-branes we study the transitions among the non-conformal Dp-brane system, the perturbative super Yang-Mills theory and a certain system associated with M theory. We derive a relation between this free energy and the action of a Dp-brane probe in the N Dp-brane background. Constructing the free energy for the five dimensional black hole labeled by the D1-brane and D5-brane charges we find the similar relation between it and the action of a D1 or D5 brane probe in the D1 + D5 brane background. These relations are explained by the massive open strings stretched between the relevant D-branes

  17. Secretary Chu Tasks Environmental, Industry and State Leaders...

    Energy Savers [EERE]

    investigating the Deepwater Horizon accident. He was the chairman and co-founder of GeoMechanics International and serves as a senior adviser to Baker Hughes, Inc. Prior to joining...

  18. Design of a flexible containment system for deep ocean oil spills

    E-Print Network [OSTI]

    Maas, Natasha

    2013-01-01T23:59:59.000Z

    BP needed almost 3 months to cap the Deepwater Horizon spill; improved response techniques are needed for the future. This work presents the design and deployment plan for a new type of containment system that captures the ...

  19. A Tale of Two Spills: Novel Science and Policy Implications of an Emerging New Oil Spill Model

    E-Print Network [OSTI]

    Adams, E. Eric

    The 2010 Deepwater Horizon oil release posed the challenges of two types of spill: a familiar spill characterized by buoyant oil, fouling and killing organisms at the sea surface and eventually grounding on and damaging ...

  20. Revue de presse ANGLAIS Semaine du 23 au 29 avril 2012

    E-Print Network [OSTI]

    Rennes, Université de

    ; the fall of Rome and the rise of Islam. Environment ­ BP Oil spill Deepwater Horizon aftermath: how much is a dolphin worth? (By Suzanne Goldenberg) Two years after the Gulf of Mexico oil disaster, BP and US

  1. Rear Admiral David A. Score Deputy Director, NOAA Commissioned Officer Corps

    E-Print Network [OSTI]

    Horizon oil spill response. Since his commission as a NOAA Corps officer in 1990, RDML Score has served Score commanded NOAA Ship Gordon Gunter, which conducted key research missions during the BP Deepwater

  2. Environmental Law Program 2011-2012 The last year has been an exciting and dynamic one for the Environmental Law Program

    E-Print Network [OSTI]

    Wolfe, Patrick J.

    on the BP Deepwater Horizon Oil Spill and Offshore Drilling, appointed by President Barack Obama 91, to investigate the root causes of the Gulf oil spill. Professor Lazaruss 2004 book, The Making Of Environmental

  3. Bergeon Burns 1 CHRISTINE M. BERGEON BURNS

    E-Print Network [OSTI]

    . CURRENT RESEARCH · Response of seaside sparrows (Ammodramus maritimus) to the BP Deepwater Horizon oil spill. Post-doctoral research, Louisiana State University AgCenter, with Drs. Philip Stouffer (LSU

  4. Revue de presse ANGLAIS Semaine du 13 au 19 septembre 2010

    E-Print Network [OSTI]

    Rennes, Université de

    , 2010 Environment ­ BP oil spill Gulf oil disaster: BP admits missing warning signs hours before blast's report on Deepwater Horizon rig explosion Culture ­ Music Far from the muddy crowds (By Leonie Cooper

  5. Gravitational wave signatures of the absence of an event horizon: Nonradial oscillations of a thin-shell gravastar

    SciTech Connect (OSTI)

    Pani, Paolo [Dipartimento di Fisica, Universita di Cagliari, and INFN sezione di Cagliari, Cittadella Universitaria 09042 Monserrato (Italy); Berti, Emanuele [Department of Physics and Astronomy, The University of Mississippi, University, Mississippi 38677-1848 (United States); Theoretical Astrophysics 350-17, California Institute of Technology, Pasadena, California 91125 (United States); Cardoso, Vitor [Department of Physics and Astronomy, The University of Mississippi, University, Mississippi 38677-1848 (United States); Centro Multidisciplinar de Astrofisica - CENTRA, Departamento de Fisica, Instituto Superior Tecnico, Av. Rovisco Pais 1, 1049-001 Lisboa (Portugal); Chen Yanbei; Norte, Richard [Theoretical Astrophysics 350-17, California Institute of Technology, Pasadena, California 91125 (United States)

    2009-12-15T23:59:59.000Z

    Gravitational waves from compact objects provide information about their structure, probing deep into strong-gravity regions. Here we illustrate how the presence or absence of an event horizon can produce qualitative differences in the gravitational waves emitted by ultracompact objects. In order to set up a straw-man ultracompact object with no event horizon, but which is otherwise almost identical to a black hole, we consider a nonrotating thin-shell model inspired by Mazur and Mottola's gravastar, which has a Schwarzschild exterior, a de Sitter interior and an infinitely thin shell with finite tension separating the two regions. As viewed from the external space-time, the shell can be located arbitrarily close to the Schwarzschild radius, so a gravastar might seem indistinguishable from a black hole when tests are only performed on its external metric. We study the linearized dynamics of the system, and, in particular, the junction conditions connecting internal and external gravitational perturbations. As a first application of the formalism we compute polar and axial oscillation modes of a thin-shell gravastar. We show that the quasinormal mode spectrum is completely different from that of a black hole, even in the limit when the surface redshift becomes infinite. Polar quasinormal modes depend on the equation of state of matter on the shell and can be used to distinguish between different gravastar models. Our calculations suggest that low-compactness gravastars could be unstable when the sound speed on the shell v{sub s}/c > or approx. 0.92.

  6. From philosophical questions of human purpose to practical ones on

    E-Print Network [OSTI]

    Ginzel, Matthew

    Welcome From philosophical questions of human purpose to practical ones on oil spills and other fOr research NanoProfessorProvidesBig NumbersonOilSpill As a mechanical engineering professor in the Birck of oil that had been gushing into the Gulf of Mexico since the April 20 Deep- water Horizon blowout

  7. Metagenomic analysis of microbial consortium from natural crude oil that seeps into the marine ecosystem offshore Southern California

    SciTech Connect (OSTI)

    Hawley, Erik R.; Piao, Hailan; Scott, Nicole M.; Malfatti, Stephanie; Pagani, Ioanna; Huntemann, Marcel; Chen, Amy; del Rio, Tijana G.; Foster, Brian; Copeland, A.; Jansson, Janet K.; Pati, Amrita; Gilbert, Jack A.; Tringe, Susannah G.; Lorenson, Thomas D.; Hess, Matthias

    2014-01-02T23:59:59.000Z

    Crude oils can be major contaminants of the marine ecosystem and microorganisms play a significant role in the degradation of the main constituents of crude oil. To increase our understanding of the microbial hydrocarbon degradation process in the marine ecosystem, we collected crude oil from an active seep area located in the Santa Barbara Channel (SBC) and generated a total of about 52 Gb of raw metagenomic sequence data. The assembled data comprised ~500 Mb, representing ~1.1 million genes derived primarily from chemolithoautotrophic bacteria. Members of Oceanospirillales, a bacterial order belonging to the Deltaproteobacteria, recruited less than 2% of the assembled genes within the SBC metagenome. In contrast, the microbial community associated with the oil plume that developed in the aftermath of the Deepwater Horizon (DWH) blowout in 2010, was dominated by Oceanospirillales, which comprised more than 60% of the metagenomic data generated from the DWH oil plume. This suggests that Oceanospirillales might play a less significant role in the microbially mediated hydrocarbon conversion within the SBC seep oil compared to the DWH plume oil. We hypothesize that this difference results from the SBC oil seep being mostly anaerobic, while the DWH oil plume is aerobic. Within the Archaea, the phylum Euryarchaeota, recruited more than 95% of the assembled archaeal sequences from the SBC oil seep metagenome, with more than 50% of the sequences assigned to members of the orders Methanomicrobiales and Methanosarcinales. These orders contain organisms capable of anaerobic methanogenesis and methane oxidation (AOM) and we hypothesize that these orders and their metabolic capabilities may be fundamental to the ecology of the SBC oil seep.

  8. The generalized second law for the interacting new agegraphic dark energy in a non-flat FRW universe enclosed by the apparent horizon

    E-Print Network [OSTI]

    K. Karami; A. Abdolmaleki

    2011-01-31T23:59:59.000Z

    We investigate the validity of the generalized second law of gravitational thermodynamics in a non-flat FRW universe containing the interacting new agegraphic dark energy with cold dark matter. The boundary of the universe is assumed to be enclosed by the dynamical apparent horizon. We show that for this model, the equation of state parameter can cross the phantom divide. We also present that for the selected model under thermal equilibrium with the Hawking radiation, the generalized second law is always satisfied throughout the history of the universe. Whereas, the evolution of the entropy of the universe and apparent horizon, separately, depends on the equation of state parameter of the interacting new agegraphic dark energy model.

  9. Hs@~7A Receding Horizon @)8f$K4p$E$/ ;k3P%U%#!<%I%P%C%/$K$D$$$F

    E-Print Network [OSTI]

    with the vision-based robot motion control via the nonlinear receding horizon control approach. We propose feedback control law. The control goal is to place the planar robot end-e#11;ector over a desired static. ;~9ot $K$*$$$F, M­8B6h4V [t; t +T ] $G:GE,2=LdBj$r2r$­, $=$N:]$N2r$H$7$F, :GE,@)8fB'u #3; (#28

  10. 3-D seismic surveys generate 5-D data volume. In order to estimate the horizons for interpretation and further processing, the traveltime picking needs to be performed on n-D subsets of this 5-D data volume (n5). Horizon

    E-Print Network [OSTI]

    Nicoli, Monica

    Abstract 3-D seismic surveys generate 5-D data volume. In order to estimate the horizons for interpretation and further processing, the traveltime picking needs to be performed on n-D subsets of this 5-D to support the interpreters in the estimation of the events by preserving their depth continuity. The HP

  11. Horizon 2020: Excellent Science

    E-Print Network [OSTI]

    De Cindio, Fiorella

    agriculture, marine and maritime research & the bioeconomy Secure, clean and efficient energy Smart, green

  12. Expanding Professional Horizons

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

    expands daily, by leaps and bounds - knowledge turnover must be accompanied by an infusion of new talent that both informs and is informed by existing, experienced staff. With...

  13. Screening Stringy Horizons

    E-Print Network [OSTI]

    Giribet, Gaston

    2015-01-01T23:59:59.000Z

    It has been argued recently that string theory effects qualitatively modify the effective black hole geometry experienced by modes with radial momentum of order $1/\\sqrt{\\alpha'}$. At tree level, these $\\alpha'$-effects can be explicitly worked out in two-dimensional string theory, and have a natural explanation in the T-dual description as coming from the integration of the zero-mode of the linear dilaton, what yields a contribution that affects the scattering phase-shift in a peculiar manner. It has also been argued that the phase-shift modification has its origin in a region of the moduli space that does not belong to the exterior black hole geometry, leading to the conclusion that at high energy the physics of the problem is better described by the dual model. Here, we elaborate on this argument. We consider the contribution of worldsheet instantons in the 2D Euclidean black hole sigma-model and study its influence on the phase-shift at high energy.

  14. Screening Stringy Horizons

    E-Print Network [OSTI]

    Gaston Giribet; Arash Ranjbar

    2015-04-20T23:59:59.000Z

    It has been argued recently that string theory effects qualitatively modify the effective black hole geometry experienced by modes with radial momentum of order $1/\\sqrt{\\alpha'}$. At tree level, these $\\alpha'$-effects can be explicitly worked out in two-dimensional string theory, and have a natural explanation in the T-dual description as coming from the integration of the zero-mode of the linear dilaton, what yields a contribution that affects the scattering phase-shift in a peculiar manner. It has also been argued that the phase-shift modification has its origin in a region of the moduli space that does not belong to the exterior black hole geometry, leading to the conclusion that at high energy the physics of the problem is better described by the dual model. Here, we elaborate on this argument. We consider the contribution of worldsheet instantons in the 2D Euclidean black hole sigma-model and study its influence on the phase-shift at high energy.

  15. LLNL 1981: technical horizons

    SciTech Connect (OSTI)

    Not Available

    1981-07-01T23:59:59.000Z

    Research programs at LLNL for 1981 are described in broad terms. In his annual State of the Laboratory address, Director Roger Batzel projected a $481 million operating budget for fiscal year 1982, up nearly 13% from last year. In projects for the Department of Energy and the Department of Defense, the Laboratory applies its technical facilities and capabilities to nuclear weapons design and development and other areas of defense research that include inertial confinement fusion, nonnuclear ordnances, and particle-beam technology. LLNL is also applying its unique experience and capabilities to a variety of projects that will help the nation meet its energy needs in an environmentally acceptable manner. A sampling of recent achievements by LLNL support organizations indicates their diversity. (GHT)

  16. Expanding Professional Horizons

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField8,Dist. Category UC-l 1,Energy Consumers | Department ofa KeyErin *

  17. Phase III Early Restoration Project Alabama Florida Louisiana Mississippi Texas

    E-Print Network [OSTI]

    , two making approximately three trips per day, for approximately 15 weeks during peak tourist season to be reduced during the off-peak winter season. To support the project, passenger queuing areas ­ one Horizon oil spill. ESTIMATED COST The estimated amount of Deepwater Horizon Oil Spill early restoration

  18. WRITTEN STATEMENT OF DOUGLAS HELTON

    E-Print Network [OSTI]

    in the response to the Deepwater Horizon BP oil spill and NOAA's ideas for activities to improve future response Horizon oil spill, for which 1 #12;BP is a responsible party, and opportunities to strengthen the Federal the opportunity to discuss the critical roles NOAA serves during oil spills and the importance of our

  19. WRITTEN STATEMENT OF DR. LARRY ROBINSON

    E-Print Network [OSTI]

    's) role in the response to the Deepwater Horizon oil spill. My name is Dr. Larry Robinson and I am Horizon oil spill. NOAA is fully mobilized and working tirelessly 24/7 to lessen impacts on the Gulf Coast NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION U.S. DEPARTMENT OF COMMERCE HEARING ON COMBATING THE BP OIL

  20. WRITTEN STATEMENT OF DOUGLAS HELTON

    E-Print Network [OSTI]

    Horizon oil spill, for which BP is a responsible party; NOAA's role in oil spill research Administration's (NOAA's) role in the response to the Deepwater Horizon oil spill and NOAA's role in oil spill AND TECHNOLOGY NEEDS FOR OIL SPILL RECOVERY BEFORE THE SUBCOMMITTEE ON ENERGY AND ENVIRONMENT COMMITTEE

  1. The gauge factor increase and the hypothetical emerging of the matter objects on the horizon in the standard model of universe

    E-Print Network [OSTI]

    V. Skalsky

    2000-09-25T23:59:59.000Z

    In the standard model of universe the increase in mass of our observed expansive and isotropic relativistic Universe is explained by the hypothetical assumption of matter objects emerging on the horizon (of the most remote visibility). However, the mathematical-physical analysis of the increase of Universe gauge factor shows that this hypothetical assumption is non-compatible with the variants of the standard model of universe by which - according to the standard model of universe - can be described the expansive evolution of the Universe.

  2. Gravitational wave signatures of the absence of an event horizon. II. Extreme mass ratio inspirals in the spacetime of a thin-shell gravastar

    SciTech Connect (OSTI)

    Pani, Paolo [Dipartimento di Fisica, Universita di Cagliari, and INFN sezione di Cagliari, Cittadella Universitaria 09042 Monserrato (Italy); Berti, Emanuele [Department of Physics and Astronomy, University of Mississippi, University, Mississippi 38677-1848 (United States); Theoretical Astrophysics 350-17, California Institute of Technology, Pasadena, California 91125 (United States); Cardoso, Vitor [Department of Physics and Astronomy, University of Mississippi, University, Mississippi 38677-1848 (United States); Centro Multidisciplinar de Astrofisica-CENTRA, Department de Fisica, Instituto Superior Tecnico, Av. Rovisco Pais 1, 1049-001 Lisboa (Portugal); Chen Yanbei; Norte, Richard [Theoretical Astrophysics 350-17, California Institute of Technology, Pasadena, California 91125 (United States)

    2010-04-15T23:59:59.000Z

    We study gravitational wave emission from the quasicircular, extreme mass ratio inspiral of compact objects of mass m{sub 0} into massive objects of mass M>>m{sub 0} whose external metric is identical to the Schwarzschild metric, except for the absence of an event horizon. To be specific we consider one of the simplest realizations of such an object: a nonrotating thin-shell gravastar. The power radiated in gravitational waves during the inspiral shows distinctive peaks corresponding to the excitation of the polar oscillation modes of the gravastar. For ultracompact gravastars the frequency of these peaks depends mildly on the gravastar compactness. For masses M{approx}10{sup 6}M{sub {center_dot}}the peaks typically lie within the optimal sensitivity bandwidth of the Laser Interferometer Space Antenna, potentially providing a unique signature of the horizonless nature of the central object. For relatively modest values of the gravastar compactness the radiated power has even more peculiar features, carrying the signature of the microscopic properties of the physical surface replacing the event horizon.

  3. 230 GHz VLBI observations of M87: event-horizon-scale structure at the enhanced very-high-energy $\\rm \\gamma$-ray state in 2012

    E-Print Network [OSTI]

    Akiyama, Kazunori; Fish, Vincent L; Doeleman, Sheperd S; Broderick, Avery E; Dexter, Jason; Hada, Kazuhiro; Kino, Motoki; Nagai, Hiroshi; Honma, Mareki; Johnson, Michael D; Algaba, Juan C; Asada, Keiichi; Brinkerink, Christiaan; Blundell, Ray; Bower, Geoffrey C; Cappallo, Roger; Crew, Geoffrey B; Dexter, Matt; Dzib, Sergio A; Freund, Robert; Friberg, Per; Gurwell, Mark; Ho, Paul T P; Inoue, Makoto; Krichbaum, Thomas P; Loinard, Laurent; MacMahon, David; Marrone, Daniel P; Moran, James M; Nakamura, Masanori; Nagar, Neil M; Ortiz-Leon, Gisela; Plambeck, Richard; Pradel, Nicolas; Primiani, Rurik A; Rogers, Alan E E; Roy, Alan L; SooHoo, Jason; Tavares, Jonathan-Leon; Tilanus, Remo P J; Titus, Michael; Wagner, Jan; Weintroub, Jonathan; Yamaguchi, Paul; Young, Ken H; Zensus, Anton; Ziurys, Lucy M

    2015-01-01T23:59:59.000Z

    We report on 230 GHz (1.3 mm) VLBI observations of M87 with the Event Horizon Telescope using antennas on Mauna Kea in Hawaii, Mt. Graham in Arizona and Cedar Flat in California. For the first time, we have acquired 230 GHz VLBI interferometric phase information on M87 through measurement of closure phase on the triangle of long baselines. Most of the measured closure phases are consistent with 0$^{\\circ}$ as expected by physically-motivated models for 230 GHz structure such as jet models and accretion disk models. The brightness temperature of the event-horizon-scale structure is $\\sim 1 \\times 10^{10}$ K derived from the compact flux density of $\\sim 1$ Jy and the angular size of $\\sim 40 $ $\\rm \\mu$as $\\sim$ 5.5 $R_{{\\rm s}}$, which is broadly consistent with the peak brightness of the radio cores at 1-86 GHz located within $\\sim 10^2$ $R_{{\\rm s}}$. Our observations occurred in the middle of an enhancement in very-high-energy (VHE) $\\rm \\gamma$-ray flux, presumably originating in the vicinity of the centr...

  4. Limitations of extended reach drilling in deepwater 

    E-Print Network [OSTI]

    Akinfenwa, Akinwunmi Adebayo

    2000-01-01T23:59:59.000Z

    bore stability was 150 m /g shale strength, which is a pretty stable shale. The minimum mud weight was determined by thc pore pressure or collapse pressure with a trip margin of 0. 2 ppg. This is a function of the fracture pressure with a fracture...

  5. Deepwater Internal Wave Study and Application

    E-Print Network [OSTI]

    Jiang, Lei

    2013-12-10T23:59:59.000Z

    conforming to the physics of internal waves and to study the effects on offshore drilling semisubmersibles, different types of offshore hull forms and riser systems, including the large diameter cold water pipe of floating Ocean Thermal Energy Conversion...

  6. ultra_deepwater | netl.doe.gov

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del SolStrengtheningWildfires mayYuan T.ExternalscriptEnv LANL NationalR I N I T Y

  7. deepwater_technology | netl.doe.gov

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del SolStrengtheningWildfires mayYuan T. Lee's

  8. Deepwater_Response.pdf | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed off Energy.gov. Are you0and Transparency,8-9612-985-2007SupplementalDanielDay 1:Energy

  9. Deepwater Wind Farm | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualPropertyd8c-a9ae-f8521cbb8489 No revision hasda62829c05b NoCounty, Nevada | OpenDeepi has

  10. Mateas, M. 2005. Procedural Literacy: Educating the New Media Practitioner. On The Horizon. Special Issue. Future of Games, Simulations and Interactive Media in Learning Contexts, v13, n1 2005.

    E-Print Network [OSTI]

    Mateas, Michael

    Mateas, M. 2005. Procedural Literacy: Educating the New Media Practitioner. On The Horizon. Special Literacy: Educating the New Media Practitioner Michael Mateas Abstract For humanities scholars, artists on the theoretical and aesthetic concerns of new media. New media scholars and practitioners, including game

  11. txH2O: Volume 6, Number 2 (Complete) 

    E-Print Network [OSTI]

    Texas Water Resources Institute

    2011-01-01T23:59:59.000Z

    drop in the bucket? Texas scientists on the real effects of the Deepwater Horizon oil spill 7 I Developing solutions for sustainable living?the Urban Living Laboratory The world?s largest ?living laboratory? for research on green living 10 I... 26 I Controlling invasive weed Center begins studying giant salvinia-eating weevils 28 I TWRI Briefs 2 tx H2O Winter 2011 Story by Leslie Lee Texas scientists on the real e#31;ects of the Deepwater Horizon oil spill Environmental disaster...

  12. txH20: Volume 6, Number 2 (Complete) 

    E-Print Network [OSTI]

    Wythe, Kathy

    2011-01-01T23:59:59.000Z

    drop in the bucket? Texas scientists on the real effects of the Deepwater Horizon oil spill 7 I Developing solutions for sustainable living?the Urban Living Laboratory The world?s largest ?living laboratory? for research on green living 10 I... 26 I Controlling invasive weed Center begins studying giant salvinia-eating weevils 28 I TWRI Briefs 2 tx H2O Winter 2011 Story by Leslie Lee Texas scientists on the real e#31;ects of the Deepwater Horizon oil spill Environmental disaster...

  13. American Institute of Aeronautics and Astronautics Lean Blowout Detection in a Single Nozzle Swirl Cup Combustor

    E-Print Network [OSTI]

    Seitzman, Jerry M.

    Cup Combustor S. Nair* , T. M. Muruganandam* , R. Olsen , A. Meyers , J. Seitzman§ , B. Zinn** , T be used to monitor the proximity of a combustor to blowoff using measurements of the flame's acoustic and chemiluminescence signature. Data was acquired from a commercial single nozzle, swirl cup combustor fueled with Jet

  14. Development and assessment of electronic manual for well control and blowout containment

    E-Print Network [OSTI]

    Grottheim, Odd Eirik

    2005-11-01T23:59:59.000Z

    .................................................................. 122 6.4.5 Dual-gradient and Managed Pressure Drilling in Ultradeep Water .......... 123 SubSea Mudlift Drilling .............................................................................. 124 Controlled Mud Cap and Low Riser Return... System..................................... 126 New Approach: SubSea Mudpump Kill....................................................... 128 VII DISCUSSION, CONCLUSIONS, AND RECOMMENDATIONS ................. 129 7.1 Development...

  15. Well blowout rates in California Oil and Gas District 4--Update and Trends

    E-Print Network [OSTI]

    Benson, Sally M.

    2010-01-01T23:59:59.000Z

    geologic assessment of oil and gas in the San Joaquin BasinRates in California Oil and Gas District 4 – Update andoccurring in California Oil and Gas District 4 during the

  16. Spatiotemporal model for the progression of sand blowouts Hezi Yizhaq1

    E-Print Network [OSTI]

    Ashkenazy, Yossi "Yosef"

    , Noam Levin2 and Haim Tsoar3 1 Solar energy and Environmental Physics, BIDR, Ben-Gurion University in Australia. Introduction. ­ Sand dunes cover a vast area of Earth land surface. Their formation and dynamics

  17. Natural marine seepage blowout: Contribution to atmospheric Ira Leifer,1,2

    E-Print Network [OSTI]

    Luyendyk, Bruce

    . Simulations suggest a 1.1% gas loss to dissolution compared to $10% loss for a typical low-flux bubble plume than carbon dioxide, CO2 [Khalil and Rasmussen, 1995]. Its atmospheric mixing ratio has more than constrained. [4] Seepage emission estimates are mostly based on observations of gentle bubble emanations [e

  18. Well blowout rates in California Oil and Gas District 4--Update and Trends

    E-Print Network [OSTI]

    Benson, Sally M.

    2010-01-01T23:59:59.000Z

    Oil and Gas District 4 from 1991 to 2005: implications for geological storage of carbon dioxide, Environmental Geology ,

  19. Blowout bifurcations and the onset of magnetic activity in turbulent dynamos David Sweet,1

    E-Print Network [OSTI]

    Lathrop, Daniel P.

    Ott,1, * John M. Finn,2 Thomas M. Antonsen, Jr.,1, * and Daniel P. Lathrop1 1 Institute for Plasma Research and Department of Physics, University of Maryland, College Park, Maryland 20742 2 Los Alamos

  20. Blowout bifurcations and the onset of magnetic dynamo action* David Sweet, Edward Ott,,a)

    E-Print Network [OSTI]

    Lathrop, Daniel P.

    . Antonsen, Jr.,a) and Daniel P. Lathrop Institute for Plasma Research and Department of Physics, University

  1. Ultrapdeep water blowouts: COMASim dynamic kill simulator validation and best practices recommendations

    E-Print Network [OSTI]

    Noynaert, Samuel F.

    2005-02-17T23:59:59.000Z

    The petroleum industry is in a constant state of change. Few industries have advanced as far technologically as the petroleum industry has in its relatively brief existence. The produced products in the oil and gas industry are finite. As such...

  2. Well blowout rates in California Oil and Gas District 4--Update and Trends

    E-Print Network [OSTI]

    Benson, Sally M.

    2010-01-01T23:59:59.000Z

    Three-quarters of the oil production in California was fromThree-fifths of the oil production in the District was viameasured in offshore oil production in the Outer Continental

  3. Well blowout rates in California Oil and Gas District 4--Update and Trends

    E-Print Network [OSTI]

    Benson, Sally M.

    2010-01-01T23:59:59.000Z

    developed for CO2- enhanced oil recovery, SPE Paper 112924 ,oil production in the District was via thermally enhanced recovery.

  4. Active Control of Lean Blowout in a Swirl-Stabilized Combustor Using a Tunable Diode Laser

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProducts (VAP) VAP7-0973 1 IntroductionActinide Chemistry Turbines *

  5. Technology on the Horizon & Over the Horizon

    U.S. Energy Information Administration (EIA) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocks Nov-14Total DeliveredPrincipalNumber of Water8 WaterDonald

  6. Research Infrastructures in Horizon 2020

    E-Print Network [OSTI]

    Schettini, Raimondo

    , sustainable agriculture, marine - maritime research, bio-economy Secure, clean and efficient energy Smart

  7. The New Horizons of Bioenergy

    ScienceCinema (OSTI)

    None

    2013-04-19T23:59:59.000Z

    At the Office of Energy Efficiency and Renewable Energy's "Biomass 2011" conference, Argonne researcher Seth Snyder spoke with DOE Biomass Program head, Paul Bryan. In this conversation, Snyder explains the process of biochemical conversion, and talks about Argonne's patented resin wafer technology. The resin wafer electrodeionization technology may help significantly reduce the cost of producing clean energy and of the chemicals and water used in industry. The separations technology can also process biomass-based feedstocks into biofuels and chemicals.

  8. Horizon thermodynamics and composite metrics

    E-Print Network [OSTI]

    Lorenzo Sindoni

    2012-11-12T23:59:59.000Z

    We examine the conditions under which the thermodynamic behaviour of gravity can be explained within an emergent gravity scenario, where the metric is defined as a composite operator. We show that due to the availability of a boundary of a boundary principle for the quantum effective action, Clausius-like relations can always be constructed. Hence, any true explanation of the thermodynamic nature of the metric tensor has to be referred to an equilibration process, associated to the presence of an H-theorem, possibly driven by decoherence induced by the pregeometric degrees of freedom, and their entanglement with the geometric ones.

  9. Archaeological Horizons in Central California

    E-Print Network [OSTI]

    Heizer, Robert F.; Fenenga, Franklin

    1939-01-01T23:59:59.000Z

    1935 A Yokuts Cemetery at Elk Hills. Southwest Museum, The18, 1937. See also the Elk Hills site report (Walker, 1935)

  10. Multi-horizon stochastic programming

    E-Print Network [OSTI]

    2013-08-26T23:59:59.000Z

    Aug 26, 2013 ... different time scales: while planning and building the infrastructure involves strate

  11. Particle Physics at Discovery's Horizon

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)IntegratedSpeeding access toTestPhysicsParticipants Participants Largeuslhc.us

  12. Your Horizons Conference April 6

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over OurThe Iron SpinPrincetonUsingWhatY-12 recognizedThesis Prize |gets young women

  13. Researcher warns that current could still bring oil to area

    E-Print Network [OSTI]

    Belogay, Eugene A.

    sludge of the Deepwater Horizon oil spill, Dr. Tamara Frank told a Delray Beach audienceResearcher warns that current could still bring oil to area September 08, 2010|DAVID DIPINO that the disaster was "the biggest peacetime oil spill ever" and that local habitats are not yet out of harm's way

  14. An empirical approach to derive MODIS ocean color patterns under severe sun glint

    E-Print Network [OSTI]

    Meyers, Steven D.

    ] Oil tracking in the Gulf of Mexico in response to the Deepwater Horizon accident requires timely al., 2004, and references therein]. The data products, starting from the CZCS (1978­1986) era development have focused on accurate, validated biooptical data products such as surface chlorophylla

  15. # Title Authors Release of gas phase species from the photolysis of thin

    E-Print Network [OSTI]

    Nizkorodov, Sergey

    compounds measured in the lower troposphere around the Deepwater Horizon oil spill site (Gulf of Mexico.M., Paulson S.E. 13 Oxygen isotopic anomaly in secondary carbonates: evidence of anthropogenic pollution Chong., Finlayson-Pitts B.J. 22 CARDS analyzers for air pollution monitoring. Hargrove, J.M., Gundersen, J, Hargrove

  16. Chapter 14 Water Pollution Factory-style hog farms in

    E-Print Network [OSTI]

    Pan, Feifei

    were polluted by 2010 deepwater horizon oil spill. #12;Oil-drilling Platforms in the Gulf of Mexico #12Chapter 14 Water Pollution #12;Factory-style hog farms in North Carolina Each pig produces, September 1999. #12;Hogs killed by flooding #12; Water pollution Common water pollutants Treating water

  17. If you would like to meet with the seminar speaker, please contact Connie Foster at 44773 or cfoster@purdue.edu Distinguished Lecture Series

    E-Print Network [OSTI]

    of Mexico" Presented by Terry Hazen, Ph.D. U.S. Department of Energy Distinguished? If the Gulf of Mexico oil spill is any indication, then the answer seems to be yes. The explosion on April 20, 2010 at the BP-leased Deepwater Horizon

  18. Class not > 1% relative

    E-Print Network [OSTI]

    Weston, Ken

    into the Gulf of Mexico (GOM). Knowledge of the composition of this crude oil is instrumental in determining its on the Deepwater Horizon (DWH) drilling unit caused the subsequent release of ~5 million barrels of crude oil fate in the aquatic environment. The GOM has rich and diverse marine fishing reserve and it supports

  19. *Scholarly: Information produced by subject experts for an academic audience. Quick Guide

    E-Print Network [OSTI]

    Ishida, Yuko

    Reserves Catalog Yes Minute(s) Hour(s) Day(s) Week(s) Month(s) Year(s) Event: On April 20th 2010, an explosion on BP's Deepwater Horizon rig off the coast of Louisiana kills 11 workers and begins spilling oil into the Gulf of Mexico... Radio/TV Blogs Newspapers Magazines Academic Journals Books News sites Wikis Trade

  20. Oil Spill Detection and Mapping Along the Gulf of Mexico Coastline Based on Imaging Spectrometer Data 

    E-Print Network [OSTI]

    Arslan, Meryem Damla

    2013-11-27T23:59:59.000Z

    The Deepwater Horizon oil spill in the Gulf of Mexico between April and July 2010 demonstrated the importance of synoptic oil-spill monitoring in coastal environments via remote-sensing methods. This study focuses on terrestrial oil-spill detection...

  1. GEOPHYSICAL RESEARCH LETTERS, VOL. 40, 61716175, doi:10.1002/2013GL058624, 2013 Drifter motion in the Gulf of Mexico constrained by altimetric

    E-Print Network [OSTI]

    Ozgökmen, Tamay M.

    observed in satellite images of the Gulf of Mexico (GoM). A recent example is the Deepwater Horizon oil in the Gulf of Mexico constrained by altimetric Lagrangian coherent structures M. J. Olascoaga,1 F. J. Beron from the Grand Lagrangian Deployment (GLAD) in the Gulf of Mexico. This material attraction is largely

  2. P h y s i c a l O c e a n o g r a p h y D i v i s i o n A Research Ocean Data Assimilation System for Improving

    E-Print Network [OSTI]

    on 9 flight days in the eastern interior Gulf of Mexico during the DWH oil spill. Ocean temperature system of the model. Tests have been performed in a 0.08° Gulf of Mexico domain by comparing ocean analyses to observations taken by AOML in response to the Deepwater Horizon oil spill. The new DA system

  3. Conceptual Framework for the Use of Fish Parasites as Bioindicators of Acute and Chronic

    E-Print Network [OSTI]

    Kane, Andrew S.

    Environmental Perturbation After the 2010 Deepwater Horizon Oil Spill in the Gulf of Mexico 1Auburn University: Yucatan, Gulf of Mexico- exploratory oil well Ixtoc explodes, sinks (10.8, 5%) March 24th, 1989: Prince: Gulf of Mexico- oil tanker Megaborg fire (378, 189%) January 21st, 1991: Kuwait- Gulf War I, Iraqi

  4. Swartz: Oil on the coasts? 'We will never, ever get By SALLY SWARTZ

    E-Print Network [OSTI]

    Belogay, Eugene A.

    Swartz: Oil on the coasts? 'We will never, ever get it off.' By SALLY SWARTZ Posted: 7:58 p the Deepwater Horizon oil spill for a long time, a geologist who worked for the oil industry told Martin County great, Mr. Egan said. "But scratch the surface of the sand, and you hit tar. Oil got into the food chain

  5. J. Fluid Mech. (2012), vol. 690, pp. 571606. c Cambridge University Press 2011 571 doi:10.1017/jfm.2011.476

    E-Print Network [OSTI]

    McLaughlin, Richard M.

    are routinely obtained. A lubrication model is developed for both a two-dimensional geometry a comparison to that scenario. Key words: lubrication theory, parametric instability, stratified flows 1 trapped oil plumes from the Deepwater Horizon oil spill in the Gulf of Mexico in 2010 and the accumulation

  6. Interactions between Oil-Spill Pollutants and Natural Stressors Can Compound Ecotoxicological Effects

    E-Print Network [OSTI]

    Whitehead, Andrew

    SYMPOSIUM Interactions between Oil-Spill Pollutants and Natural Stressors Can Compound productive habitats on earth, yet are at risk from human activities including marine oil spills. The 2010 Deepwater Horizon oil spill contaminated hundreds of kilometers of coastal habitat, particularly

  7. NATURE PHYSICS | VOL 7 | MARCH 2011 | www.nature.com/naturephysics 183 The accusation was made loud and clear

    E-Print Network [OSTI]

    Loss, Daniel

    ." He gave Director of the Office of Science and Technology Policy John Holdren the task of fleshing out of science has been seen to persist with the new administration. In the aftermath of the Deepwater Horizon Association, in favour of lower estimates; and that the whole process for the approval of offshore drilling

  8. NOAA Fisheries Service's Visual Health Assessments of the Resident Community of Bottlenose Dolphins in the Perdido Bay Complex Near Orange Beach, AL

    E-Print Network [OSTI]

    the dolphins are exhibiting any effects from the Deepwater Horizon BP oil spill. These long-term resident the oil spill crisis and into the future. The visual health assessment effort requires nearshore boat, or if there are any potential long-term impacts related to the oil spill event. To date, two dolphins have stranded

  9. 5/12/10 8:53 AMPlan B in the Gulf Tribuna Libre Page 1 of 4http://www.almendron.com/tribuna/29942/plan-b-in-the-gulf/

    E-Print Network [OSTI]

    Hazen, Terry

    Horizon oil spill -- placing a huge metal dome over the leak -- had failed. With the oil slick now washing YORK TIMES, 11/05/10): Over the weekend BP learned that its latest effort at stanching the Deepwater toxicologist and author of Not One Drop: Betrayal and Courage in the Wake of the Exxon Valdez Oil Spill. One

  10. Preliminary Report from the WHOI Flow Rate Measurement Group Prepared by Team Leader Richard Camilli, Woods Hole Oceanographic Institution

    E-Print Network [OSTI]

    Whitcomb, Louis L.

    of the DEEPWATER HORIZON oil spill. As a part of this effort a team of experts led by WHOI and assisted by experts #35 on May 31, 2010. The ROV was operated by Oceaneering International and supplied to the team by BP

  11. Research Overview of the Consortium for Advanced Research on Transport of Hydrocarbon in the

    E-Print Network [OSTI]

    Ozgökmen, Tamay M.

    When the Deepwater Horizon (DWH) oil drilling platform at BP's Macondo well exploded and sank on April 20, 2010, an unprecedented oil spill resulted. Unlike previous spills, the source was located incident was the largest accidental oil spill into marine waters with an estimated 4.4 million barrels

  12. 12 CHAPTER 12: PROPOSED PHASE III EARLY RESTORATION PROJECTS: Introduction

    E-Print Network [OSTI]

    to the Deepwater Horizon Oil Spill, the Florida Department of Environmental Protection and the Florida Fish and that was impacted by response and SCAT activities related to the Spill. In addition, DOI and NOAA identified services resulting from the Spill. Within the remainder of this chapter, there is a subsection for each

  13. Sharing Smart Environment Assets in Dynamic Multi-Partner Scenarios

    E-Print Network [OSTI]

    Preece, Alun

    in during the Haiti earthquake1 , the damaged utility facilities in the BP oil spill case2 , and the Fukushima 1Haiti Earthquake Response: Context Analysis - http://tinyurl.com/k8cffr7 2Deepwater Horizon oil spill - http://tinyurl.com/ke27b6c Daiichi nuclear disaster3 , demonstrated the need for emer- gency

  14. 6/10/12 Technique Devised to Measure Pipeline Gas Bubbles | Science Business 1/2sciencebusiness.technewslit.com/?p=9481

    E-Print Network [OSTI]

    Sóbester, András

    of the blow out preventer was a key factor in the extensive damage caused by the BP/Deepwater Horizon oil spill in the Gulf of Mexico in 2010. Current methods for estimating bubble size distribution involve for Oil and Gas Eight Teams Funded for Research on Gulf Oil Spill Impact * * * NEW PRODUCTS ENGINEERING

  15. Fish exposed to BP oil spill 'swim slower' Study finds the speed of mahi-mahi exposed to BP's Gulf of

    E-Print Network [OSTI]

    Grosell, Martin

    the 2010 BP Deepwater Horizon spill, swim nearly half as fast as their unaffected counterparts. "The worryFish exposed to BP oil spill 'swim slower' Study finds the speed of mahi-mahi exposed to BP's Gulf in the gulf shortly after the spill, which oil company BP disputed. "The study does not provide any evidence

  16. hboi.fau.edu P. 1 Drill for Oil Spill Answers

    E-Print Network [OSTI]

    Fernandez, Eduardo

    hboi.fau.edu P. 1 Drill for Oil Spill Answers Dr. Peter McCarthy examines the differences, Deepwater Horizon explosion, oil gushed into the Gulf of Mexico for nearly three months before a temporary projects received Florida Institute of Oceanography approval in August for BP rapid response research

  17. Undersea researchers find little oil spill damage so far By KRISTA KLAUS | News Channel 8

    E-Print Network [OSTI]

    Belogay, Eugene A.

    of the Gulf of Mexico in the wake of BP's massive Deepwater Horizon oil spill made a brief stopover todayUndersea researchers find little oil spill damage so far By KRISTA KLAUS | News Channel 8 Published life before and after the largest oil spill in the history of the Gulf of Mexico. #12;"This

  18. Near Shore Submerged Oil Assessment

    E-Print Network [OSTI]

    Near Shore Submerged Oil Assessment September 2010 In the context of the BP Deepwater Horizon (DWH) oil spill in the Gulf of Mexico, submerged oil refers to near shore oil which has picked up sediments from very different physical and chemical processes. In this spill, the oil was released more than 5

  19. This research investigates the distribution, spatial range and transformation of spilled oils and their chemical and microbial

    E-Print Network [OSTI]

    and their chemical and microbial impacts on coastal marshes months after the 2010 BP Macondo-1 well oil spill. Very and Degradation of Deepwater Horizon Spilled Oil in Coastal Marsh Sediments and Pore-Water Michael Natter1, JeffThis research investigates the distribution, spatial range and transformation of spilled oils

  20. Heart Defects in Gulf Tuna Seen Tied to 2010 BP Oil Spill

    E-Print Network [OSTI]

    Grosell, Martin

    Heart Defects in Gulf Tuna Seen Tied to 2010 BP Oil Spill By Jim Efstathiou Jr. Mar 25, 2014 12 the Deepwater Horizon spill. The findings include contributions from researchers at NOAA, Stanford University:00 AM ET Photographer: Gerard Soury Atlantic Bluefin Tuna. Crude oil from BP Plc (BP/)'s 2010 Gulf

  1. 5/11/10 7:21 AMOp-Ed Contributors -Plan B in the Gulf -NYTimes.com Page 1 of 3http://www.nytimes.com/2010/05/11/opinion/11oped2.html?sq=hazen&st=cse&scp=1&pagewanted=print

    E-Print Network [OSTI]

    Hazen, Terry

    the weekend BP learned that its latest effort at stanching the Deepwater Horizon oil spill -- placing a huge catastrophes. Avoid Dispersants ONE of the oil industry's favorite tools in fighting oil spills is chemical the Exxon Valdez spill in 1989, came with warning labels: "prevent liquid from entering sewers, watercourses

  2. From: Linda Thrane [mailto:thrane@rice.edu] Sent: Friday, June 04, 2010 3:32 PM

    E-Print Network [OSTI]

    Nagarajaiah, Satish

    . · As the Deepwater Horizon disaster and resulting oil spill made local, national and international headlines in May placements last month, thanks to your willingness to share your expertise to help the media report on the BP oil spill in the Gulf. While that number itself is impressive, so is the variety of placements

  3. www.sciencemag.org SCIENCE VOL 331 4 FEBRUARY 2011 537 POLICYFORUM

    E-Print Network [OSTI]

    Florida, University of

    www.sciencemag.org SCIENCE VOL 331 4 FEBRUARY 2011 537 POLICYFORUM T he 2010 BP Deepwater Horizon in the National Commission report on the BP spill (2) released 11 January, "Scien- tists simply do not yet know this goal. For example, the BP spill may have had a substantial impact on Atlan- tic bluefin tuna (Thunnus

  4. An exact scalar field inflationary cosmological model which solves Cosmological constant problem and dark matter problem in addition to Horizon and Flatness problems and other problems of inflationary cosmology

    E-Print Network [OSTI]

    Debasis Biswas

    2011-12-11T23:59:59.000Z

    An exact scalar field cosmological model is constructed from the exact solution of the field equations. The solutions are exact and no approximation like slow roll is used. The model gives inflation, solves horizon and flatness problems. The model also gives a satisfactory estimate of present vacuum energy density and solves cosmological constant problem of 120 orders of magnitude discrepancy of vacuum energy density. Further, this model predicts existence of dark matter/energy and gives an extremely accurate estimate of present energy density of dark matter and energy. Alongwith explanations of graceful exit, radiation era, matter domination, this model also indicates the reason for present accelerated state of the universe. In this work a method is shown following which one can construct an infinite number of exact scalar field inflationary cosmological models.

  5. Ultra-Deepwater Advisory Committee Elena Melchert Acting Designated...

    Office of Environmental Management (EM)

    to be placed in the laterals for real time data gathering. * Working prototype of the low power flow control and data acquisition-transmission system was developed & lab tested,...

  6. BOEMRE 2010-041 Study of Deepwater Currents

    E-Print Network [OSTI]

    Rhode Island, University of

    Program Information System (ESPIS). You will be able to obtain this report also from the National of Ocean Energy Management, National Technical Information Service Regulation, and Enforcement 5285 Port of the Interior Bureau of Ocean Energy Management, Regulation and Enforcement Gulf of Mexico OCS Region #12;OCS

  7. Modal Dynamics and Stability of Large Multi-megawatt Deepwater...

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

    and O&M, while maintaining or increasing energy production. A vertical-axis wind turbine (VAWT) rotor configuration offers a potential transformative technology solution...

  8. Experimental and numerical analysis of a deepwater mini-TLP

    E-Print Network [OSTI]

    Guichard, Aurelien

    2001-01-01T23:59:59.000Z

    -domain statistics and dimensionless ratios are used to characterize the environmental design sea conditions. Similar methods are utilized to examine the critical issues of the clearance between the wave train crests and the underside of the platform's deck...

  9. Sohio moves ahead on deep-water development

    SciTech Connect (OSTI)

    Not Available

    1985-05-01T23:59:59.000Z

    Sohio Petroleum Company is developing its oil and natural gas find on its East Breaks Block 165 lease in the Gulf of Mexico with a conventional bottom-founded steel structure installed in 860 feet of water. Water depths range from 500 to 1200 feet. The platform will be a single-piece steel structure equipped with two drilling rigs and accomodating 40 well slots. Initial production facilities on the structure are designed for up to 20,000 bopd and 50MMcfd of gas. Plans call for exploratory drilling from the structure to test additional fault segments. If successful, the size of the structure is sufficient to handle additional wells and added production capacity.

  10. Epifaunal Assemblages on Deep-water Corals in Roatan, Honduras

    E-Print Network [OSTI]

    Lavelle, Katherine

    2012-10-30T23:59:59.000Z

    45 Discussion 48 References 51 Summary 53 Appendices 57 v List of Tables Table 1. Absolute abundance of coral morphospecies at study sites (AKR= Anthony?s Key, GBB= Gibson Bight..., HMB= Half Moon Bay, LBE= Luna Beach, LWR= Lawson?s Rock, OLS= Old Loafer?s, SDM= Sueno del Mar, SDR= Sueno del Bahia). Table 2. Absolute abundance of epifaunal species at study sites (AKR= Anthony?s Key, GBB= Gibson Bight, HMB= Half Moon Bay, LBE...

  11. Ultra-Deepwater and Unconventional Natural Gas and Other Petroleum...

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

    guided by the results of roadmapping exercises and ongoing discussion with industry and university research partners. Complementary research focus areas includes studies related...

  12. FE's Ultra-Deepwater Program focuses on spill prevention, safety...

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

    resources comprise 25 percent (about 4.6 billion barrels) of total proved crude oil reserves in the lower 48 states. Annually, they account for about 20 percent of total domestic...

  13. Mississippi Canyon 252 Incident NRDA Tier 1 for Deepwater Communities

    E-Print Network [OSTI]

    Resource Damage Assessment. Each Party reserves its right to produce its own independent interpretation Statement The northern Gulf of Mexico (GOM) is a geologically diverse basin, described as the most complex, and are visible on Google Earth. With 3D seismic data obtained by the oil and gas industry for geophysical

  14. Sandia National Laboratories: deep-water multiple-megawatt VAWT

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

    vertical-axis wind turbines (VAWTs). This analysis uses a 5 MW VAWT topside design envelope created by Sandia to compare floating platform options for each turbine in the...

  15. Development of design tool for statically equivalent deepwater mooring systems

    E-Print Network [OSTI]

    Udoh, Ikpoto Enefiok

    2009-05-15T23:59:59.000Z

    tests is the depth and spatial limitations in wave basins. It is therefore important to design and build equivalent mooring systems to ensure that the static properties (global restoring forces and global stiffness) of the prototype floater are matched...

  16. The Temperature Prediction in Deepwater Drilling of Vertical Well 

    E-Print Network [OSTI]

    Feng, Ming

    2012-07-16T23:59:59.000Z

    .................................................................................................. 30 3.4 Geothermal Gradient ................................................................................ 30 3.5 Overall Heat Transfer Coefficient ............................................................ 30... for their love and support v ACKNOWLEDGMENTS During these four years at Texas A&M University I have tried my best to adhere to the requirements of being a qualified...

  17. University of Maine Researching Floating Technologies for Deepwater

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA group current C3E AmbassadorsUS-EU-Japan-JapanHighlyFrom left to right:First

  18. EA-1792: University of Maine's Deepwater Offshore Floating Wind...

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

    This EA evaluates the environmental impacts of a proposal to support research on floating offshore wind turbine platforms. This project would support the mission, vision, and goals...

  19. University of Maine Researching Floating Technologies for Deepwater...

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

    the commercial development of floating offshore wind technology. The gross U.S. offshore wind potential is more than 4,000 gigawatts (GW) - more than four times the combined...

  20. Ultra-Deepwater Advisory Committee Members | Department of Energy

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

    University of California, Berkeley Dr. Quenton R. Dokken PresidentCEO Gulf of Mexico Foundation Dr. Hartley H. Downs Technology Fellow Baker Hughes Incorporated Dr....

  1. DOE Announces New Research to Advance Safe and Responsible Deepwater

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613PortsmouthBartlesvilleAbout » ContactDepartment of Energy than

  2. Secretaries Chu and Salazar to Convene Meeting on Strengthening Deepwater

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO Overview OCHCO OverviewRepository |

  3. Ultra-Deepwater Advisory Committee | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed off Energy.gov. Are you sureReportsofDepartmentSeries | Department

  4. Ultra-Deepwater and Unconventional Natural Gas and Other Petroleum

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed off Energy.gov. Are you sureReportsofDepartmentSeries | DepartmentResources Program | Department of

  5. Ultra-Deepwater Advisory Committee Members | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO Overview OCHCOSystems Analysis Success|Sustainable EnergyMotor

  6. Neptune Deepwater Port Natural Gas Liquefied Natural Gas Imports (price)

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,12803andYearWithdrawals (MillionYear Jan(Dollars per Thousand

  7. Neptune Deepwater Port Natural Gas Liquefied Natural Gas Imports (price)

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,12803andYearWithdrawals (MillionYear Jan(Dollars per

  8. Neptune Deepwater Port Natural Gas Liquefied Natural Gas Imports (price)

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,12803andYearWithdrawals (MillionYear Jan(Dollars perfrom Yemen

  9. Moray Firth Deepwater Wind Farm Trial | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluatingGroup |JilinLu anMicrogreenMoon Lake Electric Assn Inc (Utah)Mora-SanMoray

  10. EA-1792: University of Maine's Deepwater Offshore Floating Wind Turbine

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the YouTube|6721 Federal Register / Vol. 73, No. 219Does3-E6:Finding of No6:-S1: Finding

  11. Research Portfolio Report Ultra-Deepwater: Subsea Systems Reliability /

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiation Protection Technical s oPrecipitationWeatherTacklingAboutNRAP: MakingSmallSubsea

  12. Research Portfolio Report Ultra-Deepwater: Surface Systems and

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiation Protection Technical s oPrecipitationWeatherTacklingAboutNRAP:

  13. Deepwater Oil & Gas Resources | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015 Business42.1 DEPARTMENTSeptember 27,SeptemberEnergy 4, 2007:JulyofThe

  14. Deepwater Wind Formerly Winergy LLC | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualPropertyd8c-a9ae-f8521cbb8489 No revision hasda62829c05b NoCounty, Nevada | OpenDeepi

  15. Numerical simulations of the Macondo well blowout reveal strong control of oil flow by reservoir permeability and exsolution of gas

    E-Print Network [OSTI]

    Oldenburg, C.M.

    2013-01-01T23:59:59.000Z

    for estimates of the oil and gas flow rate from the Macondoteam and carried out oil and gas flow simulations using theoil-gas system. The flow of oil and gas was simulated using

  16. Electron self-injection into an evolving plasma bubble: Quasi-monoenergetic laser-plasma acceleration in the blowout regimea)

    E-Print Network [OSTI]

    Umstadter, Donald

    for self-injection and production of high-energy elec- trons.13,14, 3 Department of Physics, C1500, The University of Texas at Austin, Austin, Texas 78712, USA injected charge; concomitant phase space rotation reduces the bunch energy spread. In regimes relevant

  17. The why, what, when, where and how of sustainability in civil engineering education

    E-Print Network [OSTI]

    Fenner, R.A.; Cruickshank, H.J.; Ainger, C.

    2014-07-14T23:59:59.000Z

    in the Gulf of Mexico from the Deepwater Horizon platform, or the contribution that the building and operation of energy intensive facilities makes to the accumulation of greenhouse gases in the atmosphere , and global warming. In many parts of the world... building multi-disciplinary teams. Dealing with environmental limits through resource efficiency, pollution control and maintaining ecosystem services. Dealing with people through consultation processes and negotiation to meet society’s and individual...

  18. M thanh ton 4310-55 [FWS-R4-FHC-2013-N108; [FVHC98130406900-XXX-FF04G01000

    E-Print Network [OSTI]

    lng cha tng có du và thi khác t các giàn khoan và t u ging khoan trên áy bin. Deepwater Horizon tràn tràn. Mt s lng cha xác nh khí t nhiên cng c phát hành cho môi trng nh là kt qu ca v tràn du. Ngi c y gian c bn (cht lng và iu kin có th tn ti nu s c tràn du ã không xy ra tài nguyên) hoàn tt. Cn c các

  19. Iteratively extending time horizon reinforcement learning

    E-Print Network [OSTI]

    Wehenkel, Louis

    - Belgium y Research Fellow FNRS, #3; Postdoctoral Researcher FNRS Abstract. Reinforcement learning aims

  20. Horizon 2020 Health/biotech opportunities

    E-Print Network [OSTI]

    Schettini, Raimondo

    research & the bioeconomy Secure, clean and efficient energy Smart, green and integrated transport and the bioeconomy: Secure, clean and efficient energy Smart, green and integrated transport Climate action