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Sample records for deepwater horizon blowout

  1. 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

    2012-01-01

    Abbreviations DH: Deepwater Horizon drilling platform; AHR:blowout of the Deepwater Horizon (DH) drilling platform wasexplosion of the Deepwater Hori- zon oil drilling platform

  2. Deepwater Horizon Study Group 3 Environmental Report January 2011

    E-Print Network [OSTI]

    Silver, Whendee

    assessment of the Deepwater Horizon oil spill, as well as summarize the lessons learned from the spillDeepwater Horizon Study Group 3 Environmental Report ­ January 2011 1 The Macondo Blowout. #12;Deepwater Horizon Study Group The Macondo Blowout Environmental Report 2 1 Looking Back

  3. Deepwater Horizon Natural Resource Damage Assessment Deepwater Horizon Trustees Announce Agreement in Principle for

    E-Print Network [OSTI]

    ) ------- The Deepwater Horizon oil spill Natural Resource Damage Assessment Trustees (Trustees) today announced another Horizon oil spill Natural Resource Damage Assessment and restoration will continue until the publicDeepwater Horizon Natural Resource Damage Assessment Deepwater Horizon Trustees Announce Agreement

  4. Deepwater Horizon Situation Report #5

    SciTech Connect (OSTI)

    2010-06-10

    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/

  5. The Path to Disaster The Deepwater Horizon

    E-Print Network [OSTI]

    Pym, David J.

    was not disconnected · The escaping gas ignited · 11 dead · The drilling rig Deepwater Horizon sank after 2 days #1221/08/2013 1 The Path to Disaster The Deepwater Horizon BP's disaster in the Gulf of Mexico Industrial Psychology Research Centre 14th August, 2013 Transocean Deepwater Horizon #12;21/08/2013 2

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

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

    Horizon response, identifies approaches for radiological or nuclear emergency planning The 2010 Deepwater Horizon oil spill shares many of the same challenges associated...

  7. 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.

  8. DOI Strategic Sciences Working Group Mississippi Canyon 252/Deepwater Horizon Oil Spill

    E-Print Network [OSTI]

    DOI Strategic Sciences Working Group Mississippi Canyon 252/Deepwater Horizon Oil Spill Strategic Sciences Working Group Mississippi Canyon 252/Deepwater Horizon Oil Spill Progress Report Executive Summary Introduction and Objectives The Mississippi Canyon 252/Deepwater Horizon (MS252) oil spill

  9. 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 the chromatographic signatures of petroleum biomarkers in Deepwater Horizon (DH) source oil, three other reference

  10. 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

  11. 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 ...

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

    E-Print Network [OSTI]

    Meyers, Steven D.

    explosion occurred on the Deepwater Horizon (DWH) oil drilling platform in the northeastern Gulf of Mexico#12;Did the northeastern Gulf of Mexico become greener after the Deepwater Horizon oil spill ecosystem in the northeastern Gulf of Mexico (NEGOM) from the Deepwater Horizon oil spill (April ­ July 2010

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

    E-Print Network [OSTI]

    Whitehead, Andrew

    -seq | toxicogenomics Following the Deepwater Horizon (DWH) drilling disaster on April 20, 2011, in the Gulf of MexicoGenomic 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

  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

    2013-01-01

    occurred on the Deepwater Horizon drilling rig, which wasBP Deepwater Horizon Oil Spill and O? shore Drilling, 2010]BP Deepwater Horizon Oil Spill and O?shore Drilling (2010).

  15. 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.

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

    E-Print Network [OSTI]

    Taghizadeh Ansari, Matin

    2014-12-15

    to proper handling of the PVT properties of the wellbore and annular fluids. To account for wellbore transient behavior during the Worst Case Discharge (WCD) blowout scenario, a transient multiphase flow model needs to be coupled with a robust transient...

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

    E-Print Network [OSTI]

    Grosell, Martin

    Deepwater Horizon crude oil impacts the developing hearts of large predatory pelagic fish John P November 6, 2013) The Deepwater Horizon disaster released more than 636 million L of crude oil and larvae) of tunas, swordfish, and other large predators were potentially exposed to crude oil

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

    E-Print Network [OSTI]

    OFFICE OF RESPONSE AND RESTORATION ! EMERGENCY RESPONSE DIVISION Deepwater Horizon Oil: Characteristics and Concerns Oil spilled from the Deepwater Horizon wellhead has been accumulating in the environment of the Gulf of Mexico since April 20. This document describes the potential forms the oil may take

  19. 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 of the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling for the use of members responders assertions. 2 DEEPWATER HORIZON MC252 GULF INCIDENT OIL BUDGET [hereinafter OIL BUDGET] (Aug. 4

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

    SciTech Connect (OSTI)

    Onishi, Yasuo

    2010-06-01

    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.

  1. From hurricanes to the Deepwater Horizon oil spill in coastal Louisiana: The impact of regulatory change

    E-Print Network [OSTI]

    Cheong, So-Min

    2014-01-01

    The issue of whether adaptations to past disasters can impede adaptation to new disasters of a different type or intensity will be analyzed by examining the transition from frequent hurricanes to the Deepwater Horizon oil spill in coastal Louisiana...

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

    E-Print Network [OSTI]

    Grosell, Martin

    Study: Exposure to crude oil from the Deepwater Horizon disaster causes swimming deficiencies of large fish Crude oil spreads across a wide swath of the Gulf of Mexico during the 2010 Deepwater Horizon. The four million barrels of crude oil that spewed into the Gulf of Mexico from BP's failed oil drilling

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

    SciTech Connect (OSTI)

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

    2011-06-15

    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.

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

    E-Print Network [OSTI]

    Grosell, Martin

    Deepwater Horizon Study Finds Crude Oil Harmful to Bluefin, Yellowfin Tuna This photo from April 24 sponsored by the National Oceanic and Atmospheric Administration, found that crude oil from the 2010 for 87 days, during which time it discharged nearly 5 million barrels of crude oil. Since the spill

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

    E-Print Network [OSTI]

    Boynton, Walter R.

    , as the rig's crew completed drilling the exploratory Macondo well deep under the waters of the Gulf of Mexico AND OFFSHORE DRILLING AND TERRY D. GARCIA NATIONAL COMMISSION ON THE BP DEEPWATER HORIZON OIL SPILL AND OFFSHORE DRILLING BEFORE THE COMMITTEE ON TRANSPORTATION AND INFRASTRUCTURE SUBCOMMITTEE ON COAST GUARD

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

    E-Print Network [OSTI]

    Dincer, Zeynep

    2013-05-03

    In April 2010, approximately 4.9 million barrels of oil were accidentally released into the Gulf of Mexico during the Deepwater Horizon Macondo Mc252 Oil Spill. Some of the surface oil was carried by prevailing winds and currents and reached...

  7. 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

  8. DeepwaterHorizonOilSpill DraftPhaseIIEarlyRestorationPlan

    E-Print Network [OSTI]

    Authority; Department of Environmental Quality; Department of Wildlife and Fisheries; Department of Natural) is a priceless national treasure. Its natural resources ­ water, fish, beaches, reefs, marshes, oil and gas Review Prepared by the Deepwater Horizon Natural Resource Trustees from State of Alabama (Department

  9. 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

  10. Subsea Application of Dispersant in Deep Oil Spills: Lessons Learned from the 2010 Deepwater

    E-Print Network [OSTI]

    of Hawaii Abstract On 20 April 2010, an explosion occurred on the Deepwater Horizon (DWH) drilling rig in the Gulf of Mexico killing eleven workers. The blowout preventer failed due to buckling of the drill pipe. The spill persisted for 87 days until it finally was contained by pumping cement through two relief wells

  11. Monitoring and Assessing Implications of the Deepwater Horizon Oil Spill: Potential Impacts of the Loop Current on Downstream Marine Ecosystems in the

    E-Print Network [OSTI]

    Monitoring and Assessing Implications of the Deepwater Horizon Oil Spill: Potential Impacts and identifying the areas that can be affected by the oil spill. The assessments performed during this cruise.Lamkin@noaa.gov; 3053614226 1. Executive Summary. As part of NOAA's response to the Deepwater Horizon oil spill

  12. Re: Report has been approved: Effects of Building a Sand Barrier Berm to Mitigate the Effects of the Deepwater Horizon Oil Spill on Louisiana Marshes

    E-Print Network [OSTI]

    a Sand Barrier Berm to Mitigate the Effects of the Deepwater Horizon Oil Spill on Louisiana Marshes of Building a Sand Barrier Berm to Mitigate the Effects of the Deepwater Horizon Oil Spill on LouisianaRe: Report has been approved: Effects of Building a Sand Barrier Berm to Mitigate the Effects

  13. 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.

    better or worse than the others throughout the event with one excep- tion. The lessons learned fromTrajectory Forecast as a Rapid Response to the Deepwater Horizon Oil Spill Yonggang Liu, Robert H. Petersburg, Florida, USA In response to the Gulf of Mexico Deepwater Horizon oil spill, a Lagrangian

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

    E-Print Network [OSTI]

    Grosell, Martin

    Acute Embryonic or Juvenile Exposure to Deepwater Horizon Crude Oil Impairs the Swimming and ecologically important fish species to crude oil during the sensitive early life stages. We show that brief approximately 4 million barrels (6 × 108 L) of crude oil into the northern Gulf of Mexico (GoM).1-3 The DWH

  15. Long-term monitoring data to describe the fate of polycyclic aromatic hydrocarbons in Deepwater Horizon oil submerged off

    E-Print Network [OSTI]

    Clement, Prabhakar

    Clement Environmental Engineering Program, Department of Civil Engineering, Auburn University, AL 36849 The 2010 Deepwater Horizon (DWH) catastrophe had considerable impact on the 50 km long sandy beach sys- tem over the open ocean system in the Gulf of Mexico. Light PAHs, such as naphthalenes, were fully depleted

  16. Fate of Deepwater Horizon oil in Alabama's beach system: Understanding physical evolution processes based on observational data

    E-Print Network [OSTI]

    Clement, Prabhakar

    : Available online 10 December 2014 Keywords: Oil spill Deepwater Horizon spill Beach contamination Polycyclic aromatic hydrocarbons Crude oil spill a b s t r a c t The impact of MC252 oil on northern Gulf of Mexico impacting these beaches was predominantly in the form of water- in-oil (W/O) emulsions, a highly viscous

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

    E-Print Network [OSTI]

    công cng hin nay. Ban Qun Tr ánh Giá Thit Hi Tài Nguyên The Deepwater Horizon xut by d án v gii trí ti/hoc tng cng s dng và/hoc thng ngon ca công chúng i vi các ngun li thiên nhiên này. xut Nâng Cp Các Công

  18. 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.

    2011-06-15

    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.

  19. 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

    2013-01-01

    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

  20. nh gi Tn tht Ti nguyn Thin nhin Trn du Deepwater Horizon D n phc hi C bin ti B Bin Quc Gia

    E-Print Network [OSTI]

    Horizon. Sau s c tràn du Deepwater Horizon, mt lng áng k du t n băi bin dc theo Florida Panhandle. Trong vi C rùa( Thallasiumtestudium ) , loài ph bin nht ti thm c bin GUIS 3 ) t các im quan trc o lng và

  1. 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

  2. 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

  3. Bivariate Left-Censored Bayesian Model for Predicting Exposure: Preliminary Analysis of Worker Exposure during the Deepwater Horizon Oil Spill

    E-Print Network [OSTI]

    Groth, Caroline; Banerjee, Sudipto

    2015-01-01

    M. , Reddy, K. (2014) Crude oil spill exposure and humanof the volatile components of crude oil that make upapproximately 20% of the crude oil released in the Deepwater

  4. 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

    2011-01-01

    .pdf.txt Content-Type text/plain; charset=windows-1252 Winter 2011 tx H2O 3 or just a drop in thebucket?Texas scientists on the real e?ects of the Deepwater Horizon oil spill 4 tx H2O Winter 2011 Environmental Disaster Continued What if gasoline... used by some oil companies,? Bianchi commented to Texas A&M News & Information Services in November. ??ey use high pressure water systems, which on rocks is ?ne, but not on plant material. So this has likely cut them [the plant material] back so...

  5. 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

    2006-08-16

    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 ...

  6. D e e p w a t e r H o r i z o n O i l S p i l l N a t u r a l R e s o u r c e D a m a g e A s s e s s m e n t Deepwater Horizon Oil Spill

    E-Print Network [OSTI]

    ) was using Transocean's mobile offshore drilling unit Deepwater Horizon to drill a well in the Macondo prospect (Mississippi Canyon 252 ­ MC252) when the well blew out, and the drilling unit exploded, caught

  7. Deepwater Horizon Disaster Professor Satish Nagarajaiah

    E-Print Network [OSTI]

    Nagarajaiah, Satish

    and Women Who Serve Our Country And To Those Who Lost Their Lives Doing Their Duty Invited Lecture, ASCE of natural gas. Was upended by Hurricane Rita in 2005, but no leak!! and things worked fine. The platform/day and 220 million CFT of natural gas. Badly damaged in Hurricane Katrina 2005. No leak!! and things worked

  8. Data from Deepwater Horizon | 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 Data Center Home Page on Delicious Rank EERE:FinancingPetroleum Based| Department8, 20153Daniel Boff About Us DanielData Safer than Ever

  9. PHYSICAL PARAMETERS OF STANDARD AND BLOWOUT JETS

    SciTech Connect (OSTI)

    Pucci, Stefano; Romoli, Marco; Poletto, Giannina; Sterling, Alphonse C.

    2013-10-10

    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.

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

    DOE Patents [OSTI]

    Lieuwen, Tim C.; Nair, Suraj

    2006-08-15

    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.

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

    E-Print Network [OSTI]

    Many Task Computing for Modeling the Fate of Oil Discharged from the Deep Water Horizon Well@jhu.edu Abstract--The Deep Water Horizon well blowout on April 20th 2010 discharged between 40,000 - 1.2 million@med.miami.edu O. M. Knio Dept of Mechanical Engineering Johns Hopkins University Baltimore, MD knio

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

    E-Print Network [OSTI]

    Benson, Sally M.

    2010-01-01

    fluid volume. Well construction includes drilling, reworkingTrends Table 3: Drilling Blowouts, Wells Drilled, Rates and1,11 As for well construction overall, the drilling blowout

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

    E-Print Network [OSTI]

    Benson, Sally M.

    2010-01-01

    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

  14. 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 In April of 2010, the explosion of the Deepwater Hori- zon oil drilling platform initiated the largest deepRESEARCH ARTICLE Open Access RNA-Seq reveals complex genetic response to deepwater horizon oil

  15. 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.

    2010-09-01

    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.

  16. Development and assessment of electronic manual for well control and blowout containment 

    E-Print Network [OSTI]

    Grottheim, Odd Eirik

    2005-11-01

    DEA ?? 63, Floating Vessel Blowout Control is a blowout containment study which was completed in 1990, and it did not include discussions about operations in the water depths we currently operate in. As offshore drilling is continuously moving...

  17. 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

  18. Rock mechanics aspects of blowout self-containment 

    E-Print Network [OSTI]

    Akbarnejad Nesheli, Babak

    2009-06-02

    pressure is high, bridging can be a very effective method for blowout containment. In this method, the formation caves into the open hole or onto the casing and stops the flow of the formation's fluid, either naturally or intentionally. This method can...

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

    E-Print Network [OSTI]

    Koutsolelos, Evangelos

    2012-01-01

    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 ...

  20. Interlaboratory Analytical Comparison Study to Support Deepwater Horizon

    E-Print Network [OSTI]

    R. Kucklick Analytical Chemistry Division Material Measurement Laboratory National Institute tissue QA10TIS01 reported here. In this exercise, selected polycyclic aromatic hydrocarbons (PAHs have collected environmental samples for hydrocarbon analysis and submitted them to different

  1. Interlaboratory Analytical Comparison Study to Support Deepwater Horizon

    E-Print Network [OSTI]

    . Kucklick Analytical Chemistry Division Material Measurement Laboratory National Institute of Standards, crude oil QA10OIL01 reported here. In this exercise, selected polycyclic aromatic hydrocarbons (PAHs will be required. In addition, numerous other entities have collected environmental samples for hydrocarbon

  2. Interlaboratory Analytical Comparison Study to Support Deepwater Horizon

    E-Print Network [OSTI]

    and John R. Kucklick Analytical Chemistry Division Material Measurement Laboratory National Institute, marine sediment QA10SED01 reported here. In this exercise, selected polycyclic aromatic hydrocarbons for hydrocarbon analysis and submitted them to different laboratories throughout the country. In the past

  3. 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shinesSolarNewsusceptometer underI REEECNO OFChicago No-Noticel l i a m H a l e y

  4. 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesseworkSURVEY UNIVERSEHow ORISE isParis CornwellDuring EmergenciesWeband

  5. A NUMERICAL MODEL OF STANDARD TO BLOWOUT JETS

    SciTech Connect (OSTI)

    Archontis, V.; Hood, A. W.

    2013-06-01

    We report on three-dimensional (3D) MHD simulations of the formation of jets produced during the emergence and eruption of solar magnetic fields. The interaction between an emerging and an ambient magnetic field in the solar atmosphere leads to (external) reconnection and the formation of ''standard'' jets with an inverse Y-shaped configuration. Eventually, low-atmosphere (internal) reconnection of sheared fieldlines in the emerging flux region produces an erupting magnetic flux rope and a reconnection jet underneath it. The erupting plasma blows out the ambient field and, moreover, it unwinds as it is ejected into the outer solar atmosphere. The fast emission of the cool material that erupts together with the hot outflows due to external/internal reconnection form a wider ''blowout'' jet. We show the transition from ''standard'' to ''blowout'' jets and report on their 3D structure. The physical plasma properties of the jets are consistent with observational studies.

  6. HORIZON SENSING

    SciTech Connect (OSTI)

    Larry G. Stolarczyk

    2003-03-18

    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.

  7. Coherence resonance near blowout bifurcation in nonlinear dynamical systems

    E-Print Network [OSTI]

    Bambi Hu; Changsong Zhou

    2000-05-29

    Previous studies have shown that noise can induce coherence resonance in some nonlinear dynamical systems close to a bifurcation of a periodic motion, such as in excitable systems. We demonstrate that coherence resonance can be observed in systems close to a {\\sl blowout bifurcation}. It is shown that for dynamical systems with an invariant subspace in which there is a phase-coherent chaotic attractor, the interplay among the oscillation of local transverse stability, noise and nonlinearity can lead to coherence resonance phenomenon. The mechanism of coherence resonance in this type of system is different from that in previously studied systems.

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

    Energy Savers [EERE]

    DOE Announces New Research to Advance Safe and Responsible Deepwater Drilling Technologies DOE Announces New Research to Advance Safe and Responsible Deepwater Drilling...

  9. University of Maine Researching Floating Technologies for Deepwater...

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

    Maine Researching Floating Technologies for Deepwater Offshore Wind University of Maine Researching Floating Technologies for Deepwater Offshore Wind October 1, 2012 - 12:57pm...

  10. EA-1792: University of Maine's Deepwater Offshore Floating Wind...

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

    792: University of Maine's Deepwater Offshore Floating Wind Turbine Testing and Demonstration Project, Gulf of Maine EA-1792: University of Maine's Deepwater Offshore Floating Wind...

  11. Ultra-Deepwater Production Systems

    SciTech Connect (OSTI)

    Ken L. Smith; Marc E. Leveque

    2005-05-31

    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.

  12. Introduction Fresh or brackish ground water in submarine environ-

    E-Print Network [OSTI]

    Krantz, David

    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

  13. Ultra-Deepwater Production Systems

    SciTech Connect (OSTI)

    K. L. Smith; M. E. Leveque

    2003-09-30

    This report includes technical progress made during the period October, 2002 through September, 2003. At the end of the second technical progress report, the ConocoPhillips opportunities to apply subsea processing in the Gulf of Mexico had been exhausted, and an alternative site was identified in Norway. This was a non-ConocoPhillips operated field, and the subsea processing was proposed as a phased development approach with 2-phase separation at the field, and then gas and liquids exported via pipeline to remote platform locations for processing. Although the unrisked economics were quite favorable, the risked economic evaluation compelled the operator to develop the field with the more conventional and proven Floating Production, Storage and Offloading (FPSO) option. Work on the subsea processing was suspended at this time. Discussions with DOE regarding two other step-change deepwater technologies ensued. One was an effort to develop a light-weight, high pressure composite production riser. A field demonstration of the design would then be performed by deploying a limited number of composite joints in a Gulf of Mexico deepwater development. The other was to begin the process of taking drilling with casing technology to the deepwater. This is called, ''close-tolerance liner drilling''. It was agreed that both technologies should be pursued, and the work began. During this reporting period, the initial production riser design had been completed and preliminary test sample components were being fabricated. Regarding the liner drilling, the sub-contractors were selected, the design basis was agreed and designs progressed towards meeting a projected first quarter, 2004 onshore test program.

  14. Windflow circulation patterns in a blowout in coastal dunes along the southern shore of Lake Michigan

    SciTech Connect (OSTI)

    Bauch, N.J.; Bennett, S.; Ferguson, V.; Fraser, G.S.; Gellasch, C.A.; Millard, C.L.; Mueller, B.; O'Malley, P.J.; Way, J.N.; Woodfield, M.C. (Indiana Univ., Bloomington, IN (United States). Dept. of Geosciences)

    1993-03-01

    The windflow patterns in one of several large active blowouts in the coastal dunes along the southern shore of Lake Michigan was intensively monitored over a two-day period. Two wind towers, consisting of four sets of anemometer cups mounted at 20-, 40-, 80, and 160-cm heights above the base, were used to provide a velocity profile from which basal shear velocities could be calculated. A wind vane was mounted at the top of the tower to monitor wind directions. Data was collected continuously with digital data loggers and averaged over 1-min intervals, and each station was occupied for a 5-min period. The topography of the blowout was mapped with a transit, which also was used to establish the position and elevation of the authors data-collecting stations. Photomosaics were used to prepare a map of the geomorphic elements. The elliptical blowout is 100m long and approximately 25m wide. Its floor drops slightly in elevation from the mouth, and then rises to a height of 32 meters at the back wall. The walls of the blowout assume smooth parabolic shapes except where undercutting at the margins has produced several large slump blocks. Windflow entering the blowout at the mouth and sides separates at the point of maximum expansion and veers as much as 100[degree]. Maximum velocities occur at the point of reattachment, and deceleration occurs as the wind proceeds into the blowout. Axial flows may accelerate toward the back wall where flow compression occurs. Flows entering the blowout at the back wall separate at the margin. As they overflow the blowout, they produce a reverse flow circulation that is strongest near the mouth and decelerates rapidly up the axis.

  15. Physical observability of horizons

    E-Print Network [OSTI]

    Matt Visser

    2014-11-25

    Event horizons are (generically) not physically observable. In contrast, apparent horizons (and the closely related trapping horizons) are generically physically observable --- in the sense that they can be detected by observers working in finite-size regions of spacetime. Consequently event horizons are inappropriate tools for defining astrophysical black holes, or indeed for defining any notion of evolving}black hole, (evolving either due to accretion or Hawking radiation). The only situation in which an event horizon becomes physically observable is for the very highly idealized stationary or static black holes, when the event horizon is a Killing horizon which is degenerate with the apparent and trapping horizons; and then it is the physical observability of the apparent/trapping horizons that is fundamental --- the event horizon merely comes along for the ride.

  16. Physical observability of horizons

    E-Print Network [OSTI]

    Visser, Matt

    2014-01-01

    Event horizons are (generically) not physically observable. In contrast, apparent horizons (and the closely related trapping horizons) are generically physically observable --- in the sense that they can be detected by observers working in finite-size regions of spacetime. Consequently event horizons are inappropriate tools for defining astrophysical black holes, or indeed for defining any notion of evolving}black hole, (evolving either due to accretion or Hawking radiation). The only situation in which an event horizon becomes physically observable is for the very highly idealized stationary or static black holes, when the event horizon is a Killing horizon which is degenerate with the apparent and trapping horizons; and then it is the physical observability of the apparent/trapping horizons that is fundamental --- the event horizon merely comes along for the ride.

  17. 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 of Mexico covered a sufficiently large area to be observed by the European Space Agency Advanced on the ocean surface is beneficial for estimating the amount of oil as a function of time and its impact

  18. Ultra-Deepwater Production Systems

    SciTech Connect (OSTI)

    K. L. Smith; M. E. Leveque

    2004-09-30

    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.

  19. Limitations of extended reach drilling in deepwater 

    E-Print Network [OSTI]

    Akinfenwa, Akinwunmi Adebayo

    2000-01-01

    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...

  20. Deepwater Offshore Wind Technology Research Requirements (Poster)

    SciTech Connect (OSTI)

    Musial, W.

    2005-05-01

    A poster presentation for AWEA's WindPower 2005 conference in Denver, Colorado, May 15-18, 2005 that provides an outline of the requirements for deepwater offshore wind technology development

  1. 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)

    1996-08-01

    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.

  2. Coiled-tubing applications for blowout-control operations

    SciTech Connect (OSTI)

    Adams, N.J.; Mack, S.K.; Fannin, V.R.; Rocchi, T.

    1996-05-01

    Coiled-tubing drilling is now being used in various operations. Its complete field of applications is not currently established. Coiled tubing used for well control while drilling is a new field where its limits are being explored. This paper provides guidelines on topics to be considered in determining the applicability of coiled tubing for well-control problems. The information provided is based on recent field experiences with several well-control problems when drilling vent and relief wells. In some cases, coiled-tubing drilling capabilities, by necessity, were significantly extended beyond levels the industry considered to be upper limits. Well control cannot always be handled by coiled tubing. It is a special-application tool that can handle many situations and is, in some cases, clearly the optimum choice for the application. This paper presents guidelines for selecting coiled tubing for each application and discusses economics. It also describes coiled-tubing operations for regaining control of blowout wells in certain situations and gives technical requirements for planning and executing these types of jobs. Case histories where coiled-tubing units (CTU`s) have been used to regain control of drilling and producing wells are provided for illustration.

  3. HELICAL BLOWOUT JETS IN THE SUN: UNTWISTING AND PROPAGATION OF WAVES

    SciTech Connect (OSTI)

    Lee, E. J.; Archontis, V.; Hood, A. W.

    2015-01-01

    We report on a numerical experiment of the recurrent onset of helical ''blowout'' jets in an emerging flux region. We find that these jets are running with velocities of ?100-250 km s{sup –1} and they transfer a vast amount of heavy plasma into the outer solar atmosphere. During their emission, they undergo an untwisting motion as a result of reconnection between the twisted emerging and the non-twisted pre-existing magnetic field in the solar atmosphere. For the first time in the context of blowout jets, we provide direct evidence that their untwisting motion is associated with the propagation of torsional Alfvén waves in the corona.

  4. Pressure in a deep-water Stokes wave David Henry

    E-Print Network [OSTI]

    Pressure in a deep-water Stokes wave David Henry School of Mathematical Sciences Dublin City description of the pressure distribution function for a deep-water Stokes wave. Keywords: Stokes wave, deep provide a qualitative description of the pressure distribution beneath the free surface of a deep-water

  5. Sedimentation pulse in the NE Gulf of Mexico following the 2010 DWH blowout

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

    Brooks, Gregg R.; Larson, Rebekka A.; Schwing, Patrick T.; Romero, Isabel; Moore, Christopher; Reichart, Gert -Jan; Jilbert, Tom; Chanton, Jeff P.; Hastings, David W.; Overholt, Will A.; et al

    2015-07-14

    The objective of this study was to investigate the impacts of the Deepwater Horizon (DWH) oil discharge at the seafloor as recorded in bottom sediments of the DeSoto Canyon region in the northeastern Gulf of Mexico. Through a close coupling of sedimentological, geochemical, and biological approaches, multiple independent lines of evidence from 11 sites sampled in November/December 2010 revealed that the upper ~1 cm depth interval is distinct from underlying sediments and results indicate that particles originated at the sea surface. Consistent dissimilarities in grain size over the surficial ~1 cm of sediments correspond to excess 234Th depths, which indicatesmore »a lack of vertical mixing (bioturbation), suggesting the entire layer was deposited within a 4–5 month period. In addition, a time series from four deep-sea sites sampled up to three additional times over the following two years revealed that excess 234Th depths, accumulation rates, and 234Th inventories decreased rapidly, within a few to several months after initial coring. The interpretation of a rapid sedimentation pulse is corroborated by stratification in solid phase Mn, which is linked to diagenesis and redox change, and the dramatic decrease in benthic formanifera density that was recorded in surficial sediments. Results are consistent with a brief depositional pulse that was also reported in previous studies of sediments, and marine snow formation in surface waters closer to the wellhead during the summer and fall of 2010. Although sediment input from the Mississippi River and advective transport may influence sedimentation on the seafloor in the DeSoto Canyon region, we conclude based on multidisciplinary evidence that the sedimentation pulse in late 2010 is the product of marine snow formation and is likely linked to the DWH discharge.« less

  6. Sedimentation pulse in the NE Gulf of Mexico following the 2010 DWH blowout

    SciTech Connect (OSTI)

    Brooks, Gregg R.; Larson, Rebekka A.; Schwing, Patrick T.; Romero, Isabel; Moore, Christopher; Reichart, Gert -Jan; Jilbert, Tom; Chanton, Jeff P.; Hastings, David W.; Overholt, Will A.; Marks, Kala P.; Kostka, Joel E.; Holmes, Charles W.; Hollander, David; Chin, Wei -Chun

    2015-07-14

    The objective of this study was to investigate the impacts of the Deepwater Horizon (DWH) oil discharge at the seafloor as recorded in bottom sediments of the DeSoto Canyon region in the northeastern Gulf of Mexico. Through a close coupling of sedimentological, geochemical, and biological approaches, multiple independent lines of evidence from 11 sites sampled in November/December 2010 revealed that the upper ~1 cm depth interval is distinct from underlying sediments and results indicate that particles originated at the sea surface. Consistent dissimilarities in grain size over the surficial ~1 cm of sediments correspond to excess 234Th depths, which indicates a lack of vertical mixing (bioturbation), suggesting the entire layer was deposited within a 4–5 month period. In addition, a time series from four deep-sea sites sampled up to three additional times over the following two years revealed that excess 234Th depths, accumulation rates, and 234Th inventories decreased rapidly, within a few to several months after initial coring. The interpretation of a rapid sedimentation pulse is corroborated by stratification in solid phase Mn, which is linked to diagenesis and redox change, and the dramatic decrease in benthic formanifera density that was recorded in surficial sediments. Results are consistent with a brief depositional pulse that was also reported in previous studies of sediments, and marine snow formation in surface waters closer to the wellhead during the summer and fall of 2010. Although sediment input from the Mississippi River and advective transport may influence sedimentation on the seafloor in the DeSoto Canyon region, we conclude based on multidisciplinary evidence that the sedimentation pulse in late 2010 is the product of marine snow formation and is likely linked to the DWH discharge.

  7. September 22, 1998, Plaquemines Parish, Louisiana--The blowout of a

    E-Print Network [OSTI]

    September 22, 1998, Plaquemines Parish, Louisiana--The blowout of a well owned by Equinox Oil. Settlement A settlement of $1.2 million was reached in September 2006. :::NATURALRESOURCEDAMAGEASSESSMENT:::Equinox--Louisiana::: NATURAL RESOURCE DAMAGE ASSESSMENT CasE FiLE: Equinox--Louisiana Restoration Restoration has not yet been

  8. Horizon 2020 JEUPISTE Seminar

    E-Print Network [OSTI]

    Banbara, Mutsunori

    2020 Horizon 2020 FP7 "Critical Raw Materials Innovation Network" /Date: 2014 5 29 13301930 1300 and Nanotechnology Development Division, Research Promotion Bureau, MEXT 15:50 Horizon2020 Critical Raw Materials Innovation Network Lecture by Dr Catherine Joce, Project Manager of Critical Raw Materials Innovation

  9. Three-Dimensional Simulations of Deep-Water Breaking Waves

    E-Print Network [OSTI]

    Brucker, Kyle A; Dommermuth, Douglas G; Adams, Paul

    2014-01-01

    The formulation of a canonical deep-water breaking wave problem is introduced, and the results of a set of three-dimensional numerical simulations for deep-water breaking waves are presented. In this paper fully nonlinear progressive waves are generated by applying a normal stress to the free surface. Precise control of the forcing allows for a systematic study of four types of deep-water breaking waves, characterized herein as weak plunging, plunging, strong plunging, and very strong plunging.

  10. FE's Ultra-Deepwater Program focuses on spill prevention, safety...

    Office of Environmental Management (EM)

    mission is to work toward mitigating the risks and challenges associated with ultra-deepwater drilling and production operations. This includes deepening the collaboration...

  11. Subsea valve actuator for ultra deepwater

    SciTech Connect (OSTI)

    Ali, S.Z.; Skeels, H.B.; Montemayor, B.K.; Williams, M.R.

    1996-12-31

    This paper reviews the continuing development of gate valve and actuator technology for subsea completions extending into ultra deep water. The basic technical challenges inherent to subsea valve actuators are reviewed, along with the various factors which affect the design and performance of these devices in deepwater applications. The high external ambient pressures which occur in deep water, coupled with high specific gravity hydraulic control fluids, are shown to have a significant impact on the performance of the actuators. This paper presents design and analysis methods and the verification test procedures which are required to develop and qualify new deep water actuator designs. Gate valve actuators of the type described in this paper are currently in use on subsea christmas trees on the world`s deepest subsea wells offshore Brazil (water depths >3,000 feet). New applications of the deepwater actuators are in process for upcoming Gulf of Mexico subsea production systems in water depths approaching 6,000 feet. The actuator/valve development method described in this paper has been confirmed by performance verification testing of full scale valves and actuators using a hyperbaric chamber to simulate ultra deepwater operating conditions. Performance of the test valves and actuators correlated very well with analytical predictions. Test results have confirmed that the new valve actuator designs will satisfy API 17D performance requirements for water depths up to 7,500 feet, well in excess of the upcoming GOM application.

  12. Static M-horizons

    E-Print Network [OSTI]

    J. Gutowski; G. Papadopoulos

    2011-07-11

    We determine the geometry of all static black hole horizons of M-theory preserving at least one supersymmetry. We demonstrate that all such horizons are either warped products R^{1,1} *_w S or AdS_2 *_w S, where S admits an appropriate Spin(7) or SU(4) structure respectively; and we derive the conditions imposed by supersymmetry on these structures. We show that for electric static horizons with Spin(7) structure, the near horizon geometry is a product R^{1,1} * S, where S is a compact Spin(7) holonomy manifold. For electric static solutions with SU(4) structure, we show that the horizon section S is a circle fibration over an 8-dimensional Kahler manifold which satisfies an additional condition involving the Ricci scalar and the length of the Ricci tensor. Solutions include AdS_2 * S^3 * CY_6 as well as many others constructed from taking the 8-dimensional Kahler manifold to be a product of Kahler-Einstein and Calabi-Yau spaces.

  13. A small-scale eruption leading to a blowout macrospicule jet in an on-disk coronal hole

    SciTech Connect (OSTI)

    Adams, Mitzi; Sterling, Alphonse C.; Moore, Ronald L.; Gary, G. Allen E-mail: alphonse.sterling@nasa.gov E-mail: gag0002@uah.edu

    2014-03-01

    We examine the three-dimensional magnetic structure and dynamics of a solar EUV-macrospicule jet that occurred on 2011 February 27 in an on-disk coronal hole. The observations are from the Solar Dynamics Observatory (SDO) Atmospheric Imaging Assembly (AIA) and the SDO Helioseismic and Magnetic Imager (HMI). The observations reveal that in this event, closed-field-carrying cool absorbing plasma, as in an erupting mini-filament, erupted and opened, forming a blowout jet. Contrary to some jet models, there was no substantial recently emerged, closed, bipolar-magnetic field in the base of the jet. Instead, over several hours, flux convergence and cancellation at the polarity inversion line inside an evolved arcade in the base apparently destabilized the entire arcade, including its cool-plasma-carrying core field, to undergo a blowout eruption in the manner of many standard-sized, arcade-blowout eruptions that produce a flare and coronal mass ejection. Internal reconnection made bright 'flare' loops over the polarity inversion line inside the blowing-out arcade field, and external reconnection of the blowing-out arcade field with an ambient open field made longer and dimmer EUV loops on the outside of the blowing-out arcade. That the loops made by the external reconnection were much larger than the loops made by the internal reconnection makes this event a new variety of blowout jet, a variety not recognized in previous observations and models of blowout jets.

  14. 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

    by BP Photo provided by BP NASA Terra image #12;What are Causes of Ocean Oil Spills? * Oil drilling rig of Mexico Spill Ongoing BP Deepwater Horizon ­ Gulf of Mexico ­ estimates of 12,000-24,000 bbls/day or 430,000 -930,000 bbls as of May 28, 2010 #12;Santa Barbara Channel - 1969 Drilling rig blowout ­ Union Oils

  15. 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-Inspired SolarAboutXu Named| Princeton PlasmaZhihongOn-SitecourseDeepwater

  16. 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.

    2011-01-01

    a morato- rium on deepwater drilling after finding that "Categorical Exclusions for Deepwater Drilling in the Gulf ofReview Process for Deepwater Drilling in the Gulf is

  17. 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))

    1996-01-01

    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.

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

    E-Print Network [OSTI]

    Mason, O.U.

    2012-01-01

    that exhibited propane and ethane anomalies (Valentine etpreferential loss of both ethane and propane relative toa regression of propane and ethane anomalies against oxygen

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

    E-Print Network [OSTI]

    Lu, Z.

    2012-01-01

    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

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

    E-Print Network [OSTI]

    ) oil is a South Louisiana sweet crude oil (crude oil is termed sweet if it is low in sulfur). Like all crude oils, MS252 oil is a complex mixture of thousands of chemical compounds. Of those thousands in the environment. Compared with other crude oils, MS252 oil is relatively high in alkanes. Because alkanes are made

  1. 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 the country need climate information to make choices about what crops to plant and when to plant them. City energy generation are closely tied to weather and climate trends ­ and therefore new research

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

    E-Print Network [OSTI]

    Mason, O.U.

    2012-01-01

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

  3. nh Gi Thit Hi Ti Nguyn Thin Nhin Trong S C Trn Du Deepwater Horizon

    E-Print Network [OSTI]

    trí c xut này nhm mc ích nâng cao và/hoc tng cng vic s dng và/hoc tn hng nhng tài nguyên thiên nhiên ó ca công chúng. D Án Phát Trin Các C Hi Gii Trí Tng Cng trên Phn Mi Escribano Point ca Khu Vc Qun, loi b mnh vn sau cn băo và sa cha ng sá, bung in thoi công cng ti li ra, phng tin thông tin, c s tŕnh

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

    E-Print Network [OSTI]

    lên các băi bin trng bng phng. Vt liu này cng có th nm thành di nh dài hai dm theo ng mc thy triu và di mc thy triu thuc phía Vnh Fort Pickens, thnh thong khách thm cng hay bi li ch này. Các mnh nh nha

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

    E-Print Network [OSTI]

    Lu, Z.

    2012-01-01

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

  6. Horizontal subsea trees allow frequent deepwater workovers

    SciTech Connect (OSTI)

    Krenek, M.; Hall, G.; Sheng, W.Z.

    1995-05-01

    Horizontal subsea wellheads have found application in the Liuhua oil field in the South China Sea. These trees allow installation and retrieval of downhole equipment through the tree without having to disturb the tree or its external connections to flow lines, service lines, or control umbilicals. This access to the well is important because the Liuhua wells will be produced with electrical submersible pumps (ESPs), which may have relatively short intervals between maintenance, leading to frequent well work. The wells will be completed subsea in about 300 m of water. The large bore, horizontal trees allow all downhole equipment to be pulled without removal of the subsea tree. This wellhead configuration also provides well control and vertical access to downhole equipment through a conventional marine drilling riser and subsea blowout preventer (BOP), eliminating the need for costly specialized completion risers. Another benefit of the horizontal tree is its extremely compact profile with a low number of valves for well control. Valve size and spacing are decoupled from the size and bore spacing of the tubing hanger. The tree`s low profile geometry reduces costs of manufacturing the tree and framework and optimize load transfer to the wellhead.

  7. 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

    2013-01-01

    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...

  8. The Temperature Prediction in Deepwater Drilling of Vertical Well 

    E-Print Network [OSTI]

    Feng, Ming

    2012-07-16

    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...

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

    SciTech Connect (OSTI)

    Jason P. Wilke

    2005-09-30

    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.

  10. Are subsurface safety valves needed in deepwater?

    SciTech Connect (OSTI)

    Verret, A.; Hey, C.

    1995-11-01

    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.

    2008-01-01

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

    Energy Savers [EERE]

    2007 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...

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

    Energy Savers [EERE]

    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. Ion Response to Relativistic Electron Bunches in the Blowout Regime of Laser-Plasma Accelerators

    SciTech Connect (OSTI)

    Popov, K. I.; Rozmus, W.; Naseri, N. [Theoretical Physics Institute, University of Alberta, Edmonton T6G 2J1, Alberta (Canada); Bychenkov, V. Yu. [Theoretical Physics Institute, University of Alberta, Edmonton T6G 2J1, Alberta (Canada); P. N. Lebedev Physics Institute, Russian Academy of Sciences, Moscow 119991 (Russian Federation); Capjack, C. E. [Department of Electrical Computer, Engineering, University of Alberta, Edmonton T6G 2J1, Alberta (Canada); Brantov, A. V. [P. N. Lebedev Physics Institute, Russian Academy of Sciences, Moscow 119991 (Russian Federation)

    2010-11-05

    The ion response to relativistic electron bunches in the so called bubble or blowout regime of a laser-plasma accelerator is discussed. In response to the strong fields of the accelerated electrons the ions form a central filament along the laser axis that can be compressed to densities 2 orders of magnitude higher than the initial particle density. A theory of the filament formation and a model of ion self-compression are proposed. It is also shown that in the case of a sharp rear plasma-vacuum interface the ions can be accelerated by a combination of three basic mechanisms. The long time ion evolution that results from the strong electrostatic fields of an electron bunch provides a unique diagnostic of laser-plasma accelerators.

  15. Remote Camera and Trapping Survey of the Deep-water Shrimps Heterocarpus laevigatus and

    E-Print Network [OSTI]

    Remote Camera and Trapping Survey of the Deep-water Shrimps Heterocarpus laevigatus and H. ensifer and the Geryonid Crab Chaceon granulatus in Palau W. B. SAUNDERS and LEE C. HASTIE Introduction Deep-water bottom pilot efforts di rected at evaluating economic poten tial of deep-water shrimps (King, 1980, 1982, 1984

  16. Research activities in the Norwegian Deepwater Programme Conference on CeSOS Highlights and AMOS Visions

    E-Print Network [OSTI]

    Nørvåg, Kjetil

    Research activities in the Norwegian Deepwater Programme Conference on CeSOS Highlights and AMOS Visions Rolf Baarholm, Statoil 6/5/2013 #12;- Norwegian Deepwater Programme - VIV characterization) in the Norwegian Sea. Later extended to include 16th 17th 18th 19th 20th and 21st round deepwater licences. About

  17. Diversity of deep-water cetaceans in relation to temperature: implications for ocean warming

    E-Print Network [OSTI]

    Myers, Ransom A.

    LETTER Diversity of deep-water cetaceans in relation to temperature: implications for ocean warming anthropogenic change. Here we analyse a large, long-term data set of sightings of deep-water cetaceans from that deep-water oceanic communities that dominate > 60% of the planetƠs surface may reorganize in response

  18. HORIZON SENSING (PROPOSAL No.51)

    SciTech Connect (OSTI)

    Larry G. Stolarczyk, Sc.D.

    2001-10-01

    Project objectives are to demonstrate the feasibility of real-time stress measurement, bit loading, and horizon sensing on a longwall shearer, boring machine, continuous miner, and loading bucket.

  19. 30.-DEEP-WATER OYSTER CULTURE. BP HENRY C. ROWE.

    E-Print Network [OSTI]

    30.-DEEP-WATER OYSTER CULTURE. BP HENRY C. ROWE. It is conceded,I think, that the oyster-growersof Ckmnecticut have taken the lead in the artificial propagation and cultivation of oysters in deep water; by deep water I mean a depth of from 30 to 75 feet. It is but twenty years since the commencement

  20. Transverse instabilities of deep-water solitary waves

    E-Print Network [OSTI]

    Carter, John

    Transverse instabilities of deep-water solitary waves BY BERNARD DECONINCK 1, *, DMITRY E train in deep water is described by a one-dimensional soliton solution of a two- dimensional nonlinear­ capillary waves in deep water that may be two-dimensional, nearly monochro- matic, and are slowly modulated

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

    SciTech Connect (OSTI)

    Not Available

    2011-02-01

    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.

  2. Surface gravities for non-Killing horizons

    E-Print Network [OSTI]

    Cropp, Bethan; Visser, Matt

    2013-01-01

    There are many logically and computationally distinct characterizations of the surface gravity of a horizon, just as there are many logically rather distinct notions of horizon. Fortunately, in standard general relativity, for stationary horizons, most of these characterizations are degenerate. However, in modified gravity, or in analogue spacetimes, horizons may be non-Killing or even non-null, and hence these degeneracies can be lifted. We present a brief overview of the key issues, specifically focusing on horizons in analogue spacetimes and universal horizons in modified gravity.

  3. Jean Paul Bonnet HORIZON 2020

    E-Print Network [OSTI]

    Bordenave, Charles

    Jean Paul Bonnet PCN CNRS HORIZON 2020 Secure, Clean and Efficient Energy THE EU FRAMEWORK,6 billion #12;Secure, Clean and efficient Energy Work Programme 2014-2015 Energy Challenge - main challenges efficiency in industry, decrease energy costs Building a European Research Area in the field of energy

  4. NIF featured on BBC "Horizon"

    SciTech Connect (OSTI)

    Brian Cox

    2010-01-12

    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.

  5. NIF featured on BBC "Horizon"

    ScienceCinema (OSTI)

    Brian Cox

    2010-09-01

    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.

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

    E-Print Network [OSTI]

    Boesch, Donald F.

    2013-01-01

    on the BP Deepwater Horizon Oil Spill and Offshore Drilling.BP Deepwater Horizon Oil Spill and Offshore Drilling (Oil

  7. 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.

    2011-01-01

    Exclusions for Deepwater Drilling in the Gulf of Mexico Aremorato- rium on deepwater drilling after finding that "underMMS Approved 27 Gulf Drilling Operations After BP Disaster,

  8. The impact of subsea boosting on deepwater field development

    SciTech Connect (OSTI)

    Ribeiro, O.J.S.; Camargo, R.M.T.; Paulo, C.A.S.

    1996-12-31

    This paper describes the impact that the use of a subsea boosting system will have on the development of a deepwater field. The analysis covers the technology demands and constraints encountered on screening studies executed for the fields of Marlim, Albacora and Barracuda, as well as an overview of the economic benefits encountered. The paper focuses on the technological demands and constraints identified as well as some considerations about possible alternatives. The demands and constraints identified in the study will provide the industry with some more input to guide the development of the subsea boosting technology, as well as a better understanding of how to apply this new tool on the development of deepwater prospects. The results of the screening study are showing that the subsea boosting systems are a valuable tool to reduce the costs of deepwater developments. The cost cutting possibilities through an integration between the conventional subsea hardware and the subsea boosting systems and the combination of boosting systems are promising alternatives. The encouraging economic results found, as well as the demands and constraints raised in the paper will be of use for those trying to apply these technologies in various areas of the world.

  9. 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

    2004-09-30

    999 Bcf of associated gas were produced from the Gulf of Mexico, with deepwater associated gas production accounting for 20% of this produced gas. Two important issues are the potential environmental impacts and the economic value of deepwater...

  10. Emergent Horizons in the Laboratory

    E-Print Network [OSTI]

    Ralf Schützhold

    2010-04-15

    The concept of a horizon known from general relativity describes the loss of causal connection and can be applied to non-gravitational scenarios such as out-of-equilibrium condensed-matter systems in the laboratory. This analogy facilitates the identification and theoretical study (e.g., regarding the trans-Planckian problem) and possibly the experimental verification of "exotic" effects known from gravity and cosmology, such as Hawking radiation. Furthermore, it yields a unified description and better understanding of non-equilibrium phenomena in condensed matter systems and their universal features. By means of several examples including general fluid flows, expanding Bose-Einstein condensates, and dynamical quantum phase transitions, the concepts of event, particle, and apparent horizons will be discussed together with the resulting quantum effects.

  11. Horizons cannot save the Landscape

    E-Print Network [OSTI]

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

    2012-12-20

    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.

  12. 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.

    2008-05-15

    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.

  13. To appear in International Journal of Spray and Combustion Dynamics as a regular paper Dynamic Data-driven Prediction of Lean Blowout

    E-Print Network [OSTI]

    Ray, Asok

    are partitioned to produce symbol strings that, in turn, generate a special class of probabilistic finite state to thermo-acoustic instabilities and lean blowout (LBO). It is well known that occurrence of LBO could of thermoacoustic instability. To address this issue, the current paper develops an online LBO prediction tool

  14. Can we treat CO? well blowouts like routine plumbing problems? A study of the incidence, impact, and perception of loss of well control

    SciTech Connect (OSTI)

    Porse, Sean L.; Wade, Sarah; Hovorka, Susan D.

    2014-12-31

    Risk communication literature suggests that for a number of reasons, the public may perceive a risk to be greater than indicated by its statistical probability. Public concern over risk can lead to significant and costly delays in project permitting and operations. Considering these theories, media coverage of CO?-related well blowouts in 2013 gave rise to the questions: What is the risk of CO? well blowouts associated with CCUS through CO? EOR? What is the potential public perception of those risks? What information could be used to respond to public concern? To address these questions, this study aims to: 1) provide a framework for understanding the nature of onshore well blowouts, 2) quantify the incidence of such events for three specific geographic regions of Texas, 3) relate this data to CCUS and findings from other studies, and 4) explore the potential implications for public perception of this risk associated with CCUS projects. While quantifying answers to these questions proved to be challenging, the results from this study suggest that (1) the perceived risk of CO? well blowouts may exceed the statistical risk and (2) information that could be used to address this gap could be made more readily available to the greater benefit of industry and stakeholders who support the development of CCUS as an option for addressing anthropogenic CO? emissions. The study also suggests approaches to best conduct such data inquiries.

  15. Can we treat CO? well blowouts like routine plumbing problems? A study of the incidence, impact, and perception of loss of well control

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

    Porse, Sean L.; Wade, Sarah; Hovorka, Susan D.

    2014-12-31

    Risk communication literature suggests that for a number of reasons, the public may perceive a risk to be greater than indicated by its statistical probability. Public concern over risk can lead to significant and costly delays in project permitting and operations. Considering these theories, media coverage of CO?-related well blowouts in 2013 gave rise to the questions: What is the risk of CO? well blowouts associated with CCUS through CO? EOR? What is the potential public perception of those risks? What information could be used to respond to public concern? To address these questions, this study aims to: 1) providemore »a framework for understanding the nature of onshore well blowouts, 2) quantify the incidence of such events for three specific geographic regions of Texas, 3) relate this data to CCUS and findings from other studies, and 4) explore the potential implications for public perception of this risk associated with CCUS projects. While quantifying answers to these questions proved to be challenging, the results from this study suggest that (1) the perceived risk of CO? well blowouts may exceed the statistical risk and (2) information that could be used to address this gap could be made more readily available to the greater benefit of industry and stakeholders who support the development of CCUS as an option for addressing anthropogenic CO? emissions. The study also suggests approaches to best conduct such data inquiries.« less

  16. 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

    2005-09-30

    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.

  17. T emporal structure in the deep-water temperature of four Swiss lakes: A short-term climatic change indicator?

    E-Print Network [OSTI]

    Livingstone, David M.

    7 T emporal structure in the deep-water temperature of four Swiss lakes: A short-term climatic in the hypolimnion. Since in temperate latitudes coupling between deep water and atmosphere is at its strongest in atmospheric forcing on the deep-water temper- ature may well be greater than any seasonal influences. The deep-water

  18. Climatic forcing of eastern Mediterranean deep-water formation and benthic ecosystems during the past 22 000 years

    E-Print Network [OSTI]

    Gilli, Adrian

    Climatic forcing of eastern Mediterranean deep-water formation and benthic ecosystems during) suggest a high spatiotemporal variability of deep-water oxygenation and biogeochemical processes maximum, cool surface waters and high evaporation resulted in maximum convection and oxic deep-waters

  19. Reconstruction of Early Paleogene North Pacific Deep-Water Circulation using the Neodymium Isotopic Composition of Fossil Fish Debris 

    E-Print Network [OSTI]

    Hague, Ashley Melissa

    2012-10-19

    Seamount sites. The Emperor Seamount chain likely played a major role in the flow of the North Pacific deep-water mass as it acted as a physical barrier to flow at deep-water sites compared to shallow depths (albeit still deep-water). ?Nd values indicate...

  20. Contrasting trends in North Atlantic deep-water formation in the Labrador Sea and Nordic Seas during the Holocene

    E-Print Network [OSTI]

    Renssen, Hans

    Contrasting trends in North Atlantic deep-water formation in the Labrador Sea and Nordic Seas deep-water formation is studied in a 9,000-year long simulation with a coupled climate model the experiment, deep-water formation in the Nordic Seas is reduced due to an enhanced influx of sea ice from

  1. The North Pacific Acoustic Laboratory deep-water acoustic propagation experiments in the Philippine Sea

    E-Print Network [OSTI]

    Frandsen, Jannette B.

    The North Pacific Acoustic Laboratory deep-water acoustic propagation experiments in the Philippine in the Philippine Sea during 2009­2011 investigated deep-water acoustic propagation and ambient noise of spanning the water column in the deep ocean. The acoustic transmissions and ambient noise were also

  2. 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

  3. Multicomponent seismic data have unique value for studying near-seafloor geology in deepwater environments.

    E-Print Network [OSTI]

    Texas at Austin, University of

    Multicomponent seismic data have unique value for studying near-seafloor geology in deepwater multicomponent seismic data acquired in deepwater with seafloor sensors show near- seafloor geology wavefields can be separated.Adirect measurement of the downgoing seismic wavelet is thus available

  4. SOLITARY WAVE INTERACTION IN A COMPACT EQUATION FOR DEEP-WATER GRAVITY WAVES

    E-Print Network [OSTI]

    Boyer, Edmond

    SOLITARY WAVE INTERACTION IN A COMPACT EQUATION FOR DEEP-WATER GRAVITY WAVES FRANCESCO FEDELE of the Zakharov equation for unidirectional deep-water waves recently derived by Dyachenko & Zakharov [7-conserving quantities. Key words and phrases. water waves; deep water approximation; Hamiltonian structure; travelling

  5. THE EMERGENCE OF COHERENT WAVE GROUPS IN DEEP-WATER CLAUDIO VIOTTI, DENYS DUTYKH

    E-Print Network [OSTI]

    THE EMERGENCE OF COHERENT WAVE GROUPS IN DEEP-WATER RANDOM SEA CLAUDIO VIOTTI, DENYS DUTYKH , JOHN M. DUDLEY, AND FR´ED´ERIC DIAS Abstract. Extreme surface waves in deep-water long-crested sea-focussing mechanism of surface waves in deep water, furthermore, we narrow our study to the case of two spatial

  6. 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

    2011-01-01

    .pdf.txt Content-Type text/plain; charset=windows-1252 Winter 2011 tx H2O 3 or just a drop in thebucket?Texas scientists on the real e?ects of the Deepwater Horizon oil spill 4 tx H2O Winter 2011 Environmental Disaster Continued What if gasoline... used by some oil companies,? Bianchi commented to Texas A&M News & Information Services in November. ??ey use high pressure water systems, which on rocks is ?ne, but not on plant material. So this has likely cut them [the plant material] back so...

  7. Area products for black hole horizons

    E-Print Network [OSTI]

    Visser, Matt

    2013-01-01

    Area products for multi-horizon black holes often have intriguing properties, and are often independent of the mass of the black hole (depending only on various charges, angular momenta, and moduli). Such products are often formulated in terms of the areas of inner (Cauchy) horizons and event horizons, and often include the effects of unphysical "virtual'" horizons. For the Schwarzschild-de Sitter [Kottler] black hole in (3+1) dimensions it is shown by explicit exact calculation that the product of event horizon area and cosmological horizon area is not mass independent. (Including the effect of the third "virtual" horizon does not improve the situation.) Similarly, in the Reissner-Nordstrom-anti-de Sitter black hole in (3+1) dimensions the product of inner (Cauchy) horizon area and event horizon area is calculated (perturbatively), and is shown to be not mass independent. That is, the mass-independence of the product of physical horizon areas is not generic. In the generic situation, whenever the quasi-local...

  8. Prediction of Barrier-Island Inundation and Overwash: Application to the Gulf of Mexico Deepwater Horizon Oil Spill

    E-Print Network [OSTI]

    and occasional overwash. Vegetated at landward extent. Back-bay marsh: Protected from waves by dunes and waves. Sand flats: Inundated daily by tides and waves. Beach and dunes: Shaped by wind, swash visit: http://coastal.er.usgs.gov/hurricanes/deepwaterhorizon/ U.S. Department of the Interior May 2010

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

    E-Print Network [OSTI]

    Sinh Vnh St. Joseph thuc Qun Gulf, và có th thêm c khu Bo Tn Thy Sinh Cng Alligator thuc Qun Franklin hi ti ba Khu Bo Tn Thy Sinh (Vnh St. Joseph, Cng Alligator, và St. Andrews). Bc tip theo s bao gm vic bin báo mang tính giáo dc và cp các t ri ti các li h tàu ti Vnh St. Joseph, Cng Alligator, and Vnh St

  10. New subsea wiper plugs hold down deepwater cementing costs

    SciTech Connect (OSTI)

    Stringer, R.; Sonnefeld, A.; Minge, J.

    1997-02-01

    British Petroleum Exploration (BPX) achieved top-quality cementing performance at significantly lower costs in a deepwater area 45 miles offshore Louisiana by using a new method of launching subsea wiper plugs. The method is based on a newly designed subsea casing wiper plug release system, which uses up to three solid wiper plugs loaded in a basket and released by individual darts launched from a surface tool. This design has eliminated the problems sometimes associated with the latching, unlatching and sealing of conventional subsea casing wiper plugs.

  11. Major deepwater pipelay vessel starts work in North Sea

    SciTech Connect (OSTI)

    Heerema, E.P.

    1998-05-04

    Industry`s deepwater pipelaying capability has received a boost this year with the entry into the world`s fleet of Solitaire, a dynamically positioned pipelay vessel of about 350 m including stinger. The converted bulk carrier, formerly the Trentwood, will arrive on station in the North Sea and begin laying pipe this month on Statoil`s Europipe II project, a 600-km, 42-in. OD gas pipeline from Norway to Germany. Next year, the vessel will install pipe for the Exxon U.S.A.`s Gulf of Mexico South Diana development (East Breaks Block 945) in a water depth of 1,643 m and for Mobil Oil Canada as part of the Sable Island Offshore and Energy Project offshore Nova Scotia. Using the S-lay mode, Solitaire is particularly well-suited for laying large lines economically, including the deepwater projects anticipated for the US Gulf of Mexico. Table 1 presents Solitaire`s technical specifications. The design, construction, pipelaying, and justification for building vessels such as the Solitaire are discussed.

  12. Optical geometry across the horizon

    E-Print Network [OSTI]

    Rickard Jonsson

    2007-08-19

    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.

  13. Two physical characteristics of numerical apparent horizons

    E-Print Network [OSTI]

    Ivan Booth

    2007-12-20

    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.

  14. An oblique membrane paradigm for cosmological horizon

    E-Print Network [OSTI]

    Tower Wang

    2014-11-24

    The membrane paradigm is a formalism for studying the event horizon of black holes. After analyzing it with some technical details and realizing it in the Reissner-Nordstrom black hole, we extend the paradigm to cosmological horizons. A standard membrane paradigm is established for the pure de Sitter horizon, and an oblique membrane paradigm is proposed for the trapping horizon of the Friedmann-Lemaitre-Robertson-Walker universe. In the latter case, the cosmological stretched horizon is oblique, thus the running of renormalization parameter is nonzero in the timelike direction and gives a correction to the membrane pressure. In this paradigm, the cosmological equations come from continuity equations of the membrane fluid and the bulk fluid respectively.

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

    SciTech Connect (OSTI)

    Michael Batzle

    2006-04-30

    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.

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

    E-Print Network [OSTI]

    Subenoy Chakraborty; Subhajit Saha

    2015-03-04

    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.

  17. Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part III: The heteroconchs

    E-Print Network [OSTI]

    Hickman, Carole S.

    2015-01-01

    and adjacent Antarctic waters (Bivalvia: Thyasiridae).bivalves of the deep-water Keasey Formation in Oregon, partThyasiridae) from cold-water methane-rich areas of the Sea

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

    E-Print Network [OSTI]

    Via, Rachael Kathleen

    2005-11-01

    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...

  19. Deepwater production drives design of new Gulf gas plant

    SciTech Connect (OSTI)

    Nielsen, R.A. [Amoco Corp., Houston, TX (United States); Petty, L.; Elliot, D.; Chen, R. [International Process Services Inc., Houston, TX (United States)

    1998-03-16

    Exploration and production success in deepwater, eastern Gulf of Mexico has created the need for additional gas-transmission and processing infrastructure. The Destin pipeline and the Pascagoula gas-processing plant are being built to serve this need. The Destin pipeline originates at a junction platform at Main Pass 260 and, after coming ashore near Pascagoula, Miss., will connect with five interstate gas-transmission pipelines, by-passing gas-transportation bottlenecks in Louisiana and Alabama. The Pascagoula plant will be built near the point the pipeline comes ashore and immediately before the first compressor station. The paper discusses handling condensate, design goals, achieving objectives, low life-cycle cost, and project schedule.

  20. www.ictas.vt.edu NEW HORIZONS

    E-Print Network [OSTI]

    Crawford, T. Daniel

    . Foster is a new Associate ProfessorinVirginiaTechwww.ictas.vt.edu NEW HORIZONS ICTAS SEMINAR SERIES Smart Materials Based on Cellulose Nanocrystals microelectrodes. Herein, the fabrication of a new generation of stimuli-responsive, mechanically adaptive

  1. THE EVENT HORIZON OF M87

    E-Print Network [OSTI]

    Broderick, Avery E.

    The 6 × 10[superscript 9] M[subscript ?] 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 ...

  2. A PLAN FOR A NEW HORIZON

    E-Print Network [OSTI]

    A PLAN FOR A NEW HORIZON ENVISIONING VIRGINIA TECH 2012-2018 STRATEGIC PLAN #12;Envisioning VirginiaTech 2012-2018 II Contents A PLAN FOR A NEW HORIZON E n v i s i o n i n g V i r g i n i a T e c h 2 Inspiring creativity, curiosity, and critical thinking 12 A new vision for undergraduate general education

  3. Phantom Energy and the Cosmic Horizon: Rh is still not a horizon!

    E-Print Network [OSTI]

    Geraint F. Lewis

    2013-01-02

    There has been a recent spate of papers on the Cosmic Horizon, an apparently fundamental, although unrecognised, property of the universe. The misunderstanding of this horizon, it is claimed, demonstrates that our determination of the cosmological makeup of the universe is incorrect, although several papers have pointed out key flaws in these arguments. Here, we identify additional flaws in the most recent claims of the properties of the Cosmic Horizon in the presence of phantom energy, simply demonstrating that it does not act as a horizon, and that its limiting of our view of the universe is a trivial statement.

  4. Fusion of Edge-less and Edge-based Approaches for Horizon Line Detection

    E-Print Network [OSTI]

    Bebis, George

    the horizon line. In the edge-less approach, classification is used to obtain a confidence of horizon-ness. Moreover, we propose fusing the information about the horizon-ness and edge-ness of each pixel. Our

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

    SciTech Connect (OSTI)

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

    2005-08-12

    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.

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

    SciTech Connect (OSTI)

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

    2003-03-20

    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.

  7. Deep-water gravity waves: theoretical estimating of wave parameters

    E-Print Network [OSTI]

    Mindlin, Ilia M

    2014-01-01

    This paper addresses deep-water gravity waves of finite amplitude generated by an initial disturbance to the water. It is assumed that the horizontal dimensions of the initially disturbed body of the water are much larger than the magnitude of the free surface displacement in the origin of the waves. Initially the free surface has not yet been displaced from its equilibrium position, but the velocity field has already become different from zero. This means that the water at rest initially is set in motion suddenly by an impulse. Duration of formation of the wave origin and the maximum water elevation in the origin are estimated using the arrival times of the waves and the maximum wave-heights at certain locations obtained from gauge records at the locations, and the distances between the centre of the origin and each of the locations. For points situated at a long distance from the wave origin, forecast is made for the travel time and wave height at the points. The forecast is based on the data recorded by th...

  8. Deep-water gravity waves: nonlinear theory of wave groups

    E-Print Network [OSTI]

    Mindlin, I M

    2014-01-01

    Nonlinear initial-boundary value problem on deep-water gravity waves of finite amplitude is solved approximately (up to small terms of higher order) assuming that the waves are generated by an initial disturbance to the water and the horizontal dimensions of the initially disturbed body of the water are much larger than the magnitude of the free surface displacement. A numerable set of specific free surface waves is obtained in closed form and it is shown that free surface waves produced by an arbitrary initial disturbance to the water is a combination (not superposition: the waves are nonlinear) of the specific waves. A set of dispersive wave packets is found with one-to-one correspondence between the packets and positive integers, say, packet numbers, such that any initial free surface displacement gradually disintegrates into a number (limited or unlimited, depending on initial conditions) of the wave packets. The greater the packet number, the shorter the wavelength of the packet's carrier wave component,...

  9. Re: Account 2155-E7P10 -Deepwater Oil Spill sand-berm report Jack L Kindinger 0 Rebecca J Deckard 05/26/201006:08 PM

    E-Print Network [OSTI]

    Re: Account 2155-E7P10 - Deepwater Oil Spill sand-berm report t Jack L Kindinger 0 Rebecca J Re: Account 2155-E7P10 -- Deepwater Oil spill sand-berm >, kcrutch > > > > > > > > Hey, Kim. > OS/26/2010 12:55 PM Re: Account 21SS-E7PIO -- Deepwater Oil Spill sand-berm > Just wanted

  10. AVA simultaneous inversion of partially stacked seismic amplitude data for the spatial delineation of lithology and fluid units of deepwater

    E-Print Network [OSTI]

    Torres-Verdín, Carlos

    of lithology and fluid units of deepwater hydrocarbon reservoirs in the central Gulf of Mexico Arturo Contreras and delineate deepwater hydrocarbon reservoirs in the central Gulf of Mexico. Detailed AVA fluid/ lithology to fluid substitution. AVA reflectivity and angle-gather modeling indicate that the shale/sand interfaces

  11. INFLUENCE OF MECHANICAL COMPACTION AND CLAY MINERAL DIAGENESIS ON THE MICROFABRIC AND PORE-SCALE PROPERTIES OF DEEP-WATER

    E-Print Network [OSTI]

    -SCALE PROPERTIES OF DEEP-WATER GULF OF MEXICO MUDSTONES ANDREW C. APLIN 1 , INGO F. MATENAAR 1 , { , DOUGLAS K 1.8 and 5.8 km in the deep-water Gulf of Mexico. Mechanical compaction has reduced the porosity. MCCARTY 2 AND BEN A. VAN DER PLUIJM 3 1 NRG, School of Civil Engineering and Geosciences and Institute

  12. An ecologically mixed brachiopod fauna from Changhsingian deep-water basin of South China: consequence of end-Permian

    E-Print Network [OSTI]

    Tong, Jinnan

    An ecologically mixed brachiopod fauna from Changhsingian deep-water basin of South China 31: An ecologically mixed brachiopod fauna from Changhsingian deep-water basin of South China Permian Shaiwa Group of the Ziyun area of Guizhou, South China is a deep- water facies succession

  13. Evidence for the Black Hole Event Horizon

    E-Print Network [OSTI]

    Ramesh Narayan; Jeremy S. Heyl

    2002-04-26

    Roughly a dozen X-ray binaries are presently known in which the compact accreting primary stars are too massive to be neutron stars. These primaries are identified as black holes, though there is as yet no definite proof that any of the candidate black holes actually possesses an event horizon. We discuss how Type I X-ray bursts may be used to verify the presence of the event horizon in these objects. Type I bursts are caused by thermonuclear explosions when gas accretes onto a compact star. The bursts are commonly seen in many neutron star X-ray binaries, but they have never been seen in any black hole X-ray binary. Our model calculations indicate that black hole candidates ought to burst frequently if they have surfaces. Based on this, we argue that the lack of bursts constitutes strong evidence for the presence of event horizons in these objects.

  14. Secretaries Chu and Salazar to Convene Meeting on Strengthening...

    Energy Savers [EERE]

    leaders to discuss how to strengthen capabilities for responding to potential blowouts of oil and gas wells in deepwaters on the Outer Continental Shelf. The September 22, 2010...

  15. New design of a guidelineless horizontal tree for deepwater ESP wells

    SciTech Connect (OSTI)

    Olijnik, L.A.; Vigesa, S.; Paula, M.T.R.; Figueiredo, M.W. de; Rutherford, H.W.

    1996-12-31

    This paper presents the new design of a horizontal tree for deepwater installation, as a key piece of equipment for application of a Electrical Submersible Pump in Subsea Wells. The production from subsea wells equipped with ESPs is a reality since October/94 with the first installation in Campos Basin. The horizontal tree adds simplicity to workover operations expected to be two to three times more frequency when compared to natural flow or gas lifted wells. The design and fabrication of the deepwater horizontal tree is a result of a Technological Cooperation Agreement. The design incorporates new solutions, mainly in diverless guidelineless connection of power cables and flowlines using the vertical connection system. The guidelineless horizontal subsea tree is fully prepared to be integrated on the new manifolds being designed for the Brazilian deepwater oilfields. The applications of the horizontal trees in subsea ESP wells reduce intervention cost, increasing economical attractiveness and scenarios for the applications of this new boosting technology.

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

    SciTech Connect (OSTI)

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

    2005-01-22

    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.

  17. www.ictas.vt.edu NEW HORIZONS

    E-Print Network [OSTI]

    Crawford, T. Daniel

    , it is clear that scales of the order of the total wind farm size are those, which are critical in determiningwww.ictas.vt.edu NEW HORIZONS ICTAS SEMINAR SERIES Wind Plant Aerodynamics- A Spectral Analysis are constructed. Thus, from these modal expansions it is established that low order modes have large contributions

  18. www.ictas.vt.edu NEW HORIZONS

    E-Print Network [OSTI]

    Crawford, T. Daniel

    www.ictas.vt.edu NEW HORIZONS ICTAS SEMINAR SERIES Towards Ubiquitous Cost- competitive Solar Power of energy in one year. Tapping into this enormous potential requires reducing the cost of solar collection% to make solar energy cost competitive with other forms of energy, without subsidies, by the end

  19. NASA's New Horizons Mission Dr. Henry Throop

    E-Print Network [OSTI]

    Throop, Henry

    Battery Camera #12;LORRI (Visible Imager) PEPSSI SWAP (Solar Wind) RALPH (Visible/IR Imager/ Spectrometer't land, and it never comes back to Earth. New Horizons Spacecraft #12;Radio Battery Camera #12;Radio images. Refine radii and orbits. Search for rings and satellites. Search for clouds and hazes. !Ralph

  20. www.ictas.vt.edu NEW HORIZONS

    E-Print Network [OSTI]

    Crawford, T. Daniel

    www.ictas.vt.edu NEW HORIZONS ICTAS SEMINAR SERIES Ion Mediated "Polymerization" of Nanoparticles at the University of Nebraska-Lincoln. Prior to moving to the Midwest, he spent four years at Virginia Tech the University of Massachusetts, Amherst and a B. Tech in Chemical Engineering from the Indian Institute

  1. New Horizons for Deep Subsurface Microbiology

    E-Print Network [OSTI]

    Onstott, Tullis

    life cannot exist. · Experiments being designed for the Deep Un- derground Science and EngineeringNew Horizons for Deep Subsurface Microbiology Subsurface microorganisms may grow slowly 200-m-deep wells along with procedures to monitor for drilling-related contaminants, uncovered

  2. The Wiener Disorder Problem with Finite Horizon

    E-Print Network [OSTI]

    Peskir, Goran

    of earthquakes or tsunamis; seismic signal processing; the appearance of a shock wave front; the studyThe Wiener Disorder Problem with Finite Horizon P. V. Gapeev and G. Peskir # Stochastic Process) time of 'disorder' when the drift of an observed Wiener process changes from one value to another

  3. 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

  4. 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

    2007-12-13

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

  5. 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 and drilling efforts in the Barents Sea, but also the challenges of harsh weather, darkness, and ice. It also keep drilling? The Present Study Some organizations, such as Statoil and the Foreign Mi- nistry, claim

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

    E-Print Network [OSTI]

    Schubert, Jessica

    2012-07-16

    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...

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

    E-Print Network [OSTI]

    Declines in deepwater sculpin Myoxocephalus thompsonii energy density associated thompsonii energy density associated with the disappearance of Diporeia spp. in lakes Huron and Michigan (in 2001 and 2009), and in Lake Huron off Harbor Beach, Michigan (in 2007) for energy density and diet

  8. Evidence for the Black Hole Event Horizon

    E-Print Network [OSTI]

    Ramesh Narayan

    2003-10-23

    Astronomers have discovered many candidate black holes in X-ray binaries and in the nuclei of galaxies. The candidate objects are too massive to be neutron stars, and for this reason they are considered to be black holes. While the evidence based on mass is certainly strong, there is no proof yet that any of the objects possesses the defining characteristic of a black hole, namely an event horizon. Type I X-ray bursts, which are the result of thermonuclear explosions when gas accretes onto the surface of a compact star, may provide important evidence in this regard. Type I bursts are commonly observed in accreting neutron stars, which have surfaces, but have never been seen in accreting black hole candidates. It is argued that the lack of bursts in black hole candidates is compelling evidence that these objects do not have surfaces. The objects must therefore possess event horizons.

  9. Near-horizon Extreme Kerr Magnetospheres

    E-Print Network [OSTI]

    Compère, G

    2015-01-01

    Analytical solutions to force-free electrodynamics around black holes are fundamental to build simple models of accretion disk and jet dynamics. We present a (non-exhaustive) classification of complex highest weight solutions to the force-free equations in the near-horizon region of the extremal Kerr black hole. Bounds on the weights of solutions are derived from the finiteness of energy and the existence of a variational principle. Two classes of real magnetically dominated solutions, respectively axisymmetric and non-axisymmetric, are described which admit finite energy with respect to the asymptotically flat observer. Subtleties related to the velocity of light surface in the near-horizon region are discussed.

  10. Fiber-optical analogue of the event horizon

    E-Print Network [OSTI]

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

    2008-02-13

    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.

  11. 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

    2015-04-05

    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.

  12. Late Cenomanian – Early Turonian Reconstruction of Intermediate and Deep-Water Circulation in the Proto-Indian Ocean 

    E-Print Network [OSTI]

    Tilghman, David S

    2013-09-24

    with widespread burial of organic carbon (Oceanic Anoxic Event 2 - OAE2). Several factors likely promoted organic carbon burial including increased nutrient input, diminished seafloor oxygen levels, density stratification, enhanced upwelling, and sluggish deep-water...

  13. 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-

    2004-01-01

    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 ...

  14. 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.

    2011-01-01

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

  15. Intermediate- to Deep-Water Circulation Changes on Short and Long Time Scales 

    E-Print Network [OSTI]

    Murphy, Daniel Patrick

    2012-07-16

    . Deborah Thomas Oceanic circulation remains one of the poorly understood elements of the global climate system, despite its importance to planetary heat redistribution and carbon cycling. The nature of deep-water formation and circulation in ancient... oceans are even more poorly constrained. In order to understand climate dynamics of past and future climates we must have a better understanding of the role of deep-ocean circulation. In this dissertation I investigated changes in intermediate...

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

    SciTech Connect (OSTI)

    Dan Nelson; Joseph Hardin; Iosif Lindenmaier; Bradley Isom; Karen Johnson; Nitin Bharadwaj

    1990-01-01

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

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

    SciTech Connect (OSTI)

    Dan Nelson; Joseph Hardin; Iosif Lindenmaier; Bradley Isom; Karen Johnson; Nitin Bharadwaj

    2011-09-14

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

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

    SciTech Connect (OSTI)

    Dan Nelson; Joseph Hardin; Iosif Lindenmaier; Bradley Isom; Karen Johnson; Nitin Bharadwaj

    2011-05-24

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

  19. 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)]

    Dan Nelson; Joseph Hardin; Iosif (Andrei) Lindenmaier; Bradley Isom; Karen Johnson; Nitin Bharadwaj

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

  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)]

    Dan Nelson; Joseph Hardin; Iosif (Andrei) Lindenmaier; Bradley Isom; Karen Johnson; Nitin Bharadwaj

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

  1. 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)]

    Dan Nelson; Joseph Hardin; Iosif (Andrei) Lindenmaier; Bradley Isom; Karen Johnson; Nitin Bharadwaj

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

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

    E-Print Network [OSTI]

    Brian Smith

    2007-10-04

    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.

  3. Dynamical Horizons: Energy, Angular Momentum, Fluxes and Balance Laws

    E-Print Network [OSTI]

    Abhay Ashtekar; Badri Krishnan

    2002-11-03

    Dynamical horizons are considered in full, non-linear general relativity. Expressions of fluxes of energy and angular momentum carried by gravitational waves across these horizons are obtained. Fluxes are local, the energy flux is positive and change in the horizon area is related to these fluxes. The flux formulae also give rise to balance laws analogous to the ones obtained by Bondi and Sachs at null infinity and provide generalizations of the first and second laws of black hole mechanics.

  4. Air-Shower Spectroscopy at horizons

    E-Print Network [OSTI]

    D. Fargion

    2005-11-20

    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.

  5. The Event Horizon of M87

    E-Print Network [OSTI]

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

    2015-01-01

    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...

  6. Cosmic Censorship: Formation of a Shielding Horizon Around a Fragile Horizon

    E-Print Network [OSTI]

    Shahar Hod

    2013-02-27

    The weak cosmic censorship conjecture asserts that spacetime singularities that arise in gravitational collapse are always hidden inside of black holes, invisible to distant observers. This conjecture, put forward by Penrose more than four decades ago, is widely believed to be one of the basic principles of nature. However, a complete proof of this hypothesis is still lacking and the validity of the conjecture has therefore remained one of the most important open questions in general relativity. In this study we analyze a gedanken experiment which is designed to challenge cosmic censorship by trying to overcharge a Reissner-Nordstr\\"om black hole: a charged shell is lowered {\\it adiabatically} into the charged black hole. The mass-energy delivered to the black hole can be red-shifted by letting the dropping point of the shell approach the black-hole horizon. On the other hand, the electric charge of the shell is not red-shifted by the gravitational field of the black hole. It therefore seems, at first sight, that the charged shell is not hindered from entering the black hole, overcharging it and removing its horizon. However, in the present study we prove that the exposure of a naked singularity to distant observers is actually excluded due to the formation of a new (and {\\it larger}) horizon around the original black hole. Moreover, we shall prove that this new horizon is already formed {\\it before} the charged shell crosses the original black-hole horizon. This result, which seems to have been previously overlooked, guarantees the validity of the weak cosmic censorship conjecture in this type of gedanken experiments.

  7. Horizons versus singularities in spherically symmetric space-times

    SciTech Connect (OSTI)

    Bronnikov, K. A.; Elizalde, E.; Odintsov, S. D.; Zaslavskii, O. B.

    2008-09-15

    We discuss different kinds of Killing horizons possible in static, spherically symmetric configurations and recently classified as 'usual', 'naked', and 'truly naked' ones depending on the near-horizon behavior of transverse tidal forces acting on an extended body. We obtain the necessary conditions for the metric to be extensible beyond a horizon in terms of an arbitrary radial coordinate and show that all truly naked horizons, as well as many of those previously characterized as naked and even usual ones, do not admit an extension and therefore must be considered as singularities. Some examples are given, showing which kinds of matter are able to create specific space-times with different kinds of horizons, including truly naked ones. Among them are fluids with negative pressure and scalar fields with a particular behavior of the potential. We also discuss horizons and singularities in Kantowski-Sachs spherically symmetric cosmologies and present horizon regularity conditions in terms of an arbitrary time coordinate and proper (synchronous) time. It turns out that horizons of orders 2 and higher occur in infinite proper times in the past or future, but one-way communication with regions beyond such horizons is still possible.

  8. Pluto's Seasons: New Predictions for New Horizons L. A. Young

    E-Print Network [OSTI]

    Young, Leslie A.

    (2012) and Young (in prep). Energy balance for the world that New Horizons will encounter in 2015, and our ability to relate this snapshot to preceding

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

    Open Energy Info (EERE)

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

  10. 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

    2013-01-01

    ects of sounds from seismic exploration on the distributionfrontalis) to Seismic Exploration o? Angola. Aquatic

  11. nh gi Tn tht Ti nguyn Thin nhin Trn du Deepwater Horizon D n Ci thin Tri nghim Ngi i B v Xe

    E-Print Network [OSTI]

    IVProposedEarlyRestorationProject MÔ T D ÁN D án ci thin vic s dng ng dành cho xe p và ngi i b ti Davis Bayou bao gm tng cng ci thin qua khi khong 10.000 c dân ă chuyn n các vùng lân cn. Ngi s dng tuyn ng giao thông công cng này bao gm sung c quy hoch và tng chn s c xây dng nhng ni có ng c nâng lên. D án cng bao gm vic xây dng bin báo

  12. 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

    2013-01-01

    In the Gulf of Mexico increased winds can produce surfaceGulf of Mexico. A third blended satellite product is WIND,

  13. 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

    2013-01-01

    toxicity of Macondo crude oil and dispersant Corexit 9500A(210,000,000 US gallons) of crude oil into the Mississippi

  14. 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 ...

  15. nh Gi Thit Hi Ti Nguyn Thin Nhin ca V Trn Du Deepwater Horizon Cc D n To S Sng Ven B

    E-Print Network [OSTI]

    s c s dng khong 0,3 dm ng b bin và s to ra khon mt dm Anh (acre) vùng môi trng sng Florida ang cng tác. Cu cng trung tâm Thành Ph Pensacola và s hoàn thành vic xây dng công tŕnh ê chn sóng th ba ti ây

  16. 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]

    cng nh môi trng sng trong vnh và dc khu ven bin các bang Texas, Louisiana, Mississippi, Alabama và Florida. Các loài cá và các loài ng vt hoang dă này cng nh môi trng sng h tr ca chúng cung cp lng ln các

  17. 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

    2014-01-01

    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...

  18. Horizon complementarity in elliptic de Sitter space

    E-Print Network [OSTI]

    Lucas Hackl; Yasha Neiman

    2015-02-03

    We study a quantum field in elliptic de Sitter space dS_4/Z_2 - the spacetime obtained from identifying antipodal points in dS_4. We find that the operator algebra and Hilbert space cannot be defined for the entire space, but only for observable causal patches. This makes the system into an explicit realization of the horizon complementarity principle. In the absence of a global quantum theory, we propose a recipe for translating operators and states between observers. This translation involves information loss, in accordance with the fact that two observers see different patches of the spacetime. As a check, we recover the thermal state at the de Sitter temperature as a state that appears the same to all observers. This thermal state arises from the same functional that, in ordinary dS_4, describes the Bunch-Davies vacuum.

  19. On a resource allocation model with infinite horizon

    E-Print Network [OSTI]

    Wagner, Marcus

    into the model which contains a weight function. The new problem, called now the adapted resource allocationOn a resource allocation model with infinite horizon Valeriya Lykina, Sabine Pickenhain and Marcus 13 44, D-03013 Cottbus, Germany #12;On a Resource Allocation Model with Infinite Horizon Valeriya

  20. Aligning Technology Solutions to Address Over-the-Horizon Threats

    E-Print Network [OSTI]

    Aligning Technology Solutions to Address Over-the-Horizon Threats As the world's geopolitical for the U.S. Government bridging the gap between policy development and technology implementation WHAT WE-the-horizon security threats and issues Analysis results to support U.S. policymakers and the science and technology

  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. Overview: Mesozoic through Early Tertiary Stratigraphic Evolution and Deep-water Deposition of the Magallanes Basin, Chile Copyright 2007 by The American Association of Petroleum Geologists. DOI: 10.1306/1240919St563291

    E-Print Network [OSTI]

    Overview: Mesozoic through Early Tertiary Stratigraphic Evolution and Deep-water Deposition the earliest phase of deep-water deposition in the Magallanes foreland basin (Figure 2) (Natland et al., 1974, represents the apex of deep-water sedimentation in the Magallanes basin and was deposited at depths

  3. Thermodynamics of apparent horizon and modified Friedman equations

    E-Print Network [OSTI]

    Ahmad Sheykhi

    2010-12-02

    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. 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...

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

    E-Print Network [OSTI]

    Majekodunmi, Oluwatosin Eniola

    2011-02-22

    -B? ..................................................................................... 58 Figure 21. Evolution of horizon K through time across A-A? ................................ 59 Figure 22. Evolution of horizon K through time across B-B? ................................. 60 1 ? INTRODUCTION Folding theory has... and porosity calculated for intervals 2-12. ? 29 ? Ta ble 2. Fo ld and til t ra tes fo r th e C asc ade an d C hin ook . ? 30 ? Table 3. Sedimentation rates calculated for the Cascade and Chinook folds. ? 31 ? Table 4...

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

    E-Print Network [OSTI]

    Aizenberg, Joanna

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

  7. What Recession? Alaska's FY 2011 Budget

    E-Print Network [OSTI]

    McBeath, Jerry

    2011-01-01

    Deepwater Horizon explosion and massive spill, Interior Secretary Salazar halted all new offshore drilling

  8. InsideIllinoisJuly 15, 2010 Vol. 30, No. 1

    E-Print Network [OSTI]

    Lewis, Jennifer

    of Mexico caused by the explosion of the Deepwater Horizon drilling rig. Tim Lindsey, associate director

  9. On the particle paths and the stagnation points in small-amplitude deep-water waves

    E-Print Network [OSTI]

    Delia Ionescu-Kruse

    2012-02-22

    In order to obtain quite precise information about the shape of the particle paths below small-amplitude gravity waves travelling on irrotational deep water, analytic solutions of the nonlinear differential equation system describing the particle motion are provided. All these solutions are not closed curves. Some particle trajectories are peakon-like, others can be expressed with the aid of the Jacobi elliptic functions or with the aid of the hyperelliptic functions. Remarks on the stagnation points of the small-amplitude irrotational deep-water waves are also made.

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

    SciTech Connect (OSTI)

    Russell E. Fray

    2007-05-31

    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.

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

    SciTech Connect (OSTI)

    Russell E. Fray

    2007-06-30

    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.

  12. Ultra-Deepwater Advisory Committee Elena Melchert Acting Designated Federal Officer

    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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OF APPLICABLEStatutoryin the Nation's,USDA &Ultra-Deepwater Advisory

  13. Perturbative String Thermodynamics near Black Hole Horizons

    E-Print Network [OSTI]

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

    2015-07-01

    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.

  14. Entropy of isolated horizons from quantum gravity condensates

    E-Print Network [OSTI]

    Oriti, Daniele; Sindoni, Lorenzo

    2015-01-01

    We construct condensate states encoding the continuum spherically symmetric quantum geometry of an isolated horizon in full quantum gravity, i.e. without any classical symmetry reduction, in the group field theory formalism. Tracing over the bulk degrees of freedom, we show how the resulting reduced density matrix manifestly exhibits an holographic behavior. We derive a complete orthonormal basis of eigenstates for the reduced density matrix of the horizon and use it to compute the horizon entanglement entropy. By imposing consistency with the isolated horizon boundary conditions and semi-classical thermodynamical properties, we recover the Bekenstein--Hawking entropy formula for any value of the Immirzi parameter. Our analysis supports the equivalence between the von Neumann (entanglement) entropy interpretation and the Boltzmann (statistical) one.

  15. A Fast Moving Horizon Estimation Algorithm Based on Nonlinear ...

    E-Print Network [OSTI]

    2008-02-19

    Department of Chemical Engineering, Carnegie Mellon University, 5000 ... Moving Horizon Estimation (MHE) is an efficient optimization-based strategy ...... concentrations of ethylene, butane, methane and impurities throughout the plant units.

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

    E-Print Network [OSTI]

    Gerui Chen; Xiaoning Wu; Sijie Gao

    2014-10-29

    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.

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

    E-Print Network [OSTI]

    Aharon Davidson; Shimon Rubin; Yosef Verbin

    2012-11-09

    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. Quantum mechanics emerges from information theory applied to causal horizons

    E-Print Network [OSTI]

    Jae-Weon Lee

    2011-02-28

    It is suggested that quantum mechanics is not fundamental but emerges from classical information theory applied to causal horizons. The path integral quantization and quantum randomness can be derived by considering information loss of fields or particles crossing Rindler horizons for accelerating observers. This implies that information is one of the fundamental roots of all physical phenomena. The connection between this theory and Verlinde's entropic gravity theory is also investigated.

  19. Quantum mechanics emerges from information theory applied to causal horizons

    E-Print Network [OSTI]

    Lee, Jae-Weon

    2010-01-01

    It is suggested that quantum mechanics is not fundamental but emerges from information theory applied to a causal horizon. The path integral quantization and quantum randomness can be derived by considering information loss of fields or particles crossing Rindler horizons for accelerating observers. This implies that information is one of the fundamental root of all physical phenomena. The connection between this theory and Verlinde's entropic gravity theory is also investigated.

  20. Distributional Schwarzschild Geometry from nonsmooth regularization via Horizon

    E-Print Network [OSTI]

    Jaykov Foukzon

    2015-06-24

    In this paper we leave the neighborhood of the singularity at the origin and turn to the singularity at the horizon. Using nonlinear superdistributional geometry and supergeneralized functions it seems possible to show that the horizon singularity is not only a coordinate singularity without leaving Schwarzschild coordinates. However the Tolman formula for the total energy $E$ of a static and asymptotically flat spacetime, gives $E=m$, as it should be. New class Colombeau solutions to Einstein field equations is obtained.

  1. Deep-Sea Research I 53 (2006) 17181728 A North Atlantic deep-water eddy in the

    E-Print Network [OSTI]

    Miami, University of

    2006-01-01

    Deep-Sea Research I 53 (2006) 1718­1728 A North Atlantic deep-water eddy in the Agulhas Current the deep waters, pinching off an eddy, which later detached from the slope current and was carried. Keywords: Circulation; Indian Ocean; Boundary currents; Agulhas Current; Deep water; Oceanic eddies 1

  2. Deep-Sea Research I 50 (2003) 10791098 An additional deep-water mass in Drake Passage as

    E-Print Network [OSTI]

    Stevens, David

    2003-01-01

    Deep-Sea Research I 50 (2003) 1079­1098 An additional deep-water mass in Drake Passage as revealed Circumpolar Deep Water (LCDW, UCDW), and is concentrated towards the northern continental slope. 3 He water mass analysis (including 3 He as a parameter), we find that deep waters as met at the 43 S Pacific

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

    E-Print Network [OSTI]

    Jones, Landon 1989-

    2011-05-10

    , this mode did not operate in the geologic past. A growing body of Nd isotope data from fossil fish debris is being used to reconstruct the ancient mode of deep-water circulation throughout the early Cenozoic greenhouse interval. Recent data from previous...

  4. Moving horizon estimation for distributed nonlinear systems with application to cascade river reaches 6

    E-Print Network [OSTI]

    Ferrari-Trecate, Giancarlo

    . Keywords: Large scale systems, moving horizon estimator, system partitioning, hydro power valley. 1

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

    E-Print Network [OSTI]

    Saugata Mitra; Subhajit Saha; Subenoy Chakraborty

    2015-03-10

    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.

  6. Deep-Water Flow over the Lomonosov Ridge in the Arctic Ocean M.-L. TIMMERMANS, P. WINSOR, AND J. A. WHITEHEAD

    E-Print Network [OSTI]

    Winsor, Peter

    the geothermal heat flux or diffusive fluxes at the deep-water boundaries. 1. Introduction The two main basins horizontal or vertical gradients in 14 C in the Canadian Basin (Makarov and Canada Ba- sins) below 2250 m

  7. 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.

    2011-01-01

    regain control of the well and that drilling the relief wellA MORATORIUM ON ALL DRILLING OF WELLS 1 (2010), available atbillion to build. Drilling a deep-water well can add another

  8. 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.

    2011-01-01

    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

  9. 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

    2006-01-01

    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.

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

    E-Print Network [OSTI]

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

    2012-11-02

    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.

  11. Horizons and Tunneling in the Euclidean False Vacuum

    E-Print Network [OSTI]

    Kate Marvel; Neil Turok

    2007-12-17

    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.

  12. Thermodynamics on the apparent horizon in generalized gravity theories

    E-Print Network [OSTI]

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

    2008-01-17

    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.

  13. What happens to Petrov classification, on horizons of axisymmetric dirty black holes

    SciTech Connect (OSTI)

    Tanatarov, I. V.; Zaslavskii, O. B.

    2014-02-15

    We consider axisymmetric stationary dirty black holes with regular non-extremal or extremal horizons, and compute their on-horizon Petrov types. The Petrov type (PT) in the frame of the observer crossing the horizon can be different from that formally obtained in the usual (but singular in the horizon limit) frame of an observer on a circular orbit. We call this entity the boosted Petrov type (BPT), as the corresponding frame is obtained by a singular boost from the regular one. The PT off-horizon can be more general than PT on-horizon and that can be more general than the BPT on horizon. This is valid for all regular metrics, irrespective of the extremality of the horizon. We analyze and classify the possible relations between the three characteristics and discuss the nature and features of the underlying singular boost. The three Petrov types can be the same only for space-times of PT D and O off-horizon. The mutual alignment of principal null directions and the generator in the vicinity of the horizon is studied in detail. As an example, we also analyze a special class of metrics with utra-extremal horizons (for which the regularity conditions look different from the general case) and compare their off-horizon and on-horizon algebraic structure in both frames.

  14. 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

    1995-08-01

    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.

  15. Evolution of the horizons for dark energy universe

    E-Print Network [OSTI]

    Ritabrata Biswas; Nairwita Mazumder; Subenoy Chakraborty

    2011-06-12

    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.

  16. 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

  17. Soil Horizons Some Noteworthy Soil Science in Wisconsin

    E-Print Network [OSTI]

    Meyers, Stephen R.

    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

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

    E-Print Network [OSTI]

    Sontag, Eduardo

    Adaptive Receding Horizon Control of a Distributed Collector Solar Field J.M. Igreja, J. M. Lemos for a distributed collector solar field which ex- plicitly explores its distributed parameter character. The plant considered is a distributed collector solar field, being described by a nonlinear hyperbolic partial

  19. 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

  20. A moving horizon solution to the gas pipeline optimization problem

    E-Print Network [OSTI]

    Grossmann, Ignacio E.

    discharge pressures and supplier flow rates for Parameters Forecast of future demand loads for i i i ti describing flow of gas through a pipe. Optimization scope ­ Compression energy for the supplier to be minimized, while satisfying gas demands, contract pressures and physical constraints. Moving Horizon

  1. Horizon Report > 2014 Library Edition The NMC Horizon Report > 2014 Library Edition examines key trends, significant challenges, and

    E-Print Network [OSTI]

    Chen, Yiling

    and research libraries across the globe. #12;iii Introduction 1 Trends Accelerating Technology Adoption in Academic and Research Libraries 4 Fast Trends: Driving technology adoption in academic and research of education around the globe. This volume, the NMC Horizon Report: 2014 Library Edition, examines key trends

  2. Horizon Extender: Long-term Preservation of Data Leakage Evidence in Web Traffic

    E-Print Network [OSTI]

    Lenders, Vincent

    @tik.ee.ethz.ch Vincent Lenders armasuisse, Switzerland vincent.lenders@armasuisse.ch ABSTRACT This paper presents Horizon

  3. Design and installation of an ultra deepwater subsea system: How to minimize risks and costs

    SciTech Connect (OSTI)

    Izetti, R.G.; Moreira, J.R.F.

    1994-12-31

    The world`s deepest Subsea Tree was successfully installed offshore Brazil at a water depth of 1,027 m. The psychological barrier of 1,000 m was finally broken. Actually, subsea completion technology reached a point where the fundamental question is no longer whether fields located at water depths beyond 1,000 m can be profitably completed. The key issue now is: is there a better and safer way to do it? PETROBRAS has pursued an aggressive strategy in research and development concept evaluations and various field studies aiming at a continuous decrease in both CAPEX and OPEX. This paper primarily describes the major subsea completion achievements, resulting from this great effort, which among other topics include: implementation of a standardization program; sharp reduction of both subsea completion and drilling time; a new flowline connection method which combines the advantages of both lay-away and pull-in methods; design and future installation of the world first subsea electrical submersible pump; completion equipment simplification and resulting cost reduction. Also addressed are the key safety aspects related to deepwater completions and the equipment design improvement necessary to safely conduct those operations.

  4. Design and installation of an ultra-deepwater subsea system: How to minimize risks and costs

    SciTech Connect (OSTI)

    Izetti, R.G.; Moreira, J.R.F.

    1995-04-01

    The world`s deepest subsea tree was successfully installed offshore Brazil at a water depth of 1,027 m, finally breaking the psychological barrier of 1,000 m. Actually, subsea completion technology has reached a point where the fundamental question no linger is whether fields located at water depths > 1,000 m can be profitably completed; is there a better and safer way to do it is now the key issue. Petrobras has pursued an aggressive strategy in R and D concept evaluations and various field studies aiming at a continuous decrease in both capital and operational expenditures. This paper describes the major subsea completion achievements resulting from this great effort, which include implementation of a standardization program; sharp reduction of subsea completion and drilling time; a new flowline connection method that combines the advantages of lay-away and pull-in methods; design and future installation of the world`s first subsea electrical submersible pump; and completion equipment simplification and resulting cost reduction. Also addressed are the key safety aspects related to deepwater completions and the equipment design improvement necessary to conduct those operations safely.

  5. 12 2013 | netl.doe.gov

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

    can easily flow to the surface, into drinking water aquifers, and even into the ocean in deepwater drilling environments. In rare but extreme cases, a blowout of high-pressure gas...

  6. Thermoelectric DC conductivities and Stokes flows on black hole horizons

    E-Print Network [OSTI]

    Elliot Banks; Aristomenis Donos; Jerome P. Gauntlett

    2015-07-15

    We consider a general class of electrically charged black holes of Einstein-Maxwell-scalar theory that are holographically dual to conformal field theories at finite charge density which break translation invariance explicitly. We examine the linearised perturbations about the solutions that are associated with the thermoelectric DC conductivity. We show that there is a decoupled sector at the black hole horizon which must solve generalised Stokes equations for a charged fluid. By solving these equations we can obtain the DC conductivity of the dual field theory. For one-dimensional lattices we solve the fluid equations to obtain closed form expressions for the DC conductivity in terms of the solution at the black hole horizon. We also determine the leading order DC conductivity for lattices that can be expanded as a perturbative series about translationally invariant solutions.

  7. On Thermodynamics and Phase Space of Near Horizon Extremal Geometries

    E-Print Network [OSTI]

    Hajian, Kamal

    2015-01-01

    Near Horizon Extremal Geometries (NHEG), are geometries which may appear in the near horizon region of the extremal black holes. These geometries have $SL(2,\\mathbb{R})\\!\\times\\!U(1)^n$ isometry, and constitute a family of solutions to the theory under consideration. In the first part of this report, their thermodynamic properties are reviewed, and their three universal laws are derived. In addition, at the end of the first part, the role of these laws in black hole thermodynamics is presented. In the second part of this thesis, we review building their classical phase space in the Einstein-Hilbert theory. The elements in the NHEG phase space manifold are built by appropriately chosen coordinate transformations of the original metric. These coordinate transformations are generated by some vector fields, dubbed "symplectic symmetry generators." To fully specify the phase space, we also need to identify the symplectic structure. In order to fix the symplectic structure, we use the formulation of Covariant Phase...

  8. Thermoelectric DC conductivities and Stokes flows on black hole horizons

    E-Print Network [OSTI]

    Banks, Elliot; Gauntlett, Jerome P

    2015-01-01

    We consider a general class of electrically charged black holes of Einstein-Maxwell-scalar theory that are holographically dual to conformal field theories at finite charge density which break translation invariance explicitly. We examine the linearised perturbations about the solutions that are associated with the thermoelectric DC conductivity. We show that there is a decoupled sector at the black hole horizon which must solve generalised Stokes equations for a charged fluid. By solving these equations we can obtain the DC conductivity of the dual field theory. For one-dimensional lattices we solve the fluid equations to obtain closed form expressions for the DC conductivity in terms of the solution at the black hole horizon. We also determine the leading order DC conductivity for lattices that can be expanded as a perturbative series about translationally invariant solutions.

  9. Thermoelectric DC conductivities and Stokes flows on black hole horizons

    E-Print Network [OSTI]

    Elliot Banks; Aristomenis Donos; Jerome P. Gauntlett

    2015-10-11

    We consider a general class of electrically charged black holes of Einstein-Maxwell-scalar theory that are holographically dual to conformal field theories at finite charge density which break translation invariance explicitly. We examine the linearised perturbations about the solutions that are associated with the thermoelectric DC conductivity. We show that there is a decoupled sector at the black hole horizon which must solve generalised Stokes equations for a charged fluid. By solving these equations we can obtain the DC conductivity of the dual field theory. For Q-lattices and one-dimensional lattices we solve the fluid equations to obtain closed form expressions for the DC conductivity in terms of the solution at the black hole horizon. We also determine the leading order DC conductivity for lattices that can be expanded as a perturbative series about translationally invariant solutions.

  10. A model of eternal accelerated expansion without particle horizon

    E-Print Network [OSTI]

    Wang, Zi-Liang

    2016-01-01

    In our previous paper \\cite{8}, we proposed a cosmological model from the emergence of space, which possesses a significant character of evaluating the vacuum energy from the Hubble constant and the age of universe. And one problem of this model is that there is no inflation in the early universe. In this paper, we aim at resolving this problem which leads us to a rather surprising conclusion that our cosmological model can avoid the horizon and flatness problems.

  11. New Horizons in Gravity: Dark Energy and Condensate Stars

    E-Print Network [OSTI]

    Emil Mottola

    2011-07-25

    Black holes are an apparently unavoidable prediction of classical General Relativity, at least if matter obeys the strong energy condition rho + 3p > 0. However quantum vacuum fluctuations generally violate this condition, as does the eq. of state of cosmological dark energy. When quantum effects are considered, black holes lead to a number of thermodynamic paradoxes associated with the Hawking temperature and assumption of black hole entropy, which are briefly reviewed. It is argued that the largest quantum effects arise from the conformal scalar degrees of freedom generated by the trace anomaly of the stress-energy tensor in curved space. At event horizons these can have macroscopically large backreaction effects on the geometry, potentially removing the classical event horizon of black hole and cosmological spacetimes, replacing them with a quantum phase boundary layer, where the effective value of the gravitational vacuum energy density can change. In the effective theory including the quantum effects of the anomaly, the cosmological term becomes a dynamical condensate, whose value depends upon boundary conditions at the horizon. By taking a positive value in the interior of a fully collapsed star, the effective cosmological term removes any singularity, replacing it with a smooth dark energy de Sitter interior. The resulting gravitational vacuum condensate star (or gravastar) configuration resolves all black hole paradoxes, and provides a testable alternative to black holes as the final quantum mechanical end state of complete gravitational collapse. The observed dark energy of our universe likewise may be a macroscopic finite size effect whose value depends not on Planck scale or other microphysics but on the cosmological Hubble horizon scale itself.

  12. 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

    2010-10-01

    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.

  13. Analogue White Hole Horizon and its Impact on Sediment Transport

    E-Print Network [OSTI]

    Debasmita Chatterjee; Praloy Das; Subir Ghosh; B. S. Mazumder

    2015-05-26

    Motivated by the ideas of analogue gravity, we have performed experiments in a flume where an analogue White Hole horizon is generated, in the form of a wave blocking region, by suitably tuned uniform fluid (water) flow and counter-propagating shallow water waves. We corroborate earlier experimental observations by finding a critical wave frequency for a particular discharge above which the waves are effectively blocked beyond the horizon. An obstacle, in the form of a bottom wave, is introduced to generate a sharp blocking zone. All previous researchers used this obstacle. A novel part of our experiment is where we do not introduce the obstacle and find that wave blocking still takes place, albeit in a more diffused zone. Lastly we replace the fixed bottom wave obstacle by a movable sand bed to study the sediment transport and the impact of the horizon or wave blocking phenomenon on the sediment profile. We find signatures of the wave blocking zone in the ripple pattern.

  14. Analogue White Hole Horizon and its Impact on Sediment Transport

    E-Print Network [OSTI]

    Chatterjee, Debasmita; Ghosh, Subir; Mazumder, B S

    2015-01-01

    Motivated by the ideas of analogue gravity, we have performed experiments in a flume where an analogue White Hole horizon is generated, in the form of a wave blocking region, by suitably tuned uniform fluid (water) flow and counter-propagating shallow water waves. We corroborate earlier experimental observations by finding a critical wave frequency for a particular discharge above which the waves are effectively blocked beyond the horizon. An obstacle, in the form of a bottom wave, is introduced to generate a sharp blocking zone. All previous researchers used this obstacle. A novel part of our experiment is where we do not introduce the obstacle and find that wave blocking still takes place, albeit in a more diffused zone. Lastly we replace the fixed bottom wave obstacle by a movable sand bed to study the sediment transport and the impact of the horizon or wave blocking phenomenon on the sediment profile. We find signatures of the wave blocking zone in the ripple pattern.

  15. Diffusive Evolution of Gaseous and Diffusive Evolution of Gaseous and Hydrate Horizons of Methane in SeabedHydrate Horizons of Methane in Seabed

    E-Print Network [OSTI]

    Banaji,. Murad

    Diffusive Evolution of Gaseous and Diffusive Evolution of Gaseous and Hydrate Horizons of Methane in SeabedHydrate Horizons of Methane in Seabed Denis S. Goldobin (University of Leicester),Denis S. Goldobin"")) MethaneNetMethaneNet Early Career Workshop Early Career Workshop MiltonMilton KeynesKeynes 2929

  16. EaglePicher Horizon Batteries 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTIONRobertsdale, AlabamaETEC GmbH Jump to: navigation, search Name: ETECMountain,EaglePicher Horizon

  17. Non-equilibrium thermodynamics of dark energy on the power-law entropy corrected apparent horizon

    E-Print Network [OSTI]

    M. Umar Farooq; Mubasher Jamil

    2011-11-24

    We investigate the Friedmann-Robertson-Walker (FRW) universe (containing dark energy) as a non-equilibrium (irreversible) thermodynamical system by considering the power-law correction to the horizon entropy. By taking power-law entropy area law which appear in dealing with the entanglement of quantum fields in and out the horizon, we determine the power-law entropy corrected apparent horizon of the FRW universe.

  18. 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

  19. Forecasting stock market returns over multiple time horizons

    E-Print Network [OSTI]

    Kroujiline, Dimitri; Ushanov, Dmitry; Sharov, Sergey V; Govorkov, Boris

    2015-01-01

    In this paper we seek to demonstrate the predictability of stock market returns and explain the nature of this return predictability. To this end, we further develop the news-driven analytic model of the stock market derived in Gusev et al. (2015). This enables us to capture market dynamics at various timescales and shed light on mechanisms underlying certain market behaviors such as transitions between bull- and bear markets and the self-similar behavior of price changes. We investigate the model and show that the market is nearly efficient on timescales shorter than one day, adjusting quickly to incoming news, but is inefficient on longer timescales, where news may have a long-lasting nonlinear impact on dynamics attributable to a feedback mechanism acting over these horizons. Using the model, we design the prototypes of algorithmic strategies that utilize news flow, quantified and measured, as the only input to trade on market return forecasts over multiple horizons, from days to months. The backtested res...

  20. Stability of black holes based on horizon thermodynamics

    E-Print Network [OSTI]

    Ma, Meng-Sen

    2015-01-01

    On the basis of horizon thermodynamics we study the thermodynamic stability of black holes constructed in general relativity and Gauss-Bonnet gravity. In the framework of horizon thermodynamics there are only five thermodynamic variables $E,P,V,T,S$. It is not necessary to consider concrete matter fields, which may contribute to the pressure of black hole thermodynamic system. In non-vacuum cases, we can derive the equation of state, $P=P(V,T)$. According to the requirements of stable equilibrium in conventional thermodynamics, we start from these thermodynamic variables to calculate the heat capacity at constant pressure and Gibbs free energy and analyze the local and global thermodynamic stability of black holes. It is shown that $P>0$ is the necessary condition for black holes in general relativity to be thermodynamically stable, however this condition cannot be satisfied by many black holes in general relativity. For black hole in Gauss-Bonnet gravity negative pressure can be feasible, but only local stab...

  1. Stability of black holes based on horizon thermodynamics

    E-Print Network [OSTI]

    Meng-Sen Ma; Ren Zhao

    2015-11-11

    On the basis of horizon thermodynamics we study the thermodynamic stability of black holes constructed in general relativity and Gauss-Bonnet gravity. In the framework of horizon thermodynamics there are only five thermodynamic variables $E,P,V,T,S$. It is not necessary to consider concrete matter fields, which may contribute to the pressure of black hole thermodynamic system. In non-vacuum cases, we can derive the equation of state, $P=P(V,T)$. According to the requirements of stable equilibrium in conventional thermodynamics, we start from these thermodynamic variables to calculate the heat capacity at constant pressure and Gibbs free energy and analyze the local and global thermodynamic stability of black holes. It is shown that $P>0$ is the necessary condition for black holes in general relativity to be thermodynamically stable, however this condition cannot be satisfied by many black holes in general relativity. For black hole in Gauss-Bonnet gravity negative pressure can be feasible, but only local stable black hole exists in this case.

  2. Azadegan, A. 2013 SupplyChainDisruptions,

    E-Print Network [OSTI]

    Lin, Xiaodong

    semi-submersible exploratory offshore drilling rig Deepwater Horizon in the Gulf of Mexico. What Acceleration Recall #12;Azadegan, A. 2013 2010 Deepwater Horizon oil spill The disruption: Major oil spill from

  3. 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 #12,000 barrels of crude oil #12;Deepwater Horizon Oil Spill May, 2010 #12;Oil on the shore Wetlands and beaches

  4. Cooperative Control of Autonomous Surface Vehicles for Oil Skimming and Cleanup

    E-Print Network [OSTI]

    Sukhatme, Gaurav S.

    . I. INTRODUCTION On April 20, 2010 the Deepwater Horizon drilling rig explosion in the Gulf of Mexico

  5. EnvironmentThe MIT Press 2011 The Fate of Greenland

    E-Print Network [OSTI]

    Jackson, Daniel

    On April 20, 2010, the gigantic drilling rig Deepwater Horizon blew up in the Gulf of Mexico, killing

  6. BERKELEY LAB Bringing Science Solutions to the World

    E-Print Network [OSTI]

    of the explosion of BP's Deepwater Horizon drilling rig in the Gulf of Mexico, a dispersed oil plume was formed

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

    SciTech Connect (OSTI)

    D. Rigby

    2004-11-10

    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).

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

    E-Print Network [OSTI]

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

    2012-04-06

    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.

  9. Flood control of rivers with nonlinear model predictive control and moving horizon estimation

    E-Print Network [OSTI]

    ]. Several studies can be found in literature where MPC is used to control water systems [15], [16] and [5Flood control of rivers with nonlinear model predictive control and moving horizon estimation control (MPC) in combination with moving horizon estimation (MHE) can more effectively be used for flood

  10. Regularity of Horizons and The Area Theorem Piotr T. Chru sciel Erwann Delay y

    E-Print Network [OSTI]

    ChruÂ?ciel, Piotr T.

    Conclusions 51 A The Geometry of C 2 Null Hypersurfaces 52 B Some comments on the area theorem of HawkingRegularity of Horizons and The Area Theorem Piotr T. Chru#19;sciel #3; Erwann Delay y D#19 12, 2000 Abstract We prove that the area of sections of future event horizons in space{ times

  11. Real-time Trajectory Design for Unmanned Aerial Vehicles using Receding Horizon Control

    E-Print Network [OSTI]

    Real-time Trajectory Design for Unmanned Aerial Vehicles using Receding Horizon Control by Yoshiaki Students #12;2 #12;Real-time Trajectory Design for Unmanned Aerial Vehicles using Receding Horizon Control This thesis investigates the coordination and control of fleets of unmanned aerial vehicles (UAVs). Future

  12. Estimating Upper Bounds for Occupancy and Number of Manatees in Areas Potentially Affected by Oil from the

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    States of America Abstract The explosion of the Deepwater Horizon drilling platform created the largest from the Deepwater Horizon Oil Spill Julien Martin1 *, Holly H. Edwards1 , Florent Bled2 and Number of Manatees in Areas Potentially Affected by Oil from the Deepwater Horizon Oil Spill. PLoS ONE 9

  13. VACCINE ANNUAL REPORT YEAR 2 Addendum A -Presentations

    E-Print Network [OSTI]

    Ginzel, Matthew

    Deepwater Horizon drilling rig 130 miles southeast of New Orleans. More than 20,000 personnel are working Classifying Images 4 #12;Identifying Key Entities In A Document Deepwater Horizon Response ­ Situation Report Area Command estimates release rate of oil from Deepwater Horizon at 12,000 to 19,000 barrels per day

  14. Formation of three-dimensional surface waves on deep-water using elliptic solutions of nonlinear Schr\\"odinger equation

    E-Print Network [OSTI]

    Sajjadi, Shahrdad G; Drullion, Frederique

    2014-01-01

    A review of three-dimensional waves on deep-water is presented. Three forms of three dimensionality, namely oblique, forced and spontaneous type, are identified. An alternative formulation for these three-dimensional waves is given through cubic nonlinear Schr\\"odinger equation. The periodic solutions of the cubic nonlinear Schr\\"odinger equation are found using Weierstrass elliptic $\\wp$ functions. It is shown that the classification of solutions depends on the boundary conditions, wavenumber and frequency. For certain parameters, Weierstrass $\\wp$ functions are reduced to periodic, hyperbolic or Jacobi elliptic functions. It is demonstrated that some of these solutions do not have any physical significance. An analytical solution of cubic nonlinear Schr\\"odinger equation with wind forcing is also obtained which results in how groups of waves are generated on the surface of deep water in the ocean. In this case the dependency on the energy-transfer parameter, from wind to waves, make either the groups of wav...

  15. An introduction to local Black Hole horizons in the 3+1 approach to General Relativity

    E-Print Network [OSTI]

    José Luis Jaramillo

    2011-08-11

    We present an introduction to dynamical trapping horizons as quasi-local models for black hole horizons, from the perspective of an Initial Value Problem approach to the construction of generic black hole spacetimes. We focus on the geometric and structural properties of these horizons aiming, as a main application, at the numerical evolution and analysis of black hole spacetimes in astrophysical scenarios. In this setting, we discuss their dual role as an "a priori" ingredient in certain formulations of Einstein equations and as an "a posteriori" tool for the diagnosis of dynamical black hole spacetimes. Complementary to the first-principles discussion of quasi-local horizon physics, we place an emphasis on the "rigidity" properties of these hypersurfaces and their role as privileged geometric probes into near-horizon strong-field spacetime dynamics.

  16. Real-Time Adaptive Management of Soil Salinity Using a Receding Horizon Control Algorithm: A Pilot-Scale Demonstration

    E-Print Network [OSTI]

    Park, Yeonjeong; Harmon, Thomas C

    2009-01-01

    optimization horizon. After the first optimal control is applied for the current management time step, the optimization process

  17. 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; Hakala, Alexandra; Guthrie, George

    2012-09-30

    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

  18. Application of initial data sequences to the study of Black Hole dynamical trapping horizons

    E-Print Network [OSTI]

    Jaramillo, José Luis; Vasset, Nicolas; 10.1063/1.3141305

    2011-01-01

    Non-continuous "jumps" of Apparent Horizons occur generically in 3+1 (binary) black hole evolutions. The dynamical trapping horizon framework suggests a spacetime picture in which these "Apparent Horizon jumps" are understood as spatial cuts of a single spacetime hypersurface foliated by (compact) marginally outer trapped surfaces. We present here some work in progress which makes use of uni-parametric sequences of (axisymmetric) binary black hole initial data for exploring the plausibility of this spacetime picture. The modelling of Einstein evolutions by sequences of initial data has proved to be a successful methodological tool in other settings for the understanding of certain qualitative features of evolutions in restricted physical regimes.

  19. Horizon of quantum black holes in various dimensions

    E-Print Network [OSTI]

    Casadio, Roberto; Giugno, Andrea; Mureika, Jonas

    2015-01-01

    We adapt the horizon wave-function formalism to describe massive static spherically symmetric sources in a general $(1+D)$-dimensional space-time, for $D>3$ and including the $D=1$ case. We find that the probability $P_{\\rm BH} $ that such objects are (quantum) black holes behaves similarly to the probability in the $(3+1)$ framework for $D> 3$. In fact, for $D\\ge 3$, the probability increases towards unity as the mass grows above the relevant $D$-dimensional Planck scale $m_D$, the faster the larger $D$. In contrast, for $D=1$, we find the probability is comparably larger for smaller masses, but $P_{\\rm BH} < 0.5$, suggesting that such lower dimensional black holes are purely quantum and not classical objects. This result is consistent with recent observations that sub-Planckian black holes are governed by an effective two-dimensional gravitation theory. Lastly, we derive Generalised Uncertainty Principle relations for the black holes under consideration, and for all cases find a minimum length scale $L_D...

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

    E-Print Network [OSTI]

    T. M. Adamo; E. T. Newman

    2009-08-05

    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.

  1. New Horizons in Gravity: The Trace Anomaly, Dark Energy and Condensate Stars

    E-Print Network [OSTI]

    Mottola, Emil

    2010-01-01

    General Relativity receives quantum corrections relevant at macroscopic distance scales and near event horizons. These arise from the conformal scalar degrees of freedom in the extended effective field theory of gravity generated by the trace anomaly of massless quantum fields in curved space. The origin of these conformal scalar degrees of freedom as massless poles in two-particle intermediate states of anomalous amplitudes in flat space is exposed. At event horizons the conformal anomaly scalar degrees of freedom can have macroscopically large effects on the geometry, potentially removing the classical event horizon of black hole and cosmological spacetimes, replacing them with a quantum boundary layer where the effective value of the gravitational vacuum energy density can change. In the effective theory, the cosmological term becomes a dynamical condensate, whose value depends upon boundary conditions near the horizon. In the conformal phase where the anomaly induced fluctutations dominate, and the conden...

  2. New Horizons for Spatial Data Quality Research Suzie Larrive, Yvan Bdard, Marc Gervais & Tania Roy

    E-Print Network [OSTI]

    New Horizons for Spatial Data Quality Research Suzie Larrivée, Yvan Bédard, Marc Gervais & Tania, Canada Suzie.Larrivee@scg.ulaval.ca, Yvan.Bedard@scg.ulaval.ca, Marc.Gervais@scg.ulaval.ca, Tania.Roy.2

  3. FINDING KBO FLYBY TARGETS FOR NEW HORIZONS JOHN SPENCER and MARC BUIE

    E-Print Network [OSTI]

    Young, Leslie A.

    FINDING KBO FLYBY TARGETS FOR NEW HORIZONS JOHN SPENCER and MARC BUIE Lowell Observatory LESLIE maintained by Marc Buie at http://www.lowell.edu/buie/kbo/kbofollowup.html (histogram, right axis). The good

  4. First law of thermodynamics for dynamical apparent horizons and the entropy of Friedmann universes

    E-Print Network [OSTI]

    Viaggiu, Stefano

    2015-01-01

    Recently, we have generalized the Bekenstein-Hawking entropy formula for black holes embedded in expanding Friedmann universes. In this letter, we begin the study of this new formula to obtain the first law of thermodynamics for dynamical apparent horizons. In this regard we obtain a generalized expression for the internal energy $U$ together with a distinction between the dynamical temperature $T_D$ of apparent horizons and the related one due to thermodynamics formulas. Remarkable, when the expression for $U$ is applied to the apparent horizon of the universe, we found that this internal energy is a constant of motion. Our calculations thus show that the total energy of our spatially flat universe including the gravitational contribution, when calculated at the apparent horizon, is an universal constant that can be set to zero from simple dimensional considerations. This strongly support the holographic principle.

  5. US Hydro 2011 Tampa, FL April 2528, 2011 1 On the Horizon

    E-Print Network [OSTI]

    New Hampshire, University of

    US Hydro 2011 Tampa, FL April 2528, 2011 1 On the Horizon: Better Bottom Detection for areas the eelgrass canopy and seafloor. #12;US Hydro 2011 Tampa, FL April 2528, 2011 2 Figure 1: Bottom detections

  6. Thermal Conductivity of the Potential Repository Horizon Model Report

    SciTech Connect (OSTI)

    J. Ramsey

    2002-08-29

    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.

  7. Wave breaking onset of two-dimensional deep-water wave groups in the presence and absence of wind

    E-Print Network [OSTI]

    Saket, Arvin; Banner, Michael L; Barthelemy, Xavier; Allis, Michael J

    2015-01-01

    The criterion for the initiation of breaking demonstrated numerically by Barthelemy et al. (2015) has been investigated in the laboratory for unidirectional wave groups in deep-water and extended to include conditions of moderate wind forcing. Thermal Image Velocimetry was used to compare measurements of the crest surface water particle velocity (Us) with the wave crest velocity (C), as determined by an array of closely-spaced wave gauges. The energy flux ratio Bx = Us/C that distinguishes maximum recurrence from marginal breaking was found to be 0.840 $\\pm$ 0.016 in good agreement with the numerically determined value of 0.855. Further, the threshold was found to be robust for different classes of wave groups of distinct characteristic steepness at the breaking threshold. Increasing wind forcing from zero to U{\\lambda}/4/C0=1.42 increased this threshold by 2%. Increasing the spectral bandwidth (decreasing the Benjamin-Feir index from 0.39 to 0.31) systematically reduced the threshold by 1.5%.

  8. The BP Oil Spill: One Year Later College Station, September 19 The Mosbacher Institute brought together an expert panel to discuss

    E-Print Network [OSTI]

    Boas, Harold P.

    in the Gulf of Mexico following the now-infamous explosion on the BP Deepwater Horizon drilling platform continental or deepwater wells. Meanwhile, noted Griffin, the economic and legal consequences of the spill have worked on that April day. In the Deepwater Horizon well, however, high pressures formed a kink

  9. Small black holes on branes: Is the horizon regular or singular?

    SciTech Connect (OSTI)

    Karasik, D.; Sahabandu, C.; Suranyi, P.; Wijewardhana, L.C.R.

    2004-09-15

    We investigate the following question: Consider a small mass, with {epsilon} (the ratio of the Schwarzschild radius and the bulk curvature length) much smaller than 1, that is confined to the TeV brane in the Randall-Sundrum I scenario. Does it form a black hole with a regular horizon, or a naked singularity? The metric is expanded in {epsilon} and the asymptotic form of the metric is given by the weak field approximation (linear in the mass). In first order of {epsilon} we show that the iteration of the weak field solution, which includes only integer powers of the mass, leads to a solution that has a singular horizon. We find a solution with a regular horizon but its asymptotic expansion in the mass also contains half integer powers.

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

    E-Print Network [OSTI]

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

    2015-03-24

    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.

  11. Quantization of area for event and Cauchy horizons of the Kerr-Newman black hole

    E-Print Network [OSTI]

    Visser, Matt

    2012-01-01

    Based on various string theoretic constructions, there have been repeated suggestions that the areas of black hole event horizons should be quantized in a quite specific manner, involving linear combinations of square roots of natural numbers. It is important to realise the significant physical limitations of such proposals when one attempts to extend them outside their original framework. Specifically, in their most natural and direct physical interpretations, these specific proposals for horizon areas fail for the ordinary Kerr-Newman black holes in (3+1) dimensions, essentially because the fine structure constant is not an integer. A more baroque interpretation involves asserting the fine structure constant is the square root of a rational number; but such a proposal has its own problems. Insofar as one takes (3+1) general relativity (plus the usual quantization of angular momentum and electric charge) as being paramount, the known explicitly calculable spectra of horizon areas for the physically compellin...

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

    E-Print Network [OSTI]

    M. Sharif; G. Mustafa

    2008-09-09

    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.

  13. 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.

  14. Force-free magnetosphere on near-horizon geometry of near-extreme Kerr black holes

    E-Print Network [OSTI]

    Huiquan Li; Cong Yu; Jiancheng Wang; Zhaoyi Xu

    2015-04-03

    We study force-free magnetospheres in the Blandford-Znajek process from rapidly rotating black holes by adopting the near-horizon geometry of near-extreme Kerr black holes (near-NHEK). It is shown that the Znajek regularity condition on the horizon can be directly derived from the resulting stream equation. In terms of the condition, we split the full stream equation into two separate equations. Approximate solutions around the rotation axis are derived. They are found to be consistent with previous solutions obtained in the asymptotic region. The solutions indicate energy and angular-momentum extraction from the hole.

  15. 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)

    1995-08-01

    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.

  16. Using Marker Horizons and Cryogenic Coring to Monitor Sediment Deposition in Salt Marshes of the Bay of Fundy

    E-Print Network [OSTI]

    Chmura, Gail L.

    marsh samples has advantages over other coring methods. By freezing the salt marsh soil in CryogenicUsing Marker Horizons and Cryogenic Coring to Monitor Sediment Deposition in Salt Marshes that has accumulated over the marker horizon is measured. Cryogenic coring is one method of extracting

  17. 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

  18. 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

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

    E-Print Network [OSTI]

    J. B. Griffiths

    2005-01-05

    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.

  20. Draft Horizon 2020 Work Programme 2016-2017 in the area of

    E-Print Network [OSTI]

    Greifswald, Ernst-Moritz-Arndt-Universität

    installation packages integrating renewable and energy efficiency solutions for heating, cooling and/or hot and Efficient Energy" Important notice: This paper is made public just before the adoption process of the work. The Commission expressly disclaims liability for any future changes of the content of this document. #12;HORIZON

  1. Tokyo Tech International Symposium New Horizon of Electronic Materials Using Abundant Elements

    E-Print Network [OSTI]

    University, Sweden) In Harmony with the Environment: New Materials Harnessing Nature's Energy Flows 14Tokyo Tech International Symposium New Horizon of Electronic Materials Using Abundant Elements Date Theoretical and Computational Approach to New Materials Date: 10:00-19:00, 4th June, 2015: Lecture Session 10

  2. Draft Horizon 2020 Work Programme 2016-2017 in the area of Transport

    E-Print Network [OSTI]

    Greifswald, Ernst-Moritz-Arndt-Universität

    of this document. #12;HORIZON 2020 - Work Programme 2016 - 2017 Smart, green and integrated transport Part 11 ......................................................................................................................... 11 MG-1.1-2016: Reducing energy consumption and environmental impact of aviation........ 12 MG-1................................................................................................................. 19 MG-2.1-2017: Innovations for energy efficiency and emission control in waterborne transport

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

    E-Print Network [OSTI]

    Jonathan Luk; Sung-Jin Oh

    2015-01-19

    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.

  4. One-Dimensional Infinite Horizon Nonconcave Optimal Control Problems Arising in Economic Dynamics

    SciTech Connect (OSTI)

    Zaslavski, Alexander J., E-mail: ajzasl@tx.technion.ac.il [Technion-Israel Institute of Technology, Department of Mathematics (Israel)

    2011-12-15

    We study the existence of optimal solutions for a class of infinite horizon nonconvex autonomous discrete-time optimal control problems. This class contains optimal control problems without discounting arising in economic dynamics which describe a model with a nonconcave utility function.

  5. ALICE: The Ultraviolet Imaging Spectrograph aboard the New Horizons Pluto-Kuiper Belt Mission

    E-Print Network [OSTI]

    Stern, S. Alan

    ABSTRACT The New Horizons ALICE instrument is a lightweight (4.4 kg), low-power (4.4 Watt) imaging-ALICE, for Pluto-ALICE) is a compact, low-cost instrument designed to perform spectroscopic investigations at Southwest Research Institute (SwRI) in the mid-1990s with funds from NASA, JPL, and SwRI1 . Later, the HIPPS

  6. The New Horizons GeometryVisualizer: Planning the Encounter with Pluto

    E-Print Network [OSTI]

    Throop, Henry

    institution: SwRI 2006 launch; 2015 Pluto #12;#12;#12;New Horizons iPhone Camera 1 MP 2 MP Storage 16 GB 16 GB the whole planet? · Designed as a `sandbox' for planning observations. · Not used to program commands into spacecraft. What does GV do? #12;GV Design Goals Priority 2: · Features · Ease of use · Speed · Ease

  7. 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

  8. 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

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

    E-Print Network [OSTI]

    Aristomenis Donos; Jerome P. Gauntlett

    2015-11-12

    Within the context of the AdS/CFT correspondence we show that the DC thermoelectric conductivity can be obtained by solving the linearised, time-independent and forced Navier-Stokes equations on the black hole horizon for an incompressible and charged fluid.

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

    E-Print Network [OSTI]

    Donos, Aristomenis

    2015-01-01

    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.

  11. Financement avec l'Europe: quel horizon pour l'UdeM ?

    E-Print Network [OSTI]

    Charette, André

    Financement avec l'Europe: quel horizon pour l'UdeM ? Midi-BRDV 15 mai 2014 Sophie Gauthier travail pour la subvention et 50 % de leur temps de travail en Europe · Consolidator Grant (objectif: 400 subvention et 50 % de son temps de travail en Europe · Advanced Grant (objectif: 200 pour 2014): ­ chercheur

  12. Thermodynamics of Apparent Horizon and Friedmann Equations in Big Bounce Universe

    E-Print Network [OSTI]

    Molin Liu; Yuling Yang; Jianbo Lv; Lixin Xu

    2014-12-08

    In this paper, the thermodynamics of apparent horizon and Friedmann equations are studied in a big bounce universe typified by a non-singular big bounce, as opposed to a singular big bang. This cosmological model can describe radiation dominated early universe and matter dominated late universe in FRW model. Our calculational results show that Einstein gravitational field equations could be derived by the first law of thermodynamics and the fluid's continuity equation. The connections between thermodynamics and gravity are observed in big bounce universe. In the late stages of cold and hot universes, the apparent horizons are convergent and the time when apparent horizons begin to bounce essentially in agreement with that of universe's scalar factor. In the early stage of both cold and hot universes, we find there is only one geometry containing a 4D de Sitter universe with general state parameter. Furthermore, we also find the form of apparent horizon in early universe is strongly dependent on the extra dimension which suggests that the effect of extra dimension could be found in early universe.

  13. Class not > 1% relative

    E-Print Network [OSTI]

    Weston, Ken

    on the Deepwater Horizon (DWH) drilling unit caused the subsequent release of ~5 million barrels of crude oil Crude Organic Acids %RelativeAbundance Heteroatom Class Heteroatom Class Distribution of Deepwater

  14. Safety First? This copy is for your personal, non-commercial use only. This article may not be reprinted for commercial

    E-Print Network [OSTI]

    Sniadecki, Nathan J.

    , it has been estimated that executives managing the drilling aboard the ill-fated Deepwater Horizon had's reputation--and sales--took a nosedive. And no company associated with the disaster aboard the Deepwater

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

    E-Print Network [OSTI]

    Dodelson, Matthew

    2015-01-01

    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...

  16. Solar Wind at 33 AU: Setting Bounds on the Pluto Interaction for New Horizons

    E-Print Network [OSTI]

    Bagenal, F; Elliott, H A; Hill, M E; Lisse, C M; McComas, D J; McNutt,, R L; Richardson, J D; Smith, C W; Strobel, D F

    2015-01-01

    The NASA New Horizons spacecraft flies past Pluto on July 14, 2015, carrying two instruments that detect charged particles. Pluto has a tenuous, extended atmosphere that is escaping the weak gravity of the planet. The interaction of the solar wind with the escaping atmosphere of Pluto depends on solar wind conditions as well as the vertical structure of the atmosphere. We have analyzed Voyager 2 particles and fields measurements between 25 and 39 AU and present their statistical variations. We have adjusted these predictions to allow for the declining activity of the Sun and solar wind output. We summarize the range of SW conditions that can be expected at 33 AU and survey the range of scales of interaction that New Horizons might experience. Model estimates for the solar wind stand-off distance vary from approximately 7 to 1000 RP with our best estimate being around 40 RP (where we take the radius of Pluto to be RP=1184 km).

  17. Hamilton-Jacobi Tunneling Method for Dynamical Horizons in Different Coordinate Gauges

    E-Print Network [OSTI]

    Roberto Di Criscienzo; Sean A. Hayward; Mario Nadalini; Luciano Vanzo; Sergio Zerbini

    2009-12-03

    Previous work on dynamical black hole instability is further elucidated within the Hamilton-Jacobi method for horizon tunneling and the reconstruction of the classical action by means of the null-expansion method. Everything is based on two natural requirements, namely that the tunneling rate is an observable and therefore it must be based on invariantly defined quantities, and that coordinate systems which do not cover the horizon should not be admitted. These simple observations can help to clarify some ambiguities, like the doubling of the temperature occurring in the static case when using singular coordinates, and the role, if any, of the temporal contribution of the action to the emission rate. The formalism is also applied to FRW cosmological models, where it is observed that it predicts the positivity of the temperature naturally, without further assumptions on the sign of the energy.

  18. New Cosmologies on the Horizon. Cosmology and Holography in bigravity and massive gravity

    SciTech Connect (OSTI)

    Tolley, Andrew James

    2013-03-31

    The goal of this research program is to explore the cosmological dynamics, the nature of cosmological and black hole horizons, and the role of holography in a new class of infrared modified theories of gravity. This will capitalize of the considerable recent progress in our understanding of the dynamics of massive spin two fields on curved spacetimes, culminating in the formulation of the first fully consistent theories of massive gravity and bigravity/bimetric theories.

  19. Fate and Speciation of Gasoline-Derived Lead in Organic Horizons of the Northeastern USA

    SciTech Connect (OSTI)

    Kaste,J.; Bostick, B.; Friedland, A.; Schroth, A.; Siccama, T.

    2006-01-01

    Although legislation in the late 1970s significantly reduced atmospheric lead (Pb) inputs to ecosystems in North America, organic (O) horizons in forests of the northeastern USA still contain up to 30 kg of gasoline-derived Pb ha{sup -1}. The residence time, geochemical behavior, and fate of this contaminant Pb in soils is poorly understood. Here we use forest floor time series data and synchrotron-based X-ray techniques to examine the mobility and speciation of Pb in O horizons collected from remote sites across the northeastern USA. At high elevation (>800 m) sites in Vermont and New York, samples collected from similar locations in 1980, 1990, and early 2000 had indistinguishable Pb contents, ranging ({+-}1{sigma}) from 11 to 29 kg Pb ha{sup -1}. However, at lower elevation and lower latitude sites with mixed vegetation, significant decreases in Pb amount were observed during the two-decade study period. Lower elevation sites ranged from 10 to 20 kg Pb ha{sup -1} in 1980, and from 2 to 10 kg Pb ha{sup -1} 20 yr later. Lead-enriched soil grains were determined to be amorphous with microfocused X-ray diffraction, and Pb concentrations correlated well with Fe on maps generated via microfocused X-ray fluorescence. Bulk Pb L{sub III}-edge X-ray absorption spectroscopy of coniferous O horizon samples indicate that Pb is binding to iron-rich soil particles by inner-sphere complexes, most likely to amorphous Fe oxides. Based on our paired regional and microscopic observations, we conclude that Pb is strongly retained in well-drained O horizons, and mobility is governed by decomposition and colloidal transport.

  20. IMAGING THE SUPERMASSIVE BLACK HOLE SHADOW AND JET BASE OF M87 WITH THE EVENT HORIZON TELESCOPE

    E-Print Network [OSTI]

    Lu, Ru-Sen

    The Event Horizon Telescope (EHT) is a project to assemble a Very Long Baseline Interferometry (VLBI) network of millimeter wavelength dishes that can resolve strong field general relativistic signatures near a supermassive ...

  1. Horizon Sensor™

    Office of Energy Efficiency and Renewable Energy (EERE)

    Future mining will be from deeper and thinner seams; profiles of deep coal seams reveal multiple levels of coal and sediment strata or layers. Some of these layers contain greater levels of...

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

    Energy Savers [EERE]

    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...

  3. Marine microbes rapidly adapt to consume ethane, propane, and butane within the dissolved hydrocarbon plume of a natural seep

    E-Print Network [OSTI]

    2015-01-01

    Assessment of the spatial and temporal variability of bulk hydrocarbon respiration following the Deepwater Horizon oilthe Coal Oil Point seep. Samples for the method assessment

  4. Natural bacterial communities serve as quantitative geochemical...

    Office of Scientific and Technical Information (OSTI)

    approach to identify sites contaminated with hydrocarbons from the Deepwater Horizon oil spill, finding that altered bacterial communities encode a memory of prior...

  5. IEEE TRANSACTIONS ON SYSTEMS, MAN, AND CYBERNETICS--PART A: SYSTEMS AND HUMANS 1 A Socio-Physical Approach to Systemic Risk

    E-Print Network [OSTI]

    Ulieru, Mihaela

    , metrics, best practices, and lessons learned can be extracted from the financ disasters such as Hurricane Katrina (2005), Deepwater Horizon (2010), and the Japanese earthquake

  6. 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.

  7. Christopher A. Smith Confirmed as Assistant Secretary for Fossil...

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

    he also served as the Designated Federal Official for the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling that was established by President Obama...

  8. Noise Kernel for Self-similar Tolman Bondi Metric: Fluctuations on Cauchy Horizon

    E-Print Network [OSTI]

    Seema Satin; Kinjalk Lochan; Sukratu Barve

    2013-04-12

    We attempt to calculate the point separated Noise Kernel for self similar Tolman Bondi metric, using a method similar to that developed by Eftekharzadeh et. al for ultra-static spacetimes referring to the work by Page. In case of formation of a naked singularity, the Noise Kernel thus obtained is found to be regular except on the Cauchy horizon, where it diverges. The behavior of the noise in case of the formation of a covered singularity is found to be regular. This result seemingly renders back reaction non-negligible which questions the stability of the results obtained from the semiclassical treatment of the self similar Tolman Bondi metric.

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

    E-Print Network [OSTI]

    Tom Banks

    2010-07-22

    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. Chern--Simons--Yang--Mills system in presence of Gribov horizon with fundamental Higgs matter

    E-Print Network [OSTI]

    Arturo J. Gomez; Sebastian Gonzalez; Silvio P. Sorella

    2015-09-29

    In this work we study the behaviour of Yang--Mills--Chern--Simons theory coupled to a Higgs field in the fundamental representation by taking into account the effects of the presence of the Gribov horizon. By analyzing the infrared structure of the gauge field propagator, both confined and de-confined regions can be detected. The confined region corresponds to the appearance of complex poles in the propagators, while the de-confined one to the presence of real poles. One can move from one region to another by changing the parameters of the theory.

  11. Calendar of Events Spring 2011 Wallace Stegner Center -S. J. Quinney College of Law 332 S. 1400 E. Room 101 Salt Lake City, UT 84112 801.585.3440

    E-Print Network [OSTI]

    Capecchi, Mario R.

    CLE. Lunch Provided. March 10 Green Bag Lessons from Disasters: What We Are Learning from the BP Deepwater Blowout in the Gulf of Mexico That We Should Have Learned 21 Years Ago in Alaska Zygmunt Jan Broël of Law 1 hour CLE. Lunch Provided. Wallace Stegner Lecture Classic Lessons from a Little Fish in a Pork

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

    E-Print Network [OSTI]

    Thomas G. Mertens

    2015-06-25

    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.

  13. The New Horizons Pluto Kuiper belt Mission: An Overview with Historical Context

    E-Print Network [OSTI]

    S. Alan Stern

    2007-09-27

    NASA's New Horizons (NH) Pluto-Kuiper belt (PKB) mission was launched on 19 January 2006 on a Jupiter Gravity Assist (JGA) trajectory toward the Pluto system for a 14 July 2015 closest approach; Jupiter closest approach occurred on 28 February 2007. It was competitively selected by NASA for development on 29 November 2001. New Horizons is the first mission to the Pluto system and the Kuiper belt; and will complete the reconnaissance of the classical planets. The ~400 kg spacecraft carries seven scientific instruments, including imagers, spectrometers, radio science, a plasma and particles suite, and a dust counter built by university students. NH will study the Pluto system over a 5-month period beginning in early 2015. Following Pluto, NH will go on to reconnoiter one or two 30-50 kilometer diameter Kuiper belt Objects (KBOs), if NASA approves an extended mission. If successful, NH will represent a watershed development in the scientific exploration of a new class of bodies in the solar system - dwarf planets, of worlds with exotic volatiles on their surfaces, of rapidly (possibly hydrodynamically) escaping atmospheres, and of giant impact derived satellite systems. It will also provide the first dust density measurements beyond 18 AU, cratering records that shed light on both the ancient and present-day KB impactor population down to tens of meters, and a key comparator to the puzzlingly active, former dwarf planet (now satellite of Neptune) called Triton, which is as large as Eris and Pluto.

  14. See a sample reprint in PDF format. Order a reprint of this article now BUSINESS JUNE 24, 2010

    E-Print Network [OSTI]

    Lotko, William

    how to re-draft a moratorium on new deep-water drilling in response to a federal judge's ruling or weather. In the weeks since the Deepwater Horizon caught fire and sank, real life has proven these models scientists and oil companies about deep-water spills. BP's efforts to contain the spill suffered a brief

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

    E-Print Network [OSTI]

    Sourav Bhattacharya; Anirban Saha

    2010-07-22

    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.

  16. Formation of bubbly horizon in liquid-saturated porous medium by surface temperature oscillation

    E-Print Network [OSTI]

    Goldobin, Denis S

    2015-01-01

    We study non-isothermal diffusion transport of a weakly-soluble substance in a liquid-saturated porous medium being in contact with the reservoir of this substance. The surface temperature of the porous medium half-space oscillates in time, which results in a decaying solubility wave propagating deep into the porous medium. In such a system, the zones of saturated solution and non-dissolved phase coexist with the zones of undersaturated solution. The effect is firstly considered for the case of annual oscillation of the surface temperature of water-saturated ground being in contact with atmosphere. We reveal the phenomenon of formation of a near-surface bubbly horizon due to the temperature oscillation. An analytical theory of the phenomenon is developed. Further, the treatment is extended to the case of higher frequency oscillations and case of weakly-soluble solids and liquids.

  17. Formation of bubbly horizon in liquid-saturated porous medium by surface temperature oscillation

    E-Print Network [OSTI]

    Denis S. Goldobin; Pavel V. Krauzin

    2015-10-08

    We study non-isothermal diffusion transport of a weakly-soluble substance in a liquid-saturated porous medium being in contact with the reservoir of this substance. The surface temperature of the porous medium half-space oscillates in time, which results in a decaying solubility wave propagating deep into the porous medium. In such a system, the zones of saturated solution and non-dissolved phase coexist with the zones of undersaturated solution. The effect is firstly considered for the case of annual oscillation of the surface temperature of water-saturated ground being in contact with atmosphere. We reveal the phenomenon of formation of a near-surface bubbly horizon due to the temperature oscillation. An analytical theory of the phenomenon is developed. Further, the treatment is extended to the case of higher frequency oscillations and case of weakly-soluble solids and liquids.

  18. 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

    2014-12-31

    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.

  19. Hot Plasma Modes Across Reissner-Nordstrom de Sitter Horizon in a Veselago Medium

    E-Print Network [OSTI]

    Ifra Noureen; Hafiza Rizwana Kausar

    2015-09-11

    In this manuscript, wave attributes of hot plasma around Reissner- Nordstrom-de Sitter (RN-dS) metric in a Veselago medium are in- vestigated. General relativistic magnetohydrodynamical (GRMHD) equations in planar coordinates for the RN-dS horizon are reformulated by implementation of ADM 3+1 technique. Further, perturba- tion scheme is used to arrive at linearly perturbed GRMHD equations whose component form is used to attain dispersion relations for rotating (non-magnetized and magnetized) plasma. Wave propagation in hot plasma is explained by three dimensional graphical representation of the wave number, refractive index, its change with respect to angular velocity, phase and group velocities. Finally, comparison of wave properties is presented, results reassert the presence of Veselago medium.

  20. Hot Plasma Modes Across Reissner-Nordstrom de Sitter Horizon in a Veselago Medium

    E-Print Network [OSTI]

    Noureen, Ifra

    2015-01-01

    In this manuscript, wave attributes of hot plasma around Reissner- Nordstrom-de Sitter (RN-dS) metric in a Veselago medium are in- vestigated. General relativistic magnetohydrodynamical (GRMHD) equations in planar coordinates for the RN-dS horizon are reformulated by implementation of ADM 3+1 technique. Further, perturba- tion scheme is used to arrive at linearly perturbed GRMHD equations whose component form is used to attain dispersion relations for rotating (non-magnetized and magnetized) plasma. Wave propagation in hot plasma is explained by three dimensional graphical representation of the wave number, refractive index, its change with respect to angular velocity, phase and group velocities. Finally, comparison of wave properties is presented, results reassert the presence of Veselago medium.

  1. The Pluto system: Initial results from its exploration by New Horizons

    E-Print Network [OSTI]

    Stern, S A; Ennico, K; Gladstone, G R; Grundy, W M; McKinnon, W B; Moore, J M; Olkin, C B; Spencer, J R; Weaver, H A; Young, L A; Andert, T; Andrews, J; Banks, M; Bauer, B; Bauman, J; Barnouin, O S; Bedini, P; Beisser, K; Beyer, R A; Bhaskaran, S; Binzel, R P; Birath, E; Bird, M; Bogan, D J; Bowman, A; Bray, V J; Brozovic, M; Bryan, C; Buckley, M R; Buie, M W; Buratti, B J; Bushman, S S; Calloway, A; Carcich, B; Cheng, A F; Conard, S; Conrad, C A; Cook, J C; Cruikshank, D P; Custodio, O S; Ore, C M Dalle; Deboy, C; Dischner, Z J B; Dumont, P; Earle, A M; Elliott, H A; Ercol, J; Ernst, C M; Finley, T; Flanigan, S H; Fountain, G; Freeze, M J; Greathouse, T; Green, J L; Guo, Y; Hahn, M; Hamilton, D P; Hamilton, S A; Hanley, J; Harch, A; Hart, H M; Hersman, C B; Hill, A; Hill, M E; Hinson, D P; Holdridge, M E; Horanyi, M; Howard, A D; Howett, C J A; Jackman, C; Jacobson, R A; Jennings, D E; Kammer, J A; Kang, H K; Kaufmann, D E; Kollmann, P; Krimigis, S M; Kusnierkiewicz, D; Lauer, T R; Lee, J E; Lindstrom, K L; Linscott, I R; Lisse, C M; Lunsford, A W; Mallder, V A; Martin, N; McComas, D J; McNutt, R L; Mehoke, D; Mehoke, T; Melin, E D; Mutchler, M; Nelson, D; Nimmo, F; Nunez, J I; Ocampo, A; Owen, W M; Paetzold, M; Page, B; Parker, A H; Parker, J W; Pelletier, F; Peterson, J; Pinkine, N; Piquette, M; Porter, S B; Protopapa, S; Redfern, J; Reitsema, H J; Reuter, D C; Roberts, J H; Robbins, S J; Rogers, G; Rose, D; Runyon, K; Retherford, K D; Ryschkewitsch, M G; Schenk, P; Schindhelm, E; Sepan, B; Showalter, M R; Singer, K N; Soluri, M; Stanbridge, D; Steffl, A J; Strobel, D F; Stryk, T; Summers, M E; Szalay, J R; Tapley, M; Taylor, A; Taylor, H; Throop, H B; Tsang, C C C; Tyler, G L; Umurhan, O M; Verbiscer, A J; Versteeg, M H; Vincent, M; Webbert, R; Weidner, S; Weigle, G E; White, O L; Whittenburg, K; Williams, B G; Williams, K; Williams, S; Woods, W W; Zangari, A M; Zirnstein, E

    2015-01-01

    The Pluto system was recently explored by NASA's New Horizons spacecraft, making closest approach on 14 July 2015. Pluto's surface displays diverse landforms, terrain ages, albedos, colors, and composition gradients. Evidence is found for a water-ice crust, geologically young surface units, surface ice convection, wind streaks, volatile transport, and glacial flow. Pluto's atmosphere is highly extended, with trace hydrocarbons, a global haze layer, and a surface pressure near 10 microbars. Pluto's diverse surface geology and long-term activity raise fundamental questions about how small planets remain active many billions of years after formation. Pluto's large moon Charon displays tectonics and evidence for a heterogeneous crustal composition, its north pole displays puzzling dark terrain. Small satellites Hydra and Nix have higher albedos than expected.

  2. 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)

    1996-08-01

    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.

  3. New black holes of vacuum Einstein equations with hyperscaling violation and Nil geometry horizons

    E-Print Network [OSTI]

    Mokhtar Hassaine

    2015-03-05

    In this paper, we present a new solution of the vacuum Einstein equations in five dimensions which is a static black hole with hyperscaling violation and with a three-dimensional horizon modeled by one the eight Thurston geometries, namely the Nil geometry. This homogeneous geometry is non-trivial in the sense that it is neither of constant curvature nor a product of constant curvature manifolds. Using the Hamiltonian formalism, we identify the mass and entropy of the black hole solution. Curiously enough, in spite of the fact that the entropy turns to be negative, the mass is positive and the first law of thermodynamics holds. We also discuss the extension in higher dimension.

  4. 14] L. De Floriani and P. Magillo, \\Horizon computation on a hierarchical triangulated terrain model", Visual Comput., vol. 11, pp. 134{149, 1995.

    E-Print Network [OSTI]

    Stewart, James

    , \\Shadows for bump-mapped surfaces", in Advanced Computer Graphics (Proceedings of Computer Graphics Tokyo. Hershberger, \\Finding the upper envelope of n line segments in O(nlogn) time", Inform. Process. Lett., vol. 33. The horizon computation can also be used to build horizon maps that are used in conjunction with bump maps

  5. [14] L. De Floriani and P. Magillo, ``Horizon computation on a hierarchical triangulated terrain model'', Visual Comput., vol. 11, pp. 134--149, 1995.

    E-Print Network [OSTI]

    Stewart, James

    . Max, ``Shadows for bump­mapped surfaces'', in Advanced Computer Graphics (Proceedings of Computer, pp. 92--99. [10] J. Hershberger, ``Finding the upper envelope of n line segments in O(n log n) time input to a progressive radiosity algorithm. The horizon computation can also be used to build horizon

  6. Will new horizons see dust clumps in the Edgeworth-Kuiper Belt?

    SciTech Connect (OSTI)

    Vitense, Christian; Krivov, Alexander V.; Löhne, Torsten

    2014-06-01

    Debris disks are thought to be sculptured by neighboring planets. The same is true for the Edgeworth-Kuiper debris disk, yet no direct observational evidence for signatures of giant planets in the Kuiper Belt dust distribution has been found so far. Here we model the dust distribution in the outer solar system to reproduce the dust impact rates onto the dust detector on board the New Horizons spacecraft measured so far and to predict the rates during the Neptune orbit traverse. To this end, we take a realistic distribution of trans-Neptunian objects to launch a sufficient number of dust grains of different sizes and follow their orbits by including radiation pressure, Poynting-Robertson and stellar wind drag, as well as the perturbations of four giant planets. In a subsequent statistical analysis, we calculate number densities and lifetimes of the dust grains in order to simulate a collisional cascade. In contrast to the previous work, our model not only considers collisional elimination of particles but also includes production of finer debris. We find that particles captured in the 3:2 resonance with Neptune build clumps that are not removed by collisions, because the depleting effect of collisions is counteracted by production of smaller fragments. Our model successfully reproduces the dust impact rates measured by New Horizons out to ?23 AU and predicts an increase of the impact rate of about a factor of two or three around the Neptune orbit crossing. This result is robust with respect to the variation of the vaguely known number of dust-producing scattered disk objects, collisional outcomes, and the dust properties.

  7. 1112 IEEE TRANSACTIONS ON ENERGY CONVERSION, VOL. 25, NO. 4, DECEMBER 2010 Short-Horizon Prediction of Wind Power

    E-Print Network [OSTI]

    Kusiak, Andrew

    of Wind Power: A Data-Driven Approach Andrew Kusiak, Member, IEEE, and Zijun Zhang Abstract--This paper discusses short-horizon prediction of wind speed and power using wind turbine data collected at 10 s inter and data-driven models are developed for wind prediction. Power prediction models are estab- lished, which

  8. 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 turbine control system, and shows reductions in both extreme loads and power fluctuations by 80% and 90

  9. 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

  10. 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.

    2013-10-01

    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.

  11. 1. With the sun at the horizon, light goes through more atmosphere to reach us, scattering more of the higher frequency colors out of it, leaving it more red.

    E-Print Network [OSTI]

    Hart, Gus

    1. With the sun at the horizon, light goes through more atmosphere to reach us, scattering more the line between you and the sun. I accepted any position along this arc: i.e. N or S at the horizon

  12. Enhanced Management of Avian Breeding Habitat Injured by Response in the Florida Panhandle, Alabama, and Mississippi

    E-Print Network [OSTI]

    by response activities to the Deepwater Horizon oil spill negatively affected habitat necessary for beach known causes of disturbance to beach nesting habitat. Methods and Results of Offsets Estimation habitat. Photo: Chris Burney, Florida FWC Deepwater Horizon Natural Resource Damage Assessment Trustees

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

    E-Print Network [OSTI]

    National Oceanic and Atmospheric Administration U.S. Department of Commerce NOAA'sOilSpillResponse 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

  14. Will A. Overholt 388 Oakland Ave SE, Atlanta, GA 30312

    E-Print Network [OSTI]

    Storici, Francesca

    sequences for oil-degrading bacterial strains from beach sands impacted by the Deepwater Horizon oil spill in Gulf of Mexico Beach Sands Impacted by the Deepwater Horizon Oil Spill. Applied and Environmental the metabolic potential of indigenous microbial communities with the degradation of oil-hydrocarbons in deep sea

  15. January 3, 2011 18:46 GulfOilSpill010310 International Journal of Bifurcation and Chaos

    E-Print Network [OSTI]

    Bollt, Erik

    be inserted by publisher) On April 20, 2010, an oil well cap explosion below the Deepwater Horizon, an off and summer of 2010 [Aigner et al., 2010]. Following the initial explosion beneath the Deepwater Horizon drilling rig on April 20, 2010, oil continued to spill into the Gulf of Mexico from the resulting fissure

  16. 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?sq=hazen&st=cse&scp=1&pagewanted=print required on American rigs. But the Deepwater Horizon was hardly without safety or premature signal. When a safety switch is thrown, a device cuts the drill pipe, letting it fall

  17. NATURE PHYSICS | VOL 7 | MARCH 2011 | www.nature.com/naturephysics 183 The accusation was made loud and clear

    E-Print Network [OSTI]

    Loss, Daniel

    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 circumvented in the case of Deepwater Horizon. In June 2010, the Department of the Interior (DOI) broke up

  18. The Magazine of Engineering and the Sciences at UC Santa Barbara Light Fantastic

    E-Print Network [OSTI]

    Bigelow, Stephen

    of that work was brought into tragic focus this past summer, when an explosion on the Deepwater Horizon drilling rig led to the largest accidental oil spill in history. For 86 days, oil and gas gushed researchers who were involved in the Deepwater Horizon response.They talk about their experiences at the scene

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

    E-Print Network [OSTI]

    'sOilSpillResponse Assessment and Restoration On April 20, an explosion on the Deepwater Horizon MC252 drilling platform and restoration costs. Potential Impacts of the Deepwater Horizon Spill The oil spill is impacting Louisiana costs. For further information about NOAA's Damage Assessment, Response and Restoration Program, please

  20. INTERSTELLAR PICK-UP IONS OBSERVED BETWEEN 11 AND 22 AU BY NEW HORIZONS

    SciTech Connect (OSTI)

    Randol, B. M.; McComas, D. J.; Schwadron, N. A.

    2013-05-10

    We report new observations by the Solar Wind Around Pluto instrument on the New Horizons spacecraft, which measures energy per charge (E/q) spectra of solar wind and interstellar pick-up ions (PUIs) between 11 AU and 22 AU from the Sun. The data provide an unprecedented look at PUIs as there have been very few measurements of PUIs beyond 10 AU. We analyzed the PUI part of the spectra by comparing them to the classic Vasyliunas and Siscoe PUI model. Our analysis indicates that PUIs are usually well-described by this distribution. We derive parameters relevant to PUI studies, such as the ionization rate normalized to 1 AU. Our result for the average ionization rate between 11 and 12 AU agrees with an independently derived average value found during the same time. Later, we find a general increase in the ionization rate, which is consistent with the increase in solar activity. We also calculate the PUI thermal pressure, which appears to be roughly consistent with previous results. Through fitting of the solar wind proton peaks in our spectra, we derive solar wind thermal pressures. Based on our analysis, we predict a ratio of PUI thermal pressure to solar wind thermal pressure just inside the termination shock to be between 100 and >1000.

  1. OBSERVATIONS OF ISOTROPIC INTERSTELLAR PICK-UP IONS AT 11 AND 17 AU FROM NEW HORIZONS

    SciTech Connect (OSTI)

    Randol, B. M.; McComas, D. J.; Elliott, H. A.; Gosling, J. T.; Schwadron, N. A.

    2012-08-10

    We report new observations by the Solar Wind Around Pluto (SWAP) instrument on the New Horizons spacecraft of an energy-per-charge (E/q) spectrum of interstellar pick-up ions (PUIs) from an unprecedented heliocentric distance of 17 AU. This E/q spectrum is fit well by an isotropic PUI distribution function combined with the detailed response of the SWAP instrument. In contrast to earlier work, we are also able to fit an isotropic PUI model to an E/q spectrum measured by SWAP at 11.3 AU by explicitly including two additional effects. These are (1) the E/q-dependent geometric factor of SWAP, which increases with decreasing E/q owing to effects associated with the post-acceleration of particles exiting the electrostatic analyzer portion of the instrument; and (2) a solar wind distribution, the model spectrum of which contributes significantly to the low-E/q part of the overall model owing, presumably, to secondary particles produced within the instrument.

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

    E-Print Network [OSTI]

    Abdolmaleki, A

    2015-01-01

    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...

  3. 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.

    2013-05-24

    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.

  4. 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)

    2013-06-10

    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.

  5. Exact Coupling Of Event Horizons In Curved Spacetime Heterostructures. Application To Black-Hole Physics

    E-Print Network [OSTI]

    Fredrick Michael

    2010-05-22

    Recently we have discussed the generalized parametrized Klein-Gordon equation for curved spacetime. We have also discussed its derivation from several approaches, the direct Feynman parametrization, the state function entropy or equivalently the information theory approach, and the stochastic differential equation approach. We have even suggested a generalization of the statistics of the entropy to the generalized entropies and derived the particular nonextensive statistics parametrized Klein-Gordon equation, and discussed its nonlinear FPE replacement of the complicated Gibbs-Boltzmann statistics entropy derived analog with complicated nonlinear potential or drift and diffusion coefficients. In this article we apply these previously derived results to the quantum transport in abruptly coupled curved space-time heterostructures, applied here specifically to Black-Hole event horizon coupling to normal curved space-time. We derive the coupling self energy, and the Garcia-Molliner surface Green's functions from which we can calculate the surface area and entropy. We then derive the nonequilibrium transport equations for the radiation from the Black-Hole. We discuss the theory application to Worm Holes and quantum analogues.

  6. 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.

    2013-05-24

    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)more »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.« less

  7. 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.

    1998-01-01

    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...

  8. Geometry of a naked singularity created by standing waves near a Schwarzschild horizon, and its application to the binary black hole problem

    SciTech Connect (OSTI)

    Mandel, Ilya

    2005-10-15

    The most promising way to compute the gravitational waves emitted by binary black holes (BBHs) in their last dozen orbits, where post-Newtonian techniques fail, is a quasistationary approximation introduced by Detweiler and being pursued by Price and others. In this approximation the outgoing gravitational waves at infinity and downgoing gravitational waves at the holes' horizons are replaced by standing waves so as to guarantee that the spacetime has a helical Killing vector field. Because the horizon generators will not, in general, be tidally locked to the holes' orbital motion, the standing waves will destroy the horizons, converting the black holes into naked singularities that resemble black holes down to near the horizon radius. This paper uses a spherically symmetric, scalar-field model problem to explore in detail the following BBH issues: (i) The destruction of a horizon by the standing waves. (ii) The accuracy with which the resulting naked singularity resembles a black hole. (iii) The conversion of the standing-wave spacetime (with a destroyed horizon) into a spacetime with downgoing waves by the addition of a 'radiation-reaction field'. (iv) The accuracy with which the resulting downgoing waves agree with the downgoing waves of a true black-hole spacetime (with horizon). The model problem used to study these issues consists of a Schwarzschild black hole endowed with spherical standing waves of a scalar field, whose wave frequency and near-horizon energy density are chosen to match those of the standing gravitational waves of the BBH quasistationary approximation. It is found that the spacetime metric of the singular, standing-wave spacetime, and its radiation-reaction-field-constructed downgoing waves are quite close to those for a Schwarzschild black hole with downgoing waves--sufficiently close to make the BBH quasistationary approximation look promising for non-tidally-locked black holes.

  9. Solubility of aluminum and silica in Spodic horizons as affected by drying and freezing

    SciTech Connect (OSTI)

    Simonsson, M.; Berggren, D.; Gustafsson, J.P.

    1999-10-01

    The release of toxic Al{sup 3+} is one of the most serious consequences of anthropogenic soil acidification. Therefore, the mechanisms controlling Al solubility have been a topic of intense research for more than a decade. For convenience, soil samples are often dried before storage and experimental use. However, the literature offers examples of drying that results in changes in pH, solubility of organic matter, and dissolution rates of Al. In this study, the authors examined the solubility of Al and Si in fresh soil and in soil that had been dried or deep-frozen. Five Spodosol B horizon soils were subjected to batch titrations, where portions of each soil were equilibrated with solutions with varying concentrations of acid or base added. Extractions with acid oxalate and Na pyrophosphate indicated the presence of imogolite-type materials (ITM) in three of the soils. In the other two soils most secondary solid-phase Al was associated with humic substances. Deep-freezing did not significantly change pH nor the concentration of Al or Si as compared with fresh soil. Drying, on the other hand, yielded pH increases of up to 0.3 units at a given addition of acid or base, whereas Al{sup 3+} changed only slightly, implying a higher Al solubility in all of the soils. Furthermore, dissolved silica increased by up to 200% after drying, except in a soil that almost completely lacked oxalate-extractable Si. The authors suggest that drying enhanced the dissolution of ITM by disrupting soil organic matter, thus exposing formerly coated mineral surfaces. In the soil where dissolved Si did not change with drying, it has been demonstrated that Al-humus complexes controlled Al solubility. They suggest that fissures in the organic material caused by drying may have exposed formerly occluded binding sites that had a higher Al saturation than had sites at the surface of humus particles.

  10. 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

    2002-09-01

    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.

  11. ULTRA-DEEPWATER ADVISORY COMMITTEE

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

    and risk analysis from a human perspective. Training methods such as those used in nuclear submarine and nuclear materials handling in the USN and DOE National labs might be...

  12. ULTRA-DEEPWATER ADVISORY COMMITTEE

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-Sessions | Department of Correctiveof Deliverables UDAC Meeting

  13. 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTIONRobertsdale, Alabama (UtilityInstruments IncMississippi: EnergyS A Industrias de

  14. Hadamard Renormalisation of the Stress Energy Tensor on the Horizons of a Spherically Symmetric Black Hole Space-Time

    E-Print Network [OSTI]

    Cormac Breen; Adrian C. Ottewill

    2012-01-11

    We consider a quantum field which is in a Hartle-Hawking state propagating in a general spherically symmetric black hole space-time. We make use of uniform approximations to the radial equation to calculate the components of the stress tensor, renormalized using the Hadamard form of the Green's function, on the horizons of this space-time. We then specialize these results to the case of the `lukewarm' Reissner-Nordstrom-de Sitter black hole and derive some conditions on the stress tensor for the regularity of the Hartle-Hawking state.

  15. The generalized second law of thermodynamics of the universe bounded by the event horizon and modified gravity theories

    E-Print Network [OSTI]

    Nairwita Mazumder; Subenoy Chakraborty

    2010-05-28

    In this paper, we investigate the validity of the generalized second law of thermodynamics of the universe bounded by the event horizon. Here we consider homogeneous and isotropic model of the universe filled with perfect fluid in one case and in another case holographic model of the universe has been considered. In the third case the matter in the universe is taken in the form of non-interacting two fluid system as holographic dark energy and dust. Here we study the above cases in the Modified gravity, f(R) gravity.

  16. Electroweak Corrections to Photon Scattering, Polarization and Lensing in a Gravitational Background and the Near Horizon Limit

    E-Print Network [OSTI]

    Claudio Coriano; Luigi Delle Rose; Matteo Maria Maglio; Mirko Serino

    2015-01-16

    We investigate the semiclassical approach to the lensing of photons in a spherically symmetric gravitational background, starting from Born level and include in our analysis the radiative corrections obtained from the electroweak theory for the graviton/photon/photon vertex. In this approach, the cross section is related to the angular variation of the impact parameter ($b$), which is then solved for $b$ as a function of the angle of deflection, and measured in horizon units ($b_h\\equiv b/(2 G M)$). Exact numerical solutions for the angular deflection are presented. The numerical analysis shows that perturbation theory in a weak background agrees with the classical Einstein formula for the deflection already at distances of the order of $20$ horizon units ($\\sim 20\\, b_h$) and it is optimal in the description both of very strong and weak lensings. We show that the electroweak corrections to the cross section are sizeable, becoming very significant for high energy gamma rays. Our analysis covers in energy most of the photon spectrum, from the cosmic microwave background up to very high energy gamma rays, and scatterings with any value of the photon impact parameter. We also study the helicity-flip photon amplitude, which is of $O(\\alpha^2)$ in the weak coupling $\\alpha$, and its massless fermion limit, which involves the exchange of a conformal anomaly pole. The corresponding cross section is proportional to the Born level result and brings to a simple renormalization of Einsten's formula.

  17. Some effects of magnetic blowouts on arc interruption 

    E-Print Network [OSTI]

    Benish, Joe

    1949-01-01

    . It is obtained from the approximation that the straight linea of f'igure Z represent current vs. length to the required degree of accuracy. Symbolically, the intercept of the straight line with the y-axis is denoted by Yf, the slope by M. The equation...

  18. Evaluating Aeolian Sand Transport Vectors In Dune Blowouts 

    E-Print Network [OSTI]

    Randolph, Janelle

    2013-02-13

    Grain size distribution is the reflection of the feedback between sediment transport system and morphologic change of beach systems. In this respect, early models suggest that grain size can be used to determine the transport vectors. However...

  19. 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

    2005-04-25

    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.

  20. 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

    2009-04-30

    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.

  1. Imaging the supermassive black hole shadow and jet base of M87 with the event horizon telescope

    SciTech Connect (OSTI)

    Lu, Ru-Sen; Fish, Vincent L.; Doeleman, Sheperd S.; Pankratius, Victor; Broderick, Avery E.; Baron, Fabien; Monnier, John D.

    2014-06-20

    The Event Horizon Telescope (EHT) is a project to assemble a Very Long Baseline Interferometry (VLBI) network of millimeter wavelength dishes that can resolve strong field general relativistic signatures near a supermassive black hole. As planned, the EHT will include enough dishes to enable imaging of the predicted black hole 'shadow', a feature caused by severe light bending at the black hole boundary. The center of M87, a giant elliptical galaxy, presents one of the most interesting EHT targets as it exhibits a relativistic jet, offering the additional possibility of studying jet genesis on Schwarzschild radius scales. Fully relativistic models of the M87 jet that fit all existing observational constraints now allow horizon-scale images to be generated. We perform realistic VLBI simulations of M87 model images to examine the detectability of the black shadow with the EHT, focusing on a sequence of model images with a changing jet mass load radius. When the jet is launched close to the black hole, the shadow is clearly visible both at 230 and 345 GHz. The EHT array with a resolution of 20-30 ?as resolution (?2-4 Schwarzschild radii) is able to image this feature independent of any theoretical models and we show that imaging methods used to process data from optical interferometers are applicable and effective for EHT data sets. We demonstrate that the EHT is also capable of tracing real-time structural changes on a few Schwarzschild radii scales, such as those implicated by very high-energy flaring activity of M87. While inclusion of ALMA in the EHT is critical for shadow imaging, the array is generally robust against loss of a station.

  2. 1566 IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--I: REGULAR PAPERS, VOL. 56, NO. 8, AUGUST 2009 A Low-Power Visual-Horizon Estimation Chip

    E-Print Network [OSTI]

    Horiuchi, Timothy K.

    in the construction of micro aerial vehicles ( 15 cm) have highlighted the lack of real-time sensors for flight environments and cannot give estimates of altitude. For these reasons, real-time detection of the visual horizon may be desir- able for the stabilization of pitch and roll of micro aerial vehi- cles at medium

  3. nh Gi Tn Hi Ti Nguyn Thin Nhin do Trn Du Deep Horizon D n nng cp ng mn vo Khu

    E-Print Network [OSTI]

    tht v dch v gii trí trong vùng t thuc B ni V nm bang vùng Vnh. Sau s c tràn du Deep Horizon, mt lng du và các hot ng i phó u ă làm tn tht các c hi gii trí và làm gim cht lng tri nghim ca du khách n khu

  4. in this issuewe offer commentary on the Iran nuclear negotiations and a Q&A about the New Horizons mission to Pluto (below); the From The Faculty Chair

    E-Print Network [OSTI]

    de Weck, Olivier L.

    in this issuewe offer commentary on the Iran nuclear negotiations and a Q&A about the New Horizons/October 2015 http://web.mit.edu/fnl Massachusetts Institute of Technology continued on page 8 Iran and the P5.S., China, Russia, France,UK,and Germany) and Iran,with respect to non-proliferation of nuclear weapons

  5. Safety, Reliability and Risk Analysis: Beyond the Horizon Steenbergen et al. (Eds) 2014 Taylor & Francis Group, London, ISBN 978-1-138-00123-7

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    properties of the individual components (as wind or solar energy equipment, on-site storage etc.), which may, as well as distributed energy-storage systems (Chen, duan, Cai, Liu, & Hu 2011), (Katiraei & Iravani 20062919 Safety, Reliability and Risk Analysis: Beyond the Horizon ­ Steenbergen et al. (Eds) © 2014

  6. HORIZOnS and OPPORTUNITIES in

    E-Print Network [OSTI]

    Rathbun, Julie A.

    Lunar Science Problems ..........................1 Outlook for Lunar Sample Studies ...........................................30 4 OUTLOOK FOR CURATORIALOPERATIONS ...................31 #12;#12;INTRODUCTION The Moon knowledge about the solar system. Further, the treasures returned through the Apolloprogram provide

  7. Creating the Future Making a Difference

    E-Print Network [OSTI]

    Jawitz, James W.

    erence #UF Research #12;5 Making A Difference New Nerves At the Walter Reed National Military Medical Florida's $9 billion citrus industry. Deepwater Impacts UF environmental scientists are examining oil residue that remains in the Gulf of Mexico years after the Deepwater Horizon oil spill to better

  8. Public Scoping for Preparation of a Programmatic Environmental Impact

    E-Print Network [OSTI]

    are developing a Gulf of Mexico-wide Programmatic Environmental Impact Statement (PEIS) for the Deepwater Horizon0 Public Scoping for Preparation of a Programmatic Environmental Impact Statement for the Deepwater input on the environmental and socioeconomic impacts of implementing restoration that the federal

  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

    YORK TIMES, 11/05/10): Over the weekend BP learned that its latest effort at stanching the Deepwater, many have argued that similar switches should be required on American rigs. But the Deepwater Horizon result in a false alarm or premature signal. When a safety switch is thrown, a device cuts the drill pipe

  10. Page 1 of 1 Statement of

    E-Print Network [OSTI]

    Hickey, Barbara

    a SeagliderTM. Three Seagliders are presently deployed in the Gulf of Mexico around the DeepWater Horizon oil System (IOOS): http://rucool.marine.rutgers.edu/deepwater/. I am also a mechanical engineer, and Chair at that depth are oil drilling and well-head engineers, but they are relative newcomers to this extremes

  11. Research papers Oceanographic conditions in the Gulf of Mexico in July 2010, during the

    E-Print Network [OSTI]

    ) drilling rig at the Macondo MC252 well on April 20, 2010, the northern Gulf of Mexico (GOM) was subjectedResearch papers Oceanographic conditions in the Gulf of Mexico in July 2010, during the Deepwater, while oil was still flowing from the Macondo well following the Deepwater Horizon (DWH) platform

  12. 95AUGUST 2010 Published by the IEEE Computer Society0018-9162/10/$26.00 2010 IEEE

    E-Print Network [OSTI]

    Li, Xin "Shane"

    - operated Deepwater Horizon oil-drilling rig exploded, killing 11 workers and injur- ing 17, and sending on fishing, tourism, and deepwater drilling (banned by the federal gov- ernment in the wake of the spill), and the ultimate cleanup, reclamation, and litigation costs will be in the bil- lions of dollars. In short

  13. Cover photo credits: Clockwise from top left Dave Marci, file photo, file photo, Blair E. Witherington. Background file photo.

    E-Print Network [OSTI]

    #12;Cover photo credits: Clockwise from top left ­ Dave Marci, file photo, file photo, Blair E. Witherington. Background ­ file photo. #12;Deepwater Horizon Oil Spill Phase II Early Restoration Plan

  14. Cover photo credits: Clockwise from top left Dave Marci, file photo, file photo, Blair E. Witherington. Background file photo.

    E-Print Network [OSTI]

    #12;#12;Cover photo credits: Clockwise from top left ­ Dave Marci, file photo, file photo, Blair E. Witherington. Background ­ file photo. #12;Deepwater Horizon Oil Spill Phase II Early Restoration Plan

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

    E-Print Network [OSTI]

    Maas, Natasha

    2013-01-01

    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 ...

  16. International Journal of Control, 2014 Vol. 87, No. 4, 787801, http://dx.doi.org/10.1080/00207179.2013.858829

    E-Print Network [OSTI]

    Ray, Asok

    of the world commu- nity due to its colossal ecological, economic and social impacts. Over 210 million gallons. Introduction The recent Deepwater Horizon oil spill in the Gulf of Mexico has attracted the attention

  17. Impact of Information Loss and Information Error on Network-enabled Decision-making

    E-Print Network [OSTI]

    by the Network Science Collaborative Technology Alliance: No. W911NF08R0013 from the Army Research Lab.................................................................... 2 1.1.2 Scenario Two ­ Deepwater Horizon oil spill (pre

  18. Time Type Abstract # Title Speaker 7:30 -8:30am Breakfast x La Fonda Breakfast Buffet Sponsored by NEB

    E-Print Network [OSTI]

    :40 Speaker 8 FF0039 Optical Mapping Aids Contig Localization and Order: Lessons Learned from Applying Gibbs 9:30 ­ 9:50 Speaker 1 FF0064 Elucidating the Effects of the Deepwater Horizon Oil Spill

  19. Abbreviations: BAL : Brut Arabian Light ; CD1 : Chemically Dispersed oil using dispersant 1 ; CD2 : Chemically Dispersed oil using dispersant 2 ; D1 : Dispersant 1

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    pollution, such as industrial wastewater, tanker51 accidents, and oil leaks from drilling operations (recently Deepwater Horizon) still52 contaminate the marine ecosystem. Even if oil spills do not represent

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

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

    D.C. - The co-chairs of the bipartisan National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling have selected a highly regarded Georgetown University law...

  1. Top Engineers to Investigate Cause of Oil by Lauren Schenkman on July 13, 2010 6:02 PM |

    E-Print Network [OSTI]

    Southern California, University of

    and industry engineers to take a technical look into the causes of the Deepwater Horizon rig explosion and oil is a geoengineer with expertise in drilling fluids. · Rear Admiral Thomas J. Eccles, chief engineer and deputy

  2. Is Corporate Social Responsibility Changing The Way We Do Business? Business Degree Guide: Shifting Trends in the Corporate World

    E-Print Network [OSTI]

    on the BP Deepwater Horizon Oil Spill and Offshore Drilling is a paper that was commissioned by the Obama and professors of business often stress the importance of ethical behavior, as well as the need for social

  3. 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 ...

  4. DRAFT - DO NOT CITE Securing America's Future: Realizing the

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

    April 2010 Deepwater Horizon oil spill, 10 and during the 2014-2015 negotiations with Iran on its nuclear program. 11 The laboratories' purpose extends beyond serving the needs...

  5. A Quantitative Test of the No-Hair Theorem with Sgr A* using stars, pulsars, and the Event Horizon Telescope

    E-Print Network [OSTI]

    Psaltis, Dimitrios; Kramer, Michael

    2015-01-01

    The black hole in the center of the Milky Way, Sgr A*, has the largest mass-to-distance ratio among all known black holes in the Universe. This property makes Sgr A* the optimal target for testing the gravitational no-hair theorem. In the near future, major developments in instrumentation will provide the tools for high-precision studies of its spacetime via observations of relativistic effects in stellar orbits, in the timing of pulsars, and in horizon-scale images of its accretion flow. We explore here the prospect of measuring the properties of the black-hole spacetime using all these three types of observations. We show that the correlated uncertainties in the measurements of the black-hole spin and quadrupole moment using the orbits of stars and pulsars are nearly orthogonal to those obtained from measuring the shape and size of the shadow the black hole casts on the surrounding emission. Combining these three types of observations will, therefore, allow us to assess and quantify systematic biases and un...

  6. Exploring the Gamma Ray Horizon with the next generation of Gamma Ray Telescopes. Part 2: Extracting cosmological parameters from the observation of gamma-ray sources

    E-Print Network [OSTI]

    O. Blanch; M. Martinez

    2004-06-02

    The potential of the new generation Cherenkov Telescopes to measure the energy spectrum of both, the already established extragalactic very high energy gamma-ray emitters and the best very high energy candidates from the EGRET catalogue is discussed. By a realistic simulation of the analysis of the expected extrapolated energy spectra, it is shown that the foreseen capability and precision of these instrument to measure the Gamma Ray Horizon may open the door to competitive measurements of the cosmological parameters.

  7. nh gi Tn hi Ti nguyn Thin nhin do Trn du Deep Horizon Khi phc loi chim ng bin ti vng b bin Alabama

    E-Print Network [OSTI]

    ánh giá Tn hi Tài nguyên Thiên nhiên do Tràn du Deep Horizon Khôi phc loài chim ng bin ti vùng b Alabama s h́nh thành 5 nn làm t ca chim ng dc theo vùng b bin Mobile và Baldwin, Alabama tng c hi làm có th c t́m thy quanh nm ti khu vc b bin Alabama. Chim ng bin ̣i hi nhng khu vc làm t rng răi vi

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

    E-Print Network [OSTI]

    K. Karami; S. Ghaffari

    2010-01-06

    We investigate the validity of the generalized second law in irreversible thermodynamics in a non-flat FRW universe containing the interacting 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 the present time, the generalized second law in nonequilibrium thermodynamics is satisfied for the special range of the energy transfer constants.

  9. Validity of the Generalized Second Law of Thermodynamics of the Universe Bounded by the Event Horizon in Holographic Dark Energy Model

    E-Print Network [OSTI]

    Nairwita Mazumder; Subenoy Chakraborty

    2010-05-19

    In this letter, we investigate the validity of the generalized second law of thermodynamics of the universe bounded by the event horizon in the holographic dark energy model. The universe is chosen to be homogeneous and isotropic and the validity of the first law has been assumed here. The matter in the universe is taken in the form of non-interacting two fluid system- one component is the holographic dark energy model and the other component is in the form of dust.

  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. 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

    2014-01-02

    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.

  12. Receding Horizon Covariance Control 

    E-Print Network [OSTI]

    Wendel, Eric

    2012-10-19

    Covariance assignment theory, introduced in the late 1980s, provided the only means to directly control the steady-state error properties of a linear system subject to Gaussian white noise and parameter uncertainty. This theory, however, does...

  13. 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...

  14. LLNL 1981: technical horizons

    SciTech Connect (OSTI)

    Not Available

    1981-07-01

    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)

  15. 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submitKansasCommunitiesof Energy8) WignerEnergyAbout Us Hanford1MAY99a *

  16. 2011 HM{sub 102}: DISCOVERY OF A HIGH-INCLINATION L5 NEPTUNE TROJAN IN THE SEARCH FOR A POST-PLUTO NEW HORIZONS TARGET

    SciTech Connect (OSTI)

    Parker, Alex H.; Holman, Matthew J.; McLeod, Brian A.; Buie, Marc W.; Borncamp, David M.; Spencer, John R.; Stern, S. Alan; Osip, David J.; Gwyn, Stephen D. J.; Fabbro, Sebastian; Kavelaars, J. J.; Benecchi, Susan D.; Sheppard, Scott S.; Binzel, Richard P.; DeMeo, Francesca E.; Fuentes, Cesar I.; Trilling, David E.; Gay, Pamela L.; Petit, Jean-Marc; Tholen, David J.; and others

    2013-04-15

    We present the discovery of a long-term stable L5 (trailing) Neptune Trojan in data acquired to search for candidate trans-Neptunian objects for the New Horizons spacecraft to fly by during an extended post-Pluto mission. This Neptune Trojan, 2011 HM{sub 102}, has the highest inclination (29. Degree-Sign 4) of any known member of this population. It is intrinsically brighter than any single L5 Jupiter Trojan at H{sub V} {approx} 8.18. We have determined its gri colors (a first for any L5 Neptune Trojan), which we find to be similar to the moderately red colors of the L4 Neptune Trojans, suggesting similar surface properties for members of both Trojan clouds. We also present colors derived from archival data for two L4 Neptune Trojans (2006 RJ{sub 103} and 2007 VL{sub 305}), better refining the overall color distribution of the population. In this document we describe the discovery circumstances, our physical characterization of 2011 HM{sub 102}, and this object's implications for the Neptune Trojan population overall. Finally, we discuss the prospects for detecting 2011 HM{sub 102} from the New Horizons spacecraft during its close approach in mid- to late-2013.

  17. Shell appraising deepwater discovery off Philippines

    SciTech Connect (OSTI)

    Scherer, M. ); Lambers, E.J.T.; Steffens, G.S. )

    1993-05-10

    Shell International Petroleum Co. Ltd. negotiated a farmout in 1990 from Occidental International Exploration and Production Co. for Block SC-38 in the South China Sea off Palawan, Philippines, following Oxy's discovery of gas in 1989 in a Miocene Nido limestone buildup. Under the terms of the farmout agreement, Shell became operator with a 50% share. Following the disappointing well North Iloc 1, Shell was successful in finding oil and gas in Malampaya 1. Water 700-1,000 m deep, remoteness, and adverse weather conditions have imposed major challenges for offshore operations. The paper describes the tectonic setting; the Nido limestone play; the Malampaya discovery; and Shell's appraisal studies.

  18. Deepwater Internal Wave Study and Application 

    E-Print Network [OSTI]

    Jiang, Lei

    2013-12-10

    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...

  19. Deepwater Oil & Gas Resources | Department of Energy

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

    The United States has significant natural gas and oil reserves. But many of these resources are increasingly harder to locate and bring into production. To help meet this...

  20. Deepwater completion and tieback -- A case study

    SciTech Connect (OSTI)

    Ghiselin, D.

    1996-10-01

    Major operators are engaged in large-scale integrated projects around the world. Does integration favor the big boys, or can a small independent operator benefit from this approach? Independent partners Hardy Oil and Gas USA and Samedan Oil Corp. looked into integrated project management to successfully design and install subsea completions, subsea pipelines, and platform tiebacks and interfaces to two platforms operated by Texaco and Chevron, respectively. The paper describes the project management approach taken and results of the project.

  1. 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-Inspired SolarAboutXu Named|Got Solitons?scriptEnv -MediasupercomputersR I N

  2. Deepwater_Response.pdf | 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-in electricLaboratory | version of the1996ofDavidNovember

  3. 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButtePower VenturesInformation9) WindGridDeepi has not created any blogFarm

  4. On the Lack of Type I X-ray Bursts in Black Hole X-ray Binaries: Evidence for the Event Horizon?

    E-Print Network [OSTI]

    Ramesh Narayan; Jeremy S. Heyl

    2002-06-28

    Type I X-ray bursts are very common in neutron star X-ray binaries, but no Type I burst has been seen in the dozen or so binaries in which the accreting compact star is too massive to be a neutron star and therefore is identified as a black hole candidate. We have carried out a global linear stability analysis of the accumulating fuel on the surface of a compact star to identify the conditions under which thermonuclear bursts are triggered. Our analysis, which improves on previous calculations, reproduces the gross observational trends of bursts in neutron star systems. It further shows that, if black hole candidates have surfaces, they would very likely exhibit instabilities similar to those that lead to Type I bursts on neutron stars. The lack of bursts in black hole candidates is thus significant, and indicates that these objects have event horizons. We discuss possible caveats to this conclusion.

  5. Technology on the Horizon & Over the Horizon

    Gasoline and Diesel Fuel Update (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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustments (Billion Cubic Feet) Wyoming963 1.969 1.979 1.988Prices, SalesMoroccoTurkey

  6. Your Horizons Conference April 6

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

    The young women will participate in hands-on activities in such fields as astronomy, robotics, forensics, chemistry, and earth science. Scheduled activities include small- group...

  7. Black hole horizons Eric Gourgoulhon

    E-Print Network [OSTI]

    Gourgoulhon, Eric

    on a black hole: up to 42% of the mass-energy mc2 of accreted matter ! NB: thermonuclear reactions release: a very deep gravitational potential well Release of potential gravitational energy by accretion

  8. An horizon scan of biogeography

    E-Print Network [OSTI]

    2013-01-01

    Database – base? line  data  and  statistics  on  seed  dispersal.   Perspectives  in  Plant Ecology, Evolution and 

  9. An horizon scan of biogeography

    E-Print Network [OSTI]

    2013-01-01

    A.  (2003) The Human Genome  Project: lessons from large?be? ginning  the  human  genome  project,  criteria  were 

  10. Horizon thermodynamics and composite metrics

    E-Print Network [OSTI]

    Lorenzo Sindoni

    2012-11-12

    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.

  11. Multi-horizon stochastic programming

    E-Print Network [OSTI]

    2013-08-26

    Aug 26, 2013 ... Keywords: stochastic programming, multistage, energy planning , scenario tree ..... EnRiMa (Energy Efficiency and Risk Management in Public ...

  12. An horizon scan of biogeography

    E-Print Network [OSTI]

    2013-01-01

    A.  & Petit, R.J.  (2009) Paleoecology meets genet? ics: Paleo* = paleobiology, paleoecology (including also their pa? leobiogeography  and  paleoecology  studies  often  are 

  13. Computational Horizons in Cancer PROCEEDINGS

    E-Print Network [OSTI]

    Maini, Philip K.

    and Electronics Engineers, Inc. All rights reserved. Copyright and Reprint Permission Abstracting is permitted. Dionysiou (IEEE Xplore® Version) E #12;Proceedings of the 2014 6th International Advanced Research Workshop-4 November 2014 Edited by G. S. Stamatakos and D. Dionysiou (IEEE Xplore® Version) ISBN (electronic): 978

  14. Archaeological Horizons in Central California

    E-Print Network [OSTI]

    Heizer, Robert F.; Fenenga, Franklin

    1939-01-01

    1935 A Yokuts Cemetery at Elk Hills. Southwest Museum, The18, 1937. See also the Elk Hills site report (Walker, 1935)

  15. The New Horizons of Bioenergy

    ScienceCinema (OSTI)

    None

    2013-04-19

    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.

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

    E-Print Network [OSTI]

    Benson, Sally M.

    2010-01-01

    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

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

    E-Print Network [OSTI]

    Benson, Sally M.

    2010-01-01

    geologic assessment of oil and gas in the San Joaquin BasinRates in California Oil and Gas District 4 – Update andRates in California Oil and Gas District 4 – Update and

  18. 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

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

    E-Print Network [OSTI]

    Benson, Sally M.

    2010-01-01

    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

  20. American Institute of Aeronautics and Astronautics CHARACTERIZATION OF EXTINCTION EVENTS NEAR BLOWOUT

    E-Print Network [OSTI]

    Seitzman, Jerry M.

    , premixed methane-air combustor. It is found that the flame, which is stabilized above the center body for premixed, prevaporized liquid-fueled combustors. Even for current aeroengine combustors, which operate, e.g., when rapid power changes are required, for both aircraft and land-based turbine engines. Lean

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

    E-Print Network [OSTI]

    Noynaert, Samuel F.

    2005-02-17

    or more of water. While all areas of the oil and gas industry have advanced their ultradeep water technology, one area has had to remain at the forefront: drilling. Unfortunately, while drilling as a whole may be advancing to keep up...

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

    E-Print Network [OSTI]

    Benson, Sally M.

    2010-01-01

    DJ, An appraisal of underground gas storage technologies andaccidents on underground gas storage facilities, Marcogazexperience from the natural gas storage industry. In: Rokke

  3. 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsicloudden DocumentationAccommodationsRegister / Vol. 72, No. 39 1S1!4T opLecturer:

  4. WRITTEN STATEMENT OF DOUGLAS HELTON

    E-Print Network [OSTI]

    the public's coastal natural resources when they are impacted by oil spills, hazardous substance releases) with co-trustees to assess and restore natural resources injured by the oil spill. NRDA also assesses in the response to the Deepwater Horizon BP oil spill and NOAA's ideas for activities to improve future response

  5. How Clark School researchers are developing innovations

    E-Print Network [OSTI]

    Bernstein, Joseph B.

    Provides Insight into Animal Behavior UMD, Children's Consortium Announce Awards for Pediatric Medical,000 deaths, and in that same year, the largest marine oil spill in history took place at Deepwater Horizon, with an estimated 4.9 million barrels of oil dis

  6. Morris R. Flynn, Dept. of Mech. Eng., Univ. of Alberta Sanjay Bhattacharya, Dept. of Mech. Eng., Univ. of Alberta

    E-Print Network [OSTI]

    Flynn, Morris R.

    and filaments are ubiquitous in nature, medical physics and chemical processing · Of interest (e or along the interface between two other fluids · Latter case mimics, say, oil spreading on the surface of the sea (e.g. the Deepwater Horizon oil spill of April, 2010) IGW Photo credits: http

  7. US Department of Commerce National Oceanic and Atmospheric Administration

    E-Print Network [OSTI]

    research and expert commentary that has resulted from the Deepwater Horizon oil spill. It includes peer in this bibliography are sorted into three subject categories: natural, medical, and social sciences. Data sets, fact bibliography on oil spills and oil spill remediation around the world entitled "Resources on Oil Spills

  8. Aquapod: A Small Amphibious Robot with Sampling Capabilities Sandeep Dhull, Dario Canelon, Apostolos Kottas,

    E-Print Network [OSTI]

    Minnesota, University of

    -to-size ratio. I. INTRODUCTION Following the Deepwater Horizon oil spill in the Gulf of Mexico, several methods monitoring scenarios. In this work, the next iteration of the Aquapod is proposed as a method to facilitate collection of subsurface liquid samples in order to assess toxicity levels in a body of water

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

    E-Print Network [OSTI]

    Hubbard, Susan

    RESEARCH ARTICLE Open Access A new model for the biodegradation kinetics of oil droplets: application to the Deepwater Horizon oil spill in the Gulf of Mexico Javier Vilcáez1,2,5 , Li Li1,2,3* and Susan S Hubbard4 Abstract Oil biodegradation by native bacteria is one of the most important natural

  10. Peer Review Plan Date: 10/30/2013

    E-Print Network [OSTI]

    of USGS Wave Scenarios to Assess Potential Submerged Oil Mat (SOM) Formation along the Coast of Florida and Alabama. Subject and Purpose: During the Deepwater Horizon oil spill, oil in the surf zone mixed of this material to the seafloor, sand/oil agglomerates may remain buried at that location. To assist in locating

  11. Researcher warns that current could still bring oil to area

    E-Print Network [OSTI]

    Fernandez, Eduardo

    Researcher warns that current could still bring oil to area September 08, 2010|DAVID DIPINO sludge of the Deepwater Horizon oil spill, Dr. Tamara Frank told a Delray Beach audience that the disaster was "the biggest peacetime oil spill ever" and that local habitats are not yet out of harm's way

  12. An Effective Dispersant for Oil Spills Based on Food-Grade Amphiphiles

    E-Print Network [OSTI]

    Raghavan, Srinivasa

    toxicity and environmental impact of these formulations. In an effort to create a safer dispersant, we have-4 In the case of a large oil spill such as the Deepwater Horizon event in the Gulf of Mexico in 2010, over 2

  13. 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, the worst environmental disaster of its kind in US history Thursday, January 26, 2012 #12;Icelandic volcano, 2010, the largest disruption to European air travel since WWII · Immense local impact to agriculture

  14. Phase IV Proposed Early Restoration Project Alabama Florida Louisiana Mississippi Texas

    E-Print Network [OSTI]

    NOAA · Department of the Interior · U.S. Environmental Protection Agency · U.S. Department that were released during the Deepwater Horizon spill and response. In the Gulf of Mexico, some pelagic fish gear-- which are less likely to impact non-target species. Fishers participating in the repose would

  15. 130 The Journal of Ocean Technology Spindrift Copyright Journal of Ocean Technology 2012 Planning for oil spill response requires identifying key hazards that could cause an incident,

    E-Print Network [OSTI]

    Wright, Dawn Jeannine

    to be deployed. They could then easily share these analyses with stakeholders as part of environmental impact, response, and recovery. During the Deepwater Horizon spill in the Gulf of Mexico, Esri worked closely, a continuously updated environmental sensitivity index map, and electronic navigation charts, as well as links

  16. 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

  17. This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research

    E-Print Network [OSTI]

    Alvarez, Pedro J.

    the bioavailability and bioremediation potential of weathered oil from the Deepwater Horizon oil spill in the Gulf, United States b Center for Water Resource Cycle Research, Korea Institute of Science and Technology bioremediation. " Photocatalytic pre-treatment increased weathered oil solubility and biodegradability. g r a p h

  18. Crude Oil Sorption by Raw Cotton Vinitkumar Singh,

    E-Print Network [OSTI]

    Rock, Chris

    Crude Oil Sorption by Raw Cotton Vinitkumar Singh, Ronald J. Kendall, Kater Hake, and Seshadri: Since the recent Deepwater Horizon Gulf of Mexico oil spill, the need for environmentally friendly oil sorbents has intensified. This study deals with the sorption of crude oil by raw cotton, a biodegradable

  19. Oil Spill Detection and Mapping Along the Gulf of Mexico Coastline Based on Imaging Spectrometer Data 

    E-Print Network [OSTI]

    Arslan, Meryem Damla

    2013-11-27

    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...

  20. Swartz: Oil on the coasts? 'We will never, ever get By SALLY SWARTZ

    E-Print Network [OSTI]

    Fernandez, Eduardo

    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

  1. 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" by government officials overseeing the effort. An estimated 4.9 million barrels of crude and nearly two million

  2. 2010 NPR ANNUAL REPORT ABOUT | 02

    E-Print Network [OSTI]

    Napp, Nils

    including the Upper Big Branch Mine explosion and the Deepwater Horizon oil spill in the Gulf of Mexico drew of the Gulf Oil Spill, NPR News reported that the Obama administration's moratorium to suspend offshore oil of pages of campaign finance reports, lobbying documents, and corporate records had uncovered a quiet

  3. # Title Authors Release of gas phase species from the photolysis of thin

    E-Print Network [OSTI]

    Nizkorodov, Sergey

    Poster # Title Authors 1 Release of gas phase species from the photolysis of thin water films compounds measured in the lower troposphere around the Deepwater Horizon oil spill site (Gulf of Mexico.C., and Wennberg P.O. 9 A field-deployable, chemical ionization time-of-flight mass spectrometer: application

  4. Mathematics of Planet Earth Fred Roberts

    E-Print Network [OSTI]

    that understanding, progress in the mathematical sciences is essential. Dust storm in Mali #12;3 The MPE Challenge storm in Mali Deepwater Horizon Oil Spill #12;4 The MPE Challenge · Need to understand ­ Impact of our sciences provide. Dust storm in Mali #12;5 NSF SEES: Science, Engineering, and Education for Sustainability

  5. Educators' Guide Lessons from the Deep

    E-Print Network [OSTI]

    .the.Gulf.of.Mexico......................................... 15 Suggested.Learning.Procedures.and.Options....... 17 Initial.Lessons.in.the.Lessons1 Educators' Guide Lessons from the Deep: Exploring the Gulf of Mexico's Deep-Sea Ecosystems on the mobile offshore drilling unit Deepwater Horizon about 40 miles southeast of the Louisiana coast

  6. White Paper on the Use of Safety Cases in Certification and Regulation Prof. Nancy Leveson

    E-Print Network [OSTI]

    Leveson, Nancy

    and lessons learned from past accidents. In some industries, practitioners are licensed based Commission (on Deepwater Horizon) and started serving on an advisory committee to the new agency set up what I have learned and my conclusions about the usefulness (and dangers) of this approach

  7. Volume 132, Number 27 Friday, June 8, 2012 MIT's Oldest and

    E-Print Network [OSTI]

    Williams, Brian C.

    of storms SAT: 80°f | 60°f Partly sunny SuN: 82°f | 62°f Mostly sunny dRIll, bAby, dRIll Examining the Deepwater Horizon accident in Run to Failure arts, p. 8 bITTERSWEET CElEbRATION Going to commencement during

  8. Texas Automated Buoy System Sustainable Ocean Observations to Help Protect the Environment

    E-Print Network [OSTI]

    Office Austin, TX Abstract-The Deepwater Horizon oil spill off the coast of Louisiana in 2010 woke the country once again to the inherent risks involved in offshore drilling operations. The final overall cost on drilling platforms, tankers and fueling depots which are designed specifically to prevent the accidental

  9. Highlights 140 Semana 14 18 de junio, 2010

    E-Print Network [OSTI]

    offshore of Louisiana in nearly 5,000 feet of water, BP's Deepwater Horizon exploratory drilling rig.S.'s inability to plan for, control, and clean up an environmental disaster due to deep-sea drilling. (pp. 15 was closing down its operations. After months of drilling, it had reached a reservoir 15,000 feet beneath

  10. Subsurface Trapping of Oil Plumes in Stratification: Laboratory Investigations David Adalsteinsson,1,2,3

    E-Print Network [OSTI]

    Camassa, Roberto

    Subsurface Trapping of Oil Plumes in Stratification: Laboratory Investigations David Adalsteinsson the Deepwater Horizon Gulf oil spill can be trapped as they rise through an ambient, strati ed uid. The addition and theory on trapping/escape of plumes containing an oil/water/surfactant mixture released into nonlinear

  11. U.S. Department of the Interior U.S. Geological Survey

    E-Print Network [OSTI]

    source for science about the Earth, its natural and living resources, natural hazardsU.S. Department of the Interior U.S. Geological Survey Open-File Report 2010­1108 Effects of Building a Sand Barrier Berm to Mitigate the Effects of the Deepwater Horizon Oil Spill on Louisiana

  12. Newsletter for Alumni and Friends Department of

    E-Print Network [OSTI]

    MSU initiative to build an anaerobic digester for waste processing and biogas production, we ...........................................................10-11 #12;2 Department of Physics and Astronomy A Letter from the Chair: Energy and Environment on the issue of energy and the environment. At the very least since the explosion of the Deepwater Horizon oil

  13. Regional distribution of diagenetic carbonate cement in Palaeocene deepwater

    E-Print Network [OSTI]

    Haszeldine, Stuart

    -off) localized above salt tectonics. Isotopic and petrographic evidence indicates that much carbonate C

  14. Epifaunal Assemblages on Deep-water Corals in Roatan, Honduras 

    E-Print Network [OSTI]

    Lavelle, Katherine

    2012-10-30

    = 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= Luna Beach, LWR= Lawson...= Half Moon Bay, LBE= Luna Beach, LWR= Lawson?s Rock, OLS= Old Loafer?s, SDM= Sueno del Mar, SDR= Sueno del Bahia). Figure 4. MDS plot of epifaunal assemblages by depth zone (m). Figure 5. MDS plot of epifaunal assemblages by coral substrate. Figure...

  15. Deep-water subsurface imagingusing OBS interferometry Olivier Carrire1

    E-Print Network [OSTI]

    Gerstoft, Peter

    for detecting and monitoring changes in hydrate distribution and other hydrocarbon related subsurface process used here crosses one of the main normal faults of the mound. The measurement of pressure and particle

  16. The Impact of a Deep-Water Plunging Breaker

    E-Print Network [OSTI]

    Ikeda, Christine; Brucker, Kyle A; Drazen, David A; Dommermuth, Douglas G; Fu, Thomas; Fullerton, Anne M; Duncan, James H

    2014-01-01

    The impact of a plunging breaking wave (wavelength approximately 1.3m) on a rigidly mounted rigid cube structure (dimension 0.31m) that is partially submerged is explored through experiments and numerical calculations. The experiments are carried out in a wave tank and the breaker is generated with a mechanical wave maker using a dispersive focusing technique. The water-surface profile upstream of the front face of the cube and in its vertical centerplane is measured using a cinematic laser-induced fluorescence technique. The three-dimensional flow in the wave tank is simulated directly using the Numerical Flow Analysis (NFA) code. The experiments and the calculations are used to explore the details of the wave-impact process and, in particular, the formation of the high-speed vertical jet that is found on the front face of the cube under some impact conditions.

  17. FE's Ultra-Deepwater Program focuses on spill prevention, safety...

    Office of Environmental Management (EM)

    6, 2014 - 1:44pm Addthis Nearly everyone recognizes that prudent development of domestic oil and natural gas resources will continue to be an important part of U.S. energy strategy...

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

    Energy Savers [EERE]

    designed to benefit consumers by developing technologies to increase America's domestic oil and gas production and reduce the Nation's dependency on foreign imports. Key aspects...

  19. Development of design tool for statically equivalent deepwater mooring systems 

    E-Print Network [OSTI]

    Udoh, Ikpoto Enefiok

    2009-05-15

    mooring systems ........................................ 34 1.20 Spread mooring systems ................................................................. 34 2.1 OTRC wave basin and FPSO model ............................................... 37 2... stiffness curves for the Brazilian FPSO .............................. 58 2.11 Free body diagram of elastic cable connecting points A and B ....... 59 2.12 Static stiffness test...

  20. Experimental and numerical analysis of a deepwater mini-TLP 

    E-Print Network [OSTI]

    Guichard, Aurelien

    2001-01-01

    As the quest for oil and gas resources drives the industry to ever deeper waters, model testing still represents an essential step after numerical modeling when designing offshore platforms in these hostile environments. ...