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


1

SSA Old Black Spruce Site  

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

SSA-OBS) SSA-OBS) View an aerial photo-map of the SSA-OBS site. The 1.3 km road and boardwalk from OBS (facing North) The control box at the base of the flux tower The ARGO ATV used to haul equipment to OBS The double-scaffold flux tower The hut and boardwalk The TE canopy tower Construction during 1993 of the tower site at the Old Black Spruce (SSA-OBS) Trail into SSA-OBS. Large scar and canal created by construction vehicles cutting a new path each visit to avoid being mired in bog. Photograph of construction vehicle in action as it lays the electrical cable into SSA-OBS sites. Tower construction crew working on the foundation for the SSA-OBS tower. Aerial view of double-scaffold flux tower at SSA-OBS site and 100 m cable tramway for transporting the PARABOLA instrument between the flux and Rohn tower.

2

NSA-Old Black Spruce Site  

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

NSA-OBS) NSA-OBS) The NSA-OBS site from the air. This aerial shot of the OBS site shows the generator in the lower-right corner, one of the huts in the upper-left corner, and part of the boardwalk leading away from the hut. View an aerial photo-map of the NSA-OBS site. OBS spruce trees and flux tower The road to the OBS site. The road to the OBS site was often a muddy mess, accessable only by ARGO all-terrain vehicles, and even they got stuck often. The OBS flux tower The NSA black spruce carbon model evaluation site and TE canopy access tower. Oblique view of the trail leading into the NSA Old Black Spruce site. Highway 391 is beyond the image at the bottom and the power line is viewable at the top of the image. The NSA-OBS site would be off to the upper left. The NSA-OBS Rohn tower where Amar Bazzaz of Harvard University is climbing the tower for maintenance.

3

Black Friday Savings All Year 'Round | Department of Energy  

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

Black Friday Savings All Year 'Round Black Friday Savings All Year 'Round Black Friday Savings All Year 'Round November 21, 2011 - 3:58pm Addthis Chris Stewart Senior Communicator at DOE's National Renewable Energy Laboratory On Friday, shoppers across the country will flock to stores and retailers seeking the best bargains of the holiday season. Many will scour newspapers and online coupon sites seeking the deepest discounts and greatest deals. In case you'll be among these millions of consumers, don't forget buying energy efficient products will bring you savings all year 'round. When it comes to shopping for and comparing energy-efficient appliances and home electronics, look for the ENERGY STAR® and EnergyGuide labels. ENERGY STAR labels appear on appliances and home electronics that meet strict

4

Antidepressants' Black-Box Warning — 10 Years Later  

Science Journals Connector (OSTI)

...adolescents, 1.4 million young adults, and 5 million older adults — researchers examined automated health care claims data (for 2000 to 2010) derived from 11 health plans in the U.S. Mental Health Research Network. The study revealed significant reductions in antidepressant use within 2 years after... In 2004, the FDA issued a black-box warning linking antidepressants to an increased risk of suicidal thinking, feeling, and behavior in young people. But some worrisome trends suggest that the warning may inadvertently discourage appropriate treatment of depression.

Friedman R.A.

2014-10-30T23:59:59.000Z

5

Black Engineer of the Year honoree from Sandia inspires youth...  

National Nuclear Security Administration (NNSA)

Media Congressional Testimony Fact Sheets Newsletters Press Releases Video Gallery Photo Gallery Jobs Apply for Our Jobs Our Jobs Working at NNSA Blog Home NNSA Blog Black...

6

Black liquor combustion validated recovery boiler modeling, five-year report  

SciTech Connect (OSTI)

The objective of this project was to develop a new computer model of a recovery boiler furnace using a computational fluid dynamics (CFD) code specifically tailored to the requirements for solving recovery boiler flows, and using improved submodels for black liquor combustion based on continued laboratory fundamental studies. The project originated in October 1990 and was scheduled to run for four years. At that time, there was considerable emphasis on developing accurate predictions of the physical carryover of macroscopic particles of partially burnt black liquor and smelt droplets out of the furnace, since this was seen as the main cause of boiler plugging. This placed a major emphasis on gas flow patterns within the furnace and on the mass loss rates and swelling and shrinking rates of burning black liquor drops. As work proceeded on developing the recovery boiler furnace model, it became apparent that some recovery boilers encounter serious plugging problems even when physical carryover was minimal. After the original four-year period was completed, the project was extended to address this issue. The objective of the extended project was to improve the utility of the models by including the black liquor chemistry relevant to air emissions predictions and aerosol formation, and by developing the knowledge base and computational tools to relate furnace model outputs to fouling and plugging of the convective sections of the boilers. The work done to date includes CFD model development and validation, acquisition of information on black liquor combustion fundamentals and development of improved burning models, char bed model development, and model application and simplification.

Grace, T.M.; Frederick, W.J.; Salcudean, M.; Wessel, R.A.

1996-08-01T23:59:59.000Z

7

Spruce Mountain | Open Energy Information  

Open Energy Info (EERE)

Mountain Mountain Jump to: navigation, search Name Spruce Mountain Facility Spruce Mountain Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Patriot Renewables Developer Patriot Renewables Energy Purchaser Energy New England Location Bryant Pond ME Coordinates 44.43443869°, -70.55286884° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":44.43443869,"lon":-70.55286884,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

8

fire & fuels management Spruce Beetle-Induced Changes to Engelmann  

E-Print Network [OSTI]

. Keywords: crown fire, bark beetles, heat of combustion, fire behavior, time to ignition E ngelmann spruce

9

The university college center and the freshman year experience: a case study at a selected historically black university in Texas  

E-Print Network [OSTI]

i THE UNIVERSITY COLLEGE CENTER AND THE FRESHMAN YEAR EXPERIENCE: A CASE STUDY AT A HISTORICALLY BLACK UNIVERSITY IN TEXAS A Dissertation by CARLA ANNE GARRETT Submitted to the Office of Graduate Studies of Texas A... CASE STUDY AT A HISTORICALLY BLACK UNIVERSITY IN TEXAS A Dissertation by CARLA ANNE GARRETT Submitted to Texas A&M University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Approved as to style...

Garrett, Carla Anne

2005-08-29T23:59:59.000Z

10

Spruce Forests (Norway and Sitka Spruce, Including Douglas Fir): Carbon and Water Fluxes and Balances, Ecological and Ecophysiological Determinants  

Science Journals Connector (OSTI)

Natural forests with a high percentage of spruce will be found in Europe only in subalpine and alpine regions or in the boreal forests of Scandinavia and Russia. Nevertheless, spruce belongs to the most import...

C. Bernhofer; M. Aubinet; R. Clement…

2003-01-01T23:59:59.000Z

11

Economics of planting improved Sitka spruce -Seed Orchard and VP  

E-Print Network [OSTI]

Economics of planting improved Sitka spruce - Seed Orchard and VP Steve Lee and Guy Watt Forest Research, and John Clegg and associates. #12;6th November 20082 Economics of Sitka spruce www 20083 Economics of Sitka spruce www.forestresearch.gov.uk Background · Different sources of improved SS

12

Blue Spruce Farm Ana Biomass Facility | Open Energy Information  

Open Energy Info (EERE)

Spruce Farm Ana Biomass Facility Spruce Farm Ana Biomass Facility Jump to: navigation, search Name Blue Spruce Farm Ana Biomass Facility Facility Blue Spruce Farm Ana Sector Biomass Location Vermont Coordinates 44.5588028°, -72.5778415° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":44.5588028,"lon":-72.5778415,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

13

A dendroecological reconstruction of western spruce budworm outbreaks (Choristoneura occidentalis) in the Front Range, Colorado, from 1720 to 1986  

Science Journals Connector (OSTI)

Radial increment cores from Douglas-fir (Pseudotsuga menziesii) and blue spruce (Picea pungens), defoliated by western spruce budworm (Choristoneura occidentalis), were analyzed by means of dendrochronological me...

Urs M. Weber; Fritz H. Schweingruber

1995-04-01T23:59:59.000Z

14

YEAR  

National Nuclear Security Administration (NNSA)

96 YEAR 2013 Males 69 Females 27 YEAR 2013 SES 1 EJEK 9 EN 04 27 NN (Engineering) 26 NQ (ProfTechAdmin) 30 NU (TechAdmin Support) 3 YEAR 2013 American Indian Alaska Native Male...

15

A delayed effect of ozone fumigation on photosynthesis of Norway spruce  

E-Print Network [OSTI]

A delayed effect of ozone fumigation on photosynthesis of Norway spruce D. Eamus1 A.W. Davis J into the long-lastincl effects of ozone fumiga- tion upon photosynthesis of Norway spruce. Measurements were

Paris-Sud XI, Université de

16

YEAR  

National Nuclear Security Administration (NNSA)

2540 YEAR 2013 Males 1677 Females 863 YEAR 2013 SES 102 EX 3 SL 1 EJEK 89 EN 05 41 EN 04 170 EN 03 18 NN (Engineering) 448 NQ (ProfTechAdmin) 1249 NU (TechAdmin Support) 76 NV...

17

YEAR  

National Nuclear Security Administration (NNSA)

1 1 YEAR 2011 Males 18 Females 23 YEAR 2011 SES 2 EJ/EK 2 NQ (Prof/Tech/Admin) 35 NU (Tech/Admin Support) 2 YEAR 2011 American Indian Male 1 American Indian Female 2 African American Male 3 African American Female 9 Asian Male 0 Asian Female 0 Hispanic Male 2 Hispanic Female 6 White Male 12 White Female 6 DIVERSITY Workforce Diversity Associate Administrator for Information Management & Chief Information Officer, NA-IM As of Sep 24, 2011 PAY PLAN TOTAL WORKFORCE GENDER 18 43.9% 23 56.1% Gender Males Females 4.9% 4.9% 85.4% 4.9% Pay Plan SES EJ/EK NQ (Prof/Tech/Admin) NU (Tech/Admin Support) 2.4% 4.9% 7.3% 22.0% 0.0% 0.0% 4.9% 14.6% 29.3% 14.6% Race and Gender American Indian Male American Indian Female African American Male African American Female Asian Male Asian Female Hispanic Male

18

YEAR  

National Nuclear Security Administration (NNSA)

4 4 YEAR 2011 Males 21 Females 23 YEAR 2011 SES 3 EJ/EK 1 EN 03 1 NN (Engineering) 3 NQ (Prof/Tech/Admin) 31 NU (Tech/Admin Support) 5 YEAR 2011 American Indian Male 0 American Indian Female 0 African American Male 1 African American Female 2 Asian Male 1 Asian Female 1 Hispanic Male 6 Hispanic Female 10 White Male 13 White Female 10 DIVERSITY Workforce Diversity Office of General Counsel, NA-GC As of Sep 24, 2011 PAY PLAN TOTAL WORKFORCE GENDER 21 47.7% 23 52.3% Gender Males Females 6.8% 2.3% 2.3% 6.8% 70.5% 11.4% Pay Plan SES EJ/EK EN 03 NN (Engineering) NQ (Prof/Tech/Admin) NU (Tech/Admin Support) 0.0% 0.0% 2.3% 4.5% 2.3% 2.3% 13.6% 22.7% 29.5% 22.7% Race and Gender American Indian Male American Indian Female African American Male African American Female Asian Male Asian Female Hispanic Male

19

YEAR  

National Nuclear Security Administration (NNSA)

6 6 YEAR 2011 Males 7 Females 9 YEAR 2011 SES 1 NQ (Prof/Tech/Admin) 9 GS 15 2 GS 13 2 GS 12 1 GS 11 1 YEAR 2011 American Indian Male 0 American Indian Female 0 African American Male 1 African American Female 3 Asian Male 1 Asian Female 0 Hispanic Male 1 Hispanic Female 0 White Male 4 White Female 6 DIVERSITY Workforce Diversity Associate Administrator of External Affairs, NA-EA As of Sep 24, 2011 PAY PLAN TOTAL WORKFORCE GENDER 7 43.8% 9 56.3% Gender Males Females 6.3% 56.3% 12.5% 12.5% 6.3% 6.3% Pay Plan SES NQ (Prof/Tech/Admin) GS 15 GS 13 GS 12 GS 11 0.0% 0.0% 6.3% 18.8% 6.3% 0.0% 6.3% 0.0% 25.0% 37.5% Race and Gender American Indian Male American Indian Female African American Male African American Female Asian Male Asian Female Hispanic Male Hispanic Female White Male White Female FY11 Workforce Diversity

20

YEAR  

National Nuclear Security Administration (NNSA)

40 40 YEAR 2011 Males 68 Females 72 YEAR 2011 SES 5 EJ/EK 1 NN (Engineering) 16 NQ (Prof/Tech/Admin) 115 NU (Tech/Admin Support) 3 YEAR 2011 American Indian Male 1 American Indian Female 2 African American Male 3 African American Female 7 Asian Male 4 Asian Female 0 Hispanic Male 25 Hispanic Female 26 White Male 35 White Female 37 DIVERSITY Workforce Diversity Associate Administrator for Acquistion & Project Management, NA-APM As of Sep 24, 2011 PAY PLAN TOTAL WORKFORCE GENDER 68 48.6% 72 51.4% Gender Males Females 3.6% 0.7% 11.4% 82.1% 2.1% Pay Plan SES EJ/EK NN (Engineering) NQ (Prof/Tech/Admin) NU (Tech/Admin Support) 0.7% 1.4% 2.1% 5.0% 2.9% 0.0% 17.9% 18.6% 25.0% 26.4% Race and Gender American Indian Male American Indian Female African American Male African American Female Asian Male

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


21

Years  

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

and Technology in and Technology in the National Interest 60 Years of Excellence Lawrence Livermore National Laboratory FY 2012 Annual Report About the Cover: Lawrence Livermore National Laboratory (LLNL) engineers Chris Spadaccini (left) and Eric Duoss are shown experimenting with direct ink-writing to create micro- to macroscale structures with extreme precision. The Laboratory is advancing this process and other additive manufacturing technologies to develop new materials with extraordinary properties for use in a wide range of national-security and other applications. About the Laboratory: Lawrence Livermore National Laboratory was founded in 1952 to enhance the security of the United States by advancing nuclear weapons science and technology. With a talented and dedicated workforce and

22

E-Print Network 3.0 - appalachian spruce fir Sample Search Results  

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

topography, and potential insolation on the Summary: United States (Noss et al. 1995; White and Miller 1998). Appalachian montane spruce-fir forests... by wind, with natural...

23

Wood energy fuel cycle optimization in beech and spruce forests  

Science Journals Connector (OSTI)

A novel synergistic approach to reducing emissions from residential wood combustion (RWC) is presented. Wood energy fuel cycle optimization (FCO) aims to provide cleaner burning fuels through optimization of forestry and renewable energy management practices. In this work, beech and spruce forests of average and high quality were modelled and analysed to determine the volume of fuel wood and its associated bark fraction produced during typical forestry cycles. Two separate fuel wood bark production regimes were observed for beech trees, while only one production regime was observed for spruce. The single tree and stand models were combined with existing thinning parameters to replicate existing management practices. Utilizing estimates of initial seedling numbers and existing thinning patterns a dynamic model was formed that responded to changes in thinning practices. By varying the thinning parameters, this model enabled optimization of the forestry practices for the reduction of bark impurities in the fuel wood supply chain. Beech forestry cycles responded well to fuel cycle optimization with volume reductions of bark from fuel wood of between ~10% and ~20% for average and high quality forest stands. Spruce, on the other hand, was fairly insensitive to FCO with bark reductions of 0–5%. The responsiveness of beech to FCO further supports its status as the preferred RWC fuel in Switzerland. FCO could easily be extended beyond Switzerland and applied across continental Europe and North America.

Nickolas K Meyer; Marco Mina

2012-01-01T23:59:59.000Z

24

Decomposition and nitrogen dynamics of fine roots of Norway spruce (Picea abies (L.) Karst) at different sites  

Science Journals Connector (OSTI)

Long-term decomposition and nitrogen dynamics of Norway spruce finest (energy content and nitrogen concentration was determined. After...

Krista Lõhmus; Mari Ivask

1995-01-01T23:59:59.000Z

25

Decomposition and nitrogen dynamics of fine roots of Norway spruce (Picea abies (L.) Karst.) at different sites  

Science Journals Connector (OSTI)

Long-term decomposition and nitrogen dynamics of Norway spruce finest (energy content and nitrogen concentration was determined. After...

Krista Lõhmus; Mari Ivask

26

Mercury and Sulfur Dynamics in the SPRUCE Experiment Brandy Toner1  

E-Print Network [OSTI]

Mercury and Sulfur Dynamics in the SPRUCE Experiment Brandy Toner1 , Randy Kolka2 , Steve Sebestyen will lead studies assessing the influence of SPRUCE treatments on the cycling of THg, MeHg and S. Mercury. Mercury levels are determined by complex interactions between deposition, chemical transformation

27

Density effects on the conifer mortality in declining spruce-fir forest in northern Japan: Implication of bark beetle attack to, cause spruce decline  

Science Journals Connector (OSTI)

We examined mortality patterns of two conifer species in relation to tree abundance and species composition in a declining spruce-fir forest in Akan National park, Hokkaido, northern...Picea jezoensis (Sieb. et Z...

Kenichi Ozaki; Kenji Fukuyama; Kaoru Maetô; Kensuke Itoh

1998-11-01T23:59:59.000Z

28

Similarity of nutrient uptake and root dimensions of Engelmann spruce and subalpine fir at two contrasting sites in Colorado  

SciTech Connect (OSTI)

Nutrient uptake capacity is an important parameter in modeling nutrient uptake by plants. Researchers commonly assume that uptake capacity measured for a species can be used across sites. We tested this assumption by measuring the nutrient uptake capacity of intact roots of Engelmann spruce (Picea engelmanni Parry) and subalpine fir (Abies lasiocarpa (Hook.) Nutt.) at Loch Vale Watershed and Fraser Experimental Forest in the Rocky Mountains of central Colorado. Roots still attached to the tree were exposed to one of three concentrations of nutrient solutions for time periods ranging from 1 to 96 hours, and solutions were analyzed for ammonium, nitrate, calcium, magnesium, and potassium. Surprisingly, the two species were indistinguishable in nutrient uptake within site for all nutrients (P > 0.25), but uptake rates differed by site. In general, nutrient uptake was higher at Fraser (P = 0.01, 0.15, 0.03, 0.18 for NH{sub 4}{sup +}, NO{sub 3}{sup -}, Ca{sup 2+}, and K{sup +}, respectively), which is west of the Continental Divide and has lower atmospheric deposition of N than Loch Vale. Mean uptake rates by site for ambient solution concentrations were 0.12 {micro}mol NH{sub 4}{sup +} g{sub fwt}{sup -1} h{sup -1}, 0.02 {micro}mol NO{sub 3}{sup -} g{sub fwt}{sup -1}, 0.21 {micro}mol Ca{sup 2+} g{sub fwt}{sup -1} h{sup -1}, and 0.01 {micro}mol Mg{sup 2+} g{sub fwt}{sup -1} h{sup -1} at Loch Vale, and 0.21 {micro}mol NH{sub 4}{sup +} f{sub fwt}{sup -1}h{sup -1}, 0.04 {micro}mol NO{sub 3}{sup -} g{sub fwt}{sup -1} h{sup -1}, 0.51 {micro}mol Ca{sup 2+}g{sub fwt}{sup -1}h{sup -1}, and 0.07 {micro}mol Mg{sup 2+} f{sub fwt}{sup -1}h{sup -1} at Fraser. The importance of site conditions in determining uptake capacity should not be overlooked when parameterizing nutrient uptake models. We also characterized the root morphology of these two species and compared them to other tree species we have measured at various sites in the northeastern USA. Engelman spruce and subalpine fir were indistinguishable in specific root length and diameter distribution, while most of the other ten species had statistically distinct diameter distributions across five diameter classes < 2 mm. Based on specific root length, subalpine fir and Engelmann spruce had significantly coarser roots than red pine (Pinus resinosa Soland), yellow birch (Betula allegheniensis Britt.), sugar maple (Acer saccharum Marsh.), chestnut oak (Quercus prinus L.), black cherry (Prunus serotina Ehrh.), and red spruce (Picea rubens Sarg.). White oak (Quercus alba L.), balsam fir (Abies balsamea (L.) Mill.), American beech (Fagus grandifolia Ehrh.) and loblolly pine (Pinus taeda L.) were intermediate in SRL (indistinguishable from Engelmann spruce and subalpine fir by ANOVA). Species that differ more in physiology and morphology than the two species we compared would likely show dissimilar uptake characteristics even at the same site.

Yanai, R; McFarlane, K; Lucash, M; Kulpa, S; Wood, D

2009-10-09T23:59:59.000Z

29

A star in a 15.2-year orbit around the supermassive black hole at the centre of the Milky Way  

Science Journals Connector (OSTI)

... in April/May 2002 thus probes the mass concentration at around 2,100 times the Schwarzschild radius of a 3 × 106M black hole. The pericentre distance radius of S2 ... because such a configuration would have a radius only a few times greater than the Schwarzschild radius of a black hole. However, it would be very hard to understand how ...

R. Schödel; T. Ott; R. Genzel; R. Hofmann; M. Lehnert; A. Eckart; N. Mouawad; T. Alexander; M. J. Reid; R. Lenzen; M. Hartung; F. Lacombe; D. Rouan; E. Gendron; G. Rousset; A.-M. Lagrange; W. Brandner; N. Ageorges; C. Lidman; A. F. M. Moorwood; J. Spyromilio; N. Hubin; K. M. Menten

2002-10-17T23:59:59.000Z

30

E-Print Network 3.0 - appalachian spruce-fir forest Sample Search...  

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

HardwoodsSpruce-Fir Open Upland Brush Lowland Brush UrbanBare Rock CedarMixed Conifer 12;... Ford Forestry Center and Research Forest Historical Stand Cover (c. 1956)...

31

A 700 year sediment record of black carbon and polycyclic aromatic hydrocarbons near the EMEP air monitoring station in Aspvreten, Sweden  

SciTech Connect (OSTI)

In view of poor constraints on historical combustion emissions, past environmental loadings of black carbon (BC) and polycyclic aromatic hydrocarbon (PAH) were reconstructed from dated lake sediment cores collected 70 km south of Stockholm, Sweden. Compared to several dramatic variations over the recent 150 years, the preindustrial loadings were steady within {+-}50% through the entire medieval with BC fluxes of 0.071 g m{sup -2} yr{sup -1} and PAH fluxes of 6 g m{sup -2} yr{sup -1}. In the wood-burning dominated century leading up to the industrial revolution around 1850, increasing BC fluxes were leading PAH fluxes. BC fluxes reached their millennial-scale maximum around 1920, whereas PAH fluxes increased exponentially to its record maximum around 1960, 50-fold above preindustrial values. For 1920-1950, BC fluxes consistently decreased as PAH fluxes kept increasing. Coal and coke represented >50% of the Swedish energy market in the 1930s. Combined with sharply decreasing (1,7-)/(1,7{+-}2,6-dimethylphenanthrene), indicative of diminishing wood combustion, and decreasing methylphenanthrenes/phenanthrene, indicative of higher-temperature combustion (coal instead of wood), the sediment archive suggests that the relative BC/PAH emission factors thus are lower for coal than for wood combustion. For the first time, both BC and PAH fluxes decreased after 1960. This trend break is a testament to the positive effects of decreasing reliance on petroleum fuels and a number of legislative actions aimed at curbing emissions and by 1990, the loading of BC was back at preindustrial levels, whereas that of PAH were the lowest since the 1910s. However, for the most recent period (1990-2004) the BC and PAH fluxes are no longer decreasing. 55 refs., 3 figs.

Marie Elmquist; Zdenek Zencak; Oerjan Gustafsson [Stockholm University, Stockholm (Sweden). Department of Applied Environmental Science

2007-10-15T23:59:59.000Z

32

Black liquor combustion validated recovery boiler modeling: Final year report. Volume 1 (Main text and Appendix I, sections 1--4)  

SciTech Connect (OSTI)

This project was initiated in October 1990, with the objective of developing and validating a new computer model of a recovery boiler furnace using a computational fluid dynamics (CFD) code specifically tailored to the requirements for solving recovery boiler flows, and using improved submodels for black liquor combustion based on continued laboratory fundamental studies. The key tasks to be accomplished were as follows: (1) Complete the development of enhanced furnace models that have the capability to accurately predict carryover, emissions behavior, dust concentrations, gas temperatures, and wall heat fluxes. (2) Validate the enhanced furnace models, so that users can have confidence in the predicted results. (3) Obtain fundamental information on aerosol formation, deposition, and hardening so as to develop the knowledge base needed to relate furnace model outputs to plugging and fouling in the convective sections of the boiler. (4) Facilitate the transfer of codes, black liquid submodels, and fundamental knowledge to the US kraft pulp industry. Volume 1 contains the main body of the report and the first 4 sections of Appendix 1: Modeling of black liquor recovery boilers -- summary report; Flow and heat transfer modeling in the upper furnace of a kraft recovery boiler; Numerical simulation of black liquor combustion; and Investigation of turbulence models and prediction of swirling flows for kraft recovery furnaces.

Grace, T.M.; Frederick, W.J.; Salcudean, M.; Wessel, R.A.

1998-08-01T23:59:59.000Z

33

Effects of acidic deposition on nutrient uptake, nutrient cycling and growth processes of vegetation in the spruce-fir ecosystem  

SciTech Connect (OSTI)

This report summarizes progress in three years of field research designed to evaluate biological and chemical indicators of the current and future health of the Southern Appalachian spruce-fir ecosystem. The emphasis of this research has been on the identification and understanding of mechanisms through which current levels of acidic deposition are impacting ecosystem processes. The identification of these principal mechanisms and key biological indicators of change was designed to improve our capabilities to detect, monitor, and assess the effects of air quality regulations and attendant future air quality changes on ecosystem response. Individual research tasks focused on the following research areas: (1) the significance of foliar uptake of atmospheric sources of nitrogen in relationship to plant utilization of N from available soil reserves; (2) linkages between atmospheric inputs to the soil surface, solution chemistry, and decomposition in the upper organic soil horizons; (3) effects of soil solution chemistry on uptake of cations and aluminum by fine roots; and (4) the effects of varying rates of calcium supply on carbon metabolism of Fraser fir and red spruce, and the relationship between calcium levels in wood cells and integrity of wood formed in bole and branches. Each of the individual tasks was designed to focus upon a mechanism or process that we consider critical to understanding chemical and biological linkages. These linkages will be important determinants in understanding the basis of past and potential future responses of the high elevation Southern Appalachian Forest to acidic deposition and other co-occurring environmental stresses. This report contains (1) background and rationale for the research undertaken in 1992-94; (2) a summary of principal research findings; (3) publications from this research; and (4) characterization of data sets produced by this research which will be the basis of future research, analyses and/or publications.

McLaughlin, S.B.; Garten, C.T.; Wullschleger, S.D. [Oak Ridge National Lab., TN (United States)] [and others

1996-10-16T23:59:59.000Z

34

Substrate Aeration Properties and Growth of Containerized White Spruce: A Case Study  

Science Journals Connector (OSTI)

...overcome competing vegetation on plantation sites (Fortier, 2008...diameter growth, height, and dry biomass for 1-yr-old white spruce...growth, root and shoot dry biomass, nutrient content) and the...being held within sphagnum and wood cells composing organic matter...

Simon Boudreault; Steeve Pepin; Jean Caron; Mohammed S. Lamhamedi; Ian Paiement

35

Effects of wood chip ash fertilization on soil chemistry in a Norway spruce plantation on a nutrient-poor soil  

Science Journals Connector (OSTI)

Abstract Harvest of forest biomass for energy production may lead to export of nutrients from the forest. Recirculation of nutrients from wood chip combustion by ash spreading in forests has been proposed as a means for counteracting the nutrient export. This study was carried out to examine the effect of wood chip ash application on soil chemistry in a 44-year-old Norway spruce (Picea abies) plantation on a nutrient-poor soil in Denmark and to investigate the effect of applying different ash types and doses. Soil samples were collected and analyzed 2.5 years (3 growing seasons) after ash application. This study shows that, regardless of ash formulation, preparation or dose, application of wood ash to forest soil has a liming effect in the O-horizon manifested as an increase in CECe, BS and pH. This effect was not seen in the mineral soil within the time frame of this study. At the same time, an increase in Cd was found in the O-horizon, corresponding to the amount added in the ashes. Generally, no other increase in soil contents of the heavy metals was seen. Hardening of the wood ash did not decrease the chemical impact on the soil chemistry as compared to non-treated ash whereas an increase in ash application dose increases the liming effect.

Morten Ingerslev; Mette Hansen; Lars Bo Pedersen; Simon Skov

2014-01-01T23:59:59.000Z

36

Climate change effects on red spruce decline mitigated by reduction in air pollution within its shrinking habitat range  

Science Journals Connector (OSTI)

Abstract We investigated the potential effects of projected climate change on red spruce (Picea rubens Sarg.) growth in the Great Smoky Mountains of Southeastern USA. A model called Annual Radial Increment Model (ARIM) was used to capture ecosystem complexity manifested as direct and indirect effects in multifactorial within- and across-scale interactions. The model was run under different scenarios, including projected climate change under reduced, no change, and increased atmospheric pollution. Modeled red spruce growth at end of 21st century (2080–2099) was compared to modeled growth at end of the 20th century (1980–1999). Red spruce growth at high elevations (?1700 m) declined by 10.8% when climate change interacted with a 10% increase in air pollution, but red spruce growth increased by 8.4% when air pollution decreased by 10%. In contrast, red spruce growth at low elevations (air pollution, 8.9% with no change, and 6.4% with a 10% decrease in air pollution. Our results suggest that red spruce populations at high-elevation may grow more rapidly under climate change if air pollution decreases, but populations at low-elevation may decline irrespective of air pollution changes as habitats shrink.

Kyung Ah Koo; Bernard C. Patten; Robert O. Teskey; Irena F. Creed

2014-01-01T23:59:59.000Z

37

Variation in wood anatomical structure of Douglas-fir defoliated by the western spruce budworm: a case study in the coastal-transitional zone of British Columbia, Canada  

Science Journals Connector (OSTI)

An outbreak of the western spruce budworm temporarily modifies cellular wood anatomy of stem wood in natural and mature Douglas-fir stands impacting wood quality properties.

J. N. Axelson; A. Bast; R. Alfaro; D. J. Smith; H. Gärtner

2014-12-01T23:59:59.000Z

38

Water and energy exchange above a mixed European Beech – Norway Spruce forest canopy: a comparison of eddy covariance against soil water depletion measurement  

Science Journals Connector (OSTI)

Evapotranspiration of a mixed European beech – Norway spruce forest was measured by means of ... the results by (1) the degree of energy balance closure (EBC), (2) footprint...

H. Schume; H. Hager; G. Jost

2005-06-01T23:59:59.000Z

39

Please cite this article in press as: Hart, S.J., Laroque, C.P., Searching for thresholds in climateradial growth rela-tionships of Engelmann spruce and subalpine fir, Jasper National Park, Alberta, Canada. Dendrochronologia (2012),  

E-Print Network [OSTI]

in climate­radial growth rela- tionships of Engelmann spruce and subalpine fir, Jasper National Park, Alberta for thresholds in climate­radial growth relationships of Engelmann spruce and subalpine fir, Jasper National Park

Walters, Bradley B.

40

Protection of spruce from colonization by the bark beetle, Ips perturbatus, in Alaska  

Science Journals Connector (OSTI)

Field bioassays were conducted in south-central Alaska in a stand of Lutz spruce, Picea × lutzii, to determine whether a semiochemical interruptant (verbenone and trans-conophthorin) and/or a defense-inducing plant hormone (methyl jasmonate, MJ) could be used to protect individual standing trees from bark beetle attack. During two experiments (initiated in May 2004 and 2005, respectively), attacks by Ips perturbatus on standing trees were induced by using a three-component aggregation pheromone (ipsenol, cis-verbenol, and ipsdienol) and prevented by using the interruptant. In 2005, treatments from 2004 were repeated and additional treatments were evaluated by using MJ spray or injection with and without the interruptant. Aggregation began before 3 or 7 June, and attack density was monitored through 3 or 16 August. During both years, tree mortality caused by I. perturbatus was recorded twice (in August, and in May of the following year). In both experiments, attack density was greatest on trees baited with the three-component attractive pheromone, but was significantly reduced by addition of the semiochemical interruptant to trees baited with the attractant. There were no significant differences in attack density between attractant + interruptant-treated trees and unbaited trees. In 2004, mortality was highest among attractant-baited trees, whereas addition of the interruptant significantly reduced the level of initial (10 week post-treatment) and final (54 week post-treatment) mortality. In 2005, no significant reduction in attack density occurred on trees baited with the attractant when MJ was sprayed or injected. The highest initial (10.6 week post-treatment) and final (49.4 week post-treatment) mortality was observed among trees that had been injected with MJ and baited with the attractant. Mortality at the final assessment was significantly lower in all other treatment groups. As in 2004, addition of the interruptant to attractant-baited trees significantly reduced the level of final mortality compared to attractant-baited trees. MJ was not attractive or interruptive to I. perturbatus or associated bark beetles in a flight trapping study. However, MJ-treated trees (sprayed or injected) exuded copious amounts of resin on the bark surface. Anatomical analyses of felled trees from four treatment groups [Tween (solvent)-sprayed, MJ-sprayed, Tween-injected, and MJ-injected + attractant baited] showed that treatment with MJ increased the number and size of resin ducts produced following treatment. These analyses also revealed a reduction in radial growth in MJ-treated trees. Our results show that during both years, treatment with a simple, two-component interruptant system of verbenone and trans-conophthorin significantly reduced I. perturbatus attack density and tree mortality on attractant-baited trees and provided a full year of protection from bark beetle attack.

Andrew D. Graves; Edward H. Holsten; Mark E. Ascerno; Kenneth P. Zogas; John S. Hard; Dezene P.W. Huber; Robert A. Blanchette; Steven J. Seybold

2008-01-01T23:59:59.000Z

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


41

Black Holes in Active Galaxies  

E-Print Network [OSTI]

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

A. J. Barth

2003-10-15T23:59:59.000Z

42

Of the Black Hole Thermodynamics  

E-Print Network [OSTI]

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

Xinyong Fu

2005-01-11T23:59:59.000Z

43

Aerial photographic monitoring of spruce damage in Bayerischer Wald National Park, Federal Republic of Germany  

E-Print Network [OSTI]

) August, 1989 Forest damage or '%aldschaden" has became a matter of increasing ~ in ~ ~. In 1983, 34 ~ of the forests of the F~ ~lic of ~ were found to be affected. In Southern ~'s state of Bavaria, 45 percent of the forests were found... to be In an attempt to detecnine the rate at which the forest ~ phenomenon ? particularly with ~ to Norway spruce (Picea abies Karst. ) ? is wo~ in Bayerischer Weld National Park, an air photo interpretation study was conducted utilizing large scale 1:3000 color...

Goebel, John Martin

1989-01-01T23:59:59.000Z

44

J.K. Spruce power plant, Unit 1, San Antonio, Texas  

SciTech Connect (OSTI)

CPS Energy's J.K. Spruce power plant, Unit 1 was recently recognised by the EUCG Fossil Productivity Committee as the best performer in the large coal plant category over the 2002-2006 evaluation period. The competition was tough, with more than 80 plants in the running, but Unit 1 emerged as the clear winner by earning top points for high plant reliability and very low nonfuel O & M costs. It meets its environmental goals when burning PRB coal in its tangentially fired furnace with recently upgraded low NOx burners, overfire air and a new combustion control system. A baghouse and wet flue gas desulfurization system clean up combustion products. 3 photos.

Peltier, R. [CPS Energy (United States)

2008-10-15T23:59:59.000Z

45

Black carbon snow albedo reduction  

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

Black carbon snow albedo reduction Black carbon snow albedo reduction Title Black carbon snow albedo reduction Publication Type Journal Article Year of Publication 2012 Authors Hadley, Odelle L., and Thomas W. Kirchstetter Journal Nature Climate Change Volume 2 Pagination 437-440 Abstract Climate models indicate that the reduction of surface albedo caused by black-carbon contamination of snow contributes to global warming and near-worldwide melting of ice1, 2. In this study, we generated and characterized pure and black-carbon-laden snow in the laboratory and verified that black-carbon contamination appreciably reduces snow albedo at levels that have been found in natural settings1, 3, 4. Increasing the size of snow grains in our experiments decreased snow albedo and amplified the radiative perturbation of black carbon, which justifies the aging-related positive feedbacks that are included in climate models. Moreover, our data provide an extensive verification of the Snow, Ice and Aerosol Radiation model1, which will be included in the next assessment of the Intergovernmental Panel on Climate Change5.

46

Supermassive Black Holes  

E-Print Network [OSTI]

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

Fulvio Melia

2007-05-10T23:59:59.000Z

47

Using stable isotopes of water to characterize the hydrological cycle in a northern Minnesota black spruce-sphagnum bog forest  

E-Print Network [OSTI]

ratios of oxygen and hydrogen Aerial photograph of the landscape around the S-1 bog Primary Standard 18O Reference Value D Reference Value VSMOW2 0 0 GISP -24.78 -189.5 SLAP2 -55.5 -427.5 Site Depth (mm

48

Bromine and Chlorine in Aerosols and Fly Ash when Co-Firing Solid Recovered Fuel, Spruce Bark and Paper Mill Sludge in a 80MWth BFB Boiler  

Science Journals Connector (OSTI)

Aerosol and fly ash sampling was carried out at a 80MWth bubbling fluidised bed (BFB) boiler plant co-firing solid recovered fuel (SRF), spruce bark and paper mill ... conditions. The SRF-Bark ratio in the fuel m...

P. Vainikka; J. Silvennoinen; P. Yrjas…

2010-01-01T23:59:59.000Z

49

Quantifying fatigue generated in high strain rate cyclic loading of Norway spruce  

Science Journals Connector (OSTI)

Papermaking especially mechanical pulping consumes much energy. To reduce this energy consumption one has to understand and exploit the phenomena present during the pulping. An important phenomenon to understand is wood fatigue. We quantitatively measure the fatigue generated during high strain rate cyclic loading of spruce wood performed under conditions resembling those present during mechanical pulping. We impacted the samples with 5% strain pulses at 500 Hz. The radial direction stiffness drop in the samples was quantified by 500 kHz ultrasonic through-transmission postimpacting. The depth profile of the generated fatigue was also determined. A dependency of the amount of fatigue generated during cyclic straining on the moisture content was detected. A hypothesis about the temporal and spatial evolution of the fatigue during the process is presented. The results supporting the hypothesis provide insight into wood behavior under mechanical pulping conditions.

Ari Salmi; Lauri Salminen; Edward Hæggström

2009-01-01T23:59:59.000Z

50

Case history of population change in a `bacillus thuringiensis`-treated versus an untreated outbreak of the western spruce budworm. Forest Service research note  

SciTech Connect (OSTI)

Larval densities of the western spruce budworm (Choristoneura occidentalis Freeman) were monitored for 12 years (1984-95) on permanent sample plots in northeastern Oregon. The time series spanned a period of general budworm infestations when populations increased rapidly from low densities, plateaued for a time at high-outbreak densities, and then declind suddenly. Midway through the period (1988), an area with half of the sample plots was sprayed with the microbial insecticide Bacillus thuringiensis (B.t.) in an operational suppression project. The other sample plots were part of an untreated area. In the treated area, B.t. spray reduced numbers of larvae by more than 90 percent; however, populations returned to an outbreak density within 3 years. In the untreated area, populations remained at outbreak densities and continued to fluctuate due to natural feedback processes. Natural decline of the population (1992-95) in the monitored area was largely unexplained and coincided with an overall collapse of the budworm outbreak in the Blue Mountains.

Mason, R.R.; Paul, H.G.

1996-09-01T23:59:59.000Z

51

Black Hole Horizons and Black Hole Thermodynamics.  

E-Print Network [OSTI]

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

Nielsen, Alex

2007-01-01T23:59:59.000Z

52

Fossil Energy Acting Assistant Secretary Recognized at Black Engineer of  

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

Fossil Energy Acting Assistant Secretary Recognized at Black Fossil Energy Acting Assistant Secretary Recognized at Black Engineer of the Year Awards Fossil Energy Acting Assistant Secretary Recognized at Black Engineer of the Year Awards February 19, 2013 - 8:54am Addthis Director Dot Harris presents Chris Smith, Principal Deputy Assistant Secretary and Acting Assistant Secretary of Fossil Energy, with a professional achievement award at the Black Engineer of the Year Awards conference this February. Photo Credit: Nancy Jo Brown/106FOTO Director Dot Harris presents Chris Smith, Principal Deputy Assistant Secretary and Acting Assistant Secretary of Fossil Energy, with a professional achievement award at the Black Engineer of the Year Awards conference this February. Photo Credit: Nancy Jo Brown/106FOTO Dot Harris Dot Harris

53

Fossil Energy Acting Assistant Secretary Recognized at Black Engineer of  

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

Fossil Energy Acting Assistant Secretary Recognized at Black Fossil Energy Acting Assistant Secretary Recognized at Black Engineer of the Year Awards Fossil Energy Acting Assistant Secretary Recognized at Black Engineer of the Year Awards February 19, 2013 - 8:54am Addthis Director Dot Harris presents Chris Smith, Principal Deputy Assistant Secretary and Acting Assistant Secretary of Fossil Energy, with a professional achievement award at the Black Engineer of the Year Awards conference this February. Photo Credit: Nancy Jo Brown/106FOTO Director Dot Harris presents Chris Smith, Principal Deputy Assistant Secretary and Acting Assistant Secretary of Fossil Energy, with a professional achievement award at the Black Engineer of the Year Awards conference this February. Photo Credit: Nancy Jo Brown/106FOTO Dot Harris Dot Harris

54

Black Hole Chemistry  

E-Print Network [OSTI]

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

David Kubiznak; Robert B. Mann

2014-04-08T23:59:59.000Z

55

RHIC | Black Holes?  

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

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

56

Scleroderris Canker in the Province of Quebec, Canada  

Science Journals Connector (OSTI)

Gremmeniella abietina was first collected in Quebec in 1964 on white and black spruce ... 10-year-old red pine plantation in southern Quebec in 1978. An intensive survey of the...

Denis Lachance

1984-01-01T23:59:59.000Z

57

Spruce roots under heavy machinery loading in two different soil types  

Science Journals Connector (OSTI)

We studied the influence of soil compaction by heavy machinery (two-wheeled trailer with 0.2 MPa pressure) on spruce roots at two sites in the Moravian Highlands with different soil properties to determine whether soil compaction by loading affects root water uptake. We also analysed the effects of the soil type and water-holding capacity with regards to root structure development. Site Jedovnice has a loamy to sandy–loamy soil texture with a shallow groundwater table at approximately 1 m in depth. The roots are mostly distributed in deeper layers. Site Mraveništ? has shallow, sandy–loamy soil overlying a granodiorite. This site has no access to groundwater and a higher proportion of shallow roots. To evaluate the effect of soil compaction, we installed heat-field-deformation sap flow sensors in the superficial roots and stem bases of trees close to machinery trails. Our results showed that loading mainly affected soils with a high proportion of shallow roots (33% of shallow roots at site Mraveništ?; 22% at site Jedovnice). The number of roots treated by loading, verified after root opening with an air spade, depended on root positioning in soil. Acropetal sap flow occurred in roots in soil layers with sufficient available soil water. Some of the sampled trees exhibited decreased daytime sap flow after loading. In the shallower site Mraveništ? the root responses to loading were also accompanied by water redistribution among the roots and between the roots and soil. Basipetal (reverse) flow was recorded in roots in dryer soil layers. Soil compaction due to loading substantially increased the magnitude and duration of redistributed flow between soil layers with different water contents. Determining the soil type and soil water content is recommended before choosing the machinery type for a given forest because the predicted tree root structure can be used to assess possible damage due to loading.

Nadezhda Nadezhdina; Alois Prax; Jan ?ermák; Valerij Nadezhdin; Radomír Ulrich; Jind?ich Neruda; Adolf Schlaghamersky

2012-01-01T23:59:59.000Z

58

Uniformly accelerated black holes  

Science Journals Connector (OSTI)

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

Patricio S. Letelier and Samuel R. Oliveira

2001-08-24T23:59:59.000Z

59

Bicycling Black Rings  

E-Print Network [OSTI]

We present detailed physics analyses of two different 4+1-dimensional asymptotically flat vacuum black hole solutions with spin in two independent planes: the doubly spinning black ring and the bicycling black ring system ("bi-rings"). The latter is a new solution describing two concentric orthogonal rotating black rings which we construct using the inverse scattering technique. We focus particularly on extremal zero-temperature limits of the solutions. Such limits exist for both types of solutions; for the bi-rings it is obtained when the two rings drag each other to extremality through the effect of gravitational frame-dragging. We construct the phase diagram of currently known zero-temperature vacuum black hole solutions with a single event horizon, and discuss the non-uniqueness introduced by more exotic black hole configurations such as bi-rings and multi-ring saturns.

Elvang, Henriette

2008-01-01T23:59:59.000Z

60

Bicycling Black Rings  

E-Print Network [OSTI]

We present detailed physics analyses of two different 4+1-dimensional asymptotically flat vacuum black hole solutions with spin in two independent planes: the doubly spinning black ring and the bicycling black ring system ("bi-rings"). The latter is a new solution describing two concentric orthogonal rotating black rings which we construct using the inverse scattering technique. We focus particularly on extremal zero-temperature limits of the solutions. We construct the phase diagram of currently known zero-temperature vacuum black hole solutions with a single event horizon, and discuss the non-uniqueness introduced by more exotic black hole configurations such as bi-rings and multi-ring saturns.

Henriette Elvang; Maria J. Rodriguez

2008-01-25T23:59:59.000Z

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


61

BLACK HISTORY MONTH  

Broader source: Energy.gov [DOE]

Black History Month is an annual celebration of achievements by black Americans and a time for recognizing the central role of African Americans in U.S. history. The event grew out of “Negro History Week,” created by historian Carter G. Woodson and other prominent African Americans. Other countries around the world, including Canada and the United Kingdom, also devote a month to celebrating black history.

62

Accreting Black Holes  

E-Print Network [OSTI]

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

Begelman, Mitchell C

2014-01-01T23:59:59.000Z

63

ARM - Black Forest News  

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

News Campaign Images Black Forest News ARM Mobile Facility Completes Field Campaign in Germany January 15, 2008 Microwave Radiometers Put to the Test in Germany September 15, 2007...

64

Black holes and thermodynamics  

Science Journals Connector (OSTI)

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

S. W. Hawking

1976-01-15T23:59:59.000Z

65

Effects of Forest Management on Total Biomass Production and CO2 Emissions from use of Energy Biomass of Norway Spruce and Scots Pine  

Science Journals Connector (OSTI)

The aim of this study was to analyze the effects of forest management on the total biomass production (t ha-1a-1) and CO2 emissions (kg CO2 MWh-1) from use of energy biomass of Norway spruce and Scots pine grown ...

Johanna Routa; Seppo Kellomäki; Harri Strandman

2012-09-01T23:59:59.000Z

66

Black Pine Engineering Wins Clean Energy Trust Clean Energy Challenge...  

Office of Environmental Management (EM)

steam loss. According to Black Pine, the technology can boost power generation at geothermal plants by 8% and increase revenue by more than 280,000 per year per well....

67

"Hybrid" Black Holes  

E-Print Network [OSTI]

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

Valeri P. Frolov; Andrei V. Frolov

2014-12-30T23:59:59.000Z

68

RHIC | Black Holes?  

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

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

69

Charged Schrodinger black holes  

E-Print Network [OSTI]

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

Adams, Allan

70

The Black Bear  

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

Black Bear Black Bear Nature Bulletin No. 286-A December 9, 1967 Forest Preserve District of Cook County Richard B. Ogilvie, President Roland F. Eisenbeis, Supt. of Conservation THE BLACK BEAR The most amusing and human-like of all our American wild animals is the Black Bear. Slow, clumsy and loose-jointed in appearance, with a shambling gait, he can be very swift and nimble. Like any good clown he is also a good acrobat with a fine sense of balance and timing. He is a great climber in spite of his bulk. Shrewd and droll, he is very popular in menageries and as a performer in circuses and side shows because he learns tricks easily. He can stand on his hind legs to wrestle, box, dance, or beg for food and, occasionally, one becomes a graceful artist on roller skates. They love applause.

71

On Black Hole Entropy  

E-Print Network [OSTI]

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

Ted Jacobson; Gungwon Kang; Robert C. Myers

1994-01-03T23:59:59.000Z

72

Overview of GRI research at the Rock Creek Site, Black Warrior Basin. Overview of GRI research at Rock Creek: Eight years of cooperative research, coalbed methane shortcourse. Held in Abingdon, Virginia on October 23, 1992. Topical report  

SciTech Connect (OSTI)

The presentation slides from the October 23, 1992 workshop on coalbed methane exploration and production are assembled in this volume. They illustrate the following discussions: Overview of GRI Research at Rock Creek: Eight Years of Cooperative Research, Drilling and Completing Coalbed Methane Wells: Techniques for Fragile Formations, Connecting the Wellborne to the Formation: Perforations vs. Slotting, Coalbed Methane Well Testing in the Warrior Basin, Reservoir Engineering: A Case Study at Rock Creek, Fraccing of Multiple Thin Seams: Considerations and Constraints, Implementing Coal Seam Stimulations: Requirements for Successful Treatments, Coal-Fluid Interactions, Mine-Through Observations of Coal Seam Stimulations: Reality vs. Theory, and Recompleting Coalbed Methane Wells: The Second Try at Success.

Schraufnagel, R.

1992-10-01T23:59:59.000Z

73

Experimental Signature for Black Hole Production in Neutrino Air Showers  

E-Print Network [OSTI]

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

Luis Anchordoqui; Haim Goldberg

2001-10-15T23:59:59.000Z

74

Chapter 2 - Black Liquor Gasification  

Science Journals Connector (OSTI)

Black liquor gasification (BLG) is being considered primarily as an option for production of biofuels in recent years due to the focus on the transport sector’s high oil dependence and climate impact. BLG may be performed either at low temperatures or at high temperatures, based on whether the process is conducted above or below the melting temperature range of the spent pulping chemicals. The development of various BLG technologies—SCA-Billerud process, the Copeland recovery process, Weyerhaeuser’s process, the St. Regis hydropyrolysis process, the Texaco process, VTT’s circulating fluidized bed BLG process, Babcock and Wilcox’s bubbling fluidized bed gasification process, NSP process (Ny Sodahus Process), DARS (Direct Alkali Recovery System) process, BLG with direct causticization, Manufacturing and Technology Conversion International fluidized bed gasification, Chemrec gasification, catalytic hydrothermal gasification of black liquor—is discussed in this chapter. The two main technologies under development are pressurized gasification and atmospheric gasification, being commercialized by Chemrec AB and ThermoChem Recovery International, respectively.

Pratima Bajpai

2014-01-01T23:59:59.000Z

75

Furnace Black Characterization  

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

Furnace Black Furnace Black Characterization Sid Richardson Carbon Co Fort Worth, TX Dr. Michel Gerspacher 005F 2 Definitions Particle Aggregate = 20nm to 100nm "Diameter" = 200nm to 1,000nm "Length" = Set of Percolated Aggregates Particle (?) Aggregate Agglomerate Constituents Size = Tech/Scientific Challenge 005F 3 Furnace Process High Temperature Refractory Feedstock Oil Air Natural Gas Reaction Zone Quench 005F 4 Specific Surface Area 005F 5 Structure 3-D Morphology Key Characteristic Summary of Crystallographic Studies 005F 7 Methodologies 005F 8 Summary * For all furnace carbon black 12Å < L C < 17Å * Crystallite L a ≈ 25Å * Amorphous Carbon * No micropores * Very few surface groups (hetero atoms) { 005F 9 Effect of Heat Treatment on Amorphous Carbon

76

Satellite-Based Modeling of the Carbon Fluxes in Mature Black Spruce Forests in Alaska: A Synthesis of the Eddy Covariance Data and Satellite Remote Sensing Data  

Science Journals Connector (OSTI)

Scaling up of observed point data to estimate regional carbon fluxes is an important issue in the context of the global terrestrial carbon cycle. In this study, the authors proposed a new model to scale up the eddy covariance data to estimate ...

Masahito Ueyama; Yoshinobu Harazono; Kazuhito Ichii

2010-10-01T23:59:59.000Z

77

The effects of fire on the thermal stability of permafrost in lowland and upland black spruce forests of interior Alaska in a changing climate  

E-Print Network [OSTI]

, University of Colorado at Boulder, Boulder, CO, USA 2 Geophysical Institute, University of Alaska Fairbanks and climate warming. Keywords: permafrost, wildfires, active layer, carbon cycle, climate change, GIPL

Ickert-Bond, Steffi

78

Absorption of planar massless scalar waves by Bardeen regular black holes  

E-Print Network [OSTI]

Accretion of fields by black holes is a subject of great interest in physics. It is known that accretion plays a fundamental role in active galactic nuclei and in the evolution of black holes. Accretion of fundamental fields is often related to the study of absorption cross section. Basically all black holes for which absorption of fields has been studied so far present singularities. However, even within general relativity, it is possible to construct regular black holes: objects with event horizons but without singularities. Many physically motivated regular black hole solutions have been proposed in the past years, demanding the understanding of their absorption properties. We study the absorption of planar massless scalar waves by Bardeen regular black holes. We compare the absorption cross section of Bardeen and Reissner--Nordstr\\"om black holes, showing that the former always have a bigger absorption cross section for fixed values of the field frequency and of the normalized black hole charge. We also show that it is possible for a Bardeen black hole to have the same high-frequency absorption cross section of a Reissner--Nordstr\\"om black hole. Our results suggest that, in mid-to-high-frequency regimes, regular black holes can have compatible properties with black holes with singularities, as far as absorption is concerned.

Caio F. B. Macedo; Luís C. B. Crispino

2014-08-08T23:59:59.000Z

79

Black holes at accelerators.  

E-Print Network [OSTI]

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

Webber, Bryan R

80

Extremal black disks in QCD  

E-Print Network [OSTI]

We argue that in the high energy QCD a true black disk wave function necessarily contains many quarks. This corresponds to necessity of non-vacuum reggeon loops in formation of a black disk. The result comes from decomposition of the black disk S-matrix in characters on group manifold.

Alexey V. Popov

2008-05-12T23:59:59.000Z

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


81

Black holes and black strings in plane waves  

E-Print Network [OSTI]

We investigate the construction of black holes and black strings in vacuum plane wave spacetimes using the method of matched asymptotic expansions. We find solutions of the linearised equations of motion in the asymptotic region for a general source on a plane wave background. We observe that these solutions do not satisfy our previously defined conditions for being asymptotically plane wave. Hence, the space of asymptotically plane wave solutions is restricted. We consider the solution in the near region, treating the plane wave as a perturbation of a black object, and find that there is a regular black string solution but no regular black hole solution.

Julian Le Witt; Simon F. Ross

2009-10-30T23:59:59.000Z

82

Gasification of black liquor  

DOE Patents [OSTI]

A concentrated aqueous black liquor containing carbonaceous material and alkali metal sulfur compounds is treated in a gasifier vessel containing a relatively shallow molten salt pool at its bottom to form a combustible gas and a sulfide-rich melt. The gasifier vessel, which is preferably pressurized, has a black liquor drying zone at its upper part, a black liquor solids gasification zone located below the drying zone, and a molten salt sulfur reduction zone which comprises the molten salt pool. A first portion of an oxygen-containing gas is introduced into the gas space in the gasification zone immediatley above the molten salt pool. The remainder of the oxygen-containing gas is introduced into the molten salt pool in an amount sufficient to cause gasification of carbonaceous material entering the pool from the gasification zone but not sufficient to create oxidizing conditions in the pool. The total amount of the oxygen-containing gas introduced both above the pool and into the pool constitutes between 25 and 55% of the amount required for complete combustion of the black liquor feed. A combustible gas is withdrawn from an upper portion of the drying zone, and a melt in which the sulfur content is predominantly in the form of alkali metal sulfide is withdrawn from the molten salt sulfur reduction zone.

Kohl, Arthur L. (Woodland Hills, CA)

1987-07-28T23:59:59.000Z

83

Black brane steady states  

E-Print Network [OSTI]

We follow the evolution of an asymptotically AdS black brane with a fixed temperature gradient at spatial infinity until a steady state is formed. The resulting energy density and energy flux of the steady state in the boundary theory are compared to a conjecture on the behavior of steady states in conformal field theories. Very good agreement is found.

Amado, Irene

2015-01-01T23:59:59.000Z

84

Inside a black hole  

Science Journals Connector (OSTI)

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

William A. Hiscock

1991-10-24T23:59:59.000Z

85

Y YEAR  

National Nuclear Security Administration (NNSA)

5 79 -7.06% YEAR 2013 2014 Males 59 57 -3.39% Females 26 22 -15.38% YEAR 2013 2014 SES 1 0 -100% EJEK 4 3 -25.00% EN 05 3 2 -33.33% EN 04 22 22 0% EN 03...

86

Y YEAR  

National Nuclear Security Administration (NNSA)

2 40 -4.76% YEAR 2013 2014 Males 37 35 -5.41% Females 5 5 0% YEAR 2013 2014 SES 2 2 0% EJEK 5 4 -20.00% EN 05 5 7 40.00% EN 04 6 6 0% EN 03 1 1 0% NN...

87

Y YEAR  

National Nuclear Security Administration (NNSA)

91 81 -10.99% YEAR 2013 2014 Males 67 56 -16.42% Females 24 25 4.17% YEAR 2013 2014 SES 1 2 100% EJEK 9 8 -11.11% EN 04 25 22 -12.00% NN (Engineering) 24...

88

,* Copper transport and accumulation in spruce stems (picea abies(L.) Karsten) revelaed by laser-induced breakdown spectroscopy  

SciTech Connect (OSTI)

Laser-Induced Breakdown Spectroscopy (LIBS) in double pulse configuration (DP LIBS) was used for scanning elemental spatial distribution in annual terminal stems of spruce (Picea abies (L.) Karsten). Cross sections of stems cultivated in Cu2+ solution of different concentrations were prepared and analyzed by DP LIBS. Raster scanning with 150 m spatial resolution was set and 2D (2-dimentional) maps of Cu and Ca distribution were created on the basis of the data obtained. Stem parts originating in the vicinity of the implementation of the cross sections were mineralized and subsequently Cu and Ca contents were analyzed by inductively coupled plasma mass spectrometry (ICP-MS). The results provide quantitative information about overall concentration of the elements in places, where LIBS measurements were performed. The fluorescence pictures were created to compare LIBS distribution maps and the fluorescence intensity (or the increase in autofluorescence) was used for the comparison of ICP-MS quantitative results. Results from these three methods can be utilized for quantitative measurements of copper ions transport in different plant compartments in dependence on the concentration of cultivation medium and/or the time of cultivation.

Krajcarova, Dr. Lucie [Czech Technical University; Novotny, Dr. Karel [Mendel University of Brno; Babula, Dr. Petr [Czech Technical University; Pravaznik, Dr Ivo [Czech Technical University; Kucerova, Dr. Petra [Czech Technical University; Vojtech, Dr. Adam [Czech Technical University; Martin, Madhavi Z [ORNL; Kizek, Dr. Rene [Czech Technical University; Kaiser, Jozef [ORNL

2013-01-01T23:59:59.000Z

89

Fiscal Year 2008 Annual Federal Performance Report On Executive Agency  

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

Fiscal Year 2008 Annual Federal Performance Report On Executive Fiscal Year 2008 Annual Federal Performance Report On Executive Agency Actions To Assist Historically Black Colleges And Universities Fiscal Year 2008 Annual Federal Performance Report On Executive Agency Actions To Assist Historically Black Colleges And Universities Packet of information to the Secretary of Education Fiscal Year 2008 Annual Federal Performance Report On Executive Agency Actions To Assist Historically Black Colleges And Universities More Documents & Publications Minority Serving Institutions (MSIs): Bridging the Gap between Federal Agencies and MSIs Office of Energy Efficiency and Renewable Energy (EERE) -Historically Black Colleges and Universities 12 Annual Small Business Conference & Expo Minority Serving Institutions (MSIs)-Bridging the Gap Between Federal Agencies and MSIs

90

Quantification of Black Carbon and Other Pollutant Emissions from a  

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

Quantification of Black Carbon and Other Pollutant Emissions from a Quantification of Black Carbon and Other Pollutant Emissions from a Traditional and an Improved Cookstove Title Quantification of Black Carbon and Other Pollutant Emissions from a Traditional and an Improved Cookstove Publication Type Report LBNL Report Number LBNL-6062E Year of Publication 2010 Authors Kirchstetter, Thomas W., Chelsea Preble, Odelle L. Hadley, and Ashok J. Gadgil Keywords aethalometer, Berkeley Darfur Stove, black carbon, carbon monoxide, climate change, DustTrak, global warming, improved cookstoves, indoor air quality, LBNL Stove Testing Facility, particulate matter, photoacoustic absorption spectrometer, pollutant emission factor, three-stone fire Abstract Traditional methods of cooking in developing regions of the world emit pollutants that

91

Black hole lasers  

Science Journals Connector (OSTI)

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

Steven Corley and Ted Jacobson

1999-05-17T23:59:59.000Z

92

Black Pine Circle Project  

ScienceCinema (OSTI)

A group of seventh graders from Black Pine Circle school in Berkeley had the opportunity to experience the Advanced Light Source (ALS) as "users" via a collaborative field trip and proposal project. The project culminated with a field trip to the ALS for all seventh graders, which included a visit to the ALS data visualization room, a diffraction demonstration, a beamline tour, and informative sessions about x-rays and tomography presented by ALS scientists.

Mytko, Christine

2014-09-15T23:59:59.000Z

93

Black Pine Circle Project  

SciTech Connect (OSTI)

A group of seventh graders from Black Pine Circle school in Berkeley had the opportunity to experience the Advanced Light Source (ALS) as "users" via a collaborative field trip and proposal project. The project culminated with a field trip to the ALS for all seventh graders, which included a visit to the ALS data visualization room, a diffraction demonstration, a beamline tour, and informative sessions about x-rays and tomography presented by ALS scientists.

Mytko, Christine

2014-03-31T23:59:59.000Z

94

Super-Eddington Mechanical Power of an Accreting Black Hole in M83  

Science Journals Connector (OSTI)

...of plausible shock velocities (fig. S6). We conclude...LEdd (from the BH mass constraints). We...mp is the proton mass and {mu} the mean atomic weight...years. The expansion velocity vs = dR/dt = (3...A. , Black hole winds . Mon. Not. R...accreting stellar mass black holes as ultraluminous...

R. Soria; K. S. Long; W. P. Blair; L. Godfrey; K. D. Kuntz; E. Lenc; C. Stockdale; P. F. Winkler

2014-03-21T23:59:59.000Z

95

1Black Box Software Testing Copyright 2003 Cem Kaner The Role of Testers in XP  

E-Print Network [OSTI]

1Black Box Software Testing Copyright © 2003 Cem Kaner The Role of Testers in XP Cem Kaner August reflect the views of the National Science Foundation (NSF). #12;2Black Box Software Testing Copyright © 2003 Cem Kaner Testing: The Traditional View · Many years ago, the software development community

96

Red-black Tree Jingjing Xia  

E-Print Network [OSTI]

Advanced Algorithm Design Red-black Tree Jingjing Xia #12;Red-Black Tree A red-black tree is a binary search tree, and each node contains one extra field: its color, it can be either black or red of the binary search tree. If a binary search tree satisfies all the following red-black properties, it is a red

Chen, Yangjun

97

Why Blue-Collar Blacks Help Less  

E-Print Network [OSTI]

In Hispanics in the Why Blacks Help Less U.S. Economy, eds.71(1):42-71. Why Blacks Help Less Fernandez, Roberto M. andProblems 49 (1): 11- Why Blacks Help Less Heflin, Coleen M.

Smith, Sandra Susan; Young, Kara Alexis

2013-01-01T23:59:59.000Z

98

Structurally assisted blackness in butterfly scales  

Science Journals Connector (OSTI)

...research-article Structurally assisted blackness in butterfly scales...photonic structure| Structurally assisted blackness in butterfly scales...ultrastructure Structurally assisted blackness in butterfly scales...Controlled absorption of incident solar radiation is the principal...

2004-01-01T23:59:59.000Z

99

Black-white asymmetry in visual perception  

E-Print Network [OSTI]

tion of black and white in human vision. Investi- gativeneural responses to black and white ments are balanced, weand observers. The black– white asymmetry with a ¼ 1.28 is

Lu, Z.-L.; Sperling, G.

2012-01-01T23:59:59.000Z

100

Black Stars and Gamma Ray Bursts  

E-Print Network [OSTI]

Stars that are collapsing toward forming a black hole but are frozen near the Schwarzschild horizon are termed ``black stars''. Collisions of black stars, in contrast to black hole collisions, may be sources of gamma ray bursts, whose basic parameters are estimated quite simply and are found to be consistent with observed gamma ray bursts. Black star gamma ray bursts should be preceded by gravitational wave emission similar to that from the coalescence of black holes.

Tanmay Vachaspati

2007-06-08T23:59:59.000Z

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


101

Dynamics of the xanthophyll cycle and non-radiative dissipation of absorbed light energy during exposure of Norway spruce to high irradiance  

Science Journals Connector (OSTI)

Summary The response of Norway spruce saplings (Picea abies [L.] Karst.) was monitored continuously during short-term exposure (10 days) to high irradiance (HI; 1000 ?mol m?2 s?1). Compared with plants acclimated to low irradiance (100 ?mol m?2 s?1), plants after HI exposure were characterized by a significantly reduced CO2 assimilation rate throughout the light response curve. Pigment contents varied only slightly during HI exposure, but a rapid and strong response was observed in xanthophyll cycle activity, particularly within the first 3 days of the HI treatment. Both violaxanthin convertibility under HI and the amount of zeaxanthin pool sustained in darkness increased markedly under HI conditions. These changes were accompanied by an enhanced non-radiative dissipation of absorbed light energy (NRD) and the acceleration of induction of both NRD and de-epoxidation of the xanthophyll cycle pigments. We found a strong negative linear correlation between the amount of sustained de-epoxidized xanthophylls and the photosystem II (PSII) photochemical efficiency (FV/FM), indicating photoprotective down-regulation of the PSII function. Recovery of FV/FM at the end of the HI treatment revealed that Norway spruce was able to cope with a 10-fold elevated irradiance due particularly to an efficient NRD within the PSII antenna that was associated with enhanced violaxanthin convertibility and a light-induced accumulation of zeaxanthin that persisted in darkness.

Michal Štroch; Kristina Kuldová; Ji?í Kalina; Vladimír Špunda

2008-01-01T23:59:59.000Z

102

NSF GA-32589X I CHARACTERISTICS OF CARBON BLACK  

E-Print Network [OSTI]

for years. The amount of solar energy which can be absorbed by carbon black and transmitted to the air and the reduced solar radiation available inside the cloud. Such problems are to be expected when attempting particles in aerosol form spread artificially in the atmosphere to absorb solar radiation and hence

Gray, William

103

Black Holes And Their Entropy  

E-Print Network [OSTI]

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

Mei, Jianwei

2010-10-12T23:59:59.000Z

104

Black Hole Energy Extraction Problems  

Science Journals Connector (OSTI)

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

1972-11-24T23:59:59.000Z

105

Optical black holes and solitons  

E-Print Network [OSTI]

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

Shawn Westmoreland

2010-12-21T23:59:59.000Z

106

Entropy of Lovelock Black Holes  

E-Print Network [OSTI]

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

Ted Jacobson; Robert C. Myers

1993-05-06T23:59:59.000Z

107

AMF Deployment, Black Forest, Germany  

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

Germany Germany Black Forest Deployment AMF Home Black Forest Home Data Plots and Baseline Instruments CERA COPS Data University of Hohenheim COPS Website COPS Update, April 2009 Experiment Planning COPS Proposal Abstract and Related Campaigns Science Plan (PDF, 12.4M) Outreach COPS Backgrounder (PDF, 306K) Posters AMF Poster, German Vesion Researching Raindrops in the Black Forest News Campaign Images AMF Deployment, Black Forest, Germany Main Site: 48° 32' 24.18" N, 08° 23' 48.72" E Altitude: 511.43 meters In March 2007, the third deployment of the ARM Mobile Facility (AMF) will take place in the Black Forest region of Germany, where scientists will study rainfall resulting from atmospheric uplift (convection) in mountainous terrain, otherwise known as orographic precipitation. ARM

108

String-Corrected Black Holes  

SciTech Connect (OSTI)

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

Hubeny, Veronika; Maloney, Alexander; Rangamani, Mukund

2005-02-07T23:59:59.000Z

109

A Dark Year for Tidal Disruption Events  

E-Print Network [OSTI]

The disruption of a main-sequence star by a supermassive black hole results in the initial production of an extended debris stream that winds repeatedly around the black hole, producing a complex three-dimensional figure that may self-intersect. Both analytical work and simulations have shown that typical encounters generate streams that are extremely thin. In this paper we show that this implies that even small relativistic precessions attributed to black hole spin can induce deflections that prevent the stream from self-intersecting even after many windings. Additionally, hydrodynamical simulations have demonstrated that energy is deposited very slowly via hydrodynamic processes alone, resulting in the liberation of very little gravitational binding energy in the absence of stream-stream collisions. This naturally leads to a "dark period" in which the flare is not observable for some time, persisting for up to a dozen orbital periods of the most bound material, which translates to years for disruptions arou...

Guillochon, James

2015-01-01T23:59:59.000Z

110

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

Science Journals Connector (OSTI)

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

Pranab Ghosh

2000-06-11T23:59:59.000Z

111

Thermodynamics of Lifshitz black holes  

Science Journals Connector (OSTI)

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

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

2011-06-23T23:59:59.000Z

112

Ecology, Silviculture, and Management of Black Hills  

E-Print Network [OSTI]

ponderosa pine forests, and watershed management of the Black Hills. Keywords: Black Hills, silviculture of the Black Hills National Forest. The authors are grateful for the insightful and helpful reviews, and members of the Black Hills National Forest. We are thankful for Bob Hamre's editing of the manuscript

Fried, Jeremy S.

113

First law of black Saturn thermodynamics  

SciTech Connect (OSTI)

The physical process version and equilibrium state version of the first law of thermodynamics for a black object consisting of n-dimensional charged stationary axisymmetric black hole surrounded by a black rings, the so-called black Saturn, was derived. The general setting for our derivations is n-dimensional dilaton gravity with p+1 strength form fields.

Rogatko, Marek [Institute of Physics Maria Curie-Sklodowska University 20-031 Lublin, pl. Marii Curie-Sklodowskiej 1 (Poland)

2007-06-15T23:59:59.000Z

114

First law of black Saturn thermodynamics  

Science Journals Connector (OSTI)

The physical process version and equilibrium state version of the first law of thermodynamics for a black object consisting of n-dimensional charged stationary axisymmetric black hole surrounded by a black rings, the so-called black Saturn, was derived. The general setting for our derivations is n-dimensional dilaton gravity with p+1 strength form fields.

Marek Rogatko

2007-06-20T23:59:59.000Z

115

Student ID Advisor 1st Year Fall __________ (year) 1st Year Spr. __________ (year) 1st Year Sum. __________ (year)  

E-Print Network [OSTI]

Name Major Student ID Advisor 1st Year Fall __________ (year) 1st Year Spr. __________ (year) 1st) Projected Graduation Date SUBJECT SUBJECT CR. HRS. SUBJECT COURSE # CR. HRS. Advisor Signature Date Student

Barrash, Warren

116

Massive Black Hole Science with eLISA  

E-Print Network [OSTI]

The evolving Laser Interferometer Space Antenna (eLISA) will revolutionize our understanding of the formation and evolution of massive black holes along cosmic history by probing massive black hole binaries in the $10^3-10^7$ solar mass range out to redshift $z\\gtrsim 10$. High signal-to-noise ratio detections of $\\sim 10-100$ binary coalescences per year will allow accurate measurements of the parameters of individual binaries (such as their masses, spins and luminosity distance), and a deep understanding of the underlying cosmic massive black hole parent population. This wealth of unprecedented information can lead to breakthroughs in many areas of physics, including astrophysics, cosmology and fundamental physics. We review the current status of the field, recent progress and future challenges.

Enrico Barausse; Jillian Bellovary; Emanuele Berti; Kelly Holley-Bockelmann; Brian Farris; Bangalore Sathyaprakash; Alberto Sesana

2015-01-09T23:59:59.000Z

117

Thermodynamics of regular black hole  

E-Print Network [OSTI]

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

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

2007-08-23T23:59:59.000Z

118

Lattice Black Holes  

E-Print Network [OSTI]

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

Steven Corley; Ted Jacobson

1998-03-26T23:59:59.000Z

119

Red-Black Trees 1 2004 Goodrich, Tamassia Red-Black Trees  

E-Print Network [OSTI]

Red-Black Trees 1© 2004 Goodrich, Tamassia Red-Black Trees 6 3 8 4 v z #12;Red-Black Trees 2© 2004 Goodrich, Tamassia From (2,4) to Red-Black Trees A red-black tree is a representation of a (2,4) tree by means of a binary tree whose nodes are colored red or black In comparison with its associated (2,4) tree

Alechina, Natasha

120

Black hole quantum tunnelling and black hole entropy correction  

E-Print Network [OSTI]

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

Jingyi Zhang

2008-06-15T23:59:59.000Z

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


121

Relativistic Jets on all Scales in Accreting Black Holes: Contributions from Simbol-X  

SciTech Connect (OSTI)

In the last several years, multiwavelength observations of accreting black holes have allowed a general characterisation of black holes properties as they evolve along the course of their outburst cycles. Relativistic jets, in their multiple forms, have profoundly impacted our perception and understanding of emission processes in these systems. In these Proceedings, I will highlight some possible contributions from Simbol-X related to jets in accreting sources.

Corbel, Stephane [Universite Paris 7 Denis Diderot and Service d'Astrophysique, UMR AIM, CEA Saclay, F-91191 Gif sur Yvette (France)

2009-05-11T23:59:59.000Z

122

Energy on black hole spacetimes  

E-Print Network [OSTI]

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

Alejandro Corichi

2012-07-18T23:59:59.000Z

123

Supermassive black holes from supermassive stars  

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

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

124

Black hole binary inspiral and trajectory dominance  

E-Print Network [OSTI]

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

Price, Richard H.

125

Black hole Meissner effect and entanglement  

E-Print Network [OSTI]

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

Penna, Robert

126

Information loss in black holes  

Science Journals Connector (OSTI)

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

S. W. Hawking

2005-10-18T23:59:59.000Z

127

Black Emerald Group | Open Energy Information  

Open Energy Info (EERE)

Group Group Jump to: navigation, search Name Black Emerald Group Address 4 Park Place Place London, United Kingdom Zip SW1A 1LP Product Investment banking firm specializing in renewable energy and environmental technology corporate and project finance Year founded 1994 Website http://www.blackemerald.com/ Coordinates 51.5063321°, -0.1401519° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":51.5063321,"lon":-0.1401519,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

128

Hawking Emission and Black Hole Thermodynamics  

E-Print Network [OSTI]

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

Don N. Page

2006-12-18T23:59:59.000Z

129

White holes and eternal black holes  

E-Print Network [OSTI]

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

Stephen D. H. Hsu

2011-11-16T23:59:59.000Z

130

Conservation Assessment for Bloodroot in the Black  

E-Print Network [OSTI]

Conservation Assessment for Bloodroot in the Black Hills National Forest, South Dakota and Wyoming Forest Service Rocky Mountain Region Black Hills National Forest Custer, South Dakota April 2003 #12;Species Assessment of Bloodroot in the Black Hills National Forest, South Dakota and Wyoming J. Hope

131

6, 34193463, 2006 Black carbon or  

E-Print Network [OSTI]

ACPD 6, 3419­3463, 2006 Black carbon or brown carbon M. O. Andreae and A. Gelencs´er Title Page Chemistry and Physics Discussions Black carbon or brown carbon? The nature of light-absorbing carbonaceous;ACPD 6, 3419­3463, 2006 Black carbon or brown carbon M. O. Andreae and A. Gelencs´er Title Page

Paris-Sud XI, Université de

132

Absorption cross section in Lifshitz black hole  

E-Print Network [OSTI]

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

Taeyoon Moon; Yun Soo Myung

2012-05-10T23:59:59.000Z

133

Signatures of black holes at the LHC  

E-Print Network [OSTI]

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

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

2007-07-02T23:59:59.000Z

134

Earth: 15 Million Years Ago  

E-Print Network [OSTI]

In Einstein's general relativity theory the metric component gxx in the direction of motion (x-direction) of the sun deviates from unity due to a tensor potential caused by the black hole existing around the center of the galaxy. Because the solar system is orbiting around the galactic center at 200 km/s, the theory shows that the Newtonian gravitational potential due to the sun is not quite radial. At the present time, the ecliptic plane is almost perpendicular to the galactic plane, consistent with this modification of the Newtonian gravitational force. The ecliptic plane is assumed to maintain this orientation in the galactic space as it orbits around the galactic center, but the rotational angular momentum of the earth around its own axis can be assumed to be conserved. The earth is between the sun and the galactic center at the summer solstice all the time. As a consequence, the rotational axis of the earth would be parallel to the axis of the orbital rotation of the earth 15 million years ago, if the solar system has been orbiting around the galactic center at 200 km/s. The present theory concludes that the earth did not have seasons 15 million years ago. Therefore, the water on the earth was accumulated near the poles as ice and the sea level was very low. Geological evidence exists that confirms this effect. The resulting global ice-melting started 15 million years ago and is ending now.

Masataka Mizushima

2008-10-13T23:59:59.000Z

135

Donald Byrne (white) vs. Robert James "Bobby" Fischer (black) 1956 White Black  

E-Print Network [OSTI]

Donald Byrne (white) vs. Robert James "Bobby" Fischer (black) 1956 White Black 1. Nf3 Nf6 comments here are called "annotation" 2. c4 g6 3. Nc3 Bg7 black bishop sits on long diagonal 4. d4 0-0 white black threatens the queen 7. Qxc4 c6 8. e4 Nbd7 black's knight on b moves to d7 9. Rd1 Nb6 white's rook

Zirbel, Craig L.

136

Measurement of Black Carbon and Particle Number Emission Factors from  

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

Measurement of Black Carbon and Particle Number Emission Factors from Measurement of Black Carbon and Particle Number Emission Factors from Individual Heavy-Duty Trucks Title Measurement of Black Carbon and Particle Number Emission Factors from Individual Heavy-Duty Trucks Publication Type Journal Article Year of Publication 2009 Authors Ban-Weiss, George, Melissa M. Lunden, Thomas W. Kirchstetter, and Robert A. Harley Journal Environmental Science and Technology Abstract Emission factors for black carbon (BC) and particle number (PN) were measured from 226 individual heavy-duty (HD) diesel-fueled trucks driving through a 1 km-long California highway tunnel in August 2006. Emission factors were based on concurrent increases in BC, PN, and COB2B concentrations (measured at 1 Hz) that corresponded to the passage of individual HD trucks. The distributions of BC and PN emission factors from individual HD trucks are skewed, meaning that a large fraction of pollution comes from a small fraction of the in-use vehicle fleet. The highest-emitting 10% of trucks were

137

Characterizing spinning black hole binaries in eccentric orbits with LISA  

SciTech Connect (OSTI)

The Laser Interferometer Space Antenna (LISA) is designed to detect gravitational wave signals from astrophysical sources, including those from coalescing binary systems of compact objects such as black holes. Colliding galaxies have central black holes that sink to the center of the merged galaxy and begin to orbit one another and emit gravitational waves. Some galaxy evolution models predict that the binary black hole system will enter the LISA band with significant orbital eccentricity, while other models suggest that the orbits will already have circularized. Using a full 17 parameter waveform model that includes the effects of orbital eccentricity, spin precession, and higher harmonics, we investigate how well the source parameters can be inferred from simulated LISA data. Defining the reference eccentricity as the value one year before merger, we find that for typical LISA sources, it will be possible to measure the eccentricity to an accuracy of parts in a thousand. The accuracy with which the eccentricity can be measured depends only very weakly on the eccentricity, making it possible to distinguish circular orbits from those with very small eccentricities. LISA measurements of the orbital eccentricity can help constraints theories of galaxy mergers in the early universe. Failing to account for the eccentricity in the waveform modeling can lead to a loss of signal power and bias the estimation of parameters such as the black hole masses and spins.

Key, Joey Shapiro; Cornish, Neil J. [Department of Physics, Montana State University, Bozeman, Montana 59717 (United States)

2011-04-15T23:59:59.000Z

138

Post-1935 changes in forest vegetation of Grand Canyon National Park, Arizona, USA: Part 2—Mixed conifer, spruce-fir, and quaking aspen forests  

Science Journals Connector (OSTI)

This study examined changes in never-harvested mixed conifer (MCF), spruce-fir (SFF), and quaking aspen forests (QAF) in Grand Canyon National Park (GCNP), Arizona, USA based on repeat sampling of two sets of vegetation study plots, one originally sampled in 1935 and the other in 1984. The 1935 plots are the earliest-known, sample-intensive, quantitative documentation of forest vegetation over a Southwest USA landscape. Findings documented that previously described increases in densities and basal areas attributed to fire exclusion were followed by decreases in 1935–2004 and 1984–2005. Decreases in MCF were attributable primarily to quaking aspen (Populus tremuloides) and white fir (Abies concolor), but there were differences between dry-mesic and moist-mesic MCF subtypes. Decreases in SFF were attributable to quaking aspen, spruce (Picea engelmannii + Picea pungens), and subalpine fir (Abies lasiocarpa). Decreases in QAF resulted from the loss of quaking aspen during succession. Changes in ponderosa pine forest (PPF) are described in a parallel paper (Vankat, J.L., 2011. Post-1935 changes in forest vegetation of Grand Canyon National Park, Arizona, USA: part 1 – ponderosa pine forest. Forest Ecology and Management 261, 309–325). Graphical synthesis of historical and modern MCF data sets for GCNP indicated tree densities and basal areas increased from the late 19th to the mid 20th century and then decreased to the 21st century. Changes began earlier, occurred more rapidly, and/or were larger at higher elevation. Plot data showed that basal area decreased earlier and/or more rapidly than density and that decreases from 1935 to 2004 resulted in convergence among MCF, SFF, and PPF. If GCNP coniferous forests are trending toward conditions present before fire exclusion, this implies density and basal area were more similar among these forests in the late 19th century than in 1935. Changes in MCF and SFF can be placed in a general framework of forest accretion, inflection, and recession in which increases in tree density and basal area are followed by an inflection point and decreases. Accretion was triggered by the exogenous factor of fire exclusion, and inflection and recession apparently were driven by the endogenous factor of density-dependent mortality combined with exogenous factors such as climate. Although the decreases in density and basal area could be unique to GCNP, it is likely that the historical study plots provided a unique opportunity to quantitatively determine forest trends since 1935. This documentation of post-1935 decreases in MCF and SFF densities and basal areas indicates a shift in perspective on Southwestern forests is needed.

John L. Vankat

2011-01-01T23:59:59.000Z

139

Coal: the new black  

SciTech Connect (OSTI)

Long eclipsed by oil and natural gas as a raw material for high-volume chemicals, coal is making a comeback, with oil priced at more than $100 per barrel. It is relatively cheap feedstock for chemicals such as methanol and China is building plants to convert coal to polyolefins on a large scale and interest is spreading worldwide. Over the years several companies in the US and China have made fertilizers via the gasification of coal. Eastman in Tennessee gasifies coal to make methanol which is then converted to acetic acid, acetic anhydride and acetate fiber. The future vision is to convert methanol to olefins. UOP and Lurgi are the major vendors of this technology. These companies are the respective chemical engineering arms of Honeywell and Air Liquide. The article reports developments in China, USA and India on coal-to-chemicals via coal gasification or coal liquefaction. 2 figs., 2 photo.

Tullo, A.H.; Tremblay, J.-F.

2008-03-15T23:59:59.000Z

140

Viewing the Shadow of the Black Hole at the Galactic Center  

E-Print Network [OSTI]

In recent years, the evidence for the existence of an ultra-compact concentration of dark mass associated with the radio source Sgr A* in the Galactic Center has become very strong. However, an unambiguous proof that this object is indeed a black hole is still lacking. A defining characteristic of a black hole is the event horizon. To a distant observer, the event horizon casts a relatively large ``shadow'' with an apparent diameter of ~10 gravitational radii due to bending of light by the black hole, nearly independent of the black hole spin or orientation. The predicted size (~30 micro-arcseconds) of this shadow for Sgr A* approaches the resolution of current radio-interferometers. If the black hole is maximally spinning and viewed edge-on, then the shadow will be offset by ~8 micro-arcseconds from the center of mass, and will be slightly flattened on one side. Taking into account scatter-broadening of the image in the interstellar medium and the finite achievable telescope resolution, we show that the shadow of Sgr A* may be observable with very long-baseline interferometry at sub-millimeter wavelengths, assuming that the accretion flow is optically thin in this region of the spectrum. Hence, there exists a realistic expectation of imaging the event horizon of a black hole within the next few years.

Heino Falcke; Fulvio Melia; Eric Agol

1999-12-14T23:59:59.000Z

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


141

"Table 11. Fuel Economy, Selected Survey Years (Miles Per Gallon...  

U.S. Energy Information Administration (EIA) Indexed Site

" 60 Years or More","NA","NA",17.1,18.3,18.8,19.20543 "Race of Householder1" " White",15.3,"NA",18.3,19.3,19.8,20.02113 " Black ",13.3,"NA",18.5,19.4,19.8,21.37109 " Other...

142

Are You Planning to Buy Energy-Efficient Products on Black Friday? |  

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

Are You Planning to Buy Energy-Efficient Products on Black Friday? Are You Planning to Buy Energy-Efficient Products on Black Friday? Are You Planning to Buy Energy-Efficient Products on Black Friday? November 23, 2011 - 5:09am Addthis This week, Chris gave us some great information on shopping for energy-efficient products. He reminded us that the cost to run appliances and home office and electronics is just as important as the purchase price, and posted a new Energy Savers graphic that shows you how to read the EnergyGuide and Energy Star labels. It's a great reminder that when you buy energy-efficient products, you save money and energy all year 'round. If you're doing any Black Friday shopping, will you be looking for energy efficiency ratings using the EnergyGuide or Energy Star labels? Why or why not? E-mail your responses to the Energy Saver team at

143

Accelerating and rotating black holes  

E-Print Network [OSTI]

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

J. B. Griffiths; J. Podolsky

2005-07-06T23:59:59.000Z

144

Black Holes at the LHC  

E-Print Network [OSTI]

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

Panagiota Kanti

2008-02-15T23:59:59.000Z

145

Dave Kaminsky Charles L. Black  

E-Print Network [OSTI]

Edwin D. McKay Thomas L. McNeely Jean C. Persons Neysa P. Pickens Armant C. Touchy Jack S. Zoller 19511935 $50.00 Dave Kaminsky 1938 $200.00 Charles L. Black 1940 $50.00 Harold S. Miropol 1941 $67. Tennison Ben Thompson 1945 $250.00 Paul Finkelstein Harold J. Jacobs Lawrence Kahn 1946 $2,250.00 David W

146

Primordial black hole minimum mass  

SciTech Connect (OSTI)

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

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

2006-08-15T23:59:59.000Z

147

Black Hole Thermodynamics and Electromagnetism  

E-Print Network [OSTI]

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

Burra G. Sidharth

2005-07-15T23:59:59.000Z

148

Red-Black Trees 11/26/2007 11:09 AM Red-Black Trees 1 2004 Goodrich, Tamassia  

E-Print Network [OSTI]

Red-Black Trees 11/26/2007 11:09 AM 1 Red-Black Trees 1© 2004 Goodrich, Tamassia Red-Black Trees 6 3 8 4 v z Red-Black Trees 2© 2004 Goodrich, Tamassia From (2,4) to Red-Black Trees A red-black tree is a representation of a (2,4) tree by means of a binary tree whose nodes are colored red or black In comparison

Alechina, Natasha

149

Red-Black Trees 11/11/2004 10:02 AM Red-Black Trees 1 2004 Goodrich, Tamassia  

E-Print Network [OSTI]

Red-Black Trees 11/11/2004 10:02 AM 1 Red-Black Trees 1© 2004 Goodrich, Tamassia Red-Black Trees 6 3 8 4 v z Red-Black Trees 2© 2004 Goodrich, Tamassia From (2,4) to Red-Black Trees A red-black tree is a representation of a (2,4) tree by means of a binary tree whose nodes are colored red or black In comparison

Alechina, Natasha

150

Quantum Geometry and Black Holes  

E-Print Network [OSTI]

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

G., J Fernando Barbero

2015-01-01T23:59:59.000Z

151

Entanglement entropy of black holes  

E-Print Network [OSTI]

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

Sergey N. Solodukhin

2011-04-19T23:59:59.000Z

152

Black Mountain Insulation | Open Energy Information  

Open Energy Info (EERE)

Insulation Insulation Jump to: navigation, search Name Black Mountain Insulation Place United Kingdom Sector Carbon Product UK-based manufacturer of sheeps wool insulation which has a low carbon footprint than traditional glassfiber insulation. Website http://www.blackmountaininsula References Black Mountain Insulation Website[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Black Mountain Insulation is a company located in United Kingdom. It was formerly known as Ochre Natural Insulation Company. [2] References ↑ "Black Mountain Insulation Website" ↑ http://www.companiesintheuk.co.uk/ltd/black-mountain-insulation Retrieved from "http://en.openei.org/w/index.php?title=Black_Mountain_Insulation&oldid=391648

153

Colorful quantum black holes at the LHC  

E-Print Network [OSTI]

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

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

2008-06-27T23:59:59.000Z

154

FALL SPRING FALL SPRING FALL SPRINGFALL SPRING YEAR 1 YEAR 2 YEAR 3 YEAR 4  

E-Print Network [OSTI]

B FALL SPRING FALL SPRING FALL SPRINGFALL SPRING YEAR 1 YEAR 2 YEAR 3 YEAR 4 ECHM 100 (CHBE 100) 2). There is a pre- requisite of M-273Q (MATH 224). CHMY-373 (CHEM 324) could be taken Spring of year 3. Also, CHMY Math Placement ExamB M-172-Q (MATH 182) 4 cr Chemical Engineering Prerequisite Flowchart Catalog: 2010

Lawrence, Rick L.

155

FALL SPRING FALL SPRING FALL SPRINGFALL SPRING YEAR 1 YEAR 2 YEAR 3 YEAR 4  

E-Print Network [OSTI]

B FALL SPRING FALL SPRING FALL SPRINGFALL SPRING YEAR 1 YEAR 2 YEAR 3 YEAR 4 CHBE 100 2 cr CHMY-141 324) could be taken Spring of year 3. Also, CHMY-371 (CHEM 323) may be substituted for CHMY-373 (CHEM Engineering Prerequisite Flowchart Catalog: 2008-2010 updated 2009 rev. 06/29/10, rwl ­ new course numbers E

Lawrence, Rick L.

156

First & Second Years Third Year (Junior) Forth Year (Senior) Fifth Year Fall Spring Fall  

E-Print Network [OSTI]

) Social World Elective2 (3) Technical Elective5 CHEMICAL ENGINEERING Curriculum for Spring SemesterFirst & Second Years Third Year (Junior) Forth Year (Senior) Fifth Year Fall1 Spring1 Fall Spring Fall For your Freshman and Sophomore years, students should follow

Mountziaris, T. J.

157

Magnetized black holes and black rings in the higher dimensional dilaton gravity  

E-Print Network [OSTI]

In this paper we consider magnetized black holes and black rings in the higher dimensional dilaton gravity. Our study is based on exact solutions generated by applying a Harrison transformation to known asymptotically flat black hole and black ring solutions in higher dimensional spacetimes. The explicit solutions include the magnetized version of the higher dimensional Schwarzschild-Tangherlini black holes, Myers-Perry black holes and five dimensional (dipole) black rings. The basic physical quantities of the magnetized objects are calculated. We also discuss some properties of the solutions and their thermodynamics. The ultrarelativistic limits of the magnetized solutions are briefly discussed and an explicit example is given for the $D$-dimensional magnetized Schwarzschild-Tangherlini black holes.

Stoytcho S. Yazadjiev

2005-11-21T23:59:59.000Z

158

Economic aspects of black bases in Texas  

E-Print Network [OSTI]

. . . . . . . . . . . . 2 Crack length ratios for District 5. . . . . . . 5cI Crack length ratios for District 25. . . . . . 60 Aggregate gradation for laboratory molded black base mixtures. . . . . . . . . . . . . 66 5 Asphalt properties. Determination of optimum...)5 Section identification of District 5 'black base projects. . 255 Structural characteristics of District & black base projects. 254 Section identification of District 5 flexible base projects 255 Structural characteristics of District 5 flexible base...

Schoen, Wayne Ayron

2012-06-07T23:59:59.000Z

159

Spinning Black Holes as Particle Accelerators  

Science Journals Connector (OSTI)

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

Ted Jacobson and Thomas P. Sotiriou

2010-01-14T23:59:59.000Z

160

Black hole entropy: inside or out?  

E-Print Network [OSTI]

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

Ted Jacobson; Donald Marolf; Carlo Rovelli

2005-01-14T23:59:59.000Z

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


161

Interaction of fermions with black holes  

SciTech Connect (OSTI)

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

Jones T.O. III

1986-04-15T23:59:59.000Z

162

Absorption cross section of RN black hole  

E-Print Network [OSTI]

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

Sini R.; V. C. Kuriakose

2007-08-23T23:59:59.000Z

163

Red-black Trees To know what a red-black tree is (10.1).  

E-Print Network [OSTI]

809 CHAPTER 10 Red-black Trees Objectives · To know what a red-black tree is (§10.1). · To convert a red-black tree to a 2-4 tree and vice versa (§10.2). · To design the RBTree class that extends the BinaryTree class (§10.3). · To insert an element in a red-black tree and resolve the double red problem

Liang, Y. Daniel

164

Evaluation of Immobilized Enzyme in a High-Surface-Area Biofuel Cell Electrode Made of Redox-Polymer-Grafted Carbon Black  

Science Journals Connector (OSTI)

In recent years, nanocarbon materials like carbon black, carbon nanotubes, and carbon aerogel particles have been used by several groups to form three-dimensional electrodes. ... The TEM micrograph of the GOD-coated electrode was shown in Figure 2A. Figure 2B shows magnified image of the dotted frame in Figure 2A. The location of GOD and carbon black in Figure 2B was indicated in Figure 2C. A few tens of stained GOD, which were small black spots with a diameter of about 5 nm, were dispersed on each carbon black particle, which was a gray spot with a diameter of about 30 nm. ...

Takanori Tamaki; Atsushi Hiraide; Faizly B. Asmat; Hidenori Ohashi; Taichi Ito; Takeo Yamaguchi

2010-06-17T23:59:59.000Z

165

Strengthening Our Partnerships with Historically Black Colleges...  

Office of Environmental Management (EM)

Chu Secretary Chu Former Secretary of Energy Last February, President Obama renewed the White House Initiative on Historically Black Colleges and Universities to encourage...

166

Black Hills Power- Commercial Energy Efficiency Programs  

Broader source: Energy.gov [DOE]

Black Hills Power provides rebates for its commercial customers who install energy efficient heat pumps, motors, variable frequency drives, lighting, and water heaters. Custom rebates for approved...

167

Black Hills Power- Residential Customer Rebate Program  

Broader source: Energy.gov [DOE]

Black Hills Power offers cash rebates to residential customers who purchase and install energy efficient equipment in their homes. Incentives exist for water heaters, demand control units, air...

168

Thermodynamics of dilaton-axion black holes  

SciTech Connect (OSTI)

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

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

2008-12-15T23:59:59.000Z

169

Black Holes: from Speculations to Observations  

E-Print Network [OSTI]

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

Thomas W. Baumgarte

2006-04-13T23:59:59.000Z

170

Black Swans, Dragons-Kings and Prediction Black Swan (Cygnus atratus)  

E-Print Network [OSTI]

Black Swans, Dragons-Kings and Prediction Black Swan (Cygnus atratus) www.er.ethz.ch Didier hurricanes normalized to 1995 dollars by inflation, personal property increases and coastal county population;12 2008 FINANCIAL CRISIS #12;Crises are not but "Dragon-kings" Dragon-king hypothesis #12;Black Swan story

171

Stability of Biomass-derived Black Carbon in Soils . | EMSL  

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

Stability of Biomass-derived Black Carbon in Soils . Stability of Biomass-derived Black Carbon in Soils . Abstract: Black carbon (BC) may play an important role in the global C...

172

Dynamics of oscillating relativistic tori around Kerr black holes  

Science Journals Connector (OSTI)

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

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

2005-02-01T23:59:59.000Z

173

Locking Information in Black Holes  

Science Journals Connector (OSTI)

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

John A. Smolin and Jonathan Oppenheim

2006-02-28T23:59:59.000Z

174

The Supermassive Black Hole at the Galactic Center  

E-Print Network [OSTI]

The inner few parsecs at the Galactic Center have come under intense scrutiny in recent years, in part due to the exciting broad-band observations of this region, but also because of the growing interest from theorists motivated to study the physics of black hole accretion, magnetized gas dynamics and unusual star formation. The Galactic Center is now known to contain arguably the most compelling supermassive black hole candidate, weighing in at a little over 2.6 million suns. Its interaction with the nearby environment, comprised of clusters of evolved and young stars, a molecular dusty ring, ionized gas streamers, diffuse hot gas, and a hypernova remnant, is providing a wealth of accretion phenomenology and high-energy processes for detailed modeling. In this review, we summarize the latest observational results, and focus on the physical interpretation of the most intriguing object in this region---the compact radio source Sgr A*, thought to be the radiative manifestation of the supermassive black hole.

Fulvio Melia; Heino Falcke

2001-06-08T23:59:59.000Z

175

Foundation Year Aguideforinternationalstudents  

E-Print Network [OSTI]

Foundation Year Aguideforinternationalstudents #12;2 Contents TheFoundationYears 5 Engineering/Physics/Geophysics FoundationYear 6 ScienceFoundationYear 7 EntryRequirements 8 Moneymatters 10 Universitylife 10 The-termcommitmentandabig investmentinyourfuture.OurFoundationYearsare designedtoprepareyouforundergraduatestudyandto

Molinari, Marc

176

Foundation Year Aguideforstudents  

E-Print Network [OSTI]

Foundation Year Aguideforstudents #12;2 Contents TheFoundationYears 5 Engineering/Physics/Geophysics FoundationYear 6 ScienceFoundationYear 7 EntryRequirements 8 Moneymatters 10 Universitylife 10 TheUniversity 10 Thecity 10 Accommodation 10 Studentaccommodation MontefioreHouse4.. #12;3 OurFoundation

Anderson, Jim

177

Year 1 Year 2 Year 3 Year 4 Children's Hospital of  

E-Print Network [OSTI]

Year 1 Year 2 Year 3 Year 4 July General Pediatric Children's Hospital of Michigan High Risk Obstetrics Hutzel Women's Hospital Biochemical Genetics Lab/Metabolic Clinic Harper Hospital/ Children's Hospital of Michigan Reproductive Genetics Hutzel Women's Hospital August General Pediatric Children

Finley Jr., Russell L.

178

Radiation of the Inner Horizon of the Reissner-Nordström Black Hole  

E-Print Network [OSTI]

Despite of over thirty years of research of the black hole thermodynamics our understanding of the possible role played by the inner horizons of Reissner-Nordstr\\"om and Kerr-Newman black holes in black hole thermodynamics is still somewhat incomplete: There are derivations which imply that the temperature of the inner horizon is negative and it is not quite clear what this means. Motivated by this problem we perform a detailed analysis of the radiation emitted by the inner horizon of the Reissner-Nordstr\\"om black hole. As a result we find that in a maximally extended Reissner-Nordstr\\"om spacetime virtual particle-antiparticle pairs are created at the inner horizon of the Reissner-Nordstr\\"om black hole such that real particles with positive energy and temperature are emitted towards the singularity from the inner horizon and, as a consequence, antiparticles with negative energy are radiated away from the singularity through the inner horizon. We show that these antiparticles will come out from the white hole horizon in the maximally extended Reissner-Nordstr\\"om spacetime, at least when the hole is near extremality. The energy spectrum of the antiparticles leads to a positive temperature for the white hole horizon. In other words, our analysis predicts that in addition to the radiation effects of black hole horizons, also the white hole horizon radiates. The black hole radiation is caused by the quantum effects at the outer horizon, whereas the white hole radiation is caused by the quantum effects at the inner horizon of the Reissner-Nordstr\\"om black hole.

A. Peltola; J. Makela

2005-08-23T23:59:59.000Z

179

FALL SPRING FALL SPRING FALL SPRING FALL SPRING FALL Year 1 Year 2 Year 3 Year 4 Year 5  

E-Print Network [OSTI]

FALL SPRING FALL SPRING FALL SPRING FALL SPRING FALL Year 1 Year 2 Year 3 Year 4 Year 5 CORE W to meet BioE Engineering Elective Reqt. (c) ­ course used to meet ChE Techical Elective Reqt Revised 11

Lawrence, Rick L.

180

Congressional Black Caucus Foundation, Inc. Meet/Match Procurement...  

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

Congressional Black Caucus Foundation, Inc. MeetMatch Procurement Forum Congressional Black Caucus Foundation, Inc. MeetMatch Procurement Forum Presented by Congresswoman Sheila...

Note: This page contains sample records for the topic "black spruce year" from the National Library of EnergyBeta (NLEBeta).
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181

White House Initiative on Historically Black Colleges and Universities...  

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

White House Initiative on Historically Black Colleges and Universities White House Initiative on Historically Black Colleges and Universities How WHI-HBCU are ran White House...

182

U-012: BlackBerry Enterprise Server Collaboration Service Bug...  

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

12: BlackBerry Enterprise Server Collaboration Service Bug Lets Remote Users Impersonate Intra-organization Messages U-012: BlackBerry Enterprise Server Collaboration Service Bug...

183

Black holes cannot support conformal scalar hair  

E-Print Network [OSTI]

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

T. Zannias

1994-09-14T23:59:59.000Z

184

Can Reducing Black Carbon Emissions Counteract Global Warming?  

Science Journals Connector (OSTI)

Can Reducing Black Carbon Emissions Counteract Global Warming? ... It has been known for over 30 years that aerosols affect the Earth's radiative balance:? reflective particles (such as sulfates) have a cooling effect, and light-absorbing particles (such as BC) warm the system (3). ... Although Figure 3 shows many of the high-emitting devices that contribute most to global BC concentrations, much of the world's fuel is burned in low-emitting technologies such as pulverized coal burners and gasoline vehicles with current technology. ...

Tami C. Bond; Haolin Sun

2005-07-06T23:59:59.000Z

185

Wavy strings: Black or bright?  

SciTech Connect (OSTI)

Recent developments in string theory have brought forth considerable interest in time-dependent hair on extended objects. This novel new hair is typically characterized by a wave profile along the horizon and angular momentum quantum numbers l,m in the transverse space. In this work, we present an extensive treatment of such oscillating black objects, focusing on their geometric properties. We first give a theorem of purely geometric nature, stating that such wavy hair cannot be detected by any scalar invariant built out of the curvature and/or matter fields. However, we show that the tidal forces detected by an infalling observer diverge at the {open_quotes}horizon{close_quotes} of a black string superposed with a vibration in any mode with l{ge}1. The same argument applied to longitudinal (l=0) waves detects only finite leading-order tidal forces. We also provide an example with a manifestly smooth metric, proving that at least a certain class of these longitudinal waves have regular horizons. {copyright} {ital 1997} {ital The American Physical Society}

Kaloper, N. [Department of Physics, University of Waterloo, Waterloo, Ontario, N3L 3G1 (CANADA)] [Department of Physics, University of Waterloo, Waterloo, Ontario, N3L 3G1 (CANADA); Myers, R.C.; Roussel, H. [Department of Physics, McGill University, Montreal, Quebec, H3A 2T8 (CANADA)] [Department of Physics, McGill University, Montreal, Quebec, H3A 2T8 (CANADA)

1997-06-01T23:59:59.000Z

186

Refractory for Black Liquor Gasifiers  

SciTech Connect (OSTI)

The University of Missouri-Rolla will identify materials that will permit the safe, reliable and economical operation of combined cycle gasifiers by the pulp and paper industry. The primary emphasis of this project will be to resolve the materials problems encountered during the operation of low-pressure high-temperature (LFHT) and low-pressure low-temperature (LPLT) gasifiers while simultaneously understanding the materials barriers to the successful demonstration of high-pressure high-temperature (HPHT) black liquor gasifiers. This study will define the chemical, thermal and physical conditions in current and proposed gasifier designs and then modify existing materials and develop new materials to successfully meet the formidable material challenges. Resolving the material challenges of black liquor gasification combined cycle technology will provide energy, environmental, and economic benefits that include higher thermal efficiencies, up to three times greater electrical output per unit of fuel, and lower emissions. In the near term, adoption of this technology will allow the pulp and paper industry greater capital effectiveness and flexibility, as gasifiers are added to increase mill capacity. In the long term, combined-cycle gasification will lessen the industry's environmental impact while increasing its potential for energy production, allowing the production of all the mill's heat and power needs along with surplus electricity being returned to the grid. An added benefit will be the potential elimination of the possibility of smelt-water explosions, which constitute an important safety concern wherever conventional Tomlinson recovery boilers are operated. Developing cost-effective materials with improved performance in gasifier environments may be the best answer to the material challenges presented by black liquor gasification. Refractory materials may be selected/developed that either react with the gasifier environment to form protective surfaces in-situ; are functionally-graded to give the best combination of thermal, mechanical, and physical properties and chemical stability; or are relatively inexpensive, reliable repair materials. Material development will be divided into 2 tasks: Task 1, Development and property determinations of improved and existing refractory systems for black liquor containment. Refractory systems of interest include magnesia aluminate and baria aluminate spinels for binder materials, both dry and hydratable, and materials with high alumina contents, 85-95 wt%, aluminum oxide, 5.0-15.0 wt%, and BaO, SrO, CaO, ZrO and SiC. Task 2, Finite element analysis of heat flow and thermal stress/strain in the refractory lining and steel shell of existing and proposed vessel designs. Stress and strain due to thermal and chemical expansion has been observed to be detrimental to the lifespan of existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment materials.

William L. Headrick Jr; Alireza Rezaie

2003-12-01T23:59:59.000Z

187

Refractory for Black Liquor Gasifiers  

SciTech Connect (OSTI)

The University of Missouri-Rolla identified materials that permit the safe, reliable and economical operation of combined cycle gasifiers by the pulp and paper industry. The primary emphasis of this project was to resolve the material problems encountered during the operation of low-pressure high-temperature (LPHT) and low-pressure low-temperature (LPLT) gasifiers while simultaneously understanding the materials barriers to the successful demonstration of high-pressure high-temperature (HPHT) black liquor gasifiers. This study attempted to define the chemical, thermal and physical conditions in current and proposed gasifier designs and then modify existing materials and develop new materials to successfully meet the formidable material challenges. Resolving the material challenges of black liquor gasification combined cycle technology will provide energy, environmental, and economic benefits that include higher thermal efficiencies, up to three times greater electrical output per unit of fuel, and lower emissions. In the near term, adoption of this technology will allow the pulp and paper industry greater capital effectiveness and flexibility, as gasifiers are added to increase mill capacity. In the long term, combined-cycle gasification will lessen the industry's environmental impact while increasing its potential for energy production, allowing the production of all the mill's heat and power needs along with surplus electricity being returned to the grid. An added benefit will be the potential elimination of the possibility of smelt-water explosions, which constitute an important safety concern wherever conventional Tomlinson recovery boilers are operated. Developing cost-effective materials with improved performance in gasifier environments may be the best answer to the material challenges presented by black liquor gasification. Refractory materials were selected or developed that reacted with the gasifier environment to form protective surfaces in-situ; and were functionally-graded to give the best combination of thermal, mechanical and physical properties and chemical stability; and are relatively inexpensive, reliable repair materials. Material development was divided into 2 tasks: Task 1 was development and property determinations of improved and existing refractory systems for black liquor containment. Refractory systems of interest include magnesium aluminate and barium aluminate for binder materials, both dry and hydratable, and materials with high alumina contents, 85-95 wt%, aluminum oxide, 5.0-15.0 wt%, and BaO, SrO, CaO, ZrO2 and SiC. Task 2 was finite element analysis of heat flow and thermal stress/strain in the refractory lining and steel shell of existing and proposed vessel designs. Stress and strain due to thermal and chemical expansion has been observed to be detrimental to the lifespan of existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment materials.

William L. Headrick Jr; Alireza Rezaie; Xiaoting Liang; Musa Karakus; Jun Wei

2005-12-01T23:59:59.000Z

188

REFRACTORY FOR BLACK LIQUOR GASIFIERS  

SciTech Connect (OSTI)

The University of Missouri-Rolla will identify materials that will permit the safe, reliable and economical operation of combined cycle gasifiers by the pulp and paper industry. The primary emphasis of this project will be to resolve the materials problems encountered during the operation of low-pressure high-temperature (LFHT) and low-pressure low-temperature (LPLT) gasifiers while simultaneously understanding the materials barriers to the successful demonstration of high-pressure high-temperature (HPHT) black liquor gasifiers. This study will define the chemical, thermal and physical conditions in current and proposed gasifier designs and then modify existing materials and develop new materials to successfully meet the formidable material challenges. Resolving the material challenges of black liquor gasification combined cycle technology will provide energy, environmental, and economic benefits that include higher thermal efficiencies, up to three times greater electrical output per unit of fuel, and lower emissions. In the near term, adoption of this technology will allow the pulp and paper industry greater capital effectiveness and flexibility, as gasifiers are added to increase mill capacity. In the long term, combined-cycle gasification will lessen the industry's environmental impact while increasing its potential for energy production, allowing the production of all the mill's heat and power needs along with surplus electricity being returned to the grid. An added benefit will be the potential elimination of the possibility of smelt-water explosions, which constitute an important safety concern wherever conventional Tomlinson recovery boilers are operated. Developing cost-effective materials with improved performance in gasifier environments may be the best answer to the material challenges presented by black liquor gasification. Refractory materials may be selected/developed that either react with the gasifier environment to form protective surfaces in-situ; are functionally-graded to give the best combination of thermal, mechanical, and physical properties and chemical stability; or are relatively inexpensive, reliable repair materials. Material development will be divided into 2 tasks: Task 1, Development and property determinations of improved and existing refractory systems for black liquor containment. Refractory systems of interest include magnesia aluminate and baria aluminate spinels for binder materials, both dry and hydratable, and materials with high alumina contents, 85-95 wt%, aluminum oxide, 5.0-15.0 wt%, and BaO, SrO, CaO, ZrO and SiC. Task 2, Finite element analysis of heat flow and thermal stress/strain in the refractory lining and steel shell of existing and proposed vessel designs. Stress and strain due to thermal and chemical expansion has been observed to be detrimental to the lifespan of existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment materials.

William L. Headrick Jr.; Alireza Rezaie

2003-12-01T23:59:59.000Z

189

Refractory for Black Liquor Gasifiers  

SciTech Connect (OSTI)

The University of Missouri-Rolla will identify materials that will permit the safe, reliable and economical operation of combined cycle gasifiers by the pulp and paper industry. The primary emphasis of this project will be to resolve the materials problems encountered during the operation of low-pressure high-temperature (LFHT) and low-pressure low-temperature (LPLT) gasifiers while simultaneously understanding the materials barriers to the successful demonstration of high-pressure high-temperature (HPHT) black liquor gasifiers. This study will define the chemical, thermal and physical conditions in current and proposed gasifier designs and then modify existing materials and develop new materials to successfully meet the formidable material challenges. Resolving the material challenges of black liquor gasification combined cycle technology will provide energy, environmental, and economic benefits that include higher thermal efficiencies, up to three times greater electrical output per unit of fuel, and lower emissions. In the near term, adoption of this technology will allow the pulp and paper industry greater capital effectiveness and flexibility, as gasifiers are added to increase mill capacity. In the long term, combined-cycle gasification will lessen the industry's environmental impact while increasing its potential for energy production, allowing the production of all the mill's heat and power needs along with surplus electricity being returned to the grid. An added benefit will be the potential elimination of the possibility of smelt-water explosions, which constitute an important safety concern wherever conventional Tomlinson recovery boilers are operated. Developing cost-effective materials with improved performance in gasifier environments may be the best answer to the material challenges presented by black liquor gasification. Refractory materials may be selected/developed that either react with the gasifier environment to form protective surfaces in-situ; are functionally-graded to give the best combination of thermal, mechanical, and physical properties and chemical stability; or are relatively inexpensive, reliable repair materials. Material development will be divided into 2 tasks: Task 1, Development and property determinations of improved and existing refractory systems for black liquor containment. Refractory systems of interest include magnesia aluminate and baria aluminate spinels for binder materials, both dry and hydratable, and materials with high alumina contents, 85-95 wt%, aluminum oxide, 5.0-15.0 wt%, and BaO, SrO, CaO, ZrO and SiC. Task 2, Finite element analysis of heat flow and thermal stress/strain in the refractory lining and steel shell of existing and proposed vessel designs. Stress and strain due to thermal and chemical expansion has been observed to be detrimental to the lifespan of existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment materials.

William L. Headrick Jr; Alireza Rezaie

2003-08-01T23:59:59.000Z

190

Refractory for Black Liquor Gasifiers  

SciTech Connect (OSTI)

The University of Missouri-Rolla will identify materials that will permit the safe, reliable and economical operation of combined cycle gasifiers by the pulp and paper industry. The primary emphasis of this project will be to resolve the materials problems encountered during the operation of low-pressure high-temperature (LFHT) and low-pressure low-temperature (LPLT) gasifiers while simultaneously understanding the materials barriers to the successful demonstration of high-pressure high-temperature (HPHT) black liquor gasifiers. This study will define the chemical, thermal and physical conditions in current and proposed gasifier designs and then modify existing materials and develop new materials to successfully meet the formidable material challenges. Resolving the material challenges of black liquor gasification combined cycle technology will provide energy, environmental, and economic benefits that include higher thermal efficiencies, up to three times greater electrical output per unit of fuel, and lower emissions. In the near term, adoption of this technology will allow the pulp and paper industry greater capital effectiveness and flexibility, as gasifiers are added to increase mill capacity. In the long term, combined-cycle gasification will lessen the industry's environmental impact while increasing its potential for energy production, allowing the production of all the mill's heat and power needs along with surplus electricity being returned to the grid. An added benefit will be the potential elimination of the possibility of smelt-water explosions, which constitute an important safety concern wherever conventional Tomlinson recovery boilers are operated. Developing cost-effective materials with improved performance in gasifier environments may be the best answer to the material challenges presented by black liquor gasification. Refractory materials may be selected/developed that either react with the gasifier environment to form protective surfaces in-situ; are functionally-graded to give the best combination of thermal, mechanical, and physical properties and chemical stability; or are relatively inexpensive, reliable repair materials. Material development will be divided into 2 tasks: Task 1, Development and property determinations of improved and existing refractory systems for black liquor containment. Refractory systems of interest include magnesia aluminate and baria aluminate spinels for binder materials, both dry and hydratable, and materials with high alumina contents, 85-95 wt%, aluminum oxide, 5.0-15.0 wt%, and BaO, SrO, CaO, ZrO and SiC. Task 2, Finite element analysis of heat flow and thermal stress/strain in the refractory lining and steel shell of existing and proposed vessel designs. Stress and strain due to thermal and chemical expansion has been observed to be detrimental to the lifespan of existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment materials.

Robert E. Moore; William L. Headrick; Alireza Rezaie

2003-03-31T23:59:59.000Z

191

Black Hole Superradiance in Dynamical Spacetime  

E-Print Network [OSTI]

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

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

2014-03-14T23:59:59.000Z

192

NETL: News Release - DOE's Fossil Energy Program Provides 10th Year of  

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

May 4, 2001 May 4, 2001 DOE's Fossil Energy Program Provides 10th Year of Research Support to Historically Black Colleges and Universities and Other Minority Institutions PITTSBURGH, PA - With new projects to study microbes that can boost oil recovery to advanced ways of providing high-purity hydrogen for fuel cells, the U.S. Department of Energy's Office of Fossil Energy commemorates its 10th year of research support for Historically Black Colleges and Universities and other minority institutions this week with seven new grants. For the last decade, the department's fossil energy program has provided almost $1 million each year specifically to give blacks and other minority students hands-on experience in conducting science and energy research. This year, another $1 million will go to seven institutions for a wide range of projects that tackle many of the nation's major energy concerns - from generating reliable, clean electricity to producing more crude oil and natural gas from domestic fields.

193

Age and growth of black drum (Pogonias cromis Linneaus) from Galveston Bay  

E-Print Network [OSTI]

for black drum ranging from 140 to 400 mm standard length and 1 to 3 years old. Nean standard length for drum at age 1, 2 and 3 was 182, 283 and 369 ms, respectively. Tne theoretical growth equation developed for black drum through age was lt = 640(1 ? e... 0. 2783(t+0. 1562) ]. Standard and total length-weight relationships were log W = 2. 939 log SL - 4. 24 and log W = 3. 038 log TL ? 4. 958, respectively. The relatzonship of standard length to total length was TL = 13. 199 + 1. 209 SL. Results...

Massey, Julie Kay

2012-06-07T23:59:59.000Z

194

Secretary Moniz's First Year  

Broader source: Energy.gov [DOE]

Check out our new interactive timeline to recap top moments from Energy Secretary Ernest Moniz's first year in office.

195

Secretary Moniz's First Year  

Broader source: Energy.gov [DOE]

We're looking back at some of the biggest moments from Energy Secretary Ernest Moniz's first year in office.

196

The black hole challenge in Randall-Sundrum II model  

E-Print Network [OSTI]

Models postulating the existence of additional spacelike dimensions of macroscopic or even infinite size, while viewing our observable universe as merely a 3-brane living in a higher-dimensional bulk were a major breakthrough when proposed some 15 years ago. The most interesting among them both in terms of elegance of the setup and of the richness of the emerging phenomenology is the Randall-Sundrum II model where one infinite extra spacelike dimension is considered with an AdS topology, characterized by the warping effect caused by the presence of a negative cosmological constant in the bulk. A major drawback of this model is that despite numerous efforts no line element has ever been found that could describe a stable, regular, realistic black hole. Finding a smoothly behaved such solution supported by the presence of some more or less conventional fields either in the bulk and/or on the brane is the core of the black hole challenge. After a comprehensive presentation of the details of the model and the analysis of the significance and the utility of getting a specific analytic black hole solution, several (unsuccessful) analytic and numerical approaches to the problem developed over the years are presented with some discussion about their results. The chapter closes with the latest numerical results that actually consists a major advancement in the effort to address the challenge, the presentation of the most recent analytic work trying (and unfortunately failing) to build a solution assuming the existence of unconventional scalar fields and some ideas about the routes the forthcoming analytic approaches should explore.

Nikolaos D. Pappas

2014-09-02T23:59:59.000Z

197

Black Hole Evaporation in an Expanding Universe  

E-Print Network [OSTI]

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

Hiromi Saida; Tomohiro Harada; Hideki Maeda

2007-05-28T23:59:59.000Z

198

Year 1 Year 2 Anne 3 Anne 4 Year 5 Year 6 Year 7Year 3 Year 4 INGENIEUR POLYTECHNICIENINGENIEUR POLYTECHNICIEN  

E-Print Network [OSTI]

: Biology / Chemistry / Computer Science / Economics / Energy / Mechanics and Environmental Sciences / Mathematics and Applied Mathematics / Physics / Science, Technology & Society / Software Systems / Innovation Duration: 2 years - Possibility to be directly admitted to Year 2 Master of ScienceMaster of Science #12

Cengarle, María Victoria

199

CHARYBDIS: A Black hole event generator.  

E-Print Network [OSTI]

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

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

200

Tunable optical properties of multilayers black phosphorus  

E-Print Network [OSTI]

We calculated the optical conductivity tensor of multilayers black phosphorus using the Kubo formula within an effective low-energy Hamiltonian. The optical absorption spectra of multilayers black phosphorus are shown to vary sensitively with thickness, doping, and light polarization. In conjunction with experimental spectra obtained from infrared absorption spectroscopy, we discuss the role of interband coupling and disorder on the observed anisotropic absorption spectra. Multilayers black phosphorus might offer attractive alternatives to narrow gap compound semiconductors for optoelectronics across mid- to near-infrared frequencies.

Low, Tony; Carvalho, A; Jiang, Yongjin; Wang, Han; Xia, Fengnian; Neto, A H Castro

2014-01-01T23:59:59.000Z

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


201

Some remarks on black hole thermodynamics  

E-Print Network [OSTI]

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

R. Y. Chiao

2010-12-27T23:59:59.000Z

202

Chaotic string-capture by black hole  

Science Journals Connector (OSTI)

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

A L Larsen

1994-01-01T23:59:59.000Z

203

Phase transitions and Geometrothermodynamics of Regular black holes  

E-Print Network [OSTI]

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

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

2014-06-16T23:59:59.000Z

204

Reclaiming Blackness: (Counter) Narratives of Racial Kinship in Black Gay Men‘s Sexual Stories  

E-Print Network [OSTI]

and Prevention CME Christian Methodist Episcopal church DL Down Low GLBT Gay, Lesbian, Bisexual and Transgendered HIV Human Immunodeficiency Virus MCC Metropolitan Community Church MSM Men Who Have Sex with Men NCBLG National Coalition of Black Lesbians... and Gays SBM Super Black Man SGL Same Gender Loving STDs Sexually Transmitted Diseases The Forum National Black Gay and Lesbian Leadership Forum TVC Traditional Values Coalition x TABLE OF CONTENTS Page ABSTRACT...

Chambers, Christopher Scott

2012-07-16T23:59:59.000Z

205

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

SciTech Connect (OSTI)

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

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

2008-05-15T23:59:59.000Z

206

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

E-Print Network [OSTI]

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

Yun Soo Myung

2007-12-20T23:59:59.000Z

207

0 60 120 180 240 300 360 Day of Year  

E-Print Network [OSTI]

is expanded to any user-specified number of bands between 400 and 2500 nm. Several external models and sensors with earth observation data obtained from a range of different sensors, including AVHRR, SeaWifs, MODIS, (A spruce, solar zenith angle 45°. The effect of solar zenith angle on surface albedo will be amended

208

T-602: BlackBerry Enterprise Server Input Validation Flaw in BlackBerry Web  

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

02: BlackBerry Enterprise Server Input Validation Flaw in 02: BlackBerry Enterprise Server Input Validation Flaw in BlackBerry Web Desktop Manager Permits Cross-Site Scripting Attacks T-602: BlackBerry Enterprise Server Input Validation Flaw in BlackBerry Web Desktop Manager Permits Cross-Site Scripting Attacks April 14, 2011 - 5:07am Addthis PROBLEM: BlackBerry Enterprise Server Input Validation Flaw in BlackBerry Web Desktop Manager Permits Cross-Site Scripting Attacks PLATFORM: BlackBerry Enterprise Server Express versions 5.0.1 and 5.0.2 for Microsoft Exchange, 5.0.2 for IBM Lotus Domino, 5.0.0 through 5.0.3 for Microsoft Exchange and IBM Lotus Domino, and version 5.0.1 for Novell GroupWise. OS Platform(s): Windows (2000), Windows (2003), Windows (2008) ABSTRACT: The BlackBerry Web Desktop Manager not properly filter HTML code from

209

Thermodynamics and evaporation of the noncommutative black hole  

E-Print Network [OSTI]

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

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

2006-11-24T23:59:59.000Z

210

Centennial black carbon turnover observed in a Russia steppe soil  

SciTech Connect (OSTI)

Black carbon (BC), from incomplete combustion of fuels and biomass, has been considered highly recalcitrant and a substantial sink for carbon dioxide. Recent studies have shown that BC can be degraded in soils. We use two soils with very low spatial variability sampled 100 years apart in a Russian steppe preserve to generate the first whole-profile estimate of BC stocks and turnover in the field. Quantities of fire residues in soil changed significantly over a century. Black carbon stock was 2.5 kg m{sup -2}, or about 7-10% of total organic C in 1900. With cessation of biomass burning, BC stocks decreased 25% over a century, which translates into a centennial soil BC turnover (293 years best estimate; range 182-541 years), much faster than so-called inert or passive carbon in ecosystem models. The turnover time presented here is for loss by all processes, namely decomposition, leaching, and erosion, although the latter two were probably insignificant in this case. Notably, at both time points, the peak BC stock was below 30 cm, a depth interval, which is not typically accounted for. Also, the quality of the fire residues changed with time, as indicated by the use benzene poly carboxylic acids (BPCA) as molecular markers. The proportions of less-condensed (and thus more easily degradable) BC structures decreased, whereas the highly condensed (and more recalcitrant) BC structures survived unchanged over the 100-year period. Our results show that BC cannot be assumed chemically recalcitrant in all soils, and other explanations for very old soil carbon are needed.

Hammes, K.; Torn, M.S.; Lapenas, A.G.; Schmidt, M.W.I.

2008-09-15T23:59:59.000Z

211

BLACK ENGLISH AND THE AMERICAN VALUE SYSTEM  

E-Print Network [OSTI]

The strategy of enlightened bi-dialectalism used by the schools in the United States to deal with the problem of Black English is a significant attempt at social engineering. This attempt is motivated by basic linguistic ...

Drake, Glendon F.

1973-10-01T23:59:59.000Z

212

Conserved quantities in a black hole collision  

E-Print Network [OSTI]

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

S. Dain; J. A. Valiente-Kroon

2001-05-28T23:59:59.000Z

213

Ethnic identification among blacks and whites  

E-Print Network [OSTI]

Two central questions drive this research: (1) Are there trends in ethnic identification among blacks and whites; and (2) Are there meaningful differences between groups that identify differently? I use descriptive and regression analysis...

Glass, Teresa Gail

1996-01-01T23:59:59.000Z

214

Spectral line broadening in magnetized black holes  

E-Print Network [OSTI]

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

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

2014-05-02T23:59:59.000Z

215

black out | OpenEI Community  

Open Energy Info (EERE)

the grid? black out brown out bulk power system electricity grid future grid grid history security Smart Grid transmission We all rely on it but what do you really know about our...

216

Energy of 4-Dimensional Black Hole, etc  

E-Print Network [OSTI]

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

Dmitriy Palatnik

2011-07-18T23:59:59.000Z

217

Horizon Operator Approach to Black Hole Quantization  

E-Print Network [OSTI]

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

G. 't Hooft

1994-02-21T23:59:59.000Z

218

Allocation Year Rollover  

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

Allocation Year Rollover Allocation Year Rollover Allocation Year Rollover: 2013 to 2014 Note: Allocation Year 2013 (AY13) ends at 23:59:59 on Monday, January 13, 2014. AY14 runs from Tuesday, January 14, 2014 through Monday, January 12, 2015. Below are major changes that will go into effect with the beginning of AY14 on Tuesday, January 14, 2014. All times listed are PST. Scheduled System Downtimes There will be no service disruption during the allocation year rollover this year. Interactive and batch use will continue uninterrupted (except for "premium" jobs on Hopper; see below). Charging Across AY Boundary All batch jobs will continue running during the rollover. Time accrued before midnight will be charged to AY13 repos; time accrued after midnight will be charged to AY14 repos. Running batch jobs that are associated with

219

Jordan Algebras and Extremal Black Holes  

E-Print Network [OSTI]

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

Michael Rios

2007-03-27T23:59:59.000Z

220

The structure of the carbon black flame  

E-Print Network [OSTI]

THE STRUCTURE OF THE CARBON BLACK FLAME A Dissertation By W1 111 ami Kermit Anderson THEHSR UCOF Approval as to style and content recommended Head of tiie Department of Chemistry A Dissertation Submitted to the Faculty of the Agricultural... and Mechanical College of. Texas in Parti ail Fulfilment of the Requirements for the Degree of Doctor of Philosophy THE STRUCTURE OF THE CARBON BLACK FLAME Major Subject: Chemistry AB William Hermit Anderson:\\ t * August 1945 THE STRUCTURE OF THE. CARBON...

Anderson, W. Kermi

1945-01-01T23:59:59.000Z

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


221

Black hole entropy and higher curvature interactions  

Science Journals Connector (OSTI)

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

Ted Jacobson and Robert C. Myers

1993-06-14T23:59:59.000Z

222

Electromagnetic Beams Overpass the Black Hole Horizon  

E-Print Network [OSTI]

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

Alexander Burinskii

2008-06-16T23:59:59.000Z

223

Initial data for black hole evolutions  

E-Print Network [OSTI]

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

Harald P. Pfeiffer

2005-10-04T23:59:59.000Z

224

Applied Science and Technology Task Order Fiscal Year 2008 Year...  

Energy Savers [EERE]

8 Year-End Summary Report Applied Science and Technology Task Order Fiscal Year 2008 Year-End Summary Report Applied Science and Technology Task Order Fiscal Year 2008 Year-End...

225

Applied Science and Technology Task Order Fiscal Year 2009 Year...  

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

9 Year-End Summary Report Applied Science and Technology Task Order Fiscal Year 2009 Year-End Summary Report Applied Science and Technology Task Order Fiscal Year 2009 Year-End...

226

Applied Science and Technology Task Order Fiscal Year 2010 Year...  

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

0 Year-End Summary Report Applied Science and Technology Task Order Fiscal Year 2010 Year-End Summary Report Applied Science and Technology Task Order Fiscal Year 2010 Year-End...

227

Applied Science and Technology Task Order Fiscal Year 2011 Year...  

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

1 Year-End Summary Report Applied Science and Technology Task Order Fiscal Year 2011 Year-End Summary Report Applied Science and Technology Task Order Fiscal Year 2011 Year-End...

228

Project Year Project Team  

E-Print Network [OSTI]

design goals for this project include low cost (less than $30 per paddle) and robustness. The projectProject Year 2001 Project Team Faculty: Allison Okamura, Mechanical Engineering, Whiting School Project Title Haptic Display of Dynamic Systems Audience 30 to 40 students per year, enrolled

Gray, Jeffrey J.

229

Project Year Project Team  

E-Print Network [OSTI]

-year section of the summer project will cost $1344.) This project will be measured by the CER surveys conductedProject Year 2005 Project Team Sean Greenberg, Faculty, Philosophy Department, Krieger School of Arts & Sciences; Kevin Clark, Student, Philosophy Department, Krieger School of Arts & Sciences Project

Gray, Jeffrey J.

230

Black Carbon’s Properties and Role in the Environment: A Comprehensive Review  

E-Print Network [OSTI]

H. Can reducing black carbon emissions counteract globalinventory of black carbon emissions. Atmos. Environ. 1993,commonly studied form of carbon emissions. Black carbon (BC)

Shrestha, Gyami

2010-01-01T23:59:59.000Z

231

Previous Year Awards  

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

Awards Awards Previous Year Awards 2013 Allocation Awards This page lists the allocation awards for NERSC for the 2013 allocation year (Jan 8, 2013 through Jan 13, 2014). Read More » NERSC Initiative for Scientific Exploration (NISE) 2013 Awards NISE is a mechanism used for allocating the NERSC reserve (10% of the total allocation). In 2013 we made the second year of the two-year awards made in 2012, supplemented by projects selected by the NERSC director. Read More » Data Intensive Computing Pilot Program 2012/2013 Awards NERSC's new data-intensive science pilot program is aimed at helping scientists capture, analyze and store the increasing stream of scientific data coming out of experiments, simulations and instruments. Read More » 2012 Allocation Awards This page lists the allocation awards for NERSC for the 2012 allocation

232

Project Year Project Team  

E-Print Network [OSTI]

Project Year 2002 Project Team Faculty: Louise Pasternack, Chemistry Department, Krieger School, Krieger School of Arts & Sciences Project Title Introductory Chemistry Lab Demonstrations Audience an interactive virtual lab manual that will facilitate understanding of the procedures and techniques required

Gray, Jeffrey J.

233

Black Hole Evaporation in an Expanding Universe  

E-Print Network [OSTI]

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

Saida, Hiromi; Maeda, Hideki

2007-01-01T23:59:59.000Z

234

Cemex Black Mountain Quarry | Open Energy Information  

Open Energy Info (EERE)

Mountain Quarry Mountain Quarry Jump to: navigation, search Name Cemex Black Mountain Quarry Facility Cemex Black Mountain Quarry Sector Wind energy Facility Type Community Wind Facility Status In Service Owner Foundation Windpower Developer Foundation Windpower Energy Purchaser Cemex Black Mountain Quarry Location Apple Valley CA Coordinates 34.622028°, -117.111833° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":34.622028,"lon":-117.111833,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

235

Probing black holes with constellation-X  

Science Journals Connector (OSTI)

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

Kimberly A. Weaver

2001-01-01T23:59:59.000Z

236

Black Hole Complementarity in Gravity's Rainbow  

E-Print Network [OSTI]

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

Gim, Yongwan

2015-01-01T23:59:59.000Z

237

Nonperturbative black hole entropy and Kloosterman sums  

E-Print Network [OSTI]

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

Dabholkar, Atish; Murthy, Sameer

2014-01-01T23:59:59.000Z

238

The AGN Black Hole Mass Database  

E-Print Network [OSTI]

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

Bentz, Misty C

2014-01-01T23:59:59.000Z

239

Thermodynamics of Lovelock-Lifshitz black branes  

SciTech Connect (OSTI)

We investigate the thermodynamics of Lovelock-Lifshitz black branes. We begin by introducing the finite action of third order Lovelock gravity in the presence of a massive vector field for a flat boundary, and use it to compute the energy density of these black branes. Using the field equations, we find a conserved quantity along the r coordinate that relates the metric parameters at the horizon and at infinity. Remarkably, though the subleading large-r behavior of Lovelock-Lifshitz black branes differs substantively from their Einsteinian Lifshitz counterparts, we find that the relationship between the energy density, temperature, and entropy density is unchanged from Einsteinian gravity. Using the first law of thermodynamics to obtain the relationship between entropy and temperature, we find that it too is the same as the Einsteinian case, apart from a constant of integration that depends on the Lovelock coefficients.

Dehghani, M. H. [Department of Physics and Astronomy, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, N2L 3G1 (Canada); Physics Department and Biruni Observatory, College of Sciences, Shiraz University, Shiraz 71454 (Iran, Islamic Republic of); Mann, R. B. [Department of Physics and Astronomy, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, N2L 3G1 (Canada)

2010-09-15T23:59:59.000Z

240

Black hole chromosphere at the CERN LHC  

Science Journals Connector (OSTI)

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

Luis Anchordoqui and Haim Goldberg

2003-03-26T23:59:59.000Z

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


241

Black Warrior Geothermal Area | Open Energy Information  

Open Energy Info (EERE)

Black Warrior Geothermal Area Black Warrior Geothermal Area Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermal Resource Area: Black Warrior Geothermal Area Contents 1 Area Overview 2 History and Infrastructure 3 Regulatory and Environmental Issues 4 Exploration History 5 Well Field Description 6 Geology of the Area 7 Geofluid Geochemistry 8 NEPA-Related Analyses (0) 9 Exploration Activities (8) 10 References Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"TERRAIN","zoom":6,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"300px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":39.9,"lon":-119.22,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

242

Extremal limits and black hole entropy  

E-Print Network [OSTI]

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

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

2009-01-08T23:59:59.000Z

243

Strings as solitons & black holes as strings  

Science Journals Connector (OSTI)

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

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

1996-01-01T23:59:59.000Z

244

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

E-Print Network [OSTI]

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

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

2004-06-29T23:59:59.000Z

245

Green is the new black | Y-12 National Security Complex  

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

Green is the new black Green is the new black Posted: September 9, 2013 - 2:47pm Environmental stakeholders from across the state meet at the New Hope Center for the Tennessee...

246

What is the topology of a Schwarzschild black hole?  

E-Print Network [OSTI]

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

Edmundo M. Monte

2011-11-24T23:59:59.000Z

247

Chapter 3 Topology and Uniqueness of Higher Dimensional Black Holes  

Science Journals Connector (OSTI)

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

Daisuke Ida; Akihiro Ishibashi; Tetsuya Shiromizu

2011-06-01T23:59:59.000Z

248

Ecology and breeding biology of the Black-shouldered Kite in south Texas  

E-Print Network [OSTI]

), as well as more detailed studies of reproductive behavior (Watson 1940), food habits (Waian and Stendell 1970, Stendell and Myers 1973), and foraging behavior (Warner and Rudd 1975). However, information regarding the Texas population is scarce..., Arkansas, Alabama, Georgia, and Minnesota which further documented the species' range expansion. Some reports suggest that Black-shouldered Kites may pair for life and may nest in the same area each year (Watson 1940, Hawbecker 1942). However, other...

Carrie, Dawn Kristine

2012-06-07T23:59:59.000Z

249

How red is a quantum black hole?  

E-Print Network [OSTI]

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

Viqar Husain; Oliver Winkler

2005-05-30T23:59:59.000Z

250

CHARYBDIS: A Black Hole Event Generator  

E-Print Network [OSTI]

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

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

2003-07-24T23:59:59.000Z

251

BLACK HOLE ENTROPY IN HIGHER CURVATURE GRAVITY  

E-Print Network [OSTI]

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

TED JACOBSON; GUNGWON KANG; ROBERT C. MYERS

1995-02-27T23:59:59.000Z

252

Quasilocal first law for black hole thermodynamics  

Science Journals Connector (OSTI)

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

Ernesto Frodden; Amit Ghosh; Alejandro Perez

2013-06-24T23:59:59.000Z

253

Isotope Biogeochemistry of Diagenesis caused by a Black  

E-Print Network [OSTI]

the coasts of Surinam and French Guyana #12;µ Black shales in Leg 207 sediments and pore water response depth

254

Thought Experiment to resolve the Black Hole Information Paradox  

E-Print Network [OSTI]

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

Kay zum Felde

2014-07-22T23:59:59.000Z

255

Particles and scalar waves in noncommutative charged black hole spacetime  

E-Print Network [OSTI]

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

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

2015-01-01T23:59:59.000Z

256

Binary Black Hole Accretion Flows From a Misaligned Circumbinary Disk  

Science Journals Connector (OSTI)

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

Kimitake Hayasaki; Hideki Saito; Shin Mineshige

2013-08-25T23:59:59.000Z

257

Emission of scalar particles from cylindrical black holes  

E-Print Network [OSTI]

We study quantum tunneling of scalar particles from black strings. For this purpose we apply WKB approximation and Hamilton-Jacobi method to solve the Klein-Gordon equation for outgoing trajectories. We find the tunneling probability of outgoing charged and uncharged scalars from the event horizon of black strings, and hence the Hawking temperature for these black configurations.

H. Gohar; K. Saifullah

2011-09-27T23:59:59.000Z

258

Project Year Project Title  

E-Print Network [OSTI]

operators, matrix indexing, vector computations, loops, functions, and plotting graphs, among others basic arithmetic operators, matrix indexing, and vector computations in MATLAB. After creatingProject Year 2011-2012 Project Title Online Tutorial for MATLAB Project Team Eileen Haase, Whiting

Gray, Jeffrey J.

259

Project Year Project Team  

E-Print Network [OSTI]

Project Year 2005 Project Team Krysia Hudson, Faculty, School of Nursing, Undergraduate Instruction for Educational Resources Project Title Enhanced Web-based Learning Environments for Beginning Nursing Students (e.g., demonstrations of procedures or tasks) into the WBL systems, it will be possible to increase

Gray, Jeffrey J.

260

Project Year Project Title  

E-Print Network [OSTI]

that incorporate video taped procedures for student preview. Solution This project will create videos for more to study the procedure and techniques before coming to class. Our previous fellowship project addressedProject Year 2009 Project Title Enhancing Biology Laboratory Preparation through Video

Gray, Jeffrey J.

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


261

Project Year Project Team  

E-Print Network [OSTI]

, there is no resource available to view the procedure before class. Solution The purpose of this project is to capture available to view the procedure before class. The purpose #12;of this project is to capture variousProject Year 2007 Project Team Kristina Obom, Faculty, Advanced Academic Programs, Krieger School

Gray, Jeffrey J.

262

Project Year Project Team  

E-Print Network [OSTI]

Project Year 2002 Project Team Faculty: Michael McCloskey, Cognitive Science/Neuroscience, Krieger of Arts & Sciences Project Title Cognitive Neuropsychology Audience The initial audience to access. The current procedure calls for individual students or researchers to contact the faculty member

Gray, Jeffrey J.

263

Project Year Project Title  

E-Print Network [OSTI]

Project Year 2011-2012 Project Title Using M-Health and GIS Technology in the Field to Improve into teams and having each team use a different m-health data collection tool (e.g., cellular phones, smart health patterns. The Tech Fellow, Jacqueline Ferguson, will assist in creating an m-health project

Gray, Jeffrey J.

264

Project Year Project Team  

E-Print Network [OSTI]

Project Year 2002 Project Team Faculty: Gregory Hager, Computer Science, Whiting School of Engineering Fellow: Alan Chen, Biomedical Engineering, Whiting School of Engineering Project Title Robotics is complicated, time-consuming, and costly, making a robot for an introductory-level class is not practical

Gray, Jeffrey J.

265

Project Year Project Title  

E-Print Network [OSTI]

the cost of the project to labor only. The efficacy of the examples will be assessed through their useProject Year 2012-2013 Project Title Sight-Reading at the Piano Project Team Ken Johansen, Peabody) Faculty Statement The goal of this project is to create a bank of practice exercises that student pianists

Gray, Jeffrey J.

266

Project Year Project Title  

E-Print Network [OSTI]

Project Year 2013-2014 Project Title German Online Placement Exam Project Team Deborah Mifflin to increased cost. As well, it lacked listening comprehension, writing and speaking components providing support, we will use Blackboard for this project. The creation will require numerous steps

Gray, Jeffrey J.

267

Project Year Spring 2009  

E-Print Network [OSTI]

Project Year Spring 2009 Project Title A Database of Film and Media History and Aesthetics Part 2 experience with colleagues, they were eager to participate in expanding the database to include clips or they simply don't have the time, or both. Solution: The development of a user-friendly database of clips would

Gray, Jeffrey J.

268

Hanford Site Black-Tailed Jackrabbit Monitoring Report for Fiscal Year 2013  

SciTech Connect (OSTI)

The U.S. Department of Energy, Richland Operations Office (DOE-RL) conducts ecological monitoring on the Hanford Site to collect and track data needed to ensure compliance with an array of environmental laws, regulations, and policies governing DOE activities. Ecological monitoring data provide baseline information about the plants, animals, and habitat under DOE-RL stewardship at Hanford required for decision-making under the National Environmental Policy Act (NEPA) and Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). The Hanford Site Comprehensive Land Use Plan (CLUP, DOE/EIS-0222-F) which is the Environmental Impact Statement for Hanford Site activities, helps ensure that DOE-RL, its contractors, and other entities conducting activities on the Hanford Site are in compliance with NEPA.

Lindsey, Cole T.; Nugent, John J.; Wilde, Justin W.; Johnson, Scott J.

2014-02-13T23:59:59.000Z

269

Black Engineering of the Year Awards and STEM Conference Career Fair  

Broader source: Energy.gov [DOE]

Location:  Washington Marriott Wardman Park, 2660 Woodley Road, NW, Washington, DC 20008Website Link:  http://bit.ly/1CbVvraPOC:  Dameone Ferguson (NNSA)

270

Black Warrior Geothermal Area | Open Energy Information  

Open Energy Info (EERE)

Black Warrior Geothermal Area Black Warrior Geothermal Area (Redirected from Black Warrior Area) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermal Resource Area: Black Warrior Geothermal Area Contents 1 Area Overview 2 History and Infrastructure 3 Regulatory and Environmental Issues 4 Exploration History 5 Well Field Description 6 Geology of the Area 7 Geofluid Geochemistry 8 NEPA-Related Analyses (0) 9 Exploration Activities (8) 10 References Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"TERRAIN","zoom":6,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"300px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":39.9,"lon":-119.22,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

271

Geodesic study of a charged black hole  

E-Print Network [OSTI]

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

Mehedi Kalam; Nur Farhad; Sk. Monowar Hossein

2013-03-17T23:59:59.000Z

272

Black Holes and Sub-millimeter Dimensions  

E-Print Network [OSTI]

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

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

1998-01-01T23:59:59.000Z

273

Retarded cores, black holes and galaxy formation  

Science Journals Connector (OSTI)

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

John Gribbin

1974-12-06T23:59:59.000Z

274

Schwarzschild black hole in dark energy background  

E-Print Network [OSTI]

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

Ngangbam Ishwarchandra; Ng. Ibohal; K. Yugindro Singh

2014-09-27T23:59:59.000Z

275

Supermassive Black Hole Binaries: The Search Continues  

E-Print Network [OSTI]

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

Tamara Bogdanovic

2014-06-19T23:59:59.000Z

276

Chapter 8 Black Holes in Braneworld Models  

Science Journals Connector (OSTI)

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

Norihiro Tanahashi; Takahiro Tanaka

2011-06-01T23:59:59.000Z

277

SS433—a massive black hole?  

Science Journals Connector (OSTI)

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

R. J. TERLEVICH; J. E. PRINGLE

1979-04-19T23:59:59.000Z

278

Black Holes in 4 Nearby Radio Galaxies  

E-Print Network [OSTI]

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

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

2014-01-01T23:59:59.000Z

279

Through the years  

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

Through the years Through the years Early 1960s Researchers at PNL (now called PNNL) developed the standards and devices for setting and measuring radiation doses received by nuclear industry work- ers. Tens of thousands of people, including children, have been mea- sured by whole-body counters since the 1960s to relate their physical content of radioactive materials to sources such as food and water. 1960s PNL formulated the first use of a digital computer for complete process control of a mass spectrometer. Mid-1960s PNL devised a computer code, called COBRA for COolant Boiling in Rod Arrays, which allowed for three-dimensional, multiphase hydrothermal modeling of reactor and other complex systems. 1967 PNL researchers continued the fundamental scientific and

280

Savannah River National Laboratory Meets with Historically Black Colleges  

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

Savannah River National Laboratory Meets with Historically Black Savannah River National Laboratory Meets with Historically Black Colleges and Universities Savannah River National Laboratory Meets with Historically Black Colleges and Universities February 1, 2013 - 9:00am Addthis South Carolina State University students William Dumpson, left, and Alejandra Chirino, center, talk with Savannah River National Laboratory Director Dr. Terry Michalske at a recent research exchange involving the laboratory and seven historically black colleges and universities. South Carolina State University students William Dumpson, left, and Alejandra Chirino, center, talk with Savannah River National Laboratory Director Dr. Terry Michalske at a recent research exchange involving the laboratory and seven historically black colleges and universities.

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


281

Black Hills Energy (Gas) - Residential New Construction Rebate Program |  

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

Black Hills Energy (Gas) - Residential New Construction Rebate Black Hills Energy (Gas) - Residential New Construction Rebate Program Black Hills Energy (Gas) - Residential New Construction Rebate Program < Back Eligibility Construction Residential Savings Category Appliances & Electronics Heating & Cooling Home Weatherization Construction Commercial Weatherization Commercial Heating & Cooling Design & Remodeling Other Program Info State Iowa Program Type Utility Rebate Program Rebate Amount Builder Incentive: $800 - $2300 Provider Black Hills Energy Black Hills Energy offers new construction rebates for home builders in the eligible service area. Rebates between $800 and $5,000 are available for a range of efficiency measures incorporated into home construction. Qualifying homes must use natural gas and meet the minimum efficiency

282

Savannah River National Laboratory Meets with Historically Black Colleges  

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

Savannah River National Laboratory Meets with Historically Black Savannah River National Laboratory Meets with Historically Black Colleges and Universities Savannah River National Laboratory Meets with Historically Black Colleges and Universities February 1, 2013 - 9:00am Addthis South Carolina State University students William Dumpson, left, and Alejandra Chirino, center, talk with Savannah River National Laboratory Director Dr. Terry Michalske at a recent research exchange involving the laboratory and seven historically black colleges and universities. South Carolina State University students William Dumpson, left, and Alejandra Chirino, center, talk with Savannah River National Laboratory Director Dr. Terry Michalske at a recent research exchange involving the laboratory and seven historically black colleges and universities.

283

Geodesics and Geodesic Deviation in static Charged Black Holes  

E-Print Network [OSTI]

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

Ragab M. Gad

2010-03-03T23:59:59.000Z

284

Primordial Black Holes as Heat Sources for Living Systems with Longest Possible Lifetimes  

E-Print Network [OSTI]

Just forty years ago, Hawking wrote his famous paper on primordial black holes (PBH). There have been since innumerable discussions on the consequences of the existence of such exotic objects and ramifications of their properties. Here we suggest that PBH's in an ever expanding universe (as implied by dark energy domination, especially of a cosmological constant) could be the ultimate repository for long lived living systems. PBH's having solar surface temperatures would last 10^32 years as a steady power source and should be considered in any discussion on exobiological life.

C Sivaram; Kenath Arun; Kiren O V

2014-02-14T23:59:59.000Z

285

Primordial Black Holes as Heat Sources for Living Systems with Longest Possible Lifetimes  

E-Print Network [OSTI]

Just forty years ago, Hawking wrote his famous paper on primordial black holes (PBH). There have been since innumerable discussions on the consequences of the existence of such exotic objects and ramifications of their properties. Here we suggest that PBH's in an ever expanding universe (as implied by dark energy domination, especially of a cosmological constant) could be the ultimate repository for long lived living systems. PBH's having solar surface temperatures would last 10^32 years as a steady power source and should be considered in any discussion on exobiological life.

Sivaram, C; O, Kiren

2014-01-01T23:59:59.000Z

286

40 Years of Discovery  

SciTech Connect (OSTI)

History is most interesting when seen through the eyes of those who lived it. In this 40th anniversary retrospective of bioscience research at Lawrence Livermore National Laboratory, we've asked 19 scientists to share their personal recollections about a major accomplishment in the program's history. We have not tried to create a comprehensive or seamless story. Rather, we've attempted to capture the perspectives of key individuals, each of whom worked on a research program that met significant milestones. We have focused particularly on programs and accomplishments that have shaped the current Biology and Biotechnology Research Program (BBRP). In addition, we have included a timeline of biosciences at LLNL, a history of the directorate that appeared in the Laboratory's magazine, ''Science & Technology Review'', in 2002, and a list of bioscience-related articles that have appeared over the years in ''Science & Technology Review and its predecessor, Energy & Technology Review''. The landscape of biological science today is stunningly different from 40 years ago. When LLNL bioscience began in 1963, we knew about the structure of DNA and that it was the carrier of genetic information. However, it would be another year before scientists would understand how DNA codes for the production of proteins and more than a decade before the earliest DNA sequence would be known. It is sometimes difficult to remember that it was only 15 years ago that the polymerase chain reaction, a synthetic method to amplify pieces of DNA was developed, and that only within the last half-dozen years has sequence data for entire organisms begun to be available. In this publication, we have tried to capture some of the landmark and seminal research history: radiation effects studies, which were a major reason for founding the biological research program, and flow sorting and chromosome painting, which dramatically changed our ability to study DNA damage and enabled the creation of chromosome-specific clone libraries, a key step toward sequencing the human genome. Several histories relate to the Human Genome Project itself and surrounding technologies, and several to long-standing research themes such as DNA repair, food mutagens, and reproductive biology. Others describe more recent developments such as computational biology, health-care technologies, and biodefense research.

Weinstein, B; Heller, A

2003-07-08T23:59:59.000Z

287

Black Carbon Soot Impact on Snow Albedo: A Laboratory Investigation  

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

Black Carbon Soot Impact on Snow Albedo: A Laboratory Investigation Black Carbon Soot Impact on Snow Albedo: A Laboratory Investigation Speaker(s): Odelle Hadley Date: August 13, 2009 - 12:00pm Location: 90-3075 This presentation examines the changing cryosphere and specifically the role of black carbon on the reflectivity of snow. Small amounts of black carbon in snow purportedly contribute to a reduction in snow albedo, contributing to regional climate change and early onset of melting. Our current research focuses on the connection between black carbon and albedo reduction. This presentation will describe our laboratory experiments wherein we make and characterize pure and contaminated snow and assess the black carbon snow albedo reduction as a function of black carbon mixing ratio and snow grain size. Experimental results are compared to verify or

288

Bounding the Role of Black Carbon in the Climate System: A Scientific Assessment  

SciTech Connect (OSTI)

Black carbon aerosol plays a unique and important role in Earth’s climate system. Black carbon is a type of carbonaceous material with a unique combination of physical properties. Predominant sources are combustion related; namely, fossil fuels for transportation, solid fuels for industrial and residential uses, and open burning of biomass. Total global emissions of black carbon using bottom-up inventory methods are 7500 Gg yr-1 in the year 2000 with an uncertainty range of 2000 to 29000. This assessment provides an evaluation of black-carbon climate forcing that is comprehensive in its inclusion of all known and relevant processes and that is quantitative in providing best estimates and uncertainties of the main forcing terms: direct solar absorption, influence on liquid, mixed-phase, and ice clouds, and deposition on snow and ice. These effects are calculated with models, but when possible, they are evaluated with both microphysical measurements and field observations. Global atmospheric absorption attributable to black carbon is too low in many models, and should be increased by about about 60%. After this scaling, the best estimate for the industrial-era (1750 to 2005) direct radiative forcing of black carbon is +0.43 W m-2 with 90% uncertainty bounds of (+0.17, +0.68) W m-2. Total direct forcing by all black carbon sources in the present day is estimated as +0.49 (+0.20, +0.76) W m-2. Direct radiative forcing alone does not capture important rapid adjustment mechanisms. A framework is described and used for quantifying climate forcings and their rapid responses and feedbacks. The best estimate of industrial-era (1750 to 2005) climate forcing of black carbon through all forcing mechanisms is +0.77 W m-2 with 90% uncertainty bounds of +-0.06 to +1.53 W m-2. Thus, there is a 96% probability that black carbon emissions, independent of co-emitted species, have a positive forcing and warm the climate. With a value of +0.77 W m-2, black carbon is likely the second most important individual climate-forcing agent in the industrial era, following carbon dioxide. Sources that emit black carbon also emit other short- lived species that may either cool or warm climate. Climate forcings from co-emitted species are estimated and used in the framework described herein. When the principal effects of co- emissions, including cooling agents such as sulfur dioxide, are included in net forcing, energy-related sources (fossil-fuel and biofuel) have a net climate forcing of +0.004 (-0.62 to +0.57) W m-2 during the first year after emission. For a few of these sources, such as diesel engines and possibly residential biofuels, warming is strong enough that eliminating all emissions from these sources would reduce net climate forcing (i.e., produce cooling). When open burning emissions, which emit high levels of organic matter, are included in the total, the best estimate of net industrial-era climate forcing by all black- carbon-rich sources becomes slightly negative (-0.08 W m-2 with 90% uncertainty bounds of -1.23 to +0.81 W m-2). The uncertainties in net climate forcing from black-carbon-rich sources are substantial, largely due to lack of knowledge about cloud interactions with both black carbon and co-emitted organic carbon. In prioritizing potential black-carbon mitigation actions, non-science factors, such as technical feasibility, costs, policy design, and implementation feasibility play important roles. The major sources of black carbon are presently in different stages with regard to the feasibility for near-term mitigation. This assessment, by evaluating the large number and complexity of the associated physical and radiative processes in black-carbon climate forcing, sets a baseline from which to improve future climate forcing estimates.

Bond, Tami C.; Doherty, Sarah J.; Fahey, D. W.; Forster, Piers; Berntsen, T.; DeAngelo, B. J.; Flanner, M. G.; Ghan, Steven J.; Karcher, B.; Koch, Dorothy; Kinne, Stefan; Kondo, Yutaka; Quinn, P. K.; Sarofim, Marcus; Schultz, Martin; Schulz, M.; Venkataraman, C.; Zhang, Hua; Zhang, Shiqiu; Bellouin, N.; Guttikunda, S. K.; Hopke, P. K.; Jacobson, M. Z.; Kaiser, J. W.; Klimont, Z.; Lohmann, U.; Schwarz, Joshua P.; Shindell, Drew; Storelvmo, Trude; Warren, Stephen G.; Zender, C. S.

2013-06-06T23:59:59.000Z

289

,"Projected Year Base","Year","Summer",,,"Eastern Power Grid...  

U.S. Energy Information Administration (EIA) Indexed Site

2009 " ,"(Megawatts and Percent)" ,"Projected Year Base","Year","Summer",,,"Eastern Power Grid",,,"Texas Power Grid",,,"Western Power Grid" ,,,"Contiguous...

290

,"Projected Year Base","Year","Summer",,,"Eastern Power Grid...  

U.S. Energy Information Administration (EIA) Indexed Site

2008 " ,"(Megawatts and Percent)" ,"Projected Year Base","Year","Summer",,,"Eastern Power Grid",,,"Texas Power Grid",,,"Western Power Grid" ,,,"Contiguous...

291

Black Hills Power Inc | Open Energy Information  

Open Energy Info (EERE)

Jump to: navigation, search Jump to: navigation, search Name Black Hills Power Inc Place Rapid City, South Dakota Utility Id 19545 Utility Location Yes Ownership I NERC Location WECC NERC MRO Yes NERC WECC Yes Operates Generating Plant Yes Activity Generation Yes Activity Transmission Yes Activity Buying Transmission Yes Activity Distribution Yes Activity Wholesale Marketing Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] Energy Information Administration Form 826[2] SGIC[3] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! Black Hills Power, Inc. Smart Grid Project was awarded $9.576 Recovery Act Funding with a total project value of $19,153,256. Utility Rate Schedules Grid-background.png GL (General Service Large) Commercial GS (General Service - Total Electric) Commercial

292

Black hole foraging: feedback drives feeding  

E-Print Network [OSTI]

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

Dehnen, Walter

2013-01-01T23:59:59.000Z

293

Rotating black string with nonlinear source  

SciTech Connect (OSTI)

In this paper, we derive rotating black string solutions in the presence of two kinds of nonlinear electromagnetic fields, so-called Born-Infeld and power Maxwell invariant. Investigation of the solutions show that for the Born-Infeld black string the singularity is timelike and the asymptotic behavior of the solutions is anti-de Sitter, but for power Maxwell invariant solutions, depending on the values of nonlinearity parameter, the singularity may be timelike as well as spacelike and the solutions are not asymptotically anti-de Sitter for all values of the nonlinearity parameter. Next, we calculate the conserved quantities of the solutions by using the counterterm method, and find that these quantities do not depend on the nonlinearity parameter. We also compute the entropy, temperature, the angular velocity, the electric charge, and the electric potential of the solutions, in which the conserved and thermodynamics quantities satisfy the first law of thermodynamics.

Hendi, S. H. [Physics Department, College of Sciences, Yasouj University, Yasouj 75914 (Iran, Islamic Republic of); Research Institute for Astrophysics and Astronomy of Maragha (RIAAM), P.O. Box 55134-441, Maragha (Iran, Islamic Republic of) and National Elite Foundation, P.O. Box 19615-334, Tehran (Iran, Islamic Republic of)

2010-09-15T23:59:59.000Z

294

Geometric description of BTZ black holes thermodynamics  

E-Print Network [OSTI]

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

Hernando Quevedo; Alberto Sanchez

2008-11-15T23:59:59.000Z

295

Hybrid black-hole binary initial data  

E-Print Network [OSTI]

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

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

2010-12-04T23:59:59.000Z

296

Planning for Years to Come  

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

Planning for Years to Come Planning for Years to Come LANL's Governing Policy on the Environment August 1, 2013 Water sampling tour for the Association of Experiential Education...

297

The high energy emission from black holes  

E-Print Network [OSTI]

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

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

2007-11-06T23:59:59.000Z

298

Black hole remnants in the early universe  

Science Journals Connector (OSTI)

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

Fabio Scardigli; Christine Gruber; Pisin Chen

2011-03-09T23:59:59.000Z

299

Comparing quantum black holes and naked singularities  

E-Print Network [OSTI]

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

T. P. Singh

2000-12-21T23:59:59.000Z

300

Electromagnetic wave scattering by Schwarzschild black holes  

E-Print Network [OSTI]

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

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

2009-05-20T23:59:59.000Z

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


301

A New Years Trip A New Years Trip  

E-Print Network [OSTI]

A New Years Trip A New Years Trip December 26, 2003 - January 3, 2004 By Saul Wilson #12;A New Years Trip 7 INTRODUCTION #12;A New Years Trip 8 rom December 26, 2003 to January 3, 2004 my dad and I

Wilson, W. Stephen

302

Calendar Year 2013  

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

3 Office of Inspector General 
1000 3 Office of Inspector General 
1000 Independence Avenue, SW 
 Washington, DC 20585 202-586-4128 en Audit Report: OAS-FS-14-03 http://energy.gov/ig/downloads/audit-report-oas-fs-14-03 Audit Report: OAS-FS-14-03

303

Black Diamond Power Co | Open Energy Information  

Open Energy Info (EERE)

Black Diamond Power Co Black Diamond Power Co Place West Virginia Utility Id 1764 Utility Location Yes Ownership I NERC Location RFC NERC RFC Yes Activity Distribution Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] Energy Information Administration Form 826[2] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png No rate schedules available. Average Rates Residential: $0.1200/kWh Commercial: $0.0685/kWh The following table contains monthly sales and revenue data for Black Diamond Power Co (West Virginia). Month RES REV (THOUSAND $) RES SALES (MWH) RES CONS COM REV (THOUSAND $) COM SALES (MWH) COM CONS IND_REV (THOUSAND $) IND SALES (MWH) IND CONS OTH REV (THOUSAND $) OTH SALES (MWH) OTH CONS TOT REV (THOUSAND $) TOT SALES (MWH) TOT CONS

304

Quantization of rotating linear dilaton black holes  

E-Print Network [OSTI]

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

I. Sakalli

2014-06-19T23:59:59.000Z

305

Analysis of regional demand for natural gas by black and nonblack families  

SciTech Connect (OSTI)

This study examines long-term implications of a hypothetical 20% increase in the price of natural gas for black and nonblack families, by household, in the continental United States. The analysis focuses on four specific effects of such an increase: demand for natural gas, expenditure for natural gas, natural gas expenditure as a share of family income, and consumer surplus. Data are organized geographically to represent three sections of the continental United States - the northeastern states, the north central states, and the southern and western states. (The state groupings are identical to those represented in the country's census regions; the southern and western census regions were combined because of data limitations). The report presents demand equations that were used to estimate gas consumption and expenditure by average black and nonblack families in the three geographic areas. Models representing typical household types, each with a specific set of attributes, are then presented to show average base-year values for natural gas consumption and expenditure for two types of black and nonblack families - those that use natural gas for any purpose and only those that use it for space heating. (Base-period values are estimated using data from a DOE survey conducted in the years 1980 and 1981). The effects of a hypothetical 20% increase in the price of natural gas on the various household types were then estimated. Those effects are summarized. Families using natural gas for a any purpose in the north central states would experience the greatest long-term effects of a 20% price increase. Black families in those states would feel the effects more dramatically than nonblack families. The relative geographic effects of such a price increase change, however, when only those families that use natural gas for space heating are analyzed. 3 references, 4 figures, 18 tables.

Poyer, D.A.

1984-08-01T23:59:59.000Z

306

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

E-Print Network [OSTI]

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

Hal M. Haggard; Carlo Rovelli

2014-07-06T23:59:59.000Z

307

Black Carbon Emissions by Rocket Engines Types of rocket engines Emissions  

E-Print Network [OSTI]

Black Carbon Emissions by Rocket Engines Types of rocket engines Emissions Liquid Hydrogen. Note: Black carbon does not deplete ozone. What happens is the black carbon emissions from the rocket. Other black carbon emissions: The number one contributor to black carbon is burning biomass. Also

Toohey, Darin W.

308

The Foundation Year Monash University  

E-Print Network [OSTI]

The Foundation Year Monash University Foundation Year Monash College has helped me to make my future better. By studying the Foundation Year, I am always learning something new and still having lots of fun. Thanks to the Foundation Year, I am preparing for a successful future. Vonny Leonardy, Monash

Albrecht, David

309

NUCLEAR ENGINEERING Four Year Plan  

E-Print Network [OSTI]

NUCLEAR ENGINEERING Four Year Plan Fall 2009 Nuclear Engineering (67 hrs) CH Grade Perspectives (15;Nuclear Engineering Four Year Plan Starting Fall 2009 FALL Year 1 Credits WINTER Year 1 Credits SPRING I NE 452 3 Neutronic Analysis II NE 457 2 Nuclear Reactor Lab Western Culture (3): NE 467 4 Nucl

Tullos, Desiree

310

ARM - Field Campaign - Characterization of Black Carbon Mixing State  

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

govCampaignsCharacterization of Black Carbon Mixing State govCampaignsCharacterization of Black Carbon Mixing State Related Campaigns Characterization of Black Carbon Mixing State - II 2014.02.15, Sedlacek, OSC Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Characterization of Black Carbon Mixing State 2012.11.01 - 2013.06.14 Lead Scientist : Arthur Sedlacek For data sets, see below. Description The objective of the proposed experiments was to characterize the mixing state of black carbon produced in biomass burning using the single particle soot photometer (SP2). The large uncertainty associated with black carbon (BC) direct forcing is due, in part, to the dependence of light absorption of BC-containing particles on the position of the BC aggregate within the particle. It is

311

Black Hills Energy - Solar Power Program | Department of Energy  

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

Black Hills Energy - Solar Power Program Black Hills Energy - Solar Power Program Black Hills Energy - Solar Power Program < Back Eligibility Commercial Fed. Government General Public/Consumer Industrial Local Government Nonprofit Residential Schools State Government Savings Category Solar Buying & Making Electricity Program Info Start Date 7/1/2006 State Colorado Program Type Performance-Based Incentive Rebate Amount Systems up to 10 kW: $0.1267/kWh (only for first 5 kW) Systems larger than 10 kW up to 100 kW: $0.16/kWh Provider Black Hills Energy Black Hills Energy has a performance-based incentive (PBI) for photovoltaic (PV) systems up to 100 kilowatts (kW) in capacity. In exchange for these incentives, Black Hills Energy earns the right to the renewable energy credits (RECs) associated with the PV-generated electricity for a period of

312

Residential Commercial Industrial Year  

Gasoline and Diesel Fuel Update (EIA)

4 4 Residential Commercial Industrial Year and State Volume (million cubic feet) Consumers Volume (million cubic feet) Consumers Volume (million cubic feet) Consumers 2000 Total ................... 4,996,179 59,252,728 3,182,469 5,010,817 8,142,240 220,251 2001 Total ................... 4,771,340 60,286,364 3,022,712 4,996,446 7,344,219 217,026 2002 Total ................... 4,888,816 61,107,254 3,144,169 5,064,384 7,507,180 205,915 2003 Total ................... R 5,079,351 R 61,871,450 R 3,179,493 R 5,152,177 R 7,150,396 R 205,514 2004 Total ................... 4,884,521 62,469,142 3,141,653 5,135,985 7,250,634 212,191 Alabama ...................... 43,842 806,175 26,418 65,040 169,135 2,800 Alaska.......................... 18,200 104,360 18,373 13,999 46,580 10 Arizona ........................

313

A toroidal black hole for the AGN phenomenon  

E-Print Network [OSTI]

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

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

2000-08-30T23:59:59.000Z

314

Hawking radiation of Dirac particles from black strings  

SciTech Connect (OSTI)

Hawking radiation has been studied as a phenomenon of quantum tunneling in different black holes. In this paper we extend this semi-classical approach to cylindrically symmetric black holes. Using the Hamilton-Jacobi method and WKB approximation we calculate the tunneling probabilities of incoming and outgoing Dirac particles from the event horizon and find the Hawking temperature of these black holes. We obtain results both for uncharged as well as charged particles.

Ahmed, Jamil; Saifullah, K., E-mail: jamil_051@yahoo.com, E-mail: saifullah@qau.edu.pk [Department of Mathematics, Quaid-i-Azam University, Islamabad (Pakistan)

2011-08-01T23:59:59.000Z

315

A Quantum Material Model of Static Schwarzschild Black Holes  

E-Print Network [OSTI]

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

S. -T. Sung

1997-03-16T23:59:59.000Z

316

On the Stability of Black Holes at the LHC  

E-Print Network [OSTI]

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

M. D. Maia; E. M. Monte

2008-08-19T23:59:59.000Z

317

Black Hills Energy (Gas) - Residential Energy Efficiency Program |  

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

Black Hills Energy (Gas) - Residential Energy Efficiency Program Black Hills Energy (Gas) - Residential Energy Efficiency Program Black Hills Energy (Gas) - Residential Energy Efficiency Program < Back Eligibility Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heating Home Weatherization Commercial Weatherization Sealing Your Home Ventilation Appliances & Electronics Water Heating Maximum Rebate All Incentives: $750/customer Ceiling/Wall/Foundation Insulation: $500 Infiltration Control/Caulking/Weather Stripping: $200 Duct Insulation: $150 Program Info State Colorado Program Type Utility Rebate Program Rebate Amount Qualified New Homes (Builders): Contact Black Hills Energy Evaluations: Free or reduced cost Storage Water Heater: $75 or $300 Tankless Water Heater: $300 Furnace/Boiler Maintenance: $30 or $100

318

Black Hills Energy (Gas) - Commercial Energy Efficiency Program |  

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

Black Hills Energy (Gas) - Commercial Energy Efficiency Program Black Hills Energy (Gas) - Commercial Energy Efficiency Program Black Hills Energy (Gas) - Commercial Energy Efficiency Program < Back Eligibility Commercial Industrial Institutional Local Government Nonprofit Schools State Government Savings Category Heating & Cooling Commercial Heating & Cooling Heating Home Weatherization Commercial Weatherization Sealing Your Home Construction Design & Remodeling Other Appliances & Electronics Water Heating Windows, Doors, & Skylights Maximum Rebate General: Contact Black Hills Energy; Rebates over $10,000 must be pre-approved Ceiling/Wall Insulation: $10,000 Infiltration Control: $1,500 Energy Evaluations: $1500 Custom: 50% of incremental cost Program Info Start Date 7/1/2010 State Colorado Program Type Utility Rebate Program

319

Argonne's African American Black Club awards scholarships to...  

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

students July 30, 2014 Tweet EmailPrint The African American Black Club (AABC) at Argonne has awarded four scholarships to promising local Illinois high school students to...

320

National Conference of Black Mayors, Inc. | Department of Energy  

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

Black Mayors, Inc., members' capacity for energy and environmental planning through computer-based technology, Internet access, and a training workshop. National Conference of...

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


321

Black Holes as Conformal Field Theories on Horizons  

E-Print Network [OSTI]

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

Halyo, Edi

2015-01-01T23:59:59.000Z

322

Origin of palladium black by an infrared spectroscopic method  

SciTech Connect (OSTI)

Metal blacks are used as catalysts in a number of organic synthesis processes. Using the method of matrix insulation of blacks obtained from organometallic compounds in the inert atmosphere the IR spectra have been recorded for carbon monoxide adsorbed on actual palladium blacks. The controllable mild conditions for reduction of the initial complex by hydrazine hydrate provide a means of separating the intermediate states of this process. By discontinuing at various stages the reduction of the organometallic complex being investigated the authors have obtained IR spectra of carbon monoxide characterizing the stages of forming the metallic palladium black.

Vozdvizhenskii, V.F.; Levintova, T.D.; Sokol'skii, D.V.

1987-03-01T23:59:59.000Z

323

Comparison of Black Hole Generators for the LHC  

E-Print Network [OSTI]

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

Douglas M. Gingrich

2006-10-17T23:59:59.000Z

324

Primordial Black Hole Evolution in Tensor-Scalar Cosmology  

Science Journals Connector (OSTI)

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

Ted Jacobson

1999-10-04T23:59:59.000Z

325

A rotating black hole in the Galactic Center  

E-Print Network [OSTI]

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

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

1992-12-07T23:59:59.000Z

326

BlackLight Power Inc | Open Energy Information  

Open Energy Info (EERE)

Name: BlackLight Power Inc Place: Cranbury, New Jersey Zip: 8512 Sector: Hydro, Hydrogen Product: Researching a means of producing energy by catalysing the reaction of...

327

Using the Uncharged Kerr Black Hole as a Gravitational Mirror  

Science Journals Connector (OSTI)

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

Claes R. Cramer

1997-04-01T23:59:59.000Z

328

The first law of thermodynamics in Lifshitz black holes revisited  

E-Print Network [OSTI]

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

Yongwan Gim; Wontae Kim; Sang-Heon Yi

2014-03-19T23:59:59.000Z

329

Absorption of scalars by extremal black holes in string theory  

E-Print Network [OSTI]

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

Filipe Moura

2014-06-13T23:59:59.000Z

330

Extremal charged rotating dilaton black holes in odd dimensions  

SciTech Connect (OSTI)

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

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

2010-09-15T23:59:59.000Z

331

Extremal Charged Rotating Dilaton Black Holes in Odd Dimensions  

E-Print Network [OSTI]

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

Masoud Allahverdizadeh; Jutta Kunz; Francisco Navarro-Lerida

2010-07-24T23:59:59.000Z

332

Nepal Migration Year Book 2011 Migration Year Book  

E-Print Network [OSTI]

Nepal Migration Year Book 2011 1 #12;Nepal Migration Year Book 2011 NIDS NCCR North-South #12;Book Nepal Migration Year Book 2011 Publishers Nepal Institute of Development Studies (NIDS) G.P.O. Box: 7647, Kathmandu, Nepal Email: nids@mail.com.np Web: www.nids.org.np National Centre of Competence in Research

Richner, Heinz

333

T-534: Vulnerability in the PDF distiller of the BlackBerry Attachment...  

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

PDF distiller of the BlackBerry Attachment Service for the BlackBerry Enterprise Server T-534: Vulnerability in the PDF distiller of the BlackBerry Attachment Service for the...

334

Extraneous Carbon Assessments in Radiocarbon Measurements of Black Carbon in Environmental Matrices  

E-Print Network [OSTI]

rived (black/elemental) carbon in soils and sediments usingbon measurements of black carbon in aerosols and oceanMWI, Noack AG. 2000. Black carbon in soils and sediments:

Coppola, Alysha; Ziolkowski, L. A.; Druffel, E. R. M.

2013-01-01T23:59:59.000Z

335

T-602: BlackBerry Enterprise Server Input Validation Flaw in...  

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

02: BlackBerry Enterprise Server Input Validation Flaw in BlackBerry Web Desktop Manager Permits Cross-Site Scripting Attacks T-602: BlackBerry Enterprise Server Input Validation...

336

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

E-Print Network [OSTI]

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

Maryland at College Park, University of

337

Geodesic Study of Regular Hayward Black Hole  

E-Print Network [OSTI]

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

G. Abbas; U. Sabiullah

2014-06-03T23:59:59.000Z

338

A black potential for spin less particles  

E-Print Network [OSTI]

We consider the most general non-Hermitian Hulthen potential to study the scattering of spin-less relativistic particles. The conditions for CC, SS and CPA are obtained analytically for this potential. We show that almost total absorption occurs for entire range of incidence energy for certain parameter ranges of the potential and hence term this as `black potential'. Time reversed of the same potential shows perfect emission for the entire range of particle energy. We also present the classical analog of this potential in terms of waveguide cross section.

Ananya Ghatak; Mohammad Hasan; Bhabani Prasad Mandal

2014-12-02T23:59:59.000Z

339

Conformal Invariance of Black Hole Temperature  

E-Print Network [OSTI]

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

Ted Jacobson; Gungwon Kang

1993-07-06T23:59:59.000Z

340

Black Hole Constraints on Varying Fundamental Constants  

SciTech Connect (OSTI)

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

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

2007-08-10T23:59:59.000Z

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


341

The Fourth Law of Black Hole Thermodynamics  

E-Print Network [OSTI]

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

C. O. Lousto

1993-06-10T23:59:59.000Z

342

Black Hole Remnants at the LHC  

E-Print Network [OSTI]

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

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

2012-01-16T23:59:59.000Z

343

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

E-Print Network [OSTI]

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

Wontae Kim; Edwin J. Son; Myungseok Yoon

2008-01-09T23:59:59.000Z

344

ATNI Mid-year Convention  

Broader source: Energy.gov [DOE]

The Affiliated Tribes of Northwest Indians Mid-year Convention will be hosted by the Chehalis Tribe.

345

Flow Test At Black Warrior Area (DOE GTP) | Open Energy Information  

Open Energy Info (EERE)

Flow Test At Black Warrior Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Flow Test At Black Warrior Area (DOE GTP) Exploration...

346

E-Print Network 3.0 - asian black latino Sample Search Results  

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

Ethnic Summary: IndianNative American Asian Black or African American HispanicLatino White Multi-Racial Unspecified... Native American Asian Black or African American Hispanic...

347

Black Carbon’s Properties and Role in the Environment: A Comprehensive Review  

E-Print Network [OSTI]

NOAA/ESRL. Mauna Loa Carbon Dioxide Annual Mean Data.H. Can reducing black carbon emissions counteract globalanalysis of black carbon in soils. Global Biogeochem. Cycle.

Shrestha, Gyami

2010-01-01T23:59:59.000Z

348

Fundamental study of black liquor gasification kinetics using a pressurized entrained-flow reactor (PEFR). Quarterly progress report for the period July 1999 to September 1999  

SciTech Connect (OSTI)

The goal of the program is to identify the optimal operating window for black liquor gasification. The goals during this year are to prepare the PEFR for operation, conduct a series of preliminary screening tests to bracket BLG operating conditions, and develop a process model that can guide identification of the optimal operating window.

NONE

1999-10-29T23:59:59.000Z

349

Intermediate-Mass Black Holes as LISA Sources  

E-Print Network [OSTI]

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

M. Coleman Miller

2008-12-16T23:59:59.000Z

350

Verifying Red-Black Trees Paolo Baldan1  

E-Print Network [OSTI]

Verifying Red-Black Trees Paolo Baldan1 , Andrea Corradini2 , Javier Esparza3 , Tobias Heindel3,heindets,koenigba,koziouvi}@fmi.uni-stuttgart.de Abstract. We show how to verify the correctness of insertion of ele- ments into red-black trees--a form of balanced search trees--using anal- ysis techniques developed for graph rewriting. We first model red

Baldan, Paolo

351

Accelerating and rotating black holes J. B. Griffiths1  

E-Print Network [OSTI]

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

352

The cosmological evolution of quasar black hole masses  

Science Journals Connector (OSTI)

......distribution of the central engine (e.g. Laor 1998, 2000...some other physical limit on fuel supply which prevents accretion...physical limit on black hole fuel supply might be imposed by...expected to limit the mass consumption rate of a supermassive black......

Ross J. McLure; James S. Dunlop

2004-08-21T23:59:59.000Z

353

1 Introduction The Euclidean distance map (EDM) of a black  

E-Print Network [OSTI]

and the near­ est black pixel. The EDM plays an important role in machine vision, pattern recognitionTitle page 1 #12; 1 Introduction The Euclidean distance map (EDM) of a black and white n 2 n binary, and robotics[9]. Many algorithms have been proposed for com­ puting the EDM. Yamada[10] presented an EDM

Fujiwara, Akihiro

354

The third law of thermodynamics for Kerr black holes  

Science Journals Connector (OSTI)

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

Isao Okamoto; Osamu Kaburaki

1991-05-15T23:59:59.000Z

355

Synchronous Black Hole Search in Directed Graphs Adrian Kosowski  

E-Print Network [OSTI]

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

Paris-Sud XI, Université de

356

Modified Black Hole with Polar Jet and Vortex  

E-Print Network [OSTI]

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

T. Tmmalm

2001-12-06T23:59:59.000Z

357

Electromagnetic extraction of energy from Kerr black holes  

E-Print Network [OSTI]

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

Isao Okamoto

2005-06-14T23:59:59.000Z

358

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

E-Print Network [OSTI]

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

Stefan Hollands; Akihiro Ishibashi

2014-08-04T23:59:59.000Z

359

Large historical changes of fossil-fuel black carbon aerosols  

SciTech Connect (OSTI)

Anthropogenic emissions of fine black carbon (BC) particles, the principal light-absorbing atmospheric aerosol, have varied during the past century in response to changes of fossil-fuel utilization, technology developments, and emission controls. We estimate historical trends of fossil-fuel BC emissions in six regions that represent about two-thirds of present day emissions and extrapolate these to global emissions from 1875 onward. Qualitative features in these trends show rapid increase in the latter part of the 1800s, the leveling off in the first half of the 1900s, and the re-acceleration in the past 50 years as China and India developed. We find that historical changes of fuel utilization have caused large temporal change in aerosol absorption, and thus substantial change of aerosol single scatter albedo in some regions, which suggests that BC may have contributed to global temperature changes in the past century. This implies that the BC history needs to be represented realistically in climate change assessments.

Novakov, T.; Ramanathan, V.; Hansen, J.E.; Kirchstetter, T.W.; Sato, M.; Sinton, J.E.; Sathaye, J.A.

2002-09-26T23:59:59.000Z

360

Primordial black holes as biased tracers  

E-Print Network [OSTI]

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

Tada, Yuichiro

2015-01-01T23:59:59.000Z

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


361

Light Loop Echoes and Blinking Black Holes  

E-Print Network [OSTI]

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

362

Black Hole Instabilities and Exponential Growth  

E-Print Network [OSTI]

Recently, a general analysis has been given of the stability with respect to axisymmetric perturbations of stationary-axisymmetric black holes and black branes in vacuum general relativity in arbitrary dimensions. It was shown that positivity of canonical energy on an appropriate space of perturbations is necessary and sufficient for stability. However, the notions of both "stability" and "instability" in this result are significantly weaker than one would like to obtain. In this paper, we prove that if a perturbation of the form $\\pounds_t \\delta g$---with $\\delta g$ a solution to the linearized Einstein equation---has negative canonical energy, then that perturbation must, in fact, grow exponentially in time. The key idea is to make use of the $t$- or ($t$-$\\phi$)-reflection isometry, $i$, of the background spacetime and decompose the initial data for perturbations into their odd and even parts under $i$. We then write the canonical energy as $\\mathscr E\\ = \\mathscr K + \\mathscr U$, where $\\mathscr K$ and $...

Prabhu, Kartik

2015-01-01T23:59:59.000Z

363

Probing the puncture for black hole simulations  

SciTech Connect (OSTI)

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

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

2009-10-15T23:59:59.000Z

364

Sequencing the Black Aspergilli species complex  

SciTech Connect (OSTI)

The ~15 members of the Aspergillus section Nigri species complex (the "Black Aspergilli") are significant as platforms for bioenergy and bioindustrial technology, as members of soil microbial communities and players in the global carbon cycle, and as food processing and spoilage agents and agricultural toxigens. Despite their utility and ubiquity, the morphological and metabolic distinctiveness of the complex's members, and thus their taxonomy, is poorly defined. We are using short read pyrosequencing technology (Roche/454 and Illumina/Solexa) to rapidly scale up genomic and transcriptomic analysis of this species complex. To date we predict 11197 genes in Aspergillus niger, 11624 genes in A. carbonarius, and 10845 genes in A. aculeatus. A. aculeatus is our most recent genome, and was assembled primarily from 454-sequenced reads and annotated with the aid of >2 million 454 ESTs and >300 million Solexa ESTs. To most effectively deploy these very large numbers of ESTs we developed 2 novel methods for clustering the ESTs into assemblies. We have also developed a pipeline to propose orthologies and paralogies among genes in the species complex. In the near future we will apply these methods to additional species of Black Aspergilli that are currently in our sequencing pipeline.

Kuo, Alan; Salamov, Asaf; Zhou, Kemin; Otillar, Robert; Baker, Scott; Grigoriev, Igor

2011-03-11T23:59:59.000Z

365

Strengthening Our Partnerships with Historically Black Colleges and  

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

Partnerships with Historically Black Colleges and Partnerships with Historically Black Colleges and Universities Strengthening Our Partnerships with Historically Black Colleges and Universities January 13, 2011 - 6:06pm Addthis Strengthening Our Partnerships with Historically Black Colleges and Universities Secretary Chu Secretary Chu Former Secretary of Energy Last February, President Obama renewed the White House Initiative on Historically Black Colleges and Universities to encourage collaboration between government agencies, educational associations, philanthropic organizations, the private sector and others to increase the capacity of HBCUs to provide high-quality education to a greater number of students. The Department of Energy is committed to supporting education at HBCUs and has partnered with HBCUs on a variety of projects. As part of that

366

Hypervelocity binary stars: smoking gun of massive binary black holes  

E-Print Network [OSTI]

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

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

2007-07-12T23:59:59.000Z

367

Extremal black holes and the first law of thermodynamics  

Science Journals Connector (OSTI)

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

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

2013-11-27T23:59:59.000Z

368

Updated 5/20/14 Freshman Year (32) Sophomore Year (34) Junior Year (34)  

E-Print Network [OSTI]

Updated 5/20/14 Freshman Year (32) Sophomore Year (34) Junior Year (34) Fall (15) Spring (18) Fall (17) Spring (16) Fall (18) Spring (16) Fall (16) Spring (13) CALC I (4) CALC III [4] SOLIDS (3) CALC membership recommended prerequisite corequisite Engineering-related summer job or internship recommended lab

369

Updated 3/21/13 Freshman Year (32) Sophomore Year (34) Junior Year (34)  

E-Print Network [OSTI]

Updated 3/21/13 Freshman Year (32) Sophomore Year (34) Junior Year (34) Fall (15) Spring (17) Fall (18) Spring (16) Fall (18) Spring (16) Fall (16) Spring (13) CALC I (4) CALC III [4] SOLIDS (3) CALC membership recommended prerequisite corequisite Engineering-related summer job or internship recommended lab

370

Love isn't always black and white: understanding black-white interracial couples, their challenges, and their dyadic communication  

E-Print Network [OSTI]

of their privileged position in society, whites life situations had never had necessitated that they learn about the black co-culture. The black partners also reported seeing the white community differently by understanding the nuances of racism at a deeper level...

Wilson, Misty Michelle

2009-05-15T23:59:59.000Z

371

Hunter College Black Male Initiative-"Brothers for Excellence"-Summer Pipeline Programs Hunter College Black Male Initiative  

E-Print Network [OSTI]

Hunter College Black Male Initiative-"Brothers for Excellence"- Summer Pipeline Programs 1 Hunter College Black Male Initiative "Brothers for Excellence" Summer Pipeline Programs Table of Contents Page 11 Law Pipeline Programs 1 11 Graduate School, Earning a Ph.D., Conduct Research Pipeline Programs 24 16

Qiu, Weigang

372

5 Year Financial Profile -Charts 5 Year Financial Profile Charts  

E-Print Network [OSTI]

. Income Expenditure Assets Liabilities http://www.fin.mmu.ac.uk/f18_001b.htm06/07/2004 13:02:41 #12;5 Year Financial Profile - Charts - Income 5 Year Financial Profile Charts Income Back http://www.fin.mmu.ac.uk/f18 Profile Charts Expenditure Back http://www.fin.mmu.ac.uk/f18_001d.htm06/07/2004 13:02:52 #12;5 Year

373

5 Year Financial Profile -Charts 5 Year Financial Profile Charts  

E-Print Network [OSTI]

. Income Expenditure Assets Liabilities http://www.fin.mmu.ac.uk/f18_0029.htm06/07/2004 13:01:23 #12;5 Year Financial Profile - Charts - Income 5 Year Financial Profile Charts Income Back http://www.fin.mmu.ac.uk/f18 Profile Charts Expenditure Back http://www.fin.mmu.ac.uk/f18_002d.htm06/07/2004 13:01:34 #12;5 Year

374

Black Coral Capital | Open Energy Information  

Open Energy Info (EERE)

Coral Capital Coral Capital Jump to: navigation, search Name Black Coral Capital Address 55 Union Street, 3rd Floor Place Boston, Massachusetts Zip 02108 Region Greater Boston Area Product Cleantech private equity Number of employees 1-10 Website [www.blackcoralcapital.com www.blackcoralcapital.com ] Coordinates 42.3615754°, -71.0572318° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.3615754,"lon":-71.0572318,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

375

Black River Electric Coop | Open Energy Information  

Open Energy Info (EERE)

Coop Coop Jump to: navigation, search Name Black River Electric Coop Place Missouri Utility Id 1775 Utility Location Yes Ownership C NERC Location SERC NERC SERC Yes Activity Distribution Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png Outdoor Lighting MV 175 W Lighting Outdoor Lighting MV 250 W Lighting Outdoor Lighting MV 400 W Lighting Outdoor Lighting SLV 400 W Direct Lighting Outdoor Lighting SLV 400 W Flood Lighting Outdoor Lighting SVL 100 W Lighting Residential Residential Single Phase General Service Commercial Standard Single-Phase Commercial/Industrial Service Industrial

376

square-mile Black Warrior Basin  

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

will inject CO will inject CO 2 into a coalbed methane (CBM) well in Tuscaloosa County, Alabama, to assess the capability of mature CBM reservoirs to receive and adsorb large volumes of CO 2 . Injection began at the test site on June 15; the site was selected because it is representative of the 23,000- square-mile Black Warrior Basin located in northwestern Alabama and northeastern Mississippi. It is estimated that this area has the potential to store in the range of 1.1 to 2.3 Gigatons of CO 2 , which is approximately the amount that Alabama's coal-fired power plants emit in two decades. The targeted coal seams range from 940 to 1,800 feet deep and are one to six feet thick. Approximately 240 tons of CO 2 will be injected over a 45- to 60-day period. More information

377

Viscosity, Black Holes, and Quantum Field Theory  

E-Print Network [OSTI]

We review recent progress in applying the AdS/CFT correspondence to finite-temperature field theory. In particular, we show how the hydrodynamic behavior of field theory is reflected in the low-momentum limit of correlation functions computed through a real-time AdS/CFT prescription, which we formulate. We also show how the hydrodynamic modes in field theory correspond to the low-lying quasinormal modes of the AdS black p-brane metric. We provide a proof of the universality of the viscosity/entropy ratio within a class of theories with gravity duals and formulate a viscosity bound conjecture. Possible implications for real systems are mentioned.

D. T. Son; A. O. Starinets

2007-04-02T23:59:59.000Z

378

What's Wrong With Black Hole Thermodynamics?  

E-Print Network [OSTI]

Not only is the Bekenstein expression for the entropy of a black hole a convex function of the energy, rather than being a concave function as it must be, it predicts a final equilibrium temperature given by the harmonic mean. This violates the third law, and the principle of maximum work. The property that means are monotonically increasing functions of their argument underscores the error of transferring from temperature means to means in the internal energy when the energy is not a monotonically increasing function of temperature. Whereas the former leads to an increase in entropy, the latter lead to a decrease in entropy thereby violating the second law. The internal energy cannot increase at a slower rate than the temperature itself.

B. H. Lavenda

2011-10-23T23:59:59.000Z

379

The Galactic Center Black Hole Laboratory  

E-Print Network [OSTI]

The super-massive 4 million solar mass black hole Sagittarius~A* (SgrA*) shows flare emission from the millimeter to the X-ray domain. A detailed analysis of the infrared light curves allows us to address the accretion phenomenon in a statistical way. The analysis shows that the near-infrared flare amplitudes are dominated by a single state power law, with the low states in SgrA* limited by confusion through the unresolved stellar background. There are several dusty objects in the immediate vicinity of SgrA*. The source G2/DSO is one of them. Its nature is unclear. It may be comparable to similar stellar dusty sources in the region or may consist predominantly of gas and dust. In this case a particularly enhanced accretion activity onto SgrA* may be expected in the near future. Here the interpretation of recent data and ongoing observations are discussed.

Eckart, A; Valencia-S., M; Straubmeier, C; Zensus, J A; Karas, V; Kunneriath, D; Alberdi, A; Sabha, N; Schödel, R; Puetzfeld, D

2015-01-01T23:59:59.000Z

380

Fiscal Year 2012 Congressional Budget  

Office of Energy Efficiency and Renewable Energy (EERE)

The Fiscal Year 2012 Congressional Budget of the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy.

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


381

One Year Passport to Success  

Broader source: Energy.gov [DOE]

Describes the framework for the Department's on-boarding program for a new employee from day one through their first year.

382

Fiscal Year 2011 Congressional Budget  

Office of Energy Efficiency and Renewable Energy (EERE)

The Fiscal Year 2011 Congressional Budget of the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy.

383

Lasers: The First Fifty Years  

SciTech Connect (OSTI)

This year marks the 50th anniversary of the invention of the laser. The Optical Society of America is publishing this feature issue to celebrate this auspicious birthday.

Boyd, Robert W.; Athale, Ravindra; Onural, Levent; Seka, Wolf

2010-09-01T23:59:59.000Z

384

Relativistic hydrodynamics in the presence of puncture black holes  

SciTech Connect (OSTI)

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

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

2007-11-15T23:59:59.000Z

385

Gauss-Bonnet black holes in dS spaces  

Science Journals Connector (OSTI)

We study the thermodynamic properties associated with the black hole horizon and cosmological horizon for the Gauss-Bonnet solution in de Sitter space. When the Gauss-Bonnet coefficient is positive, a locally stable small black hole appears in the case of spacetime dimension d=5, the stable small black hole disappears, and the Gauss-Bonnet black hole is always unstable quantum mechanically when d>~6. On the other hand, the cosmological horizon is found to be always locally stable independent of the spacetime dimension. But the solution is not globally preferred; instead, the pure de Sitter space is globally preferred. When the Gauss-Bonnet coefficient is negative, there is a constraint on the value of the coefficient, beyond which the gravity theory is not well defined. As a result, there is not only an upper bound on the size of black hole horizon radius at which the black hole horizon and cosmological horizon coincide with each other, but also a lower bound depending on the Gauss-Bonnet coefficient and spacetime dimension. Within the physical phase space, the black hole horizon is always thermodynamically unstable and the cosmological horizon is always stable; furthermore, as in the case of the positive coefficient, the pure de Sitter space is still globally preferred. This result is consistent with the argument that the pure de Sitter space corresponds to an UV fixed point of dual field theory.

Rong-Gen Cai and Qi Guo

2004-05-26T23:59:59.000Z

386

Black Holes and the Third Law of Thermodynamics  

E-Print Network [OSTI]

We discuss in the framework of black hole thermodynamics some aspects relative to the third law in the case of black holes of the Kerr-Newman family. In the light of the standard proof of the equivalence between the unattainability of the zero temperature and the entropic version of the third law it is remarked that the unattainability has a special character in black hole thermodynamics. Also the zero temperature limit which obtained in the case of very massive black holes is discussed and it is shown that a violation of the entropic version in the charged case occurs. The violation of the Bekenstein-Hawking law in favour of zero entropy S_E=0 in the case of extremal black holes is suggested as a natural solution for a possible violation of the second law of thermodynamics. Thermostatic arguments in support of the unattainability are explored, and $S_E=0$ for extremal black holes is shown to be again a viable solution. The third law of black hole dynamics by W.Israel is then interpreted as a further strong corroboration to the picture of a discontinuity between extremal states and non-extremal ones.

F. Belgiorno; M. Martellini

2002-10-08T23:59:59.000Z

387

Yearly  

E-Print Network [OSTI]

In 2009, a new activity was launched under the International Energy Agency Wind Implementing Agreement (IEA Wind) for the small wind sector. The main focus of this activity, called Task 27, is to develop recommended practices for consumer labeling of existing commercial small wind turbines. Participants will also exchange information about the status of the small wind industry in the member countries. This report outlines the status of the small wind sector in 2009 in the countries participating in Task 27. (For more information about IEA Wind and the consumer label developed under Task 27, see www.ieawind.org.)

unknown authors

2009-01-01T23:59:59.000Z

388

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI F) 0 Hispanic Male (H M) 0 Hispanic Female (H F) 0 White Male (W M) 10 White Female (W F) 2 DIVERSITY TOTAL WORKFORCE GENDER Associate...

389

YEAR  

National Nuclear Security Administration (NNSA)

African American Female 5 Asian Male 0 Asian Female 0 Hispanic Male 0 Hispanic Female 3 White Male 9 White Female 1 Workforce Diversity Office of the Administrator (NA-1) As of...

390

YEAR  

National Nuclear Security Administration (NNSA)

American Female 2 Asian Male 2 Asian Female 0 Hispanic Male 13 Hispanic Female 17 White Male 37 White Female 17 DIVERSITY GENDER Workforce Diversity Sandia Site Office As of...

391

YEAR  

National Nuclear Security Administration (NNSA)

American Female 6 Asian Male 0 Asian Female 0 Hispanic Male 7 Hispanic Female 18 White Male 40 White Female 25 DIVERSITY GENDER Workforce Diversity As of March 24, 2012 PAY...

392

YEAR  

National Nuclear Security Administration (NNSA)

(AAPI,F) 2 2 0.00% Hispanic Male (H,M) 6 6 0.00% Hispanic Female (H,F) 6 6 0.00% White Male (W,M) 53 50 -5.66% White Female (W,F) 19 13 -31.58% Change DIVERSITY...

393

YEAR  

National Nuclear Security Administration (NNSA)

American Female 39 Asian Male 4 Asian Female 5 Hispanic Male 20 Hispanic Female 50 White Male 57 White Female 84 DIVERSITY Workforce Diversity Associate Administrator for...

394

YEAR  

National Nuclear Security Administration (NNSA)

American Female 43 Asian Male 3 Asian Female 4 Hispanic Male 21 Hispanic Female 47 White Male 61 White Female 92 DIVERSITY Workforce Diversity Associate Administrator for...

395

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI F) 0 Hispanic Male (H M) 0 Hispanic Female (H F) 0 White Male (W M) 4 White Female (W F) 5 DIVERSITY TOTAL WORKFORCE GENDER Associate...

396

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI F) 25 Hispanic Male (H M) 202 Hispanic Female (H F) 177 White Male (W M) 1244 White Female (W F) 453 Total includes 2425 permanent and 21 temporary...

397

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI, F) 1 Hispanic Male (H, M) 5 Hispanic Female (H, F) 6 White Male (W, M) 75 White Female (W, F) 32 TOTAL WORKFORCE GENDER NNSA Production Office...

398

YEAR  

National Nuclear Security Administration (NNSA)

American Female 19 Asian Male 9 Asian Female 5 Hispanic Male 18 Hispanic Female 12 White Male 101 White Female 49 DIVERSITY Workforce Diversity Immediate Office of the Deputy...

399

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI F) 0 Hispanic Male (H M) 5 Hispanic Female (H F) 3 White Male (W M) 30 White Female (W F) 3 DIVERSITY TOTAL WORKFORCE GENDER Associate...

400

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI F) 3 Hispanic Male (H M) 15 Hispanic Female (H F) 33 White Male (W M) 44 White Female (W F) 68 DIVERSITY TOTAL WORKFORCE GENDER Associate...

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


401

YEAR  

National Nuclear Security Administration (NNSA)

0 0 0.00% Hispanic Male (H,M) 12 12 0.00% Hispanic Female (H,F) 12 11 -8.33% White Male (W,M) 34 34 0.00% White Female (W,F) 17 16 -5.88% Change DIVERSITY Change...

402

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI F) 2 Hispanic Male (H M) 5 Hispanic Female (H F) 3 White Male (W M) 26 White Female (W F) 16 DIVERSITY TOTAL WORKFORCE GENDER Livermore Field...

403

YEAR  

National Nuclear Security Administration (NNSA)

American Female 1 Asian Male 9 Asian Female 2 Hispanic Male 75 Hispanic Female 21 White Male 400 White Female 19 DIVERSITY Workforce Diversity Assistant Deputy Administrator...

404

YEAR  

National Nuclear Security Administration (NNSA)

3 2 -33.33% Hispanic Male (H,M) 5 5 0.00% Hispanic Female (H,F) 4 4 0.00% White Male (W,M) 29 26 -10.34% White Female (W,F) 19 16 -15.79% Change DIVERSITY...

405

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI F) 1 Hispanic Male (H M) 4 Hispanic Female (H F) 7 White Male (W M) 13 White Female (W F) 11 DIVERSITY TOTAL WORKFORCE GENDER Office of General...

406

YEAR  

National Nuclear Security Administration (NNSA)

(AAPI,F) 1 1 0.00% Hispanic Male (H,M) 5 5 0.00% Hispanic Female (H,F) 6 6 0.00% White Male (W,M) 85 71 -16.47% White Female (W,F) 33 30 -9.09% Change DIVERSITY...

407

YEAR  

National Nuclear Security Administration (NNSA)

African American Female 1 Asian Male 2 Asian Female 0 Hispanic Male 4 Hispanic Female 3 White Male 29 White Female 3 Workforce Diversity Associate Administrator for Safety & Health...

408

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI, F) 2 Hispanic Male (H, M) 74 Hispanic Female (H, F) 22 White Male (W, M) 393 White Female (W, F) 19 PAY PLAN DIVERSITY TOTAL WORKFORCE GENDER...

409

YEAR  

National Nuclear Security Administration (NNSA)

American Female 4 Asian Male 22 Asian Female 4 Hispanic Male 5 Hispanic Female 4 White Male 30 White Female 19 Workforce Diversity Livermore Site Office As of March 24, 2012...

410

YEAR  

National Nuclear Security Administration (NNSA)

American Female 7 Asian Male 3 Asian Female 0 Hispanic Male 23 Hispanic Female 24 White Male 36 White Female 35 DIVERSITY Workforce Diversity Associate Administrator for...

411

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI, F) 0 Hispanic Male (H, M) 12 Hispanic Female (H, F) 11 White Male (W, M) 34 White Female (W, F) 16 PAY PLAN DIVERSITY TOTAL WORKFORCE GENDER Sandia...

412

YEAR  

National Nuclear Security Administration (NNSA)

Hispanic Male (H,M) 217 207 -4.61% Hispanic Female (H,F) 196 182 -7.14% White Male (W,M) 1318 1271 -3.57% White Female (W,F) 511 463 -9.39% Total includes...

413

YEAR  

National Nuclear Security Administration (NNSA)

American Female 158 Asian Male 79 Asian Female 29 Hispanic Male 220 Hispanic Female 202 White Male 1340 White Female 519 Workforce Diversity National Nuclear Security...

414

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI F) 0 Hispanic Male (H M) 0 Hispanic Female (H F) 0 White Male (W M) 13 White Female (W F) 5 DIVERSITY TOTAL WORKFORCE GENDER Savannah River...

415

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI F) 2 Hispanic Male (H M) 76 Hispanic Female (H F) 21 White Male (W M) 401 White Female (W F) 20 DIVERSITY TOTAL WORKFORCE GENDER Assistant Deputy...

416

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI F) 1 Hispanic Male (H M) 3 Hispanic Female (H F) 5 White Male (W M) 43 White Female (W F) 10 DIVERSITY TOTAL WORKFORCE GENDER Associate...

417

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI F) 0 Hispanic Male (H M) 12 Hispanic Female (H F) 12 White Male (W M) 34 White Female (W F) 16 DIVERSITY TOTAL WORKFORCE GENDER Sandia Field...

418

YEAR  

National Nuclear Security Administration (NNSA)

African American Female 1 Asian Male 2 Asian Female 0 Hispanic Male 5 Hispanic Female 3 White Male 29 White Female 5 DIVERSITY Workforce Diversity Associate Administrator for...

419

YEAR  

National Nuclear Security Administration (NNSA)

African American Female 3 Asian Male 1 Asian Female 0 Hispanic Male 0 Hispanic Female 0 White Male 14 White Female 8 DIVERSITY GENDER Workforce Diversity Savannah River Site Office...

420

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI F) 0 Hispanic Male (H M) 25 Hispanic Female (H F) 25 White Male (W M) 61 White Female (W F) 41 DIVERSITY TOTAL WORKFORCE GENDER Associate...

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


421

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI F) 0 Hispanic Male (H M) 2 Hispanic Female (H F) 0 White Male (W M) 154 White Female (W F) 71 * Total numbers are combined. NA-30 total numbers...

422

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI F) 0 Hispanic Male (H M) 2 Hispanic Female (H F) 6 White Male (W M) 10 White Female (W F) 3 DIVERSITY TOTAL WORKFORCE GENDER Associate...

423

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI, F) 0 Hispanic Male (H, M) 1 Hispanic Female (H, F) 0 White Male (W, M) 25 White Female (W, F) 6 TOTAL WORKFORCE GENDER Kansas City Field Office...

424

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI F) 7 Hispanic Male (H M) 7 Hispanic Female (H F) 10 White Male (W M) 82 White Female (W F) 60 DIVERSITY TOTAL WORKFORCE GENDER Deputy...

425

YEAR  

National Nuclear Security Administration (NNSA)

African American Female 3 Asian Male 1 Asian Female 0 Hispanic Male 1 Hispanic Female 0 White Male 5 White Female 6 DIVERSITY Workforce Diversity Associate Administrator of...

426

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI F) 2 Hispanic Male (H M) 12 Hispanic Female (H F) 7 White Male (W M) 66 White Female (W F) 22 PAY PLAN DIVERSITY TOTAL WORKFORCE GENDER Deputy...

427

YEAR  

National Nuclear Security Administration (NNSA)

African American Female 2 Asian Male 3 Asian Female 0 Hispanic Male 5 Hispanic Female 5 White Male 44 White Female 13 Workforce Diversity Pantex Site Office As of March 24, 2012...

428

YEAR  

National Nuclear Security Administration (NNSA)

African American Female 2 Asian Male 1 Asian Female 0 Hispanic Male 0 Hispanic Female 0 White Male 8 White Female 3 DIVERSITY Workforce Diversity As of March 24, 2012 PAY PLAN...

429

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI, F) 2 Hispanic Male (H, M) 5 Hispanic Female (H, F) 4 White Male (W, M) 25 White Female (W, F) 17 PAY PLAN DIVERSITY TOTAL WORKFORCE GENDER...

430

YEAR  

National Nuclear Security Administration (NNSA)

2 2 0.00% Hispanic Male (H,M) 76 75 -1.32% Hispanic Female (H,F) 22 21 -4.55% White Male (W,M) 389 400 2.83% White Female (W,F) 21 19 -9.52% Change DIVERSITY...

431

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI, F) 2 Hispanic Male (H, M) 6 Hispanic Female (H, F) 6 White Male (W, M) 51 White Female (W, F) 14 PAY PLAN DIVERSITY TOTAL WORKFORCE GENDER Nevada...

432

YEAR  

National Nuclear Security Administration (NNSA)

American Female 11 Asian Male 2 Asian Female 1 Hispanic Male 3 Hispanic Female 6 White Male 50 White Female 11 DIVERSITY GENDER Workforce Diversity Associate Administrator...

433

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI F) 0 Hispanic Male (H M) 6 Hispanic Female (H F) 14 White Male (W M) 39 White Female (W F) 21 DIVERSITY TOTAL WORKFORCE GENDER Associate...

434

YEAR  

National Nuclear Security Administration (NNSA)

African American Female 4 Asian Male 2 Asian Female 3 Hispanic Male 7 Hispanic Female 5 White Male 52 White Female 20 Workforce Diversity Nevada Site Office As of March 24, 2012...

435

YEAR  

National Nuclear Security Administration (NNSA)

African American Female 2 Asian Male 1 Asian Female 1 Hispanic Male 6 Hispanic Female 9 White Male 13 White Female 10 Workforce Diversity Office of General Counsel (NA-GC) As of...

436

YEAR  

National Nuclear Security Administration (NNSA)

American Female 6 Asian Male 0 Asian Female 0 Hispanic Male 7 Hispanic Female 18 White Male 40 White Female 28 DIVERSITY Workforce Diversity Associate Administrator for...

437

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI, F) 0 Hispanic Male (H, M) 0 Hispanic Female (H, F) 0 White Male (W, M) 15 White Female (W, F) 7 TOTAL WORKFORCE GENDER Savannah River Field...

438

YEAR  

National Nuclear Security Administration (NNSA)

African American Female 8 Asian Male 3 Asian Female 1 Hispanic Male 1 Hispanic Female 0 White Male 76 White Female 22 DIVERSITY Workforce Diversity Deputy Administrator for Naval...

439

YEAR  

National Nuclear Security Administration (NNSA)

African American Female 5 Asian Male 3 Asian Female 1 Hispanic Male 0 Hispanic Female 1 White Male 46 White Female 22 Workforce Diversity Y-12 Site Office As of March 24, 2012 PAY...

440

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI F) 0 Hispanic Male (H M) 0 Hispanic Female (H F) 0 White Male (W M) 24 White Female (W F) 6 TOTAL WORKFORCE GENDER Kansas City Field Office As...

Note: This page contains sample records for the topic "black spruce year" from the National Library of EnergyBeta (NLEBeta).
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441

YEAR  

National Nuclear Security Administration (NNSA)

African American Female 4 Asian Male 0 Asian Female 0 Hispanic Male 1 Hispanic Female 0 White Male 28 White Female 6 Workforce Diversity Kansas City Site Office As of March 24,...

442

YEAR  

National Nuclear Security Administration (NNSA)

African American Female 8 Asian Male 1 Asian Female 0 Hispanic Male 2 Hispanic Female 6 White Male 11 White Female 5 DIVERSITY Workforce Diversity Associate Administrator for...

443

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI F) 0 Hispanic Male (H M) 0 Hispanic Female (H F) 3 White Male (W M) 7 White Female (W F) 1 PAY PLAN DIVERSITY TOTAL WORKFORCE GENDER National...

444

YEAR  

National Nuclear Security Administration (NNSA)

(AAPI,F) 0 0 0.00% Hispanic Male (H,M) 1 1 0.00% Hispanic Female (H,F) 0 0 0.00% White Male (W,M) 27 25 -7.41% White Female (W,F) 6 6 0.00% Change DIVERSITY Change...

445

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI F) 4 Hispanic Male (H M) 3 Hispanic Female (H F) 6 White Male (W M) 26 White Female (W F) 18 TOTAL WORKFORCE GENDER Associate Administrator for...

446

YEAR  

National Nuclear Security Administration (NNSA)

Pacific Islander Female (AAPI F) 1 Hispanic Male (H M) 6 Hispanic Female (H F) 6 White Male (W M) 68 White Female (W F) 30 DIVERSITY TOTAL WORKFORCE GENDER NNSA Production...

447

Microsoft Word - NatlConfBlackMayors.doc  

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

National Conference of Black Mayors, Inc. National Conference of Black Mayors, Inc. Initiative: Partnered in developing the 1997 Environmental Justice conference, "The State of Environmental Justice in America" Cooperative Agreement, created in 1999 * Goal * Technical Assistance * Communities Served * Community Impact Goal: The cooperative agreement enhances the National Conference of Black Mayors, Inc. (NCBM) members' capacity for energy and environmental planning through computer-based technology, Internet access and a training workshop. Technical Assistance: The NCBM will establish a formal relationship with DOE's Dr. Samuel P. Massie Chairs of Excellence Program participants. The Massie Chairs of Excellence Program partnership will provide the NCBM's members with technical assistance in the environmental

448

Black Hills Energy (Gas) - Residential Energy Efficiency Rebate Programs |  

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

Black Hills Energy (Gas) - Residential Energy Efficiency Rebate Black Hills Energy (Gas) - Residential Energy Efficiency Rebate Programs Black Hills Energy (Gas) - Residential Energy Efficiency Rebate Programs < Back Eligibility Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heating Home Weatherization Commercial Weatherization Sealing Your Home Appliances & Electronics Design & Remodeling Windows, Doors, & Skylights Water Heating Maximum Rebate Insulation: $750 Weather-Stripping and Caulking: $200 Program Info State Iowa Program Type Utility Rebate Program Rebate Amount Energy Evaluation: Free Clothes Washers: $100 Dishwashers: $20 Replacement Furnaces: $250 - $400 Replacement Boilers: $150 or $400 Duct Repair/Sealing: $200 Duct Insulation (R-8): $150 Insulation/Weather-Stripping/Caulking: 70% of project cost

449

Geodesic Motion in the (Charged) Doubly Spinning Black Ring Spacetime  

E-Print Network [OSTI]

In this article we analyze the geodesics of test particles and light in the five dimensional (charged) doubly spinning black ring spacetime. Apparently it is not possible to separate the Hamilton-Jacobi-equation for (charged) doubly spinning black rings in general, so we concentrate on special cases: null geodesics in the ergosphere and geodesics on the two rotational axes of the (charged) doubly spinning black ring. We present analytical solutions to the geodesic equations for these special cases. Using effective potential techniques we study the motion of test particles and light and discuss the corresponding orbits.

Saskia Grunau; Valeria Kagramanova; Jutta Kunz

2012-12-03T23:59:59.000Z

450

Scalar emission in a rotating Gödel black hole  

E-Print Network [OSTI]

We study the absorption probability and Hawking radiation of the scalar field in the rotating G\\"{o}del black hole in minimal five-dimensional gauged supergravity. We find that G\\"{o}del parameter $j$ imprints in the greybody factor and Hawking radiation. It plays a different role from the angular momentum of the black hole in the Hawking radiation and super-radiance. These information can help us know more about rotating G\\"{o}del black holes in minimal five-dimensional gauged supergravity.

Songbai Chen; Bin Wang; Jiliang Jing

2008-08-23T23:59:59.000Z

451

Safeguards Approaches for Black Box Processes or Facilities  

SciTech Connect (OSTI)

The objective of this study is to determine whether a safeguards approach can be developed for “black box” processes or facilities. These are facilities where a State or operator may limit IAEA access to specific processes or portions of a facility; in other cases, the IAEA may be prohibited access to the entire facility. The determination of whether a black box process or facility is safeguardable is dependent upon the details of the process type, design, and layout; the specific limitations on inspector access; and the restrictions placed upon the design information that can be provided to the IAEA. This analysis identified the necessary conditions for safeguardability of black box processes and facilities.

Diaz-Marcano, Helly; Gitau, Ernest TN; Hockert, John; Miller, Erin; Wylie, Joann

2013-09-25T23:59:59.000Z

452

Hawking temperature of rotating charged black strings from tunneling  

SciTech Connect (OSTI)

Thermal radiations from spherically symmetric black holes have been studied from the point of view of quantum tunneling. In this paper we extend this approach to study radiation of fermions from charged and rotating black strings. Using WKB approximation and Hamilton-Jacobi method we work out the tunneling probabilities of incoming and outgoing fermions and find the correct Hawking temperature for these objects. We show that in appropriate limits the results reduce to those for the uncharged and non-rotating black strings.

Ahmed, Jamil; Saifullah, K., E-mail: jamil_051@yahoo.com, E-mail: saifullah@qau.edu.pk [Department of Mathematics, Quaid-i-Azam University, Islamabad (Pakistan)

2011-11-01T23:59:59.000Z

453

Accretion onto a black hole in a string cloud background  

E-Print Network [OSTI]

We examine the accretion process onto the black hole with a string cloud background, where the horizon of the black hole has an enlarged radius $r_H=2 M/(1-\\alpha)$, due to the string cloud parameter $\\alpha\\; (0 \\leq \\alpha cloud parameter $\\alpha$. We also find the gas compression ratios and temperature profiles below the accretion radius and at the event horizon. It is shown that the mass accretion rate, for both the relativistic and the non-relativistic fluid by a black hole in the string cloud model, increases with increase in $\\alpha$.

Apratim Ganguly; Sushant G. Ghosh; Sunil D. Maharaj

2014-09-28T23:59:59.000Z

454

Phenomenological Description of the Interior of the Schwarzschild Black Hole  

E-Print Network [OSTI]

We discuss a sufficiently large 4-dimensional Schwarzschild black hole which is in equilibrium with a heat bath. In other words, we consider a black hole which has grown up from a small one in the heat bath adiabatically. We express the metric of the interior of the black hole in terms of two functions: One is the intensity of the Hawking radiation, and the other is the ratio between the radiation energy and the pressure in the radial direction. Especially in the case of conformal matters we check that it is a self-consistent solution of the semi-classical Einstein equation, $G_{\\mu\

Hikaru Kawai; Yuki Yokokura

2014-09-19T23:59:59.000Z

455

Three-dimensional Chern-Simons black holes  

SciTech Connect (OSTI)

We construct black hole solutions to three-dimensional Einstein-Maxwell theory with both gravitational and electromagnetic Chern-Simons terms. These intrinsically rotating solutions are geodesically complete, and causally regular within a certain parameter range. Their mass, angular momentum and entropy are found to satisfy the first law of black hole thermodynamics. These Chern-Simons black holes admit a four-parameter local isometry algebra, which generically is sl(2,R)xR, and may be generated from the corresponding vacua by local coordinate transformations.

Moussa, Karim Ait [Laboratoire de Physique Mathematique et Physique Subatomique, Departement de Physique, Faculte des Sciences, Universite Mentouri, Constantine 25000 (Algeria); Clement, Gerard; Leygnac, Cedric [Laboratoire de Physique Theorique LAPTH (CNRS), B.P.110, F-74941 Annecy-le-Vieux cedex (France); Guennoune, Hakim [Laboratoire de Physique Theorique LAPTH (CNRS), B.P.110, F-74941 Annecy-le-Vieux cedex (France); Departement de Physique, Faculte des Sciences, Universite Ferhat Abbas, Setif 19000 (Algeria)

2008-09-15T23:59:59.000Z

456

Black hole evaporation within a momentum-dependent metric  

SciTech Connect (OSTI)

We investigate the black hole thermodynamics in a 'deformed' relativity framework where the energy-momentum dispersion law is Lorentz-violating and the Schwarzchild-like metric is momentum-dependent with a Planckian cutoff. We obtain net deviations of the basic thermodynamical quantities from the Hawking-Bekenstein predictions: actually, the black hole evaporation is expected to quit at a nonzero critical mass value (of the order of the Planck mass), leaving a zero temperature remnant, and avoiding a spacetime singularity. Quite surprisingly, the present semiclassical corrections to black hole temperature, entropy, and heat capacity turn out to be identical to the ones obtained within some quantum approaches.

Salesi, G.; Di Grezia, E. [Universita Statale di Bergamo, Facolta di Ingegneria, viale Marconi 5, I-24044 Dalmine (Italy) and Istituto Nazionale di Fisica Nucleare, Sezione di Milano, via Celoria 16, I-20133 Milan (Italy)

2009-05-15T23:59:59.000Z

457

Role of dipole charges in black hole thermodynamics  

SciTech Connect (OSTI)

Modern derivations of the first law of black holes appear to show that the only charges that arise are monopole charges that can be obtained by surface integrals at infinity. However, the recently discovered five dimensional black ring solutions empirically satisfy a first law in which dipole charges appear. We resolve this contradiction and derive a general form of the first law for black rings. Dipole charges do appear together with a corresponding potential. We also include theories with Chern-Simons terms and generalize the first law to other horizon topologies and more generic local charges.

Copsey, Keith; Horowitz, Gary T. [Department of Physics, UCSB, Santa Barbara, California 93106 (United States)

2006-01-15T23:59:59.000Z

458

Inferring black hole charge from backscattered electromagnetic radiation  

E-Print Network [OSTI]

We compute the scattering cross section of Reissner-Nordstr\\"om black holes for the case of an incident electromagnetic wave. We describe how scattering is affected by both the conversion of electromagnetic to gravitational radiation, and the parity-dependence of phase shifts induced by the black hole charge. The latter effect creates a helicity-reversed scattering amplitude that is non-zero in the backward direction. We show that from the character of the electromagnetic wave scattered in the backward direction it is possible, in principle, to infer if a static black hole is charged.

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

2014-09-16T23:59:59.000Z

459

Hawking Radiation by Kerr Black Holes and Conformal Symmetry  

SciTech Connect (OSTI)

The exponential blueshift associated with the event horizon of a black hole makes conformal symmetry play a fundamental role in accounting for its thermal properties. Using a derivation based on two-point functions, we show that the full spectrum of thermal radiation of scalar particles by Kerr black holes can be explicitly derived on the basis of a conformal symmetry arising in the wave equation near the horizon. The simplicity of our approach emphasizes the depth of the connection between conformal symmetry and black hole radiance.

Agullo, Ivan; Parker, Leonard [Physics Department, University of Wisconsin-Milwaukee, P.O. Box 413, Milwaukee, Wisconsin 53201 (United States); Navarro-Salas, Jose [Departamento de Fisica Teorica and IFIC, Centro Mixto Universidad de Valencia-CSIC. Facultad de Fisica, Universidad de Valencia, Burjassot-46100, Valencia (Spain); Olmo, Gonzalo J. [Instituto de Estructura de la Materia, CSIC, Serrano 121, 28006 Madrid (Spain)

2010-11-19T23:59:59.000Z

460

Venice data > year = 1931:1981  

E-Print Network [OSTI]

:3,] year r1 1 1931 103 2 1932 78 3 1933 121 > attach(venice) ## > plot(year,r1) > lm(r1 ~ year) Call: lm(formula = r1 ~ year) #12;Coefficients: (Intercept) year -989.382 0.567 > lm(r1 ~ year - mean(year)) ## Error differ (found for 'mean(year)') ### > lm(r1 ~ I(year - mean(year))) Call: lm(formula = r1 ~ I(year - mean

Reid, Nancy

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


461

Merton's Status Exchange Theory and Husband-Wife Education Differences in Black Intermarriage  

E-Print Network [OSTI]

........................................................................................................ 86 REFERENCES ................................................................................................................. 88 vii LIST OF FIGURES Page Figure 5-1. Histogram of Husband-Wife Education Difference Residuals... that a white woman’s black husband does so. These findings would suggest status exchange support for black men, not black women. In their case, endogamous intermarriage is taking place where the level of education is similar among black-white marriages...

Malone, Danny E.

2013-10-23T23:59:59.000Z

462

Black California Dreamin': The Crises of California's African-American Communities  

E-Print Network [OSTI]

Palo Alto. 19 Demographically, South Bay black pioneers had to work together because their population

Woods, Clyde

2012-01-01T23:59:59.000Z

463

The 3-Sphere and the Bicycling Black Rings Event Horizon The 3-Sphere and the Bicycling  

E-Print Network [OSTI]

The 3-Sphere and the Bicycling Black Rings Event Horizon #12;#12;The 3-Sphere and the Bicycling that "the bicycling black rings" are a admissible solution to the event horizon of black holes in 4 is to develop a method of visualising the bicycling black rings and other four-dimensional objects. In the end

Bengtsson, Ingemar

464

5 Year Financial Profile -Charts 5 Year Financial Profile Charts  

E-Print Network [OSTI]

Charts Income Back http://www.fin.mmu.ac.uk/f18_004b.htm06/07/2004 12:57:08 #12;5 Year Financial Profile - Charts - zoom 5 Year Financial Profile Charts Expenditure Back http://www.fin.mmu.ac.uk/f18_004c.htm06 http://www.fin.mmu.ac.uk/f18_004d.htm06/07/2004 12:57:19 #12;5 Year Financial Profile - Charts - zoom 5

465

5 Year Financial Profile -Charts 5 Year Financial Profile Charts  

E-Print Network [OSTI]

Charts Income Back http://www.fin.mmu.ac.uk/f18_008b.htm06/07/2004 12:51:21 #12;5 Year Financial Profile - Charts - zoom 5 Year Financial Profile Charts Expenditure Back http://www.fin.mmu.ac.uk/f18_008c.htm06 http://www.fin.mmu.ac.uk/f18_008d.htm06/07/2004 12:51:31 #12;5 Year Financial Profile - Charts - zoom 5

466

5 Year Financial Profile -Charts 5 Year Financial Profile Charts  

E-Print Network [OSTI]

Charts Income Back http://www.fin.mmu.ac.uk/f18_010b.htm06/07/2004 10:57:23 #12;5 Year Financial Profile - Charts - zoom 5 Year Financial Profile Charts Expenditure Back http://www.fin.mmu.ac.uk/f18_010c.htm06 http://www.fin.mmu.ac.uk/f18_010d.htm06/07/2004 12:40:15 #12;5 Year Financial Profile - Charts - zoom 5

467

EM-21 Multi-Year Program Plan Prioritization Process  

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

July 24, 2008 July 24, 2008 EM-21 Multi-Year Program Plan Prioritization Process A presentation to the Department of Energy High Level Waste Corporate Board 2 Topics to be Covered ¡ Initiative Development Team approach and structure ¡ Goals ¡ Background on prioritization process ¡ Lessons Learned from FY 2008 ¡ Prioritization Process l Overview l Criteria l Task Development and Selection l Current status l Process output ¡ Program Management 3 Waste Processing Programs Initiative Development Team Structure Waste Processing Programs (WBS 1.0) Steve Krahn (EM-21) Texas Chee (EM-21) Lead - Jeff Griffin (SRNL) Deputy - Paul Bredt (PNNL) Jay Roach (INL) Ben Lewis (ORNL) Blue - EM-20 Green - SRNL Red - INL Purple - PNNL Brown - ORNL Black - Other Affiliated Institutions Legend: Personnel: Improved Waste Storage

468

5 Year Financial Profile -Charts 5 Year Financial Profile Charts  

E-Print Network [OSTI]

. Income Expenditure Assets Liabilities & Reserves http://www.fin.mmu.ac.uk/f18_0067.htm06/07/2004 13 Profile Charts Expenditure Back http://www.fin.mmu.ac.uk/f18_006b.htm06/07/2004 13:04:46 #12;5 Year Financial Profile - Charts - Assets 5 Year Financial Profile Charts Assets Back http://www.fin.mmu.ac.uk/f18

469

5 Year Financial Profile -Charts 5 Year Financial Profile Charts  

E-Print Network [OSTI]

. Income Expenditure Assets Liabilities Income Breakdown Expenditure Breakdown http://www.fin.mmu.ac.uk/f18 Charts Income Back http://www.fin.mmu.ac.uk/f18_005b.htm06/07/2004 13:00:29 #12;5 Year Financial Profile - Charts - zoom 5 Year Financial Profile Charts Expenditure Back http://www.fin.mmu.ac.uk/f18_005c.htm06

470

5 Year Financial Profile -Charts 5 Year Financial Profile Charts  

E-Print Network [OSTI]

. Income Expenditure Assets Liabilities & Reserves http://www.fin.mmu.ac.uk/f18_0079.htm06/07/2004 13 Profile Charts Expenditure Back http://www.fin.mmu.ac.uk/f18_007b.htm06/07/2004 13:05:59 #12;5 Year Financial Profile - Charts - Assets 5 Year Financial Profile Charts Assets Back http://www.fin.mmu.ac.uk/f18

471

Black Hills Power, Inc. Smart Grid Project | Open Energy Information  

Open Energy Info (EERE)

Black Hills Power, Inc. Smart Grid Project Black Hills Power, Inc. Smart Grid Project Jump to: navigation, search Project Lead Black Hills Power, Inc. Country United States Headquarters Location Rapid City, South Dakota Additional Benefit Places North Dakota, Minnesota Recovery Act Funding $9.576,628 Total Project Value $19,153,256 Coverage Area Coverage Map: Black Hills Power, Inc. Smart Grid Project Coordinates 44.0805434°, -103.2310149° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

472

Students, Faculty from Historically Black Colleges and Universities Share  

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

Students, Faculty from Historically Black Colleges and Universities Students, Faculty from Historically Black Colleges and Universities Share Research with EM Laboratory in Successful Exchange Students, Faculty from Historically Black Colleges and Universities Share Research with EM Laboratory in Successful Exchange February 5, 2013 - 12:00pm Addthis South Carolina State University students William Dumpson, left, and Alejandra Chirino, center, talk with Savannah River National Laboratory Director Dr. Terry Michalske at a recent research exchange involving the laboratory and seven historically black colleges and universities. South Carolina State University students William Dumpson, left, and Alejandra Chirino, center, talk with Savannah River National Laboratory Director Dr. Terry Michalske at a recent research exchange involving the

473

Celebrating Black History Month w/ DOE's Travis Dredd | Department of  

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

Celebrating Black History Month w/ DOE's Travis Dredd Celebrating Black History Month w/ DOE's Travis Dredd Celebrating Black History Month w/ DOE's Travis Dredd February 2, 2011 - 2:49pm Addthis Travis Dredd Travis Dredd Ebony Meeks Former Assistant Press Secretary, Office of Public Affairs "As I get caught-up in my day-to-day activities, I try to remember something he once said "Do your little bit of good where you are; it's those little bits of good put together, that overwhelm the world." Travis Dredd This month, we celebrate Black History Month. Throughout February, we will introduce you to African Americans who are working to advance the President's clean energy agenda and help the Department of Energy achieve its mission. Our first profile is of Travis Dredd, Special Assistant to Secretary Chu.

474

Students, Faculty from Historically Black Colleges and Universities Share  

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

Students, Faculty from Historically Black Colleges and Universities Students, Faculty from Historically Black Colleges and Universities Share Research with EM Laboratory in Successful Exchange Students, Faculty from Historically Black Colleges and Universities Share Research with EM Laboratory in Successful Exchange February 5, 2013 - 12:00pm Addthis South Carolina State University students William Dumpson, left, and Alejandra Chirino, center, talk with Savannah River National Laboratory Director Dr. Terry Michalske at a recent research exchange involving the laboratory and seven historically black colleges and universities. South Carolina State University students William Dumpson, left, and Alejandra Chirino, center, talk with Savannah River National Laboratory Director Dr. Terry Michalske at a recent research exchange involving the

475

Demonstration of Black Liquor Gasification at Big Island  

SciTech Connect (OSTI)

This Final Technical Report provides an account of the project for the demonstration of Black Liquor Gasification at Georgia-Pacific LLC's Big Island, VA facility. This report covers the period from May 5, 2000 through November 30, 2006.

Robert DeCarrera

2007-04-14T23:59:59.000Z

476

Search for gravitational waves from intermediate mass binary black holes  

E-Print Network [OSTI]

We present the results of a weakly modeled burst search for gravitational waves from mergers of nonspinning intermediate mass black holes in the total mass range 100–450??M? and with the component mass ratios between 1?1 ...

Barsotti, Lisa

477

Eyeing Oil, Synthetic Biologists Mine Microbes for Black Gold  

Science Journals Connector (OSTI)

...Black gold. Algae (below) produce...converted into biodiesel. CREDITS...converted to biodiesel. But the technology...need to harvest algae from large...as renewable biodiesel. Instead of growing their algae outside in the...

Robert F. Service

2008-10-24T23:59:59.000Z

478

Primary caustics and critical points behind a Kerr black hole  

SciTech Connect (OSTI)

The primary optical caustic surface behind a Kerr black hole is a four-cusped tube displaced from the line of sight. We derive the caustic surface in the nearly asymptotic region far from the black hole through a Taylor expansion of the lightlike geodesics up to and including fourth-order terms in m/b and a/b, where m is the black hole mass, a the spin, and b the impact parameter. The corresponding critical locus in the observer's sky is elliptical and a pointlike source inside the caustics will be imaged as an Einstein cross. With regard to lensing near critical points, a Kerr lens is analogous to a circular lens perturbed by a dipole and a quadrupole potential. The caustic structure of the supermassive black hole in the Galactic center could be probed by lensing of low mass x-ray binaries in the galactic inner regions or by hot spots in the accretion disk.

Sereno, Mauro; De Luca, Fabiana [Institut fuer Theoretische Physik, Universitaet Zuerich, Winterthurerstrasse 190, CH-8057 Zuerich (Switzerland)

2008-07-15T23:59:59.000Z

479

Analytical Kerr black hole lensing in the weak deflection limit  

Science Journals Connector (OSTI)

We present an analytical treatment of gravitational lensing by a Kerr black hole in the weak deflection limit. Lightlike geodesics are expanded as a Taylor series up to and including third-order terms in m/b and a/b, where m is the black hole mass, a the angular momentum, and b the impact parameter of the light ray. Positions and magnifications of individual images are computed with a perturbative analysis. At this order, the degeneracy with the translated Schwarzschild lens is broken. The critical curve is still a circle displaced from the black hole position in the equatorial direction and the corresponding caustic is pointlike. The degeneracy between the black hole spin and its inclination relative to the observer is broken through the angular coordinates of the perturbed images.

Mauro Sereno and Fabiana De Luca

2006-12-21T23:59:59.000Z

480

Primary caustics and critical points behind a Kerr black hole  

Science Journals Connector (OSTI)

The primary optical caustic surface behind a Kerr black hole is a four-cusped tube displaced from the line of sight. We derive the caustic surface in the nearly asymptotic region far from the black hole through a Taylor expansion of the lightlike geodesics up to and including fourth-order terms in m/b and a/b, where m is the black hole mass, a the spin, and b the impact parameter. The corresponding critical locus in the observer’s sky is elliptical and a pointlike source inside the caustics will be imaged as an Einstein cross. With regard to lensing near critical points, a Kerr lens is analogous to a circular lens perturbed by a dipole and a quadrupole potential. The caustic structure of the supermassive black hole in the Galactic center could be probed by lensing of low mass x-ray binaries in the galactic inner regions or by hot spots in the accretion disk.

Mauro Sereno and Fabiana De Luca

2008-07-09T23:59:59.000Z

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


481

On black hole evolution in active galactic nuclei  

Science Journals Connector (OSTI)

......whether higher accretion rates during low activity periods...accretion discs|black hole physics|galaxies: active|galaxies...the decreasing accretion rate must pass through the range of intermediate accretion rates ( _10-3 .AEdd)' At......

R. Moderski; M. Sikora

1996-12-01T23:59:59.000Z

482

"Black Box" EMC model for Power Electronics Converter Mikael Foissac  

E-Print Network [OSTI]

"Black Box" EMC model for Power Electronics Converter Mikael Foissac Grenoble Electrical electronics, Electromagnetic compatibility, Reduced order systems, Parameter estimation. I. INTRODUCTION With the generalization of the "Power by Wire" concept, especially in aircraft and automotive applications, the electrical

Paris-Sud XI, Université de

483

Black-box reductions for cost-sharing mechanism design  

Science Journals Connector (OSTI)

We consider the design of strategyproof cost-sharing mechanisms. We give two simple, but extremely versatile, black-box reductions, that in combination reduce the cost-sharing mechanism-design problem to the algorithmic problem of ...

Konstantinos Georgiou; Chaitanya Swamy

2012-01-01T23:59:59.000Z

484

Quantum Emission from Two-Dimensional Black Holes  

E-Print Network [OSTI]

We investigate Hawking radiation from two-dimensional dilatonic black holes using standard quantization techniques. In the background of a collapsing black hole solution the Bogoliubov coefficients can be exactly determined. In the regime after the black hole has settled down to an `equilibrium' state but before the backreaction becomes important these give the known result of a thermal distribution of Hawking radiation at temperature lambda/(2pi). The density matrix is computed in this regime and shown to be purely thermal. Similar techniques can be used to derive the stress tensor. The resulting expression agrees with the derivation based on the conformal anomaly and can be used to incorporate the backreaction. Corrections to the thermal density matrix are also examined, and it is argued that to leading order in perturbation theory the effect of the backreaction is to modify the Bogoliubov transformation, but not in a way that restores information lost to the black holes.

Steven B. Giddings; W. M. Nelson

2009-11-27T23:59:59.000Z

485

The Energy for 2+1 Dimensional Black Hole Solutions  

E-Print Network [OSTI]

The energy distributions of four 2+1 dimensional black hole solutions were obtained by using the Einstein and M{\\o}ller energy-momentum complexes. while $r \\to \\infty$, the energy distributions of these four solutions become divergence.

I-Ching Yang; Irina Radinschi

2006-11-05T23:59:59.000Z

486

The Pectolytic Activity of Molds Isolated from Black Raspberries  

Science Journals Connector (OSTI)

...concentration of the starch and the concentration of the amylase, respectively...procedure for bacterial amylases. REFERENCES Di CARLO...REDFERN, S. 1947 Alpha-amylase from Bacillus subtilis...showed that no tissue break- down of the black raspberries...

L. S. White; F. W. Fabian

1953-09-01T23:59:59.000Z

487

Lovelock black holes in a string cloud background  

E-Print Network [OSTI]

We present an exact static, spherically symmetric black hole solution to the third order Lovelock gravity with a string cloud background in seven dimensions for the special case when the second and third order Lovelock coefficients are related via $\\tilde{\\alpha}^2_2=3\\tilde{\\alpha}_3\\;(\\equiv\\alpha^2)$. Further, we examine thermodynamic properties of this black hole to obtain exact expressions for mass, temperature, entropy and also perform the thermodynamic stability analysis. We see that a string cloud background makes a profound influence on horizon structure, thermodynamic properties and the stability of black holes. Interestingly, the entropy of the black hole is unaffected due to a string cloud background. However, the critical solution for thermodynamic stability is being affected by a string cloud background.

Tae-Hun Lee; Dharmanand Baboolal; Sushant G. Ghosh

2014-09-12T23:59:59.000Z

488

MLK Day/Black History Month DOE Celebration  

Broader source: Energy.gov [DOE]

Join us as the Department honors both Dr. King and Black History Month with a dialogue on the history of civil rights for all. Secretary Ernest Moniz will open our program.

489

Extremal Black Holes and First Law of Thermodynamics  

E-Print Network [OSTI]

We study the low temperature expansion of the first law of thermodynamics for near-extremal black holes. We show that for extremal black holes with non-vanishing entropy, the leading order contribution yields an expression for their extremal entropy in agreement with the entropy function result and the Cardy formula for the entropy of a two dimensional chiral conformal field theory (CFT). When their entropy vanishes due to the vanishing of a one-cycle on the horizon, such leading contribution is always compatible with the first law satisfied by a BTZ black hole. These results are universal and consistent both with the presence of local AdS2 and AdS3 near horizon throats for extremal black holes and with the suggested quantum microscopic descriptions (AdS2/CFT1, Kerr/CFT and EVH/CFT).

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

2013-05-14T23:59:59.000Z

490

Thermodynamics and Thermodynamic geometry of Park black hole  

E-Print Network [OSTI]

We study the thermodynamics and thermodynamic geometry of Park black hole in Ho\\v{r}ava gravity. By incorporating the ideas of differential geometry, we have investigated the thermodynamics using Weinhold geometry and Ruppeiner geometry. We have also analyzed it in the context of newly developed geometrothermodynamics(GTD). Divergence of specific heat is associated with the second order phase transition of black hole. Here in the context of Park black hole, both Weinhold's metric and Ruppeiner's metric well explain this phase transition. But these explanations depend on the choice of potential. Hence the Legendre invariant GTD is used, and with the true singularities in the curvature scalar, GTD well explain the second order phase transition. All these methods together give an exact idea of all the behaviors of the Park black hole thermodynamics.

Jishnu Suresh; Tharanath R; Nijo Varghese; V C Kuriakose

2014-03-19T23:59:59.000Z

491

Could any black holes be produced at the LHC?  

E-Print Network [OSTI]

We introduce analytical quantum gravity modifications of the production cross section for terascale black holes by employing an effective ultraviolet cut off $l$. We find the new cross sections approach the usual "black disk" form at high energy, while they differ significantly near the fundamental scale from the standard increase with respect to $s$. We show that the heretofore discontinuous step function used to represent the cross section threshold can realistically be modeled by two functions representing the incoming and final parton states in a high energy collision. The growth of the cross section with collision energy is thus a unique signature of $l$ and number of spatial dimensions $d$. Contrary to the classical black disk result, our cross section is able to explain why black holes might not be observable in LHC experiments while they could be still at the reach of ultra-high energy cosmic ray events.

Jonas Mureika; Piero Nicolini; Euro Spallucci

2011-11-24T23:59:59.000Z

492

Remarks about Static Back-Reaction on Black Hole Spacetimes  

E-Print Network [OSTI]

Recently, it has been claimed that the back reaction of vacuum polarization on a black hole spacetime naturally regularizes infinities in the black hole entropy. We examine the back reaction calculation and find no such short-distance cut-off,in contradiction with these recent claims. Moreover, the intuitive expectation that the perturbative calculation breaks down near the event horizon is confirmed. The new surface gravity diverges and the metric is degenerate at the stretched horizon.

Neil J. Cornish; Janna J. Levin

1994-11-13T23:59:59.000Z

493

Black holes and structure in an oscillating universe  

Science Journals Connector (OSTI)

... a = 27 irG2 M2 / c4 is the radiation capture cross-section for a Schwarzschild black hole. This assumes that black holes accrete independently in a uniform radiation field ... cm and rA = (81/64)c?1r0>Sch s where rOSch is the initial Schwarzschild radius (c.g.s. units). Thus A?1016cm, corresponding to rA?10? ...

William C. Saslaw

1991-03-07T23:59:59.000Z

494

Tectonic evolution of the southwestern Black Sea margin, offshore Turkey  

E-Print Network [OSTI]

(continued) Page around the Aegean Sea. 39 Isopach map of the Middle-Upper Miocene sediments in the southwestern Black Sea Basin. 75 78 LIST OF TABLES TABLE I Internal seismic reflection configurations of the seismic stratigraphic units. Page 45...). Results of the most recent offshore research project (Finetti et al. , 1988), which covers the entire Black Sea basin, also support the back-arc basin model. In this study, 2D seismic reflection profiles are used to model the tectonic evolution...

Can, Emrah

2012-06-07T23:59:59.000Z

495

Overspinning a Black Hole with a Test Body  

Science Journals Connector (OSTI)

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

Ted Jacobson and Thomas P. Sotiriou

2009-09-28T23:59:59.000Z

496

On the Quantum-Corrected Black Hole Thermodynamics  

E-Print Network [OSTI]

Bekenstein-Hawking Black hole thermodynamics should be corrected to incorporate quantum gravitational effects. Generalized Uncertainty Principle(GUP) provides a perturbational framework to perform such modifications. In this paper we consider the most general form of GUP to find black holes thermodynamics in microcanonical ensemble. Our calculation shows that there is no logarithmic pre-factor in perturbational expansion of entropy. This feature will solve part of controversies in literatures regarding existence or vanishing of this pre-factor.

Kourosh Nozari; S. Hamid Mehdipour

2005-04-21T23:59:59.000Z

497

Proceedings of the black liquor research program review fifth meeting  

SciTech Connect (OSTI)

On June 14--17, 1988 the participants and invited guests of the Cooperative Program in Kraft Recovery gathered in Charleston, South Carolina, to review progress on four major black liquor research programs being executed at the Institute of Paper Chemistry, the University of Maine, the National Bureau of Standards, and the University of Florida. These programs include: (1) Black Liquor Properties; (2) Black Liquor Droplet Formation; (3) Black Liquor Nozzle Evaluation; and (4) Black Liquor Combustion. In addition to the objectives of previous meetings, this meeting made a direct attempt to gather ideas on how to improve our ability to move from new technology concepts to commercial implementation. Also attached is the agenda for the Charleston meeting. The first two days were involved with updates and reviews of the four major black liquor programs. A half day was spent discussing pathways to implementation and developing thoughts on what industry, DOE and academia could do to facilitate commercial implementation of the research results. This publication is a summary of the presentations made in Charleston and the industry responses to the research work. Readers are cautioned that the contents are in-progress updates on the status of the research and do not represent referred technical papers. Any questions regarding the content should be referred to the principal investigators of the project.

Not Available

1988-09-01T23:59:59.000Z

498

Black holes at the IceCube neutrino telescope  

Science Journals Connector (OSTI)

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

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

2007-01-09T23:59:59.000Z

499

Nearly extremal apparent horizons in simulations of merging black holes  

E-Print Network [OSTI]

The spin angular momentum $S$ of an isolated Kerr black hole is bounded by the surface area $A$ of its apparent horizon: $8\\pi S \\le A$, with equality for extremal black holes. In this paper, we explore the extremality of individual and common apparent horizons for merging, rapidly spinning binary black holes. We consider simulations of merging black holes with equal masses $M$ and initial spin angular momenta aligned with the orbital angular momentum, including new simulations with spin magnitudes up to $S/M^2 = 0.994$. We measure the area and (using approximate Killing vectors) the spin on the individual and common apparent horizons, finding that the inequality $8\\pi S extremality by computing the smallest value that Booth and Fairhurst's extremality parameter can take for any scaling. Using this lower bound, we conclude that the common horizons are at least moderately close to extremal just after they appear. Finally, following Lovelace et al. (2008), we construct quasiequilibrium binary-black-hole initial data with "overspun" marginally trapped surfaces with $8\\pi S > A$ and for which our lower bound on their Booth-Fairhurst extremality exceeds unity. These superextremal surfaces are always surrounded by marginally outer trapped surfaces (i.e., by apparent horizons) with $8\\pi Sextremality lower bound on the enclosing apparent horizon is always less than unity but can exceed the value for an extremal Kerr black hole. (Abstract abbreviated.)

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

2014-11-26T23:59:59.000Z

500

70 Images for 70 Years  

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

70 Images for 70 Years 70 Images for 70 Years 70 Images for 70 Years Los Alamos has a proud history and heritage of almost 70 years of science and innovation. The people of the Laboratory work on advanced technologies to provide the best scientific and engineering solutions to many of the nation's most crucial security challenges. Click thumbnails to enlarge. Photos arranged by most recent first, horizontal formats before vertical. See Flickr for more sizes and details. 1938 Hahn and Meitner Fission 1938 Hahn and Meitner Fission 1939 Einstein-Szilard 1939 Einstein-Szilard 1940s Main Guard Gate (671938) 1940s Main Guard Gate (671938) 1940s Security check 1940s Security check 1940 Boys Ranch School hockey on Ashley Pond 1940 Boys Ranch School hockey on Ashley Pond 1942 Fuller Lodge 1942 Fuller Lodge