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1

IA Blog Archive  

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

71 IA Blog Archive en IA News Archive http:energy.goviaia-news-archive IA News Archive

2

Category:Mason, IA | Open Energy Information  

Open Energy Info (EERE)

IA IA Jump to: navigation, search Go Back to PV Economics By Location Media in category "Mason, IA" The following 16 files are in this category, out of 16 total. SVQuickServiceRestaurant Mason IA MidAmerican Energy Co (Iowa).png SVQuickServiceRestaura... 64 KB SVFullServiceRestaurant Mason IA MidAmerican Energy Co (Iowa).png SVFullServiceRestauran... 64 KB SVHospital Mason IA MidAmerican Energy Co (Iowa).png SVHospital Mason IA Mi... 73 KB SVLargeHotel Mason IA MidAmerican Energy Co (Iowa).png SVLargeHotel Mason IA ... 72 KB SVLargeOffice Mason IA MidAmerican Energy Co (Iowa).png SVLargeOffice Mason IA... 73 KB SVMediumOffice Mason IA MidAmerican Energy Co (Iowa).png SVMediumOffice Mason I... 69 KB SVMidriseApartment Mason IA MidAmerican Energy Co (Iowa).png

3

New approaches for modeling type Ia supernovae  

E-Print Network [OSTI]

ich and J. Stein. On the thermonuclear runaway in Type IaSmall-Scale Stability of Thermonuclear Flames o in Type IaS. E. Woosley. The thermonuclear explosion of chandrasekhar

Zingale, Michael; Almgren, Ann S.; Bell, John B.; Day, Marcus S.; Rendleman, Charles A.; Woosley, Stan

2007-01-01T23:59:59.000Z

4

Abstract IA37: Clinical genomics  

Science Journals Connector (OSTI)

...Research. 15 October 2014 meeting-abstract Clinical Genomics Clinical Genomics: Oral Presentations - Invited Abstracts Abstracts...2013; San Diego, CA Abstract IA37: Clinical genomics Katherine A. Janeway Dana-Farber Cancer Institute...

Katherine A. Janeway

2014-10-15T23:59:59.000Z

5

String Landscape and Supernovae Ia  

E-Print Network [OSTI]

We present a model for the triggering of Supernovae Ia (SN Ia) by a phase transition to exact supersymmetry (susy) in the core of a white dwarf star. The model, which accomodates the data on SN Ia and avoids the problems of the standard astrophysical accretion based picture, is based on string landscape ideas and assumes that the decay of the false broken susy vacuum is enhanced at high density. In a slowly expanding susy bubble, the conversion of pairs of fermions to pairs of degenerate scalars releases a significant amount of energy which induces fusion in the surrounding normal matter shell. After cooling, the absence of degeneracy pressure causes the susy bubble to collapse to a black hole of about 0.1 solar mass or to some other stable susy object.

L. Clavelli

2011-10-09T23:59:59.000Z

6

Steamboat IA Geothermal Facility | Open Energy Information  

Open Energy Info (EERE)

IA Geothermal Facility IA Geothermal Facility Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Steamboat IA Geothermal Facility General Information Name Steamboat IA Geothermal Facility Facility Steamboat IA Sector Geothermal energy Location Information Location Washoe, Nevada Coordinates 40.5608387°, -119.6035495° 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":40.5608387,"lon":-119.6035495,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

7

THE LOCAL HOSTS OF TYPE Ia SUPERNOVAE  

SciTech Connect (OSTI)

We use multi-wavelength, matched aperture, integrated photometry from the Galaxy Evolution Explorer (GALEX), the Sloan Digital Sky Survey, and the RC3 to estimate the physical properties of 166 nearby galaxies hosting 168 well-observed Type Ia supernovae (SNe Ia). The ultraviolet (UV) imaging of local SN Ia hosts from GALEX allows a direct comparison with higher-redshift hosts measured at optical wavelengths that correspond to the rest-frame UV. Our data corroborate well-known features that have been seen in other SN Ia samples. Specifically, hosts with active star formation produce brighter and slower SNe Ia on average, and hosts with luminosity-weighted ages older than 1 Gyr produce on average more faint, fast, and fewer bright, slow SNe Ia than younger hosts. New results include that in our sample, the faintest and fastest SNe Ia occur only in galaxies exceeding a stellar mass threshold of approx10{sup 10} M{sub sun}, leading us to conclude that their progenitors must arise in populations that are older and/or more metal rich than the general SN Ia population. A low host extinction subsample hints at a residual trend in peak luminosity with host age, after correcting for light-curve shape, giving the appearance that older hosts produce less-extincted SNe Ia on average. This has implications for cosmological fitting of SNe Ia, and suggests that host age could be useful as a parameter in the fitting. Converting host mass to metallicity and computing {sup 56}Ni mass from the supernova light curves, we find that our local sample is consistent with a model that predicts a shallow trend between stellar metallicity and the {sup 56}Ni mass that powers the explosion, but we cannot rule out the absence of a trend. We measure a correlation between {sup 56}Ni mass and host age in the local universe that is shallower and not as significant as that seen at higher redshifts. The details of the age-{sup 56}Ni mass correlations at low and higher redshift imply a luminosity-weighted age threshold of approx3 Gyr for SN Ia hosts, above which they are less likely to produce SNe Ia with {sup 56}Ni masses above approx0.5 M{sub sun}.

Neill, James D.; Martin, D. Christopher; Barlow, Tom A.; Foster, Karl; Friedman, Peter G.; Morrissey, Patrick; Wyder, Ted K. [California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125 (United States); Sullivan, Mark [University of Oxford, Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH (United Kingdom); Howell, D. Andrew [Las Cumbres Observatory Global Telescope Network, 6740 Cortona Dr., Suite 102, Goleta, CA 93117 (United States); Conley, Alex [Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, ONM5S3H8 (Canada); Seibert, Mark; Madore, Barry F. [The Observatories of the Carnegie Institute of Washington, 813 Santa Barbara Street, Pasadena, CA, 91101 (United States); Neff, Susan G. [Laboratory for Astronomy and Solar Physics, NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Schiminovich, David [Department of Astronomy, Columbia University, New York, NY 10027 (United States); Bianchi, Luciana [Center for Astrophysical Sciences, Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218 (United States); Donas, Jose; Milliard, Bruno [Laboratoire d'Astrophysique de Marseille, BP 8, Traverse du Siphon, 13376 Marseille Cedex 12 (France); Heckman, Timothy M. [Department of Physics and Astronomy, Johns Hopkins University, Homewood Campus, Baltimore, MD 21218 (United States); Lee, Young-Wook [Center for Space Astrophysics, Yonsei University, Seoul 120-749 (Korea, Republic of); Rich, R. Michael [Department of Physics and Astronomy, University of California, Los Angeles, CA 90095 (United States)

2009-12-20T23:59:59.000Z

8

Supersoft Sources as SN Ia Progenitors  

E-Print Network [OSTI]

of the existence of supersoft X­ray sources. It is argued that SNe Ia are thermonuclear explosions of accreting C is that they represent thermonuclear disruptions of mass accreting white dwarfs (WDs). Thus, the basic ingredient

Greiner, Jochen

9

ETODOS NUM ERICOS EN INGENIER IA  

E-Print Network [OSTI]

CONSERVATIVOS ENERG #19; IA-MOMENTO Jos#19;e M. Goicolea Ruig#19;omez y Juan Carlos Garc#19;#16;a Orden EscuelaM #19; ETODOS NUM #19; ERICOS EN INGENIER #19; IA R. Abascal, J. Dom#19;#16;nguez y G. Bugeda (Eds.upm.es Palabras clave: Din#19;amica no lineal, mecanismos, sistemas multicuerpo exibles, energ#19;#16;a- momento

Romero, Ignacio

10

Rolling Hills (IA) | Open Energy Information  

Open Energy Info (EERE)

Rolling Hills (IA) Rolling Hills (IA) Jump to: navigation, search Name Rolling Hills (IA) Facility Rolling Hills (IA) Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner MidAmerican Energy Company Developer MidAmerican Energy Company Energy Purchaser MidAmerican Energy Company Location Massena IA Coordinates 41.230443°, -94.75459° 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":41.230443,"lon":-94.75459,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

11

A threat-based definition of IA and IA-enabled products.  

SciTech Connect (OSTI)

This paper proposes a definition of 'IA and IA-enabled products' based on threat, as opposed to 'security services' (i.e., 'confidentiality, authentication, integrity, access control or non-repudiation of data'), as provided by Department of Defense (DoD) Instruction 8500.2, 'Information Assurance (IA) Implementation.' The DoDI 8500.2 definition is too broad, making it difficult to distinguish products that need higher protection from those that do not. As a consequence the products that need higher protection do not receive it, increasing risk. The threat-based definition proposed in this paper solves those problems by focusing attention on threats, thereby moving beyond compliance to risk management. (DoDI 8500.2 provides the definitions and controls that form the basis for IA across the DoD.) Familiarity with 8500.2 is assumed.

Shakamuri, Mayuri; Schaefer, Mark A.; Campbell, Philip LaRoche

2010-09-01T23:59:59.000Z

12

A threat-based definition of IA- and IA-enabled products.  

SciTech Connect (OSTI)

This paper proposes a definition of 'IA and IA-enabled products' based on threat, as opposed to 'security services' (i.e., 'confidentiality, authentication, integrity, access control or non-repudiation of data'), as provided by Department of Defense (DoD) Instruction 8500.2, 'Information Assurance (IA) Implementation.' The DoDI 8500.2 definition is too broad, making it difficult to distinguish products that need higher protection from those that do not. As a consequence the products that need higher protection do not receive it, increasing risk. The threat-based definition proposed in this paper solves those problems by focusing attention on threats, thereby moving beyond compliance to risk management. (DoDI 8500.2 provides the definitions and controls that form the basis for IA across the DoD.) Familiarity with 8500.2 is assumed.

Shakamuri, Mayuri; Schaefer, Mark A.; Campbell, Philip LaRoche

2010-07-01T23:59:59.000Z

13

Comparison of Recent SnIa datasets  

E-Print Network [OSTI]

We rank the six latest Type Ia supernova (SnIa) datasets (Constitution (C), Union (U), ESSENCE (Davis) (E), Gold06 (G), SNLS 1yr (S) and SDSS-II (D)) in the context of the Chevalier-Polarski-Linder (CPL) parametrization $w(a)=w_0+w_1 (1-a)$, according to their Figure of Merit (FoM), their consistency with the cosmological constant ($\\Lambda$CDM), their consistency with standard rulers (Cosmic Microwave Background (CMB) and Baryon Acoustic Oscillations (BAO)) and their mutual consistency. We find a significant improvement of the FoM (defined as the inverse area of the 95.4% parameter contour) with the number of SnIa of these datasets ((C) highest FoM, (U), (G), (D), (E), (S) lowest FoM). Standard rulers (CMB+BAO) have a better FoM by about a factor of 3, compared to the highest FoM SnIa dataset (C). We also find that the ranking sequence based on consistency with $\\Lambda$CDM is identical with the corresponding ranking based on consistency with standard rulers ((S) most consistent, (D), (C), (E), (U), (G) least consistent). The ranking sequence of the datasets however changes when we consider the consistency with an expansion history corresponding to evolving dark energy $(w_0,w_1)=(-1.4,2)$ crossing the phantom divide line $w=-1$ (it is practically reversed to (G), (U), (E), (S), (D), (C)). The SALT2 and MLCS2k2 fitters are also compared and some peculiar features of the SDSS-II dataset when standardized with the MLCS2k2 fitter are pointed out. Finally, we construct a statistic to estimate the internal consistency of a collection of SnIa datasets. We find that even though there is good consistency among most samples taken from the above datasets, this consistency decreases significantly when the Gold06 (G) dataset is included in the sample.

J. C. Bueno Sanchez; S. Nesseris; L. Perivolaropoulos

2009-10-01T23:59:59.000Z

14

Category:Des Moines, IA | Open Energy Information  

Open Energy Info (EERE)

IA IA Jump to: navigation, search Go Back to PV Economics By Location Media in category "Des Moines, IA" The following 16 files are in this category, out of 16 total. SVFullServiceRestaurant Des Moines IA MidAmerican Energy Co (Iowa).png SVFullServiceRestauran... 64 KB SVQuickServiceRestaurant Des Moines IA MidAmerican Energy Co (Iowa).png SVQuickServiceRestaura... 64 KB SVHospital Des Moines IA MidAmerican Energy Co (Iowa).png SVHospital Des Moines ... 73 KB SVLargeHotel Des Moines IA MidAmerican Energy Co (Iowa).png SVLargeHotel Des Moine... 72 KB SVLargeOffice Des Moines IA MidAmerican Energy Co (Iowa).png SVLargeOffice Des Moin... 73 KB SVMediumOffice Des Moines IA MidAmerican Energy Co (Iowa).png SVMediumOffice Des Moi... 69 KB SVMidriseApartment Des Moines IA MidAmerican Energy Co (Iowa).png

15

DOE - Office of Legacy Management -- Bendix Aviation Corp Pioneer Div - IA  

Office of Legacy Management (LM)

Bendix Aviation Corp Pioneer Div - Bendix Aviation Corp Pioneer Div - IA 05 FUSRAP Considered Sites Site: BENDIX AVIATION CORP., PIONEER DIV. (IA.05 ) Eliminated from consideration under FUSRAP Designated Name: Not Designated Alternate Name: Pioneer Division, Bendix Aviation Corporation Bendix Aviation Corporation Bendix Pioneer Division IA.05-1 IA.05-2 IA.05-3 Location: Davenport , Iowa IA.05-1 Evaluation Year: 1990 IA.05-2 IA.05-4 Site Operations: Conducted studies to investigate the feasibility of using sonic cleaning equipment to decontaminate uranium contaminated drums. IA.05-1 Site Disposition: Eliminated - Potential for contamination considered remote based on limited operations at the site IA.05-2 IA.05-4 IA.05-5 Radioactive Materials Handled: Yes Primary Radioactive Materials Handled: Uranium IA.05-1

16

DOE - Office of Legacy Management -- Titus Metals - IA 04  

Office of Legacy Management (LM)

from consideration under FUSRAP Also see Documents Related to TITUS METALS IA.04-1 - Argonne National Laboratory Memorandum; Lonergan to Novak; Subject: Extrusion of Billets,...

17

Conformal cosmological model and SNe Ia data  

SciTech Connect (OSTI)

Now there is a huge scientific activity in astrophysical studies and cosmological ones in particular. Cosmology transforms from a pure theoretical branch of science into an observational one. All the cosmological models have to pass observational tests. The supernovae type Ia (SNe Ia) test is among the most important ones. If one applies the test to determine parameters of the standard Friedmann-Robertson-Walker cosmological model one can conclude that observations lead to the discovery of the dominance of the {Lambda} term and as a result to an acceleration of the Universe. However, there are big mysteries connected with an origin and an essence of dark matter (DM) and the {Lambda} term or dark energy (DE). Alternative theories of gravitation are treated as a possible solution of DM and DE puzzles. The conformal cosmological approach is one of possible alternatives to the standard {Lambda}CDM model. As it was noted several years ago, in the framework of the conformal cosmological approach an introduction of a rigid matter can explain observational data without {Lambda} term (or dark energy). We confirm the claim with much larger set of observational data.

Zakharov, A. F., E-mail: zakharov@itep.ru [National Astronomical Observatories of Chinese Academy of Sciences (China); Pervushin, V. N. [Joint Institute for Nuclear Research, Bogoliubov Laboratory for Theoretical Physics (Russian Federation)

2012-11-15T23:59:59.000Z

18

Type Ia Supernova Explosion: Gravitationally Confined Detonation  

Science Journals Connector (OSTI)

We present a new mechanism for Type Ia supernova explosions in massive white dwarfs. The scenario follows from relaxing assumptions of symmetry and involves a detonation born near the stellar surface. The explosion begins with an essentially central ignition of a deflagration that results in the formation of a buoyancy-driven bubble of hot material that reaches the stellar surface at supersonic speeds. The bubble breakout laterally accelerates fuel-rich outer stellar layers. This material, confined by gravity to the white dwarf, races along the stellar surface and is focused at the location opposite to the point of the bubble breakout. These streams of nuclear fuel carry enough mass and energy to trigger a detonation just above the stellar surface that will incinerate the white dwarf and result in an energetic explosion. The stellar expansion following the deflagration redistributes mass in a way that ensures production of intermediate-mass and iron group elements with ejecta having a strongly layered structure and a mild amount of asymmetry following from the early deflagration phase. This asymmetry, combined with the amount of stellar expansion determined by details of the evolution (principally the energetics of deflagration, timing of detonation, and structure of the progenitor), can be expected to create a family of mildly diverse Type Ia supernova explosions.

T. Plewa; A. C. Calder; D. Q. Lamb

2004-01-01T23:59:59.000Z

19

The distant type Ia supernova rate  

SciTech Connect (OSTI)

We present a measurement of the rate of distant Type Ia supernovae derived using 4 large subsets of data from the Supernova Cosmology Project. Within this fiducial sample,which surveyed about 12 square degrees, thirty-eight supernovae were detected at redshifts 0.25--0.85. In a spatially flat cosmological model consistent with the results obtained by the Supernova Cosmology Project, we derive a rest-frame Type Ia supernova rate at a mean red shift z {approx_equal} 0.55 of 1.53 {sub -0.25}{sub -0.31}{sup 0.28}{sup 0.32} x 10{sup -4} h{sup 3} Mpc{sup -3} yr{sup -1} or 0.58{sub -0.09}{sub -0.09}{sup +0.10}{sup +0.10} h{sup 2} SNu(1 SNu = 1 supernova per century per 10{sup 10} L{sub B}sun), where the first uncertainty is statistical and the second includes systematic effects. The dependence of the rate on the assumed cosmological parameters is studied and the redshift dependence of the rate per unit comoving volume is contrasted with local estimates in the context of possible cosmic star formation histories and progenitor models.

Pain, R.; Fabbro, S.; Sullivan, M.; Ellis, R.S.; Aldering, G.; Astier, P.; Deustua, S.E.; Fruchter, A.S.; Goldhaber, G.; Goobar, A.; Groom, D.E.; Hardin, D.; Hook, I.M.; Howell, D.A.; Irwin, M.J.; Kim, A.G.; Kim, M.Y.; Knop, R.A.; Lee, J.C.; Perlmutter, S.; Ruiz-Lapuente, P.; Schahmaneche, K.; Schaefer, B.; Walton, N.A.

2002-05-20T23:59:59.000Z

20

The Distant Type Ia Supernova Rate  

DOE R&D Accomplishments [OSTI]

We present a measurement of the rate of distant Type Ia supernovae derived using 4 large subsets of data from the Supernova Cosmology Project. Within this fiducial sample, which surveyed about 12 square degrees, thirty-eight supernovae were detected at redshifts 0.25--0.85. In a spatially flat cosmological model consistent with the results obtained by the Supernova Cosmology Project, we derive a rest-frame Type Ia supernova rate at a mean red shift z {approx_equal} 0.55 of 1.53 {sub -0.25}{sub -0.31}{sup 0.28}{sup 0.32} x 10{sup -4} h{sup 3} Mpc{sup -3} yr{sup -1} or 0.58{sub -0.09}{sub -0.09}{sup +0.10}{sup +0.10} h{sup 2} SNu(1 SNu = 1 supernova per century per 10{sup 10} L{sub B}sun), where the first uncertainty is statistical and the second includes systematic effects. The dependence of the rate on the assumed cosmological parameters is studied and the redshift dependence of the rate per unit comoving volume is contrasted with local estimates in the context of possible cosmic star formation histories and progenitor models.

Pain, R.; Fabbro, S.; Sullivan, M.; Ellis, R. S.; Aldering, G.; Astier, P.; Deustua, S. E.; Fruchter, A. S.; Goldhaber, G.; Goobar, A.; Groom, D. E.; Hardin, D.; Hook, I. M.; Howell, D. A.; Irwin, M. J.; Kim, A. G.; Kim, M. Y.; Knop, R. A.; Lee, J. C.; Perlmutter, S.; Ruiz-Lapuente, P.; Schahmaneche, K.; Schaefer, B.; Walton, N. A.

2002-05-28T23:59:59.000Z

Note: This page contains sample records for the topic "livermore ia ia" 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

Intermediate-band Photometry of Type Ia Supernovae  

E-Print Network [OSTI]

We present optical light curves of five Type Ia supernovae (2002er, 2002fk, 2003cg, 2003du, 2003fk). The photometric observations were performed in a set of intermediate-band filters. SNe 2002er, 2003du appear to be normal SN Ia events with similar light curve shapes, while SN 2003kf shows the behavior of a brighter SN Ia with slower decline rate after maximum. The light curves of SN 2003cg is unusual; they show a fast rise and dramatic decline near maximum and do not display secondary peak at longer wavelengths during 15-30 days after maximum light. This suggests that SN 2003cg is likely to be an intrinsically subluminous, 91bg-like SN Ia. Exploration of SN Ia feature lines through intermediate-band photometry is briefly discussed.

Wang, X; Zhang, T; Li, Z; Wang, Xiaofeng; Zhou, Xu; Zhang, Tianmeng; Li, Zongwei

2004-01-01T23:59:59.000Z

22

Visualizing Type Ia Supernova Explosions at NERSC  

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

Supernova Explosions Supernova Explosions Visualizing Type Ia Supernova Explosions Childs1a-Supernovasm.png Deep inside a dying star in a galaxy far, far away, a carbon fusion flame ignites. Ignition may happen in the middle or displaced slightly to one side, but this simulation explores the consequences of central ignition. In a localized hot spot, represented here by a deformed sphere with an average radius of 100 km, carbon is assumed to have already fused to iron, producing hot ash (~10 billion K) with a density about 20% less than its surroundings. As the burning progresses, this hot buoyant ash rises up and interacts with cold fuel. Rayleigh-Taylor fingers give rise to shear and turbulence, which interacts with the flame, causing it to move faster. In about 2 seconds, the energy released blows the entire white dwarf star up,

23

DOE - Office of Legacy Management -- Iowa Army Ammunition Plant - IA 02  

Office of Legacy Management (LM)

Army Ammunition Plant - IA 02 Army Ammunition Plant - IA 02 FUSRAP Considered Sites Iowa Army Ammunition Plant, IA Alternate Name(s): Burlington Ordnance Plant Iowa Ordnance Plant Silas Mason Company IA.02-3 Location: Located in Township 70 North, Range 3 West, Section 32, 5th Principal Meridian, Des Moines County, Burlington, Iowa IA.02-1 IA.02-5 Historical Operations: Assembled nuclear weapons, primarily high explosive components and conducted explosives testing using the high explosive components and depleted uranium. AEC and ERDA operations conducted under permit from the Department of the Army. IA.02-3 IA.02-4 Eligibility Determination: Eligible IA.02-5 Radiological Survey(s): Assessment Survey IA.02-2 Site Status: Cleanup pending by U.S. Army Corps of Engineers. IA.02-6

24

UMore Ph IA CR Report 7-8-10.pdf  

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

PHASE IA ARCHAEOLOGICAL AND PHASE IA ARCHAEOLOGICAL AND ARCHITECTURAL HISTORY SURVEY FOR THE UMORE PARK RESEARCH WIND TURBINE PROJECT, DAKOTA COUNTY, MINNESOTA SHPO File No. Pending Client No. Pending The 106 Group Project No. 10-18 Submitted to: Barr Engineering Company 4700 West 77th Street Minneapolis, MN 55435-4803 Submitted by: The 106 Group Ltd. The Dacotah Building 370 Selby Avenue St. Paul, MN 55102 Principal Investigators: AnneKetz, M.A., RPA Greg Mathis, M.C.R.P. Report Authors: Mark Doperalski, B.S. Miranda Van Vleet, M.H.P July 2010 UMore Park Wind Turbine Project Phase IA Archaeological and Architectural History Survey Page i MANAGEMENT SUMMARY During May of 2010, The 106 Group Ltd. (106 Group) conducted a Phase IA archaeological and architectural history survey for the University of Minnesota Outreach, Research, and

25

CIRCUMSTELLAR ABSORPTION IN DOUBLE DETONATION TYPE Ia SUPERNOVAE  

SciTech Connect (OSTI)

Upon formation, degenerate He core white dwarfs are surrounded by a radiative H-rich layer primarily supported by ideal gas pressure. In this Letter, we examine the effect of this H-rich layer on mass transfer in He+C/O double white dwarf binaries that will eventually merge and possibly yield a Type Ia supernova (SN Ia) in the double detonation scenario. Because its thermal profile and equation of state differ from the underlying He core, the H-rich layer is transferred stably onto the C/O white dwarf prior to the He core's tidal disruption. We find that this material is ejected from the binary system and sweeps up the surrounding interstellar medium hundreds to thousands of years before the SN Ia. The close match between the resulting circumstellar medium profiles and values inferred from recent observations of circumstellar absorption in SNe Ia gives further credence to the resurgent double detonation scenario.

Shen, Ken J. [Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (United States); Guillochon, James [Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States); Foley, Ryan J., E-mail: kenshen@astro.berkeley.edu [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)

2013-06-20T23:59:59.000Z

26

Abstract IA14: Functional genomics and cancer vulnerabilities  

Science Journals Connector (OSTI)

...Cancer Research. November 2014 meeting-abstract Genomics Genomics: Oral Presentations - Invited Abstracts Abstracts...2013; San Diego, CA Abstract IA14: Functional genomics and cancer vulnerabilities William C. Hahn Dana-Farber...

William C. Hahn

2014-11-01T23:59:59.000Z

27

EARLY EMISSION FROM TYPE Ia SUPERNOVAE  

SciTech Connect (OSTI)

A unique feature of deflagration-to-detonation (DDT) white dwarf explosion models of supernovae of type Ia is the presence of a strong shock wave propagating through the outer envelope. We consider the early emission expected in such models, which is produced by the expanding shock-heated outer part of the ejecta and precedes the emission driven by radioactive decay. We expand on earlier analyses by considering the modification of the pre-detonation density profile by the weak shocks generated during the deflagration phase, the time evolution of the opacity, and the deviation of the post-shock equation of state from that obtained for radiation pressure domination. A simple analytic model is presented and shown to provide an acceptable approximation to the results of one-dimensional numerical DDT simulations. Our analysis predicts a {approx}10{sup 3} s long UV/optical flash with a luminosity of {approx}1 to {approx}3 Multiplication-Sign 10{sup 39} erg s{sup -1}. Lower luminosity corresponds to faster (turbulent) deflagration velocity. The luminosity of the UV flash is predicted to be strongly suppressed at t > t{sub drop} {approx} 1 hr due to the deviation from pure radiation domination.

Rabinak, Itay; Waxman, Eli [Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 76100 (Israel); Livne, Eli, E-mail: itay.rabinak@weizmann.ac.il [Racah Institute of Physics, Hebrew University, Jerusalem (Israel)

2012-09-20T23:59:59.000Z

28

The 1.05-?m feature in the spectrum of the Type Ia supernova 1994D: He in SNe Ia?  

Science Journals Connector (OSTI)

......SNe Ia). Although the agreed basic scenario is thermonuclear fusion within a white dwarf (WD), the process leading...a pressure wave into the WD which then triggers thermonuclear fusion in the core. In this scenario, explosion can......

P. A. Mazzali; L. B. Lucy

1998-04-01T23:59:59.000Z

29

IA REP0 SAND85-2809 Unlimited Release UC-92A  

Office of Scientific and Technical Information (OSTI)

IA REP0 SAND85-2809 Unlimited Release UC-92A IA REP0 SAND85-2809 Unlimited Release UC-92A Printed July 1986 High Energy Gas Fracture Experiments in Fluid-Filled Boreholes-Potential Geothermal Application J. F. Cuderman, T. Y. Chu, J. Jung, R. D. Jacobson Prepared by Sandia National Laboratories Albuquerque, New Mexico 87 185 and Livermore, California 94550 for the United States Department of Energy under Contract DE-AC04-76DP00789 DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency Thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process

30

Simulations of Turbulent Thermonuclear Burning in Type Ia Supernovae  

E-Print Network [OSTI]

Type Ia supernovae have recently received considerable attention because it appears that they can be used as "standard candles" to measure cosmic distances out to billions of light years away from us. Observations of type Ia supernovae seem to indicate that we are living in a universe that started to accelerate its expansion when it was about half its present age. These conclusions rest primarily on phenomenological models which, however, lack proper theoretical understanding, mainly because the explosion process, initiated by thermonuclear fusion of carbon and oxygen into heavier elements, is difficult to simulate even on supercomputers. Here, we investigate a new way of modeling turbulent thermonuclear deflagration fronts in white dwarfs undergoing a type Ia supernova explosion. Our approach is based on a level set method which treats the front as a mathematical discontinuity and allows for full coupling between the front geometry and the flow field. New results of the method applied to the problem of type Ia supernovae are obtained. It is shown that in 2-D with high spatial resolution and a physically motivated subgrid scale model for the nuclear flames numerically "converged" results can be obtained, but for most initial conditions the stars do not explode. In contrast, simulations in 3-D, do give the desired explosions and many of their properties, such as the explosion energies, lightcurves and nucleosynthesis products, are in very good agreement with observed type Ia supernovae.

W. Hillebrandt; M. Reinecke; W. Schmidt; F. K. Roepke; C. Travaglio; J. C. Niemeyer

2004-05-11T23:59:59.000Z

31

Type Ia Supernovae Yielding Distances with 3-4% Precision  

E-Print Network [OSTI]

The luminosities of Type Ia supernovae (SN), the thermonuclear explosions of white dwarf stars, vary systematically with their intrinsic color and light-curve decline rate. These relationships have been used to calibrate their luminosities to within ~0.14-0.20 mag from broadband optical light curves, yielding individual distances accurate to ~7-10%. Here we identify a subset of SN Ia that erupt in environments having high ultraviolet surface brightness and star-formation surface density. When we apply a steep model extinction law, these SN can be calibrated to within ~0.065-0.075 mag, corresponding to ~3-4% in distance -- the best yet with SN Ia by a substantial margin. The small scatter suggests that variations in only one or two progenitor properties account for their light-curve-width/color/luminosity relation.

Kelly, Patrick L; Burke, David L; Hicken, Malcolm; Ganeshalingam, Mohan; Zheng, Weikang

2014-01-01T23:59:59.000Z

32

Signatures of A Companion Star in Type Ia Supernovae  

E-Print Network [OSTI]

While type Ia Supernovae (SNe Ia) have been used as precise cosmological distance indicators, their progenitor systems remain unresolved. One of the key questions is if there is a non-degenerate companion star at the time of a thermonuclear explosion of a white dwarf (WD). In this paper, we investigate if an interaction between the SN ejecta and the companion star may result in observable footprints around the maximum brightness and thereafter, by performing multi-dimensional radiation transfer simulations based on hydrodynamic simulations of the interaction. We find that such systems result in variations in various observational characteristics due to different viewing directions, while the predicted behaviors (redder and fainter for the companion direction) are opposite to what were suggested by the previous study. The variations are generally modest and within observed scatters. However, the model predicts trends between some observables different from observationally derived, thus a large sample of SNe Ia...

Maeda, Keiichi; Shigeyama, Toshikazu

2014-01-01T23:59:59.000Z

33

Double degenerates and progenitors of supernovae type Ia  

E-Print Network [OSTI]

We report on systematic radial velocity surveys for white dwarf - white dwarf binaries (double degenerates - DDs) including SPY (ESO Supernovae Ia progenitor survey) recently carried out at the VLT. A large sample of DD will allow us to put strong constrains on the phases of close binary evolution of the progenitor systems and to perform an observational test of the DD scenario for supernovae of type Ia. We explain how parameters of the binaries can be derived from various methods. Results for a sample of DDs are presented and discussed.

R. Napiwotzki; L. Yungelson; G. Nelemans; T. R. Marsh; B. Leibundgut; A. Renzini; D. Homaier; D. Koester; S. Moehler; N. Christlieb; D. Reimers; H. Drechsel; U. Heber; C. Karl; E. -M. Pauli

2004-03-25T23:59:59.000Z

34

Search for double degenerate progenitors of supernovae type Ia with SPY  

E-Print Network [OSTI]

We report on a large survey for double degenerate (DD) binaries as potential progenitors of type Ia supernovae with the UVES spectrograph at the ESO VLT (ESO SN Ia Progenitor surveY - SPY).

R. Napiwotzki; H. Drechsel; U. Heber; C. Karl; E. -M. Pauli; N. Christlieb; H. -J. Hagen; D. Reimers; D. Koester; S. Moehler; D. Homeier; B. Leibundgut; A. Renzini; T. R. Marsh; G. Nelemans; L. Yungelson

2002-10-07T23:59:59.000Z

35

Spectral Observations and Analyses of Low-Redshift Type Ia Supernovae  

E-Print Network [OSTI]

1.3.2 Thermonuclear Supernovae . . . . . . . . 1.4 Why WriteIa are the result of thermonuclear explosions of C/O whiteIa are the result of thermonuclear explosions of C/O white

Silverman, Jeffrey Michael

2011-01-01T23:59:59.000Z

36

INDECOMPOSABLE RACKS OF ORDER p 2 MAT IAS GRA  

E-Print Network [OSTI]

INDECOMPOSABLE RACKS OF ORDER p 2 MAT ?? IAS GRA ? NA Abstract. We classify indecomposable racks order is trivial. 1. Introduction Racks and quandles have been considered by G. Wraith and J. Conway categories, one is immediately led to the notion of a rack. On the other hand, in [ESS, EGS, S] and [LYZ1

Graña, Matías

37

INCOMPLETE CARBON-OXYGEN DETONATION IN TYPE Ia SUPERNOVAE  

SciTech Connect (OSTI)

Incomplete carbon-oxygen detonation with reactions terminating after burning of C{sup 12} in the leading C{sup 12} + C{sup 12} reaction (C-detonation) may occur in the low-density outer layers of white dwarfs exploding as Type Ia supernovae (SNe Ia). Previous studies of carbon-oxygen detonation structure and stability at low densities were performed under the assumption that the velocity of a detonation wave is derived from complete burning of carbon and oxygen to iron. In fact, at densities {rho} {<=} 10{sup 6} g cm{sup -3} the detonation in SNe Ia may release less than a half of the available nuclear energy. In this paper, we study basic properties of such detonations. We find that the length of an unsupported steady-state C-detonation is {approx_equal}30-100 times greater than previously estimated and that the decreased energy has a drastic effect on the detonation stability. In contrast to complete detonations which are one-dimensionally stable, C-detonations may be one-dimensionally unstable and propagate by periodically re-igniting themselves via spontaneous burning. The re-ignition period at {rho} {<=} 10{sup 6} g cm{sup -3} is estimated to be greater than the timescale of an SN Ia explosion. This suggests that propagation and quenching of C-detonations at these densities could be affected by the instability. Potential observational implications of this effect are discussed.

Dominguez, Inma [Departamento de Fisica Teorica y del Cosmos, University of Granada, 18071 Granada (Spain); Khokhlov, Alexei [Department of Astronomy and Astrophysics and the Enrico Fermi Institute, University of Chicago, Chicago, IL 60637 (United States)

2011-04-01T23:59:59.000Z

38

The EqIA Publishing Template Impact Assessment Summary  

E-Print Network [OSTI]

The EqIA Publishing Template Impact Assessment Summary 1. Name of policy, function or service. Bedgebury 5 year strategy and development plan. This is a partial assessment. 2. Purpose and aims with ETWF: Sustainable Resource, Climate Change, Natural Environment, Quality of Life, Business and Markets

39

HOSPITALITY AND TOURISM MANAGEMENT MAJOR Virgu1iaTech  

E-Print Network [OSTI]

Hospitality Facilities Planning and Methods I (3) Management (3) #HTM 3484 Socio-Cultural Impacts of Tourism 4414 Food and Beverage Management (Pre: HTM 3414) * #HTM 4464 Human Resources Management in HospHOSPITALITY AND TOURISM MANAGEMENT MAJOR Virgu1iaTech Panplil College of BusIness Department

Virginia Tech

40

Circumstellar interaction of the type Ia supernova 2002ic  

Science Journals Connector (OSTI)

......with arguments in favour of a high-energy SN Ia event in this case, raises...WD explosion with a high kinetic energy of ejecta. The SN 1.5 origin of...2002ic-like events requires an accurate energy audit, for which the direct detection......

N. N. Chugai; R. A. Chevalier; P. Lundqvist

2004-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "livermore ia ia" 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

Thermonuclear supernova models, and observations of Type Ia supernovae  

E-Print Network [OSTI]

In this paper, we review the present state of theoretical models of thermonuclear supernovae, and compare their predicitions with the constraints derived from observations of Type Ia supernovae. The diversity of explosion mechanisms usually found in one-dimensional simulations is a direct consequence of the impossibility to resolve the flame structure under the assumption of spherical symmetry. Spherically symmetric models have been successful in explaining many of the observational features of Type Ia supernovae, but they rely on two kinds of empirical models: one that describes the behaviour of the flame on the scales unresolved by the code, and another that takes account of the evolution of the flame shape. In contrast, three-dimensional simulations are able to compute the flame shape in a self-consistent way, but they still need a model for the propagation of the flame in the scales unresolved by the code. Furthermore, in three dimensions the number of degrees of freedom of the initial configuration of the white dwarf at runaway is much larger than in one dimension. Recent simulations have shown that the sensitivity of the explosion output to the initial conditions can be extremely large. New paradigms of thermonuclear supernovae have emerged from this situation, as the Pulsating Reverse Detonation. The resolution of all these issues must rely on the predictions of observational properties of the models, and their comparison with current Type Ia supernova data, including X-ray spectra of Type Ia supernova remnants.

E. Bravo; C. Badenes; D. Garcia-Senz

2004-12-07T23:59:59.000Z

42

An Analysis of Department of Defense Instruction 8500.2 'Information Assurance (IA) Implementation.'  

SciTech Connect (OSTI)

The Department of Defense (DoD) provides its standard for information assurance in its Instruction 8500.2, dated February 6, 2003. This Instruction lists 157 'IA Controls' for nine 'baseline IA levels.' Aside from distinguishing IA Controls that call for elevated levels of 'robustness' and grouping the IA Controls into eight 'subject areas' 8500.2 does not examine the nature of this set of controls, determining, for example, which controls do not vary in robustness, how this set of controls compares with other such sets, or even which controls are required for all nine baseline IA levels. This report analyzes (1) the IA Controls, (2) the subject areas, and (3) the Baseline IA levels. For example, this report notes that there are only 109 core IA Controls (which this report refers to as 'ICGs'), that 43 of these core IA Controls apply without variation to all nine baseline IA levels and that an additional 31 apply with variations. This report maps the IA Controls of 8500.2 to the controls in NIST 800-53 and ITGI's CoBIT. The result of this analysis and mapping, as shown in this report, serves as a companion to 8500.2. (An electronic spreadsheet accompanies this report.)

Campbell, Philip LaRoche

2012-01-01T23:59:59.000Z

43

Learning from the scatter in type Ia supernovae  

SciTech Connect (OSTI)

Type Ia Supernovae are standard candles so their mean apparent magnitude has been exploited to learn about the redshift-distance relationship. Besides intrinsic scatter in this standard candle, additional scatter is caused by gravitational magnification by large scale structure. Here we probe the dependence of this dispersion on cosmological parameters and show that information about the amplitude of clustering, {sigma}{sub 8}, is contained in the scatter. In principle, it will be possible to constrain {sigma}{sub 8} to within 5% with observations of 2000 Type Ia Supernovae. We identify three sources of systematic error - evolution of intrinsic scatter, baryon contributions to lensing, and non-Gaussianity of lensing - which will make this measurement difficult.

Dodelson, Scott [Particle Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510-0500 (United States); Department of Astronomy and Astrophysics, University of Chicago, Chicago, Illinois 60637-1433 (United States); Vallinotto, Alberto [Particle Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510-0500 (United States); Department of Physics, The University of Chicago, Chicago, Illinois 60637-1433 (United States)

2006-09-15T23:59:59.000Z

44

RADIOACTIVELY POWERED RISING LIGHT CURVES OF TYPE Ia SUPERNOVAE  

SciTech Connect (OSTI)

The rising luminosity of the recent, nearby supernova 2011fe shows a quadratic dependence with time during the first Almost-Equal-To 0.5-4 days. In addition, studies of the composite light curves formed from stacking together many Type Ia supernovae (SNe Ia) have found similar power-law indices for the rise, but may also show some dispersion that may indicate diversity. I explore what range of power-law rises are possible due to the presence of radioactive material near the surface of the exploding white dwarf (WD). I summarize what constraints such a model places on the structure of the progenitor and the distribution and velocity of ejecta. My main conclusion is that for the inferred explosion time for SN 2011fe, its rise requires an increasing mass fraction X {sub 56} Almost-Equal-To (4-6) Multiplication-Sign 10{sup -2} of {sup 56}Ni distributed between a depth of Almost-Equal-To 10{sup -2} and 0.3 M {sub Sun} below the WD's surface. Radioactive elements this shallow are not found in simulations of a single C/O detonation. Scenarios that may produce this material include helium-shell burning during a double-detonation ignition, a gravitationally confined detonation, and a subset of deflagration to detonation transition models. In general, the power-law rise can differ from quadratic depending on the details of the velocity, density, and radioactive deposition gradients in a given event. Therefore, comparisons of this work with observed bolometric rises of SNe Ia would place strong constraints on the properties of the shallow outer layers, providing important clues for identifying the elusive progenitors of SNe Ia.

Piro, Anthony L., E-mail: piro@caltech.edu [Theoretical Astrophysics, California Institute of Technology, 1200 East California Boulevard, M/C 350-17, Pasadena, CA 91125 (United States)

2012-11-10T23:59:59.000Z

45

The Diversity of Variations in the Spectra of Type Ia Supernovae  

E-Print Network [OSTI]

for the degree of DOCTOR OF PHILOSOPHY Approved by: Chair of Committee, Lifan Wang Committee Members, Nicholas Suntze George Kattawar Sean McDeavitt Head of Department, George R. Welch August 2012 Major Subject: Physics iii ABSTRACT The Diversity... of Variations in the Spectra of Type Ia Supernovae. (August 2012) Andrew James Wagers, B.A., Berea College; M.S., Stephen F. Austin State University Chair of Advisory Committee: Dr. Lifan Wang Type Ia supernovae (SNe Ia) are currently the best probe...

Wagers, Andrew James

2012-10-19T23:59:59.000Z

46

Experto Universitario Java Enterprise 2012-2013 Depto. Ciencia de la Computacin e IA  

E-Print Network [OSTI]

Experto Universitario Java Enterprise © 2012-2013 Depto. Ciencia de la Computación e IA Lenguaje Lenguaje Java Avanzado © 2012-2013 Depto. Ciencia de la Computación e IA Lenguaje Java 2 Índice. Ciencia de la Computación e IA Lenguaje Java 3 Java · Java es un lenguaje OO creado por Sun Microsystems

Escolano, Francisco

47

Experto Universitario Java Enterprise 2012-2013 Depto. Ciencia de la Computacin e IA  

E-Print Network [OSTI]

Experto Universitario Java Enterprise © 2012-2013 Depto. Ciencia de la Computación e IA Lenguaje Avanzado © 2012-2013 Depto. Ciencia de la Computación e IA Depuración y logs - 2 · El depurador de Eclipse Enterprise Lenguaje Java Avanzado © 2012-2013 Depto. Ciencia de la Computación e IA Depuración y logs - 3 El

Escolano, Francisco

48

Teor'ia de Grupos y Mec'anica Qu'antica Luis A. Seco  

E-Print Network [OSTI]

determinado por el Hamiltoniano de la energ'ia, un operador que, actuando sobre una funci'on /(x 1 ; : : : ; xTeor'ia de Grupos y Mec'anica Qu'antica Luis A. Seco Universidad de Toronto. Notas del curso; Teor'ia de Grupos y Mec'anica Cu'antica, L. Seco. U.I.M.P. La Coru~na, 27 Junio -- 1 Julio, 1994

Seco, Luis A.

49

Turbulence-Flame Interactions in Type Ia Supernovae  

E-Print Network [OSTI]

The large range of time and length scales involved in type Ia supernovae (SN Ia) requires the use of flame models. As a prelude to exploring various options for flame models, we consider, in this paper, high-resolution three-dimensional simulations of the small-scale dynamics of nuclear flames in the supernova environment in which the details of the flame structure are fully resolved. The range of densities examined, 1 to $8 \\times 10^7$ g cm$^{-3}$, spans the transition from the laminar flamelet regime to the distributed burning regime where small scale turbulence disrupts the flame. The use of a low Mach number algorithm facilitates the accurate resolution of the thermal structure of the flame and the inviscid turbulent kinetic energy cascade, while implicitly incorporating kinetic energy dissipation at the grid-scale cutoff. For an assumed background of isotropic Kolmogorov turbulence with an energy characteristic of SN Ia, we find a transition density between 1 and $3 \\times 10^7$ g cm$^{-3}$ where the nature of the burning changes qualitatively. By $1 \\times 10^7$ g cm$^{-3}$, energy diffusion by conduction and radiation is exceeded, on the flame scale, by turbulent advection. As a result, the effective Lewis Number approaches unity. That is, the flame resembles a laminar flame, but is turbulently broadened with an effective diffusion coefficient, $D_T \\sim u' l$, where $u'$ is the turbulent intensity and $l$ is the integral scale. For the larger integral scales characteristic of a real supernova, the flame structure is predicted to become complex and unsteady. Implications for a possible transition to detonation are discussed.

A. J. Aspden; J. B. Bell; M. S. Day; S. E. Woosley; M. Zingale

2008-11-17T23:59:59.000Z

50

The Recurrent Nova U Scorpii - A Type Ia Supernova Progenitor  

E-Print Network [OSTI]

We derive the mass of the white dwarf in the eclipsing recurrent nova U Sco from the radial velocity semi-amplitudes of the primary and secondary stars. Our results give a high white dwarf mass of M_1 = 1.55 \\pm 0.24M_\\odot, consistent with the thermonuclear runaway model of recurrent nova outbursts. We confirm that U Sco is the best Type Ia supernova progenitor known, and predict that the time to explosion is within ~700,000 years.

T. D. Thoroughgood; V. S. Dhillon; S. P. Littlefair; T. R. Marsh; D. A. Smith

2001-09-28T23:59:59.000Z

51

Tension in the Recent Type Ia Supernovae Datasets  

E-Print Network [OSTI]

In the present work, we investigate the tension in the recent Type Ia supernovae (SNIa) datasets Constitution and Union. We show that they are in tension not only with the observations of the cosmic microwave background (CMB) anisotropy and the baryon acoustic oscillations (BAO), but also with other SNIa datasets such as Davis and SNLS. Then, we find the main sources responsible for the tension. Further, we make this more robust by employing the method of random truncation. Based on the results of this work, we suggest two truncated versions of the Union and Constitution datasets, namely the UnionT and ConstitutionT SNIa samples, whose behaviors are more regular.

Hao Wei

2010-04-07T23:59:59.000Z

52

KPD1930+2752 - a candidate Type Ia supernova progenitor  

E-Print Network [OSTI]

We present spectra of the pulsating sdB star KPD1930+2752 which confirm that this star is a binary. The radial velocities measured from the H-alpha and HeI6678 spectral lines vary sinusoidally with the same period (2h 17m) as the ellipsoidal variability seen by Billeres et al. (2000). The amplitude of the orbital motion (349.3+-2.7 km/s) combined with the canonical mass for sdB stars (0.5 solar masses) implies a total mass for the binary of 1.47+-0.01 solar masses The unseen companion star is almost certainly a white dwarf star. The binary will merge within about 200 million years due to gravitational wave radiation. The accretion of helium and other elements heavier than hydrogen onto the white dwarf which then exceeds the Chandrasekhar mass (1.4 solar masses) is a viable model for the cause of Type Ia supernovae. KPD1930+2752 is the first star to be discovered which is a good candidate for the progenitor of a Type Ia supernova of this type which will merge on an astrophysically interesting timescale.

P. F. L. Maxted; T. R. Marsh; R. C. North

2000-07-18T23:59:59.000Z

53

Search for progenitors of supnernovae type Ia with SPY  

E-Print Network [OSTI]

We have started a large survey for double degenerate (DD) binaries as potential progenitors of type Ia supernovae with the UVES spectrograph at the ESO VLT (ESO SN Ia Progenitor surveY - SPY). About 400 white dwarfs were checked for radial velocity variations during the first 15 months of this project, twice the number of white dwarfs investigated during the last 20 years. We give an overview of the SPY project and present first results Fifty four new DDs have been discovered, seven of them double lined (only 18 and 6 objects of these groups were known before, respectively). The final sample is expected to contain 150 to 200 DDs. Eight new pre-cataclysmic binaries were also detected. SPY is the first DD survey which encompasses also non-DA white dwarfs. SPY produces an immense, unique sample of very high resolution white dwarf spectra, which provides a lot of spin-off opportunities. We describe our projects to exploit the SPY sample for the determination of basic parameters, kinematics, and rotational velocities of white dwarfs. A catalogue with a first subset of our white dwarf data has already been published by Koester et al. 2001.

R. Napiwotzki; N. Christlieb; H. Drechsel; H. -J. Hagen; U. Heber; D. Homeier; C. Karl; D. Koester; B. Leibundgut; T. R. Marsh; S. Moehler; G. Nelemans; E. -M. Pauli; D. Reimers; A. Renzini; L. Yungelson

2002-03-09T23:59:59.000Z

54

NJ WY AK AL CA AR CO CT DE FL GA HI ID KS IL IN IA IA KY LA  

Gasoline and Diesel Fuel Update (EIA)

0.00-1.99 0.00-1.99 2.00-2.99 3.00-3.99 4.00-4.99 5.00-5.99 6.00-6.99 7.00+ NJ WY AK AL CA AR CO CT DE FL GA HI ID KS IL IN IA IA KY LA ME MI MA MD MN MS MT MO NE ND OH NV NM NY NH NC OK OR PA RI SC SD TN TX UT VT WA WV WI AZ VA DC 0.00-1.99 2.00-2.99 3.00-3.99 4.00-4.99 5.00-5.99 6.00-6.99 7.00+ 18. Average Price of Natural Gas Delivered to U.S. Onsystem Industrial Consumers, 1996 (Dollars per Thousand Cubic Feet) Figure 19. Average Price of Natural Gas Delivered to U.S. Electric Utilities, 1996 (Dollars per Thousand Cubic Feet) Figure Sources: Federal Energy Regulatory Commission (FERC), Form FERC-423, "Monthly Report of Cost and Quality of Fuels for Electric Plants," and Energy Information Administration (EIA), Form EIA-176, "Annual Report of Natural and Supplemental Gas Supply and Disposition." Note: In 1996, consumption of natural gas for agricultural use

55

Search for double degenerate progenitors of supernovae type Ia with SPY  

E-Print Network [OSTI]

We report on a large survey for double degenerate (DD) binaries as potential progenitors of type Ia supernovae with the UVES spectrograph at the ESO VLT (SN Ia Progenitor surveY - SPY). About 560 white dwarfs were checked for radial velocity variations until now. Ninety new DDs have been discovered, including short period systems with masses close to the Chandrasekhar mass.

R. Napiwotzki; N. Christlieb; H. Drechsel; H. -J. Hagen; U. Heber; D. Homeier; C. Karl; D. Koester; B. Leibundgut; T. R. Marsh; S. Moehler; G. Nelemans; E. -M. Pauli; D. Reimers; A. Renzini; L. Yungelson

2002-10-29T23:59:59.000Z

56

Analytical Expressions For Light-Curves Of Ordinary And Superluminous Supernovae Type Ia  

E-Print Network [OSTI]

Ordinary supernovae of type Ia (SNeIa) may be produced by the thermonuclear explosion of white dwarfs (WDs), which after their nascence in proto-planetary nebulae accrete fall-back matter and approach the Chandrasekhar mass limit. If the detonation continues into the fall-back layer and/or if the SNIa debris collide with it, they may produce a super Chandrasekhar SNIa. A few underlying physical assumptions of such model yield a very simple master formula that reproduces quite well the bolometric light-curves of both ordinary and supeluminous SNeIa. Other main properties of SNeIa, including the empirical 'brighter-slower' Philipps' relation that was used to standardize ordinary SNeIa as distance indicators and led to the discovery of the accelerating expansion of the universe are also reproduced.

Shlomo Dado; Arnon Dar

2014-02-06T23:59:59.000Z

57

Type Ia supernova rate studies from the SDSS-II Supernova Study  

SciTech Connect (OSTI)

The author presents new measurements of the type Ia SN rate from the SDSS-II Supernova Survey. The SDSS-II Supernova Survey was carried out during the Fall months (Sept.-Nov.) of 2005-2007 and discovered {approx} 500 spectroscopically confirmed SNe Ia with densely sampled (once every {approx} 4 days), multi-color light curves. Additionally, the SDSS-II Supernova Survey has discovered several hundred SNe Ia candidates with well-measured light curves, but without spectroscopic confirmation of type. This total, achieved in 9 months of observing, represents {approx} 15-20% of the total SNe Ia discovered worldwide since 1885. The author describes some technical details of the SN Survey observations and SN search algorithms that contributed to the extremely high-yield of discovered SNe and that are important as context for the SDSS-II Supernova Survey SN Ia rate measurements.

Dilday, Benjamin; /Chicago U.

2008-08-01T23:59:59.000Z

58

Type Ia supernovae selection and forecast of cosmology constraints for the Dark Energy Survey  

Science Journals Connector (OSTI)

We present the results of a study of selection criteria to identify Type Ia supernovae photometrically in a simulated mixed sample of Type Ia supernovae and core collapse supernovae. The simulated sample is a mockup of the expected results of the Dark Energy Survey. Fits to the \\{MLCS2k2\\} and SALT2 Type Ia supernova models are compared and used to help separate the Type Ia supernovae from the core collapse sample. The Dark Energy Task Force Figure of Merit (modified to include core collapse supernovae systematics) is used to discriminate among the various selection criteria. This study of varying selection cuts for Type Ia supernova candidates is the first to evaluate core collapse contamination using the Figure of Merit. Different factors that contribute to the Figure of Merit are detailed. With our analysis methods, both SALT2 and \\{MLCS2k2\\} Figures of Merit improve with tighter selection cuts and higher purities, peaking at 98% purity.

Eda Gjergo; Jefferson Duggan; John D. Cunningham; Steve Kuhlmann; Rahul Biswas; Eve Kovacs; Joseph P. Bernstein; Harold Spinka

2013-01-01T23:59:59.000Z

59

Microsoft PowerPoint - IEEE IAS PES 102313.pptx  

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

DOE's ARRA DOE's ARRA Smart Grid Program Steve Bossart, Senior Energy Analyst IEEE IAS/PES Pittsburgh Section October 23, 2013 ‹#› Topics * OE ARRA Smart Grid Program * OE ARRA Smart Grid Progress * Results and Case Studies * Life After ARRA Smart Grid ‹#› DOE OE ARRA Smart Grid Program ‹#› American Recovery and Reinvestment Act ($4.5B) * Smart Grid Investment Grants (99 projects) - $3.4 billion Federal; $4.7 billion private sector - > 800 PMUs covering almost 100% of transmission - ~ 8000 distribution automation circuits - > 15 million smart meters * Smart Grid Demonstration Projects (32 projects) - $685 million Federal; $1 billion private sector - 16 storage projects - 16 regional demonstrations Smart Grid ARRA Activities ‹#› Smart Grid investment from ARRA field projects

60

Type Ia Supernova: Burning and Detonation in the Distributed Regime  

E-Print Network [OSTI]

A simple, semi-analytic representation is developed for nuclear burning in Type Ia supernovae in the special case where turbulent eddies completely disrupt the flame. The speed and width of the ``distributed'' flame front are derived. For the conditions considered, the burning front can be considered as a turbulent flame brush composed of corrugated sheets of well-mixed flames. These flames are assumed to have a quasi-steady-state structure similar to the laminar flame structure, but controlled by turbulent diffusion. Detonations cannot appear in the system as long as distributed flames are still quasi-steady-state, but this condition is violated when the distributed flame width becomes comparable to the size of largest turbulent eddies. When this happens, a transition to detonation may occur. For current best estimates of the turbulent energy, the most likely density for the transition to detonation is in the range 0.5 - 1.5 x 10^7 g cm^{-3}.

S. E. Woosley

2007-09-26T23:59:59.000Z

Note: This page contains sample records for the topic "livermore ia ia" 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

Type Ia Supernova Hubble Residuals and Host-Galaxy Properties  

SciTech Connect (OSTI)

Kim et al. (2013) [K13] introduced a new methodology for determining peak- brightness absolute magnitudes of type Ia supernovae from multi-band light curves. We examine the relation between their parameterization of light curves and Hubble residuals, based on photometry synthesized from the Nearby Supernova Factory spec- trophotometric time series, with global host-galaxy properties. The K13 Hubble residual step with host mass is 0.013 ? 0.031 mag for a supernova subsample with data coverage corresponding to the K13 training; at ? 1?, the step is not significant and lower than previous measurements. Relaxing the data coverage requirement the Hubble residual step with host mass is 0.045 ? 0.026 mag for the larger sample; a calculation using the modes of the distributions, less sensitive to outliers, yields a step of 0.019 mag. The analysis of this article uses K13 inferred luminosities, as distinguished from previous works that use magnitude corrections as a function of SALT2 color and stretch param- eters: Steps at> 2? significance are found in SALT2 Hubble residuals in samples split by the values of their K13 x(1) and x(2) light-curve parameters. x(1) affects the light- curve width and color around peak (similar to the?m15 and stretch parameters), and x(2) affects colors, the near-UV light-curve width, and the light-curve decline 20 to 30 days after peak brightness. The novel light-curve analysis, increased parameter set, and magnitude corrections of K13 may be capturing features of SN Ia diversity arising from progenitor stellar evolution.

Nearby Supernova Factory; Kim, A. G.; Aldering, G.; Antilogus, P.; Aragon, C.; Bailey, S.; Baltay, C.; Bongard, S.; Buton, C.; Canto, A.; Cellier-Holzem, F.; Childress, M.; Chotard, N.; Copin, Y.; Fakhouri, H. K.; Feindt, U.; Fleury, M.; Gangler, E.; Greskovic, P.; Guy, J.; Kowalski, M.; Lombardo, S.; Nordin, J.; Nugent, P.; Pain, R.; Pecontal, E.; Pereira, R.; Perlmutter, S.; Rabinowitz, D.; Rigault, M.; Runge, K.; Saunders, C.; Scalzo, R.; Smadja, G.; Tao, C.; Thomas, R. C.; Weaver, B. A.

2014-01-17T23:59:59.000Z

62

A mutant of Escherichia coli defective in penicillin-binding protein 5 and lacking D-alanine carboxypeptidase IA.  

Science Journals Connector (OSTI)

...preparation of D-alanrne car- boxypeptidase IA of...IA, because a mutant defective in D-alanine carbox...both activities were defective or both were normal...residual D-alanine car- boxypeptidase IA activity...and to obtain a mutant defective in PBP-6 are in progress...

Y Nishimura; H Suzuki; Y Hirota; J T Park

1980-07-01T23:59:59.000Z

63

Stellar Populations and the White Dwarf Mass Function: Connections To Supernova Ia Luminosities  

E-Print Network [OSTI]

We discuss the luminosity function of SNe Ia under the assumption that recent evidence for dispersion in this standard candle is related to variations in the white dwarf mass function (WDMF) in the host galaxies. We develop a simple parameterization of the WDMF as a function of age of a stellar population and apply this to galaxies of different morphological types. We show that this simplified model is consistent with the observed WDMF of Bergeron et al. (1992) for the solar neighborhood. Our simple models predict that WDMF variations can produce a range of more than 1.8 mag in M$_B$(SN Ia), which is comparable to the observed value using the data of Phillips (1993) and van den Bergh (1996). We also predict a galaxy type dependence of M$_B$(SN Ia) under standard assumptions of the star formation history in these galaxies and show that M$_B$(SN Ia) can evolve with redshift. In principle both evolutionary and galaxy type corrections should be applied to recover the intrinsic range of M$_B$(SN Ia) from the observed values. Our current inadequate knowledge of the star formation history of galaxies coupled with poor physical understanding of the SN Ia mechanism makes the reliable estimation of these corrections both difficult and controversial. The predictions of our models combined with the observed galaxy and redshift correlations may have the power to discriminate between the Chandrasekhar and the sub-Chandrasekhar progenitor scenarios for SNe Ia.

Ted von Hippel; G. D. Bothun; R. A. Schommer

1997-06-11T23:59:59.000Z

64

Tension and Systematics in the Gold06 SnIa Dataset  

E-Print Network [OSTI]

The Gold06 SnIa dataset recently released in astro-ph/0611572 consists of five distinct subsets defined by the group or instrument that discovered and analyzed the corresponding data. These subsets are: the SNLS subset (47 SnIa), the HST subset (30 SnIa), the HZSST subset (41 SnIa), the SCP subset (26 SnIa) and the Low Redshift (LR) subset (38 SnIa). These subsets sum up to the 182 SnIa of the Gold06 dataset. We use Monte-Carlo simulations to study the statistical consistency of each one of the above subsets with the full Gold06 dataset. In particular, we compare the best fit $w(z)$ parameters (w_0,w_1) obtained by subtracting each one of the above subsets from the Gold06 dataset (subset truncation), with the corresponding best fit parameters (w^r_0,w^r_1) obtained by subtracting the same number of randomly selected SnIa from the same redshift range of the Gold06 dataset (random truncation). We find that the probability for (w^r_0,w^r_1)=(w_0,w_1) is large for the Gold06 minus SCP (Gold06-SCP) truncation but is less than 5% for the Gold06-SNLS, Gold06-HZSST and Gold06-HST truncations. This result implies that the Gold06 dataset is not statistically homogeneous. By comparing the values of the best fit (w_0,w_1) for each subset truncation we find that the tension among subsets is such that the SNLS and HST subsets are statistically consistent with each other and `pull' towards LCDM (w_0=-1,w_1=0) while the HZSST subset is statistically distinct and strongly `pulls' towards a varying w(z) crossing the line $w=-1$ from below (w_00). We also isolate six SnIa that are mostly responsible for this behavior of the HZSST subset.

S. Nesseris; L. Perivolaropoulos

2007-01-09T23:59:59.000Z

65

Solar abundance of manganese: a case for the existence of near Chandrasekhar-mass Type Ia supernova progenitors  

E-Print Network [OSTI]

Context: Manganese is predominantly synthesised in Type Ia supernova (SN Ia) explosions. Owing to the entropy dependence of the Mn yield in explosive thermonuclear burning, SNe Ia involving near Chandrasekhar-mass white dwarfs (WDs) are predicted to produce Mn to Fe ratios significantly exceeding those of SN Ia explosions involving sub-Chandrasekhar mass primary WDs. Of all current supernova explosion models, only SN Ia models involving near-Chandrasekhar mass WDs produce [Mn/Fe] > 0.0. Aims: Using the specific yields for competing SN Ia scenarios, we aim to constrain the relative fractions of exploding near-Chandrasekhar mass to sub-Chandrasekhar mass primary WDs in the Galaxy. Methods: We extract the Mn yields from three-dimensional thermonuclear supernova simulations referring to different initial setups and progenitor channels. We then compute the chemical evolution of Mn in the Solar neighborhood, assuming SNe Ia are made up of different relative fractions of the considered explosion models. Results: We ...

Seitenzahl, Ivo R; Roepke, Friedrich K; Ruiter, Ashley J

2013-01-01T23:59:59.000Z

66

INDECOMPOSABLE RACKS OF ORDER p2 MAT'IAS GRA"NA  

E-Print Network [OSTI]

INDECOMPOSABLE RACKS OF ORDER p2 MAT'IAS GRA"NA Abstract.We classify indecomposable racks of order p2(p a prime). There a of prime order is trivial. 1.Introduction Racks and quandles have

Graña, Matías

67

Structural studies of allosteric regulation in the class Ia Ribonucleotide reductase from Escherichia coli  

E-Print Network [OSTI]

Ribonucleotide reductase (RNR) converts ribonucleotides to deoxyribonucleotides, the building blocks for DNA replication and repair. The E. coli class Ia enzyme requires two subunits to catalyze the radical-based reduction ...

Zimanyi, Christina Marie

2013-01-01T23:59:59.000Z

68

Type Ia supernova rate at a redshift of ~;0.1  

SciTech Connect (OSTI)

We present the type Ia rate measurement based on two EROS supernova search campaigns (in 1999 and 2000). Sixteen supernovae identified as type Ia were discovered. The measurement of the detection efficiency, using a Monte Carlo simulation, provides the type Ia supernova explosion rate at a redshift {approx} 0.13. The result is 0.125{sub -0.034-0.028}{sup +0.044+0.028} h{sub 70}{sup 2} SNu where 1 SNu = 1 SN/10{sup 10} L{sub {circle_dot}}{sup B}/century. This value is compatible with the previous EROS measurement (Hardin et al. 2000), done with a much smaller sample, at a similar redshift. Comparison with other values at different redshifts suggests an evolution of the type Ia supernova rate.

Blanc, G.; Afonso, C.; Alard, C.; Albert, J.N.; Aldering, G.; Amadon, A.; Andersen, J.; Ansari, R.; Aubourg, E.; Balland, C.; Bareyre,P.; Beaulieu, J.P.; Charlot, X.; Conley, A.; Coutures, C.; Dahlen, T.; Derue, F.; Fan, X.; Ferlet, R.; Folatelli, G.; Fouque, P.; Garavini, G.; Glicenstein, J.F.; Goldman, B.; Goobar, A.; Gould, A.; Graff, D.; Gros,M.; Haissinski, J.; Hamadache, C.; Hardin, D.; Hook, I.M.; deKat, J.; Kent, S.; Kim, A.; Lasserre, T.; LeGuillou, L.; Lesquoy, E.; Loup, C.; Magneville, C.; Marquette, J.B.; Maurice, E.; Maury, A.; Milsztajn, A.; Moniez, M.; Mouchet, M.; Newberg, H.; Nobili, S.; Palanque-Delabrouille,N.; Perdereau, O.; Prevot, L.; Rahal, Y.R.; Regnault, N.; Rich, J.; Ruiz-Lapuente, P.; Spiro, M.; Tisserand, P.; Vidal-Madjar, A.; Vigroux,L.; Walton, N.A.; Zylberajch, S.

2004-05-11T23:59:59.000Z

69

~ VII -ATTiVIT EDILIZIE .. Servizio di Ateneo per lEnergIa  

E-Print Network [OSTI]

~ VII - ATTiVIT? EDILIZIE n'p. .' .. Servizio di Ateneo per lEnergIa - N AlJZ43 ········ - .·:tri

Di Pillo, Gianni

70

Infrastructure Assessment Mission: USACE Infrastructure Assessment (IA) Planning and Response Teams (PRTs) have two main  

E-Print Network [OSTI]

, and structural engineering applications; urban search & rescue (US&R) support; and water/wastewater) include pre- and post-declaration support for deploying an IA management cell, water/wastewater assessment

US Army Corps of Engineers

71

Gamma-rays from Type Ia supernova SN2014J  

E-Print Network [OSTI]

The whole set of INTEGRAL observations of type Ia supernova SN2014J, covering the period 16-162 days after the explosion has being analyzed. For spectral fitting the data are split into early and late periods covering days 16-35 and 50-162, respectively, optimized for Ni-56 and Co-56 lines. As expected for the early period much of the gamma-ray signal is confined to energies below $\\sim$200 keV, while for the late period it is most strong above 400 keV. In particular, in the late period Co-56 lines at 847 and 1248 keV are detected at 4.7 and 4.3 sigma respectively. The lightcurves in several representative energy bands are calculated for the entire period. The resulting spectra and lightcurves are compared with a subset of models. We confirm our previous finding that the gamma-ray data are broadly consistent with the expectations for canonical 1D models, such as delayed detonation or deflagration models for a near-Chandrasekhar mass WD. Late optical spectra (day 136 after the explosion) show rather symmetric ...

Churazov, E; Isern, J; Bikmaev, I; Bravo, E; Chugai, N; Grebenev, S; Jean, P; Kndlseder, J; Lebrun, F; Kuulkers, E

2015-01-01T23:59:59.000Z

72

2010-2011 Depto. Ciencia de la Computacin e IA Especialista Universitario Java Enterprise  

E-Print Network [OSTI]

© 2010-2011 Depto. Ciencia de la Computación e IA Especialista Universitario Java Enterprise Struts Sesión 4: Introducción a Struts 2 #12;© 2010-2011 Depto. Ciencia de la Computación e IA Especialista · Taglibs · Internacionalización · Validación · Conceptos nuevos en Struts 2 #12;© 2010-2011 Depto. Ciencia

Escolano, Francisco

73

Experto Universitario Java Enterprise 2012-2013 Depto. Ciencia de la Computacin e IA  

E-Print Network [OSTI]

Experto Universitario Java Enterprise © 2012-2013 Depto. Ciencia de la Computación e IA Lenguaje Java Avanzado Sesión 3: Tratamiento de errores #12;Lenguaje Java Avanzado © 2012-2013 Depto. Ciencia de · Tipos genéricos #12;Lenguaje Java Avanzado © 2012-2013 Depto. Ciencia de la Computación e IA Errores - 3

Escolano, Francisco

74

Constraining the double-degenerate scenario for Type Ia supernovae from merger ejected matter  

E-Print Network [OSTI]

We follow the mass blown during the WD-WD merger process in the Double-Degenerate (DD) scenario for type Ia supernovae (SN Ia), and find that the interaction of the SN ejecta with this wind affects the early (thermal energy and then to additional radiation. The radiation could be interpreted as an explosion originating from a progenitor having a radius of one solar radius or more, contradicting observations of SN 2011fe.

Levanon, Naveh; Garca-Berro, Enrique

2014-01-01T23:59:59.000Z

75

THE DISCOVERY OF THE MOST DISTANT KNOWN TYPE Ia SUPERNOVA AT REDSHIFT 1.914  

SciTech Connect (OSTI)

We present the discovery of a Type Ia supernova (SN) at redshift z = 1.914 from the CANDELS multi-cycle treasury program on the Hubble Space Telescope (HST). This SN was discovered in the infrared using the Wide-Field Camera 3, and it is the highest-redshift Type Ia SN yet observed. We classify this object as a SN Ia by comparing its light curve and spectrum with those of a large sample of Type Ia and core-collapse SNe. Its apparent magnitude is consistent with that expected from the {Lambda}CDM concordance cosmology. We discuss the use of spectral evidence for classification of z > 1.5 SNe Ia using HST grism simulations, finding that spectral data alone can frequently rule out SNe II, but distinguishing between SNe Ia and SNe Ib/c can require prohibitively long exposures. In such cases, a quantitative analysis of the light curve may be necessary for classification. Our photometric and spectroscopic classification methods can aid the determination of SN rates and cosmological parameters from the full high-redshift CANDELS SN sample.

Jones, David O.; Rodney, Steven A.; Riess, Adam G. [Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218 (United States); Mobasher, Bahram [Department of Physics and Astronomy, University of California, Riverside, CA 92521 (United States); Dahlen, Tomas; Casertano, Stefano; Koekemoer, Anton [Space Telescope Science Institute, Baltimore, MD 21218 (United States); McCully, Curtis; Keeton, Charles R.; Patel, Brandon [Department of Physics and Astronomy, Rutgers, State University of New Jersey, Piscataway, NJ 08854 (United States); Frederiksen, Teddy F.; Hjorth, Jens [Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen (Denmark); Strolger, Louis-Gregory [Department of Physics, Western Kentucky University, Bowling Green, KY 42101 (United States); Wiklind, Tommy G. [Joint ALMA Observatory, ESO, Santiago (Chile); Challis, Peter [Harvard/Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States); Graur, Or [School of Physics and Astronomy, Tel-Aviv University, Tel-Aviv 69978 (Israel); Hayden, Brian; Garnavich, Peter [Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States); Weiner, Benjamin J. [Department of Astronomy, University of Arizona, Tucson, AZ 85721 (United States); Filippenko, Alexei V. [Department of Astronomy, University of California, Berkeley, CA 94720-3411 (United States); and others

2013-05-10T23:59:59.000Z

76

CIMAT, VIII Escuela de verano, 30 de julio -12 de agos* Introducci'on a la Geometr'ia de la Mec'anic*  

E-Print Network [OSTI]

* *fluencia de una fuerza F(x) se define su energ'ia (como funci'on de su posici'on y velocidad) por E = T +* * V donde la energ'ia cin'etica T = m(x`)2=2 y la energ'ia potencial V (x) es una funci'on que(x) entonces su energ* *'ia E se mantiene constante en el tiempo (la Ley de Conservaci'on de Energ'ia

Bor, Gil

77

Verifying the Cosmological Utility of Type Ia Supernovae: Implications of a Dispersion in the Ultraviolet Spectra  

SciTech Connect (OSTI)

We analyze the mean rest-frame ultraviolet (UV) spectrum of Type Ia Supernovae (SNe) and its dispersion using high signal-to-noise ratio Keck-I/LRIS-B spectroscopy for a sample of 36 events at intermediate redshift (z=0.5) discovered by the Canada-France-Hawaii Telescope Supernova Legacy Survey (SNLS). We introduce a new method for removing host galaxy contamination in our spectra, exploiting the comprehensive photometric coverage of the SNLS SNe and their host galaxies, thereby providing the first quantitative view of the UV spectral properties of a large sample of distant SNe Ia. Although the mean SN Ia spectrum has not evolved significantly over the past 40percent of cosmic history, precise evolutionary constraints are limited by the absence of a comparable sample of high-quality local spectra. The mean UV spectrum of our z~;;=0.5 SNe Ia and its dispersion is tabulated for use in future applications. Within the high-redshift sample, we discover significant UV spectral variations and exclude dust extinction as the primary cause by examining trends with the optical SN color. Although progenitor metallicity may drive some of these trends, the variations we see are much larger than predicted in recent models and do not follow expected patterns. An interesting new result is a variation seen in the wavelength of selected UV features with phase. We also demonstrate systematic differences in the SN Ia spectral features with SN light curve width in both the UV and the optical. We show that these intrinsic variations could represent a statistical limitation in the future use of high-redshift SNe Ia for precision cosmology. We conclude that further detailed studies are needed, both locally and at moderate redshift where the rest-frame UV can be studied precisely, in order that future missions can confidently be planned to fully exploit SNe Ia as cosmological probes.

Nugent, Peter E; Ellis, R.S.; Sullivan, M.; Nugent, P.E.; Howell, D.A.; Gal-Yam, A.; Astier, P.; Balam, D.; Balland, C.; Basa, S.; Carlberg, R.; Conley, A.; Fouchez, D.; Guy, J.; Hardin, D.; Hook, I.; Pain, R.; Perrett, K.; Pritchet, C.J.; Regnault, N.

2008-02-28T23:59:59.000Z

78

Utilizing Type Ia Supernovae in a Large, Fast, Imaging Survey to Constrain Dark Energy  

E-Print Network [OSTI]

We study the utility of a large sample of type Ia supernovae that might be observed in an imaging survey that rapidly scans a large fraction of the sky for constraining dark energy. We consider information from the traditional luminosity distance test as well as the spread in SNeIa fluxes at fixed redshift induced by gravitational lensing. We include a treatment of photometric redshift uncertainties in our analysis. Our primary result is that the information contained in the mean distance moduli of SNeIa and the dispersion among SNeIa distance moduli complement each other, breaking a degeneracy between the present dark energy equation of state and its time variation without the need for a high-redshift supernova sample. To address photometric redshift uncertainties, we present dark energy constraints as a function of the size of an external set of spectroscopically-observed SNeIa that may be used for redshift calibration, nspec. We find that an imaging survey can constrain the dark energy equation of state at the epoch where it is best constrained with a 1-sigma error of sigma(wpiv)~0.03-0.09$, depending upon various assumptions. In addition, the marginal improvement in the error sigma(wpiv) from an increase in the spectroscopic calibration sample drops once nspec ~ 10^3. This result is important because it is of the order of the size of calibration samples likely to be compiled in the coming decade and because, for samples of this size, the spectroscopic and imaging surveys individually place comparable constraints on the dark energy equation of state. In all cases, it is best to calibrate photometric redshifts with a set of spectroscopically-observed SNeIa with relatively more objects at high redshift than the parent sample of imaging SNeIa.

Andrew R. Zentner; Suman Bhattacharya

2008-12-01T23:59:59.000Z

79

Discovering the Nature of Dark Energy: Towards Better Distances from Type Ia Supernovae -- Final Technical Report  

SciTech Connect (OSTI)

Type Ia supernovae (SNe Ia; exploding white-dwarf stars) were the key to the Nobel-worthy 1998 discovery and subsequent verification that the expansion of the Universe is accelerating, driven by the effects of dark energy. Understanding the nature of this mysterious, yet dominant, component of the Universe is at the forefront of research in cosmology and fundamental physics. SNe Ia will continue to play a leading role in this enterprise, providing precise cosmological distances that improve constraints on the nature of dark energy. However, for this effort to succeed, we need to more thoroughly understand relatively nearby SNe Ia, because our conclusions come only from comparisons between them and distant (high-redshift) SNe Ia. Thus, detailed studies of relatively nearby SNe Ia are the focus of this research program. Many interesting results were obtained during the course of this project; these were published in 32 refereed research papers that acknowledged the grant. A major accomplishment was the publication of supernova (SN) rates derived from about a decade of operation of the Lick Observatory Supernova Search (LOSS) with the 0.76-meter Katzman Automatic Imaging Telescope (KAIT). We have determined the most accurate rates for SNe of different types in large, nearby galaxies in the present-day Universe, and these can be compared with SN rates far away (and hence long ago in the past) to set constraints on the types of stars that explode. Another major accomplishment was the publication of the light curves (brightness vs. time) of 165 SNe Ia, along with optical spectroscopy of many of these SNe as well as other SNe Ia, providing an extensive, homogeneous database for detailed studies. We have conducted intensive investigations of a number of individual SNe Ia, including quite unusual examples that allow us to probe the entire range of SN explosions and provide unique insights into these objects and the stars before they explode. My team's studies have also led to the identification of subsamples of SNe Ia that can be used to provide the most reliable cosmological distances, and we developed ways to deal with the dust that makes SNe Ia appear fainter than they really are. Using the KAIT/LOSS sample, we produced an excellent Hubble diagram (galaxy recession speed vs. distance), accurately showing the expansion of the Universe. Even smaller scatter was achieved when spectroscopic characteristics were taken into account. Another high-quality Hubble diagram was constructed with SNe Ia from the Sloan Digital Sky Survey (SDSS). These Hubble diagrams provide useful new constraints on the nature of the dark energy that is accelerating the expansion of the Universe. As an added bonus of our research, we also studied core-collapse SNe, which differ fundamentally from SNe Ia.

Filippenko, Alexei Vladimir [Univ. California, Berkeley

2014-05-09T23:59:59.000Z

80

CfA4: LIGHT CURVES FOR 94 TYPE Ia SUPERNOVAE  

SciTech Connect (OSTI)

We present multi-band optical photometry of 94 spectroscopically confirmed Type Ia supernovae (SNe Ia) in the redshift range 0.0055-0.073, obtained between 2006 and 2011. There are a total of 5522 light-curve points. We show that our natural-system SN photometry has a precision of {approx}< 0.03 mag in BVr'i', {approx}< 0.06 mag in u', and {approx}< 0.07 mag in U for points brighter than 17.5 mag and estimate that it has a systematic uncertainty of 0.014, 0.010, 0.012, 0.014, 0.046, and 0.073 mag in BVr'i'u'U, respectively. Comparisons of our standard-system photometry with published SN Ia light curves and comparison stars reveal mean agreement across samples in the range of {approx}0.00-0.03 mag. We discuss the recent measurements of our telescope-plus-detector throughput by direct monochromatic illumination by Cramer et al. This technique measures the whole optical path through the telescope, auxiliary optics, filters, and detector under the same conditions used to make SN measurements. Extremely well characterized natural-system passbands (both in wavelength and over time) are crucial for the next generation of SN Ia photometry to reach the 0.01 mag accuracy level. The current sample of low-z SNe Ia is now sufficiently large to remove most of the statistical sampling error from the dark-energy error budget. But pursuing the dark-energy systematic errors by determining highly accurate detector passbands, combining optical and near-infrared (NIR) photometry and spectra, using the nearby sample to illuminate the population properties of SNe Ia, and measuring the local departures from the Hubble flow will benefit from larger, carefully measured nearby samples.

Hicken, Malcolm; Challis, Peter; Kirshner, Robert P.; Bakos, Gaspar; Berlind, Perry; Brown, Warren R.; Caldwell, Nelson; Calkins, Mike; Falco, Emilio; Fernandez, Jose; Friedman, Andrew S.; Groner, Ted; Hartman, Joel [Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States); Rest, Armin [Space Telescope Science Institute, Baltimore, MD 21218 (United States); Cramer, Claire E. [NIST (National Institute of Standards and Technology), Gaithersburg, MD 20899 (United States); Wood-Vasey, W. Michael [Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260 (United States); Currie, Thayne [NASA, Goddard Space Flight Center, Greenbelt, MD 20771 (United States); De Kleer, Kathy [Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139 (United States); Esquerdo, Gil; Everett, Mark, E-mail: mhicken@cfa.harvard.edu [Planetary Science Institute, 1700 East Fort Lowell Road, Tucson, AZ 85719 (United States); and others

2012-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "livermore ia ia" 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

IAS15: a fast, adaptive, high-order integrator for gravitational dynamics, accurate to machine precision over a billion orbits  

Science Journals Connector (OSTI)

......error behaves like a random walk. Our tests show that ias15 is superior to a mixed-variable...that ias15 follows Brouwer's law. We test our integrator in a wide variety of cases...focus on the two-body problem, a simple test case where we know the correct answer......

Hanno Rein; David S. Spiegel

2015-01-01T23:59:59.000Z

82

FROM RACKS TO POINTED HOPF ALGEBRAS AS ANDRUSKIEWITSCH AND MAT IAS GRA ~  

E-Print Network [OSTI]

FROM RACKS TO POINTED HOPF ALGEBRAS NICOL #19; AS ANDRUSKIEWITSCH AND MAT #19; IAS GRA ~ NA (C X; c q ), where X is a rack and q is a 2-cocycle on X with values in C #2; . Racks and cohomology of racks appeared also in the work of topologists. This leads us to the study of the structure of racks

Graña, Matías

83

Flames in Type Ia Supernova: Deflagration-Detonation Transition in the Oxygen Burning Flame  

E-Print Network [OSTI]

Flames in Type Ia Supernova: Deflagration-Detonation Transition in the Oxygen Burning Flame S. E of these regions can be supersonic and could initiate a detonation. Subject headings: supernovae: general a late time transition of the thermonuclear burning to a detonation wave (e.g., Hoflich et al. 1995

84

Section I. Summary of Project Activities Section I-A. 2008-2009 Project Summary  

E-Print Network [OSTI]

Section I. Summary of Project Activities Section I-A. 2008-2009 Project Summary University year, we accomplished the following: · Established a dual career opportunity procedure vetted to address, communicate procedures for the new daycare facility, and to explore the potential

Farritor, Shane

85

SEASONAL V A R IA TIONS IN STRUCTURE AND CIRCULATION IN THE RED SEA  

E-Print Network [OSTI]

SEASONAL V A R IA TIONS IN STRUCTURE AND CIRCULATION IN THE RED SEA A DISSERTATION SUBMITTE D and surface circulation in the Red Sea, occur r ing along the north-south axis of the Sea and extending fr om on in the northern Red Sea is frorn the nor th-northwest throughout the year' during the winter ( fr om October

Luther, Douglas S.

86

Seminar Ia, cetrti letnik, stari program LONGITUDINAL DYNAMICS OF PARTICLES IN ACCELERATORS  

E-Print Network [OSTI]

Seminar Ia, cetrti letnik, stari program LONGITUDINAL DYNAMICS OF PARTICLES IN ACCELERATORS Author motion of charged particles in particle accelerators. The technique of acceleration by electromagnetic waves is explored and the stability of motion under such acceleration is inspected. The seminar

?umer, Slobodan

87

Final Technical Report: Discovering the Nature of Dark Energy: Towards Better Distances from Type Ia Supernovae  

SciTech Connect (OSTI)

The final technical report from the project "Discovering the Nature of Dark Energy: Towards Better Distances from Type Ia Supernovae" led at Rutgers the State University of New Jersey by Prof. Saurabh W. Jha is presented, including all publications resulting from this award.

Saurabh W. Jha

2012-10-03T23:59:59.000Z

88

SponSored by http://www.ntu.edu.sg/ias/oCpA8  

E-Print Network [OSTI]

SponSored by http://www.ntu.edu.sg/ias/oCpA8 International Conference on physics education · Statistical and Nonlinear physics · Science Education · Women in Physics Sir Michael PEPPER Univ. College or poster presentations. All posters at the conference will be considered for the 2014 OCPA-APS Outstanding

Faraon, Andrei

89

THE CARNEGIE SUPERNOVA PROJECT: SECOND PHOTOMETRY DATA RELEASE OF LOW-REDSHIFT TYPE Ia SUPERNOVAE  

SciTech Connect (OSTI)

The Carnegie Supernova Project (CSP) was a five-year observational survey conducted at Las Campanas Observatory that obtained, among other things, high-quality light curves of {approx}100 low-redshift Type Ia supernovae (SNe Ia). Presented here is the second data release of nearby SN Ia photometry consisting of 50 objects, with a subset of 45 having near-infrared follow-up observations. Thirty-three objects have optical pre-maximum coverage with a subset of 15 beginning at least five days before maximum light. In the near-infrared, 27 objects have coverage beginning before the epoch of B-band maximum, with a subset of 13 beginning at least five days before maximum. In addition, we present results of a photometric calibration program to measure the CSP optical (uBgVri) bandpasses with an accuracy of {approx}1%. Finally, we report the discovery of a second SN Ia, SN 2006ot, similar in its characteristics to the peculiar SN 2006bt.

Stritzinger, Maximilian D. [The Oskar Klein Centre, Department of Astronomy, Stockholm University, AlbaNova, 10691 Stockholm (Sweden); Phillips, M. M.; Campillay, Abdo; Morrell, Nidia; Krzeminski, Wojtek; Roth, Miguel [Carnegie Observatories, Las Campanas Observatory, La Serena (Chile); Boldt, Luis N. [Argelander Institut fuer Astronomie, Universitaet Bonn, D-53111 Bonn (Germany); Burns, Chris; Freedman, Wendy L.; Madore, Barry F.; Persson, Sven E. [Observatories of the Carnegie Institution for Science, Pasadena, CA 91101 (United States); Contreras, Carlos [Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Victoria 3122 (Australia); Gonzalez, Sergio [Atacama Large Millimeter/Submillimeter Array, European Southern Observatory (Chile); Folatelli, Gaston [Institute for the Physics and Mathematics of the Universe (IPMU), University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583 (Japan); Salgado, Francisco [Leiden Observatory, Leiden University, NL-2300 RA Leiden (Netherlands); DePoy, D. L.; Marshall, J. L.; Rheault, Jean-Philippe; Suntzeff, Nicholas B. [George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, Department of Physics and Astronomy, Texas A and M University, College Station, TX 77843 (United States); Hamuy, Mario, E-mail: max.stritzinger@astro.su.se, E-mail: max@dark-cosmology.dk, E-mail: mstritzinger@lco.cl [Departamento de Astronomia, Universidad de Chile, Santiago (Chile)

2011-11-15T23:59:59.000Z

90

Abstract IA08: PTEN and PI3K signaling in brain development and disease  

Science Journals Connector (OSTI)

...Abstract IA08: PTEN and PI3K signaling in brain development and disease Suzanne J. Baker...an increased genetic susceptibility to brain tumors. However, inherited mutation of...and tumor suppression in the mammalian brain. Recently, germline or somatic mutations...

Suzanne J. Baker

2014-12-01T23:59:59.000Z

91

Turbulent Oxygen Flames in Type Ia Supernovae A. J. Aspden1  

E-Print Network [OSTI]

Turbulent Oxygen Flames in Type Ia Supernovae A. J. Aspden1 , J. B. Bell1 , and S. E. Woosley2 oxygen flames. The two aims of the paper are to examine the response of the inductive oxygen flame to intense levels of turbulence, and to explore the possibility of transition to detonation in the oxygen

92

The superconducting spin valve and triplet superconductivity I.A. Garifullin a,n  

E-Print Network [OSTI]

The superconducting spin valve and triplet superconductivity I.A. Garifullin a,n , P.V. Leksin s t r a c t A review of our recent results on the spin valve effect is presented. We have used coefficient DF and the exchange splitting I of the conduction band in the F layer [1]. For pure Fe the value

Fominov, Yakov

93

CIMAT, VIII Escuela de verano, 30 de julio -12 de ago* Introducci'on a la Geometr'ia de la Mec'ani*  

E-Print Network [OSTI]

con un valor fijo de la energ* *'ia corresponden a secciones del cono del inciso (a) por * *energ'ia tienen el mismo semi-eje mayor. 11.Demuestra la tercera ley de Kepler: toda soluci'on peri Introducci'on a la Geometr'ia de la Mec'ani* *ca Cl'asica Problemas 7 - 12

Bor, Gil

94

File:USDA-CE-Production-GIFmaps-IA.pdf | Open Energy Information  

Open Energy Info (EERE)

IA.pdf IA.pdf Jump to: navigation, search File File history File usage Iowa Ethanol Plant Locations Size of this preview: 776 × 600 pixels. Full resolution ‎(1,650 × 1,275 pixels, file size: 303 KB, MIME type: application/pdf) Description Iowa Ethanol Plant Locations Sources United States Department of Agriculture Related Technologies Biomass, Biofuels, Ethanol Creation Date 2010-01-19 Extent State Countries United States UN Region Northern America States Iowa External links http://www.nass.usda.gov/Charts_and_Maps/Ethanol_Plants/ File history Click on a date/time to view the file as it appeared at that time. Date/Time Thumbnail Dimensions User Comment current 16:13, 27 December 2010 Thumbnail for version as of 16:13, 27 December 2010 1,650 × 1,275 (303 KB) MapBot (Talk | contribs) Automated bot upload

95

Mechanistic studies of proton-coupled electron transfer in aminotyrosine- and fluorotyrosine- substituted class Ia Ribonucleotide reductase  

E-Print Network [OSTI]

Ribonucleotide reductase (RNR) catalyzes the conversion of nucleotides to 2'- deoxynucleotides in all organisms. The class Ia RNR from Escherichia coli is active as an a2p2 complex and utilizes an unprecedented mechanism ...

Minnihan, Ellen Catherine

2012-01-01T23:59:59.000Z

96

Generation of a stable, aminotyrosyl radical-induced ?2?2 complex of Escherichia coli class Ia ribonucleotide reductase  

E-Print Network [OSTI]

Ribonucleotide reductase (RNR) catalyzes the conversion of nucleoside diphosphates to deoxynucleoside diphosphates (dNDPs). The Escherichia coli class Ia RNR uses a mechanism of radical propagation by which a cysteine in ...

Minnihan, Ellen Catherine

97

IA --"-IScience Service Featuse 'I WHY T i E IJEAYIiER ?  

E-Print Network [OSTI]

No. 591 April 3 IA --"-IScience Service Featuse 'I WHY T i E IJEAYIiER ? II city located oa the Ice.pp';g a% Bidialo, The ice c h i l l s a t h i n laye:. of a i r aver the Sake aridto laewwd. NOW$ vhen r may be srrfficionl t o produce a sheet cloud and g i ~ eBuffalo a day not oalg dwnt arid chilly Lu

98

Especialista Universitario Java Enterprise 2010-2011 Depto. Ciencia de la Computacin e IA  

E-Print Network [OSTI]

Especialista Universitario Java Enterprise © 2010-2011 Depto. Ciencia de la Computación e IA Sesión 1: Introducción a JMS #12;Servicios de Mensajes con JMS © 2010-2011 Depto. Ciencia de la Computación · Una Aplicación JMS · PTP · Pub/Sub #12;Servicios de Mensajes con JMS © 2010-2011 Depto. Ciencia de la

Escolano, Francisco

99

On the Thermonuclear Runaway in Type Ia Supernovae: How to Run Away?  

Science Journals Connector (OSTI)

Type Ia supernovae (SNe Ia) are thought to be thermonuclear explosions of massive white dwarfs (WDs). We present the first study of multidimensional effects during the final hours prior to the thermonuclear runaway that leads to the explosion. The calculations utilize an implicit, two-dimensional hydrodynamic code. Mixing and the ignition process are studied in detail. We find that the initial chemical structure of the WD is changed, but the material is not fully homogenized. In particular, the exploding WD sustains a central region with a low C/O ratio. This implies that the explosive nuclear burning will begin in a partially carbon-depleted environment. The thermonuclear runaway happens in a well-defined region close to the center. It is induced by compressional heat when matter is brought inward by convective flows. We find no evidence for multiple spot or strong off-center ignition. Convective velocities in the WD are on the order of 100 km s-1, which is well above the effective burning speeds in SNe Ia previously expected right after the runaway. In our calculations, the ignition occurs near the center. Then, for ? 0.5-1 s, the speed of the burning front will neither be determined by the laminar speed nor the Rayleigh-Taylor instabilities but by convective flows produced prior to the runaway. The consequences are discussed for our understanding of the detailed physics of the flame propagation, the deflagration to detonation transition, and the nucleosynthesis in the central layers. Our results strongly suggest the preconditioning of the progenitor as a key factor for our understanding of the diversity in SNe Ia.

P. Hflich; J. Stein

2002-01-01T23:59:59.000Z

100

Testing the DistanceDuality Relation with Galaxy Clusters and Type Ia Supernovae  

Science Journals Connector (OSTI)

In this Letter, we propose a new and model-independent cosmological test for the distance-duality (DD) relation, ? = DL (z)(1 + z)2/DA (z) = 1, where DL and DA are, respectively, the luminosity and angular diameter distances. For DL we consider two sub-samples of Type Ia supernovae (SNe Ia) taken from Constitution data whereas DA distances are provided by two samples of galaxy clusters compiled by De Filippis etal. and Bonamente etal. by combining Sunyaev-Zeldovich effect and X-ray surface brightness. The SNe Ia redshifts of each sub-sample were carefully chosen to coincide with the ones of the associated galaxy cluster sample (?z DA (z) ? DL (z), we have tested the DD relation by assuming that ? is a function of the redshift parameterized by two different expressions: ?(z) = 1 + ?0 z and ?(z) = 1 + ?0 z/(1 + z), where ?0 is a constant parameter quantifying a possible departure from the strict validity of the reciprocity relation (?0 = 0). In the best scenario (linear parameterization), we obtain ?0 = 0.28+0.44 0.44 (2?, statistical + systematic errors) for the De Filippis etal. sample (elliptical geometry), a result only marginally compatible with the DD relation. However, for the Bonamente etal. sample (spherical geometry) the constraint is ?0 = 0.42+0.34 0.34 (3?, statistical + systematic errors), which is clearly incompatible with the duality-distance relation.

R. F. L. Holanda; J. A. S. Lima; M. B. Ribeiro

2010-01-01T23:59:59.000Z

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101

Evaluation of copper for divider subassembly in MCO Mark IA and Mark IV scrap fuel baskets  

SciTech Connect (OSTI)

The K Basin Spent Nuclear Fuel (SNF) Project Multi-Canister Overpack (MCO) subprojection eludes the design and fabrication of a canister that will be used to confine, contain, and maintain fuel in a critically safe array to enable its removal from the K Basins, vacuum drying, transport, staging, hot conditioning, and interim storage (Goldinann 1997). Each MCO consists of a shell, shield plug, fuel baskets (Mark IA or Mark IV), and other incidental equipment. The Mark IA intact and scrap fuel baskets are a safety class item for criticality control and components necessary for criticality control will be constructed from 304L stainless steel. It is proposed that a copper divider subassembly be used in both Mark IA and Mark IV scrap baskets to increase the safety basis margin during cold vacuum drying. The use of copper would increase the heat conducted away from hot areas in the baskets out to the wall of the MCO by both radiative and conductive heat transfer means. Thus copper subassembly will likely be a safety significant component of the scrap fuel baskets. This report examines the structural, cost and corrosion consequences associated with using a copper subassembly in the stainless steel MCO scrap fuel baskets.

Graves, C.E.

1997-09-29T23:59:59.000Z

102

Observational constraints from SNe Ia and Gamma-Ray Bursts on a clumpy universe  

E-Print Network [OSTI]

The luminosity distance describing the effect of local inhomogeneities in the propagation of light proposed by Zeldovich-Kantowski-Dyer-Roeder (ZKDR) is tested with two probes for two distinct ranges of redshifts: supernovae Ia (SNe Ia) in 0.015 gamma-ray bursts (GRBs) in 1.547 < z < 3.57. Our analysis is performed by a Markov Chain Monte Carlo (MCMC) code that allows us to constrain the matter density parameter \\Omega_m as well as the smoothness parameter $\\alpha$ that measures the inhomogeneous-homogeneous rate of the cosmic fluid in a flat \\LambdaCDM model. The obtained best fits are (\\Omega_m=0.285^{+0.019}_{-0.018}, \\alpha= 0.856^{+0.106}_{-0.176}) from SNe Ia and (\\Omega_m=0.259^{+0.028}_{-0.028}, \\alpha=0.587^{+0.201}_{-0.202}) from GRBs, while from the joint analysis the best fits are (\\Omega_m=0.284^{+0.021}_{-0.020}, \\alpha= 0.685^{+0.164}_{-0.171}) with a \\chi^2_{\\rm red}=0.975. The value of the smoothness parameter $\\alpha$ indicates a clumped universe however it does not have an impact on the amount of dark energy (cosmological constant) needed to fit observations. This result may be an indication that the Dyer-Roeder approximation does not describe in a precise form the effects of clumpiness in the expansion of the universe.

Nora Bretn; Ariadna Montiel

2013-03-06T23:59:59.000Z

103

Especialista Universitario Java Enterprise Componentes de presentacin 2012-2013 Depto. Ciencia de la Computacin e IA Sesin 4  

E-Print Network [OSTI]

Especialista Universitario Java Enterprise Componentes de presentación © 2012-2013 Depto. Ciencia presentación © 2012-2013 Depto. Ciencia de la Computación e IA Sesión 4 Experto Universitario Java Enterprise Componentes de presentación © 2012-2013 Depto. Ciencia de la Computación e IA Sesión 4 Experto Universitario

Escolano, Francisco

104

Experto Universitario Java Enterprise Componentes de presentacin 2012-2013 Depto. Ciencia de la Computacin e IA Sesin 1  

E-Print Network [OSTI]

Experto Universitario Java Enterprise Componentes de presentación © 2012-2013 Depto. Ciencia de la Universitario Java Enterprise Componentes de presentación © 2012-2013 Depto. Ciencia de la Computación e IA Componentes de presentación © 2012-2013 Depto. Ciencia de la Computación e IA Sesión 1 Experto Universitario

Escolano, Francisco

105

Utilizing Type Ia Supernovae in a Large, Fast, Imaging Survey to Constrain Dark Energy  

Science Journals Connector (OSTI)

We study the utility of a large sample of Type Ia supernovae (SNe Ia) that might be observed in an imaging survey that rapidly scans a large fraction of the sky for constraining dark energy. We consider both the information contained in the traditional luminosity distance test as well as the spread in Ia SN fluxes at fixed redshift induced by gravitational lensing. As would be required from an imaging survey, we include a treatment of photometric redshift uncertainties in our analysis. Our primary result is that the information contained in the mean distance moduli of SNe Ia and the dispersion of SN Ia distance moduli complement each other, breaking a degeneracy between the present dark energy equation of state and its time variation without the need for a high-redshift (z 0.8) SN sample. Including lensing information also allows for some internal calibration of photometric redshifts. To address photometric redshift uncertainties, we present dark energy constraints as a function of the size of an external set of spectroscopically observed SNe that may be used for redshift calibration, N spec. Depending upon the details of potentially available, external SN data sets, we find that an imaging survey can constrain the dark energy equation of state at the epoch where it is best constrained w p, with a 1? error of ?(w p) ? 0.03-0.09. In addition, the marginal improvement in the error ?(w p) from an increase in the spectroscopic calibration sample drops once N spec ~ a few ? 103. This result is important because it is of the order of the size of calibration samples likely to be compiled in the coming decade and because, for samples of this size, the spectroscopic and imaging surveys individually place comparable constraints on the dark energy equation of state. In all cases, it is best to calibrate photometric redshifts with a set of spectroscopically observed SNe with relatively more objects at high redshift (z 0.5) than the parent sample of imaging SNe.

Andrew R. Zentner; Suman Bhattacharya

2009-01-01T23:59:59.000Z

106

CIMAT, VI Escuela de verano, 25 de julio 7 de agosto 1999 Introducci'on a la Geometr'ia de la Mec'anica Cl'asica  

E-Print Network [OSTI]

parametrizada por (x(t); ?? x(t)): (d) Dibujar las gr'aficas de su energ'ia cin'etica T = ( ?? x) 2 =2 y potencial­ vaci'on de energ'ia, E = T + V = constante: (e) Repetir los 4 incisos anteriores con x(1) = 2; ?? x(0CIMAT, VI Escuela de verano, 25 de julio ­ 7 de agosto 1999 Introducci'on a la Geometr'ia de la Mec

Bor, Gil

107

CIMAT, VI Escuela de verano, 25 de julio -7 de agosto 1999 Introducci'on a la Geometr'ia de la Mec'anica Cl'asica  

E-Print Network [OSTI]

(t), `x(t)). (d)Dibujar las gr'aficas de su energ'ia cin'etica T = (x`)2=2 y potencial* * V = x2- vaci'on de energ'ia, E = T + V = constante. (e)Repetir los 4 incisos anteriores con x(1) = 2, `x CIMAT, VI Escuela de verano, 25 de julio - 7 de agosto 1999 Introducci'on a la Geometr'ia de la

Bor, Gil

108

Study of the Detonation Phase in the Gravitationally Confined Detonation Model of Type Ia Supernovae  

Science Journals Connector (OSTI)

We study the gravitationally confined detonation (GCD) model of Type Ia supernovae (SNe Ia) through the detonation phase and into homologous expansion. In the GCD model, a detonation is triggered by the surface flow due to single-point, off-center flame ignition in carbon-oxygen white dwarfs (WDs). The simulations are unique in terms of the degree to which nonidealized physics is used to treat the reactive flow, including weak reaction rates and a time-dependent treatment of material in nuclear statistical equilibrium (NSE). Careful attention is paid to accurately calculating the final composition of material which is burned to NSE and frozen out in the rapid expansion following the passage of a detonation wave over the high-density core of the WD; and an efficient method for nucleosynthesis postprocessing is developed which obviates the need for costly network calculations along tracer particle thermodynamic trajectories. Observational diagnostics are presented for the explosion models, including abundance stratifications and integrated yields. We find that for all of the ignition conditions studied here a self-regulating process comprised of neutronization and stellar expansion results in final 56Ni masses of ~1.1M ?. But, more energetic models result in larger total NSE and stable Fe-peak yields. The total yield of intermediate mass elements is ~0.1M ? and the explosion energies are all around 1.5 ? 1051 erg. The explosion models are briefly compared to the inferred properties of recent SN Ia observations. The potential for surface detonation models to produce lower-luminosity (lower 56Ni mass) SNe is discussed.

Casey A. Meakin; Ivo Seitenzahl; Dean Townsley; George C. Jordan IV; James Truran; Don Lamb

2009-01-01T23:59:59.000Z

109

IS WX CEN A POSSIBLE TYPE Ia SUPERNOVA PROGENITOR WITH WIND-DRIVEN MASS TRANSFER?  

SciTech Connect (OSTI)

WX Cen is one of a few compact binary supersoft X-ray sources (CBSS) in the Galaxy that is a possible Type Ia supernova (SN Ia) progenitor. The supersoft X-ray radiation is explained as hydrostatic nuclear burning on the surface of the white dwarf component that is accreting hydrogen from a stellar companion at a high rate. If the mass donor in this system has a low mass, as has been suggested in the literature, one would expect a high wind-driven mass transfer rate. In that case, the orbital period of the system should increase. To test this theoretical prediction, we have monitored the system photometrically since 2010. By using four newly determined eclipse timings together with those collected from the literature, we discovered that the orbital period is decreasing at a rate of dP/dt = -5.15 Multiplication-Sign 10{sup -7} days yr{sup -1}. The long-term decrease in the orbital period is contrary to the prediction that the system is powered by wind-driven accretion. It therefore seems plausible that the mass donor could be more massive than the white dwarf, and that the mass transfer is driven by the thermal instability of the donor star. This finding suggests that WX Cen is a key object to check the physical mechanisms of mass accretion in CBSS. The corresponding timescale of the period change is about P/P-dot {approx} 0.81 x 10{sup 6} yr, indicating that WX Cen may evolve into an SNe Ia within one million years in the Galaxy.

Qian, S.-B.; Shi, G.; Zhu, L.-Y.; Liu, L.; Zhao, E.-G.; Li, L.-J. [Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, 650011 Kunming (China); Fernandez Lajus, E.; Di Sisto, R. P., E-mail: qsb@ynao.ac.cn [Facultad de Ciencias Astronomicas y Geofisicas, Universidad Nacional de La Plata, 1900 La Plata, Buenos Aires (Argentina)

2013-08-01T23:59:59.000Z

110

On the Thermonuclear Runaway in Type Ia Supernovae: How to run away?  

E-Print Network [OSTI]

Type Ia Supernovae are thought to be thermonuclear explosions of massive white dwarfs (WD). We present the first study of multi-dimensional effects during the final hours prior to the thermonuclear runaway which leads to the explosion. The calculations utilize an implicit, 2-D hydro code.Mixing and the ignition process are studied in detail. We find that the initial chemical structure of the WD is changed but the material is not fully homogenized. The exploding WD sustains a central region with a low C/O ratio. This implies that the explosive nuclear burning will begin in a partially C-depleted environment. The thermonuclear runaway happens in a well defined region close to the center. It is induced by compressional heat when matter is brought inwards by convective flows. We find no evidence for multiple spot or strong off-center ignition. Convective velocities are of the order of 100 km/sec which is well above the effective burning speeds in SNe Ia previously expected right after the runaway. For about 0.5 to 1 sec, the speed of the burning front will neither be determined by the laminar speed nor the Rayleigh-Taylor instabilities but by convective flows produced prior to the runaway. The consequences are discussed for our under- standing of the detailed physics of the flame propagation, the deflagration detonation transition, and the nucleosynthesis in the central layers. Our results strongly suggest the pre-conditioning of the progenitor as a key-factor for our understanding of the diversity in SNeIa.

P. Hoeflich; J. Stein

2001-12-07T23:59:59.000Z

111

Reconstruction of Hessence Dark Energy and the Latest Type Ia Supernovae Gold Dataset  

E-Print Network [OSTI]

Recently, many efforts have been made to build dark energy models whose equation-of-state parameter can cross the so-called phantom divide $w_{de}=-1$. One of them is the so-called hessence dark energy model in which the role of dark energy is played by a non-canonical complex scalar field. In this work, we develop a simple method based on Hubble parameter $H(z)$ to reconstruct the hessence dark energy. As examples, we use two familiar parameterizations for $H(z)$ and fit them to the latest 182 type Ia supernovae Gold dataset. In the reconstruction, measurement errors are fully considered.

Hao Wei; Ningning Tang; Shuang Nan Zhang

2007-02-28T23:59:59.000Z

112

Reconstruction of a Deceleration Parameter from the Latest Type Ia Supernovae Gold Dataset  

E-Print Network [OSTI]

In this paper, a parameterized deceleration parameter $q(z)= 1/2 - a/(1 + z)^b$ is reconstructed from the latest type Ia supernovae gold dataset. It is found out that the transition redshift from decelerated expansion to accelerated expansion is at $z_T=0.35^{+0.14}_{-0.07}$ with $1\\sigma$ confidence level in this parameterized deceleration parameter. And, the best fit values of parameters in $1\\sigma$ errors are $a=1.56^{+0.99}_{-0.55}$ and $b=3.82^{+3.70}_{-2.27}$.

Lixin Xu; Chengwu Zhang; Baorong Chang; Hongya Liu

2007-01-17T23:59:59.000Z

113

On the Stability of Thermonuclear Burning Fronts in Type Ia Supernovae  

E-Print Network [OSTI]

The propagation of cellularly stabilized thermonuclear flames is investigated by means of numerical simulations. In Type Ia supernova explosions the corresponding burning regime establishes at scales below the Gibson length. The cellular flame stabilization - which is a result of an interplay between the Landau-Darrieus instability and a nonlinear stabilization mechanism - is studied for the case of propagation into quiescent fuel as well as interaction with vortical fuel flows. Our simulations indicate that in thermonuclear supernova explosions stable cellular flames develop around the Gibson scale and that deflagration-to-detonation transition is unlikely to be triggered from flame evolution effects here.

F. K. Roepke; W. Hillebrandt

2004-04-26T23:59:59.000Z

114

Unbiased Estimate of Dark Energy Density from Type Ia Supernova Data  

Science Journals Connector (OSTI)

Type Ia supernovae (SNe Ia) are currently the best probes of the dark energy in the universe. To constrain the nature of dark energy, we assume a flat universe and that the weak energy condition is satisfied, and we allow the density of dark energy, ?X(z), to be an arbitrary function of redshift. Using simulated data from a space-based SN pencil-beam survey, we find that by optimizing the number of parameters used to parameterize the dimensionless dark energy density, f(z) = ?X(z)/?X(z = 0), we can obtain an unbiased estimate of both f(z) and the fractional matter density of the universe, ?m. A plausible SN pencil-beam survey (with a square degree field of view and for an observational duration of 1 yr) can yield about 2000 SNe Ia with 0 ? z ? 2. Such a survey in space would yield SN peak luminosities with a combined intrinsic and observational dispersion of ?(mint) = 0.16 mag. We find that for such an idealized survey, ?m can be measured to 10% accuracy, and the dark energy density can be estimated to ~20% to z ~ 1.5, and ~20%-40% to z ~ 2, depending on the time dependence of the true dark energy density. Dark energy densities that vary more slowly can be more accurately measured. For the anticipated Supernova/Acceleration Probe (SNAP) mission, ?m can be measured to 14% accuracy, and the dark energy density can be estimated to ~20% to z ~ 1.2. Our results suggest that SNAP may gain much sensitivity to the time dependence of the dark energy density and ?m by devoting more observational time to the central pencil-beam fields to obtain more SNe Ia at z > 1.2. We use both a maximum likelihood analysis and a Monte Carlo analysis (when appropriate) to determine the errors of estimated parameters. We find that the Monte Carlo analysis gives a more accurate estimate of the dark energy density than the maximum likelihood analysis.

Yun Wang; Geoffrey Lovelace

2001-01-01T23:59:59.000Z

115

One-dimensional delayed-detonation models of Type Ia supernovae: Confrontation to observations at bolometric maximum  

E-Print Network [OSTI]

The delayed-detonation explosion mechanism applied to a Chandrasekhar-mass white dwarf offers a very attractive model to explain the inferred characteristics of Type Ia supernovae (SNe Ia). The resulting ejecta are chemically stratified, have the same mass and roughly the same asymptotic kinetic energy, but exhibit a range in 56Ni mass. We investigate the contemporaneous photometric and spectroscopic properties of a sequence of delayed-detonation models, characterized by 56Ni masses between 0.18 and 0.81 Msun. Starting at 1d after explosion, we perform the full non-LTE, time-dependent radiative transfer with the code CMFGEN, with an accurate treatment of line blanketing, and compare our results to SNe Ia at bolometric maximum. Despite the 1D treatment, our approach delivers an excellent agreement to observations. We recover the range of SN Ia luminosities, colours, and spectral characteristics from the near-UV to 1 micron, for standard as well as low-luminosity 91bg-like SNe Ia. Our models predict an increase...

Blondin, Stphane; Hillier, D John; Khokhlov, Alexei M

2012-01-01T23:59:59.000Z

116

The p-Process in the Carbon Deflagration Model for Type Ia Supernovae and Chronology of the Solar System Formation  

SciTech Connect (OSTI)

We study nucleosynthesis of p-nuclei in the carbon deflagration model for Type Ia supernovae (SNe Ia) by assuming that seed nuclei are produced by the s-process in accreting layers on a carbon-oxygen white dwarf during mass accretion from a binary companion. We find that about 50 % of the p-nuclides are synthesized in proportion to the solar abundance and that p-isotopes of Mo and Ru which are significantly underproduced in Type II supernovae (SNe II) are produced up to a level close to other p-nuclei. Comparing the yields of iron and p-nuclei in SNe Ia we find that SNe Ia can contribute to the galactic evolution of the p-nuclei. Next, we consider nucleochronology of the solar system formation by using four radioactive nuclides and apply the result of the p-process nucleosynthesis to simple galactic chemical evolution models. We find that when assumed three phases of interstellar medium are mixed by the interdiffusion with the timescale of about 40 Myr 53Mn/55Mn value in the early solar system is consistent with a meteoritic value. In addition, we put constraints to a scenario that SNe Ia induce the core collapse of the molecular cloud, which leads to the formation of the solar system.

Kusakabe, Motohiko [Department of Astronomy, School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan); National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588 (Japan); Iwamoto, Nobuyuki [Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195 (Japan); Nomoto, Ken'ichi [Department of Astronomy, School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan)

2006-07-12T23:59:59.000Z

117

Stable isotope-assisted NMR characterization of interaction between lipid A and sarcotoxin IA, a cecropin-type antibacterial peptide  

SciTech Connect (OSTI)

Highlights: ? Recombinant sarcotoxin IA was successfully produced with {sup 13}C- and {sup 15}N-labeling. ? Sarcotoxin IA adopts an N-terminal ?-helix upon binding to lipid A-embedding micelles. ? Two lysine residues are involved in lipid A-mediated antibacterial activities. -- Abstract: Sarcotoxin IA is a 39-residue cecropin-type peptide from Sarcophaga peregrina. This peptide exhibits antibacterial activity against Gram-negative bacteria through its interaction with lipid A, a core component of lipopolysaccharides. To acquire detailed structural information on this specific interaction, we performed NMR analysis using bacterially expressed sarcotoxin IA analogs with {sup 13}C- and {sup 15}N-labeling along with lipid A-embedding micelles composed of dodecylphosphocholine. By inspecting the stable isotope-assisted NMR data, we revealed that the N-terminal segment (Leu3Arg18) of sarcotoxin IA formed an amphiphilic ?-helix upon its interaction with the aqueous micelles. Furthermore, chemical shift perturbation data indicated that the amino acid residues displayed on this ?-helix were involved in the specific interaction with lipid A. On the basis of these data, we successfully identified Lys4 and Lys5 as key residues in the interaction with lipid A and the consequent antibacterial activity. Therefore, these results provide unique information for designing chemotherapeutics based on antibacterial peptide structures.

Yagi-Utsumi, Maho [Institute for Molecular Science and Okazaki Institute for Integrative Bioscience, National Institutes of Natural Sciences, Okazaki 444-8787 (Japan) [Institute for Molecular Science and Okazaki Institute for Integrative Bioscience, National Institutes of Natural Sciences, Okazaki 444-8787 (Japan); Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya 467-8603 (Japan); Yamaguchi, Yoshiki [Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya 467-8603 (Japan) [Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya 467-8603 (Japan); Advanced Science Institute, RIKEN, Wako 351-0198 (Japan); Boonsri, Pornthip [Institute for Molecular Science and Okazaki Institute for Integrative Bioscience, National Institutes of Natural Sciences, Okazaki 444-8787 (Japan) [Institute for Molecular Science and Okazaki Institute for Integrative Bioscience, National Institutes of Natural Sciences, Okazaki 444-8787 (Japan); Department of Chemistry, Faculty of Science, Kasetsart University, Bangkok 10900 (Thailand); Iguchi, Takeshi [Bioscience Research Laboratory, Fujiya Co., Ltd., Hadano, Kanagawa 257-0031 (Japan)] [Bioscience Research Laboratory, Fujiya Co., Ltd., Hadano, Kanagawa 257-0031 (Japan); Okemoto, Kazuo [Department of Biochemistry and Cell Biology, National Institute of Infectious Disease, Tokyo 162-8640 (Japan)] [Department of Biochemistry and Cell Biology, National Institute of Infectious Disease, Tokyo 162-8640 (Japan); Natori, Shunji [National Institute of Agrobiological Sciences, Tsukuba 305-8602 (Japan)] [National Institute of Agrobiological Sciences, Tsukuba 305-8602 (Japan); Kato, Koichi, E-mail: kkatonmr@ims.ac.jp [Institute for Molecular Science and Okazaki Institute for Integrative Bioscience, National Institutes of Natural Sciences, Okazaki 444-8787 (Japan) [Institute for Molecular Science and Okazaki Institute for Integrative Bioscience, National Institutes of Natural Sciences, Okazaki 444-8787 (Japan); Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya 467-8603 (Japan); The Glycoscience Institute, Ochanomizu University, Tokyo 135-0064 (Japan); GLYENCE Co., Ltd., Nagoya 474-0858 (Japan)

2013-02-08T23:59:59.000Z

118

Inference for the dark energy equation of state using Type IA supernova data  

E-Print Network [OSTI]

The surprising discovery of an accelerating universe led cosmologists to posit the existence of "dark energy"--a mysterious energy field that permeates the universe. Understanding dark energy has become the central problem of modern cosmology. After describing the scientific background in depth, we formulate the task as a nonlinear inverse problem that expresses the comoving distance function in terms of the dark-energy equation of state. We present two classes of methods for making sharp statistical inferences about the equation of state from observations of Type Ia Supernovae (SNe). First, we derive a technique for testing hypotheses about the equation of state that requires no assumptions about its form and can distinguish among competing theories. Second, we present a framework for computing parametric and nonparametric estimators of the equation of state, with an associated assessment of uncertainty. Using our approach, we evaluate the strength of statistical evidence for various competing models of dark energy. Consistent with current studies, we find that with the available Type Ia SNe data, it is not possible to distinguish statistically among popular dark-energy models, and that, in particular, there is no support in the data for rejecting a cosmological constant. With much more supernova data likely to be available in coming years (e.g., from the DOE/NASA Joint Dark Energy Mission), we address the more interesting question of whether future data sets will have sufficient resolution to distinguish among competing theories.

Christopher Genovese; Peter Freeman; Larry Wasserman; Robert Nichol; Christopher Miller

2008-05-27T23:59:59.000Z

119

Flame-driven deflagration-to-detonation transitions in Type Ia supernovae?  

E-Print Network [OSTI]

Although delayed detonation models of thermonuclear explosions of white dwarfs seem promising for reproducing Type Ia supernovae, the transition of the flame propagation mode from subsonic deflagration to supersonic detonation remains hypothetical. A potential instant for this transition to occur is the onset of the distributed burning regime, i.e. the moment when turbulence first affects the internal flame structure. Some studies of the burning microphysics indicate that a deflagration-to-detonation transition may be possible here, provided the turbulent intensities are strong enough. Consequently, the magnitude of turbulent velocity fluctuations generated by the deflagration flame is analyzed at the onset of the distributed burning regime in several three-dimensional simulations of deflagrations in thermonuclear supernovae. It is shown that the corresponding probability density functions fall off towards high turbulent velocity fluctuations much more slowly than a Gaussian distribution. Thus, values claimed to be necessary for triggering a detonation are likely to be found in sufficiently large patches of the flame. Although the microphysical evolution of the burning is not followed and a successful deflagration-to-detonation transition cannot be guaranteed from simulations presented here, the results still indicate that such events may be possible in Type Ia supernova explosions.

F. K. Roepke

2007-09-26T23:59:59.000Z

120

Flame Evolution During Type Ia Supernovae and the Deflagration Phase in the Gravitationally Confined Detonation Scenario  

E-Print Network [OSTI]

We develop an improved method for tracking the nuclear flame during the deflagration phase of a Type Ia supernova, and apply it to study the variation in outcomes expected from the gravitationally confined detonation (GCD) paradigm. A simplified 3-stage burning model and a non-static ash state are integrated with an artificially thickened advection-diffusion-reaction (ADR) flame front in order to provide an accurate but highly efficient representation of the energy release and electron capture in and after the unresolvable flame. We demonstrate that both our ADR and energy release methods do not generate significant acoustic noise, as has been a problem with previous ADR-based schemes. We proceed to model aspects of the deflagration, particularly the role of buoyancy of the hot ash, and find that our methods are reasonably well-behaved with respect to numerical resolution. We show that if a detonation occurs in material swept up by the material ejected by the first rising bubble but gravitationally confined to the white dwarf (WD) surface (the GCD paradigm), the density structure of the WD at detonation is systematically correlated with the distance of the deflagration ignition point from the center of the star. Coupled to a suitably stochastic ignition process, this correlation may provide a plausible explanation for the variety of nickel masses seen in Type Ia Supernovae.

D. M. Townsley; A. C. Calder; S. M. Asida; I. R. Seitenzahl; F. Peng; N. Vladimirova; D. Q. Lamb; J. W. Truran

2007-06-07T23:59:59.000Z

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121

Constraining a bulk viscous matter-dominated cosmological model using SNe Ia, CMB and LSS  

E-Print Network [OSTI]

We present and constrain a cosmological model which component is a pressureless fluid with bulk viscosity as an explanation for the present accelerated expansion of the universe. We study the particular model of a constant bulk viscosity coefficient \\zeta_m. The possible values of \\zeta_m are constrained using the cosmological tests of SNe Ia Gold 2006 sample, the CMB shift parameter R from the three-year WMAP observations, the Baryon Acoustic Oscillation (BAO) peak A from the Sloan Digital Sky Survey (SDSS) and the Second Law of Thermodynamics (SLT). It was found that this model is in agreement with the SLT using only the SNe Ia test. However when the model is submitted to the three cosmological tests together (SNe+CMB+BAO) the results are: 1.- the model violates the SLT, 2.- predicts a value of H_0 \\approx 53 km sec^{-1} Mpc^{-1} for the Hubble constant, and 3.- we obtain a bad fit to data with a \\chi^2_{min} \\approx 400 (\\chi^2_{d.o.f.} \\approx 2.2). These results indicate that this model is ruled out by the observations.

Arturo Avelino; U. Nucamendi; F. S. Guzmn

2008-01-10T23:59:59.000Z

122

Parametrizing the transition to the phantom epoch with Supernovae Ia and Standard Rulers  

E-Print Network [OSTI]

The properties of some particular parametrizations of the dark energy Equation of State (EoS) are studied by using Supernovae Ia data (HST Cluster Supernova Survey) combined with Standard Ruler datasets (Cosmic Microwave Background (CMB) and Baryon Acoustic Oscillations (BAO)). In this sense, we propose some parametrizations that may present a (fast) transition to a phantom dark energy EoS (where $w_{DE}<-1$) and compare the results with the $\\Lambda$CDM model. The best fit of the models is obtained by using Sne Ia and Standard Ruler datasets, which provides some information about whether the phantom transition may be supported by the observations. In this regard, the crossing of the phantom barrier is allowed statistically but the occurrence of a future singularity seems unlikely. Furthermore, the reconstruction of a (non-)canonical scalar field Lagrangian from the EoS parameter is studied, where shown that EoS parametrizations can be well reconstructed in terms of scalar fields.

Leanizbarrutia, Iker

2014-01-01T23:59:59.000Z

123

Verifying the Cosmological Utility of Type Ia Supernovae:Implications of a Dispersion in the Ultraviolet Spectra  

SciTech Connect (OSTI)

We analyze the mean rest-frame ultraviolet (UV) spectrum ofType Ia Supernovae(SNe) and its dispersion using high signal-to-noiseKeck-I/LRIS-B spectroscopyfor a sample of 36 events at intermediateredshift (z=0.5) discoveredby the Canada-France-Hawaii TelescopeSupernova Legacy Survey (SNLS). Weintroduce a new method for removinghost galaxy contamination in our spectra,exploiting the comprehensivephotometric coverage of the SNLS SNe and theirhost galaxies, therebyproviding the first quantitative view of the UV spectralproperties of alarge sample of distant SNe Ia. Although the mean SN Ia spectrumhas notevolved significantly over the past 40 percent of cosmic history,preciseevolutionary constraints are limited by the absence of acomparable sample ofhigh quality local spectra. The mean UV spectrum ofour z 0.5 SNe Ia and itsdispersion is tabulated for use in futureapplications. Within the high-redshiftsample, we discover significant UVspectral variations and exclude dust extinctionas the primary cause byexamining trends with the optical SN color. Although progenitormetallicity may drive some of these trends, the variations we see aremuchlarger than predicted in recent models and do not follow expectedpatterns.An interesting new result is a variation seen in the wavelengthof selected UVfeatures with phase. We also demonstrate systematicdifferences in the SN Iaspectral features with SN lightcurve width inboth the UV and the optical. Weshow that these intrinsic variations couldrepresent a statistical limitation in thefuture use of high-redshift SNeIa for precision cosmology. We conclude thatfurther detailed studies areneeded, both locally and at moderate redshift wherethe rest-frame UV canbe studied precisely, in order that future missions canconfidently beplanned to fully exploit SNe Ia as cosmological probes.

Ellis, R.S.; Sullivan, M.; Nugent, P.E.; Howell, D.A.; Gal-Yam,A.; Astier, P.; Balam, D.; Balland, C.; Basa, S.; Carlberg, R.G.; Conley,A.; Fouchez, D.; Guy, J.; Hardin, D.; Hook, I.; Pain, R.; Perrett, K.; Pritchet, C.J.; Regnault, N.

2007-11-02T23:59:59.000Z

124

CIMAT, VIII Escuela de verano, 30 de julio -10 de ago* Introducci'on a la Geometr'ia de la Mec'ani*  

E-Print Network [OSTI]

conservativo. 18.Sea A(E) el 'area dentro de una curva de fase cerrada que corresponde a nive* *l de energ'ia Introducci'on a la Geometr'ia de la Mec'ani* *ca Cl'asica Problemas 13 - 19

Bor, Gil

125

LATE-TIME SPECTRAL OBSERVATIONS OF THE STRONGLY INTERACTING TYPE Ia SUPERNOVA PTF11kx  

SciTech Connect (OSTI)

PTF11kx was a Type Ia supernova (SN Ia) that showed time-variable absorption features, including saturated Ca II H and K lines that weakened and eventually went into emission. The strength of the emission component of H{alpha} gradually increased, implying that the SN was undergoing significant interaction with its circumstellar medium (CSM). These features, and many others, were blueshifted slightly and showed a P-Cygni profile, likely indicating that the CSM was directly related to, and probably previously ejected by, the progenitor system itself. These and other observations led Dilday et al. to conclude that PTF11kx came from a symbiotic nova progenitor like RS Oph. In this work we extend the spectral coverage of PTF11kx to 124-680 rest-frame days past maximum brightness. The late-time spectra of PTF11kx are dominated by H{alpha} emission (with widths of full width at half-maximum intensity Almost-Equal-To 2000 km s{sup -1}), strong Ca II emission features ({approx}10,000 km s{sup -1} wide), and a blue 'quasi-continuum' due to many overlapping narrow lines of Fe II. Emission from oxygen, He I, and Balmer lines higher than H{alpha} is weak or completely absent at all epochs, leading to large observed H{alpha}/H{beta} intensity ratios. The H{alpha} emission appears to increase in strength with time for {approx}1 yr, but it subsequently decreases significantly along with the Ca II emission. Our latest spectrum also indicates the possibility of newly formed dust in the system as evidenced by a slight decrease in the red wing of H{alpha}. During the same epochs, multiple narrow emission features from the CSM temporally vary in strength. The weakening of the H{alpha} and Ca II emission at late times is possible evidence that the SN ejecta have overtaken the majority of the CSM and agrees with models of other strongly interacting SNe Ia. The varying narrow emission features, on the other hand, may indicate that the CSM is clumpy or consists of multiple thin shells.

Silverman, Jeffrey M. [Department of Astronomy, University of Texas, Austin, TX 78712-0259 (United States); Nugent, Peter E.; Filippenko, Alexei V.; Cenko, S. Bradley [Department of Astronomy, University of California, Berkeley, CA 94720-3411 (United States); Gal-Yam, Avishay [Benoziyo Center for Astrophysics, The Weizmann Institute of Science, Rehovot 76100 (Israel); Sullivan, Mark [School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ (United Kingdom); Howell, D. Andrew [Las Cumbres Observatory Global Telescope Network, Goleta, CA 93117 (United States); Pan, Yen-Chen; Hook, Isobel M., E-mail: jsilverman@astro.as.utexas.edu [Department of Physics (Astrophysics), University of Oxford, Keble Road, Oxford OX1 3RH (United Kingdom)

2013-08-01T23:59:59.000Z

126

Type Ia supernova diversity: white dwarf central density as a secondary parameter in three-dimensional delayed detonation models  

Science Journals Connector (OSTI)

......function of redshift. The standard model of SNe Ia relies on the nuclear fusion of the initial composition (predominantly 12C and 16O) of...generated from a Monte Carlo based algorithm. The primary input parameters are the number of the ignition kernels and the......

I. R. Seitenzahl; F. Ciaraldi-Schoolmann; F. K. Rpke

2011-07-01T23:59:59.000Z

127

EARLY RADIO AND X-RAY OBSERVATIONS OF THE YOUNGEST NEARBY TYPE Ia SUPERNOVA PTF 11kly (SN 2011fe)  

SciTech Connect (OSTI)

On 2011 August 24 (UT) the Palomar Transient Factory (PTF) discovered PTF11kly (SN 2011fe), the youngest and most nearby Type Ia supernova (SN Ia) in decades. We followed this event up in the radio (centimeter and millimeter bands) and X-ray bands, starting about a day after the estimated explosion time. We present our analysis of the radio and X-ray observations, yielding the tightest constraints yet placed on the pre-explosion mass-loss rate from the progenitor system of this supernova. We find a robust limit of M-dot {approx}<10{sup -8}(w/100 km s{sup -1}) M{sub sun} yr{sup -1} from sensitive X-ray non-detections, as well as a similar limit from radio data, which depends, however, on assumptions about microphysical parameters. We discuss our results in the context of single-degenerate models for SNe Ia and find that our observations modestly disfavor symbiotic progenitor models involving a red giant donor, but cannot constrain systems accreting from main-sequence or sub-giant stars, including the popular supersoft channel. In view of the proximity of PTF11kly and the sensitivity of our prompt observations, we would have to wait for a long time (a decade or longer) in order to more meaningfully probe the circumstellar matter of SNe Ia.

Horesh, Assaf; Kulkarni, S. R.; Carpenter, John; Kasliwal, Mansi M.; Ofek, Eran O. [Cahill Center for Astrophysics, California Institute of Technology, Pasadena, CA 91125 (United States); Fox, Derek B. [Astronomy and Astrophysics, Eberly College of Science, Pennsylvania State University, University Park, PA 16802 (United States); Quimby, Robert [IPMU, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa-shi, Chiba (Japan); Gal-Yam, Avishay [Benoziyo Center for Astrophysics, Faculty of Physics, Weizmann Institute of Science, Rehovot 76100 (Israel); Cenko, S. Bradley [Department of Astronomy, University of California, Berkeley, CA 94720-3411 (United States); De Bruyn, A. G. [Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, NL-7990 AA Dwingeloo (Netherlands); Kamble, Atish; Wijers, Ralph A. M. J. [Center for Gravitation and Cosmology, University of Wisconsin, Milwaukee, WI 53211 (United States); Van der Horst, Alexander J. [Universities Space Research Association, NSSTC, Huntsville, AL 35805 (United States); Kouveliotou, Chryssa [Space Science Office, VP-62, NASA-Marshall Space Flight Center, Huntsville, AL 35805 (United States); Podsiadlowski, Philipp; Sullivan, Mark; Maguire, Kate [Department of Physics (Astrophysics), University of Oxford, Keble Road, Oxford OX1 3RH (United Kingdom); Howell, D. Andrew [Las Cumbres Observatory Global Telescope Network, Santa Barbara, CA 93117 (United States); Nugent, Peter E. [Computational Cosmology Center, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (United States); Gehrels, Neil [NASA-Goddard Space Flight Center, Greenbelt, MD 20771 (United States); and others

2012-02-10T23:59:59.000Z

128

Experto Universitario Java Enterprise Validacin e internacionalizacin 2012-2013 Depto. Ciencia de la Computacin e IA Spring  

E-Print Network [OSTI]

Experto Universitario Java Enterprise Validación e internacionalización © 2012-2013 Depto. Ciencia #12;Experto Universitario Java Enterprise Validación e internacionalización © 2012-2013 Depto. Ciencia Java Enterprise Validación e internacionalización © 2012-2013 Depto. Ciencia de la Computación e IA

Escolano, Francisco

129

TheThe ScienceScience ForumForum (as I(as I picturepicture itit)) Scholarly work  

E-Print Network [OSTI]

#12;Robotics TheThe ScienceScience ForumForum (as I(as I picturepicture itit)) Humanities Scholarly of photonics, robotics, telematics, dynamic physical rendering and intelligent sensors served as the basis to inspire four bestselling authors. The results are four short stories which paint amusing, thought

Torras, Carme

130

EXCELLENTIA CoLumbIA ENgINEErINg66 echanical engineers think about the design, construction, material proper-  

E-Print Network [OSTI]

responsibility for understanding how engines work, how buildings can be more efficiently built, and howHEALTH EXCELLENTIA CoLumbIA ENgINEErINg66 M echanical engineers think about the design the environment affects bridge architecture. They also apply their knowledge to the workings of the human body

Hone, James

131

ANALYSIS OF LIMIT CYCLE STABILITY IN A TAP-CHANGING TRANSFORMER V. Donde I.A. Hiskens  

E-Print Network [OSTI]

ANALYSIS OF LIMIT CYCLE STABILITY IN A TAP-CHANGING TRANSFORMER V. Donde I.A. Hiskens Department of transformer tap changing and load dynamics. Lin- earization of a Poincar´e map is used to prove local of the region of attraction can then be obtained. 1. INTRODUCTION Interactions between tap-changing transformers

Hiskens, Ian A.

132

A Precision Photometric Comparison between SDSS-II and CSP Type Ia Supernova Data  

E-Print Network [OSTI]

Consistency between Carnegie Supernova Project (CSP) and SDSS-II supernova (SN) survey ugri measurements has been evaluated by comparing SDSS and CSP photometry for nine spectroscopically confirmed Type Ia supernova observed contemporaneously by both programs. The CSP data were transformed into the SDSS photometric system. Sources of systematic uncertainty have been identified, quantified, and shown to be at or below the 0.023 magnitude level in all bands. When all photometry for a given band is combined, we find average magnitude differences of equal to or less than 0.011 magnitudes in ugri, with rms scatter ranging from 0.043 to 0.077 magnitudes. The u band agreement is promising, with the caveat that only four of the nine supernovae are well-observed in u and these four exhibit an 0.038 magnitude supernova-to-supernova scatter in this filter.

Mosher, J; Corlies, L; Folatelli, G; Frieman, J; Holtzman, J; Jha, S W; Kessler, R; Marriner, J; Phillips, M M; Stritzinger, M; Morrell, N; Schneider, D P

2012-01-01T23:59:59.000Z

133

Beyond the bubble catastrophe of Type Ia supernovae: Pulsating Reverse Detonation models  

E-Print Network [OSTI]

We describe a mechanism by which a failed deflagration of a Chandrasekhar-mass carbon-oxygen white dwarf can turn into a successful thermonuclear supernova explosion, without invoking an ad hoc high-density deflagration-detonation transition. Following a pulsating phase, an accretion shock develops above a core of 1 M_sun composed of carbon and oxygen, inducing a converging detonation. A three-dimensional simulation of the explosion produced a kinetic energy of 1.05E51 ergs and 0.70 M_sun of 56Ni, ejecting scarcely 0.01 M_sun of C-O moving at low velocities. The mechanism works under quite general conditions and is flexible enough to account for the diversity of normal Type Ia supernovae. In given conditions the detonation might not occur, which would reflect in peculiar signatures in the gamma and UV-wavelengths

Eduardo Bravo; Domingo Garcia-Senz

2006-04-03T23:59:59.000Z

134

Sensitivity study of explosive nucleosynthesis in type Ia supernovae: Modification of individual thermonuclear reaction rates  

Science Journals Connector (OSTI)

Background: Type Ia supernovae contribute significantly to the nucleosynthesis of many Fe-group and intermediate-mass elements. However, the robustness of nucleosynthesis obtained via models of this class of explosions has not been studied in depth until now.Purpose: We explore the sensitivity of the nucleosynthesis resulting from thermonuclear explosions of massive white dwarfs with respect to uncertainties in nuclear reaction rates. We put particular emphasis on indentifying the individual reactions rates that most strongly affect the isotopic products of these supernovae.Method: We have adopted a standard one-dimensional delayed detonation model of the explosion of a Chandrasekhar-mass white dwarf and have postprocessed the thermodynamic trajectories of every mass shell with a nucleosynthetic code to obtain the chemical composition of the ejected matter. We have considered increases (decreases) by a factor of 10 on the rates of 1196 nuclear reactions (simultaneously with their inverse reactions), repeating the nucleosynthesis calculations after modification of each reaction rate pair. We have computed as well hydrodynamic models for different rates of the fusion reactions of 12C and of 16O. From the calculations we have selected the reactions that have the largest impact on the supernova yields, and we have computed again the nucleosynthesis using two or three alternative prescriptions for their rates, taken from the JINA REACLIB database. For the three reactions with the largest sensitivity we have analyzed as well the temperature ranges where a modification of their rates has the strongest effect on nucleosynthesis.Results: The nucleosynthesis resulting from the type Ia supernova models is quite robust with respect to variations of nuclear reaction rates, with the exception of the reaction of fusion of two 12C nuclei. The energy of the explosion changes by less than ?4% when the rates of the reactions 12C+12C or 16O+16O are multiplied by a factor of 10 or 0.1. The changes in the nucleosynthesis owing to the modification of the rates of these fusion reactions are also quite modest; for instance, no species with a mass fraction larger than 0.02 experiences a variation of its yield larger than a factor of 2. We provide the sensitivity of the yields of the most abundant species with respect to the rates of the most intense reactions with protons, neutrons, and ?. In general, the yields of Fe-group nuclei are more robust than the yields of intermediate-mass elements. Among the species with yields larger than 10?8M?, 35S has the largest sensitivity to the nuclear reaction rates. It is remarkable that the reactions involving elements with Z>22 have a tiny influence on the supernova nucleosynthesis. Among the charged-particle reactions, the most influential on supernova nucleosynthesis are 30Si+p?31P+?, 20Ne+??24Mg+?, and 24Mg+??27Al+p. The temperatures at which a modification of their rate has a larger impact are in the range 2?T?4 GK.Conclusions: The explosion model (i.e., the assumed conditions and propagation of the flame) chiefly determines the element production of type Ia supernovae and derived quantities such as their luminosity, while the nuclear reaction rates used in the simulations have a small influence on the kinetic energy and final chemical composition of the ejecta. Our results show that the uncertainty in individual thermonuclear reaction rates cannot account for discrepancies of a factor of 2 between isotopic ratios in type Ia supernovae and those in the solar system, especially within the Fe group.

Eduardo Bravo and Gabriel Martnez-Pinedo

2012-05-18T23:59:59.000Z

135

A PRECISION PHOTOMETRIC COMPARISON BETWEEN SDSS-II AND CSP TYPE Ia SUPERNOVA DATA  

SciTech Connect (OSTI)

Consistency between Carnegie Supernova Project (CSP) and SDSS-II Supernova Survey ugri measurements has been evaluated by comparing Sloan Digital Sky Survey (SDSS) and CSP photometry for nine spectroscopically confirmed Type Ia supernova observed contemporaneously by both programs. The CSP data were transformed into the SDSS photometric system. Sources of systematic uncertainty have been identified, quantified, and shown to be at or below the 0.023 mag level in all bands. When all photometry for a given band is combined, we find average magnitude differences of equal to or less than 0.011 mag in ugri, with rms scatter ranging from 0.043 to 0.077 mag. The u-band agreement is promising, with the caveat that only four of the nine supernovae are well observed in u and these four exhibit an 0.038 mag supernova-to-supernova scatter in this filter.

Mosher, J.; Sako, M.; Corlies, L. [Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104 (United States); Folatelli, G. [Institute for the Physics and Mathematics of the Universe (IPMU), University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583 (Japan); Frieman, J.; Kessler, R. [Department of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637 (United States); Holtzman, J. [Department of Astronomy, MSC 4500, New Mexico State University, P.O. Box 30001, Las Cruces, NM 88003 (United States); Jha, S. W. [Department of Physics and Astronomy, Rutgers, the State University of New Jersey, 136 Frelinghuysen Road, Piscataway, NJ 08854 (United States); Marriner, J. [Center for Particle Astrophysics, Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510 (United States); Phillips, M. M.; Morrell, N. [Las Campanas Observatory, Carnegie Observatories, Casilla 601, La Serena (Chile); Stritzinger, M. [Oskar Klein Centre for Cosmo Particle Physics, AlbaNova University Center, 106 91 Stockholm (Sweden); Schneider, D. P., E-mail: jmosher@sas.upenn.edu [Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802 (United States)

2012-07-15T23:59:59.000Z

136

A Precision Photometric Comparison between SDSS-II and CSP Type Ia Supernova Data  

SciTech Connect (OSTI)

Consistency between Carnegie Supernova Project (CSP) and SDSS-II Supernova Survey ugri measurements has been evaluated by comparing Sloan Digital Sky Survey (SDSS) and CSP photometry for nine spectroscopically confirmed Type Ia supernova observed contemporaneously by both programs. The CSP data were transformed into the SDSS photometric system. Sources of systematic uncertainty have been identified, quantified, and shown to be at or below the 0.023 mag level in all bands. When all photometry for a given band is combined, we find average magnitude differences of equal to or less than 0.011 mag in ugri, with rms scatter ranging from 0.043 to 0.077 mag. The u-band agreement is promising, with the caveat that only four of the nine supernovae are well observed in u and these four exhibit an 0.038 mag supernova-to-supernova scatter in this filter.

Mosher, J.; /Pennsylvania U.; Sako, M.; /Pennsylvania U.; Corlies, L.; /Pennsylvania U. /Columbia U.; Folatelli, G.; /Tokyo U. /Carnegie Inst. Observ.; Frieman, J.; /Chicago U., KICP /Chicago U., Astron. Astrophys. Ctr.; Holtzman, J.; /New Mexico State U.; Jha, S.W.; /Rutgers U., Piscataway; Kessler, R.; /Chicago U., Astron. Astrophys. Ctr. /Chicago U., KICP; Marriner, J.; /Fermilab; Phillips, M.M.; /Carnegie Inst. Observ.; Stritzinger, M.; /Aarhus U. /Stockholm U., OKC /Bohr Inst. /Carnegie Inst. Observ.

2012-06-01T23:59:59.000Z

137

{chi}{sup 2} versus median statistics in supernova type Ia data analysis  

SciTech Connect (OSTI)

In this paper we compare the performances of the {chi}{sup 2} and median likelihood analysis in the determination of cosmological constraints using type Ia supernovae data. We perform a statistical analysis using the 307 supernovae of the Union 2 compilation of the Supernova Cosmology Project and find that the {chi}{sup 2} statistical analysis yields tighter cosmological constraints than the median statistic if only supernovae data is taken into account. We also show that when additional measurements from the cosmic microwave background and baryonic acoustic oscillations are considered, the combined cosmological constraints are not strongly dependent on whether one applies the {chi}{sup 2} statistic or the median statistic to the supernovae data. This indicates that, when complementary information from other cosmological probes is taken into account, the performances of the {chi}{sup 2} and median statistics are very similar, demonstrating the robustness of the statistical analysis.

Barreira, A. [Centro de Fisica do Porto, Rua do Campo Alegre 687, 4169-007 Porto (Portugal); Departamento de Fisica da Faculdade de Ciencias da Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto (Portugal); Avelino, P. P. [Departamento de Fisica da Faculdade de Ciencias da Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto (Portugal); Centro de Astrofisica da Universidade do Porto, Rua das Estrelas, 4150-762 Porto (Portugal)

2011-10-15T23:59:59.000Z

138

Small-scale Interaction of Turbulence with Thermonuclear Flames in Type Ia Supernovae  

E-Print Network [OSTI]

Microscopic turbulence-flame interactions of thermonuclear fusion flames occuring in Type Ia Supernovae were studied by means of incompressible direct numerical simulations with a highly simplified flame description. The flame is treated as a single diffusive scalar field with a nonlinear source term. It is characterized by its Prandtl number, Pr << 1, and laminar flame speed, S_L. We find that if S_L ~ u', where u' is the rms amplitude of turbulent velocity fluctuations, the local flame propagation speed does not significantly deviate from S_L even in the presence of velocity fluctuations on scales below the laminar flame thickness. This result is interpreted in the context of subgrid-scale modeling of supernova explosions and the mechanism for deflagration-detonation-transitions.

J. C. Niemeyer; W. K. Bushe; G. R. Ruetsch

1999-05-07T23:59:59.000Z

139

Initiation of the Detonation in the Gravitationally Confined Detonation Model of Type Ia Supernovae  

Science Journals Connector (OSTI)

We study the initiation of the detonation in the gravitationally confined detonation (GCD) model of Type Ia supernovae (SNe Ia). In this model, ignition occurs at one or several off-center points, resulting in a burning bubble of hot ash that rises rapidly, breaks through the surface of the star, and collides at a point on the stellar surface opposite the breakout, producing a high-velocity inwardly directed flow. Initiation of the detonation occurs spontaneously in a region where the length scale of the temperature gradient extending from the flow (in which carbon burning is already occurring) into unburned fuel is commensurate to the range of critical length scales which have been derived from one-dimensional simulations that resolve the initiation of a detonation. By increasing the maximum resolution in a truncated cone that encompasses this region, beginning somewhat before initiation of the detonation occurs, we successfully simulate in situ the first gradient-initiated detonation in a whole-star simulation. The detonation emerges when a compression wave overruns a pocket of fuel situated in a Kelvin-Helmholtz cusp at the leading edge of the inwardly directed jet of burning carbon. The compression wave preconditions the temperature in the fuel in such a way that the Zel'dovich gradient mechanism can operate and a detonation ensues. We explore the dependence of the length scale of the temperature gradient on spatial resolution and discuss the implications for the robustness of this detonation mechanism. We find that the time and the location at which initiation of the detonation occurs varies with resolution. In particular, initiation of a detonation had not yet occurred in our highest resolution simulation by the time we ended the simulation because of the computational demand it required. However, it may detonate later. We suggest that the turbulent shear layer surrounding the inwardly directed jet provides the most favorable physical conditions, and therefore the most likely location, for initiation of a detonation in the GCD model.

Ivo R. Seitenzahl; Casey A. Meakin; Don Q. Lamb; James W. Truran

2009-01-01T23:59:59.000Z

140

Study of the Detonation Phase in the Gravitationally Confined Detonation Model of Type Ia Supernovae  

E-Print Network [OSTI]

We study the gravitationally confined detonation (GCD) model of Type Ia supernovae through the detonation phase and into homologous expansion. In the GCD model, a detonation is triggered by the surface flow due to single point, off-center flame ignition in carbon-oxygen white dwarfs. The simulations are unique in terms of the degree to which non-idealized physics is used to treat the reactive flow, including weak reaction rates and a time dependent treatment of material in nuclear statistical equilibrium (NSE). Careful attention is paid to accurately calculating the final composition of material which is burned to NSE and frozen out in the rapid expansion following the passage of a detonation wave over the high density core of the white dwarf; and an efficient method for nucleosynthesis post-processing is developed which obviates the need for costly network calculations along tracer particle thermodynamic trajectories. Observational diagnostics are presented for the explosion models, including abundance stratifications and integrated yields. We find that for all of the ignition conditions studied here, a self regulating process comprised of neutronization and stellar expansion results in final \\iso{Ni}{56} masses of $\\sim$1.1\\msun. But, more energetic models result in larger total NSE and stable Fe peak yields. The total yield of intermediate mass elements is $\\sim0.1$\\msun and the explosion energies are all around 1.5$\\times10^{51}$ ergs. The explosion models are briefly compared to the inferred properties of recent Type Ia supernova observations. The potential for surface detonation models to produce lower luminosity (lower \\iso{Ni}{56} mass) supernovae is discussed.

Casey A. Meakin; Ivo Seitenzahl; Dean Townsley; George C. Jordan IV; James Truran; Don Lamb

2008-06-30T23:59:59.000Z

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141

Initiation of the detonation in the gravitationally confined detonation model of type Ia supernovae.  

SciTech Connect (OSTI)

We study the initiation of the detonation in the gravitationally confined detonation (GCD) model of Type Ia supernovae (SNe Ia). In this model, ignition occurs at one or several off-center points, resulting in a burning bubble of hot ash that rises rapidly, breaks through the surface of the star, and collides at a point on the stellar surface opposite the breakout, producing a high-velocity inwardly directed flow. Initiation of the detonation occurs spontaneously in a region where the length scale of the temperature gradient extending from the flow (in which carbon burning is already occurring) into unburned fuel is commensurate to the range of critical length scales which have been derived from one-dimensional simulations that resolve the initiation of a detonation. By increasing the maximum resolution in a truncated cone that encompasses this region, beginning somewhat before initiation of the detonation occurs, we successfully simulate in situ the first gradient-initiated detonation in a whole-star simulation. The detonation emerges when a compression wave overruns a pocket of fuel situated in a Kelvin-Helmholtz cusp at the leading edge of the inwardly directed jet of burning carbon. The compression wave preconditions the temperature in the fuel in such a way that the Zel'dovich gradient mechanism can operate and a detonation ensues. We explore the dependence of the length scale of the temperature gradient on spatial resolution and discuss the implications for the robustness of this detonation mechanism. We find that the time and the location at which initiation of the detonation occurs varies with resolution. In particular, initiation of a detonation had not yet occurred in our highest resolution simulation by the time we ended the simulation because of the computational demand it required. However, it may detonate later. We suggest that the turbulent shear layer surrounding the inwardly directed jet provides the most favorable physical conditions, and therefore the most likely location, for initiation of a detonation in the GCD model.

Seitenzahl, I. R.; Meakin, C. A.; Lamb, D. Q.; Truran, J. W. (Physics); (Univ. of Chicago); (Max-Planck-Inst. for Astrophysics); (Univ. of Arizona)

2009-07-20T23:59:59.000Z

142

Study of the detonation phase in the gravitationally confined detonation model of type Ia supernovae.  

SciTech Connect (OSTI)

We study the initiation of the detonation in the gravitationally confined detonation (GCD) model of Type Ia supernovae (SNe Ia). In this model, ignition occurs at one or several off-center points, resulting in a burning bubble of hot ash that rises rapidly, breaks through the surface of the star, and collides at a point on the stellar surface opposite the breakout, producing a high-velocity inwardly directed flow. Initiation of the detonation occurs spontaneously in a region where the length scale of the temperature gradient extending from the flow (in which carbon burning is already occurring) into unburned fuel is commensurate to the range of critical length scales which have been derived from one-dimensional simulations that resolve the initiation of a detonation. By increasing the maximum resolution in a truncated cone that encompasses this region, beginning somewhat before initiation of the detonation occurs, we successfully simulate in situ the first gradient-initiated detonation in a whole-star simulation. The detonation emerges when a compression wave overruns a pocket of fuel situated in a Kelvin-Helmholtz cusp at the leading edge of the inwardly directed jet of burning carbon. The compression wave preconditions the temperature in the fuel in such a way that the Zeldovich gradient mechanism can operate and a detonation ensues. We explore the dependence of the length scale of the temperature gradient on spatial resolution and discuss the implications for the robustness of this detonation mechanism. We find that the time and the location at which initiation of the detonation occurs varies with resolution. In particular, initiation of a detonation had not yet occurred in our highest resolution simulation by the time we ended the simulation because of the computational demand it required. However, it may detonate later. We suggest that the turbulent shear layer surrounding the inwardly directed jet provides the most favorable physical conditions, and therefore the most likely location, for initiation of a detonation in the GCD model.

Meakin, C. A.; Seitenzahl, I.; Jordan, G. C.; Truran,, J.; Lamb, D.; Physics; Univ. of Chicago; Univ. of Arizona

2009-07-20T23:59:59.000Z

143

NUCLEOSYNTHESIS IN TWO-DIMENSIONAL DELAYED DETONATION MODELS OF TYPE Ia SUPERNOVA EXPLOSIONS  

SciTech Connect (OSTI)

For the explosion mechanism of Type Ia supernovae (SNe Ia), different scenarios have been suggested. In these, the propagation of the burning front through the exploding white dwarf (WD) star proceeds in different modes, and consequently imprints of the explosion model on the nucleosynthetic yields can be expected. The nucleosynthetic characteristics of various explosion mechanisms are explored based on three two-dimensional explosion simulations representing extreme cases: a pure turbulent deflagration, a delayed detonation following an approximately spherical ignition of the initial deflagration, and a delayed detonation arising from a highly asymmetric deflagration ignition. Apart from this initial condition, the deflagration stage is treated in a parameter-free approach. The detonation is initiated when the turbulent burning enters the distributed burning regime. This occurs at densities around 10{sup 7} g cm{sup -3}-relatively low as compared to existing nucleosynthesis studies for one-dimensional spherically symmetric models. The burning in these multidimensional models is different from that in one-dimensional simulations as the detonation wave propagates both into unburned material in the high-density region near the center of a WD and into the low-density region near the surface. Thus, the resulting yield is a mixture of different explosive burning products, from carbon-burning products at low densities to complete silicon-burning products at the highest densities, as well as electron-capture products synthesized at the deflagration stage. Detailed calculations of the nucleosynthesis in all three models are presented. In contrast to the deflagration model, the delayed detonations produce a characteristic layered structure and the yields largely satisfy constraints from Galactic chemical evolution. In the asymmetric delayed detonation model, the region filled with electron capture species (e.g., {sup 58}Ni, {sup 54}Fe) is within a shell, showing a large off-set, above the bulk of {sup 56}Ni distribution, while species produced by the detonation are distributed more spherically.

Maeda, K. [Institute for the Physics and Mathematics of the Universe (IPMU), University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583 (Japan); Roepke, F.K.; Fink, M.; Hillebrandt, W.; Travaglio, C. [Max-Planck-Institut fuer Astrophysik, Karl-Schwarzschild-Strasse 1, 85741 Garching (Germany); Thielemann, F.-K., E-mail: keiichi.maeda@ipmu.j [Department Physik, Universitaet Basel, CH-4056 Basel (Switzerland)

2010-03-20T23:59:59.000Z

144

INITIATION OF THE DETONATION IN THE GRAVITATIONALLY CONFINED DETONATION MODEL OF TYPE Ia SUPERNOVAE  

SciTech Connect (OSTI)

We study the initiation of the detonation in the gravitationally confined detonation (GCD) model of Type Ia supernovae (SNe Ia). In this model, ignition occurs at one or several off-center points, resulting in a burning bubble of hot ash that rises rapidly, breaks through the surface of the star, and collides at a point on the stellar surface opposite the breakout, producing a high-velocity inwardly directed flow. Initiation of the detonation occurs spontaneously in a region where the length scale of the temperature gradient extending from the flow (in which carbon burning is already occurring) into unburned fuel is commensurate to the range of critical length scales which have been derived from one-dimensional simulations that resolve the initiation of a detonation. By increasing the maximum resolution in a truncated cone that encompasses this region, beginning somewhat before initiation of the detonation occurs, we successfully simulate in situ the first gradient-initiated detonation in a whole-star simulation. The detonation emerges when a compression wave overruns a pocket of fuel situated in a Kelvin-Helmholtz cusp at the leading edge of the inwardly directed jet of burning carbon. The compression wave preconditions the temperature in the fuel in such a way that the Zel'dovich gradient mechanism can operate and a detonation ensues. We explore the dependence of the length scale of the temperature gradient on spatial resolution and discuss the implications for the robustness of this detonation mechanism. We find that the time and the location at which initiation of the detonation occurs varies with resolution. In particular, initiation of a detonation had not yet occurred in our highest resolution simulation by the time we ended the simulation because of the computational demand it required. However, it may detonate later. We suggest that the turbulent shear layer surrounding the inwardly directed jet provides the most favorable physical conditions, and therefore the most likely location, for initiation of a detonation in the GCD model.

Seitenzahl, Ivo R. [Department of Physics, University of Chicago, Chicago, IL 60637 (United States); Meakin, Casey A.; Truran, James W. [Joint Institute for Nuclear Astrophysics, University of Chicago, Chicago, IL 60637 (United States); Lamb, Don Q. [Center for Astrophysical Thermonuclear Flashes, University of Chicago, Chicago, IL 60637 (United States)

2009-07-20T23:59:59.000Z

145

SN 2003du: Signatures of the Circumstellar Environment in a Normal Type Ia Supernova?  

E-Print Network [OSTI]

We present observations of the Type Ia supernova 2003du and report the detectionof an unusual, high-velocity component in the Ca II infrared triplet, similar tofeatures previously observed in SN 2000cx and SN 2001el. This feature exhibits a large expansion velocity (~18,000 km/s) which is nearly constant between -7 and +2 days relative to maximum light, and disappears shortly thereafter. Otherthan this feature, the spectral evolution and light curve resemble those of a normal SN Ia. We find that the Ca II feature can plausibly be caused by a dense shell formed when circumstellar material of solar abundance is overrun by the rapidly expanding outermost layers of the SN ejecta. Model calculations show that the optical and infrared spectra are remarkably unaffected by the circumstellar interaction. In particular, no hydrogen lines are detectable in either absorption or emission. The only qualitatively different features are the strong, high-velocity feature in the Ca II IR-triplet, and a somewhat weaker O I feature near 7,300 AA. The morphology and time evolution of these features provide an estimate for the amount of accumulated matter and an indication of the mixing in the dense shell. We apply these diagnostic tools to SN 2003du and infer that about 2 x 10^{-2} M_sun of solar abundance material may have accumulated in a circumstellar shell prior to the observations. Furthermore, the early light curve data imply that the circumstellar material was originally very close to the progenitor system, perhaps from an accretion disk, Roche lobe or common envelope.

C. L. Gerardy; P. Hoeflich; R. A. Fesen; G. H. Marion; K. Nomoto; R. Quimby; B. E. Schaefer; L. Wang; J. C. Wheeler

2003-09-23T23:59:59.000Z

146

Sensitivity study of explosive nucleosynthesis in Type Ia supernovae: I. Modification of individual thermonuclear reaction rates  

E-Print Network [OSTI]

We explore the sensitivity of the nucleosynthesis due to type Ia supernovae with respect to uncertainties in nuclear reaction rates. We have adopted a standard one-dimensional delayed detonation model of the explosion of a Chandrasekhar-mass white dwarf, and have post-processed the thermodynamic trajectories of every mass-shell with a nucleosynthetic code, with increases (decreases) by a factor of ten on the rates of 1196 nuclear reactions. We have computed as well hydrodynamic models for different rates of the fusion reactions of 12C and of 16O. For selected reactions, we have recomputed the nucleosynthesis with alternative prescriptions for their rates taken from the JINA REACLIB database, and have analyzed the temperature ranges where modifications of their rates have the strongest effect on nucleosynthesis. The nucleosynthesis resulting from the Type Ia supernova models is quite robust with respect to variations of nuclear reaction rates, with the exception of the reaction of fusion of 12C nuclei. The energy of the explosion changes by less than \\sim4%. The changes in the nucleosynthesis due to the modification of the rates of fusion reactions are as well quite modest, for instance no species with a mass fraction larger than 0.02 experiences a variation of its yield larger than a factor of two. We provide the sensitivity of the yields of the most abundant species with respect to the rates of the most intense reactions with protons, neutrons, and alphas. In general, the yields of Fe-group nuclei are more robust than the yields of intermediate-mass elements. Among the charged particle reactions, the most influential on supernova nucleosynthesis are 30Si + p \\rightleftarrows 31P + {\\gamma}, 20Ne + {\\alpha} \\rightleftarrows 24Mg + {\\gamma}, and 24Mg + {\\alpha} \\rightleftarrows 27Al + p. The temperatures at which a modification of their rate has a larger impact are in the range 2 < T < 4 GK. (abridged)

Eduardo Bravo; Gabriel Martnez-Pinedo

2012-04-09T23:59:59.000Z

147

Incompatibility of a comoving Ly-alpha forest with supernova-Ia luminosity distances  

E-Print Network [OSTI]

Recently Perlmutter et al. suggested a positive value of Einstein's cosmological constant Lambda on the basis of luminosity distances from type-Ia supernovae. However, Lambda world models had earlier been proposed by Hoell & Priester and Liebscher et al. on the basis of quasar absorption-line data. Employing more general repulsive fluids ("dark energy") encompassing the Lambda component we quantitatively compare both approaches with each other. Fitting the SN-data by a minimum-component model consisting of dark energy + dust yields a closed universe with a large amount of dust exceeding the baryonic content constrained by big-bang nucleosynthesis. The nature of the dark energy is hardly constrained. Only when enforcing a flat universe there is a clear tendency to a dark-energy Lambda fluid and the `canonical' value Omega_M = 0.3 for dust. Conversely, fitting the quasar-data by a minimum-component model yields a sharply defined, slightly closed model with a low dust density ruling out significant pressureless dark matter. The dark-energy component obtains an equation-of-state P = -0.96 epsilon close to that of a Lambda-fluid. Omega_M = 0.3 or a precisely flat spatial geometry are inconsistent with minimum-component models. It is found that quasar and supernova data sets cannot be reconciled with each other via (repulsive ideal fluid+dust+radiation)-world models. Compatibility could be reached by drastic expansion of the parameter space with at least two exotic fluids added to dust and radiation as world constituents. If considering such solutions as far-fetched one has to conclude that the quasar absorption line and the SN-Ia constraints are incompatible.

Jens Thomas; Hartmut Schulz

2001-03-18T23:59:59.000Z

148

HELIUM-IGNITED VIOLENT MERGERS AS A UNIFIED MODEL FOR NORMAL AND RAPIDLY DECLINING TYPE Ia SUPERNOVAE  

SciTech Connect (OSTI)

The progenitors of Type Ia supernovae (SNe Ia) are still unknown, despite significant progress during the past several years in theory and observations. Violent mergers of two carbon-oxygen (CO) white dwarfs (WDs) are a candidate scenario suggested to be responsible for at least a significant fraction of normal SNe Ia. Here, we simulate the merger of two CO WDs using a moving-mesh code that allows for the inclusion of thin helium (He) shells (0.01 M{sub Sun }) on top of the WDs at an unprecedented numerical resolution. The accretion of He onto the primary WD leads to the formation of a detonation in its He shell. This detonation propagates around the CO WD and sends a converging shock wave into its core, known to robustly trigger a second detonation, as in the well-known double-detonation scenario for He-accreting CO WDs. However, in contrast to that scenario where a massive He shell is required to form a detonation through thermal instability, here the He detonation is ignited dynamically. Accordingly the required He-shell mass is significantly smaller, and hence its burning products are unlikely to affect the optical display of the explosion. We show that this scenario, which works for CO primary WDs with CO- as well as He-WD companions, has the potential to explain the different brightness distributions, delay times, and relative rates of normal and fast declining SNe Ia. Finally, we discuss extensions to our unified merger model needed to obtain a comprehensive picture of the full observed diversity of SNe Ia.

Pakmor, R.; Springel, V. [Heidelberger Institut fuer Theoretische Studien, Schloss-Wolfsbrunnenweg 35, D-69118 Heidelberg (Germany); Kromer, M. [Kavli Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwa, Chiba 277-8583 (Japan); Taubenberger, S. [Max-Planck-Institut fuer Astrophysik, Karl-Schwarzschild-Str. 1, D-85748 Garching (Germany)

2013-06-10T23:59:59.000Z

149

New Hubble Space Telescope Discoveries of Type Ia Supernovae at z > 1: Narrowing Constraints on the Early Behavior of Dark Energy  

E-Print Network [OSTI]

We have discovered 21 new Type Ia supernovae (SNe Ia) with the Hubble Space Telescope (HST) and have used them to trace the history of cosmic expansion over the last 10 billion years. These objects, which include 13 spectroscopically confirmed SNe Ia at z > 1, were discovered during 14 epochs of reimaging of the GOODS fields North and South over two years with the Advanced Camera for Surveys on HST. Together with a recalibration of our previous HST-discovered SNe Ia, the full sample of 23 SNe Ia at z > 1 provides the highest-redshift sample known. Combined with previous SN Ia datasets, we measured H(z) at discrete, uncorrelated epochs, reducing the uncertainty of H(z>1) from 50% to under 20%, strengthening the evidence for a cosmic jerk--the transition from deceleration in the past to acceleration in the present. The unique leverage of the HST high-redshift SNe Ia provides the first meaningful constraint on the dark energy equation-of-state parameter at z >1. The result remains consistent with a cosmological constant (w(z)=-1), and rules out rapidly evolving dark energy (dw/dz >>1). The defining property of dark energy, its negative pressure, appears to be present at z>1, in the epoch preceding acceleration, with ~98% confidence in our primary fit. Moreover, the z>1 sample-averaged spectral energy distribution is consistent with that of the typical SN Ia over the last 10 Gyr, indicating that any spectral evolution of the properties of SNe Ia with redshift is still below our detection threshold.

Adam G. Riess; Louis-Gregory Strolger; Stefano Casertano; Henry C. Ferguson; Bahram Mobasher; Ben Gold; Peter J. Challis; Alexei V. Filippenko; Saurabh Jha; Weidong Li; John Tonry; Ryan Foley; Robert P. Kirshner; Mark Dickinson; Emily MacDonald; Daniel Eisenstein; Mario Livio; Josh Younger; Chun Xu; Tomas Dahlen; Daniel Stern

2006-11-17T23:59:59.000Z

150

CP Tech Center I Iowa State University I 2711 S. Loop Dr. Suite 4700,Ames, IA 50010-8664 I 515-294-5798 FOR MORE INFORMATION  

E-Print Network [OSTI]

CP Tech Center I Iowa State University I 2711 S. Loop Dr. Suite 4700,Ames, IA 50010-8664 I 515 calcium sulfate in the form of hemihydrate (plaster) in the cement (false set) or the uncontrolled early

151

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E-Print Network [OSTI]

PieeFi5e Hinea tiTiUation. I.R. de Farias JR., M. ?hao, and H. ?hao. State University of New York at jumalo. {defariasy m|haoy |hon??ia}@??ffalo.ed?.

152

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Office of Legacy Management (LM)

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153

Direct numerical simulations of type Ia supernovae flames I: The landau-darrieus instability  

SciTech Connect (OSTI)

Planar flames are intrinsically unstable in open domains due to the thermal expansion across the burning front--the Landau-Darrieus instability. This instability leads to wrinkling and growth of the flame surface, and corresponding acceleration of the flame, until it is stabilized by cusp formation. We look at the Landau-Darrieus in stability for C/O thermonuclear flames at conditions relevant to the late stages of a Type Ia supernova explosion. Two-dimensional direct numerical simulations of both single-mode and multi-mode perturbations using a low Mach number hydrodynamics code are presented. We show the effect of the instability on the flame speed as a function of both the density and domain size, demonstrate the existence of the small scale cutoff to the growth of the instability, and look for the proposed breakdown of the non-linear stabilization at low densities. The effects of curvature on the flame as quantified through measurements of the growth rate and computation of the corresponding Markstein number. While accelerations of a few percent are observed, they are too small to have any direct outcome on the supernova explosion.

Bell, J.B.; Day, M.S.; Rendleman, C.A.; Woosley, S.E.; Zingale, M.

2003-11-24T23:59:59.000Z

154

Thermonuclear .Ia Supernovae from Helium Shell Detonations: Explosion Models and Observables  

Science Journals Connector (OSTI)

During the early evolution of an AM Canum Venaticorum system, helium is accreted onto the surface of a white dwarf under conditions suitable for unstable thermonuclear ignition. The turbulent motions induced by the convective burning phase in the He envelope become strong enough to influence the propagation of burning fronts and may result in the onset of a detonation. Such an outcome would yield radioactive isotopes and a faint rapidly rising thermonuclear ".Ia" supernova. In this paper, we present hydrodynamic explosion models and observable outcomes of these He shell detonations for a range of initial core and envelope masses. The peak UVOIR bolometric luminosities range by a factor of 10 (from 5 ? 1041 to 5 ? 1042 erg s1), and the R-band peak varies from M R,peak = 15 to 18. The rise times in all bands are very rapid (40Ca through 56Ni) and unburnt He. Thus, the spectra around peak light lack signs of intermediate-mass elements and are dominated by CaII and TiII features, with the caveat that our radiative transfer code does not include the nonthermal effects necessary to produce He features.

Ken J. Shen; Dan Kasen; Nevin N. Weinberg; Lars Bildsten; Evan Scannapieco

2010-01-01T23:59:59.000Z

155

Comparison of the Legacy and Gold SnIa Dataset Constraints on Dark Energy Models  

E-Print Network [OSTI]

We have performed a comparative analysis of three recent and reliable SnIa datasets available in the literature: the Full Gold (FG) dataset (157 data points $0dataset (140 data points $0dataset (115 data points $0datasets are consistent with each other at the 95% confidence level, the latest (SNLS) dataset shows distinct trends which are not shared by the Gold datasets. We find that the best fit dynamical $w(z)$ obtained from the SNLS dataset does not cross the PDL $w=-1$ and remains above and close to the $w=-1$ line for the whole redshift range $0datasets (FG and TG) clearly crosses the PDL and departs significantly from the PDL $w=-1$ line while the LCDM parameter values are about $2\\sigma$ away from the best fit $w(z)$. In addition, the $(\\Omega_{0m},\\Omega_\\Lambda)$ parameters in a LCDM parametrization without a flat prior, fit by the SNLS dataset, favor the minimal flat LCDM concordance model. The corresponding fit with the Gold datasets mildly favors a closed universe and the flat LCDM parameter values are $1\\sigma - 2\\sigma$ away from the best fit $(\\Omega_{0m},\\Omega_\\Lambda)$.

S. Nesseris; L. Perivolaropoulos

2005-12-02T23:59:59.000Z

156

Phenomenology for Supernova Ia Data Based on a New Cosmic Time  

E-Print Network [OSTI]

A new phenomenological theory for the expansion of our universe is presented. Because fundamental supporting theory is still in development, its discussion is not presented in this paper. The theory is based on a new algebraic expression for cosmic time G Rho t^2=3/32Pi, which correctly predicts the WMAP measured cosmological constants and the fundamental Hubble parameter H(t) for the expansion of the universe. A replacement for dark matter, called here "dark mass", is proposed which scales as with the expansion and incorporated. It does not react with ordinary matter, except gravitationally, and produces flat rotational curves for spiral galaxies. Also a new expression for the approaching velocity of radiation in a closed 3-sphere expanding universe is given that accounts for the early degrading negative approach of radiation for z > 1.7. The expression is v = Hr-c. Combining these three elements produces a luminosity distance dL that successfully predicts the apparent magnitude of exploding supernova Ia stars and even the new gamma ray bursts with no need for dark energy or acceleration of the expansion of the universe.

Charles B. Leffert

2007-07-26T23:59:59.000Z

157

Evaluating Systematic Dependencies of Type Ia Supernovae: The Influence of Deflagration to Detonation Density  

E-Print Network [OSTI]

We explore the effects of the deflagration to detonation transition (DDT) density on the production of Ni-56 in thermonuclear supernova explosions (type Ia supernovae). Within the DDT paradigm, the transition density sets the amount of expansion during the deflagration phase of the explosion and therefore the amount of nuclear statistical equilibrium (NSE) material produced. We employ a theoretical framework for a well-controlled statistical study of two-dimensional simulations of thermonuclear supernovae with randomized initial conditions that can, with a particular choice of transition density, produce a similar average and range of Ni-56 masses to those inferred from observations. Within this framework, we utilize a more realistic "simmered" white dwarf progenitor model with a flame model and energetics scheme to calculate the amount of Ni-56 and NSE material synthesized for a suite of simulated explosions in which the transition density is varied in the range 1-3x10^7 g/cc. We find a quadratic dependence ...

Jackson, Aaron P; Townsley, Dean M; Chamulak, David A; Brown, Edward F; Timmes, F X

2010-01-01T23:59:59.000Z

158

A Test of Tully-Fisher Distance Estimates Using Cepheids and Type Ia Supernovae  

E-Print Network [OSTI]

We update and extend the results of Shanks (1997, MNRAS, 290, L77) by making a direct test of Tully-Fisher distance estimates to thirteen spiral galaxies with HST Cepheid distances and to ten spiral galaxies with Type Ia supernova (SNIa) distances. The results show that the Tully-Fisher distance moduli are too short with respect to the Cepheid distances by 0.46+-0.11mag and too short with respect to the SNIa distances by 0.49+-0.18mag. Combining the HST Cepheid and the best SNIa data suggests that, overall, previous Tully-Fisher distances at v~1000 kms-1 were too short by 0.43+-0.09mag, a result which is significant at the 4.6 sigma level. These data therefore indicate that previous Tully-Fisher distances should be revised upwards by 22+-5% implying, for example, a Virgo distance of 19.0+-1.8Mpc. The value of Ho from Tully-Fisher estimates is correspondingly revised downwards from Ho=84+-10kms-1Mpc-1 to Ho=69+-8kms-1Mpc-1. There is evidence that the Tully-Fisher relation at large distances is affected by Malmquist bias. In this case, we argue that Ho<50kms-1Mpc-1 cannot be ruled out by Tully-Fisher considerations.

T. Shanks

1999-01-24T23:59:59.000Z

159

Parametrizing the transition to the phantom epoch with Supernovae Ia and Standard Rulers  

E-Print Network [OSTI]

The reconstruction of a (non)canonical scalar field Lagrangian from the dark energy Equation of State (EoS) parameter is studied, where it is shown that any EoS parametrization can be well reconstructed in terms of scalar fields. Several examples of EoS parameters are studied and the particular scalar field Lagrangian is reconstructed. Then, we propose some new parametrizations that may present a (fast) transition to a phantom dark energy EoS (where $w_{DE}dark energy EoS are studied by using supernovae Ia data (HST Cluster Supernova Survey) combined with Standard Ruler datasets [Cosmic Microwave Background (CMB) and Baryon Acoustic Oscillations (BAO)] and its comparison with the $\\Lambda$CDM model is analyzed. Then, the best fit of the models is obtained, which provides some information about whether a phantom transition may be supported by the observations. In this regard, the crossing of the phantom barrier is allowed statistically but the occurrence of a future singularity seems unlikely.

Iker Leanizbarrutia; Diego Sez-Gmez

2014-04-14T23:59:59.000Z

160

A POSSIBLE EVOLUTIONARY SCENARIO OF HIGHLY MAGNETIZED SUPER-CHANDRASEKHAR WHITE DWARFS: PROGENITORS OF PECULIAR TYPE Ia SUPERNOVAE  

SciTech Connect (OSTI)

Several recently discovered peculiar Type Ia supernovae seem to demand an altogether new formation theory that might help explain the puzzling dissimilarities between them and the standard Type Ia supernovae. The most striking aspect of the observational analysis is the necessity of invoking super-Chandrasekhar white dwarfs having masses {approx}2.1-2.8 M{sub Sun }, M{sub Sun} being the mass of Sun, as their most probable progenitors. Strongly magnetized white dwarfs having super-Chandrasekhar masses have already been established as potential candidates for the progenitors of peculiar Type Ia supernovae. Owing to the Landau quantization of the underlying electron degenerate gas, theoretical results yielded the observationally inferred mass range. Here, we sketch a possible evolutionary scenario by which super-Chandrasekhar white dwarfs could be formed by accretion on to a commonly observed magnetized white dwarf, invoking the phenomenon of flux freezing. This opens multiple possible evolution scenarios ending in supernova explosions of super-Chandrasekhar white dwarfs having masses within the range stated above. We point out that our proposal has observational support, such as the recent discovery of a large number of magnetized white dwarfs by the Sloan Digital Sky Survey.

Das, Upasana; Mukhopadhyay, Banibrata [Department of Physics, Indian Institute of Science, Bangalore 560012 (India); Rao, A. R., E-mail: upasana@physics.iisc.ernet.in, E-mail: bm@physics.iisc.ernet.in, E-mail: arrao@tifr.res.in [Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Mumbai 400005 (India)

2013-04-10T23:59:59.000Z

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161

Type Ia Supernovae with Bi-Modal Explosions Are Common -- Possible Smoking Gun for Direct Collisions of White-Dwarfs  

E-Print Network [OSTI]

We discover clear doubly-peaked line profiles in 3 out of ~20 type Ia supernovae (SNe Ia) with high-quality nebular-phase spectra. The profiles are consistently present in three well-separated Co/Fe emission features. The two peaks are respectively blue-shifted and red-shifted relative to the host galaxies and are separated by ~5000 km/s. The doubly-peaked profiles directly reflect a bi-modal velocity distribution of the radioactive Ni56 in the ejecta that powers the emission of these SNe. Due to their random orientations, only a fraction of SNe with intrinsically bi-modal velocity distributions will appear as doubly-peaked spectra. Therefore SNe with intrinsic bi-modality are likely common, especially among the SNe in the low-luminosity (~40% of all SNe Ia) part on the Philips relation \\Delta m15(B) >~ 1.3. Bi-modality is naturally expected from direct collisions of white dwarfs (WDs) due to the detonation of both WDs and is demonstrated in a 3D 0.64 M_Sun-0.64 M_Sun WD collision simulation.

Dong, Subo; Kushnir, Doron; Prieto, Jose L

2014-01-01T23:59:59.000Z

162

Three-Dimensional Simulations of the Deflagration Phase of the Gravitationally Confined Detonation Model of Type Ia Supernovae  

E-Print Network [OSTI]

We report the results of a series of three-dimensional (3-D) simulations of the deflagration phase of the gravitationally confined detonation mechanism for Type Ia supernovae. In this mechanism, ignition occurs at one or several off-center points, resulting in a burning bubble of hot ash that rises rapidly, breaks through the surface of the star, and collides at a point opposite breakout on the stellar surface. We find that detonation conditions are robustly reached in our 3-D simulations for a range of initial conditions and resolutions. Detonation conditions are achieved as the result of an inwardly-directed jet that is produced by the compression of unburnt surface material when the surface flow collides with itself. A high-velocity outwardly-directed jet is also produced. The initial conditions explored in this paper lead to conditions at detonation that can be expected to produce large amounts of $^{56}$Ni and small amounts of intermediate mass elements. These particular simulations are therefore relevant only to high luminosity Type Ia supernovae. Recent observations of Type Ia supernovae imply a compositional structure that is qualitatively consistent with that expected from these simulations.

G C Jordan IV; R T Fisher; D M Townsley; A C Calder; C Graziani; S Asida; D Q Lamb; J W Truran

2007-03-21T23:59:59.000Z

163

The Joint Efficient Dark-energy Investigation (JEDI): Measuring the cosmic expansion history from type Ia supernovae  

E-Print Network [OSTI]

JEDI (Joint Efficient Dark-energy Investigation) is a candidate implementation of the NASA-DOE Joint Dark Energy Mission (JDEM). JEDI will probe dark energy in three independent methods: (1) type Ia supernovae, (2) baryon acoustic oscillations, and (3) weak gravitational lensing. In an accompanying paper, an overall summary of the JEDI mission is given. In this paper, we present further details of the supernova component of JEDI. To derive model-independent constraints on dark energy, it is important to precisely measure the cosmic expansion history, H(z), in continuous redshift bins from z \\~ 0-2 (the redshift range in which dark energy is important). SNe Ia at z > 1 are not readily accessible from the ground because the bulk of their light has shifted into the near-infrared where the sky background is overwhelming; hence a space mission is required to probe dark energy using SNe. Because of its unique near-infrared wavelength coverage (0.8-4.2 microns), JEDI has the advantage of observing SNe Ia in the rest frame J band for the entire redshift range of 0 energy are discussed, with special emphasis on the improved precision afforded by the rest frame near-infrared data.

M. M. Phillips; Peter Garnavich; Yun Wang; David Branch; Edward Baron; Arlin Crotts; J. Craig Wheeler; Edward Cheng; Mario Hamuy; for the JEDI Team

2006-06-28T23:59:59.000Z

164

Constraining the dark energy and smoothness parameter with typeIa supernovae and gamma-ray bursts  

Science Journals Connector (OSTI)

The existence of inhomogeneities in the observed Universe modifies the distance-redshift relations thereby affecting the results of cosmological tests in comparison to the ones derived assuming spatially uniform models. By modeling the inhomogeneities through a Zeldovich-Kantowski-Dyer-Roeder approach which is phenomenologically characterized by a smoothness parameter ?, we rediscuss the constraints on the cosmic parameters based on typeIa supernovae (SNeIa) and gamma-ray bursts (GRBs) data. The present analysis is restricted to a flat ?CDM model with the reasonable assumption that ? does not clump. A ?2 analysis using 557 SNeIa data from the Union2 compilation data (R. Amanullah et al., Astrophys. J. 716, 712 (2010).) constrains the pair of parameters (?m, ?) to ?m=0.27-0.03+0.08 (2?) and ??0.25. A similar analysis based only on 59 Hymnium GRBs (H. Wei, J. Cosmol. Astropart. Phys. 08 (2010) 020.) constrains the matter density parameter to be ?m=0.35-0.24+0.62 (2?) while all values for the smoothness parameter are allowed. By performing a joint analysis, it is found that ?m=0.27-0.03+0.06 and ??0.52. As a general result, although considering that current GRB data alone cannot constrain the smoothness ? parameter, our analysis provides an interesting cosmological probe for dark energy even in the presence of inhomogeneities.

V. C. Busti; R. C. Santos; J. A. S. Lima

2012-05-07T23:59:59.000Z

165

THE HUBBLE SPACE TELESCOPE CLUSTER SUPERNOVA SURVEY. III. CORRELATED PROPERTIES OF TYPE Ia SUPERNOVAE AND THEIR HOSTS AT 0.9 < z < 1.46  

SciTech Connect (OSTI)

Using the sample of Type Ia supernovae (SNe Ia) discovered by the Hubble Space Telescope (HST) Cluster Supernova Survey and augmented with HST-observed SNe Ia in the Great Observatories Origins Deep Survey (GOODS) fields, we search for correlations between the properties of SNe and their host galaxies at high redshift. We use galaxy color and quantitative morphology to determine the red sequence in 25 clusters and develop a model to distinguish passively evolving early-type galaxies from star-forming galaxies in both clusters and the field. With this approach, we identify 6 SN Ia hosts that are early-type cluster members and 11 SN Ia hosts that are early-type field galaxies. We confirm for the first time at z > 0.9 that SNe Ia hosted by early-type galaxies brighten and fade more quickly than SNe Ia hosted by late-type galaxies. We also show that the two samples of hosts produce SNe Ia with similar color distributions. The relatively simple spectral energy distributions expected for passive galaxies enable us to measure stellar masses of early-type SN hosts. In combination with stellar mass estimates of late-type GOODS SN hosts from Thomson and Chary, we investigate the correlation of host mass with Hubble residual observed at lower redshifts. Although the sample is small and the uncertainties are large, a hint of this relation is found at z > 0.9. By simultaneously fitting the average cluster galaxy formation history and dust content to the red-sequence scatters, we show that the reddening of early-type cluster SN hosts is likely E(B - V) {approx}< 0.06. The similarity of the field and cluster early-type host samples suggests that field early-type galaxies that lie on the red sequence may also be minimally affected by dust. Hence, the early-type-hosted SNe Ia studied here occupy a more favorable environment to use as well-characterized high-redshift standard candles than other SNe Ia.

Meyers, J.; Barbary, K.; Fakhouri, H. K.; Goldhaber, G. [Department of Physics, University of California Berkeley, Berkeley, CA 94720 (United States); Aldering, G.; Faccioli, L.; Hsiao, E. [E.O. Lawrence Berkeley National Lab, 1 Cyclotron Rd., Berkeley, CA 94720 (United States); Barrientos, L. F. [Departmento de Astronomia, Pontificia Universidad Catolica de Chile, Santiago (Chile); Brodwin, M. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Dawson, K. S. [Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112 (United States); Deustua, S.; Fruchter, A. S. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Doi, M.; Ihara, Y. [Institute of Astronomy, Graduate School of Science, University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo 181-0015 (Japan); Eisenhardt, P. [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States); Gilbank, D. G. [Department of Physics and Astronomy, University Of Waterloo, Waterloo, Ontario, N2L 3G1 (Canada); Gladders, M. D. [Department of Astronomy and Astrophysics, University of Chicago, Chicago, IL 60637 (United States); Gonzalez, A. H. [Department of Astronomy, University of Florida, Gainesville, FL 32611 (United States); Hattori, T. [Subaru Telescope, National Astronomical Observatory of Japan, 650 North Aohaku Place, Hilo, HI 96720 (United States); Kashikawa, N., E-mail: jmeyers314@berkeley.edu [National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 (Japan); Collaboration: Supernova Cosmology Project; and others

2012-05-01T23:59:59.000Z

166

PULSATING REVERSE DETONATION MODELS OF TYPE Ia SUPERNOVAE. I. DETONATION IGNITION  

SciTech Connect (OSTI)

Observational evidences point to a common explosion mechanism of Type Ia supernovae based on a delayed detonation of a white dwarf (WD). Although several scenarios have been proposed and explored by means of one, two, and three-dimensional simulations, the key point still is the understanding of the conditions under which a stable detonation can form in a destabilized WD. One of the possibilities that have been invoked is that an inefficient deflagration leads to the pulsation of a Chandrasekhar-mass WD, followed by formation of an accretion shock around a carbon-oxygen rich core. The accretion shock confines the core and transforms kinetic energy from the collapsing halo into thermal energy of the core, until an inward moving detonation is formed. This chain of events has been termed Pulsating Reverse Detonation (PRD). In this work we explore the robustness of the detonation ignition for different PRD models characterized by the amount of mass burned during the deflagration phase, M {sub defl}. The evolution of the WD up to the formation of the accretion shock has been followed with a three-dimensional hydrodynamical code with nuclear reactions turned off. We found that detonation conditions are achieved for a wide range of M {sub defl}. However, if the nuclear energy released during the deflagration phase is close to the WD binding energy ({approx}0.46 x 10{sup 51} erg {yields} M {sub defl} {approx} 0.30 M {sub sun}) the accretion shock cannot heat and confine the core efficiently and detonation conditions are not robustly achieved.

Bravo, Eduardo; GarcIa-Senz, Domingo [Department de FIsica i Enginyeria Nuclear, Universitat Politecnica de Catalunya, Diagonal 647, 08028 Barcelona (Spain)], E-mail: eduardo.bravo@upc.edu, E-mail: domingo.garcia@upc.edu

2009-04-20T23:59:59.000Z

167

The effect of turbulent intermittency on the deflagration to detonation transition in SN Ia explosions  

E-Print Network [OSTI]

We examine the effects of turbulent intermittency on the deflagration to detonation transition (DDT) in Type Ia supernovae. The Zel'dovich mechanism for DDT requires the formation of a nearly isothermal region of mixed ash and fuel that is larger than a critical size. We primarily consider the hypothesis by Khokhlov et al. and Niemeyer and Woosley that the nearly isothermal, mixed region is produced when the flame makes the transition to the distributed regime. We use two models for the distribution of the turbulent velocity fluctuations to estimate the probability as a function of the density in the exploding white dwarf that a given region of critical size is in the distributed regime due to strong local turbulent stretching of the flame structure. We also estimate lower limits on the number of such regions as a function of density. We find that the distributed regime, and hence perhaps DDT, occurs in a local region of critical size at a density at least a factor of 2-3 larger than predicted for mean conditions that neglect intermittency. This factor brings the transition density to be much larger than the empirical value from observations in most situations. We also consider the intermittency effect on the more stringent conditions for DDT by Lisewski et al. and Woosley. We find that a turbulent velocity of $10^8$ cm/s in a region of size $10^6$ cm, required by Lisewski et al., is rare. We expect that intermittency gives a weaker effect on the Woosley model with stronger criterion. The predicted transition density from this criterion remains below $10^7$ g/cm$^3$ after accounting for intermittency using our intermittency models.

Liubin Pan; J. Craig Wheeler; John Scalo

2008-03-12T23:59:59.000Z

168

THE DETONATION MECHANISM OF THE PULSATIONALLY ASSISTED GRAVITATIONALLY CONFINED DETONATION MODEL OF Type Ia SUPERNOVAE  

SciTech Connect (OSTI)

We describe the detonation mechanism composing the 'pulsationally assisted' gravitationally confined detonation (GCD) model of Type Ia supernovae. This model is analogous to the previous GCD model reported in Jordan et al.; however, the chosen initial conditions produce a substantively different detonation mechanism, resulting from a larger energy release during the deflagration phase. The resulting final kinetic energy and {sup 56}Ni yields conform better to observational values than is the case for the 'classical' GCD models. In the present class of models, the ignition of a deflagration phase leads to a rising, burning plume of ash. The ash breaks out of the surface of the white dwarf, flows laterally around the star, and converges on the collision region at the antipodal point from where it broke out. The amount of energy released during the deflagration phase is enough to cause the star to rapidly expand, so that when the ash reaches the antipodal point, the surface density is too low to initiate a detonation. Instead, as the ash flows into the collision region (while mixing with surface fuel), the star reaches its maximally expanded state and then contracts. The stellar contraction acts to increase the density of the star, including the density in the collision region. This both raises the temperature and density of the fuel-ash mixture in the collision region and ultimately leads to thermodynamic conditions that are necessary for the Zel'dovich gradient mechanism to produce a detonation. We demonstrate feasibility of this scenario with three three-dimensional (3D), full star simulations of this model using the FLASH code. We characterized the simulations by the energy released during the deflagration phase, which ranged from 38% to 78% of the white dwarf's binding energy. We show that the necessary conditions for detonation are achieved in all three of the models.

Jordan, G. C. IV; Graziani, C.; Weide, K.; Norris, J.; Hudson, R.; Lamb, D. Q. [Flash Center for Computational Science, University of Chicago, Chicago, IL 60637 (United States); Fisher, R. T. [Department of Physics, University of Massachusetts Dartmouth, 285 Old Westport Road, North Dartmouth, MA 02740 (United States); Townsley, D. M. [Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487 (United States); Meakin, C. [Steward Observatory, University of Arizona, Tucson, AZ 85721 (United States); Reid, L. B. [NTEC Environmental Technology, Subiaco WA 6008 (Australia)

2012-11-01T23:59:59.000Z

169

Off-center ignition in type Ia supernova: I. Initial evolution and implications for delayed detonation  

E-Print Network [OSTI]

The explosion of a carbon-oxygen white dwarf as a Type Ia supernova is known to be sensitive to the manner in which the burning is ignited. Studies of the pre-supernova evolution suggest asymmetric, off-center ignition, and here we explore its consequences in two- and three-dimensional simulations. Compared with centrally ignited models, one-sided ignitions initially burn less and release less energy. For the distributions of ignition points studied, ignition within two hemispheres typically leads to the unbinding of the white dwarf, while ignition within a small fraction of one hemisphere does not. We also examine the spreading of the blast over the surface of the white dwarf that occurs as the first plumes of burning erupt from the star. In particular, our studies test whether the collision of strong compressional waves can trigger a detonation on the far side of the star as has been suggested by Plewa et al. (2004). The maximum temperature reached in these collisions is sensitive to how much burning and expansion has already gone on, and to the dimensionality of the calculation. Though detonations are sometimes observed in 2D models, none ever happens in the corresponding 3D calculations. Collisions between the expansion fronts of multiple bubbles also seem, in the usual case, unable to ignite a detonation. "Gravitationally confined detonation" is therefore not a robust mechanism for the explosion. Detonation may still be possible in these models however, either following a pulsation or by spontaneous detonation if the turbulent energy is high enough.

F. K. Roepke; S. E. Woosley; W. Hillebrandt

2006-09-04T23:59:59.000Z

170

A Three-Dimensional Picture of the Delayed-Detonation Model of Type Ia Supernovae  

E-Print Network [OSTI]

Deflagration models poorly explain the observed diversity of SNIa. Current multidimensional simulations of SNIa predict a significant amount of, so far unobserved, carbon and oxygen moving at low velocities. It has been proposed that these drawbacks can be resolved if there is a sudden jump to a detonation (delayed detonation), but this kind of models has been explored mainly in one dimension. Here we present new three-dimensional delayed detonation models in which the deflagraton-to-detonation transition (DDT) takes place in conditions like those favored by one-dimensional models. We have used a SPH code adapted to SNIa with algorithms devised to handle subsonic as well as supersonic combustion fronts. The starting point was a C-O white dwarf of 1.38 solar masses. When the average density on the flame surface reached 2-3x10^7 g/cm^3 a detonation was launched. The detonation wave processed more than 0.3 solar masses of carbon and oxygen, emptying the central regions of the ejecta of unburned fuel and raising its kinetic energy close to the fiducial 10^51 ergs expected from a healthy Type Ia supernova. The final amount of 56Ni synthesized also was in the correct range. However, the mass of carbon and oxygen ejected is still too high. The three-dimensional delayed detonation models explored here show an improvement over pure deflagration models, but they still fail to coincide with basic observational constraints. However, there are many aspects of the model that are still poorly known (geometry of flame ignition, mechanism of DDT, properties of detonation waves traversing a mixture of fuel and ashes). Therefore, it will be worth pursuing its exploration to see if a good SNIa model based on the three-dimensional delayed detonation scenario can be obtained.

Eduardo Bravo; Domingo Garcia-Senz

2007-12-04T23:59:59.000Z

171

Timescale stretch parameterization of Type Ia supernova B-band light curves  

SciTech Connect (OSTI)

R-band intensity measurements along the light curve of Type Ia supernovae discovered by the Cosmology Project (SCP) are fitted in brightness to templates allowing a free parameter the time-axis width factor w identically equal to s times (1+z). The data points are then individually aligned in the time-axis, normalized and K-corrected back to the rest frame, after which the nearly 1300 normalized intensity measurements are found to lie on a well-determined common rest-frame B-band curve which we call the ''composite curve.'' The same procedure is applied to 18 low-redshift Calan/Tololo SNe with Z < 0.11; these nearly 300 B-band photometry points are found to lie on the composite curve equally well. The SCP search technique produces several measurements before maximum light for each supernova. We demonstrate that the linear stretch factor, s, which parameterizes the light-curve timescale appears independent of z, and applies equally well to the declining and rising parts of the light curve. In fact, the B band template that best fits this composite curve fits the individual supernova photometry data when stretched by a factor s with chi 2/DoF {approx} 1, thus as well as any parameterization can, given the current data sets. The measurement of the data of explosion, however, is model dependent and not tightly constrained by the current data. We also demonstrate the 1 + z light-cure time-axis broadening expected from cosmological expansion. This argues strongly against alternative explanations, such as tired light, for the redshift of distant objects.

Goldhaber, G.; Groom, D.E.; Kim, A.; Aldering, G.; Astier, P.; Conley, A.; Deustua, S.E.; Ellis, R.; Fabbro, S.; Fruchter, A.S.; Goobar, A.; Hook, I.; Irwin, M.; Kim, M.; Knop, R.A.; Lidman, C.; McMahon, R.; Nugent, P.E.; Pain, R.; Panagia, N.; Pennypacker, C.R.; Perlmutter, S.; Ruiz-Lapuente, P.; Schaefer, B.; Walton, N.A.; York, T.

2001-04-01T23:59:59.000Z

172

Exploring Cosmological Expansion Parametrizations with the Gold SnIa Dataset  

E-Print Network [OSTI]

We use the SnIa Gold dataset to compare LCDM with 10 representative parametrizations of the recent Hubble expansion history $H(z)$. For the comparison we use two statistical tests; the usual $\\chi_{min}^2$ which is insensitive to the parametrization number of parameters, and a statistic we call the p-test which depends on both the value of $\\chi_{min}^2$ and the number $n$ of the parametrization parameters. The p-test measures the confidence level to which the parameter values corresponding to LCDM are excluded from the viewpoint of the parametrization tested. For example, for a linear equation of state parametrization $w(z)=w_0 + w_1 z$ the LCDM parameter values ($w_0=-1$, $w_1=0$) are excluded at 75% confidence level. We use a flat prior and $\\Omega_{0m}=0.3$. All parametrizations tested are consistent with the Gold dataset at their best fit. According to both statistical tests, the worst fits among the 10 parametrizations, correspond to the Chaplygin gas, the brane world and the Cardassian parametrizations. The best fit is achieved by oscillating parametrizations which can exclude the parameter values corresponding to LCDM at 85% confidence level. Even though this level of significance does not provide a statistically significant exclusion of LCDM (it is less than $2\\sigma$) and does not by itself constitute conclusive evidence for oscillations in the cosmological expansion, when combined with similar independent recent evidence for oscillations coming from the CMB and matter power spectra it becomes an issue worth of further investigation.

R. Lazkoz; S. Nesseris; L. Perivolaropoulos

2005-11-10T23:59:59.000Z

173

Table 2 -Lime use and practices on Corn, major producing states, 2001 CO GA IL IN IA KS KY MI MN MO NE NY NC ND OH PA SD TX WI Area  

E-Print Network [OSTI]

Table 2 - Lime use and practices on Corn, major producing states, 2001 CO GA IL IN IA KS KY MI MN.7 Table 2 - Lime use and practices on Corn, major producing states, 2000 CO IL IN IA KS KY MI MN MO NE NY use and practices on Corn, major producing states, 1999 CO IL IN IA KS KY MI MN MO NE NC OH SD TX WI

Kammen, Daniel M.

174

Fisica Geral IA (2010/1) Nome 1 2 3 R1 R2 R3 Media Conc  

E-Print Network [OSTI]

Fisica Geral IA (2010/1) Nome 1 2 3 R1 R2 R3 M´edia Conc 1 ANDERSON SILVEIRA SALDANHA 0.5 5.2 4.7 0.7 3.5 4.5 1.5 - - 3.57 D M´edia 2.60 4.64 5.93 5.54 6.08 8.37 4.60 #12;20 40 60 80 100 A B C D FF 23

Stariolo, Daniel Adrián

175

First detection of $^{56}$Co gamma-ray lines from type Ia supernova (SN2014J) with INTEGRAL  

E-Print Network [OSTI]

We report the first ever detection of $^{56}$Co lines at 847 and 1237 keV and a continuum in the 200-400 keV band from the Type Ia supernova SN2014J in M82 with INTEGRAL observatory. The data were taken between 50th and 100th day since the SN2014J outburst. The line fluxes suggest that $0.62\\pm0.13~M\\odot$ of radioactive $^{56}$Ni were synthesized during the explosion. Line broadening gives a characteristic ejecta expansion velocity $V_e\\sim 2100\\pm 500~{\\rm km~s^{-1}}$. The flux at lower energies (200-400 keV) flux is consistent with the three-photon positronium annihilation, Compton downscattering and absorption in the $\\sim~1.4~M\\odot$ ejecta composed from equal fractions of iron-group and intermediate-mass elements and a kinetic energy $E_k\\sim 1.4~10^{51}~{\\rm erg}$. All these parameters are in broad agreement with a "canonical" model of an explosion of a Chandrasekhar-mass White Dwarf (WD), providing an unambiguous proof of the nature of Type Ia supernovae as a thermonuclear explosion of a solar mass co...

Churazov, E; Isern, J; Kndlseder, J; Jean, P; Lebrun, F; Chugai, N; Grebenev, S; Bravo, E; Sazonov, S; Renaud, M

2014-01-01T23:59:59.000Z

176

Chasing the phantom: A closer look at type Ia supernovae and the dark energy equation of state  

Science Journals Connector (OSTI)

Some recent observations provide >2? evidence for phantom dark energya value of the dark energy equation of state less than the cosmological-constant value of ?1. We focus on constraining the equation of state by combining current data from the most mature geometrical probes of dark energy: type Ia supernovae (SNe Ia) from the Supernova Legacy Survey (SNLS3), the Supernova Cosmology Project (Union2.1), and the Pan-STARRS1 survey (PS1); cosmic microwave background measurements from Planck and WMAP9; and a combination of measurements of baryon acoustic oscillations. The combined data are consistent with w=?1 for the Union2.1 sample, though they present moderate (?1.9?) evidence for a phantom value when either the SNLS3 or PS1 sample is used instead. We study the dependence of the constraints on the redshift, stretch, color, and host galaxy stellar mass of SNe, but we find no unusual trends. In contrast, the constraints strongly depend on any external H0 prior: a higher adopted value for the direct measurement of the Hubble constant (H0?71??km/s/Mpc) leads to ?2? evidence for phantom dark energy. Given Planck data, we can therefore make the following statement at 2? confidence: either the SNLS3 and PS1 data have systematics that remain unaccounted for or the Hubble constant is below 71??km/s/Mpc; else the dark energy equation of state is indeed phantom.

Daniel L. Shafer and Dragan Huterer

2014-03-06T23:59:59.000Z

177

Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution  

E-Print Network [OSTI]

We have discovered 16 Type Ia supernovae (SNe Ia) with the Hubble Space Telescope (HST) and have used them to provide the first conclusive evidence for cosmic deceleration that preceded the current epoch of cosmic acceleration. These objects, discovered during the course of the GOODS ACS Treasury program, include 6 of the 7 highest-redshift SNe Ia known, all at z>1.25, and populate the Hubble diagram in unexplored territory. The luminosity distances to these and 170 previous SNe Ia are provided. A purely kinematic interpretation of the SN Ia sample provides evidence at the > 99% confidence level for a transition from deceleration to acceleration or similarly, strong evidence for a cosmic jerk. Using a simple model of the expansion history, the transition between the two epochs is constrained to be at z=0.46 +/- 0.13. The data are consistent with the cosmic concordance model of Omega_M ~ 0.3, Omega_Lambda~0.7 (chi^2_dof=1.06), and are inconsistent with a simple model of evolution or dust as an alternative to dark energy. For a flat Universe with a cosmological constant. When combined with external flat-Universe constraints we find w=-1.02 + 0.13 - 0.19 (and $dark energy, P = w\\rho c^2. Joint constraints on both the recent equation of state of dark energy, $w_0$, and its time evolution, dw/dz, are a factor of ~8 more precise than its first estimate and twice as precise as those without the SNe Ia discovered with HST. Our constraints are consistent with the static nature of and value of w expected for a cosmological constant (i.e., w_0 = -1.0, dw/dz = 0), and are inconsistent with very rapid evolution of dark energy. We address consequences of evolving dark energy for the fate of the Universe.

Adam G. Riess; Louis-Gregory Strolger; John Tonry; Stefano Casertano; Henry C. Ferguson; Bahram Mobasher; Peter Challis; Alexei V. Filippenko; Saurabh Jha; Weidong Li; Ryan Chornock; Robert P. Kirshner; Bruno Leibundgut; Mark Dickinson; Mario Livio; Mauro Giavalisco; Charles C. Steidel; Narciso Benitez; Zlatan Tsvetanov

2004-02-23T23:59:59.000Z

178

Failed-detonation Supernovae: Subluminous Low-velocity Ia Supernovae and their Kicked Remnant White Dwarfs with Iron-rich Cores  

Science Journals Connector (OSTI)

Type Ia supernovae (SNe Ia) originate from the thermonuclear explosions of carbon-oxygen (C-O) white dwarfs (WDs). The single-degenerate scenario is a well-explored model of SNe Ia where unstable thermonuclear burning initiates in an accreting, Chandrasekhar-mass WD and forms an advancing flame. By several proposed physical processes, the rising, burning material triggers a detonation, which subsequently consumes and unbinds the WD. However, if a detonation is not triggered and the deflagration is too weak to unbind the star, a completely different scenario unfolds. We explore the failure of the gravitationally confined detonation mechanism of SNe Ia, and demonstrate through two-dimensional and three-dimensional simulations the properties of failed-detonation SNe. We show that failed-detonation SNe expel a few 0.1 M ? of burned and partially burned material and that a fraction of the material falls back onto the WD, polluting the remnant WD with intermediate-mass and iron-group elements that likely segregate to the core forming a WD whose core is iron rich. The remaining material is asymmetrically ejected at velocities comparable to the escape velocity from the WD, and in response, the WD is kicked to velocities of a few hundred km s1. These kicks may unbind the binary and eject a runaway/hypervelocity WD. Although the energy and ejected mass of the failed-detonation SN are a fraction of typical thermonuclear SNe, they are likely to appear as subluminous low-velocity SNe Ia. Such failed detonations might therefore explain or are related to the observed branch of peculiar SNe Ia, such as the family of low-velocity subluminous SNe (SN 2002cx/SN 2008ha-like SNe).

George C. Jordan, IV; Hagai B. Perets; Robert T. Fisher; Daniel R. van Rossum

2012-01-01T23:59:59.000Z

179

FAILED-DETONATION SUPERNOVAE: SUBLUMINOUS LOW-VELOCITY Ia SUPERNOVAE AND THEIR KICKED REMNANT WHITE DWARFS WITH IRON-RICH CORES  

SciTech Connect (OSTI)

Type Ia supernovae (SNe Ia) originate from the thermonuclear explosions of carbon-oxygen (C-O) white dwarfs (WDs). The single-degenerate scenario is a well-explored model of SNe Ia where unstable thermonuclear burning initiates in an accreting, Chandrasekhar-mass WD and forms an advancing flame. By several proposed physical processes, the rising, burning material triggers a detonation, which subsequently consumes and unbinds the WD. However, if a detonation is not triggered and the deflagration is too weak to unbind the star, a completely different scenario unfolds. We explore the failure of the gravitationally confined detonation mechanism of SNe Ia, and demonstrate through two-dimensional and three-dimensional simulations the properties of failed-detonation SNe. We show that failed-detonation SNe expel a few 0.1 M{sub Sun} of burned and partially burned material and that a fraction of the material falls back onto the WD, polluting the remnant WD with intermediate-mass and iron-group elements that likely segregate to the core forming a WD whose core is iron rich. The remaining material is asymmetrically ejected at velocities comparable to the escape velocity from the WD, and in response, the WD is kicked to velocities of a few hundred km s{sup -1}. These kicks may unbind the binary and eject a runaway/hypervelocity WD. Although the energy and ejected mass of the failed-detonation SN are a fraction of typical thermonuclear SNe, they are likely to appear as subluminous low-velocity SNe Ia. Such failed detonations might therefore explain or are related to the observed branch of peculiar SNe Ia, such as the family of low-velocity subluminous SNe (SN 2002cx/SN 2008ha-like SNe).

Jordan, George C. IV; Van Rossum, Daniel R. [Center for Astrophysical Thermonuclear Flashes, University of Chicago, Chicago, IL 60637 (United States); Perets, Hagai B. [Physics Department, Technion, Israel Institute of Technology, Haifa 32000 (Israel); Fisher, Robert T. [Department of Physics, University of Massachusetts Dartmouth, 285 Old Westport Road, North Dartmouth, MA 02740 (United States)

2012-12-20T23:59:59.000Z

180

He H`ike no ka Ho`opihapiha `ia o ka Pepa Noi Komo no ka Papahana Ho`omkaukau Kumu `iwi `o Kahuawaiola  

E-Print Network [OSTI]

45 a `oi ma ka pae 300 a ma luna a`e paha a e k ana n koina `lelo a mo`omeheu Hawai`i e helu `ia nei`omeheu Hawai`i. 7. ka puka `ana ma ho`okahi o n papa penei: HWST 205, 471, 472, 473, 474; a i `ole ka `ae a ka `ekolu kau kona l`ihi i kkulu `ia no ka ho`omkaukau `ana i n kumu Mauli Ola Hawai`i no ka ho`ona`auao ma

Wiegner, Tracy N.

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181

Testing Models of Intrinsic Brightness Variations in Type Ia Supernovae, and their Impact on Measuring Cosmological Parameters  

E-Print Network [OSTI]

For spectroscopically confirmed type Ia supernovae we evaluate models of intrinsic brightness variations with detailed data/Monte-Carlo comparisons of the dispersion in the following quantities: Hubble-diagram scatter, color difference (B-V-c) between the true B-V color and the fitted color (c) from the SALT-II light curve model, and photometric redshift residual. The data sample includes 251 ugriz light curves from the 3-season Sloan Digital Sky Survey-II, and 191 griz light curves from the Supernova Legacy Survey 3-year data release. We find that the simplest model of a wavelength independent (coherent) scatter is not adequate, and that to describe the data the intrinsic scatter model must have wavelength-dependent variations. We use Monte Carlo simulations to examine the standard approach of adding a coherent scatter term in quadrature to the distance-modulus uncertainty in order to bring the reduced chi2 to unity when fitting a Hubble diagram. If the light curve fits include model uncertainties with the c...

Kessler, Richard; Marriner, John; Betoule, Marc; Brinkmann, Jon; Cinabro, David; El-Hage, Patrick; Frieman, Joshua; Jha, Saurabh; Mosher, Jennifer; Schneider, Donald P

2012-01-01T23:59:59.000Z

182

THE EFFECT OF THE PRE-DETONATION STELLAR INTERNAL VELOCITY PROFILE ON THE NUCLEOSYNTHETIC YIELDS IN TYPE Ia SUPERNOVA  

SciTech Connect (OSTI)

A common model of the explosion mechanism of Type Ia supernovae is based on a delayed detonation of a white dwarf. A variety of models differ primarily in the method by which the deflagration leads to a detonation. A common feature of the models, however, is that all of them involve the propagation of the detonation through a white dwarf that is either expanding or contracting, where the stellar internal velocity profile depends on both time and space. In this work, we investigate the effects of the pre-detonation stellar internal velocity profile and the post-detonation velocity of expansion on the production of {alpha}-particle nuclei, including {sup 56}Ni, which are the primary nuclei produced by the detonation wave. We perform one-dimensional hydrodynamic simulations of the explosion phase of the white dwarf for center and off-center detonations with five different stellar velocity profiles at the onset of the detonation. In order to follow the complex flows and to calculate the nucleosynthetic yields, approximately 10,000 tracer particles were added to every simulation. We observe two distinct post-detonation expansion phases: rarefaction and bulk expansion. Almost all the burning to {sup 56}Ni occurs only in the rarefaction phase, and its expansion timescale is influenced by pre-existing flow structure in the star, in particular by the pre-detonation stellar velocity profile. We find that the mass fractions of the {alpha}-particle nuclei, including {sup 56}Ni, are tight functions of the empirical physical parameter {rho}{sub up}/v{sub down}, where {rho}{sub up} is the mass density immediately upstream of the detonation wave front and v{sub down} is the velocity of the flow immediately downstream of the detonation wave front. We also find that v{sub down} depends on the pre-detonation flow velocity. We conclude that the properties of the pre-existing flow, in particular the internal stellar velocity profile, influence the final isotopic composition of burned matter produced by the detonation.

Kim, Yeunjin; Jordan, G. C. IV; Graziani, Carlo; Lamb, D. Q.; Truran, J. W. [Astronomy Department, University of Chicago, Chicago, IL 60637 (United States); Meyer, B. S. [Physics and Astronomy Department, Clemson University, Clemson, SC 29634 (United States)

2013-07-01T23:59:59.000Z

183

Neutron Diffraction Residual Strain Tensor Measurements Within The Phase IA Weld Mock-up Plate P-5  

SciTech Connect (OSTI)

Oak Ridge National Laboratory (ORNL) has worked with NRC and EPRI to apply neutron and X-ray diffraction methods to characterize the residual stresses in a number of dissimilar metal weld mockups and samples. The design of the Phase IA specimens aimed to enable stress measurements by several methods and computational modeling of the weld residual stresses. The partial groove in the 304L stainless steel plate was filled with weld beads of Alloy 82. A summary of the weld conditions for each plate is provided in Table 1. The plates were constrained along the long edges during and after welding by bolts with spring-loaded washers attached to the 1-inch thick Al backing plate. The purpose was to avoid stress relief due to bending of the welded stainless steel plate. The neutron diffraction method was one of the methods selected by EPRI for non-destructive through thickness strain and stress measurement. Four different plates (P-3 to P-6) were studied by neutron diffraction strain mapping, representing four different welding conditions. Through thickness neutron diffraction strain mappings at NRSF2 for the four plates and associated strain-free d-zero specimens involved measurement along seven lines across the weld and at six to seven depths. The mountings of each plate for neutron diffraction measurements were such that the diffraction vector was parallel to each of the three primary orthogonal directions of the plate: two in-plane directions, longitudinal and transverse, and the direction normal to the plate (shown in left figure within Table 1). From the three orthogonal strains for each location, the residual stresses along the three plate directions were calculated. The principal axes of the strain and stress tensors, however, need not necessarily align with the plate coordinate system. To explore this, plate P-5 was selected for examination of the possibility that the principal axes of strain are not along the sample coordinate system axes. If adequate data could be collected the goal would be to determine the strain tensor's orientation and magnitude of strain along each principle axis direction.

Hubbard, Camden R [ORNL

2011-09-01T23:59:59.000Z

184

TESTING MODELS OF INTRINSIC BRIGHTNESS VARIATIONS IN TYPE Ia SUPERNOVAE AND THEIR IMPACT ON MEASURING COSMOLOGICAL PARAMETERS  

SciTech Connect (OSTI)

For spectroscopically confirmed Type Ia supernovae we evaluate models of intrinsic brightness variations with detailed data/Monte Carlo comparisons of the dispersion in the following quantities: Hubble-diagram scatter, color difference (B - V - c) between the true B - V color and the fitted color (c) from the SALT-II light curve model, and photometric redshift residual. The data sample includes 251 ugriz light curves from the three-season Sloan Digital Sky Survey-II and 191 griz light curves from the Supernova Legacy Survey 3 year data release. We find that the simplest model of a wavelength-independent (coherent) scatter is not adequate, and that to describe the data the intrinsic-scatter model must have wavelength-dependent variations resulting in a {approx}0.02 mag scatter in B - V - c. Relatively weak constraints are obtained on the nature of intrinsic scatter because a variety of different models can reasonably describe this photometric data sample. We use Monte Carlo simulations to examine the standard approach of adding a coherent-scatter term in quadrature to the distance-modulus uncertainty in order to bring the reduced {chi}{sup 2} to unity when fitting a Hubble diagram. If the light curve fits include model uncertainties with the correct wavelength dependence of the scatter, we find that this approach is valid and that the bias on the dark energy equation-of-state parameter w is much smaller ({approx}0.001) than current systematic uncertainties. However, incorrect model uncertainties can lead to a significant bias on the distance moduli, with up to {approx}0.05 mag redshift-dependent variation. This bias is roughly reduced in half after applying a Malmquist bias correction. For the recent SNLS3 cosmology results, we estimate that this effect introduces an additional systematic uncertainty on w of {approx}0.02, well below the total uncertainty. This uncertainty depends on the choice of viable scatter models and the choice of supernova (SN) samples, and thus this small w-uncertainty is not guaranteed in future cosmology results. For example, the w-uncertainty for SDSS+SNLS (dropping the nearby SNe) increases to {approx}0.04.

Kessler, Richard; Frieman, Joshua A. [Department of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637 (United States)] [Department of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637 (United States); Guy, Julien; Betoule, Marc; El-Hage, Patrick [Laboratoire de Physique Nucleaire et des Hautes Energies, UPMC Univ. Paris 6, UPD Univ. Paris 7, CNRS IN2P3, 4 place Jussieu, F-75005 Paris (France)] [Laboratoire de Physique Nucleaire et des Hautes Energies, UPMC Univ. Paris 6, UPD Univ. Paris 7, CNRS IN2P3, 4 place Jussieu, F-75005 Paris (France); Marriner, John [Center for Particle Astrophysics, Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510 (United States)] [Center for Particle Astrophysics, Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510 (United States); Brinkmann, Jon [Apache Point Observatory, P.O. Box 59, Sunspot, NM 88349 (United States)] [Apache Point Observatory, P.O. Box 59, Sunspot, NM 88349 (United States); Cinabro, David [Department of Physics, Wayne State University, Detroit, MI 48202 (United States)] [Department of Physics, Wayne State University, Detroit, MI 48202 (United States); Jha, Saurabh [Department of Physics and Astronomy, Rutgers University, 136 Frelinghuysen Road, Piscataway, NJ 08854 (United States)] [Department of Physics and Astronomy, Rutgers University, 136 Frelinghuysen Road, Piscataway, NJ 08854 (United States); Mosher, Jennifer [Department of Physics and Astronomy, University of Pennsylvania, 203 South 33rd Street, Philadelphia, PA 19104 (United States)] [Department of Physics and Astronomy, University of Pennsylvania, 203 South 33rd Street, Philadelphia, PA 19104 (United States); Schneider, Donald P., E-mail: kessler@kicp.uchicago.edu [Department of Astronomy and Astrophysics, The Pennsylvania State University, University Park, PA 16802 (United States)

2013-02-10T23:59:59.000Z

185

Gorchakova-IA  

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

Mokhov Oboukhov Institute of Atmospheric Physics Russian Academy of Sciences Moscow, Russia T. B. Zhuravleva Institute of Atmospheric Optics Tomsk, Russia Introduction Study of...

186

Variations ia Variscan Granites  

Science Journals Connector (OSTI)

... the compositional variations within the Caledonian belt, may both be attributed to variations in the geothermal gradient. In Nature Physical Science this week (April 2), he takes these studies ... studies a stage further by showing that the correlation within the belt between composition and geothermal gradient also applies to the Variscan granites.

1973-04-06T23:59:59.000Z

187

IA News Archive  

Office of Environmental Management (EM)

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U.S. Secretary of Energy Ernest Moniz traveled...

188

Competition between $\\beta$-delayed proton and $\\beta$-delayed $\\gamma$ decay of the exotic $T_z$ = -2 nucleus $^{56}$Zn and fragmentation of the IAS  

E-Print Network [OSTI]

A very exotic decay mode at the proton drip-line, $\\beta$-delayed $\\gamma$-proton decay, has been observed in the $\\beta$ decay of the $T_z$ = -2 nucleus $^{56}$Zn. Three $\\gamma$-proton sequences have been observed following the $\\beta$ decay. The fragmentation of the IAS in $^{56}$Cu has also been observed for the first time. The results were reported in a recent publication. At the time of publication the authors were puzzled by the competition between proton and $\\gamma$ decays from the main component of the IAS. Here we outline a possible explanation based on the nuclear structure properties of the three nuclei involved, namely $^{56}$Zn, $^{56}$Cu and $^{55}$Ni, close to the doubly magic nucleus $^{56}$Ni. From the fragmentation of the Fermi strength and the excitation energy of the two populated 0$^{+}$ states we could deduce the off-diagonal matrix element of the charge-dependent part of the Hamiltonian responsible for the mixing. These results are compared with the decay of $^{55}$Cu with one proton ...

Rubio, B; Fujita, Y; Blank, B; Gelletly, W; Agramunt, J; Algora, A; Ascher, P; Bilgier, B; Cceres, L; Cakirli, R B; Fujita, H; Ganioglu, E; Gerbaux, M; Giovinazzo, J; Grvy, S; Kamalou, O; Kozer, H C; Kucuk, L; Kurtukian-Nieto, T; Molina, F; Popescu, L; Rogers, A M; Susoy, G; Stodel, C; Suzuki, T; Tamii, A; Thomas, J C

2015-01-01T23:59:59.000Z

189

Expectations for the Hard X-ray Continuum and Gamma-ray Line Fluxes from the Type Ia supernova SN 2014J in M82  

E-Print Network [OSTI]

The hard X-ray continuum and gamma-ray lines from a Type Ia supernova dominate its integrated photon emissions and can provide unique diagnostics of the mass of the ejecta, the $^{56}$Ni yield and spatial distribution, its kinetic energy and expansion speed, and the mechanism of explosion. Such signatures and their time behavior "X-ray" the bulk debris field in direct fashion, and do not depend upon the oftimes problematic and elaborate UV, optical, and near-infrared spectroscopy and radiative transfer that have informed the study of these events for decades. However, to date no hard photons have ever been detected from a Type Ia supernova in explosion. With the advent of the supernova SN 2014J in M82, at a distance of $\\sim$3.5 Mpc, this situation may soon change. Both NuSTAR and INTEGRAL have the potential to detect SN 2014J, and, if spectra and light curves can be measured, would usefully constrain the various explosion models published during the last $\\sim$thirty years. In support of these observational ...

The, Lih-Sin

2014-01-01T23:59:59.000Z

190

RELATIVISTIC SHOCK BREAKOUTS-A VARIETY OF GAMMA-RAY FLARES: FROM LOW-LUMINOSITY GAMMA-RAY BURSTS TO TYPE Ia SUPERNOVAE  

SciTech Connect (OSTI)

The light from a shock breakout of stellar explosions, which carries a wealth of information, strongly depends on the shock velocity at the time of the breakout. The emission from Newtonian breakouts, typical in regular core-collapse supernovae (SNe), has been explored extensively. However, a large variety of explosions result in mildly or ultrarelativistic breakouts, where the observed signature is unknown. Here we calculate the luminosity and spectrum produced by relativistic breakouts. In order to do so, we improve the analytic description of relativistic radiation-mediated shocks and follow the system from the breakout itself, through the planar phase and into the spherical phase. We limit our calculation to cases where the post-breakout acceleration of the gas ends during the planar phase (i.e., the final gas Lorentz factor {approx}< 30). We find that spherical relativistic breakouts produce a flash of gamma rays with energy, E{sub bo}, temperature, T{sub bo}, and duration, t{sup obs} b{sub o}, that provide the breakout radius ( Almost-Equal-To 5 R{sub Sun }(t{sup obs}{sub bo}/10 s)(T{sub bo}/50 keV){sup 2}) and the Lorentz factor ( Almost-Equal-To T{sub bo}/50 keV). They also always satisfy a relativistic breakout relation (t{sup obs}{sub bo}/20 s) {approx} (E{sub bo}/10{sup 46} erg){sup 1/2}(T{sub bo}/50 keV){sup -2.68}. The breakout flare is typically followed, on longer timescales, by X-rays that carry a comparable energy. We apply our model to a variety of explosions, including Type Ia and .Ia SNe, accretion-induced collapse, energetic SNe, and gamma-ray bursts (GRBs). We find that all these events produce detectable gamma-ray signals, some of which may have already been seen. Some particular examples are: (1) relativistic shock breakouts provide a natural explanation to the energy, temperature, and timescales of low-luminosity GRBs. Indeed, all observed low-luminosity GRBs satisfy the relativistic breakout relation. (2) Nearby broad-line Type Ib/c (like SN 2002ap) may produce a detectable {gamma}-ray signal. (3) Galactic Type Ia SNe may produce detectable {gamma}-ray flares. We conclude that relativistic shock breakouts provide a generic process for the production of gamma-ray flares.

Nakar, Ehud [Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978 (Israel); Sari, Re'em [Racah Institute for Physics, Hebrew University, Jerusalem 91904 (Israel)

2012-03-10T23:59:59.000Z

191

Solar Wind: Manifestations of Solar Activity E N CYC LO PE D IA O F AS T R O N O MY AN D AS T R O PHYS I C S Solar Wind: Manifestations of Solar  

E-Print Network [OSTI]

Solar Wind: Manifestations of Solar Activity E N CYC LO PE D IA O F AS T R O N O MY AN D AS T R O PHYS I C S Solar Wind: Manifestations of Solar Activity The Sun's outer atmosphere, the corona, is continually heated and expands to create the solar wind. Solar activity waxes and wanes with the 11 yr cycle

Webb, David F.

192

Projected rotational velocities of WD1614+136 and WD1353+409 - implications for the rate of galactic Type Ia supernovae  

E-Print Network [OSTI]

The white dwarf stars WD1614+136 and WD1353+409 are not sufficiently massive to have formed through single star evolution. However, observations to date have not yet found any evidence for binarity. It has therefore been suggested that these stars are the result of a merger. In this paper we place an upper limit of approximately 50kms on the projected rotational velocities of both stars. This suggests that, if these stars are the results of a merger, efficient angular momentum loss with accompanying mass loss must have occurred. If the same process occurs following the merging of more massive white dwarf stars, the predicted rate of Type Ia supernovae due to merging white dwarfs may have been greatly over-estimated. Further observations to determine binarity in WD1614+136 and WD1353+409 are therefore encouraged.

P. F. L. Maxted; T. R. Marsh

1998-03-17T23:59:59.000Z

193

Chandra Observation of the Cluster of Galaxies MS 0839.9+2938 at z=0.194: the Central Excess Iron and SN Ia Enrichment  

E-Print Network [OSTI]

We present the Chandra study of the intermediately distant cluster of galaxies MS 0839.9+2938. By performing both the projected and deprojected spectral analyses, we find that the gas temperature is approximately constant at about 4 keV in 130-444h_70^-1 kpc. In the inner regions, the gas temperature descends towards the center, reaching sun yr^-1 and 96-126 M_sun yr^-1, respectively within 74h_70^-1 kpc where the gas is significantly colder. Along with the temperature drop, we detect a significant inward iron abundance increase from about 0.4 solar in the outer regions to about 1 solar within the central 37h_70^-1 kpc. Thus MS 0839.9+2938 is the cluster showing the most significant central iron excess at z>~ 0.2. We argue that most of the excess iron should have been contributed by SNe Ia. By utilizing the observed SN Ia rate and stellar mass loss rate, we estimate that the time needed to enrich the central region with excess iron is 6.4-7.9 Gyr, which is similar to those found for the nearby clusters. Coinciding with the optical extension of the cD galaxy (up to about 30h_70^-1 kpc), the observed X-ray surface brightness profile exhibits an excess beyond the distribution expected by either the beta model or the NFW model, and can be well fitted with an empirical two-beta model that leads to a relatively flatter mass profile in the innermost region.

Yu Wang; Haiguang Xu; Zhongli Zhang; Yueheng Xu; Xiang-Ping Wu; Sui-Jian Xue; Zongwei Li

2005-06-12T23:59:59.000Z

194

Multi-Megawatt Organic Rankine Engine power plant (MORE). Phase IA final report: system design of MORE power plant for industrial energy conservation emphasizing the cement industry  

SciTech Connect (OSTI)

The Multi-Megawatt Organic Rankine Engine (MORE) program is directed towards the development of a large, organic Rankine power plant for energy conservation from moderate temperature industrial heat streams. Organic Rankine power plants are ideally suited for use with heat sources in the temperature range below 1100/sup 0/F. Cement manufacture was selected as the prototype industry for the MORE system because of the range of parameters which can be tested in a cement application. This includes process exit temperatures of 650/sup 0/F to 1110/sup 0/F for suspension preheater and long dry kilns, severe dust loading, multi-megawatt power generation potential, and boiler exhaust gas acid dew point variations. The work performed during the Phase IA System Design contract period is described. The System Design task defines the complete MORE system and its installation to the level necessary to obtain detailed performance maps, equipment specifications, planning of supporting experiments, and credible construction and hardware cost estimates. The MORE power plant design is based upon installation in the Black Mountain Quarry Cement Plant near Victorville, California.

Bair, E.K.; Breindel, B.; Collamore, F.N.; Hodgson, J.N.; Olson, G.K.

1980-01-31T23:59:59.000Z

195

Consolidative Involved-Node Proton Therapy for Stage IA-IIIB Mediastinal Hodgkin Lymphoma: Preliminary Dosimetric Outcomes From a Phase II Study  

SciTech Connect (OSTI)

Purpose: To compare the dose reduction to organs at risk (OARs) with proton therapy (PT) versus three-dimensional conformal radiotherapy (3D-CRT) and intensity-modulated radiotherapy (IMRT) in patients with mediastinal Hodgkin lymphoma (HL) enrolled on a Phase II study of involved-node radiotherapy (INRT). Methods and Materials: Between June 2009 and October 2010, 10 patients were enrolled on a University of Florida institutional review board-approved protocol for de novo 'classical' Stage IA-IIIB HL with mediastinal (bulky or nonbulky) involvement after chemotherapy. INRT was planned per European Organization for Research and Treatment of Cancer guidelines. Three separate optimized plans were developed for each patient: 3D-CRT, IMRT, and PT. The primary end point was a 50% reduction in the body V4 with PT compared with 3D-CRT or IMRT. Results: The median relative reduction with PT in the primary end point, body V4, was 51% compared with 3D-CRT (p = 0.0098) and 59% compared with IMRT (p = 0.0020), thus all patients were offered treatment with PT. PT provided the lowest mean dose to the heart, lungs, and breasts for all 10 patients compared with either 3D-CRT or IMRT. The median difference in the OAR mean dose reduction with PT compared with 3D-CRT were 10.4 Gy/CGE for heart; 5.5 Gy/CGE for lung; 0.9 Gy/CGE for breast; 8.3 Gy/CGE for esophagus; and 4.1 Gy/CGE for thyroid. The median differences for mean OAR dose reduction for PT compared with IMRT were 4.3 Gy/CGE for heart, 3.1 Gy/CGE for lung, 1.4 Gy/CGE for breast, 2.8 Gy/CGE for esophagus, and 2.7 Gy/CGE for thyroid. Conclusions: All 10 patients benefitted from dose reductions to OARs with PT compared with either 3D-CRT or IMRT. It is anticipated that these reductions in dose to OAR will translate into lower rates of late complications, but long-term follow-up on this Phase II INRT study is needed.

Hoppe, Bradford S., E-mail: bhoppe@floridaproton.org [University of Florida Proton Therapy Institute, Jacksonville, FL (United States); Flampouri, Stella; Su Zhong; Morris, Christopher G. [University of Florida Proton Therapy Institute, Jacksonville, FL (United States); Latif, Naeem [University of Florida Hematology/Oncology, Jacksonville, FL (United States); Dang, Nam H.; Lynch, James [University of Florida Hematology/Oncology, Gainesville, FL (United States); Li Zuofeng; Mendenhall, Nancy P. [University of Florida Proton Therapy Institute, Jacksonville, FL (United States)

2012-05-01T23:59:59.000Z

196

IA_50m_Wind  

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

Metadata also available as Metadata: IdentificationInformation DataQualityInformation SpatialDataOrganizationInformation SpatialReferenceInformation EntityandAttributeI...

197

+ . -. . -. . .__ .. .. -..---. ---.. . --. --. -. L IA Science Service Feature  

E-Print Network [OSTI]

, "the bent'' - i.e.9 ''Also it is P l * t l Y the A l l The thermometer reading alone merely tella us with heat vhen the thermometer the temperature of the air to be far below freezing. In Arizona people mny

198

Lawrence Livermore National Laboratory  

Broader source: Energy.gov [DOE]

Lawrence Livermore National Laboratorys (LLNL) primary mission is research and development in support of national security.

199

"Report Date","U.S.",,,"PADD I",,,"PADD IA",,,"PADD IB",,,"PADD IC",,,"PADD II"  

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

Residential Heating Oil Prices (Before and After Change in Aggregation Methodology)" Residential Heating Oil Prices (Before and After Change in Aggregation Methodology)" "Report Date","U.S.",,,"PADD I",,,"PADD IA",,,"PADD IB",,,"PADD IC",,,"PADD II" ,"Old Reported Value ($ per Gallon)","New Revised Value ($ per Gallon)","Difference","Old Reported Value ($ per Gallon)","New Revised Value ($ per Gallon)","Difference","Old Reported Value ($ per Gallon)","New Revised Value ($ per Gallon)","Difference","Old Reported Value ($ per Gallon)","New Revised Value ($ per Gallon)","Difference","Old Reported Value ($ per Gallon)","New Revised Value ($ per Gallon)","Difference","Old Reported Value ($ per Gallon)","New Revised Value ($ per Gallon)","Difference"

200

Lawrence Livermore National Laboratory - Reports  

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

Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory Review Reports 2013 Independent Oversight Review of the Fire Protection Program at Lawrence Livermore National Laboratory, September 2013 Independent Oversight Review of Preparedness for Severe Natural Phenomena Events at the Lawrence Livermore National Laboratory, July 2013 Activity Reports 2013 Lawrence Livermore National Laboratory Operational Drill at the B332 Plutonium Facility, February 2013 Activity Reports 2012 Lawrence Livermore National Laboratory Site Lead Planning Activities, October 2012 Review Reports 2011 Review of Integrated Safety Management System Effectiveness at the Livermore Site Office, October 2011 Review of Integrated Safety Management System Effectiveness at Lawrence Livermore National Laboratory, September 2011

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201

LVOC - Livermore Valley Open Campus  

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

LVOC - Livermore Valley Open Campus LVOC - Livermore Valley Open Campus ↓ Case Studies | ↓ About LVOC Get to market faster Making the impossible possible Lawrence Livermore and Sandia National Laboratories are home to some of the world's most unique state-of-the art facilities and resources. For decades, we have been using our combined capabilities, including a workforce of over 7000 employees to solve complex problems for the nation. Visit the science and technology epicenter - the Livermore Valley Open Campus - just east of San Francisco in the Tri-Valley's innovation ecosystem to find out what problems we can solve for you. LVOC Flyer We Keep Industry on the Cutting Edge of Innovative Technology About the Livermore Valley Open Campus LVOC Rendering Open for Business: The Livermore Valley Open Campus is located at the

202

Lawrence Livermore National Laboratory  

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

March/April 2008 March/April 2008 4 Lawrence Livermore National Laboratory Extending the Search for Extending the Search for A new imager will allow astrophysicists to study the atmospheres of distant planets. T HE discovery of other solar systems beyond ours has been the stuff of science fiction for decades. Great excitement greeted the positive identification of the first planet outside our solar system in 1995. Since then, scientists have identified approximately 250 extrasolar planets (exoplanets), but they have had no way to study the majority of these planets or their

203

Lawrence Livermore National Laboratory Awards  

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

Lawrence Livermore National Laboratory Awards The Laboratory bestows awards to outstanding scientists and engineers from among its workforce and for exceptionally qualified...

204

LIVERMORE SITE OFFICE CONTRACT MANAGEMENT PLAN For LAWRENCE LIVERMORE NATIONAL  

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

LIVERMORE SITE OFFICE CONTRACT MANAGEMENT PLAN For LAWRENCE LIVERMORE NATIONAL LABORATORY CONTRACT NO. DE-AC52-07NA27344 LSO_CMP_6-10-088 i CONTENTS Contents 1. INTRODUCTION.............................................................................................................. 3 2. PURPOSE .......................................................................................................................... 3 2.2 Maintenance and Distribution ......................................................................................... 4 3. CONTRACT SUMMARY AND PRINCIPAL FEATURES............................................. 4 3.1 Contract Summary ...........................................................................................................

205

IA Blog Archive | Department of Energy  

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

materials used in four clean energy technologies: wind turbines, electric vehicles, solar cells and energy-efficient lighting. October 1, 2010 Secretary Chu and John Berry...

206

Surface detonation in type Ia supernova explosions?  

E-Print Network [OSTI]

We explore the evolution of thermonuclear supernova explosions when the progenitor white dwarf star ignites asymmetrically off-center. Several numerical simulations are carried out in two and three dimensions to test the consequences of different initial flame configurations such as spherical bubbles displaced from the center, more complex deformed configurations, and teardrop-shaped ignitions. The burning bubbles float towards the surface while releasing energy due to the nuclear reactions. If the energy release is too small to gravitationally unbind the star, the ash sweeps around it, once the burning bubble approaches the surface. Collisions in the fuel on the opposite side increase its temperature and density and may -- in some cases -- initiate a detonation wave which will then propagate inward burning the core of the star and leading to a strong explosion. However, for initial setups in two dimensions that seem realistic from pre-ignition evolution, as well as for all three-dimensional simulations the collimation of the surface material is found to be too weak to trigger a detonation.

F. K. Roepke; S. E. Woosley

2006-09-25T23:59:59.000Z

207

IA News Archive | Department of Energy  

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

a report on the proposed Keystone XL pipeline project. December 10, 2010 United States-Russia Joint Statement on the Results of the Nuclear Energy and Nuclear Security Working...

208

IA CRYPTOGRAPHIC SERIES THE INDEX OF COINCIDENCE  

E-Print Network [OSTI]

to make assumptions of plain-text equivalents for the cipher letters constituting a message assumptions whatever of plain-text values Jor the cipher letters. It is true that cipher systems admitting employing as many as 125 random mixed secondary alpha- bets can be solved without assuming a plain

Babinkostova, Liljana

209

Type Ia Supernovae Project at NERSC  

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

principles is difficult because simulation results are quite sensitive to how the thermonuclear runaway is ignited (e.g., at the center or slightly off center on one side); to...

210

IA Blog Archive | Department of Energy  

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

between the two countries. June 16, 2014 Ministers Meet in Addis Ababa for U.S.-Africa Energy Ministerial Learn more about the U.S.-Africa Energy Ministerial, held June 3-4,...

211

Independent Oversight Review, Lawrence Livermore National Laboratory -  

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

Lawrence Livermore National Lawrence Livermore National Laboratory - September 2011 Independent Oversight Review, Lawrence Livermore National Laboratory - September 2011 September 2011 Review of Integrated Safety Management System Effectiveness at Lawrence Livermore National Laboratory The purpose of this review was to assess the effectiveness of the integrated safety management system (ISMS) established and implemented by Lawrence Livermore National Laboratory (LLNL). Independent Oversight Review, Lawrence Livermore National Laboratory - September 2011 More Documents & Publications Independent Oversight Inspection of Environment, Safety, and Health Management at the Lawrence Livermore National Laboratory, Technical Appendices, Volume II, December 2004 Independent Oversight Inspection, Lawrence Livermore National Laboratory,

212

Independent Oversight Review, Livermore Site Office - October...  

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

Review, Livermore Site Office - October 2011 October 2011 Review of Integrated Safety Management System Effectiveness at the Livermore Site Office This report provides the...

213

Independent Oversight Review, Lawrence Livermore National Laboratory...  

Office of Environmental Management (EM)

Livermore National Laboratory - September 2011 September 2011 Review of Integrated Safety Management System Effectiveness at Lawrence Livermore National Laboratory This report...

214

Expanding Your Horizons Conference, Lawrence Livermore National...  

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

Expanding Your Horizons Conference, Lawrence Livermore National Lab Expanding Your Horizons Conference, Lawrence Livermore National Lab August 1, 2013 6:45PM EDT to August 31, 2013...

215

Oversight Reports - Lawrence Livermore National Laboratory |...  

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

Oversight Review, Lawrence Livermore National Laboratory - September 2013 Review of the Fire Protection Program at Lawrence Livermore National Laboratory July 19, 2013...

216

Analysis Activities at Lawrence Livermore National Laboratory  

Broader source: Energy.gov [DOE]

Presentation on Lawrence Livermores analysis activities to the DOE Systems Analysis Workshop held in Washington, D.C. July 28-29, 2004.

217

Edward Jones, Lawrence Livermore National Laboratory, Outcomes...  

Energy Savers [EERE]

Edward Jones, Lawrence Livermore National Laboratory, Outcomes of U.S.-Japan Roundtable Edward Jones, Lawrence Livermore National Laboratory, Outcomes of U.S.-Japan Roundtable...

218

Independent Oversight Inspection, Lawrence Livermore National Laboratory- June 2005  

Broader source: Energy.gov [DOE]

Inspection of Emergency Management at the Livermore Site Office and Lawrence Livermore National Laboratory

219

Independent Oversight Inspection, Lawrence Livermore National Laboratory- February 2009  

Broader source: Energy.gov [DOE]

Inspection of Emergency Management at the Livermore Site Office and Lawrence Livermore National Laboratory

220

Santer of Lawrence Livermore National  

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

But vast numbers of them form an aerosol haze that moderates and obscures the "greenhouse effect" caused by heat-trapping gases. In 1995, Benjamin Santer of Lawrence Livermore...

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While these samples are representative of the content of NLEBeta,
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to obtain the most current and comprehensive results.


221

Lawrence Livermore National Laboratory: Phonebook  

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

Phonebook Phonebook Address and Phone Numbers Lawrence Livermore National Laboratory 7000 East Ave., Livermore, CA 94550-9234( For deliveries, enter off of Greenville Road) P.O. Box 808, Livermore, CA 94551-0808 (Mail) Main Operator (925) 422-1100 Fax (925) 422-1370, Fax verification (925) 422-1100 Employment Verification Hot Line (925) 422-9348 Public Affairs (925) 422-4599 Search for individuals by last name or full name. Use * for a wildcard. Phonebook: Warning: This Electronic Phonebook is provided solely for official use by the Lawrence Livermore National Laboratory community. Using information obtained from this Phonebook to contact individuals for purposes other than official Laboratory business is forbidden. If you have any questions, please contact Public Affairs at (925) 422-4599.

222

Lawrence Livermore National Laboratory | Department of Energy  

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

Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory | July 2011 Aerial View Lawrence Livermore National Laboratory | July 2011 Aerial View Lawrence Livermore National Laboratory's (LLNL) primary mission is research and development in support of national security. As a nuclear weapons design laboratory, LLNL has responsibilities in nuclear stockpile stewardship. LLNL also applies its expertise to prevent the spread and use of weapons of mass destruction and strengthen homeland security. Other areas include advanced defense technologies, energy, environment, biosciences, and basic science. Enforcement July 22, 2013 Enforcement Letter, NEL-2013-03 Issued to Lawrence Livermore National Security, LLC related to Programmatic

223

Enforcement Documents - Lawrence Livermore National Laboratory | Department  

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

Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory Enforcement Documents - Lawrence Livermore National Laboratory July 22, 2013 Enforcement Letter, NEL-2013-03 Issued to Lawrence Livermore National Security, LLC related to Programmatic Deficiencies in the Software Quality Assurance Program at the Lawrence Livermore National Laboratory February 23, 2006 Preliminary Notice of Violation, University of California - EA-2006-01 Preliminary Notice of Violation issued to the University of California related to Radiological Uptakes, a Radioactive Material Spill, and Radiological Protection Program, Quality Assurance, and Safety Basis Deficiencies at the Lawrence Livermore National Laboratory June 2, 2005 Enforcement Letter, Lawrence Livermore National Laboratory - June 2, 2005

224

Independent Activity Report, Lawrence Livermore National Laboratory -  

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

Activity Report, Lawrence Livermore National Laboratory Activity Report, Lawrence Livermore National Laboratory - October 2012 Independent Activity Report, Lawrence Livermore National Laboratory - October 2012 October 2012 Lawrence Livermore National Laboratory Site Lead Planning Activities [HIAR LLNL-2012-10-23] The purpose of this Office of Health, Safety and Security (HSS) Independent Oversight activity was to maintain site operational awareness of key nuclear safety performance areas, monitor ongoing site oversight and planning activities for Lawrence Livermore National Laboratory (LLNL) nuclear facilities, and identify and initiate coordination of future HSS oversight activities at the site, including planned HSS targeted reviews planned for Fiscal Year (FY) 2013. Independent Activity Report, Lawrence Livermore National Laboratory -

225

Science on Saturday @ Lawrence Livermore Lab | Department of...  

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

on Saturday @ Lawrence Livermore Lab Science on Saturday @ Lawrence Livermore Lab January 26, 2013 1:30PM EST Bankhead Theatre in downtown Livermore, CA Science on Saturday....

226

Berkeley Supernova Ia Program V. Late-time spectra of Type Ia Supernovae  

Science Journals Connector (OSTI)

......normal-velocity objects, the red points HV objects and the black...A. Diamond-Stanic, E. Gates, K. Hiner, M. Kandrashoff...2004) 128:387. Hicken M. , Wood-Vasey W. M., Blondin S...al. ApJ (2009) 699:L139. Wood-Vasey W. M. , et al. ApJ......

Jeffrey M. Silverman; Mohan Ganeshalingam; Alexei V. Filippenko

2013-01-01T23:59:59.000Z

227

1 | EqIA Summary| Diversity Team| 08/12/08 EqIA Summary  

E-Print Network [OSTI]

, in particular benefits relating to age as there will be a strong focus on bio energy, which will support fuel economy and fuel security issues. Monitoring/Evaluation The Action Plan will be monitored primarily

228

EIS-0028: Lawrence Livermore National Laboratory and Sandia National Laboratories- Livermore Sites, Livermore, CA  

Broader source: Energy.gov [DOE]

The statement assesses the potential impacts associated with current operation of the Lawrence Livermore National Laboratory and Sandia National Laboratories , Livermore, adjacent sites. This includes the impacts from postulated accidents associated with the activities. Various effluents including radioactive ones are released to the environment. However, a continuing comprehensive monitoring program is carried out to assist in the control of hazardous effluents. Alternatives considered to current operation of the laboratories include: (1) shutdown and decommissioning, (2) total or partial relocation, (3) scaling down those operations having greatest impact , and (4) wider use of alternate technologies having reduced impact .

229

University of California Lawrence Livermore  

E-Print Network [OSTI]

University of California Lawrence Livermore National Laboratory John Lindl - LLNL Fusion Energy Program Leader *This work was performed under the auspices of the U. S. Department of Energy by Lawrence and the Inertial Fusion Energy Program #12;Outline of Talk · The National Ignition Facility (NIF) · Indirect Drive

230

Enforcement Letter, Lawrence Livermore National Security, LLC- May 2008  

Broader source: Energy.gov [DOE]

Issued to Lawrence Livermore National Security, LLC related to the Protection of Classified Information at the Lawrence Livermore National Laboratory

231

Independent Oversight Inspection, Lawrence Livermore National Laboratory -  

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

Inspection, Lawrence Livermore National Inspection, Lawrence Livermore National Laboratory - May 2007 Independent Oversight Inspection, Lawrence Livermore National Laboratory - May 2007 May 2007 Inspection of Environment, Safety, and Health Programs at the Lawrence Livermore National Laboratory The U.S. Department of Energy (DOE) Office of Independent Oversight, within the Office of Health, Safety and Security (HSS), conducted an inspection of environment, safety, and health (ES&H) programs at the DOE Lawrence Livermore National Laboratory (LLNL) during January and February 2007. The inspection was performed by Independent Oversight's Office of Environment, Safety and Health Evaluations. LSO's oversight has matured, and operational awareness and assessments have improved in gathering data and identifying deficiencies. LSO

232

Livermore Contract Announcement | Department of Energy  

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

Livermore Contract Announcement Livermore Contract Announcement Livermore Contract Announcement May 8, 2007 - 12:45pm Addthis Remarks as Prepared for Energy Secretary Samuel Bodman Good afternoon. Thank you all for coming and welcome to the Lawrence Livermore National Laboratory employees who are watching this on our Webcast. I know my remarks are of special importance to you. The Lawrence Livermore National Laboratory opened in 1952 using the "team science" approach pioneered by Ernest O. Lawrence. Livermore was - and is - a place where "new ideas" are dominant. Few would have predicted back then how deeply the work conducted at Lawrence Livermore would influence the course of history. And yet it has. Today is the 123rd anniversary of President Harry S Truman's birth. The first Cold War president, Truman's decisive

233

Oversight Reports - Lawrence Livermore National Laboratory | Department of  

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

Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory Oversight Reports - Lawrence Livermore National Laboratory October 2, 2013 Independent Oversight Review, Lawrence Livermore National Laboratory - September 2013 Review of the Fire Protection Program at Lawrence Livermore National Laboratory July 19, 2013 Independent Oversight Review, Lawrence Livermore National Laboratory - July 2013 Review of Preparedness for Severe Natural Phenomena Events at the Lawrence Livermore National Laboratory April 12, 2013 Independent Activity Report, Lawrence Livermore National Laboratory - February 2013 Lawrence Livermore National Laboratory Operational Drill at the B332 Plutonium Facility [HIAR LLNL-2013-02-27] December 18, 2012 Independent Activity Report, Lawrence Livermore National Laboratory -

234

Independent Oversight Inspection, Lawrence Livermore National Laboratory -  

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

Lawrence Livermore National Lawrence Livermore National Laboratory - February 2009 Independent Oversight Inspection, Lawrence Livermore National Laboratory - February 2009 February 2009 Inspection of Emergency Management at the Livermore Site Office and Lawrence Livermore National Laboratory The U.S. Department of Energy (DOE) Office of Independent Oversight inspected the emergency management program at DOE's Lawrence Livermore National Laboratory (LLNL) in October/November 2008. The inspection was performed by Independent Oversight's Office of Emergency Management Oversight. This 2008 inspection found that overall, the LLNL emergency management program is, with a few exceptions, well defined and better implemented in most areas than observed during previous inspections, but some implementation weaknesses remain that diminish the ability of the program

235

Categorical Exclusion Determinations: Lawrence Livermore Site Office |  

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

Lawrence Livermore Site Lawrence Livermore Site Office Categorical Exclusion Determinations: Lawrence Livermore Site Office Categorical Exclusion Determinations issued by Lawrence Livermore Site Office. DOCUMENTS AVAILABLE FOR DOWNLOAD September 18, 2012 CX-010083: Categorical Exclusion Determination Radiography of Explosive Samples B321C CX(s) Applied: B3.6 Date: 09/18/2012 Location(s): California Offices(s): Lawrence Livermore Site Office September 18, 2012 CX-009257: Categorical Exclusion Determination Radiography of Explosive Samples B321C CX(s) Applied: B3.6 Date: 09/18/2012 Location(s): California Offices(s): Lawrence Livermore Site Office May 14, 2012 CX-008172: Categorical Exclusion Determination High-Pressure Crogenic Pump and Hydrogen Filling Station CX(s) Applied: B5.15 Date: 05/14/2012

236

Independent Oversight Inspection, Lawrence Livermore National Laboratory -  

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

Lawrence Livermore National Lawrence Livermore National Laboratory - June 2005 Independent Oversight Inspection, Lawrence Livermore National Laboratory - June 2005 June 2005 Inspection of Emergency Management at the Livermore Site Office and Lawrence Livermore National Laboratory The Secretary of Energy's Office of Independent Oversight and Performance Assurance (OA), within the Office of Security and Safety Performance Assurance, conducted an inspection of the emergency management program at the U.S. Department of Energy (DOE) Lawrence Livermore National Laboratory (LLNL) site in June 2005. The inspection was performed by the OA Office of Emergency Management Oversight. This 2005 OA inspection determined that LLNL has completed program development work or has established an appropriate framework for nearly all

237

Lawrence Livermore National Laboratory | National Nuclear Security  

National Nuclear Security Administration (NNSA)

Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory Home > About Us > Our Operations > Acquisition and Project Management > M & O Support Department > Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory DE-AC52-07NA27344 Operated by Lawrence Livermore National Security, LLC BASIC Contract (Official) Modifications (Official) Funding Mods Available Upon Request Conformed Contract (Unofficial) LLNL Sec A (SF33) (pdf, 91KB) See Modifications Section under Conformed Contract Link LLNS Conformed Contract (weblink) LLNL Sec B-H (pdf, 306KB) LLNL Sec I pdf 687KB LLNL Sec J Appx A (pdf, 67KB) LLNL Sec J Appx B (pdf, 191KB) LLNL Sec J Appx C (pdf, 11KB) LLNL Sec J Appx D (pdf, 18KB)

238

Lawrence Livermore National Laboratory | Open Energy Information  

Open Energy Info (EERE)

Livermore National Laboratory Livermore National Laboratory (Redirected from Lawrence Livermore National Lab) Jump to: navigation, search Logo: Lawrence Livermore National Laboratory Name Lawrence Livermore National Laboratory Address 7000 East Ave. Place Livermore, California Zip 94550-9234 Number of employees 5001-10,000 Year founded 1952 Notes LLNL-WEB-422768 Coordinates 37.6798282°, -121.7107786° 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":37.6798282,"lon":-121.7107786,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

239

Independent Activity Report, Lawrence Livermore National Laboratory -  

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

October 2012 October 2012 Independent Activity Report, Lawrence Livermore National Laboratory - October 2012 October 2012 Lawrence Livermore National Laboratory Site Lead Planning Activities [HIAR LLNL-2012-10-23] The purpose of this Office of Health, Safety and Security (HSS) Independent Oversight activity was to maintain site operational awareness of key nuclear safety performance areas, monitor ongoing site oversight and planning activities for Lawrence Livermore National Laboratory (LLNL) nuclear facilities, and identify and initiate coordination of future HSS oversight activities at the site, including planned HSS targeted reviews planned for Fiscal Year (FY) 2013. Independent Activity Report, Lawrence Livermore National Laboratory - October 2012 More Documents & Publications

240

Preliminary Notice of Violation, Lawrence Livermore National...  

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

Lawrence Livermore National Laboratory, (EA-2003-04) On September 3, 2003, the National Nuclear Security Administration issued a Preliminary Notice of Violation (EA-2003-04) to...

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Enforcement Documents - Lawrence Livermore National Laboratory...  

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

Lawrence Livermore National Laboratory for Quality Assurance Deficiencies related to Weapon Activities, June 2, 2005 September 10, 2003 Preliminary Notice of Violation, Lawrence...

242

Independent Oversight Inspection, Lawrence Livermore National...  

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

National Laboratory - May 2007 May 2007 Inspection of Environment, Safety, and Health Programs at the Lawrence Livermore National Laboratory This report provides the...

243

Preliminary Notice of Violation, Lawrence Livermore National...  

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

National Security, LLC - September 25, 2014 September 25, 2014 Worker Safety and Health Enforcement Preliminary Notice of Violation issued to Lawrence Livermore National...

244

Independent Oversight Inspection, Lawrence Livermore National...  

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

National Laboratory - July 2013 Independent Oversight Inspection, Lawrence Livermore National Laboratory - June 2005 Independent Oversight Inspection, Nevada Test Site - June 2007...

245

Independent Activity Report, Lawrence Livermore National Laboratory...  

Office of Environmental Management (EM)

and the Alameda County Fire Department to a fire in a fume hood containing a depleted uranium part. Independent Activity Report, Lawrence Livermore National Laboratory -...

246

Independent Oversight Review, Lawrence Livermore National Laboratory -  

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

Review, Lawrence Livermore National Review, Lawrence Livermore National Laboratory - December 2009 Independent Oversight Review, Lawrence Livermore National Laboratory - December 2009 December 2009 Review of Nuclear Safety at the Lawrence Livermore National Laboratory The U.S. Department of Energy (DOE), Office of Health, Safety and Security (HSS), performed a review of nuclear safety programs at the DOE Lawrence Livermore National Laboratory (LLNL) from October through November 2009. The review was performed by the HSS Office of Independent Oversight's Office of Environment, Safety and Health (ES&H) Evaluations. LLNL has made significant progress in establishing and implementing comprehensive programs to effectively manage nuclear safety. LLNL has devoted considerable management attention and resources to enhance nuclear

247

Independent Oversight Inspection, Lawrence Livermore National Laboratory,  

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

Inspection, Lawrence Livermore National Inspection, Lawrence Livermore National Laboratory, Volume I - December 2004 Independent Oversight Inspection, Lawrence Livermore National Laboratory, Volume I - December 2004 December 2004 Inspection of Environment, Safety, and Health Management at the Lawrence Livermore National Laboratory The U.S. Department of Energy (DOE) Office of Independent Oversight and Performance Assurance (OA), within the Office of Security and Safety Performance Assurance (SSA), conducted an inspection of environment, safety, and health (ES&H) at the DOE Lawrence Livermore National Laboratory (LLNL) during October and November 2004. The inspection was performed by the OA Office of Environment, Safety and Health Evaluations. LSO and LLNL have established ISM systems that are conceptually sound but

248

Independent Oversight Review, Lawrence Livermore National Laboratory -  

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

Lawrence Livermore National Lawrence Livermore National Laboratory - September 2013 Independent Oversight Review, Lawrence Livermore National Laboratory - September 2013 September 2013 Review of the Fire Protection Program at Lawrence Livermore National Laboratory This report documents the results of an independent oversight review of the fire protection program at the Lawrence Livermore National Laboratory. The review was performed June 10-21, 2013, by the U.S. Department of Energy's (DOE) Office of Safety and Emergency Management Evaluations, which is within the DOE Office of Health, Safety and Security. The review was one part of a targeted assessment of fire protection at nuclear facilities across the DOE complex, including National Nuclear Security Administration sites. The purpose of the Independent Oversight targeted assessment was to

249

Independent Oversight Review, Lawrence Livermore National Laboratory -  

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

Lawrence Livermore National Lawrence Livermore National Laboratory - September 2013 Independent Oversight Review, Lawrence Livermore National Laboratory - September 2013 September 2013 Review of the Fire Protection Program at Lawrence Livermore National Laboratory This report documents the results of an independent oversight review of the fire protection program at the Lawrence Livermore National Laboratory. The review was performed June 10-21, 2013, by the U.S. Department of Energy's (DOE) Office of Safety and Emergency Management Evaluations, which is within the DOE Office of Health, Safety and Security. The review was one part of a targeted assessment of fire protection at nuclear facilities across the DOE complex, including National Nuclear Security Administration sites. The purpose of the Independent Oversight targeted assessment was to

250

Environmental Survey preliminary report, Lawrence Livermore National Laboratory, Livermore, California  

SciTech Connect (OSTI)

This report presents the preliminary findings from the first phase of the Environmental Survey of the Department of Energy (DOE) Lawrence Livermore National Laboratory (LLNL), conducted December 1 through 19, 1986. The Survey is being conducted by an interdisciplinary team of environmental specialists, led and managed by the Office of Environment, Safety and Health's Office of Environmental Audit. Individual team components are being supplied by a private contractor. The objective of the Survey is to identify environmental problems and areas of environmental risk associated with LLNL. The Survey covers all environmental media all areas of environmental regulation. It is being performed in accordance with the DOE Environmental Survey Manual. This phase of the Survey involves the review of existing site environmental data, observations of the operations performed at LLNL, and interviews with site personnel. A Sampling and Analysis Plan was developed to assist in further assessing certain of the environmental problems identified during performance of on-site activities. The Sampling and Analysis Plan will be executed by a DOE National Laboratory. When completed, the results will be incorporated into the LLNL Environmental Survey Interim Report. The Interim Report will reflect the final determinations of the LLNL Survey. 70 refs., 58 figs., 52 tabs.,

Not Available

1987-12-01T23:59:59.000Z

251

Independent Activity Report, Lawrence Livermore National Laboratory -  

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

February 2013 February 2013 Independent Activity Report, Lawrence Livermore National Laboratory - February 2013 February 2013 Lawrence Livermore National Laboratory Operational Drill at the B332 Plutonium Facility [HIAR LLNL-2013-02-27] The Livermore Site Office (LSO) and Lawrence Livermore National Security, LLC (LLNS) requested personnel from the U.S. Department of Energy (DOE) Office of Safety and Emergency Management Evaluations (HS-45) to observe an operational drill at the Plutonium Facility in Building 332 (B332). LSO and LLNS desired HS-45's participation to help determine the maturity of the operational drill program by providing independent expertise in the matter at a time when HS-45 personnel were already on site conducting an emergency management review. LLNS administered this operational drill using the DOE guidance for

252

Livermore Contract Announcement | Department of Energy  

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

afternoon. Thank you all for coming and welcome to the Lawrence Livermore National Laboratory employees who are watching this on our Webcast. I know my remarks are of special...

253

Site Visit Report, Lawrence Livermore National Laboratory- March 2010  

Broader source: Energy.gov [DOE]

Review of the Lawrence Livermore National Laboratory Identified Defective Department of Transportation Hazardous Material Packages

254

Independent Oversight Review, Lawrence Livermore National Laboratory- September 2011  

Broader source: Energy.gov [DOE]

Review of Integrated Safety Management System Effectiveness at Lawrence Livermore National Laboratory

255

Independent Oversight Inspection, Lawrence Livermore National Laboratory- May 2007  

Broader source: Energy.gov [DOE]

Inspection of Environment, Safety, and Health Programs at the Lawrence Livermore National Laboratory

256

Independent Oversight Review, Lawrence Livermore National Laboratory- August 2014  

Broader source: Energy.gov [DOE]

Review of the Lawrence Livermore National Laboratory Radiological Controls Activity-Level Implementation.

257

Independent Oversight Review, Lawrence Livermore National Laboratory- July 2013  

Broader source: Energy.gov [DOE]

Review of Preparedness for Severe Natural Phenomena Events at the Lawrence Livermore National Laboratory

258

Preliminary Notice of Violation, Lawrence Livermore National Laboratory -  

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

Lawrence Livermore National Lawrence Livermore National Laboratory - EA-2000-12 Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-2000-12 September 27, 2000 Preliminary Notice of Violation issued to the University of California related to Authorization Basis Issues at the Lawrence Livermore National Laboratory, (EA-2000-12) This letter refers to the Department of Energy's (DOE) investigation of the facts and circumstances concerning Lawrence Livermore National Laboratory (LLNL) maintenance and adherence to documents, which form the Authorization Basis (AB) for the Laboratory's nuclear facilities. Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-2000-12 More Documents & Publications Enforcement Letter, Lawrence Livermore National Laboratory - November 5,

259

EIS-0157: Site-wide for Continued Operation of Lawrence Livermore/Sandia National Laboratory, Livermore  

Broader source: Energy.gov [DOE]

The Department of Energy prepared this environmental impact statement to analyze the potential environmental impacts of the continued operation of Lawrence Livermore National Laboratory and Sandia National Laboratory - Livermore, including programmatic enhancements and facility modifications to occur over the subsequent 10-year term that are pursuant to research and development missions established for the Laboratories by Congress and the President.

260

Sandia National Laboratories: Locations: Livermore, California  

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

Livermore, California Livermore, California Livermore, California administration building For more than 50 years, the California campus of Sandia National Laboratories has delivered essential science and technology to resolve the nation's most challenging security issues. Many of these challenges - like energy resources, transportation, immigration, ports, and more - surfaced early in the state of California, providing Sandia/California with a special opportunity to participate in the first wave of solutions to important national problems. For example, Sandia's scientists are breaking new ground in energy research and are helping to accelerate the development of next-generation biofuels so that we can reduce our nation's dependence on foreign oil and mitigate the effects of global climate change.

Note: This page contains sample records for the topic "livermore ia ia" 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

Lawrence Livermore National Laboratory | Open Energy Information  

Open Energy Info (EERE)

National Laboratory National Laboratory Jump to: navigation, search Logo: Lawrence Livermore National Laboratory Name Lawrence Livermore National Laboratory Address 7000 East Ave. Place Livermore, California Zip 94550-9234 Number of employees 5001-10,000 Year founded 1952 Notes LLNL-WEB-422768 Coordinates 37.6798282°, -121.7107786° 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":37.6798282,"lon":-121.7107786,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

262

Record simulations conducted on Lawrence Livermore supercomputer  

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

5 5 For immediate release: 03/19/2013 | NR-13-03-05 Record simulations conducted on Lawrence Livermore supercomputer Breanna Bishop, LLNL, (925) 423-9802, bishop33@llnl.gov Printer-friendly OSIRIS simulation on Sequoia of the interaction of a fast-ignition-scale laser with a dense DT plasma. The laser field is shown in green, the blue arrows illustrate the magnetic field lines at the plasma interface and the red/yellow spheres are the laser-accelerated electrons that will heat and ignite the fuel. High Resolution Image LIVERMORE, Calif. -- Researchers at Lawrence Livermore National Laboratory have performed record simulations using all 1,572,864 cores of Sequoia, the largest supercomputer in the world. Sequoia, based on IBM BlueGene/Q architecture, is the first machine to exceed one million computational

263

Researcher, Lawrence Livermore National Laboratory | National Nuclear  

National Nuclear Security Administration (NNSA)

Bruce Macintosh Bruce Macintosh Researcher, Lawrence Livermore National Laboratory Bruce Macintosh Bruce Macintosh Role: Researcher, Lawrence Livermore National Laboratory Award: AAAS Newcomb Cleveland Prize Profile: A Lawrence Livermore National Laboratory researcher's paper published in November 2008 is co-winner of this year's American Association for the Advancement of Science (AAAS) Newcomb Cleveland Prize. The Paper is one of two outstanding papers published in Science from June 1, 2008 through May 31, 2009. Bruce Macintosh of the Physics and Life Science Directorate was one of the lead authors of the paper titled, "Direct Imaging of Multiple Planets orbiting the Star HR 8799," which appeared in the Nov. 28, 2008 edition of Science. Christian Marois, a former LLNL postdoc now at NRC Herzberg

264

Independent Oversight Review, Lawrence Livermore National Laboratory - July  

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

Independent Oversight Review, Lawrence Livermore National Independent Oversight Review, Lawrence Livermore National Laboratory - July 2013 Independent Oversight Review, Lawrence Livermore National Laboratory - July 2013 July 2013 Review of Preparedness for Severe Natural Phenomena Events at the Lawrence Livermore National Laboratory The Office of Enforcement and Oversight (Independent Oversight), within the Office of Health, Safety and Security (HSS), conducted an independent review of the National Nuclear Security Administration (NNSA) Livermore Field Office (LFO) and Lawrence Livermore National Laboratory (LLNL) Site 200 preparedness for severe natural phenomena events (NPEs). The HSS Office of Safety and Emergency Management Evaluations performed this review to evaluate the processes for identifying emergency response capabilities and

265

Preliminary Notice of Violation, Lawrence Livermore National Laboratory -  

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

Lawrence Livermore National Lawrence Livermore National Laboratory - EA-2003-04 Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-2003-04 September 3, 2003 Preliminary Notice of Violation issued to the University of California related to an Extremity Radiological Overexposure at the Lawrence Livermore National Laboratory, (EA-2003-04) This letter refers to the recent investigation by the Department of Energy's Office of Price-Anderson Enforcement (OE) of the June 2002 extremity radiological overexposure event. Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-2003-04 More Documents & Publications Preliminary Notice of Violation, University of California - EA-2006-01 Preliminary Notice of Violation, Lawrence Livermore National Laboratory -

266

K-corrections and spectral templates of Type Ia supernovae  

E-Print Network [OSTI]

discovery that the cosmic expansion is now accelerating; this acceleration is believed to be driven by dark energy,

Hsiao, E. Y.

2008-01-01T23:59:59.000Z

267

Type Ia Supernova Spectral Line Ratios as Luminosity Indicators  

E-Print Network [OSTI]

crucial role in the discovery of the dark energy, v i a theled to the discovery of the "dark energy" (Riess et al.

Bongard, Sebastien; Baron, E.; Smadja, G.; Branch, David; Hauschildt, Peter H.

2005-01-01T23:59:59.000Z

268

Closest Type Ia Supernova in Decades Solves a Cosmic Mystery  

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

use to measure cosmic growth, a technique that in 1998 led to the discovery of dark energy - and 13 years later to a Nobel Prize, "for the discovery of the accelerating...

269

The Photometric Properties of Nearby Type Ia Supernovae  

E-Print Network [OSTI]

discovery and subsequent study of the accelerating expansion of the Universe and dark energy (discovery that the Universe is expanding at an accelerating rate, probably due to an unexplained, unidentified dark energy.

Ganeshalingam, Mohan

2012-01-01T23:59:59.000Z

270

Rates, progenitors and cosmic mix of Type Ia supernovae  

Science Journals Connector (OSTI)

......2004) from the supernova survey spin-off of the GOODS project (Giavalisco et al. 2004). The mentioned Gaussian DDT is...fig. 13 in Greggio (2005). For this reason, we take the liberty of re-discussing here the Della Valle et al. interpretation......

Laura Greggio; Alvio Renzini; Emanuele Daddi

2008-08-01T23:59:59.000Z

271

IA Scieaoe Service Foature 1 WHY THE ITEATHER ' 1  

E-Print Network [OSTI]

high, 6 feet wide and 3 feet through can lift a man off his feet in n strong vind, It 0811 raise a mile the leader to go higher. Tsvo miles high is not an uncommon attainment f o r the first kite, nhile four miles increases suddenly, the strain on the wire may reach the breaking point and anay will go the kites and wire

272

Nicolas Turenne @ INRA 2006 1 Sujets Projets IA  

E-Print Network [OSTI]

.62 computer,internet,7.58 plane,car,5.77 LISTING abuse accommodation activity admission airport alcohol

Turenne, Nicolas

273

Math PUrview - Summer 1998 - IAS/Park City Mathematics Institute ...  

E-Print Network [OSTI]

The selected teachers are individuals who are interested in the dual role of initiating reform within their own classrooms and assuming a leadership role in local...

274

2012 Professional Development Meeting; Ames, IA Research update: Bee health  

E-Print Network [OSTI]

, pumpkins · Cantaloupes, watermelons · Carrots, canola, alfalfa · Almonds, macadamia and other nut crops #12+ million ac), most wheat (24 million ac), canola, cotton, etc. · Rates range from 0.25-1.25 mg

Jurenka, Russell A.

275

Burning Thermals in Type Ia Supernovae A. J. Aspden1  

E-Print Network [OSTI]

. It is generally agreed that they result from the thermonuclear explosion of a white dwarf accreting matter from that a thermonuclear explosion is involved means that a realistic model requires an understanding of both the ignition

276

The Photometric Properties of Nearby Type Ia Supernovae  

E-Print Network [OSTI]

1.1.1 Thermonuclear SNe . . . . . . 1.1.2 Core-Collapseby which they explode: thermonuclear and core collapse.thesis is focused on thermonuclear SNe, I describe the two

Ganeshalingam, Mohan

2012-01-01T23:59:59.000Z

277

SN Ia host galaxy properties and the dust extinction distribution  

Science Journals Connector (OSTI)

......due to the destruction or dispersion of the dusty interstellar medium by stellar winds prior to the ignition of the supernova. In...the possibility that the geometry of the dusty interstellar medium (ISM) (and hence the extinction distribution) may change......

B. W. Holwerda; A. Reynolds; M. Smith; R. C. Kraan-Korteweg

2015-02-01T23:59:59.000Z

278

Microsoft PowerPoint - IEEE IAS PES 102313.pptx  

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

Devices in SGIG Projects Results and Case Studies Recent DOE SGIG Reports 15 * Economic Impact of Smart Grid Investments April 2013 * 2012 Progress Report July...

279

Dynamic Optimization of IA-32 Applications Under DynamoRIO  

E-Print Network [OSTI]

programs statically is diminishing. The advent and increased use of shared libraries, dynamic class loading, and runtime binding means that the compiler has, even with difficult to accurately obtain profiling data, less is known and very accurate profiling data can be obtained. This thesis presents two uses of the Dynamo

Amarasinghe, Saman

280

Oddelek za fiziko Seminar Ia -1. letnik, II. stopnja  

E-Print Network [OSTI]

the whole history, the mankind has been facing problems of energy sufficiency and efficiency. Nowadays, when is solar power. The energy of solar photons has already been implemented in solar cells generating electrical energy. But solar energy can be used directly to produce heat and drive a generator as well

?umer, Slobodan

Note: This page contains sample records for the topic "livermore ia ia" 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

Tracked Flame Simulation for Type Ia Yongmin Zhang1  

E-Print Network [OSTI]

tracking of the ame front which is critically important to the accurate modeling of turbulent thermonuclear, and the strength and brightness of the burning are all determined by the speed of thermonuclear burning 12, 13 needs to model the propagation of thermonuclear burning inside the exploding star. The mech- anism

New York at Stoney Brook, State University of

282

LES Simulations of Turbulent Combustion in a Type Ia Supernovae  

E-Print Network [OSTI]

to be thermonuclear explosions of white dwarfs. SNIa are important sources of energy and chemical elements deposited of the burning are all determined by the speed of thermonuclear burning [27]. The problem of turbulent combustion. The mechanism and the speed of thermonuclear burning in SNIa remain an unsolved theoretical problem. A recent

New York at Stoney Brook, State University of

283

Visualizing Buoyant Burning Bubbles in Type Ia Supernovae at...  

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

simulation was conducted using a specialized low Mach number hydrodynamics code for thermonuclear flames. Adaptive mesh refinement was used to focus resolution on the bubble,...

284

Cosmology with Type Ia The Sloan Digital Sky Survey  

E-Print Network [OSTI]

- Present) - Cosmic Microwave Background - Supernovae and Dark Energy - Galaxy Clustering SDSS Supernova% of recollapse density · Favors Dark Energy #12;M51: June 2005 M51: July 2005 #12;#12;· Easy to identify · Geometry is flat · ~70% Dark Energy · ~30% Matter · There was a Big Bang · There will be a Big Chill #12

Cinabro, David

285

Lawrence Livermore National Laboratory December 13, 2004  

E-Print Network [OSTI]

John Lindl Lawrence Livermore National Laboratory December 13, 2004 The NIF Ignition Program Presentation to Fusion Power Associates Meeting #12;NIF-0202-0XXXXppt 15/GHM/tr Outline · Ignition Introduction 104 105 500 50 5 0.5 Capsule energy (KJ) NIF Relaxed pressure and stability requirements

286

NJ WY AK AL CA AR CO CT DE FL GA HI ID KS IL IN IA IA KY LA  

Gasoline and Diesel Fuel Update (EIA)

accomplishments accomplishments are impressive in themselves, and associ- ated with each milestone is the expansion of future produc- tion opportunities as another technical barrier is overcome. The extension of recovery opportunities into deep water has established the deep offshore as an area of considerable national significance. A second source of increased supply is gas from coalbed formations. Natural gas production from coalbed methane fields continued to grow in 1996 as projects initiated mainly in the early to mid 1990's matured through the dewatering phase into higher rates of gas production. Coalbed forma- tions contribute almost 1 trillion cubic feet, roughly 5 per- cent, to total U.S. production. Continued production growth from coalbeds is not likely in light of the precipitous drop in new wells completed in coalbed formations since the termination of the production tax

287

Berkeley Supernova Ia Program I. Observations, data reduction and spectroscopic sample of 582 low-redshift Type Ia supernovae  

Science Journals Connector (OSTI)

......Astier et al. ; Riess et al. ; Wood-Vasey et al. ; Hicken et al...with one CCD in each of the red and blue arms of the spectrograph...AJ 112 2408. 45 Hicken M. , Wood-Vasey W. M., Blondin S...A. 1994 AJ 108 2233. 118 Wood-Vasey W. M. 2007 ApJ 666......

Jeffrey M. Silverman; Ryan J. Foley; Alexei V. Filippenko; Mohan Ganeshalingam; Aaron J. Barth; Ryan Chornock; Christopher V. Griffith; Jason J. Kong; Nicholas Lee; Douglas C. Leonard; Thomas Matheson; Emily G. Miller; Thea N. Steele; Brian J. Barris; Joshua S. Bloom; Bethany E. Cobb; Alison L. Coil; Louis-Benoit Desroches; Elinor L. Gates; Luis C. Ho; Saurabh W. Jha; Michael T. Kandrashoff; Weidong Li; Kaisey S. Mandel; Maryam Modjaz; Matthew R. Moore; Robin E. Mostardi; Marina S. Papenkova; Sung Park; Daniel A. Perley; Dovi Poznanski; Cassie A. Reuter; James Scala; Franklin J. D. Serduke; Joseph C. Shields; Brandon J. Swift; John L. Tonry; Schuyler D. Van Dyk; Xiaofeng Wang; Diane S. Wong

2012-09-21T23:59:59.000Z

288

DOE Selects Lawrence Livermore National Security, LLC to Manage its  

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

Lawrence Livermore National Security, LLC to Manage its Lawrence Livermore National Security, LLC to Manage its Lawrence Livermore National Laboratory DOE Selects Lawrence Livermore National Security, LLC to Manage its Lawrence Livermore National Laboratory May 8, 2007 - 12:45pm Addthis WASHINGTON, DC - The U.S. Department of Energy (DOE) today announced that Lawrence Livermore National Security, LLC (LLNS) has been selected to be the management and operating contractor for DOE's National Nuclear Security Administration's (NNSA) Lawrence Livermore National Laboratory in California. "Livermore National Laboratory is a critical part of our nuclear weapons complex and has been for the last 55 years," Secretary Bodman said. "For the first time since the beginning of the laboratory a new contractor is

289

Enforcement Letter, Lawrence Livermore National Laboratory- June 2, 2005  

Broader source: Energy.gov [DOE]

Issued to Lawrence Livermore National Laboratory for Quality Assurance Deficiencies related to Weapon Activities, June 2, 2005

290

Enforcement Letter, Lawrence Livermore National Laboratory- August 22, 1996  

Broader source: Energy.gov [DOE]

Issued to the University of California related to Radiological Worker Training Deficiencies at the Lawrence Livermore National Laboratory

291

Independent Activity Report, Lawrence Livermore National Laboratory- March 2011  

Broader source: Energy.gov [DOE]

Lawrence Livermore National Laboratory Chronic Beryllium Disease Prevention Program Effectiveness Review [HIAR-LLNL-2011-03-25

292

2013 Annual Planning Summary for the Lawrence Livermore National Laboratory  

Broader source: Energy.gov [DOE]

The ongoing and projected Environmental Assessments and Environmental Impact Statements for 2013 and 2014 within the Lawrence Livermore National Laboratory.

293

2011 Annual Planning Summary for Livermore Site Office (LSO)  

Broader source: Energy.gov [DOE]

The ongoing and projected Environmental Assessments and Environmental Impact Statements for 2011 and 2012 within the Livermore Site Office (LSO).

294

Voluntary Protection Program Onsite Review, Livermore Operations- January 2012  

Broader source: Energy.gov [DOE]

Evaluation to determine whether the Livermore Operations is continuing to perform at a level deserving DOE-VPP Star recognition.

295

Independent Activity Report, Lawrence Livermore National Laboratory- February 2013  

Broader source: Energy.gov [DOE]

Lawrence Livermore National Laboratory Operational Drill at the B332 Plutonium Facility [HIAR LLNL-2013-02-27

296

2012 Annual Planning Summary for Livermore Site Office  

Broader source: Energy.gov [DOE]

The ongoing and projected Environmental Assessments and Environmental Impact Statements for 2012 and 2013 within the Livermore Site Office.

297

UCRL-ID-119170 LAWRENCE LIVERMORE NATIONAL LABORATORY  

E-Print Network [OSTI]

June 1995 UCRL-ID-119170 LAWRENCE LIVERMORE NATIONAL LABORATORY University of California · Livermore, California · 94550 Science on High-Energy Lasers: From Today to the NIF Richard W. Lee, Richard. WorkperformedundertheauspicesoftheU.S.DepartmentofEnergybyLawrenceLivermoreNationalLaboratoryunder Contract W-7405-Eng-48. #12

298

Technical Qualification Program Self-Assessment Report - Livermore Field  

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

Livermore Livermore Field Office Technical Qualification Program Self-Assessment Report - Livermore Field Office The purpose of the Livermore Field Office (LFO) Teclmical Qualification Program (TQP) is to ensure that federal teclmical personnel with safety oversight responsibilities at defense nuclear facilities at Lawrence Livermore National Laboratory possess competence commensurate with responsibilities. LFO is committed to ensuring it has the necessary teclmical capabilities to provide the kind of management, direction, and guidance essential to safe operation ofDOE's defense nuclear facilities. LFO TQP Self-Assessment, May 2013 More Documents & Publications Technical Qualification Program Self-Assessment Report - Nevada Site Office Technical Qualification Program Self-Assessment Report - Sandia Site Office

299

Workforce Statistics - Livermore Field Office | National Nuclear Security  

National Nuclear Security Administration (NNSA)

Livermore Field Office | National Nuclear Security Livermore Field Office | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Workforce Statistics - Livermore Field Office Home > About Us > Our Operations > Management and Budget > Office of Civil Rights > Workforce Statistics > Workforce Statistics - Livermore Field Office Workforce Statistics - Livermore Field Office

300

Sandia National Laboratories: Locations: Livermore, California: Visiting  

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

California California Livermore, California administration building Our location and hours of operation Sandia/California is located at 7011 East Avenue in Livermore, Calif., a suburban community about 45 miles east of San Francisco. Positioned at the eastern edge of the San Francisco Bay Area, Sandia is within easy commuting distance of many affordable housing communities in San Joaquin County and the Central Valley. The official hours of operation at Sandia/California are from 7:30 a.m. to 4 p.m. PST, Monday through Friday. General inquiries can be made by calling (925) 294-3000. See our contacts page for additional information. Getting here All three major airports in the San Francisco Bay Area provide access to Sandia/California. Oakland International Airport is the closest airport to

Note: This page contains sample records for the topic "livermore ia ia" 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

Lawrence Livermore National Laboratory's Use of Time and Materials Subcontracts  

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

Lawrence Livermore National Lawrence Livermore National Laboratory's Use of Time and Materials Subcontracts OAS-M-13-06 August 2013 Department of Energy Washington, DC 20585 August 8, 2013 MEMORANDUM FOR THE MANAGER, LIVERMORE FIELD OFFICE FROM: George W. Collard Assistant Inspector General for Audits Office of Inspector General SUBJECT: INFORMATION: Audit Report on "Lawrence Livermore National Laboratory's Use of Time and Materials Subcontracts" BACKGROUND The mission of Lawrence Livermore National Laboratory (Livermore) is to strengthen the United States' security through development and application of science and technology to enhance the Nation's defense, reduce the global threat from terrorism and weapons of mass destruction, and respond to scientific issues of national importance. Livermore is operated by Lawrence

302

Welcome to the Livermore Field Office | National Nuclear Security  

National Nuclear Security Administration (NNSA)

Livermore Field Office | National Nuclear Security Livermore Field Office | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog The National Nuclear Security Administration Welcome to the Livermore Field Office Home > Field Offices > Welcome to the Livermore Field Office Welcome to the Livermore Field Office The NNSA Livermore Field Office (LFO) is located at the Lawrence Livermore

303

Consent Order, Lawrence Livermore National National Security, LLC -  

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

Lawrence Livermore National National Security, LLC - Lawrence Livermore National National Security, LLC - WCO-2010-01 Consent Order, Lawrence Livermore National National Security, LLC - WCO-2010-01 October 29, 2010 Consent Order issued to Lawrence Livermore National Security, LLC for deficiencies associated with the Lawrence Livermore National Laboratory Chronic Beryllium Disease Prevention Program This letter refers to the Office of Health, Safety and Security, Office of Enforcement investigation into deficiencies associated with the Lawrence Livermore National Laboratory (LLNL) Chronic Beryllium Disease Prevention Program (CBDPP) and related work planning and control processes. The results of the investigation were provided to Lawrence Livermore National Security, LLC (LLNS) in an Investigation Report dated July 7, 2009. An

304

Enforcement Letter, Lawrence Livermore National Security LLC, - May 15,  

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

Security LLC, - May Security LLC, - May 15, 2008 Enforcement Letter, Lawrence Livermore National Security LLC, - May 15, 2008 May 15, 2008 Enforcement Letter issued to Lawrence Livermore National Security, LLC related to the Protection of Classified Information at the Lawrence Livermore National Laboratory In our recent dialogue via televideo with your Deputy, safeguards and security director, and other key managers of your staff, we discussed our reasons for sending this enforcement letter to Lawrence Livermore National Security, LLC; the purpose of this letter; and our concerns about the protection of classified information at the Lawrence Livermore National Laboratory (LLNL). Accordingly, this is not a formal enforcement action and imposes no requirements. Enforcement Letter, Lawrence Livermore National Security LLC- May 15, 2008

305

Preliminary Notice of Violation, Lawrence Livermore National Laboratory -  

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

0-12 0-12 Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-2000-12 September 27, 2000 Preliminary Notice of Violation issued to the University of California related to Authorization Basis Issues at the Lawrence Livermore National Laboratory, (EA-2000-12) This letter refers to the Department of Energy's (DOE) investigation of the facts and circumstances concerning Lawrence Livermore National Laboratory (LLNL) maintenance and adherence to documents, which form the Authorization Basis (AB) for the Laboratory's nuclear facilities. Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-2000-12 More Documents & Publications Enforcement Letter, Lawrence Livermore National Laboratory - November 5, 1999 Enforcement Letter, Lawrence Livermore National Laboratory - August 22,

306

Site Visit Report, Lawrence Livermore National Laboratory - February 2011 |  

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

Site Visit Report, Lawrence Livermore National Laboratory - Site Visit Report, Lawrence Livermore National Laboratory - February 2011 Site Visit Report, Lawrence Livermore National Laboratory - February 2011 February 2011 Lawrence Livermore National Laboratory Safety Basis Assessment This site visit report documents the collective results of the review of Lawrence Livermore National Laboratory (LLNL) safety basis processes and discusses its scope, objective, results and conclusions. Appendix A provides lists of the documents, interviews, and observations and Appendix B includes the plan for the review. This combined assessment was sponsored by the National Nuclear Safety Administration (NNSA) Livermore Site Office (LSO) and conducted jointly by staff from the Office of Health, Safety and Security (HSS) and LSO. The review was conducted in late 2010 and included

307

Site Visit Report, Lawrence Livermore National Laboratory - March 2010 |  

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

Site Visit Report, Lawrence Livermore National Laboratory - March Site Visit Report, Lawrence Livermore National Laboratory - March 2010 Site Visit Report, Lawrence Livermore National Laboratory - March 2010 March 2010 Review of the Lawrence Livermore National Laboratory Identified Defective Department of Transportation Hazardous Material Packages This review of the Lawrence Livermore National Laboratory (LLNL) identification, immediate actions, communications, documentation, evaluation, reporting and follow-up to the discovery of defective Department of Transportation (DOT) UN1A2 55- and 30-gallon open head single bolt closure steel drums intended for storage and transportation of hazardous waste and materials, conducted on January 26-29, 2010, was sponsored by the DOE Livermore Site Office (LSO) to support interface with

308

Site Visit Report, Lawrence Livermore National Laboratory - May 2010 |  

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

Site Visit Report, Lawrence Livermore National Laboratory - May Site Visit Report, Lawrence Livermore National Laboratory - May 2010 Site Visit Report, Lawrence Livermore National Laboratory - May 2010 May 2010 Review of Lawrence Livermore National Laboratory Fire Protection Design Review Process This review of the Lawrence Livermore National Laboratory (LLNL) Fire Protection Design Review Process, conducted on March 24 through April 2, 2010, was sponsored by the U.S. Department of Energy (DOE) Livermore Site Office (LSO) and conducted jointly with LSO staff. Overall, the design review process was observed to be effective and the LLNL programs for performing these reviews were being implemented. Many aspects of the process are effective, and the personnel who implement it are knowledgeable and experienced. This review identified only one

309

Independent Activity Report, Livermore Site Office - January 2011 |  

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

Independent Activity Report, Livermore Site Office - January 2011 Independent Activity Report, Livermore Site Office - January 2011 Independent Activity Report, Livermore Site Office - January 2011 January 2011 Livermore Site Office Facility Representative Program Assessment [ARPT-LSO-2011-001] This activity report documents the results of the Office of Health, Safety and Security's (HSS) review of and participation in the Livermore Site Office Self-Assessment of the Facility Representative (FR) Program. This self-assessment was led by the U.S. Department of Energy (DOE) Livermore Site Office (LSO) and conducted by LSO staff, HSS staff, National Nuclear Security Administration (NNSA) Office of the Chief of Defense Nuclear Safety (CDNS) staff, a peer from Los Alamos Site Office, and a FR subject matter expert from NNSA.

310

Independent Activity Report, Lawrence Livermore National Laboratory - March  

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

Activity Report, Lawrence Livermore National Laboratory Activity Report, Lawrence Livermore National Laboratory - March 2011 Independent Activity Report, Lawrence Livermore National Laboratory - March 2011 March 2011 Lawrence Livermore National Laboratory Chronic Beryllium Disease Prevention Program Effectiveness Review [HIAR-LLNL-2011-03-25] The Lawrence Livermore National Laboratory (LLNL) and the Livermore Site Office (LSO) chartered a team to conduct an effectiveness review of the issues identified with the LLNL Chronic Beryllium Disease Prevention Program (CBDPP). The team included members and observers from LLNL, LSO, the National Nuclear Security Administration (NNSA), and the Office of Health, Safety and Security (HSS). The team's final report documents the results of the effectiveness review and the actions taken by LLNL to resolve and prevent recurrence of 44

311

Livermore Field Office Public Affairs | National Nuclear Security  

National Nuclear Security Administration (NNSA)

Livermore Field Office Public Affairs | National Nuclear Security Livermore Field Office Public Affairs | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Livermore Field Office Public Affairs Home > Field Offices > Welcome to the Livermore Field Office > Livermore Field Office Public Affairs Livermore Field Office Public Affairs The LFO Office of Public Affairs is the primary point of contact between

312

Independent Oversight Review, Lawrence Livermore National Laboratory - July  

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

Lawrence Livermore National Lawrence Livermore National Laboratory - July 2013 Independent Oversight Review, Lawrence Livermore National Laboratory - July 2013 July 2013 Review of Preparedness for Severe Natural Phenomena Events at the Lawrence Livermore National Laboratory The Office of Enforcement and Oversight (Independent Oversight), within the Office of Health, Safety and Security (HSS), conducted an independent review of the National Nuclear Security Administration (NNSA) Livermore Field Office (LFO) and Lawrence Livermore National Laboratory (LLNL) Site 200 preparedness for severe natural phenomena events (NPEs). The HSS Office of Safety and Emergency Management Evaluations performed this review to evaluate the processes for identifying emergency response capabilities and maintaining them in a state of readiness in case of a severe NPE. This

313

Lawrence Livermore National Laboratory: Site Map  

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

Site Map Site Map About LLNL What we do How we do it Our Values Organization Management and Sponsors Publications History Organizations Global Security National Ignition Facility Operations Safety & Security Science & Technology Weapons & Complex Integration Visiting LLNL Maps & Directions Badging Discovery Center Site Tours Current Weather Protocol Office Where to stay Tri-Valley Visitors Bureau City of Livermore News News Center For Reporters Social Media & Multimedia Publication Science and Technology Review Lab Report News Releases Around the Lab Community Discovery Center Site Tours Community giving Corporate giving Environmental information Community Center Contacts Discover LLNL Newsletter Volunteer Opportunities Education Internships Postdocs K - 12 Outreach Site Tours School Tours

314

EIS-0133: Decontamination and Waste Treatment Facility for the Lawrence Livermore National Laboratory Livermore, California  

Broader source: Energy.gov [DOE]

The U.S. Department of Energys San Francisco Operations Office developed this statement to analyze the potential environmental and socioeconomic impacts of alternatives for constructing and operating a Decontamination and Waste Treatment Facility for nonradioactive (hazardous and nonhazardous) mixed and radioactive wastes at Lawrence Livermore National Laboratory.

315

Enforcement Letter, Lawrence Livermore National Laboratory - June 2, 2005 |  

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

June June 2, 2005 Enforcement Letter, Lawrence Livermore National Laboratory - June 2, 2005 June 2, 2005 Enforcement Letter Issued to Lawrence Livermore National Laboratory for Quality Assurance Deficiencies related to Weapon Activities, June 2, 2005 This letter is to inform you of the Department of Energy's (DOE) concern regarding several quality assurance-related deficiencies involving actions by Lawrence Livermore National Laboratory (LLNL) personnel. These deficiencies were associated with a cracked explosive event that occurred at the Pantex site in January 2004. The timing of this letter is intended to coincide with a DOE enforcement action stemming from this event. Enforcement Letter, Lawrence Livermore National Laboratory - June 2, 2005 More Documents & Publications

316

Enforcement Letter, Lawrence Livermore National Laboratory - June 2, 2005 |  

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

June June 2, 2005 Enforcement Letter, Lawrence Livermore National Laboratory - June 2, 2005 June 2, 2005 Enforcement Letter Issued to Lawrence Livermore National Laboratory for Quality Assurance Deficiencies related to Weapon Activities, June 2, 2005 This letter is to inform you of the Department of Energy's (DOE) concern regarding several quality assurance-related deficiencies involving actions by Lawrence Livermore National Laboratory (LLNL) personnel. These deficiencies were associated with a cracked explosive event that occurred at the Pantex site in January 2004. The timing of this letter is intended to coincide with a DOE enforcement action stemming from this event. Enforcement Letter, Lawrence Livermore National Laboratory - June 2, 2005 More Documents & Publications

317

Director of Lawrence Livermore National Laboratory to Step Down...  

National Nuclear Security Administration (NNSA)

Livermore, one of the Energy Department's national defense laboratories, through a transition to a post-Cold War world and helped carry out the NNSA's stockpile stewardship...

318

Concurrence' Lawrence Livermore National Laboratory FY2015 Ten...  

National Nuclear Security Administration (NNSA)

manufacturing * Special nuclear materials-plutonium and tritium * High performance computing FY2015 Ten Year Site Plan Limited Report Page 3 of 6 Lawrence Livermore...

319

FY 2011 Lawrence Livermore National Security, LLC, PER Summary...  

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

Lawrence Livermore National Security, LLC, PER Summary | National Nuclear Security Administration Facebook Twitter Youtube Flickr RSS People Mission Managing the Stockpile...

320

Sandia National Laboratories: Working at the Livermore Valley...  

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

Computing Innovation Center Anchored by a history of leadership in computing, Lawrence Livermore has led development of the new High Performance Computing Innovation...

Note: This page contains sample records for the topic "livermore ia ia" 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

Dr. Cook to Livermore: The Future is Bright | National Nuclear...  

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

equation of state, X-ray scattering and compression of diamond; Livermore's leadership in additive manufacturing; and the current environment in Washington. D.C. He offered both...

322

Site Visit Report, Lawrence Livermore National Laboratory - May...  

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

National Laboratory - May 2010 May 2010 Review of Lawrence Livermore National Laboratory Fire Protection Design Review Process This site visit report documents the results of the...

323

Independent Oversight Review of the Lawrence Livermore National...  

Energy Savers [EERE]

Laboratory's health services and to conduct an Accreditation Association of Ambulatory Health Care accreditation survey. Independent Oversight Review of the Lawrence Livermore...

324

Lawrence Livermore National Laboratory Environmental Report 2010  

SciTech Connect (OSTI)

The purposes of the Lawrence Livermore National Laboratory Environmental Report 2010 are to record Lawrence Livermore National Laboratory's (LLNL's) compliance with environmental standards and requirements, describe LLNL's environmental protection and remediation programs, and present the results of environmental monitoring at the two LLNL sites - the Livermore site and Site 300. The report is prepared for the U.S. Department of Energy (DOE) by LLNL's Environmental Protection Department. Submittal of the report satisfies requirements under DOE Order 231.1A, Environmental Safety and Health Reporting, and DOE Order 5400.5, Radiation Protection of the Public and Environment. The report is distributed electronically and is available at https://saer.llnl.gov/, the website for the LLNL annual environmental report. Previous LLNL annual environmental reports beginning in 1994 are also on the website. Some references in the electronic report text are underlined, which indicates that they are clickable links. Clicking on one of these links will open the related document, data workbook, or website that it refers to. The report begins with an executive summary, which provides the purpose of the report and an overview of LLNL's compliance and monitoring results. The first three chapters provide background information: Chapter 1 is an overview of the location, meteorology, and hydrogeology of the two LLNL sites; Chapter 2 is a summary of LLNL's compliance with environmental regulations; and Chapter 3 is a description of LLNL's environmental programs with an emphasis on the Environmental Management System including pollution prevention. The majority of the report covers LLNL's environmental monitoring programs and monitoring data for 2010: effluent and ambient air (Chapter 4); waters, including wastewater, storm water runoff, surface water, rain, and groundwater (Chapter 5); and terrestrial, including soil, sediment, vegetation, foodstuff, ambient radiation, and special status wildlife and plants (Chapter 6). Complete monitoring data, which are summarized in the body of the report, are provided in Appendix A. The remaining three chapters discuss the radiological impact on the public from LLNL operations (Chapter 7), LLNL's groundwater remediation program (Chapter 8), and quality assurance for the environmental monitoring programs (Chapter 9). The report uses System International units, consistent with the federal Metric Conversion Act of 1975 and Executive Order 12770, Metric Usage in Federal Government Programs (1991). For ease of comparison to environmental reports issued prior to 1991, dose values and many radiological measurements are given in both metric and U.S. customary units. A conversion table is provided in the glossary.

Jones, H E; Bertoldo, N A; Campbell, C G; Cerruti, S J; Coty, J D; Dibley, V R; Doman, J L; Grayson, A R; MacQueen, D H; Wegrecki, A M; Armstrong, D H; Brigdon, S L; Heidecker, K R; Hollister, R K; Khan, H N; Lee, G S; Nelson, J C; Paterson, L E; Salvo, V J; Schwartz, W W; Terusaki, S H; Wilson, K R; Woods, J M; Yimbo, P O; Gallegos, G M; Terrill, A A; Revelli, M A; Rosene, C A; Blake, R G; Woollett, J S; Kumamoto, G

2011-09-14T23:59:59.000Z

325

The University of Iowa College of Engineering Engineering Professional  

E-Print Network [OSTI]

Clipper Windpower Cedar Rapids, IA CNH Burlington, IA Crystal Group Hiawatha, IA DENSO International

Casavant, Tom

326

Lawrence Livermore National Laboratory: News Center Distribution  

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

News > News > News Center > Receive News Releases Receive News Releases Journalists: To receive information about activities at Lawrence Livermore National Laboratory, please complete the form below. The form may also be used to submit changes in your contact information or to remove yourself from the list. If you have any questions, please contact Media Relations at (925) 422-4599 or send an e-mail message to Kirsten Sprott. Type of Request: New Addition to News Media List Change Information Delete Information Your Name Title E-Mail Address Preferred E-Mail Address Direct Business Phone Number (with area code) Business Fax Number (with area code) News Organization Street Address City State Country Zip Code f815eee8931dfda40651bfb5302ac9a7 1389471929 Type of News Services You Use:

327

Lawrence Livermore National Laboratory: Social Media  

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

Social Media Social Media By staying on the cutting edge of Web communication, the News Center at LLNL reaches out to the media and the public through a variety of social media and multimedia Websites: Flickr An image- and video-hosting Website. Visit now and view the LLNL photostream in a variety of formats. Twitter A microblogging service. Sign up today and get short, tiimely messages about the Livermore Lab. Facebook A social-networking Website with more than 500 million active users. Enlist now to become a "friend" of LLNL. RSS A Web-feed service that sends content to subscribers automatically. Enroll at once to get the latest LLNL headlines. Utube A video-sharing Website. Navigate here to immediately watch the latest in cutting-edge science and technology at the Laboratory.

328

Dr. Yuan Ping Lawrence Livermore National Lab  

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

Creating, diagnosing and Creating, diagnosing and controlling high-energy- density matter with lasers Dr. Yuan Ping Lawrence Livermore National Lab Tuesday, Oct 22, 2013 - 3:00PM MBG AUDITORIUM Refreshments at 2:45PM The PrinceTon Plasma Physics laboraTory is a U.s. DeParTmenT of energy faciliTy Since their invention in 1960's, lasers with power spanning from Kilo- Watt to PetaWatt have been widely used in almost every branch of sci- ence, leading to numerous discoveries and novel techniques. At present, lasers are capable of creating extreme states of matter in a laboratory, at conditions resembling those most extreme in the Universe: they heat matter up to the temperatures inside stars, they create electric field and

329

Technical Qualification Program Self-Assessment Report - Livermore Field  

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

Technical Qualification Program Self-Assessment Report - Livermore Technical Qualification Program Self-Assessment Report - Livermore Field Office Technical Qualification Program Self-Assessment Report - Livermore Field Office The purpose of the Livermore Field Office (LFO) Teclmical Qualification Program (TQP) is to ensure that federal teclmical personnel with safety oversight responsibilities at defense nuclear facilities at Lawrence Livermore National Laboratory possess competence commensurate with responsibilities. LFO is committed to ensuring it has the necessary teclmical capabilities to provide the kind of management, direction, and guidance essential to safe operation ofDOE's defense nuclear facilities. LFO TQP Self-Assessment, May 2013 More Documents & Publications Technical Qualification Program Self-Assessment Report - Pacific Northwest

330

Lawrence Livermore to build advanced laser system in Czech Republic  

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

9-06 9-06 For immediate release: 09/17/2013 | NR-13-09-06 High Resolution Image The High Repetition-Rate Advanced Petawatt Laser System, or HAPLS, will be designed, developed, assembled and tested at Lawrence Livermore. It will be transferred to the ELI Beamlines facility in 2016, where it will be commissioned for use by the international scientific community. Lawrence Livermore to build advanced laser system in Czech Republic Breanna Bishop, LLNL, (925) 423-9802, bishop33@llnl.gov High Resolution Image Artist renderings of the ELI Beamlines facility, currently under construction in the Czech Republic. High Resolution Image A CAD image of the ELI-HAPLS laser. LIVERMORE, Calif. - Lawrence Livermore National Laboratory (LLNL), through Lawrence Livermore National Security LLC (LLNS), has been awarded more than

331

Preliminary Notice of Violation, Lawrence Livermore National Laboratory -  

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

1 1 Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-98-01 March 9, 1998 Preliminary Notice of Violation issued to University of California related to the Unplanned Personnel Contaminations and Radioactive Material Intakes at the Hazardous Waste Management Facilities at the Lawrence Livermore National Laboratory, (EA-98-01) This letter refers to the Department of Energy's (DOE) evaluation of the facts and circumstances surrounding the unplanned personnel contaminations/intakes at [a building] of Lawrence Livermore National Laboratory's (LLNL) Hazardous Waste Management Facilities on July 2, 1997. Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-98-01 More Documents & Publications Preliminary Notice of Violation, Lawrence Livermore National Laboratory -

332

Site Visit Report, Livermore Site Office - February 2011 | Department of  

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

Site Visit Report, Livermore Site Office - February 2011 Site Visit Report, Livermore Site Office - February 2011 Site Visit Report, Livermore Site Office - February 2011 February 2011 Livermore Site Office Safety Basis Self-Assessment This site visit report documents the collective results of the Office of Health, Safety and Security's (HSS) assessment of National Nuclear Safety Administration (NNSA) Livermore Site Office (LSO) safety basis processes and discusses its scope, objective, results and conclusions. Appendix A provides lists of the documents, interviews, and observations and Appendix B includes the plan for the review. The assessment was sponsored by LSO as a self-assessment and conducted jointly by HSS and LSO staff. It was completed in late 2010 and included site visits from November 29 - December

333

Independent Oversight Review of the Lawrence Livermore National Laboratory  

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

Review of the Lawrence Livermore National Review of the Lawrence Livermore National Laboratory - March 2001 Independent Oversight Review of the Lawrence Livermore National Laboratory - March 2001 March 2001 Review of the Lawrence Livermore National Laboratory Health Services Department The Office of Environment, Safety, and Health (ES&H) Oversight (EH-2) in conjunction with the Accreditation Association of Ambulatory Health Care (AAAHC) reviewed the Lawrence Livermore National Laboratory (LLNL) Health Services Department on March 19-21, 2001. The purpose of the review was twofold. First, EH-2 performed a review of selected activities to identify positive attributes, issues, and opportunities for improvement. Second, the AAAHC surveyed the medical program for accreditation. This report documents

334

J.G. Tobin and S.-W. Yu Lawrence Livermore National Laboratory, Livermore, CA, USA  

National Nuclear Security Administration (NNSA)

Differentiation of 5f and 6d Components Differentiation of 5f and 6d Components in the Unoccupied Electronic Structure of UO 2 J.G. Tobin and S.-W. Yu Lawrence Livermore National Laboratory, Livermore, CA, USA Summary: One of the crucial questions of all actinide electronic structure determinations is the issue of 5f versus 6d character and the distribution of these components across the density of states. Here, two break-though experiments will be discussed, which have allowed the direct determination of the U5f and U6d contributions to the unoccupied density of states (UDOS) in Uranium Dioxide (UO 2 ). [1] First, a combined soft X-ray Absorption and Bremstrahlung Isochromat Spectroscopy (XAS and BIS, respectively) study of UO 2 will be discussed. [2] Second, a novel Resonant Inverse Photoelectron and X-ray Emission Spectroscopy (RIPES and

335

Lesson Learned by Lawrence Livermore National Laboratory Activity-level Work Planning and Control  

Broader source: Energy.gov [DOE]

Slide Presentation by Donna J. Governor, Lawrence Livermore National Laboratory. Lessons Learned by Lawrence Livermore National Laboratory Activity-Level Work Planning & Control.

336

Performance of Work for a Non-Department Entity at Lawrence Livermore...  

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

at Lawrence Livermore National Laboratory INS-O-14-01 January 2014 Department of Energy Washington, DC 20585 January 29, 2014 MEMORANDUM FOR THE MANAGER, LIVERMORE FIELD...

337

Consent Order, Lawrence Livermore National National Security, LLC- WCO-2010-01  

Broader source: Energy.gov [DOE]

Issued to Lawrence Livermore National Security, LLC for deficiencies associated with the Lawrence Livermore National Laboratory Chronic Beryllium Disease Prevention Program

338

Enforcement Letter, Lawrence Livermore National Laboratory - November 5,  

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

November 5, 1999 Enforcement Letter, Lawrence Livermore National Laboratory - November 5, 1999 November 5, 1999 Issued to Lawrence Livermore National Laboratory related to Authorization Basis Issues This letter refers to the Department of Energy's (DOE) evaluation of the facts and circumstances concerning issues related to the maintenance and adherence to documents which form the authorization basis for Lawrence Livermore National Laboratory (LLNL) operated nuclear facilities. Specifically, three Noncompliance Tracking System (NTS) reports were submitted over a four-day period and are summarized below: On July 30, 1999, it was reported that two cabinets contained about [specified amount] of [ ] solvents in violation of the building Safety Analysis Documentation;

339

Enforcement Letter, Lawrence Livermore National Laboratory - November 5,  

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

November 5, 1999 Enforcement Letter, Lawrence Livermore National Laboratory - November 5, 1999 November 5, 1999 Issued to Lawrence Livermore National Laboratory related to Authorization Basis Issues This letter refers to the Department of Energy's (DOE) evaluation of the facts and circumstances concerning issues related to the maintenance and adherence to documents which form the authorization basis for Lawrence Livermore National Laboratory (LLNL) operated nuclear facilities. Specifically, three Noncompliance Tracking System (NTS) reports were submitted over a four-day period and are summarized below: On July 30, 1999, it was reported that two cabinets contained about [specified amount] of [ ] solvents in violation of the building Safety Analysis Documentation;

340

Enforcement Letter, Lawrence Livermore National Laboratory - August 22,  

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

August August 22, 1996 Enforcement Letter, Lawrence Livermore National Laboratory - August 22, 1996 August 22, 1996 Issued to the University of California related to Radiological Worker Training Deficiencies at the Lawrence Livermore National Laboratory This letter refers to the Department of Energy's (DOE) evaluation of Lawrence Livermore National Laboratory's (LLNL) report of a potential noncompliance with the requirements of 10 CFR 835 (Occupational Radiation Protection). This potential noncompliance involved the failure to complete required radiological worker retraining for 49 percent of LLNL's approximately 700 radiological workers. The training issue was initially identified on May 6, 1996, by LLNL during a routine review of the Chemistry and Materials Science deficiency

Note: This page contains sample records for the topic "livermore ia ia" 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

Director of the National Ignition Facility, Lawrence Livermore National  

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

Director of the National Ignition Facility, Lawrence Livermore National Director of the National Ignition Facility, Lawrence Livermore National Laboratory | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > About Us > Who We Are > In The Spotlight > Edward Moses Director of the National Ignition Facility, Lawrence Livermore National Laboratory

342

Retired lab physicist and computational pioneer, Lawrence Livermore  

National Nuclear Security Administration (NNSA)

Retired lab physicist and computational pioneer, Lawrence Livermore Retired lab physicist and computational pioneer, Lawrence Livermore National Laboratory | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > About Us > Who We Are > In The Spotlight > Berni Alder Retired lab physicist and computational pioneer, Lawrence Livermore National Laboratory

343

Associate director for Physical and Life Sciences, Lawrence Livermore  

National Nuclear Security Administration (NNSA)

Associate director for Physical and Life Sciences, Lawrence Livermore Associate director for Physical and Life Sciences, Lawrence Livermore National Laboratory | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > About Us > Who We Are > In The Spotlight > William Goldstein Associate director for Physical and Life Sciences, Lawrence Livermore

344

FY 2012 Lawrence Livermore National Security, LLC, PEP | National Nuclear  

National Nuclear Security Administration (NNSA)

PEP | National Nuclear PEP | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog FY 2012 Lawrence Livermore National Security, LLC, PEP Home > About Us > Our Operations > Acquisition and Project Management > Performance Evaluations > FY 2012 Lawrence Livermore National Security, LLC, PEP FY 2012 Lawrence Livermore National Security, LLC, PEP

345

Lawrence Livermore Site Office Manager Joins EM's Senior Leadership Team  

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

Lawrence Livermore Site Office Manager Joins EM's Senior Lawrence Livermore Site Office Manager Joins EM's Senior Leadership Team Lawrence Livermore Site Office Manager Joins EM's Senior Leadership Team November 9, 2011 - 12:00pm Addthis WASHINGTON, D.C. - EM Acting Assistant Secretary Dave Huizenga announced today that Alice Williams, manager of the DOE National Nuclear Security Administration (NNSA) Lawrence Livermore Site Office has joined the EM senior leadership team. "I am very excited to have Alice join EM Principal Deputy Assistant Secretary Tracy Mustin and I as we continue work toward the achievement of the EM vision and the continuing evolution of an EM organization that is focused on delivery of mission success to meet the nation's needs in the 21st century," Huizenga said. In ensuing months, Williams will work closely with Huizenga and Mustin as

346

Cold cases heat up through Lawrence Livermore approach to identifying  

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

10-03 10-03 For immediate release: 10/10/2012 | NR-12-10-03 Cold cases heat up through Lawrence Livermore approach to identifying remains Anne M Stark, LLNL, (925) 422-9799, stark8@llnl.gov Printer-friendly Bruce Buchholz loads a sample in the accelerator. High Resolution Image LIVERMORE, Calif. -- In an effort to identify the thousands of John/Jane Doe cold cases in the United States, a Lawrence Livermore National Laboratory researcher and a team of international collaborators have found a multidisciplinary approach to identifying the remains of missing persons. Using "bomb pulse" radiocarbon analysis developed at Lawrence Livermore, combined with recently developed anthropological analysis and forensic DNA techniques, the researchers were able to identify the remains of a missing

347

Boralex Beaver Livermore Falls Biomass Facility | Open Energy Information  

Open Energy Info (EERE)

Livermore Falls Biomass Facility Livermore Falls Biomass Facility Jump to: navigation, search Name Boralex Beaver Livermore Falls Biomass Facility Facility Boralex Beaver Livermore Falls Sector Biomass Location Androscoggin County, Maine Coordinates 44.1912416°, -70.1707037° 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":44.1912416,"lon":-70.1707037,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

348

Lawrence Livermore National Security Enforcement Letter (NEL-2013-03)  

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

Penrose C. Albright Penrose C. Albright Department of Energy Washington, DC 20585 July 22, 2013 President and Laboratory Director Lawrence Livermore National Security, LLC Lawrence Livermore National Laboratory 7000 East Avenue Livermore, California 94550 NEL-2013-03 Dear Dr. Albright: The Office of Health, Safety and Security's Office of Enforcement and Oversight has evaluated the facts and circumstances surrounding programmatic deficiencies identified in the Lawrence Livermore National Security, LLC (LLNS) software quality assurance (SQA) program. LLNS reported these deficiencies on January 16, 2013, in Noncompliance Tracking System (NTS) report NTS--LSO-LLNL-LLNL- 2013-0001, LLNL Software Quality Assurance Program Does Not Meet DOE 0 414.1 D Standards and Procedures Requirements.

349

2012 Annual Workforce Analysis and Staffing Plan Report - Livermore  

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

6.W~~l 6.W~~l #II VA. 'lf,fi:'¥Ylj Nsffonal Nuclear Security Admfnfat111tlon Department of Energy National Nuclear Security Administration Livermore Site Office PO Box 808, L-293 7000 East Avenue Livermore, California 94551-0808 !JAN 18 2013 3250 COR-M0-1/17/2013-490077 MEMORANDUM FOR KAREN L. BOARDMAN CHAIRPERSON FEDERAL TECHNICAL CAPABILITY PANEL FROM: v KIMBERLY DAVIS LEBAK "/'JJ. f /ti/ MANAGER ~ ..--r; tV[ SUBJECT: REFRENCE: Workforce Analysis and Staffing Plan Report for the Livermore Field Office 2012, Revision I Memorandum (K. Boardman/Distribution), Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2012, dated October 24, 2012 Please see the attached revised Workforce Analysis and Staffing Plan Report for the Livermore

350

FY 2009 Lawrence Livermore National Security, LLC, PER Summary | National  

National Nuclear Security Administration (NNSA)

Lawrence Livermore National Security, LLC, PER Summary | National Lawrence Livermore National Security, LLC, PER Summary | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog FY 2009 Lawrence Livermore National Security, LLC, PER Summary Home > About Us > Our Operations > Acquisition and Project Management > Performance Evaluations > FY 2009 Lawrence Livermore National Security,

351

Livermore Site Office Facility Representative Program Self-Assessment  

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

ARPT-LSO-2011-001 ARPT-LSO-2011-001 Site: Livermore Site Office Subject: Office of Independent Oversight's Office of Environment, Safety and Health Evaluations Activity Report for the Livermore Site Office Facility Representative Program Self-Assessment Dates of Activity 01/24/2011 - 01/28/2011 Report Preparer Robert Freeman Activity Description/Purpose: This activity report documents the results of the Office of Health, Safety and Security's (HSS) review of and participation in the Livermore Site Office Self-Assessment of the Facility Representative (FR) Program. This self-assessment was led by the U.S. Department of Energy (DOE) Livermore Site Office (LSO) and conducted by LSO staff, HSS staff, National Nuclear Security Administration (NNSA) Office of the Chief of Defense Nuclear Safety (CDNS) staff, a peer from Los Alamos Site

352

Preliminary Notice of Violation, Lawrence Livermore National Laboratory -  

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

3-04 3-04 Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-2003-04 September 3, 2003 Preliminary Notice of Violation issued to the University of California related to an Extremity Radiological Overexposure at the Lawrence Livermore National Laboratory, (EA-2003-04) This letter refers to the recent investigation by the Department of Energy's Office of Price-Anderson Enforcement (OE) of the June 2002 extremity radiological overexposure event. Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-2003-04 More Documents & Publications Preliminary Notice of Violation, University of California - EA-2006-01 Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-98-06 Independent Oversight Inspection of Environment, Safety, and Health

353

Independent Activity Report, Lawrence Livermore National Laboratory - March  

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

March 2011 March 2011 Independent Activity Report, Lawrence Livermore National Laboratory - March 2011 March 2011 Lawrence Livermore National Laboratory Chronic Beryllium Disease Prevention Program Effectiveness Review [HIAR-LLNL-2011-03-25] The Lawrence Livermore National Laboratory (LLNL) and the Livermore Site Office (LSO) chartered a team to conduct an effectiveness review of the issues identified with the LLNL Chronic Beryllium Disease Prevention Program (CBDPP). The team included members and observers from LLNL, LSO, the National Nuclear Security Administration (NNSA), and the Office of Health, Safety and Security (HSS). The team's final report documents the results of the effectiveness review and the actions taken by LLNL to resolve and prevent recurrence of 44

354

Four Lawrence Livermore researchers named 2013 APS Fellows  

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

6 6 For immediate release: 12/23/2013 | NR-13-12-06 Four Lawrence Livermore National Laboratory scientists have been selected as 2013 fellows of the American Physical Society (APS). They include, from left: Charles Cerjan, Ian Thompson, Eric Schwegler and Marilyn Schneider. Four Lawrence Livermore researchers named 2013 APS Fellows Breanna Bishop, LLNL, (925) 423-9802, bishop33@llnl.gov LIVERMORE, Calif. - Four Lawrence Livermore National Laboratory scientists have been selected as 2013 fellows of the American Physical Society (APS). Physicist Charles Cerjan was cited by the Division of Atomic, Molecular and Optical Physics for "seminal contributions to time-dependent Schrodinger equation propagation algorithms and their application to particle scattering and intense field dynamics, the development of laser-produced

355

NSO PAC 4 Meeting Agenda Lawrence Livermore National Laboratory  

E-Print Network [OSTI]

NSO PAC 4 Meeting Agenda Lawrence Livermore National Laboratory Summit Room in Bldg 132 Thursday of NIF 7:00 pm Adjourn for Dinner Friday, November 30, 2001 8:00 am Preparation of Report 10:15 am Break

356

Science on Saturday @ Lawrence Livermore Lab | Department of...  

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

16, 2013 2:30PM EST Bankhead Theatre in downtown Livermore, CA Science on Saturday. Science on Saturday (SOS) is a series of science lectures for middle and high school students....

357

Science on Saturday @ Lawrence Livermore Lab | Department of...  

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

2, 2013 1:30PM EST Bankhead Theatre, downtown Livermore CA Science on Saturday. Science on Saturday (SOS) is a series of science lectures for middle and high school students. Each...

358

Science on Saturday @ Lawrence Livermore Lab | Department of...  

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

23, 2013 2:30PM EST Bankhead Theatre in downtown Livermore CA Science on Saturday. Science on Saturday (SOS) is a series of science lectures for middle and high school students....

359

Livermore Scientists Team with Russia to Discover Element 118  

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

"Synthesis of the isotopes of elements 118 and 116" (Abstract) "Synthesis of the isotopes of elements 118 and 116" (Abstract) Physical Review C, October 9, 2006 Livermore Scientists Team With Russia To Discover Elements 113 and 115 LLNL News Release, February. 2, 2004 "Present at the Creation" Science & Technology Review, January/February 2002 Island of Stability NOVA Science Now, September 2006 Social Media Logos Follow LLNL on YouTube Subscribe to LLNL's RSS feed Follow LLNL on Facebook Follow LLNL on Twitter Follow LLNL on Flickr Contact: Anne M. Stark Phone: (925) 422-9799 E-mail: stark8l@llnl.gov FOR IMMEDIATE RELEASE October 16, 2006 NR-06-10-03 Livermore scientists team with Russia to discover element 118 LIVERMORE, Calif. - Scientists from the Chemistry, Materials and Life Sciences Directorate at Lawrence Livermore National Laboratory, in

360

Preliminary Notice of Violation, Lawrence Livermore National Security, LLC- September 25, 2014  

Broader source: Energy.gov [DOE]

Worker Safety and Health Enforcement Preliminary Notice of Violation issued to Lawrence Livermore National Security, LLC

Note: This page contains sample records for the topic "livermore ia ia" 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

Independent Oversight Inspection, Lawrence Livermore National Laboratory, Volume I- December 2004  

Broader source: Energy.gov [DOE]

Inspection of Environment, Safety, and Health Management at the Lawrence Livermore National Laboratory

362

Independent Oversight Inspection, Lawrence Livermore National Laboratory, Summary Report- July 2002  

Broader source: Energy.gov [DOE]

Inspection of Environment, Safety, and Health and Emergency Management at the Lawrence Livermore National Laboratory

363

Environmental Impact Statement and Environmental Impact Report for Continued Operation of Lawrence Livermore National Laboratory and Sandia National Laboratories, Livermore  

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

Laborat... Laborat... file:///I|/Data%20Migration%20Task/EIS-0157-FEIS-03-1992/05eis0157_f.html[6/27/2011 9:57:50 AM] APPENDIX F ECOLOGY AND BIOLOGICAL ASSESSMENT This appendix contains two major sections. Section F.1 is a discussion of the ecological characteristics at the LLNL Livermore site, LLNL Site 300, and SNL, Livermore (referred to collectively as the study sites); and presents information and data on the flora and fauna in the upland areas (see Appendix G for a detailed analysis of wetlands at the study sites). This section focuses on the biological features of LLNL Site 300 because this 7000-acre site is largely undeveloped and represents the most biologically diverse area under study. In contrast, the LLNL Livermore site and SNL, Livermore are developed areas that provide only marginal wildlife habitat because of the high degree of human activity and the few

364

Lawrence Livermore National Laboratory Site Lead Planning Activities, October 2012  

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

Report Number: HIAR LLNL-2012-10-23 Site: Lawrence Livermore National Laboratory Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for Site Lead Planning Activities at the Lawrence Livermore National Laboratory Dates of Activity 10/23/2012 - 10/24/2012 Report Preparer: Robert Freeman Activity Description/Purpose: The purpose of this Office of Health, Safety and Security (HSS) Independent Oversight activity was to maintain site operational awareness of key nuclear safety performance areas, monitor ongoing site oversight and planning activities for Lawrence Livermore National Laboratory (LLNL) nuclear facilities, and identify and initiate coordination of future HSS oversight activities at the site, including planned HSS targeted reviews planned for Fiscal Year (FY) 2013.

365

California utilities partner with Lawrence Livermore to improve state's  

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

2-12-04 2-12-04 For immediate release: 12/20/2012 | NR-12-12-04 California utilities partner with Lawrence Livermore to improve state's energy grid Lynda L Seaver, LLNL, (925) 423-3103, seaver1@llnl.gov Printer-friendly California utilities will use the advanced technologies and expertise of Lawrence Livermore National Laboratory to improve the efficiency, security and safety of the state's utility systems under an agreement approved today by the California Public Utilities Commission (CPUC). The CPUC approved funding of a five-year research and development agreement between Pacific Gas and Electric Company, Southern California Edison Company and San Diego Gas and Electric Company, and Lawrence Livermore (LLNL) that will provide the utilities with access to LLNL technological

366

Lawrence Livermore and Rensselaer Polytechnic Institute scientists set a  

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

6 6 For immediate release: 04/30/2013 | NR-13-04-06 Lawrence Livermore and Rensselaer Polytechnic Institute scientists set a new simulation speed record on the Sequoia supercomputer Donald B Johnston, LLNL, (925) 423-4902, johnston19@llnl.gov Printer-friendly Lawrence Livermore scientists, from left, David Jefferson and Peter Barnes. Photo by Laura Schulz and Meg Epperly/LLNL High Resolution Image Computer scientists at Lawrence Livermore National Laboratory (LLNL) and Rensselaer Polytechnic Institute have set a high performance computing speed record that opens the way to the scientific exploration of complex planetary-scale systems. In a paper to be published in May, the joint team will announce a record-breaking simulation speed of 504 billion events per second on LLNL's

367

Preliminary Notice of Violation, Lawrence Livermore National Laboratory -  

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

6 6 Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-98-06 July 28, 1998 Preliminary Notice of Violation issued to the University of California related to Criticality Safety and the Quality Assurance Program at the Lawrence Livermore National Laboratory, July 28, 1998 (EA-98-06) This letter refers to the Department of Energy's (DOE) evaluation of the facts and circumstances surrounding a series of criticality safety infractions occurring between May and December 1997 in [a building] at the Lawrence Livermore National Laboratory (LLNL). [The building] is the central repository used to process and store [radioactive material]. During the period May 20 through July 15, 1997, Certified [Radioactive Material] Handlers violated criticality safety procedures for mass limits and form

368

Lawrence Livermore National Laboratory Site Lead Planning Activities, October 2012  

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

Report Number: HIAR LLNL-2012-10-23 Site: Lawrence Livermore National Laboratory Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for Site Lead Planning Activities at the Lawrence Livermore National Laboratory Dates of Activity 10/23/2012 - 10/24/2012 Report Preparer: Robert Freeman Activity Description/Purpose: The purpose of this Office of Health, Safety and Security (HSS) Independent Oversight activity was to maintain site operational awareness of key nuclear safety performance areas, monitor ongoing site oversight and planning activities for Lawrence Livermore National Laboratory (LLNL) nuclear facilities, and identify and initiate coordination of future HSS oversight activities at the site, including planned HSS targeted reviews planned for Fiscal Year (FY) 2013.

369

Energy Innovations from Livermore Lab to Power Hawaiian Nonprofit |  

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

Innovations from Livermore Lab to Power Hawaiian Nonprofit Innovations from Livermore Lab to Power Hawaiian Nonprofit Energy Innovations from Livermore Lab to Power Hawaiian Nonprofit February 28, 2011 - 11:31am Addthis Mike Gleason (second from left), president and CEO of The Arc of Hilo. Also shown, from left: Annemarie Meike, Mark Sueksdorf, Marjorie Gonzalez and Larry Ferderber | Photo Courtesy of LLNL Mike Gleason (second from left), president and CEO of The Arc of Hilo. Also shown, from left: Annemarie Meike, Mark Sueksdorf, Marjorie Gonzalez and Larry Ferderber | Photo Courtesy of LLNL April Saylor April Saylor Former Digital Outreach Strategist, Office of Public Affairs What are the key facts? LLNL technologies will reduce the plant's electrical bills by 50 percent and provide sustainable and energy efficient solutions for the

370

FY 2012 Lawrence Livermore National Security, LLC, PER Summary | National  

National Nuclear Security Administration (NNSA)

PER Summary | National PER Summary | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog FY 2012 Lawrence Livermore National Security, LLC, PER Summary Home > About Us > Our Operations > Acquisition and Project Management > Performance Evaluations > FY 2012 Lawrence Livermore National Security, LLC, ...

371

Technical Safety Appraisal of the Lawrence Livermore National Laboratory  

SciTech Connect (OSTI)

This report documents the results of the Technical Safety Appraisal (TSA) of the Lawrence Livermore National Laboratory (LLNL) (including the Site 300 area), Livermore, California, conducted from February 26 to April 5, 1990. The purpose of the assessment was to provide the Secretary of Energy with the status of Environment, Safety and Health (ES H) Programs at LLNL. LLNL is operated by the University of California for the Department of Energy (DOE), and is a multi-program, mission-oriented institution engaged in fundamental and applied research programs that require a multidisciplinary approach. 1 fig.

Not Available

1990-12-01T23:59:59.000Z

372

Environmental Impact Statement and Environmental Impact Report for Continued Operation of Lawrence Livermore National Laboratory and Sandia National Laboratories, Livermore  

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

2-1992/01eis0157_a.html[6/27/2011 9:53:34 AM] 2-1992/01eis0157_a.html[6/27/2011 9:53:34 AM] APPENDIX A DESCRIPTION OF MAJOR PROGRAMS AND FACILITIES Appendix A describes the programs, infrastructures, facilities, and future plans of Lawrence Livermore National Laboratory (LLNL) and the Sandia National Laboratories at Livermore (SNL, Livermore). It provides information on existing activities and facilities, as well as information on those activities anticipated to occur or facilities to be constructed over the next 5 to 10 years. The purpose of this appendix is to: present information that can be used to evaluate the proposed action and other EIS/EIR alternatives, identify activities that are part of the proposed action, distinguish proposed action activities from no action alternative activities, and

373

Environmental Impact Statement and Environmental Impact Report for Continued Operation of Lawrence Livermore National Laboratory and Sandia National Laboratories, Livermore  

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

Summary-1992.html[6/24/2011 3:44:58 PM] Summary-1992.html[6/24/2011 3:44:58 PM] EXECUTIVE SUMMARY The U.S. Department of Energy (DOE) and the Regents of the University of California (UC) propose the continued operation, including near-term (within 5 to 10 years) proposed projects, of the Lawrence Livermore National Laboratory (LLNL). In addition, DOE proposes the continued operation, including near-term proposed projects, of Sandia National Laboratories, Livermore (SNL, Livermore). Continued operation plus proposed projects at the two Laboratories is needed so that the research and development missions established by Congress and the President can continue to be supported. As provided and encouraged by the National Environmental Policy Act (NEPA) and the California Environmental Quality Act (CEQA), DOE and UC have prepared this document as a joint Environmental Impact Statement (EIS) and

374

Review of the Lawrence Livermore National Laboratory Health Services Department  

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

Environment, Safety, and Health Environment, Safety, and Health Oversight Review of the Lawrence Livermore National Laboratory Health Services Department March 2001 Office of Environment, Safety and Health i TABLE OF CONTENTS Page ACRONYMS................................................................................................................. iii 1.0 INTRODUCTION.................................................................................................. 1 2.0 RESULTS .............................................................................................................. 2 3.0 CONCLUSIONS.................................................................................................... 4 APPENDIX A.................................................................................................................

375

Fact Sheet: Collaboration of Oak Ridge, Argonne, and Livermore (CORAL)  

Broader source: Energy.gov [DOE]

The Collaboration of Oak Ridge, Argonne, and Livermore (CORAL) is a joint procurement activity among three of the Department of Energys National Laboratories launched in 2014 to build state-of-the-art high-performance computing technologies that are essential for supporting U.S. national nuclear security and are key tools used for technology advancement and scientific discovery.

376

Timely delivery of LIFE Tom Anklam, Lawrence Livermore  

E-Print Network [OSTI]

Timely delivery of LIFE Tom Anklam, Lawrence Livermore National Laboratory October 19, 2011 LIFE_Royal_Society_9/7/11 6 LIFE Fusion Chamber is About the Same Scale as the NIF Target Chamber #12;LIFE Fusion Physics will be Demonstrated on the NIF #12;LIFE will use a modular laser architeccture #12;#12;#12;11 NIF

377

Technical Qualification Program Self-Assessment Report- Livermore Field Office- 2013  

Broader source: Energy.gov [DOE]

The purpose of the Livermore Field Office (LFO) Teclmical Qualification Program (TQP) is to ensure that federal teclmical personnel with safety oversight responsibilities at defense nuclear facilities at Lawrence Livermore National Laboratory possess competence commensurate with responsibilities.

378

Independent Oversight Inspection of Emergency Management at the Lawrence Livermore National Laboratory - Volume II  

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

Lawrence Livermore Lawrence Livermore National Laboratory Office of Independent Oversight and Performance Assurance Office of the Secretary of Energy July 2002 Volume II INDEPENDENT OVERSIGHT INSPECTION OF EMERGENCY MANAGEMENT AT THE LAWRENCE LIVERMORE NATIONAL LABORATORY Volume II July 2002 i INDEPENDENT OVERSIGHT INSPECTION OF EMERGENCY MANAGEMENT AT THE LAWRENCE LIVERMORE NATIONAL LABORATORY Volume II Table of Contents Acronyms ......................................................................................................................................... iii 1.0 Introduction ................................................................................................................................1 2.0 Results .......................................................................................................................................3

379

A phenomenological model of the current filamentation instability driven by cathode processes in the Livermore spheromak  

Science Journals Connector (OSTI)

The current density on the open field lines of the Livermore spheromak (SSPX) typically exceeds the saturation current...

D. D. Ryutov; R. H. Cohen; D. N. Hill

2003-07-01T23:59:59.000Z

380

Supplement analysis for continued operation of Lawrence Livermore National Laboratory and Sandia National Laboratories, Livermore. Volume 2: Comment response document  

SciTech Connect (OSTI)

The US Department of Energy (DOE), prepared a draft Supplement Analysis (SA) for Continued Operation of Lawrence Livermore National Laboratory (LLNL) and Sandia National Laboratories, Livermore (SNL-L), in accordance with DOE`s requirements for implementation of the National Environmental Policy Act of 1969 (NEPA) (10 Code of Federal Regulations [CFR] Part 1021.314). It considers whether the Final Environmental Impact Statement and Environmental Impact Report for Continued Operation of Lawrence Livermore National Laboratory and Sandia National Laboratories, Livermore (1992 EIS/EIR) should be supplement3ed, whether a new environmental impact statement (EIS) should be prepared, or no further NEPA documentation is required. The SA examines the current project and program plans and proposals for LLNL and SNL-L, operations to identify new or modified projects or operations or new information for the period from 1998 to 2002 that was not considered in the 1992 EIS/EIR. When such changes, modifications, and information are identified, they are examined to determine whether they could be considered substantial or significant in reference to the 1992 proposed action and the 1993 Record of Decision (ROD). DOE released the draft SA to the public to obtain stakeholder comments and to consider those comments in the preparation of the final SA. DOE distributed copies of the draft SA to those who were known to have an interest in LLNL or SNL-L activities in addition to those who requested a copy. In response to comments received, DOE prepared this Comment Response Document.

NONE

1999-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "livermore ia ia" 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

Final Revised Environmental Assessment for The Proposed Construction and Operation of a Biosafety Level 3 Facility at Lawrence Livermore National Laboratory, Livermore, California  

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

R R Final Revised Environmental Assessment for The Proposed Construction and Operation of a Biosafety Level 3 Facility at Lawrence Livermore National Laboratory, Livermore, California Issued: December 2002 Revised: January 2008 Department of Energy National Nuclear Security Administration Livermore Site Office This page intentionally left blank. FINAL Revised EA for the Proposed Construction and Operation of a Biosafety Level 3 Facility at LLNL ii FORWARD The National Nuclear Security Administration (NNSA) of the Department of Energy (DOE) has responsibility for national programs to reduce and counter threats from weapons of mass destruction including nuclear, chemical, and biological weapons (bioweapons). NNSA's bioscience work at Lawrence Livermore National Laboratory (LLNL) in support of these

382

It's only natural: Lawrence Livermore helps find link to  

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

1 1 For immediate release: 03/04/2013 | NR-13-03-01 It's only natural: Lawrence Livermore helps find link to arsenic-contaminated groundwater Anne M Stark, LLNL, (925) 422-9799, stark8@llnl.gov Printer-friendly Hand pump at a community well of a sampling site in Bangladesh. Human activities are not the primary cause of arsenic found in groundwater in Bangladesh. Instead, a team of researchers from Lawrence Livermore National Laboratory, Barnard College, Columbia University, University of Dhaka, Desert Research Institute and University of Tennessee found that the arsenic in groundwater in the region is part of a natural process that predates any recent human activity, such as intensive pumping. The results appear in the March 4 edition of the Proceedings of the

383

Public Affairs Office: Livermore Lab Physicist Dates Lifetime of Solar  

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

Dating the Solar System: Where Were You When the Solar System Was Being Formed? Dating the Solar System: Where Were You When the Solar System Was Being Formed? Chemistry & Materials Science Directorate, LLNL Chronology of the early Solar System from chondrule-bearing calcium-aluminium-rich inclusions Nature, April 21, 2005 Building Planets at PSI: The Origin of the Solar System Planetary Science Institute Social Media Logos Follow LLNL on YouTube Subscribe to LLNL's RSS feed Follow LLNL on Facebook Follow LLNL on Twitter Follow LLNL on Flickr Contact: Anne M. Stark Phone: (925) 422-9799 E-mail: stark8@llnl.gov FOR IMMEDIATE RELEASE April 20, 2005 NR-05-04-02 Livermore Lab physicist dates lifetime of solar nebula at two million years LIVERMORE, Calif. - The oxygen and magnesium content of some of the oldest objects in the universe are giving clues to the lifetime of the

384

Laser fusion experiment yields record energy at Lawrence Livermore's  

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

4 4 For immediate release: 08/26/2013 | NR-13-08-04 High Resolution Image All NIF experiments are controlled and orchestrated by the integrated computer control system in the facility's control room. It consists of 950 front-end processors attached to about 60,000 control points, including mirrors, lenses, motors, sensors, cameras, amplifiers, capacitors and diagnostic instruments. Laser fusion experiment yields record energy at Lawrence Livermore's National Ignition Facility Breanna Bishop, LLNL, (925) 423-9802, bishop33@llnl.gov High Resolution Image The preamplifiers of the National Ignition Facility are the first step in increasing the energy of laser beams as they make their way toward the target chamber. LIVERMORE, Calif. -- In the early morning hours of Aug.13, Lawrence

385

Smashing science: Livermore scientists discover how explosives respond to  

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

3 3 For immediate release: 12/12/2013 | NR-13-12-03 High Resolution Image A schematic representation of the shock experiment. The resulting energy release pushed the shock front to the left. Image by Liam Krauss/LLNL. Smashing science: Livermore scientists discover how explosives respond to shockwaves Anne M Stark, LLNL, (925) 422-9799, stark8@llnl.gov Watch Video A laser pulse impinging on an aluminum ablation layer (which is coated on a glass substrate to the right), which generates a rapidly expanding plasma. This small explosion pushes the ablator to the left and drives a shock wave in the sample. The experiment simultaneously measures the speed of the shock wave in the sample, and the speed of the ablator expansion, which allows Livermore researchers to estimate the pressure and density of the

386

Secretary of Energy Advisory Board Lawrence Livermore Laboratory  

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

Lawrence Livermore Laboratory Lawrence Livermore Laboratory October 12, 2011 Agenda Open Plenary Meeting Session 9:30 AM-9:45 AM Welcome and Overview Secretary Steven Chu and Dr. William Perry 9:45 AM-10:00 AM Director's Perspective George Miller, LLNL Director 10:00 AM-10:40 AM LLNL Progress Towards Ignition and Weapons Physics Experiments on NIF Bruce Goodwin and Ed Moses 10:40 AM-11:00 AM LLNL Strategy for Improvements in Cyber Security Jim Brase 11:00 AM-11:20 AM LLNL Computational Advances in Applied Energy Julio Friedman 11:20 AM-12:00 PM DOE in the Innovation Chain Secretary Chu 12:00 PM-1:30 PM Lunch Break 1:30 PM-1:45 PM Subcommittee Updates 1:45 PM-2:30 PM Blue Ribbon Commission Update

387

Alan Alda awards Lawrence Livermore engineer for making science  

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

1 1 For immediate release: 06/04/2013 | NR-13-06-01 From left: Steve Maguire, who won in the video category of the 2013 Flame Challenge, Alan Alda and Nick Williams, who won in the written category. Alan Alda awards Lawrence Livermore engineer for making science understandable Linda A Lucchetti, LLNL, (925) 422-5815, lucchetti1@llnl.gov Students from Candlewood Middle School in Dix Hills N.Y. join Alan Alda in presenting the Flame Challege Award to Nick Williams at the World Science Festival. What is time? How would you explain it to a 5th grader? Nick Williams, a retired engineer and science presenter from Lawrence Livermore National Laboratory not only has done a fine job of conveying the concept of time to 11 year olds, he's being recognized for it. Williams

388

Lawrence Livermore National Laboratory environmental report for 1990  

SciTech Connect (OSTI)

This report documents the results of the Environmental Monitoring Program at the Lawrence Livermore National Laboratory (LLNL) and presents summary information about environmental compliance for 1990. To evaluate the effect of LLNL operations on the local environment, measurements of direct radiation and a variety of radionuclides and chemical compounds in ambient air, soil, sewage effluent surface water, groundwater, vegetation, and foodstuff were made at both the Livermore site and at Site 300 nearly. LLNL's compliance with all applicable guides, standards, and limits for radiological and nonradiological emissions to the environment was evaluated. Aside from an August 13 observation of silver concentrations slightly above guidelines for discharges to the sanitary sewer, all the monitoring data demonstrated LLNL compliance with environmental laws and regulations governing emission and discharge of materials to the environment. In addition, the monitoring data demonstrated that the environmental impacts of LLNL are minimal and pose no threat to the public to or to the environment. 114 refs., 46 figs., 79 tabs.

Sims, J.M.; Surano, K.A.; Lamson, K.C.; Balke, B.K.; Steenhoven, J.C.; Schwoegler, D.R. (eds.)

1990-01-01T23:59:59.000Z

389

Livermore team successfully leads important test of a conventional warhead  

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

102813_dod 102813_dod 10/28/2013 Livermore team successfully leads important test of a conventional warhead for the DoD Anne M Stark, LLNL, (925) 422-9799, stark8@llnl.gov LLNL served as technical lead and integrator on an important test to assess a new conventional warhead designed by the Lab. Dave Hare, Livermore's program manager of the test, called it an "unequivocal success." Below is the press release from the Department of Defense Defense Department successfully conducts warhead sled test The Defense Department announced recently the successful testing of an advanced conventional precision effects warhead, a critical part of a national effort to establish a conventional prompt strike capability. This capability will contribute to the country's ability to defend its interests

390

Environmental Impact Statement and Environmental Impact Report for Continued Operation of Lawrence Livermore National Laboratory and Sandia National Laboratories, Livermore  

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

1-1992/01eis0157_rg.html[6/24/2011 4:00:49 PM] 1-1992/01eis0157_rg.html[6/24/2011 4:00:49 PM] READER'S GUIDE The Final EIS/EIR is organized to assist the reader's understanding of the complex operations at Lawrence Livermore National Laboratory and Sandia National Laboratories, Livermore. Organization of Documents The EIS/EIR is divided into five volumes and two companion reports: Volume I. This volume contains the Final EIS/EIR, which in part relies on the detailed information in the appendices, and comprehensively discusses the proposed action, the alternatives, and the existing conditions and impacts of the proposed action and the alternatives. Volume II. This volume contains the Final EIS/EIR technical appendices which provide technical support for the analyses in Volume I and also provide additional information and references. Appendix E was originally identified in

391

LabUPDATE ISSUE 8 AUGUST 6, 2003 News about the Berkeley, Livermore and Los Alamos national laboratories,  

E-Print Network [OSTI]

with LLNL, Sandia, Northrop Grumman Space Technology/Cutting Edge Optronics.) From Lawrence Livermore

Knowles, David William

392

Fixed Monthly Living Expense Payments at the Lawrence Livermore National Laboratory, INS-L-11-05  

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

Fixed Monthly Living Expense Fixed Monthly Living Expense Payments at the Lawrence Livermore National Laboratory INS-L-11-05 September 2011 Department of Energy Washington, DC 20585 September 21, 2011 MEMORANDUM FOR MANAGER, LIVERMORE SITE OFFICE FROM: Sandra D. Bruce Assistant Inspector General for Inspections SUBJECT: INFORMATION: Inspection Report on "Fixed Monthly Living Expense Payments at the Lawrence Livermore National Laboratory" BACKGROUND The Lawrence Livermore National Laboratory (Livermore) is a Department of Energy (Department) laboratory managed and operated by Lawrence Livermore National Security, LLC, for the Department's National Nuclear Security Administration (NNSA). Livermore's mission is to ensure the safety and security of the nation through applied science and technology in key

393

Top 10 Things You Didn't Know About Lawrence Livermore National Laboratory  

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

0 Things You Didn't Know About Lawrence Livermore National 0 Things You Didn't Know About Lawrence Livermore National Laboratory Top 10 Things You Didn't Know About Lawrence Livermore National Laboratory December 6, 2013 - 6:18pm Addthis The photo above is of a cryogenically cooled target in the National Ignition Facility as "seen" by the laser through the hohlraum's laser entrance hole. | Photo courtesy of Lawrence Livermore National Laboratory. The photo above is of a cryogenically cooled target in the National Ignition Facility as "seen" by the laser through the hohlraum's laser entrance hole. | Photo courtesy of Lawrence Livermore National Laboratory. Ben Dotson Ben Dotson Project Coordinator for Digital Reform, Office of Public Affairs What are the key facts? Founded in 1952, Lawrence Livermore National Lab is one of the

394

A Cure for the Valentine's Blues? Livermore Supercomputer Seeks to Mend  

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

A Cure for the Valentine's Blues? Livermore Supercomputer Seeks to A Cure for the Valentine's Blues? Livermore Supercomputer Seeks to Mend Broken Hearts A Cure for the Valentine's Blues? Livermore Supercomputer Seeks to Mend Broken Hearts February 14, 2013 - 9:56am Addthis The Cardioid code developed by a team of Livermore and IBM scientists divides the heart into a large number of manageable pieces, or subdomains. The development team used two approaches, called Voronoi (left) and grid (right), to break the enormous computing challenge into much smaller individual tasks. | Photo from the Lawrence Livermore National Laboratory The Cardioid code developed by a team of Livermore and IBM scientists divides the heart into a large number of manageable pieces, or subdomains. The development team used two approaches, called Voronoi (left) and grid

395

Top 10 Things You Didn't Know About Lawrence Livermore National Laboratory  

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

Top 10 Things You Didn't Know About Lawrence Livermore National Top 10 Things You Didn't Know About Lawrence Livermore National Laboratory Top 10 Things You Didn't Know About Lawrence Livermore National Laboratory December 6, 2013 - 6:18pm Addthis The photo above is of a cryogenically cooled target in the National Ignition Facility as "seen" by the laser through the hohlraum's laser entrance hole. | Photo courtesy of Lawrence Livermore National Laboratory. The photo above is of a cryogenically cooled target in the National Ignition Facility as "seen" by the laser through the hohlraum's laser entrance hole. | Photo courtesy of Lawrence Livermore National Laboratory. Ben Dotson Ben Dotson Project Coordinator for Digital Reform, Office of Public Affairs What are the key facts? Founded in 1952, Lawrence Livermore National Lab is one of the

396

Preliminary Notice of Violation, Lawrence Livermore National Laboratory- EA-98-06  

Broader source: Energy.gov [DOE]

Issued to the University of California related to Criticality Safety and the Quality Assurance Program at the Lawrence Livermore National Laboratory, (EA-98-06)

397

Preliminary Notice of Violation, Lawrence Livermore National Laboratory- EA-2000-12  

Broader source: Energy.gov [DOE]

Issued to the University of California related to Authorization Basis Issues at the Lawrence Livermore National Laboratory, (EA-2000-12)

398

Preliminary Notice of Violation, Lawrence Livermore National Laboratory- EA-2003-04  

Broader source: Energy.gov [DOE]

Issued to the University of California related to an Extremity Radiological Overexposure at the Lawrence Livermore National Laboratory, (EA-2003-04)

399

Environmental Assessment for The Proposed Construction and Operation of a Biosafety Level 3 Facility at Lawrence Livermore National Laboratory, Livermore, CA (DOE/EA-1442) (12/02)  

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

Environmental Assessment for The Proposed Construction and Operation of a Biosafety Level 3 Facility at Lawrence Livermore National Laboratory, Livermore, California December 2002 Department of Energy National Nuclear Security Administration Oakland Operations Office EA for the Proposed Construction and Operation of a Biosafety Level 3 Facility at LLNL ii EXECUTIVE SUMMARY The Department of Energy (DOE), National Nuclear Security Administration (NNSA), has responsibility for national programs to reduce and counter threats from weapons of mass destruction including nuclear, chemical, and biological weapons (bioweapons). NNSA's bioscience work at Lawrence Livermore National Laboratory (LLNL) in support of these missions requires work with infectious agents, including those historically used for bioweapons.

400

Environmental Survey preliminary report, Sandia National Laboratories, Livermore, California  

SciTech Connect (OSTI)

This report contains the preliminary findings based on the first phase of an Environmental Survey at the Department of Energy (DOE) Sandia National Laboratories Livermore (SNLL), located at Livermore, California. The Survey is being conducted by DOE's Office of Environment, Safety and Health. The SNLL Survey is a portion of the larger, comprehensive DOE Environmental Survey encompassing all major operating facilities of DOE. The DOE Environmental Survey is one of a series of initiatives announced on September 18, 1985, by Secretary of Energy, John S. Herrington, to strengthen the environmental, safety, and health programs and activities within DOE. The purpose of the Environmental Survey is to identify, via a no fault'' baseline Survey of all the Department's major operating facilities, environmental problems and areas of environmental risk. The identified problem areas will be prioritized on a Department-wide basis in order of importance in 1989. The findings in this report are subject to modification based on the results from the Sampling and Analysis Phase of the Survey. The findings are also subject to modification based on comments from the Albuquerque Operations Office concerning the technical accuracy of the findings. The modified preliminary findings and any other appropriate changes will be incorporated into an Interim Report. The Interim Report will serve as the site-specific source for environmental information generated by the Survey, and ultimately as the primary source of information for the DOE-wide prioritization of environmental problems in the Survey Summary Report. 43 refs., 21 figs., 24 tabs.

Not Available

1988-01-01T23:59:59.000Z

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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

California ISO Glossary CAL I F O R N IA I S O  

E-Print Network [OSTI]

control area. This includes utilities, generating companies, transmission owners, energy- trading companies and Scheduling Coordinators. Scheduling Coordinator (SC): Entities that buy or sell power through the California ISO have to do so through a Scheduling Coordinator. The SC is specifically authorized by the ISO

402

Protein fucosylation regulates synapsin Ia Ib expression and neuronal morphology in primary  

E-Print Network [OSTI]

of Chemistry and Chemical Engineering, California Institute of Technology, 1200 East California Boulevard synaptic plasticity. fucose glycosylation neurite outgrowth glycoprotein calpain Fucose- (1-2)-galactose [Fuc (1-2)Gal], which exists as a termi- nal carbohydrate modification to N- and O-linked glycoproteins

Hsieh-Wilson, Linda

403

Infrared and optical spectroscopy of Type Ia supernovae in the nebular phase  

Science Journals Connector (OSTI)

......we derive support the basic thermonuclear explosion scenario for Type...of a white dwarf due to the thermonuclear fusion to 56Ni of ~0.5-1 Mo of...Woosley & Weaver 1994b). The thermonuclear explosion mechanism is challenged......

E. J. C. Bowers; W. P. S. Meikle; T. R. Geballe; N. A. Walton; P. A. Pinto; V. S. Dhillon; S. B. Howell; M. K. Harrop-Allin

1997-10-01T23:59:59.000Z

404

_ _i_i Association for ,nformation and Image Management i; _ J , IA Spring, Maryland 20310  

E-Print Network [OSTI]

- OPERATIONS SUPPORT OF PHASE 2 INTEGRA, TED DEMONSTRATION, FOUR VOLUMES (U) by T.C. Hazen Savannah River FINAL REPORT TEXT DATA IN TABULAR FORM -DISK 1 Prepared for: WESTINGHOUSE SAVANNAH RIVER COMPANY PO Box Subcontract No.: AA69840N Prepared for: WESTINGHOUSE SAVANNAH RIVER COMPANY P. O. BOX 616 AIKEN, S.C. 29808

Hazen, Terry

405

Greater prairie chickens have a compact MHC-B with a single class IA locus  

Science Journals Connector (OSTI)

The major histocompatibility complex (MHC) plays a central role in innate and adaptive immunity, but relatively little is known about the evolution of the number and arrangement of MHC genes in birds. Insights in...

J. A. Eimes; K. M. Reed; K. M. Mendoza; J. L. Bollmer; L. A. Whittingham

2013-02-01T23:59:59.000Z

406

Member Case Studies: LED Street Lighting Programs in Algona (IA), Asheville (NC), and Boston (MA)  

Broader source: Energy.gov [DOE]

This May 8, 2013 webcast featured presentations from DOE Municipal Solid-State Street Lighting Consortium member cities about their experiences with LED street lighting. Presenters John Bilsten of...

407

Pacific Northwest National Laboratory: INstItute for INterfacIaL cataLysIs  

E-Print Network [OSTI]

gasoline- and diesel-powered engines. To satisfy environmental and industry standards, diesel engine for diesel engines. Eliminating OxidEs Of nitROgEn EmissiOns The challenge to removing NOx from diesel engine-treatment for high-efficiency diesel engines. Research includes Determination of the mechanisms for higher

408

Constraints on dark energy with the LOSS SNIa sample  

Science Journals Connector (OSTI)

......reduce the scatter in Hubble diagrams by only using SNe at a PGCD-kpc...V max colour with rigorous handling of uncertainties and found...functionality of any supporting materials supplied by the authors. Any queries (other than missing material) should be directed to the......

Mohan Ganeshalingam; Weidong Li; Alexei V. Filippenko

2013-01-01T23:59:59.000Z

409

INFORMATION EXCELLENTIA CoLumbIA ENgINEErINg 229  

E-Print Network [OSTI]

is working on "service engineering," a concept similar to financial engineering. "It is similar to selling their options," he said. "There's an art and science to engineering and pricing services, but it is always easier when they are win-win for buyers and sellers," Gallego said. "I'm using service engineering

Hone, James

410

Constraints on dark energy with the LOSS SNIa sample  

Science Journals Connector (OSTI)

......deceleration, constrain the evolution of dark energy (DE), and search for possible...et-al. 2013). Imminent or future surveys to gather large data sets at high redshift include the Dark Energy Survey (DES) and the Large Synoptic......

Mohan Ganeshalingam; Weidong Li; Alexei V. Filippenko

2013-01-01T23:59:59.000Z

411

A STUDY OF PROPERTIES OF TYPE IA SUPERNOVA AND THE CALIBRATION OF MULTIBAND PHOTOMETRY  

E-Print Network [OSTI]

should be transformed to a standard scale for uniformity and should be corrected for precision in measurements. The sources of systematic errors are correctly identified and remedied using S-corrections and extinction corrections. The study found a larger...

Bastola, Deepak 1988-

2012-04-27T23:59:59.000Z

412

Targeted Energy Efficiency Expert Evaluation Report: Neal Smith Federal Building, Des Moines, IA  

SciTech Connect (OSTI)

This report summarizes the energy efficiency measures identified and implemented, and an analysis of the energy savings realized using low-cost/no-cost control system measures identified.

Fernandez, Nicholas; Goddard, James K.; Underhill, Ronald M.; Gowri, Krishnan

2013-03-01T23:59:59.000Z

413

On the Stability of Thermonuclear Burning Fronts in Type Ia Supernovae  

Science Journals Connector (OSTI)

The propagation of cellularly stabilized thermonuclear flames is investigated by means of numerical ... fuel flows. Our simulations indicate that in thermonuclear supernova explosions stable cellular flames devel...

F.K. Rpke; W. Hillebrandt

2005-01-01T23:59:59.000Z

414

Fitting Non-Minimally Coupled Scalar Models to Gold SnIa Dataset  

E-Print Network [OSTI]

Non-minimally coupled theories of special potentials are analyzed numerically. Such theories yield equations of state $\\omegadataset, we obtain results comparable with other models. A potential of the form $V(\\phi)=V_0e^{a_1\\phi^2}$ yields $\\chi^2_{min}=170.127$. Similar results are obtained for potentials of the form $V(\\phi)=V_0+a_1\\phi^n$.

Mingxing Luo; Qiping Su

2005-08-18T23:59:59.000Z

415

Exploring the Properties of Dark Energy Using Type Ia Supernovae and Other Datasets  

E-Print Network [OSTI]

We reconstruct dark energy properties from two complementary supernova datasets -- the newly released Gold+HST sample and SNLS. The results obtained are consistent with standard $\\Lambda$CDM model within $2\\sigma$ error bars although the Gold+HST data favour evolving dark energy slightly more than SNLS. Using complementary data from baryon acoustic oscillations and the cosmic microwave background to constrain dark energy, we find that our results in this case are strongly dependent on the present value of the matter density $\\Omega_m$. Consequently, no firm conclusions regarding constancy or variability of dark energy density can be drawn from these data alone unless the value of $\\Omega_m$ is known to an accuracy of a few percent. However, possible variability is significantly restricted if this data is used in conjunction with supernova data.

Ujjaini Alam; Varun Sahni; Alexei A. Starobinsky

2006-12-14T23:59:59.000Z

416

Research Summary Namrata Vaswani, ECE Dept, Iowa State University, Ames, IA  

E-Print Network [OSTI]

solution with very high complexity. The alternative 5 10 15 20 0 0.01 0.02 0.03 Time |Nt\\Nt-1| |Nt to the 99% energy support of the 2D discrete wavelet transform of the cardiac sequence of Fig. 1(b (modified-CS). Fig. 1(b) is for a sparsified car

Vaswani, Namrata

417

Infrared and optical spectroscopy of Type Ia supernovae in the nebular phase  

Science Journals Connector (OSTI)

......details of the spectral synthesis code. First, the similar atomic...nebular spectral synthesis code. We shall use this analysis...7e5 1e6 8e4 8.8e4 Ns+/ NS2+ 0.5 0.5 0.5 0.5 8...comprehensive spectral synthesis codes such as EDDINGTON (Eastman......

E. J. C. Bowers; W. P. S. Meikle; T. R. Geballe; N. A. Walton; P. A. Pinto; V. S. Dhillon; S. B. Howell; M. K. Harrop-Allin

1997-10-01T23:59:59.000Z

418

Pacific Northwest National Laboratory: INstItute for INterfacIaL cataLysIs  

E-Print Network [OSTI]

-pressure hydrogen may be the fuel/energy carrier in the long term, strategies to help supply and maintain the nation and diesel. the Institute for Interfacial catalysis is supporting PNNL's energy conversion Initiative conversion of coal to liquid transportation fuels. IndIReCt LIqueFaCtIon: MoRe VaLuabLe PRoduCts FoR Less

419

Page 1 I\\/|A 162 Exam 2 Thurs., Oct. 16, 2014 INSTRUCTOR ...  

E-Print Network [OSTI]

Oct 16, 2014 ... Video Lecture Cabinet. 35' Chaikboard. Audio Recording Capabilities ... .d #mw am H New. Vinum n F N w 4.2. #Ewa .5. fuma: <53 #22:.

420

ESC observations of SN 2005cf I. Photometric evolution of a normal Type Ia supernova  

Science Journals Connector (OSTI)

......Southern Observatory (ESO), Karl-Schwarzschild-Str. 2, D-85748 Garching bei Munchen...efficiency, the reflectivity of the mirrors, the atmospheric transmission and...transmission profile, M(lambda) is the mirror reflectivity function and L(lambda......

A. Pastorello; S. Taubenberger; N. Elias-Rosa; P. A. Mazzali; G. Pignata; E. Cappellaro; G. Garavini; S. Nobili; G. C. Anupama; D. D. R. Bayliss; S. Benetti; F. Bufano; N. K. Chakradhari; R. Kotak; A. Goobar; H. Navasardyan; F. Patat; D. K. Sahu; M. Salvo; B. P. Schmidt; V. Stanishev; M. Turatto; W. Hillebrandt

2007-04-11T23:59:59.000Z

Note: This page contains sample records for the topic "livermore ia ia" 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

INFORMATION EXCELLENTIA CoLumbIA ENgINEErINg202  

E-Print Network [OSTI]

energy use. "The path towards green computing systems starts with more efficient communication to the times needed for computation, on-chip communication was basically instantaneous," Carloni explained communication infrastruc- tures that make it easier to integrate new components into our designs," he said. His

Hone, James

422

Collisions of white dwarfs as a new progenitor channel for type Ia Stephan Rosswog1  

E-Print Network [OSTI]

- nario, a shock-triggered thermonuclear explosion ensues from the collision of two white dwarfs systems should provide upcoming supernova surveys with hundreds of such collision-induced thermonuclear agreement that the disintegration of a white dwarf (WD) in a thermonuclear explosion constitutes

Rosswog, Stephan

423

Thermonuclear Burning Regimes and the Use of SNe Ia in Cosmology  

E-Print Network [OSTI]

The calculations of the light curves of thermonuclear supernovae are carried out by a method of multi-group radiation hydrodynamics. The effects of spectral lines and expansion opacity are taken into account. The predictions for UBVI fluxes are given. The values of rise time for B and V bands found in our calculations are in good agreement with the observed values. We explain why our results for the rise time have more solid physical justification than those obtained by other authors. It is shown that small variations in the chemical composition of the ejecta, produced in the explosions with different regimes of nuclear burning, can influence drastically the light curve decline in the B band and, to a lesser extent, in the V band. We argue that recent results on positive cosmological constant Lambda, found from the high redshift supernova observations, could be wrong in the case of possible variations of the preferred mode of nuclear burning in the earlier Universe.

E. I. Sorokina; S. I. Blinnikov; O. S. Bartunov

1999-10-02T23:59:59.000Z

424

Improving Type Ia Supernova Standard Candle Cosmology Measurements Using Observations of Early-Type Host Galaxies  

E-Print Network [OSTI]

surveys (e.g. The Dark Energy Survey 4 or the Large Synopticsurveys such as the Dark Energy Survey, Hyper-Suprime Cam,dark energy but face sev- eral hurdles for their continued success in future large surveys.

Meyers, Joshua Evan

2012-01-01T23:59:59.000Z

425

MPC-Based Load Shedding for Voltage Stability Enhancement I.A. Hiskens B. Gong  

E-Print Network [OSTI]

of the North American power system in August 2003 could have been avoided by tripping a relatively small amount in communications and computer systems facilitate such non-disruptive load control. The paper is organized respectively. Section IV develops a linear time-varying discrete-time model of power system dynamics

Hiskens, Ian A.

426

IA REP0 SAND85-2809 Unlimited Release UC-92A  

Office of Scientific and Technical Information (OSTI)

the technique t o liquid-filled boreholes for application in geothermal in addition t o gas and oil wells. For liquid-free boreholes, multiple fracturing is specified in terms of...

427

X-ray holography at Lawrence Livermore National Laboratory  

SciTech Connect (OSTI)

The x-ray holography program at the Lawrence Livermore National Laboratory has two principal goals: (1) the development of x-ray diffraction techniques for DNA sequence analysis and (2) the development of x-ray laser holography for structural analysis of intact biological cells and organelles. DNA sequence analysis will be accomplished by applying x-ray diffraction techniques to determine the ensemble average of the sequence of labels along the individual elements of crystalline DNA. X-ray laser holographic imaging will be accomplished by applying three dimensional x-ray holography to elucidate the structure of few hundred angstrom objects such as 300 {Angstrom} chromatin fibers, nuclear pores and nucleic acid replication complexes in living cells. Existing laboratory x-ray lasers will be utilized to produce flash x-ray holograms of the biological structures.

Trebes, J.; Annese, C.; Birdsall, D.; Brase, J.; Gray, J.; Lane, S.; London, R.; Matthews, D.; Peters, D.; Pinkel, D.; Stone, G.; Rapp, D.; Rosen, M.; Weier, U.; Yorkey, T.

1990-10-11T23:59:59.000Z

428

Sandia National Laboratories: Visiting the Livermore Valley Open Campus  

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

Visiting the LVOC Visiting the LVOC LVOC Home Partnership Opportunities Featured Programs Working at the LVOC Are you a member of the research, business, or academic community who would like to learn more about current and future opportunities at the Livermore Valley Open Campus? We're actively seeking companies, research organizations, universities, and other laboratories with interests in energy, computing, homeland security, and other laboratory mission areas. Request a visit Contact us to explore collaborative opportunities and to discuss a potential visit to the LVOC. We look forward to hearing from you! Map and directions Directions to the LVOC Screen reader users: click here for plain HTML Go to Google Maps Home 37.679620,-121.697112 Loading... Map Sat Ter Did you mean a different:

429

Sandia/California named winner of "Environmental Spirit" Award by Livermore  

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

RELEASES RELEASES FOR IMMEDIATE RELEASE January 31, 2008 Sandia/California named winner of "Environmental Spirit" Award by Livermore Chamber of Commerce LIVERMORE, Calif. -Sandia National Laboratories' Livermore, Calif., site has been selected by the Livermore Chamber of Commerce as recipient of its inaugural Environmental Spirit Award. The award was presented to Sandia for its environmental programs and ongoing commitment to protecting the environment, wildlife, and numerous species on the laboratory's 400-acre site, says Dale Kaye Chamber president and CEO. "Sandia has not only shown tremendous sensitivity to the land they occupy, but also a dedicated commitment to its community," says Kaye. "This is an organization that helps to protect our world and we are

430

Lawrence Livermore National Laborotory Safety Basis Assessment Final February 11, 2011  

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

Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory Safety Basis Assessment INTRODUCTION This site visit report documents the collective results of the review of Lawrence Livermore National Laboratory (LLNL) safety basis processes and discusses its scope, objective, results and conclusions. Appendix A provides lists of the documents, interviews, and observations and Appendix B includes the plan for the review. This combined assessment was sponsored by the National Nuclear Safety Administration (NNSA) Livermore Site Office (LSO) and conducted jointly by staff from the Office of Health, Safety and Security (HSS) and LSO. The review was conducted in late 2010 and included site visits from November 29 - December 3, 2010 and December 13-17, 2010. Overall, the LLNL programs

431

Lawrence Livermore National Laboratory Operational Drill at the B332 Plutonium Facility  

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

HSS Independent Activity Report - Rev. 0 Report Number: HIAR LLNL-2013-02-27 Site: Lawrence Livermore National Laboratory (LLNL) Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for the Lawrence Livermore National Laboratory Operational Drill at the B332 Plutonium Facility Date of Activity: 02/27/2013 Report Preparer: Thomas Rogers Activity Description/Purpose: The Livermore Site Office (LSO) and Lawrence Livermore National Security, LLC (LLNS) requested personnel from the U.S. Department of Energy (DOE) Office of Safety and Emergency Management Evaluations (HS-45) to observe an operational drill at the Plutonium Facility in Building 332 (B332). LSO and LLNS desired HS-45's participation to help

432

EA-1106: Explosive Waste Treatment Facility at Site 300, Lawrence Livermore  

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

106: Explosive Waste Treatment Facility at Site 300, Lawrence 106: Explosive Waste Treatment Facility at Site 300, Lawrence Livermore National Laboratory, San Joaquin County, California EA-1106: Explosive Waste Treatment Facility at Site 300, Lawrence Livermore National Laboratory, San Joaquin County, California SUMMARY This EA evaluates the environmental impacts of the proposal to build, permit, and operate the Explosive Waste Treatment Facility to treat explosive waste at the U.S. Department of Energy's Lawrence Livermore National Laboratory Experimental Test Site, Site 300. PUBLIC COMMENT OPPORTUNITIES None available at this time. DOCUMENTS AVAILABLE FOR DOWNLOAD April 16, 1996 EA-1106: Finding of No Significant Impact Explosive Waste Treatment Facility at Site 300, Lawrence Livermore National Laboratory April 16, 1996

433

Evaluation of HotSpot, Lawerence Livermore National Laboratory - June 11,  

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

Evaluation of HotSpot, Lawerence Livermore National Laboratory - Evaluation of HotSpot, Lawerence Livermore National Laboratory - June 11, 2010 Evaluation of HotSpot, Lawerence Livermore National Laboratory - June 11, 2010 June 11, 2010 Letter from Andy Lawrence to John Nasstrom accepting the revised Hotspot In your letter dated April 16, 2010, you summarized the work done by the Lawerence Livermore National Laboratory (LLNL) to meet the Department of Energy's (DOE) recommendations from the 2007, Software Evaluation of HotSpot, and DOE, Safety Software Toolbox Recommendation, for inclusion of V2.07 in the DOE Safety Software Central Registry. Based on this work, you futher requested that HotSpot be included in the DOE Central Registry. Letter from Andy Lawrence to John Nasstrom accepting the revised Hotspot More Documents & Publications

434

Lawrence Livermore National Laborotory Safety Basis Assessment Final February 11, 2011  

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

Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory Safety Basis Assessment INTRODUCTION This site visit report documents the collective results of the review of Lawrence Livermore National Laboratory (LLNL) safety basis processes and discusses its scope, objective, results and conclusions. Appendix A provides lists of the documents, interviews, and observations and Appendix B includes the plan for the review. This combined assessment was sponsored by the National Nuclear Safety Administration (NNSA) Livermore Site Office (LSO) and conducted jointly by staff from the Office of Health, Safety and Security (HSS) and LSO. The review was conducted in late 2010 and included site visits from November 29 - December 3, 2010 and December 13-17, 2010. Overall, the LLNL programs

435

Preliminary Notice of Violation, Lawrence Livermore National Laboratory- EA-98-01  

Broader source: Energy.gov [DOE]

Issued to University of California related to the Unplanned Personnel Contaminations and Radioactive Material Intakes at the Hazardous Waste Management Facilities at the Lawrence Livermore National Laboratory, (EA-98-01)

436

EIS-0348: Continued Operation of Lawrence Livermore National Laboratory and Supplement Stockpile Stewardship and Management  

Broader source: Energy.gov [DOE]

This EIS analyzes DOE's decision to continue operation of Lawrence Livermore National Laboratory (LLNL) is critical to National Nuclear Security Administrations Stockpile Stewardship Program and to preventing the spread and use of nuclear weapons worldwide.

437

Parcel Per Parcel Toward A More Refined Carbon Emissions Estimation For Livermore, CA  

E-Print Network [OSTI]

A More Refined Carbon Emissions Estimation For Livermore, CAof lifestyle on carbon emissions in the residential sector [an all-time low in carbon emissions, though most use overall

ivanovi?, Ana

2014-01-01T23:59:59.000Z

438

Livermore Field Office Technical Qualification Program Self Assessment Report, May 31, 2013  

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

Nuclear Security Administration (NNSA) Nuclear Security Administration (NNSA) Livermore Field Office Technical Qualification Program Self Assessment Report May 31, 2013 Assessment Team Richard crowe:NNSA NA-SH-80, Team Leader Dan Schwendenman, NNSA NA-SH-50 Carol lngn;:NNSA LFO Facility Operations Approved By: Phll ' F~nt .r/:;,/;.J ~I Date Date Date~/ NNSA Livermore Field Office TQP Self Assessment (NNSA LSO TQP SA) Report Table of Contents Executive Summary ............................................................................................................. 1 Introduction .......................................................................................................................... 3 Scope and Methodology ...................................................................................................... 3

439

Inquiry into the De-Inventory of Special Nuclear Material at Lawrence Livermore National Laboratory, OAS-L-12-11  

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

Inquiry into the De-Inventory of Special Nuclear Material at Lawrence Livermore National Laboratory OAS-L-12-11 September 2012 Department of Energy Washington, DC 20585 September 21, 2012 MEMORANDUM FOR THE MANAGER, LIVERMORE SITE OFFICE FROM: David Sedillo Director, Western Audits Division Office of Inspector General SUBJECT: INFORMATION: Special Report on "Inquiry into the De-Inventory of Special Nuclear Material at Lawrence Livermore National Laboratory" BACKGROUND The Lawrence Livermore National Laboratory (Livermore) is a Department of Energy facility managed and operated by Lawrence Livermore National Security, LLC (LLNS), for the Department's National Nuclear Security Administration (NNSA). Livermore's mission is to

440

Environmental Assessment for the Proposed Environmental Remediation at Lawrence Livermore National Laboratory Site 300 Pit 7 Complex  

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

9 9 Environmental Assessment for the Proposed Environmental Remediation at Lawrence Livermore National Laboratory Site 300 Pit 7 Complex January 2007 Department of Energy National Nuclear Security Administration Livermore Site Office EA for the Proposed Environmental Remediation at the Lawrence Livermore National Laboratory Site 300 Pit 7 Complex i CONTENTS 1.0 INTRODUCTION..................................................................................................................1 1.1 Background ......................................................................................................................1 1.2 Purpose and Need for the Action .....................................................................................5

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


441

Audit of Renovation and New Construction Projects at Lawrence Livermore National Laboratory, WR-B-97-06  

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

THE SECRETARY THE SECRETARY FROM: John C. Layton Inspector General SUBJECT: INFORMATION: Report on "Audit of Renovation and New Construction Projects at Lawrence Livermore National Laboratory" BACKGROUND: Lawrence Livermore National Laboratory must periodically renovate existing facilities or build new ones to accomplish its missions or to provide infrastructure to support its missions. The objective of the audit was to determine if Livermore's proposed renovation and new construction projects met mission needs while minimizing the cost to the Government. DISCUSSION: In pursuing three projects, estimated to cost over $78 million, Livermore had not demonstrated that it had selected the

442

Lawrence Livermore, Intel, Cray produce big data machine to serve as  

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

1 1 For immediate release: 11/04/2013 | NR-13-11-01 High Resolution Image Catalyst is a unique high performance computing (HPC) cluster that will serve research scientists and provide a proving ground for new HPC and Big Data technologies and architectures. It was recently installed at Lawrence Livermore National Laboratory. Lawrence Livermore, Intel, Cray produce big data machine to serve as catalyst for next-generation HPC clusters Donald B Johnston, LLNL, (925) 423-4902, johnston19@llnl.gov Lawrence Livermore National Laboratory in partnership with Intel and Cray, today announced a unique high performance computing (HPC) cluster that will serve research scientists at all three institutions and provide a proving ground for new HPC and Big Data technologies and architectures.

443

Lawrence Livermore Site Office Safety Basis Self-Assessment Final February 11, 2011  

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

Livermore Site Office Livermore Site Office Safety Basis Self-Assessment INTRODUCTION This site visit report documents the collective results of the Office of Health, Safety and Security's (HSS) assessment of National Nuclear Safety Administration (NNSA) Livermore Site Office (LSO) safety basis processes and discusses its scope, objective, results and conclusions. Appendix A provides lists of the documents, interviews, and observations and Appendix B includes the plan for the review. The assessment was sponsored by LSO as a self-assessment and conducted jointly by HSS and LSO staff. It was completed in late 2010 and included site visits from November 29 - December 3, 2010 and December 13-17, 2010. The assessment revealed that LSO has implemented appropriate plans, procedures, and

444

Lawrence Livermore Site Office Safety Basis Self-Assessment Final February 11, 2011  

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

Livermore Site Office Livermore Site Office Safety Basis Self-Assessment INTRODUCTION This site visit report documents the collective results of the Office of Health, Safety and Security's (HSS) assessment of National Nuclear Safety Administration (NNSA) Livermore Site Office (LSO) safety basis processes and discusses its scope, objective, results and conclusions. Appendix A provides lists of the documents, interviews, and observations and Appendix B includes the plan for the review. The assessment was sponsored by LSO as a self-assessment and conducted jointly by HSS and LSO staff. It was completed in late 2010 and included site visits from November 29 - December 3, 2010 and December 13-17, 2010. The assessment revealed that LSO has implemented appropriate plans, procedures, and

445

Lawrence Livermore and Cool Earth Solar receive $1.7 million for renewable  

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

3 3 For immediate release: 05/14/2013 | NR-13-05-03 Lawrence Livermore and Cool Earth Solar receive $1.7 million for renewable energy demonstration project Anne M Stark, LLNL, (925) 422-9799, stark8@llnl.gov Printer-friendly The concentrator photovoltaic (CPV) system in the field. Photo courtesy of Cool Earth Inc. High Resolution Image The California Energy Commission (CEC) has awarded $1.7 million to a partnership between Lawrence Livermore National Laboratory and Cool Earth Solar Inc. (CES) to conduct a community-scale renewable energy integration demonstration project at the Livermore Valley Open Campus. CES is the prime awardee and is contributing an additional $1 million in matching funds to the CEC amount, while LLNL will provide advanced R&D support for the effort.

446

Lawrence Livermore National Laboratory Federal Facility Compliance Order, February 24, 1997 Summary  

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

Federal Facility Compliance Act Order for Lawrence Federal Facility Compliance Act Order for Lawrence Livermore National Laboratory Compliance Order HWCA 96/97-5002 State California Agreement Type Federal Facility Agreement Legal Driver(s) FFCAct Scope Summary Require compliance by the DOE with a Site Treatment Plan for the treatment of mixed waste at Lawrence Livermore National Laboratory Parties DOE; State of California Environmental Protection Agency (Department of Toxic Substances Control) Date 2/24/1997 SCOPE * Require compliance by the DOE with a Site Treatment Plan for the treatment of mixed waste at Lawrence Livermore National Laboratory. * Address LDR requirements pertaining to storage and treatment of covered waste at LLNL. ESTABLISHING MILESTONES * The Compliance Plan Volume of the STP provides overall schedules for achieving

447

6th US-Russian Pu Science Workshop Lawrence Livermore National Laboratory  

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

US-Russian Pu Science Workshop US-Russian Pu Science Workshop Lawrence Livermore National Laboratory University of California, Livermore, California July 14 and 15, 2006 Local Chairs: Michael Fluss, James Tobin, Adam Schwartz LLNL, Livermore, USA Alexander V. Petrovtsev, RFNC * VNIITF, Snezhinsk, Russia Boris A. Nadykto, RFNC * VNIIEF, Sarov, Russia Lidia F. Timofeeva, VNIINM, Moscow, Russia Siegfried S. Hecker, (Luis Morales POC) LANL, Los Alamos, USA Valentin E. Arkhipov, IMP, Ural Branch of RAS, Yekaterinburg, Russia This is a satellite meeting of the "Pu Futures-The Science 2006 International Conference", 9-13 July 2006, Asilomar Conference, Grounds, Pacific Grove Ca. The workshop is hosted by LLNL, under the aegis of the United States/Russian Federation Scientific and Technical Collaboration pursuant

448

Review of the Lawrence Livermore Nationa Laboratory Identiified Defective Department of Transportation Hazardous Material Packages  

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

5 5 Site Visit Report - Review of the Lawrence Livermore National Laboratory Identified Defective Department of Transportation Hazardous Material Packages This site visit report documents the results of Office of Health, Safety and Security's review of the Lawrence Livermore National Laboratory (LLNL) identification, immediate actions, communications, documentation, evaluation, reporting and follow-up to the discovery of defective Department of Transportation (DOT) UN1A2 55- and 30-gallon open head single bolt closure steel drums intended for storage and transportation of hazardous waste and materials. This review, conducted on January 26-29, 2010, was sponsored by the DOE Livermore Site Office (LSO) to support interface with the lab and this report is intended to support follow-up

449

DOE/EIS-0157-SA-01; Supplement Analysis for Continued Operation of Lawrence Livermore National Laboratory and Sandia National Laboratories, Livermore  

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

Analysis Analysis S-1 March 1999 Findings ♦ This supplement analysis evaluated a set of new and modified projects and proposals and other new information and concluded that no supplementation of the 1992 EIS/EIR for Lawrence Livermore National Laboratory (LLNL) and Sandia National Laboratories (SNL), Livermore, is needed. Either the projected impacts are within the bounds of the 1992 EIS/EIR, the impacts were anticipated by mitigation measures established in the 1992 EIS/EIR, or the incremental differences in impacts are not significant. ♦ While proposed increases in administrative limits for radioactive materials at LLNL might slightly increase radiological releases during accidents, the resulting consequences are expected to remain essentially the same as described in the 1992

450

Plutonium discharges to the sanitary sewer: Health impacts at the Livermore Water Reclamation Plant  

SciTech Connect (OSTI)

The Lawrence Livermore National Laboratory (LLNL) is the largest discharger of sewage treated by the Livermore Water Reclamation (LWRP), contributing approximately 7% by volume of the LWRP influent LILNL operations, as potential sources both of industrial pollutants and radioactivity, are therefore of particular concern to the LWRP. For this reason, LLNL has maintained vigorous wastewater discharge control and monitoring programs. In particular, the monitoring program has demonstrated that, except in a few rare instances, the concentration of contaminants in LLNL effluent have always remained below the appropriate regulatory standards. The exceptions have generally been due to inadvertent discharges of metals-bearing solutions produced by metal plating or cleaning operations.

Balke, B.K.

1993-04-16T23:59:59.000Z

451

Lawrence Livermore National Laboratory Main Site FFA Under CERCLA Section 120, November 1, 1988 Summary  

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

Lawrence Livermore National Laboratory (Main Site) Lawrence Livermore National Laboratory (Main Site) Federal Facility Agreement Under CERCLA Section 120, November 1, 1988 State California Agreement Type Federal Facility Agreement Legal Driver(s) CERCLA Scope Summary Establish a procedural framework and schedule for developing, implementing, and monitoring appropriate response actions at the Site Parties DOE; USEPA; California Department of Health Services; California Regional Water Quality Control Board Date 11/1/1988 SCOPE * Establish a procedural framework and schedule for developing, implementing, and monitoring appropriate response actions at the Site. * Establish a basis for a determination that the DOE has completed remedial action and corrective measures to satisfaction. ESTABLISHING MILESTONES

452

Final Environmental Impact Statement and Environmental Impact Report for continued operation of Lawrence Livermore National Laboratory and Sandia National Laboratories, Livermore. Volume 4, Comments and responses  

SciTech Connect (OSTI)

This Environmental Impact Statement/Environmental Impact Report (EIS/EIR) is prepared pursuant to the National Environmental Policy Act (NEPA) and the California Environmental Quality Act (CEQA). This document analyzes the potential environmental impacts of the proposed action: continued operation, including near-term (within 5 to 10 years) proposed projects, of Lawrence Livermore National Laboratory (LLNL) and Sandia National Laboratories, Livermore (SNL, Livermore). Additionally, this document analyzes a no action alternative involving continuing operations at FY 1992 funding levels without further growth, a modification of operations alternative to reduce adverse environmental impacts of operations or facilities, and a shutdown and decommissioning alternative of UC discontinuing its management of LLNL after the current contract expires on September 30, 1992. This document assesses the environmental impacts of the Laboratories` operations on air and water quality, geological and ecological systems, occupational and public health risks, prehistoric and historic resources, endangered species, floodplains and wetlands, socioeconomic resources, hazardous waste management, site contamination, and other environmental issues. The EIS/EIR is divided into five volumes and two companion reports. This volume contains copies of the written comments and transcripts of individual statements at the public hearing and the responses to them.

Not Available

1992-08-01T23:59:59.000Z

453

Final Environmental Impact Statement and Environmental Impact Report for continued operation of Lawrence Livermore National Laboratory and Sandia National Laboratories, Livermore. Volume 1, Text  

SciTech Connect (OSTI)

This Environmental Impact Statement/Environmental Impact Report (EIS/EIR) is prepared pursuant to the National Environmental Policy Act (NEPA) and the California Environmental Quality Act (CEQA). This document analyzes the potential environmental impacts of the proposed action: continued operation, including near-term (within 5 to 10 years) proposed projects, of Lawrence Livermore National Laboratory (LLNL) and Sandia National Laboratories, Livermore (SNL, Livermore). Additionally, this document analyzes a no action alternative involving continuing operations at FY 1992 funding levels without further growth, a modification of operations alternative to reduce adverse environmental impacts of operations or facilities, and a shutdown and decommissioning alternative of UC discontinuing its management of LLNL after the current contract expires on September 30, 1992. This document assesses the environmental impacts of the Laboratories` operations on air and water quality, geological and ecological systems, occupational and public health risks, prehistoric and historic resources, endangered species, floodplains and wetlands, socioeconomic resources, hazardous waste management, site contamination, and other environmental issues. The EIS/EIR is divided into five volumes and two companion reports. This volume contains the Final EIS/EIR, which in part relies on the detailed information in the appendices, and comprehensively discusses the proposed action, the alternatives, and the existing conditions and impacts of the proposed action and the alternatives.

Not Available

1992-08-01T23:59:59.000Z

454

Final Environmental Impact Statement and Environmental Impact Report for continued operation of Lawrence Livermore National Laboratory and Sandia National Laboratories, Livermore. Volume 3, Appendices F--M  

SciTech Connect (OSTI)

This Environmental Impact Statement/Environmental Impact Report (EIS/EIR) is prepared pursuant to the National Environmental Policy Act (NEPA) and the California Environmental Quality Act (CEQA). This document analyzes the potential environmental impacts of the proposed action: continued operation, including near-term (within 5 to 10 years) proposed projects, of Lawrence Livermore National Laboratory (LLNL) and Sandia National Laboratories, Livermore (SNL, Livermore). Additionally, this document analyzes a no action alternative involving continuing operations at FY 1992 funding levels without further growth, a modification of operations alternative to reduce adverse environmental impacts of operations or facilities, and a shutdown and decommissioning alternative of UC discontinuing its management of LLNL after the current contract expires on September 30, 1992. This document assesses the environmental impacts of the Laboratories` operations on air and water quality, geological and ecological systems, occupational and public health risks, prehistoric and historic resources, endangered species, floodplains and wetlands, socioeconomic resources, hazardous waste management, site contamination, and other environmental issues. The EIS/EIR is divided into five volumes and two companion reports. This volume contains the Final EIS/EIR technical appendices F through M. Appendix L has been revised to reflect public information activities since publication of the Draft EIS/EIR. These appendices provide technical support for the analyses in Volume 1 and also provide additional information and references.

Not Available

1992-08-01T23:59:59.000Z

455

Final Environmental Impact Statement and Environmental Impact Report for continued operation of Lawrence Livermore National Laboratory and Sandia National Laboratories, Livermore. Executive summary  

SciTech Connect (OSTI)

The US Department of Energy (DOE) and the Regents of the University of California (UC) propose the continued operation, including near-term proposed projects, of the Lawrence Livermore National Laboratory (LLNL). In addition, DOE proposes the continued operation, including near-term proposed projects, of Sandia National Laboratories, Livermore (SNL, Livermore). Continued operation plus proposed projects at the two Laboratories is needed so that the research and development missions established by Congress and the President can continue to be supported. As provided and encouraged by the National Environmental Policy Act (NEPA) and the California Environmental Quality Act (CEQA), DOE and UC have prepared this document as a joint Environmental Impact Statement (EIS) and Environmental Impact Report (EIR) to analyze the impacts of the proposed action. In addition, this document discusses a no action alternative for continuing operations at FY 1992 funding levels without further growth, a modification of operations alternative focused on specific adverse environmental impacts of operations or facilities, and a shutdown and decommissioning alternative. This document also examines the alternative of UC discontinuing its management of LLNL after the current contract expires on September 30, 1992. The environmental documentation process provides information to the public, government agencies, and decision makers about the environmental impacts of implementing the proposed and alternative actions. In addition, this environmental documentation identifies alternatives and possible ways to reduce or prevent environmental impacts. A list of the issues raised through the EIS/EIR scoping process is presented.

Not Available

1992-08-01T23:59:59.000Z

456

Final Environmental Impact Statement/Environmental Impact Report for continued operation of Lawrence Livermore National Laboratory and Sandia National Laboratories, Livermore. Volume 2, Appendices A--D  

SciTech Connect (OSTI)

This Environmental Impact Statement/Environmental Impact Report (EIS/EIR) is prepared pursuant to the National Environmental Policy Act (NEPA) and the California Environmental Quality Act (CEQA). This document analyzes the potential environmental impacts of the proposed action: continued operation, including near-term (within 5 to 10 years) proposed projects, of Lawrence Livermore National Laboratory (LLNL) and Sandia National Laboratories, Livermore (SNL, Livermore). Additionally, this document analyzes a no action alternative involving continuing operations at FY 1992 funding levels without further growth, a modification of operations alternative to reduce adverse environmental impacts of operations or facilities, and a shutdown and decommissioning alternative of UC discontinuing its management of LLNL after the current contract expires on September 30, 1992. This document assesses the environmental impacts of the Laboratories` operations on air and water quality, geological and ecological systems, occupational and public health risks, prehistoric and historic resources, endangered species, floodplains and wetlands, socioeconomic resources, hazardous waste management, site contamination, and other environmental issues. The EIS/EIR is divided into five volumes and two companion reports. This volume contains the Final EIS/EIR technical appendices which provide technical support for the analyses in Volume 1 and also provide additional information and references.

Not Available

1992-08-01T23:59:59.000Z

457

This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Security, LLC, Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344  

E-Print Network [OSTI]

This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Security, LLC, Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344 LLNL Vulcan TAW Helen Trident Texas Vulcan PW LULI 2000 TITAN Gekko XII FIREX I NIF ARC Quad OMEGA EP PETAL

458

This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Security, LLC, Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344  

E-Print Network [OSTI]

This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Security, LLC, Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344 LLNL States of Matter ­ FI Advanced Concepts Exploration ­ Virtual Lab for Technology ITER NIF Burning Plasma

459

LabUPDATE ISSUE 7 JUNE 11, 2003 News about the Berkeley, Livermore and Los Alamos national laboratories,  

E-Print Network [OSTI]

: The National Ignition Facility at Lawrence Livermore National Laboratory has produced a record energy levelLabUPDATE ISSUE 7 ­ JUNE 11, 2003 News about the Berkeley, Livermore and Los Alamos national technical goals. "Full NIF equivalent" performance (extrapolating the single beam output to the 192 beams

Knowles, David William

460

Review of Integrated Safety Management System Effectiveness at Lawrence Livermore National Laboratory, September 2011  

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

Oversight Review of Oversight Review of Integrated Safety Management System Effectiveness at Lawrence Livermore National Laboratory September 2011 Office of Safety and Emergency Management Evaluations Office of Health, Safety and Security U.S. Department of Energy Table of Contents 1.0 Purpose ................................................................................................................................... 1 2.0 Introduction ............................................................................................................................ 1 3.0 Scope ...................................................................................................................................... 1 4.0 Summary of Results ............................................................................................................... 1

Note: This page contains sample records for the topic "livermore ia ia" 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

Independent Oversight Review of Integrated Safety Management System Effectiveness at the Livermore Site Office, October 2011  

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

Office of Enforcement and Oversight Office of Enforcement and Oversight Independent Oversight Review of Integrated Safety Management System Effectiveness at the Livermore Site Office October 2011 Office of Safety and Emergency Management Evaluations Office of Health, Safety and Security U.S. Department of Energy Table of Contents 1.0 Purpose ............................................................................................................................................. 1 2.0 Background ...................................................................................................................................... 1 3.0 Scope ................................................................................................................................................ 1

462

Independent Oversight Review of the Fire Protection Program at Lawrence Livermore National Laboratory, September 2013  

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

Fire Protection Program at Fire Protection Program at Lawrence Livermore National Laboratory May 2011 February 2013 September 2013 Office of Safety and Emergency Management Evaluations Office of Enforcement and Oversight Office of Health, Safety and Security U. S. Department of Energy Table of Contents 1.0 Purpose .................................................................................................................................................... 1 2.0 Background ............................................................................................................................................. 1 3.0 Scope ....................................................................................................................................................... 2

463

Independent Oversight Review of the Fire Protection Program at Lawrence Livermore National Laboratory, September 2013  

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

Fire Protection Program at Fire Protection Program at Lawrence Livermore National Laboratory May 2011 February 2013 September 2013 Office of Safety and Emergency Management Evaluations Office of Enforcement and Oversight Office of Health, Safety and Security U. S. Department of Energy Table of Contents 1.0 Purpose .................................................................................................................................................... 1 2.0 Background ............................................................................................................................................. 1 3.0 Scope ....................................................................................................................................................... 2

464

Review of Integrated Safety Management System Effectiveness at Lawrence Livermore National Laboratory, September 2011  

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

Oversight Review of Oversight Review of Integrated Safety Management System Effectiveness at Lawrence Livermore National Laboratory September 2011 Office of Safety and Emergency Management Evaluations Office of Health, Safety and Security U.S. Department of Energy Table of Contents 1.0 Purpose ................................................................................................................................... 1 2.0 Introduction ............................................................................................................................ 1 3.0 Scope ...................................................................................................................................... 1 4.0 Summary of Results ............................................................................................................... 1

465

Mitigation Monitoring and Reporting Program for continued operation of Lawrence Livermore National Laboratory  

SciTech Connect (OSTI)

A Mitigation Monitoring and Reporting Program, required by the California Environmental Quality Act, was developed by UC as part of the Final EIS/EIR process. This document describing the program is a companion to the Final Environmental Impact Statement/Environmental Impact Report (EIS/EIR) for the Continued Operation of Lawrence Livermore National Laboratory (LLNL) and Sandia National Laboratories, Livermore (SNL, Livermore). The Final EIS/EIR analyzes the potential environmental impacts of the proposed action, which for the purposes of NEPA is: continued operation, including near-term (within 5 to 1 0 years) proposed projects, of LLNL and SNL, Livermore. The proposed action for the EIR is the renewal of the contract between DOE and UC for UC`s continued operation and management of LLNL. The Mitigation Monitoring and Reporting Program is for implementing and monitoring progress of measures taken to mitigate the significant impacts of the proposed action. A complete description of the impacts and proposed mitigations is in Section 5 of Volume I of the Final EIS/EIR. This report summarizes the mitigation measures, identifies the responsible party at the Laboratory for implementing the mitigation measure, states when monitoring will be implemented, when the mitigation measure will be in place and monitoring completed, and who will verify that the mitigation measure was implemented.

Not Available

1992-08-01T23:59:59.000Z

466

Electromechanical battery research and development at the Lawrence Livermore National Laboratory  

SciTech Connect (OSTI)

The concepts undergirding a funded program to develop a modular electromechanical battery (EMB) at the Lawrence Livermore National Laboratory are described. Example parameters for EMBs for electric and hybrid-electric vehicles are given, and the importance of the high energy recovery efficiency of EMBs in increasing vehicle range in urban driving is shown.

Post, R.F.; Baldwin, D.E.; Bender, D.A.; Fowler, T.K.

1993-06-01T23:59:59.000Z

467

JOl/mal 0(\\ 'egetaliol/ Sciellce 2,' 539-544, 1991 IA\\'S.' OI'I/I/ls Press Ul'l'mla, Primed ill The UiliTed Siaies olAmerim  

E-Print Network [OSTI]

, N. C. l,2* & Podani, J.1,3 Iinlemalional Centrefor E/l\\'ironmental and Marine Sciences communities (Kenkel, juhasz-Nagy & Podani 1989). Pattern recogni tion refers to the detection of the intensity the relation ship b

Kenkel, Norm

468

Department of Physics and Astronomy, The University of Iowa, Iowa City, IA 52242 USA Dows Institute for Dental Research, Dept. of Endodontics, College of Dentistry, The University of Iowa, Iowa City, IA 52242  

E-Print Network [OSTI]

onto the surface of agar, and spots on this surface were then treated with plasma. Afterwards is applied to a needle-shaped electrode located inside a concentric gas-flow nozzle. The nozzle has

Goree, John

469

DISCOVERY OF TWO DISTANT TYPE Ia SUPERNOVAE IN THE HUBBLE DEEP FIELDNORTH WITH THE ADVANCED CAMERA FOR SURVEYS  

E-Print Network [OSTI]

-standing indications from clus- ter and large-scale structure studies, and a mysterious dark energy component usually back- ground (CMB) analyses (e.g., Jaffe et al. 2001; Pryke et al. 2002), but the ratio of dark energy to matter at the present epoch is roughly 2 : 1. While a dark energy component is the favored explana- tion

Golimowski, David A.

470

Examples of liftings of Nichols algebras over racks * Nicol'as Andruskiewitsch and Mat'ias Gra"na  

E-Print Network [OSTI]

Examples of liftings of Nichols algebras over racks Abstract We review known examples of finite-dimensional Nichols algebras associa* *ted to racks of the rack of transpositions in Sn with constant cocycle -1. 2000 AMS Subject Classification: 16W30

Graña, Matías

471

Abstract IA12: Translation of an OX40 agonist: Putting a foot on an immunologic gas pedal.  

Science Journals Connector (OSTI)

...Identification of Benzo(a)pyrene Metabolites by Gas Chromatograph-Mass Spectrometer Gonya...requests for reprints should be addressed. A gas chromatograph-mass spectrometer was used...Identification of benzo(a)pyrene metabolites by gas chromatograph-mass spectrometer. | A...

Andrew D. Weinberg

2013-01-01T23:59:59.000Z

472

GOLDIE THEORY FOR JORDAN ALGEBRAS antonio fern'andez l'opez, eulalia garc'ia rus and fernando montaner  

E-Print Network [OSTI]

GOLDIE THEORY FOR JORDAN ALGEBRAS antonio fern'andez l'opez, eulalia garc. * * At the same time, Jordan versions of the main notions of the associative theory * *are studied. In particular, it is proved that the nondegenerate Jordan algebras of fin* *ite capacity are precisely

473

NOETHERIAN BANACH JORDAN PAIRS N. Boudi*, A. Fern'andez L'opezy, E. Garc'ia  

E-Print Network [OSTI]

NOETHERIAN BANACH JORDAN PAIRS N. Boudi*, A. Fern'andez L by Benslimane and Boudi [BeB1] to the alternative case. For a Jordan algebra J or a Jordan pair V a* *nd Boudi [BeB2] proved that a complex Noetherian Banach Jordan algebra is finite dimensional

474

Rapidly-Exploring Random Trees: Progress and Prospects Steven M. LaValle, Iowa State University, Ames, IA, USA  

E-Print Network [OSTI]

Rapidly-Exploring Random Trees: Progress and Prospects Steven M. LaValle, Iowa State University current progress on the design and analysis of path planning algorithms based on Rapidly- exploring Random to rapidly and uniformly explore the state space, o#11;ering bene#12;ts that are similar to those ob- tained

LaValle, Steven M.

475

Vehicle Technologies Office Merit Review 2014: International Energy Agency (IEA IA-AMT) International Characterization Methods (Agreement ID:26462)  

Broader source: Energy.gov [DOE]

Presentation given by Oak Ridge National Laboratory at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about International...

476

Nearby Supernova Factory Observations of SN 2005gj: Another Type Ia Supernova in a Massive Circumstellar Envelope  

E-Print Network [OSTI]

scenarios both involve the thermonuclear disruption of whitelead to new channels for thermonuclear SNe. For example,thermonuclear SNe inside a dense

2006-01-01T23:59:59.000Z

477

Secteur publique (universit, InrIa, InSEE, ministres) et secteur priv (industrie : aronautique, automobile, militaire,  

E-Print Network [OSTI]

, automobile, militaire, services, banques, finances et assurances) Semestre 1 · Mécanique des fluides

Daveau, Christian

478

Supporting Online Material: I.A. Chen, R.W. Roberts, J.W. Szostak Materials and Methods  

E-Print Network [OSTI]

of a stock POPC/chloroform solution followed by resuspension of the thin film and five freeze-thaw cycles. Low osmolarity vesicles were obtained by resuspension in 0.2 M bicine, pH 8.5, titrated with NaOH. For oleic acid and POPC, high osmolarity vesicles were obtained by resuspension in 1 M sucrose, 0.2 M bicine

Heller, Eric

479

Rechnungslegung Nach EG-Richtlinien, US-GAAP und IAS als Mgliche Grundlagen Einer International Harmonisierten Rechnungslegung  

Science Journals Connector (OSTI)

Grundstzlich wird mit der Harmonisierung der Rechnungslegungsvorschriften in der Europischen Union nicht die Vereinheitlichung der Vorschriften, sondern nur die Vergleichbarkeit und Gleichwertigkeit der im J...

Kurt V. Auer

1999-01-01T23:59:59.000Z

480

Rechnungslegung nach EG-Richtlinien, US-GAAP und IAS als Mgliche Grundlagen Einer International Harmonisierten Rechnungslegung  

Science Journals Connector (OSTI)

Grundstzlich wird mit der Harmonisierung der Rechnungslegungsvorschriften in der Europischen Union nicht die Vereinheitlichung der Vorschriften, sondern nur die Vergleichbarkeit und Gleichwertigkeit der im J...

Kurt Vinzenz Auer

1997-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "livermore ia ia" 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

Automotive Stirling Engine Market and Industrial Readiness Program (MIRP). Final report for Phase IA, September 15, 1982-July 31, 1984  

SciTech Connect (OSTI)

A brief history of the project is presented. Included in appendices are the scope of work, management and cost plans, major milestones, and the digital engine control spare parts' list. (MHR)

Not Available

1984-08-01T23:59:59.000Z

482