National Library of Energy BETA

Sample records for halifax nova scotia

  1. Towards a new energy strategy for Nova Scotia Response to

    E-Print Network [OSTI]

    Hughes, Larry

    Halifax, Nova Scotia, Canada larry.hughes@dal.ca http://lh.ece.dal.ca/enen 19 December 2007 Natural gas RPP Coal (imp) Coal (dom) Renewables (non-utility) Secure Low carbon High carbon Insecure #12

  2. Dalhousie Medical School Cancer Researcher Seeks Biomarkers of Treatment Success HALIFAX,NOVA SCOTIA | CANADA B3H 4H7 | +1 (902) 494-2756

    E-Print Network [OSTI]

    Dellaire, Graham

    ,NOVA SCOTIA | CANADA B3H 4H7 | +1 (902) 494-2756 FACULTY OF MEDICINE COMMUNICATIONS OFFICE NEWS & FEATURE are like the canary in the coal mine, alerting us to potentially cancer-causing changes in the cell and testing biomarkers for early detection of cancer in Atlantic Canada. "My work to locate biomarkers

  3. Nova Scotia Department of Energy's "Nova Scotia Energy Strategy -Progress Report II"

    E-Print Network [OSTI]

    Hughes, Larry

    Review of Nova Scotia Department of Energy's "Nova Scotia Energy Strategy - Progress Report II" Larry Hughes Energy Research Group Department of Electrical and Computer Engineering Dalhousie University 30 April 2004 Abstract Early in March 2004, the Nova Scotia Department of Energy released its

  4. An Examination of Nova Scotia Power Incorporated's

    E-Print Network [OSTI]

    Hughes, Larry

    1 An Examination of Nova Scotia Power Incorporated's Green Power Rider Larry Hughes Department (NSPI) made application to the Nova Scotia Utility and Review Board for an Optional Green Power Rider to be added to their existing Domestic (that is, residential) Services Rates [1]. The proposed Green Power

  5. Energy Security in Nova Scotia Larry Hughes

    E-Print Network [OSTI]

    Hughes, Larry

    of energy) PV ­ Photovoltaic (usually solar panels that generate electricity from the sun) RES ­ RenewableERG/200703 Energy Security in Nova Scotia Larry Hughes Energy Research Group Department: Energy Security in Nova Scotia 1 Glossary b/d ­ barrels per day BCF ­ Billion Cubic Feet CAPP ­ Canadian

  6. Efficiency Nova Scotia Releases Energy Efficiency Mobile App...

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

    chairs, and a window looking outside. Better Buildings Residential Network member Efficiency Nova Scotia recently released Spot it-an energy efficiency game app for mobile...

  7. NSUARB -NSPI -P-887 NOVA SCOTIA UTILITY AND REVIEW BOARD

    E-Print Network [OSTI]

    Hughes, Larry

    it to purchase electricity from out-of-province suppliers such as NB Power or Quebec Hydro. These higher costs ADJUSTMENT MECHANISM (FAM) FOR NOVA SCOTIA POWER INCORPORATED Comments on FAM Proposals Filed 5 March 2007 Background Unlike most other Canadian utilities, Nova Scotia Power Incorporated relies on fossil energy

  8. NOVA SCOTIA UTILITY AND REVIEW BOARD IN THE MATTER OF: The Public Utilities Act, R.S.N.S. 1989, c.380 as

    E-Print Network [OSTI]

    Hughes, Larry

    Halifax, Nova Scotia, B3J 2X4, Canada larry.hughes@dal.ca 24 November 2004 Abstract Energy suppliers-subsidization, and does not allow the energy supplier to create price signals. Although other, more progressive billing schemes, such as time-of-usage billing, exist, some energy suppliers and their customers are reluctant

  9. Nova Scotia Research and Innovation Graduate Scholarships Information Sheet May 2014

    E-Print Network [OSTI]

    · ICT · Life Sciences · Ocean Science and Tecnology #12;Nova Scotia Research and Innovation Graduate

  10. Energy Security in Nova Scotia Larry Hughes

    E-Print Network [OSTI]

    Hughes, Larry

    ;Energy security: Examples · UK: ­ North Sea oil and natural gas have peaked ­ Relying on Russia (pipeline.3% Coal 25.1% Natural gas 20.9% Biomass 10.6% Nuclear 6.5% Hydro 2.2% Other 0.4% · Energy: ­ Over 98, Saskatchewan, Newfoundland · Natural gas: ­ B.C., Alberta, Saskatchewan, Frontier · Coal: ­ B.C., Alberta, Nova

  11. Dendrochronological dating of coal mine workings at the Joggins Fossil Cliffs, Nova Scotia, Canada

    E-Print Network [OSTI]

    Walters, Bradley B.

    Dendrochronological dating of coal mine workings at the Joggins Fossil Cliffs, Nova Scotia, Canada, New Brunswick E4L 1A7, Canada 2. Department of Earth Sciences, Royal Holloway, University of London, Nova Scotia B3H 4J1, Canada * Corresponding author Date received 4 May 2010 ¶ Date

  12. An Analysis of Likely Scalants in the Treatment of Produced Water from Nova Scotia

    E-Print Network [OSTI]

    Theil, Gregory P.

    A significant barrier to further use of hydraulic fracturing to recover shale oil and/or gas is the treatment and/or disposal of hypersaline produced water. This work is an analysis of produced water from Nova Scotia, with ...

  13. Space Heating Trends in Prince Edward Island and Nova Scotia1 Mandeep Dhaliwal and Larry Hughes

    E-Print Network [OSTI]

    Hughes, Larry

    ERG/200604 Space Heating Trends in Prince Edward Island and Nova Scotia1 Mandeep Dhaliwal and Larry in a northern country such as Canada. Residential space heating is of particular interest in Prince Edward (NRCan) suggests that despite their similarities, the space heating requirements for Prince Edward Island

  14. Does Nova Scotia have an electric future? Response to

    E-Print Network [OSTI]

    Hughes, Larry

    and radical changes in energy markets (IEA, 2007a; NPC, 2007). The cost and availability of crude oil, and electricity (IEA, 2007b). Jurisdictions that rely on supplies of crude oil, coal, and natural gas will be particularly vulnerable to cost increases and supply shortfalls (IEA, 2007b). One such jurisdiction is Nova

  15. Efficiency Nova Scotia Releases Energy Efficiency Mobile App | Department

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum Based|DepartmentStatementofApril 25,EVthe nextofof Energy Efficiency Nova

  16. Chronology and stratigraphy of the Fundy and related Nova Scotia offshore basins and Morocco based on core

    E-Print Network [OSTI]

    Olsen, Paul E.

    #12;51 Chronology and stratigraphy of the Fundy and related Nova Scotia offshore basins and Morocco and provided a basis for the development of a complete lithological and paleomagnetic reversal stratigraphy for the Blomidon Formation (Kent and Olsen, 2000). The paleomagnetic polarity stratigraphy of the outcropping

  17. Professor Paul S. Hill Department of Oceanography, Dalhousie University, Halifax, Nova Scotia, Canada B3H 4J1

    E-Print Network [OSTI]

    Taggart, Christopher

    /OETR Nearfield effects of tidal power 2009-2012 $208,344 U. S. ONR OASIS II 2010-2011 $142,000 OEER/OETR Farfield effects of tidal power generation 2006-2011: $134,500 NSERC Discovery Oil-mineral aggregation in coastal in the Bay of Fundy #12;2010-2012 $109,329 U. S. ONR Tidal Flats DRI II 2010-2012 $182,300 OEER

  18. Graphics Interface Conference 2015, 35 June, Halifax, Nova Scotia, Canada Penny Pincher: A Blazing Fast, Highly Accurate $-Family Recognizer

    E-Print Network [OSTI]

    Pattanaik, Sumanta N.

    Penny Pincher: A Blazing Fast, Highly Accurate $-Family Recognizer Eugene M. Taranta II Department in certain cases. Our recognizer Penny Pincher achieves high accuracy by being able to process a large number outperform its rival recognizers. Penny Pincher achieves this goal by reducing the template matching process

  19. NOVA SCOTIA UTILITY AND REVIEW BOARD IN THE MATTER OF: The Public Utilities Act, R.S.N.S. 1989, c.380 as

    E-Print Network [OSTI]

    Hughes, Larry

    itself differently from the Independent Power Producers who were competing for11 contracts.12 I have also.S.N.S. 1989, c.380 as amended - and - IN THE MATTER OF: An Application by Nova Scotia Power Incorporated of the7 provincial legislature.8 I have also examined NSPI's Green Power Rider, which was subsequently

  20. Text and slides of presentation originally presented to the Nova Scotia Utility and Review Board regarding the province's Demand Side Management program,19 April 2010.

    E-Print Network [OSTI]

    Hughes, Larry

    households, heats his home with oil (Nova Scotia Finance 2007). When we discussed the issue of oil sources (APERC 2007, Hughes and Shupe 2010). We now live in an age of rising competition for oil products: China and other emerging market economies are increasing their consumption of oil at breathtaking speed

  1. Contingent Valuation, Hypothetical Bias and Experimental Economics JAMES J. MURPHY

    E-Print Network [OSTI]

    Murphy, James J.

    of Massachusetts-Amherst Prepared for the NAREA-CAES Conference June 20-23, 2004 Halifax, Nova Scotia Abstract

  2. Title: Satellite Streetview: Canadian Cities and Regions Data Creator /

    E-Print Network [OSTI]

    , Hamilton, Kitchener, St. Catharines, Quebec City, Montreal, Jonquiere, Halifax, Fredericton, St. Johns, Ontario; Cornwall, Ontario; Hamilton, Ontario; Kitchener, Ontario; St, Catherines, Ontario; Quebec City, Quebec; Montreal, Quebec; Jonquiere, Quebec; Halifax, Nova Scotia; Fredericton, New Brunswick; St. John

  3. Nova Scotia: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History ViewMayo, Maryland:NPI VenturesNewSt. Louis, Minnesota: EnergyOhio: EnergyNottingham,

  4. Radiological Scoping Survey of the Scotia Depot, Scotia, NY

    SciTech Connect (OSTI)

    Bailey, E. N.

    2008-02-25

    The objectives of the radiological scoping survey were to collect adequate field data for use in evaluating the radiological condition of Scotia Depot land areas, warehouses, and support buildings.

  5. 1360 Barrington Street P.O. Box 1000

    E-Print Network [OSTI]

    Hughes, Larry

    Outhouse, Counsel, Nova Scotia Utility and Review Board, 1601 Lower Water Street, 3rd Floor, Halifax, Nova little to help Nova Scotia obtain energy security or reduce its greenhouse gas emissions. In our Privatization Act of 1992, which states that "the Company shall not construct a generating plant that utilizes

  6. Application to Export Electric Energy OE Docket No. EA-355 Scotia...

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

    Scotia Capital Energyto export electric energy to Canada Application to Export Electric Energy OE Docket No EA-355 Scotia Capital Energy More Documents & Publications EA-355 Scotia...

  7. Air Quality (Nova Scotia, Canada) | Department of Energy

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

    Industrial Investor-Owned Utility Multi-Family Residential MunicipalPublic Utility Rural Electric Cooperative Utility Program Info Program Type Environmental Regulations Provider...

  8. Acadia University Wolfville, Nova Scotia BOP 1XO

    E-Print Network [OSTI]

    McLeod, Ian

    : · Chawla, J.S. (1988), A Note on General Ridge Estimator. Communications in Statistics A, 17. #12;2 ACADIA, Multivariate Analysis, Em- pirical Bayes Theory, Distribution Theory, Statistical Modelling, Robust Inference Department offers an undergraduate degree (Honours or general) in statistics. Students are trained in the use

  9. Surviving racism: African Nova Scotian women talk about the daily

    E-Print Network [OSTI]

    Brownstone, Rob

    Surviving racism: African Nova Scotian women talk about the daily racism they've experienced a discussion Wednesday as part of Dalhousie's Global Health Rounds. Titled "Surviving Racism and its Impact Scotia #12;does not still have a history of racism and I can assure you that that history is strong

  10. Redesign and shock analysis of HALIFAX class frigate gas turbine uptake structure

    E-Print Network [OSTI]

    Summers, Simon A. (Simon Andrew)

    2008-01-01

    The gas turbine exhaust uptakes in the HALIFAX class frigates of the Canadian Navy have experienced thermally-induced fatigue cracking since soon after the commissioning of these ships. The uptake structure is heavily ...

  11. 361Computer Physics Communications 33(1984) 361 --366 North-Holland, Amsterdam

    E-Print Network [OSTI]

    Creutz, Michael

    1984-01-01

    FOR INVESTIGATIONS ON THE THREE-DIMENSIONAL ISING MODEL Michael CREUTZ Department of Physics, Brookhaven National, Statistics and Computing Science, Daihousie University, Halifax, Nova Scotia B3H 4H8, Canada and K 10 April 1984; in revised form 8 May 1984 PROGRAM SUMMARY Title ofprogram: ISING Keywords: Ising

  12. Winston Roberts Born: 10 September 1958; Port of Spain, Trinidad

    E-Print Network [OSTI]

    McQuade, D. Tyler

    2006 - present · Program Manager, Office of Nuclear Physics, Department of Energy, 2005 (on leave from National Young Investigator Award, 1994. · Natural Sciences and Engineering Research Council of Canada Post University, Halifax, Nova Scotia, Canada, 1979-1983 B. Sc. with Honours in Physics, 1983 · University

  13. Computer Physics Communications 39 (1986) 173--180 173 North-Holland, Amsterdam

    E-Print Network [OSTI]

    Creutz, Michael

    1986-01-01

    FOR THE THREE-DIMENSIONAL ISING MODEL Michael CREUTZ Department of Physics, Brookhaven National Laboratory, Statistics and Computing Science, Daihousie University, Halifax, Nova Scotia B3H 4H8, Canada Received 25 April 1985; in revised form 15 August 1985 PROGRAM SUMMARY Title ofprogram: MICROIS mentary magnets

  14. Securing our energy future? A review of Nova Scotia's energy sector in 2004

    E-Print Network [OSTI]

    Hughes, Larry

    " .......................................................................................... 7 1.4. Liquefied Natural Gas ...........................................................................................4 1. Natural Gas .............................................................................................20 List of figures and tables Figure 1: Monthly offshore natural gas production to May 2005

  15. Freezing in the dark: Energy security and heating emergencies in Nova Scotia

    E-Print Network [OSTI]

    Hughes, Larry

    · Demand side management · Natural gas · Wind and tidal · Grid upgrade · Lower Churchill #12;What Canada, Survey of Household Spending in 2005, 2005 #12;Cost of fuel by quintile 0% 5% 10% 15% 20% 25 assistance programs: ­ "Your energy rebate" ­ Heating Assistance Rebate Program (HARP) ­ Heat Smart

  16. Response to P-887 Adoption of a Fuel Adjustment Mechanism (FAM) for Nova Scotia Power Incorporated

    E-Print Network [OSTI]

    Hughes, Larry

    as estimated by utility Less than estimated Higher than estimated Consumer Pays more per unit of electricity in the price of electricity paid by the consumer. Rather than periodic rate cases, the utility passes fuels companies, regulated utilities are often intended to set rates that will remain in effect for lengthy

  17. Assessing Success in Aquaculture from the Farmer Perspective: The Case of Nova Scotia, Canada

    E-Print Network [OSTI]

    Charles, Anthony

    (Statistics Canada, 2003). Prince Edward Island in the past 25 years has developed a cultivated mussel

  18. MHK Projects/OpenHydro Bay of Fundy Nova Scotia CA | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View NewTexas:Montezuma,Information MHKMHK5 < MHK ProjectsHawaiiInformation Bay of Fundy

  19. Nucleosynthesis in classical novae

    E-Print Network [OSTI]

    M. Hernanz; J. Jose; A. Coc

    2001-01-19

    A general review of the relevance of classical novae for the chemical evolution of the Galaxy, as well as for Galactic radioactivity is presented. A special emphasis is put on the pioneering work done by Jim Truran in this field of research. The impact of recent developments in nuclear astrophysics on nova nucleosynthesis, together with the prospects for observability of novae radioactivities with the INTEGRAL satellite are discussed.

  20. Evolution of the Deep and Bottom Waters of the Scotia Sea, Southern Ocean, during 19952005*

    E-Print Network [OSTI]

    Johnson, Gregory C.

    Evolution of the Deep and Bottom Waters of the Scotia Sea, Southern Ocean, during 1995 the eastern Scotia Sea occupied in 1995, 1999, and 2005 reveals significant variability in the deep and bottom 1995 and 1999 reversed through to 2005, reflecting changes seen earlier upstream in the Weddell Sea

  1. EA-355 Scotia Capital Energy, Inc. | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-inPPL EnergyPlus, LLC to exportEndure Energy, L.L.C. to export electricScotia

  2. On the last mile : the effects of telecommunications regulation and deregulation in the rural western United States and Canada

    E-Print Network [OSTI]

    Kozak, Nadine Irène

    2010-01-01

    Atlantic Provinces are Prince Edward Island, Nova Scotia,Nova Scotia, Prince Edward Island, and Newfoundland and

  3. On the last mile : the effects of telecommunications regulation and deregulation in the rural western United States and Canada

    E-Print Network [OSTI]

    Kozak, Nadine Irène

    2010-01-01

    Provinces are Prince Edward Island, Nova Scotia, and NewNova Scotia, Prince Edward Island, and Newfoundland and

  4. MONITORING STRATIFICATION AND CURRENTS AT THE CONTINENTAL SLOPE OF THE SCOTIA SEA, ANTARCTICA 

    E-Print Network [OSTI]

    Thornton, Melanie 1989-

    2011-05-02

    fulfillment of the requirements for the designation as UNDERGRADUATE RESEARCH SCHOLAR A Senior Scholars Thesis by MELANIE R. THORNTON MONITORING STRATIFICATION AND CURRENTS AT THE CONTINENTAL SLOPE OF THE SCOTIA SEA, ANTARCTICA Approved by... of the requirements for the designation as UNDERGRADUATE RESEARCH SCHOLAR A Senior Scholars Thesis by MELANIE R. THORNTON iii ABSTRACT Monitoring Stratification and Currents at the Continental Slope of the Scotia Sea, Antarctica. (April 2011...

  5. AT Cnc: A SECOND DWARF NOVA WITH A CLASSICAL NOVA SHELL Shara...

    Office of Scientific and Technical Information (OSTI)

    and that at least some classical novae become dwarf novae long after their nova thermonuclear outbursts, in accord with the hibernation scenario of cataclysmic binaries. Here...

  6. Projected impacts of climate change on species distribution in the Acadian Forest region of eastern Nova Scotia

    E-Print Network [OSTI]

    .e., hydrological cycle and earth- sun geometry. Growing degree days and mean air temperature are basedProjected impacts of climate change on species distribution in the Acadian Forest region of eastern on processing remote sensing data, mean air temperatures serves as one of several inputs to model calculation

  7. Evolution of the Deep and Bottom Waters of the Scotia Sea, Southern Ocean, during 19952005*

    E-Print Network [OSTI]

    Naveira Garabato, Alberto

    Evolution of the Deep and Bottom Waters of the Scotia Sea, Southern Ocean, during 1995. The volume of deep waters with potential temperature less than 0°C decreased during 1995­2005, though. These changes are best explained by interannual variations in the deep waters exiting the Weddell Sea

  8. Argonne's Vilas Pol on NOVA!

    ScienceCinema (OSTI)

    None

    2013-04-19

    Can innovations in materials science help clean up our world? Argonne's material scientist Vilas Pol guest starred on NOVA's "Making Stuff: Cleaner," where David Pogue explored the rapidly-developing science and business of clean energy.

  9. NOvA Experiment - The Local Community

    ScienceCinema (OSTI)

    Deb Wieber

    2010-01-08

    Local proprietors Steve and Deb Wieber discuss the impact of the NOvA experiment on their community.

  10. NOVA Making Stuff Season 2

    SciTech Connect (OSTI)

    Leombruni, Lisa; Paulsen, Christine Andrews

    2014-12-12

    Over the course of four weeks in fall 2013, 11.7 million Americans tuned in to PBS to follow host David Pogue as he led them in search of engineering and scientific breakthroughs poised to change our world. Levitating trains, quantum computers, robotic bees, and bomb-detecting plants—these were just a few of the cutting-edge innovations brought into the living rooms of families across the country in NOVA’s four-part series, Making Stuff: Faster, Wilder, Colder, and Safer. Each of the four one-hour programs gave viewers a behind-the-scenes look at novel technologies poised to change our world—showing them how basic research and scientific discovery can hold the keys to transforming how we live. Making Stuff Season 2 (MS2) combined true entertainment with educational value, creating a popular and engaging series that brought accessible science into the homes of millions. NOVA’s goal to engage the public with such technological innovation and basic research extended beyond the broadcast series, including a variety of online, educational, and promotional activities: original online science reporting, web-only short-form videos, a new online quiz-game, social media engagement and promotion, an educational outreach “toolkit” for science educators to create their own “makerspaces,” an online community of practice, a series of nationwide Innovation Cafés, educator professional development, a suite of teacher resources, an “Idealab,” participation in national conferences, and specialized station relation and marketing. A summative evaluation of the MS2 project indicates that overall, these activities helped make a significant impact on the viewers, users, and participants that NOVA reached. The final evaluation conducted by Concord Evaluation Group (CEG) confidently concluded that the broadcast, website, and outreach activities were successful at achieving the project’s intended impacts. CEG reported that the MS2 series and website content were successful in raising awareness and sparking interest in innovation, and increased public awareness that basic research leads to technological innovation; this interest was also sustained over a six month period. Efforts to create an online community of practice were also successful: the quality of collaboration increased, and community members felt supported while using Maker pedagogy. These findings provide clear evidence that large-scale science media projects like MS2 are an effective means of “moving the needle” on attitudes about and excitement for science. NOVA’s broadcast audience and ratings have always indicated that a large portion of the population is interested in and engages with educational science media on a weekly basis. Yet these evaluation results provide the empirical evidence that beyond being capable of attracting, maintaining, and growing a dedicated group of citizens interested in science, these shows—with their diverse content provided on a variety of media channels—are capable of sparking new interest in science, raising public awareness of the importance of science, and maintaining and growing that interest over time. In a country where approximately a quarter of the population doesn’t know the earth rotates around the sun,1 roughly half still don’t accept evolution,2 and about 20% don’t think climate change is happening,3 the importance of these findings cannot be overstated. The success of MS2 suggests that large-scale media projects dedicated to and linked by coverage of scientific “big ideas” are an effective means of shifting public opinion on—and improving understanding of—science. REFERENCES 1, 2 National Science Foundation, Science and Engineering Indicators (2014). Chapter 7: Science and Technology: Public Attitudes and Understanding. 3 Leiserowitz, A., Maibach, E., Roser-Renouf, C., Feinberg, G., & Rosenthal, S. (2014) Climate change in the American mind: April, 2014. Yale University and George Mason University. New Haven, CT: Yale Project on Climate Change Communication.

  11. Horticultural Survey of Gulf Coast. 

    E-Print Network [OSTI]

    Green, Edward C.

    1907-01-01

    e.-lst, cabbage; 2nd, onions; 3rd, Irish potatoes; 4th, CU- cumbers. Sarlta Maria.-lst, onions; 2nd, cucumbers; 3rd, beans; 4th, cabbage. While there is .some difference of opinion among inaiuiduals as to the relative value and profit in certain..., and to Halifax, Nova Scotia, as well as to other markets less distant. SANTA MARIA. For rapid development from 'brush and cactus to in- tensified profitable gardening Kingsville made a two-year record which probably had never been equalled up to that time...

  12. Hopkins Ultraviolet Telescope Observations of Nova Circini 1995 and Nova Aquilae 1995

    E-Print Network [OSTI]

    Hopkins Ultraviolet Telescope Observations of Nova Circini 1995 and Nova Aquilae 1995 Bradford W 1995 and Nova Aql 1995 with the Hopkins Ultraviolet Telescope during the Astro­2 space shuttle mission in 1995 March. The spectra cover the wavelength range from 820 š A to 1840 š A with a spectral resolution

  13. NOVA Portal: Submit VASP Jobs to Carver via the Web

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

    NOVA Portal: Submit VASP Jobs to Carver via the Web NOVA Portal: Submit VASP Jobs to Carver via the Web May 11, 2012 by Francesca Verdier NOVA is an experimental web application...

  14. Title: Canadian Soil Information System (CanSIS) Data Creator /

    E-Print Network [OSTI]

    , Northwest Territories, Nova Scotia, Nunavut, Ontario, Prince Edward Island, Quebec, Saskatchewan, Yukon

  15. Title: Canada Land Inventory: Land Capability for Recreation Data Creator /

    E-Print Network [OSTI]

    and Labrador, Nova Scotia, Ontario, Prince Edward Island, Quebec, Saskatchewan Keywords (Subject): Lakes

  16. library.dal.ca University Archives &

    E-Print Network [OSTI]

    Lotze, Heike K.

    and shipping registers from Nova Scotia, New Brunswick and Prince Edward Island. special collections features

  17. Title: ArcCanada 3.0: National Data Data Creator /

    E-Print Network [OSTI]

    , Northwest Territories, Nova Scotia, Nunavut, Ontario, Prince Edward Island, Quebec, Saskatchewan, Yukon #12

  18. Title: Surficial Materials of Canada (Map 1880A) Data Creator /

    E-Print Network [OSTI]

    Territories, Nova Scotia, Nunavut, Ontario, Prince Edward Island, Quebec, Saskatchewan, Yukon Keywords

  19. Title: CanVec Data Creator /

    E-Print Network [OSTI]

    Territories, Nova Scotia, Nunavut, Ontario, Prince Edward Island, Quebec, Saskatchewan, Yukon #12;Keywords

  20. Title: CanMatrix Data Creator /

    E-Print Network [OSTI]

    and Labrador, Northwest Territories, Nova Scotia, Nunavut, Ontario, Prince Edward Island, Quebec, Saskatchewan

  1. Title: Enhanced Points of Interest: Canada Data Creator /

    E-Print Network [OSTI]

    Territories, Nova Scotia, Nunavut, Ontario, Prince Edward Island, Quebec, Saskatchewan, Yukon #12;Keywords

  2. Title: Platinum Postal Suite Local Delivery Unit (LDU): Canada Data Creator /

    E-Print Network [OSTI]

    , Northwest Territories, Nova Scotia, Nunavut, Ontario, Prince Edward Island, Quebec, Saskatchewan, Yukon

  3. Title: Canada Land Inventory: Land Capability for Waterfowl Wildlife Data Creator /

    E-Print Network [OSTI]

    , Newfoundland and Labrador, Nova Scotia, Ontario, Prince Edward Island, Quebec, Saskatchewan Keywords (Subject

  4. Title: Landsat 7 Orthorectified Imageries over Canada Data Creator /

    E-Print Network [OSTI]

    , Newfoundland and Labrador, Northwest Territories, Nova Scotia, Nunavut, Ontario, Prince Edward Island, Quebec

  5. For Immediate Release April 7, 2015

    E-Print Network [OSTI]

    Law, Wayne

    with provincial and federal governments in Nova Scotia, Prince Edward Island, and several other Canadian provinces

  6. Title: GeoPinpoint Suite Data Creator /

    E-Print Network [OSTI]

    and Labrador, Northwest Territories, Nova Scotia, Nunavut, Ontario, Prince Edward Island, Quebec, Saskatchewan

  7. Near Infrared studies during maximum and early decline of Nova Cephei 2014 and Nova Scorpii 2015

    E-Print Network [OSTI]

    Srivastava, Mudit K; Banerjee, D P K; Sand, D

    2015-01-01

    We present multi-epoch near-infrared photo-spectroscopic observations of Nova Cephei 2014 and Nova Scorpii 2015, discovered in outburst on 2014 March 8.79 UT and 2015 February 11.84 UT respectively. Nova Cep 2014 shows the conventional NIR characteristics of a Fe II class nova characterized by strong CI, HI and O I lines, whereas Nova Sco 2015 is shown to belong to the He/N class with strong He I, HI and OI emission lines. The highlight of the results consists in demonstrating that Nova Sco 2015 is a symbiotic system containing a giant secondary. Leaving aside the T CrB class of recurrent novae, all of which have giant donors, Nova Sco 2015 is shown to be only the third classical nova to be found with a giant secondary. The evidence for the symbiotic nature is three-fold; first is the presence of a strong decelerative shock accompanying the passage of the nova's ejecta through the giant's wind, second is the H$\\alpha$ excess seen from the system and third is the spectral energy distribution of the secondary i...

  8. Shortest recurrence periods of novae

    SciTech Connect (OSTI)

    Kato, Mariko [Department of Astronomy, Keio University, Hiyoshi, Yokohama 223-8521 (Japan); Saio, Hideyuki [Astronomical Institute, Graduate School of Science, Tohoku University, Sendai 980-8578 (Japan); Hachisu, Izumi [Department of Earth Science and Astronomy, College of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902 (Japan); Nomoto, Ken'ichi, E-mail: mariko@educ.cc.keio.ac.jp [Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583 (Japan)

    2014-10-01

    Stimulated by the recent discovery of the 1 yr recurrence period nova M31N 2008-12a, we examined the shortest recurrence periods of hydrogen shell flashes on mass-accreting white dwarfs (WDs). We discuss the mechanism that yields a finite minimum recurrence period for a given WD mass. Calculating the unstable flashes for various WD masses and mass accretion rates, we identified a shortest recurrence period of about two months for a non-rotating 1.38 M {sub ?} WD with a mass accretion rate of 3.6 × 10{sup –7} M {sub ?} yr{sup –1}. A 1 yr recurrence period is realized for very massive (? 1.3 M {sub ?}) WDs with very high accretion rates (? 1.5 × 10{sup –7} M {sub ?} yr{sup –1}). We revised our stability limit of hydrogen shell burning, which will be useful for binary evolution calculations toward Type Ia supernovae.

  9. The NOvA Technical Design Report

    SciTech Connect (OSTI)

    Ayres, D.S.; Drake, G.R.; Goodman, M.C.; Grudzinski, J.J.; Guarino, V.J.; Talaga, R.L.; Zhao, A.; Stamoulis, P.; Stiliaris, E.; Tzanakos, G.; Zois, M.; /Athens U. /Caltech /UCLA /Fermilab /College de France /Harvard U. /Indiana U. /Lebedev Inst. /Michigan State U. /Minnesota U., Duluth /Minnesota U.

    2007-10-08

    Technical Design Report (TDR) describes the preliminary design of the NOvA accelerator upgrades, NOvA detectors, detector halls and detector sites. Compared to the March 2006 and November 2006 NOvA Conceptual Design Reports (CDR), critical value engineering studies have been completed and the alternatives still active in the CDR have been narrowed to achieve a preliminary technical design ready for a Critical Decision 2 review. Many aspects of NOvA described this TDR are complete to a level far beyond a preliminary design. In particular, the access road to the NOvA Far Detector site in Minnesota has an advanced technical design at a level appropriate for a Critical Decision 3a review. Several components of the accelerator upgrade and new neutrino detectors also have advanced technical designs appropriate for a Critical Decision 3a review. Chapter 1 is an Executive Summary with a short description of the NOvA project. Chapter 2 describes how the Fermilab NuMI beam will provide a narrow band beam of neutrinos for NOvA. Chapter 3 gives an updated overview of the scientific basis for the NOvA experiment, focusing on the primary goal to extend the search for {nu}{sub {mu}} {yields} {nu}{sub e} oscillations and measure the sin{sup 2}(2{theta}{sub 13}) parameter. This parameter has not been measured in any previous experiment and NOvA would extend the search by about an order of magnitude beyond the current limit. A secondary goal is to measure the dominant mode oscillation parameters, sin{sup 2}(2{theta}{sub 23}) and {Delta}m{sub 32}{sup 2} to a more precise level than previous experiments. Additional physics goals for NOvA are also discussed. Chapter 4 describes the Scientific Design Criteria which the Fermilab accelerator complex, NOvA detectors and NOvA detector sites must satisfy to meet the physics goals discussed in Chapter 3. Chapter 5 is an overview of the NOvA project. The changes in the design relative to the NOvA CDR are discussed. Chapter 6 summarizes the NOvA design performance relative to the Design Criteria set out in Chapter 4. Chapter 7 presents the Work Breakdown Structure dictionary at Level 3 and the Milestone dictionary. Chapters 8 through 17 then take each Level 2 WBS element of the NOvA project and present each part of the design in more detail than the overview given in Chapter 5. Specific technical design criteria are delineated for each part of the project in addition to the scientific design criteria outlined in Chapter 4. Changes in the design since the NOvA CDR are discussed in detail. The work remaining to bring each part of this preliminary design to a final design is outlined. Appendix A is a guide to other NOvA Project documentation with links to those documents.

  10. Toll free 1-877-867-StFX(7839) PO Box 5000, Antigonish, Nova Scotia, Canada B2G 2W5

    E-Print Network [OSTI]

    .6 Admission from Other Systems of Education 4 1.7 Admission to the Bachelor of Science in Nursing 4 1 of Education Professional Conduct 22 6.6 BachelorofEducationCertification 22 6.7 Diploma in Adult Education 22. Department and Programs ................................30 9.1 Adult Education 30 9.2 Anthropology 30 9

  11. EIS-0339: Presidential Permit Application, GenPower 500 kV Submarine Electric Transmission Cable from Nova Scotia to New York

    Broader source: Energy.gov [DOE]

    The Department of Energy (DOE) announced its intent to prepare an Environmental Impact Statement (EIS) in accordance with the National Environmental Policy Act of 1969 (NEPA) for GenPower New York, L.L.C.’s (GenPower) request for a Presidential permit for a proposed international electric transmission line.

  12. WZ Sge-Type Dwarf Novae

    E-Print Network [OSTI]

    Kato, Taichi

    2015-01-01

    We have summarized the current understanding and recently obtained findings about WZ Sge-type dwarf novae. We also reviewed the historical development of the understanding of these objects, provided the modern criteria, and reviewed the past research in relation to superhumps, early superhumps and the outburst mechanism. We regard that the presence of early superhumps (reflecting the 2:1 resonance) and long or multiple rebrightenings are the best distinguishing properties of WZ Sge-type dwarf novae. We provided the updated list of nearly 100 WZ Sge-type dwarf novae mainly based on the data obtained by the VSNET Collaboration up to Kato et al. (2015, arXiv/1507.05610) and discussed the statistics. We could detect early superhumps with amplitude larger than 0.02 mag in 63% of the studied WZ Sge-type dwarf novae, which makes early superhumps a useful distinguishing feature for WZ Sge-type dwarf novae. Theoretical light curves of early superhumps generally appear to reproduce the existence of many low-amplitude o...

  13. The Expanding Fireball of Nova Delphini 2013

    E-Print Network [OSTI]

    Schaefer, G H; Gies, D R; Farrington, C D; Kloppenborg, B; Chesneau, O; Monnier, J D; Ridgway, S T; Scott, N; Tallon-Bosc, I; McAlister, H A; Boyajian, T; Maestro, V; Mourard, D; Meilland, A; Nardetto, N; Stee, P; Sturmann, J; Vargas, N; Baron, F; Ireland, M; Baines, E K; Che, X; Jones, J; Richardson, N D; Roettenbacher, R M; Sturmann, L; Turner, N H; Tuthill, P; van Belle, G; von Braun, K; Zavala, R T; Banerjee, D P K; Ashok, N M; Joshi, V; Becker, J; Muirhead, P S

    2015-01-01

    A classical nova occurs when material accreting onto the surface of a white dwarf in a close binary system ignites in a thermonuclear runaway. Complex structures observed in the ejecta at late stages could result from interactions with the companion during the common envelope phase. Alternatively, the explosion could be intrinsically bipolar, resulting from a localized ignition on the surface of the white dwarf or as a consequence of rotational distortion. Studying the structure of novae during the earliest phases is challenging because of the high spatial resolution needed to measure their small sizes. Here we report near-infrared interferometric measurements of the angular size of Nova Delphini 2013, starting from one day after the explosion and continuing with extensive time coverage during the first 43 days. Changes in the apparent expansion rate can be explained by an explosion model consisting of an optically thick core surrounded by a diffuse envelope. The optical depth of the ejected material changes ...

  14. Fermilab | Newsroom | Press Releases | March 2013: NOvA Photos

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

    NOvA collaboration. Med Res | Hi Res The NOvA detector, currently under construction in Ash River, Minn., stands about 50 feet tall and 50 feet wide. The completed detector will...

  15. Fermilab | Newsroom | Press Releases | February 2014: NOvA Images

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

    NOvA collaboration Med Res | Hi Res The NOvA detector, currently under construction in Ash River, Minn., stands about 50 feet tall and 50 feet wide. The completed detector will...

  16. Revista Electrnica Nova Scientia Propagacin temporal de algunas enfermedades

    E-Print Network [OSTI]

    Cipolatti, Rolci

    Revista Electrónica Nova Scientia Propagación temporal de algunas enfermedades bacterianas: un: a mathematical model Revista Electrónica Nova Scientia, Nº 8 Vol. 4 (2), 2012. ISSN 2007 - 0705. pp: 42 - 65 - 43;Cipolatti, R. et al. Revista Electrónica Nova Scientia, Nº 8 Vol. 4 (2), 2012. ISSN 2007 - 0705. pp: 42 ­ 65

  17. NOvA: Exploring Neutrino Mysteries

    ScienceCinema (OSTI)

    Vahle, Tricia; Messier, Mark

    2014-08-12

    Neutrinos are a mystery to physicists. They exist in three different flavors and mass states and may be able to give hints about the origins of the matter-dominated universe. A new long-baseline experiment led by Fermilab called NOvA may provide some answers.

  18. THE DWARF NOVA OUTBURSTS OF NOVA HER 1960 (=V446 HER)

    SciTech Connect (OSTI)

    Honeycutt, R. K.; Robertson, J. W.; Kafka, S. E-mail: jrobertson@atu.edu

    2011-04-15

    V446 Her is the best example of an old nova which has developed dwarf nova (DN) eruptions in the post-nova state. We report on observed properties of the long-term light curve of V446 Her, using photometry over 19 years. Yearly averages of the outburst (OB) magnitudes show a decline of {approx}0.013 mag yr{sup -1}, consistent with the decline of other post-novae that do not have DN OBs. Previous suggestions of bimodal distributions of the amplitudes and widths of the OBs are confirmed. The OBs occur at a mean spacing of 18 days but the range of spacings is large (13-30 days). From simulations of DN OBs, it has been predicted that the OB spacing in V446 Her will increase as M-dot from the red dwarf companion slowly falls following the nova; however, the large intrinsic scatter in the spacings serves to hide any evidence of this effect. We do find a systematic change in the OB pattern in which the brighter, wider type of OBs disappeared after late 2003, and this phenomenon is suggested to be due to falling M-dot following the nova.

  19. The Imprint of Nova Nucleosynthesis in Presolar Grains

    E-Print Network [OSTI]

    Jordi Jose; Margarita Hernanz; Sachiko Amari; Katharina Lodders; Ernst Zinner

    2004-05-17

    Infrared and ultraviolet observations of nova light curves have confirmed grain formation in their expanding shells that are ejected into the interstellar medium by a thermonuclear runaway. In this paper, we present isotopic ratios of intermediate-mass elements up to silicon for the ejecta of CO and ONe novae, based on 20 hydrodynamic models of nova explosions. These theoretical estimates will help to properly identify nova grains in primitive meteorites. In addition, equilibrium condensation calculations are used to predict the types of grains that can be expected in the nova ejecta, providing some hints on the puzzling formation of C-rich dust in O>C environments. These results show that SiC grains can condense in ONe novae, in concert with an inferred (ONe) nova origin for several presolar SiC grains.

  20. Improved optical diagnostics for the NOVA laser

    SciTech Connect (OSTI)

    Fernandez, J.C.; Berggren, R.R.; Bradley, K.S.; Hsing, W.W.; Gomez, C.C.; Cobble, J.A.

    1994-07-01

    This paper describes three diagnostics for detecting optical scatter from NOVA laser targets. Detecting such scatter can help not only the authors` understanding of plasma instabilities in laser plasmas, but also their efforts at plasma characterization, particularly hohlraum plasmas. These diagnostics are: the Full Aperture Backscatter Station (FABS), presently being built; the Oblique Scatter Array (OSA), just starting operation; and the Axial Imager, also just starting operation. FABS will allow imaging at high resolution of Brillouin and Raman backscatter. The OSA allows a quantitative measurement of Brillouin and Raman scatter in many directions (assuming the target allows the scatter to escape). The axial imager allows high-resolution imaging of Brillouin, Two-Plasmon Decay and Raman scatter emitted towards the East direction, which is along the symmetry axis of the NOVA laser beams.

  1. Improved optical diagnostics for the NOVA laser

    SciTech Connect (OSTI)

    Fernandez, J.C.; Berggren, R.R.; Bradley, K.S.; Hsing, W.W.; Gomez, C.C.; Cobble, J.A.; Wilke, M.D. )

    1995-01-01

    This paper describes three diagnostics detecting optical scatter from NOVA laser targets. Detecting such scatter can help to understand instabilities in laser plasmas and to characterize such plasmas, particularly hohlraum plasmas. These diagnostics are the full aperture backscatter station (FABS), presently being built; the oblique scatter array (OSA), just starting operation; and the axial imager, also just starting operation. FABS will allow imaging at high resolution of Brillouin and Raman backscatter. The OSA provides a quantitative measurement of Brillouin and Raman scatter in many directions. The axial imager allows high-resolution imaging of Brillouin, two-plasmon decay and Raman scatter emitted toward the direction of the symmetry axis of the NOVA laser beams.

  2. Hubble Space Telescope Observations of Novae in M49

    E-Print Network [OSTI]

    Laura Ferrarese; Patrick Cote; Andres Jordan

    2003-09-30

    A search for novae in M49 (NGC 4472) has been undertaken with the Hubble Space Telescope. A 55-day observing campaign in F555W (19 epochs) and F814W (five epochs) has led to the discovery of nine novae. We find that M49 may be under-abundant in slow, faint novae relative to the Milky Way and M31. Instead, the decline rates of the M49 novae are remarkably similar to those of novae in the LMC. This fact argues against a simple classification of novae in "bulge" and "disk" sub-classes. We examine the Maximum-Magnitude versus Rate of Decline (MMRD) relation for novae in M49, finding only marginal agreement with the Galactic and M31 MMRD relations. A recalibration of the Buscombe-de Vaucouleurs relation gives an absolute magnitude 15 days past maximum of M_{V,15} = -6.36+/-0.19, which is substantially brighter than previous calibrations based on Galactic novae. Monte Carlo simulations yield a global nova rate for M49 of 100{+35}{-30} per year, and a luminosity-specific nova rate in the range \

  3. Getting to know Classical Novae with Swift

    E-Print Network [OSTI]

    Osborne, Julian P

    2015-01-01

    Novae have been reported as transients for more than two thousand years. Their bright optical outbursts are the result of explosive nuclear burning of gas accreted from a binary companion onto a white dwarf. Novae containing a white dwarf close to the Chandrasekhar mass limit and accreting at a high rate are potentially the unknown progenitors of the type Ia supernovae used to measure the acceleration of the Universe. Swift X-ray observations have radically transformed our view of novae by providing dense monitoring throughout the outburst, revealing new phenomena in the super-soft X-rays from the still-burning white dwarf such as early extreme variability and half- to one-minute timescale quasi-periodic oscillations. The distinct evolution of this emission from the harder X-ray emission due to ejecta shocks has been clearly delineated. Soft X-ray observations allow the mass of the white dwarf, the mass burned and the mass ejected to be estimated. In combination with observations at other wavelengths, includi...

  4. Tax Credits, Rebates & Savings | Department of Energy

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

    Community Feed-in Tariff (Nova Scotia, Canada) The Community Feed-In Tariff Program (COMFIT) is designed to increase local ownership of small-scale energy projects in Nova Scotia....

  5. DEFINITIONS Alumni Council

    E-Print Network [OSTI]

    representation of members, consisting of Newfoundland and Labrador, Nova Scotia, New Brunswick, Prince Edward Newfoundland-1; Nova Scotia-4; New Brunswick-2; Prince Edward Island-1; Quebec-1; Ontario-3; Prairies-2

  6. Spectra Nova Technologies Inc | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page| Open Energy Information Serbia-Enhancing CapacityVectren) Jump to: navigation,SouthwoodJump to:NewSpecialSpectra Nova

  7. Api Nova Energia Srl | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar Energy LLC Jump to: navigation,Summaries | Open EnergyRoadmap andApi Nova

  8. NovaTorque | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsourceII Jump to:Information 3rd|Northfork Electric Coop, IncUSA(TXR150000)NovaTorque

  9. Petra Nova Project Breaks Ground on World's Largest Post-Combustion...

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

    Petra Nova Project Breaks Ground on World's Largest Post-Combustion Carbon Capture Project Petra Nova Project Breaks Ground on World's Largest Post-Combustion Carbon Capture...

  10. Nuclear Ashes: Reviewing Thirty Years of Nucleosynthesis in Classical Novae

    E-Print Network [OSTI]

    Jordi Jose

    2002-09-10

    One of the observational evidences in support of the "thermonuclear runaway model" for the classical nova outburst relies on the accompanying nucleosynthesis. In this paper, we stress the relevant role played by nucleosynthesis in our understanding of the nova phenomenon by constraining models through a comparison with both the atomic abundance determinations from the ejecta and the isotopic ratios measured in presolar grains of a likely nova origin. Furthermore, the endpoint of nova nucleosynthesis provides hints for the understanding of the mixing process responsible for the enhanced metallicities found in the ejecta, and reveals also information on the properties of the underlying white dwarf (mass, luminosity...). We discuss first the interplay between nova outbursts and the Galactic chemical abundances: Classical nova outbursts are expected to be the major source of 13C, 15N and 17O in the Galaxy, and to contribute to the abundances of other species with A < 40, such as 7Li or 26Al. We describe the main nuclear path during the course of the explosion, with special emphasis on the synthesis of radioactive species, of particular interest for the gamma-ray output predicted from novae (7Li, 18F, 22Na, 26Al). An overview of the recent discovery of presolar nova candidate grains, as well as a discussion of the role played by nuclear uncertainties associated with key reactions of the NeNa-MgAl and Si-Ca regions, are also given.

  11. GUARANTEED ADMISSION AGREEMENT Northern Virginia Community College (NOVA)

    E-Print Network [OSTI]

    Hammack, Richard

    1 GUARANTEED ADMISSION AGREEMENT Between Northern Virginia Community College (NOVA) And Virginia admission agreement (GAA) establishes a collaborative arrangement between NOVA and VCU for the benefit in Liberal Studies for Early and Elementary Education (LSEE) and Master of Teaching degree in Elementary

  12. The NOvA Experiment: Status and Outlook

    E-Print Network [OSTI]

    R. B. Patterson; for the NOvA Collaboration

    2012-09-04

    The NOvA long-baseline neutrino oscillation experiment is currently under construction and will use an upgraded NuMI neutrino source at Fermilab and a 14-kton detector at Ash River, Minnesota to explore the neutrino sector. NOvA uses a highly active, finely segmented detector design that offers superb event identification capability, allowing precision measurements of \

  13. Cimpor inventa nova frmula para reduzir pegada de CO2

    E-Print Network [OSTI]

    Instituto de Sistemas e Robotica

    Cimpor inventa nova fórmula para reduzir pegada de CO2 CIMENTO. A Cimpor descobriu uma nova fórmula para produzir ci- mento que lhe permitirá reduzir a pegada de CO 2 em 25%. Segundo as contas da as fábricas do grupo, seriam emitidos menos quatro milhões de toneladas de CO 2 por ano, o que permitiria uma

  14. Quark Nova Model for Fast Radio Bursts

    E-Print Network [OSTI]

    Zachary Shand; Amir Ouyed; Nico Koning; Rachid Ouyed

    2015-05-29

    FRBs are puzzling, millisecond, energetic radio transients with no discernible source; observations show no counterparts in other frequency bands. The birth of a quark star from a parent neutron star experiencing a quark nova - previously thought undetectable when born in isolation - provides a natural explanation for the emission characteristics of FRBs. The generation of unstable r-process elements in the quark nova ejecta provides millisecond exponential injection of electrons into the surrounding strong magnetic field at the parent neutron star's light cylinder via $\\beta$-decay. This radio synchrotron emission has a total duration of hundreds of milliseconds and matches the observed spectrum while reducing the inferred dispersion measure by approximately 200 cm$^{-3}$ pc. The model allows indirect measurement of neutron star magnetic fields and periods in addition to providing astronomical measurements of $\\beta$-decay chains of unstable neutron rich nuclei. Using this model, we can calculate expected FRB average energies ($\\sim$ 10$^{41}$ ergs), spectra shapes and provide a theoretical framework for determining distances.

  15. VALUE OF 1970 LANDINGS IN MARITIME PROVINCES SETS RECORD

    E-Print Network [OSTI]

    s and Forestry. The Maritimes are Nova Scotia, New Brunswick, and Prince Edward Island. Preliminary data show

  16. INCIDENCE OF CULL LOBSTERS, HOMARUS AMERICANUS, IN COMMERCIAL AND RESEARCH CATCHES OFF THE MAINE COASTI

    E-Print Network [OSTI]

    that commercially caught lobsters from ports off Nova Scotia and Prince Edward Island had incidences of missing

  17. TIDAL NOVAE IN COMPACT BINARY WHITE DWARFS

    SciTech Connect (OSTI)

    Fuller, Jim; Lai Dong [Department of Astronomy, Cornell University, Ithaca, NY 14850 (United States)

    2012-09-01

    Compact binary white dwarfs (WDs) undergoing orbital decay due to gravitational radiation can experience significant tidal heating prior to merger. In these WDs, the dominant tidal effect involves the excitation of outgoing gravity waves in the inner stellar envelope and the dissipation of these waves in the outer envelope. As the binary orbit decays, the WDs are synchronized from outside in (with the envelope synchronized first, followed by the core). We examine the deposition of tidal heat in the envelope of a carbon-oxygen WD and study how such tidal heating affects the structure and evolution of the WD. We show that significant tidal heating can occur in the star's degenerate hydrogen layer. This layer heats up faster than it cools, triggering runaway nuclear fusion. Such 'tidal novae' may occur in all WD binaries containing a CO WD, at orbital periods between 5 minutes and 20 minutes, and precede the final merger by 10{sup 5}-10{sup 6} years.

  18. Liquid scintillator production for the NOvA experiment

    E-Print Network [OSTI]

    S. Mufson; B. Baugh; C. Bower; T. E. Coan; J. Cooper; L. Corwin; J. A. Karty; P. Mason; M. D. Messier; A. Pla-Dalmau; M. Proudfoot

    2015-06-30

    The NOvA collaboration blended and delivered 8.8 kt (2.72M gal) of liquid scintillator as the active detector medium to its near and far detectors. The composition of this scintillator was specifically developed to satisfy NOvA's performance requirements. A rigorous set of quality control procedures was put in place to verify that the incoming components and the blended scintillator met these requirements. The scintillator was blended commercially in Hammond, IN. The scintillator was shipped to the NOvA detectors using dedicated stainless steel tanker trailers cleaned to food grade.

  19. THE IMPRINT OF NOVA NUCLEOSYNTHESIS IN PRESOLAR GRAINS Jordi Jose

    E-Print Network [OSTI]

    into the interstellar medium by a thermonuclear runaway. In this paper we present isotopic ratios of intermediate Classical novae are powered by thermonuclear runaways (TNRs) that occur on the white dwarf (WD) component

  20. THE INTER-ERUPTION TIMESCALE OF CLASSICAL NOVAE FROM EXPANSION...

    Office of Scientific and Technical Information (OSTI)

    than 1000 years. The intriguing suggestion that Z Cam was a bright nova, recorded by Chinese imperial astrologers in October-November 77 B.C.E., is consistent more with our...

  1. Fermilab | Newsroom | Press Releases | October 6, 2014: NOvA...

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

    courtesy of Fermilab Med Res | Hi Res A view across the top of the NOvA far detector in Ash River, Minnesota. Electronics that make up part of the data acquisition system are...

  2. The transition phase in Nova Muscae 1998, the dust formation in classical novae and a possible link to intermediate polar systems

    E-Print Network [OSTI]

    A. Retter; W. Liller; G. Garradd

    1999-05-28

    We present results of continuous CCD photometry of Nova Muscae 1998 during 17 nights obtained mainly during the transition phase in the light curve of the young nova. We discovered a periodical oscillation with the period 0.16930 day. This result is important for understanding this peculiar stage in the light curve of certain classical novae. We also note a possible connection between the transition / dust phase in nova light curves and intermediate polar systems.

  3. ASPES 2009, Volume 1, Issue 2 ISSN 1937-7991 Editor: Rafic Islam, pp. 2008 Nova Science Publishers, Inc.

    E-Print Network [OSTI]

    Hossain, M. Enamul

    Dalhousie University 1360 Barrington Street, Halifax, NS B3J-2X4, Canada ABSTRACT Natural gas is transported. Another danger to human health lies in the flammability of natural gas transportation systems. A human Publishers, Inc. 127 HUMAN HEALTH RISKS ASSESSMENT DUE TO NATURAL GAS PIPELINES EXPLOSIONS M. Enamul Hossain

  4. Multi-Dimensional Modeling of Nova with Realistic Nuclear Physics

    SciTech Connect (OSTI)

    Zingale, M; Hoffman, R D

    2011-01-27

    This contract covered the period from 03/09/2010 to 09/30/2010. Over this period, we adapted the low Mach number hydrodynamics code MAESTRO to perform simulations of novae. A nova is the thermonuclear runaway of an accreted hydrogen layer on the surface of a white dwarf. As the accreted layer grows in mass, the temperature and density at the base increase to the point where hydrogen fusion can begin by the CNO cycle - a burning process that uses carbon, nitrogen, and oxygen to complete the fusion of four hydrogen nuclei into one helium-4 nucleus. At this point, we are running initial models of nova, exploring the details of the convection. In the follow-on contract to this one, we will continue this investigation.

  5. Halifax Electric Biomass Facility | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View New PagesSustainableGlynn County,SolarFERCInformationVirginia: Energy Resources Jump

  6. Halifax, Massachusetts: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View New PagesSustainableGlynn County,SolarFERCInformationVirginia: Energy Resources

  7. Halifax, Pennsylvania: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View New PagesSustainableGlynn County,SolarFERCInformationVirginia: Energy

  8. Halifax Electric Member Corp | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EA JumpDuimen River Power Co LtdGuntherGreen PowerHipooIAEAMember Corp

  9. nova.tex, 781996. SCATTERING OF LIGHT BY FREE ELECTRONS

    E-Print Network [OSTI]

    Rodriguez, Carlos

    nova.tex, 7­8­1996. SCATTERING OF LIGHT BY FREE ELECTRONS as a Test of Quantum Theory \\Lambda E. T. RELATIVISTIC BASIS OF THE SCHR ¨ ODINGER EQUATION 9 8. NON--ARISTOTELIAN SCATTERING OF LIGHT BY ELECTRONS 10 9 dominates every home and office. But on the other hand, this very fact makes it seem strange that a meeting

  10. CCD Photometry of Nova V1500 Cygni Twenty Years After

    E-Print Network [OSTI]

    I. Semeniuk; A. Olech; M. Nalezyty

    1995-12-14

    We report on CCD photometry of Nova V1500 Cygni obtained in July 1995 to show that twenty years after outburst, being of about 18~mag, the star can still be observed with small telescopes. The 0.1396 day period continues to be stable.

  11. NOvA: Building a Next Generation Neutrino Experiment

    ScienceCinema (OSTI)

    Perko, John; Williams, Ron; Miller, Bill;

    2014-05-30

    The NOvA neutrino experiment is searching for the answers to some of the most fundamental questions of the universe. This video documents how collaboration between government research institutions like Fermilab, academia and industry can create one of the largest neutrino detectors in the world.

  12. Series 50 propane-fueled Nova bus: Engine development, installation, and field trials

    SciTech Connect (OSTI)

    Smith, B.

    1999-01-01

    The report describes a project to develop the Detroit Diesel series 50 liquefied propane gas (LPG) heavy-duty engine and to conduct demonstrations of LPG-fuelled buses at selected sites (Halifax Regional Municipality and three sites in the United States). The project included five main elements: Engine development and certification, chassis re-engineering and engine installation, field demonstration, LPG fuel testing, and LPG fuel variability testing. Lessons learned with regard to engine design and other issues are discussed, and recommendations are made for further development and testing.

  13. VERITAS Observations of the Nova in V407 Cygni

    E-Print Network [OSTI]

    Aliu, E; Arlen, T; Aune, T; Beilicke, M; Benbow, W; Bouvier, A; Bradbury, S M; Buckley, J H; Bugaev, V; Byrum, K; Cannon, A; Cesarini, A; Ciupik, L; Collins-Hughes, E; Connolly, M P; Cui, W; Decerprit, G; Dickherber, R; Duke, C; Dumm, J; Dwarkadas, V V; Errando, M; Falcone, A; Feng, Q; Finley, J P; Finnegan, G; Fortson, L; Furniss, A; Galante, N; Gall, D; Godambe, S; Griffin, S; Grube, J; Gyuk, G; Hanna, D; Holder, J; Huan, H; Hughes, G; Humensky, T B; Kaaret, P; Karlsson, N; Kertzman, M; Khassen, Y; Kieda, D; Krawczynski, H; Krennrich, F; Lang, M J; Lee, K; Maier, G; Majumdar, P; McArthur, S; McCann, A; Millis, J; Moriarty, P; Mukherjee, R; Nuñez, P D; Ong, R A; Orr, M; Otte, A N; Pandel, D; Park, N; Perkins, J S; Pohl, M; Prokoph, H; Quinn, J; Ragan, K; Reyes, L C; Reynolds, P T; Roache, E; Rose, H J; Ruppel, J; Saxon, D B; Schroedter, M; Sembroski, G H; Skole, C; Smith, A W; Staszak, D; Telezhinsky, I; Teši?, G; Theiling, M; Thibadeau, S; Tsurusaki, K; Tyler, J; Varlotta, A; Vincent, S; Vivier, M; Wakely, S P; Ward, J E; Weekes, T C; Weinstein, A; Weisgarber, T; Welsing, R; Williams, D A; Zitzer, B

    2012-01-01

    We report on very high energy (E > 100 GeV) gamma-ray observations of V407 Cygni, a symbiotic binary that underwent a nova outburst producing 0.1-10 GeV gamma rays during 2010 March 10-26. Observations were made with the Very Energetic Radiation Imaging Telescope Array System during 2010 March 19-26 at relatively large zenith angles, due to the position of V407 Cyg. An improved reconstruction technique for large zenith angle observations is presented and used to analyze the data. We do not detect V407 Cygni and place a differential upper limit on the flux at 1.6 TeV of 2.3 \\times 10^(-12) erg cm^(-2) s^(-1) (at the 95% confidence level). When considered jointly with data from Fermi-LAT, this result places limits on the acceleration of very high energy particles in the nova.

  14. On the C/O Enrichment of Novae Ejecta

    E-Print Network [OSTI]

    R. Rosner; A. Alexakis; Y. Young; J. Truran; W. Hillebrandt

    2001-10-31

    Using the results of recent work in shear instabilities in stratified fluids, we show that the resonant interaction between large-scale flows in the accreted H/He envelope of white dwarf stars and interfacial gravity waves can mix with the star's envelope with the white dwarf's surface material, leading to the enhancement of the envelope's C/O abundance to levels required by extant models for nova outbursts.

  15. SWIFT X-RAY OBSERVATIONS OF CLASSICAL NOVAE. II. THE SUPER SOFT SOURCE SAMPLE

    SciTech Connect (OSTI)

    Schwarz, Greg J.; Ness, Jan-Uwe; Osborne, J. P.; Page, K. L.; Evans, P. A.; Beardmore, A. P.; Walter, Frederick M.; Andrew Helton, L.; Woodward, Charles E.; Bode, Mike; Starrfield, Sumner; Drake, Jeremy J.

    2011-12-01

    The Swift gamma-ray burst satellite is an excellent facility for studying novae. Its rapid response time and sensitive X-ray detector provides an unparalleled opportunity to investigate the previously poorly sampled evolution of novae in the X-ray regime. This paper presents Swift observations of 52 Galactic/Magellanic Cloud novae. We included the X-Ray Telescope (0.3-10 keV) instrument count rates and the UltraViolet and Optical Telescope (1700-8000 A) filter photometry. Also included in the analysis are the publicly available pointed observations of 10 additional novae the X-ray archives. This is the largest X-ray sample of Galactic/Magellanic Cloud novae yet assembled and consists of 26 novae with Super Soft X-ray emission, 19 from Swift observations. The data set shows that the faster novae have an early hard X-ray phase that is usually missing in slower novae. The Super Soft X-ray phase occurs earlier and does not last as long in fast novae compared to slower novae. All the Swift novae with sufficient observations show that novae are highly variable with rapid variability and different periodicities. In the majority of cases, nuclear burning ceases less than three years after the outburst begins. Previous relationships, such as the nuclear burning duration versus t{sub 2} or the expansion velocity of the eject and nuclear burning duration versus the orbital period, are shown to be poorly correlated with the full sample indicating that additional factors beyond the white dwarf mass and binary separation play important roles in the evolution of a nova outburst. Finally, we confirm two optical phenomena that are correlated with strong, soft X-ray emission which can be used to further increase the efficiency of X-ray campaigns.

  16. Intial performance from the NOvA surface prototype detector

    SciTech Connect (OSTI)

    Muether, M.; /Fermilab; ,

    2011-09-01

    NOvA, the NuMI Off-Axis {nu}{sub e} Appearance experiment, will study {nu}{sub {mu}} {yields} {nu}{sub e} oscillations characterized by the mixing angle {Theta}{sub 13}. Provided {Theta}{sub 13} is large enough, NOvA may ultimately determine the ordering of the neutrino masses and measure CP violation in neutrino oscillations. A complementary pair of detectors will be constructed {approx}14 mrad off beam axis to optimize the energy profile of the neutrinos. This system consists of a surface based 14 kTon liquid scintillator tracking volume located 810 km from the main injector source (NuMI) in Ash River, Minnesota and a smaller underground 222 Ton near detector at the Fermilab. The first neutrino signals at the Ash River Site are expected prior to the 2012 accelerator shutdown. In the meantime, a near detector surface prototype has been completed and neutrinos from two Fermilab sources have been observed using the same highly segmented PVC and liquid scintillator detector system that will be deployed in the full scale experiment. Design and initial performance characteristics of this prototype system are being fed back into the design for the full NOvA program.

  17. Novae as Tevatrons: Prospects for CTA and IceCube

    E-Print Network [OSTI]

    Metzger, Brian D; Vurm, Indrek; Beloborodov, Andrei; Bartos, Imre; Vlasov, Andrey

    2015-01-01

    The discovery of novae as sources of ~GeV gamma-rays highlights the key role of shocks and relativistic particle acceleration in these transient systems. Although there is evidence for a spectral cut-off above energies ~1-100 GeV at particular epochs in some novae, the maximum particle energy achieved in these accelerators has remained an open question. The high densities of the nova ejecta (~10 orders of magnitude larger than in supernova remnants) render the gas far upstream of the shock neutral and shielded from ionizing radiation. The amplification of the magnetic field needed for diffusive shock acceleration requires ionized gas, thus confining the acceleration process to a narrow photo-ionized layer immediately ahead of the shock. Based on the growth rate in this layer of the hybrid non-resonant cosmic ray current-driven instability (considering also ion-neutral damping), we quantify the maximum particle energy, Emax, across the range of shock velocities and upstream densities of interest. We find value...

  18. THE DUSTY NOVA V1065 CENTAURI (NOVA CEN 2007): A SPECTROSCOPIC ANALYSIS OF ABUNDANCES AND DUST PROPERTIES

    SciTech Connect (OSTI)

    Helton, L. Andrew; Woodward, Charles E.; Gehrz, Robert D.; Walter, Frederick M.; Vanlandingham, Karen; Schwarz, Greg J.; Evans, Aneurin; Ness, Jan-Uwe; Geballe, Thomas R.; Greenhouse, Matthew; Krautter, Joachim; Liller, William; Lynch, David K.; Rudy, Richard J.; Shore, Steven N.; Starrfield, Sumner; Truran, Jim

    2010-11-15

    We examine the ejecta evolution of the classical nova V1065 Centauri, constructing a detailed picture of the system based on spectrophotometric observations obtained from 9 to approximately 900 days post-outburst with extensive coverage from optical to mid-infrared wavelengths. We estimate a reddening toward the system of E(B-V) = 0.5 {+-} 0.1, based upon the B - V color and analysis of the Balmer decrement, and derive a distance estimate of 8.7{sup +2.8}{sub -2.1} kpc. The optical spectral evolution is classified as P {sup o}{sub fe} N{sub ne} A{sub o} according to the CTIO Nova Classification system of Williams et al. Photoionization modeling yields absolute abundance values by number, relative to solar of He/H = 1.6 {+-} 0.3, N/H = 144 {+-} 34, O/H = 58 {+-} 18, and Ne/H = 316 {+-} 58 for the ejecta. We derive an ejected gas mass of M{sub g} = (1.6 {+-} 0.2) x 10{sup -4} M{sub sun}. The infrared excess at late epochs in the evolution of the nova arises from dust condensed in the ejecta composed primarily of silicate grains. We estimate a total dust mass, M{sub d} , of order (0.2-3.7) x 10{sup -7} M{sub sun}, inferred from modeling the spectral energy distribution observed with the Spitzer IRS and Gemini-South GNIRS spectrometers. Based on the speed class, neon abundance, and the predominance of silicate dust, we classify V1065 Cen as an ONe-type classical nova.

  19. The dusty nova V1065 centauri (nova cen 2007) : a spectroscopic analysis of abundances and dust properties.

    SciTech Connect (OSTI)

    Helton, L. A.; Woodward, C. E.; Walter, F. M.; Vanlandingham, K.; Schwarz, G. J.; Evans, A.; Ness, J.-U.; Geballe, T. R.; Gehrz, R. D.; Greenhouse, M.; Krautter, J.; Liller, W.; Lynch, D. K.; Rudy, R. J.; Shore, S. N.; Starrfield, S.; Truran, J. (Physics); (Univ. of Minnesota); (Stony Brook Univ.); (West Chester Univ.); (American Astronomical Society); (Keele Univ.); (European Space Astroomy Centre); (Gemini Observatory); (NASA Goddard Space Flight Center); (Landessternwarte-Zebtrum fur Astronomie der Univ.); (Inst. for Nova Studies); (The Aerospace Corp.); (Univ. di Pisa); (Arizona State Univ.); (Univ. of Chicago)

    2010-10-14

    We examine the ejecta evolution of the classical nova V1065 Centauri, constructing a detailed picture of the system based on spectrophotometric observations obtained from 9 to approximately 900 days post-outburst with extensive coverage from optical to mid-infrared wavelengths. We estimate a reddening toward the system of E(B-V) = 0.5 {+-} 0.1, based upon the B-V color and analysis of the Balmer decrement, and derive a distance estimate of 8.7{sub -2.1}{sup +2.8} kpc. The optical spectral evolution is classified as P{sub fe}{sup o} N{sub ne}A{sub 0} according to the CTIO Nova Classification system of Williams et al. Photoionization modeling yields absolute abundance values by number, relative to solar of He/H = 1.6 {+-} 0.3, N/H = 144 {+-} 34, O/H = 58 {+-} 18, and Ne/H = 316 {+-} 58 for the ejecta. We derive an ejected gas mass of M{sub g} = (1.6 {+-} 0.2) x 10{sup -4} M{circle_dot}. The infrared excess at late epochs in the evolution of the nova arises from dust condensed in the ejecta composed primarily of silicate grains. We estimate a total dust mass, Md , of order (0.2-3.7) x 10{sup -7} M{circle_dot}, inferred from modeling the spectral energy distribution observed with the Spitzer IRS and Gemini-South GNIRS spectrometers. Based on the speed class, neon abundance, and the predominance of silicate dust, we classify V1065 Cen as an ONe-type classical nova.

  20. Thermonuclear Runaways on Accreting White Dwarfs: Models of Classical Novae Explosions

    E-Print Network [OSTI]

    Margarita Hernanz; Jordi Jose

    2000-01-11

    The mechanism of classical novae explosions is explained, together with some of their observational properties. The scarce but not null impact of novae in the chemical evolution of the Milky Way is analyzed, as well as their relevance for the radioactivity in the Galaxy. A special emphasis is given to the predicted gamma-ray emission from novae and its relationship with the thermonuclear model itself and its related nucleosynthesis.

  1. Nucleosynthesis in novae: experimental progress in the determination of nuclear reaction rates

    E-Print Network [OSTI]

    Alain Coc

    2008-01-18

    The sources of nuclear uncertainties in nova nucleosynthesis have been identified using hydrodynamical nova models. Experimental efforts have followed and significantly reduced those uncertainties. This is important for the evaluation of nova contribution to galactic chemical evolution, gamma--ray astronomy and possibly presolar grain studies. In particular, estimations of expected gamma-ray fluxes are essential for the planning of observations with existing or future satellites.

  2. IGR J17098-3628: an X-ray Nova discovered by INTEGRAL

    E-Print Network [OSTI]

    S. A. Grebenev; S. V. Molkov; M. G. Revnivtsev; R. A. Sunyaev

    2007-09-14

    We report the discovery with INTEGRAL on March 24, 2005, and follow-up observations of the distant Galactic X-ray nova IGR J17098-3628.

  3. Detecting Neutrinos with the NOvA Detectors (Other) | SciTech...

    Office of Scientific and Technical Information (OSTI)

    PARTICLES AND FIELDS NOVA; NEUTRINO; NEUTRINO DETECTOR; DETECTOR; COSMIC RAY; NEUTRINO INTERACTION Word Cloud More Like This Multimedia File size NAView Multimedia View Multimedia...

  4. CCD Photometry of Dwarf Nova AL Com in Superoutburst

    E-Print Network [OSTI]

    W. Pych; A. Olech

    1995-09-20

    We report a CCD optical photometry of a dwarf nova AL Com in superoutburst. Before superhumps occurred the light curve was highly variable with dominant periods about 41 minutes and 81.5 minutes for different nights. The period of observed superhumps is 82.5 minutes and seems to be stable. The first harmonic of the basic period is also present. We detected a weak signal corresponding to period 78.1 minutes. One of the periods 78.1 or 81.5 is suspected to be a possible signature of orbital motion in the system.

  5. The peculiar dust shell of Nova DZ Cru (2003).

    SciTech Connect (OSTI)

    Evans, A.; Gehrz, R. D.; Woodward, C. E.; Helton, L. A.; Rushton, M. T.; Bode, M. F.; Krautter, J.; Lyke, J.; Lynch, D. K.; Ness, J.-U.; Starrfield, S.; Truran, J. W.; Wagner, R. M.; Physics; Keele Univ.; Univ. of Minnesota; Univ. of Central Lancashire; Liverpool John Moores Univ.; Zentrum fur Astronomie der Univ. Heidelberg; M. W. Keck Observatory; The Aerospace Corp.; European Space Astronomy Centre; Arizona State Univ.; Univ. of Chicago; Large Binocular Telscope Observatory

    2010-01-01

    We present Spitzer Space Telescope observations of the 'peculiar variable' DZ Cru, identified by Rushton et al. as a classical nova. A dust shell, on which are superimposed a number of features, is prominent in the 5-35 {micro}m range some 4 yr after eruption. We suggest that the dust in DZ Cru is primarily hydrogenated amorphous carbon in which aliphatic bands currently predominate and which may become either predominantly aromatic as the dust is photoprocessed by ultraviolet radiation from the stellar remnant or more likely completely destroyed.

  6. HelioNova S L | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EA JumpDuimen River PowerHeckert BXT SolarHelioNova S L Jump to:

  7. Cataventos Novas Energias Brasil Ltda | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OFAMERICA'SHeavy Electricals Ltd BHEL JumpCMNA PowerCataventos Novas Energias

  8. FEI Nova 200 Dual-Beam SEM/FIB

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submitKansasCommunitiesofExtrans - Permeation Measurement2TargetedFEHM (Finite Nova

  9. Better Buildings Network View, October 2014

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

    Peer Exchange Calls Residential Network Online Group Welcomes 100th Member Outlining Data Needs Optimizes Evaluation Efficiency Nova Scotia Releases Mobile App California...

  10. Better Buildings Residential Network Peer Exchange Call Series...

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

    Ecodrain, Inc. Ecova Efficiency Nova Scotia Elevate Energy emPower Central Coast Energy Coordinating Agency of Philadelphia Energy Efficiency Specialists Environmental Design...

  11. Better Buildings Residential Network Multifamily & Low-Income...

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

    County of San Francisco, CA Community Office for Resource Efficiency (Aspen, CO) Davis Energy Group Efficiency Nova Scotia Elevate Energy (Energy Impact Illinois)...

  12. The Class Idea: Politics, Ideology, and Class Formation in the United States and Canada in the Twentieth Century

    E-Print Network [OSTI]

    Eidlin, Barry

    2012-01-01

    and Labrador, Prince Edward Island, Nova Scotia, NewManitoba, New Brunswick, Prince Edward Island, and Quebec.An eighth jurisdiction, Prince Edward Island, adopted first

  13. BULLETIN OF THE UNITED STATES FISH COMMISSION. 125 With reference to the quantity packed in.the maritime provinces an-

    E-Print Network [OSTI]

    that of the previous year by 1,000,000 cans, that of Nova Scotia by 500,000, and Prince Edward Island by 500,000. Cases

  14. Regional Review on Status and Trends in Aquaculture Development in North America: Canada and the United States of America — 2010

    E-Print Network [OSTI]

    Olin, Paul G.; Smith, James; Nabi, Rashed

    2012-01-01

    26 percent), followed by Prince Edward Island (12 percent),and Labrador, Prince Edward Island, Nova Scotia, and Newthe Atlantic province of Prince Edward Island supplies more

  15. The Class Idea: Politics, Ideology, and Class Formation in the United States and Canada in the Twentieth Century

    E-Print Network [OSTI]

    Eidlin, Barry

    2012-01-01

    and Labrador, Prince Edward Island, Nova Scotia, NewNew Brunswick, Prince Edward Island, and Quebec. Prior toAn eighth jurisdiction, Prince Edward Island, adopted first

  16. Title: Platinum Postal Suite Multiple Enhanced Postal Codes (MEP): Canada Data Creator /

    E-Print Network [OSTI]

    Edward Island, Quebec, Saskatchewan, Yukon Keywords (Subject): Boundaries, Postal Codes, Multiple, New Brunswick, Newfoundland and Labrador, Northwest Territories, Nova Scotia, Nunavut, Ontario, Prince

  17. Regional Review on Status and Trends in Aquaculture Development in North America: Canada and the United States of America — 2010

    E-Print Network [OSTI]

    Olin, Paul G.; Smith, James; Nabi, Rashed

    2012-01-01

    followed by Prince Edward Island (12 percent), Figure 4:and Labrador, Prince Edward Island, Nova Scotia, and NewAtlantic province of Prince Edward Island supplies more than

  18. Metadata Template (Vector and Images) Title: DMTI Census Geography Files 1996

    E-Print Network [OSTI]

    Edward Island, Quebec, Saskatchewan, Yukon Keywords (Subject): Census; Boundaries Restrictions: Data, New Brunswick, Newfoundland and Labrador, Northwest Territories, Nova Scotia, Nunavut, Ontario, Prince

  19. V723 Cas: A dying nova or a new-born SSS? 1 V723 Cas: A dying nova or a new-born SSS?

    E-Print Network [OSTI]

    Ness, Jan-Uwe

    V723 Cas: A dying nova or a new-born SSS? 1 V723 Cas: A dying nova or a new-born SSS? J.-U. Ness, S-rays with Swift and found a clear detection (Ness et al. 2006; 8). There are two possible ex- planations why V723). It can be seen that we have enough sig- #12;2 J.-U. Ness, S.

  20. Submitted to ApJ Letters, June 29, 2005 Are Presolar Silicon Carbide Grains from Novae Actually from Supernovae?

    E-Print Network [OSTI]

    Nittler, Larry R.

    of nucleosynthesis in ONe novae, thermonuclear runaways that occur on O- and Ne-rich white dwarfs in close binary

  1. Swift X-ray and UV monitoring of the Classical Nova V458 Vul (Nova Vul 2007)

    E-Print Network [OSTI]

    Ness, J -U; Beardmore, A P; Boyd, D; Bode, M F; Brady, S; Evans, P A; Gänsicke, B T; Kitamoto, S; Knigge, C; Miller, I; Osborne, J P; Page, K L; Rodríguez-Gil, P; Schwarz, G; Staels, B; Steeghs, D; Takei, D; Tsujimoto, M; Wesson, R; Zijlstra, A

    2009-01-01

    We describe the highly variable X-ray and UV emission of V458 Vul (Nova Vul 2007), observed by Swift between 1 and 422 days after outburst. Initially bright only in the UV, V458 Vul became a variable hard X-ray source due to optically thin thermal emission at kT=0.64 keV with an X-ray band unabsorbed luminosity of 2.3x10^{34} erg s^{-1} during days 71-140. The X-ray spectrum at this time requires a low Fe abundance (0.2^{+0.3}_{-0.1} solar), consistent with a Suzaku measurement around the same time. On day 315 we find a new X-ray spectral component which can be described by a blackbody with temperature of kT=23^{+9}_{-5} eV, while the previous hard X-ray component has declined by a factor of 3.8. The spectrum of this soft X-ray component resembles those typically seen in the class of supersoft sources (SSS) which suggests that the nova ejecta were starting to clear and/or that the WD photosphere is shrinking to the point at which its thermal emission reaches into the X-ray band. We find a high degree of varia...

  2. NOVA-NREL Optimal Vehicle Acquisition Analysis (Brochure)

    SciTech Connect (OSTI)

    Blakley, H.

    2011-03-01

    Federal fleet managers face unique challenges in accomplishing their mission - meeting agency transportation needs while complying with Federal goals and mandates. Included in these challenges are a variety of statutory requirements, executive orders, and internal goals and objectives that typically focus on petroleum consumption and greenhouse gas (GHG) emissions reductions, alternative fuel vehicle (AFV) acquisitions, and alternative fuel use increases. Given the large number of mandates affecting Federal fleets and the challenges faced by all fleet managers in executing day-to-day operations, a primary challenge for agencies and other organizations is ensuring that they are as efficient as possible in using constrained fleet budgets. An NREL Optimal Vehicle Acquisition (NOVA) analysis makes use of a mathematical model with a variety of fleet-related data to create an optimal vehicle acquisition strategy for a given goal, such as petroleum or GHG reduction. The analysis can helps fleets develop a vehicle acquisition strategy that maximizes petroleum and greenhouse gas reductions.

  3. NOvA (Fermilab E929) Official Plots and Figures

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

    The NOvA collaboration, consisting of 180 researchers across 28 institutions and managed by the Fermi National Accelerator Laboratory (FNAL), is developing instruments for a neutrino-focused experiment that will attempt to answer three fundamental questions in neutrino physics: 1) Can we observe the oscillation of muon neutrinos to electron neutrinos; 2) What is the ordering of the neutrino masses; and 3) What is the symmetry between matter and antimatter? The collaboration makes various data plots and figures available. These are grouped under five headings, with brief descriptions included for each individual figure: Neutrino Spectra, Detector Overview, Theta12 Mass Hierarchy CP phase, Theta 23 Delta Msqr23, and NuSterile.

  4. Measurement of ICF fuel ion temperature on Nova

    SciTech Connect (OSTI)

    Harris, D.B.; Chrien, R.E.

    1994-02-01

    A new diagnostic for measuring the average fuel ion temperature in inertial confinement fusion (ICF) targets at the time of peak burn has been constructed by Los Alamos and installed on the Nova Laser System at Lawrence Livermore National Laboratory. This ion-temperature diagnostic measures the time-of-flight of fusion neutrons and determines the thermonuclear-reaction-weighted ion temperature through the time-of-arrival distribution. Preliminary experiments have been designed and performed to test the diagnostic. These tests measured the ion temperature of targets designed to have varying temperatures and yields. Additionally, an experiment has been designed to examine the cause of the increase in yield degradation (compared to clean 1-D calculations) as the capsule convergence is increased. Understanding the cause of yield degradation in high convergence implosions is necessary to increase the confidence of the target performance for the next generation National Ignition Facility planned by the US ICF Program.

  5. The {sup 30}P(p, ?){sup 31}S reaction in classical novae: progress and prospects

    SciTech Connect (OSTI)

    Wrede, C., E-mail: wrede@nscl.msu.edu [Department of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)

    2014-04-15

    The unknown thermonuclear rate of the {sup 30}P(p, ?){sup 31}S reaction at classical-nova temperatures currently prohibits the accurate modeling of nova nucleosynthesis in the A ? 30 region. This is hindering the calibration of nova thermometers based on observed O/S, S/Al, O/P, and P/Al abundance ratios in nova ejecta, the calibration of a meter to probe mixing at the core-envelope interface in novae based on the observed Si/H abundance ratio, and the identification of candidate pre-solar nova grains found in primitive meteorites based on laboratory measurements of their {sup 30}Si/{sup 28}Si isotopic ratios. Each of these diagnostics could address key questions in our understanding of classical novae if the {sup 30}P(p, ?){sup 31}S rate were known. We review progress on the determination of the {sup 30}P(p, ?){sup 31}S rate leading to a critical assessment of current interpretations of published data and prospects for future work.

  6. Observations and Analysis of the GK Persei Nova Shell and its "Jet-like" Feature

    E-Print Network [OSTI]

    Harvey, E; Boumis, P; Akras, S

    2016-01-01

    GK Persei (1901, the 'Firework Nebula') is an old but bright nova remnant that offers a chance to probe the physics and kinematics of nova shells. The kinematics in new and archival longslit optical echelle spectra were analysed using the shape software. New imaging from the Aristarchos telescope continues to track the proper motion, extinction and structural evolution of the knots, which have been observed intermittently over several decades. We present for the first time, kinematical constraints on a large faint 'jet' feature, that was previously detected beyond the shell boundary. These observational constraints allow for the generation of models for individual knots, interactions within knot complexes, and the 'jet' feature. Put together, and taking into account dwarf-nova accelerated winds emanating from the central source, these data and models give a deeper insight into the GK Per nova remnant as a whole.

  7. Fermilab | Newsroom | Press Releases | August 7, 2015: NOvA Images

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

    Fermilab Med Res | Hi Res A view across the top of the NOvA far detector in Ash River, Minnesota. Electronics that make up part of the data acquisition system are...

  8. Early optical spectra of nova V1369 Cen show presence of Lithium

    E-Print Network [OSTI]

    Izzo, L; Mason, E; Matteucci, F; Romano, D; Pasquini, L; Vanzi, L; Jordan, A; Fernandez, J M; Bluhm, P; Brahm, R; Espinoza, N; Williams, R

    2015-01-01

    We present early high resolution spectroscopic observations of the nova V1369 Cen. We have detected an absorption feature at 6695.6 \\AA\\, that we have identified as blue--shifted $^7$Li I $\\lambda$6708 \\AA. The absorption line, moving at -550 km/s, was observed in five high-resolution spectra of the nova obtained at different epochs. On the basis of the intensity of this absorption line we infer that a single nova outburst can inject in the Galaxy $M_{Li} =$ 0.3 - 4.8 $\\times 10^{-10}$ M$_{\\odot}$. Given the current estimates of Galactic nova rate, this amount is sufficient to explain the puzzling origin of the overabundance of Lithium observed in young star populations.

  9. Pulsed power supply for Nova Upgrade. Final report, August 1, 1991 to March 31, 1992

    SciTech Connect (OSTI)

    Bacon, J.L.; Kajs, J.P.; Walls, A.; Weldon, W.F.; Zowarka, R.C.

    1992-12-31

    This report describes work carried out at the Center for Electromechanics at The University of Texas at Austin (CEM-UT). A baseline design of the Nova Upgrade has been completed by Lawrence Livermore National Laboratory. The Nova Upgrade is an 18 beamline Nd: glass laser design utilizing fully relayed 4x4 30 cm aperture segmented optical components. The laser thus consists of 288 independent beamlets nominally producing 1.5 to 2.0 MJ of 0.35 {mu}m light in a 3 to 5 ns pulse. The laser design is extremely flexible and will allow a wide range of pulses to irradiate ICF targets. This facility will demonstrate ignition/gain and the scientific feasibility of ICF for energy and defense applications. The pulsed power requirements for the Nova Upgrade are given. CEM-UT was contracted to study and develop a design for a homopolar generator/inductor (HPG/inductor) opening switch system which would satisfy the pulsed power supply requirements of the Nova Upgrade. The Nd:glass laser amplifiers used in the Nova Upgrade will be powered by light from xenon flashlamps. The pulsed power supply for the Nova Upgrade powers the xenon flashlamps. This design and study was for a power supply to drive flashlamps.

  10. Binary orbits as the driver of gamma-ray emission and mass ejection in classical novae

    E-Print Network [OSTI]

    Chomiuk, Laura; Yang, Jun; O'Brien, T J; Paragi, Zsolt; Mioduszewski, Amy J; Beswick, R J; Cheung, C C; Mukai, Koji; Nelson, Thomas; Ribeiro, Valerio A R M; Rupen, Michael P; Sokoloski, J L; Weston, Jennifer; Zheng, Yong; Bode, Michael F; Eyres, Stewart; Roy, Nirupam; Taylor, Gregory B

    2014-01-01

    Classical novae are the most common astrophysical thermonuclear explosions, occurring on the surfaces of white dwarf stars accreting gas from companions in binary star systems. Novae typically expel ~10^(-4) solar masses of material at velocities exceeding 1,000 kilometres per second. However, the mechanism of mass ejection in novae is poorly understood, and could be dominated by the impulsive flash of thermonuclear energy, prolonged optically thick winds, or binary interaction with the nova envelope. Classical novae are now routinely detected in gigaelectronvolt gamma-ray wavelengths, suggesting that relativistic particles are accelerated by strong shocks in the ejecta. Here we report high-resolution radio imaging of the gamma-ray-emitting nova V959 Mon. We find that its ejecta were shaped by the motion of the binary system: some gas was expelled rapidly along the poles as a wind from the white dwarf, while denser material drifted out along the equatorial plane, propelled by orbital motion. At the interface ...

  11. A tomographic study of the classical nova RR Pic

    E-Print Network [OSTI]

    Fabiola M. A. Ribeiro; Marcos P. Diaz

    2005-10-03

    We present the results of spectrophotometric observations of the old nova RR Pic performed in two spectral ranges, one centered in the Ha line and other covering Hb and Hg spectral lines. From the Hb radial velocity study we found a primary radial semi-amplitude of K1 = 37(1) km/s and a systemic velocity of g = 1.8(2) km/s. With this new values a mass diagram is constructed, constraining the possible mass intervals for the system. The possible orbital inclination range was restricted using the fact that RR Pic presents shallow eclipses. A secondary mass range below the limit of a main sequence star filling its Roche lobe indicate an evolved companion. We also calculated the Ha, Hb, Hg, HeI 6678 and HeII 4686 Doppler tomograms. The most conspicuous differences are found between the HeI and HeII tomograms, the former has a ring shape, while the second is filled at low velocities, suggesting that the low velocity emission is not coming from the accretion disk. Radial emissivity profiles for these lines were also derived.

  12. SWIFT X-RAY AND ULTRAVIOLET MONITORING OF THE CLASSICAL NOVA V458 VUL (NOVA VUL 2007)

    SciTech Connect (OSTI)

    Ness, J.-U. [European Space Astronomy Centre, P.O. Box 78, 28691 Villanueva de la Canada, Madrid (Spain); Drake, J. J. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Beardmore, A. P.; Evans, P. A.; Osborne, J. P.; Page, K. L. [Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH (United Kingdom); Boyd, D. [BAA VSS, 5 Silver Lane, West Challow, Wantage, OX12 9TX (United Kingdom); Bode, M. F. [Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD (United Kingdom); Brady, S. [AAVSO, 5 Melba Drive, Hudson, NH 03051 (United States); Gaensicke, B. T.; Steeghs, D. [Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom); Kitamoto, S.; Takei, D. [Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima, Tokyo 171-8501 (Japan); Knigge, C. [School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ (United Kingdom); Miller, I. [BAA VSS, Furzehill House, Ilston, Swansea SA2 7LE (United Kingdom); Rodriguez-Gil, P. [Isaac Newton Group, PO Ap. de Correos 321, 38700 Sta. Cruz de la Palma (Spain); Schwarz, G. [Department of Geology and Astronomy, West Chester University, West Chester, PA 19383 (United States); Staels, B. [CBA Flanders, Alan Guth Observatory, Koningshofbaan 51, Hofstade, Aalst (Belgium); Tsujimoto, M. [Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802 (United States); Wesson, R. [Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT (United Kingdom)], E-mail: juness@sciops.esa.int (and others)

    2009-05-15

    We describe the highly variable X-ray and UV emission of V458 Vul (Nova Vul 2007), observed by Swift between 1 and 422 days after outburst. Initially bright only in the UV, V458 Vul became a variable hard X-ray source due to optically thin thermal emission at kT = 0.64 keV with an X-ray band unabsorbed luminosity of 2.3 x 10{sup 34} erg s{sup -1} during days 71-140. The X-ray spectrum at this time requires a low Fe abundance (0.2{sup +0.3} {sub -0.1} solar), consistent with a Suzaku measurement around the same time. On day 315 we find a new X-ray spectral component which can be described by a blackbody with temperature of kT = 23{sup +9} {sub -5} eV, while the previous hard X-ray component has declined by a factor of 3.8. The spectrum of this soft X-ray component resembles those typically seen in the class of supersoft sources (SSS) which suggests that the nova ejecta were starting to clear and/or that the white dwarf photosphere is shrinking to the point at which its thermal emission reaches into the X-ray band. We find a high degree of variability in the soft component with a flare rising by an order of magnitude in count rate in 0.2 days. In the following observations on days 342.4-383.6, the soft component was not seen, only to emerge again on day 397. The hard component continued to evolve, and we found an anticorrelation between the hard X-ray emission and the UV emission, yielding a Spearman rank probability of 97%. After day 397, the hard component was still present, was variable, and continued to fade at an extremely slow rate but could not be analyzed owing to pile-up contamination from the bright SSS component.

  13. Some electric myths Larry Hughes

    E-Print Network [OSTI]

    Hughes, Larry

    in residential electricity demand (133 GWh). If these trends continue into the fourth quarter, Nova Scotia Power of the rise in residential electricity demand is the result of the increased use of electricity for space of coal and Nova Scotia's demand for electricity, both of which are based, in part, upon the arguments

  14. Response to Electricity Review Report Draft 18 February 2015 Larry Hughes, PhD

    E-Print Network [OSTI]

    Hughes, Larry

    to the retail market. One of the first outcomes of the public consultations was the Electricity Review Report and organizations have successfully pressured both the provincial government and Nova Scotia Power to address some thermal-coal based electricity supplier, Nova Scotia Power, although still heavily reliant on coal

  15. Isotopic 32S/33S ratio as a diagnostic of presolar grains from novae

    E-Print Network [OSTI]

    A. Parikh; K. Wimmer; T. Faestermann; R. Hertenberger; J. Jose; H. -F. Wirth; C. Hinke; R. Krucken; D. Seiler; K. Steiger; K. Straub

    2014-09-01

    Measurements of sulphur isotopes in presolar grains can help to identify the astrophysical sites in which these grains were formed. A more precise thermonuclear rate of the 33S(p,gamma)34Cl reaction is required, however, to assess the diagnostic ability of sulphur isotopic ratios. We have studied the 33S(3He,d)34Cl proton-transfer reaction at 25 MeV using a high-resolution quadrupole-dipole-dipole-dipole magnetic spectrograph. Deuteron spectra were measured at ten scattering angles between 10 and 55 degrees. Twenty-four levels in 34Cl over Ex = 4.6 - 5.9 MeV were observed, including three levels for the first time. Proton spectroscopic factors were extracted for the first time for levels above the 33S+p threshold, spanning the energy range required for calculations of the thermonuclear 33S(p,gamma)34Cl rate in classical nova explosions. We have determined a new 33S(p,gamma)34Cl rate using a Monte Carlo method and have performed new hydrodynamic nova simulations to determine the impact on nova nucleosynthesis of remaining nuclear physics uncertainties in the reaction rate. We find that these uncertainties lead to a factor of less than 5 variation in the 33S(p,gamma)34Cl rate over typical nova peak temperatures, and variation in the ejected nova yields of S--Ca isotopes by less than 20%. In particular, the predicted 32S/33S ratio is 110 - 130 for the nova model considered, compared to 110 - 440 with previous rate uncertainties. As recent type II supernova models predict ratios of 130 - 200, the 32S/33S ratio may be used to distinguish between grains of nova and supernova origin.

  16. The Turn-off of Classical Novae Observed Through X-rays: Models versus ROSAT Observations of V1974 Cyg

    E-Print Network [OSTI]

    Gloria Sala; Margarita Hernanz

    2004-10-05

    Detection of X-ray emission from classical novae in their post-outburst stages provides crucial information about the nova phenomenon. The soft X-ray emission gives a direct insight into the remaining hot nuclear burning shell. A numerical model for steady H-burning white dwarf envelopes has been developed to study the post-outburst phases of classical novae. Properties of the X-ray emission of the post-nova white dwarf are obtained, and the results are compared to ROSAT observations of V1974 Cyg.

  17. Outburst-related period changes of recurrent nova CI aquilae

    SciTech Connect (OSTI)

    Wilson, R. E.; Honeycutt, R. K., E-mail: honey@astro.indiana.edu, E-mail: rewilson@ufl.edu [Astronomy Department, Indiana University, Swain Hall West, Bloomington, IN 47405 (United States)

    2014-11-01

    Pre-outburst and post-outburst light curves and post-outburst eclipse timings are analyzed to measure any period (P) change related to nova CI Aql's outburst of early 2000 and a mean post-outburst dP/dt, which then lead to estimates of the accreting component's rate of mass (M) change and its overall outburst-related change of mass over roughly a decade of observations. We apply a recently developed procedure for unified analysis of three timing-related data types (light curves, radial velocities, and eclipse timings), although with only light curves and timings in this case. Fits to the data are reasonably good without need for a disk in the light-curve model, although the disk certainly exists and has an important role in our post-outburst mass flow computations. Initial experiments showed that, although there seems to be an accretion hot spot, it has essentially no effect on derived outburst-related ?P or on post-outburst dP/dt. Use of atomic time (HJED) in place of HJD also has essentially nil effect on ?P and dP/dt. We find ?P consistently negative in various types of solutions, although at best only marginally significant statistically in any one experiment. Pre-outburst HJD {sub 0} and P results are given, as are post-outburst HJD {sub 0}, P, and dP/dt, with light curves and eclipse times as joint input, and also with only eclipse time input. Post-outburst dP/dt is negative at about 2.4?. Explicit formulae for mass transfer rates and epoch-to-epoch mass change are developed and applied. A known offset in the magnitude zero point for 1991-1994 is corrected.

  18. Nuclear ashes and outflow in the eruptive star Nova Vul 1670

    E-Print Network [OSTI]

    Kaminski, Tomasz; Tylenda, Romuald; Hajduk, Marcin; Patel, Nimesh A; Kraus, Alexander

    2015-01-01

    CK Vulpeculae was observed in outburst in 1670-16721, but no counterpart was seen until 1982, when a bipolar nebula was found at its location. Historically, CK Vul has been considered to be a nova (Nova Vul 1670), but a similarity to 'red transients', which are more luminous than classical nova and thought to be the result of stellar collisions, has re-opened the question of CK Vul's status. Red transients cool to resemble late M-type stars, surrounded by circumstellar material rich in molecules and dust. No stellar source has been seen in CK Vul, though a radio continuum source was identified at the expansion centre of the nebula. Here we report CK Vul is surrounded by chemically rich molecular gas with peculiar isotopic ratios, as well as dust. The chemical composition cannot be reconciled with a nova or indeed any other known explosion. In addition, the mass of the surrounding gas is too high for a nova, though the conversion from observations of CO to a total mass is uncertain. We conclude that CK Vul is ...

  19. X-ray Study of Rekindled Accretion in the Classical Nova V2491 Cygni

    E-Print Network [OSTI]

    Takei, D; Tsujimoto, M; Kitamoto, S; Drake, J J; Osborne, J P; Takahashi, H; Kinugasa, K

    2011-01-01

    We conducted an X-ray spectroscopic study of the classical nova V2491 Cygni using our target-of-opportunity observation data with the Suzaku and XMM-Newton satellites as well as archived data with the Swift satellite. Medium-resolution (R~10-50) spectra were obtained using the X-ray CCD spectrometers at several post-nova epochs on days 9, 29, 40, 50, and 60-150 in addition to a pre-nova interval between days -322 and -100 all relative to the time when the classical nova was spotted. We found remarkable changes in the time series of the spectra: (a) In the pre-nova phase and on day 9, the 6.7 keV emission line from Fe XXV was significantly detected. (b) On day 29, no such emission line was found. (c) On day 40, the 6.7 keV emission line emerged again. (d) On days 50 and 60-150, three emission lines at 6.4, 6.7, and 7.0 keV respectively from quasi-neutral Fe, Fe XXV, and Fe XXVI were found. Statistically significant changes of the Fe K line intensities were confirmed between day 29 and 50. Based on these phenom...

  20. The Effects of Thermonuclear Reaction Rate Variations on Nova Nucleosynthesis: A Sensitivity Study

    E-Print Network [OSTI]

    Christian Iliadis; Art Champagne; Jordi Jose; Sumner Starrfield; Paul Tupper

    2002-06-03

    We investigate the effects of thermonuclear reaction rate uncertainties on nova nucleosynthesis. One-zone nucleosynthesis calculations have been performed by adopting temperature-density-time profiles of the hottest hydrogen-burning zone (i.e., the region in which most of the nucleosynthesis takes place). We obtain our profiles from 7 different, recently published, hydrodynamic nova simulations covering peak temperatures in the range from Tpeak=0.145-0.418 GK. For each of these profiles, we individually varied the rates of 175 reactions within their associated errors and analyzed the resulting abundance changes of 142 isotopes in the mass range below A=40. In total, we performed 7350 nuclear reaction network calculations. We use the most recent thermonuclear reaction rate evaluations for the mass ranges A=1-20 and A=20-40. For the theoretical astrophysicist, our results indicate the extent to which nova nucleosynthesis calculations depend on presently uncertain nuclear physics input, while for the experimental nuclear physicist our results represent at least a qualitative guide for future measurements at stable and radioactive ion beam facilities. We find that present reaction rate estimates are reliable for predictions of Li, Be, C and N abundances in nova nucleosynthesis. However, rate uncertainties of several reactions have to be reduced significantly in order to predict more reliable O, F, Ne, Na, Mg, Al, Si, S, Cl and Ar abundances. Results are presented in tabular form for each adopted nova simulation.

  1. Construction of AC Motor Controllers for NOvA Experiment Upgrades

    SciTech Connect (OSTI)

    Cooley, Patrick; ,

    2011-08-04

    I have been constructing Alternating Current (AC) motor controllers for manipulation of particle beam detectors. The capability and reliability of these motor controllers are essential to the Laboratory's mission of accurate analysis of the particle beam's position. The device is moved in and out of the beam's path by the motor controller followed by the Neutrinos at the Main Injector Off-Axis {nu}{sub e} Appearance (NOvA) Experiment further down the beam pipe. In total, I built and tested ten ac motor controllers for new beam operations in the NOvA experiment. These units will prove to be durable and provide extremely accurate beam placement for NOvA Experiment far into the future.

  2. Using near detector(s) to predict the far detector events in NOvA experiment

    SciTech Connect (OSTI)

    Djurcic, Zelimir; /Argonne

    2011-01-01

    The NOvA experiment is designed to search for a non-vanishing mixing angle {theta}{sub 13} with unprecedented sensitivity and has the potential to resolve the neutrino mass hierarchy and constrain CP-violation phase. NOvA will use two functionally identical detectors at near and far locations to eliminate sensitivity to modeling of neutrino flux and cross-sections. The near detector will measure neutrino rate to constrain backgrounds expected in the far detector which will search for appearance of electron neutrinos and/or anti-neutrinos using Fermilab NuMI neutrino beam. This report describes initial thoughts on how the available beams and detectors may be used to reach the NOvA goals.

  3. The Impact of Nuclear Reaction Rate Uncertainties on Evolutionary Studies of the Nova Outburst

    E-Print Network [OSTI]

    W. Raphael Hix; Michael S. Smith; Anthony Mezzacappa; Sumner Starrfield; Donald L. Smith

    2000-01-27

    The observable consequences of a nova outburst depend sensitively on the details of the thermonuclear runaway which initiates the outburst. One of the more important sources of uncertainty is the nuclear reaction data used as input for the evolutionary calculations. A recent paper by Starrfield, Truran, Wiescher, & Sparks (1998) has demonstrated that changes in the reaction rate library used within a nova simulation have significant effects, not just on the production of individual isotopes (which can change by an order of magnitude), but on global observables such as the peak luminosity and the amount of mass ejected. We present preliminary results of systematic analyses of the impact of reaction rate uncertainties on nova nucleosynthesis.

  4. Modeling CHANDRA Low Energy Transmission Grating Spectrometer Observations of Classical Novae with PHOENIX

    E-Print Network [OSTI]

    Alexander Petz; Peter H. Hauschildt; Jan-Uwe Ness; Sumner Starrfield

    2005-01-05

    We use the PHOENIX code package to model the X-ray spectrum of Nova V4743 Sagittarii observed with the LETGS onboard the Chandra satellite on 19 March 2003. To analyze nova atmospheres and related systems with an underlying nuclear burning envelope at X-ray wavelengths, it was necessary to update the code with new microphysics. We demonstrate that the X-ray emission is dominated by thermal bremsstrahlung and that the hard X-rays are dominated by Fe and N absorption. Preliminary models are calculated assuming solar abundances. It is shown that the models can be used to determine element abundances in the nova ejecta by increasing the absorption in the shell.

  5. Newly arising problems in the research of SU UMa-type dwarf novae from VSNET collaborations

    E-Print Network [OSTI]

    D. Nogami

    2006-05-10

    Our research on variable objects based on the VSNET collaborations has achieved much progress in understanding the nature of many kinds of phenomena. Many problems have appeared, instead. Among them, we here review three newly arising problems in the research of SU UMa-type dwarf novae: 1) how do EI Psc and V485 Cen evolve as a cataclysmic variable?, 2) is the early superhump a particular phenomenon for WZ Sge-type dwarf novae?, and 3) what parameters determine variations of the superhump period?

  6. jhchang@nova.snu.ac.kr {btzhang,ytkim}@cse.snu.ac.kr Helmholtz machine

    E-Print Network [OSTI]

    jhchang@nova.snu.ac.kr {btzhang,ytkim}@cse.snu.ac.kr Helmholtz machine . Helmholtz machine , . Helmholtz machine . , . (information gain) , Naïve Bayes . 1. (text categorization) . , . k- , Naïve Bayes, , support vector machine, PCA . , . . , . MCMC (Markov Chain Monte Carlo), Variational inference . Helmholtz

  7. Shock-powered radio emission from V5589 Sagittarii (Nova Sgr 2012 #1)

    E-Print Network [OSTI]

    Weston, Jennifer H S; Chomiuk, Laura; Linford, Justin D; Nelson, Thomas; Mukai, Koji; Finzell, Tom; Mioduszewski, Amy; Rupen, Michael P; Walter, Frederick M

    2015-01-01

    Since the Fermi discovery of $\\gamma$-rays from novae, one of the biggest questions in the field has been how novae generate such high-energy emission. Shocks must be a fundamental ingredient. Six months of radio observations of the 2012 nova V5589 Sgr with the VLA and 15 weeks of X-ray observations with Swift/XRT show that the radio emission consisted of: 1) a shock-powered, non-thermal flare; and 2) weak thermal emission from $10^{-5}$ M$_\\odot$ of freely expanding, photoionized ejecta. Absorption features in the optical spectrum and the peak optical brightness suggest that V5589 Sgr lies at 4 kpc (3.2-4.6 kpc). The shock-powered flare was the dominant component in the radio light curve at low frequencies before day 100. The spectral evolution of the flare, its high radio brightness temperature, the presence of unusually hard ($kT_x > 33$ keV) X-rays, and the ratio of radio to X-ray flux near the peak of the flare all support the conclusions that the flare is shock-powered and non-thermal. Unlike other nova...

  8. Solar Sails: una nova manera de navegar per l'espai A. Farres1

    E-Print Network [OSTI]

    Rovira, Carles

    Solar Sails: una nova manera de navegar per l'espai (SIMBa) A. Farr´es1 & `A. Jorba2 1 Institut de Dynamics Station Keeping Surfing + realistic model Conclusions 1 Background on Solar Sails 2 Some comments) Solar Sails SIMBa 2 / 62 #12;Background Dynamics Station Keeping Surfing + realistic model Conclusions

  9. Concurrent Formation of Carbon and Silicate Dust in Nova V1280 Sco

    E-Print Network [OSTI]

    Sakon, Itsuki; Onaka, Takashi; Nozawa, Takaya; Kimura, Yuki; Fujiyoshi, Takuya; Shimonishi, Takashi; Usui, Fumihiko; Takahashi, Hidenori; Ohsawa, Ryou; Arai, Akira; Uemura, Makoto; Nagayama, Takahiro; Koo, Bon-Chul; Kozasa, Takashi

    2015-01-01

    We present infrared multi-epoch observations of the dust forming nova V1280 Sco over $\\sim$2000 days from the outburst. The temporal evolution of the infrared spectral energy distributions at 1272, 1616 and 1947 days can be explained by the emissions produced by amorphous carbon dust of mass (6.6--8.7)$\\times$10$^{-8}$M$_{\\odot}$ with a representative grain size of 0.01$~\\mu$m and astronomical silicate dust of mass (3.4--4.3)$\\times$10$^{-7}$M$_{\\odot}$ with a representative grain size of 0.3--0.5$~\\mu$m. Both of these dust species travel farther away from the white dwarf without an apparent mass evolution throughout those later epochs. The dust formation scenario around V1280 Sco suggested from our analyses is that the amorphous carbon dust is formed in the nova ejecta followed by the formation of silicate dust in the expanding nova ejecta or as a result of the interaction between the nova wind and the circumstellar medium.

  10. The mass of the white dwarf in the old nova BT Mon

    E-Print Network [OSTI]

    D. A. Smith; V. S. Dhillon; T. R. Marsh

    1997-09-22

    We present spectrophotometry of the eclipsing old nova BT Mon (Nova Mon 1939). By detecting weak absorption features from the secondary star, we find its radial velocity semi-amplitude to be K_R = 205+/-5 km/s and its rotational velocity to be vsin i = 138+/-5 km/s. We also measure the radial velocity semi-amplitude of the primary star to be K_R = 170+/-10 km/s. From these parameters we obtain a mass of 1.04+/-0.06 M_sun for the white dwarf primary star and a mass of 0.87+/-0.06 M_sun for the G8V secondary star. The inclination of the system is found to be 82.2+/-3.2 deg and we estimate that the system lies at a distance of 1700+/-300pc. The high mass of the white dwarf and our finding that BT Mon was probably a fast nova together constitute a new piece of evidence in favour of the thermonuclear runaway model of classical nova outbursts. The emission lines are single peaked throughout the orbital cycle, showing absorption around phase 0.5, high velocity S-wave components and large phase offsets in their radial velocity curves. In each of these respects, BT Mon is similar to the SW Sex stars. We also find quasi-periodic flaring in the trailed spectra, which makes BT Mon a candidate intermediate polar.

  11. RAPID DUST FORMATION IN NOVAE: THE SPEED CLASS—FORMATION TIMESCALE CORRELATION EXPLAINED

    SciTech Connect (OSTI)

    Williams, S. C.; Bode, M. F.; Darnley, M. J.; Evans, A.; Zubko, V.; Shafter, A. W.

    2013-11-10

    Observations show that the time of onset of dust formation in classical novae depends strongly on their speed class, with dust typically taking longer to form in slower novae. Using empirical relationships between speed class, luminosity and ejection velocity, it can be shown that dust formation timescale is expected to be essentially independent of speed class. However, following a nova outburst the spectrum of the central hot source evolves, with an increasing proportion of the radiation being emitted short-ward of the Lyman limit. The rate at which the spectrum evolves also depends on the speed class. We have therefore refined the simple model by assuming photons at energies higher than the Lyman limit are absorbed by neutral hydrogen gas internal to the dust formation sites, therefore preventing these photons reaching the nucleation sites. With this refinement the dust formation timescale is theoretically dependent on speed class and the results of our theoretical modification agree well with the observational data. We consider two types of carbon-based dust, graphite and amorphous carbon, with both types producing similar relationships. Our results can be used to predict when dust will form in a nova of a given speed class and hence when observations should optimally be taken to detect the onset of dust formation.

  12. ATriP to Halifax By SaulWilson

    E-Print Network [OSTI]

    Wilson, W. Stephen

    taking some pictures from the far end of the platform, we boarded the last car, a Quiet Car, so I could consist of a mere six Amfleet cars led by a single AEM- 7. (Evidently the temporary elimination of Acela service due to cracks on their brakes had created a serious lack of Amfleet cars; normal trains would have

  13. Halifax County, North Carolina: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View New PagesSustainableGlynn County,SolarFERCInformation

  14. Halifax County, Virginia: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View New PagesSustainableGlynn County,SolarFERCInformationVirginia: Energy Resources Jump to:

  15. Underground study of the 17 O(p,? )18F reaction at Gamow energies for classical novae 

    E-Print Network [OSTI]

    Scott, David Andrew

    2014-11-27

    Classical novae are explained as thermonuclear explosions on the surface of white dwarf stars accreting hydrogen-rich material from less evolved companions in binary star systems. These events occur frequently within our ...

  16. Determining the neutrino mass hierarchy and CP violation in NoVA with a second off-axis detector

    SciTech Connect (OSTI)

    Mena, Olga; /Fermilab; Palomares-Ruiz, Sergio; /Vanderbilt U.; Pascoli, Silvia; /CERN /Durham U., IPPP

    2005-10-01

    We consider a Super-NOVA-like experimental configuration based on the use of two detectors in a long-baseline experiment as NOVA. We take the far detector as in the present NOVA proposal and add a second detector at a shorter baseline. The location of the second off-axis detector is chosen such that the ratio L/E is the same for both detectors, being L the baseline and E the neutrino energy. We consider liquid argon and water- Cerenkov techniques for the second off-axis detector and study, for different experimental setups, the detector mass required for the determination of the neutrino mass hierarchy, for different values of {theta}{sub 13}. We also study the capabilities of such an experimental setup for determining CP-violation in the neutrino sector. Our results show that by adding a second off-axis detector a remarkable enhancement on the capabilities of the current NOVA experiment could be achieved.

  17. High Energy Neutrinos from Novae in Symbiotic Binaries: The Case of V407 Cygni

    E-Print Network [OSTI]

    Soebur Razzaque; Pierre Jean; Olga Mena

    2010-12-07

    Detection of high-energy (~> 100 MeV) gamma rays by the Fermi Large Area Telescope (LAT) from a nova in the symbiotic binary system V407 Cygni has opened possibility of high-energy neutrino detection from this type of sources. Thermonuclear explosion on the white dwarf surface sets off a nova shell in motion that expands and slows down in a dense surrounding medium provided by the red giant companion. Particles are accelerated in the shocks of the shell, and interact with surrounding medium to produce observed gamma rays. We show that proton-proton interaction, which is most likely responsible for producing gamma rays via neutral pion decay, produces ~> 0.1 GeV neutrinos that can be detected by the current and future experiments at ~> 10 GeV.

  18. ELEMENTAL ABUNDANCES IN THE EJECTA OF OLD CLASSICAL NOVAE FROM LATE-EPOCH SPITZER SPECTRA

    SciTech Connect (OSTI)

    Helton, L. Andrew; Vacca, William D.; Gehrz, Robert D.; Woodward, Charles E.; Shenoy, Dinesh P.; Wagner, R. Mark; Evans, Aneurin; Krautter, Joachim; Schwarz, Greg J.; Starrfield, Sumner

    2012-08-10

    We present Spitzer Space Telescope mid-infrared IRS spectra, supplemented by ground-based optical observations, of the classical novae V1974 Cyg, V382 Vel, and V1494 Aql more than 11, 8, and 4 years after outburst, respectively. The spectra are dominated by forbidden emission from neon and oxygen, though in some cases, there are weak signatures of magnesium, sulfur, and argon. We investigate the geometry and distribution of the late time ejecta by examination of the emission line profiles. Using nebular analysis in the low-density regime, we estimate lower limits on the abundances in these novae. In V1974 Cyg and V382 Vel, our observations confirm the abundance estimates presented by other authors and support the claims that these eruptions occurred on ONe white dwarfs (WDs). We report the first detection of neon emission in V1494 Aql and show that the system most likely contains a CO WD.

  19. NOVA: a nonvariational code for solving MHD stability of axisymmetric toroidal plasmas

    SciTech Connect (OSTI)

    Cheng, C.Z.; Chance, M.S.

    1986-04-01

    A nonvariational approach for determining the ideal MHD stability of axisymmetric toroidal confinement systems is presented. The code (NOVA) employs cubic B-spline finite elements and Fourier expansion in a general flux coordinate (psi, theta, zeta) system. Better accuracy and faster convergence were obtained in comparison with the variational PEST and ERATO codes. The nonvariational approach can be extended to problems having non-Hermitian eigenmode equations where variational energy principles cannot be obtained.

  20. Genetic and environmental factors affecting growth and reproduction characters of Morada Nova sheep in Northeastern Brazil 

    E-Print Network [OSTI]

    Fernandes, Antonio Amaury Oria

    1985-01-01

    sheep was raised at the Fazenda Iracema-Sertao Central Research Unit which belongs to the "Empresa de Pesquisa Agropecuaria do Ceara" (EPACE). The Fazenda Iracema is located at Quixada, Ceara, Brazil situ- Table 3 Summary of the Experimental Morada... collected over a 6-year period (1979-1984) from the Morada Nova sheep flock (Figure 2) maintained by the Experimental Research Unit of the "Empresa de Pesquisa Agropecuaria do Ceara" (EPACE) at the Experimental Iracema Farm, Quixada, Ceara, Brazil...

  1. Superhumps and Repetitive Rebrightenings of the WZ Sge-Type Dwarf Nova, EG Cancri

    E-Print Network [OSTI]

    T. Kato; D. Nogami; K. Matsumoto; H. Baba

    2003-10-15

    We report on time-resolved photometric observations of the WZ Sge-type dwarf nova, EG Cnc (Huruhata's variable, see also http://www.kusastro.kyoto-u.ac.jp/vsnet/DNe/egcnc.html), during its superoutburst in 1996-1997. EG Cnc, after the main superoutburst accompanied with development of superhumps typical of a WZ Sge-type dwarf nova, exhibited a series of six major rebrightenings. During these rebrightenings and the following long fading tail, EG Cnc persistently showed superhumps having a period equal to the superhump period observed during the main superoutburst. The persistent superhumps had a constant superhump flux with respect to the rebrightening phase. These findings suggest the superhumps observed during the rebrightening stage and the fading tail are a "remnant" of usual superhumps, and are not newly triggered by rebrightenings. By comparison with the 1977 outburst of this object and outbursts of other WZ Sge-type dwarf novae, we propose an activity sequence of WZ Sge-type superoutbursts, in which the current outburst of EG Cnc is placed between a single-rebrightening event and distinct outbursts separated by a dip. The post-superoutburst behavior of WZ Sge-type dwarf novae can be understood in the presence of considerable amount of remnant matter behind the cooling front in the outer accretion disk, even after the main superoutburst. We consider the premature quenching of the hot state due to the weak tidal effect under the extreme mass ratio of the WZ Sge-type binary is responsible for the origin of the remnant mass.

  2. Photometry of the dwarf nova AW Sagittae during the 2006 November superoutburst

    E-Print Network [OSTI]

    Jeremy Shears; Roger Pickard; Tom Krajci; Gary Poyner

    2007-05-31

    During 2006 November an outburst of the dwarf nova AW Sge was observed using CCD photometry. This revealed 0.25 magnitude superhumps confirming it to be a superoutburst, possibly only the second confirmed such outburst of this star. The superhumps were observed for 4 days and had a stable period Psh = 0.0745(2)d, a value which is consistent with Psh measured during the 2000 superoutburst.

  3. Nuclear structure of 30S and its implications for nucleosynthesis in classical novae

    E-Print Network [OSTI]

    K. Setoodehnia; A. A. Chen; D. Kahl; T. Komatsubara; J. José; R. Longland; Y. Abe; D. N. Binh; J. Chen; S. Cherubini; J. A. Clark; C. M. Deibel; S. Fukuoka; T. Hashimoto; T. Hayakawa; J. Hendriks; Y. Ishibashi; Y. Ito; S. Kubono; W. N. Lennard; T. Moriguchi; D. Nagae; R. Nishikiori; T. Niwa; A. Ozawa; P. D. Parker; D. Seiler; T. Shizuma; H. Suzuki; C. Wrede; H. Yamaguchi; T. Yuasa

    2012-10-03

    The uncertainty in the 29P(p,gamma)30S reaction rate over the temperature range of 0.1 - 1.3 GK was previously determined to span ~4 orders of magnitude due to the uncertain location of two previously unobserved 3+ and 2+ resonances in the 4.7 - 4.8 MeV excitation region in 30S. Therefore, the abundances of silicon isotopes synthesized in novae, which are relevant for the identification of presolar grains of putative nova origin, were uncertain by a factor of 3. To investigate the level structure of 30S above the proton threshold (4394.9(7) keV), a charged-particle spectroscopy and an in-beam gamma-ray spectroscopy experiments were performed. Differential cross sections of the 32S(p,t)30S reaction were measured at 34.5 MeV. Distorted wave Born approximation calculations were performed to constrain the spin-parity assignments of the observed levels. An energy level scheme was deduced from gamma-gamma coincidence measurements using the 28Si(3He,n-gamma)30S reaction. Spin-parity assignments based on measurements of gamma-ray angular distributions and gamma-gamma directional correlation from oriented nuclei were made for most of the observed levels of 30S. As a result, the resonance energies corresponding to the excited states in 4.5 MeV - 6 MeV region, including the two astrophysically important states predicted previously, are measured with significantly better precision than before. The uncertainty in the rate of the 29P(p,gamma)30S reaction is substantially reduced over the temperature range of interest. Finally, the influence of this rate on the abundance ratios of silicon isotopes synthesized in novae are obtained via 1D hydrodynamic nova simulations.

  4. Non-Thermal Radio Emission from Colliding Flows in Classical Nova V1723 Aql

    E-Print Network [OSTI]

    Weston, Jennifer H S; Metzger, Brian D; Zheng, Yong; Chomiuk, Laura; Krauss, Miriam I; Linford, Justin; Nelson, Thomas; Mioduszewski, Amy; Rupen, Michael P; Finzell, Tom; Mukai, Koji

    2015-01-01

    The importance of shocks in nova explosions has been highlighted by the recent discovery of \\gamma-ray producing novae by Fermi. We use over three years of multi-band radio observations of nova V1723 Aql with the Karl G. Jansky Very Large Array (VLA) to show that shocks between fast and slow flows within the ejecta led to the acceleration of particles and the production of synchrotron radiation. Approximately one month after the start of V1723 Aql's eruption in 2010 September, shocks in the ejecta produced an unexpected radio flare, ultimately resulting in a radio light curve with a multi-peaked structure. More than a year after the start of the eruption, the radio emission became consistent with emanating from an expanding thermal remnant with a mass of $2\\times10^{-4}$ M$_\\odot$ and a temperature of $10^4$ K. However, the brightness temperature of greater than $10^6$ K at low frequencies during the first two months was too high to be due to thermal emission from the small amount of X-ray producing shock-hea...

  5. Recycler Chromaticities and End Shims for NOvA at Fermilab

    SciTech Connect (OSTI)

    Xiao, M.; /Fermilab

    2012-05-01

    In era of NOvA operation, it is planned to slip-stack six on six Booster proton batches in the Recycler ring for a total intensity of 5 x 10{sup 13} protons/cycle. During the slip-stacking, the chromaticities are required to be jumped from (-2,-2) to (-20,-20). However, with the existing 2 families of powered sextupoles in the lattice, the chromaticities can only be adjusted to (-12,-12) from (-2,-2). On the other hand, the presently designed Recycler lattice for Nova replaces the 30 straight section with 8 'D-D half FODO cells'. With the limit of the feasible quad strength, 3 quads in a half-cell were used to obtain the working point under, and the maximum beta-functions in this section cannot be less than 80 m. In this paper, we re-designed the end shims of the permanent magnets in the ring lattice with appropriate quadrupole and sextupole components to meet both chromaticity and tune requirements. We are able to use 2 quads in a half cell in RR30 straight section within feasible quad strength. The maximum beta-functions are also lowered to around 55 m. The dynamic aperture tracking has been done using MAD to simulate the scenario of beam injection into the Recycler ring for Nova.

  6. Thermal radio emission from novae & symbiotics with the Square Kilometre Array

    E-Print Network [OSTI]

    O'Brien, Tim; Chomiuk, Laura; Ribeiro, Valerio; Bode, Michael; Sokoloski, Jennifer; Woudt, Patrick

    2015-01-01

    The thermal radio emission of novae during outburst enables us to derive fundamental quantities such as the ejected mass, kinetic energy, and density profile of the ejecta. Recent observations with newly-upgraded facilities such as the VLA and e-MERLIN are just beginning to reveal the incredibly complex processes of mass ejection in novae (ejections appear to often proceed in multiple phases and over prolonged timescales). Symbiotic stars can also exhibit outbursts, which are sometimes accompanied by the expulsion of material in jets. However, unlike novae, the long-term thermal radio emission of symbiotics originates in the wind of the giant secondary star, which is irradiated by the hot white dwarf. The effect of the white dwarf on the giant's wind is strongly time variable, and the physical mechanism driving these variations remains a mystery (possibilities include accretion instabilities and time-variable nuclear burning on the white dwarf's surface). The exquisite sensitivity of SKA1 will enable us to su...

  7. X-Ray Emitting Blast Wave from the Recurrent Nova RS Ophiuchi

    E-Print Network [OSTI]

    J. L. Sokoloski; G. J. M. Luna; K. Mukai; Scott J. Kenyon

    2006-05-30

    Stellar explosions such as novae and supernovae produce most of the heavy elements in the Universe. Although the onset of novae from runaway thermonuclear fusion reactions on the surface of a white dwarf in a binary star system is understood[1], the structure, dynamics, and mass of the ejecta are not well known. In rare cases, the white dwarf is embedded in the wind nebula of a red-giant companion; the explosion products plow through the nebula and produce X-ray emission. Early this year, an eruption of the recurrent nova RS Ophiuchi[2,3] provided the first opportunity to perform comprehensive X-ray observations of such an event and diagnose conditions within the ejecta. Here we show that the hard X-ray emission from RS Ophiuchi early in the eruption emanates from behind a blast wave, or outward-moving shock wave, that expanded freely for less than 2 days and then decelerated due to interaction with the nebula. The X-rays faded rapidly, suggesting that the blast wave deviates from the standard spherical shell structure[4-6]. The early onset of deceleration indicates that the ejected shell had a low mass, the white dwarf has a high mass[7], and that RS Ophiuchi is a progenitor of the type of supernova integral to studies of the expansion of the universe.

  8. THE 2001-2003 LOW STATE OF NOVA LACERTAE 1950 (DK LAC)

    SciTech Connect (OSTI)

    Honeycutt, R. K.; Jacobson, H.; Hoffman, D.; Maxwell, T.; Croxall, K.; Kafka, S.; Henden, A. A.; Robertson, J. W. E-mail: jacob189@msu.edu E-mail: tmaxwell@astro.indiana.edu E-mail: skafka@dtm.ciw.edu E-mail: Jeff.Robertson@atu.edu

    2011-04-15

    We report on extensive photometry of DK Lac obtained during the interval 1990-2009, which includes a 2 mag low state during 2001-2003. Much of the photometry consists of exposures obtained with a typical spacing of several days, but also includes 26 sequences of continuous photometry each lasting 2-7 hr. We find no evidence for periodicities in our data. We do find that the random variations in the low state are approximately twice those in the high state, when expressed in magnitudes. The lack of orbital-timescale variations is attributed to the nearly face-on presentation of the disk. There is a 0.2 mag decline in the high-state brightness of the system over 19 years, which is consistent with the behavior of other old novae in the decades following outburst. High-state spectra are also presented and discussed. We find that the equivalent width of H{alpha} falls by about double from 1991 to 2008. The photometric properties are discussed in the context of the hibernation scenario for the behavior of novae between outbursts, in which we conclude that low states in old novae are probably unrelated to their possible entrance into hibernation.

  9. The 1991-2012 light curve of the old nova HR Lyrae

    SciTech Connect (OSTI)

    Honeycutt, R. K.; Shears, J.; Kafka, S.; Robertson, J. W.; Henden, A. A. E-mail: bunburyobservatory@hotmail.com E-mail: Jeff.Robertson@atu.edu

    2014-05-01

    The 22 yr light curve of HR Lyr, acquired with a typical cadence of 2-6 days, is examined for periodic and quasi-periodic variations. No persistent periodicities are revealed. Rather, the light curve variations often take the form of nearly linear rises and falls having typical e-folding times of about 100 days. Occasional ?0.6 mag outbursts are also seen, with properties similar to those of small outbursts found in some nova-like cataclysmic variables. When the photometry is formed into yearly averages, a decline of 0.012 ± 0.005 mag yr{sup –1} is apparent, consistent with the fading of irradiation-induced M-dot following the nova. The equivalent width of H? is tabulated at three epochs over the interval 1986-2008 in order to compare with a recent result for DK Lac in which H? was found to be fading 50 yr after the nova. However, our results for such a fading in HR Lyr are inconclusive.

  10. Gamma-ray novae as probes of relativistic particle acceleration at non-relativistic shocks

    E-Print Network [OSTI]

    Metzger, Brian D; Vurm, Indrek; Hascoet, Romain; Beloborodov, Andrei M; Chomiuk, Laura

    2015-01-01

    The Fermi LAT discovery that classical novae produce >100 MeV gamma-rays establishes that shocks and relativistic particle acceleration are key features of these events. These shocks are likely to be radiative due to the high densities of the nova ejecta at early times coincident with the gamma-ray emission. Thermal X-rays radiated behind the shock are absorbed by neutral gas and reprocessed into optical emission, similar to Type IIn (interacting) supernovae. The ratio of gamma-ray and optical luminosities, L_gam/L_opt, thus sets a lower limit on the fraction of the shock power used to accelerate relativistic particles, e_nth. The measured values of L_gam/L_opt for two classical novae, V1324 Sco and V339 Del, constrains e_nth > 1e-2 and > 1e-3, respectively. Inverse Compton models for the gamma-ray emission are disfavored given the low electron acceleration efficiency, e_nth ~ 1e-4-1e-3, inferred from observations of Galactic cosmic rays and particle-in-cell (PIC) numerical simulations. Recent hybrid PIC simu...

  11. HUBBLE SPACE TELESCOPE FAR ULTRAVIOLET SPECTROSCOPY OF THE RECURRENT NOVA T PYXIDIS

    SciTech Connect (OSTI)

    Godon, Patrick; Sion, Edward M. [Astronomy and Astrophysics, Villanova University, Villanova, PA 19085 (United States); Starrfield, Sumner [School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287 (United States); Livio, Mario; Williams, Robert E. [Space Telescope Science Institute, Baltimore, MD 21218 (United States); Woodward, Charles E. [Minnesota Institute for Astrophysics, University of Minnesota, Minneapolis, MN 55455 (United States); Kuin, Paul [Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT (United Kingdom); Page, Kim L., E-mail: patrick.godon@villanova.edu, E-mail: edward.sion@villanova.edu, E-mail: sumner.starrfield@asu.edu, E-mail: mlivio@stsci.edu, E-mail: wms@stsci.edu, E-mail: chelsea@astro.umn.edu, E-mail: n.kuin@ucl.ac.uk, E-mail: klp5@leicester.ac.uk [Department of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH (United Kingdom)

    2014-04-01

    With six recorded nova outbursts, the prototypical recurrent nova T Pyxidis (T Pyx) is the ideal cataclysmic variable system to assess the net change of the white dwarf mass within a nova cycle. Recent estimates of the mass ejected in the 2011 outburst ranged from a few ?10{sup –5} M {sub ?} to 3.3 × 10{sup –4} M {sub ?}, and assuming a mass accretion rate of 10{sup –8}-10{sup –7} M {sub ?} yr{sup –1} for 44 yr, it has been concluded that the white dwarf in T Pyx is actually losing mass. Using NLTE disk modeling spectra to fit our recently obtained Hubble Space Telescope COS and STIS spectra, we find a mass accretion rate of up to two orders of magnitude larger than previously estimated. Our larger mass accretion rate is due mainly to the newly derived distance of T Pyx (4.8 kpc, larger than the previous 3.5 kpc estimate), our derived reddening of E(B – V) = 0.35 (based on combined IUE and GALEX spectra), and NLTE disk modeling (compared to blackbody and raw flux estimates in earlier works). We find that for most values of the reddening (0.25 ? E(B – V) ? 0.50) and white dwarf mass (0.70 M {sub ?} ? M {sub wd} ? 1.35 M {sub ?}) the accreted mass is larger than the ejected mass. Only for a low reddening (?0.25 and smaller) combined with a large white dwarf mass (0.9 M {sub ?} and larger) is the ejected mass larger than the accreted one. However, the best results are obtained for a larger value of reddening.

  12. MULTIWAVELENGTH PHOTOMETRY AND HUBBLE SPACE TELESCOPE SPECTROSCOPY OF THE OLD NOVA V842 CENTAURUS

    SciTech Connect (OSTI)

    Sion, Edward M. [Department of Astronomy and Astrophysics, Villanova University, 800 Lancaster Avenue, Villanova, PA 19085 (United States); Szkody, Paula; Mukadam, Anjum [Department of Astronomy, University of Washington, Seattle, WA 98195 (United States); Warner, Brian; Woudt, Patrick [Astrophysics, Cosmology and Gravity Centre, Department of Astronomy, University of Cape Town, Private Bag X3, Rondebosch 7701 (South Africa); Walter, Frederic [Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794 (United States); Henden, Arne [AAVSO 49 Bay State Road, Cambridge, MA 02138 (United States); Godon, Patrick, E-mail: edward.sion@villanova.edu, E-mail: szkody@astro.washington.edu, E-mail: anjum@astro.washington.edu, E-mail: brian.warner@uct.ac.za, E-mail: pwoudt@ast.uct.ac.za, E-mail: frederick.walter@stonybrook.edu, E-mail: arne@aavso.edu [Department of Astronomy and Astrophysics, Villanova University, Villanova, PA 19085 (United States)

    2013-08-01

    We present ground-based optical and near infrared photometric observations and Hubble Space Telescope (HST) COS spectroscopic observations of the old nova V842 Cen (Nova Cen 1986). Analysis of the optical light curves reveals a peak at 56.5 {+-} 0.3 s with an amplitude of 8.9 {+-} 4.2 mma, which is consistent with the rotation of a magnetic white dwarf primary in V842 Cen that was detected earlier by Woudt et al., and led to its classification as an intermediate polar. However, our UV lightcurve created from the COS time-tag spectra does not show this periodicity. Our synthetic spectral analysis of an HST COS spectrum rules out a hot white dwarf photosphere as the source of the FUV flux. The best-fitting model to the COS spectrum is a full optically thick accretion disk with no magnetic truncation, a low disk inclination angle, low accretion rate and a distance less than half the published distance that was determined on the basis of interstellar sodium D line strengths. Truncated accretion disks with truncation radii of 3 R{sub wd} and 5 R{sub wd} yielded unsatisfactory agreement with the COS data. The accretion rate is unexpectedly low for a classical nova only 24 yr after the explosion when the accretion rate is expected to be high and the white dwarf should still be very hot, especially if irradiation of the donor star took place. Our low accretion rate is consistent with those derived from X-ray and ground-based optical data.

  13. Radio frequency models of novae in eruption. I. The free-free process in bipolar morphologies

    SciTech Connect (OSTI)

    Ribeiro, V. A. R. M.; Simon, T.; Woudt, P. A.; Chomiuk, L.; Munari, U.; Steffen, W.; Koning, N.; O'Brien, T. J.; Bode, M. F.

    2014-09-01

    Observations of novae at radio frequencies provide us with a measure of the total ejected mass, density profile, and kinetic energy of a nova eruption. The radio emission is typically well characterized by the free-free emission process. Most models to date have assumed spherical symmetry for the eruption, although for as long as there have been radio observations of these systems, it has been known that spherical eruptions are too simplistic a geometry. In this paper, we build bipolar models of the nova eruption, assuming the free-free process, and show the effects of varying different parameters on the radio light curves. The parameters considered include the ratio of the minor- to major-axis, the inclination angle, and shell thickness. We also show the uncertainty introduced when fitting spherical-model synthetic light curves to bipolar-model synthetic light curves. We find that the optically thick phase rises with the same power law (S {sub ?}?t {sup 2}) for both the spherical and bipolar models. In the bipolar case, there is a 'plateau' phase—depending on the thickness of the shell as well as the ratio of the minor- to major-axis—before the final decline, which follows the same power law (S {sub ?}?t {sup –3}) as in the spherical case. Finally, fitting spherical models to the bipolar-model synthetic light curves requires, in the worst-case scenario, doubling the ejected mass, more than halving the electron temperature, and reducing the shell thickness by nearly a factor of 10. This implies that in some systems we have been over-predicting the ejected masses and under-predicting the electron temperature of the ejecta.

  14. Detection of a 5-Hz QPO from X-ray Nova GRS 1739-278

    E-Print Network [OSTI]

    K. N. Borozdin; S. P. Trudolyubov

    2000-03-08

    The X-ray nova GRS1739-278 flared up near the Galactic center in the spring of 1996. Here we report on the discovery of a ~5-Hz quasi-periodic oscillations (QPO) in RXTE/PCA observations of GRS1739-278. The QPO were only present when the source was in its very high state, and disappeared later, when it made a transition down into the high state. We present the energy spectra of this black hole candidate measured in both high and very high states, and discuss the similarities between this system and other X-ray transients.

  15. Classical novae and type I X-ray bursts: Challenges for the 21st century

    SciTech Connect (OSTI)

    Parikh, A., E-mail: anuj.r.parikh@upc.edu; José, J., E-mail: jordi.jose@upc.edu; Sala, G., E-mail: gloria.sala@upc.edu [Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya (EUETIB), E-08036 Barcelona (Spain); Institut d’Estudis Espacials de Catalunya (IEEC), E-08034 Barcelona (Spain)

    2014-04-15

    Classical nova explosions and type I X-ray bursts are the most frequent types of thermonuclear stellar explosions in the Galaxy. Both phenomena arise from thermonuclear ignition in the envelopes of accreting compact objects in close binary star systems. Detailed observations of these events have stimulated numerous studies in theoretical astrophysics and experimental nuclear physics. We discuss observational features of these phenomena and theoretical efforts to better understand the energy production and nucleosynthesis in these explosions. We also examine and summarize studies directed at identifying nuclear physics quantities with uncertainties that significantly affect model predictions.

  16. Modeling CHANDRA Low Energy Transmission Grating Spectrometer Observations of Classical Novae with PHOENIX. I. V4743 Sagittarii

    E-Print Network [OSTI]

    Alexander Petz; Peter H. Hauschildt; Jan-Uwe Ness; Sumner Starrfield

    2004-10-15

    We use the PHOENIX code package to model the X-ray spectrum of Nova V4743 Sagittarii observed with the LETGS onboard the Chandra satellite on March 2003. Our atmosphere models are 1D spherical, expanding, line blanketed, and in full NLTE. To analyze nova atmospheres and related systems with an underlying nuclear burning envelope at X-ray wavelengths, it was necessary to update the code with new microphysics, as discussed in this paper. We demonstrate that the X-ray emission is dominated by thermal bremsstrahlung and that the hard X-rays are dominated by Fe and N absorption. The best fit to the observation is provided at a temperature of T_eff = 5.8 x 10^5 K, with L_bol = 50 000 L_sun. The models are calculated for solar abundances. It is shown that the models can be used to determine abundances in the nova ejecta.

  17. HST Fine Guidance Sensor Astrometric Parallaxes for Three Dwarf Novae: SS Aurigae, SS Cygni, and U Geminorum

    E-Print Network [OSTI]

    Thomas E. Harrison; Bernard J. McNamara; Paula Szkody; Barbara J. McAurthur; G. F. Benedict; Arnold R. Klemola; Ronald L. Gilliland

    1999-02-16

    We report astrometric parallaxes for three well known dwarf novae obtained using the Fine Guidance Sensors on the Hubble Space Telescope. We found a parallax for SS Aurigae of Pi = 5.00 +/- 0.64 mas, for SS Cygni we found Pi = 6.02 +/- 0.46 mas, and for U Geminorum we obtained Pi = 10.37 +/- 0.50 mas. These represent the first true trigonometric parallaxes of any dwarf novae. We briefly compare these results with previous distance estimates. This program demonstrates that with a very modest amount of HST observing time, the Fine Guidance Sensors can deliver parallaxes of unrivaled precision.

  18. GRB 080503 late afterglow re-brightening: signature of a magnetar powered merger-nova

    E-Print Network [OSTI]

    Gao, He; Wu, Xue-Feng; Dai, Zi-Gao; Zhang, Bing

    2015-01-01

    GRB 080503 is a short gamma-ray burst (GRB) detected by \\emph{Swift} and has been classified as a compact-star-merger-origin GRB. The soft extended emission and the simultaneous late re-brightening in both the X-ray and optical afterglow lightcurves raise interesting questions regarding its physical origin. We show that the broad-band data of GRB 080503 can be well explained within the framework of the double neutron star merger model, provided that the merger remnant is a rapidly-rotating massive neutron star with an extremely high magnetic field (i.e. a millisecond magnetar). We show that the late optical re-brightening is consistent with the emission from a magnetar-powered "merger-nova". This adds one more case to the growing sample of merger-novae associated with short GRBs. The soft extended emission and the late X-ray excess emission are well connected through a magnetar dipole spin-down luminosity evolution function, suggesting that direct magnetic dissipation is the mechanism to produce these X-rays....

  19. Short-period X-ray oscillations in super-soft novae and persistent SSS

    E-Print Network [OSTI]

    Ness, J -U; Osborne, J P; Kuulkers, E; Henze, M; Piro, A L; Drake, J J; Dobrotka, A; Schwarz, G; Starrfield, S; Kretschmar, P; Hirsch, M; Wilms, J

    2015-01-01

    Transient short-period <100s oscillations have been found in the X-ray light curves of three novae during their SSS phase and in one persistent SSS. We pursue an observational approach to determine possible driving mechanisms and relations to fundamental system parameters such as the white dwarf mass. We performed a systematic search for short-period oscillations in all available XMM-Newton and Chandra X-ray light curves of persistent SSS and novae during their SSS phase. To study time evolution, we divided each light curve into short time segments and computed power spectra. We then constructed dynamic power spectra from which we identified transient periodic signals even when only present for a short time. From all time segments of each system, we computed fractions of time when periodic signals were detected. In addition to the previously known systems with short-period oscillations, RS Oph (35s), KT Eri (35s), V339 Del (54s), and Cal 83 (67s), we found one additional system, LMC 2009a (33s), and also c...

  20. Suzaku observation of the classical nova V2491 Cyg in quiescence

    E-Print Network [OSTI]

    Zemko, Polina; Orio, Marina

    2015-01-01

    We present Suzaku XIS observation of V2491 Cyg (Nova Cyg 2008 No. 2) obtained in quiescence, more than two years after the outburst. The nova was detected as a very luminous source in a wide spectral range from soft to hard X-rays. A very soft blackbody-like component peaking at 0.5 keV indicates that either we observe remaining, localized hydrogen burning on the surface of the white dwarf, or accretion onto a magnetized polar cap. In the second case, V2491 Cyg is a candidate "soft intermediate polar". We obtained the best fit for the X-ray spectra with several components: two of thermal plasma, a blackbody and a complex absorber. The later is typical of intermediate polars. The X-ray light-curve shows a modulation with a $\\sim$38 min period. The amplitude of this modulation is strongly energy dependent and reaches maximum in the 0.8--2.0 keV range. We discuss the origin of the X-ray emission and pulsations, and the likelihood of the intermediate polar scenario.

  1. X-Ray Spectroscopy of the Classical Nova V458 Vulpeculae with Suzaku

    E-Print Network [OSTI]

    Tsujimoto, Masahiro; Drake, Jeremy J; Ness, Jan-Uwe; Kitamoto, Shunji

    2008-01-01

    We conducted a target of opportunity X-ray observation of the classical nova V458 Vulpeculae 88 days after the explosion using the Suzaku satellite. With a 20 ks exposure, the X-ray Imaging Spectrometer detected X-ray emission significantly harder than typical super-soft source emission. The X-ray spectrum shows K lines from N, Ne, Mg, Si, and S, and L-series emission from Fe in highly ionized states. The spectrum can be described by a single temperature (0.64 keV) thin thermal plasma model in collisional equilibrium with a hydrogen-equivalent extinction column density of ~3e21/cm2, a flux of ~1e-12 erg/s/cm2, and a luminosity of ~6e34 erg/s in the 0.3-3.0 keV band at an assumed distance of 13 kpc. We found a hint of an enhancement of N and deficiencies of O and Fe relative to other metals. The observed X-ray properties can be interpreted as the emission arising from shocks of ejecta from an ONe-type nova.

  2. Photoionization Heating of Nova Ejecta by the Post-Outburst Supersoft Source

    E-Print Network [OSTI]

    Cunningham, Timothy; Bildsten, Lars

    2015-01-01

    The expanding ejecta from a classical nova remains hot enough ($\\sim10^{4}\\, {\\rm K}$) to be detected in thermal radio emission for up to years after the cessation of mass loss triggered by a thermonuclear instability on the underlying white dwarf (WD). Nebular spectroscopy of nova remnants confirms the hot temperatures observed in radio observations. During this same period, the unstable thermonuclear burning transitions to a prolonged period of stable burning of the remnant hydrogen-rich envelope, causing the WD to become, temporarily, a super-soft X-ray source. We show that photoionization heating of the expanding ejecta by the hot WD maintains the observed nearly constant temperature of $(1-4)\\times10^4\\mathrm{~K}$ for up to a year before an eventual decline in temperature due to either the cessation of the supersoft phase or the onset of a predominantly adiabatic expansion. We simulate the expanding ejecta using a one-zone model as well as the Cloudy spectral synthesis code, both incorporating the time-d...

  3. MULTIPLICITY OF NOVA ENVELOPE SOLUTIONS AND OCCURRENCE OF OPTICALLY THICK WINDS

    SciTech Connect (OSTI)

    Kato, Mariko; Hachisu, Izumi E-mail: hachisu@ea.c.u-tokyo.ac.jp

    2009-07-10

    We revisit the occurrence condition of optically thick winds reported by Kato in 1985 and Kato and Hachisu in 1989 who mathematically examined nova envelope solutions with an old opacity and found that optically thick winds are accelerated only in massive white dwarfs (WDs) of {approx}>0.9 M{sub sun}. With the OPAL opacity we find that the optically thick wind occurs for {approx}>0.6 M{sub sun} WDs and that the occurrence of winds depends not only on the WD mass but also on the ignition mass. When the ignition mass is larger than a critical value, winds are suppressed by a density-inversion layer. Such a static solution can be realized in WDs of mass {approx}0.6-0.7 M{sub sun}. We propose that sequences consisting only of static solutions correspond to slow evolutions in symbiotic novae like PU Vul because PU Vul shows no indication of strong winds in a long-lasted flat peak followed by a very slow decline in its light curve.

  4. X-Ray Spectroscopy of the Classical Nova V458 Vulpeculae with Suzaku

    E-Print Network [OSTI]

    Masahiro Tsujimoto; Dai Takei; Jeremy J. Drake; Jan-Uwe Ness; Shunji Kitamoto

    2008-10-17

    We conducted a target of opportunity X-ray observation of the classical nova V458 Vulpeculae 88 days after the explosion using the Suzaku satellite. With a 20 ks exposure, the X-ray Imaging Spectrometer detected X-ray emission significantly harder than typical super-soft source emission. The X-ray spectrum shows K lines from N, Ne, Mg, Si, and S, and L-series emission from Fe in highly ionized states. The spectrum can be described by a single temperature (0.64 keV) thin thermal plasma model in collisional equilibrium with a hydrogen-equivalent extinction column density of ~3e21/cm2, a flux of ~1e-12 erg/s/cm2, and a luminosity of ~6e34 erg/s in the 0.3-3.0 keV band at an assumed distance of 13 kpc. We found a hint of an enhancement of N and deficiencies of O and Fe relative to other metals. The observed X-ray properties can be interpreted as the emission arising from shocks of ejecta from an ONe-type nova.

  5. Quantifying atmospheric pollution across north america from boreal forest fires: a combined analysis of atmospheric modelling and ground-based remote sensing 

    E-Print Network [OSTI]

    Trigwell, Robert

    2011-11-24

    This paper describes the interpretation of the 2010 summer LIDAR observations from Dal- housie University, Nova Scotia. The GEOS-Chem global 3D chemistry transport model was used to identify the chemical and optical ...

  6. Personal Health Information Act (PHIA) and Research

    E-Print Network [OSTI]

    Brownstone, Rob

    Personal Health Information Act (PHIA) and Research Dalhousie Research Ethics Board Presented Information Act ­ Provincial privacy legislation under the Nova Scotia Department of Health and Wellness health information for planning or research. · Follows the pattern of protection adopted by various

  7. DOE/CETC/CANDRA Workshop on Microturbine Applications January 21-23, 2003 ~ Calgary, Alberta, Canada

    E-Print Network [OSTI]

    Pennycook, Steve

    Energy General Hospital 30 kW Mariah CHP operating on Light Fuel Oil Chuck Faulkner, Nova Scotia Power Inc Alliance Canada #12;January 21 DOE/CETC/CANDRA Workshop on Microturbine Applications Agenda Wednesday

  8. Teaching Humanities in Medicine: The University of Massachusetts Family Medicine Residency Program Experience

    E-Print Network [OSTI]

    Silk, Hugh; Shields, Sara

    2012-01-01

    Charon R. Narrative and medicine. N Eng J Med 2004;350:862-California, Irvine, College of Medicine. Acad Med. 2003;78:University Faculty of Medicine, Nova Scotia, Canada, 1992–

  9. 46 Marine Fisheries Review Introduction

    E-Print Network [OSTI]

    , three companies, one in Massachusetts, one in New Brunswick, and one on Prince Edward Island, Canada), Scotland (Edwards, 1997), and in Atlantic Canada (Quebec, New- foundland, Nova Scotia), and also St. Pierre

  10. American Fisheries Society Symposium 79:185203, 2012 2012 by the American Fisheries Society

    E-Print Network [OSTI]

    Townsend, David W.

    of Oceanography Post Office Box 1006, 1 Challenger Drive, Dartmouth, Nova Scotia B2Y 4A2, Canada Neal r. Pettigrew of Oceanography Post Office Box 1006, Dartmouth, Nova Scotia B2Y 4A2, Canada DaviD w. towNSeND School of Marine Sciences, University of Maine Orono, Maine 04469, USA guoqi haN Northwest Atlantic Fisheries Center Post

  11. The 2011 outburst of recurrent nova T PYX: Radio observations reveal the ejecta mass and hint at complex mass loss

    SciTech Connect (OSTI)

    Nelson, Thomas [School of Physics and Astronomy, University of Minnesota, 116 Church St. SE, Minneapolis, MN 55455 (United States); Chomiuk, Laura [Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824 (United States); Roy, Nirupam; Krauss, Miriam I.; Mioduszewski, Amy J.; Rupen, Michael P. [National Radio Astronomy Observatory, P.O. Box O, Socorro, NM 87801 (United States); Sokoloski, J. L.; Weston, Jennifer [Columbia Astrophysics Laboratory, Columbia University, New York, NY (United States); Mukai, Koji, E-mail: tnelson@physics.umn.edu [Center for Space Science and Technology, University of Maryland Baltimore County, Baltimore, MD 21250 (United States)

    2014-04-10

    Despite being the prototype of its class, T Pyx is arguably the most unusual and poorly understood recurrent nova. Here, we use radio observations from the Karl G. Jansky Very Large Array to trace the evolution of the ejecta over the course of the 2011 outburst of T Pyx. The radio emission is broadly consistent with thermal emission from the nova ejecta. However, the radio flux began rising surprisingly late in the outburst, indicating that the bulk of the radio-emitting material was either very cold, or expanding very slowly, for the first ?50 days of the outburst. Considering a plausible range of volume filling factors and geometries for the ejecta, we find that the high peak flux densities of the radio emission require a massive ejection of (1-30) × 10{sup –5} M {sub ?}. This ejecta mass is much higher than the values normally associated with recurrent novae, and is more consistent with a nova on a white dwarf well below the Chandrasekhar limit.

  12. Getting the most from NOvA and T2K

    SciTech Connect (OSTI)

    Mena, Olga; /Fermilab

    2006-09-01

    The determination of the ordering of the neutrino masses (the hierarchy) is probably a crucial prerequisite to understand the origin of lepton masses and mixings and to establish their relationship to the analogous properties in the quark sector. In this talk, we follow an alternative strategy to the usual neutrino-antineutrino comparison: we exploit the combination of the neutrino-only data from the NOvA and the T2K experiments by performing these two off-axis experiments at different distances but at the same /L, being the mean neutrino energy and L the baseline. This would require a minor adjustment to the proposed off-axis angle for one or both of the proposed experiments.

  13. NOvA and T2K: The Race for the neutrino mass hierarchy

    SciTech Connect (OSTI)

    Mena, Olga; /Fermilab; Nunokawa, Hiroshi; /Rio de Janeiro, Pont. U. Catol.; Parke, Stephen J.; /Fermilab

    2006-09-01

    The determination of the ordering of the neutrino masses (the hierarchy) is probably a crucial prerequisite to understand the origin of lepton masses and mixings and to establish their relationship to the analogous properties in the quark sector. Here, we follow an alternative strategy to the usual neutrino-antineutrino comparison in long baseline neutrino oscillation experiments: we exploit the combination of the neutrino-only data from the NOvA and the T2K experiments by performing these two off-axis experiments at different distances but at the same /L, where is the mean neutrino energy and L is the baseline. This would require a minor adjustment to the proposed off-axis angle for one or both of the proposed experiments.

  14. BRIGHT 'MERGER-NOVA' FROM THE REMNANT OF A NEUTRON STAR BINARY MERGER: A SIGNATURE OF A NEWLY BORN, MASSIVE, MILLISECOND MAGNETAR

    SciTech Connect (OSTI)

    Yu, Yun-Wei [Institute of Astrophysics, Central China Normal University, Wuhan 430079 (China)] [Institute of Astrophysics, Central China Normal University, Wuhan 430079 (China); Zhang, Bing; Gao, He, E-mail: yuyw@mail.ccnu.edu.cn, E-mail: zhang@physics.unlv.edu [Department of Physics and Astronomy, University of Nevada, Las Vegas, NV 89154 (United States)] [Department of Physics and Astronomy, University of Nevada, Las Vegas, NV 89154 (United States)

    2013-10-20

    A massive millisecond magnetar may survive the merger of a neutron star (NS) binary, which would continuously power the merger ejecta. We develop a generic dynamic model for the merger ejecta with energy injection from the central magnetar. The ejecta emission (the {sup m}erger-nova{sup )} powered by the magnetar peaks in the UV band and the peak of the light curve, progressively shifts to an earlier epoch with increasing frequency. A magnetar-powered merger-nova could have an optical peak brightness comparable to a supernova, which is a few tens or hundreds times brighter than the radioactive-powered merger-novae (the so-called macro-nova or kilo-nova). On the other hand, such a merger-nova would peak earlier and have a significantly shorter duration than that of a supernova. An early collapse of the magnetar could suppress the brightness of the optical emission and shorten its duration. Such millisecond-magnetar-powered merger-novae may be detected from NS-NS merger events without an observed short gamma-ray burst, and could be a bright electromagnetic counterpart for gravitational wave bursts due to NS-NS mergers. If detected, it suggests that the merger leaves behind a massive NS, which has important implications for the equation-of-state of nuclear matter.

  15. Non-LTE model atmosphere analysis of the early ultraviolet spectra of nova OS Andromedae 1986

    E-Print Network [OSTI]

    Greg Schwarz; Peter H. Hauschildt; Sumner Starrfield; Eddie Baron; France Allard; Steve Shore; George Sonneborn

    1996-08-29

    We have analyzed the early optically thick ultraviolet spectra of Nova OS And 1986 using a grid of spherically symmetric, non-LTE, line-blanketed, expanding model atmospheres and synthetic spectra with the following set of parameters: $5,000\\le$ T$_{model}$ $\\le 60,000$K, solar abundances, $\\rho \\propto r^{-3}$, $\\v_{max} = 2000\\kms$, $L=6 \\times 10^{4}\\Lsun$, and a statistical or microturbulent velocity of 50 $\\kms$. We used the synthetic spectra to estimate the model parameters corresponding to the observed {\\it IUE} spectra. The fits to the observations were then iteratively improved by changing the parameters of the model atmospheres, in particular T$_{model}$ and the abundances, to arrive at the best fits to the optically thick pseudo-continuum and the features found in the {\\it IUE} spectra. The {\\it IUE} spectra show two different optically thick subphases. The earliest spectra, taken a few days after maximum optical light, show a pseudo-continuum created by overlapping absorption lines. The later observations, taken approximately 3 weeks after maximum light, show the simultaneous presence of allowed, semi-forbidden, and forbidden lines in the observed spectra. Analysis of these phases indicate that OS And 86 had solar metallicities except for Mg which showed evidence of being underabundant by as much as a factor of 10. We determine a distance of 5.1 kpc to OS And 86 and derive a peak bolometric luminosity of $\\sim$ 5 $\\times$ 10$^4$ L$_{\\odot}$. The computed nova parameters provide insights into the physics of the early outburst and explain the spectra seen by {\\it IUE}. Lastly, we find evidence in the later observations for large non-LTE effects of Fe{\\sc ii} which, when included, lead to much better agreement with the observations.

  16. Discovery of $^{34g,m}$Cl$(p,?)^{35}$Ar resonances activated at classical nova temperatures

    E-Print Network [OSTI]

    C. Fry; C. Wrede; S. Bishop; B. A. Brown; A. A. Chen; T. Faestermann; R. Hertenberger; A. Parikh; D. Pérez-Loureiro; H. -F. Wirth; A. García; R. Ortez

    2015-10-14

    Background: The thermonuclear $^{34g,m}$Cl($p,\\gamma$)$^{35}$Ar reaction rates are unknown due to a lack of experimental nuclear physics data. Uncertainties in these rates translate to uncertainties in $^{34}$S production in models of classical novae on oxygen-neon white dwarfs. $^{34}$S abundances have the potential to aid in the classification of presolar grains. Purpose: Determine resonance energies for the $^{34g,m}$Cl($p,\\gamma$)$^{35}$Ar reactions within the region of astrophyical interest for classical novae to a precision of a few keV as an essential first step toward constraining their thermonuclear reaction rates. Method: $^{35}$Ar excited states were populated by the $^{36}$Ar($d,t$)$^{35}$Ar reaction at $E$(d)=22~MeV and reaction products were momentum analyzed by a high resolution quadrupole-dipole-dipole-dipole (Q3D) magnetic spectrograph. Results: Seventeen new $^{35}$Ar levels have been detected at a statistically significant level in the region $E_x\\approx$~5.9-6.7~MeV ($E_r$ \\textless~800~ keV) and their excitation energies have been determined to typical uncertainties of 3~keV. The uncertainties for five previously known levels have also been reduced substantially. The measured level density was compared to those calculated using the WBMB Hamiltonian within the $sd-pf$ model space. Conclusions: Most of the resonances in the region of astrophyical interest have likely been discovered and their energies have been determined, but the resonance strengths are still unknown, and experimentally constraining the $^{34g,m}$Cl($p,\\gamma$)$^{35}$Ar reaction rates will require further experiments.

  17. FROM X-RAY DIPS TO ECLIPSE: WITNESSING DISK REFORMATION IN THE RECURRENT NOVA U Sco

    SciTech Connect (OSTI)

    Ness, J.-U.; Talavera, A.; Gonzalez-Riestra, R. [XMM-Newton Science Operations Centre, ESA, P.O. Box 78, 28691 Villanueva de la Canada, Madrid (Spain); Schaefer, B. E. [Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803 (United States); Dobrotka, A. [Department of Physics, Institute of Materials Science, Faculty of Materials Science and Technology, Slovak University of Technology, Jana Bottu 25, 91724 Trnava (Slovakia); Sadowski, A. [N. Copernicus Astronomical Center, Polish Academy of Sciences, Bartycka 18, 00-716 Warszawa (Poland); Drake, J. J.; Barnard, R. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Page, K. L. [Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH (United Kingdom); Hernanz, M. [Institut de Ciencies de l'Espai (CSIC-IEEC), Campus UAB, Facultat de Ciencies, C5 parell 2on, 08193 Bellaterra (Barcelona) (Spain); Sala, G. [Departament Fisica i Enginyeria Nuclear, EUETIB (UPC-IEEC), Comte d'Urgell 187, 08036 Barcelona (Spain); Starrfield, S., E-mail: juness@sciops.esa.int [School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287-1404 (United States)

    2012-01-20

    The tenth recorded outburst of the recurrent eclipsing nova U Sco was observed simultaneously in X-ray, UV, and optical by XMM-Newton on days 22.9 and 34.9 after the outburst. Two full passages of the companion in front of the nova ejecta were observed, as was the reformation of the accretion disk. On day 22.9, we observed smooth eclipses in UV and optical but deep dips in the X-ray light curve that disappeared by day 34.9, yielding clean eclipses in all bands. X-ray dips can be caused by clumpy absorbing material that intersects the line of sight while moving along highly elliptical trajectories. Cold material from the companion could explain the absence of dips in UV and optical light. The disappearance of X-ray dips before day 34.9 implies significant progress in the formation of the disk. The X-ray spectra contain photospheric continuum emission plus strong emission lines, but no clear absorption lines. Both continuum and emission lines in the X-ray spectra indicate a temperature increase from day 22.9 to day 34.9. We find clear evidence in the spectra and light curves for Thompson scattering of the photospheric emission from the white dwarf. Photospheric absorption lines can be smeared out during scattering in a plasma of fast electrons. We also find spectral signatures of resonant line scattering that lead to the observation of the strong emission lines. Their dominance could be a general phenomenon in high-inclination systems such as Cal 87.

  18. Scotia Wind Ltd | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OFAMERICA'SHeavyAgency (IRENA)OptionsEquivalentBScira Offshore Energy Jump

  19. Full aperture backscatter station imager diagnostics system for far-field imaging of laser plasma instabilities on Nova

    SciTech Connect (OSTI)

    Wilke, M.D.; Fernandez, J.C.; Berggren, R.R.; Horton, R.F.; Montgomery, D.S.; Faulkner, J.A.; Looney, L.D.; Jimerson, J.R.

    1997-01-01

    In ICF, the understanding of laser plasma scattering processes is essential for laser target coupling and for controlling the symmetry of indirect drive implosions. The existing Nova full aperture backscatter station has been useful in understanding laser plasma instabilities occurring in hohlraums by measuring the quantity, spectral distribution, and near-field spatial distributions of Brillouin and more recently Raman backscatter. Equally important is an understanding of the far-field spatial intensity distribution which could help in understanding filamentation, threshold and saturation processes. This article describes a broadband, color-corrected far-field imager and associated diagnostics capable of imaging the source of scattered light to better than 25 {mu}m resolution. Brillouin and Raman backscatter can be imaged through the Nova beam-7 focusing lens or the imager can be used like a microscope to image side scatter from other beams. {copyright} {ital 1997 American Institute of Physics.}

  20. Direct measurements of 22Na(p,g)23Mg resonances and consequences for 22Na production in classical novae

    E-Print Network [OSTI]

    A. L. Sallaska; C. Wrede; A. Garcia; D. W. Storm; T. A. D. Brown; C. Ruiz; K. A. Snover; D. F. Ottewell; L. Buchmann; C. Vockenhuber; D. A. Hutcheon; J. A. Caggiano

    2010-09-24

    The radionuclide 22Na is a potential astronomical observable that is expected to be produced in classical novae in quantities that depend on the thermonuclear rate of the 22Na(p,g)23Mg reaction. We have measured the strengths of low-energy 22Na(p,g)23Mg resonances directly and absolutely using a radioactive 22Na target. We find the strengths of resonances at E_p = 213, 288, 454, and 610 keV to be higher than previous measurements by factors of 2.4 to 3.2, and we exclude important contributions to the rate from proposed resonances at E_p = 198, 209, and 232 keV. The 22Na abundances expected in the ejecta of classical novae are reduced by a factor of ~ 2.

  1. On the 21Na(p,gamma)22Mg thermonuclear rate for 22Na production in novae

    E-Print Network [OSTI]

    Nadya A. Smirnova; Alain Coc

    2000-08-16

    Classical novae are potential sources of gamma-rays, like the 1.275 MeV gamma emission following 22Na beta decay, that could be detected by appropriate instruments on board of future satellites like INTEGRAL. It has been shown that the production of 22Na by novae is affected by the uncertainty on the 21Na(p,gamma)22Mg rate and in particular by the unknown partial widths of the Ex = 5.714 MeV, J^pi = 2^+, 22Mg level. To reduce these uncertainties, we performed shell model calculations with the OXBASH code, compared the results with available spectroscopic data and calculated the missing partial widths. Finally, we discuss the influence of these results on the 21Na(p,gamma)22Mg reaction rate and 22Na synthesis.

  2. XMM-Newton observations of the dwarf nova RU Peg in quiescence: Probe of the boundary layer

    E-Print Network [OSTI]

    Balman, S; Sion, E M; Ness, J -U; Schlegel, E; Barrett, P E; Szkody, P

    2011-01-01

    We present an analysis of X-ray and UV data obtained with the XMM-Newton Observatory of the long period dwarf nova RU Peg. RU Peg contains a massive white dwarf, possibly the hottest white dwarf in a dwarf nova, it has a low inclination, thus optimally exposing its X-ray emitting boundary layer, and has an excellent trigonometric parallax distance. We modeled the X-ray data using XSPEC assuming a multi-temperature plasma emission model built from the MEKAL code. We obtained a maximum temperature of 31.7 keV, based on the EPIC MOS1, 2 and pn data, indicating that RU Peg has an X-ray spectrum harder than most dwarf novae, except U Gem. This result is consistent with and indirectly confirms the large mass of the white dwarf in RU Peg. The X-ray luminosity we computed corresponds to a boundary layer luminosity for a mass accretion rate of 2.E-11 Msun/yr (assuming Mwd=1.3Msun), in agreement with an expected quiescent accretion rate. The modeling of the O VIII emission line at 19A as observed by the RGS implies a p...

  3. Dwarf Nova-like Outburst of Short Period Intermediate Polar HT Camelopardalis

    E-Print Network [OSTI]

    Ryoko Ishioka; Taichi Kato; Makoto Uemura; Gary W. Billings; Koichi Morikawa; Ken'ichi Torii; Kenji Tanabe; Arto Oksanen; Harri Hyvonen; Hitoshi Itoh

    2002-06-12

    We report the first time-series observations of the short outburst of the proposed intermediate polar HT Cam (=RX J0757.0+6306). On 2001 December 29, we detected the object was undergoing a bright outburst at the magnitude of $m_{vis}=12.2$. Following this detection, we started international joint observations through VSNET. The light curve showed a gradual decline for the first 0.5 d. Following this short plateau phase, the rate of decline dramatically increased to more than 4 mag d$^{-1}$. Within 1.5 d from the outburst detection, the object almost declined to the quiescent level. During the rapidly declining phase, long-term modulations with a period of 86 min and strong pulses with a period of 8.6 min were observed. We concluded that 86 min and 8.6 min are the orbital period and the spin period of HT Cam, respectively. By the detection of the spin period, we confirmed the IP classification of HT Cam. However, its outburst behavior rather resembles that of dwarf novae. The discrepancy between the declining rates of the total flux and the pulse flux strongly suggests that the disk instabilities were taking place during the outburst.

  4. THE SUPERSOFT X-RAY PHASE OF NOVA RS OPHIUCHI 2006

    SciTech Connect (OSTI)

    Osborne, J. P.; Page, K. L.; Beardmore, A. P.; Goad, M. R.; Bode, M. F.; O'Brien, T. J.; Starrfield, S.; Rauch, T.; Ness, J.-U.; Krautter, J.; Schwarz, G.; Burrows, D. N.; Gehrels, N.; Drake, J. J.; Evans, A.; Eyres, S. P. S.

    2011-02-01

    Swift X-ray observations of the {approx}60 day supersoft phase of the recurrent nova RS Ophiuchi (RS Oph) 2006 show the progress of nuclear burning on the white dwarf (WD) in exquisite detail. First seen 26 days after the optical outburst, this phase started with extreme variability likely due to variable absorption, although intrinsic WD variations are not excluded. About 32 days later, a steady decline in count rate set in. NLTE model atmosphere spectral fits during the supersoft phase show that the effective temperature of the WD increases from {approx}65 eV to {approx}90 eV during the extreme variability phase, falling slowly after about day 60 and more rapidly after day 80. The bolometric luminosity is seen to be approximately constant and close to Eddington from day 45 up to day 60, the subsequent decline possibly signaling the end of extensive nuclear burning. Before the decline, a multiply-periodic {approx}35 s modulation of the soft X-rays was present and may be the signature of a nuclear fusion driven instability. Our measurements are consistent with a WD mass near the Chandrasekhar limit; combined with a deduced accumulation of mass transferred from its binary companion, this leads us to suggest that RS Oph is a strong candidate for a future supernova explosion. The main uncertainty now is whether the WD is the CO type necessary for a Type Ia supernova. This may be confirmed by detailed abundance analyses of spectroscopic data from the outbursts.

  5. Spectroscopic Study of the Envelope of the Hybrid Nova V458 Vul and Surrounding Nebula

    E-Print Network [OSTI]

    Tarasova, T N

    2015-01-01

    Spectroscopic observations of the hybrid V458 Vul obtained between days 9 and 778 after the brightness maximum are analyzed. Short-period, daily profile variations of forbidden [FeVII] iron lines were detected in the nebular phase, as well as a long-period (about 60-day) cyclic variation that was correlated with the photometric and X-ray cycles. The abundances of helium, neon, and iron in the nova's envelope have been estimated. The helium, neon, and iron abundances exceed the solar values by factors of 4.4, 4.8, and 3.7. The envelope mass is 1.4$\\times$ 10$^{-5}$M$_{\\odot}$. The electron temperatures and number densities have been calculated for the Northwestern and Southeastern knots of the planetary nebula. The temperature derived for the Northwestern knot is Te = 10 000 K and the electron number density, n$_{e}$ = 600 cm $^{-3}$ for the Southeastern knot, Te = 13 000 K and n$_{e}$ = 750 cm$^{-3}$.

  6. X-ray Development of the Classical Nova V2672 Ophiuchi with Suzaku

    E-Print Network [OSTI]

    Takei, D; Drake, J J; Kitamoto, S

    2013-01-01

    We report the Suzaku detection of a rapid flare-like X-ray flux amplification early in the development of the classical nova V2672 Ophiuchi. Two target-of-opportunity ~25 ks X-ray observations were made 12 and 22 days after the outburst. The flux amplification was found in the latter half of day 12. Time-sliced spectra are characterized by a growing supersoft excess with edge-like structures and a relatively stable optically-thin thermal component with Ka emission lines from highly ionized Si. The observed spectral evolution is consistent with a model that has a time development of circumstellar absorption, for which we obtain the decline rate of ~10-40 % in a time scale of 0.2 d on day 12. Such a rapid drop of absorption and short-term flux variability on day 12 suggest inhomogeneous ejecta with dense blobs/holes in the line of sight. Then on day 22 the fluxes of both supersoft and thin-thermal plasma components become significantly fainter. Based on the serendipitous results we discuss the nature of this so...

  7. The Relationship Between X-ray Luminosity and Duty Cycle for Dwarf Novae and their Specific Frequency in the Inner Galaxy

    E-Print Network [OSTI]

    Britt, C T; Pretorius, M L; Hynes, R I; Jonker, P G; Torres, M A P; Knigge, C; Heinke, C O; Johnson, C B; Steeghs, D; Greiss, S; Nelemans, G

    2015-01-01

    We measure the duty cycles for an existing sample of well observed, nearby dwarf novae using data from AAVSO, and present a quantitative empirical relation between the duty cycle of dwarf novae outbursts and the X-ray luminosity of the system in quiescence. We have found that $\\log DC=0.63(\\pm0.21)\\times(\\log L_{X}({\\rm erg\\,s^{-1}})-31.3)-0.95(\\pm0.1)$, where DC stands for duty cycle. We note that there is intrinsic scatter in this relation greater than what is expected from purely statistical errors. Using the dwarf nova X-ray luminosity functions from \\citet{Pretorius12} and \\citet{Byckling10}, we compare this relation to the number of dwarf novae in the Galactic Bulge Survey which were identified through optical outbursts during an 8-day long monitoring campaign. We find a specific frequency of X-ray bright ($L_{X}>10^{31}\\,{\\rm erg\\,s^{-1}}$) Cataclysmic Variables undergoing Dwarf Novae outbursts in the direction of the Galactic Bulge of $6.6\\pm4.7\\times10^{-5}\\,M_{\\odot}^{-1}$. Such a specific frequency...

  8. The 2011 outburst of recurrent nova T Pyx: X-ray observations expose the white dwarf mass and ejection dynamics

    SciTech Connect (OSTI)

    Chomiuk, Laura [Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824 (United States); Nelson, Thomas [School of Physics and Astronomy, University of Minnesota, 115 Church Street SE, Minneapolis, MN 55455 (United States); Mukai, Koji [CRESST and X-ray Astrophysics Laboratory, NASA/GSFC, Greenbelt, MD 20771 (United States); Sokoloski, J. L.; Weston, Jennifer [Columbia Astrophysics Laboratory, Columbia University, New York, NY (United States); Rupen, Michael P.; Mioduszewski, Amy J.; Krauss, Miriam I. [National Radio Astronomy Observatory, P.O. Box O, Socorro, NM 87801 (United States); Page, Kim L.; Osborne, Julian P. [Department of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH (United Kingdom); Kuulkers, Erik [European Space Astronomy Centre (ESA/ESAC), Science Operations Department, E-28691 Villanueva de la Caada, Madrid (Spain); Roy, Nirupam, E-mail: chomiuk@pa.msu.edu [Max Planck Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn (Germany)

    2014-06-20

    The recurrent nova T Pyx underwent its sixth historical outburst in 2011, and became the subject of an intensive multi-wavelength observational campaign. We analyze data from the Swift and Suzaku satellites to produce a detailed X-ray light curve augmented by epochs of spectral information. X-ray observations yield mostly non-detections in the first four months of outburst, but both a super-soft and hard X-ray component rise rapidly after Day 115. The super-soft X-ray component, attributable to the photosphere of the nuclear-burning white dwarf, is relatively cool (?45 eV) and implies that the white dwarf in T Pyx is significantly below the Chandrasekhar mass (?1 M {sub ?}). The late turn-on time of the super-soft component yields a large nova ejecta mass (? 10{sup –5} M {sub ?}), consistent with estimates at other wavelengths. The hard X-ray component is well fit by a ?1 keV thermal plasma, and is attributed to shocks internal to the 2011 nova ejecta. The presence of a strong oxygen line in this thermal plasma on Day 194 requires a significantly super-solar abundance of oxygen and implies that the ejecta are polluted by white dwarf material. The X-ray light curve can be explained by a dual-phase ejection, with a significant delay between the first and second ejection phases, and the second ejection finally released two months after outburst. A delayed ejection is consistent with optical and radio observations of T Pyx, but the physical mechanism producing such a delay remains a mystery.

  9. Direct measurement of the 15N(p,gamma)16O total cross section at novae energies

    E-Print Network [OSTI]

    D Bemmerer; A Caciolli; R Bonetti; C Broggini; F Confortola; P Corvisiero; H Costantini; Z Elekes; A Formicola; Zs Fulop; G Gervino; A Guglielmetti; C Gustavino; Gy Gyurky; M Junker; B Limata; M Marta; R Menegazzo; P Prati; V Roca; C Rolfs; C Rossi Alvarez; E Somorjai; O Straniero

    2009-02-04

    The 15N(p,gamma)16O reaction controls the passage of nucleosynthetic material from the first to the second carbon-nitrogen-oxygen (CNO) cycle. A direct measurement of the total 15N(p,gamma)16O cross section at energies corresponding to hydrogen burning in novae is presented here. Data have been taken at 90-230 keV center-of-mass energy using a windowless gas target filled with nitrogen of natural isotopic composition and a bismuth germanate summing detector. The cross section is found to be a factor two lower than previously believed.

  10. Observational Accuracy of Variable Stars, Novae and Supernovae from Naked Eye to General Relativistic Standard: a Balance over Thousand SGQ Observations Sent to AAVSO

    E-Print Network [OSTI]

    Sigismondi, Costantino

    2015-01-01

    The theory of General Relativity deals with very accurate measurements that show significant divergences from Newtonian predictions only with speeds near to the velocity of light. An introduction for educational purposes, based on naked eye photometry, deals with the radiation near collapsing star's shells like novae and supernovae. The theme of accuracy is drafted from entry level observations to the precision of professional data, often of public domain on the web. Thousand observations of variable stars, included the type 1a SN2014J, the Nova Del 2013 and the Nova Cen 2013, sent to the AAVSO by the author, with SGQ code, during the period 1998-2015 are analyzed to increase the photometric accuracy, in the occasion of the International Year of Light 2015.

  11. New 34Cl proton-threshold states and the thermonuclear 33S(p,gamma)34Cl rate in ONe novae

    E-Print Network [OSTI]

    A. Parikh; T. Faestermann; R. Hertenberger; R. Kruecken; D. Schafstadler; H. -F. Wirth; T. Behrens; V. Bildstein; S. Bishop; K. Eppinger; C. Herlitzius; C. Hinke; M. Schlarb; D. Seiler; K. Wimmer

    2009-06-19

    Analysis of presolar grains in primitive meteorites has shown isotopic ratios largely characteristic of the conditions thought to prevail in various astrophysical environments. A possible indicator for a grain of ONe nova origin is a large 33S abundance: nucleosynthesis calculations predict as much as 150 times the solar abundance of 33S in the ejecta of nova explosions on massive ONe white dwarfs. This overproduction factor may, however, vary by factors of at least 0.01 - 3 because of uncertainties of several orders of magnitude in the 33S(p,gamma)34Cl reaction rate at nova peak temperatures (Tpeak ~ 0.1 - 0.4 GK). These uncertainties arise due to the lack of nuclear physics information for states within ~ 600 keV of the 33S+p threshold in 34Cl (Sp(34Cl) = 5143 keV). To better constrain this rate we have measured, for the first time, the 34S(3He,t)34Cl reaction over the region Ex(34Cl) = 4.9 - 6 MeV. We confirm previous states and find 15 new states in this energy region. New 33S(p,gamma)34Cl resonances at ER = 281(2), 301(2) and 342(2) keV may dominate this rate at relevant nova temperatures. Our results could affect predictions of sulphur isotopic ratios in nova ejecta (e.g., 32S/33S) that may be used as diagnostic tools for the nova paternity of grains.

  12. Full aperture backscatter station imager (FABSI) diagnostics system for far-field imaging of laser plasma instabilities on Nova

    SciTech Connect (OSTI)

    Wilke, M.D.; Fernandez, J.C.; Berggren, R.R.; Montgomery, D.; Faulkner, J.; Looney, L.; Jimerson, J.; Horton, R.F.

    1996-06-01

    In ICF, the understanding of laser plasma scattering processes is essential for laser target coupling and in controlling the symmetry of indirect drive implosions. The existing Nova Full Aperture Backscatter Station (FABS) has been useful in understanding laser plasma instabilities occurring in hohlraums by measuring the quantity, spectral distribution and near-field spatial distributions of Brillouin and more recently Raman backscatter. Equally important is an understanding of the farfield spatial intensity distribution which provides information on density, temperature and velocity gradient distributions, and which affect capsule implosion symmetry in hohlraums. Such information could potentially help in understanding processes such as filamentation and saturation mechanism. This paper describes a broad-band, color-corrected far-field imager and associated diagnostics capable of imaging the source of scattered light to better than 25 {micro}m resolution. The imager can either image Brillouin or Raman backscatter through the Nova beam 7 focusing lens or be used like a microscope to image side scatter from other beams.

  13. Quark-Novae in massive binaries : a model for double-humped, hydrogen-poor, superluminous Supernovae

    E-Print Network [OSTI]

    Ouyed, Rachid; Koning, Nico

    2015-01-01

    LSQ14bdq and SN 2006oz are super-luminous, hydrogen-poor, SNe with double-humped light curves. We show that a Quark-Nova (QN; explosive transition of the neutron star to a quark star) occurring in a massive binary, experiencing two Common Envelope (CE) phases, can quantitatively explain the light curves of LSQ14bdq and SN 2006oz. The more massive component (A) explodes first as a normal SN, yielding a Neutron Star which ejects the hydrogen envelope of the companion when the system enters its first CE phase. During the second CE phase, the NS spirals into and inflates the second He-rich CE. In the process it gains mass and triggers a Quark-Nova, outside of the CO core, leaving behind a Quark Star. The first hump in our model is the QN shock re-energizing the expanded He-rich CE. Subsequent merging of the Quark Star with the CO core of component B turns the Quark star to a Black Hole. The ensuing Black Hole accretion provides sufficient power for the second brighter and long lasting hump. Our model suggests a p...

  14. Insights into the evolution of symbiotic recurrent novae from radio synchrotron emission: V745 Scorpii and RS Ophiuchi

    E-Print Network [OSTI]

    Kantharia, N G; Roy, Nirupam; Anupama, G C; Ishwara-Chandra, C H; Chitale, A; Prabhu, T P; Banerjee, D P K; Ashok, N M

    2015-01-01

    We present observations at 610 MHz and 235 MHz using the Giant Metrewave Radio Telescope (GMRT) of the recurrent nova V745 Scorpii which recorded its last outburst on 6 February 2014. This is the second symbiotic recurrent nova whose light curve at GMRT frequencies has been followed in detail, the first being RS Ophiuchi in 2006. We fitted the 610 MHz light curve by a model of synchrotron emission from an expanding shell being modified by radiative transfer effects due to local absorbing gas consisting of a uniformly distributed and a clumpy component. Using our model parameters, we find that the emission at 235 MHz peaked around day 35 which is consistent with our GMRT observations. The two main results of our study are: (1) The radio emission at a given frequency is visible sooner after the outburst in successive outbursts of both V745 Scorpii and RS Ophiuchi. The earlier detection of radio emission is interpreted to be caused by decreasing foreground densities. (2) The clumpy material is located close to t...

  15. The October 1985 Long Outburst of U Geminorum: Revealing the Viscous Time Scale in Long Orbital Period Dwarf Novae

    E-Print Network [OSTI]

    John K. Cannizzo; Neil Gehrels; Janet A. Mattei

    2002-07-11

    We examine the AAVSO light curve of U Geminorum from 1908 to 2002, with particular focus on the October 1985 outburst. This outburst was longer than any other seen in U Gem by about a factor of 2, and appears to be unique among all dwarf nova outbursts seen in systems with orbital periods longer than 3 hr in that one can measure the decay time scale during the initial slow decay. This rate is ~26+-6 d/mag. Using estimates of the rate of accretion during outburst taken from Froning et al., one can show that ~1e24 g of gas was accreted onto the white dwarf during the outburst. When coupled with the viscous time inferred from the (short orbital period) SU UMa stars, the U Gem viscous time scale lends support to the standard model in which the decays in dwarf novae can either be viscous or thermal, with the ratio between them being roughly h/r where h is the vertical pressure scale height in the disk.

  16. A remarkable recurrent nova in M31: Discovery and optical/UV observations of the predicted 2014 eruption

    E-Print Network [OSTI]

    Darnley, M J; Steele, I A; Bode, M F; Ribeiro, V A R M; Rodríguez-Gil, P; Shafter, A W; Williams, S C; Baer, D; Hachisu, I; Hernanz, M; Hornoch, K; Hounsell, R; Kato, M; Kiyota, S; Ku?áková, H; Maehara, H; Ness, J -U; Piascik, A S; Sala, G; Skillen, I; Smith, R J; Wolf, M

    2015-01-01

    The Andromeda Galaxy recurrent nova M31N 2008-12a had been caught in eruption eight times. The inter-eruption period of M31N 2008-12a is ~1 year, making it the most rapidly recurring system known, and a strong single-degenerate Type Ia Supernova progenitor candidate. Following the 2013 eruption, a campaign was initiated to detect the predicted 2014 eruption and to then perform high cadence optical photometric and spectroscopic monitoring using ground-based telescopes, along with rapid UV and X-ray follow-up with the Swift satellite. Here we report the results of a high cadence multicolour optical monitoring campaign, the spectroscopic evolution, and the UV photometry. We also discuss tantalising evidence of a potentially related, vastly-extended, nebulosity. The 2014 eruption was discovered, before optical maximum, on October 2, 2014. We find that the optical properties of M31N 2008-12a evolve faster than all Galactic recurrent novae known, and all its eruptions show remarkable similarity both photometrically...

  17. Suzaku X-Ray Observation of the Dwarf Nova Z Camelopardalis at the Onset of an Optical Outburst

    E-Print Network [OSTI]

    Saitou, Kei; Ebisawa, Ken; Ishida, Manabu

    2012-01-01

    We present the result of a Suzaku X-ray spectroscopic observation of the dwarf nova Z Camelopardalis, which was conducted by chance at the onset of an optical outburst. We used the X-ray Imaging Spectrometer (a 38 ks exposure) and the Hard X-ray Detector (34 ks) to obtain a 0.35-40 keV spectrum simultaneously. Spectral characteristics suggest that the source was in the X-ray quiescent state despite being in the rising phase of an outburst in the optical band. The spectrum shows a clear signature of circumstellar absorption in excess of interstellar absorption and the reprocessed emission features of Fe fluorescence and Compton scattering. The extra absorption is explained due to partial coverage by either neutral or ionized matter. We found a spectral change during the observation, which is attributable only to the change in the circumstellar absorption. Such an X-ray spectral variation is reported for the first time in dwarf novae. We speculate that the variation in the circumstellar absorption is interprete...

  18. Discovery of $^{34g,m}$Cl$(p,\\gamma)^{35}$Ar resonances activated at classical nova temperatures

    E-Print Network [OSTI]

    Fry, C; Bishop, S; Brown, B A; Chen, A A; Faestermann, T; Hertenberger, R; Parikh, A; Pérez-Loureiro, D; Wirth, H -F; García, A; Ortez, R

    2015-01-01

    Background: The thermonuclear $^{34g,m}$Cl($p,\\gamma$)$^{35}$Ar reaction rates are unknown due to a lack of experimental nuclear physics data. Uncertainties in these rates translate to uncertainties in $^{34}$S production in models of classical novae on oxygen-neon white dwarfs. $^{34}$S abundances have the potential to aid in the classification of presolar grains. Purpose: Determine resonance energies for the $^{34g,m}$Cl($p,\\gamma$)$^{35}$Ar reactions within the region of astrophyical interest for classical novae to a precision of a few keV as an essential first step toward constraining their thermonuclear reaction rates. Method: $^{35}$Ar excited states were populated by the $^{36}$Ar($d,t$)$^{35}$Ar reaction at $E$(d)=22~MeV and reaction products were momentum analyzed by a high resolution quadrupole-dipole-dipole-dipole (Q3D) magnetic spectrograph. Results: Seventeen new $^{35}$Ar levels have been detected at a statistically significant level in the region $E_x\\approx$~5.9-6.7~MeV ($E_r$ \\textless~800~ k...

  19. A remarkable recurrent nova in M 31: The predicted 2014 outburst in X-rays with Swift

    E-Print Network [OSTI]

    Henze, M; Darnley, M J; Bode, M F; Williams, S C; Shafter, A W; Sala, G; Kato, M; Hachisu, I; Hernanz, M

    2015-01-01

    The M 31 nova M31N 2008-12a was recently found to be a recurrent nova (RN) with a recurrence time of about 1 year. This is by far the fastest recurrence time scale of any known RNe. Our optical monitoring programme detected the predicted 2014 outburst of M31N 2008-12a in early October. We immediately initiated an X-ray/UV monitoring campaign with Swift to study the multiwavelength evolution of the outburst. We monitored M31N 2008-12a with daily Swift observations for 20 days after discovery, covering the entire supersoft X-ray source (SSS) phase. We detected SSS emission around day six after outburst. The SSS state lasted for approximately two weeks until about day 19. M31N 2008-12a was a bright X-ray source with a high blackbody temperature. The X-ray properties of this outburst were very similar to the 2013 eruption. Combined X-ray spectra show a fast rise and decline of the effective blackbody temperature. The short-term X-ray light curve showed strong, aperiodic variability which decreased significantly a...

  20. Final Scientific/Technical Report to the U.S. Department of Energy on NOVA's Einstein's Big Idea (Project title: E-mc2, A Two-Hour Television Program on NOVA)

    SciTech Connect (OSTI)

    Susanne Simpson

    2007-05-07

    Executive Summary A woman in the early 1700s who became one of Europe’s leading interpreters of mathematics and a poor bookbinder who became one of the giants of nineteenth-century science are just two of the pioneers whose stories NOVA explored in Einstein’s Big Idea. This two-hour documentary premiered on PBS in October 2005 and is based on the best-selling book by David Bodanis, E=mc2: A Biography of the World’s Most Famous Equation. The film and book chronicle the scientific challenges and discoveries leading up to Einstein’s startling conclusion that mass and energy are one, related by the formula E = mc2.

  1. Not. Astron. doi:10.1111/j.13652966.2005.09664.x An Xray emissionline spectrum of Nova V382 Velorum 1999

    E-Print Network [OSTI]

    Ness, Jan-Uwe

    X­ray grating spectrum Classical Nova V382 (1999), obtained with Low Energy Transmission Grating), of cataclysmic variables (CVs), thought to be thermonuclear explosions induced on surface of white dwarfs of hydrogen­rich fuel causes thermonuclear runaway (TNR). tensive modelling of been carried past Starrfield

  2. Photometric study of southern SU UMa-type dwarf novae and candidates -- III: NSV 10934, MM Sco, AB Nor, CAL 86

    E-Print Network [OSTI]

    T. Kato; P. Nelson; C. Stockdale; B. Monard; T. Richards; R. Stubbings; H. Yamaoka; B. Heathcote; R. Santallo

    2003-10-01

    We photometrically observed four southern dwarf novae in outburst (NSV 10934, MM Sco, AB Nor and CAL 86). NSV 10934 was confirmed to be an SU UMa-type dwarf nova with a mean superhump period of 0.07478(1) d. This star also showed transient appearance of quasi-periodic oscillations (QPOs) during the final growing stage of the superhumps. Combined with the recent theoretical interpretation and with the rather unusual rapid terminal fading of normal outbursts, NSV 10934 may be a candidate intermediate polar showing SU UMa-type properties. The mean superhump periods of MM Sco and AB Nor were determined to be 0.06136(4) d and 0.08438(2) d, respectively. We suggest that AB Nor belongs to a rather rare class of long-period SU UMa-type dwarf novae with low mass-transfer rates. We also observed an outburst of the suspected SU UMa-type dwarf nova CAL 86. We identified this outburst as a normal outburst and determined the mean decline rate of 1.1 mag/d.

  3. FAR-ULTRAVIOLET SPECTROSCOPY OF THE NOVA-LIKE VARIABLE KQ MONOCEROTIS: A NEW SW SEXTANTIS STAR?

    SciTech Connect (OSTI)

    Wolfe, Aaron; Sion, Edward M.; Bond, Howard E. E-mail: edward.sion@villanova.edu

    2013-06-01

    New optical spectra obtained with the SMARTS 1.5 m telescope and archival International Ultraviolet Explorer (IUE) far-ultraviolet (FUV) spectra of the nova-like variable KQ Mon are discussed. The optical spectra reveal Balmer lines in absorption as well as He I absorption superposed on a blue continuum. The 2011 optical spectrum is similar to the KPNO 2.1 m IIDS spectrum we obtained 33 years earlier except that the Balmer and He I absorption is stronger in 2011. Far-ultraviolet IUE spectra reveal deep absorption lines due to C II, Si III, Si IV, C IV, and He II, but no P Cygni profiles indicative of wind outflow. We present the results of the first synthetic spectral analysis of the IUE archival spectra of KQ Mon with realistic optically thick, steady-state, viscous accretion-disk models with vertical structure and high-gravity photosphere models. We find that the photosphere of the white dwarf (WD) contributes very little FUV flux to the spectrum and is overwhelmed by the accretion light of a steady disk. Disk models corresponding to a WD mass of {approx}0.6 M {sub Sun }, with an accretion rate of order 10{sup -9} M {sub Sun} yr{sup -1} and disk inclinations between 60 Degree-Sign and 75 Degree-Sign , yield distances from the normalization in the range of 144-165 pc. KQ Mon is discussed with respect to other nova-like variables. Its spectroscopic similarity to the FUV spectra of three definite SW Sex stars suggests that it is likely a member of the SW Sex class and lends support to the possibility that the WD is magnetic.

  4. XMM-NEWTON X-RAY AND ULTRAVIOLET OBSERVATIONS OF THE FAST NOVA V2491 Cyg DURING THE SUPERSOFT SOURCE PHASE

    SciTech Connect (OSTI)

    Ness, J.-U. [XMM-Newton Science Operations Centre, ESA, Madrid (Spain); Osborne, J. P.; Page, K. L.; Beardmore, A. P. [Department of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH (United Kingdom); Dobrotka, A. [Department of Physics, Institute of Materials Science, Faculty of Materials Science and Technology, Slovak University of Technology in Bratislava, 91724 Trnava (Slovakia); Drake, J. J. [Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States); Pinto, C.; Detmers, R. G. [SRON Netherlands Institute for Space Research, 3584 CA Utrecht (Netherlands); Schwarz, G. [American Astronomical Society, Washington, DC 20009-1231 (United States); Bode, M. F. [Astrophysics Research Institute, Liverpool John Moores University, Birkenhead CH41 1LD (United Kingdom); Starrfield, S. [School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287-1404 (United States); Hernanz, M. [Institut de Ciencies de l'Espai (CSIC-IEEC), Campus UAB, Facultat de Ciencies, 08193 Bellaterra (Barcelona) (Spain); Sala, G. [Departament Fisica i Enginyeria Nuclear, EUETIB (UPC-IEEC), 08036 Barcelona (Spain); Krautter, J. [Landessternwarte Koenigstuhl, Universitaet Heidelberg, D-69117 Heidelberg (Germany); Woodward, C. E. [Department of Astronomy, University of Minnesota, Minneapolis, MN 55455 (United States)

    2011-05-20

    Two XMM-Newton observations of the fast classical nova V2491 Cyg were carried out in short succession on days 39.93 and 49.62 after discovery, during the supersoft source (SSS) phase, yielding simultaneous X-ray and UV light curves and high-resolution X-ray spectra. The first X-ray light curve is highly variable, showing oscillations with a period of 37.2 minutes after an extended factor of three decline lasting {approx}3 hr, while the second X-ray light curve is less variable. The cause of the dip is currently unexplained and has most likely the same origin as similar events in the early SSS light curves of the novae V4743 Sgr and RS Oph, as it occurred on the same timescale. The oscillations are not present during the dip minimum and also not in the second observation. The UV light curves are variable but contain no dips and no period. High-resolution X-ray spectra are presented for four intervals of differing intensity. All spectra are atmospheric continua with deep absorption lines and absorption edges. Two interstellar lines of O I and N I are clearly seen at their rest wavelengths, while a large number of high-ionization absorption lines are found at blueshifts indicating an expansion velocity of 3000-3400 km s{sup -1}, which does not change significantly during the epochs of observation. Comparisons with the slower nova V4743 Sgr and the symbiotic recurrent nova RS Oph are presented. The SSS spectrum of V4743 Sgr is much softer with broader and more complex photospheric absorption lines. The ejecta are extended, allowing us to view a larger range of the radial velocity profile. Meanwhile, the absorption lines in RS Oph are as narrow as in V2491 Cyg, but they are less blueshifted. A remarkable similarity in the continua of V2491 Cyg and RS Oph is found. The only differences are smaller line shifts and additional emission lines in RS Oph that are related to the presence of a dense stellar wind from the evolved companion. Three unidentified absorption lines are present in the X-ray spectra of all three novae, with projected rest wavelengths 26.05 A, 29.45 A, and 30.0 A. No entirely satisfactory spectral model is currently available for the soft X-ray spectra of novae in outburst, and careful discussion of assumptions is required.

  5. I was born in Halifax, N.S. in 1977, but grew up and went to

    E-Print Network [OSTI]

    Taylor, Peter

    and others. In the case of some commodities (options and positions on crude oil, natural gas, electricity. These risk factors are typically things like stock prices, interest rates, foreign exchange rates, cash flows

  6. I was born in Halifax, N.S. in 1977, but grew up and went to

    E-Print Network [OSTI]

    Argerami, Martin

    on crude oil, natural gas, electricity) you may be interested in the risk profile relative to population) to thousands of risk factors. These risk factors are typically things like stock prices, interest rates

  7. National Student Conference in Metallic Materials Halifax Hall, Endcliffe Village, University of Sheffield

    E-Print Network [OSTI]

    Cambridge, University of

    Reactions in Aluminium to Steel Ultrasonic Spot Welding Farid Haddadi The University of Manchester #12 University of Birmingham Residual stress mitigation in aerospace forgings through annealing heat treatment Session B2 ­ Steels, Ennis Room Chair ­ Ashwin Pandit, University of Cambridge Survey, classification

  8. XMM-NEWTON OBSERVATIONS OF THE DWARF NOVA RU Peg IN QUIESCENCE: PROBE OF THE BOUNDARY LAYER

    SciTech Connect (OSTI)

    Balman, Soelen [Department of Physics, Middle East Technical University, Ankara (Turkey); Godon, Patrick; Sion, Edward M. [Department of Astronomy and Astrophysics, Villanova University, Villanova, PA 19085 (United States); Ness, Jan-Uwe [XMM-Newton Science Operations Centre, European Space Agency (ESA/ESAC), E-28691 Villanueva de la Canada, Madrid (Spain); Schlegel, Eric [Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, TX 78249 (United States); Barrett, Paul E. [United States Naval Observatory, Washington, DC 20392 (United States); Szkody, Paula, E-mail: solen@astroa.physics.metu.edu.tr, E-mail: patrick.godon@villanova.edu, E-mail: edward.sion@villanova.edu, E-mail: juness@sciops.esa.int, E-mail: eric.schlegel@utsa.edu, E-mail: barrett.paul@usno.navy.mil, E-mail: szkody@astro.washington.edu [Astronomy Department, University of Seattle, Seattle, WA 98195 (United States)

    2011-11-10

    We present an analysis of X-ray and UV data obtained with the XMM-Newton Observatory of the long-period dwarf nova RU Peg. RU Peg contains a massive white dwarf (WD), possibly the hottest WD in a dwarf nova (DN), it has a low inclination, thus optimally exposing its X-ray emitting boundary layer (BL), and has an excellent trigonometric parallax distance. We modeled the X-ray data using XSPEC assuming a multi-temperature plasma emission model built from the MEKAL code (i.e., CEVMKL). We obtained a maximum temperature of 31.7 keV, based on the European Photon Imaging Camera MOS1, 2 and pn data, indicating that RU Peg has an X-ray spectrum harder than most DNe, except U Gem. This result is consistent with and indirectly confirms the large mass of the WD in RU Peg. The X-ray luminosity we computed corresponds to a BL luminosity for a mass accretion rate of 2 Multiplication-Sign 10{sup -11} M{sub sun} yr{sup -1} (assuming M{sub wd} = 1.3 M{sub sun}), in agreement with the expected quiescent accretion rate. The modeling of the O VIII emission line at 19 A as observed by the Reflection Grating Spectrometer implies a projected stellar rotational velocity v{sub rot}sin i = 695 km s{sup -1}, i.e., the line is emitted from material rotating at {approx}936-1245 km s{sup -1} (i {approx} 34 Degree-Sign -48 Degree-Sign) or about 1/6 of the Keplerian speed; this velocity is much larger than the rotation speed of the WD inferred from the Far Ultraviolet Spectroscopic Explorer spectrum. Cross-correletion analysis yielded an undelayed (time lag {approx} 0) component and a delayed component of 116 {+-} 17 s where the X-ray variations/fluctuations lagged the UV variations. This indicates that the UV fluctuations in the inner disk are propagated into the X-ray emitting region in about 116 s. The undelayed component may be related to irradiation effects.

  9. Classical-Nova Contribution to the Milky Way's $^{26}$Al Abundance: Exit Channel of the Key $^{25}$Al($p,?$)$^{26}$Si Resonance

    E-Print Network [OSTI]

    M. B. Bennett; C. Wrede; K. A. Chipps; J. José; S. N. Liddick; M. Santia; A. Bowe; A. A. Chen; N. Cooper; D. Irvine; E. McNeice; F. Montes; F. Naqvi; R. Ortez; S. D. Pain; J. Pereira; C. Prokop; J. Quaglia; S. J. Quinn; S. B. Schwartz; S. Shanab; A. Simon; A. Spyrou; E. Thiagalingam

    2013-12-12

    Classical novae are expected to contribute to the 1809-keV Galactic $\\gamma$-ray emission by producing its precursor $^{26}$Al, but the yield depends on the thermonuclear rate of the unmeasured $^{25}$Al($p,\\gamma$)$^{26}$Si reaction. Using the $\\beta$ decay of $^{26}$P to populate the key $J^{\\pi}=3^+$ resonance in this reaction, we report the first evidence for the observation of its exit channel via a $1741.6 \\pm 0.6 (\\textrm{stat}) \\pm 0.3 (\\textrm{syst})$ keV primary $\\gamma$ ray, where the uncertainties are statistical and systematic, respectively. By combining the measured $\\gamma$-ray energy and intensity with other experimental data on $^{26}$Si, we find the center-of-mass energy and strength of the resonance to be $E_r = 414.9 \\pm 0.6(\\textrm{stat}) \\pm 0.3 (\\textrm{syst}) \\pm 0.6(\\textrm{lit.})$ keV and $\\omega\\gamma = 23 \\pm 6 (\\textrm{stat})^{+11}_{-10}(\\textrm{lit.})$ meV, respectively, where the last uncertainties are from adopted literature data. We use hydrodynamic nova simulations to model $^{26}$Al production showing that these measurements effectively eliminate the dominant experimental nuclear-physics uncertainty and we estimate that novae may contribute up to 30% of the Galactic $^{26}$Al.

  10. Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. VII: The Seventh Year (2014-2015)

    E-Print Network [OSTI]

    Kato, Taichi; Dubovsky, Pavol A; Kudzej, Igor; Monard, Berto; Miller, Ian; Itoh, Hiroshi; Kiyota, Seiichiro; Masumoto, Kazunari; Fukushima, Daiki; Kinoshita, Hiroki; Maeda, Kazuki; Mikami, Jyunya; Matsuda, Risa; Kojiguchi, Naoto; Kawabata, Miho; Takenaka, Megumi; Matsumoto, Katsura; de Miguel, Enrique; Maeda, Yutaka; Ohshima, Tomohito; Isogai, Keisuke; Pickard, Roger D; Henden, Arne; Kafka, Stella; Akazawa, Hidehiko; Otani, Noritoshi; Ishibashi, Sakiko; Ogi, Minako; Tanabe, Kenji; Imamura, Kazuyoshi; Stein, William; Kasai, Kiyoshi; Vanmunster, Tonny; Starr, Peter; Pavlenko, Elena P; Antonyuk, Oksana I; Antonyuk, Kirill A; Sosnovskij, Aleksei A; Pit, Nikolaj V; Babina, Julia V; Sklyanov, Aleksandr; Novak, Rudolf; Oksanen, Arto; Dvorak, Shawn; Michel, Raul; Masi, Gianluca; Littlefield, Colin; Ulowetz, Joseph; Shugarov, Sergey Yu; Golysheva, Polina Yu; Chochol, Drahomir; Krushevska, Viktoriia; Ruiz, Javier; Tordai, Tamas; Morelle, Etienne; Sabo, Richard; Maehara, Hiroyuki; Richmond, Michael; Katysheva, Natalia; Hirosawa, Kenji; Goff, William N; Dubois, Franky; Logie, Ludwig; Rau, Steve; Voloshina, Irina B; Andreev, Maksim V; Shiokawa, Kazuhiko; Neustroev, Vitaly V; Sjoberg, George; Zharikov, Sergey; James, Nick; Bolt, Greg; Crawford, Tim; Buczynski, Denis; Cook, Lewis M; Kochanek, Christopher S; Shappee, Benjamin; Stanek, Krzysztof Z; Prieto, Jose L; Denisenko, Denis; Nishimura, Hideo; Mukai, Masaru; Kaneko, Shizuo; Ueda, Seiji; Stubbings, Rod; Moriyama, Masayuki; Schmeer, Patrick; Muyllaert, Eddy; Shears, Jeremy; Modic, Robert J; Paxson, Kevin B

    2015-01-01

    Continuing the project described by Kato et al. (2009, arXiv:0905.1757), we collected times of superhump maxima for 102 SU UMa-type dwarf novae observed mainly during the 2014-2015 season and characterized these objects. Our project has greatly improved the statistics of the distribution of orbital periods, which is a good approximation of the distribution of cataclysmic variables at the terminal evolutionary stage, and confirmed the presence of a period minimum at a period of 0.053 d and a period spike just above this period. The number density monotonically decreased toward the longer period and there was no strong indication of a period gap. We detected possible negative superhumps in Z Cha. It is possible that normal outbursts are also suppressed by the presence of a disk tilt in this system. There was no indication of enhanced orbital humps just preceding the superoutburst, and this result favors the thermal-tidal disk instability as the origin of superoutbursts. We detected superhumps in three AM CVn-ty...

  11. X-ray Eclipse Diagnosis of the Evolving Mass Loss in the Recurrent Nova U Scorpii 2010

    E-Print Network [OSTI]

    Takei, D; Tsujimoto, M; Ness, J -U; Osborne, J P; Starrfield, S; Kitamoto, S

    2013-01-01

    We report the Suzaku detection of the earliest X-ray eclipse seen in the recurrent nova U Scorpii 2010. A target-of-opportunity observation 15 days after the outburst found a 27+/-5% dimming in the 0.2-1.0 keV energy band at the predicted center of an eclipse. In comparison with the X-ray eclipse depths seen at two later epochs by XMM-Newton, the source region shrank by about 10-20% between days 15 and 35 after the outburst. The X-ray eclipses appear to be deeper than or similar to contemporaneous optical eclipses, suggesting the X-ray and optical source region extents are comparable on day 15. We raise the possibility of the energy dependency in the photon escape regions, and that this would be a result of the supersoft X-ray opacity being higher than the Thomson scattering optical opacity at the photosphere due to bound-free transitions in abundant metals that are not fully ionized. Assuming a spherically symmetric explosion model, we constrain the mass-loss rate as a function of time. For a ratio of actual...

  12. X-RAY ECLIPSE DIAGNOSIS OF THE EVOLVING MASS LOSS IN THE RECURRENT NOVA U SCORPII 2010

    SciTech Connect (OSTI)

    Takei, D.; Drake, J. J. [Smithsonian Astrophysical Observatory, 60 Garden Street, Cambridge, MA 02138 (United States); Tsujimoto, M. [Japan Aerospace Exploration Agency, Institute of Space and Astronautical Science, 3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210 (Japan); Ness, J.-U. [European Space Agency, XMM-Newton Observatory SOC, SRE-OAX, Apartado 78, E-28691 Villanueva de la Canada, Madrid (Spain); Osborne, J. P. [Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH (United Kingdom); Starrfield, S. [School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287-1404 (United States); Kitamoto, S., E-mail: dtakei@head.cfa.harvard.edu [Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima, Tokyo 171-8501 (Japan)

    2013-05-20

    We report the Suzaku detection of the earliest X-ray eclipse seen in the recurrent nova U Scorpii 2010. A target-of-opportunity observation 15 days after the outburst found a 27% {+-} 5% dimming in the 0.2-1.0 keV energy band at the predicted center of an eclipse. In comparison with the X-ray eclipse depths seen at two later epochs by XMM-Newton, the source region shrank by about 10%-20% between days 15 and 35 after the outburst. The X-ray eclipses appear to be deeper than or similar to contemporaneous optical eclipses, suggesting the X-ray and optical source region extents are comparable on day 15. We raise the possibility of the energy dependency in the photon escape regions, and that this would be a result of the supersoft X-ray opacity being higher than the Thomson scattering opacity at the photosphere due to bound-free transitions in abundant metals that are not fully ionized. Assuming a spherically symmetric model, we constrain the mass-loss rate as a function of time. For a ratio of actual to Thomson opacity of 10-100 in supersoft X-rays, we find an ejecta mass of about 10{sup -7}-10{sup -6} M{sub Sun }.

  13. Swift detection of the super-swift switch-on of the super-soft phase in nova V745 Sco (2014)

    E-Print Network [OSTI]

    Page, K L; Kuin, N P M; Henze, M; Walter, F M; Beardmore, A P; Bode, M F; Darnley, M J; Delgado, L; Drake, J J; Hernanz, M; Mukai, K; Nelson, T; Ness, J -U; Schwarz, G J; Shore, S N; Starrfield, S; Woodward, C E

    2015-01-01

    V745 Sco is a recurrent nova, with the most recent eruption occurring in February 2014. V745 Sco was first observed by Swift a mere 3.7 hr after the announcement of the optical discovery, with the super-soft X-ray emission being detected around four days later and lasting for only ~two days, making it both the fastest follow-up of a nova by Swift and the earliest switch-on of super-soft emission yet detected. Such an early switch-on time suggests a combination of a very high velocity outflow and low ejected mass and, together with the high effective temperature reached by the super-soft emission, a high mass white dwarf (>1.3 M_sun). The X-ray spectral evolution was followed from an early epoch where shocked emission was evident, through the entirety of the super-soft phase, showing evolving column density, emission lines, absorption edges and thermal continuum temperature. UV grism data were also obtained throughout the super-soft interval, with the spectra showing mainly emission lines from lower ionization...

  14. Extraordinary luminous soft X-ray transient MAXI J0158–744 as an ignition of a nova on a very massive O-Ne white dwarf

    SciTech Connect (OSTI)

    Morii, M.; Serino, M.; Mihara, T.; Sugizaki, M.; Tomida, H.; Kimura, M.; Nakahira, S.; Suwa, F.; Negoro, H.; Kennea, J. A.; Pritchard, T.; Page, K. L.; Osborne, J. P.; Curran, P. A.; Walter, F. M.; Kuin, N. P. M.; Hiroi, K.; Usui, R.; Kawai, N.; Gehrels, N.; and others

    2013-12-20

    We present the observation of an extraordinary luminous soft X-ray transient, MAXI J0158–744, by the Monitor of All-sky X-ray Image (MAXI) on 2011 November 11. This transient is characterized by a soft X-ray spectrum, a short duration (1.3 × 10{sup 3} s < ?T{sub d} < 1.10 × 10{sup 4} s), a rapid rise (<5.5 × 10{sup 3} s), and a huge peak luminosity of 2 × 10{sup 40} erg s{sup –1} in 0.7-7.0 keV band. With Swift observations and optical spectroscopy from the Small and Moderate Aperture Research Telescope System, we confirmed that the transient is a nova explosion, on a white dwarf in a binary with a Be star, located near the Small Magellanic Cloud. An early turn-on of the super-soft X-ray source (SSS) phase (<0.44 days), the short SSS phase duration of about one month, and a 0.92 keV neon emission line found in the third MAXI scan, 1296 s after the first detection, suggest that the explosion involves a small amount of ejecta and is produced on an unusually massive O-Ne white dwarf close to, or possibly over, the Chandrasekhar limit. We propose that the huge luminosity detected with MAXI was due to the fireball phase, a direct manifestation of the ignition of the thermonuclear runaway process in a nova explosion.

  15. Biogeography of Marine Algae

    E-Print Network [OSTI]

    Biogeography of Marine Algae David J Garbary, St Francis Xavier University, Antigonish, Nova Scotia and vicariance in establishing distributions and as factors associated with speciation. Since eukaryotic algae. There are many species that are virtually cosmopolitan (e.g. the green alga Enteromorpha intestinalis, the red

  16. North American Journal of Fisheries Management 22:770784, 2002 Copyright by the American Fisheries Society 2002

    E-Print Network [OSTI]

    Myers, Ransom A.

    Hydroelectric Generating Station, Nova Scotia A. JAMIE F. GIBSON* Acadia Centre for Estuarine Research, Post structures such as the intake pipes at cooling water plants or the turbine intakes at hydroelectric abundance, behavior, and rates of passage at hydroelectric stations vary considerably in re- sponse

  17. J. Paleont., 83(1), 2009, pp. 140146 Copyright 2009, The Paleontological Society

    E-Print Network [OSTI]

    Martino, Ronald L.

    from Ohio, Pennsylvania, Illinois, and Nova Scotia. Only four Arthropleura trackway sites have been.The track- ways were found in the lower Conemaugh Formation of Ken- tucky, equivalent to the Glenshaw Formation of the Conemaugh Group in neighboring West Virginia. The Glenshaw Formation consists predominantly

  18. A Computationally Stable Approach to Gaussian Process Interpolation of Deterministic

    E-Print Network [OSTI]

    Ranjan, Pritam

    extractable tidal power as a function of the turbine locations in the Bay of Fundy, Nova Scotia, Canada. The deter- ministic computer simulator for the tidal power model is a nu- merical solver of a complex system of partial differential equa- tions, and we accept the simulator as a valid representation of the tidal power

  19. Interannual Changes in Seasonal Ground Freezing and Near-surface Heat Flow Beneath Bottom-fast Ice in the Near-shore Zone, Mackenzie Delta, NWT, Canada

    E-Print Network [OSTI]

    Moorman, Brian

    Interannual Changes in Seasonal Ground Freezing and Near-surface Heat Flow Beneath Bottom-fast Ice Resources Canada, Dartmouth, Nova Scotia, Canada ABSTRACT Interannual changes in seasonal ground freezing. KEY WORDS: seasonal ground freezing; permafrost; bottom-fast ice; Mackenzie Delta INTRODUCTION Arctic

  20. Some electric myths Larry Hughes

    E-Print Network [OSTI]

    Hughes, Larry

    industrial demand (460 GWh), there has also been a significant increase in residential electricity demand in residential electricity demand is the result of the increased use of electricity for space heating since and Nova Scotia's demand for electricity, both of which are based, in part, upon the arguments made when

  1. Meeting NSPI's 2010 SO2 emission reduction cap Larry Hughes, Mandeep Dhaliwal, and Nikita Sheth

    E-Print Network [OSTI]

    Hughes, Larry

    is the principal fuel used by NSPI (see Table 2). Table 2: NSPI's generation by fuel type (MWh) (Toner, 2006) Coal of the highest in the country is Nova Scotia Power's reliance on coal for electrical generation. Given NSPI into the industrial and utility sector, and the continued use of low-sulphur coal. With the Sable Offshore Energy

  2. Migration cues and timing in leatherback sea turtles

    E-Print Network [OSTI]

    Myers, Ransom A.

    Migration cues and timing in leatherback sea turtles Scott A. Sherrill-Mix, Michael C. James, Nova Scotia, Canada B3H 4J1 Atlantic leatherback sea turtles migrate annually from foraging grounds off's proportional hazards model, we investigated the individual timing of the southward migrations of 27 turtles

  3. JSS Journal of Statistical Software March 2015, Volume 64, Issue 12. http://www.jstatsoft.org/

    E-Print Network [OSTI]

    Ranjan, Pritam

    .e., for emulating the tidal kinetic energy model for the Bay of Fundy, Nova Scotia, Canada. GPfit is free software and distributed under the General Public License and available from the Comprehensive R Archive Network. Keywords), dynamics of dark energy and dark matter in cosmological studies (Arbey 2006), and the tidal kinetic energy

  4. This article was downloaded by: [Universita Studi la Sapienza] On: 22 May 2015, At: 07:37

    E-Print Network [OSTI]

    Sciortino, Francesco

    : Taylor & Francis Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office for authors and subscription information: http://www.tandfonline.com/loi/tmph20 Phase diagram of the ST2 model of Physics, St. Francis Xavier University, Nova Scotia, Canada c Dipartimento di Fisica, Università di Roma

  5. Early Jurassic eolian dune field, Pomperaug basin, Connecticut and related synrift deposits

    E-Print Network [OSTI]

    LeTourneau, Peter M.

    Early Jurassic eolian dune field, Pomperaug basin, Connecticut and related synrift deposits eolian sandstone in the Pomperaug basin, Connecticut is noteworthy because it is the most significant from the Hartford (Connecticut, USA), Fundy (Nova Scotia, Canada), and Argana (Morocco) basins. Using

  6. E-Voting in Brazil -The Risks to Democracy Jos Rodrigues-Filho, Cynthia J. Alexander, and Luciano C. Batista

    E-Print Network [OSTI]

    Matwin, Stan

    - 85 - E-Voting in Brazil - The Risks to Democracy José Rodrigues-Filho, Cynthia J. Alexander, and Luciano C. Batista Federal University of Paraiba, Paraiba, Brazil and Acadia University, Nova Scotia be implemented - then the implications for democracy should be considered. Brazil's introduction of e

  7. Optimization of duplex real-time PCR with melting-curve analysis for detecting the microsporidian

    E-Print Network [OSTI]

    Shutler, Dave

    and 18 pooled samples of 15 workers) collected in Nova Scotia, Prince Edward Island, and Newfoundland´chantillons collectifs de 15 ouvrie`res) re´colte´s en Nouvelle-E´ cosse, a` l'I^le-du-Prince-E´ douard Received 13

  8. DALHOUSIE UNIVERSITY LIBRARIES Collections Strategy Librarian

    E-Print Network [OSTI]

    Brownstone, Rob

    for acquiring, preserving and sharing knowledge. As academic resources become format-agnostic and increasingly, Science, Management, and Computer Science), the W.K. Kellogg Health Sciences Library (Medicine, Dentistry of Nova Scotia academic libraries sharing a common library management system (Ex Libris Aleph 500

  9. Light Curves of Core-Collapse Supernovae with Substantial Mass Loss using the New Open-Source SuperNova Explosion Code (SNEC)

    E-Print Network [OSTI]

    Morozova, V; Renzo, M; Ott, C D; Clausen, D; Couch, S M; Ellis, J; Roberts, L F

    2015-01-01

    We present the SuperNova Explosion Code SNEC, an open-source Lagrangian code for the hydrodynamics and equilibrium-diffusion radiation transport in the expanding envelopes of supernovae. Given a model of a progenitor star, an explosion energy, and an amount and distribution of radioactive nickel, SNEC generates the bolometric light curve, as well as the light curves in different wavelength bands assuming black body emission. As a first application of SNEC, we consider the explosions of a grid of 15 Msun (at zero-age main sequence) stars whose hydrogen envelopes are stripped to different extents and at different points in their evolution. The resulting light curves exhibit plateaus with durations of ~20-100 days if >~1.5-2 Msun of hydrogen-rich material is left and no plateau if less hydrogen-rich material is left. The shorter plateau lengths are unlike the Type IIP supernova light curves typically observed in nature. This suggests that, at least for zero-age main sequence masses <~ 20 Msun, hydrogen mass l...

  10. Multi-wavelength Light Curve Model of the One-year Recurrence Period Nova M31N 2008-12a

    E-Print Network [OSTI]

    Kato, Mariko; Hachisu, Izumi

    2015-01-01

    We present a theoretical light curve model of the recurrent nova M31N 2008-12a, the current record holder for the shortest recurrence period (1 yr). We combined interior structures calculated using a Henyey-type evolution code with optically thick wind solutions of hydrogen-rich envelopes, which give the proper mass-loss rates, photospheric temperatures, and luminosities. The light curve model is calculated for a 1.38 M_sun white dwarf (WD) with an accretion rate of 1.6 \\times 10^{-7} M_sun yr^{-1}. This model shows a very high effective temperature (log T_ph (K) \\geq 4.97) and a very small wind mass-loss rate (\\dot M_wind \\leq 9.3 \\times 10^{-6} M_sun yr^{-1}) even at the maximum expansion of the photosphere. These properties are consistent with the faint optical peak of M31N 2008-12a because the brightness of the free-free emission is proportional to the square of the mass-loss rate. The model well reproduces the short supersoft X-ray turn-on time of 6 days and turnoff time of 18 days after the outburst. Th...

  11. QUARK-NOVAE IN LOW-MASS X-RAY BINARIES. II. APPLICATION TO G87-7 AND TO GRB 110328A

    SciTech Connect (OSTI)

    Ouyed, Rachid; Staff, Jan; Jaikumar, Prashanth

    2011-12-20

    We propose a simple model explaining two outstanding astrophysical problems related to compact objects: (1) that of stars such as G87-7 (alias EG 50) that constitute a class of relatively low-mass white dwarfs (WDs) which nevertheless fall away from the C/O composition and (2) that of GRB 110328A/Swift J164449.3+57345 which showed spectacularly long-lived strong X-ray flaring, posing a challenge to standard gamma-ray burst models. We argue that both these observations may have an explanation within the unified framework of a quark-nova (QN) occurring in a low-mass X-ray binary (LMXB; neutron star (NS)-WD). For LMXBs, where the binary separation is sufficiently tight, ejecta from the exploding NS triggers nuclear burning in the WD on impact, possibly leading to Fe-rich composition compact WDs with mass 0.43 M{sub Sun} < M{sub WD} < 0.72 M{sub Sun }, reminiscent of G87-7. Our results rely on the assumption, which ultimately needs to be tested by hydrodynamic and nucleosynthesis simulations, that under certain circumstances the WD can avoid the thermonuclear runaway. For heavier WDs (i.e., M{sub WD} > 0.72 M{sub Sun }) experiencing the QN shock, degeneracy will not be lifted when carbon burning begins, and a sub-Chandrasekhar Type Ia supernova may result in our model. Under slightly different conditions and for pure He WDs (i.e., M{sub WD} < 0.43 M{sub Sun }), the WD is ablated and its ashes raining down on the quark star (QS) leads to accretion-driven X-ray luminosity with energetics and duration reminiscent of GRB 110328A. We predict additional flaring activity toward the end of the accretion phase if the QS turns into a black hole.

  12. A self-consistent MoD-WM/MM structural refinement method: characterization of hydrogen bonding in the orytricha nova G-1uar

    SciTech Connect (OSTI)

    Batista, Enrique R [Los Alamos National Laboratory; Newcomer, Micharel B [YALE UNIV; Raggin, Christina M [YALE UNIV; Gascon, Jose A [YALE UNIV; Loria, J Patrick [YALE UNIV; Batista, Victor S [YALE UNIV

    2008-01-01

    This paper generalizes the MoD-QM/MM hybrid method, developed for ab initio computations of protein electrostatic potentials [Gasc6n, l.A.; Leung, S.S.F.; Batista, E.R.; Batista, V.S. J. Chem. Theory Comput. 2006,2, 175-186], as a practical algorithm for structural refinement of extended systems. The computational protocol involves a space-domain decomposition scheme for the formal fragmentation of extended systems into smaller, partially overlapping, molecular domains and the iterative self-consistent energy minimization of the constituent domains by relaxation of their geometry and electronic structure. The method accounts for mutual polarization of the molecular domains, modeled as Quantum-Mechanical (QM) layers embedded in the otherwise classical Molecular-Mechanics (MM) environment according to QM/MM hybrid methods. The method is applied to the description of benchmark models systems that allow for direct comparisons with full QM calculations, and subsequently applied to the structural characterization of the DNA Oxytricha nova Guanine quadruplex (G4). The resulting MoD-QM/MM structural model of the DNA G4 is compared to recently reported highresolution X-ray diffraction and NMR models, and partially validated by direct comparisons between {sup 1}H NMR chemical shifts that are highly sensitive to hydrogen-bonding and stacking interactions and the corresponding theoretical values obtained at the density functional theory DFT QM/MM (BH&H/6-31 G*:Amber) level in conjunction with the gauge independent atomic orbital (GIAO) method for the ab initio self consistent-field (SCF) calculation of NMR chemical shifts.

  13. Nova Biosource Fuels formerly Nova Energy Holding Inc | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc Jump to:Newberg, Oregon: EnergyNongqishiCleanAlinca Agricola e

  14. Nova Era | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc Jump to:Newberg, Oregon: EnergyNongqishiCleanAlinca Agricola eChemicalsEra

  15. Nova Produtiva | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc Jump to:Newberg, Oregon: EnergyNongqishiCleanAlinca Agricola

  16. THE 2011 ERUPTION OF THE RECURRENT NOVA T PYXIDIS: THE DISCOVERY, THE PRE-ERUPTION RISE, THE PRE-ERUPTION ORBITAL PERIOD, AND THE REASON FOR THE LONG DELAY

    SciTech Connect (OSTI)

    Schaefer, Bradley E.; Landolt, Arlo U. [Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803 (United States); Linnolt, Michael [American Association of Variable Star Observers, 49 Bay State Road, Cambridge, MA 02138 (United States); Stubbings, Rod [Tetoora Observatory, Tetoora Road, Victoria (Australia); Pojmanski, Grzegorz [Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa (Poland); Plummer, Alan [Variable Stars South, Linden Observatory, 105 Glossop Road, Linden, NSW (Australia); Kerr, Stephen [American Association of Variable Star Observers, Variable Stars South, Astronomical Association of Queensland, 22 Green Avenue, Glenlee, Queensland (Australia); Nelson, Peter [Ellinbank Observatory, 1105 Hazeldean Road, Ellinbank 3821, Victoria (Australia); Carstens, Rolf [American Association of Variable Star Observers, Variable Stars South, CBA, Geyserland Observatory, 120 Homedale Street, Rotorua 3015 (New Zealand); Streamer, Margaret [Lexy's Palace Observatory, 3 Lupin Place, Murrumbateman, NSW (Australia); Richards, Tom [Variable Stars South, Pretty Hill Observatory, P.O. Box 323, Kangaroo Ground 3097, Victoria (Australia); Myers, Gordon [Center for Backyard Astrophysics, Columbia University, 538 West 120th Street, New York, NY 10027 (United States); Dillon, William G. [American Association of Variable Star Observers, 4703 Birkenhead Circle, Missouri City, TX 77459 (United States)

    2013-08-10

    We report the discovery by M. Linnolt on JD 2,455,665.7931 (UT 2011 April 14.29) of the sixth eruption of the recurrent nova T Pyxidis. This discovery was made just as the initial fast rise was starting, so with fast notification and response by observers worldwide, the entire initial rise was covered (the first for any nova), and with high time resolution in three filters. The speed of the rise peaked at 9 mag day{sup -1}, while the light curve is well fit over only the first two days by a model with a uniformly expanding sphere. We also report the discovery by R. Stubbings of a pre-eruption rise starting 18 days before the eruption, peaking 1.1 mag brighter than its long-time average, and then fading back toward quiescence 4 days before the eruption. This unique and mysterious behavior is only the fourth known (with V1500 Cyg, V533 Her, and T CrB) anticipatory rise closely spaced before a nova eruption. We present 19 timings of photometric minima from 1986 to 2011 February, where the orbital period is fast increasing with P/ P-dot =+313,000 yr. From 2008 to 2011, T Pyx had a small change in this rate of increase, so that the orbital period at the time of eruption was 0.07622950 {+-} 0.00000008 days. This strong and steady increase of the orbital period can only come from mass transfer, for which we calculate a rate of (1.7-3.5) Multiplication-Sign 10{sup -7} M{sub Sun} yr{sup -1}. We report 6116 magnitudes between 1890 and 2011, for an average B = 15.59 {+-} 0.01 from 1967 to 2011, which allows for an eruption in 2011 if the blue flux is nearly proportional to the accretion rate. The ultraviolet-optical-infrared spectral energy distribution is well fit by a power law with f{sub {nu}}{proportional_to}{nu}{sup 1.0}, although the narrow ultraviolet region has a tilt with a fit of f{sub {nu}}{proportional_to}{nu}{sup 1/3}. We prove that most of the T Pyx light is not coming from a disk, or any superposition of blackbodies, but rather is coming from some nonthermal source. We confirm the extinction measure from IUE with E(B - V) = 0.25 {+-} 0.02 mag.

  17. Application to Export Electric Energy OE Docket No. EA-355 Scotia Capital

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher i n c i p a l De p u tCorporation |Inc.: Federal Register Notice,L.L.C.

  18. Large Engineering Systems Conference on Power Engineering, July 2004, Halifax Canada. IEEE 2004 1 Abstract--One important assumption in a model of an

    E-Print Network [OSTI]

    the impacts of bid format and profit calculation on market outcomes in different scenarios. Index Terms-- Power system economics, Pricing, Market design I. INTRODUCTION ne of the first assumptions in a model Abstract--One important assumption in a model of an electricity market is the format of bids and costs

  19. Differences in the fast optical variability of the dwarf nova V1504 Cyg between quiescence and outbursts detected in Kepler data and simulations of the rms-flux relations

    E-Print Network [OSTI]

    Dobrotka, A

    2015-01-01

    An optical light curve of SU UMa type dwarf nova V1504 Cyg taken by Kepler was analysed in order to study fast optical variability (flickering). We calculated power density spectra and rms-flux relations for two different stages of activity, i.e. quiescence and regular outbursts. A multicomponent power density spectrum with two break frequencies was found during both activity stages. The rms-flux relation is obvious only in the quiescent data. However, while the collection of all outburst data do not show this variability, every individual outburst does show it in the majority of cases keeping the rms value approximately in the same interval. Furthermore, the same analysis was performed for light curve subsamples taken from the beginning, middle and the end of the supercycle both for quiescence and regular outbursts. Every light curve subsample shows the same multicomponent power density spectrum. The stability of the break frequencies over the supercycle can be confirmed for all frequencies except for the hi...

  20. Recent developments: Industry briefs

    SciTech Connect (OSTI)

    1990-04-01

    Recent nuclear industry briefs are presented. These briefs include: Soviet Union to build Iran nuclear plant; Dension announces cuts in Elliot Lake production; Soviet environmental study delays Rostov startup; Cogema closes two mines; Namibian sanctions lifted by USA and Canada; US Energy and Kennecott restructors joint venture; Australians reelect Hawke; China to buy Soviet nuclear plant; Olympic Dam`s first sale of concentrates to USA; Uranevz buys one-third of Cogema`s Rabbit Lake operations; East and West Germany forming joint nuclear law; and Nova Scotia extends uranium exploration plan.

  1. NOVAS REGRAS CONSTRUO REABILITAO URBANAAMEAASEGURANA DOS MORADORES

    E-Print Network [OSTI]

    Instituto de Sistemas e Robotica

    acu- sam o Ministério do Ambiente, Ordenamento do Território e Energia (MAOTE) de ter ignora- do o Ambiente de não definir normas claras para o reforço estrutural dos edifícios com mais de 30 anos Os

  2. A NOVA ECONOMIA: NANOTECNOLOGIA Paulo J. Ferreira*

    E-Print Network [OSTI]

    Ferreira, Paulo J.

    aspectos de vida humana, tais como a saúde, o ambiente, a energia, os transportes, a tecnologia de europeus, EUA e Japão. A Alemanha, por exemplo, estabeleceu 6 centros de nanotecnologia que ligam empresas e universidades em 6 areas distintas. Um dos centros engloba 20 empresas, 10 universidades e 15

  3. BIOMETRIA E CINCIA NOVA GERAO DE TCNICAS

    E-Print Network [OSTI]

    Soares, João Luís Cardoso

    2006 A Revista da Ciência, Tecnologia e Inovação em Portugal #12;2e-ciência A Revista da Ciência, Tecnologia e Inovação em Portugal 02 Novembro 2006 #12;3 e-ciência A Revista da Ciência, Tecnologia e Paulo Carrasqueira Vera Gaspar ¬ MODELO GRÁFICO Paulo Simão ¬ PROPRIETÁRIO T MEDIA - Tecnologias de

  4. NovaTorque Inc | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsourceII Jump to:Information 3rd|Northfork Electric Coop, IncUSA(TXR150000)

  5. Impacts of Early Homestead Abandonment on Forests and Soils at Scotia Barrens, Central Pennsylvania: Implications for Altered

    E-Print Network [OSTI]

    Abrams, Marc David

    ). It was extensively used for the early mining of iron ore and charcoal production as a fuel source in local furnaces

  6. Facilitating communities in designing and using their own community health impact assessment tool

    SciTech Connect (OSTI)

    Cameron, Colleen; Ghosh, Sebanti; Eaton, Susan L.

    2011-07-15

    Reducing health inequities and improving the health of communities require an informed public that is aware of the social determinants of health and how policies and programs have an impact on the health of their communities. People Assessing Their Health (PATH) is a process that uses community-driven health impact assessment to build the capacity of people to become active participants in the decisions that affect the well-being of their community. The PATH process is both a health promotion and a community development approach that builds people's ability to bring critical analysis to a situation and to engage in effective social action to bring about desired change. Because it increases analytical skills and provides communities with their own unique tool to assess the potential impact of projects, programs or policies on the health and well-being of their community it is an empowering process. PATH was originally used in three communities in northeastern Nova Scotia, Canada in 1996 when the Canadian health care system was being restructured to a more decentralized system. Since then it has been used in other communities in Nova Scotia and India. This paper will describe the PATH process and the use of the community health impact assessment as well as the methodology used in the PATH process. The lessons learned from PATH's experiences of building capacity among the community in Canada and India will be presented.

  7. AT Cnc: A SECOND DWARF NOVA WITH A CLASSICAL NOVA SHELL (Journal Article) |

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield MunicipalTechnicalInformation4563 LLNL(TechnicalentanglementsScience andSciTech Connect AT Cnc:

  8. SCOR WG meeting November 2000 Innovative platform & deployment approaches

    E-Print Network [OSTI]

    Griffiths, Gwyn

    SCOR WG meeting November 2000 Innovative platform & deployment approaches: Challenges, potential 14 Sub Scotia Öbiomass(tonnes) missions 193-195 mission 196 AUV & Scotia biomass comparison

  9. Title: Landsat 7 Level 1-G Imageries over Canada Data Creator /

    E-Print Network [OSTI]

    Scotia, Nunavut, Ontario, Prince Edward Island, Quebec, Saskatchewan, Yukon Hudson Bay, Great Bear Lake

  10. Overview of the SuperNova/Acceleration probe (SNAP)

    E-Print Network [OSTI]

    2002-01-01

    from 42 High-Redshift Supernovae,” Astrophys J. 517, pp.Observational Evidence from Supernovae for an AcceleratingEnergy with Type Ia Supernovae and Large-Scale Structure,”

  11. Scanning Electron Microscope (FEI Nova NanoSEM 2300)

    E-Print Network [OSTI]

    Subramanian, Venkat

    screw. 4. Close the chamber door and select Pump. Always wear gloves when loading samples minute to vent, click Pump and notify Instrument Manager. 3. Insert sample stub and tighten using locking-tighten the locking screw, finger tight is adequate. #12;Start-up Procedure ­ Pump chamber with sample 1. Wait

  12. Scanning Electron Microscope (FEI Nova NanoSEM 2300)

    E-Print Network [OSTI]

    Subramanian, Venkat

    submenu. If chamber takes longer than 1 minute to vent, click Pump and notify Instrument Manager. 3. Insert sample stub and tighten using locking screw. 4. Close the chamber door and select Pump. Always wear gloves when loading samples into the chamber. Load sample while nitrogen purge is active to avoid

  13. Produtividade dos cientistas provoca nova polmica As declaraes

    E-Print Network [OSTI]

    Instituto de Sistemas e Robotica

    bolsas". No entanto, "quan- do medimos o número de paten- tes registadas e de artigos cientí- ficos Governo tem de ga- rantir que as bolsas para finan- ciar os doutoramentos, os pós- -doutoramentos e traga valor para pa- ra a economia". Na quarta-feira reuniu-se o Conselho dos 26 Laboratórios Associados

  14. Winter 2010 Volume XXV, Number 1 Nova Southeastern University

    E-Print Network [OSTI]

    of a $123-million American Recovery and Reinvestment Act grant program to support the construction of new-Schultz "who worked hard to help secure this funding and we owe them a debt of gratitude" Dodge said compelling new evidence of widespread mounting threats to coral reefs in U.S. waters, the delegation united

  15. Nova Publishers Smart Grid: Technologies, Applications and Management Systems

    E-Print Network [OSTI]

    Pedram, Massoud

    Model Based Control Algorithm for Residential Photovoltaic and Energy Storage Systems Accounting residential photovoltaic (PV) power generation and energy storage systems into the Smart Grid is an effective user; photovoltaic system; energy storage; adaptive control; component model; prediction error. 1

  16. Fermilab | Newsroom | Press Releases | February 11, 2014: NOvA...

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

    of the two particle detectors, one near the source at Fermilab and the other in Ash River, Minn., near the Canadian border. The detector in Ash River is operated by the...

  17. NOVA NERSC's Online VASP Application Annette Greiner Shreyas Cholia

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shines light on771/6/14 Contact: JanetSite661. NOIlVdlSINIWG VSPECIFIED

  18. NOVA Portal: Submit VASP Jobs to Carver via the Web

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shines light on771/6/14 Contact: JanetSite661. NOIlVdlSINIWG VSPECIFIEDNOVA

  19. Petra Nova - W.A. Parish Project | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy AEnergyPresidential PermitDAYS - WE NEED ADr. Peter B. Lyons - AssistantPeterThe

  20. Nova Alinca Agricola e Comercial | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc Jump to:Newberg, Oregon: EnergyNongqishiCleanAlinca Agricola e Comercial Jump

  1. Nova Bio Fuels Pvt Ltd | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc Jump to:Newberg, Oregon: EnergyNongqishiCleanAlinca Agricola e Comercial

  2. Nova Chemicals Reliance Industries JV | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc Jump to:Newberg, Oregon: EnergyNongqishiCleanAlinca Agricola eChemicals

  3. Geradora de Energia Nova Fatima | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EA Jump to:ofEniaElectric Jump to:Ger te und Akkumulatorwerk

  4. Vis Nova Trading GmbH | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop IncIowa (Utility Company)Idaho) JumpWinside, NebraskaVirginiaVirtual HydropowerVis

  5. Sandia Energy - Mark Boslough Featured in NOVA Special about the

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust, High-Throughput Analysis ofSampleLignin-Feasting Microbe HoldsMapping WaterChelyabinsk

  6. Silurian K-bentonites in North America and northwestern Europe: A trans-Atlantic comparison

    SciTech Connect (OSTI)

    Bergstroem, S.M. (Ohio State Univ., Columbus, OH (United States). Dept. of Geological Sciences); Kolata, D.R. (Illinois State Geological Survey, Champaign, IL (United States)); Huff, W.D. (Univ. of Cincinnati, OH (United States). Dept. of Geology)

    1993-03-01

    Little published information is available about Silurian K-bentonites in North America, but a few occurrences of such beds are known from the Great lakes region and Nova Scotia. Only a small number of beds are recorded from the former area, but the Nova Scotia occurrences include about 20 beds of Llandoverian age, the most extensive sequence of Silurian K-bentonites known in North America. In contrast, more than 150 K-bentonites occur in the Silurian successions in Baltoscandia and the British Isles. Virtually all beds in North America are of Llandoverian age. There are numerous beds of that age also in Norway, Denmark (Bornholm), the British Isles, and the Swedish mainland but the successions in Estonia, Gotland, and the British Isles also include many K-bentonites of Wenlockian and Ludlovian age. Apparently, no Pridolian beds are known in North America and northwestern Europe. Many graptolite-dated collections from more than 20 sections in Baltoscandia and from many sections in the British Isles suggest that several single beds, or complexes of beds, can be traced regionally and hence have event-stratigraphic potential. The relatively few beds known from North America all occur in biostratigraphic intervals containing K-bentonites in Europe, and it is possible that some of these beds may have a common source. The much larger number of beds in northwestern Europe compared with North America may be taken as an indication that the source area of the European K-bentonites was closer to Baltica than to Laurentia, and probably located somewhere in the northern Iapetus.

  7. Detrital-zircon geochronology of the eastern Magallanes foreland basin: Implications for Eocene kinematics of the northern Scotia Arc and Drake Passage

    E-Print Network [OSTI]

    Swanson-Hysell, Nicholas

    Detrital-zircon geochronology of the eastern Magallanes foreland basin: Implications for Eocene Editor: T.M. Harrison Keywords: provenance Drake Passage Antarctica Andes U/Pb geochronology U/Pb detrital-zircon geochronology of eleven sandstones collected from Cretaceous through Oligocene strata

  8. NEW ENGLAND aboard the SIX-STAR CRYSTAL SYMPHONY

    E-Print Network [OSTI]

    Toronto, University of

    Québec City, Quebec; Charlottetown, Prince Edward Island; Magdalen Islands, Quebec; Sydney and Halifax scenery. On Prince Edward Island, see Charlottetown and its stately buildings, then visit the Magdelan

  9. Gas lines chasing huge northeastern market

    SciTech Connect (OSTI)

    Watts, J.

    1982-03-01

    Gas for the Northeastern US market is the driving force behind three proposed projects to bring Canadian gas to the New England-New York area: the 360-mile New England States pipeline (Algonquin Gas Transmission Co., Transcontinental Gas Pipe Line Corp., Texas Eastern Transmission Corp., and Nova, an Alberta Corp.); the 261-mile Boundary Gas project (with Boundary Gas Inc., a consortium of 14 gas utilities with Tennessee Gas Pipeline Co. providing transportation); and the 158-mile Niagara pipeline (Transcontinental Gas Pipe Line Corp.). Although none has yet received government (US and Canadian) approval, at least one project - the New England States line - is expected to be operational by 1984, bringing 305 million CF of natural gas daily for US residential and industrial markets. Both countries stand to benefit from the three projects. For Canada, the sale of gas to New England provides a steady market for massive quantities of gas makes building a pipeline from gas-rich Alberta (that will also serve eastern Canada) economically feasible, and ensures the existence of a transportation network in the Maritime provinces for use when production begins off Newfoundland and Nova Scotia. For the US, the gas from Canada will help reduce the nation's dependence on foreign oil and provide additional supplies during the peakload winter season.

  10. Nucleomorph genome of Hemiselmis andersenii reveals complete intron loss and compaction

    E-Print Network [OSTI]

    Lane, Chris

    Nucleomorph genome of Hemiselmis andersenii reveals complete intron loss and compaction as a driver, Dalhousie University, Halifax, NS, Canada B3H 3J5; and Atlantic Genome Centre, Halifax, NS, Canada B3J 1S5) in size (the smallest nuclear genomes known) and to a similar three-chromosome architecture. The mo

  11. OCEAN DRILLING PROGRAM LEG 106 PRELIMINARY REPORT

    E-Print Network [OSTI]

    with the National Science Foundation. Funding for the program is provided by the following agencies: Department of Energy, Mines and Resources (Canada) Deutsche Forschungsgemeinschaft (Federal Republic of Germany (National Science Foundation, Washington, DC) Gillis, Kathryn (Dalhousie University, Halifax, Canada

  12. Direct Characterization of Airborne Particles Associated with Arsenic-rich Mine Tailings: Particle Size Mineralogy and Texture

    SciTech Connect (OSTI)

    M Corriveau; H Jamieson; M Parsons; J Campbell; A Lanzirotti

    2011-12-31

    Windblown and vehicle-raised dust from unvegetated mine tailings can be a human health risk. Airborne particles from As-rich abandoned Au mine tailings from Nova Scotia, Canada have been characterized in terms of particle size, As concentration, As oxidation state, mineral species and texture. Samples were collected in seven aerodynamically fractionated size ranges (0.5-16 {micro}m) using a cascade impactor deployed at three tailings fields. All three sites are used for recreational activities and off-road vehicles were racing on the tailings at two mines during sample collection. Total concentrations of As in the <8 {micro}m fraction varied from 65 to 1040 ng/m{sup 3} of air as measured by proton-induced X-ray emission (PIXE) analysis. The same samples were analysed by synchrotron-based microfocused X-ray absorption near-edge spectroscopy ({micro}XANES) and X-ray diffraction ({micro}XRD) and found to contain multiple As-bearing mineral species, including Fe-As weathering products. The As species present in the dust were similar to those observed in the near-surface tailings. The action of vehicles on the tailings surface may disaggregate material cemented with Fe arsenate and contribute additional fine-grained As-rich particles to airborne dust. Results from this study can be used to help assess the potential human health risks associated with exposure to airborne particles from mine tailings.

  13. Black carbon contribution to global warming

    SciTech Connect (OSTI)

    Chylek, P.; Johnson, B.; Kou, L.; Wong, J.

    1996-12-31

    Before the onset of industrial revolution the only important source of black carbon in the atmosphere was biomass burning. Today, black carbon production is divided between the biomass and fossil fuel burning. Black carbon is a major agent responsible for absorption of solar radiation by atmospheric aerosols. Thus black carbon makes other aerosols less efficient in their role of reflecting solar radiation and cooling the earth-atmosphere system. Black carbon also contributes to the absorption of solar radiation by clouds and snow cover. The authors present the results of black carbon concentrations measurements in the atmosphere, in cloud water, in rain and snow melt water collected during the 1992--1996 time period over the southern Nova Scotia. Their results are put into the global and historical perspective by comparing them with the compilation of past measurements at diverse locations and with their measurements of black carbon concentrations in the Greenland and Antarctic ice cores. Black carbon contribution to the global warming is estimated, and compared to the carbon dioxide warming, using the radiative forcing caused by the black carbon at the top of the atmosphere.

  14. The potential source of dissolved aluminum from resuspended sediments to the North Atlantic deep water

    SciTech Connect (OSTI)

    Moran, S.B.; Moore, R.M. (Dalhousie Univ., Halifax, Nova Scotia (Canada))

    1991-10-01

    Laboratory and field studies were conducted to investigate the significance of resuspended sediments as a source of dissolved Al to the deep northwest Atlantic. Sediment resuspension experiments demonstrate the effect on dissolved Al concentration (initially 11 nM) of adding natural suspended sediments (ca. 0.1-10 mg/L) to seawater. The concentration of dissolved Al increased by the resuspension of sediments; for example, addition of 0.15 mg/L sediments caused dissolved Al to increase by 10 nM. Distributions of dissolved and leachable particulate Al off the tail of the Grand Banks, near the high-energy western boundary current, show elevated levels in the near-bottom waters. The authors suggest that resuspended sediments associated with nepheloid layers along the western boundary of the North Atlantic are a source of dissolved Al. Strong western boundary currents provide the energy to resuspend and maintain intense nepheloid layers of sediments. Continued resuspension and deposition of sediments within the nepheloid layer promotes the release of Al from sediments to the overlying water. The Al-rich terrigenous sediments that predominate along the deep boundary of the Denmark Strait, Labrador Sea, Newfoundland and off Nova Scotia constitute a potentially significant source of dissolved Al. Release of Al from resuspended sediments associated with nepheloid layers at a more northern location (e.g., Denmark Strait) may contribute to the near-linear increase in dissolved Al with depth observed in the deep northwest Atlantic.

  15. Major deepwater pipelay vessel starts work in North Sea

    SciTech Connect (OSTI)

    Heerema, E.P.

    1998-05-04

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

  16. Experimental study of beta-delayed proton decay of (23)Al for nucleosynthesis in novae 

    E-Print Network [OSTI]

    Saastamoinen, A.; Trache, L.; Banu, A.; Bentley, M. A.; Davinson, T.; Hardy, John C.; Iacob, V. E.; McCleskey, M.; Roeder, B. T.; Simmons, E.; Tabacaru, G.; Tribble, Robert E.; Woods, P. J.; Aysto, J.

    2011-01-01

    The beta-delayed gamma and proton decay of (23)Al has been studied with an alternative detector setup at the focal plane of the momentum achromat recoil separator MARS at Texas AandM University. We could detect protons down to an energy of 200 ke...

  17. BDOS: An open-ended, basic disk operating system for a Nova/Diablo system 

    E-Print Network [OSTI]

    Koontz, Joseph Patrick

    1972-01-01

    ILYWWVVVVVVVVV Y YWLJcL I-r Wn, caner r 43 W & 4J 4J CI M IA IA IA IA IA IA IA IA IA ul 0 CII M LJ C4 Q Y V V V V V V V V V NCI 8'Ill dl I CO + I- M I- I- I- I- I- I- 0 W W 4J 4J 4J 4J 4i XXXXXXXXXZ XXXXXXX I-I- I-I I-I- H 4J I I ? I ? I ? I ? I ? I...

  18. Estudos apresentam novas hipteses para explicar diferenas nas trajetrias de homens e mulheres na cincia

    E-Print Network [OSTI]

    Barbosa, Marcia C. B.

    Ural a escala de 3,2 a 5,2 representa o grau de crença no talento inato. as disciplinas com valores mais altosMatemática FísicaEconomia Economia Física ciênciasdacomputação neurociência Educação Educaçãoneurociência Biologia

  19. Triassic-Jurassic faunal and floral transition in the Fundy Basin, Nova

    E-Print Network [OSTI]

    Olsen, Paul E.

    . The Triassic-Jurassic mass extinction may have cleared ecological space for dinosaurian ascent much as the K of polar ice (Frakes, 1979), this "hot house" world is marked by coal deposition in polar and equatorial

  20. Nova Virgem :b the story of a nineteenth-century Brazilian slave smuggler 

    E-Print Network [OSTI]

    Miller, Mason Daniel

    2001-01-01

    With the close of the legal transatlantic slave trade in 1807 agricultural markets of the New World were reluctant to relinquish their dependence on free labor from Africa. British insistence on the opposite eventually caused most of those who held...

  1. Gamma-Ray Emission Concurrent with the Nova in the Symbiotic...

    Office of Scientific and Technical Information (OSTI)

    Menlo Park SLAC IASF, Milan Padua U. DAPNIA, Saclay INFN, Perugia Perugia U. NASA, Goddard NASA, Goddard Maryland U., Baltimore County KIPAC, Menlo Park SLAC...

  2. II Congresso de e justia da UFPR Novas Tecnologias para o Direito e o Poder Judicirio

    E-Print Network [OSTI]

    Paraná, Universidade Federal do

    INTERNET PROFUNDA OU "DEEP WEB". Manuel Martin Pino Estrada O presente trabalho visa mostrar à comunidade mais fácil desviar dinheiro pela chamada "internet profunda" ou "deep web" e o melhor, sem ser

  3. Clean Stuff: the Latest from NOVA's "Making Stuff" Mini-Series

    Broader source: Energy.gov [DOE]

    An Argonne National Laboratory scientist discusses transforming plastics – say from grocery bags – into carbon nanotubes and spheres, which can then be used in lithium-ion batteries, as well as an array of other applications.

  4. PROGENITORS AND BIRTH-RATES OF CATACLYSMIC VARIABLES AND TYPE-I SUPER-NOVAE

    E-Print Network [OSTI]

    TRIMBLE, V

    1982-01-01

    1981. (I2) G. Tammann, in Supernovae, edited by M. J. Rees4) J. C. Wheeler, Type I Supernovae (University of Texas,production of Type I supernovae from the ancestral systems,

  5. RXTE Observations of an Outburst of Recurrent X-ray Nova GS 1354-644

    E-Print Network [OSTI]

    Mikhail G. Revnivtsev; Konstantin N. Borozdin; William C. Priedhorsky; Alexey Vikhlinin

    1999-10-13

    We present the results of Rossi X-ray Timing Explorer observations of GS 1354-644 during a modest outburst in 1997-1998. The source is one of a handful of black hole X-ray transients that are confirmed to be recurrent in X-rays. A 1987 outburst of the same source observed by Ginga was much brighter, and showed a high/soft spectral state. In contrast the 1997-1998 outburst showed a low/hard spectral state. Both states are typical for black hole binaries. The RXTE All Sky Monitor observed an outburst duration of 150 to 200 days. PCA and HEXTE observations covered ~70 days near the maximum of the light curve and during the flux decline. Throughout the observations, the spectrum can be approximated by Compton upscattering of soft photons by energetic electrons. The hot electron cloud has a temperature kT ~30 keV and optical depth tau~4--5. To fit the data well an additional iron fluorescent line and reflection component are required, which indicates the presence of optically thick cool material, most probably in the outer part of the accretion disk. Dramatic fast variability was observed, and has been analyzed in the context of a shot noise model. The spectrum appeared to be softest at the peaks of the shot-noise variability. The shape of the power spectrum was typical for black hole systems in a low/hard state. We note a qualitative difference in the shape of the dependence of fractional variability on energy, when we compare systems with black holes and with neutron stars. Since it is difficult to discriminate these systems on spectral grounds, at least in their low/hard states, this new difference might be important.

  6. Fermilab | Newsroom | Press Releases | March 28, 2013: NOvA neutrino...

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

    to construct the detector. The active section of the detector, under construction in Ash River, Minn., is about 12 feet long, 15 feet wide and 20 feet tall. The full detector...

  7. Safety and efficacy of NovaSil clay as a dietary supplement to prevent aflatoxicosis 

    E-Print Network [OSTI]

    Afriyie-Gyawu, Evans

    2006-04-12

    It is well documented that aflatoxin contamination in foods presents significant economic and public health burdens worldwide. Aflatoxins, particularly aflatoxin B1 (AFB1), have been implicated in the etiology of disease and death in many parts...

  8. Tough Stuff: A Look Back at NOVA's "Making Stuff" Mini-Series

    Broader source: Energy.gov [DOE]

    Learn more about the Department's work with material science, including imitating the structure of mother of pearl to create the toughest ceramic ever produced and developing a new type of damage-tolerant metallic glass that's stronger and tougher than steel.

  9. Mechanical design of ceramic beam tube braze joints for NOvA kicker magnets

    SciTech Connect (OSTI)

    Ader, C.R.; Reilly, R.E.; Wilson, J.H.

    2010-05-01

    The NO?A Experiment will construct a detector optimized for electron neutrino detection in the existing NuMI neutrino beam. The NuMI beam line is capable of operating at 400 kW of primary beam power and the upgrade will allow up to 700 kW. Ceramic beam tubes are utilized in numerous kicker magnets in different accelerator rings at Fermi National Accelerator Laboratory. Kovar flanges are brazed onto each beam tube end, since kovar and high alumina ceramic have similar expansion curves. The tube, kovar flange, end piece, and braze foil alloy brazing material are stacked in the furnace and then brazed. The most challenging aspect of fabricating kicker magnets in recent years have been making hermetic vacuum seals on the braze joints between the ceramic and flange. Numerous process variables can influence the robustness of conventional metal/ceramic brazing processes. The ceramic-filler metal interface is normally the weak layer when failure does not occur within the ceramic. Differences between active brazing filler metal and the moly-manganese process will be discussed along with the applicable results of these techniques used for Fermilab production kicker tubes.

  10. Nova Mediates Experience Dependent Processing of Orb2A mRNA

    E-Print Network [OSTI]

    Gill, Jason Singh

    2013-08-31

    Memory serves the vital function of associating disparate stimuli to modify future behavior for fitness. For instance, Drosophila melanogaster can learn to associate neutral odors with sweet metabolically available sugars ...

  11. Usina Nova Uni o S A A car e lcool | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop IncIowa (Utility Company) JumpGTZ ClimateFeedUratMaringa Jump to:Mundial Jump to:o

  12. Gamma-Ray Emission Concurrent with the Nova in the Symbiotic Binary V407

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfate Reducing(Journal Article) |productionPatent: FreeformArticle)Gamma source forCygni (Journal

  13. Gamma-Ray Emission Concurrent with the Nova in the Symbiotic Binary V407

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfate Reducing(Journal Article) |productionPatent: FreeformArticle)Gamma source forCygni (JournalCygni

  14. THE INTER-ERUPTION TIMESCALE OF CLASSICAL NOVAE FROM EXPANSION OF THE Z

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail. (Conference)Feedback SystemGimbaled X-Ray Head (Journal Article) |FERMI|

  15. Torus through Integrated Data Analysis Mark Nornberg Matthew Galante (Nova Photonics)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorking With U.S.Week DayDr.Theories81 toDepartment ofTopo Blue Gene/Q VersusZ

  16. Petra Nova Project Breaks Ground on World's Largest Post-Combustion

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuelsof EnergyAprilEnergyPartnership for Energy

  17. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    and that at least some classical novae become dwarf novae long after their nova thermonuclear outbursts, in accord with the hibernation scenario of cataclysmic binaries. Here...

  18. TITLE AUTHORS SUBJECT SUBJECT RELATED DESCRIPTION PUBLISHER AVAILABILI...

    Office of Scientific and Technical Information (OSTI)

    and that at least some classical novae become dwarf novae long after their nova thermonuclear outbursts in accord with the hibernation scenario of cataclysmic binaries Here we...

  19. "Title","Creator/Author","Publication Date","OSTI Identifier...

    Office of Scientific and Technical Information (OSTI)

    and that at least some classical novae become dwarf novae long after their nova thermonuclear outbursts, in accord with the hibernation scenario of cataclysmic binaries. Here...

  20. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    and that at least some classical novae become dwarf novae long after their nova thermonuclear outbursts. The current size of the shell, its known distance, and the largest...

  1. A Rodaviva das Tecnologias Novas tecnologias do origem, em geral, a novos modelos de negcio que por sua vez

    E-Print Network [OSTI]

    de Figueiredo, Luiz Henrique

    por sua vez ocasionam grandes impulsos na economia. Clayton Christensen, da Harvard Business School a reencarnação do processamento distribuído em escala global. Noutras palavras, o processamento distribuído onde. Um marco definitivo para o reflexo dessa reencarnação na economia será a arquitetura .NET da

  2. Tabula privilegiorum, quae sanctissimus Papa Pius Quintus, concessit fratribus mendicantibus: in bulla confirmationis, & novae, concessionis privilegiorum, ordinum mendicantium. Anno 1567 

    E-Print Network [OSTI]

    Catholic Church. Pope (1566-1572 : Pius V)

    2010-10-16

    -Ryegrass Grazing System L. R. Nelson. F. M. Rouquette. Jr .? and R. D. Randel* W heat is an important cool-season annual forage and grain crop in Texas. Wheat acreage in Texas varies from 5 million to over 8 million acres (11) depending on economic incentives... have been viral) was the cause of the illness. Neither the Brangus nor crossbreed cattle were affected by the illness. Grain yields. The grain yields in 1980-81 av eraged 37 bulA (Table 5) and were near average for east Texas. Through small samples...

  3. Reverendi patris fratris Bartholomaei à Ledesma ordinis praedicatorum et sacrae theologiae professoris De septem novae legis sacramentis summarium 

    E-Print Network [OSTI]

    Ledesma, Bartolomé de, ca. 1515-1604

    2011-03-22

    face cell. 2. Enlarge diffuser opening to 16 by 46 inches. 3. Replace 1/2-inch hardware cloth by #3 stainless cane weave with 2-inch mesh, painted white. 4. Replace ballasts with Advance R-2S40-TP Mark III or equivalent. 5. Replace blankets with light...

  4. Reverendi patris fratris Bartholomaei à Ledesma ordinis praedicatorum et sacrae theologiae professoris De septem novae legis sacramentis summarium 

    E-Print Network [OSTI]

    Ledesma, Bartolomé de, ca. 1515-1604 Reverendi patris fratris Bartholomaei à Ledesma ordinis praedicatorum et sacrae theologiae professoris De septem novae legis sacramentis summarium  Ledesma, Bartolomé de, ca. 1515-1604 Preparing for the Unexpected (Spanish)  Harris, Janie; Norman, Lisa; Smith, David; Lesikar, Bruce J.

    2007-04-23

    inesperado Prep?rese para B-6178S 04-07 D esde el 11 de septiembre de 2001, mucho ha cambiado en nuestro mundo, naci?n, estado y comunidad. Estamos mucho m?s conscientes de la devastaci?n que pueden causar los desastres inesperados -sean causados por la... naturaleza, por accidentes o por ataques terroristas. Con frecuencia nos preocupa ?la posibilidad de lo desconocido? y nos preguntamos qu? podemos hacer para protegernos y proteger a nuestras familias. Para disminuir las amenazas a las personas en Texas...

  5. A study of CR-39 track response to charged particles from NOVA T. W. Phillips and M. D. Cable

    E-Print Network [OSTI]

    in the CR- 39. The manipulators permit the positioning of the package at various distances from the target enhanced image, and c tracks identified. Tracks labeled 6, 31, 35, and 48 are double and can

  6. Novas ferramentas para analise do controle auton^omico Daniel Lucas Ferreira e Almeida (daniel.lucas@msn.com)

    E-Print Network [OSTI]

    Carvalho, João Luiz

    ´otimo do passo s ´e obtido com base no comprimento inicial das janelas (l0) (Tabela 1). Tabela 1: Espa do espa¸camento n~ao uniforme das amostras de f(x). Sinais e Pr´e-processamento Banco de dados da

  7. O Tratamento do Poder Econômico nos Contratos Empresariais: conspectos e novas realidades para a doutrina jurídica brasileira

    E-Print Network [OSTI]

    de Oliveira Mattosinho, Daniel Lemos; Carlotti, Danilo Panzeri

    2012-01-01

    ex- presidente da Bolsa de Valores do Estado de São Paulo (transformações na Bolsa de Valores cuja implementação foi

  8. Assessment of radiological releases from the NuMI facility during MINOS and NOvA operations

    SciTech Connect (OSTI)

    Martens, Mike; /Fermilab

    2007-04-01

    This report makes projections of the radiological releases from the NuMI facility during operations for the MINOS and NO ?A experiments. It includes an estimate of the radionuclide levels released into the atmosphere and the estimated tritium and sodium-22 concentrations in the NuMI sump water and Fermilab pond system. The analysis was performed for NuMI operations with a beam power on target increased from the present 400 kW design up to a possible 1500 kW with future upgrades. The total number of protons on target was assumed to be 18 x 10{sup 20} after the completion of MINOS and 78 x 10{sup 20} after the completion of NO ?A.

  9. On the fate of the Antarctic Slope Front and the origin of the Weddell Front

    E-Print Network [OSTI]

    Naveira Garabato, Alberto

    Oceanography: Physical: Fronts and jets; 4532 Oceanography: Physical: General circulation; 4536 Oceanography: Physical: Hydrography; 4207 Oceanography: General: Arctic and Antarctic oceanography; 4223 Oceanography: General: Descriptive and regional oceanography; KEYWORDS: topographic interaction, Weddell Scotia

  10. Ice-rafted debris in the Southern Ocean : potential uses and limitations of ²³?Th-normalized fluxes

    E-Print Network [OSTI]

    Fujimori, Jessica E. (Jessica Eileen)

    2014-01-01

    We measured IRD fluxes from 22-5 ka BP in two sediment cores from the Scotia Sea using two different methods. The first, commonly used method, uses the linear sedimentation rate (LSR), dry bulk density, and weight percent ...

  11. Dunn Library Subscription Changes 2013-15 [$160,000 in costs

    E-Print Network [OSTI]

    Lotze, Heike K.

    of the Legislative Assembly of Prince Edward Island Lois du Quebec (French language version) Manitoba Gazette (Parts Scotia Royal Gazette Prince Edward Island Legislative Assembly Bills (1st rea

  12. Knowledge Sharing for Pediatric Pain Management via a Web 2.0 Framework

    E-Print Network [OSTI]

    Abidi, Syed Sibte Raza

    , Khon Kaen, Thailand c CentreforPediatricPainResearch, IWKHealthCentre,Halifax,Canada Abstract that engages in collaborative learning and problem solving. We present the design and use of a web portal project concerning pediatric pain management in hospitals across Northern Thailand. We demonstrate the use

  13. Atmos. Chem. Phys., 12, 45394554, 2012 www.atmos-chem-phys.net/12/4539/2012/

    E-Print Network [OSTI]

    Meskhidze, Nicholas

    Sciences, Harvard University, Cambridge, MA, USA 3Electric Power Research Institute, Washington, DC, USA 4Electric Power Research Institute, Palo Alto, CA, USA 5Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Canada 6Ministry of Education Key Laboratory for Earth System Modeling

  14. Modeling Realistic Events of the Maine Coastal Current Monica J. Holboke 1

    E-Print Network [OSTI]

    Modeling Realistic Events of the Maine Coastal Current Monica J. Holboke 1 Abstract The Maine Coastal Current (MCC) is an along­shore current off the coast of New England in the Gulf of Maine. The computational domain encompasses the Gulf of Maine with a cross­shelf upstream boundary at Halifax and an along

  15. STAG UK Newsletter Issue 24 

    E-Print Network [OSTI]

    1977-01-01

    Ovonden 'Nay, Halifax, West Yorks. 6 zincs available. This is the club organising Terracon '77. STERB, John Hind, 14 Bingham Rd, Radcliffe-on-Trent, Notts. Zine - Murasaki Journal. STIG, Ross Carter, 29 Castle Rd, Southsea, Portsmouth. STliRBASE 13...

  16. "Lost in the Pacific" Biography of TSgt. Paul Fredrick Adler MIA 1943 

    E-Print Network [OSTI]

    Adler, Paul Earl; Adler, Paul Earl

    2010-08-24

    PA'l'HY - Pres. Dot Owens, 30 OVElllden Way, Lee Mount, Halifax, West Yorks. Good general ST club, they soIl various ST fanzines. S'l'AT{ TItEK INFORMA'l'IOll GIWUP - Hoss Carter, 29 Castle Hoad, Southsea, Portsmouth. OEICOHll - Tracy Cooke, 67 Eden Grove...

  17. Phoenix-UrbanNon-Sacramentorural.

    E-Print Network [OSTI]

    Hall, Sharon J.

    ). Transportation 52% Coal 2% Wood/biomass 1% Petroleum 5% Natural gas 5% Wastewater 1% Total electricity 34% Carbon). Boulder,CO. Shorewood,WI. Nat'lave. Chuncheon,Korea Natural. Kangleung,Korea Natural. Sacramento,CA. Sacramentocity,CA. USNaturalForests. Junglang,Seoul, KoreaNatural. Kangnam,Seoul, KoreaNatuiral. Halifax

  18. Methods to account for spatial autocorrelation in the analysis of species distributional data: a review

    E-Print Network [OSTI]

    Myers, Ransom A.

    ., 1355 Oxford Street Halifax NS, B3H 4J1 Canada. Á M. B. Arau´jo, Dept de Biodiversidad y Biologi, Maulbeerallee 2, DE-14469 Potsdam, Germany. Á R. Wilson, A´rea de Biodiversidad y Conservacio´n, Escuela

  19. Visualizing information

    E-Print Network [OSTI]

    Ernst, Damien

    GEURTS and Louis WEHENKEL University of Li` ege ­ Belgium I. Data mining in power systems II. Dynamic+ + LESCOPE'98 Halifax, June 1998 Visualizing Dynamic Power System Scenarios for Data Mining Pierre. Wehenkel ­ June 1998 2 + + I. Data mining in power systems Data mining ? ffl Aims at extracting useful (and

  20. Going from bad to worse: A stochastic model of transitions in deficit accumulation, in relation to mortality

    E-Print Network [OSTI]

    Mitnitski, Arnold B.

    a worse health state, and has a higher likelihood of an adverse health outcome, such as death University, Halifax, NS, Canada B3H 1V7 b Geriatric Medicine Research Unit, Dalhousie University, Suite 1421 of death is known to be exponentially related to the number of deficits. Using data from elderly (aged 65

  1. Scientific Prospectus Site: WP-1B

    E-Print Network [OSTI]

    drift 4. Determine Tertiary climate record 5. Determine the history of Tertiary aeolian transport 6 Department of Earth Sciences Dalhousie University Halifax, NS B3H 3J5 Canada Internet: matts University of Tokyo Yayoi 1-1-1, Bunkyo-ku Tokyo 113-0032 Japan Internet: mshino@eri.u-tokyo.ac.jp Work: (81

  2. Letting Go: True autonomy in an AUV

    E-Print Network [OSTI]

    Griffiths, Gwyn

    vessel - weighs 112 kg in air #12;Recovery on Scotia July 1999 Deployment & Recovery on FRV Scotia, North(tonnes) missions 193-195 mission 196 Biomass comparison: 0.1 n.mi. resolution From Fernandes, Brierley, et al test (mean of differences = 0) p>0.05 10 0 10 1 10 2 10 3 10 0 10 1 10 2 10 3 AUV fish biomass (tonnes

  3. The Role of Advanced Process Control in Your Energy Management Solution 

    E-Print Network [OSTI]

    Johnson, K.; Van Wyk, L.

    2010-01-01

    , Customization, Innovation NovaTech EAMS The Role of Advanced Process Control in your Energy Management Solution IETC Conference May 2010 Presentation title Service, Customization, Innovation NovaTech @ a Glance ? Three Primary Business Units: ? Nova... Who is NovaTech Presentation title Service, Customization, Innovation NovaTech @ a Glance ? Agro Processing ? Brewing ? Food & Beverage ? Energy/Utilities ? Heavy Industry ? Pharmaceutical ? Specialty Chemical NovaTech?s Industry Focus...

  4. ICF program annual report, 1988--89

    SciTech Connect (OSTI)

    Not Available

    1993-09-01

    This report contains discussions on the following topics: Target Physics; Nova Experiments; Nova Laser Science and Technology; Target Science and Technology; Advanced Drivers; and ICF Applications.

  5. A new phylogeny-based generic classification of Costaceae (Zingiberales)

    E-Print Network [OSTI]

    Specht, Chelsea D.; Stevenson, Dennis Wm.

    2006-01-01

    Nova Acta Phys. -Med. Acad. Caes. Leop. - Carol. Nat. Cur.Nova Acta Phys. -Med. Acad. Caes. Leop. - Carol. Nat. Cur.

  6. AS TEORIAS RIVAIS SOBRE A PROPRIEDADE INTELECTUAL NO BRASIL

    E-Print Network [OSTI]

    Timm, Luciano Benetti; Caovilla, Renato

    2009-01-01

    e antigas (ou nem tão antigas) tecnologias são superadaspor novas tecnologias. Trata-se da idéia “schumpeteriana” dee desenvolvimento em novas tecnologias. Com efeito, o mesmo

  7. Entre a Proteção e a Eficiência: Evidências de Seleção Adversa no Mercado Brasileiro de Saúde Suplementar Após a Regulamentação

    E-Print Network [OSTI]

    Alves, Sandro Leal

    2007-01-01

    muitas dessas novas tecnologias são não substitutivas ePrestadores Aquisição de tecnologias e medicamentosincorporação de novas tecnologias tornará o plano de saúde

  8. Mercury Information Clearinghouse

    SciTech Connect (OSTI)

    Chad A. Wocken; Michael J. Holmes; Dennis L. Laudal; Debra F. Pflughoeft-Hassett; Greg F. Weber; Nicholas V. C. Ralston; Stanley J. Miller; Grant E. Dunham; Edwin S. Olson; Laura J. Raymond; John H. Pavlish; Everett A. Sondreal; Steven A. Benson

    2006-03-31

    The Canadian Electricity Association (CEA) identified a need and contracted the Energy & Environmental Research Center (EERC) to create and maintain an information clearinghouse on global research and development activities related to mercury emissions from coal-fired electric utilities. With the support of CEA, the Center for Air Toxic Metals{reg_sign} (CATM{reg_sign}) Affiliates, and the U.S. Department of Energy (DOE), the EERC developed comprehensive quarterly information updates that provide a detailed assessment of developments in the various areas of mercury monitoring, control, policy, and research. A total of eight topical reports were completed and are summarized and updated in this final CEA quarterly report. The original quarterly reports can be viewed at the CEA Web site (www.ceamercuryprogram.ca). In addition to a comprehensive update of previous mercury-related topics, a review of results from the CEA Mercury Program is provided. Members of Canada's coal-fired electricity generation sector (ATCO Power, EPCOR, Manitoba Hydro, New Brunswick Power, Nova Scotia Power Inc., Ontario Power Generation, SaskPower, and TransAlta) and CEA, have compiled an extensive database of information from stack-, coal-, and ash-sampling activities. Data from this effort are also available at the CEA Web site and have provided critical information for establishing and reviewing a mercury standard for Canada that is protective of environment and public health and is cost-effective. Specific goals outlined for the CEA mercury program included the following: (1) Improve emission inventories and develop management options through an intensive 2-year coal-, ash-, and stack-sampling program; (2) Promote effective stack testing through the development of guidance material and the support of on-site training on the Ontario Hydro method for employees, government representatives, and contractors on an as-needed basis; (3) Strengthen laboratory analytical capabilities through analysis and quality assurance programs; and (4) Create and maintain an information clearinghouse to ensure that all parties can keep informed on global mercury research and development activities.

  9. A study of algal biomass potential in selected Canadian regions.

    SciTech Connect (OSTI)

    Passell, Howard David; Roach, Jesse Dillon; Klise, Geoffrey T.

    2011-11-01

    A dynamic assessment model has been developed for evaluating the potential algal biomass and extracted biocrude productivity and costs, using nutrient and water resources available from waste streams in four regions of Canada (western British Columbia, Alberta oil fields, southern Ontario, and Nova Scotia). The purpose of this model is to help identify optimal locations in Canada for algae cultivation and biofuel production. The model uses spatially referenced data across the four regions for nitrogen and phosphorous loads in municipal wastewaters, and CO{sub 2} in exhaust streams from a variety of large industrial sources. Other data inputs include land cover, and solar insolation. Model users can develop estimates of resource potential by manipulating model assumptions in a graphic user interface, and updated results are viewed in real time. Resource potential by location can be viewed in terms of biomass production potential, potential CO{sub 2} fixed, biocrude production potential, and area required. The cost of producing algal biomass can be estimated using an approximation of the distance to move CO{sub 2} and water to the desired land parcel and an estimation of capital and operating costs for a theoretical open pond facility. Preliminary results suggest that in most cases, the CO{sub 2} resource is plentiful compared to other necessary nutrients (especially nitrogen), and that siting and prospects for successful large-scale algae cultivation efforts in Canada will be driven by availability of those other nutrients and the efficiency with which they can be used and re-used. Cost curves based on optimal possible siting of an open pond system are shown. The cost of energy for maintaining optimal growth temperatures is not considered in this effort, and additional research in this area, which has not been well studied at these latitudes, will be important in refining the costs of algal biomass production. The model will be used by NRC-IMB Canada to identify promising locations for both demonstration and pilot-scale algal cultivation projects, including the production potential of using wastewater, and potential land use considerations.

  10. In: New Transportation Research Progress ISBN: 978-1-60456-032-9 Editor: Filip N. Gustavsson, pp. - 2007 Nova Science Publishers, Inc.

    E-Print Network [OSTI]

    Kockelman, Kara M.

    framework based on the ELECTRE IV algorithm to rank different technologies. Such a framework complements technology investment decisions under different pricing schemes. Keywords: Congestion Pricing, ELECTRE IV Identification (AVI) transponders. All vehicles with transponders and a pre-paid account were eligible to use

  11. A Roda-viva das Tecnologias Novas tecnologias do origem, em geral, a novos modelos de negcio que por sua vez

    E-Print Network [OSTI]

    de Figueiredo, Luiz Henrique

    por sua vez ocasionam grandes impulsos na economia. Clayton Christensen, da Harvard Business School a reencarnação do processamento distribuído em escala global. Noutras palavras, o processamento distribuído onde. Um marco definitivo para o reflexo dessa reencarnação na economia será a arquitetura .NET da

  12. In: Advances in Genetics Research. Volume 4 ISBN 978-1-61728-764-0 Editor: Kevin V. Urbano, pp. 2010 Nova Science Publishers, Inc.

    E-Print Network [OSTI]

    Yu, Peter K.N.

    the irradiated cells, with the effect particularly significant in the low radiation-dose regime. The existence of RIBE led to a non-linear relationship between the cancer risk and the radiation dose (in the low-dose protection against low-dose environmental radiation as well as during radiotherapy. 1. Introduction

  13. In: Computer Physics Research Trends ISBN: 978-160021-595-7 Editor: Silvan J. Bianco, pp. 119-150 2007 Nova Science Publishers, Inc.

    E-Print Network [OSTI]

    Yu, Peter K.N.

    TRACK DETECTORS D. Nikezic and K.N. Yu Department of Physics and Materials Science, City University processes, optimization for the measurements, and determination of calibration coefficients in some (222 Rn). The radon gas is originated from the ground and other materials containing its predecessor

  14. In: Nuclear Track Detectors: Design, Methods and Applications ISBN: 978-1-60876-826-4 Editor: Maksim Sidorov and Oleg Ivanov 2009 Nova Science Publishers, Inc.

    E-Print Network [OSTI]

    Yu, Peter K.N.

    natural radiation dose to human and can induce lung cancers. These alpha-particle radiobiological-PARTICLE RADIOBIOLOGICAL EXPERIMENTS INVOLVING SOLID STATE NUCLEAR TRACK DETECTORS AS SUBSTRATES K. N. Yu and D. Nikezic Kong. ABSTRACT Alpha-particle radiobiological experiments involve irradiating cells with alpha

  15. NOVAS APLICAES MULTIMDIA NA INTERNET 2 V. Bastos, E.Bergamini#, L. Ceze, T.C.M.B. Carvalho, J. Figueiredo*, S.S. Furuie*,

    E-Print Network [OSTI]

    Ceze, Luis

    o desempenho da rede, verificado através de software de gerenciamento. Palavras Chave: Internet 2-acesso, todos com suporte a protocolos de roteamento IP, protocolos para IP multicast e #12;software agente SNMP possível devido ao uso de uma estação de gerenciamento, através da qual era possível avaliar a operação dos

  16. 1. (P) M.I. Ojovan, W.E. Lee. New Developments in Glassy Nuclear Wasteforms. Nova Science Publishers, New York, 131p. (2007).

    E-Print Network [OSTI]

    Ojovan, Michael

    2007-01-01

    and selection of processing technologies. Chapter 1, In Handbook of advanced radioactive waste conditioning,W.E. Lee. Crystalline Materials for Actinide Immobilisation, Imperial College Press, London, 198 pp. (2010). Handbook of advanced radioactive waste conditioning technologies. CRC Press, USA http

  17. Nova Science Publishers, Inc. Hauppauge, New York ISSN 1933-0324 Journal of Nature Science and Sustainable Technology, Volume 2, Issue 3, 2007

    E-Print Network [OSTI]

    Hossain, M. Enamul

    . This process not only lowers the steam generation cost but also reduces the amount of air pollutants released environmental pollution. The temperature distribution is very important in thermal oil recovery. Increasing

  18. ARTIGO INTERNET Jovens em Cincia Viva

    E-Print Network [OSTI]

    Instituto de Sistemas e Robotica

    embebidos, novas formas de produzir, armazenar e transformar energia eléctrica (células fotovoltaicas

  19. Universidade de Braslia Decanato de Ensino de Graduao

    E-Print Network [OSTI]

    Lucero, Jorge Carlos

    seccional no Moodle: inserção da Radiologia Oral nas novas diretrizes curriculares no curso de Odontologia 1

  20. The Particle Therapy Cancer Research Institute is a member of

    E-Print Network [OSTI]

    Nova? To deliver a lower-cost, smaller, lighter, more energy efficient solution for Proton Therapy without for commercial distribution at this time #12;Who is ProNova? ProNova has a strong History of Innovation Developed accessible to the cancer community #12;ProNova Design Principles - Workflow Precision, Productivity, Cost RT

  1. Research article Inhibition of SnRK1 by metabolites: Tissue-dependent effects and cooperative

    E-Print Network [OSTI]

    Davis, Ben G.

    Biotecnologia de Células Vegetais, Universidade Nova de Lisboa, Apartado 127, 2781-901 Oeiras, Portugal c

  2. Free, Social, and Inclusive: Appropriation and Resistance of New Media Technologies in Brazil

    E-Print Network [OSTI]

    Horst, Heather A

    2011-01-01

    de Palestras sobre Novas Tecnologias na Educação. Retrievedapresentado no GT de Tecnologias da Comunicacao e da

  3. Basics, types Evolution

    E-Print Network [OSTI]

    Crenshaw, Michael

    to nuclear fusion. · Novae radiate primarily in the UV to X-ray region. · Types: ­ Classical Novae: only one is hot enough for explosive fusion. For classical novae, this happens on a time scale of 103 ­ 105 years. · Thermonuclear runaway (TNR): capture of protons by heavy elements (CNO cycle), happens in seconds #12;5 Novae

  4. Future world oil production: Growth, plateau, or peak?1 Larry Hughes and Jacinda Rudolph

    E-Print Network [OSTI]

    Hughes, Larry

    ERG/201005 Future world oil production: Growth, plateau, or peak?1 Larry Hughes and Jacinda Rudolph Energy Systems 2010 #12;Future world oil production: Growth, plateau, or peak? Larry Hughes2 and Jacinda Scotia, Canada Abstract With the exception of two oil shocks in the 1970s, world oil production

  5. Deep-Sea Research I 49 (2002) 681705 Modification and pathways of Southern Ocean Deep Waters

    E-Print Network [OSTI]

    Naveira Garabato, Alberto

    2002-01-01

    Deep-Sea Research I 49 (2002) 681­705 Modification and pathways of Southern Ocean Deep Waters of the deep water masses flowing through the region, and to quantify changes in their properties as they cross and pathways of deep water masses in the Scotia Sea had remained poorly documented despite their global

  6. Computer Physics Communications 30 (1983) 255--257 255 North-Holland Publishing Company

    E-Print Network [OSTI]

    Creutz, Michael

    1983-01-01

    * Michael CREUTZ Department of Physics, Brookhaven National Laboratory, Upton, NY 11973, USA and K Scotia, Canada B3H 4H8 Received 30 June 1983; in revised form 11 July 1983 ADAPTATION SUMMARY Title calculations. We wish to apply this technique to Adaption number: 0001 SU(3) gauge theory. Programs obtainable

  7. A PECULIARITY OF THE WILCOXON-MANN-WHITNEY RANK-SUM TEST

    E-Print Network [OSTI]

    A PECULIARITY OF THE WILCOXON-MANN-WHITNEY RANK-SUM TEST Scotia Canada B3H 3C3 Keywords: intransitivity, rank-sum test, Behrens-Mann-Whitney test is a test of relative location whenever the two distributions are symmetric. By con- trast

  8. SANFRANCISCO MokelumneCamanche

    E-Print Network [OSTI]

    Petaluma Napa Novato San Francisco Oakland San Mateo OakdaleTracy Manteca Lodi Rio Vista Galt Elk Grove Hawthorne Mammoth Lakes Benton TonopahSan Jose Morgan Hill Santa Clara Klamath Cedarville Paynes Creek Scotia Leggett Rancho Cordova Lincoln Loomis Coloma Volcano Mokelumne Hill Chinese Camp June Lake

  9. Response of Montia howellii (Howell's montia) to Road Management in California

    E-Print Network [OSTI]

    Redwood Company timberlands it occurs on native surface or lightly rocked roads and turnouts, and in wet of the Portulacaceae (purslane family). Germinating in late fall, it grows through the early spring, flowers from, Humboldt Redwood Company, LLC, P.O. Box 712, Scotia, CA 95565. (mrenner@hrcllc.com). 3 Staff botanists

  10. Fermilab Today

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

    used to help assemble the NOvA far detector. He was responsible for all aspects of the mechanical design of the NOvA near detector. Most recently he served as assembly task...

  11. CURRICULUM VITAE ROSALYN J MORAN PhD

    E-Print Network [OSTI]

    Moran, Rosalyn

    of Computational Neuroscience - Physica D - Biological Cybernetics - Frontiers in Human Neuroscience Ad, NOVA Technology Transfer Centre, University College Dublin. Nov 2005. Invited Speaker, Campus Company Development Program, NOVA Technology Transfer Centre, University College Dublin. Sept 2006. Student Award

  12. Fermilab Today | University of Minnesota - Twin Cities Profile

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

    of large scale projects from building modules for the MINOS and NOvA detectors to managing the Soudan Underground Laboratory and the NOvA Ash River Laboratory. FUNDING AGENCY: DOE...

  13. Press Pass - Press Release - Single top quark

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

    of Orr, Minn., discusses the impact NOvA will have on his city. The proprietors of the Ash Trail Lodge in Ash River, Minn., discuss the impact NOvA will have on their business...

  14. Laboratories are Needed to Explore, Explain VLBACHANDRA

    E-Print Network [OSTI]

    Metrics · Fusion Gain (Qp) · Fusion Energy Density · Duty Cycle/Repetition Rate The Grand Challenge drive Nova indirect drive Nova direct drive Laser D-T #12;Fusion Science Objectives for a Major Next

  15. Internet Policies and Issues, vol. 9, Editor B.G. Kutais, ova Science Publishers Editor B.G. Kutais, Nova Science Publishers, B.G. Kutais (Ed.), pp. 75-91, July 2011

    E-Print Network [OSTI]

    Varela, Carlos

    places in the world, the scientific community is saturated. Hence, scientific processes will change the Scientific Community and the Internet with Peer Review as one of the Core Scientific Processes Josep Lluis de in Asian countries. This structure may not be well suited to the unknown future we face. Today's scientific

  16. El Consell Social de la UPF convoca una nova edici del Premi UPF Emprn a la iniciativa i a la capacitat empresarial, per incentivar la cultura emprenedora dels joves

    E-Print Network [OSTI]

    de la vida, comunicació i tecnologies de la informació o disseny i arquitectura). Tots els candidats inexistent, millores de productes o serveis existents, aplicació de noves tecnologies a diferents processos d serveis existents, aplicació de noves tecnologies a diferents processos d'empresa, ...) c) viabilitat

  17. Tiragem: 41360 Pas: Portugal

    E-Print Network [OSTI]

    Instituto de Sistemas e Robotica

    a propriedade da nova Universidade de Lisboa passa também a bomba de gasolina contí- gua ao hipódromo. Esta

  18. DOG Nm. 166 Venres, 31 de agosto de 2012 Px. 34798 ISSN1130-9229 Depsito legal C.494-1998 http://www.xunta.es/diario-oficial-galicia

    E-Print Network [OSTI]

    Fraguela, Basilio B.

    , así como da Lei 2/2011, do 4 de marzo, de economía sustentable, que establecen unha nova regulación

  19. A HISTÓRIA DO PENSAMENTO EM DIREITO E ECONOMIA REVISITADA: CONEXÕES COM O ESTUDO DA RESPONSABILIDADE CIVIL NO BRASIL

    E-Print Network [OSTI]

    Battesini, Eugênio; Balbinotto, Giácomo

    2010-01-01

    na descoberta de novas tecnologias de produção que reduzamde controle do trabalho, tecnologias, hábitos de consumo e

  20. Ordenao por Block-Interchanges e Reverses com Sinais

    E-Print Network [OSTI]

    Ayala-Rincón, Mauricio

    interessantes (novas estruturas de dados, algoritmos e etc.). Cleber Mira, João Meidanis Block-Interchanges e interessantes (novas estruturas de dados, algoritmos e etc.). Cleber Mira, João Meidanis Block-Interchanges e interessantes (novas estruturas de dados, algoritmos e etc.). Cleber Mira, João Meidanis Block-Interchanges e

  1. Solid state laser technology for inertial confinement fusion: A collection of articles from ''Energy and Technology Review''

    SciTech Connect (OSTI)

    Not Available

    1988-06-01

    This paper contains reprinted articles that record several milestones in laser research at LLNL. ''Neodymium-Glass Laser Research and Development at LLNL'' recounts the history of the Laser Program and our work on neodymium-glass lasers. ''Nova Laser Technology'' describes the capabilities of the Nova laser and some of its uses. ''Building Nova: Industry Relations and Technology Transfer'' illustrates the Laboratory's commitment to work with US industry in technology development. ''Managing the Nova Laser Project'' details the organization and close monitoring of costs and schedules during the construction of the Nova laser facility. The article ''Optical Coatings by the Sol-Gel Process,'' describes our chemical process for making the damage-resistant, antireflective silica coatings used on the Nova laser glass. The technical challenges in designing and fabricating the KDP crystal arrays used to convert the light wave frequency of the Nova lasers are reported in ''Frequency Conversion of the Nova Laser.'' Two articles, ''Eliminating Platinum Inclusions in Laser Glass'' and ''Detecting Microscopic Inclusions in Optical Glass,'' describe how we dealt with the problem of damaging metal inclusions in the Nova laser glass. The last article reprinted here, ''Auxilliary Target Chamber for Nova,'' discusses the diversion of two of Nova's ten beamlines into a secondary chamber for the purpose of increasing our capacity for experimentation.

  2. On the spreading of Weddell Sea deep water in the southwestern Atlantic Ocean 

    E-Print Network [OSTI]

    Locarnini, Ricardo A

    1991-01-01

    that this WSDW, flowing northeastward through the Georgia Passage, might supply part of the coldest bottom water that enters the Argentine Basin through the Falkland Ridge Gap. 23 THE SCOTIA SEA AND THE WEDDELL SEA DEEP WATER OUTFLOW The occurrence...ON THE SPREADING OF WEDDELL SEA DEEP WATER IN THE SOUTHWESTERN ATLANTIC OCEAN A Thesis by RICARDO ALEJANDRO LOCARNINI Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements...

  3. On the Radiated Noise of the Autosub AUV

    E-Print Network [OSTI]

    Griffiths, Gwyn

    ;Radiated noise of Container Ship 1 #12;FRV Scotia: Noise reduction measures t The engine is diesel: shipping, wind, rain & ice 10 20 30 40 50 60 70 80 90 100 110 120 130 140 10 100 1000 10000 100000 Centre/s wind Quartley Drizzle with 2 m/s windQuartley Wind 10 m/s Quartley Wind 2 m/sQuartley Wind 1 m

  4. Explosive nucleosynthesis

    E-Print Network [OSTI]

    M. Hernanz

    2001-03-26

    Many radioactive nuclei relevant for gamma-ray astrophysics are synthesized during explosive events, such as classical novae and supernovae. A review of recent results of explosive nucleosynthesis in these scenarios is presented, with a special emphasis on the ensuing gamma-ray emission from individual nova and supernova explosions. The influence of the dynamic properties of the ejecta on the gamma-ray emission features, as well as the still remaining uncertainties in nova and supernova models is also reviewed.

  5. Performance of deterministic and adaptive broadcast algorithms in multicomputer networks

    E-Print Network [OSTI]

    Al-Dubai, A.Y.; Ould-Khaoua, M.

    Al-Dubai,A.Y. Ould-Khaoua,M. Mackenzie,L.M. International Journal of High Performance Computing and Networking (IJHPCN), to appear Nova Science Publishers

  6. Fermilab Today

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

    up From Physics, July 28, 2015: Synopsis: Entangled mirrors could "reflect" quantum gravity From NOVA's Nature of Reality, July 28, 2015: What the heck is a pentaquark?...

  7. The New Milky Way: a wide-field survey of optical transients near the Galactic plane

    E-Print Network [OSTI]

    Sokolovsky, Kirill; Lebedev, Alexandr

    2013-01-01

    Currently, it may take days for a bright nova outburst to be detected. With the few exceptions, little is known about novae behaviour prior to maximum light. A theoretically-predicted population of ultra-fast novae with t2pipeline is based on the open source VaST software. We describe the instrument design and report results of the first observations conducted in October-November 2011 and January-April 2012. The results include the discovery of Nova Sagittarii 2012 No. 1 as well as two X-ray emitting cataclysmic v...

  8. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    (2) dwarf stars (2) emission (2) galactic evolution (2) luminosity (2) novae (2) optical properties (2) physical properties (2) spectroscopy (2) telescopes aromatics (2)...

  9. Science and technology review, September 1997

    SciTech Connect (OSTI)

    Upadhye, R.

    1997-09-01

    This month`s issue contains articles entitled Nova Laser Experiments and Stockpile Stewardship; Sharing the Challenges of Non- proliferation; and Taming Explosives for Training.

  10. cks154.tmp

    Office of Scientific and Technical Information (OSTI)

    These experiments were per- formed using the Nova laser. Measurements of the time-evolution of the mixing region were reported previously. We compared the experimental...

  11. TITLE AUTHORS SUBJECT SUBJECT RELATED DESCRIPTION PUBLISHER AVAILABILI...

    Office of Scientific and Technical Information (OSTI)

    These experiments were performed using the Nova laser Measurements of the time evolution of the mixing region were reported previously We compared the experimental...

  12. "Title","Creator/Author","Publication Date","OSTI Identifier...

    Office of Scientific and Technical Information (OSTI)

    These experiments were performed using the Nova laser. Measurements of the time-evolution of the mixing region were reported previously. We compared the experimental...

  13. perturbation Peyser, T.A.; Murray, S.D.; Farley, D.R.; Logory...

    Office of Scientific and Technical Information (OSTI)

    These experiments were performed using the Nova laser. Measurements of the time-evolution of the mixing region were reported previously. We compared the experimental...

  14. Discovery of a Supernova Explosion at Half the Age of the Universe and its Cosmological Implications

    E-Print Network [OSTI]

    Perlmutter, S.

    2010-01-01

    and Bounds on qo. in Thermonuclear Supernovae (eds P. Ruiz-novae as clocks. in Thermonuclear Supernovae (eds P. Ruiz-distance indicators. in Thermonuclear Supernovae (eds P.

  15. universitaris de l'mbit de la

    E-Print Network [OSTI]

    Verschure, Paul

    tecnologies de la informació de la UPF. Amb una combinació harmònica d'espais reha- bilitats i d'obra nova

  16. CCD Observing Manual 49 Bay State Road

    E-Print Network [OSTI]

    Zallen, Richard

    Stars 5.6. Supernovae/Novae Patrols 5.7. Designing Your Own: Using AAVSO VSX 6.0 Observing Techniques 6

  17. DOE/EA-1570: Final Environmental Assessment for Construction...

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

    yd yard(s) (DOEEA-1570) NOvA Environmental Assessment June 2008 xvi DEFINITION OF TERMS Accelerator. A device that accelerates charged particles (such as electrons, protons,...

  18. Acquisition and Project Management Awards Presentations - Ingrid...

    Office of Environmental Management (EM)

    (e) Appearance (NOvA) Procurement Executive Award Office of Science Source Selection Evaluation Team (SSET) Federal Project Director of the Year Pepin Carolan Workshop 2015 -...

  19. Visualizing lateral anisotropy in modern carbonates

    E-Print Network [OSTI]

    Purkis, Sam

    ; purkis@nova.edu Sam Purkis' research interests are in applied sedimentology, petroleum geology sedimentology concepts to improve geostatistical reservoir models. Vlaswinkel's experience includes seismic

  20. UM SMARTPHONE At agora, as tecnologias de

    E-Print Network [OSTI]

    Instituto de Sistemas e Robotica

    UM SMARTPHONE PARA CEGOS Até agora, as tecnologias de telemóvel disponíveis para os invisuais Instituto de Tecnologia de Rochester, em Nova lorque. #12;

  1. An Update on the Brazil Tech Center | GE Global Research

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

    cobrindo biocombustveis, sistemas inteligentes, integrao de sistemas e tecnologias submarinas. Continue verificando nosso site por novos posts e novas posies de...

  2. The long-term spectroscopic misadventures of AG Dra with a nod toward V407 Cyg: Degenerates behaving badly

    E-Print Network [OSTI]

    Shore, S N; Wahlgren, G M

    2011-01-01

    We present some results of an ongoing study of the long-term spectroscopic variations of AG Dra, a prototypical eruptive symbiotic system. We discuss the effects of the environment and orbital modulation in this system and some of the physical processes revealed by a comparison with the nova outburst of the symbiotic-like recurrent nova V407 Cyg 2010.

  3. E ect of Plasma Rotation on Sawtooth Stabilization by Beam N. N. Gorelenkov 1 , M. F. F. Nave 2 , R. Budny 1 , C. Z. Cheng 1

    E-Print Network [OSTI]

    ) and #28;nite Larmor radius (FLR) e#27;ects ÆW kh = (2#25;) 2 e #11; c Z dP ' d#22;dE#28; b X m;m 0 ;l X #3 was modeled using the NOVA-K code[3], which is also benchmarked with the nonperturbative version of NOVA[4

  4. Submitted on February 16, 2007. Accepted on May 8, 2007. Universidade Federal do Rio de Janeiro, CCS, IB, Departamento de Zoologia. Ilha do Fundo, 21940-590, Rio de Janeiro, RJ, Brasil

    E-Print Network [OSTI]

    Paiva, Paulo Cesar de

    , CCS, IB, Departamento de Zoologia. Ilha do Fundão, 21940-590, Rio de Janeiro, RJ, Brasil 3 E, 1825 (Annelida, Polychaeta) do Atol das Rocas, Brasil, com a descrição de uma nova espécie. Três Grande do Norte (RN), Brasil (3o 51'30"S e 33o 49'29"W). Dentre estas, uma nova espécie: Bispira klautae

  5. Inertial confinement fusion quarterly report, October-December 1996

    SciTech Connect (OSTI)

    Hammer, J.

    1997-01-01

    The articles in this issue report progress on: Supernova Hydrodynamics Experiments on the Nova Laser; Characterization of Laser-Driven Shock Waves Using Interferometry; Absolute Equation of State Measurements of Compressed Liquid Deuterium Using Nova; Low-Density-Foam Shells; Tetrahedral Hohlraums; The Rosseland Mean Opacity of a Composite Material at High Temperatures.

  6. The Climate Change Action Pack An interactive teaching supplement designed to

    E-Print Network [OSTI]

    Gunawardena, Arunika

    #12;The Climate Change Action Pack An interactive teaching supplement designed to: · Increase the understanding among young Nova Scotians and educators of the science and issues of climate change · Equip Nova at home and in their future workplaces. #12;Climate Change Action Pack printed Mar. 2002 TABLE OF CONTENTS

  7. Tiragem: 34943 Pas: Portugal

    E-Print Network [OSTI]

    Instituto de Sistemas e Robotica

    Universidadesacusamfaltadeumapolíticanacionalparaousodasnovastecnologiasnosuperior Um relatório europeu sobre o uso de novas tecnologias no ensino superior deixou Portugal de fora. O documento subli- nha ainda a mais-valia da integração destas tecnologias nas estratégias de projectos específicos para o e-learning e o uso das novas tecnologias está presente nos planos estratégicos

  8. Tiragem: 13100 Pas: Portugal

    E-Print Network [OSTI]

    Instituto de Sistemas e Robotica

    outros meios académicos". "O setor público devia ser o motor da introdução das novas tecnologias e da modernização" Questionado sobre qual o fu- turo da tecnologia e, particu- larmente, da robótica aplicada à sempre há capa- cidade financeira para absorver as novas tecnologias, mas que, "apesar de tudo, os robots

  9. DOE/EA-1570 ENVIRONMENTAL

    E-Print Network [OSTI]

    Quigg, Chris

    DOE/EA-1570 FINAL ENVIRONMENTAL ASSESSMENT Environmental Assessment for Construction and Operation. Paul District St. Paul, MN June 2008 #12;(DOE/EA-1570) NOvA Environmental Assessment June 2008ii/EA-1570) NOvA Environmental Assessment June 2008iii SUMMARY Introduction. This Environmental Assessment

  10. Fusion and Plasma Physics are at the Core of Nature's Most Powerful Self-Driven Systems

    E-Print Network [OSTI]

    · Duty Cycle/Repetition Rate The Grand Challenge, Science and Technology for Fusion Blanket Key polarized nuclei others? Spherical Inertial gravitational transient compression drive (laser-D/I, beam-D DIII-D JET FT ITER Ignitor, CIT, FIRE TFTR OmegaU direct drive Nova indirect drive Nova direct drive

  11. Fusion and Plasma Physics are at the Core of Nature's Most Powerful Self-Driven Systems

    E-Print Network [OSTI]

    Gain (Qp) · Fusion Energy Density · Duty Cycle/Repetition Rate The Grand Challenge, Science compression drive (laser-D/I, beam) radial profile time profile electrostatic #12;Plasma Requirements drive Nova indirect drive Nova direct drive Laser D-T #12;Comparison of Typical Plasma Parameters

  12. Short Communication First detection of Nosema ceranae, a microsporidian parasite

    E-Print Network [OSTI]

    Shutler, Dave

    from Canada (two each from Nova Sco- tia, New Brunswick, and Prince Edward Island) and two from USA Canadian Maritime Provinces (New Brunswick in September 2006, 3 beekeepers and 9 colonies; Prince Edward., 2003). Ratios of Nosema-positive hives in Minnesota, New Brunswick, Prince Edward Island, and Nova

  13. An Aerosol Condensation Model for Sulfur Trioxide

    SciTech Connect (OSTI)

    Grant, K E

    2008-02-07

    This document describes a model for condensation of sulfuric acid aerosol given an initial concentration and/or source of gaseous sulfur trioxide (e.g. fuming from oleum). The model includes the thermochemical effects on aerosol condensation and air parcel buoyancy. Condensation is assumed to occur heterogeneously onto a preexisting background aerosol distribution. The model development is both a revisiting of research initially presented at the Fall 2001 American Geophysical Union Meeting [1] and a further extension to provide new capabilities for current atmospheric dispersion modeling efforts [2]. Sulfuric acid is one of the most widely used of all industrial chemicals. In 1992, world consumption of sulfuric acid was 145 million metric tons, with 42.4 Mt (mega-tons) consumed in the United States [10]. In 2001, of 37.5 Mt consumed in the U.S., 74% went into producing phosphate fertilizers [11]. Another significant use is in mining industries. Lawuyi and Fingas [7] estimate that, in 1996, 68% of use was for fertilizers and 5.8% was for mining. They note that H{sub 2}SO{sub 4} use has been and should continue to be very stable. In the United States, the elimination of MTBE (methyl tertiary-butyl ether) and the use of ethanol for gasoline production are further increasing the demand for petroleum alkylate. Alkylate producers have a choice of either a hydrofluoric acid or sulfuric acid process. Both processes are widely used today. Concerns, however, over the safety or potential regulation of hydrofluoric acid are likely to result in most of the growth being for the sulfuric acid process, further increasing demand [11]. The implication of sulfuric acid being a pervasive industrial chemical is that transport is also pervasive. Often, this is in the form of oleum tankers, having around 30% free sulfur trioxide. Although sulfuric acid itself is not a volatile substance, fuming sulfuric acid (referred to as oleum) is [7], the volatile product being sulfur trioxide. Sulfate aerosols and mist may form in the atmosphere on tank rupture. From chemical spill data from 1990-1996, Lawuyi02 and Fingas [7] prioritize sulfuric acid as sixth most serious. During this period, they note 155 spills totaling 13 Mt, out of a supply volume of 3700 Mt. Lawuyi and Fingas [7] summarize information on three major sulfuric acid spills. On 12 February 1984, 93 tons of sulfuric acid were spilled when 14 railroad cars derailed near MacTier, Parry Sound, Ontario. On 13 December 1978, 51 railroad cars derailed near Springhill, Nova Scotia. One car, containing 93% sulfuric acid, ruptured, spilling nearly its entire contents. In July 1993, 20 to 50 tons of fuming sulfuric acid spilled at the General Chemical Corp. plant in Richmond, California, a major industrial center near San Francisco. The release occurred when oleum was being loaded into a nonfuming acid railroad tank car that contained only a rupture disk as a safety device. The tank car was overheated and this rupture disk blew. The resulting cloud of sulfuric acid drifted northeast with prevailing winds over a number of populated areas. More than 3,000 people subsequently sought medical attention for burning eyes, coughing, headaches, and nausea. Almost all were treated and released on the day of the spill. By the day after the release, another 5,000 people had sought medical attention. The spill forced the closure of five freeways in the region as well as some Bay Area Rapid Transit System stations. Apart from corrosive toxicity, there is the additional hazard that the reactions of sulfur trioxide and sulfuric acid vapors with water are extremely exothermic [10, 11]. While the vapors are intrinsically denser than air, there is thus the likelihood of strong, warming-induced buoyancy from reactions with ambient water vapor, water-containing aerosol droplets, and wet environmental surface. Nordin [12] relates just such an occurrence following the Richmond, CA spill, with the plume observed to rise to 300 m. For all practical purposes, sulfur trioxide was the constituent released from the heated tank

  14. Sources and levels of ambient ocean sound near the antarctic peninsula

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

    Dziak, Robert P.; Bohnenstiehl, DelWayne R.; Stafford, Kathleen M.; Matsumoto, Haruyoshi; Park, Minkyu; Lee, Won Sang; Fowler, Matt J.; Lau, Tai-Kwan; Haxel, Joseph H.; Mellinger, David K.; et al

    2015-04-14

    Arrays of hydrophones were deployed within the Bransfield Strait and Scotia Sea (Antarctic Peninsula region) from 2005 to 2009 to record ambient ocean sound at frequencies of up to 125 and 500 Hz. Icequakes, which are broadband, short duration signals derived from fracturing of large free-floating icebergs, are a prominent feature of the ocean soundscape. Icequake activity peaks during austral summer and is minimum during winter, likely following freeze-thaw cycles. Iceberg grounding and rapid disintegration also releases significant acoustic energy, equivalent to large-scale geophysical events. Overall ambient sound levels can be as much as ~10–20 dB higher in the open,more »deep ocean of the Scotia Sea compared to the relatively shallow Bransfield Strait. Noise levels become lowest during the austral winter, as sea-ice cover suppresses wind and wave noise. Ambient noise levels are highest during austral spring and summer, as surface noise, ice cracking and biological activity intensifies. Vocalizations of blue (Balaenoptera musculus) and fin (B. physalus) whales also dominate the long-term spectra records in the 15–28 and 89 Hz bands. Blue whale call energy is a maximum during austral summer-fall in the Drake Passage and Bransfield Strait when ambient noise levels are a maximum and sea-ice cover is a minimum. Fin whale vocalizations were also most common during austral summer-early fall months in both the Bransfield Strait and Scotia Sea. The hydrophone data overall do not show sustained anthropogenic sources (ships and airguns), likely due to low coastal traffic and the typically rough weather and sea conditions of the Southern Ocean.« less

  15. Sources and levels of ambient ocean sound near the antarctic peninsula

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

    Dziak, Robert P. [Oregon State Univ./Cooperative Inst. for Marine Resources Studies/National Oceanic and Atmospheric Administration (NOAA)/Pacific Marine Environmental Lab., Newport, OR (United States); Bohnenstiehl, DelWayne R. [North Carolina State Univ., Raleigh, NC (United States). Dept. of Marine, Earth, and Atmospheric Sciences.; Stafford, Kathleen M. [Univ. of Washington, Seattle, WA (United States). Applied Physics Lab.; Matsumoto, Haruyoshi [Oregon State Univ./Cooperative Inst. for Marine Resources Studies/National Oceanic and Atmospheric Administration (NOAA)/Pacific Marine Environmental Lab., Newport, OR (United States); Park, Minkyu [Korea Polar Research Inst., Incheon (Korea, Republic of). Polar Environmental Research Div.; Lee, Won Sang [Korea Polar Research Inst., Incheon (Korea, Republic of). Polar Environmental Research Div.; Fowler, Matt J. [Oregon State Univ./Cooperative Inst. for Marine Resources Studies/National Oceanic and Atmospheric Administration (NOAA)/Pacific Marine Environmental Lab., Newport, OR (United States); Lau, Tai-Kwan [Oregon State Univ./Cooperative Inst. for Marine Resources Studies/National Oceanic and Atmospheric Administration (NOAA)/Pacific Marine Environmental Lab., Newport, OR (United States); Haxel, Joseph H. [Oregon State Univ./Cooperative Inst. for Marine Resources Studies/National Oceanic and Atmospheric Administration (NOAA)/Pacific Marine Environmental Lab., Newport, OR (United States); Mellinger, David K. [Oregon State Univ./Cooperative Inst. for Marine Resources Studies/National Oceanic and Atmospheric Administration (NOAA)/Pacific Marine Environmental Lab., Newport, OR (United States); Fine, Michael L [Virginia Commonwealth Univ., Richmond, VA (United States)

    2015-04-14

    Arrays of hydrophones were deployed within the Bransfield Strait and Scotia Sea (Antarctic Peninsula region) from 2005 to 2009 to record ambient ocean sound at frequencies of up to 125 and 500 Hz. Icequakes, which are broadband, short duration signals derived from fracturing of large free-floating icebergs, are a prominent feature of the ocean soundscape. Icequake activity peaks during austral summer and is minimum during winter, likely following freeze-thaw cycles. Iceberg grounding and rapid disintegration also releases significant acoustic energy, equivalent to large-scale geophysical events. Overall ambient sound levels can be as much as ~10–20 dB higher in the open, deep ocean of the Scotia Sea compared to the relatively shallow Bransfield Strait. Noise levels become lowest during the austral winter, as sea-ice cover suppresses wind and wave noise. Ambient noise levels are highest during austral spring and summer, as surface noise, ice cracking and biological activity intensifies. Vocalizations of blue (Balaenoptera musculus) and fin (B. physalus) whales also dominate the long-term spectra records in the 15–28 and 89 Hz bands. Blue whale call energy is a maximum during austral summer-fall in the Drake Passage and Bransfield Strait when ambient noise levels are a maximum and sea-ice cover is a minimum. Fin whale vocalizations were also most common during austral summer-early fall months in both the Bransfield Strait and Scotia Sea. The hydrophone data overall do not show sustained anthropogenic sources (ships and airguns), likely due to low coastal traffic and the typically rough weather and sea conditions of the Southern Ocean.

  16. The Value of a dynamic Environmental Building Certification 

    E-Print Network [OSTI]

    Sutton, H. M.

    2013-01-01

    ,000 ?17,500 2007 2008 2009 2010 2011 2012 k W h ' s Scotia?Centre Annual?Consumption Baseline?kWh BOMA BESt ? a dynamic certification program (ICEBO 2013) BOMA BESt CASE STUDY: WASTE DIVERSION & SITE 0.00 50.00 100.00 150.00 200.00 250...?for?continuous?improvement What makes it dynamic anyway? BOMA BESt ? a dynamic certification program (ICEBO 2013) ABOUT BOMA BESt ? Program Description Building?Environmental?Standards?(BESt) ? Environmental?performance?and? management?practices?of?existing? buildings...

  17. Antarctic microbial interactions using phytoplankton extracellular metabolites 

    E-Print Network [OSTI]

    Warner, Robert Andrew

    1980-01-01

    ). During austral summer, correlations were glycolate uptake : photosynthesis at 0. 64 (5Z significance level); glycolate uptake : viable bacteria at 0. 61 (5E significance level); glucose uptake : viable bacteria at 0. 73 (5%%d significance level... 0 oo 3W 32 60 SCOTIA 5 oo oo SEA l3 24 28 /z WEDDELL SEA 75' 73' "0 45' 30' 15 W 0 73. g 6 ~ Cruise tract of the Is las Qrcacias 17. area, thus a median between significant amounts of incorporation to be measured and errors involved...

  18. R&D Argon Detector at Ash River (RADAR) - Letter of Intent

    E-Print Network [OSTI]

    Adamson, P; Guzowski, P; Habig, A; Holin, A; Huang, J; Kordosky, M; Kreymer, A E; Lang, K; Marshak, M; Mehdiyev, R; Miller, W H; Naples, D; Nichol, R J; Patterson, R B; Sousa, A; Thomas, J; Whitehead, L H

    2013-01-01

    The RADAR project proposes to deploy a 6 kton liquid argon TPC at the NOvA Far Detector building in Ash River, Minnesota, and expose it to the NuMI beam during NOvA running. It will significantly add to the physics capabilities of the NOvA program while providing LBNE with an R&D program based on full-scale TPC module assemblies. RADAR offers an excellent opportunity to improve the full Homestake LBNE project in physics reach, timeline, costs, and fostering international partnership. The anticipated duration of the project's construction is 5 years, with running happening between 2018 and 2023.

  19. Controlled environments : the case of Rio de Janeiro

    E-Print Network [OSTI]

    Ribeiro, Roberto Scipiao

    1990-01-01

    This study describes and analyzes the changing impact of "security" on the form of cities by exploring two residential settings, Nova Ipanema and Novo Leblon, in the city of Rio de Janeiro, Brazil. These developments have ...

  20. Alternatives to Hibernation

    E-Print Network [OSTI]

    T. Naylor

    2002-08-16

    I outline the evidence pertinent to the connection between the nova explosion and mass transfer rates in CVs. I conclude that there is still insufficient evidence to decide whether or not such a connection exists.

  1. CX-010571: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    eNova, Incorporated - Waste Heat Powered Gas Compressor CX(s) Applied: B3.6 Date: 04/15/2013 Location(s): New Mexico, Texas, Texas Offices(s): Advanced Research Projects Agency-Energy

  2. Lithium Research Status and PlansLithium Research Status and Plans Charles H. Skinner, PPPL

    E-Print Network [OSTI]

    Princeton Plasma Physics Laboratory

    Sch Mines Columbia U CompX General Atomics INL Johns Hopkins U LANL LLNL Lodestar MIT Nova Photonics) · Modification of edge profiles and elimination of ELMs (BP TSG) · ELM pacing to control radiated power rise (ASC

  3. Astrophysics in 2006

    E-Print Network [OSTI]

    Trimble, V; Trimble, V; Aschwanden, MJ; Hansen, CJ

    2007-01-01

    Clusters of galaxies · Gamma-ray bursts · Milky Way · EarthX-ray features from gamma ray bursts that once indicated 10feel that super- novae, gamma ray bursts, flares of active

  4. Determining the jet opening-angle of gamma-ray bursts

    E-Print Network [OSTI]

    McEvoy, Erica Lynn, 1981-

    2004-01-01

    There is growing scientific agreement that at least some cosmic gamma-ray bursts (GRBs) coincide with the deaths of rapidly rotating massive stars - dubbed "hyper-novae." In 1987, a supernova (SN 1987A) was detected in the ...

  5. Studies of the structure of the Tz = -1 Nuclei 20Na and 30S for explosive astrophysics 

    E-Print Network [OSTI]

    Wallace, Jennifer Patrita

    2013-11-28

    In explosive astrophysical environments such as novae, X-ray bursters and supernovae, conditions of extreme temperature and density are achieved. Under such conditions, both the rate of energy release and path of ...

  6. VI-13 INSTITUTE COLLOQUIA AND SEMINARS

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

    2-March 31, 2013 2012 April 24 Dr. Antti Saastamoninen, University of Jyvaskyla and Cyclotron Institute, Texas A&M University, College Station, Texas Beta-Decay Studies for Nova...

  7. NERSC Releases Mobile Apps to Users

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

    (MOTD), as well as log into their account to view recently completed, queued and running jobs, on their mobile phones. The NOVA portal (https:portal-auth.nersc.govnova) is an...

  8. Catlogo PEACs 2011 Projetos de Extenso

    E-Print Network [OSTI]

    Maier, Rudolf Richard

    Determinantes Sociais de Saúde em Adolescentes da Região Administrativa de Itapoã - DF Aprendizagem Baseada em Problemas e Projetos Associados ao E-Learning: Pesquisa e Aplicações de novas Metodologias Educacionais

  9. Optimal Implementation of On-Line Optimization Xueyu Chen and Ralph W. Pike

    E-Print Network [OSTI]

    Pike, Ralph W.

    Penex Phillips Borealis AB Marathon DSM-Hydrocarbons Chevron Pyrotec/KTI NOVA Chemicals (Canada) British Petroleum Applications mainly crude units in refineries and ethylene plants #12;6 Companies Providing On

  10. Big Data around UW-Madison Brian S. Yandell,UW-Madison

    E-Print Network [OSTI]

    Yandell, Brian S.

    (1995 Silicon Snake Oil) PBS NOVA (1990) "The KGB, the Computer, and Me" #12;What is (are) big data and networks · Spatial/temporal ­ images at all scales, static and dynamic ­ geospatial alliance, biomedical

  11. Fermilab Today

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

    of muon neutrinos into electron neutrinos. Pictured here is the NOvA Far Detector in Ash River, Minnesota. Photo: Reidar Hahn The Nobel Prize-winning discovery of neutrino...

  12. Stellar reaction rate for (22)Mg + p -> (23)Al from the asymptotic normalization coefficient in the mirror nuclear system (22)Ne + n -> (23)Ne 

    E-Print Network [OSTI]

    Al-Abdullah, T.; Carstoiu, F.; Chen, X.; Clark, H. L.; Fu, C.; Gagliardi, Carl A.; Lui, Y. -W; Mukhamedzhanov, A.; Tabacaru, G.; Tokimoto, Y.; Trache, L.; Tribble, Robert E.

    2010-01-01

    The production of (22)Na in ONe novae can be influenced by the (22)Mg(p,gamma)(23)Al reaction. To investigate this reaction rate at stellar energies, we have determined the asymptotic normalization coefficient (ANC) for ...

  13. XXIV Congresso Brasileiro de Biblioteconomia, Documentao e Cincia da Informao

    E-Print Network [OSTI]

    Paraná, Universidade Federal do

    com ao advento da internet e das novas tecnologias, muitas formas de prestar serviço na biblioteca tem. A biblioteca universitária tem a finalidade de dar suporte informacional à comunidade a qual está inserida

  14. Regimento do CED TITULO 1-Disposies Iniciais

    E-Print Network [OSTI]

    Floeter, Sergio Ricardo

    Novas Tecnologias no Ensino e na Pesquisa em Educação e Informação (integradora dos Laboratórios de Pesquisa e Produção de tecnologias) g) Biblioteca Setorial "Maria Terezinha Neves Freitas" h) Núcleo de

  15. Especialistas em aprendizagem automtica reencontram-se no IST

    E-Print Network [OSTI]

    Instituto de Sistemas e Robotica

    demonstrações de novas tecnologias nesta área, quer portuguesas quer internacionais. Investigadores, empresas e Portugal, da Fundação para a Ciência e a Tecnologia (FCT), bem como de parceiros empresariais como a Google

  16. EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH CERNPHEP/2007039

    E-Print Network [OSTI]

    CERN

    . Sachs, A. Straessner, D. Strom, R. Tenchini, F. Teubert, M.A. Thomson, S. Todorova­Nova, A. Valassi, A measurements, reported in the last column of Table 2. The measurements obtained at the Z pole by the LEP

  17. Experimental and Modelling Study of the Effect of Diffusional...

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

    vs. monolith) deer12nova.pdf More Documents & Publications Progress on Acidic Zirconia Mixed Oxides for Efficient NH3-SCR Catalysis Lean NOx Reduction with Dual Layer LNT...

  18. Outstanding problems in nuclear astrophysics: recent progress at TRIUMF

    SciTech Connect (OSTI)

    Davids, B., E-mail: davids@triumf.ca [TRIUMF, 4004 Wesbrook Mall, Vancouver, BC (Canada)

    2014-04-15

    Recent experimental and theoretical efforts at TRIUMF on nuclear reactions relevant to big bang nucleosynthesis, quiescent stellar fusion, classical novae, and Type I X-ray bursts are described.

  19. c-Ray lenses taking a deeper look at sites of nucleosynthesis Cornelia B. Wunderer

    E-Print Network [OSTI]

    California at Berkeley, University of

    c-Ray lenses ­ taking a deeper look at sites of nucleosynthesis Cornelia B. Wunderer Space Sciences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 617 5. Using lenses to study nucleosynthesis of nucleosynthesis, namely massive stars, novae, and superno

  20. Choreographing American Citizenship in the Age of the Improvised Explosive Device

    E-Print Network [OSTI]

    Wolf, Sara

    2013-01-01

    performers. DVD. Rise of the Drones. NOVA/PBS. 2012. Thrash:Shanker. “War Evolves With Drones, Some Tiny as Bugs. ” TheHas Cautionary Tales About Drones. ” National Public Radio,

  1. Cataclysmic Variables

    E-Print Network [OSTI]

    Robert Connon Smith

    2007-01-23

    Cataclysmic variables are binary stars in which a relatively normal star is transferring mass to its compact companion. This interaction gives rise to a rich range of behaviour, of which the most noticeable are the outbursts that give the class its name. Novae belong to the class, as do the less well known dwarf novae and magnetic systems. Novae draw their energy from nuclear reactions, while dwarf novae rely on gravity to power their smaller eruptions. All the different classes of cataclysmic variable can be accommodated within a single framework and this article will describe the framework, review the properties of the main types of system and discuss models of the outbursts and of the long-term evolution.

  2. Beta-Delayed Proton Decay of C-9 

    E-Print Network [OSTI]

    Esterl, J. E.; Allred, D.; Cerny, J.; Sextro, R. G.; Hardy, John C.

    1972-01-01

    &M University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Chair of Committee, Markus J. Peterson Committee Members, Nova J. Silvy William E. Grant Fred E. Smeins Head of Department, Michael P. Masser May... DEDICATION For all my family, back to the beginning. For Texas, her lands and people. Díky Boh? za zem? zaslíbené—Texas. v ACKNOWLEDGEMENTS I would like to thank my committee chair, Dr. Markus J. Peterson, and my committee members Drs. Nova J...

  3. Inertial confinement fusion quarterly report, January--March 1993. Volume 3, No. 2

    SciTech Connect (OSTI)

    Amendt, P.A. [ed.

    1993-09-01

    This report discusses the following topics: High Fluence Third Harmonic Generation; Ultraviolet Induced Transient Absorption in KDP and Its Influence on Fourth Harmonic Frequency Conversion; Relativistic Semiclassical Atomic Transition Rates; Verification of OPAL Opacity Code Predictions for Conditions of Astrophysical Interest; Solid Hydrogen Surfaces; Large Aperture Sol-Gel Random Phase Plates for Beam Smoothing on Nova; and Neutron Time-of-Flight Ion Temperature Diagnostic for Nova.

  4. Numerical solutions of magnetohydrodynamic stability of axisymmetric toroidal plasmas using cubic B-spline finite element method

    SciTech Connect (OSTI)

    Cheng, C.Z.

    1988-12-01

    A nonvariational ideal MHD stability code (NOVA) has been developed. In a general flux coordinate (/psi/, theta, /zeta/) system with an arbitrary Jacobian, the NOVA code employs Fourier expansions in the generalized poloidal angle theta and generalized toroidal angle /zeta/ directions, and cubic-B spline finite elements in the radial /psi/ direction. Extensive comparisons with these variational ideal MHD codes show that the NOVA code converges faster and gives more accurate results. An extended version of NOVA is developed to integrate non-Hermitian eigenmode equations due to energetic particles. The set of non-Hermitian integro-differential eigenmode equations is numerically solved by the NOVA-K code. We have studied the problems of the stabilization of ideal MHD internal kink modes by hot particle pressure and the excitation of ''fishbone'' internal kink modes by resonating with the energetic particle magnetic drift frequency. Comparisons with analytical solutions show that the values of the critical ..beta../sub h/ from the analytical theory can be an order of magnitude different from those computed by the NOVA-K code. 24 refs., 11 figs., 1 tab.

  5. Inertial confinement fusion. ICF quarterly report, October 1993--December 1993, Volume 4, Number 1

    SciTech Connect (OSTI)

    Powell, H.T.; Schleich, D.P.; Murphy, P.W. [eds.

    1994-05-01

    In the 1990 National Academy of Sciences (NAS) report of its review of the U.S. Inertial Confinement Fusion (ICF) Program, it was recommended that a high priority be placed on completing the Precision Nova Project and its associated experimental campaign. Since fiscal year 1990, the lab has therefore campaigned vigorously on Nova and in its supporting laboratories to develop the Precision Nova capabilities needed to perform the stressful target experiments recommended in the 1990 NAS report. The activities to enable these experiments have been directed at improvements in three areas - the Nova laser, target fabrication capabilities, and target diagnostics. As summarized in the five articles in this report, the Precision Nova improvements have been successfully completed. These improvements have had a positive impact on target performance and on the ability to diagnose the results, as evidenced by the HEP-1 experimental results. The five articles generally concentrate on improvements to the capabilities rather than on the associated target physics experiments. Separate abstracts are included for each paper.

  6. Composite polymer: Glass edge cladding for laser disks

    DOE Patents [OSTI]

    Powell, H.T.; Wolfe, C.A.; Campbell, J.H.; Murray, J.E.; Riley, M.O.; Lyon, R.E.; Jessop, E.S.

    1987-11-02

    Large neodymium glass laser disks for disk amplifiers such as those used in the Nova laser require an edge cladding which absorbs at 1 micrometer. This cladding prevents edge reflections from causing parasitic oscillations which would otherwise deplete the gain. Nova now utilizes volume-absorbing monolithic-glass claddings which are fused at high temperature to the disks. These perform quite well but are expensive to produce. Absorbing glass strips are adhesively bonded to the edges of polygonal disks using a bonding agent whose index of refraction matches that of both the laser and absorbing glass. Optical finishing occurs after the strips are attached. Laser disks constructed with such claddings have shown identical gain performance to the previous Nova disks and have been tested for hundreds of shots without significant degradation. 18 figs.

  7. Composite polymer-glass edge cladding for laser disks

    DOE Patents [OSTI]

    Powell, Howard T. (Livermore, CA); Riley, Michael O. (San Ramon, CA); Wolfe, Charles R. (Palo Alto, CA); Lyon, Richard E. (Livermore, CA); Campbell, John H. (Livermore, CA); Jessop, Edward S. (Tracy, CA); Murray, James E. (Livermore, CA)

    1989-01-01

    Large neodymium glass laser disks for disk amplifiers such as those used in the Nova laser require an edge cladding which absorbs at 1 micrometer. This cladding prevents edge reflections from causing parasitic oscillations which would otherwise deplete the gain. Nova now utilizes volume-absorbing monolithic-glass claddings which are fused at high temperature to the disks. These perform quite well but are expensive to produce. Absorbing glass strips are adhesively bonded to the edges of polygonal disks using a bonding agent whose index of refraction matches that of both the laser and absorbing glass. Optical finishing occurs after the strips are attached. Laser disks constructed with such claddings have shown identical gain performance to the previous Nova disks and have been tested for hundreds of shots without significant degradation.

  8. R&D Argon Detector at Ash River (RADAR) - Letter of Intent

    E-Print Network [OSTI]

    P. Adamson; S. Agarwalla; A. Aurisano; J. J. Evans; P. Guzowski; A. Habig; A. Holin; J. Huang; M. Kordosky; A. E. Kreymer; K. Lang; M. Marshak; R. Mehdiyev; W. H. Miller; D. Naples; R. J. Nichol; V. Paolone; R. B. Patterson; A. Sousa; J. Thomas; L. H. Whitehead

    2013-09-28

    In the RADAR project described in this Letter of Intent, we propose to deploy a 6 kton liquid argon TPC at the NOvA Far Detector building in Ash River, Minnesota, and expose it to the NuMI beam during NOvA running. It will significantly add to the physics capabilities of the NOvA program while providing LBNE with an R&D program based on full-scale TPC module assemblies. RADAR offers an excellent opportunity to improve the full Homestake LBNE project in physics reach, timeline, costs, and fostering international partnership. The anticipated duration of the project's construction is 5 years, with running happening between 2018 and 2023.

  9. Data Quality Assurance and Performance Measurement of Data Mining for Preventive Maintenance of Power Grid

    E-Print Network [OSTI]

    Rudin, Cynthia

    Ensuring reliability as the electrical grid morphs into the "smart grid" will require innovations in how we version of NOVA has been deployed for the power grid in New York City, and it is able to eval- uate- able and intelligent electricity distribution and transmission system, i.e., power grid. The smart grid

  10. Preparing for the peak: Energy security and Atlantic Canada

    E-Print Network [OSTI]

    Hughes, Larry

    ­ Hydroelectricity­ Uranium­ Canada is not "energy homogenous"· #12;Atlantic Canada Older housing stock· Declining:· Hibernia, Terra Nova, and­ White Rose >85% exported­ Hebron?­ Hydroelectric:· Churchill Falls 5,400 MW Statistics Canada #12;New Brunswick Limited coal reserves· Electricity:· Oil and coal­ Hydroelectric­ Nuclear

  11. Ann. Geophysicae 14, 1088--1094 (1996) EGS --Springer-Verlag 1996 Thermal, pressure and wind fields at ground level in the area

    E-Print Network [OSTI]

    Boyer, Edmond

    1996-01-01

    is of particular importance, as considerable energy exchanges take place between ocean and atmosphere. Mesoscale to Terra Nova Bay, the formation of mesoscale vortices is very frequent. Model studies have shown- ity have been simulated by mesoscale models (Galle´ e and Schayes, 1994; Galle´ e, 1995). It has been

  12. Draft version March 12, 2007 Preprint typeset using LATEX style emulateapj v. 03/07/07

    E-Print Network [OSTI]

    Ness, Jan-Uwe

    of the accreted envelope exceeds a certain value, a thermonuclear runaway results. Enough energy is deposited-ray emission starts soon after out- burst when the expanding nova envelope is still small and dense. The energy a hard, sub-Eddington luminosity, X-ray spectral energy distribution (e.g., V382 Vel, Orio et al. 2001a

  13. Draft version March 12, 2007 Preprint typeset using L A T E X style emulateapj v. 03/07/07

    E-Print Network [OSTI]

    Ness, Jan-Uwe

    of the accreted envelope exceeds a certain value, a thermonuclear runaway results. Enough energy is deposited­ray emission starts soon after out­ burst when the expanding nova envelope is still small and dense. The energy a hard, sub­Eddington luminosity, X­ray spectral energy distribution (e.g., V382Vel, Orio et al. 2001a

  14. Publisher's Note: Asymptotic normalization coefficients for N-14+p -> O-15 and the astrophysical S factor for N-14(p,gamma)O-15 (vol 67, art no 065804, 2003) 

    E-Print Network [OSTI]

    Mukhamedzhanov, AM; Bem, P.; Brown, BA; Burjan, V.; Gagliardi, Carl A.; Kroha, V.; Novak, J.; Nunes, FM; Piskor, S.; Pirlepesov, F.; Simeckova, E.; Tribble, Robert E.; Vincour, J.

    2003-01-01

    : Asymptotic normalization coefficients for 14N?p\\15O and the astrophysical S factor for 14N?p ,g?15O ?Phys. Rev. C 67, 065804 ?2003?? A. M. Mukhamedzhanov, P. Be?m B. A. Brown, V. Burjan, C. A. Gagliardi, V. Kroha, J. Nova?k, F. M. Nunes, S? . Piskor?, F...

  15. Environment Canada Industrial Programs Section

    E-Print Network [OSTI]

    Management Practices for Process Water Management at Fish Processing Plants in British Columbia h~ Nova This report was funded by Environment Canada under the Fraser River Action Plan through its Fraser Pollution Canada. Any comments regarding this report should be forwarded to: Fraser Pollution Abatement Office

  16. Liverpool Telescope Optical Photometry Following the 2006 Outburst of RS Ophiuchi

    E-Print Network [OSTI]

    M. J. Darnley; R. A. Hounsell; M. F. Bode

    2008-09-26

    We present a preliminary report on the broadband optical photometry of the 2006 outburst of the recurrent nova RS Ophiuchi. These data were obtained using the robotic 2m Liverpool Telescope and cover the outburst from day 27 through day 548.

  17. Laser program annual report, 1979

    SciTech Connect (OSTI)

    Coleman, L.W.; Strack, J.R.

    1980-03-01

    This volume provides a program overview, presenting highlights of the technical accomplishments of the elements of the program, as well as discussions of program resources and facilities. Also covered are the work of the Solid-State Laser program element, which includes systems operations, Nova, and research and development activities. (MOW)

  18. APLICAO DE AGENTES MVEIS EM REDES DE SENSORES SEM FIO PARA LOCALIZAO E SEGUIMENTO DE OBJETOS ALVOS MVEIS

    E-Print Network [OSTI]

    Wagner, Flávio Rech

    , consumo de energia, e etc. Palavras-chave Localização e seguimento, agentes móveis, rede de sensores sem processamento, sensoriamento/detecção e comunicação dentro de um ambiente físico. O nó sensor, uma nova classe ener- gia, porque são usualmente alimentados com baterias ou energia coletada do meio em que se

  19. Named Entity Recognition for Catalan Using Spanish Resources

    E-Print Network [OSTI]

    Samaranch]pER, se reuni6 el lunes en [Nueva Yorkkoc eon investigadores del [FBI]oRG y del [Departamento de dilluns a [Nova York]Loc amb investigadors del [FBI]oRG i del [Departament de Justicia]oRG." Figure 1

  20. Tiragem: 130000 Pas: Portugal

    E-Print Network [OSTI]

    Instituto de Sistemas e Robotica

    Técnico, em Lisboa, que vai liderar um sistema de diagnóstico do meio onde se dá a reação de fusão nuclear a viabilidade científica e tecnológica da energia baseada em fusão nuclear". Na prática, deseja-se "substituir a fonte de calor que existe nos reatores de decisão nuclear ou numa central termoelétrica por uma nova

  1. There is no explosion risk associated with superfluid Helium in the LHC cooling system

    E-Print Network [OSTI]

    Malcolm Fairbairn; Bob McElrath

    2008-09-23

    We evaluate speculation about the possibility of a dangerous release of energy within the liquid Helium of the Large Hadron Collider (LHC) cryogenic system due to the occurrence of a "Bose-Nova". Bose-Novae are radial bursts of rapidly moving atoms which can occur when a Bose-Einstein Condensate (BEC) undergoes a collapse due the interatomic potential being deliberately made attractive using a magnetic field close to the Feshbach resonance. Liquid 4He has a monatomic structure with s-wave electrons, zero nuclear spin, no hyperfine splitting, and as a consequence no Feshbach resonance which would allow one to change its normally repulsive interactions to be attractive. Because of this, a Bose-Nova style collapse of 4He is impossible. Additional speculations concerning cold fusion during these events are easily dismissed using the usual arguments about the Coulomb barrier at low temperatures, and are not needed to explain the Bose-Einstein condensate Bose-Nova phenomenon. We conclude that that there is no physics whatsoever which suggests that Helium could undergo any kind of unforeseen catastrophic explosion.

  2. Thermal Lens Spectroscopy Mladen Franko

    E-Print Network [OSTI]

    Reid, Scott A.

    Thermal Lens Spectroscopy Mladen Franko Laboratory of Environmental Research, University of Nova-beam Instruments 5 3.3 Differential Thermal Lens Instruments 7 3.4 Multiwavelength and Tunable Thermal Lens Spectrometers 8 3.5 Circular Dichroism TLS Instruments 9 3.6 Miniaturization of Thermal Lens Instruments 9 4

  3. Time Series Analysis 1 Time series in astronomy

    E-Print Network [OSTI]

    Babu, G. Jogesh

    (supernovae, gamma-ray bursts) Difficulties in astronomical time series Gapped data streams: Diurnal & monthly phenomena: thermonuclear (novae, X-ray bursts), magnetic reconnection (solar/stellar flares), star death); pulsation (helioseismology, Cepheids) Stochastic phenomena: accretion (CVs, X-ray binaries, Seyfert gals

  4. South Florida Sun-Sentinel.com NSU, FAU among schools selected to research Gulf oil spill

    E-Print Network [OSTI]

    Fernandez, Eduardo

    South Florida Sun-Sentinel.com NSU, FAU among schools selected to research Gulf oil spill By Scott in an effort to research the impact of the BP oil spill on the Gulf of Mexico. Florida Atlantic University. Among the projects selected: ·FIU and Nova will use sharks and scavengers to assess the impact of oil

  5. High-Performance Reactive Fluid Flow Simulations Using Adaptive Mesh Refinement on Thousands of Processors

    E-Print Network [OSTI]

    Rhoads, James

    Thermonuclear Flashes at the University of Chicago. FLASH is a modular, adaptive mesh, parallel simulation code to thermonuclear reactions in supernovae and novae. The FLASH code was designed to study thermonuclear flashes Thermonuclear Flashes, The University of Chicago, Chicago, IL 60637 2 Center for Applied Scientific Computing

  6. Direct Measurements of 22 Mg Resonances and Consequences

    E-Print Network [OSTI]

    Garcia, Alejandro

    that depend on the thermonuclear rate of the 22Naðp; Þ23Mg reaction. We have measured the strengths of low A classical nova is a thermonuclear outburst on the surface of a white-dwarf star that is accreting hydrogen nucleosynthesis because most of the relevant thermonuclear reaction rates are based on experimental information [1

  7. ORIGINAL PAPER Microbial degradation of 7-ketocholesterol

    E-Print Network [OSTI]

    Alvarez, Pedro J.

    ORIGINAL PAPER Microbial degradation of 7-ketocholesterol Jacques Mathieu Æ John Schloendorn Æ of matrices to avoid adverse biological effects, its microbial degradation has not been previously addressed, utilized 7KC as a sole carbon and energy source, resulting in its mineralization. Nocardia nova, which

  8. C o n s i d e r a c i o n s s o b r e l a u r b a n s t i c a e n t e m p s d e g l o b a l i t z a c i

    E-Print Network [OSTI]

    Verschure, Paul

    passat es va percebre que sorgia un nou món caracteritzat per unes noves tecnologies, unes noves Industrial va portar l'apari- ció d'una societat industrial, la nova revolució de les tecnologies de la infor tecnologies ha esdevingut espectacular quan ha incorporat els darrers avenços en el camp de les

  9. Fast 2-D camera control, data acquisition, and database techniques for edge studies on NSTX

    E-Print Network [OSTI]

    Princeton Plasma Physics Laboratory

    Fast 2-D camera control, data acquisition, and database techniques for edge studies on NSTX W Nova Photonics, Princeton, NJ, 08543, USA Abstract Fast 2-D cameras examine a variety of important methods used to organize the fast camera data and to facilitate physics insights from it. An example

  10. Extracting the asymptotic normalization coefficients in neutron transfer reactions to determine the reaction rates for 22Mg(p,gamma)23AL and 17F(p,gamma)18Ne 

    E-Print Network [OSTI]

    Al-Abdullah, Tariq Abdalhamed

    2009-05-15

    , it is naturally essential to make a connection between cosmology and nuclear and particle physics to study the processes of the reactions that occur in stellar evolution systems, such as novae and supernovae, and cause the abundances of more than two thousand...

  11. Computing Environment-Aware Agent Behaviours with Logic Program Updates

    E-Print Network [OSTI]

    Brogi, Antonio

    Brogi2 , Jo~ao A. Leite1 , and Lu´is M. Pereira1 1 Centro de Intelig^encia Artificial, Universidade Nova.g., by receiving a message, by downloading a file, or by getting data from physical sensors). Formally, if we

  12. All Active Equipment Jul 7, 2015, 5:15 AM Name Description Location

    E-Print Network [OSTI]

    Lee, Seung-Wuk

    oxide etch chamber - Ch B 586 cha CHA E-beam Evaporator 582 chp Chemical Hygiene Plan nanolab cmp To Report NanoLab Building Problems nanolab fei-sem FEI Nova NanoSEM650 131 #12;All Active Equipment Jul 7

  13. Proceedings of the LLNL Technical Women`s Symposium

    SciTech Connect (OSTI)

    von Holtz, E. [ed.

    1993-12-31

    This report documents events of the LLNL Technical Women`s Symposium. Topics include; future of computer systems, environmental technology, defense and space, Nova Inertial Confinement Fusion Target Physics, technical communication, tools and techniques for biology in the 1990s, automation and robotics, software applications, materials science, atomic vapor laser isotope separation, technical communication, technology transfer, and professional development workshops.

  14. The Journal on Software and Systems Modeling manuscript No. (will be inserted by the editor)

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    The Journal on Software and Systems Modeling manuscript No. (will be inserted by the editor-INRIA, Nantes, France 2 CITI/DI/FCT, Universidade Nova de Lisboa, Portugal 3 TU Darmstadt, Germany 4 SAP. One of these problems is traceability management. In the European AMPLE project we are creating

  15. UNIVERSIDADE FEDERAL DE SANTA CATARINA CENTRO DE CINCIAS BIOLGICAS

    E-Print Network [OSTI]

    Floeter, Sergio Ricardo

    Ambiente: Biodiversidade; Energia; Atmosfera; Hidrosfera; Gestão, Política e Legislação Ambiental; Ocupação desenvolvimento limpo MDL. 30/08 ­ (LDT): As novas energias no Brasil (prefácio) 06/09 ­ Vídeo: The Corporation 13/09 ­ (LDT): A empresa "verde" no Brasil: mudança ou apropriação ideológica?/ Água virtual (veja site na

  16. SERVIO PBLICO FEDERAL UNIVERSIDADE FEDERAL DE SANTA CATARINA

    E-Print Network [OSTI]

    Hanazaki, Natalia

    .06.2013 1) MURO DE CONTENÇÃO DE ENCOSTA A empresa GEOnumerics foi contratada para elaborar o projeto básico.06.2013, tendo 30 dias para sua conclusão. Após esse período será licitada uma nova empresa que executará a obra solucionar o problema de abastecimento de energia ao prédio novo, tendo em vista a necessidade de se fazer

  17. Canal Superior Online Pas: Portugal

    E-Print Network [OSTI]

    Instituto de Sistemas e Robotica

    -se a promotores que já tenham constituído a empresa ou que pretendam avançar com um negócio na área da energia NOTÍCIAS PROGRAMASDEINFORMAÇÃO REPORTAGEM ÚLTIMAS 1,5 MILHÕES DE EUROS PARA PROJETOS NA ÁREA DA ENERGIA Online 1,5 MILHÕES DE EUROS PARA PROJETOS NA ÁREA DA ENERGIA A Fundação Repsol lança uma nova edição do

  18. Einstein apaixonado: A cincia mal-contada de um mito bem-traado Carlos Alberto dos Santos

    E-Print Network [OSTI]

    dos Santos, C.A.

    . (...) A luz de junho explode através das janelas que dão para a Unionstrasse, no coração do lendário e "a nova teoria das ondas de luz de James Clerk Maxwell" e a controvérsia em torno da natureza da luz fazer com que os raios catódicos, isto é, os elétrons, fossem emitidos de um metal expondo-o à luz

  19. plurianuais universidades

    E-Print Network [OSTI]

    Instituto de Sistemas e Robotica

    forma que reclamam "uma adequada política de atribuição de bolsas", por en- tenderem que a atual lei redução de custos, mas sim como pro- cesso de criação de valor." Após este primeiro encon- tro ficou REIVINDI- CAM NOVA POLÍ- TICA DE ATRIBUI- ÇÃO DE BOLSAS #12;

  20. Analysis and Qualification Documentation The NSTX Upgrade Team

    E-Print Network [OSTI]

    Princeton Plasma Physics Laboratory

    Upgrade Final Design Review (6/22/2011) 4 NSTX CSU Calculation Index Historically What is Available Lodestar MIT Nova Photonics New York U ORNL PPPL Princeton U Purdue U SNL Think Tank, Inc. UC Davis UC Center Stack Upgrade Final Design Review (6/22/2011) Overview · This presentation is an overview