Sample records for middle piney cr

  1. Fixed-bed gasification research using US coals. Volume 7. Gasification of Piney Tipple bituminous coal

    SciTech Connect (OSTI)

    Thimsen, D.; Maurer, R.E.; Pooler, A.R.; Pui, D.; Liu, B.; Kittelson, D.

    1985-05-01T23:59:59.000Z

    A single-staged, fixed-bed Wellman-Galusha gasifier coupled with a hot, raw gas combustion system and scrubber has been used to gasify numerous coals from throughout the United States. The gasification test program is organized as a cooperative effort by private industrial participants and governmental agencies. The consortium of participants is organized under the Mining and Industrial Fuel Gas (MIFGa) Group. This report is the seventh volume in a series of reports describing the atmospheric pressure, fixed-bed gasification of US coals. This specific report describes the gasification of Piney Tipple bituminous coal. The period of the gasification test was July 18-24, 1983. 6 refs., 20 figs., 17 tabs.

  2. Blanchard Cr JohnsonGulch

    E-Print Network [OSTI]

    Dirt yfaceCr Sheep Cr Essex Cr Dic key Cr Paola Cr Cr ystalCr Deerlick Cr Howe Cr M id dle Fork FlatheadRiver Mid dle Fork Bowl C r So u th Fork Scalp Cr West Fork WhistlerCr GraniteCr DodgeCr Flathea d

  3. Blanchard Cr West Fk Clearwater R

    E-Print Network [OSTI]

    Dirt yfaceCr Sheep Cr Essex Cr Dick ey Cr Paola Cr Cry stalCr Deerlick Cr Howe Cr M id dle Fork FlatheadRiver Mid dle Fork Bowl Cr So u th Fork Scalp Cr West Fork WhistlerCr GraniteCr DodgeCr Flathead

  4. Middle East

    SciTech Connect (OSTI)

    Hemer, D.O. (Mobil Oil Corp., New York, NY); Mason, J.F.; Hatch, G.C.

    1981-10-01T23:59:59.000Z

    Petroleum production in Middle East countries during 1980 totaled 6,747,719,000 bbl or an average rate of 18,436,390,000 bbl/d, down 13.9% from 1979. Increases were in Saudi Arabia and Syria. Significant decreases occurred in Iraq, Iran, Kuwait, and Turkey. New discoveries were made in Abu Dhabi, Iran, Saudi Arabia, Sharjah, and Oman. New areas were explored in Bahrain, Oman, Syria, and Yemen. 9 figures, 16 tables.

  5. Middle Snake Subbasins Inventory

    E-Print Network [OSTI]

    Middle Snake Subbasins Inventory May 2004 Compiled by Ecovista Contracted by Shoshone-Paiute Tribes #12;Middle Snake Subbasins Inventory i May 2004 Table of Contents 1 INTRODUCTION

  6. Longfellow Middle School Wins Virginia Middle School Science...

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

    Longfellow Middle School Wins Virginia Middle School Science Bowl on March 7 2014 Virginia Middle School Science Bowl At the end of the day, the team from Longfellow Middle School,...

  7. MA 125-4 CR PH 105-4 CR

    E-Print Network [OSTI]

    Carver, Jeffrey C.

    490-3 CR Mechanical Engineering Design I I Proj Lab Proj Lab MA 125-4 CR Calculus I or Equivalent M MEMA 125-4 CR Calculus I or Equivalent PH 105-4 CR Gen Physics with Calculus MA 126-4 CR Calculus I I or Equivalent M Required Course Elective Course Prerequisite NS M W LAB Proj Lab Natural Science Mathematics

  8. Oxidation behavior of Cr-Cr{sub 2}Nb alloys

    SciTech Connect (OSTI)

    Tortorelli, P.F.; Pint, B.A.

    1996-12-31T23:59:59.000Z

    Oxidation of hypoeutectic Cr-Cr{sub 2}Nb alloys containing 6 and 12% Nb at 950 C resulted in formation of a multiproduct scale consisting of a continuous Cr{sub 2}O{sub 3} outer layer and an inner region of discrete CrNbO{sub 4} products interspersed with Cr{sub 2}O{sub 3}. Overall oxidation behavior resembled that of Cr as reactions with the Cr-rich phase tended to dominate. Oxidation resistance, in terms of reaction kinetics and scale adherence, increased with increasing volume fraction of the Cr-Cr{sub 2}Nb eutectic phase. A model for the oxidation of these alloys based on the growth of Cr{sub 2}O{sub 3} on the Cr-rich matrix regions and the formation of a slower growing CrNbO{sub 4} on the Cr{sub 2}Nb-enriched phase can qualitatively explain the development of the multiproduct scale and the observed gravimetric and spallation results. Possible microstructural/compositional modifications to improve oxidation resistance are suggested.

  9. Electronics I 4 cr with Lab

    E-Print Network [OSTI]

    Carver, Jeffrey C.

    ECE 332 Electronics I 4 cr with Lab ECE 370 Signals & Systems 3 cr co ECE 225 Electric Circuits 3 106 - 4 cr General Physics with Calculus CS 116 - 1 cr Intro to Comp. Program. Lab co MATH 227 4 cr cr Department of Electrical and Computer Engineering -- Department of Physics and Astromony

  10. Middle School Science Bowl 2012

    SciTech Connect (OSTI)

    None

    2012-01-01T23:59:59.000Z

    Middle school students from across Iowa converged on Ames Feb. 24 and 25, 2012 to compete in the Middle School Science Bowl and car competition.

  11. Nanoscale Phase Separation In Epitaxial Cr-Mo and Cr-V Alloy...

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

    Separation In Epitaxial Cr-Mo and Cr-V Alloy Thin Films Studied Using Atom Probe Tomography: Comparison Of Nanoscale Phase Separation In Epitaxial Cr-Mo and Cr-V Alloy Thin Films...

  12. Mathematics Required Courses Cr. Semester Gr.

    E-Print Network [OSTI]

    Delene, David J.

    Discrete Mathematics 3 Math 321 or Math 421 Applied Stat. Methods Stat. Theory I 3 Elective Course* Cr Student: ID# Catalog: Advisor Upper Division Courses* Required Courses Cr. Semester Gr. *20 cr

  13. Tennessee: Bringing Jobs and Economic Development to Piney Flats...

    Energy Savers [EERE]

    design, accounting, and safety training Produce product installation training videos. The Weatherization and Intergovernmental Programs Office (WIPO) provides funding and...

  14. Tennessee: Bringing Jobs and Economic Development to Piney Flats |

    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: AlternativeEnvironment,Institutes and1Telework Telework The Department's teleworkDepartment of

  15. Piney Point Village, Texas: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy ResourcesLoadingPenobscot County, Maine: EnergyPierceJump to: navigation, search Equivalent URIPiney

  16. 2015 Middle School Team Photos

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

    Middle-School-Team-Photos Sign In About | Careers | Contact | Investors | bpa.gov Search News & Us Expand News & Us Projects & Initiatives Expand Projects & Initiatives...

  17. Improvement of SOFC Electrodes through Catalyst Infiltration & Control of Cr Volatilization from FeCr Components

    SciTech Connect (OSTI)

    Visco, S.J.; Jacobson, C.; Kurokawa, H.; Sholklapper, T.; Lu, C.; De Jonghe, L.

    2005-01-28T23:59:59.000Z

    This presentation discusses the improvement of SOFC electrodes through catalyst infiltration and control of Cr volatilization from FeCr components.

  18. Underpinning Mathematics/Science: (min 40 cr) Mathematics (16 cr)

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    Materials Science and Engineering BS Degree Requirements for students beginning in or after Fall 2011 04 324 Introductory Applied Statistics for Engineers Physics (10 cr) Phys 201 or Phys 207 or Phys 247 Modern Physics for Engineers Phys 235 Introduction to Solid State Electronics Phys 241 Intro to Modern

  19. al cd cr: Topics by E-print Network

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

    junctions with CrFe and CrFeCr barriers. Although the exact... Robinson, J. W. A.; Banerjee, N.; Blamire, M. G. 2014-03-05 134 SEM CR GRADE Intro to Chem Eng 1 Engineering...

  20. MIDDLE EARTH MOVE OUT INFORMATION 2013

    E-Print Network [OSTI]

    Barrett, Jeffrey A.

    MIDDLE EARTH MOVE OUT INFORMATION 2013 Start thinking about the move-out process now. If you to you by your RA, sent to you by e-mail, and updated on the Middle Earth website (http://www.housing.uci.edu/housingOptions/Middle_Earth noon on June 15th must submit a written request to the Middle Earth Housing Office at middleearth

  1. I. NANOSCIENCE COURSE REQUIREMENTS CR A. Communication Skills (8 cr.) CR APSC-101 Applied Science Profession I 1 ENGL-101 Freshman English Composition Required OR 3

    E-Print Network [OSTI]

    Wu, Mingshen

    I. NANOSCIENCE COURSE REQUIREMENTS CR A. Communication Skills (8 cr.) CR APSC-101 Applied Science OF SCIENCE Concentration in Nanoscience University of Wisconsin-Stout 2010-2011 #12;I. MATERIALS SCIENCE

  2. Thermodynamics of Cr2O3, FeCr2O4, ZnCr2O4 and CoCr2O4

    SciTech Connect (OSTI)

    Ziemniak SE, Anovitz LM, Castelli RA, Porter WD

    2007-01-09T23:59:59.000Z

    High temperature heat capacity measurements were obtained for Cr{sub 2}O{sub 3}, FeCr{sub 2}O{sub 4}, ZnCr{sub 2}O{sub 4} and CoCr{sub 2}O{sub 4} using a differential scanning calorimeter. These data were combined with previously-available, overlapping heat capacity data at temperatures up to 400 K and fitted to 5-parameter Maier-Kelley C{sub p}(T) equations. Expressions for molar entropy were then derived by suitable integration of the Maier-Kelley equations in combination with recent S{sup o}(298) evaluations. Finally, a database of high temperature equilibrium measurements on the formation of these oxides was constructed and critically evaluated. Gibbs energies of Cr{sub 2}O{sub 3}, FeCr{sub 2}O{sub 4} and CoCr{sub 2}O{sub 4} were referenced by averaging the most reliable results at reference temperatures of 1100, 1400 and 1373 K, respectively, while Gibbs energies for ZnCr{sub 2}O{sub 4} were referenced to the results of Jacob [Thermochim. Acta 15 (1976) 79-87] at 1100 K. Thermodynamic extrapolations from the high temperature reference points to 298.15 K by application of the heat capacity correlations gave {Delta}{sub f}G{sup o}(298) = -1049.96, -1339.40, -1428.35 and -1326.75 kJ mol{sup -1} for Cr{sub 2}O{sub 3}, FeCr{sub 2}O{sub 4}, ZnCr{sub 2}O{sub 4} and CoCr{sub 2}O{sub 4}, respectively.

  3. Middle East 2007 EAGE 71

    E-Print Network [OSTI]

    Ali, Mohammed

    passive seismic experiment was con- ducted over an onshore carbonate oilfield in Abu Dhabi in an effort over a number of hydrocarbon reservoirs mainly in the Middle East including some oilfields in Abu Dhabi by different depositional facies. This oilfield was selected as a suitable site for the experiment because

  4. Nine teams compete in Virginia Middle School Science Bowl competition...

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

    Nine teams compete in Virginia Middle School Science Bowl competition at Jefferson Lab on March 11 March 17, 2006 Peasley Middle School The Peasley Middle School Team from...

  5. Longfellow Middle School Edges Out Gildersleeve to Win 2011 Virginia...

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

    Longfellow Middle School Edges Out Gildersleeve to Win 2011 Virginia Middle School Science Bowl 1stplaceLongfellow.jpg The team from Longfellow Middle School, Falls Church, won...

  6. Watermelon-like iron nanoparticles: Cr doping effect on magnetism...

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

    Watermelon-like iron nanoparticles: Cr doping effect on magnetism and magnetization interaction reversal. Watermelon-like iron nanoparticles: Cr doping effect on magnetism and...

  7. AVTA: 2010 Honda CR-Z Hybrid Downloadable Dynamometer Database...

    Energy Savers [EERE]

    CR-Z Hybrid Downloadable Dynamometer Database Reports AVTA: 2010 Honda CR-Z Hybrid Downloadable Dynamometer Database Reports The Vehicle Technologies Office's Advanced Vehicle...

  8. Middle School Academic Question Resources | U.S. DOE Office of...

    Office of Science (SC) Website

    Academic Question Resources National Science Bowl (NSB) NSB Home About High School Middle School Middle School Students Middle School Coaches Middle School Regionals Middle...

  9. CR-B-02-01.PDF

    Office of Environmental Management (EM)

    CR-B-02-01 AUDIT REPORT FIXED-PRICE CONTRACTING FOR DEPARTMENT OF ENERGY CLEANUP ACTIVITIES OCTOBER 2001 U.S. DEPARTMENT OF ENERGY OFFICE OF INSPECTOR GENERAL OFFICE OF AUDIT...

  10. CR-B-02-02.PUB

    Energy Savers [EERE]

    CR-B-02-02 AUDIT REPORT U.S. DEPARTMENT OF ENERGY OFFICE OF INSPECTOR GENERAL OFFICE OF AUDIT SERVICES PROCUREMENT ADMINISTRATION AT BROOKHAVEN NATIONAL LABORATORY AUGUST 2002 U....

  11. Lady Bird Johnson Middle School

    E-Print Network [OSTI]

    Scrivner, J.

    2014-01-01T23:59:59.000Z

    - 600KW array $2,976,972.00 $19.55 Wind Turbines - 12 Skystream units $143,217.00 $0.94 Geothermal HVAC Water Well $277,194.00 $1.82 Water collection tank $27,125.00 $0.18 Native landscaping/ bio swales $3,000.00 $0.02 Energy monitoring system - Convia...Irving Independent School District Jim Scrivner Energy Manager jscrivner@irvingisd.net Lady Bird JOHNSON MIDDLE SCHOOL Engineer: Image Engineering Group, LLC Don Penn, President dpenn@iegltd.com Architect: Corgan Associates, Inc Susan Smith, Vice...

  12. Triplet pair correlations and nonmonotonic supercurrent decay with Cr thickness in Nb/Cr/Fe/Nb Josephson devices

    E-Print Network [OSTI]

    Robinson, J. W. A.; Banerjee, N.; Blamire, M. G.

    2014-03-05T23:59:59.000Z

    roughness and interdiffusion, an antiferromagnetic spin density wave (SDW) state can still form in Cr close to the interface. Here, we show evidence for triplet pair correlations in Josephson junctions with Cr/Fe and Cr/Fe/Cr barriers. Although the exact...

  13. Are You Smarter Than a Middle Schooler?

    Broader source: Energy.gov [DOE]

    Test your knowledge of math and science against the middle school finalists in the National Science Bowl with these 10 questions.

  14. A comparison between a Middle English carol and a Middle High German Minnelied

    E-Print Network [OSTI]

    Birkner, Karen Astrid Morris

    2012-06-07T23:59:59.000Z

    This thesis is a comparison between two medieval courtly love lyrics. One lyric is an anonymous Middle English carol; the other is a Middle High German song composed by Walther von der Vogelweide. The English carol is 'Blow, northerne wynd...

  15. Proceedings of IADC Middle East Drilling Conference, Dubai, November 1998. 1 IADC Middle East Drilling Conference

    E-Print Network [OSTI]

    Aamodt, Agnar

    Proceedings of IADC Middle East Drilling Conference, Dubai, November 1998. 1 IADC Middle East Drilling Conference Case-Based Reasoning, a method for gaining experience and giving advise on how to avoid and how to free stuck drill strings. IADC Middle East Drilling Conference, Dubai, Nov. 3 - 4, 1998. P

  16. -delayed proton emission branches in 43Cr

    SciTech Connect (OSTI)

    Pomorski, M. [University of Warsaw; Miernik, K. [University of Warsaw; Dominik, W. [University of Warsaw; Janas, Z. [University of Warsaw; Pfutzner, M. [University of Warsaw; Bingham, C. R. [University of Tennessee, Knoxville (UTK); Czyrkowski, H. [University of Warsaw; Cwiok, Mikolaj [Warsaw University; Darby, Iain [University of Tennessee, Knoxville (UTK); Dabrowski, Ryszard [Warsaw University; Ginter, T. N. [Michigan State University, East Lansing; Grzywacz, Robert Kazimierz [ORNL; Karny, M. [University of Warsaw; Korgul, A. [University of Warsaw; Kusmierz, W. [University of Warsaw; Liddick, Sean [University of Tennessee, Knoxville (UTK); Rajabali, M. M. [University of Tennessee, Knoxville (UTK); Rykaczewski, Krzysztof Piotr [ORNL; Stolz, A. [Michigan State University, East Lansing

    2011-01-01T23:59:59.000Z

    The + decay of very neutron-deficient 43Cr was studied by means of an imaging time projection chamber that allowed recording tracks of charged particles. Events of -delayed emission of one, two, and three protons were clearly identified. The absolute branching ratios for these channels were determined to be (81 4)%, (7.1 0.4)%, and (0.08 0.03)%, respectively. 43Cr is thus established as the second case in which the -3p decay occurs. Although the feeding to the proton-bound states in 43V is expected to be negligible, the large branching ratio of (12 4)% for decays without proton emission is found.

  17. Some challenges of middle atmosphere data assimilation

    E-Print Network [OSTI]

    Wirosoetisno, Djoko

    Some challenges of middle atmosphere data assimilation 1234567 89A64BC7DEF72B4 8629EEC7C72DEEE5.1256/qj.05.87 Some challenges of middle atmosphere data assimilation By S. POLAVARAPU1,2, T. G. SHEPHERD2 Data assimilation is employed at operational weather forecast centres to combine measurements and model

  18. LADY BIRD JOHNSON MIDDLE SCHOOL IRVING, TX

    E-Print Network [OSTI]

    and purge ports. #12;LADY BIRD JOHNSON MIDDLE SCHOOL IRVING, TX 3' x 5' Solar Panels 191 watts per panel 600 KW Solar Array 2,988 Solar Panels 850,000 kWh Annual Output Solar Classroom Deck SOLAR PV SYSTEM #12 in the United States #12;LADY BIRD JOHNSON MIDDLE SCHOOL IRVING, TX THE LAYOUT AFTER HOURS GYM ENTRY SOLAR

  19. Morphology, deformation, and defect structures of TiCr{sub 2} in Ti-Cr alloys

    SciTech Connect (OSTI)

    Chen, K.C.; Allen, S.M.; Livingston, J.D.

    1992-12-31T23:59:59.000Z

    The morphologies and defect structures of TiCr{sub 2} in several Ti-Cr alloys have been examined by optical metallography, x-ray diffraction, and transmission electron microscopy (TEM), in order to explore the room-temperature deformability of the Laves phase TiCr{sub 2}. The morphology of the Laves phase was found to be dependent upon alloy composition and annealing temperature. Samples deformed by compression have also been studied using TEM. Comparisons of microstructures before and after deformation suggest an increase in twin, stacking fault, and dislocation density within the Laves phase, indicating some but not extensive room-temperature deformability.

  20. NUREG/CR-6870 Consideration of Geochemical

    E-Print Network [OSTI]

    in Groundwater Restoration at Uranium In-Situ Leach Mining Facilities Manuscript Completed: December 2006 Date associated with uranium mining sites throughout the United States are also included in this report. A tableNUREG/CR-6870 Consideration of Geochemical Issues in Groundwater Restoration at Uranium In

  1. Ames repeats as Middle School Science Bowl Champion | The Ames...

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

    repeats as Middle School Science Bowl Champion Ames Middle School repeated as champion of the 2015 Ames LaboratoryIowa State University Regional Middle School Science Bowl here on...

  2. National Science Bowl Update: Middle School Teams from Maryland...

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

    Science Bowl Update: Middle School Teams from Maryland and Indiana to Compete for National Championship on Monday National Science Bowl Update: Middle School Teams from Maryland...

  3. Media Advisory: Virginia Middle School Science Bowl Set For March...

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

    Virginia Middle School Science Bowl Set For March 5 at Jefferson Lab What: The Department of Energy's 2011 Virginia Regional Middle School Science Bowl When: Saturday, March 5,...

  4. East Middle School and Cayuga Community College Space Heating...

    Open Energy Info (EERE)

    Middle School and Cayuga Community College Space Heating Low Temperature Geothermal Facility Jump to: navigation, search Name East Middle School and Cayuga Community College Space...

  5. Calloway Middle School Honored at DOE National Science Bowl,...

    Office of Environmental Management (EM)

    Calloway Middle School Honored at DOE National Science Bowl, Lone Oak Competes Among High Schools Calloway Middle School Honored at DOE National Science Bowl, Lone Oak Competes...

  6. Teachers and JLab scientists help middle-school science instructors...

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

    Valerie Bicouvaris, Berkeley MIddle School, Williamsburg Valerie Bicouvaris, Berkeley Middle School, Williamsburg, uses magnetism to conduct a "magic" trick during the course...

  7. E-Print Network 3.0 - aceros al cr-mo-v Sample Search Results

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

    G. F. Janssens, Dierk Raabe, Ernst Kozeschnik, Mark A. Miodownik, Summary: , ,,Dissimilar 2.25Cr-9Cr and 2Cr-0.5CrMoV steel welds, I. Characterisation of the weld zone and...

  8. Cr-doped scandium borate laser

    DOE Patents [OSTI]

    Chai, Bruce H. (Bridgewater, NJ); Lai, Shui T. (Florham Park, NJ); Long, Margaret N. (Landing, NJ)

    1989-01-01T23:59:59.000Z

    A broadly wavelength-tunable laser is provided which comprises as the laser medium a single crystal of MBO.sub.3 :Cr.sup.3+, where M is selected from the group of Sc, In and Lu. The laser may be operated over a broad temperature range from cryogenic temperatures to elevated temperatures. Emission is in a spectral range from red to infrared, and the laser is useful in the fields of defense, communications, isotope separation, photochemistry, etc.

  9. Carbon migration in 5Cr-0.5Mo/21Cr-12Ni dissimilar metal welds

    SciTech Connect (OSTI)

    Huang, M.L.; Wang, L. [Dalian Univ. of Technology (China). Dept. of Materials Engineering

    1998-12-01T23:59:59.000Z

    The carbon migration between a ferritic steel and an austenitic steel was studied in submerged arc-welded 5Cr-0.5Mo/21Cr-12Ni dissimilar metal welds (DMWs) after aging at 500 C for various times and after long-term service in technical practice. The distribution of carbon, chromium, nickel, and iron in the areas around the weld interface was determined by electron probe microanalysis, and the microstructural aspect in the carbon-depleted/enriched zone was characterized by optical microscopy and transmission electron microscopy (TEM). Furthermore, the precipitation sequences and composition characteristics of the carbides were identified by diffraction pattern microanalysis and energy-dispersive X-ray (EDX) microanalysis. It was found (1) that there exists a coherent relationship between intracrystalline M{sub 23}C{sub 6} and the austenitic matrix; (2) that the composition of M{sub 23}C{sub 6} in the carbon-enriched zone is independent of the duration of aging and service; (3) that the maximum carbon concentration is determined by the carbide type, the composition characteristic of precipitated carbides, and the concentration of carbide-forming Cr adjacent to the weld interface in the carbon-enriched zone; and (4) that the carbon migration in the 5Cr-0.5Mo/21Cr-12Ni DMWs can be described by a diffusion model.

  10. The following 24 credits are required. Course Cr Semester Course Cr Semester

    E-Print Network [OSTI]

    Watson, Craig A.

    Fundamentals of Pest Management 3 Soil and Water Science Minor 15 credits required Course Cr Required SWS Agriculture & Environmental Quality 3 SWS2007 World of Water 3 SWS2008 Humans, Soils, & Environmental Impact 3 SWS3023L Soil Judging 2 SWS4116 Environmental Nutrient Management 3 SWS4223 Environmental

  11. CR mammography: Design and implementation of a quality control program

    SciTech Connect (OSTI)

    Moreno-Ramirez, A.; Brandan, M. E.; Villasenor-Navarro, Y.; Galvan, H. A.; Ruiz-Trejo, C. [Instituto de Fisica, Universidad Nacional Autonoma de Mexico, DF 04510 (Mexico); Departamento de Radiodiagnostico, Instituto Nacional de Cancerologia, DF 14080 (Mexico); Instituto de Fisica, Universidad Nacional Autonoma de Mexico, DF 04510 (Mexico)

    2012-10-23T23:59:59.000Z

    Despite the recent acquisition of significant quantities of computed radiography CR equipment for mammography, Mexican regulations do not specify the performance requirements for digital systems such as those of CR type. The design of a quality control program QCP specific for CR mammography systems was thus considered relevant. International protocols were taken as reference to define tests, procedures and acceptance criteria. The designed QCP was applied in three CR mammography facilities. Important deficiencies in spatial resolution, noise, image receptor homogeneity, artifacts and breast thickness compensation were detected.

  12. Risk-assessment-methodology development for waste isolation in geologic media. Technical review of documents NUREG/CR-0394, NUREG/CR-0424, NUREG/CR-0458

    SciTech Connect (OSTI)

    Stevens, C.A.; Fullwood, R.R.; Basin, S.L.

    1980-11-01T23:59:59.000Z

    A review of five documents that were prepared for the USNRC by Sandia Laboratories is presented in this report. The documents covered in the present review include: NUREG/CR-1262, NUREG/CR-1376, NUREG/CR-1377, NUREG/CR-1397 and NUREG/CR-1608. This constitutes the second phase of the review; the first phase was reported in Volume 1 of NUREG/CR-1672, November 1980. Two of the documents concern simplified computational methods illustrative of the calculations necessary to produce a response surface. Three of the reports pertain to statistical methods, including the application of Latin hypercube Sampling (LHS). The following observations have been made relative to the above reports: (1) the reports are, in general, difficult to read, due, in part, to unnecessarily complicated notation and lack of adequate explanation and examples, (2) the relationship of the work to similar work in the US and abroad is not discussed, and (3) limitations of the LHS method are not discussed in sufficient depth. The Sandia's response to this review is published as NUREG/CR-2428. Volume 1 is scheduled for completion in June 1982.

  13. The Middle Class in the Middle Kingdom: Regime Support for the Chinese Leadership?

    E-Print Network [OSTI]

    Paden, Eric

    2013-08-31T23:59:59.000Z

    Over the last thirty years China has witnessed economic development at an extraordinary rate. China has also developed a growing urban middle class. However, China remains the world's largest authoritarian regime. Modernization ...

  14. NUREG/CR-6911 Tests of Uranium (VI) Adsorption

    E-Print Network [OSTI]

    NUREG/CR-6911 Tests of Uranium (VI) Adsorption Models in a Field Setting U.S. Geological Survey U/CR-6911 Tests of Uranium (VI) Adsorption Models in a Field Setting Manuscript Completed: August 2006 Date Published: August 2006 Prepared by G. P. Curtis, J. A. Davis Water Resources Division U.S. Geological Survey

  15. Middle Class and Middle School: Does Opportunity Knock for African American Students?

    E-Print Network [OSTI]

    Mooney, Patricia 1960-

    2012-12-10T23:59:59.000Z

    the shortcomings in NCLB (2001), President Barack Obama signed The American Recovery and Reinvestment Act (ARRA) into law. Race to the Top (RTTT) was established by the AARA as a competitive grant program to encourage and reward States to participate...MIDDLE CLASS AND MIDDLE SCHOOL: DOES OPPORTUNITY KNOCK FOR AFRICAN AMERICAN STUDENTS? A Record of Study by Patricia Ann Mooney Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment...

  16. EECBG Success Story: Massachusetts Middle School Goes Local for...

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

    Massachusetts Middle School Goes Local for PV Solar Energy System EECBG Success Story: Massachusetts Middle School Goes Local for PV Solar Energy System August 13, 2010 - 11:21am...

  17. Microsoft Word - DOE News Release - Henderson North Middle School...

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

    February 6, 2015 Robert.Smith@lex.doe.gov Henderson North Middle School wins 2015 DOE West Kentucky Regional Science Bowl PADUCAH, Ky. - Henderson North Middle School won the U.S....

  18. Maryland team wins Virginia/Maryland Regional Middle School Science...

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

    Robert Frost Middle School Robert Frost Middle School won the VirginiaMaryland Regional Science Bowl hosted by Jefferson Lab on March 5. The team includes (left to right) Sherwin...

  19. Media Advisory - The Virginia Middle School Science Bowl Is Set...

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

    The Virginia Middle School Science Bowl Is Set For March 6 at Jefferson Lab What: The 2010 Virginia Regional Middle School Science Bowl When: Saturday, March 6, 2010. Round-robin...

  20. An Economic Study of Farm Organization in the Piney Woods Farming Area of Texas.

    E-Print Network [OSTI]

    Bonnen, C. A. (Clarence Alfred); Thibodeaux, B. H.; Criswell, J. F.

    1932-01-01T23:59:59.000Z

    majority of farms, cotton is the only commercial enterprise of importance; other enterprises are included primarily to supply farm and family requirements for feed and food. The commercial production of tomatoes, sweet potatoes, watermelons, numerous 1... the data from the detailed farm accounts. Records were obtained on the dairy, tomato, sweet potato, pea, and watermelon enter- prises. Information was obtained on the man labor, horse work, material requirements, and cash costs used in production...

  1. BR UFF BIG PINEY WILD ROSE BLU E GAP BR UFF UNIT WAMSUT TER

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) " ,"Click worksheet9,1,50022,3,,,,6,1,,781Title: Telephone:shortOil and Natural8U.S.NALiquidsBOE Reserve

  2. BR UFF BIG PINEY WILD ROSE BLU E GAP BR UFF UNIT WAMSUT TER

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) " ,"Click worksheet9,1,50022,3,,,,6,1,,781Title: Telephone:shortOil and Natural8U.S.NALiquidsBOE ReserveGas

  3. BR UFF BIG PINEY WILD ROSE BLU E GAP BR UFF UNIT WAMSUT TER

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) " ,"Click worksheet9,1,50022,3,,,,6,1,,781Title: Telephone:shortOil and Natural8U.S.NALiquidsBOE

  4. The post-war Middle East

    SciTech Connect (OSTI)

    Tempest, P.

    1992-03-09T23:59:59.000Z

    The Middle East remains today the global energy fulcrum. One year after the Persian Gulf war, the region is in greater turmoil and political uncertainty than it has known in modern times. The Iraqi invasion of Kuwait and subsequent external military intervention forced neighboring states to question the need for a foreign military presence in the future. The rift between the secular revolutionary states in the region led by Iraq, Libya, Yemen, Algeria, and Syria and the traditional monarchy of Saudi Arabia and the emirates of the gulf has widened. Egypt provides, at present, an uncomfortable bridge. The balance of political forces may be shifting. This paper attempts to answer the following questions: Where will we see the new leadership in the Middle East Will it again play a role through the Organization of Petroleum Exporting Countries and determination of the oil price in shaping the structure of global energy supply and demand

  5. An Accelerator Control Middle Layer Using MATLAB

    SciTech Connect (OSTI)

    Portmann, Gregory J.; Corbett, Jeff; Terebilo, Andrei

    2005-03-15T23:59:59.000Z

    Matlab is a matrix manipulation language originally developed to be a convenient language for using the LINPACK and EISPACK libraries. What makes Matlab so appealing for accelerator physics is the combination of a matrix oriented programming language, an active workspace for system variables, powerful graphics capability, built-in math libraries, and platform independence. A number of software toolboxes for accelerators have been written in Matlab--the Accelerator Toolbox (AT) for machine simulations, LOCO for accelerator calibration, Matlab Channel Access Toolbox (MCA) for EPICS connections, and the Middle Layer. This paper will describe the ''middle layer'' software toolbox that resides between the high-level control applications and the low-level accelerator control system. This software was a collaborative effort between ALS (LBNL) and SPEAR3 (SSRL) but easily ports to other machines. Five accelerators presently use this software. The high-level Middle Layer functionality includes energy ramp, configuration control (save/restore), global orbit correction, local photon beam steering, insertion device compensation, beam-based alignment, tune correction, response matrix measurement, and script-based programs for machine physics studies.

  6. An Accelerator Control Middle Layer Using MATLAB

    SciTech Connect (OSTI)

    Portmann, Gregory J.; Corbett, Jeff; Terebilo, Andrei

    2005-05-15T23:59:59.000Z

    Matlab is an interpretive programming language originally developed for convenient use with the LINPACK and EISPACK libraries. Matlab is appealing for accelerator physics because it is matrix-oriented, provides an active workspace for system variables, powerful graphics capabilities, built-in math libraries, and platform independence. A number of accelerator software toolboxes have been written in Matlab -- the Accelerator Toolbox (AT) for model-based machine simulations, LOCO for on-line model calibration, and Matlab Channel Access (MCA) to connect with EPICS. The function of the MATLAB ''MiddleLayer'' is to provide a scripting language for machine simulations and on-line control, including non-EPICS based control systems. The MiddleLayer has simplified and streamlined development of high-level applications including configuration control, energy ramp, orbit correction, photon beam steering, ID compensation, beam-based alignment, tune correction and response matrix measurement. The database-driven Middle Layer software is largely machine-independent and easy to port. Six accelerators presently use the software package with more scheduled to come on line soon.

  7. Usnesen ze 4. zasedn Vdeck rady AV CR konanho dne 10. z 1. Oven a kontrola zpisu z 3. zasedn

    E-Print Network [OSTI]

    Tebbens, Jurjen Duintjer

    reform terciárního vzdlávání. Vdecká rada AV CR bere se souhlasem na vdomí stanovisko AR AV CR k reform

  8. Page 1 | B.A. in Middle Grades Education | Academic Plan of Study Updated March 2014 B.A. in Middle Grades Education

    E-Print Network [OSTI]

    Raja, Anita

    Page 1 | B.A. in Middle Grades Education | Academic Plan of Study Updated March 2014 B.A. in Middle 2 | B.A. in Middle Grades Education | Academic Plan of Study Updated March 2014 Middle Grades Grades Education Academic Plan of Study College of Education Department of Middle, Secondary and K-12

  9. 9 Cr-- 1 Mo steel material for high temperature application

    DOE Patents [OSTI]

    Jablonski, Paul D; Alman, David; Dogan, Omer; Holcomb, Gordon; Cowen, Christopher

    2012-11-27T23:59:59.000Z

    One or more embodiments relates to a high-temperature, titanium alloyed, 9 Cr-1 Mo steel exhibiting improved creep strength and oxidation resistance at service temperatures up to 650.degree. C. The 9 Cr-1 Mo steel has a tempered martensite microstructure and is comprised of both large (0.5-3 .mu.m) primary titanium carbides and small (5-50 nm) secondary titanium carbides in a ratio of. from about 1:1.5 to about 1.5:1. The 9 Cr-1 Mo steel may be fabricated using exemplary austenizing, rapid cooling, and tempering steps without subsequent hot working requirements. The 9 Cr-1 Mo steel exhibits improvements in total mass gain, yield strength, and time-to-rupture over ASTM P91 and ASTM P92 at the temperature and time conditions examined.

  10. TI--CR--AL--O thin film resistors

    DOE Patents [OSTI]

    Jankowski, Alan F. (Livermore, CA); Schmid, Anthony P. (Solana Beach, CA)

    2000-01-01T23:59:59.000Z

    Thin films of Ti--Cr--Al--O are used as a resistor material. The films are rf sputter deposited from ceramic targets using a reactive working gas mixture of Ar and O.sub.2. Resistivity values from 10.sup.4 to 10.sup.10 Ohm-cm have been measured for Ti--Cr--Al--O film <1 .mu.m thick. The film resistivity can be discretely selected through control of the target composition and the deposition parameters. The application of Ti--Cr--Al--O as a thin film resistor has been found to be thermodynamically stable, unlike other metal-oxide films. The Ti--Cr--Al--O film can be used as a vertical or lateral resistor, for example, as a layer beneath a field emission cathode in a flat panel display; or used to control surface emissivity, for example, as a coating on an insulating material such as vertical wall supports in flat panel displays.

  11. COURSE OR OR CR. MATH 201f 3

    E-Print Network [OSTI]

    Shihadeh, Alan

    P.O.Box: CR. 30 COURSE OR OR CR. MATH 201f 3 MATH 210f 3 MATH 218 MATH 219 3 STAT 233 f 3 STAT 234 f 3 STAT 235 f 3 STAT 236 f 3 STAT 237 f 3 STAT 238 f 3 ELECT .1 3 ELECT .2 3 ELECT .3 3 36 CMPS 200 : NAME: Tel #: ID #: MAY NOT ENROLL IN CVSP 203 OR 204 OR VICE VERSA. 3 ELECTIVES IN HUMANITIES OR SOCIAL

  12. COURSE OR OR CR. MATH 201f 3

    E-Print Network [OSTI]

    Shihadeh, Alan

    P.O.Box: CR. 30 COURSE OR OR CR. MATH 201f 3 MATH 210f 3 MATH 219 3 STAT 233f 3 STAT 234f 3 STAT 235f 3 STAT 236f 3 STAT 237f 3 STAT 238f 3 ELECT. 1 3 ELECT. 2 3 ELECT. 3 3 36 CMPS 200 4 ELECT. 1 3 OR EQUIVALENTa : NAME: Tel #: ID #: E-mail: @aub.edu.lb DIPLOMA TYPE : ENTRY LEVEL: FR SO JR SR COMMENTS Total

  13. COURSE OR OR CR. STAT 235f 3

    E-Print Network [OSTI]

    Shihadeh, Alan

    P.O.Box: CR. 30 COURSE OR OR CR. MATH 201 f 3 MATH 210 f 3 MATH 219 3 STAT 233 f 3 STAT 234 f 3 STAT 235f 3 STAT 236 f 3 STAT 237f 3 STAT 238f 3 ELECT. 1 3 ELECT. 2 3 ELECT. 3 3 36 CMPS 200 4 ELECT WHO ELECT CVSP 206 FRESHMAN CLASS OR EQUIVALENT a : NAME: Tel #: ID #: E-mail: @aub.edu.lb DIPLOMA

  14. COURSE or or CR. MATH 218 MATH 219 3

    E-Print Network [OSTI]

    Shihadeh, Alan

    P.O.Box: CR. 30 COURSE or or CR. MATH 201 e 3 MATH 210 e 3 MATH 218 MATH 219 3 STAT 233e 3 STAT 234e 3 STAT 235e 3 STAT 236e 3 STAT 237e 3 STAT 238e 3 ELECT .1 3 ELECT .2 3 ELECT .3 3 36 ELECT. 1 3 3 credits requirement for graduation. ID #: E-mail: @aub.edu.lb DIPLOMA TYPE : ENTRY LEVEL: FR SO JR SR

  15. COURSE OR OR CR. MATH 201f 3

    E-Print Network [OSTI]

    Shihadeh, Alan

    P.O.Box: CR. 30 COURSE OR OR CR. MATH 201f 3 MATH 210 f 3 MATH 219 3 STAT 233f 3 STAT 234 f 3 STAT 235 f 3 STAT 236 f 3 STAT 237 f 3 STAT 238 f 3 ELECT. 1 3 ELECT. 2 3 ELECT. 3 3 36 CMPS 200 4 ELECT. 1 CVSP 206 FRESHMAN CLASS OR EQUIVALENTa : NAME: Tel #: ID #: E-mail: @aub.edu.lb DIPLOMA TYPE : ENTRY

  16. COURSE OR OR CR. MATH 201f 3

    E-Print Network [OSTI]

    Shihadeh, Alan

    P.O.Box: CR. 30 COURSE OR OR CR. MATH 201f 3 MATH 210f 3 MATH 218 MATH 219 3 STAT 233f 3 STAT 234f 3 STAT 235f 3 STAT 236f 3 STAT 237f 3 STAT 238f 3 ELECT .1 3 ELECT .2 3 ELECT .3 3 36 CMPS 200 4 REQUIRMENTS FRESHMAN CLASS OR EQUIVALENTa : NAME: Tel #: ID #: MAY NOT ENROLL IN CVSP 203 OR 204 OR VICE VERSA

  17. COURSE OR OR CR. MATH 201g 3

    E-Print Network [OSTI]

    Shihadeh, Alan

    P.O.Box: CR. 30 COURSE OR OR CR. MATH 201g 3 MATH 210g 3 MATH 219 3 STAT 233g 3 STAT 234g 3 STAT 235g 3 STAT 236g 3 STAT 237g 3 STAT 238g 3 ELECT. 1 3 ELECT. 2 3 ELECT. 3 3 36 CMPS 200 4 ELECT. 1 3: Tel #: ID #: Total Credits in Major: E-mail: @aub.edu.lb DIPLOMA TYPE : ENTRY LEVEL: FR SO JR SR

  18. Clean Cities: Middle Tennessee Clean Fuels coalition

    Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (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 Delicious Rank EERE: Alternative Fuels Data Center Home PageEmerging FuelsRelated4 VehicleGeneseeIowaMiddle Tennessee

  19. Atom probe: a direct technique for kinetic measurements. [Fe-24Cr; Fe-32Cr; Fe-28. 5Cr-10. 6Co

    SciTech Connect (OSTI)

    Miller, M.K.; Brenner, S.S.; Camus, P.P.; Soffa, W.A.

    1984-04-04T23:59:59.000Z

    The atom probe has been used to study the phase transformations occurring within the low-temperature miscibility gaps in Fe-Cr and Fe-Cr-Co alloys. The morphology of the two-phase microstructure resulting from phase separation deep within the miscibility gaps was found to be highly interconnected and charactristic of an isotropic spinodal reaction. The characteristic dimensions of the microstructure and the changes in composition were measured as a function of aging. The coarsening of the network structures could be fitted with a power law with time exponents that were significantly less than the classical Lifshitz-Slyozov-Wagner value of one-third.

  20. Roles of Fe2+, Fe3+, and Cr3+ Surface Sites in the Oxidation...

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

    Fe3+, and Cr3+ Surface Sites in the Oxidation of NO on the (Fe,Cr)3O4(1 1 1) Surface Termination of an -(Fe,Cr Roles of Fe2+, Fe3+, and Cr3+ Surface Sites in the Oxidation of NO...

  1. BACHELOR OF ARTS IN GEOLOGY (UNOFFICIAL) CATALOG 129 Fall (Th-Pr) Cr Spring (Th-Pr) Cr

    E-Print Network [OSTI]

    BACHELOR OF ARTS IN GEOLOGY (UNOFFICIAL) CATALOG 129 Fall (Th-Pr) Cr Spring (Th-Pr) Cr Freshman Geology (3-3) 4 GEOL 106 Historical Geology (3-3) 4 MATH 166 Topics in Cont. Math II 1 (3-0) 3 MATH 131-3) 4 GEOP 341 Introduction to Global Geophysics (3-0) 3 GEOL 309 Introduction to Geologic Field Methods

  2. Characterization of the CR-39 neutron track etch dosimeter and evaluation of a combination CR-39/thermoluminescent dosimeter badge

    E-Print Network [OSTI]

    Hoover, Paul Steven

    1989-01-01T23:59:59.000Z

    . . . . . . . Objectives . THEORY 2 5 9 12 14 Charged Particle Interactions and Damage Track Formation Neutron Converters The Etching Process Background Effects The Quality Factor MATERIALS AND METHODS 14 16 18 21 22 31 CR-39 Supply . CR-39... effectiveness and used for calculating the dose equivalent (H) of exposed personnel, do not offer the same margin of safety for all radiations, including neutrons. The result is a proposed increase in applied Q values to assure comparable safety in all...

  3. AISES Final Intertribal Middle School Science Bowl

    SciTech Connect (OSTI)

    AISES, None

    2013-09-25T23:59:59.000Z

    The American Indian Science and Engineering Society (AISES) has been funded under a U.S. Department of Energy (DOE) grant (Grant Award No. DE-SC0004058) to host an Intertribal Middle-School Science and Math Bowl (IMSSMB) comprised of teams made up of a majority of American Indian students from Bureau of Indian Education-funded schools and public schools. The intent of the AISES middle school science and math bowl is to increase participation of American Indian students at the DOE-sponsored National Science Bowl. Although national in its recruitment scope, the AISES Intertribal Science and Math Bowl is considered a “regional” science bowl, equivalent to the other 50 regional science bowls which are geographically limited to states. Most regional bowls do not have American Indian student teams competing, hence the AISES bowl is meant to encourage American Indian student teams to increase their science knowledge in order to participate at the national level. The AISES competition brings together teams from various American Indian communities across the nation. Each team is provided with funds for travel to and from the event, as well as for lodging and meals. In 2011 and 2012, there were 10 teams participating; in 2013, the number of teams participating doubled to 20. Each Science and Math Bowl team is comprised of four middle school — grades 6 through 8 — students, one alternate, and a teacher who serves as advisor and coach — although in at least two cases, the coach was not a teacher, but was the Indian Education Coordinator. Each team member must have at least a 3.0 GPA. Furthermore, the majority of students in each team must be comprised of American Indian, Alaska Native or Native Hawaiian students. Under the current DOE grant, AISES sponsored three annual middle school science bowl competitions over the years 2011, 2012 and 2013. The science and math bowls have been held in late March concurrently with the National American Indian Science and Engineering Fair (NAISEF) and EXPO at the Albuquerque, NM Convention Center. Albuquerque is also the home of the AISES national office. The AISES staff also recruits volunteers to assist with implementation of the science and math bowl event. In 2011, there were 7 volunteers; in 2012, 15 volunteers, and in 2013, 19 volunteers. Volunteers are recruited from a variety of local sources, including Sandia Laboratories, Southwest Indian Polytechnic Institute students, Department of Defense, as well as family members of AISES staff. For AISES, the goals of the Intertribal Middle School Science and Math Bowl project are to have more Native students learn science, for them to gain confidence in competing, and to reward their effort in order to motivate them to pursue studies in the sciences and engineering. For DOE, the goals of the project are to get more Native students to compete at the National Science Bowl, held in Washington, DC.

  4. MIDDLE SNAKE SUBBASINS MANAGEMENT PLAN SUPPLEMENT PRIORITIZED IMPLEMENTATION

    E-Print Network [OSTI]

    MIDDLE SNAKE SUBBASINS MANAGEMENT PLAN SUPPLEMENT ­ PRIORITIZED IMPLEMENTATION NOVEMBER 24, 2004/Browsing..........................................................................................9 Key Limiting Factor #5: Water Quality............................................................................................................................11 Management Plan Considerations

  5. Stoller Middle School of Beaverton, Ore., emerges undefeated...

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

    Stoller-emerges-undefeated-at-BPAs-Middle-School-Science-Bowl Sign In About | Careers | Contact | Investors | bpa.gov Search News & Us Expand News & Us Projects & Initiatives...

  6. Middle School Regional Science Bowl Competition | Argonne National...

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

    Coach's Resources Registration Middle School Electric Car Competition High School Rube Goldberg Teacher Programs Classroom Resources Additional Information For more information...

  7. Virginia, Maryland teams prepare for Regional Middle School Science...

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

    Virginia, Maryland teams prepare for Regional Middle School Science Bowl March 3, 2005 The Department of Energy's Jefferson Lab, in Newport News, Va., hosts the VirginiaMaryland...

  8. Fission track evidence for widespread early to Middle miocene...

    Open Energy Info (EERE)

    and Range province Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Proceedings: Fission track evidence for widespread early to Middle miocene...

  9. Middle Tennessee EMC- Residential Energy Efficiency Rebate Program

    Broader source: Energy.gov [DOE]

    Middle Tennessee Electric Membership Corporation (MTEMC) and the Tennessee Valley Authority (TVA) offer incentives for residential customers through the In-Home Energy Evaluation Program. This...

  10. Henderson County North Middle School wins 2015 DOE West Kentucky...

    Energy Savers [EERE]

    students' knowledge in all areas of science, including biology, chemistry, Earth science, physics, energy, and math. Middle school student teams consist of four students,...

  11. Effect of the magnetic phase transition on the charge transport in layered semiconductor ferromagnets TlCrS{sub 2} and TlCrSe{sub 2}

    SciTech Connect (OSTI)

    Veliyev, R. G.; Sadikhov, R. Z.; Kerimova, E. M., E-mail: ekerimova@physics.ab.az; Asadov, Yu. G.; Jabbarov, A. I. [Azerbaijan National Academy of Sciences, Institute of Physics (Azerbaijan)

    2009-09-15T23:59:59.000Z

    TlCrS{sub 2} and TlCrSe{sub 2} crystals were synthesized by solid-state reaction. X-ray diffraction analysis showed that TlCrS{sub 2} and TlCrSe{sub 2} compounds crystallize in the hexagonal crystal system with lattice parameters a = 3.538 A, c = 21.962 A, c/a {approx} 6.207, z = 3; a = 3.6999 A, c = 22.6901 A, c/a {approx} 6.133, z = 3; and X-ray densities {rho}{sub x} = 6.705 and 6.209 g/cm{sup 3}, respectively. Magnetic and electric studies in a temperature range of 77-400 K showed that TlCrS{sub 2} and TlCrSe{sub 2} are semiconductor ferromagnets. Rather large deviations of the experimental effective magnetic moment of TlCrS{sub 2} (3.26 {mu}{sub B}) and TlCrSe{sub 2} (3.05 {mu}{sub B}) from the theoretical one (3.85 {mu}{sub B}) are attributed to two-dimensional magnetic ordering in the paramagnetic region of strongly layered ferromagnets TlCrS{sub 2} and TlCrSe{sub 2}. The effect of the magnetic phase's transition on the charge transport in TlCrS{sub 2} and TlCrSe{sub 2} is detected.

  12. Middle East: Slow year on the Gulf

    SciTech Connect (OSTI)

    Not Available

    1986-08-01T23:59:59.000Z

    This article surveys the petroleum outlook in the Middle East area. Observations include: Saudi Arabia's money crunch continues to keep the lid on exploration, production work; Abu Dhabi has also curtailed operations because of low oil prices, reduced budgets; Followup drilling has been disappointing around recent gas strikes in Sharjah, Dubai; Oman's aggressive EandP program will result in a 30% drilling increase this year; Kuwait isn't slowing down its development of light oil either; the goal is 40 new wells; Iran and Iraq are still boosting export capacities despite attacks on oil facilities; North Yemen's Alief field is a major find. Numerous structures remain to be drilled; Syria, Bahrain have development projects underway. Turkey is attracting U.S. majors.

  13. Grain boundary depletion and migration during selective oxidation of Cr in a Ni-5Cr binary alloy exposed to high-temperature hydrogenated water

    SciTech Connect (OSTI)

    Schreiber, Daniel K.; Olszta, Matthew J.; Bruemmer, Stephen M.

    2014-10-15T23:59:59.000Z

    High-resolution microscopy of a high-purity Ni-5Cr alloy exposed to 360°C hydrogenated water reveals intergranular selective oxidation of Cr accompanied by local Cr depletion and diffusion-induced grain boundary migration (DIGM). The corrosion-product oxide consists of a porous, interconnected network of Cr2O3 platelets with no further O ingress into the metal ahead. Extensive grain boundary depletion of Cr (to <0.05at.%) is observed typically 20–100 nm wide as a result of DIGM and reaching depths of many micrometers beyond the oxidation front.

  14. Andrew S. Hein Chapter 4 Middle Pleistocene glaciation in

    E-Print Network [OSTI]

    Andrew S. Hein 89 Chapter 4 Middle Pleistocene glaciation in Patagonia dated by cosmogenic in Patagonia dated by cosmogenic-nuclide measurements on outwash gravels. Earth and Planetary Science Letters measurements. #12;Middle Pleistocene glaciation in Patagonia dated by cosmogenic-nuclide measurements... 90

  15. argentina middle jurassic: Topics by E-print Network

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

    argentina middle jurassic First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Middle Jurassic stratigraphy...

  16. Supernova 1996cr: SN 1987A's Wild Cousin?

    E-Print Network [OSTI]

    F. E. Bauer; V. V. Dwarkadas; W. N. Brandt; S. Immler; S. Smartt; N. Bartel; M. F. Bietenholz

    2008-05-06T23:59:59.000Z

    We report on new VLT optical spectroscopic and multi-wavelength archival observations of SN1996cr, a previously identified ULX known as Circinus Galaxy X-2. Our optical spectrum confirms SN1996cr as a bona fide type IIn SN, while archival imaging isolates its explosion date to between 1995-02-28 and 1996-03-16. SN1996cr is one of the closest SNe (~3.8 Mpc) in the last several decades and in terms of flux ranks among the brightest radio and X-ray SNe ever detected. The wealth of optical, X-ray, and radio observations that exist for this source provide relatively detailed constraints on its post-explosion expansion and progenitor history, including an preliminary angular size constaint from VLBI. The archival X-ray and radio data imply that the progenitor of SN1996cr evacuated a large cavity just prior to exploding: the blast wave likely expanded for ~1-2 yrs before eventually striking the dense circumstellar material which surrounds SN1996cr. The X-ray and radio emission, which trace the progenitor mass-loss rate, have respectively risen by a factor of ~2 and remained roughly constant over the past 7 yr. This behavior is reminiscent of the late rise of SN1987A, but 1000 times more luminous and much more rapid to onset. Complex Oxygen line emission in the optical spectrum further hints at a possible concentric shell or ring-like structure. The discovery of SN1996cr suggests that a substantial fraction of the closest SNe observed in the last several decades have occurred in wind-blown bubbles. An Interplanetary Network position allows us to reject a tentative GRB association with BATSE 4B960202. [Abridged

  17. COURSE or or CR. MATH 201e 3

    E-Print Network [OSTI]

    Shihadeh, Alan

    P.O.Box: CR. 30 COURSE or or CR. MATH 201e 3 MATH 210e 3 MATH 218 MATH 219 3 STAT 233e 3 STAT 234e 3 STAT 235e 3 STAT 236e 3 STAT 237e 3 STAT 238e 3 ELECT .1 3 ELECT .2 3 ELECT .3 3 36 ELECT. 1 3 3 or any 207 (A,B,C...) TOTAL CREDITS NEEDED for GRADUATION HUMANITIES LIST I OR IIc ,f ID #: E-mail: @aub

  18. Nitrate Enhanced Microbial Cr(VI) Reduction-Final Report

    SciTech Connect (OSTI)

    John F. Stolz

    2011-06-15T23:59:59.000Z

    A major challenge for the bioremediation of radionuclides (i.e., uranium, technetium) and metals (i.e., Cr(VI), Hg) is the co-occurrence of nitrate as it can inhibit metal transformation. Denitrification (nitrate reduction to dinitrogen gas) is considered the most important ecological process. For many metal and metalloid reducing bacteria, however, ammonia is the end product through respiratory nitrate reduction (RNRA). The focus of this work was to determine how RNRA impacts Cr(VI) transformation. The goal was to elucidate the specific mechanism(s) that limits Cr(VI) reduction in the presence of nitrate and to use this information to develop strategies that enhance Cr(VI) reduction (and thus detoxification). Our central hypothesis is that nitrate impacts the biotransformation of metals and metalloids in three ways 1) as a competitive alternative electron acceptor (inhibiting transformation), 2) as a co-metabolite (i.e., concomitant reduction, stimulating transformation), and 3) as an inducer of specific proteins and pathways involved in oxidation/reduction reactions (stimulating transformation). We have identified three model organisms, Geobacter metallireducens (mechanism 1), Sulfurospirillum barnesii, (mechasism 2), and Desulfovibrio desulfuricans (mechanisms 3). Our specific aims were to 1) investigate the role of Cr(VI) concentration on the kinetics of both growth and reduction of nitrate, nitrite, and Cr(VI) in these three organisms; 2) develop a profile of bacterial enzymes involved in nitrate transformation (e.g., oxidoreductases) using a proteomic approach; 3) investigate the function of periplasmic nitrite reductase (Nrf) as a chromate reductase; and 4) develop a strategy to maximize microbial chromium reduction in the presence of nitrate. We found that growth on nitrate by G. metallireducens was inhibited by Cr(VI). Over 240 proteins were identified by LC/MS-MS. Redox active proteins, outer membrane heavy metal efflux proteins, and chemotaxis sensory proteins (Gmet_2478 and Gmet_1641) were up-regulated with exposure to Cr(VI). A nine-heme cytochrome C was purified that could reduce nitrite and could be oxidized by Cr(VI). For D. desulfuricans, we found that confirmed that Cr(VI) induced a prolonged lag period when Cr(VI) was reduced. Over three hundred proteins were unequivocally identified by LC/MS-MS and a significant number of down-regulated proteins for which the levels were changed >2 fold compared to control. Sulfite reductase levels were similar, however, nitrate and nitrite reductase were down-regulated. The supernatant of spent cultures was found to contain a filterable, heat stable compound that rapidly reduced Cr(VI). In addition, desulfoviridin was purified from nitrate grown cells and shown to have nitrite reductase activity that was inhibited by Cr(VI). For S. barnesii, periplasmic nitrate reductase (Nap), nitrite reductase (Nrf), and the metalloid reductase (Rar) were purified and characterized. The supernatant of spent cultures was also found to contain a filterable, heat stable compound that rapidly reduced Cr(VI) but that Rar also reduced Cr(VI). Our results from specific aims 1 through 3 indicate that for G. metallireducens, Cr(VI) inhibits nitrate respiration as it oxidizes cytochromes involved in nitrate respiration. Iron reduction is apparently not affected and the inhibitory affects of Cr(VI) may be attenuated by the addition of sufficient Fe(III) to generate Fe(II) that abiotically reduces the chromium. For S. barnesii, although the enzyme assays indicate that the components of the respiratory pathway for nitrate (e.g. Nap and Nrf) are inhibited by chromate, the organism has a mechanism to prevent this from actually occurring. Our current hypothesis is that the non-specific metalloid reductase (Rar) is providing resistance by reducing the Cr(VI). The strategy here would be to enhance its growth and metabolism in the natural setting. Lactate is a suitable electron donor for S. barnesii but other donors are possible. Although the version of the Phylochip used for monitoring the microb

  19. Structural relaxation around substitutional Cr3+ in pyrope garnet

    E-Print Network [OSTI]

    the spinel- garnet transformation -a major phase boundary in the Earth's upper mantle- to pressures as high shells of neighbors (Mg and Si) relax only partially. Site relaxation is accommodated by strain diamonds (Irifune et al. 1982). In the garnet structure (Novak and Gibbs 1971), Cr3+ is small enough

  20. Aquatic Chemistry Course Id: CHEM 605 (3 cr.)

    E-Print Network [OSTI]

    Wagner, Diane

    Aquatic Chemistry Fall 2010 Course Id: CHEM 605 (3 cr.) Lecture: TR 3:40-5:20pm, REIC 165 of this course is to introduce students to the concepts and models used in aquatic chemistry while providing-base chemistry, complexation, precipitation-dissolution and reduction-oxidation reactions. Student Learning

  1. Thermal stability and oxidation resistance of TiCrAlYO coatings...

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

    stability and oxidation resistance of TiCrAlYO coatings on SS430 for solid oxide fuel cell interconnect applications. Thermal stability and oxidation resistance of TiCrAlYO...

  2. Reduction of Health Risks Due to Chromium(VI)Using Mesquite: A Potential Cr Phytoremediator

    SciTech Connect (OSTI)

    Gardea-Torresdey, Jorge L.; Aldrich, Mary V.; Peralta-Videa, Jose R.; Parsons, Jason G.

    2004-03-29T23:59:59.000Z

    Chromium is a transition metal extensively used in industry. Cr mining and industrial operations account for chromium wastes at Superfund sites in the United States. A study was performed to investigate the possibility of using mesquite (Prosopis spp.), which is an indigenous desert plant species, to remove Cr from contaminated sites. In this study, mesquite plants were grown in an agar-based medium containing 75 mg L-1 and 125 mg L-1 of Cr(VI). The Cr content of leaf tissue (992 mg kg-1 of dry weight, from 125 mg L-1 of Cr(VI)) indicated that mesquite could be classified as a chromium hyperaccumulator. X-ray absorption spectroscopy (XAS) studies performed to experimental samples showed that mesquite roots absorbed some of the supplied Cr(VI). However, the data analyses of plant tissues demonstrated that the absorbed Cr(VI) was fully reduced to Cr(III) in the leaf tissue.

  3. Surface structure of ?-Cr2O3(0001) after activated oxygen...

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

    Surface structure of ?-Cr2O3(0001) after activated oxygen exposure. Surface structure of ?-Cr2O3(0001) after activated oxygen exposure. Abstract: The surface structure...

  4. Growth of Cr-doped TiO Films in the Rutile and Anatase Structures...

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

    of Cr-doped TiO Films in the Rutile and Anatase Structures by Oxygen Plasma Assisted Molecular Beam Epitaxy . Growth of Cr-doped TiO Films in the Rutile and Anatase Structures by...

  5. Excited Carrier Dynamics of ?-Cr2O3/?-Fe2O3 Core...

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

    Excited Carrier Dynamics of ?-Cr2O3?-Fe2O3 Core-Shell Nanostructures. Abstract: In this work ?-Cr2O3?-Fe2O3 core-shell polycrystalline...

  6. Integrated Ecogenomics Study for Bioremediation of Cr(VI) at Hanford 100H Area

    E-Print Network [OSTI]

    Chakraborty, Romy

    2008-01-01T23:59:59.000Z

    reducer isolated from the Hanford 100H site capable of Iron(study for bioremediation of Cr(VI) at Hanford 100H area RomyVI)contamination at Hanford ?? Cr(VI) highly soluble, toxic

  7. School as Classificatory Machine: Sorting, Socialization, and Class in a Japanese Middle School

    E-Print Network [OSTI]

    Park, Jeehwan

    2011-01-01T23:59:59.000Z

    Reinvigorating Public Middle Schools). Tokyo: Y?shind?.Sh?bun, Middle School 2000 Gakk? Ky?ikuJimu Shiry? (Document for School Education). 2008 Sh?bunch?

  8. Lightest Isotope of Bh Produced Via the 209Bi(52Cr,n)260Bh Reaction

    E-Print Network [OSTI]

    2007-01-01T23:59:59.000Z

    models. For many years, “cold fusion” reactions utilizingproduced via the new “cold fusion” reaction 209 Bi( 52 Cr,

  9. Radiation effects on interface reactions of U/Fe, U/(Fe + Cr), and U/(Fe + Cr + Ni)

    SciTech Connect (OSTI)

    KUn Shao; Di Chen; Chaochen Wei; Michael S. Martin; Xuemei Wang; Youngjoo Park; Ed Dein; Kevin R. Coffey; b , Yongho Sohn; Bulent H. Sencer; J. Rory Kennedy

    2014-09-01T23:59:59.000Z

    We study the effects of radiation damage on interdiffusion and intermetallic phase formation at the interfaces of U/Fe, U/(Fe + Cr), and U/(Fe + Cr + Ni) diffusion couples. Magnetron sputtering is used to deposit thin films of Fe, Fe + Cr, or Fe + Cr + Ni on U substrates to form the diffusion couples. One set of samples are thermally annealed under high vacuum at 450 C or 550 C for one hour. A second set of samples are annealed identically but with concurrent 3.5 MeV Fe++ ion irradiation. The Fe++ ion penetration depth is sufficient to reach the original interfaces. Rutherford backscattering spectrometry analysis with high fidelity spectral simulations is used to obtain interdiffusion profiles, which are used to examine differences in U diffusion and intermetallic phase formation at the buried interfaces. For all three diffusion systems, Fe++ ion irradiations enhance U diffusion. Furthermore, the irradiations accelerate the formation of intermetallic phases. In U/Fe couples, for example, the unirradiated samples show typical interdiffusion governed by Fick’s laws, while the irradiated ones show step-like profiles influenced by Gibbs phase rules.

  10. Non-classical nuclei and growth kinetics of Cr precipitates in FeCr alloys during ageing

    SciTech Connect (OSTI)

    Li, Yulan; Hu, Shenyang Y.; Zhang, Lei; Sun, Xin

    2014-01-10T23:59:59.000Z

    In this manuscript, we quantitatively calculated the thermodynamic properties of critical nuclei of Cr precipitates in FeCr alloys. The concentration profiles of the critical nuclei and nucleation energy barriers were predicted by the constrained shrinking dimer dynamics (CSDD) method. It is found that Cr concentration distribution in the critical nuclei strongly depend on the overall Cr concentration as well as temperature. The critical nuclei are non-classical because the concentration in the nuclei is smaller than the thermodynamic equilibrium value. These results are in agreement with atomic probe observation. The growth kinetics of both classical and non-classical nuclei was investigated by the phase field approach. The simulations of critical nucleus evolution showed a number of interesting phenomena: 1) a critical classical nucleus first shrinks toward its non-classical nucleus and then grows; 2) a non-classical nucleus has much slower growth kinetics at its earlier growth stage compared to the diffusion-controlled growth kinetics. 3) a critical classical nucleus grows faster at the earlier growth stage than the non-classical nucleus. All of these results demonstrate that it is critical to introduce the correct critical nuclei in order to correctly capture the kinetics of precipitation.

  11. austenitnoj cr-mn stali: Topics by E-print Network

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

    cr-mn stali First Page Previous Page 1 2 3 4 5 6 Next Page Last Page Topic Index 1 Cavitation erosion of laser processed Fe-Cr-Mn and Fe-Cr-Co alloys CiteSeer Summary: Received...

  12. High coercivity CoCrPt films achieved by post-deposition rapid thermal annealing

    E-Print Network [OSTI]

    Laughlin, David E.

    layer, a CoCrPt mag- netic layer, a capping Mn diffusion layer, and a final CrTi oxidation protection conditions were stud- ied. II. EXPERIMENT All layers were deposited onto glass substrates by rf di- ode, and CrTi oxida- tion protection layer were all 200 Ã? thick. Post-deposition annealing was performed

  13. Surface half-metallicity of CrS thin films and perfect spin filtering and spin diode effects of CrS/ZnSe heterostructure

    SciTech Connect (OSTI)

    Gao, G. Y., E-mail: guoying-gao@mail.hust.edu.cn; Yao, K. L., E-mail: klyao@mail.hust.edu.cn [School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074 (China)

    2014-11-03T23:59:59.000Z

    Recently, ferromagnetic zinc-blende Mn{sub 1?x}Cr{sub x}S thin films (above x?=?0.5) were fabricated experimentally on ZnSe substrate, which confirmed the previous theoretical prediction of half-metallic ferromagnetism in zinc-blende CrS. Here, we theoretically reveal that both Cr- and S-terminated (001) surfaces of the CrS thin films retain the half-metallicity. The CrS/ZnSe(001) heterogeneous junction exhibits excellent spin filtering and spin diode effects, which are explained by the calculated band structure and transmission spectra. The perfect spin transport properties indicate the potential applications of half-metallic CrS in spintronic devices. All computational results are obtained by using the density functional theory combined with nonequilibrium Green's function.

  14. Middle Schoolers Face-Off in Model Car Challenge

    Broader source: Energy.gov [DOE]

    Forty-four teams entered the middle school Lithium-Ion Battery Powered Model Car Competition, and two teams distinguished themselves, one for speed and the other for design.

  15. Record 18 teams prepare for Virginia Regional Middle School Science...

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

    of Energy's Jefferson Lab, in Newport News, Va., hosts the Virginia Regional Middle School Science Bowl on Saturday, March 10, with a record 18 teams competing. This is the...

  16. Beaumont Middle School Design Project April May 2014

    E-Print Network [OSTI]

    Lee, Carl

    1 Beaumont Middle School Design Project April ­ May 2014 Carl Lee and Craig Schroeder #12;2 SketchUp 1. SketchUp is free, and you can download it from the website www.sketchup.com. For some K12 use, see www.sketchup.com/3Dfor/k12-education. 2. For some student work from Jessie Clark Middle School

  17. Grain boundary migration induced segregation in V-Cr-Ti alloys

    SciTech Connect (OSTI)

    Gelles, D.S. [Pacific Northwest National Lab., Richland, WA (United States); Ohnuki, S.; Takahashi, H. [Univ. of Hokkaido (Japan)

    1996-10-01T23:59:59.000Z

    Analytical electron microscopy results are reported for a series of vanadium alloys irradiated in the HFIR JP23 experiment at 500{degrees}C. Alloys were V-5Cr-5Ti and pure vanadium which are expected to have transmuted to V-15Cr-5Ti and V-10Cr following irradiation. Analytical microscopy confirmed the expected transmutation occurred and showed redistribution of Cr and Ti resulting from grain boundary migration in V-5Cr-5Ti, but in pure V, segregation was reduced and no clear trends as a function of position near a boundary were identified.

  18. Partially filled intermediate band of Cr-doped GaN films

    SciTech Connect (OSTI)

    Sonoda, S. [Department of Electronics, Kyoto Institute of Technology, Kyoto 606-8585 (Japan)

    2012-05-14T23:59:59.000Z

    We investigated the band structure of sputtered Cr-doped GaN (GaCrN) films using optical absorption, photoelectron yield spectroscopy, and charge transport measurements. It was found that an additional energy band is formed in the intrinsic band gap of GaN upon Cr doping, and that charge carriers in the material move in the inserted band. Prototype solar cells showed enhanced short circuit current and open circuit voltage in the n-GaN/GaCrN/p-GaN structure compared to the GaCrN/p-GaN structure, which validates the proposed concept of an intermediate-band solar cell.

  19. Cr{sub 2}Nb-based alloy development

    SciTech Connect (OSTI)

    Liu, C.T.; Horton, J.A.; Carmichael, C.A.

    1996-05-01T23:59:59.000Z

    This paper summarizes recent progress in developing Cr{sub 2}Nb/Cr(Nb) alloys for structural use in advanced fossil energy conversion systems. Alloy additions were added to control the microstructure and mechanical properties. Two beneficial elements have been identified among all alloying additions added to the alloys. One element is effective in refining the coarse eutectic structure and thus substantially improves the compressive strength and ductility of the alloys. The other element enhances oxidation resistance without sacrificing the ductility. The tensile properties are sensitive to cast defects, which can not be effectively reduced by HIPping at 1450-1580{degrees}C and/or directionally solidifying via a floating zone remelting method.

  20. Gestion d'un cache Loris Marchal CR08 ordonnancement

    E-Print Network [OSTI]

    Marchal, Loris

    Gestion d'un cache Loris Marchal ­ CR08 ordonnancement 30 novembre 2011 1 Introduction On s'int´eresse au probl`eme de la gestion d'une m´emoire temporaire, couramment ap- pel´ee cache. Plut^ot qu´etitivit´e On consid`ere le cas offline, c'est-`a-dire qu'on conna^it `a l'avance toute la s´equence des requ

  1. Gestion d'un cache Loris Marchal CR07 ordonnancement

    E-Print Network [OSTI]

    Marchal, Loris

    Gestion d'un cache Loris Marchal ­ CR07 ordonnancement 17 d´ecembre 2012 1 Introduction On s'int´eresse au probl`eme de la gestion d'une m´emoire temporaire, couramment ap- pel´ee cache. Plut^ot qu´etitivit´e On consid`ere le cas offline, c'est-`a-dire qu'on conna^it `a l'avance toute la s´equence des requ

  2. Improving thermostability of CrO{sub 2} thin films by doping with Sn

    SciTech Connect (OSTI)

    Ding, Yi; Wang, Ziyu; Liu, Shuo; Shi, Jing; Yin, Di, E-mail: dyin@whu.edu.cn [Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072 (China); Yuan, Cheng; Lu, Zhihong, E-mail: zludavid@live.com [School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081 (China); Xiong, Rui, E-mail: xiongrui@whu.edu.cn [Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072 (China); Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Wuhan 430062 (China)

    2014-09-01T23:59:59.000Z

    Chromium dioxide (CrO{sub 2}) is an ideal material for spin electronic devices since it has almost 100% spin polarization near Fermi level. However, it is thermally unstable and easily decomposes to Cr{sub 2}O{sub 3} even at room temperature. In this study, we try to improve the thermal stability of CrO{sub 2} thin films by doping with Sn whose oxide has the same structure as CrO{sub 2}. High quality epitaxial CrO{sub 2} and Sn-doped CrO{sub 2} films were grown on single crystalline TiO{sub 2} (100) substrates by chemical vapor deposition. Sn{sup 4+} ions were believed to be doped into CrO{sub 2} lattice and take the lattice positions of Cr{sup 4+}. The magnetic measurements show that Sn-doping leads to a decrease of magnetocrystalline anisotropy. The thermal stabilities of the films were evaluated by annealing the films at different temperatures. Sn-doped films can withstand a temperature up to 510?°C, significantly higher than what undoped films can do (lower than 435?°C), which suggests that Sn-doping indeed enhances the thermal stability of CrO{sub 2} films. Our study also indicates that Sn-doping may not change the essential half metallic properties of CrO{sub 2}. Therefore, Sn-doped CrO{sub 2} is expected to be very promising for applications in spintronic devices.

  3. Long-term corrosion of Cr-Mo steels in superheated steam at 482 and 538/sup 0/C. [21/4 Cr-1 Mo; 9 Cr-1 Mo; Sumitomo 9 Cr-2 Mo; Sandvik HT-9

    SciTech Connect (OSTI)

    Griess, J.C.; DeVan, J.H.; Maxwell, W.A.

    1980-01-01T23:59:59.000Z

    The corrosion of several Cr-Mo ferritic steels was investigated in superheated steam at an operating power plant. Tests were conducted at 482 and 538/sup 0/C (900 and 1000/sup 0/F) in a once-through loop for times up to 28,000 h. Chromium concentrations ranged from 2.0 to 11.3%, and the effect of surface preparation on corrosion was investigated. Only one of many specimens showed evidence of exfoliation at 482/sup 0/C, but at 538/sup 0/C exfoliation occurred on at least some of the specimens of most materials; the exceptions were the alloy with the highest chromium content (Sandvik HT-9), one heat of 9 Cr-1 Mo steel with the highest silicon content, and Sumitomo 9 Cr-2 Mo steel, which was in test for only 19,000 h. Parabolic oxidation kinetics adequately described the corrosion process for about the first year, after which corrosion rates were constant and lower than predicted from extrapolation of the initial part of the penetration versus time curves. With chromium concentrations between 2 and 9%, corrosion behavior was independent of chromium content, and corrosion was only slightly less with Sandvik HT-9. Corrosion was nearly independent of surface preparation, but in two cases the presence of mill scale on the surface prior to steam exposure seemed to retard oxidation in steam. 11 figures, 5 tables.

  4. Global Threat Reduction Initiative Africa and Middle East Project Plan 2012

    SciTech Connect (OSTI)

    Jamison, Jeremy D.

    2012-02-01T23:59:59.000Z

    GTRI Africa and Middle East Project Plan submitted for school project to American Graduate University.

  5. Room Temperature, Intrinsic Vacancy Mediated Ferromagnetism in Cr:Ga2Se3/Si E. N. Yitamben,1,

    E-Print Network [OSTI]

    Olmstead, Marjorie

    Room Temperature, Intrinsic Vacancy Mediated Ferromagnetism in Cr:Ga2Se3/Si E. N. Yitamben,1, T. C of 4 µB/Cr. The intrinsic- vacancy structure of defected-zinc-blende -Ga2Se3 enables Cr incorporation, as well as strong overlap between Cr 3d states and the Se 4p states lining the intrinsic vacancy rows, ob

  6. Low-cost, highly efficient, and tunable ultrafast laser technology based on directly diode-pumped Cr:Colquiriites

    E-Print Network [OSTI]

    Demirbas, Umit

    2010-01-01T23:59:59.000Z

    This doctoral project aims to develop robust, ultra low-cost ($5,000-20,000), highly-efficient, and tunable femtosecond laser technology based on diode-pumped Cr:Colquiriite gain media (Cr:LiCAF, Cr3+:LiSAF and Cr:LiSGaF). ...

  7. MgO seed layers for CoCrPt/Cr longitudinal magnetic recording media Li-Lien Lee, B. K. Cheong,a)

    E-Print Network [OSTI]

    Laughlin, David E.

    MgO seed layers for CoCrPt/Cr longitudinal magnetic recording media Li-Lien Lee, B. K. Cheong,a) D, the industry is still in the process of search- ing for a better seed layer. MgO is an ionic crystal that has

  8. Vibronic spectroscopy of unsaturated transition metal complexes: CrC2H, CrCH3 , and NiCH3

    E-Print Network [OSTI]

    Morse, Michael D.

    to characterize diatomic transition metal oxides, nitrides, and carbides.8­22 In addition to these pure metallicVibronic spectroscopy of unsaturated transition metal complexes: CrC2H, CrCH3 , and NiCH3 Dale J investigation of small transition metal clusters and organo- metallic radicals is that these species serve

  9. Soft zone formation in dissimilar welds between two Cr-Mo steels

    SciTech Connect (OSTI)

    Albert, S.K.; Gill, T.P.S.; Tyagi, A.K.; Mannan, S.L.; Rodriguez, P. [Indira Gandhi Centre for Atomic Research, Kalpakkam (India); Kulkarni, S.D. [Indian Inst. of Tech., Bombay (India)

    1997-03-01T23:59:59.000Z

    Two dissimilar weldments between 9Cr-1Mo and 2.25Cr-1Mo ferritic steels have been characterized for their microstructural stability during various postweld heat treatments (PWHTs). The samples for the investigation were extracted from bead-on-plate weldments made by depositing 2.25Cr-1Mo weld metal on 9Cr-1Mo base plate and vice versa. Subsequent application of PWHT resulted in the formation of a soft zone in the low Cr ferritic steel weld or base plate. A carbide-rich hard zone, adjoining the soft zone, was also detected in the high Cr side of the weldment. Unmixed zones in the weld metal provided additional soft and hard zones in the weld metals. The migration of carbon from low-Cr steel to high-Cr steel, driven by the carbon activity gradient, has been shown to be responsible for the formation of soft and hard zones. A carbon activity diagram for 2.25Cr-1Mo/9Cr-1Mo weldments has been proposed to aid in the selection of welding consumables for reducing or preventing the soft zone formation.

  10. Microstructural analyses of Cr(VI) speciation in chromite ore processing Residue (COPR)

    SciTech Connect (OSTI)

    CHRYSOCHOOU, MARIA; FAKRA, SIRINE C .; Marcus, Matthew A.; Moon, Deok Hyun; Dermatas, Dimitris

    2010-03-01T23:59:59.000Z

    The speciation and distribution of Cr(VI) in the solid phase was investigated for two types of chromite ore processing residue (COPR) found at two deposition sites in the United States: gray-black (GB) granular and hard brown (HB) cemented COPR. COPR chemistry and mineralogy were investigated using micro-X-ray absorption spectroscopy and micro-X-ray diffraction, complemented by laboratory analyses. GB COPR contained 30percent of its total Cr(VI) (6000 mg/kg) as large crystals(>20 ?m diameter) of a previously unreported Na-rich analog of calcium aluminum chromate hydrates. These Cr(VI)-rich phases are thought to be vulnerable to reductive and pH treatments. More than 50percent of the Cr(VI) was located within nodules, not easily accessible to dissolved reductants, and bound to Fe-rich hydrogarnet, hydrotalcite, and possibly brucite. These phases are stable over a large pH range, thus harder to dissolve. Brownmilleritewasalso likely associated with physical entrapment of Cr(VI) in the interior of nodules. HB COPR contained no Cr(VI)-rich phases; all Cr(VI) was diffuse within the nodules and absent from the cementing matrix, with hydrogarnet and hydrotalcite being the main Cr(VI) binding phases. Treatment ofHBCOPRis challenging in terms of dissolving the acidity-resistant, inaccessible Cr(VI) compounds; the same applies to ~;;50percent of Cr(VI) in GB COPR.

  11. Oil and gas developments in Middle East in 1986

    SciTech Connect (OSTI)

    Hemer, D.O.; Gohrbandt, K.H.A.

    1987-10-01T23:59:59.000Z

    Petroleum production in Middle East countries during 1986 totaled 4,493,973,000 bbl (an average rate of 12,312,254 BOPD), up 22.3% from the revised 1985 total of 3,673,729,000 bbl. Iraq, Kuwait, Saudi Arabia, Abu Dhabi, and Oman had significant increased; Iran was the only Middle East country with a significant decrease. New fields went on production in Oman and Yemen Arab Republic, and significant discoveries were reported in Iraq, Yemen Arab Republic, Oman, and Syria. However, exploration was generally down in most countries. Exploration and production operations continued to be affected by war in Iraq and Iran. 8 figures, 7 tables.

  12. Improved oxidation sulfidation resistance of Fe-Cr-Ni alloys

    DOE Patents [OSTI]

    Natesan, K.; Baxter, D.J.

    1983-07-26T23:59:59.000Z

    High temperature resistance of Fe-Cr-Ni alloy compositions to oxidative and/or sulfidative conditions is provided by the incorporation of about 1 to 8 wt % of Zr or Nb and results in a two-phase composition having an alloy matrix as the first phase and a fine grained intermetallic composition as the second phase. The presence and location of the intermetallic composition between grains of the matrix provides mechanical strength, enhanced surface scale adhesion, and resistance to corrosive attack between grains of the alloy matrix at temperatures of 500 to 1000/sup 0/C.

  13. Oxidation sulfidation resistance of Fe-Cr-Ni alloys

    DOE Patents [OSTI]

    Natesan, Ken (Naperville, IL); Baxter, David J. (Woodridge, IL)

    1984-01-01T23:59:59.000Z

    High temperature resistance of Fe-Cr-Ni alloy compositions to oxidative and/or sulfidative conditions is provided by the incorporation of about 1-8 wt. % of Zr or Nb and results in a two-phase composition having an alloy matrix as the first phase and a fine grained intermetallic composition as the second phase. The presence and location of the intermetallic composition between grains of the matrix provides mechanical strength, enhanced surface scale adhesion, and resistance to corrosive attack between grains of the alloy matrix at temperatures of 500.degree.-1000.degree. C.

  14. SF6432-CR (02-01-13) Cost Reimbursement

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORT SANDSDNTM (04-95)7/31/137/31/13 PageCR

  15. The response of CR-39 nuclear track detector to 1–9 MeV protons

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

    Sinenian, N.; Rosenberg, M. J.; Manuel, M.; McDuffee, S. C.; Casey, D. T.; Zylstra, A. B.; Rinderknecht, H. G.; Gatu Johnson, M.; Séguin, F. H.; Frenje, J. A.; Li, C. K.; Petrasso, R. D.

    2011-10-28T23:59:59.000Z

    The response of CR-39 nuclear track detector (TasTrak®) to protons in the energy range of 0.92–9.28 MeV has been studied. Previous studies of the CR-39 response to protons have been extended by examining the piece-to-piece variability in addition to the effects of etch time and etchant temperature; it is shown that the shape of the CR-39 response curve to protons can vary from piece-to-piece. Effects due to the age of CR-39 have also been studied using 5.5 MeV alpha particles over a 5-year period. Track diameters were found to degrade with the age of the CR-39 itself rather than the age of the tracks, consistent with previous studies utilizing different CR-39 over shorter time periods.

  16. Bulk and track etch properties of CR-39 SSNTD etched in NaOH/ethanol

    E-Print Network [OSTI]

    Yu, K.N.

    Bulk and track etch properties of CR-39 SSNTD etched in NaOH/ethanol K.F. Chan, F.M.F. Ng, D. described the use of NaOH/ethanol as an etchant for the CR-39 detector, and have determined the corre and track etch properties of CR- 39 in NaOH/ethanol were derived from direct measurements. The bulk etch

  17. CORROSION OF Fe-10Al-Cr ALLOYS BY COAL CHAR

    E-Print Network [OSTI]

    Gordon, B.A.

    2011-01-01T23:59:59.000Z

    off-gas from a typical gasifier contains large percentagesIOAl-Cr alloys at coal-gasifier This FeS and CaS0 operating

  18. Proton spectroscopy of 48Ni, 46Fe, and 44Cr

    E-Print Network [OSTI]

    M. Pomorski; M. Pfützner; W. Dominik; R. Grzywacz; A. Stolz; T. Baumann; J. S. Berryman; H. Czyrkowski; R. D?browski; A. Fija?kowska; T. Ginter; J. Johnson; G. Kami?ski; N. Larson; S. N. Liddick; M. Madurga; C. Mazzocchi; S. Mianowski; K. Miernik; D. Miller; S. Paulauskas; J. Pereira; K. P. Rykaczewski; S. Suchyta

    2014-07-06T23:59:59.000Z

    Results of decay spectroscopy on nuclei in vicinity of the doubly magic 48Ni are presented. The measurements were performed with a Time Projection Chamber with optical readout which records tracks of ions and protons in the gaseous volume. Six decays of 48Ni including four events of two-proton ground-state radioactivity were recorded. An advanced reconstruction procedure yielded the 2p decay energy for 48Ni of Q2p = 1.29(4) MeV. In addition, the energy spectra of \\b{eta}-delayed protons emitted in the decays of 44Cr and 46Fe, as well as half-lives and branching ratios were determined. The results were found to be consistent with the previous measurements made with Si detectors. A new proton line in the decay of 44Cr corresponding to the decay energy of 760 keV is reported. The first evidence for the \\b{eta}2p decay of 46 Fe, based on one clear event, is shown.

  19. Postirradiation deformation of ferritic Fe-Cr binary alloys

    SciTech Connect (OSTI)

    Hamilton, M.L.; Gelles, D.S.

    1991-06-01T23:59:59.000Z

    Six binary Fe-Cr alloys ranging from 3 to 18% chromium were irradiated in the form of miniature tensile specimens in the Fast Flux Test Facility and tested at room temperature. The irradiation conditions produced 7 to 30 dpa at 365 to 574{degrees}C. The major purpose of the experiment was to compare the behavior of these simple alloys with that of more complex commercial alloys, The tensile data obtained on these specimens at room temperature are discussed with appropriate fractographic and microstructural support. Previous studies on similar materials had revealed the presence of a feature typically exhibited in channel fractures: elongated voids were evident in shear bands of an irradiated and deformed TEM disk of a binary Fe-6Cr alloy. An additional purpose of the experiment was therefore to provide a better understanding of the potential contribution of channel fracture to deformation in ferritic alloys. No evidence for channel fracture was found, however. 14 refs., 6 figs., 2 tabs.

  20. Precipitation in 9Ni-12Cr-2Cu maraging steels

    SciTech Connect (OSTI)

    Stiller, K.; Haettestrand, M. [Chalmers Univ. of Technology, Goeteborg (Sweden). Dept. of Physics] [Chalmers Univ. of Technology, Goeteborg (Sweden). Dept. of Physics; Danoix, F. [Univ. de Rouen, Mont Saint Aignan (France). Lab. de Microscopie Ionique] [Univ. de Rouen, Mont Saint Aignan (France). Lab. de Microscopie Ionique

    1998-11-02T23:59:59.000Z

    Two maraging steels with the compositions 9Ni-12Cr-2Cu-4Mo (wt%) and 9Ni-12Cr-2Cu and with small additions of Al and Ti were investigated using atom probe field ion microscopy. Tomographic atom probe investigations were performed to clarify the spatial distribution of elements in and close to the precipitates. Materials heat treated at 475 C for 5, 25 min, 1, 2, 4 and 400 h were analyzed. Precipitates in the Mo-rich material were observed already after 5 min of aging, while in the material without MO, precipitation started later. In both materials precipitation begins with the formation of Cu-rich particles which work as nucleation sites for a Ni-rich phase of type Ni{sub 3}(Ti,Al). A Mo-rich phase was detected in the Mo-rich steel after 2 h of aging. The distribution of alloying elements in the precipitates, their role in the precipitation process, and the mechanism of hardening in the two materials are discussed.

  1. Corrosion resistance evaluation of 22Cr duplex stainless steel weldments

    SciTech Connect (OSTI)

    Kopliku, A. [AGIP S.p.A., Milan (Italy); Bell, D. [AGIP UK, London (United Kingdom); Barteri, M. [C.S.M., Rome (Italy); Fowler, C. [CAPCIS, Manchester (United Kingdom)

    1996-12-01T23:59:59.000Z

    Among the alternatives for the materials to be used for the construction of two flowlines 22Cr duplex stainless steel was taken into consideration. Corrosion resistance of the welds when exposed to the produced sour fluids was considered as the most critical point, so a program of corrosion testing on the 22Cr duplex stainless steel welds was developed. Three different welding procedures were used and tested in two different laboratories; specimens belonging to one of the welding procedures were also tested after a pre-strain to assess the effect of the deformation induced in the pipe by the wrapping in a reel. Tests were performed in an environment simulating the expected flowlines internal service conditions. Several testing procedures were used. Pitting test according to ASTM G48 Standard were carried out in order to rank welds and exposure tests in simulated field conditions were performed to assess stress corrosion and localized corrosion resistance. Test results showed that all the welds passed the tests and were applicable as corrosion resistant in the service environment. A ranking of the weld procedure based on their corrosion resistance has been determined.

  2. Extended Canadian middle atmosphere model: zonal-mean climatology and

    E-Print Network [OSTI]

    Wirosoetisno, Djoko

    and data assimilation; 3334 Meteorology and Atmospheric Dynamics: Middle atmosphere dynamics (0341, 0342 the Upper Atmos- phere Research Satellite (UARS), such as the Wind Imaging Interferometer (WINDII) [Shepherd and Dynamics (TIMED) satellite. These observations have provided (or will provide) a unique set of information

  3. Anoxygenic photosynthesis modulated Proterozoic oxygen and sustained Earth's middle age

    E-Print Network [OSTI]

    Macalady, Jenn

    Anoxygenic photosynthesis modulated Proterozoic oxygen and sustained Earth's middle age D. T photosynthesis to overall primary production would have influ- enced oceanic redox and the Proterozoic O2 budget time in Earth's history, complete dominance of oxygenic photosynthesis in the oceans. This paved

  4. Effect of Cr2O3 on the 18O Tracer Incorporation in SOFC Materials

    SciTech Connect (OSTI)

    Finsterbusch, M.; Lussier, A; Negusse, E; Zhu, Z; Smith, R; Schaefer, J; Idzerda, Y

    2010-01-01T23:59:59.000Z

    Investigations of the impact of Cr{sub 2}O{sub 3} overlayers on the oxygen self diffusion in two SOFC materials were conducted to gain insight into the Cr poisoning mechanism at the cathode side of solid oxide fuel cells (SOFCs) with stainless steel interconnects. High density Y{sub 0.15}Zr{sub 0.85}O{sub 2} (YSZ) and La{sub 0.6}Sr{sub 0.4}Co{sub 0.2}Fe{sub 0.8}O{sub 3} (LSCF) sintered pellets were covered with 3 to 30 nm Cr overlayers that were subsequently oxidized, forming Cr{sub 2}O{sub 3}. Standard {sup 18}O tracer diffusion experiments at 800 C were performed and ToF-SIMS profiling revealed that the oxygen ion diffusion coefficients were unaffected by the thin Cr{sub 2}O{sub 3} overlayers, which is predictable since they are a bulk property, but the extracted effective surface exchange coefficients varied with Cr{sub 2}O{sub 3} overlayer thickness. Solid-state reaction measurements and electronic structure considerations concerning the surface exchange, led to the conclusion that the observed oxygen uptake hindrance for Cr{sub 2}O{sub 3} capped LSCF and the slight increase of the surface exchange coefficient for Cr{sub 2}O{sub 3} capped YSZ can be attributed to the electronic properties of Cr{sub 2}O{sub 3}. A critical thickness for Cr{sub 2}O{sub 3} was determined to be 12 nm where the transition from decreasing cathode-performance to a Cr{sub 2}O{sub 3}-property-governed regime occurs.

  5. The rise of the emerging Middle East carriers : outlook and implications for the global airline industry

    E-Print Network [OSTI]

    Al-Sayeh, Karim Marwan

    2014-01-01T23:59:59.000Z

    The development of the aviation industry in the Middle East over the past decade has captivated both industry watchers and passengers alike. The interest in the Middle East aviation industry is due to the fact that it has ...

  6. "Shelter within my reach" : medium rise apartment housing for the middle income group in Karachi, Pakistan

    E-Print Network [OSTI]

    Mahmood, Saman, 1972-

    1999-01-01T23:59:59.000Z

    This thesis identifies the project development processes of medium rise (five storied or less) apartment housing built by the private formal sector, catering to the middle income groups in Karachi, Pakistan. Middle income ...

  7. Corrosion Behavior of Solution-Annealed CoCrMo Medical Implant

    E-Print Network [OSTI]

    Shull, Kenneth R.

    ! ! ! Corrosion Behavior of Solution- Annealed CoCrMo Medical Implant Alloys Pooja Panigrahi University June 6, 2011 #12;! ! ""! Corrosion Behavior of Solution-Annealed CoCrMo Medical Implant Alloys and Applied Sciences Northwestern University June 6, 2011 Abstract Corrosion behavior of solution annealed

  8. ENDOR study of Cr3 centers substituting for lithium in lithium niobate

    E-Print Network [OSTI]

    Malovichko, Galina

    ENDOR study of Cr3¿ centers substituting for lithium in lithium niobate G. Malovichko,1, * V centers in lithium niobate crystals were investigated with the help of electron nuclear double resonance and the parameters of hyperfine and quadrupole interactions were determined. It is found that Cr3 substitutes for Li

  9. MAGNESIUM ISOTOPIC COMPOSITION OF CAIs AND CHONDRULES FROM CR CHONDRITES. B. , M. Gounelle1

    E-Print Network [OSTI]

    Technische Universiteit Delft

    MAGNESIUM ISOTOPIC COMPOSITION OF CAIs AND CHONDRULES FROM CR CHONDRITES. B. Mimoun1 , M. Gounelle1. Introduction: The magnesium isotopic composi- tion of primitive extraterrestrial materials is worth measuring.g. 10]. Figure 1: The magnesium isotopic composition of CAIs in CR chondrites. Error bars are 1

  10. EPR, ENDOR, and optical-absorption study of Cr3 centers substituting

    E-Print Network [OSTI]

    Malovichko, Galina

    ARTICLES EPR, ENDOR, and optical-absorption study of Cr3¿ centers substituting for niobium in Li of Sciences, Kiev, Ukraine Received 6 January 2000; revised manuscript received 3 May 2000 A triplet of EPR % of Cr. Detailed investigations of the angular dependencies of EPR and electron nuclear double

  11. Field Investigations of Lactate-Stimulated Bioreduction of Cr(VI) at Hanford 100H

    SciTech Connect (OSTI)

    T. C. Hazen; B. Faybishenko; D. Joyner; S. Borglin; E. Brodie; S.; K. Williams; J. Peterson; J. Wan; T. Tokunaga; M.; P. E. Long; Resch, C.T.; Newcomer, D.; Koenigsberg, S.; Willet, A.

    2005-04-20T23:59:59.000Z

    The overall objective of this paper is to carry out field investigations to assess the potential for immobilizing and detoxifying chromium-contaminated groundwater using lactate-stimulated bioreduction of Cr(VI) to Cr(III) at the Hanford 100H site.

  12. Precipitation in a Cu–Cr–Zr–Mg alloy during aging

    SciTech Connect (OSTI)

    Cheng, J.Y., E-mail: bigchengjianyi@163.com; Shen, B.; Yu, F.X.

    2013-07-15T23:59:59.000Z

    The precipitation processes in a Cu-0.69Cr-0.10Zr-0.02Mg alloy aged at 450 °C and 550 °C have been investigated by transmission electron microscopy and high resolution transmission electron microscopy. The precipitation sequence in this alloy aged at 450 °C is: supersaturated solid solution ? Guinier–Preston zone (fcc Cr-rich phase) ? ordered fcc Cr-rich phase ? ordered bcc Cr-rich phase. The precipitation sequence in this alloy aged at 550 °C is: supersaturated solid solution ? ordered fcc Cr-rich phase ? ordered bcc Cr-rich phase. In the evolution of decomposition, the orientation relationship between the precipitates and the Cu matrix changes from cube-on-cube to Nishiyama–Wassermann orientation. The ordering of Cr-rich precipitates facilitates the formation of the bcc precipitates and promotes the development of Nishiyama–Wassermann orientation. - Highlights: • Two different precipitation sequences in the Cu–Cr–Zr–Mg alloy are proposed. • The changes in orientation relationship of the precipitates are presented. • The roles of ordering and coherent interface of the precipitates are discussed.

  13. Postirradiation deformation behavior in ferritic Fe-Cr alloys

    SciTech Connect (OSTI)

    Hamilton, M.L.; Gelles, D.S. [Pacific Northwest Lab., Richland, VA (United States); Gardner, P.L. [Univ. of Missouri, Rolla (United States)

    1992-12-31T23:59:59.000Z

    It has been demonstrated that fast neutron irradiation produces significant hardening in simple Fe(3-18)Cr binary alloys irradiated to about 35 dpa in the temperature range 365 to 420{degrees}C, whereas irradiation at 574{degrees}C produces hardening only for 15% or more chromium. The irradiation-induced changes in tensile properties are discussed in terms of changes in the power law work hardening exponent. The work hardening exponent of the lower chromium alloys decreased significantly after low temperature irradiation ({le}420{degrees}C) but increased after irradiation at 574{degrees}C. The higher chromium alloys failed either in cleavage or in a mixed ductile/brittle fashion. Deformation microstructures are presented to support the tensile behavior.

  14. Postirradiation deformation behavior in ferritic Fe-Cr alloys

    SciTech Connect (OSTI)

    Hamilton, M.L.; Gelles, D.S. [Pacific Northwest Lab., Richland, WA (United States); Gardner, P.L. [Missouri Univ., Rolla, MO (United States)

    1992-06-01T23:59:59.000Z

    It has been demonstrated that fast-neutron irradiation produces significant hardening in simple Fe-(3-18)Cr binary alloys irradiated to about 35 dpa in the temperature range 365 to 420{degrees}C, whereas irradiation at 574{degrees}C produces hardening only for 15% or more chromium. The irradiation-induced changes in tensile properties are discussed in terms of changes in the power law work-hardening exponent. The work-hardening exponent of the lower chromium alloys decreased significantly after low-temperature irradiation ({le} 420{degrees}C) but increased after irradiation at 574{degrees}C. The higher chromium alloys failed either in cleavage or in a mixed ductile/brittle fashion. Deformation microstructures are presented to support the tensile behavior.

  15. Postirradiation deformation behavior in ferritic Fe-Cr alloys

    SciTech Connect (OSTI)

    Hamilton, M.L.; Gelles, D.S. (Pacific Northwest Lab., Richland, WA (United States)); Gardner, P.L. (Missouri Univ., Rolla, MO (United States))

    1992-06-01T23:59:59.000Z

    It has been demonstrated that fast-neutron irradiation produces significant hardening in simple Fe-(3-18)Cr binary alloys irradiated to about 35 dpa in the temperature range 365 to 420[degrees]C, whereas irradiation at 574[degrees]C produces hardening only for 15% or more chromium. The irradiation-induced changes in tensile properties are discussed in terms of changes in the power law work-hardening exponent. The work-hardening exponent of the lower chromium alloys decreased significantly after low-temperature irradiation ([le] 420[degrees]C) but increased after irradiation at 574[degrees]C. The higher chromium alloys failed either in cleavage or in a mixed ductile/brittle fashion. Deformation microstructures are presented to support the tensile behavior.

  16. Ecological Factors Affecting Hispanic Urban Middle School and High School Adolescents’ College and Career Aspirations

    E-Print Network [OSTI]

    Hostrup, Judy Ann

    2011-08-08T23:59:59.000Z

    ............................................................................. 43 IV RESULTS.......................................................................................... 44 Results Related to Middle School Students ...................................... 44 Results Related to Research Question One... aspirations from both adolescent development areas (a) middle school and (b) high school. Most studies have examined Hispanic adolescents? college and career aspirations using samples from either middle school or high school. Included in the review...

  17. Is Wisconsin Becoming a Low-Wage Economy? Employment Growth in Low, Middle, and High

    E-Print Network [OSTI]

    Saldin, Dilano

    ' Occupational Employment Statistics (OES), we calculate the number of Wisconsin jobs in occupations paying low? Employment Growth in Low, Middle, and High Wage Occupations: 2000 of "middle skill" (and middle wage) jobs accompanied by employment growth at the lower and upper ends

  18. STARDUST INVESTIGATION INTO THE CR CHONDRITE GROVE MOUNTAIN 021710

    SciTech Connect (OSTI)

    Zhao Xuchao; Lin Yangting [Key Laboratory of the Earth's Deep Interior, Institute of Geology and Geophysics, Chinese Academy of Sciences, 19 Beituchengxi Road, Beijing 100029 (China); Floss, Christine [Laboratory for Space Sciences and Physics Department, Washington University, One Brookings Drive, St. Louis, MO 63130 (United States); Bose, Maitrayee, E-mail: linyt@mail.igcas.ac.cn [Department of Chemistry and Biochemistry, Arizona State University, P.O. Box 871604, Tempe, AZ 85287 (United States)

    2013-05-20T23:59:59.000Z

    We report the presolar grain inventory of the CR chondrite Grove Mountain 021710. A total of 35 C-anomalous grains ({approx}236 ppm) and 112 O-anomalous grains ({approx}189 ppm) were identified in situ using NanoSIMS ion imaging. Of 35 C-anomalous grains, 28 were determined to be SiC grains by Auger spectroscopy. Seven of the SiC grains were subsequently measured for N and Si isotopes, allowing classification as one nova grain, one Y grain, one Z grain, and four mainstream grains. Eighty-nine out of 112 O-anomalous grains belong to Group 1, indicating origins in low-to-intermediate-mass red giant and asymptotic giant branch stars. Twenty-one are Group 4 grains and have origins in supernovae. Auger spectroscopic elemental measurements of 35 O-anomalous grains show that 33 of them are ferromagnesian silicates. They have higher Mg/(Mg+Fe) ratios than those reported in other meteorites, suggesting a lower degree of alteration in the nebula and/or asteroid parent bodies. Only two oxide grains were identified, with stoichiometric compositions of MgAl{sub 2}O{sub 4} and SiO{sub 2}, respectively. The presolar silicate/oxide ratio of GRV 021710 is comparable with those of the CR3 chondrites (QUE 99177 and MET 00426) and primitive interplanetary dust particles. In order to search for presolar sulfides, the meteorite was also mapped for S isotopes. However, no presolar sulfides were found, suggesting a maximum abundance of 2 ppm. The scarcity of presolar sulfides may be due to their much faster sputtering rate by cosmic rays compared to silicates.

  19. Solid state phase equilibria and intermetallic compounds of the Al-Cr-Ho system

    SciTech Connect (OSTI)

    Pang, Mingjun [Laboratory of Nonferrous Metal Materials and New Processing Technology, Ministry of Education, Guangxi University, Nanning, Guangxi 530004 (China) [Laboratory of Nonferrous Metal Materials and New Processing Technology, Ministry of Education, Guangxi University, Nanning, Guangxi 530004 (China); SAIC-GM-Wuling Automobile Co., Ltd., Liuzhou, Guangxi 545007 (China); Zhan, Yongzhong, E-mail: zyzmatres@yahoo.com.cn [Laboratory of Nonferrous Metal Materials and New Processing Technology, Ministry of Education, Guangxi University, Nanning, Guangxi 530004 (China)] [Laboratory of Nonferrous Metal Materials and New Processing Technology, Ministry of Education, Guangxi University, Nanning, Guangxi 530004 (China); Du, Yong [State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083 (China)] [State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083 (China)

    2013-02-15T23:59:59.000Z

    The solid state phase equilibria of the Al-Cr-Ho ternary system at 500 Degree-Sign C were experimentally investigated. The phase relations at 500 Degree-Sign C are governed by 14 three-phase regions, 29 two-phase regions and 15 single-phase regions. The existences of 10 binary compounds and 2 ternary phases have been confirmed. Al{sub 11}Cr{sub 2}, Al{sub 11}Cr{sub 4} and Al{sub 17}Ho{sub 2} were not found at 500 Degree-Sign C. Crystal structures of Al{sub 9}Cr{sub 4} and Al{sub 8}Cr{sub 4}Ho were determined by the Rietveld X-ray powder data refinement. Al{sub 9}Cr{sub 4} was found to exhibit cubic structure with space group I4-bar 3m (no. 217) and lattice parameters a=0.9107(5) nm. Al{sub 8}Cr{sub 4}Ho crystallizes in ThMn{sub 12} structure type with space group I4/mmm (no. 139) and lattice parameters a=0.8909(4) nm, c=0.5120(5) nm. It is concluded that the obtained Al{sub 4}Cr phase in this work should be {mu}-Al{sub 4}Cr by comparing with XRD pattern of the hexagonal {mu}-Al{sub 4}Mn compound. - Graphical abstract: The solid state phase equilibria of the Al-Cr-Ho ternary system at 500 Degree-Sign C. Highlights: Black-Right-Pointing-Pointer Al-Cr-Ho system has been investigated. Black-Right-Pointing-Pointer Al{sub 9}Cr{sub 4} has cubic structure with space group I4-bar 3m. Black-Right-Pointing-Pointer Al{sub 8}Cr{sub 4}Ho crystallizes in ThMn{sub 12} type with space group I4/mmm. Black-Right-Pointing-Pointer Al{sub 4}Cr phase is {mu}-type at 500 Degree-Sign C.

  20. Mesoporous carbon -Cr2O3 composite as an anode material for lithium ion batteries

    SciTech Connect (OSTI)

    Guo, Bingkun [ORNL; Chi, Miaofang [ORNL; Sun, Xiao-Guang [ORNL; Dai, Sheng [ORNL

    2012-01-01T23:59:59.000Z

    Mesoporous carbon-Cr2O3 (M-C-Cr2O3) composite was prepared by co-assembly of in-situ formed phenolic resin, chromium precursor, and Pluronic block copolymer under acidic conditions, followed by carbonization at 750oC under Argon. The TEM results confirmed that the Cr2O3 nanoparticles, ranging from 10 to 20 nm, were well dispersed in the matrix of mesoporous carbon. The composite exhibited an initial reversible capacity of 710 mAh g-1 and good cycling stability, which is mainly due to the synergic effects of carbons within the composites, i.e. confining the crystal growth of Cr2O3 during the high temperature treatment step and buffering the volume change of Cr2O3 during the cycling step. This composite material is a promising anode material for lithium ion batteries.

  1. Void swelling resistance in Fe-Cr alloys at 200 dpa

    SciTech Connect (OSTI)

    Gelles, D.S. [Pacific Northwest Lab., Richland, WA (United States)

    1995-09-01T23:59:59.000Z

    Microstructural examinations have been performed on a serious of binary Fe-cr alloys irradiated to 200 dpa at 425 C in a fast breeder reactor. The alloy compositions ranged from 3% to 18% Cr in 3% Cr increments, and the irradiation temperature corresponded to the peak swelling condition for this alloy class. Density measurements showed swelling levels as high as 7.4%, with the highest swelling found in the Fe-9Cr and Fe-6Cr alloys. Microstructural examinations revealed that the highest swelling conditions contained well-developed voids, often as large as 100 nm, and a dislocation network comprised of both a/2<111> and a<100> Burgers vectors. Swelling was lower in the other alloys, and the swelling reduction could be correlated with increased precipitation. These results are considered in light of the current theories for low swelling in ferritic alloys, but no theory is available to completely explain the results.

  2. The resistance to cavitation erosion of CrMnN stainless steels

    SciTech Connect (OSTI)

    Fu, W.T. [Yanshan Univ., Qinhuangdao (China). Dept. of Materials Engineering] [Yanshan Univ., Qinhuangdao (China). Dept. of Materials Engineering; [Harbin Inst. of Tech. (China); Jing, T.F.; Zheng, Y.Z. [Yanshan Univ., Qinhuangdao (China). Dept. of Materials Engineering] [Yanshan Univ., Qinhuangdao (China). Dept. of Materials Engineering; Yang, Y.B. [Yanshan Univ., Qinhuangdao (China). Dept. of Materials Engineering] [Yanshan Univ., Qinhuangdao (China). Dept. of Materials Engineering; [Bohai Aluminum Industries Co., Ltd., Qinhuangdao (China); Yao, M. [Harbin Inst. of Tech. (China)] [Harbin Inst. of Tech. (China)

    1998-12-01T23:59:59.000Z

    The resistance to cavitation erosion (CE) was measured using a magnetostrictive device and a rotating disk device for some CrMnN stainless steels (Chinese patent ZL 90 1 02197.0). The microstructural changes in the surface layer before and after CE were analyzed by use of Mossbauer spectra. Results show that the resistance to CE of duplex austenitic-martensitic CrMnN stainless steels is much better than that of ZG0Cr13Ni4-6Mo and ZG0Cr16Ni5Mo steel, which are in common use for hydraulic turbine runners. The metastable austenite and its changes in the process of CE are the key factors why the CrMnN stainless steels have excellent resistance to cavitation erosion.

  3. Electron concentration and phase stability in NbCr2-based Laves phase alloys

    SciTech Connect (OSTI)

    Zhu, J.H.; Liaw, P.K. [Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering; Liu, C.T. [Oak Ridge National Lab., TN (United States). Metals and Ceramics Div.

    1997-05-12T23:59:59.000Z

    Phase stability in NbCr{sub 2}-based transition-metal Laves phases was studied, based on the data reported for binary X-Cr, Nb-X, and ternary Nb-Cr-X phase diagrams. It was shown that when the atomic size ratios are kept identical, the average electron concentration factor, e/a, is the dominating factor in controlling the phase stability of NbCr{sub 2}-based transition-metal Laves phases. The e/a ratios for different Laves polytypes were determined as followed: with e/a < 5.76, the C15 structure is stabilized; at an e/a range of 5.88--7.53, the C14 structure is stabilized; with e/a > 7.65, the C15 structure is stabilized again. A further increase in the electron concentration factor (e/a > 8) leads to the disordering of the alloy. The electron concentration effect on the phase stability of Mg-based Laves phases and transition-metal A{sub 3}B intermetallic compounds is also reviewed and compared with the present observations in transition-metal Laves phases. In order to verify the e/a/phase stability relationship experimentally, additions of Cu (with e/a = 11) were selected to replace Cr in the NbCr{sub 2} Laves phase. Experimental results for the ternary Nb-Cr-Cu system are reported and discussed in terms of the correlation between the e/a ratio and phase stability in NbCr{sub 2}-based Laves phases. A new phase was found, which has an average composition of Nb-47Cr-3Cu. Within the solubility limit, the electron concentration and phase stability relationship is obeyed in the Nb-Cr-Cu system.

  4. Integrated Ecogenomics Study for Bioremediation of Cr(VI) at Hanford 100H Area

    SciTech Connect (OSTI)

    Chakraborty, Romy; Chakraborty, Romy

    2008-08-12T23:59:59.000Z

    Hexavalent chromium is a widespread contaminant found in groundwater. In order to stimulate microbially mediated Cr(VI)-reduction, a poly-lactate compound was injected into Cr(VI)-contaminated aquifers at site 100H at Hanford. Investigation of bacterial community composition using high-density DNA microarray analysis of 16S rRNA gene products revealed a stimulation of Pseudomonas, Desulfovibrio and Geobacter species amongst others. Enrichment of these organisms coincided with continued Cr(VI) depletion. Functional gene-array analysis of DNA from monitoring well indicated high abundance of genes involved in nitrate-reduction, sulfate-reduction, iron-reduction, methanogenesis, chromium tolerance/reduction. Clone-library data revealed Psedomonas was the dominant genus in these samples. Based on above results, we conducted lab investigations to study the dominant anaerobic culturable microbial populations present at this site and their role in Cr(VI)-reduction. Enrichments using defined anaerobic media resulted in isolation of an iron-reducing, a sulfate-reducing and a nitrate-reducing isolate among several others. Preliminary 16S rDNA sequence analysis identified the isolates as Geobacter metallireducens, Pseudomonas stutzeri and Desulfovibrio vulgaris species respectively. The Pseudomonas isolate utilized acetate, lactate, glycerol and pyruvate as alternative carbon sources, and reduced Cr(VI). Anaerobic washed cell suspension of strain HLN reduced almost 95?M Cr(VI) within 4 hr. Further, with 100?M Cr(VI) as sole electron-acceptor, cells grew to 4.05 x 107 /ml over 24 h after an initial lag, demonstrating direct enzymatic Cr(VI) reduction coupled to growth. These results demonstrate that Cr(VI)-immobilization at Hanford 100H site could be mediated by direct microbial metabolism in addition to indirect chemical reduction of Cr(VI) by end-products of microbial activity.

  5. Oil and gas developments in Middle East in 1983

    SciTech Connect (OSTI)

    Hemer, D.O.; Pickford, P.J.

    1984-10-01T23:59:59.000Z

    Petroleum production in Middle East countries during 1983 totaled 4,275,054,000 bbl (an average rate of 11,712,476 BOPD), down 3.7% from the revised total of 4,440,841,000 bbl produced in 1982. Iran, Kuwait, the Kuwait-Saudi Arabia Divided Neutral Zone, and Oman had significant increases. Saudi Arabia, Qatar, and Abu Dhabi had significant decreases. 8 figures, 9 tables.

  6. Hood River Middle School Music and Science Building

    High Performance Buildings Database

    Hood River, OR The Hood River Middle School Music and Science Building is includes music and science classroom, music practice rooms, teacher offices, a greenhouse, an adjacent recycling and storage building, and outdoor spaces including an amphitheater and garden. The building is integrated with the school's progressive sustainability and permaculture curriculum. Students can track and create experiments using data from the buildings net zero energy system and rainwater harvesting system, and learn about the building's innovative and integrated use of materials and systems.

  7. Middle Georgia El 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 Office of InspectorConcentrating Solar Powerstories onFocus Area Energy Efficiency, RenewableMiddle Georgia El Member

  8. Simulation of Reduction of Cr(VI) by Fe(II) Produced Electrochemically in a Parallel-Plate Electrochemical Reactor

    E-Print Network [OSTI]

    at the cathode, electrocoagulation uses electricity to produce a reducing agent ferrous ions from an iron anode the reduction of Cr VI by permeable reactive barriers. Gheju and Lovi7 reported that the re- duction of Cr VI

  9. Implementation of scattering pinhole diagnostic for detection of fusion products on CR-39 at high particle fluence

    E-Print Network [OSTI]

    Orozco, David, S.B. Massachusetts Institute of Technology

    2014-01-01T23:59:59.000Z

    Many Inertial Confinement Fusion (ICF) experiments use solid-state nuclear track detector CR-39 as a means to detect different types of nuclear products. Until recently, it was difficult to use CR-39 in experiments with ...

  10. Regional stratigraphy and petroleum geology, North Africa-Middle East

    SciTech Connect (OSTI)

    Peterson, J.A. (Univ. of Montana, Missoula (United States))

    1991-03-01T23:59:59.000Z

    The North Africa-Middle East petroleum provinces are part of the broad sedimentary platform that occupied the northern and northeastern borders of the African-Arabian craton adjacent to the ancestral Hercynian (late Paleozoic) and subsequent Tethyan-Alpine oceans. Carbonate-clastic-evaporite sediments of infra-Cambrian through Holocene age were cyclically deposited in a relatively continuous belt around the eastern and northern borders of the craton, mainly on a broad, shallow-water platform adjacent to the proto-Tethys and Tethys seaway. The Paleozoic section reaches a substantial thickness in the subsurface of the Middle East and in northern Africa adjacent to the Mediterranean Sea, but all or part of it is absent because of nondeposition or erosion over much of the region. Post-Paleozoic deposition was more or less continuous across the entire craton border region in the Middle East and along the northern border of the Sahara platform in North Africa and in Somalia and eastern Ethiopia. Similar marine and associated sedimentary rock facies are present in all of these regions, although paleotectonic-stratigraphic interrelationships and continental paleolatitude positions have greatly affected petroleum generation and accumulation in the specific provinces along the craton border. A series of regional stratigraphic-sedimentary environment, and continental position, layer maps illustrates the relative influence of these factors through geologic time with respect to the relationship between petroleum reservoirs, source rocks, and confining rock facies.

  11. A new model to account for track overlap in CR-39 data A.B. Zylstra a,n

    E-Print Network [OSTI]

    in revised form 3 April 2012 Accepted 3 April 2012 Available online 19 April 2012 Keywords: CR-39 Nuclear track detectors Inertial confinement fusion a b s t r a c t The solid-state nuclear track detector CR-39 such as neutron dosimetry and radon detection. The upper limit of detectable charged-particle fluence on CR-39

  12. Role of Embedded Clustering in Dilute Magnetic Semiconductors: Cr Doped GaN X. Y. Cui,1

    E-Print Network [OSTI]

    Medvedeva, Julia E.

    , typically 5 (20­30) times smaller for Cr-based (Mn-based) III-V DMS than the value expected, 3 B= Cr4 BRole of Embedded Clustering in Dilute Magnetic Semiconductors: Cr Doped GaN X. Y. Cui,1 J. E configurations coexist and the statistical distribution and associated magnetism will depend sensitively

  13. Differential isotopic fractionation during Cr(VI) reduction by an aquifer-derived bacterium under arobic versus denitrifying conditions

    SciTech Connect (OSTI)

    Han, R.; Qin, L.; Brown, S. T.; Christensen, J. N.; Beller, H. R.

    2012-02-01T23:59:59.000Z

    We studied Cr isotopic fractionation during Cr(VI) reduction by Pseudomonas stutzeri strain RCH2. Despite the fact that strain RCH2 reduces Cr(VI) co-metabolically under both aerobic and denitrifying conditions and at similar specific rates, fractionation was markedly different under these two conditions (ε ~2? aerobically and ~0.4? under denitrifying conditions).

  14. Cr-Ga-N materials for negative electrodes in Li rechargeable batteries : structure, synthesis and electrochemical performance

    E-Print Network [OSTI]

    Kim, Miso

    2007-01-01T23:59:59.000Z

    Electrochemical performances of two ternary compounds (Cr2GaN and Cr3GaN) in the Cr-Ga-N system as possible future anode materials for lithium rechargeable batteries were studied. Motivation for this study was dealt in ...

  15. Nanoscale Phase Separation In Epitaxial Cr-Mo and Cr-V Alloy Thin Films Studied Using Atom Probe Tomography: Comparison Of Experiments And Simulation

    SciTech Connect (OSTI)

    Devaraj, Arun; Kaspar, Tiffany C.; Ramanan, Sathvik; Walvekar, Sarita K.; Bowden, Mark E.; Shutthanandan, V.; Kurtz, Richard J.

    2014-11-21T23:59:59.000Z

    Tailored metal alloy thin film-oxide interfaces generated using molecular beam epitaxial (MBE) deposition of alloy thin films on a single crystalline oxide substrate can be used for detailed studies of irradiation damage response on the interface structure. However presence of nanoscale phase separation in the MBE grown alloy thin films can impact the metal-oxide interface structure. Due to nanoscale domain size of such phase separation it is very challenging to characterize by conventional techniques. Therefor laser assisted atom probe tomography (APT) was utilized to study the phase separation in epitaxial Cr0.61Mo0.39, Cr0.77Mo0.23, and Cr0.32V0.68 alloy thin films grown by MBE on MgO(001) single crystal substrates. Statistical analysis, namely frequency distribution analysis and Pearson coefficient analysis of experimental data was compared with similar analyses conducted on simulated APT datasets with known extent of phase separation. Thus the presence of phase separation in Cr-Mo films, even when phase separation was not clearly observed by x-ray diffraction, and the absence of phase separation in the Cr-V film were thus confirmed.

  16. Ni-Cr-P plating bath time dependent characterization by ion chromatography

    E-Print Network [OSTI]

    Faxel, Ralph Edward

    1990-01-01T23:59:59.000Z

    analysis of Cr VII. HPIC gradient eluation program for anions VIII. HPIC eluation program for HsBOs IX. A method comparison of initial Ni-Cr-P plating bath ionic species concentrations as determined by weight measurement and HPIC analysis. X. Ni... the rate constants for compound C. 40 44 79 80 CHAPTER I INTRODUCTION Amorphous Nickel-Chromium-Phosphorus (Ni-Cr-P) alloys have outstand- ing corrosion resistance, which is even superior to that of Hastelloy C-276 (1). This corrosion resistance...

  17. High temperature oxidation behavior of Fe-Cr-Al foils

    SciTech Connect (OSTI)

    Chang, C.S.; Jha, B. [Texas Instruments, Inc., Attleboro, MA (United States)

    1998-12-31T23:59:59.000Z

    Metallic catalytic converters for automotive emission control is becoming an important application for heat resistant alloys as more design opportunities are realized. The service conditions and design of metallic catalytic converters require the alloy to be highly oxidation resistant at gauges typically at 50 microns or less. For conventional heat resistant alloy design the goal is to form a well adherent scale on the alloy surface to protect the alloy matrix from being oxidized. However, the thin gauge results in a limited supply of alloying elements that can form the protective scale on the surface. The alloy chemistry has to be optimized to have the minimum oxidation while maintaining processing characteristics. Furthermore, the ratio of scale thickness to foil gauge is significant and the stress state between them introduces measurable permanent distortion of the foil. In this study, the effect of alloying elements on the oxidation behavior of commonly used Fe-Cr-Al alloys was quantified by the oxidation weight gain and length change measurements.

  18. Steamside Oxidation Behavior of Experimental 9%Cr Steels

    SciTech Connect (OSTI)

    Dogan, O.N.; Holcomb, G.R.; Alman, D.E.; Jablonski, P.D.

    2007-10-01T23:59:59.000Z

    Reducing emissions and increasing economic competitiveness require more efficient steam power plants that utilize fossil fuels. One of the major challenges in designing these plants is the availability of materials that can stand the supercritical and ultra-supercritical steam conditions at a competitive cost. There are several programs around the world developing new ferritic and austenitic steels for superheater and reheater tubes exposed to the advanced steam conditions. The new steels must possess properties better than current steels in terms of creep strength, steamside oxidation resistance, fireside corrosion resistance, and thermal fatigue resistance. This paper introduces a series of experimental 9%Cr steels containing Cu, Co, and Ti. Stability of the phases in the new steels is discussed and compared to the phases in the commercially available materials. The steels were tested under both the dry and moist conditions at 650ºC for their cyclical oxidation resistance. Results of oxidation tests are presented. Under the moist conditions, the experimental steels exhibited significantly less mass gain compared to the commercial P91 steel. Microstructural characterization of the scale revealed different oxide compositions.

  19. Electrochemical Testing of Ni-Cr-Mo-Gd Alloys

    SciTech Connect (OSTI)

    T. E. Lister; R. E. Mizia; H. Tian

    2005-10-01T23:59:59.000Z

    The waste package site recommendation design specified a boron-containing stainless steel, Neutronit 976/978, for fabrication of the internal baskets that will be used as a corrosion-resistant neutron-absorbing material. Recent corrosion test results gave higher-than-expected corrosion rates for this material. The material callout for these components has been changed to a Ni-Cr-Mo-Gd alloy (ASTM-B 932-04, UNS N06464) that is being developed at the Idaho National Laboratory. This report discusses the results of initial corrosion testing of this material in simulated in-package environments that could contact the fuel baskets after breach of the waste package outer barrier. The corrosion test matrix was executed using the potentiodynamic and potentiostatic electrochemical test techniques. The alloy performance shows low rates of general corrosion after initial removal of a gadolinium-rich second phase that intersects the surface. The high halide-containing test solutions exhibited greater tendencies toward initiation of crevice corrosion.

  20. Oil and gas developments in Middle East in 1985

    SciTech Connect (OSTI)

    Hemer, D.O.; Gohrbandt, K.H.A.

    1986-10-01T23:59:59.000Z

    Petroleum production in Middle East countries during 1985 totaled 3,837,580,000 bbl (an average rate of 10,513,917 BOPD), down 2.2% from the revised 1984 total of 3,924,034,000 bbl. Iran, Iraq, Dubai, Oman, and Syria had significant increases; Kuwait, Kuwait-Saudi Arabia Divided Neutral Zone, Saudi Arabia, and Qatar had significant decreases. New fields went on production in Iraq, Abu Dhabi, Oman, and Syria. In North Yemen, the first ever oil production in that country was nearing the start-up stage at year end. 9 figures, 9 tables.

  1. Surficial sediments and sedimentary structures: Middle Ground, Padre Island, Texas.

    E-Print Network [OSTI]

    Zupan, Alan-Jon Wellward

    1971-01-01T23:59:59.000Z

    . In the cs. se of the Middle Ground, the detrital material would be tan, mono- minerallic (quartz) sandstones. Underlying and parti ally surrour ding the wind- tidal sediments would be lagoonal or bay facies. An offshore barrie. " or mainlar d would... and & s inundated at irregular interval by lagoonal or bay water=" under the infl. uence of wind- generated tides (Hs. yes (1565 modified from P;. ' ce's (Io58) "wind tide accumula, . ion flats"), . 'irjthin the Coastal Bend of the Texas Gulf Coast, the '!ind...

  2. Middle School | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched5 IndustrialIsadore Perlman, 1960 The ErnestLouisMichael J. Lineberry, 1982 TheMiddle

  3. Secretary Bodman Travels to the Middle East | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of Energy Power.pdf11-161-LNG |September2-SCORECARD-01-24-13 Page 1to Launch NewBiorefinerythe Middle East

  4. Middle School Students Go Green | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d F S i DOE TribaltheMy nameMid-Level Ethanol Blends TestMiddle School

  5. CORROSION OF Fe-10Al-Cr ALLOYS BY COAL CHAR

    E-Print Network [OSTI]

    Gordon, B.A.

    2011-01-01T23:59:59.000Z

    owned rights. LBL-6946 Corrosion of Fe-lOAl-Cr Alloys byOctober, 1977 Abstract Corrosion of iron-base alloys at 982°high-temperature induced corrosion are probably sulfides and

  6. Structure, Magnetism, and Transport of CuCr2Se4 Thin Films

    E-Print Network [OSTI]

    2008-01-01T23:59:59.000Z

    Structure, Magnetism, and Transport of CuCr 2 Se 4 Thindichroism shows that the magnetism persists to the surfacesuch as the nature of magnetism at surfaces and interfaces.

  7. E-Print Network 3.0 - austenitic fe-cr-ni alloys Sample Search...

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

    than at 650C. Therefore, for these Fe-Cr-Ni model alloys, increasing... Figure 5 shows LM of the samples after 100x1h cycles at 650C for representative ... Source: Pint, Bruce...

  8. C/CrC nanocomposite coating deposited by magnetron sputtering at high ion irradiation conditions

    SciTech Connect (OSTI)

    Zhou, Z.; Rainforth, W. M. [Department of Materials Science and Engineering, University of Sheffield, Sheffield, S1 3JD (United Kingdom); Gass, M. H.; Bleloch, A. [SuperSTEM at Daresbury Laboratory, Daresbury, Cheshire, WA4 4AD (United Kingdom); Ehiassarian, A. P.; Hovsepian, P. Eh. [Materials Engineering Research Institute, Sheffield Hallam University, Sheffield, S1 1WB (United Kingdom)

    2011-10-01T23:59:59.000Z

    CrC with the fcc NaCl (B1) structure is a metastable phase that can be obtained under the non-equilibrium conditions of high ion irradiation. A nano-composite coating consisting of amorphous carbon embedded in a CrC matrix was prepared via the unbalanced magnetron sputtering of graphite and Cr metal targets in Ar gas with a high ionized flux (ion-to-neutral ratio Ji/Jn = 6). The nanoscale amorphous carbon clusters self-assembled into layers alternated by CrC, giving the composite a multilayer structure. The phase, microstructure, and composition of the coating were characterized using x-ray diffraction, transmission electron microscopy, and aberration corrected scanning transmission electron microscopy coupled with electron energy loss spectroscopy. The interpretation of the true coating structure, in particular the carbide type, is discussed.

  9. Process for producing Ti-Cr-Al-O thin film resistors

    DOE Patents [OSTI]

    Jankowski, Alan F. (Livermore, CA); Schmid, Anthony P. (Solana Beach, CA)

    2001-01-01T23:59:59.000Z

    Thin films of Ti-Cr-Al-O are used as a resistor material. The films are rf sputter deposited from ceramic targets using a reactive working gas mixture of Ar and O.sub.2. Resistivity values from 10.sup.4 to 10.sup.10 Ohm-cm have been measured for Ti-Cr-Al-O film <1 .mu.m thick. The film resistivity can be discretely selected through control of the target composition and the deposition parameters. The application of Ti-Cr-Al-O as a thin film resistor has been found to be thermodynamically stable, unlike other metal-oxide films. The Ti-Cr-Al-O film can be used as a vertical or lateral resistor, for example, as a layer beneath a field emission cathode in a flat panel display; or used to control surface emissivity, for example, as a coating on an insulating material such as vertical wall supports in flat panel displays.

  10. Flat panel display using Ti-Cr-Al-O thin film

    DOE Patents [OSTI]

    Jankowski, Alan F. (Livermore, CA); Schmid, Anthony P. (Solan Beach, CA)

    2002-01-01T23:59:59.000Z

    Thin films of Ti--Cr--Al--O are used as a resistor material. The films are rf sputter deposited from ceramic targets using a reactive working gas mixture of Ar and O.sub.2. Resistivity values from 10.sup.4 to 10.sup.10 Ohm-cm have been measured for Ti--Cr--Al--O film <1 .mu.m thick. The film resistivity can be discretely selected through control of the target composition and the deposition parameters. The application of Ti--Cr--Al--O as a thin film resistor has been found to be thermodynamically stable, unlike other metal-oxide films. The Ti--Cr--Al--O film can be used as a vertical or lateral resistor, for example, as a layer beneath a field emission cathode in a flat panel display; or used to control surface emissivity, for example, as a coating on an insulating material such as vertical wall supports in flat panel displays.

  11. Cr(VI) reduction in aqueous solutions by using copper smelter slag

    SciTech Connect (OSTI)

    Kiyak, B.; Oezer, A.; Altundogan, H.S.; Erdem, M.; Tuemen, F. (Firat Univ., Elazig (Turkey))

    1999-01-01T23:59:59.000Z

    The ability of Copper Smelter Slag (CSS) to reduce Cr(VI) in aqueous solutions has been investigated. The extent of reduction if dependent on the amounts of acid and reductant, contact time, Cr(VI) concentration, temperature of the solution and particle size of CSS. The amount of acid is the most important variable affecting the reduction process. When twice the amount of acid required with respect to Cr(VI) was used, Cr(VI) in 100 ml solution (100 mg/l) was completely reduced in a contact period less than 5 min by a 10 g/l dosage of CSS. Reduction efficiency increased with increase in temperature of solution, showing that the process is endothermic. Reduced chromium, and iron and other metals dissolved from CSS were effectively precipitated by using NaOH or calcinated carbonation sludge from sugar plant.

  12. Cr(VI) reduction in aqueous solutions by using copper smelter slag

    SciTech Connect (OSTI)

    Kiyak, B.; Oezer, A.; Altundogan, H.S.; Erdem, M.; Tuemen, F. [Firat Univ., Elazig (Turkey)] [Firat Univ., Elazig (Turkey)

    1999-11-01T23:59:59.000Z

    The ability of Copper Smelter Slag (CSS) to reduce Cr(VI) in aqueous solutions has been investigated. The extent of reduction if dependent on the amounts of acid and reductant, contact time, Cr(VI) concentration, temperature of the solution and particle size of CSS. The amount of acid is the most important variable affecting the reduction process. When twice the amount of acid required with respect to Cr(VI) was used, Cr(VI) in 100 ml solution (100 mg/l) was completely reduced in a contact period less than 5 min by a 10 g/l dosage of CSS. Reduction efficiency increased with increase in temperature of solution, showing that the process is endothermic. Reduced chromium, and iron and other metals dissolved from CSS were effectively precipitated by using NaOH or calcinated carbonation sludge from sugar plant.

  13. Microstructures of Metallic NiCrBSi Coatings Manufactured via Hybrid Plasma Spray

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , nanoindentation, NiCrBSi, plasma-laser hybrid process, scratch testing 1. Introduction Electrodeposited hard, uniform microstructure, high hardness, and highly adhesive bonding to the substrate (Ref 8). Nickel

  14. Electronic Structure of CrN: from Macro to Nano | Argonne National...

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

    Electronic Structure of CrN: from Macro to Nano January 28, 2015 11:00AM to 12:00PM Presenter Antia Sanchez Botana, University of California, Davis Location Building 223, Room S105...

  15. A few-cycle Cr??:YAG laser and optical studies of photonic crystals

    E-Print Network [OSTI]

    Ripin, Daniel Jacob, 1973-

    2002-01-01T23:59:59.000Z

    A prismless Cr4+:YAG laser was used to generate 20 fs pulses at 1450 nm with a bandwidth of 190 nm FWHM. Intracavity group velocity dispersion was compensated with double-chirped mirrors. Pulse spectrum was observable from ...

  16. CORROSION OF Fe-10Al-Cr ALLOYS BY COAL CHAR

    E-Print Network [OSTI]

    Gordon, B.A.

    2011-01-01T23:59:59.000Z

    Potent.ials Encountered in Coal Conversion Systems", NASA TNof Illinois #6 ash and coal char. Figure 1. Cross sectionsof Fe-lOAl-Cr Alloys by Coal Char B. A. Gordon and V.

  17. Surface modification to improve fireside corrosion resistance of Fe-Cr ferritic steels

    DOE Patents [OSTI]

    Park, Jong-Hee (Clarendon Hills, IL); Natesan, Krishnamurti (Naperville, IL); Rink, David L. (Mokena, IL)

    2010-03-16T23:59:59.000Z

    An article of manufacture and a method for providing an Fe--Cr ferritic steel article of manufacture having a surface layer modification for corrosion resistance. Fe--Cr ferritic steels can be modified to enhance their corrosion resistance to liquid coal ash and other chemical environments, which have chlorides or sulfates containing active species. The steel is modified to form an aluminide/silicide passivating layer to reduce such corrosion.

  18. Heat treatment of NiCrFe alloy to optimize resistance to intergrannular stress corrosion

    DOE Patents [OSTI]

    Steeves, Arthur F. (Schenectady, NY); Bibb, Albert E. (Clifton Park, NY)

    1984-01-01T23:59:59.000Z

    A process of producing a NiCrFe alloy having a high resistance to stress corrosion cracking comprising heating a NiCrFe alloy to a temperature sufficient to enable the carbon present in the alloy body in the form of carbide deposits to enter into solution, rapidly cool the alloy body, and heat the cooled body to a temperature between 1100.degree. to 1500.degree. F. for about 1 to 30 hours.

  19. Optimizing Cr(VI) and Tc(VII) remediation through nano-scale biomineral engineering

    SciTech Connect (OSTI)

    Cutting, R. S.; Coker, V. S.; Telling, N. D.; Kimber, R. L.; Pearce, C. I.; Ellis, B.; Lawson, R; van der Laan, G.; Pattrick, R.A.D.; Vaughan, D.J.; Arenholz, E.; Lloyd, J. R.

    2009-09-09T23:59:59.000Z

    To optimize the production of biomagnetite for the bioremediation of metal oxyanion contaminated waters, the reduction of aqueous Cr(VI) to Cr(III) by two biogenic magnetites and a synthetic magnetite was evaluated under batch and continuous flow conditions. Results indicate that nano-scale biogenic magnetite produced by incubating synthetic schwertmannite powder in cell suspensions of Geobacter sulfurreducens is more efficient at reducing Cr(VI) than either biogenic nano-magnetite produced from a suspension of ferrihydrite 'gel' or synthetic nano-scale Fe{sub 3}O{sub 4} powder. Although X-ray Photoelectron Spectroscopy (XPS) measurements obtained from post-exposure magnetite samples reveal that both Cr(III) and Cr(VI) are associated with nanoparticle surfaces, X-ray Magnetic Circular Dichroism (XMCD) studies indicate that some Cr(III) has replaced octahedrally coordinated Fe in the lattice of the magnetite. Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES) measurements of total aqueous Cr in the associated solution phase indicated that, although the majority of Cr(III) was incorporated within or adsorbed to the magnetite samples, a proportion ({approx}10-15 %) was released back into solution. Studies of Tc(VII) uptake by magnetites produced via the different synthesis routes also revealed significant differences between them as regards effectiveness for remediation. In addition, column studies using a {gamma}-camera to obtain real time images of a {sup 99m}Tc(VII) radiotracer were performed to visualize directly the relative performances of the magnetite sorbents against ultra-trace concentrations of metal oxyanion contaminants. Again, the magnetite produced from schwertmannite proved capable of retaining more ({approx}20%) {sup 99m}Tc(VII) than the magnetite produced from ferrihydrite, confirming that biomagnetite production for efficient environmental remediation can be fine-tuned through careful selection of the initial Fe(III) mineral substrate supplied to Fe(III)-reducing bacteria.

  20. Event-by-event study of CR composition with the SPHERE experiment using the 2013 data

    E-Print Network [OSTI]

    Antonov, R A; Bonvech, E A; Chernov, D V; Dzhatdoev, T A; Finger, Mich; Finger, Mir; Galkin, V I; Podgrudkov, D A; Roganova, T M

    2015-01-01T23:59:59.000Z

    We present an event-by-event study of cosmic ray (CR) composition with the reflected Cherenkov light method. The fraction of CR light component above 5 PeV was reconstructed using the 2013 run data of the SPHERE experiment which observed optical Vavilov-Cherenkov radiation of extensive air showers, reflected from snow surface of Lake Baikal. Additionally, we discuss a possibility to improve the elemental groups separability by means of multidimensional criteria.

  1. PVD synthesis and high-throughput property characterization of Ni?Fe?Cr alloy libraries

    SciTech Connect (OSTI)

    Rar, A.; Frafjord, J.J.; Fowlkes, Jason D.; Specht, E.D.; Rack, P.D.; Santella, M.L.; Bei, H.; George, E.P.; Pharr, G.M. (Tennessee-K); (Tennessee-K); (ORNL)

    2010-11-10T23:59:59.000Z

    Three methods of alloy library synthesis, thick-layer deposition followed by interdiffusion, composition-spread codeposition and electron-beam melting of thick deposited layers, have been applied to Ni-Fe-Cr ternary and Ni-Cr binary alloys. Structural XRD mapping and mechanical characterization by means of nanoindentation have been used to characterize the properties of the libraries. The library synthesis methods are compared from the point of view of the structural and mechanical information they can provide.

  2. High-pressure structure of half-metallic CrO2 B. R. Maddox

    E-Print Network [OSTI]

    Pickett, Warren

    transition from rutile -CrO2 phase I P42/mnm to orthorhombic -CrO2 phase II CaCl2-like, Pnnm is presented. The transition to the CaCl2 structure, which appears to be second order, occurs at 12±3 GPa without any typically transforms to another sixfold-coordinated structure, CaCl2, or the -PbO2 structure found in shock

  3. Microstructure and Mechanical Property Studies on Neutron-Irradiated Ferritic Fe-Cr Model Alloys

    SciTech Connect (OSTI)

    Jian Gan; Maria Okuniewski; Wei-Ying Chen; Yinbin Miao; Carolyn A. Tomchik; James F. Stubbins; Y. Q. Wu; Stu A. Maloy

    2014-06-01T23:59:59.000Z

    Model Fe, Fe-10Cr and Fe-14Cr alloys were irradiated in Advanced Test Reactor at 300°C and 450°C to target doses of 0.01, 0.1 and 1 dpa. The microstructure and the mechanical property of irradiated specimens were investigated using TEM, APT and hardness measurements. The irradiation-induced hardening was consistent with the observed microstructures. For lower doses of 0.01 and 0.1 dpa, the formation of dislocation loops was the primarily contributor to the hardening; no a’ precipitates of resolvable sizes were observed. By 1 dpa, additional increase in hardening were attributed to the formation of a high density of 1-2 nm a' precipitates. In Fe, the hardness increased less as a function of irradiation dose compared to Fe-Cr alloys because of the lack of a' precipitation and differences in loop structures. Three single-parameter effects have been studied: the Cr content, the irradiation temperature and the grain size. The addition of Cr reduced the mobility of both ½<111> and <100> dislocation loops, leading to a smaller loop size and higher loop density. Also, the Cr contents were positively correlated to the density of a' precipitates, but were less relevant to the precipitate size. Higher irradiation temperature of 450°C resulted in a preferential production of the immobile <100> loops over the mobile ½<111> loops (ex. a ratio of 8:1 in Fe-10Cr irradiated 450°C to 0.01 dpa). At lower temperature of 300°C, heterogeneous formation of dislocation loops at the vicinity of line dislocations frequently. In Fe, the development of dislocation loops was suppressed (compared to Fe-Cr alloys) due to a combination of smaller grain size, high initial dislocation density and high defect mobility.

  4. Oxidation behavior of arc evaporated Al-Cr-Si-N thin films

    SciTech Connect (OSTI)

    Tritremmel, Christian; Daniel, Rostislav; Mitterer, Christian; Mayrhofer, Paul H.; Lechthaler, Markus; Polcik, Peter [Christian Doppler Laboratory for Advanced Hard Coatings, Department of Physical Metallurgy and Materials Testing, Montanuniversitaet Leoben, Franz-Josef-Strasse 18, A-8700 Leoben (Austria); Christian Doppler Laboratory for Application Oriented Coating Development, Department of Physical Metallurgy and Materials Testing, Montanuniversitaet Leoben, Franz-Josef-Strasse 18, A-8700 Leoben (Austria); OC Oerlikon Balzers AG, Iramali 18, LI-9496 Balzers (Liechtenstein); PLANSEE Composite Materials GmbH, Siebenbuergerstrasse 23, D-86983 Lechbruck am See (Germany)

    2012-11-15T23:59:59.000Z

    The impact of Al and Si on the oxidation behavior of Al-Cr-(Si)-N thin films synthesized by arc evaporation of powder metallurgically prepared Al{sub x}Cr{sub 1-x} targets with x = Al/(Al + Cr) of 0.5, 0.6, and 0.7 and (Al{sub 0.5}Cr{sub 0.5}){sub 1-z}Si{sub z} targets with Si contents of z = 0.05, 0.1, and 0.2 in N{sub 2} atmosphere was studied in detail by means of differential scanning calorimetry, thermogravimetric analysis (TGA), x-ray diffraction, and Raman spectroscopy. Dynamical measurements in synthetic air (up to 1440 Degree-Sign C) revealed the highest onset temperature of pronounced oxidation for nitride coatings prepared from the Al{sub 0.4}Cr{sub 0.4}Si{sub 0.2} target. Isothermal TGA at 1100, 1200, 1250, and 1300 Degree-Sign C highlight the pronounced improvement of the oxidation resistance of Al{sub x}Cr{sub 1-x}N coatings by the addition of Si. The results show that Si promotes the formation of a dense coating morphology as well as a dense oxide scale when exposed to air.

  5. Microstructure and Mechanical Properties of n-irradiated Fe-Cr Model Alloys

    SciTech Connect (OSTI)

    Matijasevic, Milena; Al Mazouzi, Abderrahim [Reactor materials research, SCK-CEN, Mol (Belgium)

    2008-07-01T23:59:59.000Z

    High chromium ( 9-12 wt %) ferritic/martensitic steels are candidate structural materials for future fusion reactors and other advanced systems such as accelerator driven systems (ADS). Their use for these applications requires a careful assessment of their mechanical stability under high energy neutron irradiation and in aggressive environments. In particular, the Cr concentration has been shown to be a key parameter to be optimized in order to guarantee the best corrosion and swelling resistance, together with the least embrittlement. In this work, the characterization of the neutron irradiated Fe-Cr model alloys with different Cr % with respect to microstructure and mechanical tests will be presented. The behavior of Fe-Cr alloys have been studied using tensile tests at different temperature range ( from -160 deg. C to 300 deg. C). Irradiation-induced microstructure changes have been studied by TEM for two different irradiation doses at 300 deg. C. The density and the size distribution of the defects induced have been determined. The tensile test results indicate that Cr content affects the hardening behavior of Fe-Cr binary alloys. Hardening mechanisms are discussed in terms of Orowan type of approach by correlating TEM data to the measured irradiation hardening. (authors)

  6. Broadband Lg Attenuation Modeling in the Middle East

    SciTech Connect (OSTI)

    Pasyanos, M E; Matzel, E M; Walter, W R; Rodgers, A J

    2008-08-21T23:59:59.000Z

    We present a broadband tomographic model of Lg attenuation in the Middle East derived from source- and site-corrected amplitudes. Absolute amplitude measurements are made on hand-selected and carefully windowed seismograms for tens of stations and thousands of crustal earthquakes resulting in excellent coverage of the region. A conjugate gradient method is used to tomographically invert the amplitude dataset of over 8000 paths over a 45{sup o} x 40{sup o} region of the Middle East. We solve for Q variation, as well as site and source terms, for a wide range of frequencies ranging from 0.5-10 Hz. We have modified the standard attenuation tomography technique to more explicitly define the earthquake source expression in terms of the seismic moment. This facilitates the use of the model to predict the expected amplitudes of new events, an important consideration for earthquake hazard or explosion monitoring applications. The attenuation results have a strong correlation to tectonics. Shields have low attenuation, while tectonic regions have high attenuation, with the highest attenuation at 1 Hz is found in eastern Turkey. The results also compare favorably to other studies in the region made using Lg propagation efficiency, Lg/Pg amplitude ratios and two-station methods. We tomographically invert the amplitude measurements for each frequency independently. In doing so, it appears the frequency-dependence of attenuation is not compatible with the power law representation of Q(f), an assumption that is often made.

  7. Oil and gas development in Middle East in 1987

    SciTech Connect (OSTI)

    Hemer, D.O.; Gohrbandt, K.H.A.; Phillips, C.B.

    1988-10-01T23:59:59.000Z

    Petroleum production in Middle East countries during 1987 totaled an estimated 4,500,500,000 bbl (an average rate of 12,330,137 b/d), up slightly from the revised 1986 total of 4,478,972,000 bbl. Iran, Iraq, Syria, and Yemen Arab Republic had significant increases; Kuwait and Saudi Arabia had significant decreases. Production was established for the first time in People's Democratic Republic of Yemen. New fields went on production in Iraq, Oman, People's Democratic Republic of Yemen, and Syria, and significant oil discoveries were reported in Iraq, Oman, People's Democratic Republic of Yemen, Syria, and Yemen Arab Republic. The level of exploration increased in 1987 with new concessions awarded in some countries, drilling and seismic activities on the increase, new regions in mature areas explored for the first time, and significant reserve additions reported in new and old permits. The Iraq-Iran war still had a negative impact in some regions of the Middle East, particularly in and around the Gulf. 11 figs., 4 tabs.

  8. A middle path for electricity options and sustainable development

    SciTech Connect (OSTI)

    Mills, J.I.; Herring, J.S.

    1994-12-31T23:59:59.000Z

    In a landmark article in Foreign Affairs in October 1976, Amory Lovins presented his vision of two vastly different and seemingly irreconcilable paths that energy provision might take into the future. One path was a ``hard`` path, characterized by extensive development of large, capital-intensive centralized electrical generating facilities and their peripherals, designed with little consideration given to the matching of these facilities to the requirements of the end-use needs. The second, ``soft`` path was characterized by energy technologies that are diverse, operate on renewable energy flows, are relatively simple, less capital-intensive, and matched in scale and energy quality to end-use needs. One of the most controversial arguments in the Lovins` paper was that the ``hard`` and ``soft`` paths are culturally and institutionally antagonistic. In retrospect, it seems this argument was self-fulfilling, for the history of the energy debate throughout the developed world since the appearance of the Lovins` article has been marked by an either-or antagonism that has left little room for serious discussion of a ``middle-path.`` In this paper, we argue that ``middle-path,`` paved with elements of both the soft and hard, is especially suited for developing countries, since they do not now carry the burden of an existing and extensive ``hard path`` energy infrastructure.

  9. E-Print Network 3.0 - acute middle cerebral Sample Search Results

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

    inflation factors VMCA mean basal middle cerebral artery blood flow... Non-invasive near infrared spectroscopy: a tool for measuring cerebral ... Source: University College London...

  10. E-Print Network 3.0 - artery-middle cerebral artery Sample Search...

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

    to the brain Summary: ;Anterior cerebral artery Internal carotid artery Basilar artery Middle cerebral artery Vertebral artery... Anterior cerebral artery Posterior cerebral ......

  11. E-Print Network 3.0 - area middle fork Sample Search Results

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

    Summary: Middle Fork Coyote Creek (8286 Acres) Santa Clara County 2205300104 Kelly Cabin Canyon (4283 Acres... Berryessa EastForkCoyote Cow Calera Penitencia LasAnimas Arroyo...

  12. Reservoir Characterization and Enhanced Oil Recovery Potential in Middle Devonian Dundee Limestone Reservoirs, Michigan Basin, USA.

    E-Print Network [OSTI]

    Abduslam, Abrahim

    2012-01-01T23:59:59.000Z

    ?? Middle Devonian Rogers City and subjacent Dundee Limestone formations have combined oil production in excess of 375 MMBO. In general, hydrocarbon production occurs in… (more)

  13. Annual Energy Consumption Analysis Report for Richland Middle School

    SciTech Connect (OSTI)

    Liu, Bing

    2003-12-18T23:59:59.000Z

    Richland Middle School is a single story, 90,000 square feet new school located in Richland, WA. The design team proposed four HVAC system options to serve the building. The proposed HVAC systems are listed as following: (1) 4-pipe fan coil units served by electrical chiller and gas-fired boilers, (2) Ground-source closed water loop heat pumps with water loop heat pumps with boiler and cooling tower, and (3) VAV system served by electrical chiller and gas-fired boiler. This analysis estimates the annual energy consumptions and costs of each system option, in order to provide the design team with a reasonable basis for determining which system is most life-cycle cost effective. eQuest (version 3.37), a computer-based energy simulation program that uses the DOE-2 simulation engine, was used to estimate the annual energy costs.

  14. Middle East: Iran isn't missed much

    SciTech Connect (OSTI)

    Not Available

    1980-08-15T23:59:59.000Z

    A concerted effort to further develop productive capacity is evident in most Middle Eastern Countries, through exploration, field development, and secondary recovery. Saudi Arabia, Iraq, and Abu Dhabi all plan expanded petroleum industry programs in 1980. Oil production in Saudi Arabia through the first one-half of 1980 averaged 9.5 million bpd, and the Saudis are proceeding with the large-scale associated gas utilization and industrialization program. Iraq's near-term interest is in development of the Majnoon Discovery. Abu Dhabi is continuing efforts to complete development of a giant offshore field and finalize an onshore/offshore associated gas utilization facility. Only Iran and Kuwait are expected to be relatively inactive in petroleum programs during the remainder of 1980. Individual country reports are presented for Saudi Arabia, Iraq, Abu Dhabi, Dubai, Iran, Kuwait, the Divided Neutral Zone, Qatar, Oman, Bahrain, Syria, Turkey, Israel, Jordan, South Yemen, and Yemen Arab Republic.

  15. Detection of charge transfer processes in Cr-doped SrTiO{sub 3} single crystals

    SciTech Connect (OSTI)

    La Mattina, F. [Physik-Institut der Universitaet Zuerich, Winterthurerstr. 190, CH-8057 Zuerich (Switzerland); IBM Research, Zurich Research Laboratory, Saeumerstr. 4, CH-8803 Rueschlikon (Switzerland); Bednorz, J. G.; Alvarado, S. F. [IBM Research, Zurich Research Laboratory, Saeumerstr. 4, CH-8803 Rueschlikon (Switzerland); Shengelaya, A. [Physics Institute of Tbilisi State University, Chavchavadze 3, GE-0128, Tbilisi (Georgia); Keller, H. [Physik-Institut der Universitaet Zuerich, Winterthurerstr. 190, CH-8057 Zuerich (Switzerland)

    2008-07-14T23:59:59.000Z

    An insulator-to-metal transition is observed in Cr-doped SrTiO{sub 3} single crystals upon extended exposure to a high electric field, namely, electroconditioning (EC). Electron paramagnetic resonance (EPR) and transport measurements under laser irradiation show anticorrelation between the Cr{sup 3+} EPR signal and the electrical current. This proves that the Cr{sup 3+} ions are responsible for the photocurrent that initiates the EC process. We observe the presence of Cr{sup 3+}/Cr{sup 4+} mixed valencies in the bulk in the conducting state. The EPR characterization of the spectra in the conducting state excludes the possibility of a Cr{sup 3+}-oxygen vacancy complex in the bulk as a result of the EC.

  16. Comparative studies of etching mechanisms of CR-39 in NaOH/H2O and NaOH/ethanol

    E-Print Network [OSTI]

    Yu, K.N.

    Comparative studies of etching mechanisms of CR-39 in NaOH/H2O and NaOH/ethanol K.C.C. Tse, D Avenue, Kowloon Tong, Hong Kong Available online 13 May 2007 Abstract The bulk etch rate for CR-39 in NaOH/ethanol accumulates on the surface of CR-39 detector during etching in NaOH/ethanol, which is absent during etching

  17. Marketing Compost A Guide for Compost Producers in Low and Middle-Income Countries

    E-Print Network [OSTI]

    Wehrli, Bernhard

    Marketing Compost A Guide for Compost Producers in Low and Middle-Income Countries Sandec #12;Marketing Compost A Guide for Compost Producers in Low and Middle-Income Countries Jonathan Rouse Introduction 7 2 Background 11 2.1 What is marketing? 11 2.2 Why is marketing important for compost producers

  18. Democratising the Neighbourhood: The Implications of the Arab Spring for the Middle East and Asia

    E-Print Network [OSTI]

    Professor Abdulkhaleq Abdulla United Arab Emirates University Chair: Professor Robert Bowker 1045Democratising the Neighbourhood: The Implications of the Arab Spring for the Middle East and Asia Canberra, 9-10 December 2011 Centre for Arab and Islamic Studies (The Middle East and Central Asia

  19. Roadmap: Middle Childhood Mathematics and Science Bachelor of Science in Education

    E-Print Network [OSTI]

    Sheridan, Scott

    Roadmap: Middle Childhood ­ Mathematics and Science ­ Bachelor of Science in Education [EH Catalog Year: 2013-2014 Page 1 of 3 | Last Updated: 20-Aug-13/JS This roadmap is a recommended semester Laboratory or GEOL 11042 Earth History and GEOL 11043 Earth History Laboratory 4 C #12;Roadmap: Middle

  20. Applying Time-Memory-Data Trade-Off to Meet-in-the-Middle Attack

    E-Print Network [OSTI]

    Applying Time-Memory-Data Trade-Off to Meet-in-the-Middle Attack Jiali Choy, Khoongming Khoo,kkhoongm,lchuanwe@dso.org.sg Abstract. In this paper, we present several new attacks on multiple encryption block ciphers based on the meet-in-the-middle attack. In the first attack (GDD-MTM), we guess a certain number of secret key bits

  1. Fish Assemblages and Substrates in the Middle Wabash River, USA Robert Mueller, Jr.1,2

    E-Print Network [OSTI]

    Pyron, Mark

    Fish Assemblages and Substrates in the Middle Wabash River, USA Robert Mueller, Jr.1,2 and Mark Pyron1 We collected fishes at 28 sites of the middle Wabash River, Indiana, using a boat electrofisher for fish assemblage variation that was explained by variation in water depth and substrate frequency

  2. A Hamilton Path Heuristic with Applications to the Middle Two Levels Problem

    E-Print Network [OSTI]

    Savage, Carla D.

    A Hamilton Path Heuristic with Applications to the Middle Two Levels Problem Ian Shields IBM P is to find a Hamilton cycle in the middle two levels, M 2k+1 , of the Hasse diagram of B 2k+1 (the partially. We show that if a Hamilton path between two distinguished vertices exists in a reduced graph

  3. Void swelling in binary Fe-Cr alloys at 200 dpa

    SciTech Connect (OSTI)

    Gelles, D.S. [Pacific Northwest Lab., Richland, WA (United States)

    1994-09-01T23:59:59.000Z

    Microstructural examinations have been performed on a series of binary Fe-Cr alloys irradiated in the FFTF/MOTA at 425{degrees}C to 200 dpa. The data represent the highest swelling levels reported in neutron irradiated ferritic alloys. The alloy compositions ranged from 3% to 18% Cr in 3% Cr increments, and the irradiation temperature corresponded to the peak swelling condition for this alloy class. Density measurements showed swelling levels as high as 7.4%, with the highest swelling found in the Fe-9Cr and Fe-6Cr alloys. Microstructural examinations revealed that the highest swelling conditions contained well-developed voids, often as large as 100 nm, and a dislocation network comprised of both a/2<111> and a<100> Burgers vectors. Swelling was lower in the other alloys, and the swelling reduction could be correlated with increased precipitation. These results are considered in light of the current theories for low swelling in ferritic alloys, but no theory is available to completely explain the results.

  4. Void swelling in binary Fe-Cr alloys at 200 DPA

    SciTech Connect (OSTI)

    Gelles, D.S.

    1994-06-01T23:59:59.000Z

    Microstructural examinations have been performed on a series of binary Fe-Cr alloys irradiated in the FFTF/MOTA at 425C to 200 dpa. The data represent the highest swelling levels reported in neutron irradiated ferritic alloys. The alloy compositions ranged from 3 to 18% Cr in 3% Cr increments, and the irradiation temperature corresponded to the peak swelling condition for this alloy class. Density measurements showed swelling levels as high as 7.4%, with the highest swelling found in the Fe-9Cr and Fe-6Cr alloys. Microstructural examinations revealed that the highest swelling conditions contained well-developed voids, often as large as 100 nm, and a dislocation network comprised of both {sub 2}{sup a}<111> and a<100> Burgers vectors. Swelling was lower in the other alloys, and the swelling reduction could be correlated with increased precipitation. These results are considered in light of current theories for low swelling in ferritic alloys, but no theory is available to completely explain the results.

  5. Reduced-activation austenitic stainless steels: The Fe--Mn--Cr--C system

    SciTech Connect (OSTI)

    Klueh, R.L.; Maziasz, P.J.

    1988-01-01T23:59:59.000Z

    Nickel-free manganese-stabilized steels are being developed for fusion-reactor applications. As the first part of this effort, the austenite-stable region in the Fe--Mn--Cr--C system was determined. Results indicated that the Schaeffler diagram developed for Fe--Ni--Cr--C alloys cannot be used to predict the constituents expected for high-manganese steels. This is true because manganese is not as strong an austenite stabilizer relative to delta-ferrite formation as predicted by the diagram, but it is a stronger austenite stabilizer relative to martensite than predicted. Therefore, the austenite-stable region for Ne--Mn--Cr--C alloys occurs at lower chromium and hugher combinations of manganese and carbon than predicted by the Schaeffler diagram. Development of a manganese-stabilized stainless steel should be possible in the composition range of 20 to 25% Mn, 10 to 15% Cr, and 0.01 to 0.25%C. Tensile behavior of an Fe--20%Mn--12%Cr--0.25%C alloy was determined. The strength and ductility of this possible base composition was comparable to type 316 stainless steel in both the solution-annealed and cold-worked condition.

  6. Recent developments in Cr{sup 2+}-doped II-VI compound lasers

    SciTech Connect (OSTI)

    Page, R.H.; DeLoach, L.D.; Schaffers, K.I., Patel, F.D.; Beach, R.J.; Payne, S.A.; Krupke, W.F. [Lawrence Livermore National Lab., CA (United States); Burger, A. [Fisk Univ., Nashville, TN (United States). Center for Photonic Materials and Devices

    1996-09-01T23:59:59.000Z

    Transition-metal-doped zinc chalcogenide crystals have recently been investigated as potential mid-IR lasers. Tetrahedrally-coordinated Cr{sup 2+} ions are especially attractive as lasants on account of high luminescence quantum yields for emission in the 2000-3000 nm range. {sup 5}E radiative lifetimes and emission cross sections are respectively {approximately}10 {mu}sec and {approximately}10{sup -18} cm{sup 2}. The associated absorption band peaked at {approximately}1800 nm enables laser-diode pumping of the Cr{sup 2+} systems. Laser demonstrations with ZnS:Cr and ZnSe:Cr (using a MgF{sub 2}:Co{sup 2+} laser pump source) gave slope efficiencies up to 30%. Excited-state-absorption losses appear small, and passive losses dominate. Tuning experiments with a birefringent filter evidence a tuning range covering at least 2280 - 2530 nm. Cr-doped laser samples can be produced by Bridgman growth, seeded physical vapor transport, or diffusion doping.

  7. Visible Light-Driven Water Oxidation by Ir oxide Clusters Coupledto Single Cr Centers in Mesoporous Silica

    SciTech Connect (OSTI)

    Nakamura, Ryuhei; Frei, Heinz

    2006-07-10T23:59:59.000Z

    Visible light-induced water oxidation has been demonstrated at an Ir oxide nanocluster coupled to a single Cr{sup VI} site on the pore surface of MCM-41 mesoporous silica. The photocatalytic unit was assembled by the reaction of surface Cr=O groups with Ir(acac){sub 3} precursor followed by calcination at 300 C and bond formation monitored by FT-Raman and FT-IR spectroscopy. High-resolution Z-contrast electron micrographs of the calcined material combined with energy-dispersive X-ray spot analysis confirmed the occlusion of Ir oxide nanoparticles inside the mesopores. Oxygen evolution of an aqueous suspension of the Ir{sub x}O{sub y}-CrMCM-41 upon visible light irradiation of the Cr{sup VI}-O ligand-to-metal charge-transfer absorption was monitored mass-spectrometrically. Comparison of the product yields for samples with low Cr content (Cr/Si {le} 0.02) and high Cr content (Cr/Si = 0.05) indicates that only isolated Cr centers are capable of extracting electrons from Ir oxide clusters, while di- or polychromate species are not. Water oxidation at a multielectron-transfer catalyst coupled to a single metal center has not been demonstrated before. The ability to drive water oxidation with a single metal center as electron pump offers opportunities for coupling the oxygen-evolving photocatalytic unit to reducing sites in the nanoporous scaffold.

  8. Reduction of Cr(VI) under acidic conditions by the facultative Fe(III)-reducing bacterium Acidiphilium cryptum

    SciTech Connect (OSTI)

    David E. Cummings; Scott Fendorf; Rajesh K. Sani; Brent M. Peyton; Timothy S. Magnuson

    2007-01-01T23:59:59.000Z

    The potential for biological reduction of Cr(VI) under acidic conditions was evaluated with the acidophilic, facultatively metal-reducing bacterium Acidiphilium cryptum strain JF-5 to explore the role of acidophilic microorganisms in the Cr cycle in low-pH environments. An anaerobic suspension of washed A. cryptum cells rapidly reduced 50 M Cr(VI) at pH 3.2; biological reduction was detected from pH 1.7-4.7. The reduction product, confirmed by XANES analysis, was entirely Cr(III) that was associated predominantly with the cell biomass (70-80%) with the residual residing in the aqueous phase. Reduction of Cr(VI) showed a pH optimum similar to that for growth and was inhibited by 5 mM HgCl2, suggesting that the reaction was enzyme-mediated. Introduction of O2 into the reaction medium slowed the reduction rate only slightly, whereas soluble Fe(III) (as ferric sulfate) increased the rate dramatically, presumably by the shuttling of electrons from bioreduced Fe(II) to Cr(VI) in a coupled biotic-abiotic cycle. Starved cells could not reduce Cr(VI) when provided as sole electron acceptor, indicating that Cr(VI) reduction is not an energy-conserving process in A. cryptum. We speculate, rather, that Cr(VI) reduction is used here as a detoxification mechanism.

  9. Dissimilar-weld failure analysis and development. Comparative behavior of similar and dissimilar welds. Final report. [Welds of 2-1/4Cr-1Mo to 2-1/4Cr-1Mo using 2-1/4Cr-1Mo filler material; and austenitic to ferritic steel welds made by fusion welding alloy-800H to 2-1/4Cr-1Mo using nickel base filler metal ERNiCr-3

    SciTech Connect (OSTI)

    Busboom, H.; Ring, P.J.

    1986-07-01T23:59:59.000Z

    The 593/sup 0/C (1100/sup 0/F) stress rupture behavior of similar metal welds (SMWs) and dissimilar metal welds (DMWs) was investigated under cyclic load and cyclic temperature conditions to provide insight into the question, ''Why do DMWs fail sooner than SMWs in the fossil fuel boilers.'' The weld joints of interest were an all ferritic steel SMW made by fusion welding 2-1/4Cr-1Mo to 2-1/4Cr-1Mo using 2-1/4Cr-1Mo filler metal and an austenitic to ferritic steel DMW made by fusion welding Alloy-800H to 2-1/4Cr-1Mo using a nickel base filler metal ERNiCr-3. The stress rupture behavior obtained on cross weld specimens was similar for both types of welds with only a 20% reduction in rupture life for the DMW. For rupture times less than 1500 hours, failures occurred in the 2-1/4Cr-1Mo base metal whereas, for rupture times greater than 1500 hours, failures occurred in the 2-1/4Cr-1Mo heat affected zone (HAZ). The HAZ failures exhibited a more brittle appearance than the base metal failures for both types of welds and it appears that the life of both joints was limited by the stress rupture properties of the HAZ. These results support the hypothesis that increased residual stresses due to abrupt changes in hardness (strength) of metals involved are the major contributors to the reduction in life of DMWs as compared to SMWs. 10 refs., 15 figs., 7 tabs.

  10. CrRb: A molecule with large magnetic and electric dipole moments

    SciTech Connect (OSTI)

    Pavlovic, Z. [ITAMP, Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138 (United States); Department of Physics, University of Connecticut, Storrs, Connecticut 06269-3046 (United States); Sadeghpour, H. R. [ITAMP, Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138 (United States); Cote, R. [Department of Physics, University of Connecticut, Storrs, Connecticut 06269-3046 (United States); Roos, B. O. [Department of Theoretical Chemistry, University of Lund, S-221 00 Lund (Sweden)

    2010-05-15T23:59:59.000Z

    We report calculations of Born-Oppenheimer potential energy curves of the chromium-rubidium heteronuclear molecule ({sup 52}Cr{sup 87}Rb), and the long-range dispersion coefficient for the interaction between ground state Cr and Rb atoms. Our calculated van der Waals coefficient (C{sub 6}=1770 a.u.) has an expected error of 3%. The ground state {sup 6{Sigma}+} molecule at its equilibrium separation has a permanent electric dipole moment of d{sub e}(R{sub e}=3.34Angstrom)=2.90 D. We investigate the hyperfine and dipolar collisions between trapped Cr and Rb atoms, finding elastic to inelastic cross section ratio of 10{sup 2}-10{sup 3}.

  11. Testing of welded 13% Cr grades martensitic stainless steels for sour service applications

    SciTech Connect (OSTI)

    Rogne, T.; Bjordal, M. [SINTEF Materials Technology, Trondheim (Norway)

    1997-08-01T23:59:59.000Z

    The application of 13% Cr grade stainless steels is increasing mainly due to the introduction of higher alloyed and weldable grades with carbon content as low as 0.01 %, and the very favorable costs compared to alternative materials as the 22Cr duplex stainless steel. Therefore these steels now have been subject to a major evaluation for transport of oil and gas offshore in the North Sea. This paper discusses aspects of testing required to assess their corrosion properties and their susceptibility to environment assisted cracking (EAC), caused by both H{sub 2}S internally and cathodic protection externally. Testing is discussed with emphasis on test parameters for welded 13% Cr steel using different types of consumables.

  12. The Effect of Water Vapor on Cr Depletion in Advanced Recuperator Alloys

    SciTech Connect (OSTI)

    Pint, Bruce A [ORNL

    2005-01-01T23:59:59.000Z

    Durable alloy foils are needed for gas turbine recuperators operating at 650--700 C. It has been established that water vapor in the exhaust gas causes more rapid consumption of Cr in austenitic stainless steels leading to a reduction in operating lifetime of these thin-walled components. Laboratory testing at 650--800 C of commercial and model alloys is being used to develop a better understanding of the long-term rate of Cr consumption in these environments. Results are presented for commercial alloys 709, 120 and 625. After 10,000h exposures at 650 C and 700 C in humid air, grain boundary Cr depletion was observed near the surface of all these materials. In the Fe-base alloys, 709 and 120, this depletion led to localized Fe-rich nodule formation. This information then can be used to develop low-cost alternatives to currently available candidate materials.

  13. Precipitation behavior of Ni-Cr-22 Fe-18 Mo (Hastelloy-X) and Ni-Cr-22 Co-12 Mo (Inconel-617) after isothermal aging

    SciTech Connect (OSTI)

    Kirchhofer, H.; Nickel, H.; Schubert, F.

    1984-07-01T23:59:59.000Z

    The precipitation behavior of the nickel-base alloys Ni-Cr-22Fe-18Mo (Hastelloy-X) and Ni-Cr-22Co12Mo (Inconel-617) has been investigated as a function of aging temperature. Hastelloy-X shows that M/sub 6/C and TiN are primary precipitates and M/sub 12/C, A/sub 3/B/sub 2/ (approx. = Fe/sub 3/Mo/sub 2/), and M/sub 23/C/sub 6/ are secondary precipitates, while Inconel-617 also has M/sub 6/C and TiN as primary precipitates and M/sub 23/C/sub 6/, M/sub 12/C, and Ni/sub 3/AlTi as secondary precipitates. The characterization has been carried out by metallographic and transmission electron microscopy investigations and by x-ray examinations of electrochemical isolated precipitates.

  14. /sup 51/Cr-EDTA: a marker of early intestinal rejection in the rat

    SciTech Connect (OSTI)

    Grant, D.; Lamont, D.; Zhong, R.; Garcia, B.; Wang, P.; Stiller, C.; Duff, J.

    1989-05-01T23:59:59.000Z

    Intestinal permeability was studied after accessory intestinal transplantation in Lewis rats. Five groups were evaluated: Group 1--isografts (N = 6); Group 2--Lewis X Brown Norway F1 (LBN-F1) allografts (N = 6); Group 3--isografts treated with CsA 2 mg/kg/day X 10 days (N = 6); Group 4--LBN-F1 allografts treated with CsA 2 mg/kg/day X 10 days (N = 6); Group 5--LBN-F1 allografts treated with CsA 4 mg/kg/day X 28 days (N = 6). Chromium-labeled ethylenedimianetetraacetate (/sup 51/Cr-EDTA) was given through the proximal stoma of the graft. Renal clearance of /sup 51/Cr-EDTA and mucosal biopsies were followed post-transplant. The biopsies of the intestinal graft showed no rejection in Groups 1, 3, and 5; fulminant rejection in Group 2; and mild atypical rejection in Group 4. /sup 51/Cr-EDTA clearance was elevated in all groups during the first 7 days post-transplant. Thereafter, /sup 51/Cr-EDTA excretion fell to lower levels in the animals with histologically normal grafts (Groups 1, 3, and 5). /sup 51/Cr-EDTA excretion in Group 4 was increased with the first histological evidence of rejection on Day 14 and remained elevated until sacrifice (P less than 0.02 compared to Groups 3 and 5). A transient permeability defect occurs after intestinal grafting. Once the graft has recovered from this injury, /sup 51/Cr-EDTA is a sensitive marker for intestinal rejection.

  15. Magnetic and electrical properties of layered magnets Tl(Cr,Mn,Co)Se{sub 2}

    SciTech Connect (OSTI)

    Veliyev, R. G.; Sadikhov, R. Z.; Kerimova, E. M., E-mail: ekerimova@physics.ab.az; Asadov, Yu. G.; Jabbarov, A. I. [National Academy of Sciences of Azerbaijan, Institute of Physics (Azerbaijan)

    2009-02-15T23:59:59.000Z

    Tl(Cr,Mn,Co)Se{sub 2} crystals were synthesized at T {approx} 1050 K. X-ray diffraction analysis showed that TlCrSe{sub 2}, TlMnSe{sub 2}, and TlCoSe{sub 2} compounds crystallize in the hexagonal crystal system with the lattice parameters: a = 3.6999 A, c = 22.6901 A, c/a {approx} 6.133, z = 3, {rho}{sub x} = 6.209 g/cm{sup 3}; a = 6.53 A, c = 23.96 A, c/a {approx} 3.669, z = 8, {rho}{sub x} = 6.71 g/cm{sup 3}; and a = 3.747 A, c = 22.772 A, c/a {approx} 6.077, z = 3, {rho}{sub x} = 7.577 g/cm{sup 3}, respectively. Magnetic and electrical studies in the temperature range from 80-400 K showed that TlCrSe{sub 2} is a semiconductor ferromagnet, TlMnSe{sub 2} is a semiconductor antiferromagnet, and TlCoSe{sub 2} is a ferrimagnet with a conductivity characteristic of metals. A rather large deviation in the experimental effective magnetic moment for TlCrSe{sub 2} (3.05 {mu}B) from the theoretical value (3.85 {mu}B) is attributed to two-dimensional magnetic ordering in the paramagnetic region of the noticeably layered ferromagnet TlCrSe{sub 2}. In TlCrSe{sub 2}, a correlation between magnetic and electrical properties was detected.

  16. Toughness of Cr-Mo-V steels for steam-turbine rotors

    SciTech Connect (OSTI)

    Viswanathan, R.; Jaffee, R.I.

    1982-04-01T23:59:59.000Z

    Cr-Mo-V steels are used extensively as the rotor material in the High Pressure and Intermediate Pressure Sections of modern steam turbines. The toughness of these rotors has a major influence on the reliability and efficiency of the turbine and the overall economy of operation and maintenance of the plant. The metallurgical factors affecting the toughness of the rotors and the methods to improve the toughness are now understood better than ever before. This paper will present a broad overview of the materials and design aspects of the toughness of Cr-Mo-V rotors with emphasis on the salient results of recent research programs aimed at improving their toughness.

  17. Repassivation of 13% Cr steel dependent on brine pH

    SciTech Connect (OSTI)

    Skogsberg, J.W.; Walker, M.L.

    2000-02-01T23:59:59.000Z

    A joint laboratory project, involving an oil production and oil well service company, investigated repassivation of martensitic 13% Cr steel. The rate at which this alloy is repassivated after losing its protective passive oxide layer to hydrochloric acid (HCI) depended on the pH of the spent acid returns. Test samples of 13% Cr cut from oilfield tubing were subjected to a fluid sequence of (1) initial brine, (2) HCI, (3) spent acid, and (4) final brine. In 9 days, the samples regained their passive oxide layers. When spent acid was taken out of the fluid sequence, the samples regained passive oxide layers in 3 days.

  18. Can one identify the intrinsic structure of the yrast states in $^{48}$Cr after the backbending?

    E-Print Network [OSTI]

    Gao, Zao-Chun; Chen, Y S; Chen, Y J; Tuya,

    2010-01-01T23:59:59.000Z

    The backbending phenomenon in $^{48}$Cr has been investigated using the recently developed Projected Configuration Interaction (PCI) method, in which the deformed intrinsic states are directly associated with shell model (SM) wavefunctions. Two previous explanations, (i) $K=0$ band crossing, and (ii) $K=2$ band crossing have been reinvestigated using PCI, and it was found that both explanations can successfully reproduce the experimental backbending. The PCI wavefunctions in the pictures of $K=0$ band crossing and $K=2$ band crossing are highly overlapped. We conclude that there are no unique intrinsic states associated with the yrast states after backbending in $^{48}$Cr.

  19. Can one identify the intrinsic structure of the yrast states in $^{48}$Cr after the backbending?

    E-Print Network [OSTI]

    Zao-Chun Gao; Mihai Horoi; Y. S. Chen; Y. J. Chen; Tuya

    2010-08-02T23:59:59.000Z

    The backbending phenomenon in $^{48}$Cr has been investigated using the recently developed Projected Configuration Interaction (PCI) method, in which the deformed intrinsic states are directly associated with shell model (SM) wavefunctions. Two previous explanations, (i) $K=0$ band crossing, and (ii) $K=2$ band crossing have been reinvestigated using PCI, and it was found that both explanations can successfully reproduce the experimental backbending. The PCI wavefunctions in the pictures of $K=0$ band crossing and $K=2$ band crossing are highly overlapped. We conclude that there are no unique intrinsic states associated with the yrast states after backbending in $^{48}$Cr.

  20. Microstructure and High Temperature Oxidation Behavior of Cr-W Alloys

    SciTech Connect (OSTI)

    Dogan, O.N.

    2007-02-01T23:59:59.000Z

    Cr alloys containing 0-30%W by weight were investigated for use in elevated temperature applications. The alloys were melted in a water-cooled, copper-hearth arc furnace. Microstructure of the alloys was characterized using x-ray diffraction, scanning electron microscopy, and light microscopy. A pseudocyclic oxidation test was employed to study scale formation at 1000ºC in dry air. The scale was predominantly chromia and spalled upon cooling. Alloying with aluminum up to 8 weight percent reduced the spalling drastically. Furthermore, aluminizing the surface of the Cr-W alloys completely stopped the spalling.

  1. Anodonta imbecillis QA Test 4, Clinch River - Environmental restoration program (CR-ERP)

    SciTech Connect (OSTI)

    Simbeck, D.J.

    1997-06-01T23:59:59.000Z

    Toxicity testing of split whole sediment samples using juvenile freshwater mussels (Anodonta imbecillis) was conducted by TVA to provide a quality assurance mechanism for test organism quality and overall performance of the test being conducted by CR-ERP personnel as part of the CR-ERP biomonitoring study of Clinch River sediments. Testing of sediment samples collected September 8 from Poplar Creek Miles 6.0 and 1.0 was conducted September 13-22, 1994. Results from this test showed no toxicity (survival effects) to fresh-water mussels during a 9-day exposure to the sediments.

  2. Audit Report: CR-B-97-01 | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energyon ArmedWaste andAccess to OUO AccessOpportunity | Department7-26CR-B-95-06CR-B-97-01

  3. Audit Report: CR-B-99-02 | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energyon ArmedWaste andAccess to OUO AccessOpportunity |Report: CR-B-97-04 AuditCR-B-99-02

  4. Audit Report: CR-MA-95-02 | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustionImprovement3--Logistical5/08 Attendance List from 12/05/08CR-MA-95-02 Audit Report: CR-MA-95-02

  5. Kinetics and thermodynamics of hydrotreating synthetic middle distillates

    SciTech Connect (OSTI)

    Fisher, I.P. (Petro-Canada R and D Dept., Sheridan Park, Ontario (Canada)); Wilson, M.F. (CANMET, Ottawa, Ontario (Canada))

    1987-04-01T23:59:59.000Z

    Middle distillates from the Tar Sands deposits in Alberta are an important component of diesel and jet fuels in the Canadian market. Commercial catalysts based on sulfided Ni-Mo and Ni-W are currently used to hydrogenate synthetic distillates to improve the cetane number and smoke point. In previous work {sup 13}C NMR was used to study the kinetics of overall hydrogenation of aromatics over sulfided Co-Mo, Ni-Mo and Ni-W catalysts. Arrhenius parameters were obtained for hydrogenation over sulfided Ni-W catalyst for a similar distillate feedstock. In the latter study, mass spectrometry was used to quantitate the three major aromatic hydrocarbon group types in the feed and products. In this study, liquid products from hydrotreating experiments with a hydrotreated distillate from delayed coking of Athabasca bitumen and sulfided Co-Mo and Ni-Mo catalysts have been analyzed by mass spectrometry. This completes a preliminary comparison of the kinetics of hydrogenation of alkylbenzenes, benzocycloparaffins and benzodicycloparaffins, the three major aromatic hydrocarbon types in these distillates.

  6. Collective efficacy as identified by teachers at Heritage Middle School, East Central Independent School District, San Antonio, Texas

    E-Print Network [OSTI]

    Naumann, Luisa Maria

    2008-10-10T23:59:59.000Z

    the students at Heritage Middle School successful. iv The second question studied was, “What is the relationship between selected demographic variables and the perceptions of the teachers regarding collective efficacy at Heritage Middle School, East Central... Based on Ethnicity ............................................................................................. 64 10 Independent Samples t-test of the White and Hispanic Teachers From Heritage Middle School in the Perceived Collective Efficacy Survey...

  7. Understanding the solidification and microstructure evolution during CSC-MIG welding of Fe–Cr–B-based alloy

    SciTech Connect (OSTI)

    Sorour, A.A., E-mail: ahmad.sorour@mail.mcgill.ca; Chromik, R.R., E-mail: richard.chromik@mcgill.ca; Gauvin, R., E-mail: raynald.gauvin@mcgill.ca; Jung, I.-H., E-mail: in-ho.jung@mcgill.ca; Brochu, M., E-mail: mathieu.brochu@mcgill.ca

    2013-12-15T23:59:59.000Z

    The present is a study of the solidification and microstructure of Fe–28.2%Cr–3.8%B–1.5%Si–1.5%Mn (wt.%) alloy deposited onto a 1020 plain carbon steel substrate using the controlled short-circuit metal inert gas welding process. The as-solidified alloy was a metal matrix composite with a hypereutectic microstructure. Thermodynamic calculation based on the Scheil–Gulliver model showed that a primary (Cr,Fe){sub 2}B phase formed first during solidification, followed by an eutectic formation of the (Cr,Fe){sub 2}B phase and a body-centered cubic Fe-based solid solution matrix, which contained Cr, Mn and Si. Microstructure analysis confirmed the formation of these phases and showed that the shape of the (Cr,Fe){sub 2}B phase was irregular plate. As the welding heat input increased, the weld dilution increased and thus the volume fraction of the (Cr,Fe){sub 2}B plates decreased while other microstructural characteristics were similar. - Highlights: • We deposit Fe–Cr–B-based alloy onto plain carbon steel using the CSC-MIG process. • We model the solidification behavior using thermodynamic calculation. • As deposited alloy consists of (Cr,Fe){sub 2}B plates embedded in Fe-based matrix. • We study the effect of the welding heat input on the microstructure.

  8. Spin polarization at Fe/Cr interfaces L. Pizzagalli, M. Freyss, G. Moraitis, D. Stoeffler, C. Demangeat, and H. Dreysse

    E-Print Network [OSTI]

    Bayreuther, Günther

    configuration with zero net moment of a thin Fe layer on a Cr surface due to a high step density. © 1997.g., a zero net magnetic moment of a Cr layer grown on a stepped Fe surface.6 It will be shown below how some irregularities at the interfaces. The spin-polarized electronic charge distribution was calculated by using

  9. Changes induced in a ZnS:Cr-based electroluminescent waveguide structure by intrinsic near-infrared laser radiation

    SciTech Connect (OSTI)

    Vlasenko, N. A., E-mail: vlasenko@isp.kiev.ua; Oleksenko, P. F.; Mukhlyo, M. A.; Veligura, L. I. [National Academy of Sciences of Ukraine, Lashkarev Institute of Semiconductor Physics (Ukraine)] [National Academy of Sciences of Ukraine, Lashkarev Institute of Semiconductor Physics (Ukraine)

    2013-08-15T23:59:59.000Z

    The causes of changes that occur in a thin-film electroluminescent metal-insulator-semiconductor-insulator-metal waveguide structure based on ZnS:Cr (Cr concentration of {approx}4 Multiplication-Sign 10{sup 20} cm{sup -3}) upon lasing ({lambda} Almost-Equal-To 2.6 {mu}m) and that induce lasing cessation are studied. It is established that lasing ceases because of light-scattering inhomogeneities formed in the structure and, hence, optical losses enhance. The origin of the inhomogeneities and the causes of their formation are clarified by studying the surface topology and the crystal structure of constituent layers of the samples before and after lasing. The studies are performed by means of atomic force microscopy and X-ray radiography. It is shown that a substantial increase in the sizes of grains on the surface of the structure is the manifestation of changes induced in the ZnS:Cr film by recrystallization. Recrystallization is initiated by local heating by absorbed laser radiation in existing Cr clusters and quickened by a strong electric field (>1 MV cm{sup -1}). The changes observed in the ZnS:Cr film are as follows: the textured growth of ZnS crystallites, an increase in the content of Cr clusters, and the appearance of some CrS and a rather high ZnO content. Some ways for improving the stability of lasing in the ZnS:Cr-based waveguide structures are proposed.

  10. USE OF MICRO X-RAY ABSORPTION SPECTROSCOPY AND DIFFRACTION TO DELINEATE Cr(VI) SPECIATION IN COPR

    SciTech Connect (OSTI)

    CHRYSOCHOOU, M.; MOON, D. H.; FAKRA, S.; MARCUS, M.; DERMATAS, D.; CHRISTODOULATOS, C.

    2010-06-22T23:59:59.000Z

    The speciation of Cr(VI) in Cromite Ore Processing Residue was investigated by means of bulk XRD, and a combination of micro-XRF, -XAS and -XRD at the Advanced Light Source (ALS), Berkeley, CA, U.S.A.. Bulk XRD yielded one group of phases that contained explicitly Cr(VI) in their structure, Calcium Aluminum Chromium Oxide Hydrates, accounting for 60% of the total Cr(VI). Micro-analyses at ALS yielded complimentary information, confirming that hydrogarnets and hydrotalcites, two mineral groups that can host Cr(VI) in their structure by substitution, were indeed Cr(VI) sinks. Chromatite (CaCrO4) was also identified by micro-XRD, which was not possible with bulk methods due to its low content. The acquisition of micro-XRF elemental maps enabled not only the identification of Cr(VI)-binding phases, but also the understanding of their location within the matrix. This information is invaluable when designing Cr(VI) treatment, to optimize release and availability for reduction.

  11. Chromium(VI) bioremoval by pseudomonas bacteria: role of microbial exudates for natural attenuation and biotreatment of Cr(VI) contamination

    SciTech Connect (OSTI)

    Dogan, N.M.; Dodge, C.; Kantar, C.; Gulcan, S.; Yilmaz, B.C.; Mazmanci, M.A.

    2011-02-14T23:59:59.000Z

    Laboratory batch and column experiments were conducted to investigate the role of microbial exudates, e.g., exopolymeric substance (EPS) and alginic acid, on microbial Cr(VI) reduction by two different Pseudomonas strains (P. putida P18 and P. aeuroginosa P16) as a method for treating subsurface environment contaminated with Cr(VI). Our results indicate that microbial exudates significantly enhanced microbial Cr(VI) reduction rates by forming less toxic and highly soluble organo-Cr(III) complexes despite the fact Cr(III) has a very low solubility under the experimental conditions studied (e.g., pH 7). The formation of soluble organo-Cr(III) complexes led to the protection of the cells and chromate reductases from inactivation. In systems with no organic ligands, soluble organo-Cr(III) end products were formed between Cr(III) and the EPS directly released by bacteria due to cell lysis. Our results also provide evidence that cell lysis played an important role in microbial Cr(VI) reduction by Pseudomonas bacteria due to the release of constitutive reductases that intracellularly and/or extracellularly catalyzed the reduction of Cr(VI) to Cr(III). The overall results highlight the need for incorporation of the release and formation of organo-Cr(III) complexes into reactive transport models to more accurately design and monitor in situ microbial remediation techniques for the treatment of subsurface systems contaminated with Cr(VI).

  12. Chromium(VI) Bioremoval by Pseudomonas Bacteria: Role of Microbial Exudates for Natural Attenuation and Biotreatment of Cr(VI) Contamination

    SciTech Connect (OSTI)

    N Mercan Dogan; C Kantar; S Gulcan; C Dodge; B Coskun Yilmaz; M Ali Mazmanci

    2011-12-31T23:59:59.000Z

    Laboratory batch and column experiments were conducted to investigate the role of microbial exudates, e.g., exopolymeric substance (EPS) and alginic acid, on microbial Cr(VI) reduction by two different Pseudomonas strains (P. putida P18 and P. aeuroginosa P16) as a method for treating subsurface environment contaminated with Cr(VI). Our results indicate that microbial exudates significantly enhanced microbial Cr(VI) reduction rates by forming less toxic and highly soluble organo-Cr(III) complexes despite the fact Cr(III) has a very low solubility under the experimental conditions studied (e.g., pH 7). The formation of soluble organo-Cr(III) complexes led to the protection of the cells and chromate reductases from inactivation. In systems with no organic ligands, soluble organo-Cr(III) end products were formed between Cr(III) and the EPS directly released by bacteria due to cell lysis. Our results also provide evidence that cell lysis played an important role in microbial Cr(VI) reduction by Pseudomonas bacteria due to the release of constitutive reductases that intracellularly and/or extracellularly catalyzed the reduction of Cr(VI) to Cr(III). The overall results highlight the need for incorporation of the release and formation of organo-Cr(III) complexes into reactive transport models to more accurately design and monitor in situ microbial remediation techniques for the treatment of subsurface systems contaminated with Cr(VI).

  13. Latitudinal survey of middle atmospheric water vapor revealed by shipboard microwave spectroscopy. Master's thesis

    SciTech Connect (OSTI)

    Schrader, M.L.

    1994-05-01T23:59:59.000Z

    Water vapor is one of the most important greenhouse gases and is an important tracer of atmospheric motions in the middle atmosphere. It also plays an important role in the chemistry of the middle atmosphere and through its photodissociation by solar radiation, it is the major source of hydrogen escaping to space. Ground-based microwave measurements conducted in the 1980s have provided a fair understanding of the seasonal variation of mesospheric water vapor in the northern hemisphere mid-latitudes, but the global distribution of water vapor in the middle atmosphere is only beginning to be revealed by space-based measurements.

  14. Structural alterations in SiC as a result of Cr/sup +/ and N/sup +/ implantation

    SciTech Connect (OSTI)

    Williams, J.M.; McHargue, C.J.; Appleton, B.R.

    1982-01-01T23:59:59.000Z

    Ion scattering and channeling techniques were used to study production of disorder and randomization of SiC by implantation of Cr/sup +/ and N/sup +/ at doses of up to 3 x 10/sup 16/ /cm/sup 2/ for Cr/sup +/ and 8 x 10/sup 16/ /cm/sup 2/ for N/sup +/. Experiments were designed so that the calculated damage energy profiles would be well matched for the two ion species. The results were compared for the degree of effectiveness of Cr/sup +/ and N/sup +/ in producing disorder. At higher doses, Cr/sup +/ was much more effective than N/sup +/ for a given damage energy using the same calculational method for Cr/sup +/ as for N/sup +/. In correlated studies of swelling, both species had about the same effectiveness in producing swelling.

  15. Study of hydrogen and carbon monoxide adsorption on modified Zn/Cr catalysts by adsorption calorimetry

    SciTech Connect (OSTI)

    Yoshin, S.V.; Klyacho, A.L.; Kondrat'ev, L.T.; Leonov, V.E.; Skripchenko, G.B.; Sushchaya, L.E.

    1986-08-01T23:59:59.000Z

    Differential heat of adsorption (q) of hydrogen (a) and carbon monoxide (b) as a function of the adsorbed amount (a) on Zn/Cr catalysts at 463/sup 0/K; 1) unpromoted catalyst, 2) catalyst promoted with 2.5% of K/sub 2/O.

  16. AN OBATA-TYPE THEOREM IN CR GEOMETRY SONG-YING LI AND XIAODONG WANG

    E-Print Network [OSTI]

    Wang, Xiaodong

    AN OBATA-TYPE THEOREM IN CR GEOMETRY SONG-YING LI AND XIAODONG WANG Abstract. We discuss a sharp. 1 #12;2 SONG-YING LI AND XIAODONG WANG the proof of the Bochner formula in [G]. Due to this error

  17. G. J. Snyder Page 1 of 6 THERMOELECTRIC PROPERTIES OF CR3S4-TYPE SELENIDES

    E-Print Network [OSTI]

    devices depends primarily on increasing the figure of merit, ZT, for thermoelectric materials. The figure thermoelectric materials is to search for semiconductors with low lattice thermal conductivity. In this paper we lower than the state-of-the-art thermoelectric material, Bi2Te3 alloys. The structure of Cr3S4 (Figure 1

  18. Limitations for the application of 13Cr steel in oil and gas production environments

    SciTech Connect (OSTI)

    Huizinga, S.; Liek, W.E. [Shell International Oil Products BV, Amsterdam (Netherlands). Shell Research and Technology Centre

    1997-08-01T23:59:59.000Z

    A laboratory investigation of application limits of 13Cr steel was carried out for sweet downhole environments in the CO{sub 2} partial pressure regime up to about 10 bar (1 MPa). Two grades of 13Cr steel were studied, one complying with the API 5CT specification and the other a higher carbon version. Polarization curves, taken at various times after immersion of the specimens in simulated brine, revealed an increasing pitting tendency for the higher chloride levels and indicated better performance for the API 5CT grade. This was in agreement with evidence for chromium depleted zones in the higher carbon grade, obtained from polarization curves in sulfuric acid. Weight loss exposure tests, in which the corrosion rate was also monitored by polarization resistance measurements, were performed at temperatures of 100 and 125 C and supplemented with literature data to extend the temperature range. A mathematical formula was derived to describe the corrosion rate as a function of temperature and chloride content. For instance, if 0.1 mm/y is taken as an acceptable corrosion rate, 13Cr steel could be applied up to 125 C in the presence of 150 g/L Cl{sup {minus}}. In the exposure tests, the API 5CT 13Cr steel did not show pitting at the 0.1 mm/y boundary but the higher carbon grade did suffer from this form of attack.

  19. Comparison of SEM and Optical Analysis of DT Neutron Tracks in CR-39 Detectors

    SciTech Connect (OSTI)

    P.A. Mosier-Boss, L.P.G. Forsley, P. Carbonnelle, M.S. Morey, J.R. Tinsley, J. P. Hurley, F.E. Gordon

    2012-01-01T23:59:59.000Z

    A solid state nuclear track detector, CR-39, was exposed to DT neutrons. After etching, the resultant tracks were analyzed using both an optical microscope and a scanning electron microscope (SEM). In this communication, both methods of analyzing DT neutron tracks are discussed.

  20. Transmission electron microscopy of oxide development on 9Cr ODS steel in supercritical water

    E-Print Network [OSTI]

    Motta, Arthur T.

    Transmission electron microscopy of oxide development on 9Cr ODS steel in supercritical water A strengthened ferritic steel alloys during exposure to 600 °C supercritical water for 2- and 4-weeks were cladding include austenitic stainless steels, solid solution and precipitation-hardened alloys, ferritic

  1. Thermodynamic modelling of Cr-bearing garnets with implications for diamond inclusions and peridotite xenoliths

    E-Print Network [OSTI]

    , Zürich, Switzerland e Geological Survey of Western Australia, Mineral House, 100 Plain Street, East Perth, WA 6004, Australia a b s t r a c ta r t i c l e i n f o Article history: Received 8 September 2008 using free energy minimization techniques. Here we present calculated phase relations in Cr-rich mantle

  2. Magnetic anisotropy in Fe-25Cr-12Co-1Si alloy induced by external magnetic field

    E-Print Network [OSTI]

    Qin, Lu-Chang

    Magnetic anisotropy in Fe-25Cr-12Co-1Si alloy induced by external magnetic field ZHEN Liang( )1 of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China; 2. Department 27599-3255, USA Received 29 June 2006; accepted 15 January 2007 Abstract: Structural and magnetic

  3. Oxidation resistance of 9-12% Cr steels: effect of rare earth surface treatment

    SciTech Connect (OSTI)

    Dogan, Omer N.; Alman, David A.; Jablonski, Paul D.

    2005-02-01T23:59:59.000Z

    Medium Cr steels have been used in fossil fired power plants for many years because of their excellent high temperature stability and mechanical properties. The environment in a fossil fired power plant is extremely aggressive in terms of corrosion, especially oxidation. This is only accelerated as the operating temperature increases to 650C and beyond. For any new steel to be qualified for power plant use, in addition to adequate strength at the operating temperature, material wastage from all corrosion processes must be kept to a minimum acceptable level. The use of medium Cr steels provides a means to improve overall corrosion resistance. Three medium Cr are under development for use as high temperature power plant steels: 0.08C-(9-12)Cr-1.2Ni-0.7Mo-3.0Cu-3.0Co-0.5Ti. Oxidation tests were performed on the steels for times greater than 1000 hours in order to determine the oxidation kinetics and extent of material wastage. Also, rare earth oxides were incorporated into the outer surface layers of the steels to see if the oxidation resistance could be improved. These results will be compared to current power plant steels.

  4. Diode-Pumped Gigahertz Repetition Rate Femtosecond Cr:Lisaf Laser

    E-Print Network [OSTI]

    Li, Duo

    We report a low-cost, 1 GHz repetition-rate, diode-pumped, saturable Bragg reflectors mode-locked Cr:LiSAF laser, which generates nearly transform-limited 103-fs long pulses around 866 nm, with a record high peak power of 1.45 kW.

  5. Long-term measurements of equilibrium factor with electrochemically etched CR-39 SSNTD

    E-Print Network [OSTI]

    Yu, K.N.

    .60 Keywords: Radon progeny concentration; Equilibrium factor; CR-39 1. Introduction Inhaled radon (222 Rn cancer [3]. Methods for long-term monitoring of the concentrations of radon progeny, or the equilibrium factor (which surro- gates the ratios of concentrations of radon progeny to the concentration of the 222

  6. Project EARTH-11-DP1: Exploring early solar system processes using Cr isotopes

    E-Print Network [OSTI]

    Henderson, Gideon

    Project EARTH-11-DP1: Exploring early solar system processes using Cr isotopes Supervisors: Dr D Porcelli & Dr K Amor Various isotope methods have been recently developed to explore the conditions in the early solar system and the processes that have led to the formation of the terrestrial planets. Stable

  7. Clostridium chromiireducens sp. nov., isolated from Cr(VI)-contaminated soil

    E-Print Network [OSTI]

    Florida, University of

    by its ability to reduce Cr(VI) in low concentrations. Mixed acid fermentation during growth on glucose resulted in accumulation of acetate, butyrate, formate and lactate. Morphological studies indicated the presence of peritrichous flagella, pili and an S-layer. The major cellular fatty acids (.5 %) were C16 : 0

  8. Relation between thermal expansion and interstitial formation energy in pure Fe and Cr

    E-Print Network [OSTI]

    Relation between thermal expansion and interstitial formation energy in pure Fe and Cr Janne potentials give lower interstitial formation energy, but predict too small thermal expansion. We also show University, Uppsala, Sweden Abstract By fitting a potential of modified Finnis­Sinclair type to the thermal

  9. Investigations of HRC®-Stimulated Bioreduction of Cr(VI) at Hanford 100H

    SciTech Connect (OSTI)

    T.C. Hazen; B. Faybishenko; D. Joyner; S. Borglin; E.Brodie; S. Hubbard; K. Williams; J. Peterson; J. Wan; T. Tokunaga; Long, P.E.; Newcomer, D.; Koenigsberg, S.; Willet, A.

    2005-04-18T23:59:59.000Z

    Hypothesis: Lactate (Hydrogen Release Compound-HRC{trademark}) injection into chromium contaminated groundwater through an injection well will cause indirect or direct bioreduction of chromate [Cr(VI)] and precipitation of insoluble species of [Cr(III)] on soil particles, probably catalyzed at oxide surfaces, at the field scale. Objective: Assess the potential for immobilizing and detoxifying chromium-contaminated groundwater using lactate-stimulated bioreduction of Cr(VI) to Cr(III) at the Hanford Site's 100-H Area field site. Types of Research: A three-well system (injection well and upgradient and downgradient monitoring wells) was used for conducting the in situ biostimulation and monitoring. To assess the pre- and post-injection test groundwater conditions, we used an integrated monitoring approach, involving hydraulic, geochemical, microbial, and geophysical techniques and analytical methods, as well as conducted five Br-tracer injection tests and four pumping tests (concurrently with the Br-tracer tests). Groundwater biostimulation was conducted by injection of 40 lbs of {sup 13}C-labeled HRC into the injection well (over the depth interval from 44-50 ft) on 8/3/2004, followed by low-flow pumping (1.2 to 2.5 l/min) through the downgradient well (to ensure capture of groundwater flow lines passing through the injection well) for 27 days. Main Results: Although the total microbial population in sediments is relatively low (<10{sup 5} cells g-1) under background conditions, which is likely insufficient for direct enzymatic Cr(VI) reduction, several types of bacteria, e.g., Bacillus/Arthrobacter and Geobacter, are present in the Hanford sediments, which are known to reduce or sorb hexavalent chromium. The HRC injection stimulated microbial cell counts to reach the maximum of 2 x 10{sup 7} cells g{sup -1} 13-17 days after the injection, and generated highly reducing conditions. Geochemical and isotopic observations confirmed microbial metabolism of HRC. The Cr(VI) concentration in the monitoring and pumping wells decreased below drinking water minimum contaminant limits and remained below background concentrations even after 1.5 years, when redox conditions and microbial densities had returned to background levels. Fe(II) levels have remained high and may account for the continued reduction of Cr(VI).

  10. Investigations of HRC®-Stimulated Bioreduction of Cr(VI) at Hanford 100H

    SciTech Connect (OSTI)

    Hazen, T.C.; Faybishenko, B.; Joyner, D.; Borglin, S.; Brodie, E.; Hubbard, S.; Williams, K.; Peterson, J.; Wan, J.; Tokunaga, T.; Firestone, M.; Long, P.E.; Resch, C.T.; Cantrell, K.; Newcomer, D.; Koenigsberg, S.; Willet, A.

    2006-04-05T23:59:59.000Z

    Hypothesis: Lactate (Hydrogen Release Compound-HRC{trademark}) injection into chromium contaminated groundwater through an injection well will cause indirect or direct bioreduction of chromate [Cr(VI)] and precipitation of insoluble species of [Cr(III)] on soil particles, probably catalyzed at oxide surfaces, at the field scale. Objective: Assess the potential for immobilizing and detoxifying chromium-contaminated groundwater using lactate-stimulated bioreduction of Cr(VI) to Cr(III) at the Hanford Site's 100-H Area field site. Types of Research: A three-well system (injection well and upgradient and downgradient monitoring wells) was used for conducting the in situ biostimulation and monitoring. To assess the pre- and post-injection test groundwater conditions, we used an integrated monitoring approach, involving hydraulic, geochemical, microbial, and geophysical techniques and analytical methods, as well as conducted five Br-tracer injection tests and four pumping tests (concurrently with the Br-tracer tests). Groundwater biostimulation was conducted by injection of 40 lbs of {sup 13}C-labeled HRC into the injection well (over the depth interval from 44-50 ft) on 8/3/2004, followed by low-flow pumping (1.2 to 2.5 l/min) through the downgradient well (to ensure capture of groundwater flow lines passing through the injection well) for 27 days. Main Results: Although the total microbial population in sediments is relatively low (<10{sup 5} cells g{sup -1}) under background conditions, which is likely insufficient for direct enzymatic Cr(VI) reduction, several types of bacteria, e.g., Bacillus/Arthrobacter and Geobacter, are present in the Hanford sediments, which are known to reduce or sorb hexavalent chromium. The HRC injection stimulated microbial cell counts to reach the maximum of 2 x 10{sup 7} cells g{sup -1} 13-17 days after the injection, and generated highly reducing conditions. Geochemical and isotopic observations confirmed microbial metabolism of HRC. The CR(VI) concentration in the monitoring and pumping wells decreased below drinking water minimum contaminant limits and remained below background concentrations even after 1.5 years, when redox conditions and microbial densities had returned to background levels. Fe(II) levels have remained high and may account for the continued reduction of Cr(VI).

  11. Design of 3D eye-safe middle range vibrometer

    SciTech Connect (OSTI)

    Polulyakh, Valeriy [Advanced Data Security, 1933 O'Toole Way, San Jose, CA 95131 (United States); Poutivski, Iouri [Terimber Corporation, 2456 Homewood Drive, San Jose, CA 95128, USA and Facebook Inc, 1601 Willow Road, Menlo Park, CA 94025 (United States)

    2014-05-27T23:59:59.000Z

    Laser Doppler Vibrometer and Range Meter (3D-MRV) is designed for middle range distances [1–100 meters]. 3D-MRV combines more than one laser in one device for a simultaneous real time measuring the distance and movement of the targets. The first laser has a short pulse (t?30psec) and low energy (E?200nJ) for distance measurement and the second one is a CW (continuous wave) single frequency laser for the velocity measurement with output power (P?30mW). Both lasers perform on the eye-safe wavelength 1.5 ?m. 3D-MRV uses the same mono-static optical transmitting and receiving channel for both lasers including an output telescope and a scanning angular system. 3D-MRV has an optical polarization switch to combine linear polarized laser beams from two lasers into one optical channel. The laser beams from both lasers by turns illuminate the target and the scattered laser radiation is collected by the telescope on a photo detector. The electrical signal from photo detector is used for measuring the distance to the target and its movement. For distance measurement the time of flight method is employed. For targets movement the optical heterodyne method is employed. The received CW laser radiation is mixed on a photo detector with the frequency-shifted laser radiation that is taken from CW laser and passed through an acousto-optic cell. The electrical signal from a photo detector on the difference frequency and phase has information about movement of the scattered targets. 3D-MVR may be used for the real time picturing of vibration of the extensive targets like bridges or aircrafts.

  12. Development of Personality in Early and Middle Adulthood: Set Like Plaster or Persistent Change?

    E-Print Network [OSTI]

    Pillow, Jonathan

    Development of Personality in Early and Middle Adulthood: Set Like Plaster or Persistent Change-factor theory proposes the plaster hypothesis: All personality traits stop changing by age 30. In contrast

  13. Anatomy Of A Middle Miocene Valles-Type Caldera Cluster- Geology...

    Open Energy Info (EERE)

    Anatomy Of A Middle Miocene Valles-Type Caldera Cluster- Geology Of The Okueyama Volcano-Plutonic Complex, Southwest Japan Jump to: navigation, search OpenEI Reference LibraryAdd...

  14. National Energy Efficiency and Conservation Policies and Programs in Developed Countries and Middle East

    E-Print Network [OSTI]

    Tyrer, C. F.

    2010-01-01T23:59:59.000Z

    for determining the best practices to develop sustainable societies in Middle East region, which in turn will equip these countries to respond more efficiently to the implementation of the latest international standards, which are mandatory in order to succeed...

  15. LOS ALAMOS, New Mexico, April 26, 2011-Los Alamos Middle School...

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

    Alamos schools April 26, 2011 LOS ALAMOS, New Mexico, April 26, 2011-Los Alamos Middle School student Cole Kendrick won the top prize in the 21st New Mexico Supercomputing...

  16. Volunteers Needed to Help With High- and Middle-School Science...

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

    Volunteers Needed to Help With High- and Middle-School Science Bowls on Feb. 7 & March 7 at Lab 2015 Science Bowl 2015 Science Bowl The 2015 National Science Bowl season is right...

  17. Waterfront developments in the Middle East case study : the Golden Horn Project, Istanbul, Turkey

    E-Print Network [OSTI]

    Alamuddin, Hana S. (Hana Slieman)

    1987-01-01T23:59:59.000Z

    This thesis examines waterfront developments in the Middle East . It concentrates on the Golden Horn project in Istanbul as it raises a number of issues that are central to any such development in that region. In order for ...

  18. Integrated Visual Arts and Language Arts: Perceptions of Students and Teachers in a Middle School Classroom

    E-Print Network [OSTI]

    Cornelius, Angela Merced

    2012-10-19T23:59:59.000Z

    The overarching problems to which this study responds are the inadequacies of a traditional language arts curriculum for underserved middle school students and the ways such curricula fall short in providing these students viable means to succeed...

  19. Arts & Sciences Dean's List, Fall 2010 Last Name First Name Middle Name Department Major

    E-Print Network [OSTI]

    Karsai, Istvan

    Arts & Sciences Dean's List, Fall 2010 Last Name First Name Middle Name Department Major Abbott Brian PSCI PSCI Colvett Margaret Grace ENGL LILA Commero Vincent Anthony PHYS PHYS Conduff Corey Patrick

  20. Name (last, first, middle initial) Date of birth City, State, ZIP/Postal code

    E-Print Network [OSTI]

    Name (last, first, middle initial) Date of birth Address City, State, ZIP/Postal code Province or less. 1. Proponents of cognitive enhancement--the use of "smart pills," deep brain stimulation

  1. Risk analysis in oil and gas projects : a case study in the Middle East

    E-Print Network [OSTI]

    Zand, Emad Dolatshahi

    2009-01-01T23:59:59.000Z

    Global demand for energy is rising around the world. Middle East is a major supplier of oil and gas and remains an important region for any future oil and gas developments. Meanwhile, managing oil and gas projects are ...

  2. Early Channel Evolution in the Middle Permian Brushy Canyon Formation, West Texas, USA

    E-Print Network [OSTI]

    Gunderson, Spencer

    2011-10-21T23:59:59.000Z

    measured at both locations. A total of 16 samples were collected for petrographic analysis and X-ray fluorescence (XRF) imaging. Spectacular outcrop quality makes the Middle Permian Brushy Canyon Formation in Guadalupe Mountains National Park an ideal...

  3. An assessment of middle grades preservice teachers' mathematics knowledge for teaching

    E-Print Network [OSTI]

    Mohr, Margaret Joan

    2009-06-02T23:59:59.000Z

    preservice middle grades mathematics teachers to demonstrate their mathematics knowledge for teaching in the four main content strands of algebra, probability and statistics, geometry, and number and operations. In addition, this study examined differences...

  4. New age constraints on the Middle Stone Age occupations of Kharga Oasis, Western Desert, Egypt

    E-Print Network [OSTI]

    Asmerom, Yemane

    New age constraints on the Middle Stone Age occupations of Kharga Oasis, Western Desert, Egypt rocks, or tufas, exposed along the flanks of the Libyan Plateau near Kharga Oasis, Western Desert, Egypt

  5. E-Print Network 3.0 - arab middle east Sample Search Results

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

    of Connecticut Collection: Environmental Sciences and Ecology 26 Women in Physics in Egypt and the Arab World Karimat ElSayed Summary: in Africa and Middle East, which was held...

  6. The forgotten class : reconceptualizing contemporary middle-income housing in New York City

    E-Print Network [OSTI]

    Milchman, Karina (Karina Faye)

    2013-01-01T23:59:59.000Z

    New York City's costly real estate poses housing affordability challenges for not only low- or even moderate-income households, but also for the so-called "middle class." Because New York is predominantly a renter's market, ...

  7. RELATIONSHIP BETWEEN TEACHER JOB SATISFACTION AND TEAMING STRUCTURE AT THE MIDDLE SCHOOL LEVEL

    E-Print Network [OSTI]

    Oliver, Randy Eugene

    2008-02-01T23:59:59.000Z

    This study compared the perceptions of middle school teachers regarding the characteristics of teams in theirs school and their job satisfaction levels. The study used two instruments to collect data. The Team Excellence ...

  8. Towards improved partnerships in the water sector in the Middle East : A case study of Jordan

    E-Print Network [OSTI]

    Odeh, Nancy

    2009-01-01T23:59:59.000Z

    This dissertation focuses on the use of public-private partnerships (PPPs) in the water sector in Jordan, a Middle East pioneer with respect to experimenting with different approaches to delivering water services in both ...

  9. Key worker housing : a demand analysis of middle-income workforce housing in eastern Massachusetts

    E-Print Network [OSTI]

    Sacks, Sean D

    2005-01-01T23:59:59.000Z

    The Boston Metropolitan Area is one of the most expensive places to live in the United States. In recent years studies have speculated that middle-income workers have had to endure increased commute times as they have moved ...

  10. Originally presented at Photomask Japan '94, Kanagawa Science Park, April, 1994 Attenuated phase-shifting photomasks fabricated from Cr-based embedded shifter blanks

    E-Print Network [OSTI]

    Rollins, Andrew M.

    the cathode powers and gas mixture. Cr-based films' flexible properties are suitable for several applications

  11. Geology of the Middle Beaver Creek area, Mason and Gillespie Counties, Texas

    E-Print Network [OSTI]

    Peterson, Don Hamilton

    1959-01-01T23:59:59.000Z

    AREA, NASGR AEG GILhNPIR COGRTIES, TEIAB ABSTRACT The Middle Beaver Creek area is situated on the soutlwsst flank of the Llano ?plift region in Mason and Gillespie Counties, Texas Hooks of Presa?brian, Psleosoie, Mesosois, and Genosois age... ' Figure 1. ? Map of' part of Mason and Gillespie Counties, Texass showing location of' the Middle Beaver Creek Area, on aoetats oosered aerial photographs. In order to aoourateIp locate and plot the oontaots asd faults, the photographs vere studies...

  12. Giraffidae from the middle Miocene hominoid locality of andir (Turkey). 1 figure, 2 plates

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Giraffidae from the middle Miocene hominoid locality of �andir (Turkey). 1 figure, 2 plates Denis@ivry.cnrs.fr ** MTA Genel Müdürlügü, Jeoloji Etüdleri Dairesi, 06520 ANKARA, TURKEY Abstract.- The site of �andir has this area and the Siwaliks raises some interesting phylogenetic problems. Key-words.- Middle Miocene, Turkey

  13. Structural Properties of the Cr(III)-Fe(III) (Oxy)Hydroxide Compositional Series: Insights for a Nanomaterial “Solid Solution”

    SciTech Connect (OSTI)

    Tang, Y.; Zhang, L.; Michel, F.M.; Harrington, R.; Parise, J.B.; Reeder, R.J.

    2010-05-28T23:59:59.000Z

    Chromium(III) (oxy)hydroxide and mixed Cr(III)-Fe(III) (oxy)hydroxides are environmentally important compounds for controlling chromium speciation and bioaccessibility in soils and aquatic systems and are also industrially important as precursors for materials and catalyst synthesis. However, direct characterization of the atomic arrangements of these materials is complicated because of their amorphous X-ray properties. This study involves synthesis of the complete Cr(III)-Fe(III) (oxy)hydroxide compositional series, and the use of complementary thermal, microscopic, spectroscopic, and scattering techniques for the evaluation of their structural properties. Thermal analysis results show that the Cr end member has a higher hydration state than the Fe end member, likely associated with the difference in water exchange rates in the first hydration spheres of Cr(III) and Fe(III). Three stages of weight loss are observed and are likely related to the loss of surface/structural water and hydroxyl groups. As compared to the Cr end member, the intermediate composition sample shows lower dehydration temperatures and a higher exothermic transition temperature. XANES analysis shows Cr(III) and Fe(III) to be the dominant oxidation states. XANES spectra also show progressive changes in the local structure around Cr and Fe atoms over the series. Pair distribution function (PDF) analysis of synchrotron X-ray total scattering data shows that the Fe end member is nanocrystalline ferrihydrite with an intermediate-range order and average coherent domain size of {approx}27 {angstrom}. The Cr end member, with a coherent domain size of {approx}10 {angstrom}, has only short-range order. The PDFs show progressive structural changes across the compositional series. High-resolution transmission electron microscopy (HRTEM) results also show the loss of structural order with increasing Cr content. These observations provide strong structural evidence of chemical substitution and progressive structural changes along the compositional series.

  14. Structural Properties of the Cr(III)-Fe(III) (Oxy)hydroxide Compositional Series: Insights for a Nanomaterial "Solid Solution"

    SciTech Connect (OSTI)

    Michel, Y.; Michel, F; Zhang, L; Harrington, R; Parise, J; Reeder, R

    2010-01-01T23:59:59.000Z

    Chromium(III) (oxy)hydroxide and mixed Cr(III)-Fe(III) (oxy)hydroxides are environmentally important compounds for controlling chromium speciation and bioaccessibility in soils and aquatic systems and are also industrially important as precursors for materials and catalyst synthesis. However, direct characterization of the atomic arrangements of these materials is complicated because of their amorphous X-ray properties. This study involves synthesis of the complete Cr(III)-Fe(III) (oxy)hydroxide compositional series, and the use of complementary thermal, microscopic, spectroscopic, and scattering techniques for the evaluation of their structural properties. Thermal analysis results show that the Cr end member has a higher hydration state than the Fe end member, likely associated with the difference in water exchange rates in the first hydration spheres of Cr(III) and Fe(III). Three stages of weight loss are observed and are likely related to the loss of surface/structural water and hydroxyl groups. As compared to the Cr end member, the intermediate composition sample shows lower dehydration temperatures and a higher exothermic transition temperature. XANES analysis shows Cr(III) and Fe(III) to be the dominant oxidation states. XANES spectra also show progressive changes in the local structure around Cr and Fe atoms over the series. Pair distribution function (PDF) analysis of synchrotron X-ray total scattering data shows that the Fe end member is nanocrystalline ferrihydrite with an intermediate-range order and average coherent domain size of 27 {angstrom}. The Cr end member, with a coherent domain size of 10 {angstrom}, has only short-range order. The PDFs show progressive structural changes across the compositional series. High-resolution transmission electron microscopy (HRTEM) results also show the loss of structural order with increasing Cr content. These observations provide strong structural evidence of chemical substitution and progressive structural changes along the compositional series.

  15. Doubly resonant Raman electron paramagnetic transitions of Cr{sup 3+} in ruby (Al{sub 2}O{sub 3}:Cr{sup 3+}).

    SciTech Connect (OSTI)

    Lu, X.; Venugopalan, S.; Kim, H.; Grimsditch, M.; Rodriguez, S.; Ramdas, A. K.; Materials Science Division; Purdue Univ.; State Univ. of New York at Binghamton; Sogang Univ.

    2009-06-01T23:59:59.000Z

    We report the Raman electron paramagnetic resonance (EPR) of Cr{sup 3+} in ruby (Al{sub 2}O{sub 3}:Cr{sup 3+}) in the {sup 4}A{sub 2} (ground) and E{sup -} (excited) states of its well-known R{sub 1} emission line. Using tunable dye laser excitation within the range of the Zeeman components of R{sub 1}, we observe highly selective doubly resonant enhancements of the Raman EPR lines. The double resonances confirm the assignments of the Raman EPR lines, and they underscore the simultaneous occurrence of both 'in resonance' and 'out resonance' as visualized in the Kramers-Heisenberg quantum-mechanical picture of inelastic light scattering. The g factors of the {sup 4}A{sub 2} and E{sup -} states are consistent with the observed magnetic field dependence of the Raman EPR shifts. Through the interplay of Raman effect and the sharp Zeeman components of R{sub 1}, the results provide clear insights into the underlying microscopic mechanism of these resonant Raman EPR spectra of ruby.

  16. Magnetization switching of rare earth orthochromite CeCrO{sub 3}

    SciTech Connect (OSTI)

    Cao, Yiming; Cao, Shixun, E-mail: sxcao@shu.edu.cn; Ren, Wei; Feng, Zhenjie; Yuan, Shujuan; Kang, Baojuan; Zhang, Jincang [Department of Physics, Shanghai University, Shanghai 200444 (China); Lu, Bo [Laboratory for Microstructures, Shanghai University, Shanghai 200444 (China)

    2014-06-09T23:59:59.000Z

    We report the synthesis of single phase rare earth orthochromite CeCrO{sub 3} and its magnetic properties. A canted antiferromagnetic transition with thermal hysteresis at T?=?260?K is observed, and a magnetic compensation (zero magnetization) near 133?K is attributed to the antiparallel coupling between Ce{sup 3+} and Cr{sup 3+} moments. At low temperature, field induced magnetization reversal starting from 43?K for H?=?1.2 kOe reveals the spin flip driven by Zeeman energy between the net moments and the applied field. These findings may find potential uses in magnetic switching devices such as nonvolatile magnetic memory which facilitates two distinct states of magnetization.

  17. Irradiation effects on base metal and welds of 9Cr-1Mo (EM10) martensitic steel

    SciTech Connect (OSTI)

    Alamo, A.; Seran, J.L.; Rabouille, O.; Brachet, J.C.; Maillard, A.; Touron, H.; Royer, J. [CEA Saclay, Gif-sur-Yvette (France)

    1996-12-31T23:59:59.000Z

    9Cr martensitic steels are being developed for core components (wrapper tubes) of fast breeder reactors as well as for fusion reactor structures. Here, the effects of fast neutron irradiation on the mechanical behavior of base metal and welds of 9Cr-1Mo (EM10) martensitic steel have been studied. Two types of weldments have been produced by TIG and electron beam techniques. Half of samples have been post-weld heat treated to produce a stress-relieved structure. The irradiation has been conducted in the Phenix reactor to doses of 63--65 dpa in the temperature range 450--459 C. The characterization of the welds, before and after irradiation, includes metallographic observations, hardness measurements, tensile and Charpy tests. It is shown that the mechanical properties of the welds after irradiation are in general similar to the characteristics obtained on the base metal, which is little affected by neutron irradiation.

  18. High-reflectivity Cr/Sc multilayer condenser for compact soft x-ray microscopy

    SciTech Connect (OSTI)

    Stollberg, H.; Yulin, S.; Takman, P. A. C.; Hertz, H. M. [Biomedical and X-Ray Physics, Department of Applied Physics, KTH-AlbaNova, 10691 Stockholm (Sweden); Fraunhofer-Institut fur Angewandte Optik und Feinmechanik, Albert-Einstein-Strasse 7, 07745 Jena (Germany); Biomedical and X-Ray Physics, Department of Applied Physics, KTH-AlbaNova, 10691 Stockholm (Sweden)

    2006-12-15T23:59:59.000Z

    The condenser is a critical component in compact water-window x-ray microscopes as it influences the exposure time via its efficiency and the resolution via its numerical aperture. Normal-incidence multilayer mirrors can reach large geometrical collection efficiencies and match the numerical aperture of the zone plate but require advanced processing for high total reflectivity. In the present article we demonstrate large-diameter normal-incidence spherical Cr/Sc multilayer condensers with high and uniform reflectivity. Dc-magnetron sputtering was used to deposit 300 bilayers of Cr/Sc with a predetermined d-spacing matching the {lambda}=3.374 nm operating wavelength on spherical substrates. The mirrors show a uniform reflectivity of {approx}3% over the full 58 mm diameter condenser area. With these mirrors an improvement in exposure time by a factor of 10 was achieved, thereby improving the performance of the compact x-ray microscope significantly.

  19. Development and characterization of PdCr temperature-compensaated wire resistance strain gage

    SciTech Connect (OSTI)

    Lei, J.F.

    1989-10-01T23:59:59.000Z

    A temperature-compensated resistance static strain gage with potential to be used to 600 C was recently developed. Gages were fabricated from specially developed palladium-13 w/o chromium (Pd-13Cr) wire and platinum (Pt) compensator. When bonded to high temperature Hastelloy X, the apparent strain from room temperature to 600 C was within 400 microstrain for gages with no preheat treatment and within 3500 microstrain for gages with 16 hours prestabilization at 640 C. The apparent strain versus temperature relationship of stabilized PdCr gages were repeatable with the reproducibility within 100 microstrain during three thermal cycles to 600 C and an 11 hours soak at 600 C. The gage fabrication, construction and installation is described. Also, the coating system used for this compensated resistance strain gage is explained. The electrical properties of the strain sensing element and main characteristics of the compensated gage including apparent strain, drift and reproducibility are discussed.

  20. Absence of long-range chemical ordering in equimolar FeCoCrNi

    SciTech Connect (OSTI)

    Lucas, M. S. [Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433 (United States); UTC Inc., 1270 North Fairfield Road, Dayton, Ohio 45432 (United States); Wilks, G. B.; Senkov, O. N. [Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433 (United States); UES, Inc., 4401 Dayton-Xenia Rd., Dayton, Ohio 45432 (United States); Mauger, L.; Munoz, J. A. [California Institute of Technology, W. M. Keck Laboratory 138-78, Pasadena, California 91125 (United States); Michel, E. [Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433 (United States); Wright State University, Dayton, Ohio 45435 (United States); Horwath, J.; Semiatin, S. L. [Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433 (United States); Stone, M. B.; Abernathy, D. L. [Oak Ridge National Laboratory, 1, Bethel Valley Road, Oak Ridge, Tennessee 37831 (United States); Karapetrova, E. [Argonne National Laboratory, Argonne, Illinois 60439 (United States)

    2012-06-18T23:59:59.000Z

    Equimolar FeCoCrNi alloys have been the topic of recent research as 'high-entropy alloys,' where the name is derived from the high configurational entropy of mixing for a random solid solution. Despite their name, no systematic study of ordering in this alloy system has been performed to date. Here, we present results from anomalous x-ray scattering and neutron scattering on quenched and annealed samples. An alloy of FeNi{sub 3} was prepared in the same manner to act as a control. Evidence of long-range chemical ordering is clearly observed in the annealed FeNi{sub 3} sample from both experimental techniques. The FeCoCrNi sample given the same heat treatment lacks long-range chemical order.

  1. Absence of long-range chemical ordering in equimolar FeCoCrNi

    SciTech Connect (OSTI)

    Lucas, Matthew [Air Force Research Laboratory, Wright-Patterson AFB, OH; Wilks, G B [Air Force Research Laboratory, Wright-Patterson AFB, OH; Mauger, L [W. M. Keck Laboratory, Pasadena, CA; Munoz, Jorge A. [California Institute of Technology, Pasadena; Senkov, Oleg [ORNL; Michel, E [Air Force Research Laboratory, Wright-Patterson AFB, OH; Horwath, J [Air Force Research Laboratory, Wright-Patterson AFB, OH; Semiatin, S L [Air Force Research Laboratory, Wright-Patterson AFB, OH; Stone, Matthew B [ORNL; Abernathy, Douglas L [ORNL; Karapetrova, Evgenia [University of Illinois, Urbana-Champaign

    2012-01-01T23:59:59.000Z

    Equimolar FeCoCrNi alloys have been the topic of recent research as high-entropy alloys, where the name is derived from the high configurational entropy of mixing for a random solid solution. Despite their name, no systematic study of ordering in this alloy system has been performed to date. Here we present results from anomalous x-ray scattering and neutron scattering on quenched and annealed samples. An alloy of FeNi3 was prepared in the same manner to act as a control. Evidence of longrange chemical ordering is clearly observed in the annealed FeNi3 sample from both experimental techniques. The FeCoCrNi sample given the same heat treatment lacks long-range chemical order.

  2. MICROSTRUCTURAL EXAMINATION OF V-4CR-4TI PRESSURIZED THERMAL CREEP TUBES

    SciTech Connect (OSTI)

    Gelles, David S.

    2002-09-01T23:59:59.000Z

    Two further failed thermal creep pressurized tubes of V-4Cr-4Ti tested at 700 and 800 degrees C have been examined using optical microscopy and transmission electron microscopy in order to understand failure and creep mechanisms. These conditions represent lower stress states than were previously examined. Creep deformation at lower stress is shown to be controlled by sub-boundary formation and mis-orientation between sub-grains arising from climb of dislocations within the boundary.

  3. High pressure synthesis of a new chromite, ScCrO{sub 3}

    SciTech Connect (OSTI)

    Park, J.H.; Parise, J.B. [State Univ. of New York, Stony Brook, NY (United States)] [State Univ. of New York, Stony Brook, NY (United States)

    1997-12-01T23:59:59.000Z

    A new compound, ScCrO{sub 3} has been synthesized at 45 kbar and 1,200 C using the cylindrical type press (USCA-1000). It has Pbnm symmetry with a = 5.0329(2) {angstrom}, b = 5.3602(3) {angstrom}, and c = 7.3790(4) {angstrom}, and its structure has been refined using the Rietveld technique and the synchrotron powder X-ray diffraction data.

  4. The energy distribution of beta CrB for the specific stellar abundances

    E-Print Network [OSTI]

    F. Castelli

    1998-05-06T23:59:59.000Z

    The comparison of the observed and computed energy distributions of beta CrB has shown that a model with the specific chemical composition of the star can account for the visual enery distribution, while it is still unable to reproduce ultraviolet observations shortward of 1700 A. Furthermore, the predicted absorption of strong Fe II and Mg II UV lines is much larger than the observed one.

  5. The MSFR as a flexible CR reactor: the viewpoint of safety

    SciTech Connect (OSTI)

    Fiorina, C.; Cammi, A. [Politecnico di Milano, Via La Masa 34, 20136 Milan (Italy); Franceschini, F. [Westinghouse Electric Company LL, 1000 Westinghouse Dr., Cranberry Township, PA 16066 (United States); Krepel, J. [Paul Scherrer Institut, PSI WEST, 5234 Villigen (Switzerland)

    2013-07-01T23:59:59.000Z

    In this paper, the possibility has first been discussed of using the liquid-fuelled Molten Salt Fast Reactor (MSFR) as a flexible conversion ratio (CR) reactor without design modification. By tuning the reprocessing rate it is possible to determine the content of fission products in the core, which in turn can significantly affect the neutron economy without incurring in solubility problems. The MSFR can thus be operated as U-233 breeder (CR>1), iso-breeder (CR=1) and burner reactor (CR<1). In particular a 40 year doubling time can be achieved, as well as a considerable Transuranics and MA (minor actinide) burning rate equal to about 150 kg{sub HN}/GWE-yr. The safety parameters of the MSFR have then been evaluated for different fuel cycle strategies. Th use and a softer spectrum combine to give a strong Doppler coefficient, one order of magnitude higher compared to traditional fast reactors (FRs). The fuel expansion coefficient is comparable to the Doppler coefficient and is only mildly affected by core compositions, thus assisting the fuel cycle flexibility of the MSFR. ?eff and generation time are comparable to the case of traditional FRs, if a static fuel is assumed. A notable reduction of ?eff is caused by salt circulation, but a low value of this parameter is a limited concern in the MSFR thanks to the lack of a burnup reactivity swing and of positive feedbacks. A simple approach has also been developed to evaluate the MSFR capabilities to withstand all typical double-fault accidents, for different fuel cycle options.

  6. Ferromagnetic ordering of Cr and Fe doped p-type diamond: An ab initio study

    SciTech Connect (OSTI)

    Benecha, E. M. [Department of Physics, University of South Africa, P.O Box 392, UNISA 0003, Pretoria (South Africa); Lombardi, E. B. [College of Graduate Studies, University of South Africa, P.O Box 392, UNISA 0003, Pretoria (South Africa)

    2014-02-21T23:59:59.000Z

    Ferromagnetic ordering of transition metal dopants in semiconductors holds the prospect of combining the capabilities of semiconductors and magnetic systems in single hybrid devices for spintronic applications. Various semiconductors have so far been considered for spintronic applications, but low Curie temperatures have hindered room temperature applications. We report ab initio DFT calculations on the stability and magnetic properties of Fe and Cr impurities in diamond, and show that their ground state magnetic ordering and stabilization energies depend strongly on the charge state and type of co-doping. We predict that divacancy Cr{sup +2} and substitutional Fe{sup +1} order ferromagnetically in p-type diamond, with magnetic stabilization energies (and magnetic moment per impurity ion) of 16.9 meV (2.5 ?{sub B}) and 33.3 meV (1.0 ?{sub B}), respectively. These magnetic stabilization energies are much larger than what has been achieved in other semiconductors at comparable impurity concentrations, including the archetypal dilute magnetic semiconductor GaAs:Mn. In addition, substitutional Fe{sup +1} exhibits a strong half-metallic character, with the Fermi level crossing bands in only the spin down channel. These results, combined with diamond’s extreme properties, demonstrate that Cr or Fe dopedp-type diamond may successfully be considered in the search for room temperature spintronic materials.

  7. Attribute Cr. Course Name Prereq 4 BIOL 220 (204) Principles of Biology: Organisms, Ecology, Evolution Plus Lab and discussion (Fall)

    E-Print Network [OSTI]

    Lewis, Robert Michael

    Attribute Cr. Course Name Prereqs Prereq 4 BIOL 220 (204) Principles of Biology: Organisms, Ecology Foundations of Learning and Memory (Fall, Spr) Beh. Elec. 3 PSYC 317 Sensation and Perception (Fall) Beh

  8. Raman Spectroscopic and Visible Absorption Investigation of LiCrSi2O6 Pyroxene Under Pressure

    E-Print Network [OSTI]

    Downs, Robert T.

    symmetry.6,7 Spodumene (LiAlSi2O6) and LiCrSi2O6 behave similarly at the phase transition; both go from 6

  9. Auger Nanoprobe analysis of presolar ferromagnesian silicate grains from primitive CR chondrites QUE 99177 and MET 00426

    E-Print Network [OSTI]

    Auger Nanoprobe analysis of presolar ferromagnesian silicate grains from primitive CR chondrites inventories are dominated by ferromagnesian silicates with group 1 oxygen isotopic compositions, indicative interstellar silicates have stoichiometries between olivine and pyroxene type silicates. Although structural

  10. Microbial community changes during sustained Cr(VI) reduction at the 100H site in Hanford, WA

    E-Print Network [OSTI]

    Chakraborty, Romy

    2010-01-01T23:59:59.000Z

    at the 100H site in Hanford, WA Romy Chakraborty 1 , Eoin Lcontaminated aquifer at the Hanford (WA) 100H site in 2004.Cr(VI) reduction at Hanford, and a comparison of the

  11. In situ long-term reductive bioimmobilization of Cr(VI) in groundwater using hydrogen release compound

    E-Print Network [OSTI]

    Faybishenko, B.

    2009-01-01T23:59:59.000Z

    100 H Area of the DOE Hanford Facility, Quantum EngineeringCr-immobilization research site at Hanford 100-H area. Wellexperiment was conducted at the Hanford Site (Washington), a

  12. Treatment of primary tailings and middlings from the hot water extraction process for recovering bitumen from tar sand

    SciTech Connect (OSTI)

    Cymbalisty, L. M. O.; Cymerman, J.

    1995-10-08T23:59:59.000Z

    The primary tailings and middlings are combined and fed to a vessel having the general form of a deep cone thickener. The feed is deflected outwardly and generally horizontally by a baffle, as it is delivered to the vessel. Simultaneously, the outwardly radiating layer of newly added feed is contacted from below by an upwelling stream of aerated middlings, which stream moves in parallel with the aforesaid layer. Bitumen froth is formed and recovered. The upwelling stream is provided by circulating middlings through eductor/aerator assemblies and a plenum chamber mounted centrally in the body of middlings in the vessel. A generally circular circulation of middlings is generated. In this manner, the newly added bitumen is quickly and efficiently recovered. Recirculation of middlings to the aeration zone yields an additional recovery of bitumen. Use of the deep cone ensures that the tailings from the vessel are relatively low in water and bitumen content.

  13. Structure of multilayered Cr(Al)N/SiO{sub x} nanocomposite coatings fabricated by differential pumping co-sputtering

    SciTech Connect (OSTI)

    Kawasaki, Masahiro [JEOL USA Inc., 11 Dearborn Road, Peabody, Massachusetts 01960 (United States)] [JEOL USA Inc., 11 Dearborn Road, Peabody, Massachusetts 01960 (United States); Nose, Masateru [Faculty of Art and Design, University of Toyama, 180 Futagami-machi, Takaoka 933-8588 (Japan)] [Faculty of Art and Design, University of Toyama, 180 Futagami-machi, Takaoka 933-8588 (Japan); Onishi, Ichiro [JEOL Ltd. 3-1-2 Musashino, Akishima, Tokyo 196-8558 (Japan)] [JEOL Ltd. 3-1-2 Musashino, Akishima, Tokyo 196-8558 (Japan); Shiojiri, Makoto [Kyoto Institute of Technology, Kyoto 606-8585 (Japan)] [Kyoto Institute of Technology, Kyoto 606-8585 (Japan)

    2013-11-11T23:59:59.000Z

    A Cr(Al)N/38 vol. % SiO{sub x} hard coating was prepared on a (001) Si substrate at 250 °C in a differential pumping co-sputtering system, which has two chambers for radio frequency (RF) sputtering and a substrate holder rotating on the chambers. The composite coating was grown by alternate sputter-depositions from CrAl and SiO{sub 2} targets with flows of N{sub 2}+Ar and Ar at RF powers of 200 and 75 W, respectively, on transition layers grown on the substrate. Analytical electron microscopy reveled that the Cr(Al)N/SiO{sub x} coating had a multilayered structure of Cr(Al)N crystal layers ?1.6 nm thick and two-dimensionally dispersed amorphous silicon oxide (a-SiO{sub x}) particles with sizes of ?1 nm or less. The a-SiO{sub x} particles were enclosed with the Cr(Al)N layers. The coating had a low indentation hardness of ?25 GPa at room temperature, due to a high oxide fraction of 38 vol. % and a low substrate rotational speed of 1 rpm. Faster rotation and lower oxide fraction would make a-SiO{sub x} particles smaller, resulting in the formation of Cr(Al)N crystal including the very fine a-SiO{sub x} particles with small number density. They would work as obstacles for the lattice deformation of the Cr(Al)N crystals. We have fabricated a superhard coating of Cr(Al)N/17 vol. % SiO{sub x} with a hardness of 46 GPa prepared at 12 rpm.

  14. Cr-W-V bainitic/ferritic steel with improved strength and toughness and method of making

    DOE Patents [OSTI]

    Klueh, Ronald L. (Knoxville, TN); Maziasz, Philip J. (Oak Ridge, TN)

    1994-01-01T23:59:59.000Z

    A high strength, high toughness Cr-W-V ferritic steel composition suitable for fast induced-radioactivity (FIRD) decay after irradiation in a fusion reactor comprises 2.5-3.5 wt % Cr, 2. This invention was made with Government support under contract DE-AC05-840R21400 awarded by the U.S. Department of Energy to Martin Marietta Energy Systems, Inc. and the Government has certain rights in this invention.

  15. A Case Study of Five Urban Middle School Teachers Involved In A Culturally Responsive Teaching Teacher Study Group

    E-Print Network [OSTI]

    Kerr, Alicia Ann

    2011-08-08T23:59:59.000Z

    middle school teachers participating in a TSG on CRT and examined how these urban middle school teachers described their learning experiences of the CRT content. A purposeful sample of five teachers was used. Data collection was done with open... development design and the participants? learning experiences about the CRT content with the voices of the teacher participants. Research Questions 1. What are the professional development experiences of urban middle school teachers who participate in a...

  16. Oil, politics, society and the state in the middle east: Enduring authoritarianism in Iran and Saudi Arabia.

    E-Print Network [OSTI]

    Martorell, Benjamin E

    2012-01-01T23:59:59.000Z

    ?? This thesis examines the relationship between oil and the persistence of authoritarianism in the Middle East. Specifically, it analyzes and critiques the rentier state… (more)

  17. Transmission electron microscopy of RSP Fe/Cr/Mn/Mo/C alloy. [Fe-3 wt % Cr-2 wt % Mn-0. 5 wt % Mo, -0. 3 wt % C

    SciTech Connect (OSTI)

    Rayment, J.J.; Thomas, G.

    1982-03-01T23:59:59.000Z

    Rapid solidification processing (RSP) has been carried out on an Fe/Cr/Mn/Mo/C alloy using both electron-beam melting and piston-and-anvil techniques. Preliminary TEM results show RSP produces a refined duplex microstructure of ferrite and martensite, with a typical ferrite grain size of 0.50 - 3.0 microns. This RSP microstructure is significantly different from that observed in the conventionally austenitized and quenched alloys - a lath martensitic microstructure with thin films of retained interlath austenite. The morphological change produced by RSP is accompanied by an increase in hardness from 48R/sub c/ to 61R/sub c/ (approx. 480 to 720 VHN). It is intended to use electron-beam specimens to examine the potential beneficial effect of RSP upon sliding wear resistance and, by careful TEM studies, it will be possible to characterize the microstructure and its role in the hardness and wear behavior of the RSP alloy.

  18. Reactive oxygen species mediate Cr(VI)-induced carcinogenesis through PI3K/AKT-dependent activation of GSK-3?/?-catenin signaling

    SciTech Connect (OSTI)

    Son, Young-Ok; Pratheeshkumar, Poyil; Wang, Lei; Wang, Xin; Fan, Jia; Kim, Dong-Hern; Lee, Ju-Yeon; Zhang, Zhuo [Graduate Center for Toxicology, College of Medicine, University of Kentucky, Lexington, KY 40536-0305 (United States); Lee, Jeong-Chae [Graduate Center for Toxicology, College of Medicine, University of Kentucky, Lexington, KY 40536-0305 (United States); School of Dentistry and Institute of Oral Biosciences, Research Center of Bioactive Materials, Chonbuk National University, Jeonju 561-756 (Korea, Republic of); Shi, Xianglin, E-mail: xshi5@email.uky.edu [Graduate Center for Toxicology, College of Medicine, University of Kentucky, Lexington, KY 40536-0305 (United States)

    2013-09-01T23:59:59.000Z

    Cr(VI) compounds are known human carcinogens that primarily target the lungs. Cr(VI) produces reactive oxygen species (ROS), but the exact effects of ROS on the signaling molecules involved in Cr(VI)-induced carcinogenesis have not been extensively studied. Chronic exposure of human bronchial epithelial cells to Cr(VI) at nanomolar concentrations (10–100 nM) for 3 months not only induced cell transformation, but also increased the potential of these cells to invade and migrate. Injection of Cr(VI)-stimulated cells into nude mice resulted in the formation of tumors. Chronic exposure to Cr(VI) increased levels of intracellular ROS and antiapoptotic proteins. Transfection with catalase or superoxide dismutase (SOD) prevented Cr(VI)-mediated increases in colony formation, cell invasion, migration, and xenograft tumors. While chronic Cr(VI) exposure led to activation of signaling cascades involving PI3K/AKT/GSK-3?/?-catenin and PI3K/AKT/mTOR, transfection with catalase or SOD markedly inhibited Cr(VI)-mediated activation of these signaling proteins. Inhibitors specific for AKT or ?-catenin almost completely suppressed the Cr(VI)-mediated increase in total and active ?-catenin proteins and colony formation. In particular, Cr(VI) suppressed autophagy of epithelial cells under nutrition deprivation. Furthermore, there was a marked induction of AKT, GSK-3?, ?-catenin, mTOR, and carcinogenic markers in tumor tissues formed in mice after injection with Cr(VI)-stimulated cells. Collectively, our findings suggest that ROS is a key mediator of Cr(VI)-induced carcinogenesis through the activation of PI3K/AKT-dependent GSK-3?/?-catenin signaling and the promotion of cell survival mechanisms via the inhibition of apoptosis and autophagy. - Highlights: • Chronic exposure to Cr(VI) induces carcinogenic properties in BEAS-2B cells. • ROS play an important role in Cr(VI)-induced tumorigenicity of BEAS-2B cells. • PI3K/AKT/GSK-3?/?-catenin signaling involved in Cr(VI) carcinogenesis. • The inhibition of apoptosis and autophagy contributes to Cr(VI) carcinogenesis.

  19. Letter Report Documenting Progress of Second Generation ATF FeCrAl Alloy Fabrication

    SciTech Connect (OSTI)

    Yamamoto,, Y. [ORNL] [ORNL; Yang, Y. [ORNL] [ORNL; Field, K. G. [ORNL] [ORNL; Terrani, K. [ORNL] [ORNL; Pint, B. A. [ORNL] [ORNL; Snead, L. L. [ORNL] [ORNL

    2014-06-10T23:59:59.000Z

    Development of the 2nd generation ATF FeCrAl alloy has been initiated, and a candidate alloy was selected for trial tube fabrication through hot-extrusion and gun-drilling processes. Four alloys based on Fe-13Cr-4.5Al-0.15Y in weight percent were newly cast with minor alloying additions of Mo, Si, Nb, and C to promote solid-solution and second-phase precipitate strengthening. The alloy compositions were selected with guidance from computational thermodynamic tools. The lab-scale heats of ~ 600g were arc-melted and drop-cast, homogenized, hot-forged and -rolled, and then annealed producing plate shape samples. An alloy with Mo and Nb additions (C35MN) processed at 800°C exhibits very fine sub-grain structure with the sub-grain size of 1-3?m which exhibited more than 25% better yield and tensile strengths together with decent ductility compared to the other FeCrAl alloys at room temperature. It was found that the Nb addition was key to improving thermal stability of the fine sub-grain structure. Optimally, grains of less than 30 microns are desired, with grains up to and order of magnitude in desired produced through Nb addition. Scale-up effort of the C35MN alloy was made in collaboration with a commercial cast company who has a capability of vacuum induction melting. A 39lb columnar ingot with ~81mm diameter and ~305mm height (with hot-top) was commercially cast, homogenized, hot-extruded, and annealed providing 10mm-diameter bar-shape samples with the fine sub-grain structure. This commercial heat proved consistent with materials produced at ORNL at the lab-scale. Tubes and end caps were machined from the bar sample and provided to another work package for the ATF-1 irradiation campaign in the milestone M3FT-14OR0202251.

  20. CHARACTERIZATION OF PRESOLAR MATERIAL IN THE CR CHONDRITE NORTHWEST AFRICA 852

    SciTech Connect (OSTI)

    Leitner, J.; Hoppe, P. [Max Planck Institute for Chemistry, Particle Chemistry Department, P.O. Box 3060, 55020 Mainz (Germany); Vollmer, C. [Institut fuer Mineralogie, Westfaelische Wilhelms-Universitaet, 48149 Muenster (Germany); Zipfel, J., E-mail: jan.leitner@mpic.de [Forschungsinstitut und Naturmuseum Senckenberg, Sektion Meteoritenforschung, Senckenberganlage 25, 60325 Frankfurt (Germany)

    2012-01-20T23:59:59.000Z

    We investigated the inventory of presolar silicate, oxide, and silicon carbide (SiC) grains in the CR2 chondrite Northwest Africa (NWA) 852. Thirty-one O-anomalous grains were detected: 24 were identified as silicates ({approx}78 ppm); the remaining 7 are Al-rich oxides ({approx}38 ppm). NWA 852 is the first C2 chondrite containing O-anomalous presolar dust in concentrations comparable to other more primitive meteorites. Eight presolar SiC grains have been found, representing the highest abundance ({approx}160 ppm) observed so far in primitive meteorites. {sup 15}N-enriched matter is also present, although very heterogeneously distributed. Twenty-six of the O-anomalous grains are enriched in {sup 17}O, originating from the outflows of low-mass asymptotic giant branch (AGB) stars. We calculate a silicate/oxide abundance ratio of {approx}2, which indicates a higher degree of aqueous alteration than observed for other presolar-grain-rich meteorites. NWA 852 thus stands between the presolar-grain-rich CR3 chondrites (MET 00426, QUE 99177) and CR2 chondrites with low presolar grain abundances (Renazzo, NWA 530). We calculate an initial presolar silicate abundance of {approx}800 ppm for NWA 852, if silicate destruction by aqueous alteration is taken into account. Transmission electron microscope (TEM) investigation of one presolar Al-rich grain of an AGB star origin revealed that the grain mainly consists of a single crystal of hibonite with slightly varying orientations. A distinct subgrain (d < 100 nm) with a Ca/Ti ratio of {approx}1 is located in the central region, most likely indicating a perovskite-like phase. Our data suggest this phase to be a primary condensate and not an alteration product.

  1. Microstructural examination of V-(4-5%) Cr-(4-5%)Ti irradiated in X530

    SciTech Connect (OSTI)

    Gelles, D.S. [Pacific Northwest National Lab., Richland, WA (United States); Chung, H.M. [Argonne Natinonal Lab., IL (United States)

    1997-08-01T23:59:59.000Z

    Microstructural examination results are reported for two heats of V-(4-5%)Cr-(4-5%)Ti irradiated in the X530 experiment to {approximately}400{degrees}C to provide an understanding of the microstructural evolution that may be associated with degradation of mechanical properties. Fine precipitates were observed in high density intermixed with small defect clusters for all conditions examined following the irradiation. The irradiation-induced precipitation does not appear to be affected by preirradiation heat treatment at 950-1125{degrees}C. There was no evidence for a significant density of large (diameter >10 nm) dislocation loops or network dislocations.

  2. Determination of mechanical properties of Ni-Cr-P amorphous alloys

    E-Print Network [OSTI]

    Kondlapudi, Swaroop Kumar R

    2012-06-07T23:59:59.000Z

    DETERMINATION OF MECHANICAL PROPERTIES OF Ni-Cr-P AMORPHOUS ALLOYS A Thesis by SWAROOP KUMAR R. KONDLAPUDI Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree.... Kondlapudi, B. E. , Qsmania University Co-Chairs of Advisory Committee : Dr. A. wolfenden Dr. R. Griffin A study of the mechanical properties of Ni80 xCrxPgp amorphous alloys (x = 0 to 40 at% in steps of 5. 0) has been undertaken at Texas A&M University...

  3. Oxidation Characteristics of Fe-18Cr-18Mn-stainless alloys

    SciTech Connect (OSTI)

    James Rawers

    2010-10-01T23:59:59.000Z

    Air oxidation studies of Fe-18Cr-18Mn stainless steels were conducted at 525°C, 625°C, and 725°C. Alloys were evaluated with respect to changes in oxidation properties as a result of interstitial additions of nitrogen and carbon and of minor solute additions of silicon, molybdenum, and nickel. Interstitial concentrations possibly had a small, positive effect on oxidation resistance. Minor solute additions significantly improved oxidation resistance but could also reduce interstitial solubility resulting in formation of chromium carbides. Loss of solute chromium resulted in a slight reduction in oxidation protection. Oxidation lasting over 500 hours produced a manganese rich, duplex oxide structure: an outer sesquioxide and an inner spinel oxide.

  4. Audit Report: CR-B-95-06 | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energyon ArmedWaste andAccess to OUO AccessOpportunity | Department7-26CR-B-95-06 Audit

  5. Audit Report: CR-B-96-01 | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energyon ArmedWaste andAccess to OUO AccessOpportunity | Department7-26CR-B-95-06

  6. Audit Report: CR-B-97-04 | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energyon ArmedWaste andAccess to OUO AccessOpportunity |Report: CR-B-97-04 Audit Report:

  7. Audit Report: CR-B-98-01 | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energyon ArmedWaste andAccess to OUO AccessOpportunity |Report: CR-B-97-04 Audit Report:8-01

  8. Audit Report: CR-B-98-02 | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energyon ArmedWaste andAccess to OUO AccessOpportunity |Report: CR-B-97-04 Audit

  9. Audit Report: CR-FS-96-03 | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energyon ArmedWaste andAccess to OUO AccessOpportunity |Report: CR-B-97-04

  10. NUREG/CR-0413 ANLlES-67 Distribution Code: RE ARGONNE NATIONAL LABORATORY

    Office of Legacy Management (LM)

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou$0.C. 20545 OCT 28 1% - :NEW YORICNUREG/CR-0413

  11. Grain boundary depletion and migration during selective oxidation of Cr in

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFun with Big Sky LearningGet AssistanceCatalytic SitesEmployee, Retireea Ni-5Cr

  12. Audit Report: CR-B-01-01 | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustionImprovement3--Logistical5/08 Attendance List from 12/05/08 Attendance5Operations TheCR-B-01-01

  13. Video Primal Sketch: A Generic Middle-Level Representation of Video Institute for Information and System Sciences

    E-Print Network [OSTI]

    Zhu, Song Chun

    Video Primal Sketch: A Generic Middle-Level Representation of Video Zhi Han Zongben Xu Institute This paper presents a middle-level video representation named Video Primal Sketch (VPS), which integrates two. This paper makes three contributions: i) learning a dictionary of video primitives as parametric generative

  14. Carbon isotope chemostratigraphy of the Middle Riphean type section (Avzyan Formation, Southern Urals, Russia)

    E-Print Network [OSTI]

    Perfect, Ed

    Urals, Russia): Signal recovery in a fold-and-thrust belt Julie K. Bartley a,, Linda C. Kah b , Julie L The Avzyan Formation of the southern Ural Mountains, Russia, forms part of the Middle Riphean (1300­1000 Ma Mesoproterozoic age. © 2006 Elsevier B.V. All rights reserved. Keywords: Mesoproterozoic; Russia; Urals; Carbonate

  15. Middle Pleistocene glaciation in Patagonia dated by cosmogenic-nuclide measurements on outwash gravels

    E-Print Network [OSTI]

    Middle Pleistocene glaciation in Patagonia dated by cosmogenic-nuclide measurements on outwash beryllium-10 Last Glacial Maximum The well-preserved glacial record in Argentine Patagonia offers a ~1 Ma in other parts of Patagonia. © 2009 Elsevier B.V. All rights reserved. 1. Introduction The aim

  16. Research and management of soil, plant, animal, and human resources in the Middle Rio Grande Basin

    E-Print Network [OSTI]

    Research and management of soil, plant, animal, and human resources in the Middle Rio Grande Basin in 1994 called. "Ecology, diversity, and sustainability of soil, plant, animal, and human resources, Diversity, and Sustainability of Soil, Plant, Animal, and Human resources of the Rio Grande Basin" (Finch

  17. Prof. Dr. May-Britt Kallenrode Fachbereich Physik Ionisation of the Middle Atmosphere by

    E-Print Network [OSTI]

    Kallenrode, May-Britt

    DFG as part of the DFG-B¨undelantrag `Climatology and processes in the polar upper and middle.1.3 Atmospheric climatology and energetic particles on long time scales . . . . . . . . 5 2.2 Applicant's previous: Geomagnetic variations and polar cap tomography (5 month) . . . . . . . . . . . . . 8 3.5 W5: Climatology

  18. Classes Entering Fall 2009 and Fall 2010 Last Name: First Name: Middle Ini2al

    E-Print Network [OSTI]

    Afshari, Ehsan

    Classes Entering Fall 2009 and Fall 2010 Last Name: First Name: Middle Ini2 ini2als for agreement: Date: From the courses listed in the tables above, iden2fy Wri2ng Advisor Approved Ini2als: Date: Probability & Sta2s2cs Final ECE Approval: Advanced

  19. Thermal maturity of the Upper Triassic-Middle Jurassic Shemshak Group (Alborz Range, Northern Iran)

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Iran) based on organic petrography, geochemistry and basin modelling: implications for source rock1 Thermal maturity of the Upper Triassic-Middle Jurassic Shemshak Group (Alborz Range, Northern Iran. Organic matter (OM) has been investigated using Rock-Eval pyrolysis, elemental analysis

  20. Student Declaration of Absence Last Name First Name Middle Name U of S Student Number

    E-Print Network [OSTI]

    Saskatchewan, University of

    Student Declaration of Absence Last Name First Name Middle Name U of S Student Number 1 Address, number and section Reason for missed academic requirement(s) STUDENT DECLARATION I certify that I missed the academic requirements of the course listed above. I understand that (per Article II (o) of the Student

  1. School School 1 Abraham Lincoln Elementary School 34 Madera Middle school

    E-Print Network [OSTI]

    Chen, Wei

    School School 1 Abraham Lincoln Elementary School 34 Madera Middle school 2 Alcott High School 35 Mahalia Jackson Elementary 3 Amundsen High School 36 Michelle Clark 4 ASPIRA Early College 37 Morgan Park High School 5 Benito Juarez High School 38 Muchin college Prep 6 Brentano Academy 39 Nash Elementary

  2. Strengths and limitations of MST radar measurements of middle-atmosphere winds

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    levels of the atmosphere. 1 Introduction Radars used for atmospheric wind measurements cover a broadStrengths and limitations of MST radar measurements of middle-atmosphere winds W. K. Hocking for many years to measure atmospheric motions over a wide range of altitudes, from ground level up

  3. Version 28Oct11a Revolution & War: Geopolitics of the Middle East and

    E-Print Network [OSTI]

    O'Donnell, Tom

    at http://www.iea.org/ Especially the World Energy Outlook (WEO) 10) CIA Country Briefs at http://www.cia.gov/cia/publications/factbook/ 11) BP Statistical Review of World Energy, and Historical Data Series since 1965: http://www.mei.edu/Publications/WebPublications.aspx 2) Middle East web maps http://www.mideastweb.org/maps.htm 3) Energy and Geopolitical Risk

  4. Vendor Phone Vendor Fax Last Name First Name Middle Initial Phone Number

    E-Print Network [OSTI]

    de Lijser, Peter

    Vendor Phone Vendor Fax Last Name First Name Middle Initial Phone Number Vendor Name/Contact Name of Household Goods Vendor Quotation # Rooms to Move Preparer Fax INSTRUCTIONS 2. Select a vendor from the approved vendor list on the Travel Operations website http

  5. GRAVITY WAVE DYNAMICS AND EFFECTS IN THE MIDDLE David C. Fritts and M. Joan Alexander

    E-Print Network [OSTI]

    Alexander, M. Joan

    GRAVITY WAVE DYNAMICS AND EFFECTS IN THE MIDDLE ATMOSPHERE David C. Fritts and M. Joan Alexander gravity waves have been a subject of intense research activity in recent years because of their myriad. Theoretical, numerical, and observational studies have advanced our understanding of gravity waves on many

  6. Centre for Arab and Islamic Studies (The Middle East & Central Asia)

    E-Print Network [OSTI]

    present included The Hon. Tim Fischer, HE Mr Khalifa Al-Falasi, Ambassador of the United Arab Emirates for the support he has provided to the Centre during his posting as Ambassador of the United Arab EmiratesCentre for Arab and Islamic Studies (The Middle East & Central Asia) BULLETINCENTRE FOR ARAB

  7. Middle distillate hydrotreatment zeolite catalysts containing Pt/Pd or Ni

    E-Print Network [OSTI]

    Marin-Rosas, Celia

    2009-05-15T23:59:59.000Z

    A study on middle distillate hydrotreatment zeolite catalysts containing Pt/Pd and/or Ni was performed. The effect of the addition of the corresponding CoMo, CoMoPd, CoMoPtPd and CoMoNi in PdNiPt-zeolite, Pt-zeolite, Ni-zeolite, and Pd...

  8. A new middle Holocene varve diagram from the river hgermanalven, northern Sweden: indications for a possible

    E-Print Network [OSTI]

    Wohlfarth, Barbara

    A new middle Holocene varve diagram from the river hgermanalven, northern Sweden: indications of Sweden, Bos 670, S- 751 28 Ujipsulu, Sweden; Giiran Possnert, Tandem Luboruturl: Box 533. S-75121 Uppsalu Sweden: indications for a possible error in the Holocene varve The importance of annually laminated

  9. Organic geochemical evidence for pine tar production in middle Eastern Sweden during the Roman Iron Age

    E-Print Network [OSTI]

    Organic geochemical evidence for pine tar production in middle Eastern Sweden during the Roman Iron Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden b Upplands muse´et, St: Eriks gra¨nd 6, SE-753 10 Uppsala, Sweden Received 21 September 2004; received in revised form 15 June 2005; accepted 21

  10. A lowstand epikarstic intertidal flat from the middle Silurian of Gotland, Sweden

    E-Print Network [OSTI]

    Calner, Mikael

    A lowstand epikarstic intertidal flat from the middle Silurian of Gotland, Sweden Mikael Calner, Sweden Received 17 August 2000; accepted 29 June 2001 Abstract This paper describes the sedimentology the Klintehamn area on western Gotland (Sweden). The epikarst represents the most distal portion

  11. Understanding the Middle Miocene Climatic Optimum: Evaluation of Deuterium Values (D) Related to

    E-Print Network [OSTI]

    Blais, Brian

    when aHempFng to model and to forecast climate change · Some processes climate, but also had lower levels of CO2 (Yao, 2009) · What drove this changeUnderstanding the Middle Miocene Climatic Optimum: Evaluation of Deuterium

  12. Sinotragus (Bovidae, Mammalia) from Turkey, and the Late Miocene Middle Asiatic Province Denis Geraads -Paris

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Sinotragus (Bovidae, Mammalia) from Turkey, and the Late Miocene Middle Asiatic Province Denis near Mula (Turkey) has yielded several specimens of the Bovid Sinotragus, a genus previously known only in Late Miocene times. The discovery of Sinotragus in Turkey thus confirms an idea already put forward 50

  13. Response of the middle atmosphere to CO2 doubling: results from the Canadian

    E-Print Network [OSTI]

    Wirosoetisno, Djoko

    an increase in solar heating and a decrease in infrared cooling, with the latter accounting for up to 15 of SST changes are a warmer troposphere, a warmer and higher tropopause, cell-like structures of heating on the associated warming effects in the troposphere. In the middle atmosphere, the en- hanced infrared emission

  14. Effects of motivational strategies on middle school mathematics students' on-task behavior

    E-Print Network [OSTI]

    Butler, Lori

    2002-01-01T23:59:59.000Z

    or extrinsically motivating. Purposefully selected students were observed for their behavior following the use of a motivational strategy. Their behavior was coded as either on or off-task. It was found that these middle school mathematics teachers tend to use...

  15. Poverty Reduction during the Rural-Urban Transformation -The Role of the Missing Middle *

    E-Print Network [OSTI]

    Krivobokova, Tatyana

    Poverty Reduction during the Rural-Urban Transformation - The Role of the Missing Middle * Luc (rural diversification versus agglomeration in mega-cities) affects the rate of poverty reduction towns ) is strongly associated with poverty reduction, while expansion of mega-cities is not. Migration

  16. Integrated Design, Operation and Control of Batch Extractive Distillation with a Middle Vessel

    E-Print Network [OSTI]

    Skogestad, Sigurd

    into a number of product fractions in a single batch column whereas, in continuous distillation several columnsIntegrated Design, Operation and Control of Batch Extractive Distillation with a Middle Vessel E. K distillation for separating homogeneous minimum-boiling azeotropic mixtures, where the extractive agent

  17. Kinetics and Mechanisms of Potassium Release from Sandy Middle Atlantic Coastal Plain Soils1

    E-Print Network [OSTI]

    Sparks, Donald L.

    Kinetics and Mechanisms of Potassium Release from Sandy Middle Atlantic Coastal Plain Soils1 M. C.) grown on these soils did not respond to K applications. The soils contained high levels of total K, and was contained in the sand fractionsof the soils. Kineticsof K release from the whole soils and from the coarse

  18. SATELLITE MEASUREMENTS OF MIDDLE ATMOSPHERIC IMPACTS BY SOLAR PROTON EVENTS IN SOLAR CYCLE 23

    E-Print Network [OSTI]

    Jackman, Charles H.

    SATELLITE MEASUREMENTS OF MIDDLE ATMOSPHERIC IMPACTS BY SOLAR PROTON EVENTS IN SOLAR CYCLE 23 C. H) Abstract. Solar cycle 23 was extremely active with seven of the largest twelve solar proton events (SPEs for several months past the solar events in the winter polar regions because of the enhanced NOy. Keywords

  19. Archaeofauna 17 (2008): 63-76 Intertidal shellfish use during the Middle

    E-Print Network [OSTI]

    they lived at lower population densities. KEYWORDS: MOLLUSKS, SHELLFISH, LIMPETS, SOUTH AFRICA, MIDDLE STONE, environmen- tal changes, and human population densities, and we particularly aim to address issues sur AGE, LATER STONEAGE, HUMAN POPULATION DENSITY, MODERN HUMAN ORIGINS RESUMEN: Los yacimientos costeros

  20. Program Director/Principal Investigator (Last, First, Middle): DETAILED BUDGET FOR INITIAL BUDGET PERIOD

    E-Print Network [OSTI]

    Ungerleider, Leslie G.

    Program Director/Principal Investigator (Last, First, Middle): DETAILED BUDGET FOR INITIAL BUDGET SUBTOTAL DIRECT COSTS FOR INITIAL BUDGET PERIOD (Item 7a, Face Page) $ CONSORTIUM/CONTRACTUAL COSTS FACILITIES AND ADMINISTRATIVE COSTS TOTAL DIRECT COSTS FOR INITIAL BUDGET PERIOD $ PHS 398 (Rev. 6/09) Page

  1. Program Director/Principal Investigator (Last, First, Middle): DETAILED BUDGET FOR NEXT BUDGET

    E-Print Network [OSTI]

    Baker, Chris I.

    Program Director/Principal Investigator (Last, First, Middle): DETAILED BUDGET FOR NEXT BUDGET by category) OTHER EXPENSES (Itemize by category) SUBTOTAL DIRECT COSTS FOR NEXT BUDGET PERIOD $ CONSORTIUM FOR NEXT BUDGET PERIOD (Item 8a, Face Page) $ Page Form Page 2PHS 2590 (Rev. 08/12) #12;

  2. Program Director/Principal Investigator (Last, First, Middle): DETAILED BUDGET FOR INITIAL BUDGET PERIOD

    E-Print Network [OSTI]

    Baker, Chris I.

    Program Director/Principal Investigator (Last, First, Middle): DETAILED BUDGET FOR INITIAL BUDGET SUBTOTAL DIRECT COSTS FOR INITIAL BUDGET PERIOD (Item 7a, Face Page) $ CONSORTIUM/CONTRACTUAL COSTS FACILITIES AND ADMINISTRATIVE COSTS TOTAL DIRECT COSTS FOR INITIAL BUDGET PERIOD $ Page Form Page 4 PHS 398

  3. On the approximation of local and linear radiative damping in the middle

    E-Print Network [OSTI]

    Wirosoetisno, Djoko

    atmosphere. In general, this damping is a nonlocal process in which heat is transferred to and from remote form 13 November 2009) ABSTRACT The validity of approximating radiative heating rates in the middle'') is investigated. Using radiative heating rate and temperature output from a chemistry­climate model with realistic

  4. Engineering Challenge Camp 3 *--MIDDLE SCHOOL STUDENTS July 23-27, 2012

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    Engineering Challenge Camp 3 *--MIDDLE SCHOOL STUDENTS July 23- 27, 2012 West Virginia University Benjamin M. Statler College of Engineering and Mineral Resources Monday, July 23, 2012 Mechanical Engineering Day 9:00-10:00 am: Scientific process/ Learning to work in groups 10:00-11:00 am: Applying

  5. Mountain Precipitation and Hydrology in the Middle East Ronald. B. Smith*, Jason Evans*, Robert Oglesby**

    E-Print Network [OSTI]

    Evans, Jason

    Mountain Precipitation and Hydrology in the Middle East Ronald. B. Smith*, Jason Evans*, Robert shadow effect. Recent studies have tried to quantify this effect on Alpine terrain [Smith et al. 2003a model of this is the response to heating in a steady stratified stream [Smith and Lin, 1982

  6. Carbonate facies and biostratigraphy of the middle Magdalena, Hueco Mountains, west Texas

    E-Print Network [OSTI]

    Lambert, Lance Lee

    2012-06-07T23:59:59.000Z

    Pennsylvanian strata. The overlying middle Magdalene becomes increasingly resistant above the carbonate rubbles, and consists mostly of phylloid algal deposits interbedded with associated skeletal wackestones and packstones. This stratigraphic succession.... Terminology. 3 7 9 13 13 17 20 23 23 26 28 LITHOLOGY 32 Introduction Lithofacies Preface D~l F Characterization. Interpretation. Foram Calcarenite Facies Characterization. Interpretation. Skeletal Wackestone Facies Characterization...

  7. Upper Middle Mainstem Columbia River Subbasin Water Quality Parameters Affected by Hydropower Production

    E-Print Network [OSTI]

    Appendix E Upper Middle Mainstem Columbia River Subbasin Water Quality Parameters Affected have reappeared as management agencies have reinstituted spill as a means of aiding downstream fish passage throughout the system. The WDOE has set a TDG standard of 110 percent of saturation for all

  8. Permeable Reactive Biobarriers for In Situ Cr(VI) Reduction: Bench Scale Tests Using Cellulomonas sp. Strain ES6

    SciTech Connect (OSTI)

    Sridhar Viamajala; Brent M. Peyton; Robin Gerlach; Vaideeswaran; William A. Apel; James N. Petersen

    2008-12-01T23:59:59.000Z

    Chromate (Cr(VI)) reduction studies were performed in bench scale flow columns using the fermentative subsurface isolate Cellulomonas sp. strain ES6. In these tests, columns packed with either quartz sand or hydrous ferric oxide (HFO)-coated quartz sand, were inoculated with strain ES6 and fed nutrients to stimulate growth before nutrient-free Cr(VI) solutions were injected. Results show that in columns containing quartz sand, a continuous inflow of 2 mg/L Cr(VI) was reduced to below detection limits in the effluent for durations of up to 5.7 residence times after nutrient injection was discontinued proving the ability of strain ES6 to reduce chromate in the absence of an external electron donor. In the HFO-containing columns, Cr(VI) reduction was significantly prolonged and effluent Cr(VI) concentrations remained below detectable levels for periods of up to 66 residence times after nutrient injection was discontinued. Fe was detected in the effluent of the HFO-containing columns throughout the period of Cr(VI) removal indicating that the insoluble Fe(III) bearing solids were being continuously reduced to form soluble Fe(II) resulting in prolonged abiotic Cr(VI) reduction. Thus, growth of Cellulomonas within the soil columns resulted in formation of permeable reactive barriers that could reduce Cr(VI) and Fe(III) for extended periods even in the absence of external electron donors. Other bioremediation systems employing Fe(II)-mediated reactions require a continuous presence of external nutrients to regenerate Fe(II). After depletion of nutrients, contaminant removal within these systems occurs by reaction with surface-associated Fe(II) that can rapidly become inaccessible due to formation of crystalline Fe-minerals or other precipitates. The ability of fermentative organisms like Cellulomonas to reduce metals without continuous nutrient supply in the subsurface offers a viable and economical alternative technology for in situ remediation of Cr(VI)-contaminated groundwater through formation of permeable reactive biobarriers (PRBB).

  9. Effect of V and Ta on the precipitation behavior of 12%Cr reduced activation ferrite/martensite steel

    SciTech Connect (OSTI)

    Xiao, Xiang [School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083 (China); Liu, Guoquan, E-mail: g.liu@ustb.edu.cn [School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083 (China); State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083 (China); Hu, Benfu; Wang, Jinsan [School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083 (China); Ullah, Asad [School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083 (China); Department of Mathematics, Karakoram International University, Gilgit-Baltistan (Pakistan)

    2013-08-15T23:59:59.000Z

    12%Cr reduced activation ferrite/martensite steels are promising candidate materials for good corrosion and irradiation resistance used for supercritical water-cooled reactor cladding and in-core components. V and Ta are considered to have improved the creep strength of high Cr steels by precipitating as MX phase. In this paper, a series of trial products microalloyed with V and V–Ta are produced, and the microstructure is characterized after quenching at 1050 °C and tempering at 780 °C by using TEM method to investigate the effect of these elements on the precipitation behavior of 12%Cr reduced activation ferrite/martensite steel. The results from both the experimental observations and thermodynamic and kinetic calculations reveal that V and V–Ta can promote the stable MX precipitation instead of M{sub 2}X, thus increasing the volume fraction of M{sub 23}C{sub 6}. Two-phase separation behavior of the (Ta, V)(C, N) carbonitride into a Ta(V)C(N) phase and a V(Ta)N(C) phase in 12Cr3WVTa steel is observed and further discussed. - Highlights: • Microalloyed with V and V-Ta can promote the precipitation of MX instead of M{sub 2}X. • The presence of delta-ferrite in microstructure affects the morphology of MX. • Two-phase separation of MX carbonitride was observed in 12Cr3WVTa steel.

  10. Corrosion property of 9Cr-ODS steel in nitric acid solution for spent nuclear fuel reprocessing

    SciTech Connect (OSTI)

    Takeuchi, M.; Koizumi, T. [Japan Atomic Energy Agency, Tokai-mura, Naka-gun, Ibaraki 319-1195 (Japan); Inoue, M.; Koyama, S.I. [Japan Atomic Energy Agency, Oarai-machi, Higashi-ibaraki-gun, Ibaraki 311-1393 (Japan)

    2013-07-01T23:59:59.000Z

    Corrosion tests of oxide dispersion strengthened with 9% Cr (9Cr-ODS) steel, which is one of the desirable materials for cladding tube of sodium-cooled fast reactors, in pure nitric acid solution, spent FBR fuel solution, and its simulated solution were performed to understand the corrosion behavior in a spent nuclear fuel reprocessing. In this study, the 9Cr-ODS steel with lower effective chromium content was evaluated to understand the corrosion behavior conservatively. As results, the tube-type specimens of the 9Cr-ODS steels suffered severe weight loss owing to active dissolution at the beginning of the immersion test in pure nitric acid solution in the range from 1 to 3.5 M. In contrast, the weight loss was decreased and they showed a stable corrosion in the higher nitric acid concentration, the dissolved FBR fuel solution, and its simulated solution by passivation. The corrosion rates of the 9Cr-ODS steel in the dissolved FBR fuel solution and its simulated solution were 1-2 mm/y and showed good agreement with each other. The passivation was caused by the shift of corrosion potential to noble side owing to increase in nitric acid concentration or oxidative ions in the dissolved FBR fuel solution and the simulated spent fuel solution. (authors)

  11. Clinch River - Environmental Restoration Program (CR-ERP) study, Ambient water toxicity

    SciTech Connect (OSTI)

    Simbeck, D.J.

    1997-06-01T23:59:59.000Z

    Clinch River - Environmental Restoration Program (CR-ERP) personnel and Tennessee Valley Authority (TVA) personnel conducted a study during the week of January 25-February 1, 1994, as described in the Statement of Work (SOW) document. The organisms specified for testing were larval fathead minnows, Pimephales promelas, and the daphnid, Ceriodaphnia dubia. Surface water samples were collected by TVA Field Engineering personnel from Clinch River Mile 9.0, Poplar Creek Mile 1.0, and Poplar Creek Mile 2.9 on January 24, 26, and 28. Samples were partitioned (split) and provided to the CR-ERP and TVA toxicology laboratories for testing. Exposure of test organisms to these samples resulted in no toxicity (survival or growth) to fathead minnows; however, toxicity to daphnids (significantly reduced reproduction) was demonstrated in undiluted samples from Poplar Creek Mile 1.0 in testing conducted by TVA based on hypothesis testing of data. Point estimation (IC{sub 25}) analysis of the data, however, showed no toxicity in PCM 1.0 samples.

  12. Solidification characterization of a new rapidly solidified Ni-Cr-Co based superalloy

    SciTech Connect (OSTI)

    Wu, Kai, E-mail: wk-ustb@163.com [School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083 (China)] [School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083 (China); Liu, Guoquan [School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083 (China) [School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083 (China); State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083 (China); Hu, Benfu [School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083 (China)] [School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083 (China); Li, Feng [Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB2 3QZ (United Kingdom)] [Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB2 3QZ (United Kingdom); Zhang, Yiwen [School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083 (China) [School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083 (China); High Temperature Materials Research Institution, CISRI, Beijing 100081 (China); Tao, Yu; Liu, Jiantao [High Temperature Materials Research Institution, CISRI, Beijing 100081 (China)] [High Temperature Materials Research Institution, CISRI, Beijing 100081 (China)

    2012-11-15T23:59:59.000Z

    The solidification characterization of a new rapidly solidified Ni-Cr-Co based superalloy prepared by plasma rotating electrode process was investigated by means of optical microscope, scanning electron microscope, and transmission electron microscope. The results show that the solidification microstructure changes from dendrites to cellular and microcrystal structures with decreasing powder size. The elements of Co, Cr, W and Ni are enriched in the dendrites, while Mo, Nb and Ti are higher in the interdendritic regions. The relationships between powder size with the average solid-liquid interface moving rate, the average interface temperature gradient and the average cooling rate are established. Microsegregation is increased with larger powder size. The geometric integrity of MC Prime type carbides in the powders changes from regular to diverse with decreasing powder size. The morphology and quantity of carbides depend on the thermal parameters and non-equilibrium solute partition coefficients during rapid solidification. - Highlights: Black-Right-Pointing-Pointer The relations of solidification thermal parameters with powder size are established. Black-Right-Pointing-Pointer The relation of non-equilibrium solute partition with powder size is investigated. Black-Right-Pointing-Pointer The solidification microstructure is related to thermal parameters. Black-Right-Pointing-Pointer The segregation behavior is linked to non-equilibrium partition coefficients. Black-Right-Pointing-Pointer The morphology and quantity of carbides depend on the above combined factors.

  13. Localized Corrosion of a Neutron Absorbing Ni-Cr-Mo-Gd Alloy

    SciTech Connect (OSTI)

    R.E. Mizia; T. E. Lister; P. J. Pinhero; T. L. Trowbridge

    2005-04-01T23:59:59.000Z

    The National Spent Nuclear Fuel Program, located at the Idaho National Laboratory (INL), has developed a new nickel-chromium-molybdenum-gadolinium structural alloy for storage and long-term disposal of spent nuclear fuel (SNF). The new alloy will be used for SNF storage container inserts for nuclear criticality control. Gadolinium has been chosen as the neutron absorption alloying element due to its high thermal neutron absorption cross section. This alloy must be resistant to localized corrosion when exposed to postulated Yucca Mountain in-package chemistries. The corrosion resistance properties of three experimental heats of this alloy are presented. The alloys performance are be compared to Alloy 22 and borated stainless steel. The results show that initially the new Ni-Cr-Mo-Gd alloy is less resistant to corrosion as compared to another Ni-Cr-Mo-Gd alloy (Alloy 22); but when the secondary phase that contains gadolinium (gadolinide) is dissolved, the alloy surface becomes passive. The focus of this work is to qualify these gadolinium containing materials for ASME code qualification and acceptance in the Yucca Mountain Repository.

  14. Discovery of Optical Bursts from MS1603.6+2600 = UW CrB

    E-Print Network [OSTI]

    R. I. Hynes; E. L. Robinson; E. Jeffery

    2004-05-11T23:59:59.000Z

    We report the discovery of several optical burst-like events from the low-mass X-ray binary MS1603.6+2600 (UW CrB). The events last for a few tens of seconds, exhibit a very fast rise and slow decay, and involve optical brightening of a factor of 2-3. The flares appear distinct from the lower level flickering and instead strongly resemble reprocessed type-I X-ray bursts as seen in a number of other neutron star low-mass X-ray binaries. In conjunction with the previously reported candidate X-ray burst, these confirm that the compact object in UW CrB is a neutron star. We examine the optical burst brightness and recurrence times and discuss how the nature of the system can be constrained. We conclude that the source is most likely an accretion disk corona source at an intermediate distance, rather than a nearby quiescent system or very distant dipper.

  15. Demonstrations of diode-pumped and grating-tuned ZnSe:Cr{sup 2+} lasers

    SciTech Connect (OSTI)

    Page, R.H.; Skidmore, J.A.; Schaffers, K.I.; Beach, R.J.; Payne, S.A.; Krupke, W.F.

    1996-09-01T23:59:59.000Z

    Within the last few years, divalent-transition-metal-doped II-VI material class has been proposed as source of new tunable mid-IR lasers. Cr{sup 2+} is a prime laser candidate on account of its high luminescence quantum yield and the expectation that ESA would be absent. The first ZnSe:Cr{sup 2+} laser demonstrations were conducted in an end-pumped geometry with a tightly focused (0.2 mm spot) MgF{sub 2}-Co{sup 2+} laser beam, for a peak pump intensity well over 100 kW/cm{sup 2}, so laser threshold was easily reached. Grating tuning experiments were done by replacing the cavity high-reflector with a diffraction grating. The diode array was removed and pump beam from a MgF{sub 2}:Co{sup 2+} laser was focused onto the crystal using the same cylindrical lens. Output wavelengths were checked with a monochromator. The long-wavelength limit of operation was 2799 nm. Short-wavelength cutoff was 2134 nm; even though the emission cross section remains substantial, self-absorption inhibits laser operation.

  16. Effect of prior cold work on age hardening of Cu-3Ti-1Cr alloy

    SciTech Connect (OSTI)

    Markandeya, R. [Department of Metallurgical Engineering, College of Engineering, Jawaharlal Nehru Technological University, Kukatpally, Hyderabad-500 072 (India); Nagarjuna, S. [Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad-500 058 (India)]. E-mail: snagarjuna1@rediffmail.com; Sarma, D.S. [Department of Metallurgical Engineering, Institute of Technology, Banaras Hindu University, Varanasi-221 005 (India)

    2006-12-15T23:59:59.000Z

    The influence of 50%, 75% and 90% cold work on the age hardening behavior of Cu-3Ti-1Cr alloy has been investigated by hardness and tensile tests, and light optical and transmission electron microscopy. Hardness increased from 118 Hv in the solution-treated condition to 373 Hv after 90% cold work and peak aging. Cold deformation reduced the peak aging time and temperature of the alloy. The yield strength and ultimate tensile strength reached a maximum of 1090 and 1110 MPa, respectively, following 90% deformation and peak aging. The microstructure of the deformed alloy exhibited elongated grains and deformation twins. The maximum strength on peak aging was obtained due to precipitation of the ordered, metastable and coherent {beta}'-Cu{sub 4}Ti phase, in addition to high dislocation density and deformation twins. Over-aging resulted in decreases in hardness and strength due to the formation of incoherent and equilibrium {beta}-Cu{sub 3}Ti phase in the form of a cellular structure. However, the morphology of the discontinuous precipitation changed to a globular form on high deformation. The mechanical properties of Cu-3Ti-1Cr alloy are superior to those of Cu-2.7Ti, Cu-3Ti-1Cd and the commercial Cu-0.5Be-2.5Co alloys in the cold-worked and peak-aged condition.

  17. The effects of the middle school concept on student achievement as identified by principals and the Academic Excellence Indicator System (AEIS) reports in selected middle schools in Texas

    E-Print Network [OSTI]

    Brundrett, Robert Clinton

    2005-02-17T23:59:59.000Z

    ?Irvin ?and?the ?Scottish ?Rite ? Educational?and?Fellowship ?Program ?of ?Texas ?for ?their ?financial?support ?of ?my ? studies.?Their ?support ?made ?those ?seemingly ?unending ?tuition ?bills?seem ?a?little ? more?reasonable. ? Finally,? I...?have ?a?voice ?in ?their ? education?(Powell, ?2001).? ? Although?the ?body?of ?research ?on ?the ?middle ?school ?concept ?is ?growing, ? the?majority?of ?the ?studies ?are,?as ? of?late,?qualitative ?in ? nature.?If ?quantitative ? work?is ?done...

  18. Relationship of inquiry-based learning elements on changes in middle school students' science, technology, engineering, and mathematics (stem) beliefs and interests

    E-Print Network [OSTI]

    Degenhart, Heather Shannon

    2009-05-15T23:59:59.000Z

    characteristic of this classroom.” STEM interest change explained 55% of the variation in middle school students’ STEM belief change. Analyses indicated NSF Fellows and teachers affected the rate at which middle school students’ STEM beliefs and interests changed...

  19. Ab initio study on noncompensated CrO codoping of GaN for enhanced solar energy conversion

    SciTech Connect (OSTI)

    Pan, Hui [ORNL; Gu, Baohua [ORNL; Eres, Gyula [ORNL; Zhang, Zhenyu [ORNL

    2010-03-01T23:59:59.000Z

    We describe a novel photocatalyst obtained by codoping GaN with CrO, according to a new "noncompensated" codoping concept based on first-principles calculations. The approach enables controllable narrowing of the GaN band gap with significantly enhanced carrier mobility and photocatalytic activity in the visible light region and thus offers immense potential for application in solar energy conversion, water splitting, and a variety of solar-assisted photocatalysis. Our calculations indicate that the formation energy for the cation doping is greatly reduced by noncompensated codoping with an anion. Although Cr doping alone can split the band gap with the formation of an intermediate band, the mobility is low due to carrier trapping by the localized states. The first-principles calculations also demonstrate that CrO codoping of GaN shifts the Fermi level into the conduction band resulting in high carrier density and mobility.

  20. Microbial community changes during sustained Cr(VI) reduction at the 100H site in Hanford, WA

    SciTech Connect (OSTI)

    Chakraborty, Romy; Brodie, Eoin L; Faybishenko, Boris; Piceno, Yvette M; Tom, Lauren; Choudhuri, Swati; Beller, Harry R; Liu, Jenny; Torok, Tamas; Joyner, Dominique C; Joachimiak, Marcin P; Zhou, Aifen; Van Nostrand, Joy D; Zhou, Joe; Long, Phil E; Newcomer, Darrell R; Andersen, Gary L; Hazen, Terry C.

    2010-05-17T23:59:59.000Z

    Hexavalent Chromium is a widespread contaminant found in soil, sediment, and groundwater. In order to stimulate microbially-mediated reduction of Cr(VI), a poly-lactate compound (HRC) was injected into the Chromium-contaminated aquifer at the Hanford (WA) 100H site in 2004. Cr(VI) concentrations rapidly declined to below the detection limit and remained so for more than three years after injection. Based on the results of the bacterial community composition using high-density DNA 16S rRNA gene microarrays, we observed the community to transition through denitrifying, ironreducing and sulfate-reducing populations. As a result, we specifically focused isolation efforts on three bacterial species that were significant components of the community. Positive enrichments in defined anaerobic media resulted in the isolation of an iron-reducing Geobacter metallireducens-like isolate, a sulfate-reducing Desulfovibrio vukgaris-like strain and a nitrate-reducing Pseudomonas stutzeri-like isolate among several others. All of these isolates were capable of reducing Cr(VI) anoxically and have been submitted for genome sequencing to JGI. To further characterize the microbial, and geochemical mechanisms associated with in situ Cr(VI) reduction at the site, additional HRC was injected in 2008. The goal was to restimulate the indigenous microbial community and to regenerate the reducing conditions necessary for continued Cr(VI) bio-immobilization in the groundwater. Analysis of the microbial populations post-injection revealed that they recovered to a similar density as after the first injection in 2004. In this study, we present the results from our investigation into microbially-mediated Cr(VI) reduction at Hanford, and a comparison of the microbial community development following two HRC injections four years apart.

  1. Temperature dependence of dynamic Young's modulus and internal friction in three plasma sprayed NiCrAlY coating alloys

    E-Print Network [OSTI]

    Cook, Lloyd Steven

    1989-01-01T23:59:59.000Z

    TEMPERATURE DEPENDENCE OF DYNAM'IIC YOUNG'S MODULUS AND INTERNAL FRICTION IN THREE PLASMA SPRAYED NiCrAlY COATING -ALLOYS A Thesis LLOYD STEVEN COOK Submitted to the 08ice of Graduate Studies of Texas AE M University in part. al full...'illment of the requirement for the degree of MASTER OF SCIENCE August 1989 Itiajor Subject: l'dechanical Engineering TEMPERATURE DEPENDENCE OF DYNAMIC YOUNG'S MODULUS AND INTERNAL FRICTION IN THREE PLASMA SPRAYED NiCrAIY COATING ALLOYS A Thesis by LLOYD STEVEN COOK...

  2. Can one identify the intrinsic structure of the yrast states in {sup 48}Cr after the backbending?

    SciTech Connect (OSTI)

    Gao Zaochun; Chen, Y. S.; Chen, Y. J. [China Institute of Atomic Energy P.O. Box 275-10, Beijing 102413 (China); Horoi, Mihai [Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859 (United States); Tuya [College of Physics Science and Technology, Shenyang Normal University, ShenYang 110034 (China)

    2011-05-15T23:59:59.000Z

    The backbending phenomenon in {sup 48}Cr has been investigated using the recently developed projected configuration interaction (PCI) method, in which the deformed intrinsic states are directly associated with shell model wave functions. Two previous explanations, (i) K=0 band crossing and (ii) K=2 band crossing, have been reinvestigated using PCI, and it was found that both explanations can successfully reproduce the experimental backbending. The PCI wave functions in the pictures of K=0 band crossing and K=2 band crossing are highly overlapped. We conclude that there are no unique intrinsic states associated with the yrast states after backbending in {sup 48}Cr.

  3. Appl Nbr Full TiFirst Name Middle Name Last Name Sex Category PH Category 00036777 F ADITI GUPTA F GEN N

    E-Print Network [OSTI]

    Ribeiro, Vinay

    Appl Nbr Full TiFirst Name Middle Name Last Name Sex Category PH Category 00036777 F ADITI GUPTA F 00036674 F SRISHTI VIVEK SHARMA F GEN N Appl Nbr Full TiFirst Name Middle Name Last Name Sex Category PH) Appl Nbr Full TiFirst Name Middle Name Last Name Sex Category PH Category 00032299 F SANDEEP KUMAR

  4. Assessing middle school students` understanding of science relationships and processes. Final report

    SciTech Connect (OSTI)

    Schau, C.; Mattern, N.; Weber, R. [Univ. of New Nexico, Albuquerque, NM (United States); Minnick, K. [Minnick & Associates, Inc., Albuquerque, NM (United States)

    1994-09-01T23:59:59.000Z

    Our overall goal for this multi-year project is to develop and validate an alternative assessment format that effectively measures middle school students understanding of the relationships among selected science concepts and processes. In this project, we collaborate with the staff of the Los Alamos National Laboratory`s TOPS Program and the Programs participating teachers and their students. We also work with selected middle school science teachers from the TOPS program at Sandia National Laboratories. Our goal for this past year was to develop and field test informally a variety of potential measurement formats. This work has allowed us to identify formats to test during the validation phase of the project which will occur during the second year.

  5. Interactive chemical effects and instability of shale derived middle distillate fuels

    SciTech Connect (OSTI)

    Mushrush, G.W.; Beal, E.J.; Watkins, J.M.; Morris, R.E.; Hardy, D.R. (Fuels Section, Naval Research Lab., Washington, DC (US))

    1989-01-01T23:59:59.000Z

    This paper presents a study of instability of shale-derived fuels. Changes in fuel properties with time have been a continuing problem in the use of middle distillate fuels. The authors define instability as the formation of insoluble sediments and gums as well as the production of peroxides and color bodies. Nitrogen and sulfur heterocycles have long been implicated in fuel degradation, but present knowledge is limited regarding the chemistry of their autoxidation reactions in the complex fuel media. Based on the GC/MS identification of nitrogen heterocyclic constituents in several shale-derived middle distillate fuels, the authors have conducted gravimetric instability tests employing three model nitrogen heterocycles in shale-derived diesel fuels. Model sulfur compound dopant studies on shale-derived jet fuels were conducted by monitoring hydroperoxide formation/decomposition and the decreased quantity of sulfur compound. Potential interactive effects have been defined for these model dopants.

  6. Teaching, Learning, and Modeling with Geometry in the Middle and High School

    E-Print Network [OSTI]

    Lee, Carl

    , such as Geometer's Sketchpad, Cabri, and GeoGebra SketchUp POV-Ray (ray tracer) Blender (has features akin to both SketchUp and POV-Ray) -- used in some High School design classes Carl Lee (UK) MS and HS Geometry Fields InstituteAugust 2014 10 / 26 #12;Second Project: SketchUp in Middle School Partner and Project Initiator: Dr

  7. Tectonostratigraphic evolution of the Late Cretaceous Middle Eocene Haymana sedimentary Basin, Central Anatolia, Turkey.

    E-Print Network [OSTI]

    , Central Anatolia, Turkey. S Nairn1 , A H F Robertson1 , M Hempton2 and UC �nlügenç3 1 Grant Institute Shell UK 3 �ukurova Universitesi, Jeoloji Mühendisii Bölümü, Balcali, Adana, Turkey Steve of a study of the Late Cretaceous-Middle Eocene Haymana Basin in central Turkey. Based on detailed logging

  8. Conceptual and procedural understanding of algebra concepts in the middle grades

    E-Print Network [OSTI]

    Joffrion, Heather Kyle

    2007-04-25T23:59:59.000Z

    abstract skills required at the secondary level (Kieran & Chalouh, 1993). Stacey and MacGregor (1997) wrote of the 11 importance of laying a solid foundation for algebraic reasoning in the middle grades. They suggested that many aspects of algebraic... to discuss them in easily understood, everyday language, thus developing their conceptual understanding (Kieran & Chalouh, 1993). Conclusions Mathematics education researchers have made significant strides toward understanding the balance of procedural...

  9. Method for enriching a middle isotope using vibration-vibration pumping

    DOE Patents [OSTI]

    Rich, Joseph W. (East Aurora, NY); Homicz, Gregory F. (Getzville, NY); Bergman, Richard C. (Corfu, NY)

    1989-01-01T23:59:59.000Z

    Method for producing isotopically enriched material by vibration-vibration excitation of gaseous molecules wherein a middle mass isotope of an isotopic mixture including lighter and heavier mass isotopes preferentially populates a higher vibrational mode and chemically reacts to provide a product in which it is enriched. The method can be used for vibration-vibration enrichment of .sup.17 O in a CO reactant mixture.

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

    E-Print Network [OSTI]

    Artan, Sinem

    2012-07-16T23:59:59.000Z

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

  11. The distribution of n-alkanes in partially frozen middle distillate fuels

    SciTech Connect (OSTI)

    Van Winkle, T.L.; Affens, W.A.; Beal, E.J.; Hazlett, R.N.; Guzman, J.

    1986-04-01T23:59:59.000Z

    This work on partially frozen fuels is one of a continuing series of studies on the effect of composition on the freezing properties of hydrocarbon fuels. The method used for this purpose was reported previously. By means of this method the authors were able to determine the composition of the liquid and solid phases in partially frozen mixtures consisting of liquid and of solid crystals plus entrapped liquid. This paper presents the results of this study on five different middle distillate fuels.

  12. Quantitative measurement of Cr segregation in Co0.8xCrxPt0.1B0.1 recording media by scatter diagram analysis

    E-Print Network [OSTI]

    Krishnan, Kannan M.

    - trometry or electron energy-loss spectrometry EELS data at each point. In most cases this technique diagram analysis of chemically resolved energy-filtered transmission electron microscopy EFTEM images the Cr enrichment is suf- ficiently high as to render the local Co­Cr composition non- magnetic

  13. Thermally Nitrided Stainless Steels for Polymer Electrolyte Membrane Fuel Cell Bipolar Plates: Part 1 Model Ni-50Cr and Austenitic 349TM alloys

    SciTech Connect (OSTI)

    Wang, Heli [National Renewable Energy Laboratory (NREL); Brady, Michael P [ORNL; Turner, John [National Renewable Energy Laboratory (NREL)

    2004-01-01T23:59:59.000Z

    Thermal nitridation of a model Ni-50Cr alloy at 1100 C for 2 h in pure nitrogen resulted in the formation of a continuous, protective CrN/Cr{sub 2}N surface layer with a low interfacial contact resistance. Application of similar nitridation parameters to an austenitic stainless steel, 349{sup TM}, however, resulted in a discontinuous mixture of discrete CrN, Cr{sub 2}N and (Cr,Fe){sub 2}N{sub 1-x} (x = 0--0.5) phase surface particles overlying an exposed {gamma} austenite-based matrix, rather than a continuous nitride surface layer. The interfacial contact resistance of the 349{sup TM} was reduced significantly by the nitridation treatment. However, in the simulated PEMFC environments (1 M H{sub 2}SO{sub 4} + 2 ppm F{sup -} solutions at 70 C sparged with either hydrogen or air), very high corrosion currents were observed under both anodic and cathodic conditions. This poor behavior was linked to the lack of continuity of the Cr-rich nitride surface formed on 349{sup TM} Issues regarding achieving continuous, protective Cr-nitride surface layers on stainless steel alloys are discussed.

  14. Microstructural examination of irradiated V-(4-5%)Cr-(4-5%)Ti.

    SciTech Connect (OSTI)

    Gelles, D. S.

    1998-05-04T23:59:59.000Z

    Microstructural examination results are reported for two heats of V-(4-5%) Cr-(4-5%)Ti irradiated in the EBR-II X530 experiment to 4.5 dpa at {approximately}400 C to provide an understanding of the microstructural evolution that may be associated with degradation of mechanical properties. Fine precipitates were observed in high density intermixed with small defect clusters for all conditions examined following the irradiation. The irradiation-induced precipitation does not appear to be affected by preirradiation heat treatment at 950-1125 C. There was no evidence for a significant density of large (diameter >10 nm) dislocation loops or network dislocations. Analytical investigations successfully demonstrated that the precipitates were enriched in titanium, depleted in vanadium and contained no nitrogen. These results are discussed in terms of future alloy development options.

  15. FURTHER OBSERVATIONS ON V-4Cr-4Ti PRESSURIZED CREEP TUBES

    SciTech Connect (OSTI)

    Gelles, David S.; Kurtz, Richard J.; Toloczko, Mychailo B.; Thomas, Larry E.

    2006-03-01T23:59:59.000Z

    Further observations are provided for pressurized thermal creep tubes of V-4Cr-4Ti examined following testing in the range 650 to 800°C for tests lasting up to ~104 h. Precipitate particles have been analyzed by EELS to define interstitial contents, and are shown to be either C or O rich with only minor N contents. Grain shape aspect ratios as a function of strain have been measured and these data shows shape change as a result of effective mid-wall strains as high as 12.7%. Deformation mechanisms are considered to explain Newtonian viscous flow response at 800°C below effective midwall stresses of 70 MPa, and it is concluded that grain boundary sliding probably is the predominant mechanism based on the microstructural information presented here, but there is evidence that Harper-Dorn creep may also be a contributing creep mechanism under these conditions.

  16. Microstructural examination of irradiated V-(4-5%)Cr-(4-5%)Ti

    SciTech Connect (OSTI)

    Gelles, D.S. [Pacific Northwest National Lab., Richland, WA (United States); Rice, P.M.; Zinkle, S.J. [Oak Ridge National Lab., TN (United States); Chung, H.M. [Argonne National Lab., IL (United States)

    1998-03-01T23:59:59.000Z

    Microstructural examination results are reported for two heats of V-(4-5%)Cr-(4-5%)Ti irradiated in the EBR-II X530 experiment to {approximately}4 dpa at {approximately}400 C to provide an understanding of the microstructural evolution that may be associated with degradation of mechanical properties. Fine precipitates were observed in high density intermixed with small defect clusters for all conditions examined following the irradiation. The irradiation-induced precipitation does not appear to b affected by preirradiation heat treatment at 950--1125 C. There was no evidence for a significant density of large (diameter >10 nm) dislocation loops or network dislocations. Analytical investigators successfully demonstrated that the precipitates were enriched in titanium, depleted in vanadium and contained no nitrogen.

  17. On the origin of the low temperatures resistivity minimum in Cr thin films

    SciTech Connect (OSTI)

    Osquiguil, E.; Tosi, L.; Kaul, E. E.; Balseiro, C. A. [Centro Atómico Bariloche and Instituto Balseiro, Comisión Nacional de Energía Atómica, 8400 Bariloche (Argentina)

    2013-12-28T23:59:59.000Z

    We present measurements of the electrical resistivity and Hall coefficient, ? and R{sub H}, in Cr films of different thicknesses grown on MgO (100) substrates, as a function of temperature T and applied magnetic field H. The results show a low temperature minimum in ?(T), which is thickness dependent. From 40?K to 2?K, the Hall coefficient is a monotonous increasing function as T is reduced with no particular signature at the temperature T{sub min} where the minimum develops. We explain the resistivity minimum assuming an imperfect nesting of the Fermi surface leading to small electron and hole pockets. We introduce a phenomenological model which supports this simple physical picture.

  18. 2011 HONDA CR-Z 2982 - HYBRID ELECTRIC VEHICLE BATTERY TEST RESULTS

    SciTech Connect (OSTI)

    Gray, Tyler [Interek; Shirk, Matthew [Idaho National Laboratory; Wishart, Jeffrey [Interek

    2014-09-01T23:59:59.000Z

    The U.S. Department of Energy’s Advanced Vehicle Testing Activity Program consists of vehicle, battery, and infrastructure testing on advanced technology related to transportation. The activity includes tests on hybrid electric vehicles, including testing traction batteries when both the vehicles and batteries are new and at the conclusion of 160,000 miles of on-road fleet testing. This report documents battery testing performed for the 2011 Honda CR-Z (VIN JHMZF1C64BS002982). Battery testing was performed by Intertek Testing Services NA. The Idaho National Laboratory and Intertek collaborate on the Advanced Vehicle Testing Activity for the Vehicle Technologies Office of the U.S. Department of Energy.

  19. 2011 Honda CR-Z 4466 - Hybrid Electric Vehicle Battery Test Results

    SciTech Connect (OSTI)

    Tyler Gray; Matthew Shirk; Jeffrey Wishart

    2014-09-01T23:59:59.000Z

    The U.S. Department of Energy’s Advanced Vehicle Testing Activity Program consists of vehicle, battery, and infrastructure testing on advanced technology related to transportation. The activity includes tests on hybrid electric vehicles, including testing traction batteries when both the vehicles and batteries are new and at the conclusion of 160,000 miles of on-road fleet testing. This report documents battery testing performed for the 2011 Honda CR-Z (VIN JHMZF1C67BS004466). Battery testing was performed by Intertek Testing Services NA. The Idaho National Laboratory and Intertek collaborate on the Advanced Vehicle Testing Activity for the Vehicle Technologies Office of the U.S. Department of Energy.

  20. Heat treated 9 Cr-1 Mo steel material for high temperature application

    DOE Patents [OSTI]

    Jablonski, Paul D.; Alman, David; Dogan, Omer; Holcomb, Gordon; Cowen, Christopher

    2012-08-21T23:59:59.000Z

    The invention relates to a composition and heat treatment for a high-temperature, titanium alloyed, 9 Cr-1 Mo steel exhibiting improved creep strength and oxidation resistance at service temperatures up to 650.degree. C. The novel combination of composition and heat treatment produces a heat treated material containing both large primary titanium carbides and small secondary titanium carbides. The primary titanium carbides contribute to creep strength while the secondary titanium carbides act to maintain a higher level of chromium in the finished steel for increased oxidation resistance, and strengthen the steel by impeding the movement of dislocations through the crystal structure. The heat treated material provides improved performance at comparable cost to commonly used high-temperature steels such as ASTM P91 and ASTM P92, and requires heat treatment consisting solely of austenization, rapid cooling, tempering, and final cooling, avoiding the need for any hot-working in the austenite temperature range.

  1. Mn-Fe base and Mn-Cr-Fe base austenitic alloys

    DOE Patents [OSTI]

    Brager, Howard R. (Richland, WA); Garner, Francis A. (Richland, WA)

    1987-01-01T23:59:59.000Z

    Manganese-iron base and manganese-chromium-iron base austenitic alloys designed to have resistance to neutron irradiation induced swelling and low activation have the following compositions (in weight percent): 20 to 40 Mn; up to about 15 Cr; about 0.4 to about 3.0 Si; an austenite stabilizing element selected from C and N, alone or in combination with each other, and in an amount effective to substantially stabilize the austenite phase, but less than about 0.7 C, and less than about 0.3 N; up to about 2.5 V; up to about 0.1 P; up to about 0.01 B; up to about 3.0 Al; up to about 0.5 Ni; up to about 2.0 W; up to about 1.0 Ti; up to about 1.0 Ta; and with the remainder of the alloy being essentially iron.

  2. Thermodynamic modeling and experimental validation of the Fe-Al-Ni-Cr-Mo alloy system

    SciTech Connect (OSTI)

    Teng, Zhenke [ORNL; Zhang, F [CompuTherm LLC, Madison, WI; Miller, Michael K [ORNL; Liu, Chain T [Hong Kong Polytechnic University; Huang, Shenyan [ORNL; Chou, Y.T. [Multi-Phase Services Inc., Knoxville; Tien, R [Multi-Phase Services Inc., Knoxville; Chang, Y A [ORNL; Liaw, Peter K [University of Tennessee, Knoxville (UTK)

    2012-01-01T23:59:59.000Z

    NiAl-type precipitate-strengthened ferritic steels have been known as potential materials for the steam turbine applications. In this study, thermodynamic descriptions of the B2-NiAl type nano-scaled precipitates and body-centered-cubic (BCC) Fe matrix phase for four alloys based on the Fe-Al-Ni-Cr-Mo system were developed as a function of the alloy composition at the aging temperature. The calculated phase structure, composition, and volume fraction were validated by the experimental investigations using synchrotron X-ray diffraction and atom probe tomography. With the ability to accurately predict the key microstructural features related to the mechanical properties in a given alloy system, the established thermodynamic model in the current study may significantly accelerate the alloy design process of the NiAl-strengthened ferritic steels.

  3. Microstructural characterization of as-cast biocompatible Co-Cr-Mo alloys

    SciTech Connect (OSTI)

    Giacchi, J.V., E-mail: jgiacchi@exa.unicen.edu.ar [Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Av. Rivadavia 1917, C1033AAJ Buenos Aires (Argentina); Instituto de Fisica de Materiales Tandil (IFIMAT-FCE-CICPBA) Facultad de Ciencias Exactas, Universidad Nacional del Centro de la Provincia de Buenos Aires, Pinto 399 B7000GHG Tandil (Argentina); Morando, C.N.; Fornaro, O. [Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Av. Rivadavia 1917, C1033AAJ Buenos Aires (Argentina); Instituto de Fisica de Materiales Tandil (IFIMAT-FCE-CICPBA) Facultad de Ciencias Exactas, Universidad Nacional del Centro de la Provincia de Buenos Aires, Pinto 399 B7000GHG Tandil (Argentina); Palacio, H.A. [Comision de Investigaciones Cientificas de la Provincia de Buenos Aires (CICPBA), Calle 526 e/10 y 11 B1096APP La Plata (Argentina); Instituto de Fisica de Materiales Tandil (IFIMAT-FCE-CICPBA) Facultad de Ciencias Exactas, Universidad Nacional del Centro de la Provincia de Buenos Aires, Pinto 399 B7000GHG Tandil (Argentina)

    2011-01-15T23:59:59.000Z

    The microstructure of a cobalt-base alloy (Co-Cr-Mo) obtained by the investment casting process was studied. This alloy complies with the ASTM F75 standard and is widely used in the manufacturing of orthopedic implants because of its high strength, good corrosion resistance and excellent biocompatibility properties. This work focuses on the resulting microstructures arising from samples poured under industrial environment conditions, of three different Co-Cr-Mo alloys. For this purpose, we used: 1) an alloy built up from commercial purity constituents, 2) a remelted alloy and 3) a certified alloy for comparison. The characterization of the samples was achieved by using optical microscopy (OM) with a colorant etchant to identify the present phases and scanning electron microscopy (SE-SEM) and energy dispersion spectrometry (EDS) techniques for a better identification. In general the as-cast microstructure is a Co-fcc dendritic matrix with the presence of a secondary phase, such as the M{sub 23}C{sub 6} carbides precipitated at grain boundaries and interdendritic zones. These precipitates are the main strengthening mechanism in this type of alloys. Other minority phases were also reported and their presence could be linked to the cooling rate and the manufacturing process variables and environment. - Research Highlights: {yields}The solidification microstructure of an ASTM-F75 type alloy were studied. {yields}The alloys were poured under an industrial environment. {yields}Carbides and sigma phase identified by color metallography and scanning microscopy (SEM and EDS). {yields}Two carbide morphologies were detected 'blocky type' and 'pearlite type'. {yields}Minority phases were also detected.

  4. Transmission infrared spectra (225 lm) of carbonaceous chondrites (CI, CM, CVCK, CR, C2 ungrouped): Mineralogy, water, and asteroidal

    E-Print Network [OSTI]

    Montes-Hernandez, German

    Transmission infrared spectra (2­25 lm) of carbonaceous chondrites (CI, CM, CV­CK, CR, C2 ungrouped t In this work, infrared transmission spectra (2­25 lm range, 5000­400 cm�1 ) of 40 carbonaceous chon- drites. The variability in the silicate features is correlated with the intensity of an ­OH related absorption at 3-lm

  5. Characterization of Gas Metal Arc Welding welds obtained with new high Cr-Mo ferritic stainless steel filler wires

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Characterization of Gas Metal Arc Welding welds obtained with new high Cr-Mo ferritic stainless Several compositions of metal cored filler wire were manufactured to define the best welding conditions for homogeneous welding, by Gas Metal Arc Welding (GMAW) process, of a modified AISI 444 ferritic stainless steel

  6. Directed-energy electron-beam processing of a hypoeutectic Cr/sub 90/Ta/sub 10/ alloy

    SciTech Connect (OSTI)

    Huang, J.S.; Kaufmann, E.N.

    1987-09-01T23:59:59.000Z

    A hypoeutectic Cr/sub 90/Ta/sub 10/ alloy was processed using a directed-energy electron-beam surface melting and resolidification technique to study its microstructure evolution during rapid solidification. The power of the electron beam was 2500 W and the scan speed ranged from 0.13 to 2.0 m/sec. Microstructure characteristics such as transitions from planar front to dendritic growth, and from cellular to dendritic growth were observed. At low solidification rate, the interdendritic regions are characterized by the Cr/Cr/sub 2/Ta eutectic, and at high solidification rate the intercellular regions are characterized by a Cr/sub 2/Ta phase. For the latter, the distribution of Ta-solute across the interior of a cell is very uniform. In a given sample, the primary cell spacing increases as the solidification front moves from the substrate/regrowth interface toward the surface. The solidification parameters, i.e., temperature gradient and growth velocity, were determined with finite-element heat flow analyses. The observed microstructure characteristics were correlated to these parameters using available theoretical models. 9 refs., 11 figs., 1 tab.

  7. Re-Evaluation of Results in NUREG/CR-6674 for Carbon and Low-Alloy Steel Components (MRP-76)

    SciTech Connect (OSTI)

    A. Deardorff; D. Harris; D. Dedhia

    2002-11-30T23:59:59.000Z

    This report evaluates the conservatisms and uncertainties reported in NUREG/CR-6674 that lead to high probabilities of cracking in carbon and low-alloy steel for reactor piping. The report uses additional data generated since the completion of the report to eliminate uncertainties and show lower probabilities of cracking.

  8. Combined filtered cathodic arc etching pretreatment-magnetron sputter deposition of highly adherent CrN films

    SciTech Connect (OSTI)

    Ehiasarian, A. P.; Anders, A.; Petrov, I. [Materials and Engineering Research Institute, Sheffield Hallam University, Howard St., Sheffield S1 1WB (United Kingdom); Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Frederick Seitz Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801 (United States)

    2007-05-15T23:59:59.000Z

    CrN films were prepared on steel substrates by a hybrid method utilizing filtered cathodic arc for Cr ion pretreatment and magnetron sputtering for coating deposition. During pretreatment the substrates were biased to -1200 V and exposed to filtered chromium plasma. The substrate-coating interface formed during the pretreatment contained a Cr-enriched modified layer with composition that was strongly influenced by the temperature of the substrate as observed by scanning transmission electron microscopy--energy dispersive spectroscopy. The modified layer had a nanocrystalline morphology and thickness of 15 nm. The path of formation of the layer is linked to the combined action of implantation, diffusion, and resputtering. The resulting adhesion of 3 {mu}m thick CrN films was very high with scratch test critical load values of 83 N. The morphology of the films was smooth without large scale defects and the microstructure was columnar. The coatings behaved well in dry sliding tests with very low wear coefficients of 2.3x10{sup -16} m{sup 3} N{sup -1} m{sup -1}, which can be linked to the high adhesion and defect-free microstructure. The smooth coatings also had a high resistance to corrosion as demonstrated by potentiodynamic tests with particularly high pitting potentials of +800 mV.

  9. Sputter-Deposited Pt/CrN Nanoparticle PEM Fuel Cell Cathodes: Limited Proton Conductivity Through Electrode

    E-Print Network [OSTI]

    Gall, Daniel

    Sputter-Deposited Pt/CrN Nanoparticle PEM Fuel Cell Cathodes: Limited Proton Conductivity Through for proton exchange membrane PEM fuel cells. X-ray diffraction and scanning electron microscopy show manuscript received September 17, 2009. Published November 13, 2009. Proton exchange membrane PEM fuel cells

  10. The CR 2.0mm (.079") insulation displacement connector features a mounting height as low as

    E-Print Network [OSTI]

    Wedeward, Kevin

    7 The CR 2.0mm (.079") insulation displacement connector features a mounting height as low as 6.9mm") pitch insulation displacement connector allows automatic harness production for connection of UL1007 of misinsertion without being permanently distorted. · Twin U-slot insulation displacement section The insulation

  11. Modulation of physical and photocatalytic properties of (Cr, N) codoped TiO{sub 2} nanorods using soft solution processing

    SciTech Connect (OSTI)

    Lu, Wen-Chung [Institute of Nanotechnology and Microsystems Engineering, National Cheng Kung University, No. 1, University Road, Tainan City 70101, Taiwan (China); Department of Materials Science and Engineering, National Cheng Kung University, No. 1, University Road, Tainan City 70101, Taiwan (China); Nguyen, Hoang-Diem; Wu, Chun-Yi [Department of Materials Science and Engineering, National Cheng Kung University, No. 1, University Road, Tainan City 70101, Taiwan (China); Chang, Kao-Shuo, E-mail: kschang@mail.ncku.edu.tw; Yoshimura, Masahiro [Department of Materials Science and Engineering, National Cheng Kung University, No. 1, University Road, Tainan City 70101, Taiwan (China); Promotion Center for Global Materials Research (PCGMR), National Cheng Kung University, No. 1, University Road, Tainan City 70101, Taiwan (China)

    2014-04-14T23:59:59.000Z

    Facile polymerized complex reactions together with a hydrothermal reaction were implemented to make single crystalline TiO{sub 2} nanorods for the first time. Chromium (Cr) and nitrogen (N{sub 2}) co-doping was performed to tailor the physical properties. Transmission electron microscopy and x-ray diffraction study illustrated that highly reactive facets of (101), (111), and (001) dominated rutile TiO{sub 2} nanorods. A growth model, based on formation of complex species, was proposed to elucidate effectiveness of the soft solution processing in making TiO{sub 2} nanorods. X-ray photoelectron spectroscopy analysis and consideration of fundamentals of charge neutrality showed N{sub 2} doping could inhibit formation of Cr{sup 6+} and oxygen vacancies (V{sub O}{sup 2+}). An investigation of the photocatalytic properties exhibited high efficiency of photodegradation of methylene blue in 15?min under pH?=?10, using a nanocomposite of (7% Cr, 0.0021% N) codoped and 3% Cr doped TiO{sub 2} nanorods.

  12. Tunable blue light source by intracavity frequency doubling of a Cr-LiSrAIF6 laser

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Tunable blue light source by intracavity frequency doubling of a Cr- LiSrAIF6 laser Franqois-switched operation at 10 kHz was intracavity frequency doubled by using a LiIOl crystal. The 230 ns tunable blue lasers emitting in the blue-green wavelength range are expected to be the key components for optical

  13. Targeting Cancer More Effectively CR@B brings together researchers from across the University and the Royal United Hospital, Bath.

    E-Print Network [OSTI]

    Burton, Geoffrey R.

    Targeting Cancer More Effectively CR@B brings together researchers from across the University to find a cure for various types of cancer. 40 academic groups from nearly every department to bedside and back again. Drug Discovery The discovery of a new family of anti-cancer drugs called steroid

  14. Middle-ear circuit model parameters based on a population of Kevin N. O'Connor and Sunil Puriaa

    E-Print Network [OSTI]

    Allen, Jont

    , Stanford, California 94305, and Palo Alto Veterans Affairs, 3801 Miranda Ave., Palo Alto, California 94304Middle-ear circuit model parameters based on a population of human ears Kevin N. O'Connor and Sunil

  15. Provenance of middle to late Miocene clastic sedimentary rocks in the central to eastern Cibao basin, northern Hispaniola

    E-Print Network [OSTI]

    Yao, Meng

    1997-01-01T23:59:59.000Z

    The provenance of middle to late Miocene clastic sediments of Cibao basin in northern Hispaniola has been assessed via integrated methods including detrital framework modes, clay mineral assemblages and ratios, the composition of individual feldspar...

  16. The Effects of Bilingual Placement and Middle School Transition on the Sense of School Belonging in Hispanic Students

    E-Print Network [OSTI]

    Ney, Emilie A.

    2011-10-21T23:59:59.000Z

    : Chair of Committee, Jan Hughes Committee Members, Jeffrey Liew Blanca Quiroz Victor Willson Head of Department, Victor Willson August 2010 Major Subject: School Psychology iii ABSTRACT The Effects of Bilingual Placement and Middle...

  17. How rise of middle class activism in Indian cities is changing the face of local governance : [case of Delhi

    E-Print Network [OSTI]

    Chakrabarti, Poulomi Dhar

    2007-01-01T23:59:59.000Z

    Neighborhood Associations, called Resident Welfare Associations (RWAs), have assumed an important role in public policy decision making in Delhi as the principal voice of the middle class. This represents a departure from ...

  18. Principals' adoption of abstinence-only-until-marriage education as an innovation in Texas public middle schools

    E-Print Network [OSTI]

    Wilson, Kelly Lynn

    2005-08-29T23:59:59.000Z

    possible moderating effect on other variables. Findings from this study indicated the middle school principal who was most willing to adopt abstinence-only-until-marriage education programs into his or her school??s curriculum strongly believed abstinence...

  19. Kinetics of oxidation of an organic amine with a Cr(V) salen complex in homogeneous aqueous solution and on the surface of mesoporous silica

    SciTech Connect (OSTI)

    Szajna-Fuller, Ewa; Huang, Yulin; Rapp, Jennifer L.; Chaka, Gezhegn; Lin, Victor S.Y.; Pruski, Marek; Bakac, Andreja

    2009-03-09T23:59:59.000Z

    A comparative study of catalytic activity under homogeneous and heterogeneous conditions was carried out using the (salen)Cr{sup III}-catalyzed oxidation of tetramethylbenzidine (TMB) with iodosobenzene as a model reaction. Amine-functionalized mesoporous silica nanoparticles (MSN) were synthesized in a co-condensation reaction and functionalized with salen via a covalent Si-C bond. A Cr(III) complex of this supported ligand, MSN-(salen)Cr{sup III}, was prepared and characterized. Data from powder XRD, BET isotherms and BJH pore size distribution all showed that MSN-(salen)Cr{sup III} still had the typical MSN high surface area, narrow pore size distribution, and ordered hexagonal pore structure, which were further confirmed by transmission electron microscopy (TEM) images. {sup 13}C and {sup 29}Si solid-state NMR data provided structural information about the catalyst and verified successful functionalization of the salen ligand and coordination to Cr(III). No unreacted salen or Cr(III) were observed. The loadings of salen and salen-Cr{sup III} complex were determined via TGA and EDX, respectively. Both measurements indicated that approximately 0.5 mmol/g of catalyst was loaded on the surface of MSN. The oxidation of TMB with iodosobenzene using MSN-(salen)Cr{sup III} as a heterogeneous catalyst exhibited both similarities and differences with the analogous homogeneous reaction using (salen)Cr{sup III}(H{sub 2}O){sup +} as a catalyst in aqueous acetonitrile. In the presence of 0.10 M HClO{sub 4}, the two catalytic reactions proceeded at similar rates and generated the doubly oxidized product TMB{sup 2+}. In the absence of acid, the radical cation TMB{sup +} was produced. The kinetics of the heterogeneous reaction in the absence of added acid responded to concentrations of all three reagents, i.e. (salen)Cr{sup III}, TMB, and PhIO.

  20. Prevalence of exposure to violence and PTSD symptoms in middle income undergraduate students representing three ethnic groups

    E-Print Network [OSTI]

    McGruder, Anita Kay

    1995-01-01T23:59:59.000Z

    PREVALENCE OF EXPOSURE TO VIOLENCE AND PTSD SYMPTOMS IN MIDDLE INCOME UNDERGRADUATE STUDENTS REPRESENTING THREE ETHNIC GROUPS A Thesis by ANITA KAY MCGRUDER Submitted to the Office of Graduate Studies of Texas A&M University in partial... fulfillment of the requirements for the degree of MASTER OF SCIENCE May 1995 Major Subject: Psychology PREVALENCE OF EXPOSURE TO VIOLENCE AND PTSD SYMPTOMS IN MIDDLE INCOME UNDERGRADUATE STUDENTS REPRESENTING THREE ETHNIC GROUPS A Thesis by ANITA KAY...

  1. Sedimentary and faunal analysis of a marginal marine section, the Stone City Member (middle eocene), Crockett Formation, Burleson County, Texas

    E-Print Network [OSTI]

    Nelms, Katherine Currier

    1979-01-01T23:59:59.000Z

    partial fulf1llment of the requirement for the degree of MASTER OF SCIENCE December 1979 Major Subiect: Geology SEDIMENTARY AND FAUNAL ANALYSIS OF A MARGINAL MARINE SECTION, THE STONE CITY MEMBER (MIDDLE EOCENE), CROCKETT FORMATION, BURLESON COUNTY..., TEXAS A Thesis by KATHERINE CURRIER NELMS Approved as to style and content by: Chairman Cemmittek Head of par ment Member Member December 1979 ABSTRACT SEDIMENTARY AND FAUNAL ANALYSIS OF A MARGINAL MARINE SECTION, THE STONE CITY MEMBER (MIDDLE...

  2. Copolymers useful as additives for lowering the cloud point of middle hydrocarbon distillates, and compositions of middle hydrocarbon distillates comprising them

    SciTech Connect (OSTI)

    Durand, J. P.; Damin, B.; Dawans, F.; Leger, R.

    1985-03-05T23:59:59.000Z

    Products useful as additives for lowering the cloud point of middle distillates have a molecular weight from 1,000 to 50,000, and are obtained by reacting a compound of the formula R-Z((CH/sub 2/) /SUB n/ NH) /SUB m/ H or HO-CH/sub 2/-R'-NH/sub 2/ where R is a monovalent saturated aliphatic radical of 1-30 carbon atoms, Z is -NH- or oxygen, n is 2 to 4, m is zero or 1 to 4 and R' is a saturated divalent aliphatic radical of 1-18 carbon atoms, with a copolymer comprising recurrent units (A) from an alkyl ester of an unsaturated monocarboxylic acid and/or a vinyl ester of a saturated monocarboxylic acid, recurrent units (B) from diisobutylene and recurrent units (C) from an unsaturated a,b-dicarboxylic compound.

  3. Impact of x-ray dose on the response of CR-39 to 1-5.5 MeV alphas

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

    Rojas-Herrera, J.; Rinderknecht, H. G.; Zylstra, A. B.; Gatu Johnson, M.; Orozco, D.; Rosenberg, M. J.; Sio, H.; Seguin, F. H.; Frenje, J. A.; Li, C. K.; Petrasso, R. D.

    2015-03-01T23:59:59.000Z

    The CR-39 nuclear track detector is used in many nuclear diagnostics #12;fielded at inertial con#12;nement fusion (ICF) facilities. Large x-ray uences generated by ICF experiments may impact the CR-39 response to incident charged particles. To determine the impact of x-ray exposure on the CR-39 response to alpha particles, a thick-target bremsstrahlung x-ray generator was used to expose CR-39 to various doses of 8 keV Cu-K?#11; and K#12;? x-rays. The CR-39 detectors were then exposed to 1-5.5 MeV alphas from an Am-241 source. The regions of the CR-39 exposed to x-rays showed a smaller track diameter than those not exposed to x-rays: for example, a dose of 3.0#6; ± 0.1 Gy causes a decrease of (19 ± #6;2)% in the track diameter of a 5.5 MeV alpha particle, while a dose of 60.0 ± #6;1.3 Gy results in a decrease of (45 ± #6;5)% in the track diameter. The reduced track diameters were found to be predominantly caused by a comparable reduction in the bulk etch rate of the CR-39 with x-ray dose. A residual eff#11;ect depending on alpha particle energy is characterized using an empirical formula.

  4. Microstructural evolution during solution treatment of Co-Cr-Mo-C biocompatible alloys

    SciTech Connect (OSTI)

    Giacchi, J.V., E-mail: jgiacchi@exa.unicen.edu.ar [IFIMAT, Instituto de Fisica de Materiales Tandil, Facultad de Ciencias Exactas, Universidad Nacional del Centro de la Provincia de Buenos Aires, Pinto 399, B7000GHG Tandil (Argentina); Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Av. Rivadavia 1917, C1033AA, Buenos Aires (Argentina); Fornaro, O. [IFIMAT, Instituto de Fisica de Materiales Tandil, Facultad de Ciencias Exactas, Universidad Nacional del Centro de la Provincia de Buenos Aires, Pinto 399, B7000GHG Tandil (Argentina); Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Av. Rivadavia 1917, C1033AA, Buenos Aires (Argentina); Palacio, H. [IFIMAT, Instituto de Fisica de Materiales Tandil, Facultad de Ciencias Exactas, Universidad Nacional del Centro de la Provincia de Buenos Aires, Pinto 399, B7000GHG Tandil (Argentina); Comision de Investigaciones Cientificas de la Provincia de Buenos Aires (CICPBA), Calle 526 e/10 y 11, B1096APP, La Plata (Argentina)

    2012-06-15T23:59:59.000Z

    Three different Co-Cr-Mo-C alloys conforming to ASTM F75 standard were poured in an industrial environment and subjected to a conventional solution treatment at 1225 Degree-Sign C for several time intervals. The microstructural changes and transformations were studied in each case in order to evaluate the way in which treatment time influences the secondary phase fraction and clarify the microstructural changes that could occur. To assess how treatment time affects microstructure, optical microscopy and image analyzer software, scanning electron microscopy and energy dispersion spectrometry analysis were employed. The main phases detected in the as-cast state were: {sigma}-phase, M{sub 6}C, and M{sub 23}C{sub 6} carbides. The latter presented two different morphologies, blocky type and lamellar type. Despite being considered the most detrimental feature to mechanical properties, {sigma}-phase and lamellar carbides dissolution took place in the early stages of solution treatment. M{sub 23}C{sub 6} carbides featured two different behaviors. In the alloy obtained by melting an appropriate quantity of alloyed commercial materials, a decrease in size, spheroidization and transformation into M{sub 6}C carbides were simultaneously observed. In the commercial ASTM F75 alloy, in turn, despite being the same phase, only a marked decrease in precipitates size was noticed. These different behaviors could be ascribed to the initial presence of other phases in the alloy obtained from alloyed materials, such as {sigma}-phase and 'pearlitic' carbides, or to the initial precipitate size which was much larger in the first than in the commercial ASTM F75 alloy studied. M{sub 6}C carbides dissolved directly in the matrix as they could not be detected in samples solution-treated for 15 min. - Highlights: Black-Right-Pointing-Pointer Three different Co-Cr-Mo alloys were poured under an industrial environment. Black-Right-Pointing-Pointer Transformation of existing phases followed during conventional solution treatment. Black-Right-Pointing-Pointer In as-cast/treated samples, phases were identified by color metallography, SEM and EDS. Black-Right-Pointing-Pointer M{sub 23}C{sub 6} {yields} M{sub 6}C transformation was corroborated by SEM and EDS analysis. Black-Right-Pointing-Pointer Carbide spheroidization was also detected prior a noticeably carbide size decreasing.

  5. Corrosion and Stress Corrosion Cracking of High Cr Ferritic-Martensitic Steels in Supercritical Water

    SciTech Connect (OSTI)

    Jinsung, Jang; Seong Sik, Hwang; Chang Hee, Han; Byung Hak, Lee [Korea Atomic Energy Research Institute, 150 Deokjin-dong, Yuseong-gu, Daejeon, 305-353 (Korea, Republic of)

    2006-07-01T23:59:59.000Z

    Corrosion behavior of the F-M (ferritic-martensitic) steels (T91, T92, T122) and Fe-base ODS (oxide dispersion strengthened) alloy (MA956{sup TM}) were evaluated in an aerated (8 ppm D.O.) SCW (supercritical water) at the temperature range between 300 and 627 deg C under 25 MPa. In aerated SCW the weight change of the F-M steel specimens became greater as the test temperature increased. However, the extent of the weight change at 350 deg C, just below the critical temperature appeared not to be less than those at 550 deg C. And the weight changes of all the F-M steel specimens in the deaerated SCW (for 347 hrs in 100 ppb D.O. for 347 hrs, and in 10 ppb D.O. for 432 hrs) tended to converge to about 1 mgcm{sup -2}. In aerated or deaerated conditions 20Cr Fe-base ODS alloy appeared to be very resistant to a SCW corrosion at all the test temperatures up to 500 hrs. Stress corrosion cracking (SCC) behavior of 9Cr F-M steels (T91 and T92) was investigated by CERT (Constant Extension Rate Test) in SCW at various temperatures and D.O. levels with different strain rates. T91 did not show any evidence of a SCC in a fully deaerated (below 10 ppb D.O.) SCW at 500, 550, and 600 deg C at the test conditions. T92 specimens were tested at 500 deg C in SCW with different D.O. levels. The strain rate did not seem to affect the SCC behavior of the T92 steel, but D.O. in SCW seems to affect the SCC behavior to some extent. The total elongation of T92 in SCW of 100 ppb or of 500 ppb D.O. was significantly smaller than that at a fully deaerated (below 10 ppb D.O.) SCW (about 15 vs. 20%), and it appears to provide a clue to a SCC on the fracture surface after the CERT test. (authors)

  6. Petroleum potential of lower and middle Paleozoic rocks in Nebraska portion of Mid-Continent

    SciTech Connect (OSTI)

    Carlson, M.P. (Univ. of Nebraska, Lincoln (USA))

    1989-08-01T23:59:59.000Z

    Central North America during the Paleozoic was characterized by northern (Williston) and southern (Anadarko) depositional regimes separated by a stable Transcontinental arch. Nebraska lies on the southern flank of this arch and contains the northern zero edges of the lower and middle Paleozoic rocks of the southern regime. Most of these rocks are secondary dolomites with zones of excellent intercrystalline porosity. The Reagan-LaMotte Sandstones and the overlying Arbuckle dolomites are overlapped by Middle Ordovician rocks toward the Transcontinental arch. Rocks equivalent to the Simpson consist of a basal sand (St. Peter) and overlying interbedded gray-green shales and dolomitic limestones. An uppermost shale facies is present in the Upper Ordovician (Viola-Maquoketa) eastward and southward across Nebraska. The dolomite facies extends northward into the Williston basin. The Silurian dolomites, originally more widely deposited, are overlapped by Devonian dolomites in southeastern Nebraska. Upper Devonian rocks exhibit a regional facies change from carbonate to green-gray shale to black shale southeastward across the Mid-Continent. Mississippian carbonates overlap the Devonian westward and northward across the Transcontinental arch. Pennsylvanian uplift and erosion were widespread, producing numerous stratigraphic traps. Sands related to the basal Pennsylvanian unconformity produce along the Cambridge arch. Arbuckle, Simpson, Viola, and Hunton production is present in the Forest City basin and along the Central Kansas uplift. Although source rocks are scarce and the maturation is marginal, current theories of long-distance oil migration encourage exploration in the extensive lower and middle Paleozoic reservoirs in this portion of the Mid-Continent.

  7. Detrital Zircon Geochronology of Middle Ordovician Siliciclastic Sediment on the Southern Laurentian Shelf

    E-Print Network [OSTI]

    Pickell, Michael

    2012-11-20T23:59:59.000Z

    Archean craton of eastern Canada. The Trans-Hudson Orogen represents the suturing of the Superior Province to the Hearne and Wyoming cratons to the north and west between 1.78 Ga and 1.92 Ga (Whitmeyer and Karlstrom, 2007). 1.8-2.0 Ga grains... 1 DETRITAL ZIRCON GEOCHRONOLOGY OF MIDDLE ORDOVICIAN SILICICLASTIC SEDIMENT ON THE SOUTHERN LAURENTIAN SHELF A Thesis by MICHAEL JOHN PICKELL Submitted to the Office of Graduate Studies of Texas A&M University in partial...

  8. Potential Operation and Maintenance (O&M) Savings at the Dunbar Middle and Sims Elementary Schools

    E-Print Network [OSTI]

    Liu, M.; Houcek, J. K.; Claridge, D. E.; Haberl, J. S.

    1993-01-01T23:59:59.000Z

    &M Report, p. 1 POTENTIAL OPERATION AND MAINTENANCE (O&M) SAVINGS AT DUNBAR MIDDLE AND SIMS ELEMENTARY SCHOOL INTRODUCTION O&M savings refers to energy savings due to improved operation and maintenance of building systems. It is expected that the improved... by the remote energy management system at 5 p.m. Clearly, O&M savings can be expected from: (1) turning off lights at night; (2) improving custodial operations; (3) installing motion sensors in auditoriums, gymnasiums, book rooms and activity centers; (4...

  9. North Wilkes Middle and High School Wind Project | 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 Home5b9fcbce19 No revision hasInformation Earth's HeatMexico:Community NominationsCarolina‎ |NAE/Enel NorthMiddle and High

  10. ROOM TEMPERATURE COMPRESSION PROPERTIES OF TWO HEATS OF UNIRRADIATED V-4Cr-4Ti

    SciTech Connect (OSTI)

    Toloczko, Mychailo B.; Kurtz, Richard J.

    2004-06-30T23:59:59.000Z

    Vanadium alloys are of interest to the Fusion program as potential first wall structural materials. The expected irradiation conditions for the first wall structural material include a range of temperatures where very high hardening caused by a high density of small, but shearable defect clusters results in a type of deformation called "localized deformation". At the onset of yield in a tensile test, a dislocation may move through a grain shearing the obstacles and clearing out a channel. Subsequent dislocations may easily pass through this channel. As the test progresses, more channels form. In the early stages of deformation, it is thought that the plastic deformation is confined to these channels. One important macroscopic result of this deformation behavior is rapid onset of necking in a tensile test and very low uniform elongation. As a means to help understand the range of stress states where localized deformation may adversely affect macroscopic ductility in vanadium alloys, compression test specimens fabricated from two heats of V-4Cr-4Ti are currently under irradiation in the High Flux Isotope Reactor (HFIR). The results of room temperature compression tests on the unirradiated control materials are presented here and compared with uniaxial tensile values from the literature.

  11. Effect of heat treatment on precipitation on V-5Cr-5Ti heat BL63

    SciTech Connect (OSTI)

    Gelles, D.S.; Li, H. [Pacific Northwest National Laboratory, Richland, WA (United States)

    1996-04-01T23:59:59.000Z

    The microstructures of V-5Cr-5Ti heat BL63 are compared following heat treatments at 1125{degrees}C for 1 h and 1125{degrees}C for 1 h followed by 890{degrees}C for 24 h. Following the 890{degrees}C treatment, precipitate density was increased due to the presence of a moderate density of highly elongated particles. Microchemical analysis showed that these particles often contained both Ti and V, some particles showed minor amounts of Si, S, and P, but it was also possible to show that these precipitates were enriched in O rather than C or N. Following the 1125{degrees}C heat treatment, only Si was found as a minor impurity in large particles, but S could be identified at grain boundaries, which were coated with a fine distribution of precipitates. The embrittlement observed is ascribed to a combination of interstitial solid solution hardening and grain boundary embrittlement, with interstitial hardening likely the dominant factor.

  12. FURTHER MICROSTRUCTURAL EXAMINATIONS OF V-4Cr-4Ti PRESSURIZED CREEP TUBES

    SciTech Connect (OSTI)

    Gelles, David S.; Kurtz, Richard J.

    2004-06-30T23:59:59.000Z

    Pressurized thermal creep tubes of V-4Cr-4Ti have been examined following testing in the range 650 to 800°C for tests lasting ~104 h. Creep deformation was found to be controlled by climb-controlled dislocation glide at all temperatures below 800°C whereas at 800°C, sub-grain boundary structure predominated and represented the main obstacle for dislocation motion. At 650 and 700°C after ~104 h an increased density of (Ti,V) oxy-carbo-nitride precipitates near the outer surface extending inwards a distance of 30 and 70 µm, respectively, was found. At 800°C, enhanced (Ti,V) oxy-carbo-nitride precipitation was observed across the entire tube wall thickness and may have affected creep response. Also, evidence for internal precipitation associated with the dislocation structure could be identified. The discussion section addresses differences in the controlling creep mechanisms between grain boundary sliding, sub-grain boundary controlled dislocation climb and individual dislocation climb processes.

  13. Spatial fractal characteristic of spinodal decomposition in Fe-Cr-Ni duplex stainless steel

    SciTech Connect (OSTI)

    Shek, C.H.; Wong, K.W.; Lai, J.K.L. [City Univ. of Hong Kong (Hong Kong). Dept. of Physics and Materials Science] [City Univ. of Hong Kong (Hong Kong). Dept. of Physics and Materials Science; Shao, Y.Z. [Zhongshan Univ., Guangzhou (China). Dept. of Physics] [Zhongshan Univ., Guangzhou (China). Dept. of Physics

    1997-08-15T23:59:59.000Z

    Owing to the extensive use of duplex stainless steels in areas like chemical and petrochemical industries, considerable interest has arisen concerning the thermal degradation of these materials during service, and the consequent changes on the mechanical properties. The embrittlement of these steels is basically due to the decomposition of the ferrite phase at elevated temperatures, and duplex steels are seldom used at temperatures above 300 C. Although the microstructure of spinodal decomposition has been studied extensively using atom probe, it is interesting to investigate the development of fractal characteristics in the microstructure during spinodal decomposition. In this paper the authors present part of their recent results in this aspect on a duplex stainless steel. The {alpha} and {alpha}{prime} domains evolved from the primary ferrite phase during spinodal decomposition have different morphologies. The {alpha} (Fe-rich) forms the matrix while the {alpha}{prime} (Cr-rich) domains are developed in the form of discrete regions embedded within the {alpha} matrix. The distribution of these domains follows the fractal-growth characteristics with fractal dimensions ranging from 0.1 to 0.2. In addition, there exists a lower critical dimension beyond which the self-similarity of the domains breaks down.

  14. Application of NUREG/CR-5999 interim fatigue curves to selected nuclear power plant components

    SciTech Connect (OSTI)

    Ware, A.G.; Morton, D.K.; Nitzel, M.E. [Idaho National Engineering Lab., Idaho Falls, ID (United States)

    1995-03-01T23:59:59.000Z

    Recent test data indicate that the effects of the light water reactor (LWR) environment could significantly reduce the fatigue resistance of materials used in the reactor coolant pressure boundary components of operating nuclear power plants. Argonne National Laboratory has developed interim fatigue curves based on test data simulating LWR conditions, and published them in NUREG/CR-5999. In order to assess the significance of these interim fatigue curves, fatigue evaluations of a sample of the components in the reactor coolant pressure boundary of LWRs were performed. The sample consists of components from facilities designed by each of the four U.S. nuclear steam supply system vendors. For each facility, six locations were studied, including two locations on the reactor pressure vessel. In addition, there are older vintage plants where components of the reactor coolant pressure boundary were designed to codes that did not require an explicit fatigue analysis of the components. In order to assess the fatigue resistance of the older vintage plants, an evaluation was also conducted on selected components of three of these plants. This report discusses the insights gained from the application of the interim fatigue curves to components of seven operating nuclear power plants.

  15. Magnetic interactions in CoCrPt-oxide based perpendicular magnetic recording media

    SciTech Connect (OSTI)

    Tan, H. K.; Varghese, B.; Piramanayagam, S. N., E-mail: prem-SN@dsi.a-star.edu.sg [Data Storage Institute, Agency for Science, Technology and Research (A-STAR), Singapore 117608 (Singapore)

    2014-10-28T23:59:59.000Z

    First order reversal curves (FORC) method has been reported to be an efficient tool to study interaction between grains and layers of magnetic materials. Although a few studies have been carried out on perpendicular recording media in the past, a study on the effect of systematic variation of exchange interaction in granular perpendicular magnetic recording media on FORC contours has not been carried out in detail. Such a study will help to understand the use of FORC better. In this paper, we have made a systematic set of samples in order to study the variation in exchange coupling and its effect on FORC contours. The pressure during the deposition of the second ruthenium layer and the magnetic layer was varied to alter the separation between the grains and hence the exchange interaction between the grains in the CoCrPt-oxide recording layer. In addition, the thickness of Co-alloy cap layer was used as an additional tool to control the exchange interaction between the magnetic grains. The results indicated that the interaction field obtained from the FORC does not vary in a significant manner when the changes in exchange interaction are small. In comparison, the peak intensity of the FORC shows a clear trend as the exchange coupling is varied, making it a more suitable parameter to study the exchange and magnetostatic interactions in systems such as magnetic recording media.

  16. High-temperature phase transformation in Cr added TiAl base alloy

    SciTech Connect (OSTI)

    Abe, E.; Niinobe, K.; Nobuki, M.; Nakamura, M.; Tsujimoto, T.

    1999-07-01T23:59:59.000Z

    The authors have investigated a microstructure evolution of a Ti-48Al-3.5Cr (in at.%) alloy at high-temperatures ({gt} 1,473K). In the alloy annealed at 1673K for 1.8ks, followed by air-cooling, a characteristic microstructure with a feathery fashion was uniformly formed. From a cooling-rate-controlling study, it was found that formation of the feathery structure is accomplished during continuous cooling from 1673K to 1573K, within the {alpha} + {gamma} two-phase region. Transmission electron microscopy revealed that the feathery structure is composed of lamellar colonies (5--10{micro}m) which are crystallographically tilted slightly (a few degree) with their neighbors. A surprising fact is that lamellae in each colony are mostly the {gamma} phase with few {alpha}{sub 2} phase less than 5% in volume. This suggests that the feathery structure is a metastable product and has not resulted from the {alpha} {r{underscore}arrow} {alpha} + {gamma} transformation above 1,573 K. Instead, the feathery structure formation should be attributed to the non-equilibrium {alpha} {r{underscore}arrow} {gamma} transformation which occurs at high-temperatures with a small degree of supercooling. The authors discuss this interesting phase transformation in terms of the {alpha} {r{underscore}arrow} {gamma} massive transformation, based on the continuous-cooling-transformation (CCT) diagram constructed for the present alloy.

  17. Star formation in z>1 3CR host galaxies as seen by Herschel

    E-Print Network [OSTI]

    Podigachoski, P; Haas, M; Leipski, C; Wilkes, B; Kuraszkiewicz, J; Westhues, C; Willner, S P; Ashby, M L N; Chini, R; Clements, D L; Fazio, G G; Labiano, A; Lawrence, C; Meisenheimer, K; Peletier, R F; Siebenmorgen, R; Kleijn, G Verdoes

    2015-01-01T23:59:59.000Z

    We present Herschel (PACS and SPIRE) far-infrared (FIR) photometry of a complete sample of z>1 3CR sources, from the Herschel GT project The Herschel Legacy of distant radio-loud AGN (PI: Barthel). Combining these with existing Spitzer photometric data, we perform an infrared (IR) spectral energy distribution (SED) analysis of these landmark objects in extragalactic research to study the star formation in the hosts of some of the brightest active galactic nuclei (AGN) known at any epoch. Accounting for the contribution from an AGN-powered warm dust component to the IR SED, about 40% of our objects undergo episodes of prodigious, ULIRG-strength star formation, with rates of hundreds of solar masses per year, coeval with the growth of the central supermassive black hole. Median SEDs imply that the quasar and radio galaxy hosts have similar FIR properties, in agreement with the orientation-based unification for radio-loud AGN. The star-forming properties of the AGN hosts are similar to those of the general popul...

  18. Phase diagram and magnetocaloric effects in Ni{sub 50}Mn{sub 35}(In{sub 1?x}Cr{sub x}){sub 15} and (Mn{sub 1?x}Cr{sub x})NiGe{sub 1.05} alloys

    SciTech Connect (OSTI)

    Quetz, Abdiel, E-mail: anorve2002@yahoo.com; Muchharla, Baleeswaraiah; Dubenko, Igor; Talapatra, Saikat; Ali, Naushad [Southern Illinois University, Carbondale, Illinois 62901 (United States); Samanta, Tapas; Stadler, Shane [Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803 (United States)

    2014-05-07T23:59:59.000Z

    The magnetocaloric and thermomagnetic properties of Ni{sub 50}Mn{sub 35}(In{sub 1?x}Cr{sub x}){sub 15} and (Mn{sub 1?x}Cr{sub x}) NiGe{sub 1.05} systems for 0???x???0.105 and 0???x???0.1, respectively, have been studied by x-ray diffraction, differential scanning calorimetry, and magnetization measurements. Partial substitution of Cr for Mn in (Mn{sub 1?x}Cr{sub x})NiGe{sub 1.05} results in a first order magnetostructural transition from a hexagonal paramagnetic to an orthorhombic paramagnetic phase near T{sub M}???380?K (for x?=?0.07). Partial substitution of Cr for In in Ni{sub 50}Mn{sub 35}(In{sub 1?x}Cr{sub x}){sub 15} shifts the magnetostructural transition to a higher temperature (T?=?T{sub M}???450?K) for x?=?0.1. Large magnetic entropy changes of ?S?=??12 (J/(kgK)) and ?S?=??11 (J/(kgK)), both for a magnetic field change of 5?T, were observed in the vicinity of T{sub M} for (Mn{sub 1?x}Cr{sub x})NiGe{sub 1.05} and Ni{sub 50}Mn{sub 35}(In{sub 1?x}Cr{sub x}){sub 15}, respectively.

  19. Using CrAIN Multilayer Coatings to Improve Oxidation Resistance of Steel Interconnects for Solid Oxide Fuel Cell Stacks

    SciTech Connect (OSTI)

    Smith, Richard J.; Tripp, C.; Knospe, Anders; Ramana, C. V.; Gorokhovsky, Vladimir I.; Shutthanandan, V.; Gelles, David S.

    2004-06-01T23:59:59.000Z

    The requirements of low cost and high-tempurature corrosion resistance for bipolar interconnect plates in solid oxide fuel cell stacks has directed attention to the use of metal plates with oxidation resistant coatings. We have investigatedt he performance of steel plates with multilayer coatings consisting of CrN for electrical conductivity and CrAIN for oxidation resistance. The coatings were deposited usin large area filterd arc deposition technolgy, and subsequently annealed in air for up to 25 hours at 800 degrees celsius. The composition, structer and morphology of the coated plates were characterized using RBS, nuclear reaction analysis, AFM and TEM techniques. By altering the architecture of the layers within the coatings, the rate of oxidation was reduced by more than an order of magnitute. Electrical resistance was measured at room temperature.

  20. Surface structure and electrochemical characteristics of Ti-V-Cr bcc-type solid solution alloys sintered with Ni

    SciTech Connect (OSTI)

    Tsuji, Yoichiro; Yamamoto, Osamu; Matsuda, Hiromu; Toyoguchi, Yoshinori

    2000-07-01T23:59:59.000Z

    Ti-V-Cr bcc-type solid solution alloys can absorb a large amount of hydrogen and be applied to active materials of the negative electrode in Ni-MH batteries. However, because of the insolubility of Ni into these alloys, the electrochemical characteristics like discharge capacity and cycle life were poor. In order to increase the discharge capacity of hydrogen absorbing alloy electrodes, Ti-V-Cr bcc-type alloy powders were sintered with Ni in order to form Ni contained surface layer on the alloy surface. As sintering temperature rose up, the surface composition changed from TiNi to Ti{sub 2}Ni. TiNi surface layer showed better electrochemical characteristics. For the Ni adding method, Ni electroless plating was preferred because of good adhesion. As a result of optimized conditions, a discharge capacity of 570 mAh/g and an improvement of cycle life were achieved.

  1. Demonstrations of diode-pumped and grating-tuned ZnSe:Cr{sup 2+} lasers. Revision 1

    SciTech Connect (OSTI)

    Page, R.H.; Skidmore, J.A.; Schaffers, K.I.; Beach, R.J.; Payne, S.A.; Krupke, W.F.

    1997-02-14T23:59:59.000Z

    A diode-side-pumped ZnSe:Cr{sup 2+} laser was operated with a 75 - Watt peak power 1.65 {micro}m InGaAsP/InP pump array. The laser was configured with a ``single-bounce`` architecture to maximize its round-trip gain. Peak output powers of {approx}0.3 Watt were obtained with a 10% - transmitting output coupler and a lightly-doped crystal. The estimated ``mode fill`` of {approx}0.06 will increase with Cr{sup 2+} concentration, raising the output power and extraction efficiency. With a grating tuner and MgF{sub 2}:Co{sup 2+} laser pumping, the laser tuned throughout the 2134 - 2799 nm range.

  2. Cr, N-Codoped TiO2 Mesoporous Microspheres for Li-ion Rechargeable Batteries with Enhanced Electrochemical Performance

    SciTech Connect (OSTI)

    Bi, Zhonghe [ORNL] [ORNL; Paranthaman, Mariappan Parans [ORNL] [ORNL; Guo, Bingkun [ORNL] [ORNL; Unocic, Raymond R [ORNL] [ORNL; Meyer III, Harry M [ORNL] [ORNL; Bridges, Craig A [ORNL] [ORNL; Sun, Xiao-Guang [ORNL] [ORNL; Dai, Sheng [ORNL] [ORNL

    2014-01-01T23:59:59.000Z

    Cr,N-codoped TiO2 mesoporous microspheres synthesized using hydrothermal and subsequent nitridation treatment, exhibited higher solubility of nitrogen, and improved electrical conductivity than N-doped TiO2, as anode for Lithium-ion rechargeable batteries, which led to improving charge-discharge capacity at 0.1 C and twice higher rate capability compared to that of nitrogen-doped TiO2 mesoporous microsphere at 10 C

  3. Last update: 3/13/12 SYN COURSE SEC TITLE FAC ROOM TY DAY START END CR PREREQ NOTES

    E-Print Network [OSTI]

    Bogaerts, Steven

    END CR PREREQ NOTES 9524 ENGL 190A 1W Afro-Caribbean Studies Wilkerson HOLL 217 CLS MWF 03:00PM 04 0 Independent Study Staff 1-4 Permission Required 7186 ENGL 290A 1W American Literary Traditions Askeland HOLL 217 CLS MWF 12:40PM 01:40PM 4 ENGL 170, ENGL 180A or ENGL 190A/C 9599 ENGL 380A 1W The Beat

  4. AN UNBIASED SPECTRAL LINE SURVEY TOWARD R CrA IRS7B IN THE 345 GHz WINDOW WITH ASTE

    SciTech Connect (OSTI)

    Watanabe, Yoshimasa; Sakai, Nami; Yamamoto, Satoshi [Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033 (Japan); Lindberg, Johan E.; Bisschop, Suzanne E. [Centre for Star and Planet Formation, Natural History Museum of Denmark, University of Copenhagen, Oster Voldgade 5-7, DK-1350 Copenhagen K. (Denmark); Jorgensen, Jes K. [Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen O. (Denmark)

    2012-02-01T23:59:59.000Z

    We have conducted a spectral line survey in the 332-364 GHz region with the Atacama Submillimeter Telescope Experiment 10 m telescope toward R CrA IRS7B, a low-mass protostar in the Class 0 or Class 0/I transitional stage. We have also performed some supplementary observations in the 450 GHz band. In total, 16 molecular species are identified in the 332-364 GHz region. Strong emission lines of CN and CCH are observed, whereas complex organic molecules and long carbon-chain molecules, which are characteristics of hot corino and warm carbon-chain chemistry (WCCC) source, respectively, are not detected. The rotation temperature of CH{sub 3}OH is evaluated to be 31 K, which is significantly lower than that reported for the prototypical hot corino IRAS 16293-2422 ({approx}85 K). The deuterium fractionation ratios for CCH and H{sub 2}CO are obtained to be 0.038 and 0.050, respectively, which are much lower than those in the hot corino. These results suggest a weak hot corino activity in R CrA IRS7B. On the other hand, the carbon-chain related molecules, CCH and c-C{sub 3}H{sub 2}, are found to be abundant. However, this source cannot be classified as a WCCC source, since long carbon-chain molecules are not detected. If WCCC and hot corino chemistry represent the two extremes in chemical compositions of low-mass Class 0 sources, R CrA IRS7B would be a source with a mixture of these two chemical characteristics. The UV radiation from the nearby Herbig Ae star R CrA may also affect the chemical composition. The present line survey demonstrates further chemical diversity in low-mass star-forming regions.

  5. Need for refining capacity creates opportunities for producers in Middle East

    SciTech Connect (OSTI)

    Ali, M.S.S. (Bahrain National Oil Co., Awali (Bahrain))

    1994-07-11T23:59:59.000Z

    Oil industry interest in refining has revived in the past few years in response to rising oil consumption. The trend creates opportunities, for countries in the Middle East, which do not own refining assets nearly in proportion to their crude oil reserved. By closing this gap between reserves and refining capacity, the countries can ease some of the instability now characteristic of the oil market. Some major oil producing countries have begun to move downstream. During the 1980s, Venezuela, Kuwait, Saudi Arabia, Libya, and other members of the Organization of Petroleum Exporting Countries acquired refining assets through direct total purchase or joint ventures. Nevertheless, the oil industry remains largely unintegrated, with the Middle East holding two thirds of worldwide oil reserves but only a small share downstream. As worldwide refining capacity swings from a period of surplus toward one in which the need for new capacity will be built. The paper discusses background of the situation, shrinking surplus, investment requirements, sources of capital, and shipping concerns.

  6. Anadronous Fish Habitat Enhancement for the Middle Fork and Upper Salmon River, 1988 Annual Report.

    SciTech Connect (OSTI)

    Andrews, John ( US Forest Service, Intermountain Region, Boise, ID)

    1990-01-01T23:59:59.000Z

    The wild and natural salmon and steelhead populations in the Middle Fork and Upper Salmon River are at a critical low. Habitat enhancement through decreasing sediment loads, increasing vegetative cover, removing passage barriers, and providing habitat diversity is imperative to the survival of these specially adapted fish, until passage problems over the Columbia River dams are solved. Personnel from the Boise and Sawtooth National Forests completed all construction work planned for 1988. In Bear Valley, 1573 feet of juniper revetment was constructed at eleven sites, cattle were excluded from 1291 feet of streambanks to prevent bank breakdown, and a small ephemeral gully was filled with juniper trees. Work in the Upper Salmon Drainage consisted of constructing nine rock sills/weirs, two rock deflectors, placing riprap along forty feet of streambank, construction of 2.1 miles of fence on private lands, and opening up the original Valley Creek channel to provide spring chinook passage to the upper watershed. A detailed stream survey of anadromous fish habitat covering 72.0 miles of streams in the Middle Fork Sub-basin was completed.

  7. Study of thermal conversion of naphthenic oils on the basis of analysis of their middle fractions

    SciTech Connect (OSTI)

    Kayukova, G.P.; Kurbskii, G.P.; Mutalapova, R.I. [A.E. Arbuzov Inst. of Organic and Physical Chemistry, Kazan (Russian Federation)] [and others

    1994-05-10T23:59:59.000Z

    The composition of the middle fractions of the thermal decomposition products of naphthenic oils obtained at 300, 350, and 400{degrees}C was studied. It was shown that the character of conversions of petroleum hydrocarbons is governed by the intensity of thermal treatment and by the chemical nature of the starting oil. The removal of aliphatic chains from high-boiling components of the petroleum at a temperature below 350{degrees}C results in the new formation of linear and isoprene alkanes in their middle fractions similarly to the catagenic transformations of oils in deposits. The rise in temperature up to 400{degrees}C enhances the destruction processes related to extension of the reactions of the homolytic cleavage of C-C bonds in aliphatic chains. This results in practically complete destruction of isoprene alkanes and in predominance of low-molecular homologs among the linear alkanes. On the basis of the results obtained it can be supposed that the thermal treatment is an important factor in the conversion of naphthenic oils into paraffin oils. 10 refs., 2 figs., 3 tabs.

  8. Deformation Behavior of Laser Welds in High Temperature Oxidation Resistant Fe-Cr-Al Alloys for Fuel Cladding Applications

    SciTech Connect (OSTI)

    Field, Kevin G [ORNL; Gussev, Maxim N [ORNL; Yamamoto, Yukinori [ORNL; Snead, Lance Lewis [ORNL

    2014-01-01T23:59:59.000Z

    Ferritic-structured Fe-Cr-Al alloys are being developed and show promise as oxidation resistant accident tolerant light water reactor fuel cladding. This study focuses on investigating the weldability of three model alloys in a range of Fe-(13-17.5)Cr-(3-4.4)Al in weight percent with a minor addition of yttrium using laser-welding techniques. A detailed study on the mechanical performance of bead-on-plate welds has been carried out to determine the performance of welds as a function of alloy composition. Laser welding resulted in a defect free weld devoid of cracking or inclusions for all alloys studied. Results indicated a reduction in the yield strength within the fusion zone compared to the base metal. Yield strength reduction was found to be primarily constrained to the fusion zone due to grain coarsening with a less severe reduction in the heat affected zone. No significant correlation was found between the deformation behavior/mechanical performance of welds and the level of Cr or Al in the alloy ranges studied.

  9. High Temperature Thermal Stability and Oxidation Resistance of Magnetron-sputtered Homogeneous CrAlON Coatings on 430 Steel

    SciTech Connect (OSTI)

    Kayani, A.; Wickey, K. J.; Nandasiri, M. I.; Moore, A.; Garratt, E.; AlFaify, S.; Gao, X. [Western Michigan University-Kalamazoo, MI 49008 (United States); Smith, R. J.; Buchanan, T. L.; Priyantha, W.; Kopczyk, M.; Gannon, P. E. [Montana State University-Bozeman, MT 59717 (United States); Gorokhovsky, V. I. [Arcomac Surface Engineering, LLC-Bozeman, MT 59715 (United States)

    2009-03-10T23:59:59.000Z

    The requirements of low cost and high-temperature corrosion resistance for bipolar interconnect plates in solid oxide fuel cell stacks has directed attention to the use of metal plates with oxidation resistant coatings. We have investigated the performance of steel plates with homogenous coatings of CrAlON (oxynitrides). The coatings were deposited using RF magnetron sputtering, with Ar as a sputtering gas. Oxygen in these coatings was not intentionally added. Oxygen might have come through contaminated nitrogen gas bottle, leak in the chamber or from the partial pressure of water vapors. Nitrogen was added during the growth process to get oxynitride coating. The Cr/Al composition ratio in the coatings was varied in a combinatorial approach. The coatings were subsequently annealed in air for up to 25 hours at 800 deg. C. The composition of the coated plates and the rate of oxidation were characterized using Rutherford backscattering (RBS) and nuclear reaction analysis (NRA). From our results, we conclude that Al rich coatings are more susceptible to oxidation than Cr rich coatings.

  10. Formation of Delta Ferrite in 9 Wt Pct Cr Steel Investigated by In-Situ X-Ray Diffraction Using Synchrotron Radiation

    E-Print Network [OSTI]

    Mayr, P.; Palmer, T.A.; Elmer, J.W.; Specht, E.D.; Allen, S.M.

    2010-01-01T23:59:59.000Z

    Formation of Delta Ferrite in 9 Wt Pct Cr Steel Investigatedthe formation of delta ferrite in a martensitic 9 wt pctaustenite, and delta ferrite were measured as a function of

  11. QUEST: QUantum Electron Simulation Toolbox C.-R. Lee1,10 S. Chiesa2, C. N. Varney3,4, E. Khatami3, Z. Bai5,

    E-Print Network [OSTI]

    Bai, Zhaojun

    QUEST: QUantum Electron Simulation Toolbox C.-R. Lee1,10 S. Chiesa2, C. N. Varney3,4, E. Khatami3 use of standing electromagnetic waves causes the atoms to e

  12. A Conceptual model of coupled biogeochemical and hydrogeological processes affected by in situ Cr(VI) bioreduction in groundwater at Hanford 100H Site

    E-Print Network [OSTI]

    2006-01-01T23:59:59.000Z

    in Groundwater at Hanford 100H Site B.Faybishenko, P.E.Long,Cr(VI) contaminated groundwater at Hanford 100H site. A slowHRC TM ), was injected in Hanford sediments to stimulate

  13. Role of microbial exopolymeric substances (EPS) on chromium sorption and transport in heterogeneous subsurface soils: I. Cr(III) complexation with EPS in aqueous solution

    SciTech Connect (OSTI)

    Kantar, C.; Dodge, C.; Demiray, H.; Dogan, N.M.

    2011-01-26T23:59:59.000Z

    Chromium (III) binding by exopolymeric substances (EPS) isolated from Pseudomonas putida P18, Pseudomonas aeruginosa P16 and Pseudomonas stutzeri P40 strains were investigated by the determination of conditional stability constants and the concentration of functional groups using the ion-exchange experiments and potentiometric titrations. Spectroscopic (EXAFS) analysis was also used to obtain information on the nature of Cr(III) binding with EPS functional groups. The data from ion-exchange experiments and potentiometric titrations were evaluated using a non-electrostatic discrete ligand approach. The modeling results show that the acid/base properties of EPSs can be best characterized by invoking four different types of acid functional groups with arbitrarily assigned pK{sub a} values of 4, 6, 8 and 10. The analysis of ion-exchange data using the discrete ligand approach suggests that while the Cr binding by EPS from P. aeruginosa can be successfully described based on a reaction stoichiometry of 1:2 between Cr(III) and HL{sub 2} monoprotic ligands, the accurate description of Cr binding by EPSs extracted from P. putida and P. stutzeri requires postulation of 1:1 Cr(III)-ligand complexes with HL{sub 2} and HL{sub 3} monoprotic ligands, respectively. These results indicate that the carboxyl and/or phosphoric acid sites contribute to Cr(III) binding by microbial EPS, as also confirmed by EXAFS analysis performed in the current study. Overall, this study highlights the need for incorporation of Cr-EPS interactions into transport and speciation models to more accurately assess microbial Cr(VI) reduction and chromium transport in subsurface systems, including microbial reactive treatment barriers.

  14. Role of Microbial Exopolymeric Substances (EPS) on Chromium Sorption and Transport in Heterogeneous Subsurface Soils: I. Cr(III) Complexation with EPS in Aqueous Solution

    SciTech Connect (OSTI)

    C Kantar; H Demiray; N Dogan; C Dodge

    2011-12-31T23:59:59.000Z

    Chromium (III) binding by exopolymeric substances (EPS) isolated from Pseudomonas putida P18, Pseudomonas aeruginosa P16 and Pseudomonas stutzeri P40 strains were investigated by the determination of conditional stability constants and the concentration of functional groups using the ion-exchange experiments and potentiometric titrations. Spectroscopic (EXAFS) analysis was also used to obtain information on the nature of Cr(III) binding with EPS functional groups. The data from ion-exchange experiments and potentiometric titrations were evaluated using a non-electrostatic discrete ligand approach. The modeling results show that the acid/base properties of EPSs can be best characterized by invoking four different types of acid functional groups with arbitrarily assigned pK{sub a} values of 4, 6, 8 and 10. The analysis of ion-exchange data using the discrete ligand approach suggests that while the Cr binding by EPS from P. aeruginosa can be successfully described based on a reaction stoichiometry of 1:2 between Cr(III) and HL{sub 2} monoprotic ligands, the accurate description of Cr binding by EPSs extracted from P. putida and P. stutzeri requires postulation of 1:1 Cr(III)-ligand complexes with HL{sub 2} and HL{sub 3} monoprotic ligands, respectively. These results indicate that the carboxyl and/or phosphoric acid sites contribute to Cr(III) binding by microbial EPS, as also confirmed by EXAFS analysis performed in the current study. Overall, this study highlights the need for incorporation of Cr-EPS interactions into transport and speciation models to more accurately assess microbial Cr(VI) reduction and chromium transport in subsurface systems, including microbial reactive treatment barriers.

  15. X-ray spectroscopic application of Cr/Sc periodic multilayers K. Le Guen, H. Maury, J.-M. Andr, P. Jonnard, A. Hardouin et al.

    E-Print Network [OSTI]

    X-ray spectroscopic application of Cr/Sc periodic multilayers K. Le Guen, H. Maury, J.-M. André, P://apl.aip.org/about/rights_and_permissions #12;X-ray spectroscopic application of Cr/Sc periodic multilayers K. Le Guen,a H. Maury, J.-M. André-Paris 6, UMR-CNRS 7614, 11 rue Pierre et Marie Curie, F-75231 Paris Cedex 05, France A. Hardouin, F

  16. Giant magnetoresistive structures based on CrO{sub 2} with epitaxial RuO{sub 2} as the spacer layer

    SciTech Connect (OSTI)

    Miao, G.X.; Gupta, A.; Sims, H.; Butler, W.H.; Ghosh, S.; Xiao Gang [Physics Department, Brown University, Providence, Rhode Island 02912 (United States); Center for Materials for Information Technology, University of Alabama, Tuscaloosa, Alabama 35487 (United States); Department of Electrical and Computer Engineering, University of Illinois, Chicago, Illinois 60607 (United States); Physics Department, Brown University, Providence, Rhode Island 02912 (United States)

    2005-05-15T23:59:59.000Z

    Epitaxial ruthenium dioxide (RuO{sub 2})/chromium dioxide(CrO{sub 2}) thin film heterostructures have been grown on (100)-TiO{sub 2} substrates by chemical vapor deposition. Both current-in-plane (CIP) and current-perpendicular-to-plane (CPP) giant magnetoresistive stacks were fabricated with either Co or another epitaxial CrO{sub 2} layer as the top electrode. The Cr{sub 2}O{sub 3} barrier, which forms naturally on CrO{sub 2} surfaces, is no longer present after the RuO{sub 2} deposition, resulting in a highly conductive interface that has a resistance at least four orders of magnitude lower. However, only very limited magnetoresistance (MR) was observed. Such low MR is due to the appearance of a chemically and magnetically disordered layer at the CrO{sub 2} and RuO{sub 2} interfaces when Cr{sub 2}O{sub 3} is transformed into rutile structures during its intermixing with RuO{sub 2}.

  17. Investigations of the electronic and magnetic structures of Co{sub 2}YGa (Y=Cr, Mn) Heusler alloys and their (100) surfaces

    SciTech Connect (OSTI)

    Hamad, Bothina, E-mail: b.hamad@ju.edu.jo [Physics Department, The University of Jordan, Amman-11942 (Jordan)

    2014-03-21T23:59:59.000Z

    Density functional theory calculations are performed to investigate the structural, electronic, and magnetic properties of bulk structures of Co{sub 2}YGa (Y?=?Cr, Mn) Heusler alloys and the surfaces along the (100) orientation. The bulk structures of both alloys show a ferromagnetic behavior with total magnetic moments of 3.03?{sub B} and 4.09?{sub B} and high spin polarizations of 99% and 67% for Co{sub 2}CrGa and Co{sub 2}MnGa, respectively. The surfaces are found to exhibit corrugations due to different relaxations of the surface atoms. For the case of Co{sub 2}CrGa, two surfaces preserve the half metallicity, namely those with Cr-Ga and Ga– terminations with high spin polarizations above 90%, whereas it dropped to about 50% for the other surfaces. However, the spin polarizations of Co-Co and Mn-Ga terminated surfaces remain close to that of bulk Co{sub 2}MnGa alloy, whereas it is suppressed down to 17% for Co– termination. The highest local magnetic moments are found to be 3.26??{sub B} and 4.11??{sub B} for Cr and Mn surface atoms in Cr-Ga and Mn– terminated surfaces, respectively.

  18. Strain-Induced Bond Buckling and Its Role in Insulating Properties of Cr-Doped V{sub 2}O{sub 3}

    SciTech Connect (OSTI)

    Frenkel, A. I. [Department of Physics, Yeshiva University, New York, New York 10016 (United States); Pease, D. M.; Budnick, J. I.; Shanthakumar, P.; Huang, T. [Department of Physics, University of Connecticut, Storrs, Connecticut 06269 (United States); Metcalf, P. [Department of Materials Engineering, Purdue University, West Lafayette, Indiana 47907 (United States); Stern, E. A. [Department of Physics, Box 351560, University of Washington, Seattle, Washington 98195 (United States)

    2006-11-10T23:59:59.000Z

    Structural transformations around both V and Cr atoms in (V{sub 1-x}Cr{sub x}){sub 2}O{sub 3} across its metal-insulator transition (MIT) at x{approx}0.01 are studied by extended x-ray absorption fine-structure technique. Our new results for Cr made possible by the use of a novel x-ray analyzer that we developed reveal the substitutional mechanism of Cr doping. We find that this system has a buckled structure with short Cr-V and long V-V bonds. This system of bonds is disordered around the average trigonal lattice ascertained by x-ray diffraction. Such local distortions can result in a long range strain field that sets in around dilute Cr atoms in microscopic regions. We suggest that such locally strained regions should be insulating even at small x. The possibility of local insulating regions within a metallic phase, first suggested by Rice and Brinkman in 1972, remains unaccounted for in modern MIT theories.

  19. Laser welding and post weld treatment of modified 9Cr-1MoVNb steel.

    SciTech Connect (OSTI)

    Xu, Z. (Nuclear Engineering Division)

    2012-04-03T23:59:59.000Z

    Laser welding and post weld laser treatment of modified 9Cr-1MoVNb steels (Grade P91) were performed in this preliminary study to investigate the feasibility of using laser welding process as a potential alternative to arc welding methods for solving the Type IV cracking problem in P91 steel welds. The mechanical and metallurgical testing of the pulsed Nd:YAG laser-welded samples shows the following conclusions: (1) both bead-on-plate and circumferential butt welds made by a pulsed Nd:YAG laser show good welds that are free of microcracks and porosity. The narrow heat affected zone has a homogeneous grain structure without conventional soft hardness zone where the Type IV cracking occurs in conventional arc welds. (2) The laser weld tests also show that the same laser welder has the potential to be used as a multi-function tool for weld surface remelting, glazing or post weld tempering to reduce the weld surface defects and to increase the cracking resistance and toughness of the welds. (3) The Vicker hardness of laser welds in the weld and heat affected zone was 420-500 HV with peak hardness in the HAZ compared to 240 HV of base metal. Post weld laser treatment was able to slightly reduce the peak hardness and smooth the hardness profile, but failed to bring the hardness down to below 300 HV due to insufficient time at temperature and too fast cooling rate after the time. Though optimal hardness of weld made by laser is to be determined for best weld strength, methods to achieve the post weld laser treatment temperature, time at the temperature and slow cooling rate need to be developed. (4) Mechanical testing of the laser weld and post weld laser treated samples need to be performed to evaluate the effects of laser post treatments such as surface remelting, glazing, re-hardening, or tempering on the strength of the welds.

  20. Upgrading of middle distillate fractions of syncrudes from athabasca oil sands

    SciTech Connect (OSTI)

    Wilson, M.F.; Kriz, J.F.

    1983-03-01T23:59:59.000Z

    Middle distillate fractions of syncrudes from Athabasca Oil Sands were evaluated for suitability as feedstocks in the catalytic conversion to diesel fuel meeting cetane number specifications. Hydrogenation of aromatic components to napthenes under severe conditions (380 to 400/sup 0/C, 2500 psig) using sulfided CoO/MoO/sub 3/ and NiO/WO/sub 3/ over ..cap alpha.. . Al/sub 2/O/sub 3/ in a previously described catalyst testing system. Reaction products were analyzed for aromatic carbon content using C/sup 13/ NMR spectroscopy and pseudo first order rate constants and activation energies (15.0 and 14.2 kcal 1 g-mole, respectively) were determined by regression analysis. At optimum conditions 97% aromatic conversion was obtained with the Ni-W catalyst. Product diesel fuel cetane number (42) was within specifications. Co-Mo catalyst was significantly less active.

  1. The Potential Uses of Commercial Satellite Imagery in the Middle East

    SciTech Connect (OSTI)

    Vannoni, M.G.

    1999-06-08T23:59:59.000Z

    It became clear during the workshop that the applicability of commercial satellite imagery to the verification of future regional arms control agreements is limited at this time. Non-traditional security topics such as environmental protection, natural resource management, and the development of infrastructure offer the more promising applications for commercial satellite imagery in the short-term. Many problems and opportunities in these topics are regional, or at least multilateral, in nature. A further advantage is that, unlike arms control and nonproliferation applications, cooperative use of imagery in these topics can be done independently of the formal Middle East Peace Process. The value of commercial satellite imagery to regional arms control and nonproliferation, however, will increase during the next three years as new, more capable satellite systems are launched. Aerial imagery, such as that used in the Open Skies Treaty, can also make significant contributions to both traditional and non-traditional security applications but has the disadvantage of requiring access to national airspace and potentially higher cost. There was general consensus that commercial satellite imagery is under-utilized in the Middle East and resources for remote sensing, both human and institutional, are limited. This relative scarcity, however, provides a natural motivation for collaboration in non-traditional security topics. Collaborations between scientists, businesses, universities, and non-governmental organizations can work at the grass-roots level and yield contributions to confidence building as well as scientific and economic results. Joint analysis projects would benefit the region as well as establish precedents for cooperation.

  2. Use of a dynamic simulation model to understand nitrogen cycling in the middle Rio Grande, NM.

    SciTech Connect (OSTI)

    Meixner, Tom (University of Arizona, Tucson, AZ); Tidwell, Vincent Carroll; Oelsner, Gretchen (University of Arizona, Tucson, AZ); Brooks, Paul (University of Arizona, Tucson, AZ); Roach, Jesse D.

    2008-08-01T23:59:59.000Z

    Water quality often limits the potential uses of scarce water resources in semiarid and arid regions. To best manage water quality one must understand the sources and sinks of both solutes and water to the river system. Nutrient concentration patterns can identify source and sink locations, but cannot always determine biotic processes that affect nutrient concentrations. Modeling tools can provide insight into these large-scale processes. To address questions about large-scale nitrogen removal in the Middle Rio Grande, NM, we created a system dynamics nitrate model using an existing integrated surface water--groundwater model of the region to evaluate our conceptual models of uptake and denitrification as potential nitrate removal mechanisms. We modeled denitrification in groundwater as a first-order process dependent only on concentration and used a 5% denitrification rate. Uptake was assumed to be proportional to transpiration and was modeled as a percentage of the evapotranspiration calculated within the model multiplied by the nitrate concentration in the water being transpired. We modeled riparian uptake as 90% and agricultural uptake as 50% of the respective evapotranspiration rates. Using these removal rates, our model results suggest that riparian uptake, agricultural uptake and denitrification in groundwater are all needed to produce the observed nitrate concentrations in the groundwater, conveyance channels, and river as well as the seasonal concentration patterns. The model results indicate that a total of 497 metric tons of nitrate-N are removed from the Middle Rio Grande annually. Where river nitrate concentrations are low and there are no large nitrate sources, nitrate behaves nearly conservatively and riparian and agricultural uptake are the most important removal mechanisms. Downstream of a large wastewater nitrate source, denitrification and agricultural uptake were responsible for approximately 90% of the nitrogen removal.

  3. Structural and Spectroscopic Characterization of 17- and 18-Electron Piano-Stool Complexes of Chromium. Thermochemical Analyses of Weak Cr-H Bonds

    SciTech Connect (OSTI)

    van der Eide, Edwin F.; Helm, Monte L.; Walter, Eric D.; Bullock, R. Morris

    2013-02-04T23:59:59.000Z

    The 17-electron radical CpCr(CO)2(IMe)• (IMe = 1,3-dimethylimidazol-2-ylidene) was synthesized by the reaction of IMe with [CpCr(CO)3]2, and characterized by single crystal X-ray diffraction and by EPR, IR and variable temperature 1H NMR spectroscopy. The metal-centered radical is monomeric under all conditions and exhibits Curie paramagnetic behavior in solution. An electrochemically reversible reduction to 18-electron CpCr(CO)2(IMe)? takes place at E½ = ?1.89(1) V vs Cp2Fe+•/0 in MeCN, and was accomplished chemically with KC8 in THF. The salts K+(18-crown-6)[CpCr(CO)2(IMe)]? • ½THF and K+[CpCr(CO)2(IMe)]? • ¾THF were crystallographically characterized. Monomeric ion pairs are found in the former, whereas the latter has a polymeric structure due to a network of K???O(CO) interactions. Protonation of K+(18-crown-6)[CpCr(CO)2(IMe)]? • ½THF gives the hydride CpCr(CO)2(IMe)H, which could not be isolated, but was characterized in solution; a pKa of 27.2(4) was determined in MeCN. A thermochemical analysis provides the Cr-H bond dissociation free energy (BDFE) for CpCr(CO)2(IMe)H in MeCN solution as 47.3(6) kcal mol?1. This value is exceptionally low for a transition metal hydride, and implies that the reaction 2 [Cr-H] ? 2 [Cr•] + H2 is exergonic (?G = ?9.0(8) kcal mol?1). This analysis explains the experimental observation that generated solutions of the hydride produce CpCr(CO)2(IMe)• (typically on the timescale of days). By contrast, CpCr(CO)2(PCy3)H has a higher Cr-H BDFE (52.9(4) kcal mol?1), is more stable with respect to H2 loss, and is isolable. We thank the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences and Biosciences for support. M.L.H. carried out the crystallographic studies and was supported as part of the Center for Molecular Electrocatalysis, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences. The EPR studies were performed at the William R. Wiley Environmental Molecular Sciences Laboratory (EMSL), a national scientific user facility sponsored by the Department of Energy’s Office of Biological and Environmental Research located at PNNL. Pacific Northwest National Laboratory is a multiprogram national laboratory operated by Battelle for the U.S. Department of Energy.

  4. Isotope compositions (C, O, Sr, Nd) of vertebrate fossils from the Middle Eocene oil shale of Messel, Germany: Implications for their taphonomy

    E-Print Network [OSTI]

    Schöne, Bernd R.

    Isotope compositions (C, O, Sr, Nd) of vertebrate fossils from the Middle Eocene oil shale isotopes Diagenesis Enamel Messel Propalaeotherium The Middle Eocene oil shale deposits of Messel (~0.706) due to diagenetic Sr uptake from the lake water/oil shale. Enamel 18 Op values (~18 ± 0

  5. Northeastern Geology & Environmental Sciences, v. 30, no. 4, 2008, p. 330-343. STABLE ISOTOPE SIGNATURE OF MIDDLE DEVONIAN SEAWATER FROM HAMILTON

    E-Print Network [OSTI]

    Soja, Constance M.

    SIGNATURE OF MIDDLE DEVONIAN SEAWATER FROM HAMILTON GROUP BRACHIOPODS, CENTRAL NEW YORK STATE Bruce Selleck and Drew Koff Department of Geology, 13 Oak Drive, Colgate University, Hamilton, NY 13346; bselleck the Middle Devonian Hamilton Group of Central New York State. The sample set includes multiple specimens

  6. Isotope compositions (C, O, Sr, Nd) of vertebrate fossils from the Middle Eocene oil shale of Messel, Germany: Implications for their taphonomy

    E-Print Network [OSTI]

    Schöne, Bernd R.

    Isotope compositions (C, O, Sr, Nd) of vertebrate fossils from the Middle Eocene oil shale isotopes Diagenesis Enamel Messel Propalaeotherium The Middle Eocene oil shale deposits of Messel (~0.706) due to diagenetic Sr uptake from the lake water/oil shale. Enamel 18 Op values (~18 ± 0

  7. Impact of different energies of precipitating particles on NOx1 generation in the middle and upper atmosphere during geomagnetic2

    E-Print Network [OSTI]

    Otago, University of

    and energy spectra available today of solar proton events, auroral energy30 electrons, and relativistic1 Impact of different energies of precipitating particles on NOx1 generation in the middle a Sodankylä Geophysical Observatory, Tähteläntie 62, FI-99600 Sodankylä, Finland.8 b Earth Observation

  8. Unintended Consequences: How the U.S.’s Fear of Socialism Affected Policy Decisions in the Middle East

    E-Print Network [OSTI]

    Clary, Rebecca S

    2013-02-04T23:59:59.000Z

    and Amman, Jordan. The retrospective research covers U.S. policy in the Middle East with a focus on Egypt, the leading Arab country at the time, from 1952-1967 to include the ramifications that became manifest after Eisenhower’s term in the White House...

  9. Test-Enhanced Learning in a Middle School Science Classroom: The Effects of Quiz Frequency and Placement

    E-Print Network [OSTI]

    McDermott, Kathleen

    Test-Enhanced Learning in a Middle School Science Classroom: The Effects of Quiz Frequency Typically, teachers use tests to evaluate students' knowledge acquisition. In a novel experimental study, we examined whether low-stakes testing (quizzing) can be used to foster students' learning of course content

  10. Mathematics in the Middle: Enhancing Teachers' Understanding of the Interplay Between "School Math" and Professional Uses of Mathematics

    E-Print Network [OSTI]

    Spagnolo, Filippo

    Mathematics in the Middle: Enhancing Teachers' Understanding of the Interplay Between "School Math" and Professional Uses of Mathematics Barbara Garii, Assistant Professor of Curriculum and Instruction (garii-Oswego Abstract As American society becomes more technologically reliant, applications of mathematics are less

  11. Architecture of the Middle Devonian Kvamshesten Group, western Norway: sedimentary response to deformation above a ramp-flat

    E-Print Network [OSTI]

    Andersen, Torgeir Bjørge

    Architecture of the Middle Devonian Kvamshesten Group, western Norway: sedimentary response. ANDERSEN 1 1Department of Geology, University of Oslo, Pb 1047 Blindern, 0316 Oslo, Norway 2present address." Geological Survey of Norway, 7491 Trondheim, Norway Abstract: The Mid-Devonian Kvamshesten basin in western

  12. Biotic dynamics and carbonate microfacies of the conspicuous Darriwilian (Middle Ordovician) `Tljsten' interval, south-central Sweden

    E-Print Network [OSTI]

    Calner, Mikael

    ) `Täljsten' interval, south-central Sweden Mats E. Eriksson a, , Anders Lindskog a , Mikael Calner of Geology, Lund University, Sölvegatan 12, SE-223 62 Lund, Sweden b School of Earth Sciences, Division Ordovician Kinnekulle Sweden Enclosed in the Darriwilian (Middle Ordovician) part of the reddish

  13. AC 2007-134: MECHANICAL ENGINEERING FOR MIDDLE SCHOOL STUDENTS: AN OVERVIEW OF THE MECHANICAL ENGINEERING PORTION

    E-Print Network [OSTI]

    Rhoads, Jeffrey F.

    AC 2007-134: MECHANICAL ENGINEERING FOR MIDDLE SCHOOL STUDENTS: AN OVERVIEW OF THE MECHANICAL Research and Teaching Assistant in the Department of Mechanical Engineering at Michigan State University. To date, he has taught in the areas of mechanical engineering analysis and mechanical design. Mr. Rhoads

  14. Smith receives top teaching honors in Spartanburg District 2 Christopher Smith '06, band director at Chesnee Middle School and

    E-Print Network [OSTI]

    Smith receives top teaching honors in Spartanburg District 2 Christopher Smith '06, band director Spartanburg School District 2 Teacher of the Year. Smith, initially selected as Chesnee Middle School administrators described Smith as a model teacher who goes far beyond the call of duty. "Chris is extremely

  15. Middle Pliocene Bovidae from Hominid-bearing sites in the Woranso-Mille area, Afar region, Ethiopia

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , Ethiopia Denis Geraads 1* , Stephanie Melillo 2 , & Yohannes Haile-Selassie 3 1 UPR 2147 du CNRS, 44 rue de : Artiodactyla, Bovidae, Middle Pliocene, Ethiopia, eastern Africa halshs-00443584,version1-30Dec2009 Author-Mille (WORMIL) area, about 45km North of Hadar in the lower Awash Valley, Afar region, Ethiopia (Fig.1). Work

  16. Progressive substitution of a subtropical forest for a temperate one during the middle Miocene climate cooling in Central Europe

    E-Print Network [OSTI]

    Jiménez-Moreno, Gonzalo

    . This climatic cooling is correlated with global and regional climatic changes. © 2006 Elsevier B.V. All rights reserved. Keywords: pollen analysis; vegetation; climate; Middle Miocene; Pannonian Basin 1. Introduction Pollen analyses with a botanical background dealing with Miocene sediments from the Paratethys are rare

  17. Precipitation sensitivity to alloy composition in Fe-Cr-Mn austenitic steels developed for reduced activation for fusion application

    SciTech Connect (OSTI)

    Maziasz, P.J.; Klueh, R.L.

    1988-01-01T23:59:59.000Z

    Special austenitic steels are being designed in which alloying elements like Mo, Nb, and Ni are replaced with Mn, W, V, Ti, and/or Ta to reduce the long-term radioactivity induced by fusion reactor irradiation. However, the new steels still need to have properties otherwise similar to commercial steels like type 316. Precipitation strongly affects strength and radiation-resistance in austenitic steels during irradiation at 400--600/degree/C, and precipitation is also usually quite sensitive to alloy composition. The initial stage of development was to define a base Fe-Cr-Mn-C composition that formed stable austenite after annealing and cold-working, and resisted recovery or excessive formation of coarse carbide and intermetallic phases during elevated temperature annealing. These studies produced a Fe-12Cr-20Mn-0.25C base alloy. The next stage was to add the minor alloying elements W, Ti, V, P, and B for more strength and radiation-resistance. One of the goals was to produce fine MC precipitation behavior similar to the Ti-modified Fe-Cr-Ni prime candidate alloy (PCA). Additions of Ti+V+P+B produced fine MC precipitation along network dislocations and recovery/recrystallization resistance in 20% cold worked material aged at 800/degree/C for 166h, whereas W, Ti, W+Ti, or Ti+P+B additions did not. Addition of W+Ti+V+P+B also produced fine MC, but caused some sigma phase formation and more recrystallization as well. 29 refs., 14 figs., 9 tabs.

  18. Prediction and Monitoring Systems of Creep-Fracture Behavior of 9Cr-1Mo Steels for Teactor Pressure Vessels

    SciTech Connect (OSTI)

    Potirniche, Gabriel; Barlow, Fred D.; Charit, Indrajit; Rink, Karl

    2013-11-26T23:59:59.000Z

    A recent workshop on next-generation nuclear plant (NGNP) topics underscored the need for research studies on the creep fracture behavior of two materials under consideration for reactor pressure vessel (RPV) applications: 9Cr-1Mo and SA-5XX steels. This research project will provide a fundamental understanding of creep fracture behavior of modified 9Cr-1Mo steel welds for through modeling and experimentation and will recommend a design for an RPV structural health monitoring system. Following are the specific objectives of this research project: • Characterize metallurgical degradation in welded modified 9Cr-1Mo steel resulting from aging processes and creep service conditions. • Perform creep tests and characterize the mechanisms of creep fracture process. • Quantify how the microstructure degradation controls the creep strength of welded steel specimens. • Perform finite element (FE) simulations using polycrystal plasticity to understand how grain texture affects the creep fracture properties of welds. • Develop a microstructure-based creep fracture model to estimate RPVs service life . • Manufacture small, prototypic, cylindrical pressure vessels, subject them to degradation by aging, and measure their leak rates. • Simulate damage evolution in creep specimens by FE analyses. • Develop a model that correlates gas leak rates from welded pressure vessels with the amount of microstructural damage. • Perform large-scale FE simulations with a realistic microstructure to evaluate RPV performance at elevated temperatures and creep strength. • Develop a fracture model for the structural integrity of RPVs subjected to creep loads. • Develop a plan for a non-destructive structural health monitoring technique and damage detection device for RPVs.

  19. Microstructural examination of V-(3-6%)Cr-(3-5%)Ti irradiated in the ATR-A1 experiment

    SciTech Connect (OSTI)

    Gelles, D.S. [Pacific Northwest National Lab., Richland, WA (United States)

    1998-09-01T23:59:59.000Z

    Microstructural examination results are reported for four heats of V-(3-6%)Cr-(3-5%)Ti irradiated in the ATR-A1 experiment to {approximately}4 dpa at {approximately}200 and 300 C to provide an understanding of the microstructural evolution that may be associated with degradation of mechanical properties. Fine precipitates were observed in high density intermixed with small defect clusters for all conditions examined following the irradiation. The irradiation-induced precipitation does not appear to be affected by preirradiation heat treatment or composition.

  20. Intracavity laser spectroscopy with a semiconductor disk laser-pumped cw Cr{sup 2+} : ZnSe laser

    SciTech Connect (OSTI)

    Kozlovsky, V I; Korostelin, Yu V; Podmar'kov, Yu P; Skasyrsky, Ya K; Frolov, M P [P N Lebedev Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation); Okhotnikov, O G [Optoelectronics Research Center, Tampere University of Technology, Tampere (Finland); Akimov, V A [Moscow Institute of Physics and Technology (State University), Dolgoprudnyi, Moscow Region (Russian Federation)

    2013-09-30T23:59:59.000Z

    Absorption spectra of the air have been measured near 2.31 ?m using intracavity laser spectroscopy with a semiconductor disk laser-pumped cw Cr{sup 2+} : ZnSe laser. It is shown that, at lasing times of at least 3 ms, the sensitivity of the laser to intracavity absorption increases. This allows one to reach an effective path length of 900 km and enables detection of weak lines with absorption coefficients down to 1 × 10{sup -9} cm{sup -1}. (laser spectroscopy)

  1. Application of USNRC NUREG/CR-6661 and draft DG-1108 to evolutionary and advanced reactor designs

    SciTech Connect (OSTI)

    Chang 'Apollo', Chen [Apollo Consulting, Inc., Surprise, AZ 85374-4605 (United States)

    2006-07-01T23:59:59.000Z

    For the seismic design of evolutionary and advanced nuclear reactor power plants, there are definite financial advantages in the application of USNRC NUREG/CR-6661 and draft Regulatory Guide DG-1108. NUREG/CR-6661, 'Benchmark Program for the Evaluation of Methods to Analyze Non-Classically Damped Coupled Systems', was by Brookhaven National Laboratory (BNL) for the USNRC, and Draft Regulatory Guide DG-1108 is the proposed revision to the current Regulatory Guide (RG) 1.92, Revision 1, 'Combining Modal Responses and Spatial Components in Seismic Response Analysis'. The draft Regulatory Guide DG-1108 is available at http://members.cox.net/apolloconsulting, which also provides a link to the USNRC ADAMS site to search for NUREG/CR-6661 in text file or image file. The draft Regulatory Guide DG-1108 removes unnecessary conservatism in the modal combinations for closely spaced modes in seismic response spectrum analysis. Its application will be very helpful in coupled seismic analysis for structures and heavy equipment to reduce seismic responses and in piping system seismic design. In the NUREG/CR-6661 benchmark program, which investigated coupled seismic analysis of structures and equipment or piping systems with different damping values, three of the four participants applied the complex mode solution method to handle different damping values for structures, equipment, and piping systems. The fourth participant applied the classical normal mode method with equivalent weighted damping values to handle differences in structural, equipment, and piping system damping values. Coupled analysis will reduce the equipment responses when equipment, or piping system and structure are in or close to resonance. However, this reduction in responses occurs only if the realistic DG-1108 modal response combination method is applied, because closely spaced modes will be produced when structure and equipment or piping systems are in or close to resonance. Otherwise, the conservatism in the current Regulatory Guide 1.92, Revision 1, will overshadow the advantage of coupled analysis. All four participants applied the realistic modal combination method of DG-1108. Consequently, more realistic and reduced responses were obtained. (authors)

  2. Corrections and additions to the User's Guide for SNAP (NUREG/CR-1245, SAND80-0315). [BSTAT

    SciTech Connect (OSTI)

    Polito, J.

    1982-03-01T23:59:59.000Z

    This document contains corrections and additions to the User's Guide for SNAP (NUREG/CR-1245, SAND80-0315). These update the SNAP report so that it documents the most current version of SNAP. An additional program, BATLE Statistics (BSTAT), is described here. It provides a post-processing capability to analyze engagement data from SNAP simulations. The work documented by this report was performed by Pritsker and Associates, Inc., under contract to Sandia National Laboratories for the US Nuclear Regulatory Commission's Office of Nuclear Regulatory Research and the US Naval Surface Weapons Center.

  3. Last update: 3/22/2011 SYN COURSE SEC TITLE FAC ROOM TY DAY START END CR PREREQ NOTES

    E-Print Network [OSTI]

    Bogaerts, Steven

    201A 1W Inro to Afria and the Diaspora Bailey HOLL 315 CLS MSF 11:30AM 12:30PM 4 1449 AFDS 201C 1W of Chair/Director 1232 ENGL 190A 1W AfroCaribbean Studies Wilkerson HOLL 217 CLS MWF 01:50PM 02:50PM 4 ENGL 06:30PM 09:30PM 4 SYN COURSE SEC TITLE FAC ROOM TY DAY START END CR PREREQ NOTES 4406 ENGL 180A 1W

  4. Microstructural aspects of low-pressure plasma-sprayed CoNiCrAlY coating on Hastelloy X

    SciTech Connect (OSTI)

    Tjong, S.C.; Shih, G.E.; Ho, N.J.

    1989-01-01T23:59:59.000Z

    A Co-32Ni-21Cr-8Al-0.5Y alloy coating plasma sprayed on Hastelloy X. The microstructure of the coating layer consist of ..gamma.. phase solid solution, ..gamma..' phase, and Y-rich intermetallic phase. This coating exhibits excellent oxidation and sulfidation resistance after exposure in air and in sodium sulfate at 1,000/sup 0/C for 60 h, due to the formation of ..cap alpha..-Al/sub 2/O/sub 3/ oxide scale. However, the presence of chloride in the sodium sulfate leads to rupture of the aluminium oxide scale, and this results in the precipitation of chlorides and sulfides within the coating layer.

  5. Electrical spin injection using GaCrN in a GaN based spin light emitting diode

    SciTech Connect (OSTI)

    Banerjee, D.; Ganguly, S.; Saha, D., E-mail: dipankarsaha@iitb.ac.in [Centre of Excellence in Nanoelectronics, Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai 400076 (India); IITB-Monash Research Academy, Indian Institute of Technology Bombay, Mumbai 400076 (India); Adari, R.; Sankaranarayan, S.; Kumar, A. [Centre of Excellence in Nanoelectronics, Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai 400076 (India)] [Centre of Excellence in Nanoelectronics, Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai 400076 (India); Aldhaheri, R. W.; Hussain, M. A.; Balamesh, A. S. [Department of Electrical and Computer Engineering, King Abdulaziz University, Jeddah 21589 (Saudi Arabia)] [Department of Electrical and Computer Engineering, King Abdulaziz University, Jeddah 21589 (Saudi Arabia)

    2013-12-09T23:59:59.000Z

    We have demonstrated electrical spin-injection from GaCrN dilute magnetic semiconductor (DMS) in a GaN-based spin light emitting diode (spin-LED). The remanent in-plane magnetization of the thin-film semiconducting ferromagnet has been used for introducing the spin polarized electrons into the non-magnetic InGaN quantum well. The output circular polarization obtained from the spin-LED closely follows the normalized in-plane magnetization curve of the DMS. A saturation circular polarization of ?2.5% is obtained at 200?K.

  6. Epitaxial Cr on n-SrTiO3(001)&mdash;An ideal Ohmic contact . | EMSL

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsing ZirconiaPolicy and Assistance EnvironmentalEnzymeEnzymeCr on

  7. Fluid diversion and sweep improvement with chemical gels in oil recovery processes. [Four types of gels: resorcinol-formaldehyde; colloidal silica; Cr sup 3+ (chloride)-xanthan; and Cr sup 3+ (acetate)-polyacrylamide

    SciTech Connect (OSTI)

    Seright, R.S.; Martin, F.D.

    1992-09-01T23:59:59.000Z

    The objectives of this project were to identify the mechanisms by which gel treatments divert fluids in reservoirs and to establish where and how gel treatments are best applied. Several different types of gelants were examined, including polymer-based gelants, a monomer-based gelant, and a colloidal-silica gelant. This research was directed at gel applications in water injection wells, in production wells, and in high-pressure gas floods. The work examined how the flow properties of gels and gelling agents are influenced by permeability, lithology, and wettability. Other goals included determining the proper placement of gelants, the stability of in-place gels, and the types of gels required for the various oil recovery processes and for different scales of reservoir heterogeneity. During this three-year project, a number of theoretical analyses were performed to determine where gel treatments are expected to work best and where they are not expected to be effective. The most important, predictions from these analyses are presented. Undoubtedly, some of these predictions will be controversial. However, they do provide a starting point in establishing guidelines for the selection of field candidates for gel treatments. A logical next step is to seek field data that either confirm or contradict these predictions. The experimental work focused on four types of gels: (1) resorcinol-formaldehyde, (2) colloidal silica, (3) Cr{sup 3+}(chloride)-xanthan, and (4) Cr{sup 3+}(acetate)-polyacrylamide. All experiments were performed at 41{degrees}C.

  8. Putative quantum criticality in the (Cr{sub 90}Ir{sub 10}){sub 100?y}V{sub y} alloy system

    SciTech Connect (OSTI)

    Fernando, P. R.; Prinsloo, A. R. E., E-mail: alettap@uj.ac.za; Sheppard, C. J. [Department of Physics, University of Johannesburg, PO Box 524, Auckland Park 2006 (South Africa); Lodya, L. [Sasol Technology, Research and Development, 1 Klasie Havenga Road, Sasolburg 1947 (South Africa)

    2014-05-07T23:59:59.000Z

    Quantum criticality (QC) in spin-density-wave antiferromagnetic Cr and Cr alloy systems is a topic of current interest. In the present study, V was used as a tuning parameter to drive the Néel transition temperature (T{sub N}) of the (Cr{sub 90}Ir{sub 10}){sub 100?y}V{sub y} alloy series with 0???y???14.3 to zero and search for effects of QC in the process. The magnetic properties and possible QC behaviour (QCB) in this alloy system were investigated through electrical resistivity (?), specific heat (C{sub p}), and susceptibility (?) measurements as a function of temperature (T), indicating that T{sub N} is suppressed to zero at a critical concentration y{sub c}???9. The Sommerfeld coefficient (?) is considered a key indicator of QCB and a peak is observed in ?(y) at y{sub c} on decreasing y through this concentration, followed by a sharp decreasing trend. This behaviour is reminiscent of that observed for ? of the prototypical Cr{sub 100?x}V{sub x} QC system and allows for the classification of y{sub c} in the (Cr{sub 90}Ir{sub 10}){sub 100?y}V{sub y} alloy system as a possible QC point.

  9. Report No. 1: Effect of carbon migration in Cr-Mo weldments on metallurgical structure and mechanical properties

    SciTech Connect (OSTI)

    Lundin, C.D.; Khan, K.K.; Yang, D. [Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering

    1995-12-01T23:59:59.000Z

    The occurrence and behavior of a carbon denuded ``soft`` zone in Cr-Mo weldments was studied to determine its influence on mechanical properties and in-service behavior. Room temperature tensile tests, creep rupture tests and Moire interferometry evaluations were performed in order to characterize the behavior of this unique zone in Cr-Mo weldments. The zone is brought about by chromium level differentials between the weld metal and base metal. Extensive metallography was accomplished using OLM, SEM and STEM techniques. The results show that the occurrence of the carbon denuded ``soft`` zone is due to carbon migration, which is driven by elemental differences (especially in chromium) between the weld metal and base metal. The extent of carbon migration depends on the PWHT schedule. Higher strain accumulation and work hardening and/or a constraint effect has been observed in the ``soft`` zone during room temperature testing. However, the work hardening/constraint effect is minimal at elevated temperatures (in the creep regime), hence the ``soft`` zone is a potential failure location in elevated temperature service.

  10. Compatibility of V/Y2O3/V-4Cr-4Ti Coatings with Liquid Flowing Li

    SciTech Connect (OSTI)

    Unocic, Kinga A [ORNL; Leonard, Donovan N [ORNL; Meyer III, Harry M [ORNL; Lance, Michael J [ORNL; Pint, Bruce A [ORNL

    2012-01-01T23:59:59.000Z

    Characterization was performed on two-layer V/Y2O3 coatings deposited on V-4Cr-4Ti and exposed to Li in a thermal convection loop at 400 -700 C for 2,350h. The coatings exposed at lower temperatures ( 504 C) showed adequate electrical resistivity at 500 C in vacuum after exposure and the morphology of the Y2O3 layer was unchanged. XPS and EELS analysis showed no indication of Li penetration to the oxide layer after exposure at 437 C. However, coatings exposed at higher temperatures ( 565 C) showed higher conductivity after exposure and a change in the Y2O3 grain morphology was apparent using TEM. At the highest temperature, a continuous layer of recrystallized oxide grains was observed adjacent to the substrate suggesting that a reaction occurred between Y2O3 and V-4Cr-4Ti rather than Li infiltration. However, no layer formed during a 2,350h anneal at 700 C of an unexposed coating.

  11. Multiferroic CuCrO{sub 2} under high pressure: In situ X-ray diffraction and Raman spectroscopic studies

    SciTech Connect (OSTI)

    Garg, Alka B., E-mail: alkagarg@barc.gov.in; Mishra, A. K.; Pandey, K. K.; Sharma, Surinder M. [High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai 400085 (India)

    2014-10-07T23:59:59.000Z

    The compression behavior of delafossite compound CuCrO{sub 2} has been investigated by in situ x-ray diffraction (XRD) and Raman spectroscopic measurements up to 23.2 and 34?GPa, respectively. X-ray diffraction data show the stability of ambient rhombohedral structure up to ?23?GPa. Material shows large anisotropy in axial compression with c-axis compressibility, ?{sub c}?=?1.26?×?10{sup ?3}(1) GPa{sup ?1} and a-axis compressibility, ?{sub a}?=?8.90?×?10{sup ?3}(6) GPa{sup ?1}. Our XRD data show an irreversible broadening of diffraction peaks. Pressure volume data when fitted to 3rd order Birch-Murnaghan equation of state give the value of bulk modulus, B{sub 0}?=?156.7(2.8) GPa with its pressure derivative, B{sub 0}{sup ?} as 5.3(0.5). All the observed vibrational modes in Raman measurements show hardening with pressure. Appearance of a new mode at ?24?GPa indicates the structural phase transition in the compound. Our XRD and Raman results indicate that CuCrO{sub 2} may be transforming to an ordered rocksalt type structure under compression.

  12. Buildings Success Stories | Department of Energy

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

    May 1, 2014 Tennessee: Bringing Jobs and Economic Development to Piney Flats By tooling up a manufacturing line in Tennessee, where jobs are created, Diversified Power...

  13. Role of Triple Phonon Excitations on Large Angle Quasi-elastic Scattering of {sup 54}Cr+{sup 208}Pb System

    SciTech Connect (OSTI)

    Zamrun, Muhammad F. [Department of Physics, University of Malaya, Kuala Lumpur 50603 (Malaysia); Jurusan Fisika FMIPA, Universitas Haluoleo, Kendari, Sulawesi Tenggara 93232 (Indonesia); Kasim, Hasan Abu [Department of Physics, University of Malaya, Kuala Lumpur 50603 (Malaysia)

    2011-03-30T23:59:59.000Z

    We study the large angle quasi-elastic scattering of {sup 54}Cr+{sup 208}Pb system in terms of the full-order coupled-channels formalism. We especially investigate the role of single, double and triple phonon excitations on quasi-elastic scattering cross section as well as quasi-elastic barrier distribution of this system for which the experimental data have been measured. It is shown that the triple phonon excitations both in {sup 54}Cr and {sup 208}Pb nuclei seem to be needed by the present coupled-channels calculations in order to reproduce the experimental data of quasi-elastic cross section and barrier distribution for the {sup 54}Cr+{sup 208}Pb system. We also show that the standard value of the surface diffuseness parameter for the nuclear potential a = 0.63 fm, is preferred by the experimental quasi-elastic scattering data for this system.

  14. Comparative Study on the Corrosion Resistance of Fe-Based Amorphous Metal, Borated Stainless Steel and Ni-Cr-Mo-Gd Alloy

    SciTech Connect (OSTI)

    Lian, Tiangan; Day, Daniel; Hailey, Phillip; Choi, Jor-Shan; Farmer, Joseph [Lawrence Livermore National Laboratory, Livermore, CA, 94550 (United States)

    2007-07-01T23:59:59.000Z

    Iron-based amorphous alloy Fe{sub 49.7}Cr{sub 17.7}Mn{sub 1.9}Mo{sub 7.4}W{sub 1.6}B{sub 15.2}C{sub 3.8}Si{sub 2.4} was compared to borated stainless steel and Ni-Cr-Mo-Gd alloy on their corrosion resistance in various high-concentration chloride solutions. The melt-spun ribbon of this iron-based amorphous alloy have demonstrated a better corrosion resistance than the bulk borated stainless steel and the bulk Ni-Cr-Mo-Gd alloy, in high-concentration chloride brines at temperatures 90 deg. C or higher. (authors)

  15. A Parallel Controls Software Approach for PEP II: AIDA & Matlab Middle Layer

    SciTech Connect (OSTI)

    Wittmer, W.; Colocho, W.; White, G.; /SLAC

    2007-11-06T23:59:59.000Z

    The controls software in use at PEP II (Stanford Control Program - SCP) had originally been developed in the eighties. It is very successful in routine operation but due to its internal structure it is difficult and time consuming to extend its functionality. This is problematic during machine development and when solving operational issues. Routinely, data has to be exported from the system, analyzed offline, and calculated settings have to be reimported. Since this is a manual process, it is time consuming and error-prone. Setting up automated processes, as is done for MIA (Model Independent Analysis), is also time consuming and specific to each application. Recently, there has been a trend at light sources to use MATLAB as the platform to control accelerators using a 'MATLAB Middle Layer' (MML), and so called channel access (CA) programs to communicate with the low level control system (LLCS). This has proven very successful, especially during machine development time and trouble shooting. A special CA code, named AIDA (Accelerator Independent Data Access), was developed to handle the communication between MATLAB, modern software frameworks, and the SCP. The MML had to be adapted for implementation at PEP II. Colliders differ significantly in their designs compared to light sources, which poses a challenge. PEP II is the first collider at which this implementation is being done. We will report on this effort, which is still ongoing.

  16. Petrophysical characterization of Middle Pliocene Reservoirs, Guneschli Field, Caspian Sea, Azerbaijan

    SciTech Connect (OSTI)

    Adams, C. [Amoco Production Company, Houston, TX (United States); Gousseinov, B. [Socar, Baku (Azerbaijan)

    1995-08-01T23:59:59.000Z

    Guneshli Field is one of several large fields on the Apsheron Ridge, a bathymmic, and structural high, separating the North and South Caspian deeps. In total this trend contains more than 4 billion barrels of oil equivalent. The main reservoir is the Middle Pliocene Productive Series which is interpreted as a series of stacked wave dominated deltas. Reservoirs are fine to very-fine-grained sublitharenites, to feldspathic litharenites with excellent well-connected macro and meso pore systems. Porosity and permeability are texturally controlled due to depositional energy and provenance (as opposed to diagenetically controlled) primarily by grain size, sorting and percent of ductile shale rock fragments. Rarely, carbonate cement partially occludes primary pores. Six main lithofacies were recognized in core and described according to pore throat geometry and flow unit characteristics. Porosity, permeability, and mercury injection capillary pressure data were collected on reservoir and seal rocks. These data were used to define pore throat size distribution, hydrocarbon column height, sealing capacity, and irreducible water saturation for each facies. Porosity and permeability tests on reservoir samples at increasing confining stress conditions show only minor reductions in porosity and permeability. Permeability of poorly consolidated sands, in the absence of conventional plugs, can be estimated from mercury injection data on core chips or cuttings and from grain size data. Reservoir simulation models suggest Guneshli reservoirs have good displacement characteristics and are good waterflood candidates, with recovery being as high as 40% of the original oil-in-place.

  17. LONG-TERM CHANGES IN MERCURY CONCENTRATIONS IN FISH FROM THE MIDDLE SAVANNAH RIVER

    SciTech Connect (OSTI)

    Paller, M; Bill Littrell, B

    2007-01-02T23:59:59.000Z

    Total mercury levels were measured in largemouth bass (Micropterus salmoides), ''sunfishes'' (Lepomis spp)., and ''catfish'' (primarily Ameiurus spp.) from 1971 to 2004 in the middle reaches of the Savannah River, which drains the coastal plain of the southeastern U.S. Mercury levels were highest in 1971 but declined over the next ten years due to the mitigation of point sources of industrial pollution. Mercury levels began to increase in the 1980s as a possible consequence of mercury inputs from tributaries and associated wetlands where mercury concentrations were significantly elevated in water and fish. Mercury levels in Savannah River fish decreased sharply in 2001-2003 coincident with a severe drought in the Savannah River basin, but returned to previous levels in 2004 with the resumption of normal precipitation. Regression models showed that mercury levels in Savannah River fish changed significantly over time and were affected by river discharge. Despite temporal changes, there was little overall difference in Savannah River fish tissue mercury levels between 1971 and 2004.

  18. Fragmentation cross sections of Fe^{26+}, Si^{14+} and C^{6+} ions of 0.3-10 A GeV on polyethylene, CR39 and aluminum targets

    E-Print Network [OSTI]

    Cecchini, S; Giacomelli, G; Giorgini, M; Kumar, A; Mandrioli, G; Manzoor, S; Margiotta, A R; Medinaceli, E; Patrizii, L; Popa, V; Qureshi, I E; Sirri, G; Spurio, M; Togo, V

    2008-01-01T23:59:59.000Z

    We present new measurements of the total and partial fragmentation cross sections in the energy range 0.3-10 A GeV of 56Fe, 28Si and 12C beams on polyethylene, CR39 and aluminum targets. The exposures were made at BNL, USA and HIMAC, Japan. The CR39 nuclear track detectors were used to identify the incident and survived beams and their fragments. The total fragmentation cross sections for all targets are almost energy independent while they depend on the target mass. The measured partial fragmentation cross sections are also discussed.

  19. Fragmentation cross sections of Fe^{26+}, Si^{14+} and C^{6+} ions of 0.3-10 A GeV on CR39, polyethylene and aluminum targets

    E-Print Network [OSTI]

    Miriam Giorgini

    2008-12-01T23:59:59.000Z

    New measurements of the total and partial fragmentation cross sections in the energy range 0.3-10 A GeV of Fe^{26+}, Si^{14+} and C^{6+} beams on polyethylene, CR39 and aluminum targets are presented. The exposures were made at Brookhaven National Laboratory (BNL), USA, and Heavy Ion Medical Accelerator in Chiba (HIMAC), Japan. The CR39 nuclear track detectors were used to identify the incident and survived beams and their fragments. The total fragmentation cross sections for all targets are almost energy independent while they depend on the target mass. The measured partial fragmentation cross sections are also discussed.

  20. Fragmentation cross sections of Fe^{26+}, Si^{14+} and C^{6+} ions of 0.3-10 A GeV on polyethylene, CR39 and aluminum targets

    E-Print Network [OSTI]

    S. Cecchini; T. Chiarusi; G. Giacomelli; M. Giorgini; A. Kumar; G. Mandrioli; S. Manzoor; A. R. Margiotta; E. Medinaceli; L. Patrizii; V. Popa; I. E. Qureshi; G. Sirri; M. Spurio; V. Togo

    2008-01-21T23:59:59.000Z

    We present new measurements of the total and partial fragmentation cross sections in the energy range 0.3-10 A GeV of 56Fe, 28Si and 12C beams on polyethylene, CR39 and aluminum targets. The exposures were made at BNL, USA and HIMAC, Japan. The CR39 nuclear track detectors were used to identify the incident and survived beams and their fragments. The total fragmentation cross sections for all targets are almost energy independent while they depend on the target mass. The measured partial fragmentation cross sections are also discussed.