Sample records for row selected sic

  1. " Row: Selected SIC Codes; Column: Energy Sources;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of12.1. Enclosed9.11.1.1.

  2. " Row: Selected SIC Codes; Column: Energy Sources;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of12.1. Enclosed9.11.1.1.2.

  3. " Row: Selected SIC Codes; Column: Energy Sources;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of12.1. Enclosed9.11.1.1.2.1.

  4. " Row: Selected SIC Codes; Column: Energy Sources;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of12.1.

  5. " Row: Selected SIC Codes; Column: Energy Sources;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of12.1.S4.1. Offsite-Produced

  6. " Row: Selected SIC Codes; Column: Energy Sources;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of12.1.S4.1.

  7. " Row: Selected SIC Codes; Column: Energy Sources and Shipments;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of12.1. Enclosed9.11.1. First

  8. " Row: Selected SIC Codes; Column: Energy Sources and Shipments;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of12.1. Enclosed9.11.1.

  9. IEEE TRANSACTIONS ON ELECTRON DEVICES, VOL. 53, NO. 9, SEPTEMBER 2006 2407 SiGe HBT Without Selectively Implanted Collector (SIC)

    E-Print Network [OSTI]

    Rieh, Jae-Sung

    Selectively Implanted Collector (SIC) Exhibiting fmax = 310 GHz and BVCEO = 2 V Jae-Sung Rieh, Marwan Khater peak fmax of 310 GHz at the collector-current density of 7 mA/m2 and BVCEO of 2 V, are reported behind the speed enhancement has been the continuous vertical scaling of the device structure. Collector

  10. Discontinuous phase formation and selective attack of SiC materials exposed to low oxygen partial pressure environments

    SciTech Connect (OSTI)

    Butt, D.P. [Los Alamos National Lab., NM (United States); Tressler, R.E.; Spear, K.E. [Pennsylvania State Univ., University Park, PA (United States). Dept. of Materials Science and Engineering

    1993-09-01T23:59:59.000Z

    Three SiC materials were exposed to gas mixtures containing N{sub 2}, H{sub 2}, and CO at 1000-1300C, 1-740 torr for a few to 1000 h. Kinetic and thermodynamic studies indicate that CO is the predominant oxidizing species. A variety of corrosion processes were observed, including surface and internal pit formation, needle growth, grain boundary attack, and attack of impurities and surrounding material. In the case of a siliconized SiC, impurities such as Ca, Al, and Fe diffused rapidly through the Si matrix forming complex calcium aluminosilicates on the surface, leaving behind internal voids. Evaluation of the mechanical properties, including fractography, revealed a variety of degradative phenomena. Efforts to identify causes of pit formation suggested that the overall process was complex. Pits formed during attack of grain boundaries and regions containing transition metal impurities. Studies of single crystals showed preferential attack near impurities and crystalline defects, indicating that damaged crystals or certain crystal orientations in the polycrystalline materials are susceptible to attack. In addition, under some conditions where pit formation was observed, the strength of certain materials increased apparently due to flaw healing. It is suggested that flaws can heal in the absence of mechanical stress due to their high surface energy. However, second phases observed within partially healed surface cracks suggest impurities also contribute to the flaw healing processes.

  11. Positive affect increases the breadth of attentional selection G. Rowe, J. B. Hirsh, and A. K. Anderson

    E-Print Network [OSTI]

    Toronto, University of

    to broaden the scope of attentional filters, reducing their selectivity. The effect of positive mood states) sometimes is referred to as ``weapon focus,'' where attention is narrowed at the expense of encoding

  12. Row fault detection system

    DOE Patents [OSTI]

    Archer, Charles Jens (Rochester, MN); Pinnow, Kurt Walter (Rochester, MN); Ratterman, Joseph D. (Rochester, MN); Smith, Brian Edward (Rochester, MN)

    2010-02-23T23:59:59.000Z

    An apparatus and program product check for nodal faults in a row of nodes by causing each node in the row to concurrently communicate with its adjacent neighbor nodes in the row. The communications are analyzed to determine a presence of a faulty node or connection.

  13. Row fault detection system

    DOE Patents [OSTI]

    Archer, Charles Jens (Rochester, MN); Pinnow, Kurt Walter (Rochester, MN); Ratterman, Joseph D. (Rochester, MN); Smith, Brian Edward (Rochester, MN)

    2012-02-07T23:59:59.000Z

    An apparatus, program product and method check for nodal faults in a row of nodes by causing each node in the row to concurrently communicate with its adjacent neighbor nodes in the row. The communications are analyzed to determine a presence of a faulty node or connection.

  14. Katherine Rowe September 29, 2006

    E-Print Network [OSTI]

    Rosemond, Amy Daum

    pavements, namely porous asphalt, porous concrete, and numerous modular paver systems. Both a construction particles allows water to drain through quickly. Porous concrete also consists of an open-graded coarseKatherine Rowe ECOL 8710 September 29, 2006 Short Memo: Aspects & Impacts of Porous Pavements

  15. Cellu-WHAT?-sic: Communicating the Biofuels Message to Local...

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

    Cellu-WHAT?-sic: Communicating the Biofuels Message to Local Stakeholders Cellu-WHAT?-sic: Communicating the Biofuels Message to Local Stakeholders Breakout Session 3D-Building...

  16. Elevated temperature static fatigue of a Nicalon fiber-reinforced SiC composite

    SciTech Connect (OSTI)

    Lin, H.T.; Becher, P.F.; Tortorelli, P.F. [Oak Ridge National Lab., TN (United States). Metals and Ceramics Div.

    1994-12-31T23:59:59.000Z

    Static fatigue tests of a Nicalon fiber-reinforced SiC matrix composite were conducted in four-point bending over a temperature range of 425 to 1,150 C in air at selected stress levels. The composite consisted of a Nicalon cloth with a 0.3 {mu}m graphite interfacial coating and a Forced Chemical Vapor Infiltration (FCVI) SiC matrix composite; samples were tested with or without a final protective SiC seal coat. The results indicated that the fatigue life of the Nicalon-SiC composite decreased with an increase in either applied stresses or test temperatures. However, the composite exhibited a fatigue limit of {approximately} 100 MPa at temperatures < 950 C which decreased to {approximately} 70 MPa at 1,150 C. Both electron microscopy and thermogravimetric studies suggested that the lifetime of the composites was dictated by the oxidation of graphite interfacial layer at temperatures {le} 700 C and by oxidation of graphite coating accompanied by formation of silicate interfacial layer via oxidation of the Nicalon fiber (and the SiC matrix) at temperatures {ge} 950 C. Use of a SiC seal coat effectively retarded the oxidation reactions and increased the lifetime by at least one order of magnitude at 425 C. On the other hand, the SiC seal coat made little (if any) difference in fatigue life at 950 C.

  17. Stability of tube rows in crossflow. [LMFBR

    SciTech Connect (OSTI)

    Chen, S.S.; Jendrzejczyk, J.A.

    1982-10-01T23:59:59.000Z

    A mathematical model for the instability of tube rows subjected to crossflow is examined. The theoretical model, based on the fluid-force data for a pitch-to-diameter ratio of 1.33, provides additional insight into the instability phenomenon. Tests are also conducted for three sets of tube rows. The effects of mass ratio, tube pitch, damping, detuning and finned tubes are investigated. Theoretical results and experimental data are in good agreement.

  18. sics-logo kth-logo Real issues within IP voice communication

    E-Print Network [OSTI]

    sics-logo kth-logo Real issues within IP voice communication (with short SICS intro) Ian Marsh FEUP, February 2009 Ian Marsh Real issues within IP voice communication (with short SICS int #12;sics-logo kth-logo About SICS Ian Marsh Real issues within IP voice communication (with short SICS int #12;sics-logo kth-logo

  19. Plasma Chemistries for High Density Plasma Etching of SiC

    SciTech Connect (OSTI)

    Cho, H.; Hahn, Y.B.; Hays, D.A.; Hong, J.; Jung, K.B.; Lester, L.F.; Ostling, M.; Pearton, S.J.; Shul, R.J.; Zetterling, C.-M; Zhang, L.

    1998-11-10T23:59:59.000Z

    A variety of different plasma chemistries, including SF6, Cl2, IC1 and IBr, have been examined for dry etching of 6H-SiC in high ion density plasma tools (Inductively Coupled Plasma and Electron Cyclotron Resonance). Rates up to 4,500~"min-1 were obtained for SF6 plasmas, while much lower rates (S800~.min-') were achieved with Cl2, ICl and IBr. The F2- based chemistries have poor selectivity for SiC over photoresist masks (typically 0.4-0.5), but Ni masks are more robust, and allow etch depths 210pm in the SiC. A micromachining process (sequential etch/deposition (<2,000Angstrom min-1) for SiC steps) designed for Si produces relatively low etch rates.

  20. Effects of various inefficiencies in rowing on shell speed

    E-Print Network [OSTI]

    Young, Stephen F., Jr

    2009-01-01T23:59:59.000Z

    First order predictions were made in determining the effects of various sources of inefficiency in rowing on shell speed. These predictions were then tested using a MATLAB model of the rowing stroke. The model simulates ...

  1. Microwave joining of SiC

    SciTech Connect (OSTI)

    Silberglitt, R.; Ahmad, I.; Tian, Y.L. [FM Technologies, Inc., Fairfax, VA (United States)] [and others

    1997-04-01T23:59:59.000Z

    The purpose of this work is to optimize the properties of SiC-SiC joints made using microwave energy. The current focus is on identification of the most effective joining methods for scale-up to large tube assemblies, including joining using SiC produced in situ from chemical precursors. During FY 1996, a new microwave applicator was designed, fabricated and tested that provides the capability for vacuum baking of the specimens and insulation and for processing under inert environment. This applicator was used to join continuous fiber-reinforced (CFCC) SiC/SiC composites using a polymer precursor to form a SiC interlayer in situ.

  2. Propulsive Efficiency of Rowing Oars David S. Cabrera1

    E-Print Network [OSTI]

    Ruina, Andy L.

    Propulsive Efficiency of Rowing Oars David S. Cabrera1 Andy L. Ruina2 Department of Theoretical Is the common folklore, that oars are less efficient at propulsion than propellers, correct? Here we examine the propulsive efficiency of the oars used in competitive rowing. We take the propulsive efficiency of rowing

  3. CSLC ROW Forms | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:EzfeedflagBiomassSustainableCSL Gas Recovery Biomass Facility Jump to:ROW Forms Jump to:

  4. Nanocrystalline SiC and Ti3SiC2 Alloys for Reactor Materials: Diffusion of Fission Product Surrogates

    SciTech Connect (OSTI)

    Henager, Charles H.; Jiang, Weilin

    2014-11-01T23:59:59.000Z

    MAX phases, such as titanium silicon carbide (Ti3SiC2), have a unique combination of both metallic and ceramic properties, which make them attractive for potential nuclear applications. Ti3SiC2 has been suggested in the literature as a possible fuel cladding material. Prior to the application, it is necessary to investigate diffusivities of fission products in the ternary compound at elevated temperatures. This study attempts to obtain relevant data and make an initial assessment for Ti3SiC2. Ion implantation was used to introduce fission product surrogates (Ag and Cs) and a noble metal (Au) in Ti3SiC2, SiC, and a dual-phase nanocomposite of Ti3SiC2/SiC synthesized at PNNL. Thermal annealing and in-situ Rutherford backscattering spectrometry (RBS) were employed to study the diffusivity of the various implanted species in the materials. In-situ RBS study of Ti3SiC2 implanted with Au ions at various temperatures was also performed. The experimental results indicate that the implanted Ag in SiC is immobile up to the highest temperature (1273 K) applied in this study; in contrast, significant out-diffusion of both Ag and Au in MAX phase Ti3SiC2 occurs during ion implantation at 873 K. Cs in Ti3SiC2 is found to diffuse during post-irradiation annealing at 973 K, and noticeable Cs release from the sample is observed. This study may suggest caution in using Ti3SiC2 as a fuel cladding material for advanced nuclear reactors operating at very high temperatures. Further studies of the related materials are recommended.

  5. Atomic-Level Computer Simulation of SiC: Defect Accumulation...

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

    Atomic-Level Computer Simulation of SiC: Defect Accumulation, Mechanical Properties and Defect Recovery. Atomic-Level Computer Simulation of SiC: Defect Accumulation, Mechanical...

  6. Homogenisation of a Row of Dislocation Dipoles

    E-Print Network [OSTI]

    Stephen Jonathan Chapman; Yang Xiang; Yichao Zhu

    2015-04-27T23:59:59.000Z

    Conventional discrete-to-continuum approaches have seen their limitation in describing the collective behaviour of the multi-polar configurations of dislocations, which are widely observed in crystalline materials. The reason is that dislocation dipoles, which play an important role in determining the mechanical properties of crystals, often get smeared out when traditional homogenisation methods are applied. To address such difficulties, the collective behaviour of a row of dislocation dipoles is studied by using matched asymptotic techniques. The discrete-to-continuum transition is facilitated by introducing two field variables respectively describing the dislocation pair density potential and the dislocation pair width. It is found that the dislocation pair width evolves much faster than the pair density. Such hierarchy in evolution time scales enables us to describe the dislocation dynamics at the coarse-grained level by an evolution equation for the slowly varying variable (the pair density) coupled with an equilibrium equation for the fast varying variable (the pair width). The time-scale separation method adopted here paves a way for properly incorporating dipole-like (zero net Burgers vector but non-vanishing) dislocation structures, known as the statistically stored dislocations (SSDs) into macroscopic models of crystal plasticity in three dimensions. Moreover, the natural transition between different equilibrium patterns found here may also shed light on understanding the emergence of the persistent slip bands (PSBs) in fatigue metals induced by cyclic loads.

  7. Health hazard evaluation report HETA 96-0137-2607, Yankee Atomic Electric Company, Rowe, Massachusetts

    SciTech Connect (OSTI)

    Sylvain, D.C.

    1996-10-01T23:59:59.000Z

    In response to a request from the Health and Safety Supervisor at the Yankee Nuclear Power Station (SIC-4911), Rowe, Massachusetts, an investigation was begun into ozone (10028156) exposure during plasma arc cutting and welding. Welders had reported chest tightness, dry cough, and throat and bronchial irritation. The nuclear power station was in the process of being decommissioned, and workers were dismantling components using welding and cutting methods. Of the operations observed during the site visit, the highest ozone concentrations were generated during plasma arc cutting, followed by metal inert gas (MIG) welding and arc welding. During plasma arc cutting the average and peak concentrations exceeded the NIOSH ceiling recommended exposure limit of 0.1 part per million. The author concludes that ozone exposure during plasma arc cutting and MIG welding presented a health hazard to welders. The author recommends that improvements be made in the local exhaust ventilation, that nitrogen-dioxide levels be monitored during hot work, and that many exposed workers wear protective clothing, use ultraviolet blocking lotion, and continue the use appropriate shade of eye protection.

  8. Optimization of row spacing and nitrogen fertilization for cotton

    E-Print Network [OSTI]

    Clawson, Ernest Leslie

    2004-09-30T23:59:59.000Z

    rows. One recommendation is to achieve between 247,100 to 395,360 plants per hectare for UNR cotton (BASF Corporation, 1999). In conventional cotton 74,176 to 123,550 plants per hectare has been recommended in California (Hake et al., 1996a... recommendation, not directed toward a particular state, is 247,097 to 395,355 plants ha-1 (BASF, 1999). The 76-cm row spacing plant population means in this study fell within the recommendations for conventional rows, and the 19-cm means were within...

  9. ECG-edit function in multidetector-row computed tomography coronary arteriography for patients with arrhythmias.

    E-Print Network [OSTI]

    2008-01-01T23:59:59.000Z

    multi- detector row computed tomography for the evaluationwith multislice computed tomography. J Am Coll Cardiol 2001;multi- detector-row computed tomography: Results in 102

  10. Modeling of C stars with core/mantle grains: Amorphous carbon + SiC

    E-Print Network [OSTI]

    S. Lorenz-Martins; F. X. de Araujo; S. J. Codina Landaberry; W. G. de Almeida; R. V. de Nader

    2000-12-08T23:59:59.000Z

    A set of 45 dust envelopes of carbon stars has been modeled. Among them, 34 were selected according to their dust envelope class (as suggested by Sloan, Little-Marenin & Price, 1998) and 11 are extreme carbon stars. The models were performed using a code that describes the radiative transfer in dust envelopes considering core/mantle grains composed by an alpha-SiC core and an amorphous carbon (A.C.) mantle. In addition, we have also computed models with a code that considers two kinds of grains - alpha-SiC and A.C. - simultaneously. Core-mantle grains seem to fit dust envelopes of evolved carbon stars, while two homogeneous grains are more able to reproduce thinner dust envelopes. Our results suggest that there exists an evolution of dust grains in the carbon star sequence. In the beginning of the sequence, grains are mainly composed of SiC and amorphous carbon; with dust envelope evolution, carbon grains are coated in SiC. This phenomena could perhaps explain the small quantity of SiC grains observed in the interstellar medium. However, in this work we consider only alpha-SiC grains, and the inclusion of beta-SiC grains can perhaps change some of there results.

  11. Compatibility of SiC and SiC Composites with Molten Lead

    SciTech Connect (OSTI)

    H Tunison

    2006-03-07T23:59:59.000Z

    The choice of structural material candidates to contain Lead at 1000 C are limited in number. Silicon carbide composites comprise one choice of possible containment materials. Short term screening studies (120 hours) were undertaken to study the behavior of Silicon Carbide, Silicon Nitride, elemental Silicon and various Silicon Carbide fiber composites focusing mainly on melt infiltrated composites. Isothermal experiments at 1000 C utilized graphite fixtures to contain the Lead and material specimens under a low oxygen partial pressure environment. The corrosion weight loss values (grams/cm{sup 2} Hr) obtained for each of the pure materials showed SiC (monolithic CVD or Hexoloy) to have the best materials compatibility with Lead at this temperature. Increased weight loss values were observed for pure Silicon Nitride and elemental Silicon. For the SiC fiber composite samples those prepared using a SiC matrix material performed better than Si{sub 3}N{sub 4} as a matrix material. Composites prepared using a silicon melt infiltration process showed larger corrosion weight loss values due to the solubility of silicon in lead at these temperatures. When excess silicon was removed from these composite samples the corrosion performance for these material improved. These screening studies were used to guide future long term exposure (both isothermal and non-isothermal) experiments and Silicon Carbide composite fabrication work.

  12. Optimization Online - Simultaneous Column-and-Row Generation ...

    E-Print Network [OSTI]

    Ibrahim Muter

    2010-11-14T23:59:59.000Z

    Nov 14, 2010 ... Abstract: In this paper, we develop a simultaneous column-and-row generation algorithm that could be applied to a general class of large-scale...

  13. Roswell International Air Center Airport (ROW) Pavement Condition and Analysis

    E-Print Network [OSTI]

    Cal, Mark P.

    Roswell International Air Center Airport (ROW) Pavement Condition and Analysis Submitted to: Jane M in December, 2009 18 .......................................4. Predicted Pavement Conditions Assuming No Maintenance 18 ...............Table 5. Predicted Pavement Conditions (PCI) Assuming no Maintenance After 2010

  14. amorphous sic coatings: Topics by E-print Network

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

    and analysis of lateral SiC N-emitter SiGe P-base Schottky metal-collector (NPM) HBT on SOI Engineering Websites Summary: on SOI M. Jagadesh Kumar *, C. Linga Reddy...

  15. archaea ecology sic: Topics by E-print Network

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

    and analysis of lateral SiC N-emitter SiGe P-base Schottky metal-collector (NPM) HBT on SOI Engineering Websites Summary: on SOI M. Jagadesh Kumar *, C. Linga Reddy...

  16. advanced polycrystalline sic: Topics by E-print Network

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

    and analysis of lateral SiC N-emitter SiGe P-base Schottky metal-collector (NPM) HBT on SOI Engineering Websites Summary: on SOI M. Jagadesh Kumar *, C. Linga Reddy...

  17. Sic et non en el Libro de buen amor

    E-Print Network [OSTI]

    Hinton, Melvin

    1999-01-01T23:59:59.000Z

    This thesis studies the concept of sic et non (the paradox of systematically acting in a way which contradicts one's beliefs or of simultaneously holding two contradictory beliefs) in the LBA and its cultural milieu, ...

  18. Microwave joining of SiC ceramics and composites

    SciTech Connect (OSTI)

    Ahmad, I.; Silberglitt, R.; Tian, Y.L. [FM Technologies, Inc., Fairfax, VA (United States); Katz, J.D. [Los Alamos National Lab., NM (United States)

    1997-04-01T23:59:59.000Z

    Potential applications of SiC include components for advanced turbine engines, tube assemblies for radiant burners and petrochemical processing and heat exchangers for high efficiency electric power generation systems. Reliable methods for joining SiC are required in order to cost-effectively fabricate components for these applications from commercially available shapes and sizes. This manuscript reports the results of microwave joining experiments performed using two different types of SiC materials. The first were on reaction bonded SiC, and produced joints with fracture toughness equal to or greater than that of the base material over an extended range of joining temperatures. The second were on continuous fiber-reinforced SiC/SiC composite materials, which were successfully joined with a commercial active brazing alloy, as well as by using a polymer precursor.

  19. Sport Scholarship programme Rowing at Birmingham

    E-Print Network [OSTI]

    Heinke, Dietmar

    included Silver at the World Cup in Linz 2007; 5th at the World Cup in Amsterdam 2007; 4th at Lucerne 2007, winning gold in Bled, silver in Munich and bronze in Lucerne. She has already been selected for the women

  20. Annealing Simulations of Nano-Sized Amorphous Structures in SiC...

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

    Simulations of Nano-Sized Amorphous Structures in SiC. Annealing Simulations of Nano-Sized Amorphous Structures in SiC. Abstract: A two-dimensional model of a nano-sized amorphous...

  1. Hollow Core-Shell Structured Porous Si-C Nanocomposites for Li...

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

    Hollow Core-Shell Structured Porous Si-C Nanocomposites for Li-Ion Battery Anodes. Hollow Core-Shell Structured Porous Si-C Nanocomposites for Li-Ion Battery Anodes. Abstract:...

  2. Damage Profiles and Ion Distribution in Pt-irradiated SiC. |...

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

    Damage Profiles and Ion Distribution in Pt-irradiated SiC. Damage Profiles and Ion Distribution in Pt-irradiated SiC. Abstract: Single crystalline 6H-SiC samples were irradiated at...

  3. Over-Current Protection Scheme for SiC Power MOSFET DC Circuit Breaker

    E-Print Network [OSTI]

    Zhang, Yuan; Liang, Yung C.

    2015-01-01T23:59:59.000Z

    V. Radun, SiC based solid state power controller, in 23tha solid-state circuit breaker based on SiC power MOSFET withSolid-state DC circuit breakers made of the modern wide bandgap power

  4. Nanocrystalline SiC and Ti3SiC2 Alloys for Reactor Materials: Thermal and Mechanical Properties

    SciTech Connect (OSTI)

    Henager, Charles H.; Alvine, Kyle J.; Roosendaal, Timothy J.; Shin, Yongsoon; Nguyen, Ba Nghiep; Borlaug, Brennan A.; Jiang, Weilin

    2014-04-01T23:59:59.000Z

    SiC-polymers (pure polycarbosilane and polycarbosilane filled with SiC-particles) are being combined with Si and TiC powders to create a new class of polymer-derived ceramics for consideration as advanced nuclear materials in a variety of applications. Compared to pure SiC these materials have increased fracture toughness with only slightly reduced thermal conductivity. Future work with carbon nanotube (CNT) mats will be introduced with the potential to increase the thermal conductivity and the fracture toughness. At present, this report documents the fabrication of a new class of monolithic polymer derived ceramics, SiC + SiC/Ti3SiC2 dual phase materials. The fracture toughness of the dual phase material was measured to be significantly greater than Hexoloy SiC using indentation fracture toughness testing. However, thermal conductivity of the dual phase material was reduced compared to Hexoloy SiC, but was still appreciable, with conductivities in the range of 40 to 60 W/(m K). This report includes synthesis details, optical and scanning electron microscopy images, compositional data, fracture toughness, and thermal conductivity data.

  5. FINDING ROWS OF PEOPLE IN GROUP IMAGES Andrew C. Gallagher

    E-Print Network [OSTI]

    Chen, Tsuhan

    People are among the most popular subjects in photography, and in many social settings, images of groupsFINDING ROWS OF PEOPLE IN GROUP IMAGES Andrew C. Gallagher Carnegie Mellon University Department of people are captured. People often arrange themselves in a very struc- tured manner in these group images

  6. Row Buffer Locality Aware Caching Policies for Hybrid Memories

    E-Print Network [OSTI]

    strengths A hybrid memory system (DRAM-PCM) aims for best of both Problem: How to place data between static energy (no refresh) 6 DRAM PCM CPU MC MC #12;Hybrid Memory Design direction: DRAM as a cache memory devices? 8 DRAM PCM CPU MC MC #12;Outline Background: Hybrid Memory Systems Motivation: Row

  7. Impact of SiC Devices on Hybrid Electric and Plug-in Hybrid Electric Vehicles

    E-Print Network [OSTI]

    Tolbert, Leon M.

    of battery bank can be reduced for optimum design. Keywords -- Silicon carbide (SiC), inverter, hybrid -- The application of SiC devices (as battery interface, motor controller, etc.) in a hybrid electric vehicle (HEV has rapidly expanded. The application of SiC devices (as battery interface, motor controller, etc

  8. sics-logo kth-logo The Swedish Institute of Computer Science

    E-Print Network [OSTI]

    sics-logo kth-logo The Swedish Institute of Computer Science Ian Marsh 1st February 2007 Ian Marsh The Swedish Institute of Computer Science #12;sics-logo kth-logo General Information The Swedish Institute and the international research community. Ian Marsh The Swedish Institute of Computer Science #12;sics-logo kth-logo

  9. Effects of row spacing on diseases, herbicide persistence, and qualitative characteristics of peanut

    E-Print Network [OSTI]

    Besler, Brent Alan

    2005-08-29T23:59:59.000Z

    white mold (57%) and rust (58%). Azoxystrobin also controlled white mold (58%) and controlling rust (44%). Both fungicides reduced leaf spot severity in the conventional and twin rows when compared to untreated plots. Twin rows showed a 10% yield...

  10. Corrosion of SiC and oxide-composite ceramics by a simulated steam-reformer atmosphere

    SciTech Connect (OSTI)

    Federer, J.I.; Kim, H.E.; Moorhead, A.J.

    1991-09-01T23:59:59.000Z

    To achieve higher process efficiency by using pressurized reactants and/or heat transfer fluids, the US DOE is promoting development of high-pressure heat exchanger systems under cost-sharing agreements with industrial contractors. The steam reformer would contain more than 600 tubes. Because the combination of high temperature and pressure differential of 12.7 kg/cm{sup 2} (180 psig) across the tube wall is too severe for metallic tubes, ceramic materials are being considered for reformer tubes. Their use is expected to increase the efficiency of steam reformers by about 19%. At ORNL, four SiC ceramics, a SiC-TiB{sub 2} composite, a Si{sub 3}N{sub 4}-bonded SiC ceramic, and two alumina-matrix composites were selected as candidate materials for heat exchanger/steam-reformer tubes. These commercially available materials were exposed to a simulated steam-reformer atmosphere for up to 2000 h at 1260{degrees}C to assess their corrosion behavior and the effect of the exposure on their flexure strength (in air) at 20 and 1260{degrees}C. The approximate partial pressures of the constituents of the gas mixture at 1 atm total pressure were 0.54 H{sub 2}, 0.13 CO, 0.03 CO{sub 2}m 0.004 CH{sub 4}, and 0.30 H{sub 2}O. All but one material had net weight gains during the exposure test. The flexure strengths of the SiC and Si{sub 3}N{sub 4} ceramics and the SiC-TiB{sub 2} composite at 20 and 1260{degrees}C were not changed significantly by corrosion. The strengths of the alumina-matrix composites were decreased by corrosion; however, the strength of one of these (reinforced with SiC whiskers) was still higher than that of any other material after 500 h. The other alumina composite (containing SiC particles) exhibited the largest strength decrease of any material. The strength retention of the SiC ceramics and the SiC-TiB{sub 2} composite and the strength loss of the composites were associated with surface layers caused by corrosion. 12 refs., 12 figs., 4 tabs.

  11. SIC (MUltiple SIgnal Classification) CSP (Cross-power Spectrum Phase)

    E-Print Network [OSTI]

    Takiguchi, Tetsuya

    2ch CSP ( ) 1 MU- SIC (MUltiple SIgnal Classification) CSP (Cross- power Spectrum Phase) [1, 2, 3, 4] [5, 6] [7, 8, 9, 10] [7] CSP CSP [8] [9] CSP [10] Estimation of talker's head orientation based (Kobe univ.) [11] 2ch CSP CSP CSP CSP 2 CSP GCC-PHAT (Generalized Cross- Correlation PHAse Transform

  12. RowClone: Fast and Energy-Efficient In-DRAM Bulk Data Copy and Initialization

    E-Print Network [OSTI]

    RowClone: Fast and Energy-Efficient In-DRAM Bulk Data Copy and Initialization Processor MemoryChannel Limited bandwidth High energy Carnegie Mellon University Intel Pittsburgh #12;RowClone: Fast and Energy-Efficient University Intel Pittsburgh #12;RowClone: Fast and Energy-Efficient In-DRAM Bulk Data Copy and Initialization

  13. Spacing of Rows in Corn and Its Effect Upon Grain Yield.

    E-Print Network [OSTI]

    Conner, A. B. (Arthur Benjamin)

    1918-01-01T23:59:59.000Z

    cornpal-sble and applicable in the field under the systems of planting used. 'igure 2.-Spacing of rows three fiet apart with individual stalks36 inches apart in the row. This distribution rairies 4840 stalks to th? acre. Figure 3.-Spacing of rows s...

  14. Impact of SiC Power Electronic Devices for Hybrid Electric Vehicles Leon M. Tolbert1,2

    E-Print Network [OSTI]

    Tolbert, Leon M.

    02FCC-37 Impact of SiC Power Electronic Devices for Hybrid Electric Vehicles Leon M. Tolbert1 properties of silicon carbide (SiC) power electronic devices compared with silicon (Si) are expected to have characteristics of Si and SiC are used to develop a simulation model for SiC power electronics devices. The main

  15. The phase diagram of the staggered row model for magnetism

    E-Print Network [OSTI]

    Zhang, Weimin

    1991-01-01T23:59:59.000Z

    to frustration, ' ' and make spin systems exhibit rich phase structure and critical phenomena. One example is Villain's model of fully frustrated XY spins on the square lattice. ' In this model each plaquette has three ferromagnetic and one antiferro... goes in an antiferromagnetic state with ferromagnetic rows whose direction alternates as one moves vertically. In analogy to the generalization by Berge et al. of Villain's fully-frustrated model of XY spins on a square lattice, G. Parker, W. Saslow...

  16. Fractographic investigation of flaws in sintered SiC fiber

    SciTech Connect (OSTI)

    Srinivasan, G.V.; Venkateswaran, V. [Carborundum Company, Niagara Falls, NY (United States)

    1996-12-31T23:59:59.000Z

    The Carborundum Company has developed a continuous process to produce multifilament, polycrystalline SiC fiber tow. The process uses a melt spinning approach to make the green fibers wherein the submicron SiC powder is mixed with polymers and the resulting compound is melt spun and extruded through a spinnerette. After extraction, the green fibers are sintered in a continuous sintering line. The properties of this fiber are given. This paper will describe the use of fractography in directing the fiber developmental efforts, specifically on characterization of strength-limiting defects and their origination. Fractographic analysis is also extended to determining strength of fibers at any gauge length and in identifying artifacts associated with the tensile strength testing technique.

  17. Research on microwave joining of SiC

    SciTech Connect (OSTI)

    Silberglitt, R. [FM Technologies, Inc., Fairfax Station, VA (United States)

    1995-07-31T23:59:59.000Z

    Results: identification of optimum joining temperature range for reaction bonded Si carbide at 1420-1500 C; demonstration that specimens joined within this range have fracture roughness greater than as-received material; and demonstration of ability to use SiC formed in situ from the decomposition of polycarbosilane as a joining aid for sintered Si carbide. In the latter case, the interlayer material was also shown to fill any pores in the joining specimens near the interlayer. Together with the demonstration of leaktight joints between tube sections of reaction bonded and sintered SiC under the previous contract, these results provide the foundation for scaleup to joining of the larger and longer tubes needed for radiant burner and heat exchanger tube assemblies. The formation of SiC in situ is important because maintaining roundness of these large tubes is a technical challenge for the tube manufacturer, so that formation of a leaktight joint may require some degree of gap filling.

  18. File:UtilityROW.pdf | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdf Jump to:ar-80m.pdf JumpUsgs.9.2010.Fig01.pdf JumpUtilityROW.pdf Jump to:

  19. Investigation of the Distribution of Fission Products Silver, Palladium and Cadmium in Neutron Irradiated SIC using a Cs Corrected HRTEM

    SciTech Connect (OSTI)

    I. J. van Rooyen; E. Olivier; J. H Neethlin

    2014-10-01T23:59:59.000Z

    Electron microscopy examinations of selected coated particles from the first advanced gas reactor experiment (AGR-1) at Idaho National Laboratory (INL) provided important information on fission product distribution and chemical composition. Furthermore, recent research using STEM analysis led to the discovery of Ag at SiC grain boundaries and triple junctions. As these Ag precipitates were nano-sized, high resolution transmission electron microscopy (HRTEM) examination was used to provide more information at the atomic level. This paper describes some of the first HRTEM results obtained by examining a particle from Compact 4-1-1, which was irradiated to an average burnup of 19.26% fissions per initial metal atom (FIMA), a time average, volume-averaged temperature of 1072C; a time average, peak temperature of 1182C and an average fast fluence of 4.13 x 1021 n/cm2. Based on gamma analysis, it is estimated that this particle may have released as much as 10% of its available Ag-110m inventory during irradiation. The HRTEM investigation focused on Ag, Pd, Cd and U due to the interest in Ag transport mechanisms and possible correlation with Pd, Ag and U previously found. Additionally, Compact 4-1-1 contains fuel particles fabricated with a different fuel carrier gas composition and lower deposition temperatures for the SiC layer relative to the Baseline fabrication conditions, which are expected to reduce the concentration of SiC defects resulting from uranium dispersion. Pd, Ag, and Cd were found to co-exist in some of the SiC grain boundaries and triple junctions whilst U was found to be present in the micron-sized precipitates as well as separately in selected areas at grain boundaries. This study confirmed the presence of Pd both at inter- and intragranular positions; in the latter case specifically at stacking faults. Small Pd nodules were observed at a distance of about 6.5 micron from the inner PyC/SiC interface.

  20. MEASUREMENTS OF SPECIFIC ELECTRICAL CONTACT RESISTANCE BETWEEN SIC AND LEAD-LITHIUM EUTECTIC ALLOY

    E-Print Network [OSTI]

    Abdou, Mohamed

    MEASUREMENTS OF SPECIFIC ELECTRICAL CONTACT RESISTANCE BETWEEN SIC AND LEAD-LITHIUM EUTECTIC ALLOY Neil B. Morley, Albert Medina, and Mohamed A. Abdou Mechanical &Aerospace Engineering, UCLA, Los resistance of disks of high purity CVD SiC were measured with liquid lead-lithium eutectic (LLE) alloy melts

  1. Graphene on Carbon-face SiC{0001} Surfaces Formed in a Disilane Environment

    E-Print Network [OSTI]

    Feenstra, Randall

    Graphene on Carbon-face SiC{0001} Surfaces Formed in a Disilane Environment N. Srivastavaa , Guowei-face, graphene, interface structure, low energy electron microscopy, disilane Abstract. The formation of epitaxial graphene on SiC( 1000 ) in a disilane environment is studied. The higher graphitization

  2. MAGNETOHYDRODYNAMIC AND THERMAL ISSUES OF THE SiCf0SiC FLOW CHANNEL INSERT

    E-Print Network [OSTI]

    Abdou, Mohamed

    ) made of a silicon carbide composite (SiCf /SiC), which serves as electric and thermal insulator considered. The computa- tions were performed in a parametric form, using the electric and thermal. INTRODUCTION Flow channel inserts ~FCIs! made of a silicon car- bide composite ~SiCf 0SiC! were first proposed

  3. UPDATE ON SIC-BASED INVERTER TECHNOLOGY Abstract This paper presents a study of Silicon

    E-Print Network [OSTI]

    Tolbert, Leon M.

    UPDATE ON SIC-BASED INVERTER TECHNOLOGY Abstract This paper presents a study of Silicon Carbide, Silicon carbide (SiC) I. INTRODUCTION The role of power electronics in the electrical energy conversion sector is increasing by the decade [1]. Also, with the growth of power electronics as the interface

  4. The Opie Compiler from Row-major Source to Morton-ordered Matrices

    E-Print Network [OSTI]

    Wise, David Stephen

    The Opie Compiler from Row-major Source to Morton-ordered Matrices Steven T. Gabriel Computer The Opie Project aims to develop a compiler to transform C codes written for row-major matrix the formalism behind the Opie com- piler for C, its status: now compiling several standard Level- 2 and Level-3

  5. High Fidelity Modeling of Blade Row Interaction in a Transonic Compressor

    E-Print Network [OSTI]

    Cincinnati, University of

    High Fidelity Modeling of Blade Row Interaction in a Transonic Compressor Michael G. List in a transonic compressor, a time-accurate simulation of a transonic compressor rig was developed. Initially on the compressor. Three dierent axial spacings between the rotor and the upstream blade row have been simulated

  6. Oxidation of SiC cladding under Loss of Coolant Accident (LOCA) conditions in LWRs

    SciTech Connect (OSTI)

    Lee, Y.; Yue, C.; Arnold, R. P.; McKrell, T. J.; Kazimi, M. S. [Dept. of Nuclear Science and Engineering, Massachusetts Inst. of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139-4307 (United States)

    2012-07-01T23:59:59.000Z

    An experimental assessment of Silicon Carbide (SiC) cladding oxidation rate in steam under conditions representative of Loss of Coolant Accidents (LOCA) in light water reactors (LWRs) was conducted. SiC oxidation tests were performed with monolithic alpha phase tubular samples in a vertical quartz tube at a steam temperature of 1140 deg. C and steam velocity range of 1 to 10 m/sec, at atmospheric pressure. Linear weight loss of SiC samples due to boundary layer controlled reaction of silica scale (SiO{sub 2} volatilization) was experimentally observed. The weight loss rate increased with increasing steam flow rate. Over the range of test conditions, SiC oxidation rates were shown to be about 3 orders of magnitude lower than the oxidation rates of zircaloy 4. A SiC volatilization correlation for developing laminar flow in a vertical channel is formulated. (authors)

  7. SiC's Potential Impact on the Design of Wind Generation System , Leon M. Tolbert1,2

    E-Print Network [OSTI]

    Tolbert, Leon M.

    SiC's Potential Impact on the Design of Wind Generation System Hui Zhang1 , Leon M. Tolbert1 National Laboratory Knoxville, TN 37932 Abstract -- The potential impact of SiC devices on a wind temperatures and frequencies. A conclusion is drawn that the SiC converters can improve the wind system

  8. Application of organosilicon pre-sic polymer technology to optimize rapid prototyping of ceramic components

    SciTech Connect (OSTI)

    Saha, C.K.; Zank, G. [Dow Corning Corporation, Midland, MI (United States); Ghosh, A. [Philips Display Components Co., Ann Arbor, MI (United States)

    1995-12-01T23:59:59.000Z

    Developments of applications of advanced ceramics e.g., SiC, Si{sub 3}N{sub 4}, CMCs need to be on a faster track than what the current processing technologies can afford. Rapid reduction in time to market of new and complex products can be achieved by using Rapid Prototyping and Manufacturing Technologies (RP&M) e.g., 3D-printing, selective laser sintering, stereolithography etc. These technologies will help advanced ceramics meet the performance challenges at an affordable price with reliable manufacturing technologies. The key variables of the RP&M technologies for ceramics are the nature of the polymer carrier and/or the binder, and the powder. Selection and/or the production of a proper class of polymer carrier/binder, understanding their impact on the processing of ceramics such as polymer-powder interaction, speed of hardening the green body in a controlled manner, ability to retain shape during forming and consolidation, delivering desirable properties at the end, are crucial to develop the low cost, high quality ceramic products. Organosilicon pre-SiC polymer technology route to advanced ceramics is currently being commercialized by Dow Corning. Methods to use this class of polymer as a processing aid in developing potentially better RP&M technologies to make better ceramics have been proposed in this work.

  9. In situ toughened SiC ceramics with Al-B-C additions and oxide-coated SiC platelet/SiC composites

    SciTech Connect (OSTI)

    Cao, J. [Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Mineral Engineering; [Lawrence Berkeley National Lab., CA (United States). Materials Sciences Div.

    1996-12-01T23:59:59.000Z

    This work aimed at fabrication and characterization of high toughness SiC ceramics through the applications of in situ toughening and SiC platelet reinforcement. The processing-microstructure-property relations of hot pressed SiC with Al, B, and C additions (designated as ABC-SiC) were investigated. Through a liquid phase sintering mechanism, dense SiC was obtained by hot pressing at a temperature as low as 1,700 C with 3 wt% Al, 0.6 wt% B, and 2 wt% C additions. These sintering aids also enhanced the {beta}-to-{alpha} (3C-to-4H) phase transformation, which promoted SiC grains to grow into plate-like shapes. Under optimal processing conditions, the microstructure exhibited high-aspect-ratio plate-shaped grains with a thin (< 1 nm) Al-containing amorphous grain boundary film. The mechanical properties of the toughened SiC and the composites were evaluated in comparison with a commercial Hexoloy SiC under identical test conditions. The C-curve behavior was examined using the strength-indentation load relationship and compared with that directly measured using precracked compact tension specimens. The in situ toughened ABC-SiC exhibited much improved flaw tolerance and a significantly rising R-curve behavior. A steady-state toughness in excess of 9 MPam{sup 1/2} was recorded for the ABC-SiC in comparison to a single valued toughness below 3 MPam{sup 1/2} for the Hexoloy. Toughening in the ABC-SiC was mainly attributed to grain bridging and subsequent pullout of the plate-shaped grains. The high toughness ABC-SiC exhibited a bend strength of 650 MPa with a Weibull modulus of 19; in comparison, the commercial SiC showed a bend strength of 400 MPa with a Weibull modulus of 6. Higher fracture toughness was also achieved by the reinforcement of SiC platelets, encapsulated with alumina, yttria, or silica, in a SiC matrix.

  10. Clamping of Solid Tungsten Components for the Bulk W Divertor Row in JET Precautionary Design for a Brittle Material

    E-Print Network [OSTI]

    Clamping of Solid Tungsten Components for the Bulk W Divertor Row in JET Precautionary Design for a Brittle Material

  11. Power Handling of the Bulk Tungsten Divertor Row at JET: First Measurements and Comparison to the GTM Thermal Model

    E-Print Network [OSTI]

    Power Handling of the Bulk Tungsten Divertor Row at JET: First Measurements and Comparison to the GTM Thermal Model

  12. Effect of tillage systems, row configuration-spacing and plant population on soil physical properties, evapotranspiration and dryland sorghum yields

    E-Print Network [OSTI]

    Salinas-Garcia, Jaime Roel

    1981-01-01T23:59:59.000Z

    in the convencional plots (101. 6-cm rows). The increase in yield was due primarily to the larger number of heads at harvest as compared with the conventional row-spacing. Clegg et al. (1972) observed that variation of row width can be used in greater utilization...

  13. Molecular-jet chemical vapor deposition of SiC

    SciTech Connect (OSTI)

    Lubben, D.; Jellison, G.E.; Modine, F.A.

    1995-09-01T23:59:59.000Z

    SiC films have been deposited by molecular-jet chemical vapor deposition (MJCVD) on Si(001) substrates. Methylsilane (MS) diluted in He was used as a precursor for deposition under conditions which produced a MS molecular beam with 0.365 eV translational energy. Films grown at temperatures between 1000 and 1150 C and above {approx}1200 C were single crystal as judged by electron channeling, while those grown at intermediate temperatures were polycrystalline. Films grown at lower temperatures generally had a smoother surface morphology for moderate thicknesses, although all films showed at least some degree of faceting. The best thick films, up to 4 {mu}m, were obtained for substrate temperatures of {approx}1210 C under flow conditions which produced a deposition rate of {approx}1200 {angstrom} per minute.

  14. Effect of Oxygen Adsorption on the Local Properties of Epitaxial Graphene on SiC (0001)

    E-Print Network [OSTI]

    Mathieu, C; Mentes, T O; Pallecchi, E; Locatelli, A; Latil, S; Belkhou, R; Ouerghi, A

    2015-01-01T23:59:59.000Z

    The effect of oxygen adsorption on the local structure and electronic properties of monolayer graphene grown on SiC(0001) has been studied by means of Low Energy Electron Microscopy (LEEM), microprobe Low Energy Electron Diffraction (\\muLEED) and microprobe Angle Resolved Photoemission (\\muARPES). We show that the buffer layer of epitaxial graphene on SiC(0001) is partially decoupled after oxidation. The monitoring of the oxidation process demonstrates that the oxygen saturates the Si dangling bonds, breaks some Si-C bonds at the interface and intercalates the graphene layer. Accurate control over the oxidation parameters enables us to tune the charge density modulation in the layer.

  15. Synthesis of nanostructured SiC using the pulsed laser deposition technique

    SciTech Connect (OSTI)

    Zhang, H.X. [Institute for Functional Nanomaterials, University of Puerto Rico, San Juan, PR 00931 (United States); Department of Physics, University of Puerto Rico, P.O. Box 23343, San Juan, PR 00931 (United States); Feng, P.X. [Institute for Functional Nanomaterials, University of Puerto Rico, San Juan, PR 00931 (Puerto Rico); Department of Physics, University of Puerto Rico, P.O. Box 23343, San Juan, PR 00931 (Puerto Rico)], E-mail: peterxianping@vmail.uprrp.edu; Makarov, V.; Weiner, B.R. [Institute for Functional Nanomaterials, University of Puerto Rico, San Juan, PR 00931 (Puerto Rico); Department of Chemistry, University of Puerto Rico, P.O. Box 23346, San Juan, PR 00931 (Puerto Rico); Morell, G. [Institute for Functional Nanomaterials, University of Puerto Rico, San Juan, PR 00931 (Puerto Rico); Department of Physics, University of Puerto Rico, P.O. Box 23343, San Juan, PR 00931 (Puerto Rico)

    2009-01-08T23:59:59.000Z

    We report the new results on the direct synthesis of nanostructured silicon carbide (SiC) materials using the pulsed laser deposition technique. Scanning electron microscopy images revealed that SiC nanoholes, nanosprouts, nanowires, and nanoneedles were obtained. The crystallographic structure, chemical composition, and bond structure of the nanoscale SiC materials were investigated using X-ray diffraction, energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and Raman scattering spectroscopy. The transverse optical mode and longitudinal optical mode in Raman spectra were found to become sharper as the substrate temperature was increased, while the material structure evolved from amorphous to crystalline.

  16. A competitive genetic algorithm for single row facility layout

    E-Print Network [OSTI]

    2012-02-22T23:59:59.000Z

    Feb 22, 2012 ... quality solutions. ... ate selection of genetic operators can yield high quality solutions in spite of ..... uk/staff/letchfoa/articles/SRFLP-rev.pdf.

  17. " Row: Industry-Specific Technologies within Selected NAICS Codes;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of Energy for613.1.3.13.

  18. Level: National and Regional Data; Row: Selected NAICS Codes; Column: Energy Sources

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for On-Highway4,1,50022,3,,,,6,1,9,1,50022,3,,,,6,1,Decade EnergyTennesseeYear Jan Next MECS will be fielded in 2015

  19. Fact #777: April 29, 2013 For the Second Year in a Row, Survey...

    Energy Savers [EERE]

    777: April 29, 2013 For the Second Year in a Row, Survey Respondents Consider Fuel Economy Most Important When Purchasing a Vehicle Fact 777: April 29, 2013 For the Second...

  20. A Model of Compressor Blade Row Interaction with Shock Induced Vortex Shedding

    E-Print Network [OSTI]

    Cincinnati, University of

    A Model of Compressor Blade Row Interaction with Shock Induced Vortex Shedding Mark G. Turner = circulation = trailing edge thickness = shock angle = density I. Introduction ransonic compressor stages AIAA. Research Scientist, Compressor Aerodynamic Research Laboratory, Associate Fellow AIAA

  1. Economic Implications of New Crops, Row Damming and Land Clearing in the Texas Winter Garden

    E-Print Network [OSTI]

    Muncrief, G.E.; Lacewell, R. D.; Cornforth, G. C.; Pena, J. G.

    TR- 123 1983 Economic Implications of New Crops, Row Damming and Land Clearing in the Texas Winter Garden G.E. Muncrief R.D. Lacewell G.C. Cornforth J.G. Pena Texas Water Resources Institute...

  2. Quarter Annulus Simulations of Blade Row Interaction at Several Gaps and Discussion of

    E-Print Network [OSTI]

    Cincinnati, University of

    annulus simulations to investigate the physics involved in the rotor bow shock interaction with a highly loaded upstream blade row and its eect on the compressor. Three dierent axial spacings between the rotor

  3. A Column-Row-Parallel ASIC architecture for 3D wearable / portable medical ultrasonic imaging

    E-Print Network [OSTI]

    Chen, Kailiang

    2014-01-01T23:59:59.000Z

    This work presents a scalable Column-Row-Parallel ASIC architecture for 3D wearable / portable medical ultrasound. It leverages programmable electronic addressing to achieve linear scaling for both hardware interconnection ...

  4. Analysis of conventional and plutonium recycle unit-assemblies for the Yankee (Rowe) PWR

    E-Print Network [OSTI]

    Mertens, Paul Gustaaf

    1971-01-01T23:59:59.000Z

    An analysis and comparison of Unit Conventional UO2 Fuel-Assemblies and proposed Plutonium Recycle Fuel Assemblies for the Yankee (Rowe) Reactor has been made. The influence of spectral effects, at the watergaps -and ...

  5. Breakthrough in Power Electronics from SiC: May 25, 2004 - May 31, 2005

    SciTech Connect (OSTI)

    Marckx, D. A.

    2006-03-01T23:59:59.000Z

    This report explores the premise that silicon carbide (SiC) devices would reduce substantially the cost of energy of large wind turbines that need power electronics for variable speed generation systems.

  6. Numerical design of SiC bulk crystal growth for electronic applications

    SciTech Connect (OSTI)

    Wejrzanowski, T.; Grybczuk, M.; Kurzydlowski, K. J. [Warsaw University of Technology, Faculty of Materials Science and Engineering, Woloska 141, 02507 Warsaw (Poland); Tymicki, E. [Institute of Electronic Materials Technology, Wolczynska 133, 01919 Warsaw (Poland)

    2014-10-06T23:59:59.000Z

    Presented study concerns numerical simulation of Physical Vapor Transport (PVT) growth of bulk Silicon Carbide (SiC) crystals. Silicon Carbide is a wide band gap semiconductor, with numerous applications due to its unique properties. Wider application of SiC is limited by high price and insufficient quality of the product. Those problems can be overcame by optimizing SiC production methods. Experimental optimization of SiC production is expensive because it is time consuming and requires large amounts of energy. Numerical modeling allows to learn more about conditions inside the reactor and helps to optimize the process at much lower cost. In this study several simulations of processes with different reactor geometries were presented along with discussion of reactor geometry influence on obtained monocrystal shape and size.

  7. Pitting Corrosion in CVD SiC at 300?C in Deoxygenated High-Purity Water

    SciTech Connect (OSTI)

    Henager, Charles H.; Schemer-Kohrn, Alan L.; Pitman, Stan G.; Senor, David J.; Geelhood, Ken J.; Painter, Chad L.

    2008-08-15T23:59:59.000Z

    SiC is a candidate for nuclear applications at elevated temperatures but has not been fully studied under typical light-water reactor operating conditions, such as moderate temperatures and high pressures. Coupons of high-purity chemical vapor deposited SiC were exposed to deoxygenated, pressurized water at 573K and 100 Bar for up to 4000 hours. Ceramographic examination of the exposed SiC surfaces revealed both embryonic and large, d > 300 m, pits on the surface. The pits were characterized using scanning electron microscopy for structure and chemistry analysis. Pit densities were also determined by standard counting methods. The chemical analysis revealed that the pits are associated with the formation of silica and subsequent loss of Si, which is expected due to several suggested reactions between SiC and water.

  8. Synthesis of One-Dimensional SiC Nanostructures from a Glassy Buckypaper

    SciTech Connect (OSTI)

    Ding, Mengning; Star, Alexander

    2013-03-27T23:59:59.000Z

    A simple and scalable synthetic strategy was developed for the fabrication of one-dimensional SiC nanostructures - nanorods and nanowires. Thin sheets of single-walled carbon nanotubes (SWNTs) were prepared by vacuum filtration and were washed repeatedly with sodium silicate (Na{sub 2}SiO{sub 3}) solution. The resulting glassy buckypaper was heated at 1300 - 1500 C under Ar/H{sub 2} to allow a solid state reaction between C and Si precursors to form a variety of SiC nanostructures. The morphology and crystal structures of SiC nanorods and nanowires were characterized using scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), energy dispersive xray spectroscopy (EDX), electron diffraction (ED) and x-ray diffraction (XRD) techniques. Furthermore, electrical conductance measurements were performed on SiC nanorods, demonstrating their potential applications in high-temperature sensors and control systems.

  9. Stopping power measurements of He ions in Si and SiC by time...

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

    power measurements of He ions in Si and SiC by time-of-flight spectrometry. Abstract: Electronic energy loss is the fundamental mechanism accountable for the response of...

  10. Vehicle Technologies Office Merit Review 2014: Development of SiC Large Tapered Crystal Growth

    Broader source: Energy.gov [DOE]

    Presentation given by NASA at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about development of SiC large tapered crystal...

  11. Behavior of Si and C atoms in ion amorphized SiC. | EMSL

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

    analysis. Neither Si nor C in the amorphized SiC exhibits a significant mass transport by diffusion during the irradiation and subsequent storage at room temperature. There is no...

  12. Cellu-WHAT?-sic: Communicating the Biofuels Message to Local Stakeholders

    Broader source: Energy.gov [DOE]

    Breakout Session 3DBuilding Market Confidence and Understanding III: Engaging Key Audiences in Bioenergy Cellu-WHAT?-sic: Communicating the Biofuels Message to Local Stakeholders Matt Merritt, Director, Public Relations, POETDSM Advanced Biofuels

  13. The development of chemically vapor deposited mullite coatings for the corrosion protection of SiC

    SciTech Connect (OSTI)

    Auger, M.; Hou, P.; Sengupta, A.; Basu, S.; Sarin, V. [Boston Univ., MA (United States)

    1998-05-01T23:59:59.000Z

    Crystalline mullite coatings have been chemically vapor deposited onto SiC substrates to enhance the corrosion and oxidation resistance of the substrate. Current research has been divided into three distinct areas: (1) Development of the deposition processing conditions for increased control over coating`s growth rate, microstructure, and morphology; (2) Analysis of the coating`s crystal structure and stability; (3) The corrosion resistance of the CVD mullite coating on SiC.

  14. Microwave-assisted pyrolysis of SiC and its application to joining

    SciTech Connect (OSTI)

    Ahmad, I.; Silberglitt, R. [FM Technologies, Inc., Fairfax, VA (United States); Shan, T.A. [George Mason Univ., Fairfax, VA (United States)] [and others

    1995-07-01T23:59:59.000Z

    Microwave energy has been used to pyrolyze silicon carbide from commercially available polycarbosilane precursor. The pyrolysis was performed on SiC surfaces having various surface treatments, to identify conditions which improve the wetting and adherence. Grinding and etching of the surfaces in hydrofluoric (HF) acid promotes the bonding of precursor derived ceramic to the SiC ceramic. Finally, the polycarbosilane precursor mixed with fine silicon carbide powder was used as the interlayer material to join silicon carbide specimens.

  15. U.S. Department of Energy Accident Resistant SiC Clad Nuclear Fuel Development

    SciTech Connect (OSTI)

    George W. Griffith

    2011-10-01T23:59:59.000Z

    A significant effort is being placed on silicon carbide ceramic matrix composite (SiC CMC) nuclear fuel cladding by Light Water Reactor Sustainability (LWRS) Advanced Light Water Reactor Nuclear Fuels Pathway. The intent of this work is to invest in a high-risk, high-reward technology that can be introduced in a relatively short time. The LWRS goal is to demonstrate successful advanced fuels technology that suitable for commercial development to support nuclear relicensing. Ceramic matrix composites are an established non-nuclear technology that utilizes ceramic fibers embedded in a ceramic matrix. A thin interfacial layer between the fibers and the matrix allows for ductile behavior. The SiC CMC has relatively high strength at high reactor accident temperatures when compared to metallic cladding. SiC also has a very low chemical reactivity and doesn't react exothermically with the reactor cooling water. The radiation behavior of SiC has also been studied extensively as structural fusion system components. The SiC CMC technology is in the early stages of development and will need to mature before confidence in the developed designs can created. The advanced SiC CMC materials do offer the potential for greatly improved safety because of their high temperature strength, chemical stability and reduced hydrogen generation.

  16. Preparation and dielectric properties of SiC nanowires self-sacrificially templated by carbonated bacterial cellulose

    SciTech Connect (OSTI)

    Wen, Lixia; Ma, Yongjun; Dai, Bo [State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010 (China)] [State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010 (China); Zhou, Yong [Eco-materials and Renewable Energy Research Center (ERERC), School of Physics, National Lab of Solid State Microstructure, ERERC, Nanjing University, Nanjing 210093 (China)] [Eco-materials and Renewable Energy Research Center (ERERC), School of Physics, National Lab of Solid State Microstructure, ERERC, Nanjing University, Nanjing 210093 (China); Liu, Jinsong [State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010 (China)] [State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010 (China); Pei, Chonghua, E-mail: peichonghua@swust.edu.cn [State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010 (China)] [State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010 (China)

    2013-02-15T23:59:59.000Z

    Graphical abstract: Display Omitted Highlights: ? A new material CBC is introduced as a template to prepare SiC nanowires. ? SiC nanowires are synthesized by the infiltration process of reactive vapor Si. ? The highest ?? of ?-SiC nanowires is obtained at 1400 C. -- Abstract: SiC nanowires were synthesized by the infiltration process of reactive vapor Si in Ar atmosphere at 13501450 C, using carbonated bacterial cellulose (CBC) as carbon template and a reactant. Scanning electron microscopy (SEM), powder X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), and vector network analyzer were employed to characterize the samples. The diameter of the resulting ?-SiC nanowires changes with calcination temperatures, specifically, 3560 nm for 1350 C, 4080 nm for 1400 C, and 3060 nm for 1450 C. The ?-SiC nanowires obtained at 1400 C possess the highest ?? of complex permittivity.

  17. Matrix-grain-bridging contributions to the toughness of SiC composites with alumina-coated SiC platelets

    SciTech Connect (OSTI)

    Cao, J.J.; He, Y.; MoberlyChan, W.J.; De Jonghe, L.C. [Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Mineral Engineering]|[Lawrence Berkeley Lab., CA (United States). Materials Science Div.

    1996-05-01T23:59:59.000Z

    Silicon carbide composites were fabricated through the incorporation of alumina-coated SiC platelets into a SiC matrix. Mechanical properties were evaluated in direct comparison with a commercial Hexoloy SiC. The fracture toughness of the composite, with a fine grained {beta}-SiC matrix, was twice that of the commercial material. The alumina-coating on the platelets provided a weak interface to promote crack deflection and platelet bridging, as well as easing densification of the composites. On the other hand, a three-fold increase in fracture toughness (9.1 MPa {radical}m) of an in situ toughened monolithic SiC was achieved by processing at higher temperatures, promoting the {beta}-to-{alpha} phase transformation and forming a microstructure containing high-aspect-ration plate-shaped grains. Efforts were made to combine the effects of coated-platelets reinforcement and in situ toughening in the matrix. Moderate high toughness (8 MPa {radical}m) was achieved by coupled toughening. The contribution of matrix-grain-bridging, however, was limited by the processing temperature at which the oxide coating was stable.

  18. Development of a compound for low temperature joining of SiC ceramics and CFCC composites

    SciTech Connect (OSTI)

    Anderson, I.E.; Ijadi-Maghsoodi, S.; Uenal, O. [Ames Lab., IA (United States)] [and others

    1997-11-01T23:59:59.000Z

    This investigation was driven by the need for a robust, practical method to join continuous fiber-reinforced ceramic composite (CFCC) materials composed of SiC fibers in a SiC matrix (SiC/SiC). A new filler compound composition resulted from this research which is composed primarily of a silicon-acetylene ceramic precursor polymer blended with fine alloy and elemental powders. Joint formation relies on reaction of the powders with the products of the polymer pyrolysis reaction and the CFCC on continuous heating from room temperature to the curing temperature. The joint can be heated and cured either in an inert or air atmosphere furnace or in air upon heating with a propane torch to a maximum curing temperature of about 1200{degrees}C. This curing temperature is effective for joint formation while preventing degradation of the SiC fibers in the CFCC material and permitting field joining of SiC CFCC parts with an open flame torch. The joining compound demonstrated good wetting and joint filling characteristics. Mechanical property testing revealed a room temperature bend strength of 50 to 100MPa (7 to 14ksi), depending on care in joint preparation. There was a tendency for partial SiC fiber pullout as the crack propagation path wandered in and out of the joint material during fracture, adding toughness. Preliminary mechanical tests of joined samples, after exposure to high temperature (1100{degrees}C) ambient air for 100 hours. indicated excellent retention of strength.

  19. Technique for mounting SiC fibers for cross-sectional microscopic examination

    SciTech Connect (OSTI)

    Ptasienski, J.J. (Alcoa Technical Center, Alcoa Center, PA (United States))

    1994-07-01T23:59:59.000Z

    Silicon carbide (SiC) fibers are commonly used in many composite and other material applications. It is often of interest to examine cross sections of such fibers microscopically, prior to composite manufacturing processes, to ensure diameter consistency. However, SiC fibers are difficult materials to metallographically mount and polish, because the fibers are harder than most epoxy mounting materials. The difference in hardness between the SiC and the mounting epoxy usually causes rounding of the fibers during final polishing. It is also difficult to position a large group of fibers for cross-sectioning, because a group of closely spaced fibers will have poor bonding to the epoxy. The following technique was developed to improve the preparation of cross-sectional samples of SiC fibers. In this study, fibers of SiC plated with electroless nickel were used to demonstrate the technique. The following outline describes the steps that were taken in preparing a cross-sectional specimen of the plated fibers.

  20. Identification of dominant scattering mechanism in epitaxial graphene on SiC

    SciTech Connect (OSTI)

    Lin, Jingjing; Guo, Liwei, E-mail: lwguo@iphy.ac.cn, E-mail: chenx29@aphy.iphy.ac.cn; Jia, Yuping; Huang, Jiao; Guo, Yu; Li, Zhilin; Chen, Xiaolong, E-mail: lwguo@iphy.ac.cn, E-mail: chenx29@aphy.iphy.ac.cn [Research and Development Center for Functional Crystals, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190 (China); Yang, Rong; Wu, Shuang; Zhang, Guangyu [Nanoscale Physics and Devices Laboratory, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190 (China)

    2014-05-05T23:59:59.000Z

    A scheme of identification of scattering mechanisms in epitaxial graphene (EG) on SiC substrate is developed and applied to three EG samples grown on SiC (0001), (112{sup }0), and (101{sup }0) substrates. Hall measurements combined with defect detection technique enable us to evaluate the individual contributions to the carrier scatterings by defects and by substrates. It is found that the dominant scatterings can be due to either substrate or defects, dependent on the substrate orientations. The EG on SiC (112{sup }0) exhibits a better control over the two major scattering mechanisms and achieves the highest mobility even with a high carrier concentration, promising for high performance graphene-based electronic devices. The method developed here will shed light on major aspects in governing carrier transport in EG to harness it effectively.

  1. Thickness monitoring of graphene on SiC using low-energy electron diffraction P. J. Fisher

    E-Print Network [OSTI]

    Feenstra, Randall

    more general method. A series of samples are prepared by vacuum annealing in a graphene production system (suitable for graphene preparation on semi- insulating SiC, and scalable to large wafer sizes1 Thickness monitoring of graphene on SiC using low-energy electron diffraction P. J. Fisher IBM T

  2. Graphene formed on SiC under various environments: Comparison of Si-face and C-face

    E-Print Network [OSTI]

    Feenstra, Randall

    of the Si atoms thereby leaving behind excess C atoms which self- assemble into the graphene. Preparation1 Graphene formed on SiC under various environments: Comparison of Si-face and C-face N. Srivastava Abstract The morphology of graphene on SiC {0001} surfaces formed in various environments including ultra

  3. Size Effect of SiC Particle on Microstructures and Mechanical Properties of SiCp/Al Composites

    E-Print Network [OSTI]

    Qin, Qinghua

    Cp/Al composites were fabricated using aluminum alloy ZL101 as the matrix material, and SiC particles respectively. The results show that the SiC particles can distribute uniformly in the aluminum matrix using matrix or reinforced materials [1-5]. They are promising materials for aerospace, automotive, thermal

  4. GROWTH OF GaN ON POROUS SiC SUBSTRATES BY PLASMA-ASSISTED MOLECULAR BEAM EPITAXY

    E-Print Network [OSTI]

    Feenstra, Randall

    1 GROWTH OF GaN ON POROUS SiC SUBSTRATES BY PLASMA-ASSISTED MOLECULAR BEAM EPITAXY C. K. Inoki ABSTRACT We have explored the growth of GaN on porous SiC substrates by plasma-assisted molecular beam Ga droplets. Plan-view TEM observations indicate that the GaN layers grown on porous substrates

  5. Plasma-assisted molecular beam epitaxy of GaN on porous SiC substrates with varying porosity

    E-Print Network [OSTI]

    Feenstra, Randall

    1 Plasma-assisted molecular beam epitaxy of GaN on porous SiC substrates with varying porosity York, 12222 Abstract: We have grown GaN on porous SiC substrates and studied the effect of substrate show that the GaN film grown on porous substrates contains open tubes and a low dislocation density

  6. Active & passive oxidation of dense SiC & Al?O? composites

    E-Print Network [OSTI]

    Malhotra, Rohit

    1991-01-01T23:59:59.000Z

    ACTIVE 4 PASSIVE OXIDATION OF DENSE SiC & AI2Oa COMPOSITE% A Thesis ROHIT MALHOTRA 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 December... 1991 Major Subject: Chemical Engineering ACTIVE 4 PASSIVE OXIDATION OF DENSE SiC k AI2O3 COMPOSITES A Thesis ROHIT MALHOTRA Approved as to style and content by: ed M. Gadalla (Chair of Committee) Harry J. Ploehn (Member) eel Christian P...

  7. Quasi-Freestanding multilayer graphene films on the carbon face of SiC

    SciTech Connect (OSTI)

    Siegel, D. A.; Hwang, C. G.; Fedorov, A. V.; Lanzara, A.

    2010-06-30T23:59:59.000Z

    The electronic band structure of as-grown and doped graphene grown on the carbon face of SiC is studied by high-resolution angle-resolved photoemission spectroscopy, where we observe both rotations between adjacent layers and AB-stacking. The band structure of quasi-freestanding AB-bilayers is directly compared with bilayer graphene grown on the Si-face of SiC to study the impact of the substrate on the electronic properties of epitaxial graphene. Our results show that the C-face films are nearly freestanding from an electronic point of view, due to the rotations between graphene layers.

  8. Effects of row spacing, seed rate and maturity group on late planted soybean under irrigated and dryland

    E-Print Network [OSTI]

    Balasundaram, Balabhaskar "Baski"

    to decrease. This purpose of this study is determine the best planting strategies in regards to row spacing. Edwardsville, KS). Plots with 7.5 and 15 in row spacing were planted with a Great Plains Drill model 3P600, and pest management practices were conducted according to Oklahoma State University recommended practices

  9. Row spacing effects on the canopy light extinction coefficient of upland cotton

    E-Print Network [OSTI]

    Steglich, Evelyn Marie

    2000-01-01T23:59:59.000Z

    coefficient (k) in cotton (Gossypium hirsutum). Treatments consisted of four row spacings (0.19-m, 0.38-m, 0.76-m, and 1.00-m) and four plant densities [148, 222, 296, 445 (1998) and 371 (1999) thousand plants ha-1] with each treatment replicated three times...

  10. Japan may take nuclear option in fusion row By David Pilling in Tokyo

    E-Print Network [OSTI]

    Japan may take nuclear option in fusion row By David Pilling in Tokyo Published: November 20 2004 the joint project, Japan's chief negotiator has warned. The European Union says it has the financial and scientific clout to build and run a reactor in France, without Japan's support. Tokyo says it will fund more

  11. Detecting and Defending against Web-Server Fingerprinting Dustin Lee, Jeff Rowe, Calvin Ko, Karl Levitt

    E-Print Network [OSTI]

    California at Davis, University of

    Detecting and Defending against Web-Server Fingerprinting Dustin Lee, Jeff Rowe, Calvin Ko, Karl of web servers and suggests possible defenses to the probing activity. General concepts of finger- printing and their application to the identification of Web servers, even where server information has been

  12. Shelley J. Row, P.E., PTOE Director, ITS Joint Program Office

    E-Print Network [OSTI]

    Minnesota, University of

    since January 2007. As JPO Director, Ms. Row manages a $110 million annual budget to advance research in FHWA's Headquarters managing ITS Early Deployment Planning and Outreach, Shelley returned to the field as Engineering Systems Manager in the Georgia Division office, where she was responsible for ITS project

  13. First-row hydrides: Dissociation and ground state energies using quantum Monte Carlo

    E-Print Network [OSTI]

    Anderson, James B.

    First-row hydrides: Dissociation and ground state energies using quantum Monte Carlo Arne Lu, Pennsylvania 16802 Received 20 May 1996; accepted 24 July 1996 Accurate ground state energies comparable FN-DQMC method. The residual energy, the nodal error due to the error in the nodal structure

  14. MOVEMENT OF FEMALE WHITE-TAILED DEER: EFFECTS OF CLIMATE AND INTENSIVE ROW-CROP AGRICULTURE

    E-Print Network [OSTI]

    1099 MOVEMENT OF FEMALE WHITE-TAILED DEER: EFFECTS OF CLIMATE AND INTENSIVE ROW-CROP AGRICULTURE in intensively (>80%) cultivated areas. From January 2001 to August 2002, we monitored movements of 77 (61 adult of seasonal migration, whereas crop emergence and harvest had minimal effects. Four deer (8%) dispersed a mean

  15. An Economic Comparison of Conventional and Narrow-Row Cotton Production--Southern Plains of Texas.

    E-Print Network [OSTI]

    Young, Kenneth B.; Adams, James R.

    1977-01-01T23:59:59.000Z

    JUN ~ 3 1977 Texas A&M University June 19' An Economic Comparison of Coventional and Narrow-Row -- Cotton Production-Southern High Plains of Texas The Texas Agricultural Experiment Station, J. E. Miller, Director' The Texas A&M University.... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4 Yield Comparisons .......................................... 4 Differences in Inputs Used ............... :................... 6 Fertil izer and Irrigation Inputs . . .......................... 6 Seeding rate...

  16. Tailored Macroporous SiCN and SiC Structures for High-Temperature Fuel Reforming**

    E-Print Network [OSTI]

    Kenis, Paul J. A.

    Tailored Macroporous SiCN and SiC Structures for High-Temperature Fuel Reforming** By In-Kyung Sung such as the reforming of hydrocarbon fuels (e.g., die- sel or JP-8) into hydrogen for use in portable power sources the reaction rate of endothermic reactions (such as the steam reforming of hydrocarbons), at the macroscale

  17. Irradiated cubic single crystal SiC as a high temperature sensor Alex A. Volinsky

    E-Print Network [OSTI]

    Volinsky, Alex A.

    flux on the order of 21020 neutrons/cm2 at 0.18 MeV causes over 3% volume lattice expansion. Radiation-ray diffractometry, and heat-transfer. 3 irradiation interacts with SiC primarily by scattering off nuclei, an event, which, in turn, will complicate lattice parameter measurements. Neutron ly imparts energy and momentum

  18. Environmental effects on creep and stress-rupture properties of advanced SiC fibers

    SciTech Connect (OSTI)

    Yun, H.M. [Cleveland State Univ., OH (United States); Goldsby, J.C.; DiCarlo, J.A. [NASA Lewis Research Center, Cleveland, OH (United States)

    1995-12-01T23:59:59.000Z

    Small diameter polycrystalline SiC fibers are of high technical interest for reinforcement of ceramic matrix composites. These fibers have high room temperature stiffness and strength, and the potential for retaining these properties in oxidizing environments up to 1400{degrees}C. However, with current SiC fibers, it has been observed that the influence of environment on the high temperature creep and rupture behavior of individual fibers can be very complex. For example, Bodet et al. reported better creep resistance of ceramic grade Nicalon fiber in a controlled CO environment than in argon. Yun et al. reported better rupture resistance of Nicalon and Hi-Nicalon in air than in vacuum. Rugg reported better rupture resistance of the Carborundum fiber in nitrogen than in air. In general, in comparison to inert conditions, testing in oxygen can increase or decrease fiber creep resistance, while having similar or opposite effects on rupture resistance. These effects can vary significantly with stress, temperature, and the SiC fiber grain boundary structure, second phase and impurity compositions, stoichiometry, as well as open porosity. As an initial step to better understand these factors, the objectives of this study were (1) to measure the effects of air and argon environments on the creep and rupture behavior of various advanced SiC fibers, (2) to determine whether these effects can be correlated among the fiber types, and (3) to suggest probable sources for these effects based on microstructural mechanisms.

  19. Si-C interactions during degradation of the diatom Skeletonema1 Brivala Moriceau1

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Copernic, 29280 Plouzané,14 France15 16 17 Running title: Si-C interactions during diatom degradation 18 Universitaire Européen de la Mer (IUEM)21 Technopole Brest Iroise22 6 place Nicolas Copernic23 24 Tel: (00 33

  20. Topology of charge density and elastic properties of Ti3SiC2 polymorphs

    SciTech Connect (OSTI)

    Yu, Rong; Zhang, Xiao Feng; He, Lian Long; Ye, Heng Qiang

    2004-06-24T23:59:59.000Z

    Using an all-electron, full potential first-principles method, we have investigated the topology of charge density and elastic properties of the two polymorphs, alpha and beta, of Ti3SiC2. The bonding effect was analyzed based on Bader's quantum theory of ''atoms in molecules'' (AIM). It was found that the Ti-Si bonding effect is significantly weaker in beta than in alpha, giving less stabilizing effect for beta. The Si-C bonds, which are absent in alpha, are formed in beta and provide additional stabilizing effect for beta. In contrast to conventional thinking, there is no direction interaction between Ti atoms in both alpha and beta. The calculated elastic properties are in good agreement with the experimental results, giving the bulk modulus of about 180 GPa and the Poisson's ratio of 0.2. The beta phase is generally softer than the alpha phase. As revealed by the direction dependent Young's modulus, there is only slight elastic anisotropy in Ti3SiC2. For alpha, Young's modulus is minimum in the c direction and maximum in the directions 42o from c. For beta, the maximum lies in the c direction, in part due to the formation of Si-C bonds in this direction.

  1. The correlation of epitaxial graphene properties and morphology of SiC (0001)

    SciTech Connect (OSTI)

    Guo, Y.; Guo, L. W., E-mail: lwguo@iphy.ac.cn, E-mail: xlchen@iphy.ac.cn; Huang, J.; Jia, Y. P.; Lin, J. J.; Lu, W.; Li, Z. L. [Research and Development Center for Functional Crystals, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China); Yang, R. [Nanoscale Physics and Devices Laboratory, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China); Chen, X. L., E-mail: lwguo@iphy.ac.cn, E-mail: xlchen@iphy.ac.cn [Research and Development Center for Functional Crystals, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China); Collaborative Innovation Center of Quantum Matter, Beijing 100190 (China)

    2014-01-28T23:59:59.000Z

    The electronic properties of epitaxial graphene (EG) on SiC (0001) depend sensitively on the surface morphology of SiC substrate. Here, 23 layers of graphene were grown on on-axis 6H-SiC with different step densities realized through controlling growth temperature and ambient pressure. We show that epitaxial graphene on SiC (0001) with low step density and straight step edge possesses fewer point defects laying mostly on step edges and higher carrier mobility. A relationship between step density and EG mobility is established. The linear scan of Raman spectra combined with the atomic force microscopy morphology images revealed that the Raman fingerprint peaks are nearly the same on terraces, but shift significantly while cross step edges, suggesting the graphene is not homogeneous in strain and carrier concentration over terraces and step edges of substrates. Thus, control morphology of epitaxial graphene on SiC (0001) is a simple and effective method to pursue optimal route for high quality graphene and will be helpful to prepare wafer sized graphene for device applications.

  2. On He bubbles in neutron irradiated SYLRAMIC type SiC fibers

    SciTech Connect (OSTI)

    Gelles, David S.; Youngblood, Gerald E.

    2006-03-01T23:59:59.000Z

    SylramicTM type SiC fibers, which contain at least 2.3 wt% B, were examined by TEM following neutron irradiation to dose levels of ~7 dpa in HFIR at 800C and to ~1 dpa in ATR at 1090C. At these radiation damage dose levels, transmutation of the boron-10 component effectively dopes the Sylramic? type fibers with up to 10,000 appm helium. Following irradiation at 800C, bubble development was too fine to resolve even by high resolution TEM. However, following irradiation at 1090C helium bubble development was resolvable, but complex. A fine dispersion of 1-nm bubbles was observed within the SiC grains and a coarse, non-uniform distribution of irregular 25-nm bubbles was observed on grain boundaries. In addition, some unusual arrays of planar 2.5-nm thick bubbles were observed in the SiC grains and equiaxed bubbles were observed in the boride precipitate particles contained within the fiber microstructure. Not unexpectedly, helium retention and bubble formation in ?-SiC depends on details of the polycrystalline microstructure as well as the irradiation conditions.

  3. A Parametric Device Study for SiC Power Electronics Burak Ozpineci

    E-Print Network [OSTI]

    Tolbert, Leon M.

    A Parametric Device Study for SiC Power Electronics Burak Ozpineci 1,3 burak@ieee.org Leon M to be used. The circuits people, including power electronics researchers, take the devices as black boxes Typically, power electronics researchers have to choose off-the-shelf power devices with the specifications

  4. Emission of terahertz radiation from SiC Jared H. Strait,a

    E-Print Network [OSTI]

    Afshari, Ehsan

    for the generation of terahertz radiation. The nonlinear optical properties of various SiC polytypes have been previ the terahertz radiation dependence on the optical pump polarization, the pump angle of incidence, and the pump for terahertz emission. Given its material hard- ness, high optical damage threshold, small optical losses

  5. SiC MODIFICATIONS TO MELCOR FOR SEVERE ACCIDENT ANALYSIS APPLICATIONS

    SciTech Connect (OSTI)

    Brad J. Merrill; Shannon M Bragg-Sitton

    2013-09-01T23:59:59.000Z

    The Department of Energy (DOE) Office of Nuclear Energy (NE) Light Water Reactor (LWR) Sustainability Program encompasses strategic research focused on improving reactor core economics and safety margins through the development of an advanced fuel cladding system. The Fuels Pathway within this program focuses on fuel system components outside of the fuel pellet, allowing for alteration of the existing zirconium-based clad system through coatings, addition of ceramic sleeves, or complete replacement (e.g. fully ceramic cladding). The DOE-NE Fuel Cycle Research & Development (FCRD) Advanced Fuels Campaign (AFC) is also conducting research on materials for advanced, accident tolerant fuels and cladding for application in operating LWRs. To aide in this assessment, a silicon carbide (SiC) version of the MELCOR code was developed by substituting SiC in place of Zircaloy in MELCORs reactor core oxidation and material property routines. The purpose of this development effort is to provide a numerical capability for estimating the safety advantages of replacing Zr-alloy components in LWRs with SiC components. This modified version of the MELCOR code was applied to the Three Mile Island (TMI-2) plant accident. While the results are considered preliminary, SiC cladding showed a dramatic safety advantage over Zircaloy cladding during this accident.

  6. AUSTRALIAN. N~TIONAL UNIVE~SITY DEPARTMENTO:miNUCLEAR PFf-y'SICS

    E-Print Network [OSTI]

    Chen, Ying

    AUSTRALIAN. N~TIONAL UNIVE~SITY DEPARTMENTO:miNUCLEAR PFf-y'SICS 14UD TANK OPENING REPORT/iNo. 51 functions for which it provides power. An order was . immediately placed with N.E.C. for 28 perspex bars microamp hours of b.d.p. generation than its predicted lifetime. In preparation for the next opening

  7. Isotopic Ratios of SiC of Type X and Si 3 This appendix contains the isotopic data for 81 presolar SiC grains of type X and six preso

    E-Print Network [OSTI]

    Nittler, Larry R.

    for 81 presolar SiC grains of type X and six preso­ lar Si 3 N 4 grains, all found by ion imaging (see C 14 N/ 15 N CN \\Gamma /C \\Gamma 26 Al/ 27 Al KJG6L­103­1 SiC ­420 \\Sigma 4 ­480 \\Sigma 8 40.4 +0:7 \\Gamma0:7 55.3 +3:1 \\Gamma2:8 0.124 \\Delta \\Delta \\Delta KJG6L­105­1 SiC ­277 \\Sigma 11 ­404 \\Sigma 9 289

  8. In Situ Generation of Few-Layer Graphene Coatings on SnO2-SiC...

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

    In Situ Generation of Few-Layer Graphene Coatings on SnO2-SiC Core-Shell Nanoparticles for High-Performance Lithium-Ion Storage. In Situ Generation of Few-Layer Graphene Coatings...

  9. Distribution of Pd, Ag & U in the SiC Layer of an Irradiated TRISO Fuel Particle

    SciTech Connect (OSTI)

    Thomas M. Lillo; Isabella J. van Rooyen

    2014-08-01T23:59:59.000Z

    The distribution of silver, uranium and palladium in the silicon carbide (SiC) layer of an irradiated TRISO fuel particle was studied using samples extracted from the SiC layer using focused ion beam (FIB) techniques. Transmission electron microscopy in conjunction with energy dispersive x-ray spectroscopy was used to identify the presence of the specific elements of interest at grain boundaries, triple junctions and precipitates in the interior of SiC grains. Details on sample fabrication, errors associated with measurements of elemental migration distances and the distances migrated by silver, palladium and uranium in the SiC layer of an irradiated TRISO particle from the AGR-1 program are reported.

  10. Growth of GaN on porous SiC and GaN substrates C. K. Inoki1

    E-Print Network [OSTI]

    Feenstra, Randall

    1 Growth of GaN on porous SiC and GaN substrates C. K. Inoki1 , T. S. Kuan1 , Ashutosh Sagar2 , C, Albuquerque, NM 87185 4 Beckman Institute, University of Illinois, Urbana, IL 61801 GaN films were grown on porous SiC and GaN templates using both plasma-assisted molecular beam epitaxy (PAMBE) and metal

  11. Fabrication of a single layer graphene by copper intercalation on a SiC(0001) surface

    SciTech Connect (OSTI)

    Yagyu, Kazuma; Tochihara, Hiroshi; Tomokage, Hajime; Suzuki, Takayuki [Department of Electronics Engineering and Computer Science, Fukuoka University, Fukuoka 814-0180 (Japan); Tajiri, Takayuki; Kohno, Atsushi [Department of Applied Physics, Fukuoka University, Fukuoka 814-0180 (Japan); Takahashi, Kazutoshi [Synchrotron Light Application Center, Saga University, 1 Honjo, Saga 840-8502 (Japan)

    2014-02-03T23:59:59.000Z

    Cu atoms deposited on a zero layer graphene grown on a SiC(0001) substrate, intercalate between the zero layer graphene and the SiC substrate after the thermal annealing above 600?C, forming a Cu-intercalated single layer graphene. On the Cu-intercalated single layer graphene, a graphene lattice with superstructure due to moir pattern is observed by scanning tunneling microscopy, and specific linear dispersion at the K{sup } point as well as a characteristic peak in a C{sub 1s} core level spectrum, which is originated from a free-standing graphene, is confirmed by photoemission spectroscopy. The Cu-intercalated single layer graphene is found to be n-doped.

  12. Electrochemical study of SiC particle occlusion during nickel electrodeposition

    SciTech Connect (OSTI)

    Watson, S.W. (Bureau of Mines, Albany, OR (United States))

    1993-08-01T23:59:59.000Z

    Previous, published work conducted by the Bureau of Mines showed that chromium particle occlusion occurs as a result of particle collisions with the cathode surface. Conductive chromium particles within the electric field were also shown to cause a local rise in the cathodic current density on the area immediately adjacent to that particle. In order to research the effect of conductive particles vs. semiconductive particles on the occlusion process, nickel electrodeposition was studied in the presence of SiC particles and compared to previous studies on nickel electrodeposition in the presence and absence of Cr particles. The effect of semiconductive SiC particles on nickel electrodeposition was to catalyze the formation of H[sub ads] as well as Ni[sub ads][sup +] intermediates. Evidence of a H[sub ads] intermediate was obtained by current efficiency studies of Ni electrodeposition as well as X-ray diffraction and hydrogen analyses of the coatings made during electrodeposition.

  13. Investigation of interlayer materials for the microwave joining of SiC

    SciTech Connect (OSTI)

    Silberglitt, R.; Palaith, D. (Technology Assessment and Transfer, Inc., Annapolis, MD (USA)); Black, W.M.; Sa'adaldin, H.S. (George Mason Univ., Fairfax, VA (USA)); Katz, J.D.; Blake, R.D. (Los Alamos National Lab., NM (USA))

    1991-01-01T23:59:59.000Z

    Microwave joining of ceramics has the potential for increased speed and convenience. Joints have been made in alumina, mullite and silicon nitride with flexure strength approaching, and in some cases exceeding, that of the as received material in a fraction of the time that is customarily required with conventional techniques. This paper describes the initial results of investigations aimed at applying microwave joining to SiC and other carbide ceramics. 8 refs., 5 figs.

  14. Controlled synthesis and decoupling of monolayer graphene on SiC(0001)

    SciTech Connect (OSTI)

    Oida, S.; Hannon, J. B.; Tromp, R. M. [IBM Research Division, T.J. Watson Research Center, Yorktown Heights, New York 10598 (United States)

    2014-04-21T23:59:59.000Z

    We describe a process for the growth of a single, electronically decoupled graphene layer on SiC(0001). The method involves annealing in disilane to (1) prepare flat, clean substrates, (2) grow a single graphene layer, and (3) electronically decouple the graphene from the substrate. This approach uses a single process gas, at ?Torr pressures, with modest substrate temperatures, thus affecting a drastic simplification over other processes described in the literature.

  15. Tuning carrier density across Dirac point in epitaxial graphene on SiC by corona discharge

    SciTech Connect (OSTI)

    Lartsev, Arseniy; Yager, Tom; Lara-Avila, Samuel, E-mail: samuel.lara@chalmers.se; Kubatkin, Sergey [Department of Microtechnology and Nanoscience, Chalmers University of Technology, S-41296 Gteborg (Sweden); Bergsten, Tobias [SP Technical Research Institute of Sweden, S-50115 Bors (Sweden); Tzalenchuk, Alexander [National Physical Laboratory, Teddington TW110LW (United Kingdom); Royal Holloway, University of London, Egham TW20 0EX (United Kingdom); Janssen, T. J. B. M [National Physical Laboratory, Teddington TW110LW (United Kingdom); Yakimova, Rositza [Department of Physics, Chemistry and Biology (IFM), Linkping University, S-58183 Linkping (Sweden)

    2014-08-11T23:59:59.000Z

    We demonstrate reversible carrier density control across the Dirac point (?n???10{sup 13?}cm{sup ?2}) in epitaxial graphene on SiC (SiC/G) via high electrostatic potential gating with ions produced by corona discharge. The method is attractive for applications where graphene with a fixed carrier density is needed, such as quantum metrology, and more generally as a simple method of gating 2DEGs formed at semiconductor interfaces and in topological insulators.

  16. Oxidation of SiC investigated by ellipsometry and Rutherford backscattering spectrometry

    SciTech Connect (OSTI)

    Szilagyi, E. [KFKI Research Institute for Particle and Nuclear Physics, P.O. Box 49, H-1525 Budapest (Hungary); Petrik, P.; Lohner, T.; Koos, A. A.; Fried, M.; Battistig, G. [Research Institute for Technical Physics and Materials Science, P.O. Box 49, H-1525 Budapest (Hungary)

    2008-07-01T23:59:59.000Z

    Oxidation of SiC was performed in Ar-O{sub 2} mixture of atmospheric pressure at 1100 deg. C and compared with that of Si. The partial pressure of O{sub 2} varied from 100 to 1000 mbar, while the oxidation time ranged from 0.5 to 45 h. The thickness of the oxide films was determined by spectroscopic ellipsometry and Rutherford backscattering spectrometry. The time and the pressure dependence of the oxidation kinetics of SiC are well described by the modified Deal-Grove model. In the diffusion-limited region, even for the faster case, the oxidation kinetics of the C-terminated face of SiC is not clearly limited by oxygen indiffusion, as for pure silicon. To interpret the ellipsometry spectra, two models of possible structure were used. In the case of the one-layer model, for layer thicknesses above 30 nm, the refractive index of the oxide layers is identical to that of thermally oxidized Si, and it increases rapidly with decreasing thickness below about 15 nm. This increase is significantly larger for C-terminated than for Si-terminated faces, and this difference can be explained by a transition layer introduced into the two-layer model. This model contains a pure SiO{sub 2} layer and a transition layer modeled by a mixture of 50 % SiO{sub 2} and 50 % SiC. The transition layer is thicker on the C-terminated surface than on the Si-terminated one. The thickness ratio of the transition layers is slightly larger than the surface roughness ratio on the two different sides determined by atomic force microscopy. The density of the oxide films, which can be determined from the backscattering and spectroscopic ellipsometry spectra, decreases with decreasing thickness below about 30 nm. For thicker films, the density of the oxide is equal to the bulk density of SiO{sub 2}.

  17. Creep behavior in SiC whisker-reinforced alumina composite

    SciTech Connect (OSTI)

    Lin, H.T.; Becher, P.F. [Oak Ridge National Lab., TN (United States). Metals and Ceramics Div.

    1994-10-01T23:59:59.000Z

    Grain boundary sliding (often accompanied by cavitation) is a major contributor to compressive and tensile creep deformation in fine-grained aluminas, both with and without whisker-reinforcement. Studies indicate that the creep response of alumina composites reinforced with SiC whiskers can be tailored by controlling the composite microstructure and composition. The addition of SiC whiskers (< 30 vol%) significantly increases the creep resistance of fine-grained (1--2 {mu}m) alumina in air at temperatures of 1,200 and 1,300 C. However, at higher whisker contents (30 and 50 vol%), the creep resistance is degraded due to enhanced surface oxidation reactions accompanied by extensive creep cavitation. Densification aids (i.e., Y{sub 2}O{sub 3}), which facilitate silica glass formation and thus liquid phase densification of the composites, can also result in degradation of creep resistance. On the other hand, increasing the matrix grain size or decreasing the whisker aspect ratio (increased whisker number density) results in raising the creep resistance of the composites. These observations not only explain the variability in the creep response of various SiC whisker-reinforced alumina composites but also indicate factors that can be used to enhance the elevated temperature performance.

  18. Data Sharing Report Characterization of Isotope Row Facilities Oak Ridge National Laboratory Oak Ridge TN

    SciTech Connect (OSTI)

    Weaver, Phyllis C

    2013-12-12T23:59:59.000Z

    The U.S. Department of Energy (DOE) Oak Ridge Office of Environmental Management (EM-OR) requested that Oak Ridge Associated Universities (ORAU), working under the Oak Ridge Institute for Science and Education (ORISE) contract, provide technical and independent waste management planning support using funds provided by the American Recovery and Reinvestment Act (ARRA). Specifically, DOE EM-OR requested ORAU to plan and implement a survey approach, focused on characterizing the Isotope Row Facilities located at the Oak Ridge National Laboratory (ORNL) for future determination of an appropriate disposition pathway for building debris and systems, should the buildings be demolished. The characterization effort was designed to identify and quantify radiological and chemical contamination associated with building structures and process systems. The Isotope Row Facilities discussed in this report include Bldgs. 3030, 3031, 3032, 3033, 3033A, 3034, 3036, 3093, and 3118, and are located in the northeast quadrant of the main ORNL campus area, between Hillside and Central Avenues. Construction of the isotope production facilities was initiated in the late 1940s, with the exception of Bldgs. 3033A and 3118, which were enclosed in the early 1960s. The Isotope Row facilities were intended for the purpose of light industrial use for the processing, assemblage, and storage of radionuclides used for a variety of applications (ORNL 1952 and ORAU 2013). The Isotope Row Facilities provided laboratory and support services as part of the Isotopes Production and Distribution Program until 1989 when DOE mandated their shutdown (ORNL 1990). These facilities performed diverse research and developmental experiments in support of isotopes production. As a result of the many years of operations, various projects, and final cessation of operations, production was followed by inclusion into the surveillance and maintenance (S&M) project for eventual decontamination and decommissioning (D&D). The process for D&D and final dismantlement of facilities requires that the known contaminants of concern (COCs) be evaluated and quantified and to identify and quantify any additional contaminants in order to satisfy the waste acceptance criteria requirements for the desired disposal pathway. Known facility contaminants include, but are not limited to, asbestos-containing material (ACM), radiological contaminants, and chemical contaminants including polychlorinated biphenyls (PCBs) and metals.

  19. Effects of plant density and row spacing on the ratooning of sorghum (Sorghum bicolor (L.) Moench)

    E-Print Network [OSTI]

    Priwin A., Ricardo A

    1977-01-01T23:59:59.000Z

    and Row Width Sorghum, as all other crops, requires optimum spacing for efficient utilization of nutrients, solar energy and soil moisture. The effect of optimum spacing can be measured by the components which make up yield per unit area and per plant.... If the stand was not adequate, plants were trans- planted to insure a correct stand. The parent and ratoon crops were cultivated to maintain the plots free of weedy species. 20 After harvesting the grain from the parent crop, the plants were cut 8 cm...

  20. File:03AKBRightOfWaysROWs.pdf | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual1WAALandUsePlanning.pdf Jump to: navigation, search FileAKBRightOfWaysROWs.pdf Jump to:

  1. Effect of re-melting on particle distribution and interface formation in SiC reinforced 2124Al matrix composite

    SciTech Connect (OSTI)

    Mandal, Durbadal, E-mail: durbadal73@yahoo.co.in [MEF Division, CSIR-National Metallurgical Laboratory, Jamshedpur 831007 (India); Viswanathan, Srinath [Dept of Metallurgical and Materials Engineering, University of Alabama, Tuscaloosa, AL (United States)

    2013-12-15T23:59:59.000Z

    The interface between metal matrix and ceramic reinforcement particles plays an important role in improving properties of the metal matrix composites. Hence, it is important to find out the interface structure of composite after re-melting. In the present investigation, the 2124Al matrix with 10 wt.% SiC particle reinforced composite was re-melted at 800 C and 900 C for 10 min followed by pouring into a permanent mould. The microstructures reveal that the SiC particles are distributed throughout the Al-matrix. The volume fraction of SiC particles varies from top to bottom of the composite plate and the difference increases with the decrease of re-melting temperature. The interfacial structure of re-melted 2124Al10 wt.%SiC composite was investigated using scanning electron microscopy, an electron probe micro-analyzer, a scanning transmission electron detector fitted with scanning electron microscopy and an X-ray energy dispersive spectrometer. It is found that a thick layer of reaction product is formed at the interface of composite after re-melting. The experimental results show that the reaction products at the interface are associated with high concentration of Cu, Mg, Si and C. At re-melting temperature, liquid Al reacts with SiC to form Al{sub 4}C{sub 3} and AlSi eutectic phase or elemental Si at the interface. High concentration of Si at the interface indicates that SiC is dissociated during re-melting. The X-ray energy dispersive spectrometer analyses confirm that Mg- and Cu-enrich phases are formed at the interface region. The Mg is segregated at the interface region and formed MgAl{sub 2}O{sub 4} in the presence of oxygen. The several elements identified at the interface region indicate that different types of interfaces are formed in between Al matrix and SiC particles. The AlSi eutectic phase is formed around SiC particles during re-melting which restricts the SiC dissolution. - Highlights: Re-melted composite shows homogeneous particle distribution Thick reaction products are observed at the interface Carbide is identified at interface due to SiC dissolution at high temperature Reaction products are also Si enrich phase Mg and Cu segregated and formed MgAl{sub 2}O{sub 4}, CuMgAl{sub 2} phase at grain boundary.

  2. Abundances of presolar graphite and SiC from supernovae and AGB stars in the Murchison meteorite

    SciTech Connect (OSTI)

    Amari, Sachiko; Zinner, Ernst [McDonnell Center for the Space Sciences and the Physics Department, Washington University, One Brookings Dr., St. Louis, MO 63130 (United States); Gallino, Roberto [Dipartimento di Fisica, Universit di Torino, Via P. Giuria 1, I-10125 Torino (Italy)

    2014-05-02T23:59:59.000Z

    Pesolar graphite grains exhibit a range of densities (1.65 2.20 g/cm{sup 3}). We investigated abundances of presolar graphite grains formed in supernovae and in asymptotic giant branch (AGB) stars in the four density fractions KE3, KFA1, KFB1 and KFC1 extracted from the Murchison meteorite to probe dust productions in these stellar sources. Seventy-six and 50% of the grains in the low-density fractions KE3 and KFA1, respectively, are supernova grains, while only 7.2% and 0.9% of the grains in the high-density fractions KFB1 and KFC1 have a supernova origin. Grains of AGB star origin are concentrated in the high-density fractions KFB1 and KFC1. From the C isotopic distributions of these fractions and the presence of s-process Kr with {sup 86}Kr/{sup 82}Kr?=?4.430.46 in KFC1, we estimate that 76% and 80% of the grains in KFB1 and KFC1, respectively, formed in AGB stars. From the abundance of graphite grains in the Murchison meteorite, 0.88 ppm, the abundances of graphite from supernovae and AGB stars are 0.24 ppm and 0.44 ppm, respectively: the abundances of graphite in supernovae and AGB stars are comparable. In contrast, it has been known that 1% of SiC grains formed in supernovae and 95% formed in AGB stars in meteorites. Since the abundance of SiC grains is 5.85 ppm in the Murchison meteorite, the abundances of SiC from supernovae and AGB stars are 0.063 ppm and 5.6 ppm, respectively: the dominant source of SiC grains is AGB stars. Since SiC grains are harder and likely to survive better in space than graphite grains, the abundance of supernova graphite grains, which is higher than that of supernova SiC grains, indicates that supernovae proficiently produce graphite grains. Graphite grains from AGB stars are, in contrast, less abundant that SiC grains from AGB stars (0.44 ppm vs. 5.6 ppm). It is difficult to derive firm conclusions for graphite and SiC formation in AGB stars due to the difference in susceptibility to grain destruction. Metallicity of the parent AGB stars of graphite grains is much lower than that of SiC grains and the difference in metallicity might also have affected to the difference in the abundances in the Murchison meteorite.

  3. Bootstrapping dielectronic recombination from second-row elements and the Orion Nebula

    E-Print Network [OSTI]

    Badnell, N R; Gorczyca, T W; Nikolic, D; Wagle, G A

    2015-01-01T23:59:59.000Z

    Dielectronic recombination (DR) is the dominant recombination process for most heavy elements in photoionized clouds. Accurate DR rates for a species can be predicted when the positions of autoionizing states are known. Unfortunately such data are not available for most third and higher-row elements. This introduces an uncertainty that is especially acute for photoionized clouds, where the low temperatures mean that DR occurs energetically through very low-lying autoionizing states. This paper discusses S$^{2+} \\rightarrow$ S$^+$ DR, the process that is largely responsible for establishing the [S~III]/[S~II] ratio in nebulae. We derive an empirical rate coefficient using a novel method for second-row ions, which do have accurate data. Photoionization models are used to reproduce the [O~III] / [O~II] / [O~I] / [Ne~III] intensity ratios in central regions of the Orion Nebula. O and Ne have accurate atomic data and can be used to derive an empirical S$^{2+} \\rightarrow$ S$^+$ DR rate coefficient at $\\sim 10^{4}$...

  4. Lifetime Response of a Hi-Nicalon Fiber-Reinforced Melt-Infiltrated SiC Matrix Composites

    SciTech Connect (OSTI)

    Becher, P.F.; Lin, H.T.; Singh, M.

    1999-04-25T23:59:59.000Z

    Lifetime studies in four-point flexure were performed on a Hi-NicalonTM fiber-reinforced SiC matrix composite over a temperature range of 700 degrees to 1150 degrees C in air. The composite consisted of ~40 vol. % Hi-NicalonTM fiber (8-harness weave) with a 0.5 Mu-m BN fiber coating and a melt-infiltration SiC matrix wand was tested with as-machined surfaces. Lifetime results indicated that the composite exhibited a stress-dependent lifetime at stress levels above an apparent fatigue limit, similar to the trend observed in CG-NicalonTM fiber reinforced CVI SiC matrix composites. At less than or equal to 950 degrees C, the lifetimes of Hi-Nicalon/MI SiC composites decreased with increasing applied stress level and test temperature. However, the lifetimes were extended as test temperature increased from 950 degees to 1150 degrees C as a result of surface crack sealing due to glass formation by the oxidation of Mi SiC matrix. The lifetime governing processes were, in general, attributed to the progressive oxidation of BN fiber coating and formation of glassy phase, which formed a strong bond between fiber and matrix, resulting in embrittlement of the composite with time.

  5. Step-edge-induced resistance anisotropy in quasi-free-standing bilayer chemical vapor deposition graphene on SiC

    SciTech Connect (OSTI)

    Ciuk, Tymoteusz [Institute of Electronic Materials Technology, Wolczynska 133, 01-919 Warsaw (Poland); Institute of Microelectronics and Optoelectronics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw (Poland); Cakmakyapan, Semih; Ozbay, Ekmel [Department of Electrical and Electronics Engineering, Department of Physics, Nanotechnology Research Center, Bilkent University, 06800 Bilkent, Ankara (Turkey); Caban, Piotr; Grodecki, Kacper; Pasternak, Iwona; Strupinski, Wlodek, E-mail: wlodek.strupinski@itme.edu.pl [Institute of Electronic Materials Technology, Wolczynska 133, 01-919 Warsaw (Poland); Krajewska, Aleksandra [Institute of Electronic Materials Technology, Wolczynska 133, 01-919 Warsaw (Poland); Institute of Optoelectronics, Military University of Technology, Gen. S. Kaliskiego 2, 00-908 Warsaw (Poland); Szmidt, Jan [Institute of Microelectronics and Optoelectronics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw (Poland)

    2014-09-28T23:59:59.000Z

    The transport properties of quasi-free-standing (QFS) bilayer graphene on SiC depend on a range of scattering mechanisms. Most of them are isotropic in nature. However, the SiC substrate morphology marked by a distinctive pattern of the terraces gives rise to an anisotropy in graphene's sheet resistance, which may be considered an additional scattering mechanism. At a technological level, the growth-preceding in situ etching of the SiC surface promotes step bunching which results in macro steps ~10 nm in height. In this report, we study the qualitative and quantitative effects of SiC steps edges on the resistance of epitaxial graphene grown by chemical vapor deposition. We experimentally determine the value of step edge resistivity in hydrogen-intercalated QFS-bilayer graphene to be ~190 ??m for step height hS = 10 nm and provide proof that it cannot originate from mechanical deformation of graphene but is likely to arise from lowered carrier concentration in the step area. Our results are confronted with the previously reported values of the step edge resistivity in monolayer graphene over SiC atomic steps. In our analysis, we focus on large-scale, statistical properties to foster the scalable technology of industrial graphene for electronics and sensor applications.

  6. Thermomechanical Performance of Si-Ti-C-O and Sintered SiC Fiber-Bonded Ceramics at High Temperatures

    SciTech Connect (OSTI)

    Matsunaga, Tadashi [ORNL; Lin, Hua-Tay [ORNL; Singh, Mrityunjay [NASA-Glenn Research Center, Cleveland; Kajii, Shinji [Ube Industries, Ltd.; Matsunaga, Kenji [Ube Industries, Ltd.; Ishikawa, Toshihiro [Ube Industries, Ltd.

    2011-01-01T23:59:59.000Z

    The stress-temperature-lifetime response of Si-Ti-C-O fiber-bonded ceramic (Tyrannohex ) and sintered SiC fiber-bonded ceramic (SA-Tyrannohex ) materials were investigated in air from 500 to 1150 C and 500 to 1400 C, respectively. The apparent threshold stress of Si-Ti-C-O fiber-bonded ceramic was about 175 MPa in the 500-1150 C temperature range. When the applied stress of the sintered SiC fiber-bonded ceramic was below an apparent threshold stress (e.g., ~225MPa) for tests conducted 1150 C, no failures were observed for lifetimes up to 1000h. In the case of sintered SiC fiber-bonded ceramic, at the temperature of 1300 C, the apparent threshold stress decreased to 175 MPa. The decrease in strength seemed to be caused by grain growth which was confirmed from the SEM fractography. Both fiber-bonded ceramics exhibited much higher durability than a commercial SiC/SiC composite at temperatures above 500 C. In addition, results suggested that the sintered SiC fiber-bonded ceramic (SA-Tyrannohex) is more stable than a Hi-Nicalon/MI SiC composite with BN/SiC fiber coating at temperatures above 1300 C.

  7. Hydrogenated Bilayer Wurtzite SiC Nanofilms: A Two-Dimensional Bipolar Magnetic Semiconductor Material

    E-Print Network [OSTI]

    Yuan, Long; Yang, Jinlong

    2012-01-01T23:59:59.000Z

    Recently, a new kind of spintronics materials, bipolar magnetic semiconductor (BMS), has been proposed. The spin polarization of BMS can be conveniently controlled by a gate voltage, which makes it very attractive in device engineering. Now, the main challenge is finding more BMS materials. In this article, we propose that hydrogenated wurtzite SiC nanofilm is a two-dimensional BMS material. Its BMS character is very robust under the effect of strain, substrate, or even a strong electric field. The proposed two-dimensional BMS material paves the way to use this promising new material in an integrated circuit.

  8. Formation of Graphene on SiC( 1000 ) Surfaces in Disilane and Neon Environments Guowei He, N. Srivastava, R. M. Feenstra*

    E-Print Network [OSTI]

    Feenstra, Randall

    , for which we employed rapid transfer of the sample between our graphene preparation system1 Formation of Graphene on SiC( 1000 ) Surfaces in Disilane and Neon Environments Guowei He, N The formation of graphene on the SiC( 1000 ) surface (the C-face of the {0001} surfaces) has been studied

  9. 912 IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 47, NO. 2, MARCH/APRIL 2011 Impact of SiC Devices on Hybrid Electric and

    E-Print Network [OSTI]

    Tolbert, Leon M.

    ; in particular, the size of the battery bank can be reduced for optimum design. Index Terms--Efficiency, hybrid (SiC) devices as battery interface, motor controller, etc., in a hybrid electric vehicle (HEV][5]. The application of SiC devices (as battery interface, motor controller, etc.) in a HEV has merit because

  10. GROWTH OF GaN ON POROUS SiC AND GaN SUBSTRATES C. K. Inoki and T. S. Kuan

    E-Print Network [OSTI]

    Feenstra, Randall

    1 GROWTH OF GaN ON POROUS SiC AND GaN SUBSTRATES C. K. Inoki and T. S. Kuan Department of Physics Institute, University of Illinois, Urbana, IL 61801 ABSTRACT We have studied the growth of GaN on porous SiC and GaN substrates, employing both plasma-assisted molecular beam epitaxy (PAMBE) and metalorganic

  11. AlGaN/GaN HEMTs grown by Molecular Beam Epitaxy on sapphire, Sic, and HVPE GaN templates

    E-Print Network [OSTI]

    Manfra, Michael J.

    PS-4 AlGaN/GaN HEMTs grown by Molecular Beam Epitaxy on sapphire, Sic, and HVPE GaN templates Nils ABSTRACT Molecular Beam Epitaxy of GaN and related alloys is becoming a rival to the more established, and HVPE SI-GaN templates on sapphire. While sapphire and SI-Sic are established substrates for the growth

  12. Core design study of a supercritical light water reactor with double row fuel rods

    SciTech Connect (OSTI)

    Zhao, C.; Wu, H.; Cao, L.; Zheng, Y. [School of Nuclear Science and Technology, Xi'an Jiaotong Univ., No. 28, Xianning West Road, Xi'an, ShannXi, 710049 (China); Yang, J.; Zhang, Y. [China Nuclear Power Technology Research Inst., Yitian Road, ShenZhen, GuangDong, 518026 (China)

    2012-07-01T23:59:59.000Z

    An equilibrium core for supercritical light water reactor has been designed. A novel type of fuel assembly with dual rows of fuel rods between water rods is chosen and optimized to get more uniform assembly power distributions. Stainless steel is used for fuel rod cladding and structural material. Honeycomb structure filled with thermal isolation is introduced to reduce the usage of stainless steel and to keep moderator temperature below the pseudo critical temperature. Water flow scheme with ascending coolant flow in inner regions is carried out to achieve high outlet temperature. In order to enhance coolant outlet temperature, the radial power distributions needs to be as flat as possible through operation cycle. Fuel loading pattern and control rod pattern are optimized to flatten power distribution at inner regions. Axial fuel enrichment is divided into three parts to control axial power peak, which affects maximum cladding surface temperature. (authors)

  13. Structural consequences of hydrogen intercalation of epitaxial graphene on SiC(0001)

    SciTech Connect (OSTI)

    Emery, Jonathan D., E-mail: jdemery@anl.gov, E-mail: bedzyk@northwestern.edu; Johns, James E.; McBriarty, Martin E.; Hersam, Mark C. [Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208 (United States); Wheeler, Virginia H.; Kurt Gaskill, D. [U.S. Naval Research Laboratory, Washington, DC 20375 (United States); Detlefs, Blanka [ESRFThe European Synchrotron, CS 40220, 71, Avenue des Martyrs, 38043 Grenoble (France); Bedzyk, Michael J., E-mail: jdemery@anl.gov, E-mail: bedzyk@northwestern.edu [Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208 (United States); Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208 (United States)

    2014-10-20T23:59:59.000Z

    The intercalation of various atomic species, such as hydrogen, to the interface between epitaxial graphene (EG) and its SiC substrate is known to significantly influence the electronic properties of the graphene overlayers. Here, we use high-resolution X-ray reflectivity to investigate the structural consequences of the hydrogen intercalation process used in the formation of quasi-free-standing (QFS) EG/SiC(0001). We confirm that the interfacial layer is converted to a layer structurally indistinguishable from that of the overlying graphene layers. This newly formed graphene layer becomes decoupled from the SiC substrate and, along with the other graphene layers within the film, is vertically displaced by ?2.1?. The number of total carbon layers is conserved during the process, and we observe no other structural changes such as interlayer intercalation or expansion of the graphene d-spacing. These results clarify the under-determined structure of hydrogen intercalated QFS-EG/SiC(0001) and provide a precise model to inform further fundamental and practical understanding of the system.

  14. Structural effects of field emission from GaN nanofilms on SiC substrates

    SciTech Connect (OSTI)

    Chen, Cheng-Cheng; Wang, Ru-Zhi, E-mail: wrz@bjut.edu.cn; Zhu, Man-Kang; Yan, Hui [College of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, Chaoyang District, Beijing 100124 (China); Liu, Peng [Department of Physics Tsinghua University, Tsinghua-Foxconn Nanotechnology Research Center, Beijing 100084 (China); Wang, Bi-Ben [College of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054 (China)

    2014-04-21T23:59:59.000Z

    GaN nanofilms (NFs) with different structures are grown on SiC substrates by pulsed laser deposition under different conditions. The synthesized GaN NFs are studied by X-ray diffraction, field-emission (FE) scanning electron microscopy, X-ray photoelectron spectroscopy, and atomic force microscopy. The GaN NFs are composed of diversified GaN nanoparticles with a diameter of 938?nm, thickness of 1050?nm, and roughness of 0.2213.03?nm. FE from the GaN NFs is structure dependent, which is explained by stress changing the band gap of the NFs. By structure modulation, the turn-on field of GaN NFs can be as low as 0.66?V/?m at a current density of 1??A/cm{sup 2}, with a current density of up to 1.1?mA/cm{sup 2} at a field of 4.18?V/?m. Fowler-Nordheim curves of some samples contain multiple straight lines, which originate from the structural change and diversification of GaN nanoparticles under an applied field. Overall, our results suggest that GaN NFs with excellent FE properties can be prepared on SiC substrates, which provides a new route to fabricate high-efficiency FE nanodevices.

  15. Wavelet analysis of MODIS time series to detect expansion and intensification of row-crop agriculture in Brazil

    E-Print Network [OSTI]

    Vermont, University of

    -crop agriculture in Brazil Gillian L. Galford a,b,, John F. Mustard a , Jerry Melillo b , Aline Gendrin a Nuclear na Agricultura, Universidade de So Paulo, Brazil e Escola Superior de Agricultura Luiz de Queiroz from natural vegetation and pastures to row-crop agricultural with the potential to affect regional

  16. Jeffrey R. Row Environment and Resource Studies, University of Waterloo, Waterloo, Ontario, Canada, N2L 3G1

    E-Print Network [OSTI]

    Row, Jeffrey R.

    , N2L 3G1 Website: http://jeffrow.ca · Email: jeff.row@me.com · Phone: 1-416-399-3066 1 Education 2006 and population structure of foxsnakes across spatial and temporal scales. 2003-2005 M.Sc. Biology, University (Lampropeltis triangulum). 1997-2001 B.Sc. Environmental Biology, Queen's University, Kingston, Ontario. 2

  17. Corrosion resistant coatings for SiC and Si{sub 3}N{sub 4} ceramics

    SciTech Connect (OSTI)

    Nguyen Thierry; Shaokai Yang; J.J. Brown

    1998-09-01T23:59:59.000Z

    It is the goal of this program to (1) develop coatings for SiC and Si{sub 3}N{sub 4} that will enhance their performance as heat exchangers under coal combustion conditions and (2) to conduct an in-depth evaluation of the cause and severity of ceramic heat exchanger deterioration and failure under coal combustion conditions.

  18. Toward a Process-Based Molecular Model of SiC Membranes. 1. Development of a Reactive Force Field

    E-Print Network [OSTI]

    Goddard III, William A.

    Toward a Process-Based Molecular Model of SiC Membranes. 1. Development of a Reactive Force Field Angeles, California 90089-1211, United States Computational Chemistry Group, School of Chemistry be compared with experimental data. Good agreement is found between the data and the results of the MD

  19. Power Loss Estimation in SiC Power BJTs Cheng, Chen, SATIE, France, cheng.chen@satie.ens-cachan.fr

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Power Loss Estimation in SiC Power BJTs Cheng, Chen, SATIE, France, cheng, in the first step, presents the electrical and calorimetric power loss measurement [6]. A comparative study with a Tektronix TCP0030 probe (120MHz). Fig. 1. Circuit diagram of the test setup. 3. Power loss measurement

  20. Thermal performance evaluation of SiC power devices packaging A.GRACIA, S.AZZOPARDI, E.WOIRGARD

    E-Print Network [OSTI]

    Boyer, Edmond

    N allow high power densities, size reduction, high integration and elevated operating temperatures. In this study, we present solutions for high temperature power packages based on finite element simulations [1]. A SiC device has been already studied with an operating temperature of 400 C [2-3]. High

  1. Focused ion beam micromilling of GaN and related substrate materials ,,sapphire, SiC, and Si...

    E-Print Network [OSTI]

    Steckl, Andrew J.

    Focused ion beam micromilling of GaN and related substrate materials ,,sapphire, SiC, and Si... A. In addition, we report similar results for materials currently utilized as substrates for GaN growth. II-0030 Received 15 October 1998; accepted 18 December 1998 Micromilling of GaN films has been obtained using a Ga

  2. Generation-Recombination Defects In AlGaN/GaN HEMT On SiC Substrate,

    E-Print Network [OSTI]

    Boyer, Edmond

    Generation-Recombination Defects In AlGaN/GaN HEMT On SiC Substrate, Evidenced By Low Frequency Aristide Briand, 92.195 Meudon, France Abstract. Wide bandgap devices such as AlGaN/GaN High Electron of GR- bulges related respectively to AlGaN/GaN interface and quantum well are identified. Each GR

  3. Selection Process

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

    Selection Process Selection Process Fellowships will be awarded based on academic excellence, relevance of candidate's research to the laboratory mission in fundamental nuclear...

  4. The oxidation behavior of SiC sintered with Al-B-C and improved oxidation resistance via heat treatments

    SciTech Connect (OSTI)

    Sixta, M. [Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Mineral Engineering]|[Lawrence Berkeley National Lab., CA (United States). Materials Science Div.

    1997-12-01T23:59:59.000Z

    The oxidation behavior of high strength and high toughness SiC, sintered with Al, B, and C (ABC-SiC), was examined. Kinetic data were acquired and the parabolic rate constant for oxidation was determined and compared with literature data on various SiC materials. The role of secondary phases on the oxide morphology was explored. ABC-SiC was compared to commercially available SiC, Hexoloy, and SiC sintered with 10% yttrium aluminum garnet (YAG). Two-step sintering (pre-coarsening) was employed with holds for 48 hours at 600--1,600 C, prior to the typical hot-pressing conditions of 1,900 C for 1 hour, to change the chemistry and reduce the number of bubbles in the silica scale. The effects on the oxide thickness and integrity was examined as a function of the precoarsening heat treatment temperature. Additionally, the hot-pressed ABC-SiC was subjected to heat treatments (anneals) at 1,800 C for 1 hour in nitrogen, Ar, and vacuum environments, and the effects on subsequent oxidation were evaluated. The Ar and vacuum heat treatments dramatically improved the oxidation resistance of ABC-SiC. Finally, reoxidation experiments were performed to try to alter the surface chemistry of the SiC to improve the oxidation resistance. The four-point bend strengths and two-parameter Weibull plots of the most successful heat treatments were compared with the standard ABC-SiC to ensure that significant degradation did not result from altering the processing of the material.

  5. Representation of quantum states as points in a probability simplex associated to a SIC-POVM

    E-Print Network [OSTI]

    Jose Ignacio Rosado

    2011-06-08T23:59:59.000Z

    The quantum state of a $d$-dimensional system can be represented by the $d^2$ probabilities corresponding to a SIC-POVM, and then this distribution of probability can be represented by a vector of $\\R^{d^2-1}$ in a simplex, we will call this set of vectors $\\mathcal{Q}$. Other way of represent a $d$-dimensional system is by the corresponding Bloch vector also in $\\R^{d^2-1}$, we will call this set of vectors $\\mathcal{B}$. In this paper it is proved that with the adequate scaling $\\mathcal{B}=\\mathcal{Q}$. Also we indicate some features of the shape of $\\mathcal{Q}$.

  6. Vickers microindentation toughness of a sintered SiC in the median-crack regime

    SciTech Connect (OSTI)

    Ghosh, Asish; Kobayashi, A.S. (Washington Univ., Seattle, WA (United States). Coll. of Engineering); Li, Zhuang (Argonne National Lab., IL (United States)); Henager, C.H. Jr. (Pacific Northwest Lab., Richland, WA (United States)); Bradt, R.C. (Nevada Univ., Reno, NV (United States). Mackay School of Mines)

    1991-01-01T23:59:59.000Z

    The Vickers microindentation method for the determination of the fracture toughness of ceramics was investigated in the median crack regime for a sintered alpha SiC. The results are compared with fracture toughness measurements by conventional fracture mechanics technique and also with the reported indentation toughness for the low-load Palmqvist crack regime. Indentation toughnesses in the median crack regime vary widely depending on the choice of the specific equation which is applied. The indentation toughnesses are also load (crack length) dependent. A decreasing R-curve trend results, in contradiction to the flat R-curve that has been observed with conventional fracture mechanics techniques. It is concluded that the Vickers microindentation method is not a reliable technique for the determination of the fracture toughness of ceramics in the median crack regime.

  7. Effect of heat treatment on microstructure and interface of SiC particle reinforced 2124 Al matrix composite

    SciTech Connect (OSTI)

    Mandal, Durbadal, E-mail: durbadal73@yahoo.co.in [MEF Division, CSIR-National Metallurgical Laboratory, Jamshedpur 831007 (India); Viswanathan, Srinath [Dept of Metallurgical and Materials Engineering, University of Alabama, Tuscaloosa, AL (United States)

    2013-11-15T23:59:59.000Z

    The microstructure and interface between metal matrix and ceramic reinforcement of a composite play an important role in improving its properties. In the present investigation, the interface and intermetallic compound present in the samples were characterized to understand structural stability at an elevated temperature. Aluminum based 2124 alloy with 10 wt.% silicon carbide (SiC) particle reinforced composite was prepared through vortex method and the solid ingot was deformed by hot rolling for better particle distribution. Heat treatment of the composite was carried out at 575 C with varying holding time from 1 to 48 h followed by water quenching. In this study, the microstructure and interface of the SiC particle reinforced Al based composites have been studied using optical microscopy, scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectroscopy (EDS), electron probe micro-analyzer (EPMA) associated with wavelength dispersive spectroscopy (WDS) and transmission electron microscopy (TEM) to identify the precipitate and intermetallic phases that are formed during heat treatment. The SiC particles are uniformly distributed in the aluminum matrix. The microstructure analyses of AlSiC composite after heat treatment reveal that a wide range of dispersed phases are formed at grain boundary and surrounding the SiC particles. The energy dispersive X-ray spectroscopy and wavelength dispersive spectroscopy analyses confirm that finely dispersed phases are CuAl{sub 2} and CuMgAl{sub 2} intermetallic and large spherical phases are Fe{sub 2}SiAl{sub 8} or Al{sub 15}(Fe,Mn){sub 3}Si. It is also observed that a continuous layer enriched with Cu and Mg of thickness 5080 nm is formed at the interface in between Al and SiC particles. EDS analysis also confirms that Cu and Mg are segregated at the interface of the composite while no carbide is identified at the interface. - Highlights: The composite was successfully heat treated at 575C for 1-48 hrs. A layer of 50-75 nm is formed at interface after heat treatment. No Carbide formation and SiC dissolution is observed at this temperature. MgAl{sub 2}O{sub 4}, CuMgAl{sub 2} phases are segregated at interface of Al-SiC composite. Mg and Cu are also segregated at near to the grain boundary.

  8. The influence of mechanical summer pruning, row direction, and tree spacing on yield and quality of peach, Prunus persica (L.) Batsch

    E-Print Network [OSTI]

    Raseira, Ailton

    1985-01-01T23:59:59.000Z

    peach orchard densities were tested in peaches of cv. Redglobe. The trees were all winter pruned and then pruned 20 days before harvest (ESP, early summer pruning), after harvest (LSP, late summer pruning), or not pruned at summer time (WP, winter... pruning only) . The different spacing between plants within the row were: 2. 3 m, 3. 1 m and 4. 6 m, while the same space was maintained between rows. This research was designed to study the combined effect of plant spacing, summer pruning, and row...

  9. Double row loop-coil configuration for high-speed electrodynamic maglev suspension, guidance, propulsion and guideway directional switching

    DOE Patents [OSTI]

    He, J.; Rote, D.M.

    1996-05-21T23:59:59.000Z

    A stabilization and propulsion system are disclosed comprising a series of loop-coils arranged in parallel rows wherein two rows combine to form one of two magnetic rails. Levitation and lateral stability are provided when the induced field in the magnetic rails interacts with the superconducting magnets mounted on the magnetic levitation vehicle. The loop-coils forming the magnetic rails have specified dimensions and a specified number of turns and by constructing differently these specifications, for one rail with respect to the other, the angle of tilt of the vehicle can be controlled during directional switching. Propulsion is provided by the interaction of a traveling magnetic wave associated with the coils forming the rails and the superconducting magnets on the vehicle. 12 figs.

  10. Double row loop-coil configuration for high-speed electrodynamic maglev suspension, guidance, propulsion and guideway directional switching

    DOE Patents [OSTI]

    He, Jianliang (Naperville, IL); Rote, Donald M. (Lagrange, IL)

    1996-01-01T23:59:59.000Z

    A stabilization and propulsion system comprising a series of loop-coils arranged in parallel rows wherein two rows combine to form one of two magnetic rails. Levitation and lateral stability are provided when the induced field in the magnetic rails interacts with the superconducting magnets mounted on the magnetic levitation vehicle. The loop-coils forming the magnetic rails have specified dimensions and a specified number of turns and by constructing differently these specifications, for one rail with respect to the other, the angle of tilt of the vehicle can be controlled during directional switching. Propulsion is provided by the interaction of a traveling magnetic wave associated with the coils forming the rails and the super conducting magnets on the vehicle.

  11. First principles investigation of the initial stage of H-induced missing-row reconstruction of Pd(110) surface

    SciTech Connect (OSTI)

    Padama, Allan Abraham B. [Department of Applied Physics, Osaka University, Suita, Osaka 565-0871 (Japan); Kasai, Hideaki, E-mail: kasai@dyn.ap.eng.osaka-u.ac.jp [Department of Applied Physics, Osaka University, Suita, Osaka 565-0871 (Japan); Center for Atomic and Molecular Technologies, Osaka University, Suita, Osaka 565-0871 (Japan)

    2014-06-28T23:59:59.000Z

    The pathway of H diffusion that will induce the migration of Pd atom is investigated by employing first principles calculations based on density functional theory to explain the origin of missing-row reconstruction of Pd(110).The calculated activation barrier and the H-induced reconstruction energy reveal that the long bridge-to-tetrahedral configuration is the energetically favored process for the initial stage of reconstruction phenomenon. While the H diffusion triggers the migration of Pd atom, it is the latter process that significantly contributes to the activated missing-row reconstruction of Pd(110). Nonetheless, the strong interaction between the diffusing H and the Pd atoms dictates the occurrence of reconstructed surface.

  12. Effect of plant populations and row spacings on plant and ear characters and grain yield of corn hybrids

    E-Print Network [OSTI]

    Silapapun, Anek

    1976-01-01T23:59:59.000Z

    break- age and barren stalks increased with increase in population densities. Allessi and Power (2) also found that number of barren stalks increased and ear weight decreased with increased plant population. Bleasdale (7) proposed that if a crop...EFFECT OF PLANT POPULATIONS AND ROW SPACINGS ON PLANT AND EAR CHARACTERS AND GRAIN YIELD OF CORN HYBRIDS A Thesis by ANEK SILAPAPUN Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement...

  13. Effect of tillage systems, row configuration-spacing and plant population on soil physical properties, evapotranspiration and dryland sorghum yields

    E-Print Network [OSTI]

    Salinas-Garcia, Jaime Roel

    1981-01-01T23:59:59.000Z

    EFFECT OF T ILLAGE SYSTEMS & R01I CONF IGURAT I ON SPACING AND PLANT POPULATION ON SOIL PHYSICAL PROPERTIES, EVAPOTRANSPIRATION AND DRYLAND SORGHUM YIELDS A Thesis by JAIME ROEL SALINAS-GARCIA Submitted to the Graduate College of Texas ASM... AND DRYLAND SORGHUM YIELDS A Thesis by JAIME ROEL SALINAS-GARCIA Approved as to style and content by: (Co-Chairman of Committ. ee) ( o-Chairman of Committee) (Member) (Head of Department) December 1981 ABSTRACT Effect of Tillage Systems, Row...

  14. Electrodeposited composite coating of Ni-W-P with nano-sized rod- and spherical-shaped SiC particles

    SciTech Connect (OSTI)

    Aal, A. Abdel [Central Metallurgical R and D Institute (CMRDI), P.O. Box 87, Hellwan, Cairo (Egypt)], E-mail: foralsayed@gmail.com; El-Sheikh, S.M.; Ahmed, Y.M.Z. [Central Metallurgical R and D Institute (CMRDI), P.O. Box 87, Hellwan, Cairo (Egypt)

    2009-01-08T23:59:59.000Z

    In this research, Ni-W-P-SiC nanocomposite coatings are electrodeposited from the plating solution containing suspension of nano-sized spherical- and rod-shaped SiC particles. The influence of SiC particle charge, applied current density, surfactant addition and the particle shape on the SiC incorporation rate has been studied. The phase structure, microhardness and wear resistance of Ni-W-P-SiC nanocomposite coatings were evaluated using X-ray diffraction (XRD), microhardness tester and wear test apparatus. The surface morphology of the produced coatings and worn surfaces has been investigated using scanning electron microscope (SEM). Additionally, the composite coating exhibited higher hardness and wear resistance than the pure Ni-W-P alloy. Regardless the particle shape, the mechanical characteristics of composite coatings are improved with increasing of SiC wt.% into the matrix. The corrosion behavior of the produced coatings was studied using anodic polarization measurements. The nanocomposite coating incorporating SiC rods exhibited higher mechanical and corrosion performance compared with deposits with spherical SiC nano-particles.

  15. Hydrogen intercalation of single and multiple layer graphene synthesized on Si-terminated SiC(0001) surface

    SciTech Connect (OSTI)

    So?tys, Jakub; Piechota, Jacek; Ptasinska, Maria [Interdisciplinary Centre for Mathematical and Computational Modelling, University of Warsaw, Pawi?skiego 5a, 02-106 Warsaw (Poland); Krukowski, Stanis?aw, E-mail: stach@unipress.waw.pl [Interdisciplinary Centre for Mathematical and Computational Modelling, University of Warsaw, Pawi?skiego 5a, 02-106 Warsaw (Poland); Institute of High Pressure Physics, Polish Academy of Sciences, Soko?owska 29/37, 01-142 Warsaw (Poland)

    2014-08-28T23:59:59.000Z

    Ab initio density functional theory simulations were used to investigate the influence of hydrogen intercalation on the electronic properties of single and multiple graphene layers deposited on the SiC(0001) surface (Si-face). It is shown that single carbon layer, known as a buffer layer, covalently bound to the SiC substrate, is liberated after hydrogen intercalation, showing characteristic Dirac cones in the band structure. This is in agreement with the results of angle resolved photoelectron spectroscopy measurements of hydrogen intercalation of SiC-graphene samples. In contrast to that hydrogen intercalation has limited impact on the multiple sheet graphene, deposited on Si-terminated SiC surface. The covalently bound buffer layer is liberated attaining its graphene like structure and dispersion relation typical for multilayer graphene. Nevertheless, before and after intercalation, the four layer graphene preserved the following dispersion relations in the vicinity of K point: linear for (AAAA) stacking, direct parabolic for Bernal (ABAB) stacking and wizard hat parabolic for rhombohedral (ABCA) stacking.

  16. SICS: A Sensor-based in-line control system for the surfaces of continuously cast slabs

    SciTech Connect (OSTI)

    Chang, Tzyy-Shuh [OG Technologies, Inc.

    2013-09-23T23:59:59.000Z

    The Phase II project has been carried out in accordance to the proposed tasks and budget, based on the original and extended schedule. The R&D team designed and implemented the test unit for the full width coverage, installed the unit in a caster. The development work further included enhanced image processing, in-depth defect study and process control models. The function, operation, and maintenance of the SICS was thoroughly studied during the Phase II research. The experience indicates additional hardware and procedures are required to make the SICS a commercially ready product in operation and maintenance aspect. Such developments have been finished and the team is contacting potential customers for the first commercial installation of SICS. Additionally, OGT is exploring the possibility to team up with a US company that specializes in surface cleaning for slabs/blooms/billets such that the in-line surface inspection can be integrated with in-line surface clean up for the maximum benefit to the steel industry.

  17. A TEM quantitative evaluation of strengthening in an Mg-RE alloy reinforced with SiC

    SciTech Connect (OSTI)

    Cabibbo, Marcello, E-mail: m.cabibbo@univpm.it; Spigarelli, Stefano

    2011-10-15T23:59:59.000Z

    Magnesium alloys containing rare earth elements are known to have high specific strength, good creep and corrosion resistance up to 523 K. The addition of SiC ceramic particles strengthens the metal matrix composite resulting in better wear and creep resistance while maintaining good machinability. The role of the reinforcement particles in enhancing strength can be quantitatively evaluated using transmission electron microscopy (TEM). This paper presents a quantitative evaluation of the different strengthening contributions, determined through TEM inspections, in an SiC Mg-RE composite alloy containing yttrium, neodymium, gadolinium and dysprosium. Compression tests at temperatures ranging between 290 and 573 K were carried out. The microstructure strengthening mechanism was studied for all the compression conditions. Strengthening was compared to the mechanical results and the way the different contributions were combined is also discussed and justified. - Research Highlights: {yields} TEM yield strengthening terms evaluation on a Mg-RE SiC alloy. {yields} The evaluation has been extended to different compression temperature conditions. {yields} Linear and Quadratic sum has been proposed and validated. {yields} Hall-Petch was found to be the most prominent strengthening contributions.

  18. Mechanical Characteristics of SiC Coating Layer in TRISO Fuel Particles

    SciTech Connect (OSTI)

    P. Hosemann; J. N. Martos; D. Frazer; G. Vasudevamurthy; T. S. Byun; J. D. Hunn; B. C. Jolly; K. Terrani; M. Okuniewski

    2013-11-01T23:59:59.000Z

    Tristructural isotropic (TRISO) particles are considered as advanced fuel forms for a variety of fission platforms. While these fuel structures have been tested and deployed in reactors, the mechanical properties of these structures as a function of production parameters need to be investigated in order to ensure their reliability during service. Nanoindentation techniques, indentation crack testing, and half sphere crush testing were utilized in order to evaluate the integrity of the SiC coating layer that is meant to prevent fission product release in the coated particle fuel form. The results are complimented by scanning electron microscopy (SEM) of the grain structure that is subject to change as a function of processing parameters and can alter the mechanical properties such as hardness, elastic modulus, fracture toughness and fracture strength. Through utilization of these advanced techniques, subtle differences in mechanical properties that can be important for in-pile fuel performance can be distinguished and optimized in iteration with processing science of coated fuel particle production.

  19. Mechanical characteristics of SiC coating layer in TRISO fuel particles

    SciTech Connect (OSTI)

    Hosemann, Peter [ORNL] [ORNL; Martos, J. N. [University of California, Berkeley] [University of California, Berkeley; Frazer, D. [University of California, Berkeley] [University of California, Berkeley; Vasudevamurthy, Gokul [ORNL] [ORNL; Byun, Thak Sang [ORNL] [ORNL; Hunn, John D [ORNL] [ORNL; Jolly, Brian C [ORNL] [ORNL; Terrani, Kurt A [ORNL] [ORNL; Okuniewski, Maria A. [Idaho National Laboratory (INL)] [Idaho National Laboratory (INL)

    2013-01-01T23:59:59.000Z

    Tristructural isotropic (TRISO) particles are considered as advanced fuel forms for a variety of fission platforms. While these fuel structures have been tested and deployed in reactors, the mechanical properties of these structures as a function of production parameters need to be investigated in order to ensure their reliability during service. Nanoindentation techniques, indentation crack testing, and half sphere crush testing were utilized in order to evaluate the integrity of the SiC coating layer that is meant to prevent fission product release in the coated particle fuel form. The results are complimented by scanning electron microscopy (SEM) of the grain structure that is subject to change as a function of processing parameters and can alter the mechanical properties such as hardness, elastic modulus, fracture toughness and fracture strength. Through utilization of these advanced techniques, subtle differences in mechanical properties that can be important for in-pile fuel performance can be distinguished and optimized in iteration with processing science of coated fuel particle production.

  20. Stress-temperature-lifetime response of nicalon fiber-reinforced SiC composites in air

    SciTech Connect (OSTI)

    Lin, Hua-Tay; Becher, P.F.

    1996-02-01T23:59:59.000Z

    Time-to-failure tests were conducted in four-point flexure and in air as a function of stress levels and temperatures to study the lifetime response of various Nicalon fiber-reinforced SiC (designated as Nic/SiC) composites with a graphitic interfacial coating. The results indicated that all of the Nic/SiC composites exhibit a similar stress-dependent failure at applied stress greater than a threshold value. In this case, the lifetimes of the composites increased with decrease in both stress level and test temperature. The lifetime of the composites appeared to be relatively insensitive to the thickness of graphitic interface layer and was enhanced somewhat by the addition of oxidation inhibitors. Electron microscopy and oxidation studies indicated that the life of the Nic/SiC composites was governed by the oxidation of the graphitic interfaces and the on of glass(es) in composites due to the oxidation of the fiber and matrix, inhibitor phases.

  1. Damage Profiles and Ion Distribution in Pt-irradiated SiC

    SciTech Connect (OSTI)

    Xue, Haizhou; Zhang, Yanwen; Zhu, Zihua; Zhang, Weiming; Bae, In-Tae; Weber, William J.

    2012-09-01T23:59:59.000Z

    Single crystalline 6H-SiC samples were irradiated at 150 K with 2 MeV Pt ions. The local volume swelling was determined by electron energy loss spectroscopy (EELS), and a nearly sigmoidal dependence on irradiation dose is observed. The disorder profiles and ion distribution were determined by Rutherford backscattering spectrometry (RBS), transmission electron microscopy, and secondary ion mass spectrometry. Since the volume swelling reaches 12% over the damage region at high ion fluence, the effect of lattice expansion is considered and corrected for in the analysis of RBS spectra to obtain depth profiles. Projectile and damage profiles are estimated by SRIM (Stopping and Range of Ions in Matter).When compared with the measured profiles, the SRIM code predictions of ion distribution and the damage profiles are underestimated due to significant overestimation of the electronic stopping power for the slow heavy Pt ions. By utilizing the reciprocity method, which is based on the invariance of the inelastic energy loss in ion-solid collisions against interchange of projectile and target atom, a much lower electronic stopping power is deduced. A simple approach, based on reducing the density of SiC target in SRIM simulation, is proposed to compensate the overestimated SRIM electronic stopping power values, which results in improved agreement between predicted and measured damage profiles and ion ranges.

  2. Strain-engineered band parameters of graphene-like SiC monolayer

    SciTech Connect (OSTI)

    Behera, Harihar, E-mail: harihar@theglocaluniversity.in [School of Technology, The Glocal University, Mirzapur Pole, Dist.-Saharanpur, U.P.-247001, India and Department of Physics, Indian Institute of Technology Bombay, Powai, Mumbai-400076 (India); Mukhopadhyay, Gautam, E-mail: gmukh@phy.iitb.ac.in [Department of Physics, Indian Institute of Technology Bombay, Powai, Mumbai-400076 (India)

    2014-10-06T23:59:59.000Z

    Using full-potential density functional theory (DFT) calculations we show that the band gap and effective masses of charge carriers in SiC monolayer (ML-SiC) in graphene-like two-dimensional honeycomb structure are tunable by strain engineering. ML-SiC was found to preserve its flat 2D graphene-like structure under compressive strain up to 7%. A transition from indirect-to-direct gap-phase is predicted to occur for a strain value lying within the interval (1.11 %, 1.76%). In both gap-phases band gap decreases with increasing strain, although the rate of decrease is different in the two gap-phases. Effective mass of electrons show a non-linearly decreasing trend with increasing tensile strain in the direct gap-phase. The strain-sensitive properties of ML-SiC, may find applications in future strain-sensors, nanoelectromechanical systems (NEMS) and nano-optomechanical systems (NOMS) and other nano-devices.

  3. Combined MOCVD and MBE growth of GaN on porous SiC Ashutosh Sagar (a), R. M. Feenstra (a), C. K. Inoki (b), T. S. Kuan (b), D. D. Koleske (c)

    E-Print Network [OSTI]

    Feenstra, Randall

    homoepitaxially by MOCVD on MBE-grown GaN template layers, using both porous and nonporous SiC substrates. The effect of the porous SiC substrates on dislocations in the MBE and MOCVD GaN layers has been studied in the recent years as an attractive substrate for epitaxy of GaN and SiC [1-6]. Earlier studies have shown

  4. Creep performance of candidate SiC and Si{sub 3}N{sub 4} materials for land-based, gas turbine engine components

    SciTech Connect (OSTI)

    Wereszczak, A.A.; Kirkland, T.P.

    1996-03-01T23:59:59.000Z

    Tensile creep-rupture of a commercial gas pressure sintered Si3N4 and a sintered SiC is examined at 1038, 1150, and 1350 C. These 2 ceramics are candidates for nozzles and combustor tiles that are to be retrofitted in land-based gas turbine engines, and there is interest in their high temperature performance over service times {ge} 10,000 h (14 months). For this long lifetime, a static tensile stress of 300 MPa at 1038/1150 C and 125 Mpa at 1350 C cannot be exceeded for Si3N4; for SiC, the corresponding numbers are 300 Mpa at 1038 C, 250 MPa at 1150 C, and 180 MPa at 1350 C. Creep-stress exponents for Si3N4 are 33, 17, and 8 for 1038, 1150, 1350 C; fatigue- stress exponents are equivalent to creep exponents, suggesting that the fatigue mechanism causing fracture is related to the creep mechanism. Little success was obtained in producing failure in SiC after several decades of time through exposure to appropriate tensile stress; if failure did not occur on loading, then the SiC specimens most often did not creep-rupture. Creep-stress exponents for the SiC were determined to be 57, 27, and 11 for 1038, 1150, and 1350 C. For SiC, the fatigue-stress exponents did not correlate as well with creep-stress exponents. Failures that occurred in the SiC were a result of slow crack growth that initiated from the surface.

  5. FORMATION OF SiC GRAINS IN PULSATION-ENHANCED DUST-DRIVEN WIND AROUND CARBON-RICH ASYMPTOTIC GIANT BRANCH STARS

    SciTech Connect (OSTI)

    Yasuda, Yuki; Kozasa, Takashi, E-mail: yuki@antares-a.sci.hokudai.ac.jp [Department of Natural History Sciences, Faculty of Science, Hokkaido University, Sapporo 060-0810 (Japan)

    2012-02-01T23:59:59.000Z

    We investigate the formation of silicon carbide (SiC) grains in the framework of dust-driven wind around pulsating carbon-rich asymptotic giant branch (C-rich AGB) stars to reveal not only the amount but also the size distribution. Two cases are considered for the nucleation process: one is the local thermal equilibrium (LTE) case where the vibration temperature of SiC clusters T{sub v} is equal to the gas temperature as usual, and another is the non-LTE case in which T{sub v} is assumed to be the same as the temperature of small SiC grains. The results of the hydrodynamical calculations for a model with stellar parameters of mass M{sub *} = 1.0 M{sub Sun }, luminosity L{sub *} = 10{sup 4} L{sub Sun }, effective temperature T{sub eff} = 2600 K, C/O ratio = 1.4, and pulsation period P = 650 days show the following: in the LTE case, SiC grains condense in accelerated outflowing gas after the formation of carbon grains, and the resulting averaged mass ratio of SiC to carbon grains of {approx}10{sup -8} is too small to reproduce the value of 0.01-0.3, which is inferred from the radiative transfer models. On the other hand, in the non-LTE case, the formation region of the SiC grains is more internal and/or almost identical to that of the carbon grains due to the so-called inverse greenhouse effect. The mass ratio of SiC to carbon grains averaged at the outer boundary ranges from 0.098 to 0.23 for the sticking probability {alpha}{sub s} = 0.1-1.0. The size distributions with the peak at {approx}0.2-0.3 {mu}m in radius cover the range of size derived from the analysis of the presolar SiC grains. Thus, the difference between the temperatures of the small cluster and gas plays a crucial role in the formation process of SiC grains around C-rich AGB stars, and this aspect should be explored for the formation process of dust grains in astrophysical environments.

  6. Extension of the Si:C Stressor Thickness by Using Multiple ClusterCarbon Species

    SciTech Connect (OSTI)

    Sekar, Karuppanan; Krull, Wade [SemEquip, Inc. N. Billerica, MA, 01862 (United States)

    2011-01-07T23:59:59.000Z

    ClusterCarbon implantation is now well established as an attractive alternative for producing stress in advanced NMOS devices. ClusterCarbon has the advantage over monomer carbon implant in it's self-amorphization feature, eliminating the need for PAI implantation while producing highly substitutional carbon incorporation. To date, the limitation of this approach has been the high energy limit, due to the extraction limit of the available production tools for the preferred carbon species, which has been the C7Hx molecule. It is noted that the C7 species is produced by the breakup of the parent C14H14 molecule in the ion source. It is further noted that the preferred method of producing the Si:C stress layer is a multiple implant sequence with ClusterCarbon implants at various energies and doses designed to produce a carbon profile which is constant in-depth. The stressor thickness limit using C7 is known to be about 40 nm, which is less than the stressor thickness used in the conventional SiGe process for PMOS. In this work, it is shown that utilizing the C5 molecule which is also available from the breakup of C14H14 enables the stressor layer thickness to be extended to at least 60 nm, which is consistent with the conventional SiGe process. It will be shown that one additional C5 implant, performed after a standard C7 multiple implant sequence, can produce the extension of the stressor thickness while maintaining the flat depth profile. A detailed process characterization will be shown for this new process sequence.

  7. Current and future industrial energy service characterizations. Volume III. Energy data on 15 selected states' manufacturing subsector

    SciTech Connect (OSTI)

    Krawiec, F.; Thomas, T.; Jackson, F.; Limaye, D.R.; Isser, S.; Karnofsky, K.; Davis, T.D.

    1980-11-01T23:59:59.000Z

    An examination is made of the current and future energy demands, and uses, and cost to characterize typical applications and resulting services in the US and industrial sectors of 15 selected states. Volume III presents tables containing data on selected states' manufacturing subsector energy consumption, functional uses, and cost in 1974 and 1976. Alabama, California, Illinois, Indiana, Louisiana, Michigan, Missouri, New Jersey, New York, Ohio, Oregon, Pennsylvania, Texas, West Virginia, and Wisconsin were chosen as having the greatest potential for replacing conventional fuel with solar energy. Basic data on the quantities, cost, and types of fuel and electric energy purchased by industr for heat and power were obtained from the 1974 and 1976 Annual Survey of Manufacturers. The specific indutrial energy servic cracteristics developed for each selected state include. 1974 and 1976 manufacturing subsector fuels and electricity consumption by 2-, 3-, and 4-digit SIC and primary fuel (quantity and relative share); 1974 and 1976 manufacturing subsector fuel consumption by 2-, 3-, and 4-digit SIC and primary fuel (quantity and relative share); 1974 and 1976 manufacturing subsector average cost of purchsed fuels and electricity per million Btu by 2-, 3-, and 4-digit SIC and primary fuel (in 1976 dollars); 1974 and 1976 manufacturing subsector fuels and electric energy intensity by 2-, 3-, and 4-digit SIC and primary fuel (in 1976 dollars); manufacturing subsector average annual growth rates of (1) fuels and electricity consumption, (2) fuels and electric energy intensity, and (3) average cost of purchased fuels and electricity (1974 to 1976). Data are compiled on purchased fuels, distillate fuel oil, residual ful oil, coal, coal, and breeze, and natural gas. (MCW)

  8. Development of a full-flow burner regeneration type diesel particulate filter using SiC honeycomb

    SciTech Connect (OSTI)

    Okazoe, Hiroshi; Shimizu, Kenji; Watanabe, Yoshito; Santiago, E.; Kugland, P.; Ruth, W.

    1996-09-01T23:59:59.000Z

    A diesel particulate filter (DPF) for city buses was developed that combines a SiC filter and a full-now type burner for regeneration. Filter crack problems were averted by suppressing the peak temperature inside the filter to under 900 C. This was done by setting the maximum tolerable amount of collected particulate mass before regeneration at 50 g and controlling the burner so as to increase the regeneration gas temperature slowly up to a set value. This DPF was retrofitted to a Tokyo metropolitan bus to conduct a field test. The field test has been under way for half a year without any trouble or deterioration of system performance.

  9. Selective-area room temperature visible photoluminescence from SiC/Si heterostructures

    E-Print Network [OSTI]

    Steckl, Andrew J.

    shown8 to produce monocrystalline thin films, while minimizing the high temperature exposure. The Sic mismatch, heteroepitaxial growth of Sic films on Si has been achieved by several groups?-' In addition, SicSi. For example, polycrystalline Sic deposited on Si after it is rendered porous has been utilized9

  10. arXiv:1102.3798v1[cond-mat.mes-hall]18Feb2011 Graphene on the carbon face of SiC: electronic structure modification by hydrogen

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    arXiv:1102.3798v1[cond-mat.mes-hall]18Feb2011 Graphene on the carbon face of SiC: electronic that the first C layer on the SiC(0001)(22)C surface already exhibits graphene- like electronic structure transfer mechanism. Here, we study the effects of interface mod- ifications on the graphene layer using

  11. Smoothing single-crystalline SiC surfaces by reactive ion etching using pure NF{sub 3} and NF{sub 3}/Ar mixture gas plasmas

    SciTech Connect (OSTI)

    Tasaka, Akimasa, E-mail: aki-tasaka-load@yahoo.co.jp [Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, 1-3 Miyako-dani, Tatara, Kyotanabe, Kyoto 610-0321, Japan and Department of Applied Chemistry, Graduate School of Engineering, Doshisha University, 1-3 Miyako-dani, Tatara, Kyotanabe, Kyoto 610-0321 (Japan); Kotaka, Yuki [Department of Applied Chemistry, Graduate School of Engineering, Doshisha University, 1-3 Miyako-dani, Tatara, Kyotanabe, Kyoto 610-0321 (Japan); Oda, Atsushi; Saito, Morihiro [Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, 1-3 Miyako-dani, Tatara, Kyotanabe, Kyoto 610-0321 (Japan); Tojo, Tetsuro [Toyo Tanso Co, Ltd., 5-7-2 Takeshima, Nishi yodogawa-ku, Osaka 555-0011 (Japan); Inaba, Minoru [Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, 1-3 Miyako-dani, Tatara, Kyotanabe, Kyoto 610-0321, Japan and Department of Applied Chemistry, Graduate School of Science and Engineering, Doshisha University, 1-3 Miyako-dani, Tatara, Kyotanabe, Kyoto 610-0321 (Japan)

    2014-09-01T23:59:59.000Z

    In pure NF{sub 3} plasma, the etching rates of four kinds of single-crystalline SiC wafer etched at NF{sub 3} pressure of 2?Pa were the highest and it decreased with an increase in NF{sub 3} pressure. On the other hand, they increased with an increase in radio frequency (RF) power and were the highest at RF power of 200?W. A smooth surface was obtained on the single-crystalline 4H-SiC after reactive ion etching at NF{sub 3}/Ar gas pressure of 2?Pa and addition of Ar to NF{sub 3} plasma increased the smoothness of SiC surface. Scanning electron microscopy observation revealed that the number of pillars decreased with an increase in the Ar-concentration in the NF{sub 3}/Ar mixture gas. The roughness factor (R{sub a}) values were decreased from 51.5?nm to 25.5?nm for the As-cut SiC, from 0.25?nm to 0.20?nm for the Epi-SiC, from 5.0?nm to 0.7?nm for the Si-face mirror-polished SiC, and from 0.20?nm to 0.16?nm for the C-face mirror-polished SiC by adding 60% Ar to the NF{sub 3} gas. Both the R{sub a} values of the Epi- and the C-face mirror-polished wafer surfaces etched using the NF{sub 3}/Ar (40:60) plasma were similar to that treated with mirror polishing, so-called the Catalyst-Referred Etching (CARE) method, with which the lowest roughness of surface was obtained among the chemical mirror polishing methods. Etching duration for smoothing the single-crystalline SiC surface using its treatment was one third of that with the CARE method.

  12. A 10-kW SiC Inverter with A Novel Printed Metal Power Module With Integrated Cooling Using Additive Manufacturing

    SciTech Connect (OSTI)

    Chinthavali, Madhu Sudhan [ORNL; Ayers, Curtis William [ORNL; Campbell, Steven L [ORNL; Wiles, Randy H [ORNL; Ozpineci, Burak [ORNL

    2014-01-01T23:59:59.000Z

    With efforts to reduce the cost, size, and thermal management systems for the power electronics drivetrain in hybrid electric vehicles (HEVs) and plug-in hybrid electric vehicles (PHEVs), wide band gap semiconductors including silicon carbide (SiC) have been identified as possibly being a partial solution. This paper focuses on the development of a 10-kW all SiC inverter using a high power density, integrated printed metal power module with integrated cooling using additive manufacturing techniques. This is the first ever heat sink printed for a power electronics application. About 50% of the inverter was built using additive manufacturing techniques.

  13. TUNGSTEN ISOTOPIC COMPOSITIONS IN STARDUST SiC GRAINS FROM THE MURCHISON METEORITE: CONSTRAINTS ON THE s-PROCESS IN THE Hf-Ta-W-Re-Os REGION

    SciTech Connect (OSTI)

    Avila, Janaina N.; Ireland, Trevor R.; Holden, Peter [Research School of Earth Sciences, Australian National University, Canberra, ACT 0200 (Australia); Lugaro, Maria; Buntain, Joelene [Centre for Stellar and Planetary Astrophysics, Monash University, Clayton, VIC 3800 (Australia); Gyngard, Frank; Zinner, Ernst; Amari, Sachiko [Laboratory for Space Sciences and the Department of Physics, Washington University, One Brookings Drive, St. Louis, MO 63130 (United States); Cristallo, Sergio [Departamento de Fisica Teorica y del Cosmos, Universidad de Granada, Granada 18071 (Spain); Karakas, Amanda, E-mail: janaina.avila@anu.edu.au [Mount Stromlo Observatory, Australian National University, Weston Creek, ACT 2611 (Australia)

    2012-01-01T23:59:59.000Z

    We report the first tungsten isotopic measurements in stardust silicon carbide (SiC) grains recovered from the Murchison carbonaceous chondrite. The isotopes {sup 182,183,184,186}W and {sup 179,180}Hf were measured on both an aggregate (KJB fraction) and single stardust SiC grains (LS+LU fraction) believed to have condensed in the outflows of low-mass carbon-rich asymptotic giant branch (AGB) stars with close-to-solar metallicity. The SiC aggregate shows small deviations from terrestrial (= solar) composition in the {sup 182}W/{sup 184}W and {sup 183}W/{sup 184}W ratios, with deficits in {sup 182}W and {sup 183}W with respect to {sup 184}W. The {sup 186}W/{sup 184}W ratio, however, shows no apparent deviation from the solar value. Tungsten isotopic measurements in single mainstream stardust SiC grains revealed lower than solar {sup 182}W/{sup 184}W, {sup 183}W/{sup 184}W, and {sup 186}W/{sup 184}W ratios. We have compared the SiC data with theoretical predictions of the evolution of W isotopic ratios in the envelopes of AGB stars. These ratios are affected by the slow neutron-capture process and match the SiC data regarding their {sup 182}W/{sup 184}W, {sup 183}W/{sup 184}W, and {sup 179}Hf/{sup 180}Hf isotopic compositions, although a small adjustment in the s-process production of {sup 183}W is needed in order to have a better agreement between the SiC data and model predictions. The models cannot explain the {sup 186}W/{sup 184}W ratios observed in the SiC grains, even when the current {sup 185}W neutron-capture cross section is increased by a factor of two. Further study is required to better assess how model uncertainties (e.g., the formation of the {sup 13}C neutron source, the mass-loss law, the modeling of the third dredge-up, and the efficiency of the {sup 22}Ne neutron source) may affect current s-process predictions.

  14. Mid-infrared spectroscopy of SVS13: Silicates, quartz and SiC in a protoplanetary disc

    E-Print Network [OSTI]

    Fujiyoshi, Takuya; Moore, Toby J T

    2015-01-01T23:59:59.000Z

    We present $N$-band (8$-$13 $\\mu$m) spectroscopic observations of the low-mass, embedded pre-main-sequence close binary system SVS13. Absorption features are clearly detected which are attributable to amorphous silicates, crystalline forsterite, crystalline enstatite and annealed SiO$_{2}$. Most intriguingly, a major component of the dust in the envelope or disc around SVS13 appears to be SiC, required to model adequately both the total intensity and polarisation spectra. Silicon carbide is a species previously detected only in the spectra of C-rich evolved star atmospheres, wherein it is a dust condensate. It has not been unambiguously identified in the interstellar medium, and never before in a molecular cloud, let alone in close proximity to a forming star. Yet pre-Solar grains of SiC have been identified in meteorites, possibly suggesting an interesting parallel between SVS13 and our own Solar-System evolution. The uniqueness of the spectrum suggests that we are either catching SVS13 in a short-lived evol...

  15. Morphological Analysis of Zirconium Nuclear Fuel Retaining Rods Braided with SiC: Quality Assurance and Defect Identification

    SciTech Connect (OSTI)

    Michael V Glazoff; Robert Hiromoto; Akira Tokuhiro

    2014-08-01T23:59:59.000Z

    In the after-Fukushima world, the stability of materials under extreme conditions is an important issue for the safety of nuclear reactors. Among the methods explored currently to improve zircaloys thermal stability in off-normal conditions, using a protective coat of the SiC filaments is considered because silicon carbide is well known for its remarkable chemical inertness at high temperatures. A typical SiC fiber contains ~50,000 individual filaments of 5 10 m in diameter. In this paper, an effort was made to develop and apply mathematical morphology to the process of automatic defect identification in Zircaloy-4 rods braided with the protective layer of the silicon carbide filament. However, the issues of the braiding quality have to be addressed to ensure its full protective potential. We present the original mathematical morphology algorithms that allow solving this problem of quality assurance successfully. In nuclear industry, such algorithms are used for the first time, and could be easily generalized to the case of automated continuous monitoring for defect identification in the future.

  16. Europium s-process signature at close-to-solar metallicity in stardust SiC grains from AGB stars

    E-Print Network [OSTI]

    Avila, Janaina N; Lugaro, Maria; Gyngard, Frank; Zinner, Ernst; Cristallo, Sergio; Holden, Peter; Rauscher, Thomas

    2013-01-01T23:59:59.000Z

    Individual mainstream stardust silicon carbide (SiC) grains and a SiC-enriched bulk sample from the Murchison carbonaceous meteorite have been analyzed by the Sensitive High Resolution Ion Microprobe - Reverse Geometry (SHRIMP-RG) for Eu isotopes. The mainstream grains are believed to have condensed in the outflows of 1.5 to 3 Msun carbon-rich asymptotic giant branch (AGB) stars with close-to-solar metallicity. The 151Eu fractions [fr(151Eu) = 151Eu/(151Eu+153Eu)] derived from our measurements are compared with previous astronomical observations of carbon-enhanced metal-poor (CEMP) stars enriched in elements made by slow neutron captures (the s-process). Despite the difference in metallicity between the parent stars of the grains and the metal-poor stars, the fr(151Eu) values derived from our measurements agree well with fr(151Eu) values derived from astronomical observations. We have also compared the SiC data with theoretical predictions of the evolution of Eu isotopic ratios in the envelope of AGB stars. B...

  17. Heat transfer from combustion gases to a single row of closely spaced tubes in a swirl crossflow Stirling engine heater

    SciTech Connect (OSTI)

    Bankston, C.P.; Back, L.H.

    1982-02-01T23:59:59.000Z

    This paper describes an experimental program to determine the heat-transfer characteristics of a combustor and heat-exchange system in a hybrid solar receiver which utilizes a Stirling engine. The system consists of a swirl conbustor with a crossflow heat exchanger composed of a single row of 48 closely spaced curved tubes. In the present study, heat-transfer characteristics of the combustor/heat-exchanger system without a Stirling engine have been studied over a range of operating conditions and output levels using water as the working fluid. Non-dimensional heat-transfer coefficients based on total heat transfer have been obtained and are compared with available literature data. The results show significantly enhanced heat transfer for the present geometry and test conditions. Also, heat transfer along the length of the tubes is found to vary, the effect depending upon test condition.

  18. Row by row methods for semidefinite programming

    E-Print Network [OSTI]

    Zaiwen Wen

    2009-04-28T23:59:59.000Z

    Apr 28, 2009 ... ... is supported by the Mathematical Programming Society and by the Optimization Technology Center. Mathematical Programming Society.

  19. ROW BY ROW METHODS FOR SEMIDEFINITE PROGRAMMING ...

    E-Print Network [OSTI]

    2009-04-28T23:59:59.000Z

    Apr 28, 2009 ... than 5.25 minutes and nuclear norm matrix completion SDPs involving matrices of size 1000 1000 in less than 1 minute on a 3.4 GHZ...

  20. High-Temperature Die-Attaches for SiC Power Devices Amandine MASSON1, Cyril BUTTAY1, Herve MOREL1, Christophe RAYNAUD1,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    of the solder joint degrade. The ratio between the melting temperature (Tm) and the operating temperature (To electronic systems which will be installed in hot areas. SiC power devices can operate at high temperature operating temperature range. Furthermore, the reliability of the attach is directly linked to its operating

  1. Interfacial studies of refractory glass-ceramic matrix/advanced SiC fiber-reinforced composites. Annual report, 1 Feb 91-1 Feb 92

    SciTech Connect (OSTI)

    Brennan, J.J.

    1992-04-30T23:59:59.000Z

    The main objective of this program is to characterize the chemistry and structure of new advanced small diameter silicon based fibers and how these factors influence the nature of the fiber/matrix interface in refractory glass-ceramic matrix composites. It is the nature of this interface that then determines to a great degree the composite thermal, environmental, and mechanical properties. The fibers under investigation during the second year of this program included the new experimental polymer derived crystalline SiC fibers from Dow Corning Corp., the Si-N-C-O 'Black' fibers from Textron Specialty Materials, as well as the new low oxygen radiation cured Nicalon SiC type fibers from Nippon Carbon Co. Since the availability of all of these fibers was extremely limited, emphasis was placed on the mechanical, chemical, and microstructural characterization of the fibers through tensile testing, SEM of fiber fracture characteristics, scanning Auger depth profiling of fiber surfaces, and TEM of fiber thin sections, as well as their fracture behavior, bonding characteristics, and interfacial compatibility with various glass-ceramic matrix materials. Results of these analyses are discussed. Crystalline SiC fibers, Textron 'Black' fibers, low oxygen Nicalon fibers, SiC fiber/glass-ceramic matrix interfaces, TEM fiber analyses.

  2. Formation of a Buffer Layer for Graphene on C-face SiC{0001} Guowei He, N. Srivastava, and R. M. Feenstra

    E-Print Network [OSTI]

    Feenstra, Randall

    . Feenstra Dept. Physics, Carnegie Mellon University, Pittsburgh, PA 15213 Abstract Graphene films prepared, the formation of interface structures and subsequent graphene films strongly depends on preparation conditions1 Formation of a Buffer Layer for Graphene on C-face SiC{0001} Guowei He, N. Srivastava, and R. M

  3. Substrate doping effects on Raman spectrum of epitaxial graphene on SiC R. Yang, Q. S. Huang, X. L. Chen, G. Y. Zhang,a

    E-Print Network [OSTI]

    Wang, Wei Hua

    Substrate doping effects on Raman spectrum of epitaxial graphene on SiC R. Yang, Q. S. Huang, X. L; published online 2 February 2010 In this paper, we reported a Raman scattering study of epitaxial graphene to the epitaxial graphene. We found that the charge carrier type and concentration of epitaxial graphene can

  4. hal-00131838,version1-19Feb2007 Electron states of mono-and bilayer graphene on SiC probed by STM

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    hal-00131838,version1-19Feb2007 Electron states of mono- and bilayer graphene on SiC probed by STM to mono- and bilayer graphene capping a C-rich interface. At low temperature, both terraces show ( 3 3 close to the Fermi level. We conclude that the metallic states of the first graphene layer are almost

  5. hal-00130698,version1-13Feb2007 Electronic structure of epitaxial graphene layers on SiC: effect of the substrate.

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    hal-00130698,version1-13Feb2007 Electronic structure of epitaxial graphene layers on SiC: effect integer quantum Hall effects expected for isolated graphene sheets. This is the case eventhough the layer-substrate epitaxy of these films implies a strong interface bond that should induce perturbations in the graphene

  6. Ripples in epitaxial graphene on the Si-terminated SiC (0001) surface F.Varchon, P.Mallet, J.-Y.Veuillen, and L.Magaud

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Ripples in epitaxial graphene on the Si-terminated SiC (0001) surface F.Varchon, P.Mallet, J) Interaction with a substrate can modify the graphene honeycomb lattice and thus alter its out- standing properties. This could be particularly true for epitaxial graphene where the carbon layers are grown from

  7. Wettability of Ti3SiC2 by Ag-Cu and Ag-Cu-Ti O. Dezellus,a*

    E-Print Network [OSTI]

    Boyer, Edmond

    represents either carbon or nitrogen) have attracted extensive attention due to their unique combination of metals and ceramic properties [1]. Among these compounds, titanium silicon carbide (Ti3SiC2) has gained nitrogen trap. In the classical sessile drop experiment, coppersilver eutectic alloy droplets of 50 to 100

  8. 2D-simulation and analysis of lateral SiC N-emitter SiGe P-base Schottky metal-collector (NPM) HBT on SOI

    E-Print Network [OSTI]

    Kumar, M. Jagadesh

    2D-simulation and analysis of lateral SiC N-emitter SiGe P-base Schottky metal-collector (NPM) HBT metal-collector NPM HBT on SOI. The proposed lateral NPM HBT performance has been evaluated in detail silicon NPM BJT structures. Based on our simu- lation results, it is observed that while both the lateral

  9. High efficiency battery converter with SiC devices for residential PV Cam Pham, Remus Teodorescu, Tamas Kerekes and Laszlo Mathe

    E-Print Network [OSTI]

    Teodorescu, Remus

    High efficiency battery converter with SiC devices for residential PV systems Cam Pham, Remus, where the generated energy price is relatively high. Smart PV systems with internal battery storage launched a financial support program for residential PV systems with battery storage [2]. Furthermore

  10. Comparison of Graphene Formation on C-face and Si-face SiC {0001} Surfaces Luxmi, N. Srivastava, Guowei He, and R. M. Feenstra

    E-Print Network [OSTI]

    Feenstra, Randall

    1 Comparison of Graphene Formation on C-face and Si-face SiC {0001} Surfaces Luxmi, N. Srivastava of graphene formed on the ( 1000 ) surface (the C-face) and the (0001) surface (the Si-face) of Si) and low-energy electron microscopy (LEEM). The graphene forms due to preferential sublimation of Si from

  11. Gate-Recessed InAlN/GaN HEMTs on SiC Substrate With Al[subscript 2]O[subscript 3] Passivation

    E-Print Network [OSTI]

    Guo, Shiping

    We studied submicrometer (L[subscript G] = 0.15-0.25 ¿m) gate-recessed InAlN/AlN/GaN high-electron mobility transistors (HEMTs) on SiC substrates with 25-nm Al[subscript 2]O[subscript 3] passivation. The combination of ...

  12. Growth of GaN on SiC(0001) by Molecular Beam Epitaxy C. D. LEE (a), ASHUTOSH SAGAR (a), R. M. FEENSTRA

    E-Print Network [OSTI]

    Feenstra, Randall

    years as a substrate for both molecular beam epitaxy (MBE) and metal-organic vapor phase epitaxy of GaN of the substrate preparation and growth technique. Experimental GaN films of typically 1 mm thickness are deposited1 Growth of GaN on SiC(0001) by Molecular Beam Epitaxy C. D. LEE (a), ASHUTOSH SAGAR (a), R. M

  13. An Automatic Brain Tumor Segmentation Tool Idanis Diaz1,4, Pierre Boulanger1, Russell Greiner1,2, Bret Hoehn1,2, Lindsay Rowe3, and Albert Murtha3

    E-Print Network [OSTI]

    Alberta, University of

    ,2, Bret Hoehn1,2, Lindsay Rowe3, and Albert Murtha3 Abstract-- This paper introduces an automatic brain and B. Hoehn are with the Department of Computing Science, University of Alberta. 2 R. Greiner and B. Hoehn are also with the Alberta Innovates Centre for Machine Learning. 3L. Rowe and A. Murtha

  14. Oxidation of Methanol on 2nd and 3rd Row Group VIII Transition Metals (Pt, Ir, Os, Pd, Rh, and Ru): Application to Direct Methanol

    E-Print Network [OSTI]

    Goddard III, William A.

    Oxidation of Methanol on 2nd and 3rd Row Group VIII Transition Metals (Pt, Ir, Os, Pd, Rh, and Ru): Application to Direct Methanol Fuel Cells Jeremy Kua and William A. Goddard III* Contribution from functional theory (B3LYP)], we calculated the 13 most likely intermediate species for methanol oxidation

  15. EUROPIUM s-PROCESS SIGNATURE AT CLOSE-TO-SOLAR METALLICITY IN STARDUST SiC GRAINS FROM ASYMPTOTIC GIANT BRANCH STARS

    SciTech Connect (OSTI)

    Avila, Janaina N.; Ireland, Trevor R.; Holden, Peter [Research School of Earth Sciences, Australian National University, Canberra ACT 0200 (Australia); Lugaro, Maria [Monash Centre for Astrophysics, Monash University, Clayton, VIC 3800 (Australia); Gyngard, Frank; Zinner, Ernst [Laboratory for Space Sciences and the Department of Physics, Washington University, One Brookings Drive, St. Louis, MO 63130 (United States); Cristallo, Sergio [Osservatorio Astronomico di Collurania, INAF, via Maggini snc, Teramo I-64100 (Italy); Rauscher, Thomas, E-mail: janaina.avila@anu.edu.au [Centre for Astrophysics Research, School of Physics, Astronomy, and Mathematics, University of Hertfordshire, Hatfield AL10 9AB (United Kingdom)

    2013-05-01T23:59:59.000Z

    Individual mainstream stardust silicon carbide (SiC) grains and a SiC-enriched bulk sample from the Murchison carbonaceous meteorite have been analyzed by the Sensitive High Resolution Ion Microprobe-Reverse Geometry for Eu isotopes. The mainstream grains are believed to have condensed in the outflows of {approx}1.5-3 M{sub Sun} carbon-rich asymptotic giant branch (AGB) stars with close-to-solar metallicity. The {sup 151}Eu fractions [fr({sup 151}Eu) = {sup 151}Eu/({sup 151}Eu+{sup 153}Eu)] derived from our measurements are compared with previous astronomical observations of carbon-enhanced metal-poor stars enriched in elements made by slow neutron captures (the s-process). Despite the difference in metallicity between the parent stars of the grains and the metal-poor stars, the fr({sup 151}Eu) values derived from our measurements agree well with fr({sup 151}Eu) values derived from astronomical observations. We have also compared the SiC data with theoretical predictions of the evolution of Eu isotopic ratios in the envelope of AGB stars. Because of the low Eu abundances in the SiC grains, the fr({sup 151}Eu) values derived from our measurements show large uncertainties, in most cases being larger than the difference between solar and predicted fr({sup 151}Eu) values. The SiC aggregate yields a fr({sup 151}Eu) value within the range observed in the single grains and provides a more precise result (fr({sup 151}Eu) = 0.54 {+-} 0.03, 95% conf.), but is approximately 12% higher than current s-process predictions. The AGB models can match the SiC data if we use an improved formalism to evaluate the contribution of excited nuclear states in the calculation of the {sup 151}Sm(n, {gamma}) stellar reaction rate.

  16. 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.

  17. Author Select

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem Not Found Item Not Found The itemAIR SEPARATION BYAbrasionAuthor Select Last Name

  18. Author Select

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem Not Found Item Not Found The itemAIR SEPARATION BYAbrasionAuthor Select Last

  19. ,"U.S. Refinery, Bulk Terminal, and Natural Gas Plant Stocks of Selected Petroleum Products"

    U.S. Energy Information Administration (EIA) 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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National and Regional Data; Row: NAICS Codes; Column: Energy SourcesRefinery, Bulk Terminal, and Natural Gas Plant Stocks of Selected Petroleum

  20. ABOUT THE TALK: Has anyone ever put the whole picture of Cannery Row, Monterey, together for you? Don't feel alone if that's the case. ere are few resources easily accessed to get to it all. e PowerPoint archival photographic

    E-Print Network [OSTI]

    McPhee-Shaw, Erika

    PowerPoint archival photographic historical presentation by Cannery Row historian Michael Kenneth Hemp: Berkeley born and UC Educated, Michael Kenneth Hemp became Cannery Row's career historian in a scenario Friends at (831) 771-4464 PHOTO BY RALPH W. SCHARDT An evening with Cannery Row Historian Michael Hemp

  1. Vehicle Technologies Office Merit Review 2015: Advanced Low-Cost SiC and GaN Wide Bandgap Inverters for Under-the-Hood Electric Vehicle Traction Drives

    Broader source: Energy.gov [DOE]

    Presentation given by APEI Inc. at 2015 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about advanced low-cost SiC and GaN wide...

  2. Vehicle Technologies Office Merit Review 2014: Advanced Low-Cost SiC and GaN Wide Bandgap Inverters for Under-the-Hood Electric Vehicle Traction Drives

    Broader source: Energy.gov [DOE]

    Presentation given by APEI Inc. at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about Advanced low-cost SIC and GaN wide...

  3. arXiv:0902.1638v1[cond-mat.mtrl-sci]10Feb2009 Graphene on the C-terminated SiC (000 1) surface: An ab initio F.Varchon,1

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    arXiv:0902.1638v1[cond-mat.mtrl-sci]10Feb2009 Graphene on the C-terminated SiC (000 1) surface and electronic structures of a graphene layer on top of the (2 2) reconstruction of the SiC (0001) surface characteristic of graphene. A small graphene-substrate interaction remains in agreement with scanning tunneling

  4. Formation of nanosized hills on Ti3SiC2 oxide layer irradiated with swift heavy ions J.C. Nappa,

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    of the Gas-cooled Fast Reactor. Among the studied carbides, Ti3SiC2 has the advantage of combining, 28.41.Bm, 81.65.Mq, 68.37.Ps, 68.37.Og, 79.60.-i 1. Introduction The Gas-cooled Fast Reactor (GFR Forum (GIF) [1]. Because of working conditions planned for this reactor high helium pressure, and high

  5. Sputtering of Si, SiC, InAs, InP, Ge, GaAs, GaSb, and GaN by electrosprayed nanodroplets

    SciTech Connect (OSTI)

    Borrajo-Pelaez, Rafael; Grustan-Gutierrez, Enric; Gamero-Castao, Manuel, E-mail: mgameroc@uci.edu [Department of Mechanical and Aerospace Engineering, University of California, Irvine, California 92697 (United States)

    2013-11-14T23:59:59.000Z

    This article presents a characterization of the damage caused by energetic beams of electrosprayed nanodroplets striking the surfaces of single-crystal semiconductors including Si, SiC, InAs, InP, Ge, GaAs, GaSb, and GaN. The sputtering yield (number of atoms ejected per projectile's molecule), sputtering rate, and surface roughness are measured as functions of the beam acceleration potential. The maximum values of the sputtering yields range between 1.9 and 2.2 for the technological important but difficult to etch SiC and GaN respectively, and 4.5 for Ge. The maximum sputtering rates for the non-optimized beam flux conditions used in our experiments vary between 409?nm/min for SiC and 2381?nm/min for GaSb. The maximum sputtering rate for GaN is 630?nm/min. Surface roughness increases modestly with acceleration voltage, staying within 2?nm and 20?nm for all beamlet acceleration potentials and materials except Si. At intermediate acceleration potentials, the surface of Si is formed by craters orders of magnitude larger than the projectiles, yielding surface roughness in excess of 60?nm. The effect of projectile dose is studied in the case of Si. This parameter is correlated with the formation of the large craters typical of Si, which suggests that the accumulation of damage following consecutive impacts plays an important role in the interaction between beamlet and target.

  6. NITROGEN ISOTOPES IN ASYMPTOTIC GIANT BRANCH CARBON STARS AND PRESOLAR SiC GRAINS: A CHALLENGE FOR STELLAR NUCLEOSYNTHESIS

    SciTech Connect (OSTI)

    Hedrosa, R. P.; Abia, C.; Dominguez, I.; Palmerini, S. [Departamento de Fisica Teorica y del Cosmos, Universidad de Granada, E-18071 Granada (Spain); Busso, M. [Dipartimento di Fisica, Universita di Perugia, I-06123 Perugia (Italy); Cristallo, S.; Straniero, O. [INAF, Osservatorio di Collurania, I-64100 Teramo (Italy); Plez, B. [Laboratoire Univers et Particules de Montpellier, Universite Montpellier II, CNRS, F-34095 Montpellier (France)

    2013-05-01T23:59:59.000Z

    Isotopic ratios of C, N, Si, and trace heavy elements in presolar SiC grains from meteorites provide crucial constraints to nucleosynthesis. A long-debated issue is the origin of the so-called A+B grains, as of yet no stellar progenitor thus far has been clearly identified on observational grounds. We report the first spectroscopic measurements of {sup 14}N/{sup 15}N ratios in Galactic carbon stars of different spectral types and show that J- and some SC-type stars might produce A+B grains, even for {sup 15}N enrichments previously attributed to novae. We also show that most mainstream grains are compatible with the composition of N-type stars, but in some cases might also descend from SC stars. From a theoretical point of view, no astrophysical scenario can explain the C and N isotopic ratios of SC-, J-, and N-type carbon stars together, as well as those of many grains produced by them. This poses urgent questions to stellar physics.

  7. A comparison of selected quality and compositional characteristics of brown and white shell eggs

    E-Print Network [OSTI]

    Curtis, Patricia Ann

    1982-01-01T23:59:59.000Z

    . 4 67. 9 68. 0a 67. 2a 66. 8b 63 9 69 0 70. 1 66. 9cde 61. 6 g 55. 78 68, 3 72. 6 a, b Shell color means in each row followed by different letters differ significantly (P~0. 05). c, d, e, f, g ' Period means followed by different letters... OF CONTENTS Page ABSTRACT ACKNOWLEDGEMENTS TABLE OF CONTENTS Vl. LIST OF TABLES CHAPTER I. INTRODUCTION CHAPTER II. LITERATURE REVIEW Shell quality Interior quality Proximate composition Selected nutritional characteristics Shell color 3 5 8 10...

  8. Basal area growth response to competition among improved families of loblolly pine (Pinus taeda L.) in a 20-year-old row plot progeny trial

    E-Print Network [OSTI]

    Lee, Joel Talbot

    1989-01-01T23:59:59.000Z

    T. Sprinz Or. Michael G. Messina In two plantations, over two tsme intervals, tne average basal area growth of individual loblolly pine trees in a row plot progeny trial was modeled as a function of the Area Potentially Available (APA...) competition index, a crown pos1tion 1ndex, and the tree's basal area at the start of the interval. Hypothesis tests for differences in individual tree basal area growth response to competit1on amon9 genetically-1mproved families were performed. When...

  9. Candidate Selection Instrument

    Broader source: Energy.gov [DOE]

    The candidate selection instrument is designed to take the guesswork out of selecting candidates for the various career development programs of interest. The instrument is straightforward and...

  10. Undergraduate Program Selection Process

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

    Selection Process Undergraduate Program Selection Process Point your career towards Los Alamos Lab: work with the best minds on the planet in an inclusive environment that is rich...

  11. Ceramic Technology Project database: September 1990 summary report. [SiC, SiN, whisker-reinforced SiN, ZrO-toughened aluminas, zirconias, joints

    SciTech Connect (OSTI)

    Keyes, B.L.P.

    1992-06-01T23:59:59.000Z

    Data generated within the Ceramic Technology Project (CTP) represent a valuable resource for both research and industry. The CTP database was created to provide easy access to this information in electronic and hardcopy forms by using a computerized database and by issuing periodic hardcopy reports on the database contents. This report is the sixth in a series of semiannual database summaries and covers recent additions to the database, including joined brazed specimen test data. It covers 1 SiC, 34 SiN, 10 whisker-reinforced SiN, 2 zirconia-toughened aluminas, 8 zirconias, and 34 joints.

  12. Effects of pressure, temperature, and hydrogen during graphene growth on SiC(0001) using propane-hydrogen chemical vapor deposition

    SciTech Connect (OSTI)

    Michon, A.; Vezian, S.; Roudon, E.; Lefebvre, D.; Portail, M. [CNRS-CRHEA, Rue Bernard Gregory, 06560 Valbonne (France)] [CNRS-CRHEA, Rue Bernard Gregory, 06560 Valbonne (France); Zielinski, M.; Chassagne, T. [NOVASiC, Savoie Technolac, Arche Bat 4, BP267, 73375 Le Bourget du Lac (France)] [NOVASiC, Savoie Technolac, Arche Bat 4, BP267, 73375 Le Bourget du Lac (France)

    2013-05-28T23:59:59.000Z

    Graphene growth from a propane flow in a hydrogen environment (propane-hydrogen chemical vapor deposition (CVD)) on SiC differentiates from other growth methods in that it offers the possibility to obtain various graphene structures on the Si-face depending on growth conditions. The different structures include the (6{radical}3 Multiplication-Sign 6{radical}3)-R30 Degree-Sign reconstruction of the graphene/SiC interface, which is commonly observed on the Si-face, but also the rotational disorder which is generally observed on the C-face. In this work, growth mechanisms leading to the formation of the different structures are studied and discussed. For that purpose, we have grown graphene on SiC(0001) (Si-face) using propane-hydrogen CVD at various pressure and temperature and studied these samples extensively by means of low energy electron diffraction and atomic force microscopy. Pressure and temperature conditions leading to the formation of the different structures are identified and plotted in a pressure-temperature diagram. This diagram, together with other characterizations (X-ray photoemission and scanning tunneling microscopy), is the basis of further discussions on the carbon supply mechanisms and on the kinetics effects. The entire work underlines the important role of hydrogen during growth and its effects on the final graphene structure.

  13. Rapid silicon outdiffusion from SiC substrates during molecular-beam epitaxial growth of AlGaN/GaN/AlN transistor structures

    SciTech Connect (OSTI)

    Hoke, W.E.; Torabi, A.; Mosca, J.J.; Hallock, R.B.; Kennedy, T.D. [Raytheon RF Components, 362 Lowell Street, Andover, Massachusetts 01810 (United States)

    2005-10-15T23:59:59.000Z

    AlGaN/GaN/AlN transistor structures were grown onto SiC substrates by molecular-beam epitaxy. Under aluminum-rich growth conditions for the AlN nucleation layer, undesirable n-type conduction is observed near the GaN/AlN interface for even thick (>1000 A) AlN layers. Silicon is identified as the unwanted dopant from secondary-ion mass spectroscopy measurements. Atomic force microscopy surface maps reveal free aluminum metal on AlN surfaces grown under modest aluminum-rich conditions. It is proposed that rapid silicon migration is caused by molten aluminum reacting with the SiC substrate resulting in dissolved silicon that rapidly migrates through the growing AlN layer. This behavior is significantly reduced using a growth flux ratio of aluminum to reactive nitrogen close to unity. The resulting buffer leakage current of the GaN high electron mobility transistor structure is reduced by more than four orders of magnitude.

  14. Optical Broadband Angular Selectivity

    E-Print Network [OSTI]

    Shen, Yichen

    Light selection based purely on the angle of propagation is a long-standing scientific challenge. In angularly selective systems, however, the transmission of light usually also depends on the light frequency. We tailored ...

  15. Graduate Program Selection Process

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

    Selection Process Graduate Program Selection Process Point your career towards Los Alamos Lab: work with the best minds on the planet in an inclusive environment that is rich in...

  16. ISOTOPIC ANALYSIS OF SUPERNOVA SiC AND Si{sub 3}N{sub 4} GRAINS FROM THE QINGZHEN (EH3) CHONDRITE

    SciTech Connect (OSTI)

    Lin Yangting [Key Laboratory of the Earth's Deep Interior, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029 (China); Gyngard, Frank; Zinner, Ernst [Laboratory for Space Sciences and the Physics Department, Washington University, St. Louis, MO 63130 (United States)

    2010-02-01T23:59:59.000Z

    We report Al-Mg, Ca, and Ti isotopic data in 16 silicon carbide grains and four silicon nitride grains from the Qingzhen enstatite chondrite. Previous C, N, and Si isotopic measurements had identified these grains as type X grains, believed to have an origin in Type II supernovae (SNe). The grains analyzed include both subtypes X1 and X2. Twelve SiC and three Si{sub 3}N{sub 4} grains show evidence for initial {sup 26}Al, and eight SiC grains evidence for {sup 44}Ti; 11 SiC grains have {sup 49}Ti excesses, possibly indicating the initial presence of {sup 49}V. A correlation with subtype is shown for {sup 44}Ti: X2 grains that have the highest inferred {sup 44}Ti/{sup 48}Ti ratios. A weaker correlation exists for N ratios: X2 grains with {sup 12}C/{sup 13}C > 300 have higher {sup 14}N/{sup 15}N ratios than X1 grains. We compare our data and data from previous reports with the SN models by Rauscher et al. The SN models can explain the C and N isotopic ratios fairly well if material from the {sup 15}N-rich spike in the He/N zone of the 25 M{sub sun} SN model is used. They also can explain the {sup 44}Ti/{sup 48}Ti ratios of the X1 and X2 grains. For the latter, substantial contributions from the inner Ni core are required. They indicate that not for all grains the {sup 49}Ti excesses can be attributed to decay of {sup 49}V and material from the He/C zone, where {sup 49}Ti is produced by neutron capture, is needed. The SN models, however, fail in explaining the Si isotopic ratios of most of the grains in a satisfactory fashion and the distinction between X1 and X2 grains. They also fail in explaining the observed correlation between the {sup 26}Al/{sup 27}Al ratios and {sup 12}C/{sup 13}C (and {sup 14}N/{sup 15}N) ratios.

  17. Tree SelectionTree Selection Why is selection important?

    E-Print Network [OSTI]

    was planned 200 years ago - to give owner and future generations a view of Mississippi River through grove;Tree Selection Style III Process Plan - for the future Purpose - planting goal Ponder - site There are lists from different locations. Utility company Local tree board Native trees #12;Utility Company

  18. Photo-ionization of aluminum in a hot cavity for the selective production of exotic species project

    SciTech Connect (OSTI)

    Scarpa, D., E-mail: Daniele.scarpa@lnl.infn.it; Corradetti, S.; Manzolaro, M.; Vasquez, J.; Calderolla, M.; Rossignoli, M.; Monetti, A.; Andrighetto, A.; Prete, G. [INFN-Laboratori Nazionali di Legnaro, Viale dellUniversit 2, Legnaro (PD) (Italy)] [INFN-Laboratori Nazionali di Legnaro, Viale dellUniversit 2, Legnaro (PD) (Italy); Makhathini, L. [iThemba LABS, Cape Town (South Africa)] [iThemba LABS, Cape Town (South Africa); Tomaselli, A. [Dipartimento di Ingegneria Elettronica, Universit di Pavia, Via Ferrata 1, Pavia (Italy)] [Dipartimento di Ingegneria Elettronica, Universit di Pavia, Via Ferrata 1, Pavia (Italy); Grassi, D. [Dipartimento di Chimica Generale, Universit di Pavia, Via Taramelli 12, Pavia (Italy)] [Dipartimento di Chimica Generale, Universit di Pavia, Via Taramelli 12, Pavia (Italy)

    2014-02-15T23:59:59.000Z

    SPES (Selective Production of Exotic Species) is an Isotope Separation On-Line (ISOL) based accelerator facility that will be built in the Legnaro-Istituto Nazionale di Fisica Nucleare (INFN) Laboratory (Italy), intended to provide intense neutron-rich radioactive ion beams obtained by proton-induced fission of a uranium carbide (UCx) target. Besides this main target material, silicon carbide (SiC) will be the first to be used to deliver p-rich beams. This target will also validate the functionality of the SPES facility with aluminum beam as result of impinging SiC target with proton beam. In the past, off line studies on laser photoionization of aluminum have been performed in Pavia Spectroscopy Laboratory and in Laboratori Nazionali di Legnaro; a XeCl excimer laser was installed in order to test the laser ionization in the SPES hot cavity. With the new Wien filter installed a better characterization of the ionization process in terms of efficiency was performed and results are discussed.

  19. Vertical alignment of liquid crystal through ion beam exposure on oxygen-doped SiC films deposited at room temperature

    SciTech Connect (OSTI)

    Son, Phil Kook; Park, Jeung Hun; Kim, Jae Chang; Yoon, Tae-Hoon; Rho, Soon Joon; Jeon, Back Kyun; Shin, Sung Tae; Kim, Jang Sub; Lim, Soon Kwon [School of Electrical Engineering, Pusan National University, Busan 609-735 (Korea, Republic of); LC/OLED Research Team, LCD R and D Center, LCD Business, Samsung Electronics Co. Ltd., Yongin, Gyeonggi-Do 449-711 (Korea, Republic of); Process Development Team, LCD R and D Center, LCD Business, Samsung Electronics Co. Ltd., Yongin, Gyeonggi-Do 449-711 (Korea, Republic of)

    2007-09-03T23:59:59.000Z

    The authors report the vertical alignment of liquid crystal (LC) through the ion beam exposure on amorphous oxygen-doped SiC (SiOC) film surfaces deposited at room temperature. The optical transmittance of these films was similar to that of polyimide layers, but much higher than that of SiO{sub x} films. The light leakage of a LC cell aligned vertically on SiOC films was much lower than those of a LC cell aligned on polyimide layers or other inorganic films. They found that LC molecules align vertically on ion beam treated SiOC film when the roughness of the electrostatic force microscopy (EFM) data is high on the SiOC film surface, while they align homogeneously when the roughness of the EFM data is low.

  20. The influence of fiber/matrix interface on the mechanical behavior of Nicalon SiC fiber reinforced glass-ceramic composites

    SciTech Connect (OSTI)

    Liu, Y.M.; Mitchell, T.E. [Los Alamos National Lab., NM (United States); Wadley, H.N.G. [Virginia Univ., Charlottesville, VA (United States). Dept. of Materials Science and Engineering

    1996-11-01T23:59:59.000Z

    Mechanical properties of unidirectional Nicalon SiC fiber reinforced Ca aluminosilicate (CAS/SiC) and Mg aluminosilicate (MAS/SiC) glass-ceramic composites were investigated by tensile testing and nondestructive laser-ultrasound technique. The Ba-stuffed MAS was either undoped or doped with 5% borosilicate glass. Degradation of elastic stiffness constant C{sub 11} in transverse direction due to interface damage was monitored in situ by measuring the laser- generated ultrasound wave velocity. The three composite materials show different characteristics of macroscopic deformation behavior, which is correlated strongly to interface degradation. A stronger reduction trend of the elastic constant C{sub 11} is associated with a larger degree of inelastic deformation. The fracture surfaces also reveal the close relation between fiber pullout length and interfacial characteristics. Interfaces of these composites were studied by TEM; their influence on inhibiting and deflecting matrix cracks is discussed.

  1. Selective area growth of Bernal bilayer epitaxial graphene on 4H-SiC (0001) substrate by electron-beam irradiation

    SciTech Connect (OSTI)

    Dharmaraj, P.; Jeganathan, K., E-mail: kjeganathan@yahoo.com [Centre for Nanoscience and Nanotechnology, School of Physics, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu (India); Parthiban, S.; Kwon, J. Y. [School of Integrated Technology and Yonsei Institute of Convergence Technology, Yonsei University, Yeonsu-gu, Incheon 406-840 (Korea, Republic of); Gautam, S.; Chae, K. H. [Advanced Analysis Center, Korea Institute of Science and Technology, Seoul 136-791 (Korea, Republic of); Asokan, K. [Inter University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi 110 067 (India)

    2014-11-03T23:59:59.000Z

    We report selective area growth of large area homogeneous Bernal stacked bilayer epitaxial graphene (BLEG) on 4H-SiC (0001) substrate by electron-beam irradiation. Sublimation of Si occurs by energetic electron irradiations on SiC surface via breaking of SiC bonds in the localized region, which allows the selective growth of graphene. Raman measurements ensure the formation of homogeneous BLEG with weak compressive strain of ?0.08%. The carrier mobility of large area BLEG is ?5100?cm{sup 2}?V{sup ?1}?s{sup ?1} with a sheet carrier density of 2.2??10{sup 13}?cm{sup ?2}. Current-voltage measurements reveal that BLEG on 4H-SiC forms a Schottky junction with an operation at mA level. Our study reveals that the barrier height at the Schottky junction is low (?0.58?eV) due to the Fermi-level pinning above the Dirac point.

  2. Frequency selective infrared sensors

    SciTech Connect (OSTI)

    Davids, Paul; Peters, David W

    2014-11-25T23:59:59.000Z

    A frequency selective infrared (IR) photodetector having a predetermined frequency band. The exemplary frequency selective photodetector includes: a dielectric IR absorber having a first surface and a second surface substantially parallel to the first surface; an electrode electrically coupled to the first surface of the dielectric IR absorber; and a frequency selective surface plasmonic (FSSP) structure formed on the second surface of the dielectric IR absorber. The FSSP structure is designed to selectively transmit radiation in the predetermined frequency band that is incident on the FSSP structure substantially independent of the angle of incidence of the incident radiation on the FSSP structure.

  3. Frequency selective infrared sensors

    DOE Patents [OSTI]

    Davids, Paul; Peters, David W

    2013-05-28T23:59:59.000Z

    A frequency selective infrared (IR) photodetector having a predetermined frequency band. The exemplary frequency selective photodetector includes: a dielectric IR absorber having a first surface and a second surface substantially parallel to the first surface; an electrode electrically coupled to the first surface of the dielectric IR absorber; and a frequency selective surface plasmonic (FSSP) structure formed on the second surface of the dielectric IR absorber. The FSSP structure is designed to selectively transmit radiation in the predetermined frequency band that is incident on the FSSP structure substantially independent of the angle of incidence of the incident radiation on the FSSP structure.

  4. SOURCE SELECTION INFORMATION -

    Office of Environmental Management (EM)

    on Energy and Water Development U.S. House of Representatives The Honorable Lamar Alexander Ranking Member SOURCE SELECTION INFORMATION - SEE FEDERAL ACQUISITION...

  5. SOURCE SELECTION INFORMATION -

    Energy Savers [EERE]

    on Energy and Water Development U.S. House of Representatives The Honorable Lamar Alexander SOURCE SELECTION INFORMATION - SEE FEDERAL ACQUISITION REGULATION (FAR)...

  6. SOURCE SELECTION INFORMATION -

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

    SOURCE SELECTION INFORMATION - SEE FEDERAL ACQUISITION REGULATION (FAR) 2.101 AND 3.104 Department of Energy Washington, DC 20585 (enter date here, centered revised template...

  7. Selecting and Applying Interfacings

    E-Print Network [OSTI]

    2006-05-01T23:59:59.000Z

    Selecting and using interfacing correctly is an important component of garment construction. The various types of interfacing are described and methods of applying them are discussed in detail....

  8. Anything But Routine: A Selectively Annotated Bibliography of William S. Burroughs v. 1.0.

    E-Print Network [OSTI]

    Schottlaender, Brian E.C.

    2008-01-01T23:59:59.000Z

    OU, [1972]. 10? LP record. {M&M G8} ?Valentine [sic] Dayno hardbound issued). G8. . Conversations with William S.

  9. Selectable fragmentation warhead

    SciTech Connect (OSTI)

    Bryan, C.S.; Paisley, D.L.; Montoya, N.I.; Stahl, D.B.

    1992-12-31T23:59:59.000Z

    This report discusses a selectable fragmentation warhead which is capable of producing a predetermined number of fragments from a metal plate, and accelerating the fragments toward a target. A first explosive located adjacent to the plate is detonated at selected number of points by laser-driven slapper detonators. In one embodiment, a smoother-disk and a second explosive, located adjacent to the first explosive, serve to increase acceleration of the fragments toward a target. The ability to produce a selected number of fragments allows for effective destruction of a chosen target.

  10. Determination of the Number of Tube Rows to Obtain Closure for Volume Averaging Theory Based Model of Fin-and-Tube Heat Exchangers

    E-Print Network [OSTI]

    Zhou, Feng; Hansen, Nicholas E; Geb, David J; Catton, Ivan

    2011-01-01T23:59:59.000Z

    can be evaluated for a representative elementary volume (and-tube heat exchanger, representative elementary volumeand (2) on a selected representative elementary volume (REV)

  11. SELECTING INFORMATION TECHNOLOGY SECURITY

    E-Print Network [OSTI]

    April 2004 SELECTING INFORMATION TECHNOLOGY SECURITY PRODUCTS Shirley Radack, Editor Computer Security Division Information Technology Laboratory National Institute of Standards and Technology Information technology security prod ucts are essential to better secure infor mation technology (IT) systems

  12. Solar selective absorption coatings

    DOE Patents [OSTI]

    Mahoney, Alan R. (Albuquerque, NM); Reed, Scott T. (Albuquerque, NM); Ashley, Carol S. (Albuquerque, NM); Martinez, F. Edward (Horseheads, NY)

    2004-08-31T23:59:59.000Z

    A new class of solar selective absorption coatings are disclosed. These coatings comprise a structured metallic overlayer such that the overlayer has a sub-micron structure designed to efficiently absorb solar radiation, while retaining low thermal emissivity for infrared thermal radiation. A sol-gel layer protects the structured metallic overlayer from mechanical, thermal, and environmental degradation. Processes for producing such solar selective absorption coatings are also disclosed.

  13. Solar selective absorption coatings

    DOE Patents [OSTI]

    Mahoney, Alan R. (Albuquerque, NM); Reed, Scott T. (Albuquerque, NM); Ashley, Carol S. (Albuquerque, NM); Martinez, F. Edward (Horseheads, NY)

    2003-10-14T23:59:59.000Z

    A new class of solar selective absorption coatings are disclosed. These coatings comprise a structured metallic overlayer such that the overlayer has a sub-micron structure designed to efficiently absorb solar radiation, while retaining low thermal emissivity for infrared thermal radiation. A sol-gel layer protects the structured metallic overlayer from mechanical, thermal, and environmental degradation. Processes for producing such solar selective absorption coatings are also disclosed.

  14. Spectrally selective glazings

    SciTech Connect (OSTI)

    NONE

    1998-08-01T23:59:59.000Z

    Spectrally selective glazing is window glass that permits some portions of the solar spectrum to enter a building while blocking others. This high-performance glazing admits as much daylight as possible while preventing transmission of as much solar heat as possible. By controlling solar heat gains in summer, preventing loss of interior heat in winter, and allowing occupants to reduce electric lighting use by making maximum use of daylight, spectrally selective glazing significantly reduces building energy consumption and peak demand. Because new spectrally selective glazings can have a virtually clear appearance, they admit more daylight and permit much brighter, more open views to the outside while still providing the solar control of the dark, reflective energy-efficient glass of the past. This Federal Technology Alert provides detailed information and procedures for Federal energy managers to consider spectrally selective glazings. The principle of spectrally selective glazings is explained. Benefits related to energy efficiency and other architectural criteria are delineated. Guidelines are provided for appropriate application of spectrally selective glazing, and step-by-step instructions are given for estimating energy savings. Case studies are also presented to illustrate actual costs and energy savings. Current manufacturers, technology users, and references for further reading are included for users who have questions not fully addressed here.

  15. Fracture mode, microstructure and temperature-dependent elastic moduli for thermoelectric composites of PbTe PbS with SiC nanoparticle additions

    SciTech Connect (OSTI)

    Ni, Jennifer E [ORNL; Case, Eldon D [Michigan State University, East Lansing; Hogan, Timophy P. [Michigan State University, East Lansing; Trejo, Rosa M [ORNL; Lara-Curzio, Edgar [ORNL; Kanatzidis, Mercouri G. [Northwestern University, Evanston

    2013-01-01T23:59:59.000Z

    Twenty-six (Pb0.95Sn0.05Te)0.92(PbS)0.08 0.055% PbI2 SiC nanoparticle (SiCnp) composite thermoelectric specimens were either hot pressed or pulsed electric current sintered (PECS). Bloating (a thermally induced increase in porosity, P, for as-densified specimens) was observed during annealing at temperatures >603 K for hot-pressed specimens and PECS-processed specimens from wet milled powders, but in contrast seven out of seven specimens densified by PECS from dry milled powders showed no observable bloating following annealing at temperatures up to 936 K. In this study, bloating in the specimens was accessed via thermal annealing induced changes in (i) porosity measured by scanning electron microscopy on fractured specimen surfaces, (ii) specimen volume and (iii) elastic moduli. The moduli were measured by resonant ultrasound spectroscopy. SiCnp additions (1 3.5 vol.%) changed the fracture mode from intergranular to transgranular, inhibited grain growth, and limited bloating in the wet milled PECS specimens. Inhibition of bloating likely occurs due to cleaning of contamination from powder particle surfaces via PECS processing which has been reported previously in the literature.

  16. Selected Topics in Column Generation

    E-Print Network [OSTI]

    2002-12-02T23:59:59.000Z

    Dec 2, 2002 ... Page 1. Selected Topics in Column Generation. Marco E. Lbbecke ... is an ever recurring concept in our selected topics. OR/MS Subject...

  17. High Selectivity Oxygen Delignification

    SciTech Connect (OSTI)

    Lucian A. Lucia

    2005-11-15T23:59:59.000Z

    Project Objective: The objectives of this project are as follows: (1) Examine the physical and chemical characteristics of a partner mill pre- and post-oxygen delignified pulp and compare them to lab generated oxygen delignified pulps; (2) Apply the chemical selectivity enhancement system to the partner pre-oxygen delignified pulps under mill conditions (with and without any predetermined amounts of carryover) to determine how efficiently viscosity is preserved, how well selectivity is enhanced, if strength is improved, measure any yield differences and/or bleachability differences; and (3) Initiate a mill scale oxygen delignification run using the selectivity enhancement agent, collect the mill data, analyze it, and propose any future plans for implementation.

  18. 4.8 Row Space

    E-Print Network [OSTI]

    PRETEX (Halifax NS) #1 1054 1999 Mar 05 10:59:16

    2010-02-12T23:59:59.000Z

    Feb 16, 2007 ... For Problems 2631, find the change-of-basis matrix PB?C from the given basis C to the given basis B of the vector space V . 26. V , B, and C...

  19. Solar selective surfaces

    SciTech Connect (OSTI)

    Van Buskirk, O.R.

    1982-01-12T23:59:59.000Z

    Postformable solar selective coatings are disclosed for use on substrates such as aluminum. The coatings use a finely divided black inherently selective spinel pigment such as Co3O4, CuCr2O4 or CuxCo3-xO4 where X is 0.03 to 0.3 and preferably 0.10 to 0.30. The binders are soluble copolymers of vinylidene fluoride or blends thereof or vinylidene fluoride with a copolymer of methyl methacrylate.

  20. Bolt Manufacture: Process Selection

    E-Print Network [OSTI]

    Colton, Jonathan S.

    file Selective Laser Sintering (SLS) 3 D P i ti 3-D Printing Light Engineered Net Shaping (LENS Processes and Systems Prof. J.S. Colton GIT 2009 20 #12;3D Printing Process (Soligen) ME 6222: Manufacturing Processes and Systems Prof. J.S. Colton GIT 2009 21 #12;3D Printing Head (Soligen)3D Printing

  1. antimony selective media: Topics by E-print Network

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

    file server. Figure 1 shows a screen dump of the brows... Lawrence A. Rowe; Brian C. Smith 1992-01-01 70 Social Media Success Guide Biology and Medicine Websites Summary: % of...

  2. Haul truck selection

    SciTech Connect (OSTI)

    Porter, D.

    1993-10-01T23:59:59.000Z

    Haul truck selection involves the consideration of a vast amount of information before the final decision is made. This judgment should not be made simply on the choice of power train, because to go for mechanical or electric drive has always been a case of horses for courses. Some sites are just better suited to electric drive. It could, for instance, be argued that coming out of deep mines with long haul roads is an ideal application for electric drive, but negotiating steep down gradients fully laden would favor mechanical drive. Engine selection on the other hand is easier to define but normally is the direct responsibility of the customer, with the truck manufacturer acting as impartial adviser. Understandably each will offer engines it believes to be well matched to the truck and to the site application requirements. Long term mine planning with careful attention to future equipment requirements is the key to all equipment purchases. This paper discusses the various considerations.

  3. Selecting a Consulting Forester

    E-Print Network [OSTI]

    Taylor, Eric; Foster, C. Darwin

    2005-10-19T23:59:59.000Z

    ER-038 5-06 Selecting a Consulting Forester Eric L. Taylor, Extension Specialist, and C. Darwin Foster, Associate Department Head and Extension Program Leader for Forestry, The Texas A&M University System A consulting forester is an independent... forest management experience does the for- ester have and in what capacity? ? In what professional or forestry-related organizations is the forester an active member? Recognized professional organizations include the Association of Consulting...

  4. Selective ion source

    DOE Patents [OSTI]

    Leung, K.N.

    1996-05-14T23:59:59.000Z

    A ion source is described wherein selected ions maybe extracted to the exclusion of unwanted ion species of higher ionization potential. Also described is a method of producing selected ions from a compound, such as P{sup +} from PH{sub 3}. The invention comprises a plasma chamber, an electron source, a means for introducing a gas to be ionized by electrons from the electron source, means for limiting electron energy from the electron source to a value between the ionization energy of the selected ion species and the greater ionization energy of an unwanted ion specie, and means for extracting the target ion specie from the plasma chamber. In one embodiment, the electrons are generated in a plasma cathode chamber immediately adjacent to the plasma chamber. A small extractor draws the electrons from the plasma cathode chamber into the relatively positive plasma chamber. The energy of the electrons extracted in this manner is easily controlled. The invention is particularly useful for doping silicon with P{sup +}, As{sup +}, and B{sup +} without the problematic presence of hydrogen, helium, water, or carbon oxide ions. Doped silicon is important for manufacture of semiconductors and semiconductor devices. 6 figs.

  5. Selective ion source

    DOE Patents [OSTI]

    Leung, Ka-Ngo (Hercules, CA)

    1996-01-01T23:59:59.000Z

    A ion source is described wherein selected ions maybe extracted to the exclusion of unwanted ion species of higher ionization potential. Also described is a method of producing selected ions from a compound, such as P.sup.+ from PH.sub.3. The invention comprises a plasma chamber, an electron source, a means for introducing a gas to be ionized by electrons from the electron source, means for limiting electron energy from the electron source to a value between the ionization energy of the selected ion species and the greater ionization energy of an unwanted ion specie, and means for extracting the target ion specie from the plasma chamber. In one embodiment, the electrons are generated in a plasma cathode chamber immediately adjacent to the plasma chamber. A small extractor draws the electrons from the plasma cathode chamber into the relatively positive plasma chamber. The energy of the electrons extracted in this manner is easily controlled. The invention is particularly useful for doping silicon with P.sup.+, AS.sup.+, and B.sup.+ without the problematic presence of hydrogen, helium, water, or carbon oxide ions. Doped silicon is important for manufacture of semiconductors and semiconductor devices.

  6. Source Selection Guide

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33Frequently AskedEnergyIssues DOE's Nuclear EnergySmartOverview - 2015 Source Selection

  7. Source Selection Guide

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33Frequently AskedEnergyIssues DOE's Nuclear EnergySmartOverview - 2015 Source Selection

  8. Source Selection Guide

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33Frequently AskedEnergyIssues DOE's Nuclear EnergySmartOverview - 2015 Source Selection32.1

  9. Source Selection Guide

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33Frequently AskedEnergyIssues DOE's Nuclear EnergySmartOverview - 2015 Source Selection32.1

  10. Source Selection Guide

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33Frequently AskedEnergyIssues DOE's Nuclear EnergySmartOverview - 2015 Source Selection32.150.1

  11. Source Selection Guide

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33Frequently AskedEnergyIssues DOE's Nuclear EnergySmartOverview - 2015 Source Selection32.150.1

  12. PDSF Selected Announcements

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)IntegratedSpeeding access toTest andOptimize832 2.860Selected Announcements PDSF

  13. Graduate Program Selection Process

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField8,Dist.NewofGeothermal Heat PumpJorgeAtlGrad. StudentsSelection Process

  14. Sulfur-Free Selective Pulping

    E-Print Network [OSTI]

    Dimmel, D. R.; Bozell, J. J.

    A joint research effort is being conducted on ways to produce cost-effective pulping catalysts from lignin. This project addresses improving selectivities and reducing the levels of sulfur chemicals used in pulping. Improved selectivity means...

  15. Hydrogen-selective membrane

    DOE Patents [OSTI]

    Collins, J.P.; Way, J.D.

    1995-09-19T23:59:59.000Z

    A hydrogen-selective membrane comprises a tubular porous ceramic support having a palladium metal layer deposited on an inside surface of the ceramic support. The thickness of the palladium layer is greater than about 10 {micro}m but typically less than about 20 {micro}m. The hydrogen permeation rate of the membrane is greater than about 1.0 moles/m{sup 2}s at a temperature of greater than about 500 C and a transmembrane pressure difference of about 1,500 kPa. Moreover, the hydrogen-to-nitrogen selectivity is greater than about 600 at a temperature of greater than about 500 C and a transmembrane pressure of about 700 kPa. Hydrogen can be separated from a mixture of gases using the membrane. The method may include the step of heating the mixture of gases to a temperature of greater than about 400 C and less than about 1000 C before the step of flowing the mixture of gases past the membrane. The mixture of gases may include ammonia. The ammonia typically is decomposed to provide nitrogen and hydrogen using a catalyst such as nickel. The catalyst may be placed inside the tubular ceramic support. The mixture of gases may be supplied by an industrial process such as the mixture of exhaust gases from the IGCC process. 9 figs.

  16. Hydrogen-selective membrane

    DOE Patents [OSTI]

    Collins, J.P.; Way, J.D.

    1997-07-29T23:59:59.000Z

    A hydrogen-selective membrane comprises a tubular porous ceramic support having a palladium metal layer deposited on an inside surface of the ceramic support. The thickness of the palladium layer is greater than about 10 {micro}m but typically less than about 20 {micro}m. The hydrogen permeation rate of the membrane is greater than about 1.0 moles/m{sup 2} s at a temperature of greater than about 500 C and a transmembrane pressure difference of about 1,500 kPa. Moreover, the hydrogen-to-nitrogen selectivity is greater than about 600 at a temperature of greater than about 500 C and a transmembrane pressure of about 700 kPa. Hydrogen can be separated from a mixture of gases using the membrane. The method may include the step of heating the mixture of gases to a temperature of greater than about 400 C and less than about 1000 C before the step of flowing the mixture of gases past the membrane. The mixture of gases may include ammonia. The ammonia typically is decomposed to provide nitrogen and hydrogen using a catalyst such as nickel. The catalyst may be placed inside the tubular ceramic support. The mixture of gases may be supplied by an industrial process such as the mixture of exhaust gases from the IGCC process. 9 figs.

  17. New Switches for Utility-Scale Inverters: First In-Class Demonstration of a Completely New Type of SiC Bipolar Switch (15kV-20kV) for Utility-Scale Inverters

    SciTech Connect (OSTI)

    None

    2011-12-31T23:59:59.000Z

    Solar ADEPT Project: The SiCLAB is developing a new power switch for utility-scale PV inverters that would improve the performance and significantly reduce the size, weight, and energy loss of PV systems. A power switch controls the electrical energy flowing through an inverter, which takes the electrical current from a PV solar panel and converts it into the type and amount of electricity that is compatible with the electric grid. SiCLAB is using silicon carbide (SiC) semiconductors in its new power switches, which are more efficient than the silicon semiconductors used to conduct electricity in most conventional power switches today. Switches with SiC semiconductors can operate at much higher temperatures, as well as higher voltage and power levels than silicon switches. SiC-based power switches are also smaller than those made with silicon alone, so they result in much smaller and lighter electrical devices. In addition to their use in utility-scale PV inverters, SiCLABs new power switches can also be used in wind turbines, railways, and other smart grid applications.

  18. A NEW APPROACH TO JOINING SIC/SIC COMPOSITES

    SciTech Connect (OSTI)

    Henager, Charles H.

    2004-06-30T23:59:59.000Z

    A new approach to joining SiC-based ceramics is described and evaluated for Fusion Energy systems. The joining method is based on pre-ceramic polymers filled with reactive and inert filler powders and is similar to other approaches that use such materials. This approach differs in the particular polymer system and in the details of the processing. A principal advantage of this approach relative to other, similar approaches is that the polymer system is easily handled in ambient air and can be processed in air. This makes the joining process simple and field repairable. The joining compound is a liquid that can be painted, sprayed, or applied by dip coating.

  19. Program selects proppants

    SciTech Connect (OSTI)

    Cheng, M.C.A.

    1984-04-30T23:59:59.000Z

    Laboratory-measured proppant flow data must be adjusted prudently to give correct in situ fracture proppant flow capacity data. These in situ data determine the actual performance of the proppant. The well data, fracture geometry, fracture proppant flow capacity, gas price, and proppant cost all determine the selection of an appropriate proppant. For closure stress below 8,000 psi, the choice of either sand or intermediate proppant is affected by all these factors. Thus, intermediate proppant in a well with low closure stress can be more beneficial than sand. A well with closure stress nearing 7,000 psi can use sand and be profitable. Above 8,000 psi closure stress, most experts agree that only intermediate or high strength proppant can be used.

  20. SiC Power Module

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

    So the heat sink system can be smaller and can operate the module under self-heating conditions in a room-temperature ambient environment. F igure 9.12 illustrates a...

  1. man ability sic, is prop

    E-Print Network [OSTI]

    entrainmen al" phase c ocessing. 1) entrain ng natural aneous ph ontrast thes eem to inte eich/Tran e Gehr

  2. EI Summary of SIC 20

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,128 2,469Decade Year-0CubicCubic8 Final

  3. EI Summary of SIC 22

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,128 2,469Decade Year-0CubicCubic8 FinalTextiles (22) All

  4. EI Summary of SIC 23

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,128 2,469Decade Year-0CubicCubic8 FinalTextiles (22)

  5. EI Summary of SIC 24

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,128 2,469Decade Year-0CubicCubic8 FinalTextiles (22)Lumber

  6. EI Summary of SIC 25

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,128 2,469Decade Year-0CubicCubic8 FinalTextiles

  7. EI Summary of SIC 26

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,128 2,469Decade Year-0CubicCubic8 FinalTextilesPaper (26) All

  8. EI Summary of SIC 27

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,128 2,469Decade Year-0CubicCubic8 FinalTextilesPaper (26)

  9. EI Summary of SIC 28

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,128 2,469Decade Year-0CubicCubic8 FinalTextilesPaper

  10. EI Summary of SIC 29

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,128 2,469Decade Year-0CubicCubic8 FinalTextilesPaperRefineries

  11. EI Summary of SIC 30

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,128 2,469Decade Year-0CubicCubic8

  12. EI Summary of SIC 32

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,128 2,469Decade Year-0CubicCubic8Stone, Clay & Glass (32)

  13. EI Summary of SIC 33

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,128 2,469Decade Year-0CubicCubic8Stone, Clay & Glass

  14. EI Summary of SIC 34

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,128 2,469Decade Year-0CubicCubic8Stone, Clay &

  15. EI Summary of SIC 35

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,128 2,469Decade Year-0CubicCubic8Stone, Clay &Machinery

  16. EI Summary of SIC 36

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,128 2,469Decade Year-0CubicCubic8Stone, Clay

  17. EI Summary of SIC 38

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,128 2,469Decade Year-0CubicCubic8Stone, ClayInstruments (38)

  18. EI Summary of SIC 39

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,128 2,469Decade Year-0CubicCubic8Stone, ClayInstruments

  19. SiC Power Module

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del Sol HomeFacebookScholarship Fund3 Outlook for Gulf of MexicoShreyas

  20. Multiprocessor switch with selective pairing

    DOE Patents [OSTI]

    Gara, Alan; Gschwind, Michael K; Salapura, Valentina

    2014-03-11T23:59:59.000Z

    System, method and computer program product for a multiprocessing system to offer selective pairing of processor cores for increased processing reliability. A selective pairing facility is provided that selectively connects, i.e., pairs, multiple microprocessor or processor cores to provide one highly reliable thread (or thread group). Each paired microprocessor or processor cores that provide one highly reliable thread for high-reliability connect with a system components such as a memory "nest" (or memory hierarchy), an optional system controller, and optional interrupt controller, optional I/O or peripheral devices, etc. The memory nest is attached to a selective pairing facility via a switch or a bus

  1. Los Alamos National Laboratory selects

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

    selects small businesses for nuclear waste services February 16, 2012 Subcontract worth up to 200 million over five years LOS ALAMOS, New Mexico, February 16, 2012-Los Alamos...

  2. UESC Best Practices Subcontractor Selection

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

    Best Practices Subcontractor Selection Presented by: Patricia Nardone FEDERAL UTILITY PARTNERSHIP WORKING GROUP SEMINAR May 7 - 8, 2014 Virginia Beach, VA Main Approaches * Utility...

  3. Personalized medicine: selected Web resources

    E-Print Network [OSTI]

    Stimson, Nancy F

    2009-01-01T23:59:59.000Z

    Genomic and Personalized Medicine. 1 st ed. Amsterdam, thePersonalized medicine: selected Web resources Nancy F.Keywords: personalized medicine; personalized health care;

  4. Ex Ante Selection of Disputes for Litigation

    E-Print Network [OSTI]

    Drahozal, Christopher R.

    2004-01-01T23:59:59.000Z

    While selection effects have important implications for empirical studies of the litigation process, existing theories of case selection are incomplete. Existing theories focus on "ex post selection" - selection resulting from choices made...

  5. Guidance on site selection for

    E-Print Network [OSTI]

    harvestingbrash materialfollowingtimber harvestingto supply biomass for heat and power generation. A numberGuidance on site selection for brash removal Forest Research, May 2009 The Research Agency SELECTION FOR BRASH REMOVAL | Forest Research | May 09 #12;Brash Removal Background Interest is growingin

  6. Characterizing Commercial Sites Selected for

    E-Print Network [OSTI]

    such as solar thermal absorption chillers, building energy management systems, and advanced lighting. The twoCharacterizing Commercial Sites Selected for Energy Efficiency Monitoring This report presents data of Commercial Sites Selected for Energy Efficiency Monitoring Prepared for the U.S. Department of Energy Office

  7. STANDARD OPERATING PROCEDURES Site Selection

    E-Print Network [OSTI]

    Fischer, Emily V.

    IMPROVE STANDARD OPERATING PROCEDURES SOP 126 Site Selection Date Last Modified Modified by: 09 References none #12;SOP 126: Site Selection 3 1.0 PURPOSE AND APPLICABILITY This standard operating procedure field conditions, and for ease of operation and maintenance. IMPROVE aerosol samplers are generally

  8. Enhancing inductive learning with feature selection and example selection

    E-Print Network [OSTI]

    Raman, Baranidharan

    2003-01-01T23:59:59.000Z

    independently and as a combined scheme. We propose a sequential search filter approach called Subset selection using Case-based Relevance APproach (SCRAP) for identifying and eliminating irrelevant features. The SCRAP filter addresses the problem of finding a...

  9. Random Selection for Drug Screening

    SciTech Connect (OSTI)

    Center for Human Reliability Studies

    2007-05-01T23:59:59.000Z

    Sampling is the process of choosing some members out of a group or population. Probablity sampling, or random sampling, is the process of selecting members by chance with a known probability of each individual being chosen.

  10. Maps of Selected State Subdivisions

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

    Crude Oil, Natural Gas, and Natural Gas Liquids Proved Reserves Summary Maps of Selected State Subdivisions Map 1: Alaska Map 2: California Map 3: Louisiana Map 4: New Mexico Map...

  11. Natural Selection and Geology 230

    E-Print Network [OSTI]

    Kammer, Thomas

    for different amino acids, which form proteins. #12;Selection Genotypes and phenotypes can be ranked of features. e.g. all primates have 5 fingers; apes and humans lack a tail; all tetrapods have similar limb

  12. Children's Clothes - Size and Selection.

    E-Print Network [OSTI]

    Vanderpoorten, Ann; Kerbel, Claudia

    1980-01-01T23:59:59.000Z

    Tooe ZTA245.7 8-1303 B873 no ? \\'3J~3L-~=============i1 ? ? ? CHILDREN'S CLOTHES, SIZE AND SELECTION ? ~========================~ Texas Agricultural Extension Service. The Texas A&M University System. Daniel C. pfannstiel, Director.... College Station, Texas ," ? (BIaBk Pa,ge in O'rigjaal Bulletinl ' / I' j '. ":SIZE AND SELECTION Ann Vanderpoorten and Claudia Kerbel* Preschool and school-age children have special...

  13. Selection of Equipment for Farms in the Texas High Plains.

    E-Print Network [OSTI]

    Barrick, W. C.; Osborn, J. E.

    1971-01-01T23:59:59.000Z

    ,986.00 27,161 .OO 23,986.00 26,55tS' i Wage rate of $3.25 per hour Variable costs 7,400.82 7,886.86 6,729.00 7,219.56 6,271.63 7,059.61 6,27 1.63 7,025 '- Annual costs 10,350.77 11,209.35 9,929.29 10,766.80 9,353.83 10,549.80" 9,353.83" 10,43c' l... 54.8 12 54.8 12 j? ' Lister planter row 4 29.8 4 29.8 4 29.8 4 2; r Chisel ft 11 29.5 11 29.5 13 24.9 13 21 ' Shredder row 2 18.7 2 18.7 2 18.7 2 li' Cultivator row 4 40.6 4 40.6 4 40.6 4 Li . Rotary hoe row 4 11.1 4 11.1 4 11.1 4 11 Knife...

  14. Materials Selection Considerations for Thermal Process Equipment...

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

    Materials Selection Considerations for Thermal Process Equipment: A BestPractices Process Heating Technical Brief Materials Selection Considerations for Thermal Process Equipment:...

  15. A Selective Sampling Approach to Active Feature Selection

    E-Print Network [OSTI]

    Liu, Huan

    in a filter model setting. We present a formal- ism of selective sampling based on data variance, and apply deterioration. We design ob- jective evaluation measures of performance, conduct extensive experiments using, text mining, customer relationship management, and market basket anal- ysis [2, 35, 43, 44, 55, 57

  16. Adverse Selection and Advantageous Selection in Insurance Markets

    E-Print Network [OSTI]

    Wu, Xi

    2014-08-08T23:59:59.000Z

    . vi LIST OF TABLES ... viii 1. INTRODUCTION .. 1 2. ADVANTAGEOUS SELECTION OF VOLUNTARY PRIVATE HEALTH INSURANCE IN EUROPE: EVIDENCE FROM SHARE .. 3 2.1 Background and Data... .. 6 2.1.1 Institutional Background .. 6 2.1.2 Data Description .. 7 2.2 Empirical Strategy and Results 9 2.3 Conclusion ... 10 3. MULTIPLE DIMENSIONS...

  17. Molecular Components of Catalytic Selectivity

    SciTech Connect (OSTI)

    Somorjai, Gabor A.; Park, Jeong Y.

    2008-07-02T23:59:59.000Z

    Selectivity, that is, to produce one molecule out of many other thermodynamically feasible product molecules, is the key concept to develop 'clean manufacturing' processes that do not produce byproducts (green chemistry). Small differences in potential energy barriers for elementary reaction steps control which reaction channel is more likely to yield the desired product molecule (selectivity), instead of the overall activation energy for the reaction that controls turnover rates (activity). Recent studies have demonstrated the atomic- or molecular-level tailoring of parameters such as the surface structures of active sites that give rise to nanoparticle size and shape dependence of turnover rates and reaction selectivities. Here, we highlight seven molecular components that influence reaction selectivities. These include: surface structure, adsorbate-induced restructuring, adsorbate mobility, reaction intermediates, surface composition, charge transport, and oxidation states for model metal single crystal and colloid nanoparticle catalysts. We show examples of their functioning and describe in-situ instruments that permit us to investigate their roles in surface reactions.

  18. Random Selection for Drug Screening

    SciTech Connect (OSTI)

    Center for Human Reliability Studies

    2007-05-01T23:59:59.000Z

    Simple random sampling is generally the starting point for a random sampling process. This sampling technique ensures that each individual within a group (population) has an equal chance of being selected. There are a variety of ways to implement random sampling in a practical situation.

  19. Selected Program Assisting Master Gardner

    E-Print Network [OSTI]

    Johnson, Eric E.

    with selecting native and non-native grasses that produce forage when irrigated with varying levels of coal bed for health. Use of coal bed methane-produced water for native and non-native grass establishment, economically, or environmentally. Agricultural Science Center at Farmington New Mexico State University P

  20. Selecting a new water heater

    SciTech Connect (OSTI)

    NONE

    1995-03-01T23:59:59.000Z

    This fact sheet describes the types of water heaters available (storage water heaters, demand water heaters, heat pump water heaters, tankless coil and indirect water heaters, and solar water heaters). The criteria for selection are discussed. These are capacity, efficiency rating, and cost. A resource list is provided for further information.

  1. Preparation of gas selective membranes

    DOE Patents [OSTI]

    Kulprathipanja, S.; Kulkarni, S.S.; Funk, E.W.

    1988-06-14T23:59:59.000Z

    Gas separation membranes which possess improved characteristics as exemplified by selectivity and flux may be prepared by coating a porous organic polymer support with a solution or emulsion of a plasticizer and an organic polymer, said coating being effected at subatmospheric pressures in order to increase the penetration depth of the coating material.

  2. Preparation of gas selective membranes

    DOE Patents [OSTI]

    Kulprathipanja, Santi (Hoffman Estates, IL); Kulkarni, Sudhir S. (Hoffman Estates, IL); Funk, Edward W. (Highland Park, IL)

    1988-01-01T23:59:59.000Z

    Gas separation membranes which possess improved characteristics as exemplified by selectivity and flux may be prepared by coating a porous organic polymer support with a solution or emulsion of a plasticizer and an organic polymer, said coating being effected at subatmospheric pressures in order to increase the penetration depth of the coating material.

  3. Selective poly-N-substituted glycine antibiotics

    DOE Patents [OSTI]

    Barron, Annelise E; Czyzewski, Ann M; Dohm, Michelle T; Miller, Tyler M; Zuckermann, Tyler M; Patch, James A; Chongsiriwatana, Nathaniel P

    2013-05-21T23:59:59.000Z

    Antimicrobial peptoid compounds and related compositions as can be used against bacteria effectively and selectively.

  4. All row, planar fault detection system

    DOE Patents [OSTI]

    Archer, Charles Jens; Pinnow, Kurt Walter; Ratterman, Joseph D; Smith, Brian Edward

    2013-07-23T23:59:59.000Z

    An apparatus, program product and method for detecting nodal faults may simultaneously cause designated nodes of a cell to communicate with all nodes adjacent to each of the designated nodes. Furthermore, all nodes along the axes of the designated nodes are made to communicate with their adjacent nodes, and the communications are analyzed to determine if a node or connection is faulty.

  5. Gas turbine row #1 steam cooled vane

    DOE Patents [OSTI]

    Cunha, Frank J. (Longwood, FL)

    2000-01-01T23:59:59.000Z

    A design for a vane segment having a closed-loop steam cooling system is provided. The vane segment comprises an outer shroud, an inner shroud and an airfoil, each component having a target surface on the inside surface of its walls. A plurality of rectangular waffle structures are provided on the target surface to enhance heat transfer between each component and cooling steam. Channel systems are provided in the shrouds to improve the flow of steam through the shrouds. Insert legs located in cavities in the airfoil are also provided. Each insert leg comprises outer channels located on a perimeter of the leg, each outer channel having an outer wall and impingement holes on the outer wall for producing impingement jets of cooling steam to contact the airfoil's target surface. Each insert leg further comprises a plurality of substantially rectangular-shaped ribs located on the outer wall and a plurality of openings located between outer channels of the leg to minimize cross flow degradation.

  6. CSLB ROW Forms | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:EzfeedflagBiomassSustainableCSL Gas Recovery Biomass Facility Jump to: navigation,

  7. " Row: End Uses;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of Energy182 End Uses of4

  8. " Row: End Uses;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of Energy182 End Uses of47

  9. " Row: End Uses;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of Energy182 End Uses of478

  10. " Row: End Uses;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of Energy182 End Uses of4787

  11. " Row: End Uses;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of Energy182 End Uses of47878

  12. " Row: End Uses;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of Energy182 End Uses

  13. " Row: End Uses;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of Energy182 End Uses8 End

  14. " Row: NAICS Codes;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of1

  15. " Row: NAICS Codes;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of12.1. Enclosed Floorspace

  16. " Row: NAICS Codes;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of12.1. Enclosed Floorspace3

  17. " Row: NAICS Codes;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of12.1. Enclosed Floorspace31

  18. " Row: NAICS Codes;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of12.1. Enclosed

  19. " Row: NAICS Codes;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of12.1. Enclosed9.1 Enclosed

  20. " Row: NAICS Codes;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of12.1. Enclosed9.1

  1. " Row: NAICS Codes;"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocksa. Appliances byA49. Total Inputs of12.1.S4.1.4 Number468143

  2. BLM ROW Grant Template | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:EzfeedflagBiomass Conversions Inc JumpIM 2011-003 Jump to: Jump to:Management | OpenBLMROW

  3. Update rows? | OpenEI Community

    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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit withTianlin BaxinUmwelt Management AG UMaAGUnitilMichigan JumpWaterloo UWrows?

  4. Source Selection | 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 onYouTube YouTube Note: Since the.pdfBreakingMayDepartment of EnergySite ScreeningSound Oil CompanySelection

  5. Flynn selected for Achenbach Medal

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC) Environmental Assessments (EA)Budget(DANCE) Target 1 FlightFlynn selected for

  6. Optimization Online - AN ASYMPTOTIC VISCOSITY SELECTION ...

    E-Print Network [OSTI]

    Boushra Abbas

    2015-04-29T23:59:59.000Z

    Apr 29, 2015 ... AN ASYMPTOTIC VISCOSITY SELECTION RESULT FOR THE REGULARIZED NEWTON DYNAMIC. Boushra Abbas(abbas.boushra ***at***...

  7. MIS-based sensors with hydrogen selectivity

    DOE Patents [OSTI]

    Li; ,Dongmei (Boulder, CO); Medlin, J. William (Boulder, CO); McDaniel, Anthony H. (Livermore, CA); Bastasz, Robert J. (Livermore, CA)

    2008-03-11T23:59:59.000Z

    The invention provides hydrogen selective metal-insulator-semiconductor sensors which include a layer of hydrogen selective material. The hydrogen selective material can be polyimide layer having a thickness between 200 and 800 nm. Suitable polyimide materials include reaction products of benzophenone tetracarboxylic dianhydride 4,4-oxydianiline m-phenylene diamine and other structurally similar materials.

  8. Visible Spectrum Incandescent Selective Emitter

    SciTech Connect (OSTI)

    Sonsight Inc.

    2004-04-30T23:59:59.000Z

    The purpose of the work performed was to demonstrate the feasibility of a novel bi-layer selective emitter. Selective emitters are incandescent radiant bodies with emissivities that are substantially larger in a selected part of the radiation spectrum, thereby significantly shifting their radiated spectral distribution from that of a blackbody radiating at the same temperature. The major research objectives involved answering the following questions: (1) What maximum VIS/NIR radiant power and emissivity ratios can be attained at 2650 K? (2) What is the observed emitter body life and how does its performance vary with time? (3) What are the design tradeoffs for a dual heating approach in which both an internally mounted heating coil and electrical resistance self-heating are used? (4) What are the quantitative improvements to be had from utilizing a bi-layer emitter body with a low emissivity inner layer and a partially transmissive outer layer? Two approaches to obtaining selective emissivity were investigated. The first was to utilize large optical scattering within an emitter material with a spectral optical absorption that is much greater within the visible spectrum than that within the NIR. With this approach, an optically thick emitter can radiate almost as if optically thin because essentially, scattering limits the distance below the surface from which significant amounts of internally generated radiation can emerge. The performance of thin emitters was also investigated (for optically thin emitters, spectral emissivity is proportional to spectral absorptivity). These emitters were fabricated from thin mono-layer emitter rods as well as from bi-layer rods with a thin emitter layer mounted on a substrate core. With an initially estimated energy efficiency of almost three times that of standard incandescent bulbs, a number of energy, economic and environmental benefits such as less energy use and cost, reduced CO{sub 2} emissions, and no mercury contamination was initially projected. The work performed provided answers to a number of important questions. The first is that, with the investigated approaches, the maximum sustained emitter efficiencies are about 1.5 times that of a standard incandescent bulb. This was seen to be the case for both thick and thin emitters, and for both mono-layer and bi-layer designs. While observed VIS/NIR ratios represent improvements over standard incandescent bulbs, it does not appear sufficient to overcome higher cost (i.e. up to five times that of the standard bulb) and ensure commercial success. Another result is that high temperatures (i.e. 2650 K) are routinely attainable without platinum electrodes. This is significant for reducing material costs. A novel dual heating arrangement and insulated electrodes were used to attain these temperatures. Another observed characteristic of the emitter was significant grain growth soon after attaining operating temperatures. This is an undesirable characteristic that results in substantially less optical scattering and spectral selectivity, and which significantly limits emitter efficiencies to the values reported. Further work is required to address this problem.

  9. Black nickel selective absorber, optimization of parameters

    SciTech Connect (OSTI)

    Akinoglu, B.; Cercioglu, V.; Ecevit, A.

    1983-12-01T23:59:59.000Z

    Electroplated black nickel selective absorber is one of the most commercially used element of solar energy systems. Electrodeposition parameters such as time of deposition, pH, current density, electrolyte temperature should be optimized to produce the most efficient selective absorber. The topology of the substrate material is very effective on selectivity and it should also be optimized. In this study, by controlling the conditions of electrodeposition black nickel selective absorbers are produced and their reflectivities are measured. The effects of the electrodeposition parameters together with the topology of the substrate, on the selective properties are investigated.

  10. Selective photoionisation of lutetium isotopes

    SciTech Connect (OSTI)

    D'yachkov, Aleksei B; Kovalevich, S K; Labozin, Valerii P; Mironov, Sergei M; Panchenko, Vladislav Ya; Firsov, Valerii A; Tsvetkov, G O; Shatalova, G G [National Research Centre 'Kurchatov Institute', Moscow (Russian Federation)

    2012-10-31T23:59:59.000Z

    A three-stage laser photoionisation scheme intended for enriching the {sup 176}Lu isotope from natural lutetium was considered. An investigation was made of the hyperfine structure of the second excited state 5d6s7s {yields} {sup 4}D{sub 3/2} with an energy of 37194 cm{sup -1} and the autoionisation state with an energy of 53375 cm{sup -1} of the {sup 176}Lu and {sup 175}Lu isotopes. The total electron momentum of the autoionisation level and the constant A of hyperfine magnetic interaction were determined. Due to a small value of the isotopic shift between {sup 176}Lu and {sup 175}Lu, appreciable selectivity of their separation may be achieved with individual hyperfine structure components. The first tentative enrichment of the 176Lu isotope was performed to a concentration of 60 % - 70 %. (laser applications and other topics in quantum electronics)

  11. Hydrogen Selective Exfoliated Zeolite Membranes

    SciTech Connect (OSTI)

    Tsapatsis, Michael; Daoutidis, Prodromos; Elyassi, Bahman; Lima, Fernando; Iyer, Aparna; Agrawal, Kumar; Sabnis, Sanket

    2014-09-30T23:59:59.000Z

    The objective of this project was to develop and evaluate an innovative membrane technology at process conditions that would be representative of Integrated Gasification Combined Cycle (IGCC) advanced power generation with pre-combustion capture of carbon dioxide (CO2). This research focused on hydrogen (H2)-selective zeolite membranes that could be utilized to separate conditioned syngas into H2-rich and CO2-rich components. Both experiments and process design and optimization calculations were performed to evaluate the concept of ultra-thin membranes made from zeolites nanosheets. In this work, efforts in the laboratory were made to tackle two fundamental challenges in application of zeolite membranes in harsh industrial environments, namely, membrane thickness and membrane stability. Conventional zeolite membranes have thicknesses in the micron range, limiting their performance. In this research, we developed a method for fabrication of ultimately thin zeolite membranes based on zeolite nanosheets. A range of layered zeolites (MWW, RWR, NSI structure types) suitable for hydrogen separation was successfully exfoliated to their constituent nanosheets. Further, membranes were made from one of these zeolites, MWW, to demonstrate the potential of this group of materials. Moreover, long-term steam stability of these zeolites (up to 6 months) was investigated in high concentrations of steam (35 mol% and 95 mole%), high pressure (10 barg), and high temperatures (350 oC and 600 oC) relevant to conditions of water-gas-shift and steam methane reforming reactions. It was found that certain nanosheets are stable, and that stability depends on the concentration of structural defects. Additionally, models that represent a water-gas-shift (WGS) membrane reactor equipped with the zeolite membrane were developed for systems studies. These studies had the aim of analyzing the effect of the membrane reactor integration into IGCC plants in terms of performance and economic aspects of the plants. Specifically, simulation and design optimization studies were performed using the developed stand-alone membrane reactor models to identify the membrane selectivity and permeance characteristics necessary to achieve desired targets of CO2 capture and H2 recovery, as well as guide the selection of the optimal reactor design that minimizes the membrane cost as a function of its surface area required. The isothermal membrane reactor model was also integrated into IGCC system models using both the MATLAB and Aspen software platforms and techno-economic analyses of the integrated plants have been carried out to evaluate the feasibility of replacing current technologies for pre-combustion capture by the proposed novel approach in terms of satisfying stream constraints and achieving the DOE target goal of 90% CO2 capture. The results of the performed analyses based on present value of annuity calculations showed break even costs for the membrane reactor within the feasible range for membrane fabrication. However, the predicted membrane performance used in these simulations exceeded the performance achieved experimentally. Therefore, further work is required to improve membrane performance.

  12. Development of vanadium-phosphate catalysts for methanol production by selective oxidation of methane. Quarterly technical progress report 10, July 1, 1995--September 31, 1995

    SciTech Connect (OSTI)

    McCormick, R.L.

    1995-12-07T23:59:59.000Z

    This document is the tenth quarterly technical progress report under Contract No. DE-AC22-92PC92110 {open_quotes}Development of Vanadium-Phosphate Catalysts for Methanol Production by Selective Oxidation of Methane{close_quotes}. Activities focused on testing of additional modified and promoted catalysts and characterization of these materials. Attempts at improving the sensitivity of our GC based analytical systems were also made with some success. Methanol oxidation studies were initiated. These results are reported. Specific accomplishments include: (1) Methane oxidation testing of a suite of catalysts promoted with most of the first row transition metals was completed. Several of these materials produced low, difficult to quantify yields of formaldehyde. (2) Characterization of these materials by XRD and FTIR was performed with the goal of correlating activity and selectivity with catalyst properties. (3) We began to characterize catalysts prepared via modified synthesis methods designed to enhance acidity using TGA measurements of acetonitrile chemisorption and methanol dehydration to dimethyl ether as a test reaction. (4) A catalyst prepared in the presence of naphthalene methanol as a structural disrupter was tested for activity in methane oxidation. It was found that this material produced low yields of formaldehyde which were difficult to quantify. (5) Preparation of catalysts with no Bronsted acid sites. This was accomplished by replacement of exchangeable protons with potassium, and (6) Methanol oxidation studies were initiated to provide an indication of catalyst activity for decomposition of this desired product and as a method of characterizing the catalyst surface.

  13. Personnel Selection, Training, Qualification, and Certification...

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

    6.2 Admin Chg 1, Personnel Selection, Training, Qualification, and Certification Requirements for DOE Nuclear Facilities by Sam Rosenbloom Functional areas: Administrative Change,...

  14. Personnel Selection, Training, Qualification, and Certification...

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

    6.2, Personnel Selection, Training, Qualification, and Certification Requirements for DOE Nuclear Facilities by Sam Rosenbloom Functional areas: Safety, The order establishes...

  15. Bifunctional Catalysts for the Selective Catalytic Reduction...

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

    as Reductants Bifunctional Catalysts for the Selective Catalytic Reduction of NO by Hydrocarbons Development of Optimal Catalyst Designs and Operating Strategies for Lean NOx...

  16. Bifunctional Catalysts for the Selective Catalytic Reduction...

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

    Publications Bifunctional Catalysts for the Selective Catalytic Reduction of NO by Hydrocarbons Selectlive Catalytic Reducution of NOx wilth Diesel-Based Fuels as Reductants...

  17. AN ASYMPTOTIC VISCOSITY SELECTION RESULT FOR THE ...

    E-Print Network [OSTI]

    2015-04-29T23:59:59.000Z

    Apr 29, 2015 ... viscosity selection properties for the regularized Newton dynamic governed by ?. Let us first recall some basic facts about this dynamical...

  18. High temperature solar selective coatings

    DOE Patents [OSTI]

    Kennedy, Cheryl E

    2014-11-25T23:59:59.000Z

    Improved solar collectors (40) comprising glass tubing (42) attached to bellows (44) by airtight seals (56) enclose solar absorber tubes (50) inside an annular evacuated space (54. The exterior surfaces of the solar absorber tubes (50) are coated with improved solar selective coatings {48} which provide higher absorbance, lower emittance and resistance to atmospheric oxidation at elevated temperatures. The coatings are multilayered structures comprising solar absorbent layers (26) applied to the meta surface of the absorber tubes (50), typically stainless steel, topped with antireflective Savers (28) comprising at least two layers 30, 32) of refractory metal or metalloid oxides (such as titania and silica) with substantially differing indices of refraction in adjacent layers. Optionally, at least one layer of a noble metal such as platinum can be included between some of the layers. The absorbent layers cars include cermet materials comprising particles of metal compounds is a matrix, which can contain oxides of refractory metals or metalloids such as silicon. Reflective layers within the coating layers can comprise refractory metal silicides and related compounds characterized by the formulas TiSi. Ti.sub.3SiC.sub.2, TiAlSi, TiAN and similar compounds for Zr and Hf. The titania can be characterized by the formulas TiO.sub.2, Ti.sub.3O.sub.5. TiOx or TiO.sub.xN.sub.1-x with x 0 to 1. The silica can be at least one of SiO.sub.2, SiO.sub.2x or SiO.sub.2xN.sub.1-x with x=0 to 1.

  19. Spectral optical properties of selected photosynthetic microalgae producing biofuels

    E-Print Network [OSTI]

    Lee, Euntaek; Heng, Ri-Liang; Pilon, Laurent

    2013-01-01T23:59:59.000Z

    Biochemical composition of microalgae from the green algalof Selected Photosynthetic Microalgae Producing Biofuelsof Selected Photosyn- thetic Microalgae Producing Biofuels,

  20. Neural Mechanisms Underlying Selective Attention to Threat

    E-Print Network [OSTI]

    Bishop, Sonia

    Neural Mechanisms Underlying Selective Attention to Threat SONIA J. BISHOP Behavioural and Clinical. This provides a framework for inves- tigating the neural mechanisms underlying selective attention to threat. Both subcortical regions implicated in threat detection--specifically the amygdala--and prefrontal

  1. NEW ENERGETIC SELECTION PRINCIPLE IN DIFFERENTIAL EVOLUTION

    E-Print Network [OSTI]

    Boyer, Edmond

    NEW ENERGETIC SELECTION PRINCIPLE IN DIFFERENTIAL EVOLUTION Vitaliy Feoktistov Centre de Recherche and convergence. In this paper we introduce a new principle of Energetic Selection. It consists in both decreasing the population size and the computation efforts according to an energetic barrier function which depends

  2. Symbolic Test Selection Based on Approximate Analysis

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Symbolic Test Selection Based on Approximate Analysis Bertrand Jeannet, Thierry Jeron, Vlad Rusu}@irisa.fr Abstract. This paper addresses the problem of generating symbolic test cases for testing the conformance. The challenge we consider is the selection of test cases according to a test purpose, which is here a set

  3. DAMS: Distributed Adaptive Metaheuristic Selection Bilel Derbel

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    DAMS: Distributed Adaptive Metaheuristic Selection Bilel Derbel Universit Lille 1 LIFL CNRS Metaheuristic Selection (DAMS) frame- work. DAMS is dedicated to adaptive optimization in distributed environments. Given a set of metaheuristics, the goal of DAMS is to coordinate their local execution

  4. Liquid Biofuels Strategies and Policies in selected

    E-Print Network [OSTI]

    June 2011 Liquid Biofuels Strategies and Policies in selected African Countries A review of some of the challenges, activities and policy options for liquid biofuels Prepared for PISCES by Practical Action Biofuels Strategies and Policies in selected African Countries Although this research is funded by DFID

  5. Automated ConstraintBased Nucleotide Sequence Selection

    E-Print Network [OSTI]

    Gifford, David K.

    Automated Constraint­Based Nucleotide Sequence Selection for DNA Computation Alexander J. Hartemink computational melting temper­ ature primitive to search a ``nucleotide space'' for sequences satisfying a pre that offer the promise of an efficient method for selecting optimal nucleotide sequences in an automated

  6. Automated Constraint-Based Nucleotide Sequence Selection

    E-Print Network [OSTI]

    Gifford, David K.

    Automated Constraint-Based Nucleotide Sequence Selection for DNA Computation Alexander J. Hartemink computational melting temperature primitive to search a "nucleotide space" for sequences satisfying a pre that offer the promise of an efficient method for selecting optimal nucleotide sequences in an automated

  7. Selective purge for hydrogenation reactor recycle loop

    DOE Patents [OSTI]

    Baker, Richard W. (Palo Alto, CA); Lokhandwala, Kaaeid A. (Union City, CA)

    2001-01-01T23:59:59.000Z

    Processes and apparatus for providing improved contaminant removal and hydrogen recovery in hydrogenation reactors, particularly in refineries and petrochemical plants. The improved contaminant removal is achieved by selective purging, by passing gases in the hydrogenation reactor recycle loop or purge stream across membranes selective in favor of the contaminant over hydrogen.

  8. Process for selecting engineering tools : applied to selecting a SysML tool.

    SciTech Connect (OSTI)

    De Spain, Mark J.; Post, Debra S. (Sandia National Laboratories, Livermore, CA); Taylor, Jeffrey L.; De Jong, Kent

    2011-02-01T23:59:59.000Z

    Process for Selecting Engineering Tools outlines the process and tools used to select a SysML (Systems Modeling Language) tool. The process is general in nature and users could use the process to select most engineering tools and software applications.

  9. Combining ability of selected maize (Zea mays L.) lines under diverse environmental conditions

    E-Print Network [OSTI]

    Celicard, Zonkeng Guepi

    1991-01-01T23:59:59.000Z

    long, with a row-to-row spacing of 1 m and a plant-to-plant distance of 0. 20 m. A diallel analysis was performed to determine the GCA and SCA and estimate their interactions with the environment. The combined analysis of combining ability showed... interaction with the environment. For days to silk, both GCA and SCA were stable across environments. For plant height, seed weight, grain yield, and test weight, only GCA interacted with the environment. Two inbreds (Va99 and Tx706) were the most...

  10. Combining ability of selected maize (Zea mays L.) lines under diverse environmental conditions

    E-Print Network [OSTI]

    Celicard, Zonkeng Guepi

    1991-01-01T23:59:59.000Z

    long, with a row-to-row spacing of 1 m and a plant-to-plant distance of 0. 20 m. A diallel analysis was performed to determine the GCA and SCA and estimate their interactions with the environment. The combined analysis of combining ability showed... interaction with the environment. For days to silk, both GCA and SCA were stable across environments. For plant height, seed weight, grain yield, and test weight, only GCA interacted with the environment. Two inbreds (Va99 and Tx706) were the most...

  11. An operational link between MUBs and SICs

    E-Print Network [OSTI]

    Roberto Beneduci; Tom Bullock; Paul Busch; Claudio Carmeli; Teiko Heinosaari; Alessandro Toigo

    2013-09-24T23:59:59.000Z

    We exhibit an operational connection between mutually unbiased bases and symmetric infomationally complete positive operator-valued measures. Assuming that the latter exists, we show that there is a strong link between these two structures in all prime power dimensions. We also demonstrate that a similar link cannot exists in dimension 6.

  12. Good-Bye, SIC - Hello, NAICS

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40Coal Stocks at1,066,688Electricity UseFoot) YearNetper ThousandMar 2,

  13. EI Summary of All Manufacturing SIC

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,128 2,469Decade Year-0CubicCubic8 Final May8,4983,8027,603All

  14. Selective catalyst reduction light-off strategy

    DOE Patents [OSTI]

    Gonze, Eugene V [Pinckney, MI

    2011-10-18T23:59:59.000Z

    An emissions control system includes a temperature determination module and an emissions control module. The temperature determination module determines a first temperature of a heater element of a diesel particulate filter (DPF) assembly in an exhaust system and determines a second temperature of a catalyst of the DPF assembly. The emissions control module selectively activates the heater element, selectively initiates a predefined combustion process in an engine based upon the first temperature, and selectively starts a reductant injection process based upon the second temperature.

  15. Commissioning of the ATLAS Muon Trigger Selection

    E-Print Network [OSTI]

    Elisa Musto

    2010-09-30T23:59:59.000Z

    The performance of the three-level ATLAS muon trigger as evaluated by using LHC data is presented. Events have been selected by using only the hardware-based Level-1 trigger in order to commission and to subsequently enable the (software-based) selections of the High Level Trigger. Studies aiming at selecting prompt muons from J/{\\psi} and at reducing non prompt muon contamination have been performed. A brief overview on how the muon triggers evolve with increasing luminosity is given.

  16. Surface selective membranes for carbon dioxide separation

    SciTech Connect (OSTI)

    Luebke, D.R.; Pennline, H.W.; Myers, C.R.

    2005-09-01T23:59:59.000Z

    In this study, hybrid membranes have been developed for the selective separation of CO2 from mixtures containing H2. Beginning with commercially available Pall alumina membrane tubes with nominal pore diameter of 5 nm, hybrids were produced by silation with a variety of functionalities designed to facilitate the selective adsorption of CO2 onto the pore surface. The goal is to produce a membrane which can harness the power of surface diffusion to give the selectivity of polymer membranes with the permeance of inorganic membranes.

  17. Selective irradiation of the vascular endothelium

    E-Print Network [OSTI]

    Schuller, Bradley W

    2007-01-01T23:59:59.000Z

    We developed a unique methodology to selectively irradiate the vascular endothelium in vivo to better understand the role of vascular damage in causing normal tissue radiation side-effects.The relationship between vascular ...

  18. COMMENTARY Open Access Effectively incorporating selected multimedia

    E-Print Network [OSTI]

    Hammerton, James

    COMMENTARY Open Access Effectively incorporating selected multimedia content into medical Schbel5 , Markus Sellerer6 , Andreas Ziegler1 Abstract Until fairly recently, medical publications have significantly profit from advances in electronic publishing that permit the inclusion of multimedia content

  19. Deep Borehole Disposal Research: Demonstration Site Selection...

    Office of Environmental Management (EM)

    Site Selection Guidelines, Borehole Seals Design, and RD&D Needs The U.S. Department of Energy has been investigating deep borehole disposal as one alternative for the disposal...

  20. Molecular Selectivity of Brown Carbon Chromophores. | EMSL

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

    of strong brown carbon chromophores. Citation: Laskin J, A Laskin, S Nizkorodov, PJ Roach, PA Eckert, MK Gilles, B Wang, HJ Lee, and Q Hu.2014."Molecular Selectivity of Brown...

  1. Variable Selection for Ultra High Dimensional Data

    E-Print Network [OSTI]

    Song, Qifan

    2014-05-29T23:59:59.000Z

    of the proposed approach have been made with the penalized likelihood approaches, such as Lasso, elastic net, SIS and ISIS. The numerical results show that the proposed approach generally outperforms the penalized likelihood approaches. The models selected...

  2. Adult attachment and selective information seeking

    E-Print Network [OSTI]

    Tran, Sisi

    2003-01-01T23:59:59.000Z

    . While placed in an anxiety provoking task, the participants received either a supportive or ambiguous note from their partners. Following the receipt of this note, the participants were given an opportunity to select information about their partners...

  3. System architecture analysis and selection under uncertainty

    E-Print Network [OSTI]

    Smaling, Rudolf M

    2005-01-01T23:59:59.000Z

    A system architecture analysis and selection methodology is presented that builds on the Multidisciplinary Analysis and Optimization framework. It addresses a need and opportunity to extend the MAO techniques to include a ...

  4. Finding Fingerprints of Selection in Poplar Genomes

    SciTech Connect (OSTI)

    Tuskan, Gerald

    2014-10-02T23:59:59.000Z

    Jerry Tuskan of Oak Ridge National Laboratory and the DOE JGI talks about poplar trees as models for selective adaptation to an environment. This video complements a study published ahead online August 24, 2014 in Nature Genetics.

  5. Finding Fingerprints of Selection in Poplar Genomes

    ScienceCinema (OSTI)

    Tuskan, Gerald

    2014-10-28T23:59:59.000Z

    Jerry Tuskan of Oak Ridge National Laboratory and the DOE JGI talks about poplar trees as models for selective adaptation to an environment. This video complements a study published ahead online August 24, 2014 in Nature Genetics.

  6. Material and processes selection in conceptual design

    E-Print Network [OSTI]

    Krishnakumar, Karthikeyan

    2005-02-17T23:59:59.000Z

    Materials and manufacturing processes are an integral part of the design of a product. The need to combine materials and manufacturing processes selection during the early stages of the design has previously been realized. The work that generally...

  7. Tool developing of MRR strategy selection

    E-Print Network [OSTI]

    Liu, Juanyu

    2001-01-01T23:59:59.000Z

    . . . 18 7 A Framework for Selecting Strategies for MRR of Rigid Pavements . 25 Decision Process for Selecting MRR Strategies . . . . . 26 9 Traffic Volumes ? Construction Time Tolerance Chart. . . . 31 10 Work Zone User Cost Components . 11 Free... transfer is directly related to the assessment of remaining life and life extension of the pavement. In characterizing structural conditions of pavements, the following types of field information regarding the existing pavement structure is necessary (8...

  8. Desorption of hexachlorobiphenyl from selected particulate matter

    E-Print Network [OSTI]

    Rorschach, Reagan Cartwright

    1989-01-01T23:59:59.000Z

    DESORPTION OF HEXACHLOROBIPHENYL FROM SELECTED PARTICULATE MATTER A Thesis by REAGAN CARTWRIGHT RORS CHACH Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE December 1989 Major Subject: Civil Engineering DESORPTION OF HEXACHLOROBIPHENYL FROM SELECTED PARTICULATE MATTER A Thesis by REAGAN C. RORSCHACH Approved as to style and content by: Robin L. Autenrieth (Chair of Committee...

  9. Optical selection and collection of DNA fragments

    DOE Patents [OSTI]

    Roslaniec, Mary C. (Los Alamos, NM); Martin, John C. (Los Alamos, NM); Jett, James H. (Los Alamos, NM); Cram, L. Scott (Los Alamos, NM)

    1998-01-01T23:59:59.000Z

    Optical selection and collection of DNA fragments. The present invention includes the optical selection and collection of large (>.mu.g) quantities of clonable, chromosome-specific DNA from a sample of chromosomes. Chromosome selection is based on selective, irreversible photoinactivation of unwanted chromosomal DNA. Although more general procedures may be envisioned, the invention is demonstrated by processing chromosomes in a conventional flow cytometry apparatus, but where no droplets are generated. All chromosomes in the sample are first stained with at least one fluorescent analytic dye and bonded to a photochemically active species which can render chromosomal DNA unclonable if activated. After passing through analyzing light beam(s), unwanted chromosomes are irradiated using light which is absorbed by the photochemically active species, thereby causing photoinactivation. As desired chromosomes pass this photoinactivation point, the inactivating light source is deflected by an optical modulator; hence, desired chromosomes are not photoinactivated and remain clonable. The selection and photoinactivation processes take place on a microsecond timescale. By eliminating droplet formation, chromosome selection rates 50 times greater than those possible with conventional chromosome sorters may be obtained. Thus, usable quantities of clonable DNA from any source thereof may be collected.

  10. A SOLAR TEST COLLECTOR FOR EVALUATION OF BOTH SELECTIVE AND NON-SELECTIVE ABSORBERS

    E-Print Network [OSTI]

    Lampert, Carl M.

    2011-01-01T23:59:59.000Z

    SECTION A SOLAR TEST COLLECTOR FOR EVALUTATION OF BOTHStandards for Testing Solar Collectors and Thermal StorageSelective Coating Applied to Collector Design, Proceedings

  11. Audit of Selected Hazardous Waste Remedial Actions Program Costs...

    Office of Environmental Management (EM)

    of Selected Hazardous Waste Remedial Actions Program Costs, ER-B-97-04 Audit of Selected Hazardous Waste Remedial Actions Program Costs, ER-B-97-04 Audit of Selected Hazardous...

  12. Hierarchical multi-touch selection techniques for collaborative geospatial analysis

    E-Print Network [OSTI]

    Wartell, Zachary

    Hierarchical multi-touch selection techniques for collaborative geospatial analysis Thomas and military use. Keywords: Multi-touch, hierarchical selection, geospatial analysis, GIS, collaborative selection of complex regions-of-interest within a hierarchical geospatial environment, as well as methods

  13. Selective Electroless Nickel Plating of Particle Arrays on Polyelectrolyte Multilayers

    E-Print Network [OSTI]

    Lee, Ilsoon

    Selective Electroless Nickel Plating of Particle Arrays on Polyelectrolyte Multilayers Ilsoon Lee Received June 30, 2003. Revised Manuscript Received September 25, 2003 Selective electroless nickel plating and particles. Selectively nickel-plated surfaces were characterized with optical microscopy, X

  14. ORIGINAL PAPER Selection, trans-species polymorphism, and locus identification

    E-Print Network [OSTI]

    Zamudio, Kelly R.

    ORIGINAL PAPER Selection, trans-species polymorphism, and locus identification of major amphibian populations. Keywords Amphibia . Beta chain . Gene walking . Lithobates . Positive selection balancing selection Electronic supplementary material The online version of this article (doi:10.1007/s00251

  15. DOE Office of Nuclear Energy Transportation Planning, Route Selection...

    Office of Environmental Management (EM)

    DOE Office of Nuclear Energy Transportation Planning, Route Selection, and Rail Issues DOE Office of Nuclear Energy Transportation Planning, Route Selection, and Rail Issues...

  16. Laser Control of Desorption Through Selective Surface Excitation...

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

    Control of Desorption Through Selective Surface Excitation. Laser Control of Desorption Through Selective Surface Excitation. Abstract: We review recent developments in controlling...

  17. DOE Selects Seven Contractors for Waste Treatment Basic Ordering...

    Office of Environmental Management (EM)

    Selects Seven Contractors for Waste Treatment Basic Ordering Agreements DOE Selects Seven Contractors for Waste Treatment Basic Ordering Agreements June 4, 2015 - 12:00pm Addthis...

  18. Advanced Combustion R&D Selections | Department of Energy

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

    of Energy made several project selections under the Fossil Energy Advanced Combustion R&D program. Through these four selections, nearly 37 million - 26 million from...

  19. Recovery Act Selections for Smart Grid Investment Grant Awards...

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

    State - Updated November 2011 Recovery Act Selections for Smart Grid Investment Grant Awards - By State - Updated November 2011 List of selections for the Smart Grid Investment...

  20. Recovery Act Selections for Smart Grid Investment Grant Awards...

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

    Category Updated November 2011 Recovery Act Selections for Smart Grid Investment Grant Awards - By Category Updated November 2011 List of selections for the Smart Grid Investment...

  1. Recovery Act Selections for Smart Grid Invesment Grant Awards...

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

    Recovery Act Selections for Smart Grid Invesment Grant Awards- By Category Updated July 2010 Recovery Act Selections for Smart Grid Invesment Grant Awards- By Category Updated July...

  2. Materials Down Select Decisions Made Within DOE's Chemical Hydrogen...

    Energy Savers [EERE]

    Materials Down Select Decisions Made Within DOE's Chemical Hydrogen Storage Center of Excellence Materials Down Select Decisions Made Within DOE's Chemical Hydrogen Storage Center...

  3. Boston University's Department of Chemistry Selection of Dissertation Advisory Committee

    E-Print Network [OSTI]

    Boston University's Department of Chemistry Selection of Dissertation Advisory Committee, will select the members of a Dissertation Advisory Committee and submit the list of names to the chair

  4. Selective Response of Mesoporous Silicon to Adsorbants with Nitro...

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

    We demonstrate that the electronic structure of mesoporous silicon is affected by adsorption of nitrobased explosive molecules in a compound-selective manner. This selective...

  5. High-Temperatuer Solar Selective Coating Development for Power...

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

    High-Temperatuer Solar Selective Coating Development for Power Tower Receivers High-Temperatuer Solar Selective Coating Development for Power Tower Receivers This presentation was...

  6. Virginia Tech Selected to Continue Development of Innovative...

    Office of Environmental Management (EM)

    Virginia Tech Selected to Continue Development of Innovative Building Automation System Virginia Tech Selected to Continue Development of Innovative Building Automation System...

  7. Energy Department Selects 11 Tribal Communities to Deploy Energy...

    Energy Savers [EERE]

    Selects 11 Tribal Communities to Deploy Energy Efficiency and Renewable Energy Technologies Energy Department Selects 11 Tribal Communities to Deploy Energy Efficiency and...

  8. Fault Tolerant Evaluation of Continuous Selection Queries over Sensor Data

    E-Print Network [OSTI]

    Lazaridis, Iosif; Han, Qi; Mehrotra, Sharad; Venkatasubramanian, Nalini

    2009-01-01T23:59:59.000Z

    Evaluation of Continuous Selection Queries over Sensor Dataevaluation of continuous selection queries (CSQs) over sensor-sensor suffices and there is no Fault Tolerant Evaluation of

  9. Baer selected to join Washington Academy of Sciences | EMSL

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

    selected to join Washington Academy of Sciences Baer selected to join Washington Academy of Sciences Released: July 21, 2014 He is being honored for outstanding scientific...

  10. Fact #861 February 23, 2015 Idle Fuel Consumption for Selected...

    Energy Savers [EERE]

    1 February 23, 2015 Idle Fuel Consumption for Selected Gasoline and Diesel Vehicles Fact 861 February 23, 2015 Idle Fuel Consumption for Selected Gasoline and Diesel Vehicles...

  11. SciTech Connect: Gametic selection as an evolutionary force:...

    Office of Scientific and Technical Information (OSTI)

    Gametic selection as an evolutionary force: the maintenance of lethal polymorphisms in wild populations of Mus musculus Citation Details In-Document Search Title: Gametic selection...

  12. Recovery Act Selections for Smart Grid Investment Grant Awards...

    Office of Environmental Management (EM)

    Recovery Act Selections for Smart Grid Investment Grant Awards- By Category Updated July 2010 Recovery Act Selections for Smart Grid Investment Grant Awards- By Category Updated...

  13. A Method for Selective Enrichment and Analysis of Nitrotyrosine...

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

    Method for Selective Enrichment and Analysis of Nitrotyrosine-Containing Peptides in Complex Proteome Samples. A Method for Selective Enrichment and Analysis of...

  14. Toxicities of selected substances to freshwater biota

    SciTech Connect (OSTI)

    Hohreiter, D.W.

    1980-05-01T23:59:59.000Z

    The amount of data available concerning the toxicity of various substances to freshwater biota is so large that it is difficult to use in a practical situation, such as environmental impact assessment. In this document, summary tables are presented showing acute and/or chronic toxicity of selected substances for various groups of aquatic biota. Each entry is referenced to its original source so that details concerning experimental conditions may be consulted. In addition, general information concerning factors modifying toxicity, synergisms, evidence of bioaccumulation, and water quality standards and criteria for the selected substances is given. The final table is a general toxicity table designed to provide an easily accessible and general indication of toxicity of selected substances in aquatic systems.

  15. Comparison of a Greedy Selection Operator to Tournament Selection and a Hill Climber

    E-Print Network [OSTI]

    Parker, Gary B.

    genetic algorithm selection operator with very high selection pressure, dubbed the "Jugate Adaptive Method of the search space at large [1-3]. Genetic algorithms (GAs) address the need for exploration through random for exploitation by constantly generating mutants or neighbors of the current candidate solution and adopting

  16. Selecting a New Water Heater You have a lot to consider when selecting a

    E-Print Network [OSTI]

    Selecting a New Water Heater You have a lot to consider when selecting a new water heater for your efficient and save you money. Consider the different types of water heaters available and determine the right size and fuel source for your home. Types of Water Heaters It's a good idea to know the different

  17. Selective sorbents for purification of hydrocarbons

    DOE Patents [OSTI]

    Yang, Ralph T.; Yang, Frances H.; Takahashi, Akira; Hernandez-Maldonado, Arturo J.

    2006-05-30T23:59:59.000Z

    A method for removing thiophene and thiophene compounds from liquid fuel includes contacting the liquid fuel with an adsorbent which preferentially adsorbs the thiophene and thiophene compounds. The adsorption takes place at a selected temperature and pressure, thereby producing a non-adsorbed component and a thiophene/thiophene compound-rich adsorbed component. The adsorbent includes either a metal or a metal cation that is adapted to form .pi.-complexation bonds with the thiophene and/or thiophene compounds, and the preferential adsorption occurs by .pi.-complexation. A further method includes selective removal of aromatic compounds from a mixture of aromatic and aliphatic compounds.

  18. Selective sorbents for purification of hydrocartons

    DOE Patents [OSTI]

    Yang, Ralph T.; Yang, Frances H.; Takahashi, Akira; Hermandez-Maldonado, Arturo J.

    2006-12-12T23:59:59.000Z

    A method for removing thiophene and thiophene compounds from liquid fuel includes contacting the liquid fuel with an adsorbent which preferentially adsorbs the thiophene and thiophene compounds. The adsorption takes place at a selected temperature and pressure, thereby producing a non-adsorbed component and a thiophene/thiophene compound-rich adsorbed component. The adsorbent includes either a metal or a metal ion that is adapted to form .pi.-complexation bonds with the thiophene and/or thiophene compounds, and the preferential adsorption occurs by .pi.-complexation. A further method includes selective removal of aromatic compounds from a mixture of aromatic and aliphatic compounds.

  19. Selective Sorbents For Purification Of Hydrocarbons

    DOE Patents [OSTI]

    Yang, Ralph T. (Ann Arbor, MI); Yang, Frances H. (Ann Arbor, MI); Takahashi, Akira (Yoko-Machi, JP); Hernandez-Maldonado, Arturo J. (Ann Arbor, MI)

    2006-04-18T23:59:59.000Z

    A method for removing thiophene and thiophene compounds from liquid fuel includes contacting the liquid fuel with an adsorbent which preferentially adsorbs the thiophene and thiophene compounds. The adsorption takes place at a selected temperature and pressure, thereby producing a non-adsorbed component and a thiophene/thiophene compound-rich adsorbed component. The adsorbent includes either a metal or a metal ion that is adapted to form p-complexation bonds with the thiophene and/or thiophene compounds, and the preferential adsorption occurs by p-complexation. A further method includes selective removal of aromatic compounds from a mixture of aromatic and aliphatic compounds.

  20. Selective sorbents for purification of hydrocarbons

    DOE Patents [OSTI]

    Yang, Ralph T.; Hernandez-Maldonado, Arturo J.; Yang, Frances H.; Takahashi, Akira

    2006-08-22T23:59:59.000Z

    A method for removing thiophene and thiophene compounds from liquid fuel includes contacting the liquid fuel with an adsorbent which preferentially adsorbs the thiophene and thiophene compounds. The adsorption takes place at a selected temperature and pressure, thereby producing a non-adsorbed component and a thiophene/thiophene compound-rich adsorbed component. The adsorbent includes either a metal or a metal cation that is adapted to form .pi.-complexation bonds with the thiophene and/or thiophene compounds, and the preferential adsorption occurs by .pi.-complexation. A further method includes selective removal of aromatic compounds from a mixture of aromatic and aliphatic compounds.

  1. Beam geometry selection using sequential beam addition

    SciTech Connect (OSTI)

    Popple, Richard A., E-mail: rpopple@uabmc.edu; Brezovich, Ivan A.; Fiveash, John B. [Department of Radiation Oncology, The University of Alabama at Birmingham, 1720 2nd Avenue South, Birmingham, Alabama 35294 (United States)] [Department of Radiation Oncology, The University of Alabama at Birmingham, 1720 2nd Avenue South, Birmingham, Alabama 35294 (United States)

    2014-05-15T23:59:59.000Z

    Purpose: The selection of optimal beam geometry has been of interest since the inception of conformal radiotherapy. The authors report on sequential beam addition, a simple beam geometry selection method, for intensity modulated radiation therapy. Methods: The sequential beam addition algorithm (SBA) requires definition of an objective function (score) and a set of candidate beam geometries (pool). In the first iteration, the optimal score is determined for each beam in the pool and the beam with the best score selected. In the next iteration, the optimal score is calculated for each beam remaining in the pool combined with the beam selected in the first iteration, and the best scoring beam is selected. The process is repeated until the desired number of beams is reached. The authors selected three treatment sites, breast, lung, and brain, and determined beam arrangements for up to 11 beams from a pool comprised of 25 equiangular transverse beams. For the brain, arrangements were additionally selected from a pool of 22 noncoplanar beams. Scores were determined for geometries comprised equiangular transverse beams (EQA), as well as two tangential beams for the breast case. Results: In all cases, SBA resulted in scores superior to EQA. The breast case had the strongest dependence on beam geometry, for which only the 7-beam EQA geometry had a score better than the two tangential beams, whereas all SBA geometries with more than two beams were superior. In the lung case, EQA and SBA scores monotonically improved with increasing number of beams; however, SBA required fewer beams to achieve scores equivalent to EQA. For the brain case, SBA with a coplanar pool was equivalent to EQA, while the noncoplanar pool resulted in slightly better scores; however, the dose-volume histograms demonstrated that the differences were not clinically significant. Conclusions: For situations in which beam geometry has a significant effect on the objective function, SBA can identify arrangements equivalent to equiangular geometries but using fewer beams. Furthermore, SBA provides the value of the objective function as the number of beams is increased, allowing the planner to select the minimal beam number that achieves the clinical goals. The method is simple to implement and could readily be incorporated into an existing optimization system.

  2. The choice: evaluating and selecting scientific proposals

    E-Print Network [OSTI]

    Navarra, Antonio

    2015-01-01T23:59:59.000Z

    The selection process of proposals is a crucial component of scientific progress and innovations. Limited resources must be allocated in the most effective way to maximise advancements and the production of new knowledge, especially as it is becoming increasingly clear that technological and scientific innovation and creativity is an instrument of economic policy and social development. The traditional approach based on merit evaluation by experts has been the preferred method, but there is an issue regarding to what extent such a method can also be an instrument of effective policy. This paper discuss some of the basic processes involved in the evaluation and selection of proposals, indicating some criterion for an optimal solution.

  3. On spatial mutation-selection models

    SciTech Connect (OSTI)

    Kondratiev, Yuri, E-mail: kondrat@math.uni-bielefeld.de [Fakultt fr Mathematik, Universitt Bielefeld, Postfach 100131, 33501 Bielefeld (Germany)] [Fakultt fr Mathematik, Universitt Bielefeld, Postfach 100131, 33501 Bielefeld (Germany); Kutoviy, Oleksandr, E-mail: kutoviy@math.uni-bielefeld.de, E-mail: kutovyi@mit.edu [Fakultt fr Mathematik, Universitt Bielefeld, Postfach 100131, 33501 Bielefeld (Germany) [Fakultt fr Mathematik, Universitt Bielefeld, Postfach 100131, 33501 Bielefeld (Germany); Department of Mathematics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139 (United States); Minlos, Robert, E-mail: minl@iitp.ru; Pirogov, Sergey, E-mail: pirogov@proc.ru [IITP, RAS, Bolshoi Karetnyi 19, Moscow (Russian Federation)] [IITP, RAS, Bolshoi Karetnyi 19, Moscow (Russian Federation)

    2013-11-15T23:59:59.000Z

    We discuss the selection procedure in the framework of mutation models. We study the regulation for stochastically developing systems based on a transformation of the initial Markov process which includes a cost functional. The transformation of initial Markov process by cost functional has an analytic realization in terms of a Kimura-Maruyama type equation for the time evolution of states or in terms of the corresponding Feynman-Kac formula on the path space. The state evolution of the system including the limiting behavior is studied for two types of mutation-selection models.

  4. clock period selection method slack minimization criteria

    E-Print Network [OSTI]

    California at Irvine, University of

    An optimal clock period selection method based on slack minimization criteria EnShou Chang Daniel the effect of clock slack on the performance of designs and present an algorithm to find a slack]: allocation, scheduling and binding. The purpose of alloca tion is to determine the number of resources

  5. Selection to the Kansas Supreme Court

    E-Print Network [OSTI]

    Ware, Stephen J.

    2008-01-01T23:59:59.000Z

    . This process for selecting justices to the Kansas Supreme Court is described by the organized bar as a "merit," rather than political, process. Other observers, however, emphasize that the process has a political side as well. This paper surveys debate about...

  6. Glucose sensing molecules having selected fluorescent properties

    DOE Patents [OSTI]

    Satcher, Jr., Joe H.; Lane, Stephen M.; Darrow, Christopher B.; Cary, Douglas R.; Tran, Joe Anh

    2004-01-27T23:59:59.000Z

    An analyte sensing fluorescent molecule that employs intramolecular electron transfer is designed to exhibit selected fluorescent properties in the presence of analytes such as saccharides. The selected fluorescent properties include excitation wavelength, emission wavelength, fluorescence lifetime, quantum yield, photostability, solubility, and temperature or pH sensitivity. The compound comprises an aryl or a substituted phenyl boronic acid that acts as a substrate recognition component, a fluorescence switch component, and a fluorophore. The fluorophore and switch component are selected such that the value of the free energy for electron transfer is less than about 3.0 kcal mol.sup.-1. Fluorescent compounds are described that are excited at wavelengths greater than 400 nm and emit at wavelengths greater than 450 nm, which is advantageous for optical transmission through skin. The fluorophore is typically selected from transition metal-ligand complexes and thiazine, oxazine, oxazone, or oxazine-one as well as anthracene compounds. The fluorescent compound can be immobilized in a glucose permeable biocompatible polymer matrix that is implantable below the skin.

  7. Selection of Processes for Welding Steel Rails

    E-Print Network [OSTI]

    Eagar, Thomas W.

    ...._ _) Selection of Processes for Welding Steel Rails by N.S. Tsai* and T.W. Eagar* ABSTRACT 421 The advantages and limitations ofseveral conventional and prospective rail welding processes are reviewed with emphasis on the heat input rate, on joint preparation, on post weld grinding and on resultant metallurgical

  8. SELECTED BIBLIOGRAPHY ON APPLICATIONS OF ELECTRICTY

    E-Print Network [OSTI]

    for administrative or legislative action. It is issued in limited quantities for the official use of Federal, State or cooperating Agencies and in processed form for economy and to avoid delay in publication. S7801 #12;United, Director SELECTED BIBLIOGRAPHY ON THE APPLICATIONS OF ELECTRICITY IN FISHERY SCIENCE by Vernon C. Applegate

  9. Robust Critical Node Selection by Benders Decomposition

    E-Print Network [OSTI]

    2014-01-28T23:59:59.000Z

    critical node selection problem, we define the following decision variables ..... method to generate Pareto-optimal cuts thus achieving very good speed-ups compared to ... Barabsi-Albert graphs generated using the Barabsi graph generator (Dreier, 2006). ...... Computers & Operations Research, 38(12):1766 1774, 2011.

  10. Convex Principal Feature Selection Mahdokht Masaeli1

    E-Print Network [OSTI]

    Dy, Jennifer G.

    Advertising Sciences, Yahoo! Labs, Silicon Valley, CA, USA 3 Computer Aided Diagnosis and Therapy, Siemens Medical Solutions, USA {masaeli.m, yan.y, cui.yi}@neu.edu, glenn.fung@siemens.com, jdy transformation is achieved. However, true feature selection may not be achieved as non-sparse coefficients may

  11. Color selective photodetector and methods of making

    DOE Patents [OSTI]

    Walker, Brian J.; Dorn, August; Bulovic, Vladimir; Bawendi, Moungi G.

    2013-03-19T23:59:59.000Z

    A photoelectric device, such as a photodetector, can include a semiconductor nanowire electrostatically associated with a J-aggregate. The J-aggregate can facilitate absorption of a desired wavelength of light, and the semiconductor nanowire can facilitate charge transport. The color of light detected by the device can be chosen by selecting a J-aggregate with a corresponding peak absorption wavelength.

  12. The Variable Selection Problem Edward I. George

    E-Print Network [OSTI]

    George, Edward I.

    The Variable Selection Problem Edward I. George Journal of the American Statistical Association-1459%28200012%2995%3A452%3C1304%3ATVSP%3E2.0.CO%3B2-1 Journal of the American Statistical Association is currently published by American Statistical Association. Your use of the JSTOR archive indicates your acceptance

  13. Selecting Sheep for Wool and Mutton Production.

    E-Print Network [OSTI]

    Groff, Jack L.; Gray, James A.

    1971-01-01T23:59:59.000Z

    "r:~+V Tli~re are several ways to measure density J-,I~P:PIU hut they are too technical and slow for a , ?lnlr' ~illnction method. Thp following conditions may cause misjudgement ~"Ipnsiq~ wh~n one of the rapid selection methods is I '>'j 1 Differences...

  14. Selective flotation of inorganic sulfides from coal

    DOE Patents [OSTI]

    Miller, Kenneth J. (Floreffe, PA); Wen, Wu-Wey (Murrysville, PA)

    1989-01-01T23:59:59.000Z

    Pyritic sulfur is removed from coal or other carbonaceous material through the use of humic acid as a coal flotation depressant. Following the removal of coarse pyrite, the carbonaceous material is blended with humic acid, a pyrite flotation collector and a frothing agent within a flotation cell to selectively float pyritic sulfur leaving clean coal as an underflow.

  15. Selective flotation of inorganic sulfides from coal

    DOE Patents [OSTI]

    Miller, K.J.; Wen, Wu-Wey

    1988-05-31T23:59:59.000Z

    Pyritic sulfur is removed from coal or other carbonaceous material through the use of humic acid as a coal flotation depressant. Following the removal of coarse pyrite, the carbonaceous material is blended with humic acid, a pyrite flotation collector and a frothing agent within a flotation cell to selectively float pyritic sulfur leaving clean coal as an underflow. 1 fig., 2 tabs.

  16. ISP: Learning Inferential Selectional Preferences Patrick Pantel

    E-Print Network [OSTI]

    Hovy, Eduard

    California Marina del Rey, CA {pantel,rahul,timc,hovy}@isi.edu ITC-Irst and University of Trento Via Sommarive, 18 Povo 38050 Trento, Italy coppolab@itc.it Abstract Semantic inference is a key component holds, which we call Inferential Selectional Preferences. For example, inference rule (1) should only

  17. Isotope separation by selective photodissociation of glyoxal

    DOE Patents [OSTI]

    Marling, John B. (Pleasanton, CA)

    1976-01-01T23:59:59.000Z

    Dissociation products, mainly formaldehyde and carbon monoxide, enriched in a desired isotope of carbon, oxygen, or hydrogen are obtained by the selective photodissociation of glyoxal wherein glyoxal is subjected to electromagnetic radiation of a predetermined wavelength such that photon absorption excites and induces dissociation of only those molecules of glyoxal containing the desired isotope.

  18. ONLINE OPTIMIZATION AND SELECTION OF MEASUREMENTS

    E-Print Network [OSTI]

    Skogestad, Sigurd

    117 Chapter 7 ON­LINE OPTIMIZATION AND SELECTION OF MEASUREMENTS This is the last of three chapters that discuss optimal operation of a general heat exchanger network. A method that combines the use of steady state optimization and decentralized feedback control is proposed. A general steady state model

  19. Acridine-intercalator based hypoxia selective cytotoxins

    DOE Patents [OSTI]

    Papadopoulou-Rosenzweig, M.; Bloomer, W.D.

    1994-03-15T23:59:59.000Z

    Hypoxia selective cytotoxins of the general formula STR1 wherein n is from 1 to 5, and NO[sub 2] is in at least one of the 2, 4 or 5-positions of the imidazole are developed. Such compounds have utility as radiosensitizers and chemosensitizers. 9 figs.

  20. Device Selection by a Personal Proxy Agent

    E-Print Network [OSTI]

    von Bochmann, Gregor

    Device Selection by a Personal Proxy Agent N. Hadibi, K. El-khatib, Eric Z. Zhang, Ken Chan, G. v user to access communication devices currently present in his Personal Area Network (PAN) Performs PreferencesDevice Capability An example Scenario: Connecting Alice and Bob w/o a Personal Proxy Internet Home

  1. Characterization of Commercial Sites Selected for

    E-Print Network [OSTI]

    Energy Institute School of Ocean and Earth Science and Technology University of Hawai`i January 2014 #12Characterization of Commercial Sites Selected for Energy Efficiency Monitoring Prepared for the U.S. Department of Energy Office of Electricity Delivery and Energy Reliability Under Cooperative Agreement No. DE

  2. Original article Parallel selection of ethanol

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Original article Parallel selection of ethanol and acetic-acid tolerance in Drosophila melanogaster significantly with latitude (0.036 ! 0.004 for 1° latitude; genetic divergence FST = 0.25). Patterns of ethanol of latitudinal ethanol tolerance (10 to 15%) and acetic-acid tolerance (3.7 to 13.2%) were observed in adult

  3. Engineering development of selective agglomeration. Final report

    SciTech Connect (OSTI)

    Not Available

    1993-04-01T23:59:59.000Z

    This report presents the findings of the project entitled ``Engineering Development of Selective Agglomeration.`` The purpose is to develop selective agglomeration technology to a commercially acceptable level by 1993. Engineering development included bench-scale process development, component development adaptation or modification of existing unit operations, proof-of-concept (POC) module design, fabrication, testing, data evaluation, and conceptual design of a commercial facility. The information obtained during POC operation resulted in a technical and economic design base sufficient to support construction and operation of a commercial plant. Throughout this project performance targets for the engineering development of selective agglomeration process were to achieve 85% or greater Btu recovery at 85% or greater pyritic sulfur rejection (PSR). Additional objectives included producing a final clean-coal product with an ash content of 6% or less which is suitable for conventional coal handling systems. The selective agglomeration process, as applied to coal cleaning, is based on differences in the surface chemistry of coal and its associated impurities. Coal particles are hydrophobic (i.e., repel water) while the majority of its impurities are hydrophilic (i.e., stabilized in water). During selective agglomeration, a liquid (the agglomerant) that is immiscible with water is introduced into a coal-water slurry and agitated to disperse it in the slurry, thereby allowing it to come into contact with all particles in the slurry. The coal particles, due to their hydrophobic nature, are attracted to the agglomerant phase. The hydrophilic mineral impurities remain in the water phase. Continued agitation of the agglomerant-coated coal particles causes them to coalesce to form agglomerates. Once the agglomerates are formed, they are separated from the mineral matter-bearing aqueous phase by subsequent processing steps.

  4. Random selection as a confidence building tool

    SciTech Connect (OSTI)

    Macarthur, Duncan W [Los Alamos National Laboratory; Hauck, Danielle [Los Alamos National Laboratory; Langner, Diana [Los Alamos National Laboratory; Thron, Jonathan [Los Alamos National Laboratory; Smith, Morag [Los Alamos National Laboratory; Williams, Richard [Los Alamos National Laboratory

    2010-01-01T23:59:59.000Z

    Any verification measurement performed on potentially classified nuclear material must satisfy two seemingly contradictory constraints. First and foremost, no classified information can be released. At the same time, the monitoring party must have confidence in the veracity of the measurement. The first concern can be addressed by performing the measurements within the host facility using instruments under the host's control. Because the data output in this measurement scenario is also under host control, it is difficult for the monitoring party to have confidence in that data. One technique for addressing this difficulty is random selection. The concept of random selection can be thought of as four steps: (1) The host presents several 'identical' copies of a component or system to the monitor. (2) One (or more) of these copies is randomly chosen by the monitors for use in the measurement system. (3) Similarly, one or more is randomly chosen to be validated further at a later date in a monitor-controlled facility. (4) Because the two components or systems are identical, validation of the 'validation copy' is equivalent to validation of the measurement system. This procedure sounds straightforward, but effective application may be quite difficult. Although random selection is often viewed as a panacea for confidence building, the amount of confidence generated depends on the monitor's continuity of knowledge for both validation and measurement systems. In this presentation, we will discuss the random selection technique, as well as where and how this technique might be applied to generate maximum confidence. In addition, we will discuss the role of modular measurement-system design in facilitating random selection and describe a simple modular measurement system incorporating six small {sup 3}He neutron detectors and a single high-purity germanium gamma detector.

  5. Hybridization and Selective Release of DNA Microarrays

    SciTech Connect (OSTI)

    Beer, N R; Baker, B; Piggott, T; Maberry, S; Hara, C M; DeOtte, J; Benett, W; Mukerjee, E; Dzenitis, J; Wheeler, E K

    2011-11-29T23:59:59.000Z

    DNA microarrays contain sequence specific probes arrayed in distinct spots numbering from 10,000 to over 1,000,000, depending on the platform. This tremendous degree of multiplexing gives microarrays great potential for environmental background sampling, broad-spectrum clinical monitoring, and continuous biological threat detection. In practice, their use in these applications is not common due to limited information content, long processing times, and high cost. The work focused on characterizing the phenomena of microarray hybridization and selective release that will allow these limitations to be addressed. This will revolutionize the ways that microarrays can be used for LLNL's Global Security missions. The goals of this project were two-fold: automated faster hybridizations and selective release of hybridized features. The first study area involves hybridization kinetics and mass-transfer effects. the standard hybridization protocol uses an overnight incubation to achieve the best possible signal for any sample type, as well as for convenience in manual processing. There is potential to significantly shorten this time based on better understanding and control of the rate-limiting processes and knowledge of the progress of the hybridization. In the hybridization work, a custom microarray flow cell was used to manipulate the chemical and thermal environment of the array and autonomously image the changes over time during hybridization. The second study area is selective release. Microarrays easily generate hybridization patterns and signatures, but there is still an unmet need for methodologies enabling rapid and selective analysis of these patterns and signatures. Detailed analysis of individual spots by subsequent sequencing could potentially yield significant information for rapidly mutating and emerging (or deliberately engineered) pathogens. In the selective release work, optical energy deposition with coherent light quickly provides the thermal energy to single spots to release hybridized DNA. This work leverages LLNL expertise in optics, microfluids, and bioinformatics.

  6. Review and selection of unsaturated flow models

    SciTech Connect (OSTI)

    Reeves, M.; Baker, N.A.; Duguid, J.O. [INTERA, Inc., Las Vegas, NV (United States)

    1994-04-04T23:59:59.000Z

    Since the 1960`s, ground-water flow models have been used for analysis of water resources problems. In the 1970`s, emphasis began to shift to analysis of waste management problems. This shift in emphasis was largely brought about by site selection activities for geologic repositories for disposal of high-level radioactive wastes. Model development during the 1970`s and well into the 1980`s focused primarily on saturated ground-water flow because geologic repositories in salt, basalt, granite, shale, and tuff were envisioned to be below the water table. Selection of the unsaturated zone at Yucca Mountain, Nevada, for potential disposal of waste began to shift model development toward unsaturated flow models. Under the US Department of Energy (DOE), the Civilian Radioactive Waste Management System Management and Operating Contractor (CRWMS M&O) has the responsibility to review, evaluate, and document existing computer models; to conduct performance assessments; and to develop performance assessment models, where necessary. This document describes the CRWMS M&O approach to model review and evaluation (Chapter 2), and the requirements for unsaturated flow models which are the bases for selection from among the current models (Chapter 3). Chapter 4 identifies existing models, and their characteristics. Through a detailed examination of characteristics, Chapter 5 presents the selection of models for testing. Chapter 6 discusses the testing and verification of selected models. Chapters 7 and 8 give conclusions and make recommendations, respectively. Chapter 9 records the major references for each of the models reviewed. Appendix A, a collection of technical reviews for each model, contains a more complete list of references. Finally, Appendix B characterizes the problems used for model testing.

  7. ORIGINAL PAPER Rapid Selection Response for Contextual Fear Conditioning

    E-Print Network [OSTI]

    Gilad, Yoav

    conditioning. Keywords Fear conditioning Á Albino Á Tyrosinase (tyr) Á Selection Á QTL Á Gene expression

  8. Selection of 3013 Containers for Field Surveillance

    SciTech Connect (OSTI)

    Larry Peppers, Elizabeth Kelly, James McClard, Gary Friday, Theodore Venetz, and Jerry Stakebade

    2007-01-01T23:59:59.000Z

    This report revises and combines three earlier reports dealing with the binning, statistical sampling, and sample selection of 3013 containers for field surveillance. It includes changes to the binning specification resulting from completion of the Savannah River Site packaging campaign and new information from the shelf-life program and field surveillance activities. The revised bin assignments result in changes to the random sample specification. These changes are necessary to meet the statistical requirements of the surveillance program. This report will be reviewed regularly and revised as needed. Section 1 of this report summarizes the results of an extensive effort to assign all of the current and projected 3013 containers in the Department of Energy (DOE) inventory to one of three bins (Innocuous, Pressure and Corrosion, or Pressure) based on potential failure mechanisms. Grouping containers into bins provides a framework to make a statistical selection of individual containers from the entire population for destructive and nondestructive field surveillance. The binning process consisted of three main steps. First, the packaged containers were binned using information in the Integrated Surveillance Program database and a decision tree. The second task was to assign those containers that could not be binned using the decision tree to a specific bin using container-by-container engineering review. The final task was to evaluate containers not yet packaged and assign them to bins using process knowledge. The technical basis for the decisions made during the binning process is included in Section 1. A composite decision tree and a summary table show all of the containers projected to be in the DOE inventory at the conclusion of packaging at all sites. Decision trees that provide an overview of the binning process and logic are included for each site. Section 2 of this report describes the approach to the statistical selection of containers for surveillance and consists of a revision of the earlier statistical sampling report. The requirement of 99.9% probability of observing at least one of the worst 5% (99.9/5%) of the containers with a potential for degradation is used to determine the number of containers in the random sample for the Pressure and Corrosion and the Pressure bins. Sampling requirements for the Innocuous bin are not based on the 99.9/5% requirement; rather, they are based on evaluating the assumption of no significant degradation of, or variability between, containers relative to corrosion or pressure generation within the Innocuous bin population as valid. Section 3 of this report focuses on the actual selection of 3013 containers for surveillance. Surveillance containers are identified by the year that the surveillance should be performed. In addition to the randomly selected containers, containers were selected from the entire population, based on engineering judgment for each of these years. The judgmental sampling targets containers with the greatest potential for gas generation and/or corrosion. The factors used for judgmental sample selection are documented in this section. A more detailed discussion of the FY 2005 sample selection process is contained in the previous FY 2005 sample selection report.

  9. R163B -Eye movements and time-based selection Running head: EYE MOVEMENTS AND TIME-BASED SELECTION

    E-Print Network [OSTI]

    Inglis, Matthew

    R163B - Eye movements and time-based selection Running head: EYE MOVEMENTS AND TIME-BASED SELECTION Eye movements and time-based selection: Where do the eyes go in preview search? Derrick G. Watson.g.watson@warwick.ac.uk 1 #12;R163B - Eye movements and time-based selection Abstract In visual search tasks, presenting one

  10. Selective spectroscopic methods for water analysis

    SciTech Connect (OSTI)

    Vaidya, B.

    1997-06-24T23:59:59.000Z

    This dissertation explores in large part the development of a few types of spectroscopic methods in the analysis of water. Methods for the determination of some of the most important properties of water like pH, metal ion content, and chemical oxygen demand are investigated in detail. This report contains a general introduction to the subject and the conclusions. Four chapters and an appendix have been processed separately. They are: chromogenic and fluorogenic crown ether compounds for the selective extraction and determination of Hg(II); selective determination of cadmium in water using a chromogenic crown ether in a mixed micellar solution; reduction of chloride interference in chemical oxygen demand determination without using mercury salts; structural orientation patterns for a series of anthraquinone sulfonates adsorbed at an aminophenol thiolate monolayer chemisorbed at gold; and the role of chemically modified surfaces in the construction of miniaturized analytical instrumentation.

  11. Fluidized bed selective pyrolysis of coal

    DOE Patents [OSTI]

    Shang, Jer Y. (McLean, VA); Cha, Chang Y. (Golden, CO); Merriam, Norman W. (Laramie, WY)

    1992-01-01T23:59:59.000Z

    The present invention discloses a process for the pyrolysis of coal which comprises the effective utilization of two zonal inclined fluidized beds, where said zones can be selectively controlled as to temperature and heating rate. The first zonal inclined fluidized bed serves as a dryer for crushed coal and additionally is controlled to selectively pyrolyze said coal producing substantially carbon dioxide for recycle use. The second zonal inclined fluidized bed further pyrolyzes the coal to gaseous, liquid and char products under controlled temperature and heating rate zones designed to economically integrate the product mix. The gas and liquid products are recovered from the gaseous effluent stream while the char which remains can be further treated or utilized in a subsequent process step.

  12. Wavevector Selective Metasurfaces and Tunnel Vision Filters

    E-Print Network [OSTI]

    Fedotov, Vassili A; Walther, Markus; Perino, Mauro; Papasimakis, Nikitas; Zheludev, Nikolay I

    2015-01-01T23:59:59.000Z

    Metasurfaces offer unprecedented flexibility in the design and control of light propagation, replacing bulk optical components and exhibiting exotic optical effects. One of the basic properties of the metasurfaces, which renders them as frequency selective surfaces, is the ability to transmit or reflect radiation within a narrow spectral band that can be engineered on demand. Here we introduce and demonstrate experimentally in the THz domain the concept of wavevector selective surfaces -- metasurfaces transparent only within a narrow range of light propagation directions operating effectively as tunnel vision filters. Practical implementations of the new concept include applications in wavefront manipulation, observational instruments, vision and free-space communication in light-scattering environments, as well as passive camouflage.

  13. Fluidized bed selective pyrolysis of coal

    DOE Patents [OSTI]

    Shang, J.Y.; Cha, C.Y.; Merriam, N.W.

    1992-12-15T23:59:59.000Z

    The present invention discloses a process for the pyrolysis of coal which comprises the effective utilization of two zonal inclined fluidized beds, where said zones can be selectively controlled as to temperature and heating rate. The first zonal inclined fluidized bed serves as a dryer for crushed coal and additionally is controlled to selectively pyrolyze said coal producing substantially carbon dioxide for recycle use. The second zonal inclined fluidized bed further pyrolyses the coal to gaseous, liquid and char products under controlled temperature and heating rate zones designed to economically integrate the product mix. The gas and liquid products are recovered from the gaseous effluent stream while the char which remains can be further treated or utilized in a subsequent process step. 9 figs.

  14. Selected papers for global `95 concerning plutonium

    SciTech Connect (OSTI)

    Sutcliffe, W.G. [ed.

    1996-06-14T23:59:59.000Z

    This report contains selected papers from the Global `95 Conference ``Evaluation of Emerging Nuclear Fuel Cycle Systems,`` held in Versailles, Sept. 11-14, 1995. The 11 papers in Part I are from ``Benefits and Risks of Reprocessing`` sessions. The 7 papers in Part II are some of the more interesting poster papers that relate to the use of Pu for power generation. Finally, the 3 papers are on the topic of management and disposition of Pu from retired nuclear weapons.

  15. Material and processes selection in conceptual design

    E-Print Network [OSTI]

    Krishnakumar, Karthikeyan

    2005-02-17T23:59:59.000Z

    ..................................................................................................................112 ix LIST OF FIGURES Page Fig. 1. Overview of the IIDE Design Process [1]???????????????.. 7 Fig. 2. Abstraction of the Need Statement for the Design of the Brakes for a Car [1]?.11 Fig. 3. Example of a Function Structure... to Satisfy the Requirements of the Design???????????60 Fig. 11.Flowchart Shows the Two Stages in Candidate Material Selection as per M.F. Ashby [3]???????????????????..????????.64 Fig. 12. Logic Path for Separation of Material Properties Into Surface...

  16. Interfacial phenomena on selected cathode materials

    SciTech Connect (OSTI)

    Kostecki, Robert; Matsuo, Yoshiaki; McLarnon, Frank

    2001-06-22T23:59:59.000Z

    We have carried out a series of surface studies of selected cathode materials. Instrumental techniques such as Raman microscopy, surface enhanced Raman spectroscopy (SERS), and atomic force microscopy were used to investigate the cathode surfaces. The goal of this study was to identify detrimental processes which occur at the electrode/electrolyte interface and can lead to electrode degradation and failure during cycling and/or storage at elevated temperatures.

  17. Selecting Sheep for Wool and Mutton Production.

    E-Print Network [OSTI]

    Gray, James A.; Groff, Jack L.

    1971-01-01T23:59:59.000Z

    @c!!~ciio~ W~S increas~d wit'i no ?c'c!itiorlal ooer~tina exrsisp. 'l7~ t~t?l nurnc3er - r0r1 Ollor *+Q 42-v~ar r)erj&. ~YP'&& Breeding ewes being selected on the basis of character. . 3 istics such as conformation, size and wool-produc~nn I ability...

  18. Selected applications of microwave radiometric techniques

    E-Print Network [OSTI]

    Jean, Buford Randall

    1971-01-01T23:59:59.000Z

    detection capability is more promising. Airborne microwave radiometer measurements were made over selected flight lines near Weslaco, Texas to deter- mine the capability of a microwave radiometer system to monitor soil moisture content. An extensive... was supported by National Aeronautics and Space Administration Grant NsG 239-62. The cooperation of the NASA Goddard Space Flight Center and Dr. Thomas Schmugge in conducting the airborne microwave radiometer mission is gratefully acknowledged. Dr. Craig L...

  19. Microalgal Culture Management and Strain Selection Workshop

    Broader source: Energy.gov [DOE]

    ATP3 (Algae Testbed Public-Private Partnership) will be hosting the Microalgal Culture Management and Strain Selection Workshop August 2428, 2015, at The University of Texas at Austin. Topics will include isolating and identifying microalgae, handling and managing microalgal cultures, screening for desirable characteristics, genetically improving strains, and analyzing lipids and higher-value products. Workshop modules will include hands-on bioprospecting, performing sample measurements, monitoring cultures for contaminants, and analyzing algal biomass composition.

  20. Route selection issues for NWPA shipments

    SciTech Connect (OSTI)

    Hill, C.V. [Science Applications International Corp., Oak Ridge, TN (United States); Harrison, I.G. [Oak Ridge National Lab., TN (United States)

    1993-06-01T23:59:59.000Z

    Questions surrounding the designation of routes for the movement of spent nuclear fuel (SNF) and high-level radioactive waste (HLW) by the Office of Civilian Radioactive Waste Management (OCRWM) have broad implications. Federal regulations prescribe rules to be applied in the selection of highway routes. In most cases, these rules will lead to a clear selection of one route between an origin and destination point. However, in other cases, strict application of the regulations does not result in a clear choice of a preferred route. The regulations also provide discretion to State governments and carriers to select alternative routes to enhance the safety of the shipment. Railroad shipments of radioactive materials are not subject to Federal routing regulations. Since the railroads operate on private property, it has been assumed that they know the best way to move freight on their system. This discretion, while desirable for addressing unique local safety concerns or for responding to temporary safety concerns such as road problems, weather conditions, or construction areas, leads to significant opportunity for misunderstandings and uneasiness on the part of local residents.

  1. The response of selected diverse sorghums to latitudinal environment variations in Texas

    E-Print Network [OSTI]

    Mena, Hector Armando

    1976-01-01T23:59:59.000Z

    , and distance between rows during the growing season at six locations in Texas, 1975. 18 4, Mean solar radiation during stages of growth of grain sorghum at six locations in Texas, 1950-1972. . . . . . . . . . . 21 5. Variations of daylength at different... locations in Texas throughout growing season. 21 6. Average temperatures (maximum, minimum, mean and x ? 60) during stages of growth of grain sorghum at six locations in Texas, 1975. 23 7. Mean and coefficient of variation of yield and plant...

  2. Bond selective chemistry beyond the adiabatic approximation

    SciTech Connect (OSTI)

    Butler, L.J. [Univ. of Chicago, IL (United States)

    1993-12-01T23:59:59.000Z

    One of the most important challenges in chemistry is to develop predictive ability for the branching between energetically allowed chemical reaction pathways. Such predictive capability, coupled with a fundamental understanding of the important molecular interactions, is essential to the development and utilization of new fuels and the design of efficient combustion processes. Existing transition state and exact quantum theories successfully predict the branching between available product channels for systems in which each reaction coordinate can be adequately described by different paths along a single adiabatic potential energy surface. In particular, unimolecular dissociation following thermal, infrared multiphoton, or overtone excitation in the ground state yields a branching between energetically allowed product channels which can be successfully predicted by the application of statistical theories, i.e. the weakest bond breaks. (The predictions are particularly good for competing reactions in which when there is no saddle point along the reaction coordinates, as in simple bond fission reactions.) The predicted lack of bond selectivity results from the assumption of rapid internal vibrational energy redistribution and the implicit use of a single adiabatic Born-Oppenheimer potential energy surface for the reaction. However, the adiabatic approximation is not valid for the reaction of a wide variety of energetic materials and organic fuels; coupling between the electronic states of the reacting species play a a key role in determining the selectivity of the chemical reactions induced. The work described below investigated the central role played by coupling between electronic states in polyatomic molecules in determining the selective branching between energetically allowed fragmentation pathways in two key systems.

  3. Risk assessment of selected commercial firewall software

    E-Print Network [OSTI]

    Cropper, Charles Austin

    2000-01-01T23:59:59.000Z

    OF SCIENCE Approved as to sty e and ontent by: Udo . Pooch (Chair of Committee) Jyh-Cham S, Liu Michael T. Longnecker (Member) Wei Zhao (Head of Department) August 2000 Major Subject: Computer Science ABSTRACT Risk Assessment of Selected... begins on a 32 bit boundary. The padding is composed of zeros. D~ata ' bi: Th p yi M fa TCPp kt, i. . th d t gme t. 2. 1. 1. 6. 2 TCP Connection Establishment Procedure TCP Connection Establishment Procedure (Three-Way Handshake) 1. The server must...

  4. Comparison of Selected Multifrequency Eddy Current Systems

    SciTech Connect (OSTI)

    Sikora, R.; Chady, T.; Baniukiewicz, P. [Department of Electrical Engineering, Szczecin University of Technology, al. Piastow 17, 70-310 Szczecin (Poland)

    2007-03-21T23:59:59.000Z

    In this paper, authors take into consideration two different implementations of the multifrequency EC method. In the first implementation, the excitation coils are powered by a programmable generator with a signal consisting selected sinusoidal components. An output signal from detection coils is analyzed using Fourier transform in order to obtain amplitudes of all the components. In the second method, the sensor is excited by sinusoidal signal with modulated frequency. For both implementations, the authors analyze various measurement conditions and compare the results obtained for Incone1600 plate.

  5. Corrosion reference for geothermal downhole materials selection

    SciTech Connect (OSTI)

    Ellis, P.F. II, Smith, C.C.; Keeney, R.C.; Kirk, D.K.; Conover, M.F.

    1983-03-01T23:59:59.000Z

    Geothermal downhole conditions that may affect the performance and reliability of selected materials and components used in the drilling, completion, logging, and production of geothermal wells are reviewed. The results of specific research and development efforts aimed at improvement of materials and components for downhole contact with the hostile physicochemical conditions of the geothermal reservoir are discussed. Materials and components covered are tubular goods, stainless steels and non-ferrous metals for high-temperature downhole service, cements for high-temperature geothermal wells, high-temperature elastomers, drilling and completion tools, logging tools, and downhole pumps. (MHR)

  6. Economics of selected WECS dispersed applications

    SciTech Connect (OSTI)

    Krawiec, S.

    1980-02-01T23:59:59.000Z

    An economic analysis for distributed Wind Energy Conversion Systems (WECS) was conducted for the Department of Energy (DOE) as part of the Solar Commercial Readiness Assessment task at the Solar Energy Research Institute (SERI). The major objective of the study is to analyze: the cost of electricity generated by selected wind energy systems in residential and agricultural applications; the breakeven cost of wind systems able to compete economically with conventional power sources in dispersed applications; and the impact of major economic factors on the cost performance index.

  7. Project specific selection of decommissioning techniques

    SciTech Connect (OSTI)

    Christ, B.G.; Wehner, E.L. [NUKEM GmbH, Alzenau (Germany). Nuclear Technology Div.

    1993-12-31T23:59:59.000Z

    Three decommissioning projects with quite different contamination characteristics were terminated with the requested result of freely released rooms for dismantled buildings under supervision of the responsible authorities. The examples show that control areas with different kinds of contamination and different equipment can be decommissioned with reasonable effort. The specific selection of decontamination methods and measurement techniques optimizes the performance of the project and lowers the amount of primary and secondary active waste. The careful planning of radiation protection measures ensures the safe work within the foreseen time schedule.

  8. Chavez selected for Caltech Distinguished Alumni Award

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisiting the TWPSuccessAlamosCharacterization of Selective BindingD.Charting theChavez

  9. Selected Past Financial Awards | 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 onYouTube YouTube Note: Since the.pdfBreakingMay 2015ParentsMiddle|Security Enforcement Documentsis NotSelectFinancial

  10. Pump Selection Considerations | 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 onYouTube YouTube Note: Since the.pdfBreakingMay 2015 < prev nextEnergy ConsumerPublic LawDepartment ofSelection

  11. Source Selection Guide | 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 onYouTube YouTube Note: Since the.pdfBreakingMayDepartment of EnergySite ScreeningSound Oil CompanySelection Guide

  12. High-Temperature Solar Selective Coating Development for Power...

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

    High-Temperature Solar Selective Coating Development for Power Tower Receivers - FY13 Q1 High-Temperature Solar Selective Coating Development for Power Tower Receivers - FY13 Q1...

  13. High-Temperature Solar Selective Coating Development for Power...

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

    High-Temperature Solar Selective Coating Development for Power Tower Receivers - FY13 Q2 High-Temperature Solar Selective Coating Development for Power Tower Receivers - FY13 Q2...

  14. Overview of the ESCO Selection Process and FEMP ESPC Templates

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

    1 Overview of the ESCO Selection Process and FEMP ESPC Templates A high-level overview of the steps towards ESCO selection is depicted in the figure below. The corresponding ESPC...

  15. High School Co-op Program Selection Process

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

    Selection Process High School Co-op Program Selection Process Point your career towards Los Alamos Lab: work with the best minds on the planet in an inclusive environment that is...

  16. An open source software selection process and a case study

    E-Print Network [OSTI]

    He, Guobin

    2009-06-02T23:59:59.000Z

    In this study, I design an empirical open source software selection process, which reuses some ideas from Commercial Off-the-Shelf selection methods and addresses the characteristics of the open source software. Basically, it consists of three basic...

  17. Student Semi-Finalist Teams Selected to Help Advance Geothermal...

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

    Student Semi-Finalist Teams Selected to Help Advance Geothermal Energy Student Semi-Finalist Teams Selected to Help Advance Geothermal Energy May 1, 2013 - 1:40pm Addthis The U.S....

  18. Lean NOx Trap Regeneration Selectivity Towards N2O -- Similarities...

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

    Regeneration Selectivity Towards N2O -- Similarities and Differences Between H2, CO and C3H6 Reductants Lean NOx Trap Regeneration Selectivity Towards N2O -- Similarities and...

  19. Use of social information for habitat selection in songbirds

    E-Print Network [OSTI]

    Farrell, Shannon Leigh

    2012-07-16T23:59:59.000Z

    that may result in improved fitness, resulting in positive behavioral responses to conspecifics as a habitat selection strategy. I conducted 3 replicated, manipulative experiments to investigate use of conspecific cues in habitat selection for the golden...

  20. An open source software selection process and a case study

    E-Print Network [OSTI]

    He, Guobin

    2009-06-02T23:59:59.000Z

    In this study, I design an empirical open source software selection process, which reuses some ideas from Commercial Off-the-Shelf selection methods and addresses the characteristics of the open source software. Basically, ...

  1. Phase selectively soluble polymer supports to facilitate homogeneous catalysis

    E-Print Network [OSTI]

    Ortiz-Acosta, Denisse

    2009-05-15T23:59:59.000Z

    Soluble polymers that have phase selective solubility are useful in synthesis because they simplify purification and separation. Such selectively soluble polymers simplify catalyst, reagent, and product recovery and enable the use of Green chemistry...

  2. Nonresonant and Resonant Frequency-Selectable Induction-Heating Targets

    E-Print Network [OSTI]

    Rodriguez, John I.

    This paper examines a scheme for developing frequency-selectable induction-heating targets for stimulating temperature-sensitive polymer gels. The phrase frequency selectable implies that each target has a frequency at ...

  3. acid induces selective: Topics by E-print Network

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

    complementarity and entanglement. Utilizing the phase selective manipulations with enviroment, it is demonstrated how the complementarity particularly induces a preservation...

  4. Federal ESPC Process Phase 2: ESCO Selection and Preliminary Assessment

    Broader source: Energy.gov [DOE]

    During phase 2 of the energy savings performance contract (ESPC) process, the agency selects an energy service company (ESCO) to proceed with project development. The selection process includes notifying all indefinite-delivery, indefinite-quantity (IDIQ) ESCOs of the opportunity, reviewing ESCO responses, and down-selecting first to two or more ESCOs, then further down-selecting to one ESCO to perform a preliminary assessment (PA).

  5. Quantifying evolution and natural selection in vertebrate noncoding sequence

    E-Print Network [OSTI]

    Hoffman, Michael M.

    2008-07-08T23:59:59.000Z

    in determining which regions of the genome are under selective pressure, and if so, what kind of selective pressure affects them (Nei and Kumar 2000; Yang and Bielawski 2000; Eyre- Walker 2006). Directional selection occurs when natural selection drives one... more elaborate method, which included partial degeneracy by considering all possible pathways between any pair of codons. Later, Nei and Gojobori (1986) devised a similar but simpler method by removing parameters shown to be unnecessary in computer...

  6. Efficient Stepwise Selection in Decomposable Models Amol Deshpande

    E-Print Network [OSTI]

    Jordan, Michael I.

    for model selection and parameter estimation are being developed by researchers in these areas [PPL97, Hin99

  7. Efficient Stepwise Selection in Decomposable Models Amol Deshpande \\Lambda

    E-Print Network [OSTI]

    Garofalakis, Minos

    for model selection and parameter estimation are being developed by researchers in these areas [PPL97, Hin99

  8. On-Site Wastewater Treatment Systems: Selecting and Permitting (Spanish)

    E-Print Network [OSTI]

    Lesikar, Bruce J.

    2005-04-30T23:59:59.000Z

    This publication explains how to select and obtain a permit for an on-site wastewater treatment system in Texas....

  9. Development of the Selective Hydrophobic Coagulation process

    SciTech Connect (OSTI)

    Yoon, R.H.; Luttrell, G.H.

    1992-01-01T23:59:59.000Z

    A novel technique for selectively coagulating and separating coal from dispersed mineral matter has been developed at Virginia Tech. The process, Selective Hydrophobic Coagulation (SHC), has been studied since 1986 under the sponsorship of the US Department of Energy (Contracts AC22-86PC91221 and AC22-90PC90174). The SHC process differs from oil agglomeration, shear or polymer flocculation, and electrolytic coagulation processes in that it does not require reagents or additives to induce the formation of coagula. In most cases, simple pH control is all that is required to (1) induce the coagulation of coal particles and (2) effectively disperse particles of mineral matter. If the coal is oxidized, a small dosage of reagents can be used to enhance the process. During the quarter, the Anutech Mark IV surface force apparatus was used to generate surface force-distance data for the mica/dodecylamine hydrochloride system (Task 2.1.1). Work to characterize the hydrophobicity of this system and the mica/DDOA[sup [minus

  10. Selective thermal and photooxidation of hydrocarbons in zeolites by oxygen

    DOE Patents [OSTI]

    Frei, Heinz (Berkeley, CA); Blatter, Fritz (Basel, CH); Sun, Hai (Saint Charles, MO)

    1999-01-01T23:59:59.000Z

    A process for selective thermal oxidation or photooxidation of hydrocarbons adsorbed onto zeolite matrices. A highly selective thermal oxidation and photooxidation of unsubstituted or alkyl substituted alkanes, alkenes, aromatics and cycloalkyls in solvent free zeolites under dark thermal conditions or under irradiation with visible light. The process oxidizes hydrocarbons almost completely selectively without substantial production of byproducts.

  11. Selective thermal oxidation of hydrocarbons in zeolites by oxygen

    DOE Patents [OSTI]

    Frei, Heinz (Berkeley, CA); Blatter, Fritz (Basel, CH); Sun, Hai (Saint Charles, MO)

    2000-01-01T23:59:59.000Z

    A process for selective thermal oxidation of hydrocarbons adsorbed onto zeolite matrices. A highly selective thermal oxidation of unsubstituted or alkyl substituted alkanes, alkenes, aromatics and cycloalkyls is carried out in solvent free zeolites under dark thermal conditions. The process oxidizes hydrocarbons almost completely selectively without substantial production of byproducts.

  12. Selective thermal and photooxidation of hydrocarbons in zeolites by oxygen

    DOE Patents [OSTI]

    Frei, Heinz (Berkeley, CA); Blatter, Fritz (Basel, CH); Sun, Hai (Saint Charles, MO)

    2001-01-01T23:59:59.000Z

    A process for a combined selective thermal oxidation and photooxidation of hydrocarbons adsorbed onto zeolite matrices. A highly combined selective thermal oxidation and photooxidation of unsubstituted or alkyl substituted alkanes, alkenes, aromatics and cycloalkyls in solvent free zeolites under dark thermal conditions or under irradiation with visible light. The process oxidizes hydrocarbons almost completely selectively without substantial production of byproducts.

  13. Random Selection with an Adversarial Majority Ronen Gradwohl

    E-Print Network [OSTI]

    Zuckerman, David

    the problem of random selection, where p players follow a protocol to jointly select a random element to jointly make a random choice from a universe of size n. They follow some protocol, and if all parties play selection is a very useful building block for distributed algorithms and cryptographic protocols, because

  14. Server-Based Dynamic Server Selection Yingfei Dong1

    E-Print Network [OSTI]

    Hou, Y. Thomas

    Server-Based Dynamic Server Selection Algorithms Yingfei Dong1 , Zhi-Li Zhang1 , and Y. Thomas Hou2 94085 thou@fla.fujitsu.com Abstract. Server selection is an important problem in replicated server systems distributed over the Internet. In this paper, we study two server selection algorithms under

  15. Original article Selection for acrolein tolerance in Drosophila

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Original article Selection for acrolein tolerance in Drosophila melanogaster L.M. Sierra' M the tolerance of D. melanogaster to the toxic action of acrolein, was carried out. At both temperatures between the lines selected at 17 °C and 24 °C were found. toxic tolerance - acrolein - selection

  16. Unsupervised Feature Selection for the k-means Clustering Problem

    E-Print Network [OSTI]

    Drineas, Petros

    Unsupervised Feature Selection for the k-means Clustering Problem Christos Boutsidis Department present a novel feature selection algorithm for the k-means clustering problem. Our algorithm any -approximate k-means algorithm ( 1) on the features selected using our method, we can find a (1

  17. Parameter Control Methods for Selection Operators in Genetic Algorithms

    E-Print Network [OSTI]

    Eiben, A.E. "Guszti"

    of such methods on three groups of test functions and conclude that varying se- lection pressure during a GA run largely on their parameters, such as population size, selection pressure, crossover and mutation rates size determines the selection pressure, and can thus be used to control the selection operator [11

  18. Feature selection in high dimensional regression problems for genomics

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Feature selection in high dimensional regression problems for genomics Julie Hamon1,2,3 , Clarisse, France julien.jacques@lifl.fr Abstract. In the context of genomic selection in animal breeding and "closed to real" datasets. Keywords: Feature selection, combinatorial optimization, regression, genomic. 1

  19. Selective thermal and photooxidation of hydrocarbons in zeolites by oxygen

    DOE Patents [OSTI]

    Frei, H.; Blatter, F.; Sun, H.

    1999-06-22T23:59:59.000Z

    A process is described for selective thermal oxidation or photooxidation of hydrocarbons adsorbed onto zeolite matrices. A highly selective thermal oxidation and photooxidation of unsubstituted or alkyl substituted alkanes, alkenes, aromatics and cycloalkyls in solvent free zeolites under dark thermal conditions or under irradiation with visible light. The process oxidizes hydrocarbons almost completely selectively without substantial production of byproducts. 19 figs.

  20. Environment-contingent sexual selection in a colour polymorphic fish

    E-Print Network [OSTI]

    Dill, Lawrence M.

    Environment-contingent sexual selection in a colour polymorphic fish Suzanne M. Gray1,*, Lawrence M environment can influence sexual selection on colourful male secondary traits such that selective advantage is environment contingent. Using a small fish endemic to Sulawesi, Indonesia (Telmatherina sarasinorum) that has