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


1

O Oc  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in3.pdfEnergyDepartment of Energy Advanced1, 2014NuclearCommission,ScienceWasteandofOc

2

Structural, microstructural and surface properties of a specific CeO{sub 2}-Bi{sub 2}O{sub 3} multiphase system obtained at 600 {sup o}C  

SciTech Connect (OSTI)

Polycrystalline samples of (1-x) CeO{sub 2}-x/2 Bi{sub 2}O{sub 3} phases, where x is the atom fraction of bismuth have been synthesized by the precipitation process and after the thermal treatment at 600 {sup o}C, under air. Samples are first characterized by the X-ray diffraction and scanning electron microscopy. To determine the samples specific surface areas, Brunauer-Emmett-Teller (BET) analyses have been performed. In the composition range 0{<=}x{<=}0.20, a cubic solid solution with fluorite structure is obtained. For compositions x comprised between 0.30 and 0.90, two types of T' (or {beta}') and T (or {beta}) tetragonal phases, similar to the well-known {beta}' or {beta} Bi{sub 2}O{sub 3} metastable structural varieties, are observed. However, the crystal cell volumes of these {beta}' or {beta} Bi{sub 2}O{sub 3} phases increase with the composition x in bismuth: this might be due to the presence of defects or substitution by cerium atoms, in the tetragonal lattices. Using X-ray diffraction profile analyses, correlations between bismuth composition x and crystal sizes or lattice distortions have been established. The solid-gas interactions between these polycrystalline materials and air-CH{sub 4} and air-CO flows have been studied as a function of temperature and composition x, using Fourier transform infrared (FTIR) analyses of the conversions of CH{sub 4} and CO gases into the CO{sub 2} gas. The transformations of CH{sub 4} and CO molecules as a function of time and temperature are determined through the intensities of FTIR CO{sub 2} absorption bands. Using the specific surface areas determined from BET analyses, these FTIR intensities have been normalized and compared. For all bismuth compositions, a low catalytic reactivity is observed with air-CH{sub 4} gas flows, while, for the highest bismuth compositions, a high catalytic reactivity is observed with air-CO gas flows. -- Graphical abstract: Catalytic efficiencies of CeO{sub 2}-Bi{sub 2}O{sub 3}system: catalytic actions on methane (on the left) or carbon monoxide (on the right) of (1-x)CeO{sub 2}-x/2 Bi{sub 2}O{sub 3} samples, as a function of the fraction x, and for fixed temperatures: on the vertical axis, the intensities of CO{sub 2} FTIR absorption bands are reported. Strong efficiency of bismuth rich samples for CO conversion. Display Omitted Research highlights: {yields} Stabilization of metastable polymorph Bi{sub 2}O{sub 3} phases in the mix system [(1-x)CeO{sub 2}+(x/2)Bi{sub 2}O{sub 3}] at 600 {sup o}C. {yields} Solid gas interactions between this system and air-CO or air-CH{sub 4} gas flows at various temperatures and bismuth compositions. {yields} High efficiency of bismuth rich samples to convert CO into CO{sub 2}.

Bourja, Lamia; Bakiz, Bahcine [Institut Materiaux Microelectronique et Nanosciences de Provence, IM2NP, UMR CNRS 6242, Universite du Sud Toulon-Var, BP 20132, 83957 La Garde Cedex (France); Laboratoire Materiaux et Environnement LME, Faculte des Sciences, Universite Ibn Zohr, BP 8106, Cite Dakhla, Agadir, Maroc (Morocco); Benlhachemi, Abdeljalil; Ezahri, Mohamed [Laboratoire Materiaux et Environnement LME, Faculte des Sciences, Universite Ibn Zohr, BP 8106, Cite Dakhla, Agadir, Maroc (Morocco); Villain, Sylvie [Institut Materiaux Microelectronique et Nanosciences de Provence, IM2NP, UMR CNRS 6242, Universite du Sud Toulon-Var, BP 20132, 83957 La Garde Cedex (France); Crosnier, Olivier [Laboratoire de Genie des Materiaux et Procedes Associes, Polytech Nantes, rue Christian Pauc BP 50609, 44306 Nantes Cedex 3 (France); Favotto, Claude [Institut Materiaux Microelectronique et Nanosciences de Provence, IM2NP, UMR CNRS 6242, Universite du Sud Toulon-Var, BP 20132, 83957 La Garde Cedex (France); Gavarri, Jean-Raymond, E-mail: gavarri.jr@univ-tln.f [Institut Materiaux Microelectronique et Nanosciences de Provence, IM2NP, UMR CNRS 6242, Universite du Sud Toulon-Var, BP 20132, 83957 La Garde Cedex (France)

2011-03-15T23:59:59.000Z

3

Microdomains, solid solutions and the {open_quotes}defect fluorite{close_quotes} to C-type sesquioxide transition in CeO{sub 2}-RO{sub 1.5} and ZrO{sub 2}-RO{sub 1.5} systems  

SciTech Connect (OSTI)

Satellite dark field (SDF) imaging is used to show that there is a definite change in symmetry on moving across the two phase region separating the so-called {open_quotes}defect fluorite{close_quotes} and C-type sesquioxide solid solution regions in (1-x)CeO{sub 2}.xRO{sub 1.5} and (1-x)ZrO{sub 2}.xRO{sub 1.5} systems. SDF images of the {open_quotes}defect fluorite{close_quotes} side of the two-phase region are characterized by a microdomain texture on the {approximately}100-200 {angstrom} scale and the local symmetry within any one of these microdomains is shown to be lower than cubic. Corresponding SDF images of the C-type sesquioxide side of the two-phase region are by contrast homogeneous and consistent with Ia3 space group symmetry. The nature of the local oxygen vacancy distribution on either side of the two-phase region is discussed and a possible model for the {open_quotes}defect fluorite{close_quotes} side of the two-phase region proposed.

Withers, R.L.; Thompson, J.G.; Gabbitas, N.; Wallenburg, L.R.; Welberry, T.R. [Australian National Univ., Canberra (Australia)] [Australian National Univ., Canberra (Australia)

1995-12-01T23:59:59.000Z

4

OCS National Compendium  

SciTech Connect (OSTI)

The Minerals Management Service's (MMS) Outer Continental Shelf Information Program (OCSIP) is responsible for making available to affected coastal States, local governments, and other interested parties data and information related to the Outer Continental Shelf (OCS) Oil and Gas Program. Since its establishment through Section 26 of the OCS Lands Act (OCSLA) Amendments of 1978, OCSIP has prepared regional summary reports, updates, and indexes on leasing, exploration, development, and production activities to fulfill the mandates of the OCSLA Amendments. The OCSIP receives many requests for out-of-print summary reports, updates, and indexes. The purpose of the OCS National Compendium is to consolidate these historical data and to present the data on an OCS-wide and regional scale. The single-volume approach allows the reader access to historical information and facilitates regional comparisons. The fold-out chart in the front of this publication provides the reader with a timeline (January 1988--November 1990) of events since publication of the last Compendium. Some of the events are directly related to the 5-year Oil and Gas Program, whereas others may or may not have an effect on the program. A predominantly graphic format is used in the report so that the large accumulation of data can be more readily comprehended. In some cases, it is not possible to update information through October 21, 1990, because of the nature of the data. For example, production data normally lags 3 months. 58 figs., 37 tabs.

Gould, G.J.; Karpas, R.M.; Slitor, D.L.

1991-06-01T23:59:59.000Z

5

Ncy le 07 07 08 Dploiement de paquet grce OCS Inventory.  

E-Print Network [OSTI]

Ncy le 07 07 08 Déploiement de paquet grâce à OCS Inventory. Stagiaire licence Pro de l'IUT Charlemagne NANCY : Stéphane Crémel Encadrement William Sayer & Olivier Servas Pré-requis : OCS Inventory déploiement d'OCS Inventory NG soit installé sur les ordinateurs. Pour cela, utiliser mon paquet qui permet d

van Tiggelen, Bart

6

2OC | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating SolarElectric Coop,SaveWhiskey Flatshydro Homepowering9century Green SolutionsOC Jump

7

Study of the OCS6 Lattice Using Frequency Maps  

E-Print Network [OSTI]

Frequency maps for the OCS5 and OCS6Frequency maps for the OCS6 lattice for a tune of Q x =tunes. . . . . . . . . Frequency maps for the OCS6 lattice

Reichel, Ina

2007-01-01T23:59:59.000Z

8

3 , LNG (Liquefied Natural Gas) -165oC  

E-Print Network [OSTI]

, , . . . , . , LNG (Liquefied Natural Gas) -165oC , . (Piped Natural Gas, PNG) , , . PNG, LNG ( 2-3 ), . (Natural Gas Hydrate, NGH) / . -20oC / . Natural Gas Hydrate (NGH) Liquefied Natural Gas (LNG) Modes of Transport and Storage

Hong, Deog Ki

9

The effects of variable operation on RO plant performance  

E-Print Network [OSTI]

Optimizations of reverse osmosis (RO) plants typically consider steady state operation of the plant. RO plants are subject to transient factors that may make it beneficial to produce more water at one time than at another. ...

Williams, Christopher Michael, S.M. Massachusetts Institute of Technology

2011-01-01T23:59:59.000Z

10

The seismology programme of CoRoT  

E-Print Network [OSTI]

We introduce the main lines and specificities of the CoRoT Seismology Core Programme. The development and consolidation of this programme has been made in the framework of the CoRoT Seismology Working Group. With a few illustrative examples, we show how CoRoT data will help to address various problems associated with present open questions of stellar structure and evolution.

Michel, E; Auvergne, M; Catala, C

2008-01-01T23:59:59.000Z

11

Peter C. Chu Mail Code: OC/Cu  

E-Print Network [OSTI]

Journal of Oceanography, 2008 - present · Editorial Board, the Open Ocean Engineering Journal, 2007Peter C. Chu Professor Mail Code: OC/Cu Department of Oceanography Graduate School of Engineering and Applied Sciences & Wayne E. Meyer Institute of Systems Engineering Monterey, CA 93943 Phone: 831

12

Perlick: ENERGY STAR Referral (HP48RO-S)  

Broader source: Energy.gov [DOE]

DOE referred Perlick refrigerator HP48RO-S to EPA, brand manager of the ENERGY STAR program, for appropriate action after DOE testing revealed that the model does not meet ENERGY STAR requirements.

13

Operational experience of the OC-OTEC experiments at NELH  

SciTech Connect (OSTI)

The Solar Energy Research Institute, under funding and program direction from the US Department of Energy, has been operating a small-scale test apparatus to investigate key components of open- cycle ocean thermal energy conversion (OC-OTEC). The apparatus started operations in October 1987 and continues to provide valuable information on heat-and mass-transfer processes in evaporators and condensers, gas sorption processes as seawater is depressurized and repressurized, and control and instrumentation characteristics of open-cycle systems. Although other test facilities have been used to study some of these interactions, this is the largest apparatus of its kind to use seawater since Georges Claude`s efforts in 1926. The information obtained from experiments conducted in this apparatus is being used to design a larger scale experiment in which a positive net power production is expected to be demonstrated for the first time with OC-OTEC. This paper describes the apparatus, the major tests conducted during its first 18 months of operation, and the experience gained in OC-OTEC system operation. 13 refs., 8 figs.

Link, H.

1989-02-01T23:59:59.000Z

14

* Phys 222 may be substituted for Chem 178/178L ** CE 460 may be substituted for CE 333 or CE 334  

E-Print Network [OSTI]

(Structural Analysis I) 3 CE 372 (Engr Hydro & Hydraulics) 3 CE 360 (Geotechnical Engineering) 3 CE 382 (Engr Hydro & Hydraulics) 3 CE 355 (Transportation Engr) 3 CE 382 (Design of Concretes) 3 CE 326 Design) 3 Numerical Analysis Elective 3 CE 485 (CE Design I) 2 Micro 201 (General Microbiology) 3 Engr

Lin, Zhiqun

15

Oc. 13, 2004Oc. 13, 2004 International Conference of Spatial CognitionInternational Conference of Spatial Cognition 2004, Frausenchiemsee, Germany2004, Frausenchiemsee, Germany  

E-Print Network [OSTI]

of Spatial Cognition 2004, Frausenchiemsee, Germany2004, Frausenchiemsee, Germany 11 Recognizing Variable & Informatics University of BremenUniversity of Bremen GermanyGermany #12;Oc. 13, 2004Oc. 13, 2004 International Conference of Spatial CognitionInternational Conference of Spatial Cognition 2004, Frausenchiemsee, Germany

Bremen, Universität

16

Characterization of CeO2-Supported Cu-Pd Bimetallic Catalyst for the Oxygen-Assisted Water-Gas Shift Reaction  

SciTech Connect (OSTI)

This study was focused to investigate the roles of Cu and Pd in CuPd/CeO2 bimetallic catalysts containing 20-30 wt% Cu and 0.5-1 wt% Pd used in the oxygen-assisted water-gas shift (OWGS) reaction employing a combined bulk and surface characterization techniques such as XRD, TPR, CO chemisorption, and in-situ XPS. The catalytic activity for CO conversion and the stability of catalyst during on-stream operation increased by the addition of Cu to Pd/CeO2 or Pd to Cu/CeO2 monometallic catalysts, especially when the OWGS reaction was performed under low temperatures, below 200oC. The bimetallic catalyst after leaching with nitric acid retained about 60% of its original activity. The TPR of monometallic Cu/CeO2 showed reduction of CuO supported on CeO2 in two distinct regions, around 150 and 250oC. The high temperature peak disappeared and reduction occurred in a single step around 150oC upon Pd addition. The Pd dispersion decreased from 38.5% for Pd/CeO2 to below 1% for CuPd/CeO2 bimetallic catalyst. In-situ XPS studies showed a shift in Cu 2p peaks toward lower binding energy (BE) with concommitant shift in the Pd 3d peaks toward higher BE. Addition of Pd decreased the surface Cu concentration while the concentration of Pd remained unaltered. All these observations indicated the formation of Cu-Pd surface alloy. The valence band XP spectra collected below 10 eV corroborated the core level XP spectra and indicated that Cu is mainly involved in the catalytic reaction. The improved catalytic activity and stability of CuPd/CeO2 bimetallic catalyst was attributed to the alloy formation.

Fox, Elise; Velu, Subramani; Engelhard, Mark H.; Chin, Ya-Huei; Miller, Jeffrey T.; Kropf, Jeremy; Song, Chunshan

2008-12-10T23:59:59.000Z

17

Some recent results for the roAp stars  

E-Print Network [OSTI]

Three topics are discussed: 1) Photometric observations of the rapidly oscillating Ap stars have shown that the pulsation amplitude drops dramatically as a function of wavelength from the blue to the red. A theoretical derivation, plus modelling, indicates that this is because the vertical wavelength of the pulsation mode is short compared to the scale height of the atmosphere; in fact, it indicates that we are seeing a pulsation node in the observable atmosphere. Radial velocity observations, and theoretical calculations now support this. The implication for other research on CP stars is that this can provide observational constraints on the atmospheric structure independent of traditional spectral analysis. 2) Luminosities of roAp stars can be determined from asteroseismology. A recent comparison of such asteroseismic luminosities with HIPPARCOS luminosities is shown. This suggests that roAp stars have lower temperatures and/or smaller radii than previous models have used, or that the magnetic fields in these stars alter the frequency separations. 3) The latest results of our long-term monitoring of the pulsation frequencies in certain roAp stars are discussed. There is a clear cyclic variability to the pulsation cavity, hence the sound speed and/or sound travel time (radius) of these stars. This might be indicative of magnetic cycles at a level that magnetic measurements cannot currently detect, although there is no theoretical support for such an idea.

D. W. Kurtz

1998-05-05T23:59:59.000Z

18

Reverse osmosis (RO) treatment of Tucson's share of Central Arizona Project (CAP) water is being con-  

E-Print Network [OSTI]

Reverse osmosis (RO) treatment of Tucson's share of Central Arizona Project (CAP) water is being for RO Treatment of CAP Water PROJECT TEAM This Arizona Water Institute PROJECT FACT SHEET is part improve- ments in both are needed to make RO treatment of CAP water truly cost-effective. The results

Fay, Noah

19

Definition of the Semisubmersible Floating System for Phase II of OC4  

SciTech Connect (OSTI)

Phase II of the Offshore Code Comparison Collaboration Continuation (OC4) project involved modeling of a semisubmersible floating offshore wind system as shown below. This report documents the specifications of the floating system, which were needed by the OC4 participants for building aero-hydro-servo-elastic models.

Robertson, A.; Jonkman, J.; Masciola, M.; Song, H.; Goupee, A.; Coulling, A.; Luan, C.

2014-09-01T23:59:59.000Z

20

Femtosecond Transition-State Dynamics of Dissociating OCS on the Excited 1+ Potential Energy Surface  

E-Print Network [OSTI]

Femtosecond Transition-State Dynamics of Dissociating OCS on the Excited 1+ Potential Energy photodissociation dynamics of OCS on the dissociative potential energy surface (PES) of the electronically excited 1 calculations. The high-resolution PHOFEX spectrum of the entire 1+-1+ transition (63 300-69 350 cm-1

Liu, Shilin

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


21

Definition of the Floating System for Phase IV of OC3  

SciTech Connect (OSTI)

Phase IV of the IEA Annex XXIII Offshore Code Comparison Collaboration (OC3) involves the modeling of an offshore floating wind turbine. This report documents the specifications of the floating system, which are needed by the OC3 participants for building aero-hydro-servo-elastic models.

Jonkman, J.

2010-05-01T23:59:59.000Z

22

Update: Proposed CE Curriculum & Program  

E-Print Network [OSTI]

Update: Proposed CE Curriculum & Program Bruce Jacob, End of Summer 2008 #12;What's all this, then, students, graduates · Held constituents' meeting over winter · Group vote this curriculum Barua has agreed to develop and teach the course ENEE 3xx (Digital systems) -- new course Bruce Jacob

Jacob, Bruce

23

College of Engineering CE Civil Engineering  

E-Print Network [OSTI]

College of Engineering CE Civil Engineering KEY: # = new course * = course changed = course.Lecture,twohours;laboratory,fourhoursperweek.Prereqorcoreq:MA113orconsentofinstructor. CE 120 INTRODUCTION TO CIVIL ENGINEERING. (1) An introduction to the civil engineering profession and the use of computer hardware and software in CE systems analysis and design

MacAdam, Keith

24

Ro(g)-graded equivariant cohomology theory and sheaves  

E-Print Network [OSTI]

consequence of the latter is that we get a simple model of the Eilenberg-MacLane space K(M;V). Proposition II.18 further identi es the homotopy groups of the G- xed subset of this model space with some RO(G)-graded Bredon cohomology groups of a point... XH ! = HomG-Top(G=H;X); 6 where sends a2XH to fa : G=H!X with fa(gH) = ga. The inverse of sends f2HomG-Top(G=H;X) to f(H). Proof. See [tD87, p. 25, Proposition 3.8]. If (X j 2J) is a collection of G-spaces then the product Q 2J X is again a G...

Yang, Haibo

2009-05-15T23:59:59.000Z

25

New measurements of magnetic fields of roAp stars with FORS1 at the VLT  

E-Print Network [OSTI]

Magnetic fields play a key role in the pulsations of rapidly oscillating Ap (roAp) stars since they are a necessary ingredient of all pulsation excitation mechanisms proposed so far. This implies that the proper understanding of the seismological behaviour of the roAp stars requires knowledge of their magnetic fields. However, the magnetic fields of the roAp stars are not well studied. Here we present new results of measurements of the mean longitudinal field of 14 roAp stars obtained from low resolution spectropolarimetry with FORS1 at the VLT.

S. Hubrig; T. Szeifert; M. Schoeller; G. Mathys; D. W. Kurtz

2003-09-21T23:59:59.000Z

26

PRE-DISCOVERY OBSERVATIONS OF CoRoT-1b AND CoRoT-2b WITH THE BEST SURVEY  

SciTech Connect (OSTI)

The Berlin Exoplanet Search Telescope (BEST) wide-angle telescope installed at the Observatoire de Haute-Provence and operated in remote control from Berlin by the Institut fuer Planetenforschung, DLR, has observed the CoRoT target fields prior to the mission. The resulting archive of stellar photometric light curves is used to search for deep transit events announced during CoRoT's alarm mode to aid in fast photometric confirmation of these events. The 'initial run' field of CoRoT (IRa01) was observed with BEST in 2006 November and December for 12 nights. The first 'long run' field (LRc01) was observed from 2005 June to September for 35 nights. After standard CCD data reduction, aperture photometry has been performed using the ISIS image subtraction method. About 30,000 light curves were obtained in each field. Transits of the first detected planets by the CoRoT mission, CoRoT-1b and CoRoT-2b, were found in archived data of the BEST survey and their light curves are presented here. Such detections provide useful information at the early stage of the organization of follow-up observations of satellite alarm-mode planet candidates. In addition, no period change was found over {approx}4 years between the first BEST observation and last available transit observations.

Rauer, H.; Erikson, A.; Kabath, P.; Hedelt, P.; Csizmadia, Sz.; Paris, P. v.; Renner, S.; Titz, R.; Voss, H. [Deutsches Zentrum fuer Luft- und Raumfahrt (DLR), Institut fuer Planetenforschung, Rutherfordstr. 2, 12489 Berlin (Germany); Boer, M.; Tournois, G. [Observatoire de Haute Provence, St. Michel-l'Observatoire 04870 (France); Carone, L. [Rheinisches Institut fuer Umweltforschung, Universitaet zu Koeln, Abt. Planetenforschung, Aachener Str. 209, 50931 Koeln (Germany); Eigmueller, P. [Thueringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg (Germany)

2010-01-15T23:59:59.000Z

27

CE Geothermal | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin: EnergyBoston Areais3: Crystalline Rock - Basement JumpGeneral: CDOT Name: CE

28

International Refrigeration: Order (2012-CE-1510) | Department...  

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

Refrigeration: Order (2012-CE-1510) July 20, 2012 DOE ordered International Refrigeration Products to pay an 8,000 civil penalty after finding International Refrigeration had...

29

Table 1. Connection of Criterion 8 CE Outcomes to CE Courses (required, design elective, advanced elective)  

E-Print Network [OSTI]

treatment Biological wastewater treatment (d) Proficiency in Water Resources Engineering CE 3305 CE 3354 CE systems Design of advance water treatment systems Design of biological wastewater treatment systems (g ENVE 4391 ENVE 4399 Water, wastewater, air, solid waste Physical and chemical treatment Advanced water

Gelfond, Michael

30

Formulier R&O startgesprek | Faculteit W&N | versie januari 2009 Pagina 1 van 3  

E-Print Network [OSTI]

/begeleider Beoordelingsautoriteit ... Datum in dienst Datum R&O startgesprek 200 In het R&O startgesprek wordt het UFO - Wachtwoord leiden7 Van toepassing zijnde resultaatgebieden uit het UFO profiel Toevoegen van behalen resultaten op basis van de resultaatgebieden uit het UFO profiel, opgedragen taken, competenties

Hille, Sander

31

Thermoelectric Couple Demonstration of (In, Ce)-based Skutterudite...  

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

Couple Demonstration of (In, Ce)-based Skutterudite Materials for Automotive Energy Recovery Thermoelectric Couple Demonstration of (In, Ce)-based Skutterudite Materials for...

32

Lumiram Electric: Order (2010-CE-1014) | Department of Energy  

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

Lumiram Electric: Order (2010-CE-1014) Lumiram Electric: Order (2010-CE-1014) November 23, 2010 DOE issued an Order and entered into a Compromise Agreement with Lumiram Electric...

33

464 Fossil humans and 1014% H with 25% S and the remainder oc-  

E-Print Network [OSTI]

of the fossil fuels is the heating value of the fuel, which is mea- sured as the amount of heat energy produced (eds.), Fossil Fuels Utilization: En- vironmental Concerns, 1986; R. A. Meyers (ed.), Coal Handbook464 Fossil humans and 10­14% H with 2­5% S and the remainder oc- curring as N (

Delson, Eric

34

Lectures 1-2 GFD-2 OC513 P.B. Rhines (Oceanography &  

E-Print Network [OSTI]

of final · math review; GFD-1 review: see class website: www.ocean.washington.edu/research/gfd/oc513-gfd2 to global warming, in part natural variability over decade-to-century 5me scales #12 of the modern world of electronics, electromagneEc fields (light, infrared radiaEon, x

35

OCS instructions rev 01/14 pg. 1 ONLINE COURSE SELECTION INSTRUCTIONS  

E-Print Network [OSTI]

and review courses of interest Upon entering OCS you will be at the course search page. Links at the left. The course search page allows you to search for courses in a selected term using the following criteria(s) Distributional credits Key words (useful for searching for anywhere in the course information) Enter your search

36

OC3 -- Benchmark Exercise of Aero-Elastic Offshore Wind Turbine Codes: Preprint  

SciTech Connect (OSTI)

This paper introduces the work content and status of the first international investigation and verification of aero-elastic codes for offshore wind turbines as performed by the "Offshore Code Comparison Collaboration" (OC3) within the "IEA Wind Annex XXIII -- Subtask 2".

Passon, P.; Kuhn, M.; Butterfield, S.; Jonkman, J.; Camp, T.; Larsen, T. J.

2007-08-01T23:59:59.000Z

37

WAVES OC514 Spring 2012 P.B. Rhines Term project ideas  

E-Print Network [OSTI]

WAVES OC514 Spring 2012 P.B. Rhines Term project ideas 10 Apr 2012 1. Coastal trapped waves signals, seasonal cycles, wind-driven signals 2. ENSO (el Nino/Southern Oscillation) and equatorial waves events? Atmospheric Kelvin and Rossby waves bridging from one ocean to the next. Gill model

38

DR. J. ROSS MACDONALD IMPEDANCE SPECTROSCOPY AND THE roUBLE  

E-Print Network [OSTI]

DR. J. ROSS MACDONALD CHAPTER I IMPEDANCE SPECTROSCOPY AND THE roUBLE LAYER IN SOLIDS AND LIQillDS· J. ROSS MACDONALD, Department of Physics and Astronomy, University of North Carolina, Chapel Hill

Macdonald, James Ross

39

The Hvar survey for roAp stars: II. Final results (Research Note)  

E-Print Network [OSTI]

The 60 known rapidly oscillating Ap (roAp) stars are excellent laboratories to test pulsation models in the presence of stellar magnetic fields. Our survey is dedicated to search for new group members in the Northern Hemisphere. We attempt to increase the number of known chemically peculiar stars that are known to be pulsationally unstable. About 40 h of new CCD photometric data of 21 roAp candidates, observed at the 1m Austrian-Croatian Telescope (Hvar Observatory) are presented. We carefully analysed these to search for pulsations in the frequency range of up to 10mHz. No new roAp star was detected among the observed targets. The distribution of the upper limits for roAp-like variations is similar to that of previoius similar efforts using photomultipliers and comparable telescope sizes. In addition to photometric observations, we need to consolidate spectroscopic information to select suitable targets.

Paunzen, E; Rode-Paunzen, M; Handler, G; Bozic, H

2015-01-01T23:59:59.000Z

40

The asteroseismic ground-based observational counterpart of CoRoT  

E-Print Network [OSTI]

We present different aspects of the ground-based observational counterpart of the CoRoT satellite mission. We give an overview of the selected asteroseismic targets, the numerous instruments and observatories involved, and the first scientific results.

Uytterhoeven, K; Mathias, P; Amado, P J; Rainer, M; Martin-Ruiz, S; Rodrguez, E; Paparo, M; Pollard, K; Maceroni, C; Balaguer-Nunoz, L; Ribas, I; Catala, C; Neiner, C; Garca, R A

2009-01-01T23:59:59.000Z

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


41

The Ro (S)-graded equivariant homotopy of THH(Fp)  

E-Print Network [OSTI]

The main result of this thesis is the computation of ... for ... These RO(S)-graded TR-groups are the equivariant homotopy groups naturally associated to the S-spectrum THH(Fp), the topological Hochschild S-spectrum. ...

Gerhardt, Teena Meredith

2007-01-01T23:59:59.000Z

42

RoACH: An autonomous 2.4g crawling hexapod robot Aaron M. Hoover, Erik Steltz, Ronald S. Fearing  

E-Print Network [OSTI]

RoACH: An autonomous 2.4g crawling hexapod robot Aaron M. Hoover, Erik Steltz, Ronald S. Fearing and battery, RoACH is the smallest and lightest autonomous legged robot produced to date. I. INTRODUCTION.4g robotic, autonomous, crawling hexapod (RoACH) capable of sustained locomotion. The robot makes use

Fearing, Ron

43

ADVISER ROOM # EMAIL ADDRESS Adams 221 COBH (eda@ce.montana.edu)  

E-Print Network [OSTI]

, Michael L. Adams Senior CE Betcher, Jacob M. Lewandowski Freshman CE Bigelow, Adam J. (F 11) Larsson Sophomore CE Deen, Michael Perkins Junior CE Devoe, Colleen L. (1st deg Arch) Larsson Sophomore CE #12;DeWitt

Dyer, Bill

44

Transiting exoplanets from the CoRoT space mission VIII. CoRoT-7b: the first Super-Earth with measured radius  

E-Print Network [OSTI]

We report the discovery of very shallow (DF/F = 3.4 10-4), periodic dips in the light curve of an active V = 11.7 G9V star observed by the CoRoT satellite, which we interpret as due to the presence of a transiting companion. We describe the 3-colour CoRoT data and complementary ground-based observations that support the planetary nature of the companion. Methods. We use CoRoT color information, good angular resolution ground-based photometric observations in- and out- of transit, adaptive optics imaging, near-infrared spectroscopy and preliminary results from Radial Velocity measurements, to test the diluted eclipsing binary scenarios. The parameters of the host star are derived from optical spectra, which were then combined with the CoRoT light curve to derive parameters of the companion. We examine carefully all conceivable cases of false positives, and all tests performed support the planetary hypothesis. Blends with separation larger than 0.40 arcsec or triple systems are almost excluded with a 8 10-4 ris...

Lger, A; Schneider, J; Barge, P; Fridlund, M; Samuel, B; Ollivier, M; Gnther, E; Deleuil, M; Deeg, H J; Auvergne, M; Alonso, R; Aigrain, S; Alapini, A; Almenara, J M; Baglin, A; Barbieri, M; Bruntt, H; Borde, P; Bouchy, F; Cabrera, J; Catala, C; Carone, L; Carpano, S; Csizmadia, Sz; Dvorak, R; Erikson, A; Ferraz-Mello, S; Foing, B; Fressin, F; Gandolfi, D; Gillon, M; Gondoin, Ph; Grasset, O; Guillot, T; Hatzes, A; Hbrard, G; Jorda, L; Lammer, H; Llebaria, A; Loeillet, B; Mayor, M; Mazeh, T; Moutou, C; Paetzold, M; Pont, F; Queloz, D; Rauer, H; Renner, S; Samadi, R; Shporer, A; Sotin, Ch; Tingley, B; Wuchterl, G

2009-01-01T23:59:59.000Z

45

STRUCTURE OF PENTAKIS (UREA) DIOXOURANIUM(VI)NITRATE LUO2 (OC (NH2)2)5 (NO3) 2  

E-Print Network [OSTI]

2(OC(NH 2 )2)5](N0 3 )2 by Allan Zalkin*, Helena Ruben andU0 2 (OC(NH 2)2)5](N0 3)2 by Allan Zalkin, Hel~na Ruben and

Zalkin, Allan

2011-01-01T23:59:59.000Z

46

Experiences with TCP/IP over an ATM OC12 WAN  

SciTech Connect (OSTI)

This paper discusses the performance testing experiences of a 622.08 Mbps OC12 link. The link will be used for large bulk data transfer, and as such, of interest are both the ATM level throughput rates and end-to-end TCP/IP throughput rates. Tests were done to evaluate the ATM switches, the IP routers, the end hosts, as well as the underlying ATM service provided by the carrier. A low level of cell loss, (resulting in <.01 % packet loss), decreased the TCP throughput rate considerably when one TCP flow was trying to use the entire OC12 bandwidth. Identifying and correcting cell loss in the network proved to be extremely difficult. TCP Selective Acknowledgement (SACK) improved performance dramatically, and the maximum throughput rate increased from 300 Mbps to 400 Mbps. The effects of TCP slow start on performance at OC12 rates are also examined, and found to be insignificant for very large file transfers (e.g., for a 10 GB file). Finally, a history of TCP performance over high-speed networks is presented.

Nitzan, Rebecca L.; Tierney, Brian L.

1999-12-23T23:59:59.000Z

47

OC$78@MU%3!<%Q%9$N7ABVAG2r@O Fb85 @65. y LnH* <~ y ;3ED FF y 4X:, Ao z 0f:486 6Q y  

E-Print Network [OSTI]

$rkJ}K! (Nc$($P (3) $J$I) $G$"$j!"$b$&0l$D$O L$CN8l$G$b2r@O$G$­$k$h$&$J%b%G%k$r:n@.$9$kJ}K! (Nc$( $P (4, 5) $J$I) $G$"$k!#$3$3$G!"A0

Sekine, Satoshi

48

Study of HD 169392A observed by CoRoT and HARPS  

E-Print Network [OSTI]

The numerous results obtained with asteroseismology thanks to space missions such as CoRoT and Kepler are providing a new insight on stellar evolution. After five years of observations, CoRoT is going on providing high-quality data. We present here the analysis of the double star HD169392 complemented by ground-based spectroscopic observations. This work aims at characterizing the fundamental parameters of the two stars, their chemical composition, the acoustic-mode global parameters including their individual frequencies, and their dynamics. We have analysed HARPS observations of the two stars to retrieve their chemical compositions. Several methods have been used and compared to measure the global properties of acoustic modes and their individual frequencies from the photometric data of CoRoT. The new spectroscopic observations and archival astrometric values suggest that HD169392 is a wide binary system weakly bounded. We have obtained the spectroscopic parameters for both components, suggesting the origin...

Mathur, S; Catala, C; Benomar, O; Davies, G R; Garcia, R A; Salabert, D; Ballot, J; Mosser, B; Regulo, C; Chaplin, W J; Elsworth, Y; Handberg, R; Hekker, S; Mantegazza, L; Michel, E; Poretti, E; Rainer, M; Roxburgh, I W; Samadi, R; Steslicki, M; Uytterhoeven, K; Verner, G A; Auvergne, M; Baglin, A; Forteza, S Barcelo; Baudin, F; Cortes, T Roca

2012-01-01T23:59:59.000Z

49

Report on the CoRoT Evolution and Seismic Tools Activity  

E-Print Network [OSTI]

We present the work undertaken by the Evolution and Seismic Tools Activity (ESTA) team of the CoRoT Seismology Working Group. We have focused on two main tasks: Task 1 - now finished - has aimed at testing, comparing and optimising seven stellar evolution codes which will be used to model the internal structure and evolution of the CoRoT target stars. Task 2, still underway, aims at testing, comparing and optimising different seismic codes used to calculate the oscillations of models for different types of stars. The results already obtained are quite satisfactory, showing minor differences between the different numerical tools provided the same assumptions on the physical parameters are made. This work gives us confidence on the numerical tools that will be available to interpret the future CoRoT seismic data.

Monteiro, M J P F G; Montalban, J; Christensen-Dalsgaard, J; Castro, M; Degl'Innocenti, S; Moya, A; Roxburgh, I W; Scuflaire, R; Baglin, A; Cunha, M S; Eggenberger, P; Fernandes, J; Goupil, M J; Hui-Bon-Hoa, A; Marconi, M; Marques, J P; Michel, E; Miglio, A; Morel, P; Pichon, B; Moroni, P G P; Provost, J; Ruoppo, A; Surez, J C; Suran, M; Teixeira, T C

2006-01-01T23:59:59.000Z

50

Comparison of CeBr3 with LaBr3:Ce, LaCl3:Ce, and NaI:Tl Detectors  

SciTech Connect (OSTI)

Energy resolution and detection efficiency were compared between two sizes of cerium bromide (CeBr3) scintillators, three sizes of lanthanum bromide (LaBr3:Ce) scintillators, three sizes of sodium iodide (NaI:Tl) scintillators, and a lanthanum chloride (LaCl3:Ce) scintillator. Comparisons are made of key parameters such as energy resolution, detection efficiency, linearity, and self-activity of CeBr3, LaBr3:Ce, LaCl3:Ce, and NaI:Tl scintillator detectors. The scintillator detectors are tested by comparing the peak separation and identification in the energy range up to 3.0 MeV using 133Ba, 152Eu, and naturally occurring radioactive materials [1]. The study has shown that CeBr3 scintillator detectors provided by Saint-Gobain offer better resolution than NaI:Tl scintillator detectors. CeBr3 detectors could resolve some closely spaced peaks from 133Ba and 152Eu, which NaI:Tl could not. LaBr3:Ce has slightly better resolution, and a slightly higher efficiency than CeBr3. In this work, self-activity of each of these four detector types was measured by operating the detectors themselves. A comparison of the intrinsic activity for all of the detectors in this study is demonstrated. For CeBr3, the self-activity present may be reduced, or even eliminated in the future, through improved processes for growing the material. It will be discussed if, and under what conditions, CeBr3 may be better than LaBr3:Ce and LaCl3:Ce for detection of certain special nuclear material ?-rays [2]. An overall advantage of CeBr3 detectors over lanthanum halide and NaI:Tl detectors will be discussed.

,

2010-09-01T23:59:59.000Z

51

Building Technologies Program: Tax Deduction Qualified Software- Owens Corning Commercial Energy Calculator (OC-CEC) version 1.1  

Broader source: Energy.gov [DOE]

Provides required documentation that Owens Corning Commercial Energy Calculator (OC-CEC) version 1.1 meets Internal Revenue Code 179D, Notice 2006-52, dated June 2, 2006, for calculating commercial building energy and power cost savings.

52

CIVIL ENGINEERING PREREQUISITE SUMMARY Note: BSCE candidate means that you have been admitted to upper division. CE enrolled means you are listed  

E-Print Network [OSTI]

3316 Transportation Engineering BSCE cand. CE 3426 Soil Mechanics CE 2425, CE 2017, BSCE cand. CE 4096 & Engineering Drawing CE 2017 CE 3016 Surveying Math 1297 CE 3025 Environmental Engineering Chem 1151 or 1153 and 1154, CE 3221, BSCE cand. CE 3026 Project Management None CE 3027 Infrastructure Materials CE 2017

Levinson, David M.

53

UniverSity of MiaMi roSenStiel SChool of Marine and atMoSpheriC SCienCe  

E-Print Network [OSTI]

rickenbacker Causeway Miami, florida 33149 http://www.rsmas.miami.edu Carbonate Sedimentology Carbonates act research. a history of carbonate sedimentology Rosenstiel School scientists pioneered work in the comparative sedimentology of carbonate sediments in the early 1970s. This early work set the foundation

Miami, University of

54

Analysis of the permitting processes associated with exploration of Federal OCS leases. Final report. Volume II. Appendices  

SciTech Connect (OSTI)

Under contract to the Office of Leasing Policy Development (LPDO), Jack Faucett Associates is currently undertaking the description and analysis of the Outer Continental Shelf (OCS) regulatory process to determine the nature of time delays that affect OCS production of oil and gas. This report represents the results of the first phase of research under this contract, the description and analysis of regulatory activity associated with exploration activities on the Federal OCS. Volume 1 contains the following three sections: (1) study results; (2) Federal regulatory activities during exploration of Federal OCS leases which involved the US Geological Survey, Environmental Protection Agency, US Coast Guard, Corps of Engineers, and National Ocean and Atmospheric Administration; and (3) state regulatory activities during exploration of Federal OCS leases of Alaska, California, Louisiana, Massachusetts, New Jersey, North Carolina and Texas. Volume II contains appendices of US Geological Survey, Environmental Protection Agency, Coast Guard, Corps of Engineers, the Coastal Zone Management Act, and Alaska. The major causes of delay in the regulatory process governing exploration was summarized in four broad categories: (1) the long and tedious process associated with the Environmental Protection Agency's implementation of the National Pollutant Discharge Elimination System Permit; (2) thelack of mandated time periods for the completion of individual activities in the permitting process; (3) the lack of overall coordination of OCS exploratory regulation; and (4) the inexperience of states, the Federal government and industry relating to the appropriate level of regulation for first-time lease sale areas.

Not Available

1980-11-01T23:59:59.000Z

55

American Power: Order (2010-CE-0911) | Department of Energy  

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

Power: Order (2010-CE-0911) American Power: Order (2010-CE-0911) October 5, 2010 DOE issued an Order and entered into a Compromise Agreement with American Power Solutions, Inc....

56

Offshore Code Comparison Collaboration (OC3) for IEA Wind Task 23 Offshore Wind Technology and Deployment  

SciTech Connect (OSTI)

This final report for IEA Wind Task 23, Offshore Wind Energy Technology and Deployment, is made up of two separate reports, Subtask 1: Experience with Critical Deployment Issues and Subtask 2: Offshore Code Comparison Collaborative (OC3). Subtask 1 discusses ecological issues and regulation, electrical system integration, external conditions, and key conclusions for Subtask 1. Subtask 2 included here, is the larger of the two volumes and contains five chapters that cover background information and objectives of Subtask 2 and results from each of the four phases of the project.

Jonkman, J.; Musial, W.

2010-12-01T23:59:59.000Z

57

rtino is prof of Cyber Ce  

E-Print Network [OSTI]

Program Technolo Worksho Bertino is Compute systems Compute to secure rtino is prof of Cyber Ce internatio Database Indexing Intelligen Services the Very on the e Security& on Web, Program VLDB, A Data Eng distributed fessor of Co enter and R nce and Se mputer Scien EC laborator maden) in S ers Universi arch

Holland, Jeffrey

58

CeBiTec Symposium Molecular Biotechnology  

E-Print Network [OSTI]

F), Bielefeld University April 3 ­ 4, 2014 PROGRAMME Thursday, April 3rd, 2014 11:00 Registration / Snacks 12:00 Opening remarks Volker F. Wendisch, Bielefeld University, Germany Welcome addresses Martin Egelhaaf (Vice.N. (University of Paderborn) Introduction to the CeBiTec Thomas Noll, Bielefeld University, Germany Session I

Moeller, Ralf

59

CE 473/573 Groundwater Course information  

E-Print Network [OSTI]

. Groundwater modeling 4.1. Introduction to finite-difference models 4.2. Models of groundwater flow 4.3. ModelsCE 473/573 Groundwater Fall 2011 Course information Instructor: Prof. Chris Rehmann rehmann of water and contaminants in groundwater systems to solve problems of groundwater resource evaluation

Rehmann, Chris

60

CE 473/573 Groundwater Course information  

E-Print Network [OSTI]

-reactive and reactive contaminants 4. Groundwater modeling 4.1. Introduction to finite-difference models 4.2. Models of groundwater flow 4.3. Models of contaminant transport 4.4. Available models #12;Recommended textbooks FetterCE 473/573 Groundwater Fall 2009 Course information Instructor: Prof. Chris Rehmann rehmann

Rehmann, Chris

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


61

N E U RO S C I E N C E Watchful Waking  

E-Print Network [OSTI]

1603 N E U RO S C I E N C E Watchful Waking Sleep is traditionally thought to consist of two states; the printed sections that had been exposed to pH 7 water became ionized and did not react on heating

Wilf, Peter

62

Computer Engineering Department, "Lucian Blaga" University of Sibiu, Romania http://csac.ulbsibiu.ro/  

E-Print Network [OSTI]

Computer Engineering Department, "Lucian Blaga" University of Sibiu, Romania http" University of Sibiu (LBUS), Romania Academy of Technical Sciences of Romania #12;22 Computer Engineering Department, "Lucian Blaga" University of Sibiu, Romania http://csac.ulbsibiu.ro/ The LBUS Advanced Computer

Vintan, Lucian N.

63

Structural studies of the Ro ribonucleoprotein and the metalloregulator CsoR  

E-Print Network [OSTI]

preference for binding misfolded non-coding RNAs such as pre5S ribosomal RNAs and U2 small-nuclear RNAs besides binding cytoplasmic RNAs called Y RNAs. Although well characterized in eukaryotes, an understanding of Ro in prokaryotes is lacking. To gain...

Ramesh, Arati

2009-05-15T23:59:59.000Z

64

RoBOT: "Rocks Beneath Our Toes" An experiential learning opportunity in mineralogy and geochemistry  

E-Print Network [OSTI]

RoBOT: "Rocks Beneath Our Toes" An experiential learning opportunity in mineralogy with Boston University undergraduates to analyze the mineralogy and unravel the unique story that each rock into modern scientific methods of geochemistry and mineralogy and to unlock for them the exciting

Baxter, Ethan F.

65

SPRING 2013 CEE COURSES: v7 rev: 11/08/12 TRANSPORTATION PLANNING as CE 4410 & CE 6410  

E-Print Network [OSTI]

options for urban transport. After a student registers for CE 4410 or CE WATER MARKETS with Brian Richter and Professor Culver as CE 6500 The utility. This project course will enable us to identify what works best, and how to avoid

Acton, Scott

66

Anchoring Sites for Initial Au Nucleation on CeO2{111}: O Vacancy versus Ce Vacancy Changjun Zhang,  

E-Print Network [OSTI]

Anchoring Sites for Initial Au Nucleation on CeO2{111}: O Vacancy versus Ce Vacancy Changjun Zhang is a matter of debate. Both oxygen and cerium vacancies have been suggested as the anchoring sites initio thermodynamics approaches to investigate the formation of various vacancies at a CeO2{111} surface

Alavi, Ali

67

An inverse scheme for sensitivity and uncertainty analysis in basin modeling: the resolution limits of Easy%Ro  

E-Print Network [OSTI]

sedimentary basin. Of the latter, the chemical kinetic model Easy%Ro (Sweeney and Burnham, 1990) is widely used and has a firm foundation in laboratory experiments and calibration. The Easy%Ro model calculates the systematic variation of vitrinite reflectance...

Huvaz, Ozkan

2000-01-01T23:59:59.000Z

68

CoRoT observations of O stars: diverse origins of variability  

E-Print Network [OSTI]

Six O-type stars were observed continuously by the CoRoT satellite during a 34.3-day run. The unprecedented quality of the data allows us to detect even low-amplitude stellar pulsations in some of these stars (HD 46202 and the binaries HD 46149 and Plaskett's star). These cover both opacity-driven modes and solar-like stochastic oscillations, both of importance to the asteroseismological modelling of O stars. Additional effects can be seen in the CoRoT light curves, such as binarity and rotational modulation. Some of the hottest O-type stars (HD 46223, HD 46150 and HD 46966) are dominated by the presence of red-noise: we speculate that this is related to a sub-surface convection zone.

Blomme, R; Degroote, P; Mahy, L; Aerts, C; Cuypers, J; Godart, M; Gosset, E; Hareter, M; Montalban, J; Morel, T; Nieva, M F; Noels, A; Oreiro, R; Poretti, E; Przybilla, N; Rainer, M; Rauw, G; Schiller, F; Simon-Diaz, S; Smolders, K; Ventura, P; Vuckovic, M; Auvergne, M; Baglin, A; Baudin, F; Catala, C; Michel, E; Samadi, R

2011-01-01T23:59:59.000Z

69

The CoRoT Evolution and Seismic Tools Activity: Goals and Tasks  

E-Print Network [OSTI]

The forthcoming data expected from space missions such as CoRoT require the capacity of the available tools to provide accurate models whose numerical precision is well above the expected observational errors. In order to secure that these tools meet the specifications, a team has been established to test and, when necessary, to improve the codes available in the community. The CoRoT evolution and seismic tool activity (ESTA) has been set up with this mission. Several groups have been involved. The present paper describes the motivation and the organisation of this activity, providing the context and the basis for the presentation of the results that have been achieved so far. This is not a finished task as future even better data will continue to demand more precise and complete tools for asteroseismology.

Lebreton, Y; Montalban, J; Moya, A; Baglin, A; Christensen-Dalsgaard, J; Goupil, M J; Michel, E; Provost, J; Roxburgh, I W; Scuflaire, R

2008-01-01T23:59:59.000Z

70

On the ro-vibrational energies for the lithium dimer; maximum-possible rotational levels  

E-Print Network [OSTI]

The Deng-Fan potential is used to discuss the reliability of the improved Greene-Aldrich approximation and the factorization recipe of Badawi et al.'s [17] for the central attractive/repulsive core. The factorization recipe is shown to be a more reliable approximation and is used to obtain the ro-vibrational energies for the lithium dimer. For each vibrational state only a limited number of the rotational levels are found to be supported by the lithium dimer.

Omar Mustafa

2015-03-02T23:59:59.000Z

71

On the ro-vibrational energies for the lithium dimer; maximum-possible rotational levels  

E-Print Network [OSTI]

The Deng-Fan potential is used to discuss the reliability of the improved Greene-Aldrich approximation and the factorization recipe of Badawi et al.'s [17] for the central attractive/repulsive core. The factorization recipe is shown to be a more reliable approximation and is used to obtain the ro-vibrational energies for the lithium dimer. For each vibrational state only a limited number of the rotational levels are found to be supported by the lithium dimer.

Omar Mustafa

2015-01-27T23:59:59.000Z

72

THE FUTURE OF THE SUN: AN EVOLVED SOLAR TWIN REVEALED BY CoRoT  

SciTech Connect (OSTI)

The question of whether the Sun is peculiar within the class of solar-type stars has been the subject of active investigation over the past three decades. Although several solar twins have been found with stellar parameters similar to those of the Sun (albeit in a range of Li abundances and with somewhat different compositions), their rotation periods are unknown, except for 18 Sco, which is younger than the Sun and with a rotation period shorter than solar. It is difficult to obtain rotation periods for stars of solar age from ground-based observations, as a low-activity level implies a shallow rotational modulation of their light curves. CoRoT has provided space-based long time series from which the rotation periods of solar twins as old as the Sun could be estimated. Based on high-signal-to-noise, high-resolution spectroscopic observations gathered at the Subaru Telescope, we show that the star CoRoT ID 102684698 is a somewhat evolved solar twin with a low Li abundance. Its rotation period is 29 {+-} 5 days, compatible with its age (6.7 Gyr) and low lithium content, A{sub Li} {approx}< 0.85 dex. Interestingly, our CoRoT solar twin seems to have enhanced abundances of the refractory elements with respect to the Sun, a typical characteristic of most nearby twins. With a magnitude V {approx_equal} 14.1, ID 102684698 is the first solar twin revealed by CoRoT, the farthest field solar twin so far known, and the only solar twin older than the Sun for which a rotation period has been determined.

Do Nascimento, J.-D. Jr.; Da Costa, J. S.; Castro, M. [Departamento de Fisica Teorica e Experimental (DFTE), Universidade Federal do Rio Grande do Norte (UFRN), CP 1641, 59072-970 Natal, RN (Brazil); Takeda, Y. [National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 (Japan); Melendez, J. [Departamento de Astronomia do IAG/USP, Universidade de Sao Paulo, Rua do Matao 1226, 05508-900 Sao Paulo, SP (Brazil); Porto de Mello, G. F., E-mail: dias@dfte.ufrn.br [Observatrio do Valongo, UFRJ, Ladeira do Pedro Antonio 43, 20080-090 Rio de Janeiro, RJ (Brazil)

2013-07-10T23:59:59.000Z

73

Surface structure of the CoRoT CP2 target star HD 50773  

E-Print Network [OSTI]

We compare surface maps of the chemically peculiar star HD 50773 produced with a Bayesian technique and based on high quality CoRoT photometry with those derived from rotation phase resolved spectropolarimetry. The goal is to investigate the correlation of surface brightness with surface chemical abundance distribution and the stellar magnetic field. The rotational period of the star was determined from a nearly 60 day long continuous light curve obtained during the initial run of CoRoT. Using a Bayesian approach to star-spot modelling, which in this work is applied for the first time for the photometric mapping of a CP star, we derived longitudes, latitudes and radii of four different spot areas. Additional parameters like stellar inclination and the spot's intensities were also determined. The CoRoT observations triggered an extensive ground-based spectroscopic and spectropolarimetric observing campaign and enabled us to obtain 19 different high resolution spectra in Stokes parameters I and V with NARVAL, E...

Lftinger, T; Weiss, W; Petit, P; Aurire, M; Nesvacil, N; Gruberbauer, M; Shulyak, D; Alecian, E; Baglin, A; Baudin, F; Catala, C; Donati, J -F; Kochukhov, O; Michel, E; Piskunov, N; Roudier, T; Samadi, R

2009-01-01T23:59:59.000Z

74

HD 50844: the new look of Delta Sct stars from CoRoT space photometry  

E-Print Network [OSTI]

It has also been suggested that the detection of a wealth of very low amplitude modes in Delta Sct stars was only a matter of signal--to--noise ratio. Access to this treasure, impossible from the ground, is one of the scientific aims of the space mission CoRoT, a space mission developed and operated by CNES. This work presents the results obtained on HD 50844: the 140,016 datapoints were analysed using independent approaches and several checks performed. A level of 10^{-5} mag was reached in the amplitude spectra of the CoRoT timeseries. The frequency analysis of the CoRoT timeseries revealed hundreds of terms in the frequency range 0--30 d^{-1}. All the cross--checks confirmed this new result. The initial guess that Delta Sct stars have a very rich frequency content is confirmed. The spectroscopic mode identification gives theoretical support since very high--degree modes (up to ell=14) are identified. We also prove that cancellation effects are not sufficient in removing the flux variations associated to th...

Poretti, E; Garrido, R; Lefvre, L; Mantegazza, L; Rainer, M; Rodrguez, E; Uytterhoeven, K; Amado, P J; Martin-Ruiz, S; Moya, A; Niemczura, E; Surez, J C; Zima, W; Baglin, A; Auvergne, M; Baudin, F; Catala, C; Samadi, R; Alvarez, M; Mathias, P; Paparo, M; Papics, P; Plachy, E

2009-01-01T23:59:59.000Z

75

Elastic constants and tensile properties of Al2OC by density functional calculations * X. F. Zhang,1, L. C. De Jonghe,1,2 and R. O. Ritchie1,2  

E-Print Network [OSTI]

Elastic constants and tensile properties of Al2OC by density functional calculations R. Yu,1, * X received 17 January 2007; published 26 March 2007 Al2OC is a compound that forms as a nanoscale grain properties of Al2OC are determined from first-principles calculations. The crystal structure of Al2OC

Ritchie, Robert

76

Transiting exoplanets from the CoRoT space mission XXVIII. CoRoT-28b, a planet orbiting an evolved star, and CoRoT-29b, a planet showing an asymmetric transit  

E-Print Network [OSTI]

Context. We present the discovery of two transiting extrasolar planets by the satellite CoRoT. Aims. We aim at a characterization of the planetary bulk parameters, which allow us to further investigate the formation and evolution of the planetary systems and the main properties of the host stars. Methods. We used the transit light curve to characterize the planetary parameters relative to the stellar parameters. The analysis of HARPS spectra established the planetary nature of the detections, providing their masses. Further photometric and spectroscopic ground-based observations provided stellar parameters (log g,Teff,v sin i) to characterize the host stars. Our model takes the geometry of the transit to constrain the stellar density into account, which when linked to stellar evolutionary models, determines the bulk parameters of the star. Because of the asymmetric shape of the light curve of one of the planets, we had to include the possibility in our model that the stellar surface was not strictly spherical...

Cabrera, J; Montagnier, G; Fridlund, M; Eiff, M Ammler-von; Chaintreuil, S; Damiani, C; Deleuil, M; Ferraz-Mello, S; Ferrigno, A; Gandolfi, D; Guillot, T; Guenther, E W; Hatzes, A; Hbrard, G; Klagyivik, P; Parviainen, H; Pasternacki, Th; Ptzold, M; Sebastian, D; Santos, M Tadeu dos; Wuchterl, G; Aigrain, S; Alonso, R; Almenara, J -M; Armstrong, J D; Auvergne, M; Baglin, A; Barge, P; Barros, S C C; Bonomo, A S; Bord, P; Bouchy, F; Carpano, S; Chaffey, C; Deeg, H J; Daz, R F; Dvorak, R; Erikson, A; Grziwa, S; Korth, J; Lammer, H; Lindsay, C; Mazeh, T; Moutou, C; Ofir, A; Ollivier, M; Pall, E; Rauer, H; Rouan, D; Samuel, B; Santerne, A; Schneider, J

2015-01-01T23:59:59.000Z

77

CeCap LLP | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating SolarElectricEnergyCTBarreis aCallahanWindSyracuse, NY JumpKS"Cayucos,CeCap LLP

78

Cross-functional environmental initiatives : addressing Restriction of Hazardous Substance (RoHS) technical challenges at Sun Microsystems  

E-Print Network [OSTI]

The European Union (EU) passed the Restriction of Hazardous Substances (RoHS) Directive, effective January 2006, banning the sale of electronics equipment containing lead and five other hazardous substances into EU countries. ...

Greenlaw, Tamara

2005-01-01T23:59:59.000Z

79

CIVIL ENGINEERING Prerequisite Summary Note: BSCE candidate means that you have been admitted to upper division. CE enrolled means you are listed with  

E-Print Network [OSTI]

, Math 3280 (conc), BSCE cand. CE 3316 Transportation Engineering BSCE cand. CE 3426 Soil Mechanics CE & Engineering Drawing CE 2017, BSCE cand. CE 3016 Surveying Math 1297, BSCE cand. CE 3025 Environmental Engineering Chem 1151 or 1153 and 1154, CE 3221, BSCE cand. CE 3026 Project Management BSCE cand. CE 3027

Levinson, David M.

80

The universal red-giant oscillation pattern; an automated determination with CoRoT data  

E-Print Network [OSTI]

The CoRoT and Kepler satellites have provided thousands of red-giant oscillation spectra. The analysis of these spectra requires efficient methods for identifying all eigenmode parameters. The assumption of new scaling laws allows us to construct a theoretical oscillation pattern. We then obtain a highly precise determination of the large separation by correlating the observed patterns with this reference. We demonstrate that this pattern is universal and are able to unambiguously assign the eigenmode radial orders and angular degrees. This solves one of the current outstanding problems of asteroseismology hence allowing precise theoretical investigation of red-giant interiors.

Mosser, B; Goupil, M J; Michel, E; Elsworth, Y; Barban, C; Kallinger, T; Hekker, S; DeRidder, J; Samadi, R; Baudin, F; Pinheiro, F J G; Auvergne, M; Baglin, A; Catala, C

2010-01-01T23:59:59.000Z

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


81

SPD/DPS Joint Operational Procedures Jorrur SrnonRo OpenATrNG Pnoceoune  

E-Print Network [OSTI]

Sue¡ect: SPD/DPS Joint Operational Procedures Jorrur Srn¡¡onRo OpenATrNG Pnoceoune sPD - SOP 2011: The purpose of this policy is to establish a joint operational protocol that will serve as a reference.2.1 12.1.4 1.2.5. 1.2.6 61.2.1.61.2.1 Page I of I SPD SOP 2011-02 / DPS SOP 2011-50 SPD/DPS Joint

Mather, Patrick T.

82

Mixed modes in red-giant stars observed with CoRoT  

E-Print Network [OSTI]

The CoRoT mission has provided thousands of red-giant light curves. The analysis of their solar-like oscillations allows us to characterize their stellar properties. Up to now, the global seismic parameters of the pressure modes remain unable to distinguish red-clump giants from members of the red-giant branch. As recently done with Kepler red giants, we intend to analyze and use the so-called mixed modes to determine the evolutionary status of the red giants observed with CoRoT. We also aim at deriving different seismic characteristics depending on evolution. The complete identification of the pressure eigenmodes provided by the red-giant universal oscillation pattern allows us to aim at the mixed modes surrounding the l=1 expected eigenfrequencies. A dedicated method based on the envelope autocorrelation function is proposed to analyze their period separation. We have identified the mixed-mode signature separation thanks to their pattern compatible with the asymptotic law of gravity modes. We have shown tha...

Mosser, B; Montalb, J; Beck, P G; Miglio, A; Belkacem, K; Goupil, M J; Hekker, S; De Ridder, J; Dupret, M A; Elsworth, Y; Noels, A; Baudin, F; Michel, E; Samadi, R; Auvergne, M; Baglin, A; Catala, C

2011-01-01T23:59:59.000Z

83

The solar-like CoRoT target HD 170987: spectroscopic and seismic observations  

E-Print Network [OSTI]

The CoRoT mission is in its third year of observation and the data from the second long run in the galactic centre direction are being analysed. The solar-like oscillating stars that have been observed up to now have given some interesting results, specially concerning the amplitudes that are lower than predicted. We present here the results from the analysis of the star HD 170987.The goal of this research work is to characterise the global parameters of HD 170987. We look for global seismic parameters such as the mean large separation, maximum amplitude of the modes, and surface rotation because the signal-to-noise ratio in the observations do not allow us to measure individual modes. We also want to retrieve the stellar parameters of the star and its chemical composition.We have studied the chemical composition of the star using ground-based observations performed with the NARVAL spectrograph. We have used several methods to calculate the global parameters from the acoustic oscillations based on CoRoT data....

Mathur, S; Catala, C; Bruntt, H; Mosser, B; Appourchaux, T; Ballot, J; Creevey, O L; Gaulme, P; Hekker, S; Huber, D; Karoff, C; Piau, L; Regulo, C; Roxburgh, I W; Salabert, D; Verner, G A; Auvergne, M; Baglin, A; Chaplin, W J; Elsworth, Y; Michel, E; Samadi, R; Sato, K; Stello, D

2010-01-01T23:59:59.000Z

84

Pulsations in the late-type Be star HD 50209 detected by CoRoT  

E-Print Network [OSTI]

The presence of pulsations in late-type Be stars is still a matter of controversy. It constitutes an important issue to establish the relationship between non-radial pulsations and the mass-loss mechanism in Be stars. To contribute to this discussion, we analyse the photometric time series of the B8IVe star HD 50209 observed by the CoRoT mission in the seismology field. We use standard Fourier techniques and linear and non-linear least squares fitting methods to analyse the CoRoT light curve. In addition, we applied detailed modelling of high-resolution spectra to obtain the fundamental physical parameters of the star. We have found four frequencies which correspond to gravity modes with azimuthal order m=0,-1,-2,-3 with the same pulsational frequency in the co-rotating frame. We also found a rotational period with a frequency of 0.679 \\cd (7.754 $\\mu$Hz). HD 50209 is a pulsating Be star as expected from its position in the HR diagram, close to the SPB instability strip.

Diago, P D; Auvergne, M; Fabregat, J; Hubert, A -M; Floquet, M; Frmat, Y; Garrido, R; Andrade, L; De Batz, B; Emilio, M; Espinosa-Lara, F; Huat, A -L; Janot-Pacheco, E; Leroy, B; Martayan, C; Neiner, C; Semaan, T; Suso, J; Catala, C; Poretti, E; Rainer, M; Uytterhoeven, K; Michel, E; Samadi, R

2009-01-01T23:59:59.000Z

85

Universitt Bielefeld Centrum fr Biotechnologie -CeBiTec  

E-Print Network [OSTI]

for the development of algal biotechnology Center for Interdisciplinary Research (ZiF), Bielefeld University, Germany September 21 ­ 24, 2014 The Center for Biotechnology (CeBiTec) of Bielefeld University cordially invites you include The 2014 International CeBiTec Research Conference aims to give a complete overview

Moeller, Ralf

86

HD 174884: a strongly eccentric, short-period early-type binary system discovered by CoRoT  

E-Print Network [OSTI]

Accurate photometric CoRoT space observations of a secondary seismological target, HD 174884, led to the discovery that this star is an astrophysically important double-lined eclipsing spectroscopic binary in an eccentric orbit (e of about 0.3), unusual for its short (3.65705d) orbital period. The high eccentricity, coupled with the orientation of the binary orbit in space, explains the very unusual observed light curve with strongly unequal primary and secondary eclipses having the depth ratio of 1-to-100 in the CoRoT 'seismo' passband. Without the high accuracy of the CoRoT photometry, the secondary eclipse, 1.5 mmag deep, would have gone unnoticed. A spectroscopic follow-up program provided 45 high dispersion spectra. The analysis of the CoRoT light curve was performed with an adapted version of PHOEBE that supports CoRoT passbands. The final solution was obtained by simultaneous fitting of the light and the radial velocity curves. Individual star spectra were derived by spectrum disentangling. The uncerta...

Maceroni, C; Michel, E; Harmanec, P; Prsa, A; Briquet, M; Niemczura, E; Morel, T; Ladjal, D; Auvergne, M; Baglin, A; Baudin, F; Catala, C; Samadi, R; Aerts, C

2009-01-01T23:59:59.000Z

87

A new deformed Schioberg-type potential and ro-vibrational energies for some diatomic molecules  

E-Print Network [OSTI]

We suggest a new deformed Schioberg-type potential for diatomic molecules. We show that it is equivalent to Tietz-Hua oscillator potential. We discuss how to relate our deformed Schioberg potential to Morse, to Deng-Fan, to the improved Manning-Rosen, and to the deformed modified Rosen-Morse potential models. We transform our potential into a proper form and use the supersymmetric quantization to find a closed form analytical solution for the ro-vibrational energy levels that are highly accurate over a wide range of vibrational and rotational quantum numbers. We discuss our results using 6-diatomic molecules H2, HF, N2, NO, O2, and O2. Our results turn out to compare excellently with those from a generalized pseudospectral numerical method.

Omar Mustafa

2014-09-24T23:59:59.000Z

88

Asteroseismic analysis of the CoRoT target HD 169392  

E-Print Network [OSTI]

The satellite CoRoT (Convection, Rotation, and planetary Transits) has provided high-quality data for almost six years. We show here the asteroseismic analysis and modeling of HD169392A, which belongs to a binary system weakly gravitationally bound as the distance between the two components is of 4250 AU. The main component, HD169392A, is a G0IV star with a magnitude of 7.50 while the second component is a G0V-G2IV star with a magnitude of 8.98. This analysis focuses on the main component, as the secondary one is too faint to measure any seismic parameters. A complete modeling has been possible thanks to the complementary spectroscopic observations from HARPS, providing Teff=5985+/-60K, log g=3.96+/-0.07, and [Fe/H]=- 0.04+/-0.10.

Mathur, S; Catala, C; Benomar, O; Davies, G R; Garcia, R A; Salabert, D; Ballot, J; Mosser, B; Regulo, C; Chaplin, W J; Elsworth, Y; Handberg, R; Hekker, S; Mantegazza, L; Michel, E; Poretti, E; Rainer, M; Roxburgh, I W; Samadi, R; Steslicki, M; Uytterhoeven, K; Verner, G A; Auvergne, M; Baglin, A; Forteza, S Barcelo; Baudin, F; Cortes, T Roca

2013-01-01T23:59:59.000Z

89

Asteroseismic analysis of the CoRoT \\delta-Scuti star HD174936  

E-Print Network [OSTI]

We present an analysis of the \\delta-Scuti star object HD 174936 (ID 7613) observed by CoRoT during the first short run SRc01 (27 days). A total number of 422 frequencies we are extracted from the light curve using standard prewhitening techniques. This number of frequencies was obtained by considering a spectral significance limit of sig = 10 using the software package SigSpec. Our analysis of the oscillation frequency spectrum reveals a spacing periodicity of around 52 \\muHz. Although modes considered here are not in the asymptotic regime, a comparison with stellar models confirms that this signature may stem from a quasi-periodic pattern similar to the so-called large separation in solar-like stars.

Hernndez, A Garca; Michel, E; Garrido, R; Surez, J C; Rodrguez, E; Amado, P J; Martn-Ruz, S; Rolland, A; Poretti, E; Samadi, R; Baglin, A; Auvergne, M; Catala, C; Lefvre, L; Baudin, F

2009-01-01T23:59:59.000Z

90

The CoRoT primary target HD 52265: models and seismic tests  

E-Print Network [OSTI]

HD 52265 is the only known exoplanet-host star selected as a main target for the seismology programme of the CoRoT satellite. As such, it will be observed continuously during five months, which is of particular interest in the framework of planetary systems studies. This star was misclassified as a giant in the Bright Star Catalog, while it is more probably on the main-sequence or at the beginning of the subgiant branch. We performed an extensive analysis of this star, showing how asteroseismology may lead to a precise determination of its external parameters and internal structure. We first reviewed the observational constraints on the metallicity, the gravity and the effective temperature derived from the spectroscopic observations of HD 52265. We also derived its luminosity using the Hipparcos parallax. We computed the evolutionary tracks for models of various metallicities which cross the relevant observational error boxes in the gravity-effective temperature plane. We selected eight different stellar models which satisfy the observational constraints, computed their p-modes frequencies and analysed specific seismic tests. The possible models for HD 52265, which satisfy the constraints derived from the spectroscopic observations, are different in both their external and internal parameters. They lie either on the main sequence or at the beginning of the subgiant branch. The differences in the models lead to quite different properties of their oscillation frequencies. We give evidences of an interesting specific behaviour of these frequencies in case of helium-rich cores: the ``small separations'' may become negative and give constraints on the size of the core. We expect that the observations of this star by the CoRoT satellite wi ll allow choosing between these possible models.

M. Soriano; S. Vauclair; C. Vauclair; M. Laymand

2007-05-17T23:59:59.000Z

91

Synthesis and structure of nanocrystalline mixed CeYb silicates  

SciTech Connect (OSTI)

Graphical abstract: - Highlights: New method of synthesis of nanocrystalline mixed lanthanide silicates is proposed. Formation of A-type (Ce{sub 1?y}Yb{sub y}){sub 2}Si{sub 2}O{sub 7} in well dispersed Ce{sub 1?x}Yb{sub x}O{sub 2?(x/2)}SiO{sub 2} system. Formation of Yb{sub y}Ce{sub 9.33?y}(SiO{sub 4}){sub 6}O{sub 2} in agglomerated Ce{sub 1?x}Yb{sub x}O{sub 2?(x/2)}SiO{sub 2} system. - Abstract: This work presents results of studies on synthesis and structure of mixed, nanocrystalline CeYb silicates. Using TEM, XRD and FTIR we showed that heat treatment of nanocrystalline Ce{sub 1?x}Yb{sub x}O{sub 2?(x/2)} (x = 0.3, 0.5) mixed oxide supported on amorphous silica in reducing atmosphere, results in formation of CeYb mixed silicates. Dispersion of the oxide on the silica surface and thus a local lanthanide/Si atomic ratio determines the stoichiometry of the silicate. Oxide crystallites uniformly dispersed on the silica surface transformed into A-(Ce{sub 1?y}Yb{sub y}){sub 2}Si{sub 2}O{sub 7} disilicate, while the agglomerated nanoparticles converted into Yb{sub y}Ce{sub 9.33?y}(SiO{sub 4}){sub 6}O{sub 2} oxyapatite silicate as an intermediate phase.

Ma?ecka, Ma?gorzata A., E-mail: M.Malecka@int.pan.wroc.pl; K?pi?ski, Leszek

2013-07-15T23:59:59.000Z

92

Comparacin de sedimentos descargados en el Delta del Ro Mississippi durante el ao 2006, utilizando imgenes del sensor MODIS  

E-Print Network [OSTI]

los de mayor impacto ambiental en cuanto a descarga de sedimentos y nutrientes se refiere, en la impacto hoy día utilizándose para el estudio de la atmósfera, la tierra y el océano. Este trabajo se

Gilbes, Fernando

93

Efficacy of an integrated continuing medical education (CME) and quality improvement (QI) program on radiation oncologist (RO) clinical practice  

SciTech Connect (OSTI)

Purpose: There has been little radiation oncologist (RO)-specific research in continuing medical education (CME) or quality improvement (QI) program efficacy. Our aim was to evaluate a CME/QI program for changes in RO behavior, performance, and adherence to department protocols/studies over the first 12 months of the program. Methods and Materials: The CME/QI program combined chart audit with feedback (C-AWF), simulation review AWF (SR-AWF), reminder checklists, and targeted CME tutorials. Between April 2003 and March 2004, management of 75 patients was evaluated by chart audit with feedback (C-AWF) and 178 patients via simulation review audit (SR-AWF) using a validated instrument. Scores were presented, and case management was discussed with individualized educational feedback. RO behavior and performance was compared over the first year of the program. Results: Comparing the first and second 6 months, there was a significant improvement in mean behavior (12.7-13.6 of 14, p = 0.0005) and RO performance (7.6-7.9 of 8, p = 0.018) scores. Protocol/study adherence significantly improved from 90.3% to 96.6% (p = 0.005). A total of 50 actions were generated, including the identification of learning needs to direct CME tutorials, the systematic change of suboptimal RO practice, and the alteration of deficient management of 3% of patients audited during the program. Conclusion: An integrated CME/QI program combining C-AWF, SR-AWF, QI reminders, and targeted CME tutorials effectively improved targeted RO behavior and performance over a 12-month period. There was a corresponding increase in departmental protocol and study adherence.

Leong, Cheng Nang [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore) and Department of Radiation Oncology, Cancer Institute, Tan Tock Seng Hospital (Singapore)]. E-mail: Cheng_Nang_Leong@mail.nhg.com.sg; Shakespeare, Thomas Philip [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore); North Coast Cancer Institute, Coffs Harbour (Australia); Mukherjee, Rahul K. [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore); Department of Radiation Oncology, Cancer Institute, Tan Tock Seng Hospital (Singapore); Back, Michael F. [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore); Department of Radiation Oncology, Cancer Institute, Tan Tock Seng Hospital (Singapore); Lee, Khai Mun [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore); Department of Radiation Oncology, Cancer Institute, Tan Tock Seng Hospital (Singapore); Lu, Jiade Jay [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore); Department of Radiation Oncology, Cancer Institute, Tan Tock Seng Hospital (Singapore); Wynne, Christopher J. [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore); Lim, Keith [Department of Radiation Oncology, The Cancer Institute, National University Hospital (Singapore); Tang, Johann [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore); Department of Radiation Oncology, Cancer Institute, Tan Tock Seng Hospital (Singapore); Zhang Xiaojian [Department of Radiation Oncology, Cancer Hospital, Fudan Hospital, Shanghai (China)

2006-12-01T23:59:59.000Z

94

Ferromagnetism in chemically synthesized CeO2 nanoparticles by...  

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

by Ni doping. Ferromagnetism in chemically synthesized CeO2 nanoparticles by Ni doping. Abstract: This work reports the discovery of room-temperature ferromagnetism in 5 - 9 nm...

95

Role of dopant incorporation on the magnetic properties of Ce1-xNixO2 nanoparticles: An electron paramagnetic resonance study  

SciTech Connect (OSTI)

Nickel doping has been found to produce weak room-temperature ferromagnetism in CeO2 [1]. The saturation magnetization of the chemically synthesized Ce1-xNixO2 samples showed a maximum for x = 0.04, above which the magnetization decreased gradually. For Ce1-xNixO2 samples with x ? 0.04, an activation process involving slow annealing of the sample to 500 oC increased the saturation magnetization by more than two orders of magnitude [1]. However, no such activation effect was observed in samples with x < 0.04. Electron paramagnetic resonance (EPR), a sensitive technique to investigate the ionic states and local environments and interactions, has been used here in this work to investigate (i) why the ferromagnetic behavior gradually weakened and disappeared for x > 0.04 and (ii)_what causes the saturation magnetization to dramatically increase in the activated Ce1-xNixO2 samples with x ? 0.04 and why this process is absent in samples with x < 0.04. Our X-band (~9.4 GHz) EPR experiments and detailed simulation analysis on several as-prepared Ce1-xNixO2 samples with 0.01 ? x ? 0.10 at 5 K and 300 K indicate the presence of two magnetically inequivalent Ni2+ ions with the ionic spin of 1, one Ce3+ ion with spin , and three O2-. Spectra of samples with x < 0.04 are dominated by a single Ni2+ EPR line ascribed to dopant ions in substitutional sites whereas in samples with x ? 0.04, an additional signal attributed to Ni2+ ions in interstitial sites is also present. In the activated sample, the EPR line due to the interstitial Ni2+ is completely absent and only the lines due to substituional Ni2+ ions are present suggesting that the enhanced ferromagnetism results from conversion of interstitial Ni2+ ions to substitutional sites.

Misra, S. K.; Andronenko, S. I.; Engelhard, Mark H.; Thurber, Aaron P.; Reddy, K. M.; Punnoose, Alex

2008-04-01T23:59:59.000Z

96

3/30/2014 Morile de vnt minuscule care ncarc bateria telefonului mobil | Solar-Magazin.ro http://www.solar-magazin.ro/cercetare/inventii-solare/incarcarea-bateriilor-telefoanelor-mobile-cu-mori-de-vant-minuscule.html 1/2  

E-Print Network [OSTI]

DESPRE NOI PUBLICITATE CONTACT Cost Of Solar Panel nextag.com/Home-and-Garden Tons of Home and Garden Items. Cost Of Solar Panel on Sale! One person likes this. Sign Up to see w hat your friends like3/30/2014 Morile de vânt minuscule care încarc bateria telefonului mobil | Solar-Magazin.ro http

Chiao, Jung-Chih

97

Ca2+-Doped CeBr3 Scintillating Materials  

SciTech Connect (OSTI)

Despite the outstanding scintillation performance characteristics of cerium tribromide (CeBr3) and cerium-activated lanthanum tribromide, their commercial availability and application are limited due to the difficulties of growing large, crack-free single crystals from these fragile materials. This investigation employed aliovalent doping to increase crystal strength while maintaining the optical properties of the crystal. One divalent dopant (Ca2+) was used as a dopant to strengthen CeBr3 without negatively impacting scintillation performance. Ingots containing nominal concentrations of 1.9% of the Ca2+ dopant were grown. Preliminary scintillation measurements are presented for this aliovalently doped scintillator. Ca2+-doped CeBr3 exhibited little or no change in the peak fluorescence emission for 371 nm optical excitation for CeBr3. The structural, electronic, and optical properties of CeBr3 crystals were studied using the density functional theory within the generalized gradient approximation. The calculated lattice parameters are in good agreement with the experimental data. The energy band structures and density of states were obtained. The optical properties of CeBr3, including the dielectric function, were calculated.

Guss, Paul [NSTec; Foster, Michael E. [SNL; Wong, Bryan M. [SNL; Doty, F. Patrick [SNL; Shah, Kanai [RMD; Squillante, Michael R. [RMD; Shirwadkar, Urmila [RMD; Hawrami, Rastgo [RMD; Tower, Josh [RMD; Yuan, Ding [NSTec

2014-01-01T23:59:59.000Z

98

Effects of CeO2 Support Facets on VOx/CeO2 Catalysts in Oxidative...  

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

The higher activity for VOxCeO2(110) might be related to the more abundant oxygen vacancies present on the (110) facets, evidenced from Raman spectroscopic measurements....

99

RoBallet: Exploring Learning through Expression in the Arts through Constructing in a Technologically Immersive Environment  

E-Print Network [OSTI]

in a Technologically Immersive Environment David Cavallo, Arnan Sipitakiat, Anindita Basu, Shaundra Bryant, LarissaBallet environment as an interesting area for learning in a variety of domains through augmenting performing arts with technology. In the RoBallet environment children choreograph dance movements while wearing sensors

100

Heating of beam ions by ion acoustic waves A. Vaivads, K. Ro nnmark, T. Oscarsson, and M. Andre  

E-Print Network [OSTI]

spectral density at frequencies much below the ion gyrofrequency. The wave power decreases with increasingHeating of beam ions by ion acoustic waves A. Vaivads, K. Ro? nnmark, T. Oscarsson, and M. Andre? Swedish Institute of Space Physics, University of Umea? , S-901 87 UMEA? , Sweden Received: 30 April 1997

Paris-Sud XI, Université de

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


101

Ro-vibrational excitation of an organic molecule (HCN) in protoplanetary disks  

E-Print Network [OSTI]

(Abridged) Organic molecules are important constituents of protoplanetary disks. Their ro-vibrational lines observed in the near- and mid-infrared are commonly detected toward T Tauri disks. These lines are the only way to probe the chemistry in the inner few au where terrestrial planets form. To understand this chemistry, accurate molecular abundances have to be determined. This is complicated by excitation effects. Most analyses so far have made the assumption of local thermal equilibrium (LTE). Starting from estimates for the collisional rate coefficients of HCN, non-LTE slab models of the HCN emission were calculated to study the importance of different excitation mechanisms. Using a new radiative transfer model, the HCN emission from a full two-dimensional disk was then modeled to study the effect of the non-LTE excitation, together with the line formation. We ran models tailored to the T Tauri disk AS 205 (N) where HCN lines in both the 3 {\\mu}m and 14 {\\mu}m bands have been observed by VLT-CRIRES and t...

Bruderer, Simon; van Dishoeck, Ewine F

2014-01-01T23:59:59.000Z

102

Solar-like oscillations with low amplitude in the CoRoT target HD 181906  

E-Print Network [OSTI]

Context: The F8 star HD 181906 (effective temperature ~6300K) was observed for 156 days by the CoRoT satellite during the first long run in the centre direction. Analysis of the data reveals a spectrum of solar-like acoustic oscillations. However, the faintness of the target (m_v=7.65) means the signal-to-noise (S/N) in the acoustic modes is quite low, and this low S/N leads to complications in the analysis. Aims: To extract global variables of the star as well as key parameters of the p modes observed in the power spectrum of the lightcurve. Methods: The power spectrum of the lightcurve, a wavelet transform and spot fitting have been used to obtain the average rotation rate of the star and its inclination angle. Then, the autocorrelation of the power spectrum and the power spectrum of the power spectrum were used to properly determine the large separation. Finally, estimations of the mode parameters have been done by maximizing the likelihood of a global fit, where several modes were fit simultaneously. Resu...

Garca, R A; Samadi, R; Ballot, J; Barban, C; Benomar, O; Chaplin, W J; Gaulme, P; Appourchaux, T; Mathur, S; Mosser, B; Toutain, T; Verner, G A; Auvergne, M; Baglin, A; Baudin, F; Boumier, P; Bruntt, H; Catala, C; Deheuvels, S; Elsworth, Y; Jimnez-Reyes, S J; Michel, E; Hernandez, F Perez; Roxburgh, I W; Salabert, D

2009-01-01T23:59:59.000Z

103

Non-radial oscillations in the red giant HR7349 measured by CoRoT  

E-Print Network [OSTI]

Convection in red giant stars excites resonant acoustic waves whose frequencies depend on the sound speed inside the star, which in turn depends on the properties of the stellar interior. Therefore, asteroseismology is the most robust available method for probing the internal structure of red giant stars. Solar-like oscillations in the red giant HR7349 are investigated. Our study is based on a time series of 380760 photometric measurements spread over 5 months obtained with the CoRoT satellite. Mode parameters were estimated using maximum likelihood estimation of the power spectrum. The power spectrum of the high-precision time series clearly exhibits several identifiable peaks between 19 and 40 uHz showing regularity with a mean large and small spacing of Dnu = 3.47+-0.12 uHz and dnu_02 = 0.65+-0.10 uHz. Nineteen individual modes are identified with amplitudes in the range from 35 to 115 ppm. The mode damping time is estimated to be 14.7+4.7-2.9 days.

Carrier, F; Baudin, F; Barban, C; Hatzes, A P; Hekker, S; Kallinger, T; Miglio, A; Montalban, J; Morel, T; Weiss, W W; Auvergne, M; Baglin, A; Catala, C; Michel, E; Samadi, R

2010-01-01T23:59:59.000Z

104

Short-lived spots in solar-like stars as observed by CoRoT  

E-Print Network [OSTI]

Context. CoRoT light curves have an unprecedented photometric quality, having simultaneously a high signal-to-noise ratio, a long time span and a nearly continuous duty-cycle. Aims. We analyse the light-curves of four bright targets observed in the seismology field and study short-lived small spots in solar-like stars. Methods. We present a simple spot modeling by iterative analysis. Its ability to extract relevant parameters is ensured by implementing relaxation steps to avoid convergence to local minima of the sum of the residuals between observations and modeling. The use of Monte-Carlo simulations allows us to estimate the performance of the fits. Results. Our starspot modeling gives a representation of the spots on these stars in agreement with other well tested methods. Within this framework, parameters such as rigid-body rotation and spot lifetimes seem to be precisely determined. Then, the lifetime/rotation period ratios are in the range 0.5 - 2, and there is clear evidence for differential rotation.

Mosser, B; Lanza, A F; Hulot, J C; Catala, C; Baglin, A; Auvergne, M

2009-01-01T23:59:59.000Z

105

Modelling a high-mass red giant observed by CoRoT  

E-Print Network [OSTI]

The G6 giant HR\\,2582 (HD\\,50890) was observed by CoRoT for approximately 55 days. Mode frequencies are extracted from the observed Fourier spectrum of the light curve. Numerical stellar models are then computed to determine the characteristics of the star (mass, age, etc...) from the comparison with observational constraints. We provide evidence for the presence of solar-like oscillations at low frequency, between 10 and 20\\,$\\mu$Hz, with a regular spacing of $(1.7\\pm0.1)\\mu$Hz between consecutive radial orders. Only radial modes are clearly visible. From the models compatible with the observational constraints used here, We find that HR\\,2582 (HD\\,50890) is a massive star with a mass in the range (3--\\,5\\,$M_{\\odot}$), clearly above the red clump. It oscillates with rather low radial order ($n$ = 5\\,--\\,12) modes. Its evolutionary stage cannot be determined with precision: the star could be on the ascending red giant branch (hydrogen shell burning) with an age of approximately 155 Myr or in a later phase (h...

Baudin, F; Goupil, M J; Samadi, R; Lebreton, Y; Bruntt, H; Morel, T; Lefvre, L; Michel, E; Mosser, B; Carrier, F; De Ridder, J; Hatzes, A; Hekker, S; Kallinger, T; Auvergne, M; Baglin, A; Catala, C

2011-01-01T23:59:59.000Z

106

Plaskett's Star: Analysis of the CoRoT photometric data  

E-Print Network [OSTI]

The SRa02 of the CoRoT space mission for Asteroseismology was partly devoted to stars belonging to the Mon OB2 association. An intense monitoring was performed on Plaskett's Star (HD47129) and the unprecedented quality of the light curve allows us to shed new light on this very massive, non-eclipsing binary system. We particularly aimed at detecting periodic variability which might be associated with pulsations or interactions between both components. We also searched for variations related to the orbital cycle which could help to constrain the inclination and the morphology of the binary system. A Fourier-based prewhitening and a multiperiodic fitting procedure were applied to analyse the time series and extract the frequencies of variations. We describe the noise properties to tentatively define an appropriate significance criterion, to only point out the peaks at a certain significance level. We also detect the variations related to the orbital motion and study them by using the NIGHTFALL program. The peri...

Mahy, L; Baudin, F; Rauw, G; Godart, M; Morel, T; Degroote, P; Aerts, C; Blomme, R; Cuypers, J; Noels, A; Michel, E; Baglin, A; Auvergne, M; Catala, C; Samadi, R

2010-01-01T23:59:59.000Z

107

Interferometric and seismic constraints on the roAp star alpha Cir  

E-Print Network [OSTI]

We present new constraints on the rapidly oscillating Ap star alpha Cir, derived from a combination of interferometric and photometric data obtained with the Sydney University Stellar Interferometer (SUSI) and the WIRE satellite. The highlights of our study are: 1. The first determination of the angular diameter of an roAp star. 2. A nearly model-independent determination of the effective temperature of alpha Cir, which is found to be lower than previously estimated values. 3. Detection of two new oscillation frequencies allowing a determination of the large separation of alpha Cir. Based on this new information, we have computed non-magnetic and magnetic models for alpha Cir. We show that the value of the observed large separation found from the new data agrees well with that derived from theoretical models. Moreover, we also show how the magnetic field may explain some of the anomalies seen in the oscillation spectrum and how these in turn provide constraints on the magnitude and topology of the magnetic field.

I. M. Brandao; H. Bruntt; M. Cunha; D. W. Kurtz

2008-10-31T23:59:59.000Z

108

Conceptual design of an open-cycle ocean thermal energy conversion net power-producing experiment (OC-OTEC NPPE)  

SciTech Connect (OSTI)

This report describes the conceptual design of an experiment to investigate heat and mass transfer and to assess the viability of open-cycle ocean thermal energy conversion (OC-OTEC). The experiment will be developed in two stages, the Heat- and Mass-Transfer Experimental Apparatus (HMTEA) and the Net Power-Producing Experiment (NPPE). The goal for the HMTEA is to test heat exchangers. The goal for the NPPE is to experimentally verify OC-OTEC's feasibility by installing a turbine and testing the power-generating system. The design effort met the goals of both the HMTEA and the NPPE, and duplication of hardware was minimal. The choices made for the design resource water flow rates are consistent with the availability of cold and warm seawater as a result of the seawater systems upgrade carried out by the US Department of Energy (DOE), the state of Hawaii, and the Pacific International Center for High Technology Research. The choices regarding configuration of the system were made based on projected performance, degree of technical risk, schedule, and cost. The cost for the future phase of the design and the development of the HMTEA/NPPE is consistent with the projected future program funding levels. The HMTEA and NPPE were designed cooperatively by PICHTR, Argonne National Laboratory, and Solar Energy Research Institute under the guidance of DOE. The experiment will be located at the DOE's Seacoast Test Facility at the Natural Energy Laboratory of Hawaii, Kailua-Kona, Hawaii. 71 refs., 41 figs., 34 tabs.

Bharathan, D.; Green, H.J.; Link, H.F.; Parsons, B.K.; Parsons, J.M.; Zangrando, F.

1990-07-01T23:59:59.000Z

109

The implementation of non pharmaceutical interventions(NPIs) in smaller to large communities and its relation to RO and R(t) during HIN1 pandemic 2009  

E-Print Network [OSTI]

This thesis focuses on the use of non-pharmaceutical interventions (NPIs) during the time of the 2009 HINI pandemic and its possible relation to RO and R(t). RO is defined as the mean number of people that a newly infected ...

Hashmi, Sahar

2011-01-01T23:59:59.000Z

110

Homoleptic Ce(III) and Ce(IV) Nitroxide Complexes: Significant Stabilization of the 4+ Oxidation State  

SciTech Connect (OSTI)

Electrochemical experiments performed on the complex Ce-IV[2-((BuNO)-Bu-t)py](4), where [2-((BuNO)-Bu-t)py](-) = N-tert-butyl-N-2-pyridylnitroxide, indicate a 2.51 V stabilization of the 4+ oxidation state of Ce compared to [(Bu4N)-Bu-n](2)[Ce(NO3)(6)] in acetonitrile and a 2.95 V stabilization compared to the standard potential for the ion under aqueous conditions. Density functional theory calculations suggest that this preference for the higher oxidation state is a result of the tetrakis(nitroxide) ligand framework at the Ce cation, which allows for effective electron donation into, and partial covalent overlap with, vacant 4f orbitals with delta symmetry. The results speak to the behavior of CeO2 and related solid solutions in oxygen uptake and transport applications, in particular an inherent local character of bonding that stabilizes the 4+ oxidation state. The results indicate a cerium(IV) complex that has been stabilized to an unprecedented degree through tuning of its ligand-field environment.

Bogart, Justin A.; Lewis, Andrew J.; Medling, Scott A.; Piro, Nicholas A.; Carroll, Patrick J.; Booth, Corwin H.; Schelter, Eric J.

2014-06-25T23:59:59.000Z

111

Comparative clustering analysis of variable stars in the Hipparcos, OGLE Large Magellanic Cloud and CoRoT exoplanet databases  

E-Print Network [OSTI]

Context. Discovery of new variability classes in large surveys using multivariate statistics techniques such as clustering, relies heavily on the correct understanding of the distribution of known classes as point processes in parameter space. Aims. Our objective is to analyze the correspondence between the classical stellar variability types and the clusters found in the distribution of light curve parameters and colour indices of stars in the CoRoT exoplanet sample. The final aim is to help in the identification on new types of variability by first identifying the well known variables in the CoRoT sample. Methods. We apply unsupervised classification algorithms to identify clusters of variable stars from modes of the probability density distribution. We use reference variability databases (Hipparcos and OGLE) as a framework to calibrate the clustering methodology. Furthermore, we use the results from supervised classification methods to interpret the resulting clusters. Results.We interpret the clusters in ...

Sarro, L M; Aerts, C; Lpez, M

2009-01-01T23:59:59.000Z

112

Measurements of magnetic fields over the pulsation cycle in six roAp stars with FORS1 at the VLT  

E-Print Network [OSTI]

With FORS1 at the VLT we have tried for the first time to measure the magnetic field variation over the pulsation cycle in six roAp stars to begin the study of how the magnetic field and pulsation interact. For the star HD101065, which has one of the highest photometric pulsation amplitudes of any roAp star, we found a signal at the known photometric pulsation frequency at the 3 sigma level in one data set; however this could not be confirmed by later observations. A preliminary simple calculation of the expected magnetic variations over the pulsation cycle suggests that they are of the same order as our current noise levels, leading us to expect that further observations with increased S/N have a good chance of achieving an unequivocal detection.

S. Hubrig; D. W. Kurtz; S. Bagnulo; T. Szeifert; M. Schoeller; G. Mathys; W. A. Dziembowski

2003-09-21T23:59:59.000Z

113

The variability of the CoRoT target HD171834: gamma Dor pulsations and/or activity?  

E-Print Network [OSTI]

We present the preliminary results of a frequency and line-profile analysis of the CoRoT gamma Dor candidate HD171834. The data consist of 149 days of CoRoT light curves and a ground-based dataset of more than 1400 high-resolution spectra, obtained with six different instruments. Low-amplitude frequencies between 0 and 5 c/d, dominated by a frequency near 0.96 c/d and several of its harmonics, are detected. These findings suggest that HD171834 is not a mere gamma Dor pulsator and that stellar activity plays an important role in its variable behaviour. Based on CoRoT space data and on ground-based observations with ESO Telescopes at the La Silla Observatory under the ESO Large Programmes ESO LP 178.D-0361 and ESO LP 182.D-0356 (FEROS/2.2m and HARPS/3.6m), and data collected with FOCES/2.2m at the Centro Astronomico Hispano Aleman at Calar Alto, SOPHIE/1.93m at Observatoire de Haute Provence, FIES/NOT at Observatorio del Roque de los Muchachos, and HERCULES/1.0m at Mount John University Observatory.

Uytterhoeven, K; Baglin, A; Rainer, M; Poretti, E; Amado, P; Chapellier, E; Mantegazza, L; Pollard, K; Suarez, J C; Kilmartin, P M; Sato, K H; Garcia, R A; Auvergne, M; Michel, E; Samadi, R; Catala, C; Baudin, F

2011-01-01T23:59:59.000Z

114

Pulsation spectrum of Delta Sct stars: the binary HD 50870 as seen with CoRoT and HARPS  

E-Print Network [OSTI]

We present the results obtained with the CoRoT satellite for HD 50870, a Delta Sct star which was observed for 114.4 d. The 307,570 CoRoT datapoints were analysed with different techniques. The photometric observations were complemented over 15 nights of high-resolution spectroscopy with HARPS on a baseline of 25 d. Some uvby photometric observations were also obtained to better characterize the pulsation modes. HD 50870 proved to be a low-amplitude, long-period spectroscopic binary system seen almost pole-on (i~21 deg. The brighter component, which also has the higher rotational velocity (v sin i=37.5 km/s), is a delta Sct-type variable. There is a dominant axisymmetric mode (17.16 c/d). After the detection of about 250 terms (corresponding to an amplitude of about 0.045 mmag) a flat plateau appears in the power spectrum in the low-frequency region up to about 35 c/d. We were able to detect this plateau only thanks to the short cadence sampling of the CoRoT measurements (32 s). The density distribution vs. f...

Mantegazza, L; Michel, E; Rainer, M; Baudin, F; Hernandez, A Garcia; Semaan, T; Alvarez, M; Amado, P J; Garrido, R; Mathias, P; Moya, A; Suarez, J C; Auvergne, M; Baglin, A; Catala, C; Samadi, R

2012-01-01T23:59:59.000Z

115

Luminescence Enhancement of CdTe Nanostructures in LaF3:Ce/CdTe...  

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

Enhancement of CdTe Nanostructures in LaF3:CeCdTe Nanocomposites. Luminescence Enhancement of CdTe Nanostructures in LaF3:CeCdTe Nanocomposites. Abstract: Radiation detection...

116

The suburban villa (munya) and court culture in Umayyad Cordoba (756-976 CE)  

E-Print Network [OSTI]

As the capital of the Umayyad dynasty (r. 756 CE-1031 CE), the city of Cordoba developed into one of the most renowned urban centers of the western Mediterranean. The Great Mosque of Cordoba is the outstanding testament ...

Anderson, Glaire D

2005-01-01T23:59:59.000Z

117

CE 467 / 567 HIGHWAY SAFETY AND OPERATIONS Fall 2006 Course Syllabus  

E-Print Network [OSTI]

1 CE 467 / 567 HIGHWAY SAFETY AND OPERATIONS Fall 2006 Course Syllabus Catalog This course of class) #12;2 CE 467 / 567 HIGHWAY SAFETY AND OPERATIONS Fall 2006 Course Syllabus Course Outline: What

Hickman, Mark

118

E-Print Network 3.0 - allanita-ce vinculadas al Sample Search...  

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

allanita-ce vinculadas al Search Powered by Explorit Topic List Advanced Search Sample search results for: allanita-ce vinculadas al Page: << < 1 2 3 4 5 > >> 1 Elena Garrigs Mic,...

119

CE FLNG, LLC - FE DKT. NO. 12-123-LNG - ORDER 3193 | Department...  

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

CE FLNG, LLC - FE DKT. NO. 12-123-LNG - ORDER 3193 CE FLNG, LLC - FE DKT. NO. 12-123-LNG - ORDER 3193 No reports submitted for this docket. More Documents & Publications...

120

Proactive Design of n-Type (In, Ce) Filled Skutterudites Enabling...  

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

Design of n-Type (In, Ce) Filled Skutterudites Enabling High-Temperature Waste Heat Recovery Proactive Design of n-Type (In, Ce) Filled Skutterudites Enabling High-Temperature...

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


121

Magnetic structures and interplay between rare-earth Ce and Fe magnetism in single-crystal CeFeAsO  

SciTech Connect (OSTI)

Neutron and synchrotron resonant x-ray magnetic scattering (RXMS) complemented by heat capacity and resistivity measurements reveal the evolution of the magnetic structures of Fe and Ce sublattices in a CeFeAsO single crystal. The RXMS of magnetic reflections at the Ce LII edge shows a magnetic transition that is specific to the Ce antiferromagnetic long-range ordering at TCe? 4 K with short-range Ce ordering above TCe, whereas neutron diffraction measurements of a few magnetic reflections indicate a transition at T?? 12 K with an unusual order parameter. Detailed order-parameter measurements on several magnetic reflections by neutrons show a weak anomaly at 4 K that we associate with the Ce ordering. The successive transitions at TCe and T? can also be clearly identified by two anomalies in heat capacity and resistivity measurements. The higher transition temperature at T?? 12 K is mainly ascribed to Fe spin reorientation transition, below which Fe spins rotate uniformly and gradually in the ab plane. The Fe spin reorientation transition and short-range Ce ordering above TCe reflect the strong Fe-Ce couplings prior to long-range ordering of the Ce. The evolution of the intricate magnetic structures in CeFeAsO going through T? and TCe is proposed.

Zhang, Qiang [Ames Laboratory; Tian, Wei [Ames Laboratory; Li, Haifeng [Ames Laboratory; Kim, Jong-Woo [Argonne Naitonal Laboratory; Yan, Jiaqiang [Ames Laboratory; McCallum, Robert William [Ames Laboratory; Lograsso, Thomas A. [Ames Laboratory; Zarestky, Jerel L. [Ames Laboratory; Budko, Sergey L. [Ames Laboratory; McQueeney, Robert J. [Ames Laboratory; Vaknin, David [Ames Laboratory

2013-11-27T23:59:59.000Z

122

ue Ce ec o o es o a Energy Efficiency &  

E-Print Network [OSTI]

phenomena improving MEA and stack performance · Optimize fuel cells and systems for early marketue Ce ec o o es o a Energy Efficiency & Renewable Energy Fuel Cell Bus Workshop Overview and Purppose Dimitrios Papageorgopoulos Fuel Cell Technologgies Proggram DOE and DOT Joint Fuel Cell Bus

123

University of Saskatchewan College of Arts & sCienCe  

E-Print Network [OSTI]

University of Saskatchewan College of Arts & sCienCe Annual report 2009/2010 #12;Contents The Dean thought....The strong work ethic of the youth of Saskatchewan, who are then exposed to high- minded Simard, BA'69, LLB'70 Minister of Health, Government of Saskatchewan (1991­1995) #12;The dean's message I

Patterson, William P.

124

2014 Course Description Solid Waste Engineering -CE 477  

E-Print Network [OSTI]

2014 Course Description Solid Waste Engineering - CE 477 Engineering Principles of Solid Waste on course web site http://people.engr.ncsu.edu/barlaz/ Solid Waste Technology & Management by Christensen et al (eBook available through NCSU libraries) Solid waste management must be addressed by virtually

Barlaz, Morton A.

125

CE 469 / 569 TRAVEL DEMAND MODELING Spring 2006 Course Syllabus  

E-Print Network [OSTI]

of travel demand data, and should apply these methods to estimating and to forecasting travel demand these to practical modeling scenarios. The student should also use existing computer tools to forecast travel demand1 CE 469 / 569 TRAVEL DEMAND MODELING Spring 2006 Course Syllabus Catalog Detailed investigation

Hickman, Mark

126

Seven-quasiparticle bands in {sup 139}Ce  

SciTech Connect (OSTI)

The high spin states in the {sup 139}Ce nucleus have been studied by in-beam {gamma}-spectroscopic techniques using the reaction {sup 130}Te({sup 12}C,3n){sup 139}Ce at E{sub beam}=65 MeV. A gamma detector array, consisting of five Compton-suppressed Clover detectors was used for coincidence measurements. 15 new levels have been proposed and 28 new {gamma} transitions have been assigned to {sup 139}Ce on the basis of {gamma}{gamma} coincidence data. The level scheme of {sup 139}Ce has been extended above the known 70 ns (19/2){sup -} isomer up to {approx}6.1 MeV in excitation energy and (35/2)({Dirac_h}/2{pi}) in spin. The spin-parity assignments for most of the newly proposed levels have been made using the deduced Directional Correlation from Oriented states of nuclei (DCO ratio) and the Polarization Directional Correlation from Oriented states (PDCO ratio) for the de-exciting transitions. The observed level structure has been compared with a large basis shell model calculation and also with the predictions from cranked Nilsson-Strutinsky (CNS) calculations. A general consistency has been observed between these two different theoretical approaches.

Chanda, Somen; Bhattacharjee, Tumpa; Bhattacharyya, Sarmishtha; Mukherjee, Anjali; Basu, Swapan Kumar; Ragnarsson, I.; Bhowmik, R. K.; Muralithar, S.; Singh, R. P.; Ghugre, S. S.; Pramanik, U. Datta [Variable Energy Cyclotron Centre, Kolkata 700064 (India); Division of Mathematical Physics, Lund Institute of Technology, Lund University, P. O. Box 118, S-22100 Lund (Sweden); Inter University Accelerator Centre, New Delhi 110067 (India); University Grants Commission and Department of Atomic Energy Consortium for Scientific Research, Kolkata 700098 (India); Saha Institute of Nuclear Physics, Kolkata 700064 (India)

2009-05-15T23:59:59.000Z

127

CE 4990 -Construction Scheduling Week 1: Steel Frame Project  

E-Print Network [OSTI]

CE 4990 - Construction Scheduling Week 1: Steel Frame Project Fall 2011 January 13, 2012 Introduction You are a construction manager for a project to build a steel frame for an office building1 of 964 pre-fabricated structural steel members will be used in the construction. The standard bay size

Mukherjee, Amlan

128

Thermodynamic and Structural Features of Aqueous Ce(III)  

SciTech Connect (OSTI)

With a single f-electron, Ce(III) is the simplest test case for benchmarking the thermodynamic and structural properties of hydrated Ln(III) against varying density functionals and reaction field models, in addition to determining the importance of multiconfigurational character in their wave functions. Here, the electronic structure of Ce(H2O)x(H2O)y3+ (x = 8, 9; y = 0, 12-14) has been examined using DFT and CASSCF calculations. The latter confirmed that the wave function of octa- and nona-aqua Ce(III) is well-described by a single configuration. Benchmarking was performed for density functionals, reaction field cavity types, and solvation reactions against the experimental free energy of hydration, ?Ghyd(Ce3+). The UA0, UAKS, Pauling, and UFF polarized continuum model cavities displayed different performance, depending on whether one or two hydration shells were examined, and as a function of the size of the metal basis set. These results were essentially independent of the density functional employed. Using these benchmarks, the free energy for water exchange between CN = 8 and CN = 9, for which no experimental data are available, was estimated to be approximately -4 kcal/mol.

Adriana Dinescu; Aurora E. Clark

2008-10-01T23:59:59.000Z

129

Thermodynamic and Structural Features of Aqueous Ce(III)  

SciTech Connect (OSTI)

With a single f-electron, Ce(III) is the simplest test case for benchmarking the thermodynamic and structural properties of hydrated Ln(III) against varying density functionals and reaction field models, in addition to determining the importance of multiconfigurational character in their wave functions. Here, the electronic structure of Ce(H?O)x(H?O)y 3+ (x =8, 9; y= 0, 12-14) has been examined using DFT and CASSCF calculations. The latter confirmed that the wave function of octa- and nona-aqua Ce(III) is well-described by a single configuration. Benchmarking was performed for density functionals, reaction field cavity types, and solvation reactions against the experimental free energy of hydration, ?Ghyd(Ce3+). The UA0, UAKS, Pauling, and UFF polarized continuum model cavities displayed different performance, depending on whether one or two hydration shells were examined, and as a function of the size of the metal basis set. These results were essentially independent of the density functional employed. Using these benchmarks, the free energy for water exchange between CN = 8 and CN = 9, for which no experimental data are available, was estimated to be approximately -4 kcal/mol.

Dinescu, Adriana; Clark, Aurora E.

2008-10-10T23:59:59.000Z

130

CO Oxidation mechanism on CeO2-supported Au nanoclusters  

SciTech Connect (OSTI)

To reveal the richer chemistry of CO oxidation by CeO2 supported Au Nanoclusters(NCs)/Nanoparticles, we design Au13 and Au12 supported on a flat and a stepped-CeO2 model (Au/CeO2) and study various kinds of CO oxidation mechanisms at the Au-CeO2 interface and the Au NC as well.

Kim H. Y.; Henkelman, G.

2013-09-08T23:59:59.000Z

131

In this Issue International CeBiTec Research Conference on Algal Biotechnology  

E-Print Network [OSTI]

Biotechnology From September 21 to 24, 2014, the CeBiTec organized the 4th International CeBiTec Research production. In this respect, the 4th International CeBiTec Research Conference 2014 aimed to give a completeBiTec ­ Quarterly www.cebitec.uni-bielefeld.de #12;2 | 4 CeBiTec ­ Quarterly | Autumn 2014 International

Moeller, Ralf

132

Neutron scattering of CeNi at the SNS-ORNL: A preliminary report  

SciTech Connect (OSTI)

This is a preliminary report of a neutron scattering experiment used to investigate 4f electron behavior in Ce.

Mirmelstein, A. [Russian Federal Nuclear Center VNIITF, Snezhinsk, Russia; Podlesnyak, Andrey A [ORNL; Kolesnikov, Alexander I [ORNL; Saporov, B. [Oak Ridge National Laboratory (ORNL); Sefat, A.S. [Oak Ridge National Laboratory (ORNL); Tobin, J. G. [Lawrence Livermore National Laboratory (LLNL)

2014-01-01T23:59:59.000Z

133

DAO O ce Note 1998-05 Version 1 Dated 12/06/1999 O ce Note Series on  

E-Print Network [OSTI]

Assimilation Siegfried Schubert, Editor Documentation of the Physical-Space Statistical Analysis System (PSAS and sources, as well as the use of the multivariate formulation. An on-line version of this document can be obtained from the DAO. Robert M. Atlas, Acting Head Data Assimilation O ce Goddard Space Flight Center

134

GFD-1 AS509/OC512 Problem Set 5 / Review problems Out: Thurday 5 March 2009 Back: Thursday 12 March 2009  

E-Print Network [OSTI]

energy Solar radiation drives almost all of the interesting motions of the atmosphere and ocean (there1 1 GFD-1 AS509/OC512 Problem Set 5 / Review problems Out: Thurday 5 March 2009 Back: Thursday 12 March 2009 Solve and turn in 3 of the following problems; use the rest in studying for the take

135

www.ce.udel.edu/speakers ENVIRONMENTAL ENGINEERING  

E-Print Network [OSTI]

strategies" Dr. Angelia Seyfferth Assistant Professor Department of Plant and soil science UNIversITy Of DelAWAre MAR 08 "Tradeoffs in Water Quality Management: risk, economics and equity" Dr. Michael Kavanaugh-831-2442 "sustainable stormwater research" Dr. Robert G. Traver Director vIllANOvA CeNTer fOr The ADvANCeMeNT Of sUsTAINAbIlITy

Kirby, James T.

136

The CoRoT target HD175726: an active star with weak solar-like oscillations  

E-Print Network [OSTI]

Context. The CoRoT short runs give us the opportunity to observe a large variety of late-type stars through their solar-like oscillations. We report observations of the star HD175726 that lasted for 27 days during the first short run of the mission. The time series reveals a high-activity signal and the power spectrum presents an excess due to solar-like oscillations with a low signal-to-noise ratio. Aims. Our aim is to identify the most efficient tools to extract as much information as possible from the power density spectrum. Methods. The most productive method appears to be the autocorrelation of the time series, calculated as the spectrum of the filtered spectrum. This method is efficient, very rapid computationally, and will be useful for the analysis of other targets, observed with CoRoT or with forthcoming missions such as Kepler and Plato. Results. The mean large separation has been measured to be 97.2+-0.5 microHz, slightly below the expected value determined from solar scaling laws.We also show stro...

Mosser, B; Appourchaux, T; Barban, C; Baudin, F; Boumier, P; Bruntt, H; Catala, C; Deheuvels, S; Garca, R A; Gaulme, P; Regulo, C; Roxburgh, I; Samadi, R; Verner, G; Auvergne, M; Baglin, A; Ballot, J; Benomar, O; Mathur, S

2009-01-01T23:59:59.000Z

137

A fresh look at the seismic spectrum of HD49933: analysis of 180 days of CoRoT photometry  

E-Print Network [OSTI]

Solar-like oscillations have now been observed in several stars, thanks to ground-based spectroscopic observations and space-borne photometry. CoRoT, which has been in orbit since December 2006, has observed the star HD49933 twice. The oscillation spectrum of this star has proven difficult to interpret. Thanks to a new timeseries provided by CoRoT, we aim to provide a robust description of the oscillations in HD49933, i.e., to identify the degrees of the observed modes, and to measure mode frequencies, widths, amplitudes and the average rotational splitting. Several methods were used to model the Fourier spectrum: Maximum Likelihood Estimators and Bayesian analysis using Markov Chain Monte-Carlo techniques. The different methods yield consistent result, and allow us to make a robust identification of the modes and to extract precise mode parameters. Only the rotational splitting remains difficult to estimate precisely, but is clearly relatively large (several microHz in size).

Benomar, O; Campante, T L; Chaplin, W J; Garca, R A; Gaulme, P; Toutain, T; Verner, G A; Appourchaux, T; Ballot, J; Barban, C; Elsworth, Y; Mathur, S; Mosser, B; Rgulo, C; Roxburgh, I W; Auvergne, M; Baglin, A; Catala, C; Michel, E; Samadi, R

2009-01-01T23:59:59.000Z

138

UnivErSity of MiaMi roSEnStiEl SChool of MarinE and atMoSphEriC SCiEnCE  

E-Print Network [OSTI]

seasonal climate, to provide scientifically sound information and decision sup- port tools for agriculture, and to develop teaching and decision support tools based on climate information. Partner institutions include forestry risk and its minimization; water quality assessment and policy analysis; and the development

Miami, University of

139

Approved Module Information for CE1102, 2014/5 Module Title/Name: Organic Chemistry for Engineers Module Code: CE1102  

E-Print Network [OSTI]

Approved Module Information for CE1102, 2014/5 Module Title/Name: Organic Chemistry for Engineers Module Code: CE1102 School: Engineering and Applied Science Module Type: Standard Module New Module chemistry. Part 2: Introduction to Laboratory Skills To enable the student to develop good practical skills

Neirotti, Juan Pablo

140

Strongly correlated electron behavior : superconductivity and non-Fermi liquid behavior in Ce?-xRxColn?  

E-Print Network [OSTI]

T ( ) c T ( c ab La Ce Pr Nd PmSm Eu Gd Tb Dy Ho Er Tm YbSm x Ce La Tb La Ce Pr Nd PmSm Eu Gd Tb Dy Ho Er Tm Yb (b)g -1) J(J+1) Ce (a) La Ce Pr Nd PmSm Eu Gd Tb Dy Ho Er Tm Yb

Gonzales, Eileen

2009-01-01T23:59:59.000Z

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


141

HD 51106 and HD 50747: an ellipsoidal binary and a triple system observed with CoRoT  

E-Print Network [OSTI]

We present an analysis of the observations of HD 51106 and HD 50747 by the satellite CoRoT, obtained during its initial run, and of the spectroscopic preparatory observations. AIMS: We complete an analysis of the light curve, extract the main frequencies observed, and discuss some preliminary interpretations about the stars. Methods: We used standard Fourier transform and pre-whitening methods to extract information about the periodicities of the stars. Results: HD 51106 is an ellipsoidal binary, the light curve of which can be completely explained by the tidal deformation of the star and smaller secondary effects. HD 50747 is a triple system containing a variable star, which exhibits many modes of oscillation with periods in the range of a few hours. On the basis of this period range and the analysis of the physical parameters of the star, we conclude that HD 50747 is a Gamma-Doradus star.

Dolez, N; Michel, E; Hua, A Hui Bon; Vauclair, G; Contel, D Le; Mathias, P; Poretti, E; Amado, P J; Rainer, M; Samadi, R; Baglin, A; Catala, C; Auvergne, M; Uytterhoeven, K; Valtier, J C

2009-01-01T23:59:59.000Z

142

CoRoT measures solar-like oscillations and granulation in stars hotter than the Sun  

E-Print Network [OSTI]

Oscillations of the Sun have been used to understand its interior structure. The extension of similar studies to more distant stars has raised many difficulties despite the strong efforts of the international community over the past decades. The CoRoT (Convection Rotation and Planetary Transits) satellite, launched in December 2006, has now measured oscillations and the stellar granulation signature in three main sequence stars that are noticeably hotter than the sun. The oscillation amplitudes are about 1.5 times as large as those in the Sun; the stellar granulation is up to three times as high. The stellar amplitudes are about 25% below the theoretic values, providing a measurement of the nonadiabaticity of the process ruling the oscillations in the outer layers of the stars.

E. Michel; A. Baglin; M. Auvergne; C. Catala; R. Samadi

2008-12-06T23:59:59.000Z

143

Whirlpool: Order (2014-CE-21010) | Department of Energy  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGYWomen Owned SmallOf TheViolations | Department of Energyis EIA? Andof4-CE-21010)

144

LG: Proposed Penalty (2015-CE-14022) | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensionalthe10 DOEWashington, DCKickoffLDV5-CE-14022) LG: Proposed Penalty

145

Sunpentown: Order (2012-CE-1505) | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage »of Energy Strain Rate4 RecoveryJulyEvaluationOffi ce U.S. DepartmentOrder

146

Ethanol Steam Reforming on Co/CeO2: The Effect of ZnO Promoter  

SciTech Connect (OSTI)

A series of ZnO promoted Co/CeO2 catalysts were synthesized and characterized using XRD, TEM, H2-TPR, CO chemisorption, O2-TPO, IR-Py, and CO2-TPD. The effects of ZnO on the catalytic performances of Co/CeO2 were studied in ethanol steam reforming. It was found that the addition of ZnO facilitated the oxidation of Co0 via enhanced oxygen mobility of the CeO2 support which decreased the activity of Co/CeO2 in CC bond cleavage of ethanol. 3 wt% ZnO promoted Co/CeO2 exhibited minimum CO and CH4 selectivity and maximum CO2 selectivity. This resulted from the combined effects of the following factors with increasing ZnO loading: (1) enhanced oxygen mobility of CeO2 facilitated the oxidation of CHx and CO to form CO2; (2) increased ZnO coverage on CeO2 surface reduced the interaction between CHx/CO and Co/CeO2; and (3) suppressed CO adsorption on Co0 reduced CO oxidation rate to form CO2. In addition, the addition of ZnO also modified the surface acidity and basicity of CeO2, which consequently affected the C2C4 product distributions.

Davidson, Stephen; Sun, Junming; Wang, Yong

2013-12-02T23:59:59.000Z

147

CeBr3 as a High-Resolution Gamma-Ray Detector  

SciTech Connect (OSTI)

Lanthanum halide (LaBr3:Ce) scintillators have been well-documented as high-resolution gamma-ray detectors that are operated at room temperature. These scintillators have better resolution (<3% at 662 keV) relative to sodium iodide (NaI(Tl)) scintillators (7% at 662 keV), but the naturally occurring radioactive isotope 138La causes self-activity in the crystal that occludes portions of the gamma-ray spectrum. This selfactivity limits the use of LaBr3:Ce in high-sensitivity applications. Cerium, the dopant in the LaBr3:Ce matrix possesses useful scintillation properties, and its selfactivity is on the order of 3750 times less than La; however, Ce has not been fully characterized as the chief component in a scintillation detector. This work investigated Ce as the key scintillation matrix component in a scintillation detector with the hypothesis that CeBr3 promises energy resolution comparable or superior to LaBr3:Ce. The researchers involved with this work believe that CeBr3 may be the answer to obtaining high-temperature, high-resolution spectra with greater sensitivity than LaBr3:Ce.

Michael Reed, Paul Guss, Christopher Contreras

2008-11-13T23:59:59.000Z

148

Capillary electrophoresis-fluorescence line narrowing system (CE-FLNS) for on-line structural characterization  

DOE Patents [OSTI]

Capillary electrophoresis (CE) is interfaced with low temperature fluorescence line-narrowing (FLN) spectroscopy for on-line structural characterization of separated molecular analytes. 21 figs.

Jankowiak, R.J.; Small, G.J.; Shields, P.A.

1999-04-27T23:59:59.000Z

149

The Complex Core Level Spectra of CeO2: An Analysis in Terms of Atomic and Charge Transfer Effects  

SciTech Connect (OSTI)

We present a rigorous parameter-free theoretical treatment of the Ce 4s and 5s photoelectron spectra of CeO2. In the currently accepted model the satellite structure in the photoelectron spectra is explained in terms of a mixed valence (Ce 4f0 O 2p6, Ce 4f1 O 2p5, and Ce 4f2 O 2p4) con?guration. We show that charge transfer (CT) into Ce 5d as well as con?gurations involving intra-atomic movement of charge must be considered in addition and compute their contributions to the spectra.

Bagus, Paul S.; Nelin, Constance J.; Ilton, Eugene S.; Baron, Martin; Abbott, Heather; Primorac, Elena; Kuhlenbeck, Helmut; Shaikhutdinov, Shamil; Freund, Hans-Joachim

2010-03-05T23:59:59.000Z

150

Interaction of carbon monoxide with oxygen in the adsorbed layer on Pd, Ce, Pd-Ce catalysts supported on /gamma/-Al/sub 2/O/sub 3/  

SciTech Connect (OSTI)

The adsorption of CO and the interaction of CO/sub ads/ with O/sub 2/ on Pd, Ce, and Pd-Ce//gamma/-Al/sub 2/O/sub 3/ (0.5 wt. % Pd, 2.0 wt. % Ce) has been studied using the methods of IR spectroscopy and differential scanning calorimetry. The identity of the adsorbed CO complexes, the temperature ranges over which they desorb, and their reactivity with O/sub 2/ have been established. The interaction of bridging and carbonate - carboxylate CO complexes and carbon (disproportionation and dissociation products) with O/sub 2/ on Pd and Pd-Ce catalysts is preceded by the coadsorption of oxygen and the evolution of heat. During the oxidation of CO, autooscillation, heat evolution, and the concentration of oxygen in the flow are observed.

Savel'eva, G.A.; Sass, A.S.; Speranskaya, G.V.; Tenchev, K.K.; Petrov, L.A.; Vozdvizhenskii, V.F.; Galeev, T.K.; Popova, N.M.

1989-01-01T23:59:59.000Z

151

CO Oxidation at the Interface of Au Nanoclusters and the Stepped-CeO2(111) Surface  

SciTech Connect (OSTI)

To reveal the richer chemistry of CO oxidation by CeO2 supported Au Nanoclusters NCs)/Nanoparticles, we design a Au12 supported on a stepped-CeO2 model (Au/CeO2-step) and study various kinds of CO oxidation mechanisms at the interface of the Au/CeO2-step: oxygen spillover from the CeO2 to the Au NCs;2 CO oxidation by the O2 bound to the Au-Ce3+ interface;3 and CO oxidation by the Mars-van Krevelen (M-vK) mechanism.4 DFT+U calculations show that lattice oxygen at the CeO2 step edge oxidizes CO bound to Au NCs by the M-vK mechanism. CO2 desorption determines the rate of CO oxidation and the vacancy formation energy (Evac) is a reactivity descriptor for CO oxidation. The maximum Evac that insures spontaneous CO2 production is higher for the Au/CeO2-step than the Au/CeO2-surface suggesting that the CeO2-step is a better supporting material than the CeO2-surface for CO oxidation by the Au/CeO2. Our results also suggest that for CO oxidation by Au NCs supported on nano- or meso-structured CeO2, which is the case of industrial catalysts, the M-vK mechanism accounts for a large portion of the total activity.

Kim H. Y.; Henkelman, G.

2013-01-14T23:59:59.000Z

152

Phase Relations in the System Ce,O,-Ce,Si,O, in the Temperature Range 1150"to 1970C in Reducing and Inert Atmospheres  

E-Print Network [OSTI]

observed. Cerium pyrosilicate exhibits a polymorphic transformation at 1274°C. The binary compounds-tempera- ture form has long been to be the rare-earth G-type "pseudo-orthorhombic" (with a monoclinic angle,O, in dry hydrogen was reported by the same authors to be 2210" t 1O"C, without further mention

Tas, A. Cuneyt

153

Atomistic Study of Doped BaCeO3: Dopant Site-Selectivity and Cation Nonstoichiometry  

E-Print Network [OSTI]

of Technology, Pasadena, California 91125, and Materials Chemistry Group, Chemistry DiVision, Uni, the trivalent dopants are assumed to occupy the Ce4+ -site, which introduces oxygen vacancies partitioning over both Ba and Ce sites. Such partitioning reduces the concentration of oxygen vacancies, which

Haile, Sossina M.

154

p ro g r a m m E The Forest Programme further develops SLU's role as a centre of excellence for Swedish  

E-Print Network [OSTI]

and energy policy. There is an international demand for our expertise on developing forest monitoring, bothp ro g r a m m E Forest The Forest Programme further develops SLU's role as a centre of excellence for Swedish and international environmental analysis in the forest sector. Nationally speaking, the main

155

A"pTi:1e~:roD '(JNIVl!.ID;i'i'Y UEGlS'i'!lAR  

E-Print Network [OSTI]

A"pTi:1e~:roD '(JNIVl!.ID;i'i'Y UEGlS'i'!lAR COLLEGE OF NATURAL RESOURCES AND ENVIRONMENT Survey of Organic Chemistry 3 STAT 3615 Bioloqical Statistics 3 STAT 3616 Bioloqical Statistics 3 WOOD

Virginia Tech

156

Possible detection of phase changes from the non-transiting planet HD 46375b by CoRoT  

E-Print Network [OSTI]

The present work deals with the detection of phase changes in an exoplanetary system. HD 46375 is a solar analog known to host a non-transiting Saturn-mass exoplanet with a 3.0236 day period. It was observed by the CoRoT satellite for 34 days during the fall of 2008. We attempt to identify at optical wavelengths, the changing phases of the planet as it orbits its star. We then try to improve the star model by means of a seismic analysis of the same light curve and the use of ground-based spectropolarimetric observations. The data analysis relies on the Fourier spectrum and the folding of the time series. We find evidence of a sinusoidal signal compatible in terms of both amplitude and phase with light reflected by the planet. Its relative amplitude is Delta Fp/F* = [13.0, 26.8] ppm, implying an albedo A=[0.16, 0.33] or a dayside visible brightness temperature Tb ~ [1880,2030] K by assuming a radius R=1.1 R_Jup and an inclination i=45 deg. Its orbital phase differs from that of the radial-velocity signal by at...

Gaulme, P; Guillot, T; Mosser, B; Mary, D; Weiss, W W; Schmider, F -X; Bourguignon, S; Deeg, H J; Rgulo, C; Aigrain, S; Schneider, J; Bruntt, H; Deheuvels, S; Donati, J -F; Appourchaux, T; Auvergne, M; Baglin, A; Baudin, F; Catala, C; Michel, E; Samadi, R; 10.1051/0004-6361/201014303

2010-01-01T23:59:59.000Z

157

Accurate p-mode measurements of the G0V metal-rich CoRoT target HD 52265  

E-Print Network [OSTI]

The star HD 52265 is a G0V metal-rich exoplanet-host star observed in the seismology field of the CoRoT space telescope from November 2008 to March 2009. The satellite collected 117 days of high-precision photometric data on this star, showing that it presents solar-like oscillations. HD 52265 was also observed in spectroscopy with the Narval spectrograph at the same epoch. We characterise HD 52265 using both spectroscopic and seismic data. The fundamental stellar parameters of HD 52265 were derived with the semi-automatic software VWA, and the projected rotational velocity was estimated by fitting synthetic profiles to isolated lines in the observed spectrum. The parameters of the observed p modes were determined with a maximum-likelihood estimation. We performed a global fit of the oscillation spectrum, over about ten radial orders, for degrees l=0 to 2. We also derived the properties of the granulation, and analysed a signature of the rotation induced by the photospheric magnetic activity. Precise determin...

Ballot, J; Samadi, R; Vauclair, G; Benomar, O; Bruntt, H; Mosser, B; Stahn, T; Verner, G A; Campante, T L; Garca, R A; Mathur, S; Salabert, D; Gaulme, P; Rgulo, C; Roxburgh, I W; Appourchaux, T; Baudin, F; Catala, C; Chaplin, W J; Deheuvels, S; Michel, E; Bazot, M; Creevey, O; Dolez, N; Elsworth, Y; Sato, K H; Vauclair, S; Auvergne, M; Baglin, A; 10.1051/0004-6361/201116547

2011-01-01T23:59:59.000Z

158

Constraining magnetic-activity modulations in 3~solar-like stars observed by CoRoT and NARVAL  

E-Print Network [OSTI]

Stellar activity cycles are the manifestation of dynamo process running in the stellar interiors. They have been observed during years to decades thanks to the measurement of stellar magnetic proxies at the surface of the stars such as the chromospheric and X-ray emissions, and the measurement of the magnetic field with spectropolarimetry. However, all of these measurements rely on external features that cannot be visible during for example, a Maunder-type minimum. With the advent of long observations provided by space asteroseismic missions, it has been possible to pierce inside the stars and study their properties. Moreover, the acoustic-mode properties are also perturbed by the presence of these dynamos. We track the temporal variations of the amplitudes and frequencies of acoustic modes allowing us to search for signature of magnetic activity cycles, as has already been done in the Sun and in the CoRoT target HD49933. We use asteroseimic tools and more classical spectroscopic measurements performed with t...

Mathur, S; Morgenthaler, A; Salabert, D; Petit, P; Ballot, J; Regulo, C; Catala, C

2012-01-01T23:59:59.000Z

159

Ternary ceramic alloys of Zr-Ce-Hf oxides  

DOE Patents [OSTI]

A ternary ceramic alloy is described which produces toughening of zirconia and zirconia composites through the stress transformation from tetragonal phase to monoclinic phase. This alloy, having the general formula Ce[sub x]Hf[sub y]Zr[sub 1[minus]x[minus]y]O[sub 2], is produced through the addition of appropriate amounts of ceria and hafnia to the zirconia. Typically, improved toughness is achieved with about 5 to about 15 mol % ceria and up to about 40 mol % hafnia. The preparation of alloys of these compositions are given together with data as to the densities, tetragonal phase content, hardness and fracture toughness. The alloys are useful in preparing zirconia bodies as well as reinforcing ceramic composites. 1 fig.

Becher, P.F.; Funkenbusch, E.F.

1990-11-20T23:59:59.000Z

160

Ternary ceramic alloys of ZR-CE-HF oxides  

DOE Patents [OSTI]

A ternary ceramic alloy which produces toughening of zirconia and zirconia composites through the stress transformation from tetragonal phase to monoclinic phase. This alloy, having the general formula Ce.sub.x Hf.sub.y Zn.sub.1-x-y O.sub.2, is produced through the addition of appropriate amounts of ceria and hafnia to the zirconia. Typically, improved toughness is achieved with about 5 to about 15 mol % ceria and up to about 40 mol % hafnia. The preparation of alloys of these compositions are given together with data as to the densities, tetragonal phase content, hardness and fracture toughness. The alloys are useful in preparing zirconia bodies as well as reinforcing ceramic composites.

Becher, Paul F. (Oak Ridge, TN); Funkenbusch, Eric F. (White Bear Lake, MN)

1990-01-01T23:59:59.000Z

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


161

Sandia National Laboratories: RO  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -theErik SpoerkeSolar Regional Test CenterCMCNational LaboratoriesRFRO ECIS-UNM:

162

Knuteson-RO  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFunInfraredJeffersonJonathan PershingrelocatesKayeAnalysisKirstenrole of theAERIs

163

Measurements of gas sorption from seawater and the influence of gas release on open-cycle ocean thermal energy conversion (OC-OTEC) system performance  

SciTech Connect (OSTI)

The technical community has questioned the validity and cost-effectiveness of open-cycle ocean thermal energy conversion (OC-OTEC) systems because of the unknown effect of noncondensable gas on heat exchanger performance and the power needed to run vacuum equipment to remove this gas. To date, studies of seawater gas desorption have not been prototypical for system level analysis. This study gives preliminary gas desorption data on a vertical spout, direct contact evaporator and multiple condenser geometries. Results indicate that dissolved gas can be substantially removed before the seawater enters the heat exchange process, reducing the uncertainty and effect of inert gas on heat exchanger performance.

Penney, T.R.; Althof, J.A.

1985-06-01T23:59:59.000Z

164

1synQPSK Univ. Paderborn, Germany; CeLight Israel; Photline, France; IPAG, Germany Univ. Paderborn, Germany  

E-Print Network [OSTI]

1synQPSK Univ. Paderborn, Germany; CeLight Israel; Photline, France; IPAG, Germany synQPSK Univ. Paderborn, Germany CeLight Israel Photline, France IPAG, Germany Contract 004631 in FP6 IST-2002 Phase Shift Keying Transmission #12;2synQPSK Univ. Paderborn, Germany; CeLight Israel; Photline, France

Noé, Reinhold

165

Synthesis and magnetic properties of the double layer perovskite CeBaFe2O5+w  

E-Print Network [OSTI]

Synthesis and magnetic properties of the double layer perovskite CeBaFe2O5+w R. L. de Almeida,1 O The synthesis, crystallographic structure, and magnetic properties of polycrystalline single-phase samples of CeBaFe results on the successful prepara- tion and characterization of polycrystalline CeBaFe2O5+w samples. Ideal

de Lima, Oscar Ferreira

166

Reassessment of Al-Ce and Al-Nd Binary Systems Supported by Critical Experiments and First-Principles  

E-Print Network [OSTI]

Reassessment of Al-Ce and Al-Nd Binary Systems Supported by Critical Experiments and First The present study reinvestigates the Al-Ce and Al-Nd phase diagrams and reoptimizes their thermody- namics results and theoretical calculations show that Al2Nd (or Al2Ce) should be treated as a stoichiometric

Widom, Michael

167

Studies on Cu/CeO{sub 2}: A new NO reduction catalyst  

SciTech Connect (OSTI)

Fine particle and large surface area Cu/CeO{sub 2} catalysts of crystallite sizes in the range of 100--200 {angstrom} synthesized by the solution combustion method have been investigated for NO reduction. Five percent Cu/CeO{sub 2} catalyst shows nearly 100% conversion of NO by NH{sub 3} below 300 C, whereas pure ceria and Zr, Y, and Ca doped ceria show 85--95% NO conversion above 600 C. Similarly NO reduction by CO has been observed over 5% Cu/CeO{sub 2} with nearly 100% conversion below 300 C. Hydrocarbon (n-butane) oxidation by NO to CO{sub 2}, N{sub 2}, and H{sub 2}O has also been demonstrated over this catalyst below 350 C making Cu/CeO{sub 2} a new NO reduction catalyst in the low temperature window of 150--350 C. Kinetics of NO reduction over 5% Cu/CeO{sub 2} have also been investigated. The rate constants are in the range of 1.4 {times} 10{sup 4} to 2.3 {times} 10{sup 4} cm{sup 3}/g s between 170 and 300 C. Cu/CeO{sub 2} catalysts are characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and electron paramagnetic resonance spectroscopy where Cu{sup 2+} ions are shown to be dispersed on the CeO{sub 2} surface.

Bera, P.; Aruna, S.T.; Patil, K.C.; Hegde, M.S. [Indian Inst. of Science, Bangalore (India)] [Indian Inst. of Science, Bangalore (India)

1999-08-15T23:59:59.000Z

168

Studies on Ca2+-Doped CeBr3 Scintillating Materials  

SciTech Connect (OSTI)

Despite the outstanding scintillation performance characteristics of cerium tribromide (CeBr3) and cerium-activated lanthanum tribromide (LaBr3:Ce), their commercial availability and application is limited due to the difficulties of growing large, crack-free single crystals from these fragile materials. The objective of this investigation was to employ aliovalent doping to increase crystal strength while maintaining the optical properties of the crystal. One divalent dopant (Ca2+) was investigated as a dopant to strengthen CeBr3 without negatively impacting scintillation performance. Ingots containing nominal concentrations of 1.9% of the Ca2+ dopant were grown. Preliminary scintillation measurements are presented for this aliovalently doped scintillator. Ca2+-doped CeBr3 exhibited little or no change in the peak fluorescence emission for 371 nm optical excitation for CeBr3. The structural, electronic, and optical properties of CeBr3 crystals were investigated using the density functional theory within generalized gradient approximation. The calculated lattice parameters are in good agreement with the experimental data. The energy band structures and density of states were obtained. The optical properties of CeBr3, including the dielectric function, were calculated.

Guss, P. [NSTec; Foster, M. E. [SNL; Wong, B. M. [SNL; Doty, F. P. [SNL; Shah, K. [RMD; Squillante, M. [RMD; Glodo, J. [RMD; Yuan, D. [NSTec

2013-07-03T23:59:59.000Z

169

Studies on Ca2+-Doped CeBr3 Scintillating Materials  

SciTech Connect (OSTI)

Despite the outstanding scintillation performance characteristics of cerium tribromide (CeBr3) and cerium-activated lanthanum tribromide (LaBr3:Ce), their commercial availability and application is limited due to the difficulties of growing large, crack-free single crystals from these fragile materials. The objective of this investigation was to employ aliovalent doping to increase crystal strength while maintaining the optical properties of the crystal. One divalent dopant (Ca2+) was investigated as a dopant to strengthen CeBr3 without negatively impacting scintillation performance. Ingots containing nominal concentrations of 1.9% of the Ca2+ dopant were grown. Preliminary scintillation measurements are presented for this aliovalently doped scintillator. Ca2+-doped CeBr3 exhibited little or no change in the peak fluorescence emission for 371 nm optical excitation for CeBr3. The structural, electronic, and optical properties of CeBr3 crystals were investigated using the density functional theory within generalized gradient approximation. The calculated lattice parameters are in good agreement with the experimental data. The energy band structures and density of states were obtained. The optical properties of CeBr3, including the dielectric function, were calculated.

Guss, P. [NSTec; Foster, M. E. [SNL; Wong, B. M. [SNL; Doty, F. P. [SNL; Shah, K. [RMD; Squillante, M. R. [RMD; Shirwadkar, U. [RMD; Hawrami, R. [RMD; Tower, J. [RMD; Yuan, D. [NSTec

2013-09-01T23:59:59.000Z

170

Oxidation of Slurry Aluminide Coatings on Cast Stainless Steel Alloy CF8C-Plus at 800oC in Water Vapor  

SciTech Connect (OSTI)

A new, cast austenitic stainless steel, CF8C-Plus, has been developed for a wide range of high temperature applications, including diesel exhaust components, turbine casings and turbocharger housings. CF8C-Plus offers significant improvements in creep rupture life and creep rupture strength over standard CF8C steel. However, at higher temperatures and in more aggressive environments, such as those containing significant water vapor, an oxidation-resistant protective coating will be necessary. The oxidation behavior of alloys CF8C and CF8C-Plus with various aluminide coatings were compared at 800oC in air plus 10 vol% water vapor. Due to their affordability, slurry aluminides were the primary coating system of interest, although chemical vapor deposition (CVD) and pack cementation coatings were also compared. Additionally, a preliminary study of the low cycle fatigue behavior of aluminized CF8C-Plus was conducted at 800oC. Each type of coating provided substantial improvements in oxidation behavior, with simple slurry aluminides showing very good oxidation resistance after 4,000 h testing in water vapor. Preliminary low cycle fatigue results indicated that thicker aluminide coatings degraded high temperature fatigue properties of CF8C-Plus, whereas thinner coatings did not. Results suggest that appropriately designed slurry aluminide coatings are a viable option for economical, long-term oxidation protection of austenitic stainless steels in water vapor.

Haynes, James A [ORNL; Armstrong, Beth L [ORNL; Dryepondt, Sebastien N [ORNL; Kumar, Deepak [ORNL; Zhang, Ying [Tennessee Technological University

2013-01-01T23:59:59.000Z

171

CoRoT's view on variable B8/9 stars: spots versus pulsations: Evidence for differential rotation in HD 174648  

E-Print Network [OSTI]

Context. There exist few variability studies of stars in the region in the Hertzsprung-Russell diagram between the A and B-star pulsational instability strips. With the aid of the high precision continuous measurements of the CoRoT space satellite, low amplitudes are more easily detected, making a study of this neglected region worthwhile. Aims. We collected a small sample of B stars observed by CoRoT to determine the origin of the different types of variability observed. Methods. We combine literature photometry and spectroscopy to measure the fundamental parameters of the stars in the sample, and compare asteroseismic modelling of the light curves with (differentially rotating) spotted star models. Results. We found strong evidence for the existence of spots and differential rotation in HD 174648, and formulated hypotheses for their origin. We show that the distinction between pulsations and rotational modulation is difficult to make solely based on the light curve, especially in slowly rotating stars.

Degroote, P; Samadi, R; Aerts, C; Kurtz, D W; Noels, A; Miglio, A; Montalban, J; Bloemen, S; Baglin, A; Baudin, F; Catala, C; Michel, E; Auvergne, M

2011-01-01T23:59:59.000Z

172

Bryant fall 2010 FC fall 2010a Bryant Unive rsity resoU rce fo r P ro fessional sUccess  

E-Print Network [OSTI]

Bryant fall 2010 FC fall 2010a Bryant Unive rsity resoU rce fo r P ro fessional sUccess P H I L A NWard BY giVing BaCK Alumni and friends share their inspiration for giving to the next cohort of Bryant the University by investing in the future of the accounting industry. 22 tHe BrYant LeadersHiP COUnCiL Bryant

Blais, Brian

173

The tip of the iceberg: the frequency content of the Delta Sct star HD 50844 from CoRoT space photometry  

E-Print Network [OSTI]

It has been suggested that the detection of a wealth of very low amplitude modes in Delta Sct stars was only a matter of signal--to--noise ratio. Access to this treasure, impossible from the ground, is one of the scientific aims of the space mission CoRoT, developed and operated by CNES. This work presents the results obtained on HD 50844: the 140,016 datapoints allowed us to reach the level of 10^{-5} mag in the amplitude spectra. The frequency analysis of the CoRoT timeseries revealed hundreds of terms in the frequency range 0--30 d^{-1}. The initial guess that Delta Sct stars have a very rich frequency content is confirmed. The spectroscopic mode identification gives theoretical support since very high--degree modes (up to ell=14) are identified. We also prove that cancellation effects are not sufficient in removing the flux variations associated to these modes at the noise level of the CoRoT measurements. The ground--based observations indicate that HD 50844 is an evolved star that is slightly underabunda...

Poretti, E; Rainer, M; Uytterhoeven, K; Michel, E; Baglin, A; Auvergne, M; Catala, C; Samadi, R; Rodrguez, E; Garrido, R; Amado, P; Martin-Ruiz, S; Moya, A; Suarez, C; Baudin, F; Zima, W; Alvarez, M; Mathias, P; Paparo, M; Papics, P; Plachy, E

2009-01-01T23:59:59.000Z

174

CE 363 -TRANSPORTATION ENGINEERING AND PAVEMENT DESIGN Fall 2009 Course Syllabus  

E-Print Network [OSTI]

1 CE 363 - TRANSPORTATION ENGINEERING AND PAVEMENT DESIGN Fall 2009 Course Syllabus Catalog (4) CDT Course Syllabus D2L: The primary source for homework, solutions, design project activities, and other

Hickman, Mark

175

Pressure tuning of competing magnetic interactions in intermetallic CeFe2  

SciTech Connect (OSTI)

We use high-pressure magnetic x-ray diffraction and numerical simulation to determine the low-temperature magnetic phase diagram of stoichiometric CeFe2. Near 1.5 GPa we find a transition from ferromagnetism to antiferromagnetism, accompanied by a rhombohedral distortion of the cubic Laves crystal lattice. By comparing pressure and chemical substitution we find that the phase transition is controlled by a shift of magnetic frustration from the Ce-Ce to the Fe-Fe sublattice. Notably the dominant Ce-Fe magnetic interaction, which sets the temperature scale for the onset of long-range order, remains satisfied throughout the phase diagram but does not determine the magnetic ground state. Our results illustrate the complexity of a system with multiple competing magnetic energy scales and lead to a general model for magnetism in cubic Laves phase intermetallic compounds.

Wang, Jiyang; Feng, Yejun; Jaramillo, R.; van Wezel, Jasper; Canfield, Paul C.; Rosenbaum, T.F.

2012-07-20T23:59:59.000Z

177

Ion-Beam-Induced Chemical Mixing at a Nanocrystalline CeO2&ndash...  

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

microscopy imaging and analysis suggest that this band of contrast is a cerium silicate phase with an approximate Ce:Si:O composition ratio of 1:1:3 in an amorphous nature....

178

Data:B084b37a-3e1c-482d-8041-d7ce3e7aa0ce | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2 No revision has38865d08 No revision has been approved for this page.af74fa257cc No54a9102ce3e7aa0ce No

179

Data:Ce82df4d-c557-42d2-a1f3-ce3b159222ae | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revisionde0244033 No revisiona1f3-ce3b159222ae

180

Electronic structure and f-orbital occupancy in Yb-substituted CeCoIn5  

SciTech Connect (OSTI)

The local structure and 4f orbital occupancy have been investigated in Ce{sub 1?x}Yb{sub x}CoIn{sub 5} via Yb L{sub III}-edge extended x-ray absorption fine structure (EXAFS), Ce and Yb L{sub III}-edge x-ray absorption near-edge structure (XANES), and angle-resolved photoemission spectroscopy (ARPES) measurements. Yb(III) (4f{sup 13}) is the hole analog of Ce(III) (4f{sup 1}). Yb is found to be strongly intermediate-valent in Ce{sub 1?x}Yb{sub x}CoIn{sub 5} throughout the entire doping range, including pure YbCoIn{sub 5}, with an f-hole occupancy for Yb of n{sub f} ? 0.3 (i.e. Yb{sup 2.3+}), independent of Yb concentration and independent of temperature down to T = 20 K. In contrast, the f-electron orbital occupancy for Ce remains close to 1 for all Yb concentrations, suggesting that there is no mutual influence on n{sub f} between neighboring Ce and Yb sites. Likewise, ARPES measurements at 12 K have found that the electronic structure along {Gamma} ? X is not sensitive to the Yb substitution, suggesting that the Kondo hybridization of Ce f electrons with the conduction band is not affected by the presence of Yb impurities in the lattice. The emerging picture is that in Ce{sub 1?x}Yb{sub x}CoIn{sub 5} there are two networks, interlaced but independent, that couple to the conduction band: one network of Ce ions in the heavy-fermion limit, one network of Yb ions in the strongly intermediate-valent limit. The robustness of the local and electronic structure to doping suggests the absence of charge transfer between the Ce and Yb ions, and may explain the relative robustness of superconductivity for this Ce-site substitution as compared to the In-site substitution.

Booth, C. H.; Durakiewicz, T.; Capan, C.; Hurt, D.; Bianchi, A. D.; Joyce, J.J.; Fisk, Z.

2011-05-03T23:59:59.000Z

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


181

582014-15 Suggested Course Plan CompuTeR sCIenCe  

E-Print Network [OSTI]

Algebra & Diff. Equations EE 364: Intro to Probability & Statistics or mATh 407: Probability Theory sCIenCe582014-15 Suggested Course Plan CompuTeR sCIenCe FIRST YEAR FALL: 16 units SPRING: 16 units SECOND104L,170 4 BASIC SCIENCE I 4 TECH. ELECTIVE I 4 TECH. ELECTIVE II 4 EE 364 MATH225or245 or MATH 407

Zhou, Chongwu

182

CeO2 and CuOx Interactions and the Controlled Assembly of CeO2(111) and CeO2(100) Nanoparticles on an Oxidized Cu(111)Substrate  

SciTech Connect (OSTI)

The catalytic performance of ceria-based heterogeneous catalysts in many chemical transformations (water-gas shift reaction, CO oxidation, alcohol synthesis from CO/CO{sub 2} hydrogenation, etc.) is affected by the surface structure of the ceria. To control the performance of ceria-containing inverse catalysts, we devised a method to grow ceria nanoparticles (NPs) exposing exclusively either (111) or (100) surfaces and characterized their surface structures by scanning tunneling microscopy. When cerium is vapor-deposited on Cu(111) in a background of molecular O{sub 2}, only CeO{sub 2}(111) NPs grow. However, if the surface of Cu(111) is preoxidized with O{sub 2} or NO{sub 2} to form a rectangular copper oxide phase, probably Cu{sub 4}O{sub 3}(001), CeO{sub 2}(100) NPs grow on the oxide template instead. These experimental findings are interpreted using results of density functional calculations. The (100) surface of bulk ceria reconstructs to preserve charge neutrality. This is not necessary for CeO{sub 2}(100) NPs grown on Cu{sub 4}O{sub 3}(001), where the topmost oxygen layer of Cu{sub 4}O{sub 3} is shared with the interfacial layer of cerium. After the CeO{sub 2}(100)/CuO{sub x}/Cu(111) surfaces were exposed to CO, the copper oxide was reduced but the shape of the CeO{sub 2}(100) NPs remained intact. This opens the door for diverse applications in catalysis.

Rodriguez J. A.; Yang F.; Choi Y.M.; Agnoli S.; Liu P.; Stacchiola D.; Hrbek J.

2011-11-24T23:59:59.000Z

183

Comparison of Hydrodynamic Load Predictions Between Engineering Models and Computational Fluid Dynamics for the OC4-DeepCwind Semi-Submersible: Preprint  

SciTech Connect (OSTI)

Hydrodynamic loads on the platforms of floating offshore wind turbines are often predicted with computer-aided engineering tools that employ Morison's equation and/or potential-flow theory. This work compares results from one such tool, FAST, NREL's wind turbine computer-aided engineering tool, and the computational fluid dynamics package, OpenFOAM, for the OC4-DeepCwind semi-submersible analyzed in the International Energy Agency Wind Task 30 project. Load predictions from HydroDyn, the offshore hydrodynamics module of FAST, are compared with high-fidelity results from OpenFOAM. HydroDyn uses a combination of Morison's equations and potential flow to predict the hydrodynamic forces on the structure. The implications of the assumptions in HydroDyn are evaluated based on this code-to-code comparison.

Benitz, M. A.; Schmidt, D. P.; Lackner, M. A.; Stewart, G. M.; Jonkman, J.; Robertson, A.

2014-09-01T23:59:59.000Z

184

New orthorhombic derivative of CaCu{sub 5}-type structure: RNi{sub 4}Si compounds (R=Y, La, Ce, Sm, GdHo), crystal structure and some magnetic properties  

SciTech Connect (OSTI)

The crystal structure of new YNi{sub 4}Si-type RNi{sub 4}Si (R=Y, La, Ce, Sm, GdHo) compounds has been established using powder X-ray diffraction. The YNi{sub 4}Si structure is a new structure type, which is orthorhombic derivative of CaCu{sub 5}-type structure (space group Cmmm N 65, oC12). GdNi{sub 4}Si and DyNi{sub 4}Si compounds order ferromagnetically at 25 and 19 K, respectively whereas YNi{sub 4}Si shows antiferromagnetic nature. At 15 K, DyNi{sub 4}Si shows second antiferromagnetic-like transition. The magnetic moment of GdNi{sub 4}Si at 5 K in 50 kOe field is ?7.2 ?{sub B}/f.u. suggesting a completely ordered ferromagnetic state. The magnetocaloric effect of GdNi{sub 4}Si is calculated in terms of isothermal magnetic entropy change and it reaches the maximum value of ?12.8 J/kg K for a field change of 50 kOe near T{sub C} ?25 K. - Graphical abstract: The RNi{sub 4}Si (R=Y, La, Ce, Sm, GdHo) compounds crystallize in new YNi{sub 4}Si-type structure which is orthorhombic derivative of the basic CaCu{sub 5}-type structure. GdNi{sub 4}Si and DyNi{sub 4}Si compounds show the ferromagnetic-like ordering, whereas.YNi{sub 4}Si has the antiferromagnetic nature. The GdNi{sub 4}Si demonstrates the big magnetocaloric effect near temperature of ferromagnetic ordering. The relationship between initial CaCu{sub 5}-type DyNi{sub 5} and YNi{sub 4}Si-type DyNi{sub 4}Si lattices.

Morozkin, A.V., E-mail: morozkin@general.chem.msu.ru [Department of Chemistry, Moscow State University, Leninskie Gory, House 1, Building 3, GSP-2, Moscow 119992 (Russian Federation); Knotko, A.V. [Department of Chemistry, Moscow State University, Leninskie Gory, House 1, Building 3, GSP-2, Moscow 119992 (Russian Federation); Yapaskurt, V.O. [Department of Petrology, Geological Faculty, Moscow State University, Leninskie Gory, Moscow 119992 (Russian Federation); Yuan, Fang; Mozharivskyj, Y. [Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4M1 (Canada); Nirmala, R. [Indian Institute of Technology Madras, Chennai 600036 (India)

2013-12-15T23:59:59.000Z

185

Enhanced oxygen storage capacity of Ce{sub 0.88}Mn{sub 0.12}O{sub y} compared to CeO{sub 2}: An experimental and theoretical investigation  

SciTech Connect (OSTI)

Graphical abstract: Display Omitted Highlights: ? Ce{sub 0.88}Mn{sub 0.12}O{sub y} and CeO{sub 2} hollow nanospheres were successfully prepared via a supercritical antisolvent process. ? Compared with the pure CeO{sub 2}, the Ce{sub 0.88}Mn{sub 0.12}O{sub y} has nearly the same surface area but more oxygen vacancies. ? DFT calculations shows that the surface oxygen of the CeO{sub 2} gets activated after doping Mn. -- Abstract: Ce{sub 0.88}Mn{sub 0.12}O{sub y} and CeO{sub 2} nanoparticles have been successfully prepared via a supercritical antisolvent process. High-resolution transmission electron microscopy displays the hollow and spherical structures of these nanoparticles. X-ray diffraction analysis demonstrates the formation of Ce{sub 0.88}Mn{sub 0.12}O{sub y} solid solution. N{sub 2} adsorption reveals that the Ce{sub 0.88}Mn{sub 0.12}O{sub y} has nearly the same surface area with the CeO{sub 2}. It is shown that the Ce{sub 0.88}Mn{sub 0.12}O{sub y} has higher oxygen storage capacity (OSC) than the CeO{sub 2}. To understand the mechanism of the improved OSC of the Mn doped CeO{sub 2}, Raman spectroscopy, X-ray photoelectron spectra and density functional theoretical (DFT) calculations have been performed. It is found that the Ce{sub 0.88}Mn{sub 0.12}O{sub y} presents more oxygen vacancies, indicating the easier of oxygen mobility from bulk to surface. DFT calculations reveal that structural and electronic modifications are caused by the incorporation of Mn in the CeO{sub 2}, resulting in activated oxygen species. The oxygen vacancy formation energy is lowered by the Mn doping. These changes are responsible for the enhanced OSC of the Ce{sub 0.88}Mn{sub 0.12}O{sub y}.

Zhang, Minhua; Jiang, Dongyu [Key Laboratory for Green Chemical Technology of Ministry of Education, R and D Center for Petrochemical Technology, Tianjin University, Tianjin 300072 (China)] [Key Laboratory for Green Chemical Technology of Ministry of Education, R and D Center for Petrochemical Technology, Tianjin University, Tianjin 300072 (China); Jiang, Haoxi, E-mail: hxjiang@tju.edu.cn [Key Laboratory for Green Chemical Technology of Ministry of Education, R and D Center for Petrochemical Technology, Tianjin University, Tianjin 300072 (China)] [Key Laboratory for Green Chemical Technology of Ministry of Education, R and D Center for Petrochemical Technology, Tianjin University, Tianjin 300072 (China)

2012-12-15T23:59:59.000Z

186

Proactive Design of n-Type (In, Ce) Filled Skutterudites Enabling High-Temperature Waste Heat Recovery  

Broader source: Energy.gov [DOE]

Thermoelectric and structural properties of n-type (In, Ce) filled skutterudites including power factors and ZT as a function of temperature are presented

187

Variability in the CoRoT photometry of three hot O-type stars. HD 46223, HD 46150 and HD 46966  

E-Print Network [OSTI]

The detection of pulsational frequencies in stellar photometry is required as input for asteroseismological modelling. The second short run (SRa02) of the CoRoT mission has provided photometric data of unprecedented quality and time-coverage for a number of O-type stars. We analyse the CoRoT data corresponding to three hot O-type stars, describing the properties of their light curves and we search for pulsational frequencies, which we then compare to theoretical model predictions. We determine the amplitude spectrum of the data, using the Lomb-Scargle and a multifrequency HMM-like technique. Frequencies are extracted by prewhitening, and their significance is evaluated under the assumption that the light curve is dominated by red noise. We search for harmonics, linear combinations and regular spacings among these frequencies. We use simulations with the same time sampling as the data as a powerful tool to judge the significance of our results. From the theoretical point of view, we use the MAD non-adiabatic p...

Blomme, R; Catala, C; Cuypers, J; Gosset, E; Godart, M; Montalban, J; Ventura, P; Rauw, G; Morel, T; Degroote, P; Aerts, C; Noels, A; Michel, E; Baudin, F; Baglin, A; Auvergne, M; Samadi, R

2011-01-01T23:59:59.000Z

188

An in-depth study of HD 174966 with CoRoT photometry and HARPS spectroscopy. Large separation as a new observable for \\delta Sct stars  

E-Print Network [OSTI]

The aim of this work was to use a multi-approach technique to derive the most accurate values possible of the physical parameters of the \\delta Sct star HD174966. In addition, we searched for a periodic pattern in the frequency spectra with the goal of using it to determine the mean density of the star. First, we extracted the frequency content from the CoRoT light curve. Then, we derived the physical parameters of HD174966 and carried a mode identification out from the spectroscopic and photometric observations. We used this information to look for the models fulfilling all the conditions and discussed the inaccuracies of the method because of the rotation effects. In a final step, we searched for patterns in the frequency set using a Fourier transform, discussed its origin and studied the possibility of using the periodicity to obtain information about the physical parameters of the star. A total of 185 peaks were obtained from the Fourier analysis of the CoRoT light curve, being almost all reliable pulsati...

Hernndez, A Garca; Michel, E; Surez, J C; Poretti, E; Martn-Ruz, S; Amado, P J; Garrido, R; Rodrguez, E; Rainer, M; Uytterhoeven, K; Rodrigo, C; Solano, E; Rodn, J R; Mathias, P; Rolland, A; Auvergne, M; Baglin, A; Baudin, F; Catala, C; Samadi, R

2013-01-01T23:59:59.000Z

189

Infrared spectra and tunneling dynamics of the N{sub 2}D{sub 2}O and OCD{sub 2}O complexes in the v{sub 2} bend region of D{sub 2}O  

SciTech Connect (OSTI)

The rovibrational spectra of the N{sub 2}D{sub 2}O and OCD{sub 2}O complexes in the v{sub 2} bend region of D{sub 2}O have been measured in a supersonic slit jet expansion using a rapid-scan tunable diode laser spectrometer. Both a-type and b-type transitions were observed for these two complexes. All transitions are doubled, due to the heavy water tunneling within the complexes. Assuming the tunneling splittings are the same in K{sub a} = 0 and K{sub a} = 1, the band origins, all three rotational and several distortion constants of each tunneling state were determined for N{sub 2}D{sub 2}O in the ground and excited vibrational states, and for OCD{sub 2}O in the excited vibrational state, respectively. The averaged band origin of OCD{sub 2}O is blueshifted by 2.241 cm{sup ?1} from that of the v{sub 2} band of the D{sub 2}O monomer, compared with 1.247 cm{sup ?1} for N{sub 2}D{sub 2}O. The tunneling splitting of N{sub 2}D{sub 2}O in the ground state is 0.16359(28) cm{sup ?1}, which is about five times that of OCD{sub 2}O. The tunneling splittings decrease by about 26% for N{sub 2}D{sub 2}O and 23% for OCD{sub 2}O, respectively, upon excitation of the D{sub 2}O bending vibration, indicating an increase of the tunneling barrier in the excited vibrational state. The tunneling splittings are found to have a strong dependence on intramolecular vibrational excitation as well as a weak dependence on quantum number K{sub a}.

Zhu, Yu; Zheng, Rui; Li, Song; Yang, Yu; Duan, Chuanxi, E-mail: cxduan@phy.ccnu.edu.cn [College of Physical Science and Technology, Central China Normal University, Wuhan 430079 (China)] [College of Physical Science and Technology, Central China Normal University, Wuhan 430079 (China)

2013-12-07T23:59:59.000Z

190

Mechanism of Methane Chemical Looping Combustion with Hematite Promoted with CeO2  

SciTech Connect (OSTI)

Chemical looping combustion (CLC) is a promising technology for fossil fuel combustion that produces sequestration-ready CO{sub 2} stream, reducing the energy penalty of CO{sub 2} separation from flue gases. An effective oxygen carrier for CLC will readily react with the fuel gas and will be reoxidized upon contact with oxygen. This study investigated the development of a CeO{sub 2}-promoted Fe{sub 2}O{sub 3}?hematite oxygen carrier suitable for the methane CLC process. Composition of CeO{sub 2} is between 5 and 25 wt % and is lower than what is generally used for supports in Fe{sub 2}O{sub 3} carrier preparations. The incorporation of CeO{sub 2} to the natural ore hematite strongly modifies the reduction behavior in comparison to that of CeO{sub 2} and hematite alone. Temperature-programmed reaction studies revealed that the addition of even 5 wt % CeO{sub 2} enhances the reaction capacity of the Fe{sub 2}O{sub 3} oxygen carrier by promoting the decomposition and partial oxidation of methane. Fixed-bed reactor data showed that the 5 wt % cerium oxides with 95 wt % iron oxide produce 2 times as much carbon dioxide in comparison to the sum of carbon dioxide produced when the oxides were tested separately. This effect is likely due to the reaction of CeO{sub 2} with methane forming intermediates, which are reactive for extracting oxygen from Fe{sub 2}O{sub 3} at a considerably faster rate than the rate of the direct reaction of Fe{sub 2}O{sub 3} with methane. These studies reveal that 5 wt % CeO{sub 2}/Fe{sub 2}O{sub 3} gives stable conversions over 15 reduction/oxidation cycles. Lab-scale reactor studies (pulsed mode) suggest the methane reacts initially with CeO{sub 2} lattice oxygen to form partial oxidation products (CO + H{sub 2}), which continue to react with oxygen from neighboring Fe{sub 2}O{sub 3}, leading to its complete oxidation to form CO{sub 2}. The reduced cerium oxide promotes the methane decomposition reaction to form C + H{sub 2}, which continue to react with Fe{sub 2}O{sub 3}/Fe{sub 3}O{sub 4} to form CO/CO{sub 2} and H{sub 2}O. This mechanism is supported by the characterization studies, which also suggest that the formation of carbonaceous intermediates may affect the reaction rate and selectivity of the oxygen carrier.

Miller, Duane D.; Siriwardane, Ranjani

2013-08-01T23:59:59.000Z

191

DFT+U Study of CeO2 and Its Native Defects  

E-Print Network [OSTI]

in solid state fuel cells2, as a catalyst3-6, as a high-dielectric constant gate oxide7, and in resistance random access memories (ReRAM)8. Many properties of CeO2 are determined by its intrinsic defects9-23 and the unusual behavior of the semi-core Ce 4f... averaging scheme46 for spin- orbital coupling effect. The RRKJ method is chosen as optimization of pseudopotentials47. The PBE functional was chosen for PBE+U calculations with a kinetic cutoff energy of 750eV, which expands the valence electrons states...

Huang, Bolong; Gillen, Roland; Robertson, John

2014-10-14T23:59:59.000Z

192

Comparative Study on Redox Properties of Nanosized CeO2 and CuO/Ce2 Under CO/O2  

SciTech Connect (OSTI)

Nanosized CeO{sub 2} and CuO/CeO{sub 2} samples, active for CO-PROX or related processes were comparatively examined by O{sub 2} probe electron paramagnetic resonance and in situ Raman and X-ray diffraction techniques. Their behavior toward CO reduction, as well as the oxygen-handling properties of the CO-reduced samples, was explored. An appreciable reduction of the ceria bulk was detected on treatment under CO at 473 K. On the basis of the analysis of the evolution of different oxygen-derived species (superoxide, peroxide, O-) on low-temperature (77-300 K) oxygen chemisorption on the CO-reduced samples, a general picture of the redox properties of the samples is presented. Results demonstrate that the presence of copper promotes completion of the redox cycle under CO/O{sub 2} by favoring both ceria reduction and oxidation. This can be relevant to explaining the remarkable oxidation activity and synergetic effects observed for catalysts combining CuO and CeO{sub 2}.

Martinez-Arias,A.; Gamarra, D.; Fernandez-Garcia, M.; Wang, X.; Hanson, J.; Rodriguez, J.

2006-01-01T23:59:59.000Z

193

Observation of Strong Resonant Behavior in the Inverse Photoelectron Spectroscopy of Ce Oxide  

SciTech Connect (OSTI)

X-ray Emission Spectroscopy (XES) and Resonant Inverse Photoelectron Spectroscopy (RIPES) have been used to investigate the photon emission associated with the Ce3d5/2 and Ce3d3/2 thresholds. Strong resonant behavior has been observed in the RIPES of Ce Oxide near the 5/2 and 3/2 edges. Inverse Photoelectron Spectroscopy (IPES) and its high energy variant, Bremstrahlung Isochromat Spectroscopy (BIS), are powerful techniques that permit a direct interrogation of the low-lying unoccupied electronic structure of a variety of materials. Despite being handicapped by counting rates that are approximately four orders of magnitude less that the corresponding electron spectroscopies (Photoelectron Spectroscopy, PES, and X-ray Photoelectron Spectroscopy, XPS) both IPES and BIS have a long history of important contributions. Over time, an additional variant of this technique has appeared, where the kinetic energy (KE) of the incoming electron and photon energy (hv) of the emitted electron are roughly the same magnitude as the binding energy of a core level of the material in question. Under these circumstances and in analogy to Resonant Photoelectron Spectroscopy, a cross section resonance can occur, giving rise to Resonant Inverse Photoelectron Spectroscopy or RIPES. Here, we report the observation of RIPES in an f electron system, specifically the at the 3d{sub 5/2} and 3d{sub 3/2} thresholds of Ce Oxide. The resonant behavior of the Ce4f structure at the 3d thresholds has been addressed before, including studies of the utilization of the technique as a probe of electron correlation in a variety of Ce compounds. Interestingly, the first RIPES work on rare earths dates back to 1974, although under conditions which left the state of the surface and near surface regions undefined. Although they did not use the more modern terminology of 'RIPES,' it is clear that RIPES was actually first performed in 1974 by Liefeld, Burr and Chamberlain on both La and Ce based materials. In these experiments, the La and Ce metallic samples were attached to the anode of an x-ray tube and the x-ray emission characteristics were measured using a two crystal monochromator. The pressure in the x-ray tube was quoted as being below 2 x 10{sup -8} Torr. They did indeed observed resonant behavior at the M{alpha} (3d{sub 5/2}) and M{beta} (3d{sub 3/2}) thresholds. In fact, our results here will confirm the measurements made upon the Ce based sample used in by Liefeld et al. However, the state of the Ce sample surface and near surface regions are quite undefined in the study in Ref 9. For example, the authors suggest that they are probing Ce metal, since they cannot see any evidence of an OK{alpha} (1s) XES line. However, they do report the observation of FK{alpha} (1s) line, possibly due to the utilization of cerium fluoride in the sample preparation. Later, they tried to address these issues in a new ultrahigh vacuum system. Based upon our results, it is clear that their original sample surface was oxidized, using the word here in its more general context as in having lost electrons to the oxidizing agent, although whether the structure is an oxide or fluoride remains unclear. In any case, the primacy of Liefeld and coworkers in these measurements should be noted. Cerium and cerium oxide have been studied with a variety of spectroscopic techniques under UHV conditions. This includes Bremstrahlung Isochromat Spectroscopy or BIS, Photoelectron Spectroscopy, X-ray Absorption Spectroscopy, Electron Energy Loss Spectroscopy and Resonant XES, to name just a few. We will compare our results to those of other spectroscopies.

Tobin, J G; Yu, S W; Chung, B W; Waddill, G D; Damian, E; Duda, L; Nordgren, J

2009-12-15T23:59:59.000Z

194

Overseas Affairs and Planning Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University  

E-Print Network [OSTI]

Contact: Overseas Affairs and Planning Institute for Integrated Cell-Material Sciences (i Cell-Material Sciences, iCeMS for short, I welcome you to the Seventh iCeMS International Symposium to develop them through evolution. They are also very important to design and create various novel "smart

Takada, Shoji

195

OC_IC_DIGITAL.indd  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas Conchas recoveryLaboratory | NationalJohnSecurityControls |NavyNuclearLife Users EnergyISSN

196

Laser Surface Modification of a Crystalline Al-Co-Ce Alloy for Enhanced Corrosion  

E-Print Network [OSTI]

#12;Laser Surface Modification of a Crystalline Al-Co-Ce Alloy for Enhanced Corrosion Resistance hardness, structure manipula- tion, and improvements in corrosion resistance of metallic materials.[1 surface modify steel and aluminum alloys for improved corrosion resistance.[3,4] The enhanced corrosion

Fitz-Gerald, James M.

197

Logiciel de Gestion de Version Qu'est-ce qu'un Version Control System (VCS) ?  

E-Print Network [OSTI]

Logiciel de Gestion de Version Git Qu'est-ce qu'un Version Control System (VCS) ? Appel galement Logiciel de Gestion de Rvision (RCS), un VCS est un outil qui permet de : de suivre l'volution d revenir en arrire en cas de problme ; de retenir qui a effectu chaque modification de chaque fichier

Tichit, Laurent

198

CeSOS Highlights and AMOS Visions 27-29th May 2013 Aurlien Babarit  

E-Print Network [OSTI]

2013 Criteria for comparison > The true criterion is cost of kWh. > kWh (power production) can absorption Income side of COE The higher the power absorption per unit, the less the installation cost a limit to the allowed cost for viability #12;A. Babarit CeSOS Highlights and AMOS Visions 27-29th May

Nrvg, Kjetil

199

COMMENT LES NANOTUBES DE CARBONE INTERAGISSENT AVEC LES MACROPHAGES : CE QUE NOUS DIT LA MICROFLUORESCENCE X  

E-Print Network [OSTI]

COMMENT LES NANOTUBES DE CARBONE INTERAGISSENT AVEC LES MACROPHAGES : CE QUE NOUS DIT LA. Boczkowski (INSERM). Réf. : Nano Lett. 8 (9), 2659-2663 (2008). Les nanotubes de carbone présentent des utilisée jusqu'alors pour étudier des nanotubes de carbone. Nous avons choisi d'étudier différentes sortes

Paris-Sud 11, Université de

200

In situ corrosion analysis of Al-Zn-In-Mg-Ti-Ce sacrificial anode alloy  

SciTech Connect (OSTI)

The corrosion behaviour of Al-5Zn-0.02In-1Mg-0.05Ti-0.5Ce (wt.%) alloy has been investigated by immersion test, scanning electron microscopy, energy dispersive X-ray detector, electrochemical impedance spectroscopy and electrochemical noise. The results show that there exist different corrosion types of the alloy in 3.5% NaCl solution with the immersion time. At the initial stage of immersion, pitting due to the precipitates predominates the corrosion with a typical inductive loop at low frequencies in electrochemical impedance spectroscopy. The major precipitates of the alloy are MgZn{sub 2} and Al{sub 2}CeZn{sub 2} particles. The corrosion potentials of the bulk MgZn{sub 2} and Al{sub 2}CeZn{sub 2} alloys are negative with respect to that of {alpha}-Al, so the MgZn{sub 2} and Al{sub 2}CeZn{sub 2} precipitates can act as activation centre and cause the pitting. In the late corrosion, a relative uniform corrosion predominates the corrosion process controlled by the dissolution/precipitation of the In ions and characterized by a capacitive loop at medium-high frequencies in electrochemical impedance spectroscopy. The potential noise of the pitting shows larger amplitude fluctuation and lower frequency, but the potential noise of the uniform corrosion occurs with smaller amplitude fluctuation and higher frequency.

Ma Jingling, E-mail: majingling.student@sina.com; Wen Jiuba; Zhai Wenxia; Li Quanan

2012-03-15T23:59:59.000Z

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


201

The CompuTer SCienCe program The bachelor of science degree in computer science  

E-Print Network [OSTI]

The CompuTer SCienCe program The bachelor of science degree in computer science offered by the Watson School is accredited by the Computing Accreditation Commission of ABET Inc. (mailing address: 111 in the fundamentals of computer science, elements of practical application and an appreciation for liberal learning

Suzuki, Masatsugu

202

Energy Based Methods in Wind Turbine Control CeSOS Highlights and AMOS Visions  

E-Print Network [OSTI]

Energy Based Methods in Wind Turbine Control CeSOS Highlights and AMOS Visions Morten D. Pedersen 1 / 26 #12;This talk 1 Background 2 Understanding the Wind Turbine 3 Nonlinear Turbine Modeling 4;Background The Problem Previously stable wind turbine systems began exhibiting resonant behavior when put

Nørvåg, Kjetil

203

CE990 Graduate Seminar Presentations The presentation materials shown in this file were prepared by graduate  

E-Print Network [OSTI]

cord · 10% fabric 4 #12;Thermal ConductivityThermal Conductivity · Low thermal conductivity of 0.242W conventional aggregatesconventional aggregates 5 #12;Thermal ConductivityThermal Conductivity ··Shredded tireCE990 Graduate Seminar Presentations DISCLAIMER The presentation materials shown in this file were

Saskatchewan, University of

204

Author's personal copy Prepration and photoluminescence properties of Ce doped lutetium silicate  

E-Print Network [OSTI]

Author's personal copy Prepration and photoluminescence properties of Ce doped lutetium silicate silicate Cerium Solegel Photoluminescence Lu2SiO5 a b s t r a c t Cerium doped lutetium silicate powders%). The synthesized lutetium silicate powders were investigated by X-ray diffraction (XRD), TG-DTA, SEM

Cao, Guozhong

205

Unusual Physical and Chemical Properties of Cu in Ce1-xCuxO2 Oxides  

SciTech Connect (OSTI)

The structural and electronic properties of Ce{sub 1-x}Cu{sub x}O{sub 2} nano systems prepared by a reverse microemulsion method were characterized with synchrotron-based X-ray diffraction, X-ray absorption spectroscopy, Raman spectroscopy, and density functional calculations. The Cu atoms embedded in ceria had an oxidation state higher than those of the cations in Cu{sub 2}O or CuO. The lattice of the Ce{sub 1-x}Cu{sub x}O{sub 2} systems still adopted a fluorite-type structure, but it was highly distorted with multiple cation-oxygen distances with respect to the single cation-oxygen bond distance seen in pure ceria. The doping of CeO{sub 2} with copper introduced a large strain into the oxide lattice and favored the formation of O vacancies, leading to a Ce{sub 1-x}Cu{sub x}O{sub 2-y} stoichiometry for our materials. Cu approached the planar geometry characteristic of Cu(II) oxides, but with a strongly perturbed local order. The chemical activities of the Ce{sub 1-x}Cu{sub x}O{sub 2} nanoparticles were tested using the reactions with H2 and O2 as probes. During the reduction in hydrogen, an induction time was observed and became shorter after raising the reaction temperature. The fraction of copper that could be reduced in the Ce{sub 1-x}Cu{sub x}O{sub 2} oxides also depended strongly on the reaction temperature. A comparison with data for the reduction of pure copper oxides indicated that the copper embedded in ceria was much more difficult to reduce. The reduction of the Ce{sub 1-x}Cu{sub x}O{sub 2} nanoparticles was rather reversible, without the generation of a significant amount of CuO or Cu{sub 2}O phases during reoxidation. This reversible process demonstrates the unusual structural and chemical properties of the Cu-doped ceria materials.

Wang,X.; Rodriguez, J.; Hanson, J.; Gamarra, D.; Martinez-Arias, A.; Fernandez-Garcia, M.

2005-01-01T23:59:59.000Z

206

Phase relations and crystal structures in the system Ce-Ni-Zn at 800 Degree-Sign C  

SciTech Connect (OSTI)

Phase relations have been established for the system Ce-Ni-Zn in the isothermal section at 800 Degree-Sign C using electron microprobe analysis and X-ray powder diffraction. Phase equilibria at 800 Degree-Sign C are characterized by a large region for the liquid phase covering most of the Ce-rich part of the diagram, whereas a Zn-rich liquid is confined to a small region near the Zn-corner of the Gibbs triangle. Whereas solubility of Ce in the binary Ni-Zn phases is negligible, mutual solubilities of Ni and Zn at a constant Ce content are large at 800 Degree-Sign C for most Ce-Zn and Ce-Ni compounds. The solid solution Ce(Ni{sub 1-x}Zn{sub x}){sub 5} with the CaCu{sub 5}-type is continuous throughout the entire section and for the full temperature region from 400 to 800 Degree-Sign C. Substitution of Zn by Ni is found to stabilize the structure of CeZn{sub 11} to higher temperatures. At 800 Degree-Sign C Ce(Ni{sub x}Zn{sub 1-x}){sub 11} (0.03{<=}x{<=}0.22) appears as a ternary solution phase. Similarly, a rather extended solution forms for Ce{sub 2}(Ni{sub x}Zn{sub 1-x}){sub 17} (0{<=}x{<=}0.53). Detailed data on atom site occupation and atom parameters were derived from X-ray structure analyses for single crystals of Ce{sub 2+y}(Ni{sub x}Zn{sub 1-x}){sub 17}, y=0.02, x=0.49 (a=0.87541(3), c=1.25410(4) nm; Th{sub 2}Zn{sub 17} type with space group R3{sup Macron }m,R{sub F{sup 2}}=0.018) and Ce(Ni{sub 0.18}Zn{sub 0.82}){sub 11} (a=1.04302(2), c=0.67624(3)nm, BaCd{sub 11} type with space group I4{sub 1}/amd, R{sub F{sup 2}}=0.049). - Graphical abstract: Ce-Ni-Zn isothermal section at 800 Degree-Sign C. Highlights: Black-Right-Pointing-Pointer Phase relations were determined for the system Ce-Ni-Zn in the section at 800 Degree-Sign C. Black-Right-Pointing-Pointer A continuous solid solution Ce(Ni{sub 1-x}Zn{sub x}){sub 5}, 0{<=}x{<=}1, forms between 400 and 800 Degree-Sign C. Black-Right-Pointing-Pointer Zn/Ni substitution stabilizes the ternary phase Ce(Zn{sub 1-x}Ni{sub x}){sub 11}, 0.03{<=}x{<=}0.22, 800 Degree-Sign C. Black-Right-Pointing-Pointer An extended solution forms for Ce{sub 2}(Ni{sub x}Zn{sub 1-x}){sub 17} (0{<=}x{<=}0.53). Black-Right-Pointing-Pointer Crystal data are given: Ce{sub 2+y}(Ni{sub x}Zn{sub 1-x}){sub 17} (Th{sub 2}Zn{sub 17}), Ce(Ni{sub 0.18}Zn{sub 0.82}){sub 11} (BaCd{sub 11}).

Malik, Z.; Grytsiv, A. [Institute of Physical Chemistry, University of Vienna, Waehringerstrasse 42, A-1090 Vienna (Austria)] [Institute of Physical Chemistry, University of Vienna, Waehringerstrasse 42, A-1090 Vienna (Austria); Rogl, P., E-mail: peter.franz.rogl@univie.ac.at [Institute of Physical Chemistry, University of Vienna, Waehringerstrasse 42, A-1090 Vienna (Austria); Giester, G. [Institute of Mineralogy and Crystallography, University of Vienna, Althanstrasse 14, A-1090 Vienna (Austria)] [Institute of Mineralogy and Crystallography, University of Vienna, Althanstrasse 14, A-1090 Vienna (Austria)

2012-10-15T23:59:59.000Z

207

Size Effect on Nuclear Gamma-Ray Energy Spectra Acquired by Different Sized CeBr3, LaBr3:Ce, and NaI:Tl Gamma-Ray Detectors  

SciTech Connect (OSTI)

Gamma-ray energy spectra were acquired for different sizes of cerium tribromide (CeBr3), cerium-doped lanthanum tribromide (LaBr3:Ce), and thallium-doped sodium iodide (NaI:Tl) detectors. A comparison was conducted of the energy resolution and detection efficiency of these scintillator detectors for different sizes of detectors. The results of this study are consistent with the observation that for each size detector, LaBr3:Ce offers better resolution than either a CeBr3 or NaI:Tl detector of the same size. In addition, CeBr3 and LaBr3:Ce detectors could resolve some closely spaced peaks in the spectra of several radioisotopes that NaI:Tl could not. As the detector size increased, all three detector materials exhibited higher efficiency, albeit with slightly reduced resolution. Significantly, the very low intrinsic activity of CeBr3 is also demonstrated in this study, which, when combined with energy resolution characteristics for a range of detector sizes, could lead to an improved ability to detect special nuclear materials compared to the other detectors.

Guss, Paul [NSTec; Reed, Michael [NSTec; Yuan, Ding [NSTec; Beller, Denis [UNLV; Cutler, Matthew [UNLV; Contreras, Chris [UNLV; Mukhopadhyay, Sanjoy [NSTec; Wilde, Scott UNLV

2014-03-01T23:59:59.000Z

208

The use of a synthetic attractant as a survey instrument for the southern pine beetle, Dendroctonus frontalis Zimmerman  

E-Print Network [OSTI]

'oc 'or: is (. 1! 1). " U. S CO ". !1S , resez, ted ir able 7 do coi;ci. ie zzit;; t;le ot, :-. er test series ia s;:01, ~-. ; co'. or ore "e -Csee tbou~bt =oi as jzari:e~', l . -. T: re s sorje erzide Tce or co oz 1'. iscziu "w-'. io:1 iri perte.... '". ! sand as a carr:er, ?o re= =':-. attract:ve:. "or a 0 s: o! atoc a'c. . c a, ~ s s iu! 'ca'ed t'cat t:cc ro1. a~''1- alp':a ? p='-. Cu -. ~~. "e !'?i "uses ti=. ou=i: . ;Ce vial ceps -t e. !ii sereut cu . ated:"ro!a i, '. :e area covered '=. t'ce pc...

Nash, Charles Ross

1970-01-01T23:59:59.000Z

209

Data:678ce1a9-73c5-4299-aa54-b70f702c53ce | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revision has been approvedea02758d3 No revision has1574de6f No revisionb70f702c53ce No revision has

210

Data:Ce155644-3dbb-44ce-80f8-79eb97a58f0a | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision has been approved for this page. It

211

Methane Combustion over Pd/ZrO2/SiC, Pd/CeO2/SiC, Pd/Zr0.5Ce0.5O2/SiC Catalysts  

E-Print Network [OSTI]

1 Methane Combustion over Pd/ZrO2/SiC, Pd/CeO2/SiC, Pd/Zr0.5Ce0.5O2/SiC Catalysts Xiaoning Guo a Laboratory of Coal Conversion, Institute of Coal Chemistry, Taiyuan 030001, PR China b GREMI UMR6606 CNRS0.5O2 solid solution) modified Pd/SiC catalysts for methane combustion are studied. XRD and XPS

Paris-Sud XI, Université de

212

Scintillation properties of some Ce[sup 3+] and Pr[sup 3+] doped inorganic crystals  

SciTech Connect (OSTI)

The scintillations properties of Ce[sup 3+] and Pr[sup 3+] doped complex fluoride crystals of composition CsGd[sub 2]F[sub 7] and K[sub 2]YF[sub 5] and of Pr[sup 3+] doped Y[sub 3]Al[sub 5]O[sub 12] single crystals were studied by means of x-ray and gamma ray excitation. The Ce[sub 3+] and Pr[sub 3+] doped fluoride crystals show 5d-4f luminescences at wavelengths near 340 nm and 240 nm, respectively. 5d-4f luminescence of Pr[sup 3+] doped Y[sub 3]Al[sub 5]O[sub 12] is observed between 300 and 400 nm. The authors present the absolute light yield in photons/MeV together with results from scintillation decay time experiments.

Dorenbos, P.; Visser, R.; Eijk, C.W.E. van (Delft Univ. of Technology (Netherlands). Dept. of Applied Physics); Khaidukov, N.M. (N.S. Kurnakov Inst. of General and Inorganic Chemistry, Moscow (Russian Federation)); Korzhik, M.V. (Inst. of Nuclear Problems, Minsk (Russian Federation))

1993-08-01T23:59:59.000Z

213

Magnetization switching of rare earth orthochromite CeCrO{sub 3}  

SciTech Connect (OSTI)

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

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

2014-06-09T23:59:59.000Z

214

Josephson effect in CeCoIn{sub 5} microbridges as seen via quantum interferometry  

SciTech Connect (OSTI)

A superconducting quantum interference device (SQUID) was prepared on a micron-sized single crystal using a selected growth domain of a thin film of CeCoIn{sub 5} grown by molecular beam epitaxy. SQUID voltage oscillations of good quality were obtained as well as interference effects stemming from the individual Josephson microbridges. The transport characteristics in the superconducting state exhibited several peculiarities which we ascribe to the periodic motion of vortices in the microbridges. The temperature dependence of the Josephson critical current shows good correspondence to the Ambegaokar-Baratoff relation, expected for the ideal Josephson junction. The results indicate a promising pathway to identify the type of order parameter in CeCoIn{sub 5} by means of phase-sensitive measurements on microbridges.

Foyevtsov, Oleksandr; Porrati, Fabrizio; Huth, Michael [Physikalisches Institut, Goethe University, Frankfurt am Main, 60438 (Germany)

2011-07-15T23:59:59.000Z

215

Investigation into Nanostructured Lanthanum Halides and CeBr{sub 3} for Nuclear Radiation Detection  

SciTech Connect (OSTI)

This slide-show presents work on radiation detection with nanostructured lanthanum halides and CeBr{sub 3}. The goal is to extend the gamma energy response on both low and high-energy regimes by demonstrating the ability to detect low-energy x-rays and relatively high-energy activation prompt gamma rays simultaneously using the nano-structured lanthanum bromide, lanthanum fluoride, cerium bromide, or other nanocrystal material. Homogeneous and nano structure cases are compared.

Guss, P., Guise, R., Mukhopadhyay, S., Yuan, D.

2011-06-22T23:59:59.000Z

216

Synthesis of Transient Climate Evolution of the last 21-kyr (SynTraCE-21)  

SciTech Connect (OSTI)

Climate evolution in the last 21,000 years provides critical observations for testing state-of-the-art climate models on the simulation of climate evolution and abrupt climate changes. Proxy evidences and new modeling activities have led to rapid advances in our understanding of climate change for this past time period. This funding helps to support the first international SynTraCE-21k workshop at Mount Hood, Oregon from 10-13 October, 2010.

Zhengyu Liu

2011-05-06T23:59:59.000Z

217

Luminescence Enhancement of CdTe Nanostructures in LaF3:Ce/CdTe Nanocomposites  

SciTech Connect (OSTI)

Radiation detection demands new scintillators with high quantum efficiency, high energy resolution and short luminescence lifetimes. Nanocomposites consisting of quantum dots and Ce3+ doped nanophosphors may be able to meet these requirements. Here we report the luminescence of LaF3:Ce/CdTe nanocomposites which were synthesized by a wet chemistry method. In LaF3:Ce/CdTe nanocomposites the CdTe quantum dots are converted into nanowires, while in LaF3/CdTe nanocomposites no such conversion is observed. The CdTe luminescence in LaF3:Ce/CdTe nanocomposites is enhanced about 5 times, while in LaF3/CdTe nanocomposites no enhancement was observed. Energy transfer, light-re-absorption and surface passivation are likely the reasons for the luminescence enhancement.

Yao, Mingzhen; Zhang, Xing; Ma, Lun; Chen, Wei; Joly, Alan G.; Huang, Jinsong; Wang, Qingwu

2010-11-15T23:59:59.000Z

218

A dipole polarizable potential for reduced and doped CeO[subscript 2] obtained from first principles  

E-Print Network [OSTI]

In this paper we present the parameterization of a new interionic potential for stoichiometric, reduced and doped CeO[subscript 2]. We use a dipole polarizable potential (DIPPIM: the dipole polarizable ion model) and ...

Burbano, Mario

219

Impact of the CE mark approval on exit opportunities and validation for early stage medical device companies  

E-Print Network [OSTI]

The aim of this thesis was to look at the impact of acquiring the CE marking approval on the outcome of early stage medical device companies, specifically its impact on strategic acquisition opportunities and on valuation. ...

Kothari, Ashish (Ashish Shrikant)

2011-01-01T23:59:59.000Z

220

Adsorption and Reaction of C1-C3 Alcohols over CeOx(111) Thin Films  

SciTech Connect (OSTI)

This study reports the interaction of methanol, ethanol, 1-propanol, and 2-propanol with well-ordered CeO{sub 2}(111) thin film surfaces. All of the alcohols adsorb at low temperature by forming alkoxy and hydroxyl species on the surface. On fully oxidized CeO{sub 2}(111), recombination occurs between some of the alkoxys and hydroxyls, resulting in alcohol desorption near 220 K. At the same temperature, some of the surface hydroxyls disproportionate to produce water and the loss of lattice O. The remaining alkoxys react above 550 K. The primary alcohols favor dehydrogenation products (aldehydes). There is a net loss of O from the system, resulting in a reduction of the ceria. The secondary alcohol, 2-propanol, undergoes primarily dehydration, producing propene with no net change in the cerium oxidation state. Reduced CeO{sub x}(111) competes with the gaseous products for available O. Little or no water is produced. The reaction selectivity for the C{sub 2} and C{sub 3} alcohols shifts toward favoring dehydration products. The loss of O from the alcohols leads to oxidation of the reduced ceria. Compared with the oxidized surface, the alkene desorption shifts to lower temperature, whereas the aldehyde desorption shifts to higher temperature. This indicates that, on the reduced surface, it is easier to break the C-O bond but more difficult to break the O-substrate bond.

D Mullins; S Senanayake; T Chen

2011-12-31T23:59:59.000Z

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


221

Fluids Mechanics -1 Consider a circular plate of outer radius Ro (a portion of which is shown in the figure). A fluid filled gap of thickness h(t)  

E-Print Network [OSTI]

Fluids Mechanics - 1 Consider a circular plate of outer radius Ro (a portion of which is shown in the figure). A fluid filled gap of thickness h(t) exists between the bottom of the plate and the flat surface that the fluid filling the gap is incompressible, inviscid and its motion is irrotational. Also assume the radial

Virginia Tech

222

Lead Grant Reference Lead Grant RO Grant Holder Last Name, First Name Project Title NE/K000071/1 Newcastle University Mr R Gaulton Dual-wavelength laser scanning for forest health  

E-Print Network [OSTI]

Newcastle University Mr R Gaulton Dual-wavelength laser scanning for forest health monitoring. NE/K000381/1Lead Grant Reference Lead Grant RO Grant Holder Last Name, First Name Project Title NE/K000071/1 and sensory mechanisms in bat navigation NE/K000403/1 University of Southampton Dr S Watt Emplacement dynamics

223

Ground-based observations of the beta Cephei CoRoT main target HD 180642: abundance analysis and mode identification  

E-Print Network [OSTI]

The known beta Cephei star HD 180642 was observed by the CoRoT satellite in 2007. From the very high-precision light curve, its pulsation frequency spectrum could be derived for the first time (Degroote and collaborators). In this paper, we obtain additional constraints for forthcoming asteroseismic modeling of the target. Our results are based on both extensive ground-based multicolour photometry and high-resolution spectroscopy. We determine T_eff = 24 500+-1000 K and log g = 3.45+-0.15 dex from spectroscopy. The derived chemical abundances are consistent with those for B stars in the solar neighbourhood, except for a mild nitrogen excess. A metallicity Z = 0.0099+-0.0016 is obtained. Three modes are detected in photometry. The degree l is unambiguously identified for two of them: l = 0 and l = 3 for the frequencies 5.48694 1/d and 0.30818 1/d, respectively. The radial mode is non-linear and highly dominant with an amplitude in the U-filter about 15 times larger than the strongest of the other modes. For th...

Briquet, M; Morel, T; Aerts, C; De Cat, P; Mathias, P; Lefever, K; Miglio, A; Poretti, E; Martin-Ruiz, S; Paparo, M; Rainer, M; Carrier, F; Gutirrez-Soto, J; Valtier, J C; Benko, J M; Bognr, Z; Niemczura, E; Amado, P J; Surez, J C; Moya, A; Rodriguez-Lopez, C; Garrido, R

2009-01-01T23:59:59.000Z

224

Morphological and Structural Changes During the Reduction and Reoxidation of CuO/CeO(2) and Ce(1-x)Cu(x)O(2) Nanocatalysts: In-situ Studies with Environmental TEM, XRD and XAS  

SciTech Connect (OSTI)

We have studied the structural, morphological, and electronic properties of CuO/CeO{sub 2} and Ce{sub 1-x}Cu{sub x}O{sub 2} nanocatalysts during reduction/oxidation cycles using H{sub 2} and O{sub 2} as chemical probes. Time-resolved in situ characterization was performed by X-ray diffraction (XRD) and X-ray absorption spectroscopy (XAS) as well as aberration-corrected environmental transmission electron microscopy (ETEM). We have found that both types of nanocatalysts reduce to a Cu/CeO{sub 2} biphase system with significant oxygen vacancies in CeO{sub 2}. Important variations are seen in the Cu particle size and metal dispersion depending on the initial state of the copper oxide-ceria systems. During subsequent in situ oxygen annealing, the Cu precipitated from the CuO/CeO{sub 2} system reoxidized to form CuO through a Cu{sub 2}O intermediate phase as expected. However, the Cu precipitated from the Ce{sub 0.8}Cu{sub 0.2}O{sub 2} solid solution behaved rather differently under oxidizing conditions, and neither oxidized to form CuO nor fully returned to a bulk Ce{sub 0.8}Cu{sub 0.2}O{sub 2} phase in solid solution. We found that {approx} 50% of the Cu returned to a Ce{sub 1-x}Cu{sub x}O{sub 2} solid solution, while the remainder was observed by in situ ETEM to form an amorphous copper oxide phase with a Cu oxidation state similar to Ce{sub 1-x}Cu{sub x}O{sub 2}, but with a local bonding environment similar to CuO. The behavior of the reduced Ce{sub 0.8}Cu{sub 0.2}O{sub 2} reflects strong interactions between Cu and the ceria matrix and illustrates the advantages of working with solid solutions of mixed oxides.

Rodriguez, J.A.; Ciston, J.; Si, R.; Hanson, J.C.; Martnez-Arias, A.; Fernandez-Garca, M.; Zhu, Y.

2011-07-21T23:59:59.000Z

225

Morphological and Structural Changes during the Reduction and Reoxidation of CuO/CeO2 and Ce1-xCuxO2 Nanocatalysts: In Situ Studies with Environmental TEM XRD and XAS  

SciTech Connect (OSTI)

We have studied the structural, morphological, and electronic properties of CuO/CeO{sub 2} and Ce{sub 1-x}Cu{sub x}O{sub 2} nanocatalysts during reduction/oxidation cycles using H2 and O2 as chemical probes. Time-resolved in situ characterization was performed by X-ray diffraction (XRD) and X-ray absorption spectroscopy (XAS) as well as aberration-corrected environmental transmission electron microscopy (ETEM). We have found that both types of nanocatalysts reduce to a Cu/CeO{sub 2} biphase system with significant oxygen vacancies in CeO{sub 2}. Important variations are seen in the Cu particle size and metal dispersion depending on the initial state of the copper oxide-ceria systems. During subsequent in situ oxygen annealing, the Cu precipitated from the CuO/CeO{sub 2} system reoxidized to form CuO through a Cu2O intermediate phase as expected. However, the Cu precipitated from the Ce{sub 0.8}Cu{sub 0.2}O{sub 2} solid solution behaved rather differently under oxidizing conditions, and neither oxidized to form CuO nor fully returned to a bulk Ce{sub 0.8}Cu{sub 0.2}O{sub 2} phase in solid solution. We found that 50% of the Cu returned to a Ce{sub 1-x}Cu{sub x}O{sub 2} solid solution, while the remainder was observed by in situ ETEM to form an amorphous copper oxide phase with a Cu oxidation state similar to Ce{sub 1-x}Cu{sub x}O{sub 2}, but with a local bonding environment similar to CuO. The behavior of the reduced Ce{sub 0.8}Cu{sub 0.2}O{sub 2} reflects strong interactions between Cu and the ceria matrix and illustrates the advantages of working with solid solutions of mixed oxides.

J Ciston; R Si; J Rodriquez; J Hanson; A Martinez-Arias; M Fernandez-Garcia; Y Zhu

2011-12-31T23:59:59.000Z

226

High thermoelectric performance of In, Yb, Ce multiple filled CoSb{sub 3} based skutterudite compounds  

SciTech Connect (OSTI)

Filling voids with rare earth atoms is an effective way to lowering thermal conductivity which necessarily enhances thermoelectric properties of skutterudite compounds. Yb atom is one of the most effective species among the rare earth atoms for filling the voids in the skutterudite structure due to a large atomic mass, radius and it is intermediate valence state. In this work, we aim to find the best filling partners for Yb using different combinations of Ce and In as well as to optimize actual filling fraction in order to achieve high values of ZT. The traditional method of synthesis relying on melting-annealing and followed by spark plasma sintering was used to prepare all samples. The thermoelectric properties of four samples of Yb{sub 0.2}In{sub 0.2}Co{sub 4}Sb{sub 12}, Yb{sub 0.2}Ce{sub 0.15}Co{sub 4}Sb{sub 12}, Yb{sub 0.2}Ce{sub 0.15}In{sub 0.2}Co{sub 4}Sb{sub 12}, and Yb{sub 0.3}Ce{sub 0.15}In{sub 0.2}Co{sub 4}Sb{sub 12} (nominal) were examined based on the Seebeck coefficient, electrical conductivity, thermal conductivity, and Hall coefficient. Hall coefficient and Seebeck coefficient signs confirm that all samples are n-type skutterudite compounds. Carrier density increases with the increasing Yb+Ce content. A high power factor value of 57.7 {mu}W/K{sup 2}/cm for Yb{sub 0.2}Ce{sub 0.15}Co{sub 4}Sb{sub 12} and a lower thermal conductivity value of 2.82 W/m/K for Yb{sub 0.2}Ce{sub 0.15}In{sub 0.2}Co{sub 4}Sb{sub 12} indicate that small quantities of Ce with In may be a good partner to Yb to reduce the thermal conductivity further and thus enhance the thermoelectric performance of skutterudites. The highest ZT value of 1.43 was achieved for Yb{sub 0.2}Ce{sub 0.15}In{sub 0.2}Co{sub 4}Sb{sub 12} triple-filled skutterudite at 800 K. - Graphical abstract: Thermoelectric figure of merit of Yb{sub x}In{sub y}Ce{sub z}Co{sub 4}Sb{sub 12} (0{<=}x,y,z{<=}0.18 actual) compounds versus temperature. Highlights: Black-Right-Pointing-Pointer TE properties of Yb,In,Ce multiple-filled Yb{sub x}In{sub y}Ce{sub z}Co{sub 4}Sb{sub 12} skutterudites were investigated. Black-Right-Pointing-Pointer Thermal conductivity is strongly suppressed by multiple filling of Yb, Ce and In. Black-Right-Pointing-Pointer Small amounts of Ce and In with Yb are beneficial for the enhancement of TE performance. Black-Right-Pointing-Pointer The highest ZT=1.43 was achieved with Yb{sub 0.07}In{sub 0.094}Ce{sub 0.065}Co{sub 4}Sb{sub 11.92} at 800 K.

Ballikaya, Sedat [Department of Physics, University of Istanbul, 34134 Vezneciler, Istanbul (Turkey) [Department of Physics, University of Istanbul, 34134 Vezneciler, Istanbul (Turkey); Department of Physics, University of Michigan, Ann Arbor, MI, 48109 (United States); Uzar, Neslihan; Yildirim, Saffettin [Department of Physics, University of Istanbul, 34134 Vezneciler, Istanbul (Turkey)] [Department of Physics, University of Istanbul, 34134 Vezneciler, Istanbul (Turkey); Salvador, James R. [Chemical Sci. and Mater. Systems Laboratory, General Motors Global R and D Center, Warren, MI 48090 (United States)] [Chemical Sci. and Mater. Systems Laboratory, General Motors Global R and D Center, Warren, MI 48090 (United States); Uher, Ctirad, E-mail: cuher@umich.edu [Department of Physics, University of Michigan, Ann Arbor, MI, 48109 (United States)] [Department of Physics, University of Michigan, Ann Arbor, MI, 48109 (United States)

2012-09-15T23:59:59.000Z

227

Rationalization of the Hubbard U parameter in CeO{sub x} from first principles: Unveiling the role of local structure in screening  

SciTech Connect (OSTI)

The density functional theory (DFT)+U method has been widely employed in theoretical studies on various ceria systems to correct the delocalization bias in local and semi-local DFT functionals with moderate computational cost. We present a systematic and quantitative study, aiming to gain better understanding of the dependence of Hubbard U on the local atomic arrangement. To rationalize the Hubbard U of Ce 4f, we employed the first principles linear response method to compute Hubbard U for Ce in ceria clusters, bulks, and surfaces. We found that the Hubbard U varies in a wide range from 4.3 eV to 6.7 eV, and exhibits a strong correlation with the Ce coordination number and CeO bond lengths, rather than the Ce 4f valence state. The variation of the Hubbard U can be explained by the changes in the strength of local screening due to O ? Ce intersite transitions.

Lu, Deyu, E-mail: dlu@bnl.gov, E-mail: pingliu3@bnl.gov; Liu, Ping, E-mail: dlu@bnl.gov, E-mail: pingliu3@bnl.gov [Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973 (United States)] [Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973 (United States)

2014-02-28T23:59:59.000Z

228

DOI-BLM-ID-110-2009-3825-CE | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin:EnergyWisconsin:2003)CrowleyEnergyMasse) JumpConsultation-2009-3825-CE Jump to:

229

XRD, lead equivalent and UV-VIS properties study of Ce and Pr lead silicate glasses  

SciTech Connect (OSTI)

In this work, Cerium (Ce) and Praseodymium (Pr) containing lead silicate glasses were produced with 2 different molar ratios low (0.2 wt%) and high (0.4wt%). These types of glasses can satisfy the characteristics required for radiation shielding glasses and minimize the lead composition in glass. The radiation shielding properties of the synthesized glasses is explained in the form of lead equivalent study. The XRD diffraction and UV-VIS analysis were performed to observe the structural changes of the synthesis glasses at 1.5 Gy gamma radiation exposures.

Alias, Nor Hayati, E-mail: norhayati@nuclearmalaysia.gov.my; Abdullah, Wan Shafie Wan, E-mail: norhayati@nuclearmalaysia.gov.my; Isa, Norriza Mohd, E-mail: norhayati@nuclearmalaysia.gov.my; Isa, Muhammad Jamal Md, E-mail: norhayati@nuclearmalaysia.gov.my; Zali, Nurazila Mat; Abdullah, Nuhaslinda Ee [Malaysian Nuclear Agency, 43000, Bangi, Kajang, Selangor (Malaysia); Muhammad, Azali [Malaysian Society for Non-Destructive Testing (Malaysia)

2014-02-12T23:59:59.000Z

230

Data:46440396-c64b-4541-ad0a-43775ce1671b | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3a87dcc95b No revisione66e17fc7f7 No revisione18fe97c No revision has been approved for775ce1671b

231

Probing the Reaction Intermediates for the Water-Gas Shift over Inverse CeOx/Au(111) Catalysts  

SciTech Connect (OSTI)

The water-gas shift (WGS) is an important reaction for the production of molecular H{sub 2} from CO and H{sub 2}O. An inverse CeO{sub x}/Au(1 1 1) catalyst exhibits a very good WGS activity, better than that of copper surfaces or Cu nanoparticles dispersed on a ZnO(0 0 0 {bar 1}) substrate which model current WGS industrial catalysts. In this work we report on intermediates likely to arise during the CO + H{sub 2}O reaction over CeO{sub x}/Au(1 1 1) using soft X-ray photoemission (sXPS) and near-edge X-ray absorption fine structure (NEXAFS). Several potential intermediates including formates (HCOO), carbonates (CO{sub 3}) and carboxylates (HOCO) are considered. Adsorption of HCOOH and CO{sub 2} is used to create both HCOO and CO{sub 3} on the CeO{sub x}/Au(1 1 1) surface, respectively. HCOO appears to have greater stability with desorption temperatures up to 600 K while CO{sub 3} only survives on the surface up to 300 K. On the CeO{sub x}/Au(1 1 1) catalysts, the presence of Ce{sup 3+} leads to the dissociation of H{sub 2}O to give OH groups. We demonstrate experimentally that the OH species are stable on the surface up to 600 K and interact with CO to yield weakly bound intermediates. When there is an abundance of Ce{sup 4+}, the OH concentration is diminished and the likely intermediates are carbonates. As the surface defects are increased and the Ce{sup 3+}/Ce{sup 4+} ratio grows, the OH concentration also grows and both carbonate and formate species are observed on the surface after dosing CO to H{sub 2}O/CeO{sub x}/Au(1 1 1). The addition of ceria nanoparticles to Au(1 1 1) is essential to generate an active WGS catalyst and to increase the production and stability of key reaction intermediates (OH, HCOO and CO{sub 3}).

Rodriguez, J.A.; Senanayake, S.D.; Stacchiola, D.; Evans, J.; Estrella, M.; Barrio-Pliego, L.; Prez, M.; Hrbek, J.

2010-05-04T23:59:59.000Z

232

Probing the Reaction Intermediates for the Watergas Shift over Inverse CeOx / Au(1 1 1) Catalysts  

SciTech Connect (OSTI)

The water-gas shift (WGS) is an important reaction for the production of molecular H{sub 2} from CO and H{sub 2}O. An inverse CeO{sub x}/Au(1 1 1) catalyst exhibits a very good WGS activity, better than that of copper surfaces or Cu nanoparticles dispersed on a ZnO(0 0 0 {bar 1}) substrate which model current WGS industrial catalysts. In this work we report on intermediates likely to arise during the CO + H{sub 2}O reaction over CeO{sub x}/Au(1 1 1) using soft X-ray photoemission (sXPS) and near-edge X-ray absorption fine structure (NEXAFS). Several potential intermediates including formates (HCOO), carbonates (CO{sub 3}) and carboxylates (HOCO) are considered. Adsorption of HCOOH and CO{sub 2} is used to create both HCOO and CO{sub 3} on the CeO{sub x}/Au(1 1 1) surface, respectively. HCOO appears to have greater stability with desorption temperatures up to 600 K while CO{sub 3} only survives on the surface up to 300 K. On the CeO{sub x}/Au(1 1 1) catalysts, the presence of Ce{sup 3+} leads to the dissociation of H{sub 2}O to give OH groups. We demonstrate experimentally that the OH species are stable on the surface up to 600 K and interact with CO to yield weakly bound intermediates. When there is an abundance of Ce{sup 4+}, the OH concentration is diminished and the likely intermediates are carbonates. As the surface defects are increased and the Ce{sup 3+}/Ce{sup 4+} ratio grows, the OH concentration also grows and both carbonate and formate species are observed on the surface after dosing CO to H{sub 2}O/CeO{sub x}/Au(1 1 1). The addition of ceria nanoparticles to Au(1 1 1) is essential to generate an active WGS catalyst and to increase the production and stability of key reaction intermediates (OH, HCOO and CO{sub 3}).

Senanayake, S.; Stacchiola, D; Evans, J; Estrella, M; Barrio, L; Perez, M; Hrbek, J; Rodriguez, J

2010-01-01T23:59:59.000Z

233

X-ray luminescence of CdTe quantum dots in LaF{sub 3}:Ce/CdTe nanocomposites  

SciTech Connect (OSTI)

CdTe quantum dots have intense photoluminescence but exhibit almost no x-ray luminescence. However, intense x-ray luminescence from CdTe quantum dots is observed in LaF{sub 3}:Ce/CdTe nanocomposites. This enhancement in the x-ray luminescence of CdTe quantum dots is attributed to the energy transfer from LaF{sub 3}:Ce to CdTe quantum dots in the nanocomposites. The combination of LaF{sub 3}:Ce nanoparticles and CdTe quantum dots makes LaF{sub 3}:Ce/CdTe nanocomposites promising scintillators for radiation detection.

Hossu, Marius; Liu Zhongxin; Yao Mingzhen; Ma Lun; Chen Wei

2012-01-02T23:59:59.000Z

234

Grant Title: RESEARCH GRANTS FOR PREVENTING VIOLENCE AND VIOLENCE-RELATED INJURY Funding Opportunity Number: RFA-CE-14-006. CFDA Number(s): 93.136.  

E-Print Network [OSTI]

Opportunity Number: RFA-CE-14-006. CFDA Number(s): 93.136. Agency/Department: Centers for Disease Control

Farritor, Shane

235

Nickel deficiency in RENi2-xP2 (RE=La, Ce, Pr). Combined crystallographic and physical property studies  

SciTech Connect (OSTI)

Large single crystals from RENi{sub 2-x}P{sub 2} (RE = La, Ce, Pr) were synthesized from the pure elements using Sn as a metal flux, and their structures were established by X-ray crystallography. The title compounds were confirmed to crystallize in the body-centered tetragonal ThCr{sub 2}Si{sub 2} structure type (space group I4/mmm (No. 139); Pearson's symbol tI10), but with a significant stoichiometry breadth with respect to the transition metal. Systematic synthetic work, coupled with accurate structure refinements indicated strong correlation between the degree of Ni-deficiency and the reaction conditions. For four different PrNi{sub 2-x}P{sub 2} (x {le} 0.5) samples, temperature dependent dc magnetization measurements indicated typical local moment 4f-magnetism and a stable Pr{sup 3+} ground state. Field-dependent heat capacity data confirmed a ferromagnetic order at low temperature, and the variations of T{sub c} with the concentration of Ni defects are discussed. LaNi{sub 2-x}P{sub 2}, as expected was found to be Pauli-like paramagnetic in the studied temperature regime, while the Ce-analog CeNi{sub 2-x}P{sub 2} (x = 0.28(1)) showed the characteristics of a mixed valent Ce{sup 3+}/Ce{sup 4+} system with a possible Kondo temperature on the order of 230 K.

Bauer, Eric D [Los Alamos National Laboratory; Ronning, Filip [Los Alamos National Laboratory; Thompson, Joe D [Los Alamos National Laboratory; Sarrao, John L [Los Alamos National Laboratory; Bobev, S [U. OF DE; Xia, S [U. OF DE

2008-01-01T23:59:59.000Z

236

Implementation of the SAM-CE Monte Carlo benchmark analysis capability for validating nuclear data and reactor design codes  

SciTech Connect (OSTI)

The National Nuclear Data Center is continuing its program to improve the nuclear data base used as input for commercial reactor analysis and design. In the most recent phase of this project the Monte Carlo program SAM-CE, developed by the Mathematical Applications Group, Inc. (MAGI), was made operational at BNL. This program was implemented on the BNL-CDC-7600 Computer, and also on the PDP-10 in-house computer. The NNDC made operational and developed techniques for processing ENDF/B-V cross sections for SAM-CE. A limited ENDF/B-V based library was produced. Use of the SAM-CE program in thermal reactor problems was validated using detailed comparisons of results with other Monte Carlo codes such as RECAP, RCP01 and VIM as well as with experimental data.

Beer, M.; Rose, P.

1981-04-01T23:59:59.000Z

237

On the local electronic and atomic structure of Ce{sub 1?x}Pr{sub x}O{sub 2??} epitaxial films on Si  

SciTech Connect (OSTI)

The local electronic and atomic structure of (111)-oriented, single crystalline mixed Ce{sub 1?x}Pr{sub x}O{sub 2??} (x?=?0, 0.1 and 0.6) epitaxial thin films on silicon substrates have been investigated in view of engineering redox properties of complex oxide films. Non-destructive X-ray absorption near edge structure reveals that Pr shows only +3 valence and Ce shows only nominal +4 valence in mixed oxides. Extended x-ray absorption fine structure (EXAFS) studies were performed at K edges of Ce and Pr using a specially designed monochromator system for high energy measurements. They demonstrate that the fluorite lattice of ceria (CeO{sub 2}) is almost not perturbed for x?=?0.1 sample, while higher Pr concentration (x?=?0.6) not only generates a higher disorder level (thus more disordered oxygen) but also causes a significant reduction of CeO interatomic distances. The valence states of the cations were also examined by techniques operating in highly reducing environments: scanning transmission electron microscopy-electron energy loss spectroscopy and X-ray photoemission spectroscopy; in these reducing environments, evidence for the presence of Ce{sup 3+} was clearly found for the higher Pr concentration. Thus, the introduction of Pr{sup 3+} into CeO{sub 2} strongly enhances the oxygen exchange properties of CeO{sub 2}. This improved oxygen mobility properties of CeO{sub 2} are attributed to the lattice disorder induced by Pr mixing in the CeO{sub 2} fluorite lattice, as demonstrated by EXAFS measurements. Thus, a comprehensive picture of the modifications of the atomic and electronic structure of Ce{sub 1?x}Pr{sub x}O{sub 2??} epitaxial films and their relation is obtained.

Niu, Gang, E-mail: gang@ihp-microelectronics.com; Schubert, Markus Andreas; Zoellner, Marvin Hartwig [IHP, Im Technologiepark 25, 15236 Frankfurt (Oder) (Germany); D'Acapito, Francesco [Consiglio Nazionale delle Ricerche, Istituto Officina dei Materiali, Operative Group in Grenoble, c/o European Synchrotron Radiation Facility, B.P. 220, 38043 Grenoble (France); Schroeder, Thomas [IHP, Im Technologiepark 25, 15236 Frankfurt (Oder) (Germany); BTU Cottbus-Senftenberg, Konrad-Zuse-Str. 1, 03046 Cottbus (Germany); Boscherini, Federico [Consiglio Nazionale delle Ricerche, Istituto Officina dei Materiali, Operative Group in Grenoble, c/o European Synchrotron Radiation Facility, B.P. 220, 38043 Grenoble (France); Department of Physics and Astronomy, University of Bologna, via le C. Berti Pichat 6/2, 40127 Bologna (Italy)

2014-09-28T23:59:59.000Z

238

456 IEEE TRANSACTIONS ON ROBOTICS, VOL. 24, NO. 2, APRIL 2008 the PA10-6CE utilizing the geometric and flexibility calibration method  

E-Print Network [OSTI]

456 IEEE TRANSACTIONS ON ROBOTICS, VOL. 24, NO. 2, APRIL 2008 the PA10-6CE utilizing the geometric for demanding dynamic ap- plications with the PA10-6CE robot arm. ACKNOWLEDGMENT The authors thank N. Mauntler in robot joints with harmonic drives and torque sensors," Int. J. Robot. Res., vol. 16, no. 2, pp. 214­ 239

239

The University of Florida Dean of Students O ce creates a culture of care for students, their families, faculty and sta by providing exemplary  

E-Print Network [OSTI]

The University of Florida Dean of Students O ce creates a culture of care for students. Develop an inclusive physical environment for Veteran services and resources. Focus energy towards 2012. Complete and implement recommendations from the O ce of Audit & Compliance Review internal audit

Roy, Subrata

240

The effect of Au and Ni doping on the heavy fermion state of the Kondo lattice antiferromagnet CePtZn  

SciTech Connect (OSTI)

We have probed the effect of doping CePtZn with Au and Ni and also investigated in detail the magnetic behavior of the iso-structural CeAuZn. A magnetic ground state is observed in both CePt{sub 0.9}Au{sub 0.1}Zn and CePt{sub 0.9}Ni{sub 0.1}Zn with T{sub N}?=?2.1 and 1.1?K and the coefficient of the linear term of electronic heat capacity ??=?0.34 and 0.9?J/mol K{sup 2}, respectively. The corresponding values for CePtZn are 1.7?K and 0.6?J/mol K{sup 2}. The altered values of T{sub N} and ? show that the electronic correlations in CePtZn are affected by doping with Au and Ni. CeAuZn orders magnetically near 1.7?K and its electrical resistivity shows a normal metallic behavior. Together with a ? of 0.022?J/mol K{sup 2} the data indicate a weak 4f-conduction electron hybridization in CeAuZn characteristic of normal trivalent cerium based systems.

Dhar, S. K., E-mail: sudesh@tifr.res.in [DCMPMS, T.I.F.R., Homi Bhabha Road, Colaba, Mumbai 400005 (India); Aoki, Y.; Suemitsu, B.; Miyazaki, R. [Department of Physics, Tokyo Metropolitan University, Minami-Ohsawa 1-1, Hachioji-Shi, Tokyo (Japan); Provino, A.; Manfrinetti, P. [Departimento Physica Chemicale, Universita di Genova, Via Dodecaneso, 16146 Genova (Italy)

2014-05-07T23:59:59.000Z

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


241

\\\\Ce_equine3\\public\\Cheryl\\WebDocuments\\OnLine\\CCYouthNomForm.doc NEW HAMPSHIRE 4-H CURRICULUM COMMITTEE  

E-Print Network [OSTI]

\\\\Ce_equine3\\public\\Cheryl\\WebDocuments\\OnLine\\CCYouthNomForm.doc NEW HAMPSHIRE 4-H CURRICULUM, including this year? #12;\\\\Ce_equine3\\public\\Cheryl\\WebDocuments\\OnLine\\CCYouthNomForm.doc 2. List and structure of 4-H (service, training, background, etc.) 4. What special attributes does this youth have

New Hampshire, University of

242

Momentum transfer driven textural changes of CeO{sub 2} thin films  

SciTech Connect (OSTI)

The influence of the target erosion depth on the film texture was investigated during DC reactive magnetron sputter deposition of CeO{sub 2} thin films. Three fluxes towards the substrate surface (the relative negative oxygen ion flux, the material flux, and the energy flux) were measured and related to the ongoing erosion of a cerium target. As the deposition rate increased for more eroded targets, both the energy flux and the negative ion flux decreased. Cerium oxide thin films that were deposited at different target erosion states, exhibited a change in preferential crystalline orientation from [200] to [111]. This textural change cannot be explained in terms of the energy per arriving atom concept. Instead, it is shown that the momentum of the high energetic negative ions is an essential condition to clarify the witnessed trends.

Van Steenberge, S., E-mail: sigelinde.vansteenberge@ugent.be; Leroy, W. P.; Depla, D. [Department of Solid State Sciences, Ghent University, Krijgslaan 281/S1, 9000 Ghent (Belgium); Hubin, A. [Department of Materials and Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels (Belgium)

2014-09-15T23:59:59.000Z

243

Preparation, crystallography, magnetic and magnetothermal properties of Ce5SiGe4-x alloys  

SciTech Connect (OSTI)

An investigation of the crystal structure and the phase relationships in the Ce{sub 5}Si{sub 4-x}Ge{sub x} system has been carried out. The crystal structures of the single phase intermetallics were characterized using X-ray powder diffraction and subsequent refinement employing the Rietveld analysis technique was performed. The intermetallic system was found to crystallize in three distinct crystal structures. The Ce{sub 5}Si{sub 4}-based solid solution extends from x = 0 to x = 2.15 and it was found to crystallize in the well-known Zr{sub 5}Si{sub 4}-type tetragonal structure. The germanium rich alloys, where 3.1 {le} x {le} 4, crystallized in the Sm{sub 5}Ge{sub 4}-type orthorhombic structure. The crystal structure of the intermediate phase, when 2.35 {le} x {le} 2.8, was found out to be of the Gd{sub 5}Si{sub 2}Ge{sub 2}-type monoclinic structure. Microhardness tests were conducted on the samples in order to probe the trend in mechanical properties in this alloy system as a function of Ge concentration. The magnetic, thermal and magnetocaloric properties of the Ce{sub 5}Si{sub 4-x}Ge{sub x} alloy system have been investigated for x = 0, 1.0, 1.8, 2.5, 2.8, 3.5, 3.8 and 4.0. The phases with x = 0, 1.0 and 1.8 crystallize in the tetragonal Zr{sub 5}Si{sub 4} structure and those with x = 2.5, 2.8 form in the Gd{sub 5}Si{sub 2}Ge{sub 2}-type monoclinic structure. The alloys with x = 3.5, 3.8 and 4.0 crystallize in the Sm{sub 5}Ge{sub 4}-type orthorhombic structure. The Curie temperature of the tetragonal phases increases with increasing Ge content. The ordering temperatures of the monoclinic and orthorhombic phases remain nearly unaffected by the composition, with the Curie temperatures of the latter slightly higher than those of the former. All the alloys display evidence of antiferromagnetic interactions in the ground state. The orthorhombic and the monoclinic alloys behave as ferromagnets whereas the Si-rich tetragonal phase acts more like an antiferromagnet at high fields (1 T and higher). The maximum isothermal magnetic entropy change occurs at {approx}11 K in the monoclinic and orthorhombic phases with the highest value being 14.7 J/kg.K for Ce{sub 5}Ge{sub 4} for a field change of 10 T which is considered moderate.

Vijayaraghavan, Rangarajan

2005-05-01T23:59:59.000Z

244

Vortex Lattice Studies in CeCoIn? with H?c  

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

We present small angle neutron scattering studies of the vortex lattice (VL) in CeCoIn? with magnetic fields applied parallel (H) to the antinodal [100] and nodal [110] directions. For H II 100], a single VL orientation is observed, while a 90 reorientation transition is found for H II [110]. For both field orientations and VL configurations we find a distorted hexagonal VL with an anisotropy, ?=2.00.05. The VL form factor shows strong Pauli paramagnetic effects similar to what have previously been reported for H II [001]. At high fields, above which the upper critical field (Hc2) becomes a first-order transition, an increased disordering of the VL is observed.

Das, P.; White, J. S.; Holmes, A. T.; Gerber, S.; Forgan, E. M.; Bianchi, A. D.; Kenzelmann, M.; Zolliker, M.; Gavilano, J. L.; Bauer, E. D.; Sarrao, J. L.; Petrovic, C.; Eskildsen, M. R.

2012-02-01T23:59:59.000Z

245

Theoretical studies of Ir5Th and Ir5Ce nanoscale precipitates in Ir  

SciTech Connect (OSTI)

Experimentally, it is known that very small amounts of thorium and/or cerium added to iridium metal form a precipitate, Ir5Th / Ir5Ce, which improves the high temperature mechanical properties of the resulting alloys. We demonstrate that there are low-energy configurations for nano-scale precipitates of these phases in Ir, and that these coherent arrangements may assist in producing improved mechanical properties. One precipitate/matrix orientation gives a particularly low interfacial energy, and a low lattice misfit. Nanolayer precipitates with this orientation are found to be likely to form, with little driving force to coarsen. The predicted morphology of the precipitates and their orientation with the matrix phase provide a potential experiment that could be used to test these predictions.

Morris, James R [ORNL] [ORNL; Averill, Frank [ORNL] [ORNL; Cooper, Valentino R [ORNL] [ORNL

2014-01-01T23:59:59.000Z

246

Complex magnetic ordering in CeFe1.76 studied by neutron diffraction  

SciTech Connect (OSTI)

Neutron diffraction measurements on a single crystal of CeGe1.76 reveal a complex series of magnetic transitions at low temperature. At TN?7 K, there is a transition from a paramagnetic state at higher temperature to an incommensurate magnetic structure characterized by a magnetic propagation vector (0 0 ?) with ??14 and the magnetic moment along the a axis of the orthorhombic unit cell. Below TLI?5 K, the magnetic structure locks in to a commensurate structure with ?=14 and the magnetic moment remains along the a axis. Below T??4 K, we find additional half-integer and integer indexed magnetic Bragg peaks consistent with a second commensurately ordered antiferromagnetic state.

Jayasekara, Wageesha T [Ames Laboratory; Tian, W [Oak Ridge National Laboratory; Hodovanets, Halyna [Ames Laboratory; Canfield, Paul C [Ames Laboratory; Bud'ko, Serguei L [Ames Laboratory; Kreyssig, Andreas [Ames Laboratory; Goldman, Alan I [Ames Laboratory

2014-10-01T23:59:59.000Z

247

UCL SChooL of Life and MediCaL SCienCeS Creating knowledge, achieving impact  

E-Print Network [OSTI]

UCL SChooL of Life and MediCaL SCienCeS Creating knowledge, achieving impact Population Health 4 #12;PREFACE UCL's School of Life and Medical Sciences encompasses arguably the greatest concentration Assessment Exercise was outstanding, and for most key measures the School comfortably tops UK league tables

Saunders, Mark

248

Pour citer ce document : CHELKOFF, Grgoire. For an ecological approach to architecture : perception and design. First International Workshop  

E-Print Network [OSTI]

Pour citer ce document : CHELKOFF, Grégoire. For an ecological approach to architecture : perception and design. First International Workshop : Architectural and urban Ambient Environment, Nantes, 6-7-8 Février 2002. Nantes: CERMA, Ecole D'architecture de Nantes, 2002, 11p. For an ecological approach

Paris-Sud XI, Université de

249

CO Oxidation at the Au-Cu Interface of Bimetallic Nanoclusters Supported on CeO2(111)  

E-Print Network [OSTI]

of tunable interfaces, metal and oxide,9,12,15-18 metal and carbide,19 and oxide and oxide,2 of the structure of CeO2(111)-supported Au- based bimetallic nanoclusters (NCs) show that a strong support-metal Materials, and Catalysis The critical role of the interface between a supporting oxide and supported metal

Henkelman, Graeme

250

Synthesis and properties of Sr2CeO4 blue emission powder phosphor for field emission displays  

E-Print Network [OSTI]

for publication 19 January 1999 A blue emission powder phosphor Sr2CeO4 for field emission displays was preparedV. The emission peak of this phosphor is at 470 nm and Commission International de l'Eclairage coordinates are x 0

Wang, Zhong L.

251

Charge transfer and formation of reduced Ce{sup 3+} upon adsorption of metal atoms at the ceria (110) surface  

SciTech Connect (OSTI)

The modification of cerium dioxide with nanoscale metal clusters is intensely researched for catalysis applications, with gold, silver, and copper having been particularly well studied. The interaction of the metal cluster with ceria is driven principally by a localised interaction between a small number of metal atoms (as small as one) and the surface and understanding the fundamentals of the interaction of metal atoms with ceria surfaces is therefore of great interest. Much attention has been focused on the interaction of metals with the (111) surface of ceria, since this is the most stable surface and can be grown as films, which are probed experimentally. However, nanostructures exposing other surfaces such as (110) show high activity for reactions including CO oxidation and require further study; these nanostructures could be modified by deposition of metal atoms or small clusters, but there is no information to date on the atomic level details of metal-ceria interactions involving the (110) surface. This paper presents the results of density functional theory (DFT) corrected for on-site Coulomb interactions (DFT+U) calculations of the adsorption of a number of different metal atoms at an extended ceria (110) surface; the metals are Au, Ag, Cu, Al, Ga, In, La, Ce, V, Cr, and Fe. Upon adsorption all metals are oxidised, transferring electron(s) to the surface, resulting in localised surface distortions. The precise details depend on the identity of the metal atom. Au, Ag, Cu each transfer one electron to the surface, reducing one Ce ion to Ce{sup 3+}, while of the trivalent metals, Al and La are fully oxidised, but Ga and In are only partially oxidised. Ce and the transition metals are also partially oxidised, with the number of reduced Ce ions possible in this surface no more than three per adsorbed metal atom. The predicted oxidation states of the adsorbed metal atoms should be testable in experiments on ceria nanostructures modified with metal atoms.

Nolan, Michael [Tyndall National Institute, University College Cork, Lee Maltings, Prospect Row, Cork (Ireland)

2012-04-07T23:59:59.000Z

252

Synthesis, Structures, and Magnetic Properties of Rare-Earth Cobalt Arsenides, RCo2As2 (R = La, Ce, Pr, Nd)  

SciTech Connect (OSTI)

Four rare-earth cobalt arsenides, RCo2As2 (R = La, Ce, Pr, Nd), were obtained by reactions of constituent elements in molten Bi. The use of Bi flux also allowed the growth of representative single crystals. All compounds are isostructural and belong to the ThCr2Si2 structure type (space group I4/mmm). The formation of Co vacancies is observed in all structures, while the structures of La- and Ce-containing compounds also show incorporation of minor Bi defects next to the R crystallographic site. Correspondingly, the general formula of these materials can be written as R1 xBixCo2 As2, with x/ = 0.03/0.1, 0.05/0.15, 0/0.2, and 0/0.3 for R = La, Ce, Pr, and Nd, respectively. All compounds exhibit high-temperature ferromagnetic ordering of Co magnetic moments in the range of 150-200 K. Electronic band structure calculations revealed a high peak in the density of states at the Fermi level, thus supporting the itinerant nature of magnetism in the Co sublattice. The magnetic ordering in the lanthanide sublattice takes place at lower temperatures, with the R moments aligning antiparallel to the Co moments to give a ferrimagnetic ground state. The measurements on oriented single crystals demonstrated significant magnetic anisotropy in the ferrimagnetic state, with the preferred moment alignment along the c axis of the tetragonal lattice. Neutron powder diffraction failed to reveal the structure of magnetically ordered states, but confirmed the presence of Co vacancies. X-ray absorption near-edge structure spectroscopy on Ce1.95Bi0.05Co1.85As2 showed the average oxidation state of Ce to be +3.06. Solid state NMR spectroscopy revealed a substantially reduced hyperfine field on the Co atoms in the vicinity of Bi defects.

Thompson, Corey [Florida State University, Tallahassee] [Florida State University, Tallahassee; Tan, Xiaoyan [Florida State University, Tallahassee] [Florida State University, Tallahassee; Kovnir, Kirill [Florida State University, Tallahassee] [Florida State University, Tallahassee; Garlea, Vasile O [ORNL] [ORNL; Shatruk, Michael [Florida State University, Tallahassee] [Florida State University, Tallahassee

2014-01-01T23:59:59.000Z

253

Effect of MnO on the microstructures, phase stability and mechanical properties of ceria-partially-stabilized zirconia (Ce-TZP) and Ce-TZP-Al sub 2 O sub 3 composites  

SciTech Connect (OSTI)

Effect of increasing amounts of MnO additions on the microstructures, phase stability and mechanical properties of ZrO{sub 2}-12 m% CeO{sub 2} and ZrO{sub 2}-12 m% CeO{sub 2}-10 w% Al{sub 2}O{sub 3} were studied. MnO suppressed grain growth in ZrO{sub 2}-12 m% CeO{sub 2}, while enhancing the mechanical properties significantly (strength=557 MPa, fracture toughness=9.3 MPa.(m){sup 1/2} at 0.2 w% MnO). The enhanced mechanical properties were achieved despite an increased stability of the tetragonal phase as evidenced by a lower burst transformation temperature (M{sub b}) and a reduced volume fraction of the monoclinic phase on the fracture surface. In ZrO{sub 2}-12 m% CeO{sub 2}-10 w% Al{sub 2}O{sub 3}, the addition of MnO suppressed the grain size of ZrO{sub 2}, while promoting grain growth and changing the morphology of Al{sub 2}O{sub 3}. More significantly, the stability of the tetragonal ZrO{sub 2} phase decreased (high M{sub b} temperature) with a concurrent increase in fracture toughness (13.2 MPa.(m){sup 1/2} at 2 w% MnO) and transformation plasticity (1.2% in four-point bending). The widths of the transformation zones observed adjacent to the fracture surfaces showed a consistent inverse relation to the transformation yield stress as would be expected from the mechanics of stress-induced phase transformation at crack tips. The improvements in mechanical properties obtained in the base Ce-TZP and the Ce-TZP-Al{sub 2}O{sub 3} composite ceramics with the addition of MnO are critically examined in the context of transformation toughening and other possible mechanisms.

Wang, J.S.; Tsai, J.F.; Shetty, D.K.; Virkar, A.V. (Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT (USA))

1990-09-01T23:59:59.000Z

254

A benchmark for investigating the radial dependence of C/E for control rod worths in large decoupled cores  

SciTech Connect (OSTI)

The first physics measurements of a heterogeneous core on the critical assembly ZPPR-7 at ANL showed that the C/E ratios with ENDF/B data for the worths of the control rods in the outer bank were several percent higher than those at the inner bank positions. This radial variation in the C/E for the rod worths was further confirmed in the analysis of the large conventional core ZPPR-10, and again in the analysis of the large heterogeneous core series ZPPR-13. In the design of a power reactor, the number of control rods, and their disposition, are determined by calculations. Misprediction of the worth of the control rods can lead to serious economic penalties by restricting the operation of the core. Retrofitting a core to accommodate more worth will be costly and is likely to lead to a non-optimized core. This document provides a discussion of these calculations. 7 refs., 7 figs., 12 tabs.

Salvatores, M. (CEA Centre d'Etudes Nucleaires de Cadarache, 13 - Saint-Paul-lez-Durance (France)); Orechwa, Y. (Argonne National Lab., IL (USA)); Collins, P.J. (Argonne National Lab., Idaho Falls, ID (USA))

1990-01-01T23:59:59.000Z

255

Q-dependence of the spin fluctuations in the intermediate valence compound CePd3  

SciTech Connect (OSTI)

We report inelastic neutron scattering experiments on a single crystal of the intermediate valence compound CePd3. At 300 K the magnetic scattering is quasielastic, with half-width G = 23 meV, and is independent of momentum transfer Q. At low temperature, the Q-averaged magnetic spectrum is inelastic, exhibiting a broad peak centered near E-max = 55 meV. These results, together with the temperature dependence of the susceptibility, 4f occupation number, and specific heat, can be fit by the Kondo/Anderson impurity model. The low temperature scattering near Emax, however, shows significant variations with Q, reflecting the coherence of the 4f lattice. The intensity is maximal at (1/2, 1/2, 0), intermediate at (1/2, 0, 0) and (0, 0, 0), and weak at (1/2, 1/2, 1/2). We discuss this Q-dependence in terms of current ideas about coherence in heavy fermion systems.

Fanelli, V. R.; Lawrence, J. M.; Goremychkin, E. A.; Osborn, R.; Bauer, E. D.; McClellan, K. J.; Thompson, J. D.; Booth, C. H.; Christianson, A. D.; Riseborough, P. S.

2014-06-25T23:59:59.000Z

256

Observation of inner-shell-excited configurations in triply ionized cerium Ce{sup 3+}  

SciTech Connect (OSTI)

We report wavelength measurements and energy levels for the three-times ionized cerium atom Ce{sup 3+}. The spectrum is that of a simple one-electron atom overlaid with a more complex three-electron spectrum originating from the excitation of an electron in the inner closed shell to the valence shell. The data provide energy levels for the inner-shell-excited configurations 5p{sup 5}4f5d and 5p{sup 5}4f6s and solve a long-standing puzzle regarding the fine structure of the 5p{sup 6}6d configuration, which is known to be anomalously large and inverted. The data show that this anomalous fine structure is the result of interaction between 5p{sup 6}6d and the inner-shell-excited configuration 5p{sup 5}4f5d. The results are supported by Hartree-Fock calculations and least-squares fits of the energy parameters to the observed levels. From our observed 5p{sup 6}6g configuration, we determine the ionization energy as 297670{+-}70 cm{sup -1} (36.906{+-}0.009 eV)

Reader, Joseph; Wyart, Jean-Francois [National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States); Laboratoire Aime Cotton, CNRS, Universite Paris-Sud, Batiment 505, 91405 Orsay Cedex (France)

2009-10-15T23:59:59.000Z

257

Ion-Beam-Induced Chemical Mixing at a Nanocrystalline CeO2Si Interface  

SciTech Connect (OSTI)

Thin films of nanocrystalline ceria deposited onto a silicon substrate have been irradiated with 3 MeV Au+ ions to a total dose of 34 displacements per atom to examine the film/substrate interfacial response upon displacement damage. Under irradiation, a band of contrast is observed to form that grows under further irradiation. Scanning and high-resolution transmission electron microscopy imaging and analysis suggest that this band of contrast is a cerium silicate phase with an approximate Ce:Si:O composition ratio of 1:1:3 in an amorphous nature. The slightly nonstoichiometric composition arises due to the loss of mobile oxygen within the cerium silicate phase under the current irradiation condition. This nonequilibrium phase is formed as a direct result of ion-beam-induced chemical mixing caused by ballistic collisions between the incoming ion and the lattice atoms. This may hold promise in ion beam engineering of cerium silicates for microelectronic applications e.g., the fabrication of blue LEDs.

Edmondson, P. D.; Young, Niel P.; Parish, Chad M.; Moll, Sandra J.; Namavar, Fereydoon; Weber, William J.; Zhang, Yanwen

2013-02-28T23:59:59.000Z

258

Ion-Beam-Induced Chemical Mixing at a Nanocrystalline CeO2 Si Interface  

SciTech Connect (OSTI)

Thin films of nanocrystalline ceria deposited onto a silicon substrate have been irradiated with 3 MeV Au+ ions to a total dose of 34 displacements per atom to examine the film/substrate interfacial response upon displacement damage. Under irradiation, a band of contrast is observed to form that grows under further irradiation. Scanning and high-resolution transmission electron microscopy imaging and analysis suggest that this band of contrast is a cerium silicate phase with an approximate Ce:Si:O composition ratio of 1:1:3 in an amorphous nature. The slightly nonstoichiometric composition arises due to the loss of mobile oxygen within the cerium silicate phase under the current irradiation condition. This nonequilibrium phase is formed as a direct result of ion-beam-induced chemical mixing caused by ballistic collisions between the incoming ion and the lattice atoms. This may hold promise in ion beam engineering of cerium silicates for microelectronic applications e.g., the fabrication of blue LEDs.

Edmondson, Dr. Philip [University of Oxford; Young, Neil P. [Department of Materials, University of Oxford, Parks Rd, Oxford, OX1 3PH, UK; Parish, Chad M [ORNL; Moll, Sandra [CEA, Saclay, France; Namavar, Fereydoon [University of Nebraska Medical Center; Weber, William J [ORNL; Zhang, Yanwen [ORNL

2013-01-01T23:59:59.000Z

259

Structure Sensitivity of the Low-temperature Water-gas Shift Reaction on CuCeO2 catalysts  

SciTech Connect (OSTI)

We have investigated the structure sensitivity of the water-gas shift (WGS) reaction on Cu-CeO{sub 2} catalysts prepared at the nanoscale by different techniques. On the surface of ceria, different CuO{sub x} structures exist. We show here that only the strongly bound Cu-[O{sub x}]-Ce species, probably associated with the surface oxygen vacancies of ceria, are active for catalyzing the low-temperature WGS reaction. Weakly bound CuO{sub x} clusters and CuO nanoparticles are spectator species in the reaction. Isolated Cu{sup 2+} ions doping the ceria surface are not active themselves, but they are important in that they create oxygen vacancies and can be used as a reservoir of copper to replenish surface Cu removed by leaching or sintering. Accordingly, synthesis techniques such as coprecipitation that allow for extensive solubility of Cu in ceria should be preferred over impregnation, deposition-precipitation, ion exchange or another two-step method whereby the copper precursor is added to already made ceria nanocrystals. For the synthesis of different structures, we have used two methods: a homogeneous coprecipitation (CP), involving hexamethylenetetramine as the precipitating agent and the pH buffer; and a deposition-precipitation (DP) technique. In the latter case, the ceria supports were first synthesized at the nanoscale with different shapes (rods, cubes) to investigate any potential shape effect on the reaction. Cu-CeO{sub 2} catalysts with different copper contents up to ca. 20 at.% were prepared. An indirect shape effect of CeO{sub 2}, manifested by the propensity to form oxygen vacancies and strongly bind copper in the active form, was established; i.e. the water-gas shift reaction is not structure-sensitive. The apparent activation energy of the reaction on all samples was similar, 50 {+-} 10 kJ/mol, in a product-free (2% CO-10% H{sub 2}O) gas mixture.

Si, R.; Zhang, L.; Raitano, J.; Yi, N.; Chan, S.-W.; Flytzani-Stephanopoulos, M.

2012-01-17T23:59:59.000Z

260

Characterization of Ce SUP 3+-tributyl phosphate coordination complexes produced by fused droplet electrospray ionization with a target capillary  

SciTech Connect (OSTI)

Coordination complexes containing Ce(III) and tri-n-butyl phosphate (TBP) in the 1+, 2+ and 3+ charge states were generated using desorption electrospray ionization (DESI) mass spectrometry, in which the analyte solutions were supplied via a target capillary orthogonally situated with respect to the electrospray. Comparison with direct electrospray (ESI) showed that the same coordination complexes were produced in each experiment, and could be described by the general formula [Ce(NO3)m=0-2(TBP)n](3-m)+. This result indicates that DESI has utility for measuring metal speciation for metal ligand solutions where the gas-phase complexes generated by ESI have been correlated with solution speciation. Such an application would be useful for analyses where it is desirable to limit the total amount of metal being handled, or that have solvent systems that are not readily amenable to ESI. Both the direct ESI and DESI mass spectra showed similar trends with respect to the TBP:Ce ratio, viz. high values tend to favor formation of a larger fraction of the 1+ species, and the 2+ and 3+ species become relatively more important as the ratio is decreased. Within individual charge state ion envelopes, lower TBP:Ce ratios produce coordination complexes with fewer ligands, a trend also seen using both approaches. These trends again point toward strong similarity between the direct ESI and DESI analyses of the metal-ligand solutions. The DESI experiments were less sensitive for measuring the coordination complexes compared to the direct ESI experiments, by a factor of 10 - 100 depending on whether minimum detectable concentration or absolute ion abundances were considered. Nevertheless, mid-picomolar quantities of coordination complexes were measured using the target capillary, indicating that sensitivity would be sufficient for measuring species in many industrial separations processes.

Gary S. Groenewold; Jean-Jacques Gaumet

2011-12-01T23:59:59.000Z

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


261

Anomalous Chemical Expansion Behavior of Pr[subscript 0.2]Ce[subscript 0.8]O[subscript 2-?] Thin Films Grown by Pulsed Laser Deposition  

E-Print Network [OSTI]

The chemomechanical and electrical properties of (Pr,Ce)O[subscript 2-?] thin films were studied between 30 and 875C in air by in situ X-ray diffraction and complex impedance spectroscopy measurements. Reduction/oxidation ...

Kuru, Y.

262

Adsorption and Reaction of C(1)-C(3) Alcohols over CeO(x)(111) Thin Films  

SciTech Connect (OSTI)

This study reports the interaction of methanol, ethanol, 1-propanol, and 2-propanol with well-ordered CeO{sub 2}(111) thin film surfaces. All of the alcohols adsorb at low temperature by forming alkoxy and hydroxyl species on the surface. On fully oxidized CeO{sub 2}(111), recombination occurs between some of the alkoxys and hydroxyls, resulting in alcohol desorption near 220 K. At the same temperature, some of the surface hydroxyls disproportionate to produce water and the loss of lattice O. The remaining alkoxys react above 550 K. The primary alcohols favor dehydrogenation products (aldehydes). There is a net loss of O from the system, resulting in a reduction of the ceria. The secondary alcohol, 2-propanol, undergoes primarily dehydration, producing propene with no net change in the cerium oxidation state. Reduced CeO{sub X}(111) competes with the gaseous products for available O. Little or no water is produced. The reaction selectivity for the C{sub 2} and C{sub 3} alcohols shifts toward favoring dehydration products. The loss of O from the alcohols leads to oxidation of the reduced ceria. Compared with the oxidized surface, the alkene desorption shifts to lower temperature, whereas the aldehyde desorption shifts to higher temperature. This indicates that, on the reduced surface, it is easier to break the C-O bond but more difficult to break the O-substrate bond.

Mullins, David R [ORNL; Senanayake, Sanjaya D [ORNL; Chen, Tsung-Liang [ORNL

2010-01-01T23:59:59.000Z

263

Structural characterization of the CeO{sub 2}/Gd{sub 2}O{sub 3} mixed system by synchrotron X-ray diffraction  

SciTech Connect (OSTI)

The structural determination of the CeO{sub 2}/Gd{sub 2}O{sub 3} mixed system is a non-trivial problem because of the close resemblance between the ionic sizes of Ce{sup 4+} and Gd{sup 3+} and between the crystal structures of CeO{sub 2} and Gd{sub 2}O{sub 3}. (Ce{sub 1-x}Gd{sub x})O{sub 2-x/2} powder samples with x ranging between 0 and 1 have been synthesized by coprecipitation of mixed oxalates and subsequent thermal decomposition in air at 1200 Degree-Sign C followed by slow cooling. Synchrotron powder X-ray diffraction data were collected and refined by the Rietveld method. Lattice parameters do not follow Vegard's law and no peak splitting has been observed for any composition, meaning that no biphasic regions exist over the whole compositional range. The same hybrid structural model - a proper mixture of the structures of the two pure oxides - was used for the refinements, allowing to account for the data observed. - graphical abstract: Substituting Ce{sup 4+} by Gd{sup 3+}, a gradual transition from the F structure (typical of CeO{sub 2}) to the C structure (typical of Gd{sub 2}O{sub 3}) takes place. The lattice parameters do not follow Vegard's law. Highlights: Black-Right-Pointing-Pointer A structural study of Ce-Gd mixed oxides has been performed. Black-Right-Pointing-Pointer In (Ce{sub 1-x}Gd{sub x})O{sub 2-x/2} a solid solution forms for 0{<=}x{<=}0.3. Black-Right-Pointing-Pointer For x>0.3 a gradual transition from the C to the F structure is observed. Black-Right-Pointing-Pointer Lattice parameters do not follow Vegard's law.

Artini, Cristina, E-mail: c.artini@ge.ieni.cnr.it [Dipartimento di Chimica e Chimica Industriale, Universita degli Studi di Genova, Via Dodecaneso 31, 16146 Genova (Italy); Costa, Giorgio A., E-mail: costa@chimica.unige.it [Dipartimento di Chimica e Chimica Industriale, Universita degli Studi di Genova, Via Dodecaneso 31, 16146 Genova (Italy); CNR-SPIN Genova, Corso Perrone 24, 16152 Genova (Italy); Pani, Marcella, E-mail: marcella@chimica.unige.it [Dipartimento di Chimica e Chimica Industriale, Universita degli Studi di Genova, Via Dodecaneso 31, 16146 Genova (Italy); Lausi, Andrea, E-mail: andrea.lausi@elettra.trieste.it [Sincrotrone Trieste S.C.p.A., ss 14, km 163, 5, 34149 Basovizza, Trieste (Italy); Plaisier, Jasper, E-mail: jasper.plaisier@elettra.trieste.it [Sincrotrone Trieste S.C.p.A., ss 14, km 163, 5, 34149 Basovizza, Trieste (Italy)

2012-06-15T23:59:59.000Z

264

Crystalline Electric Field as a Probe for Long-Range Antiferromagnetic Order and Superconducting State of CeFeAsO1-xFx  

SciTech Connect (OSTI)

We use inelastic neutron scattering to study the crystalline electric field (CEF) excitations of Ce{sup 3+} in CeFeAsO{sub 1-x}F{sub x} (x=0, 0.16). For nonsuperconducting CeFeAsO, the Ce CEF levels have three magnetic doublets in the paramagnetic state, but these doublets split into six singlets when the Fe ions order antiferromagnetically. For superconducting CeFeAsO{sub 0.84}F{sub 0.16} (T{sub c} = 41 K), where the static antiferromagnetic order is suppressed, the Ce CEF levels have three magnetic doublets at {h_bar}{sub {omega}} = 0, 18.7, 58.4 meV at all temperatures. Careful measurements of the intrinsic linewidth {Lambda} and the peak position of the 18.7 meV mode reveal a clear anomaly at T{sub c}, consistent with a strong enhancement of local magnetic susceptibility {chi}{double_prime}({h_bar}{sub {omega}}) below T{sub c}. These results suggest that CEF excitations in the rare-earth oxypnictides can be used as a probe of spin dynamics in the nearby FeAs planes.

Chi, Songxue [University of Tennessee, Knoxville (UTK); Adroja, D. T. [ISIS Facility, Rutherford Appleton Laboratory; GUIDI, T. [ISIS Facility, Rutherford Appleton Laboratory; Bewley, Robert I. [ISIS Facility, Rutherford Appleton Laboratory; Li, Shiliang [University of Tennessee, Knoxville (UTK); Zhao, Jun [ORNL; Lynn, J. W. [National Institute of Standards and Technology (NIST); Brown, C. M. [National Institute of Standards and Technology (NIST); Qiu, Y. [National Institute of Standards and Technology (NIST); Chen, G. F, [Beijing National Laboratory for Condensed Matter Physics, Institute of Physics; Luo, J. L. [Chinese Academy of Sciences; Wang, N. L. [Chinese Academy of Sciences; Dai, Pengcheng [ORNL

2008-01-01T23:59:59.000Z

265

SESAME 96170, a solid-liquid equation of state for CeO2  

SciTech Connect (OSTI)

I describe an equation of state (EOS) for the low-pressure solid phase and liquid phase of cerium (IV) oxide, CeO{sub 2}. The models and parameters used to calculate the EOS are presented in detail, and I compare with data for the full-density crystal. Hugoniot data are available only for high-porosity powders, and I discuss difficulties in comparing with such data. I have constructed SESAME 96170, an EOS for cerium (IV) oxide that includes the ambient solid and liquid phases. The EOS extends over the full standard SESAME range, but should not be used at low temperatures and high densities because of the lack of a high-pressure solid phase. I have described the models used to compute the three terms of the EOS (cold curve, nuclear, and thermal electronic), and I have given the parameters used in the models. They were determined by comparison with experimental data at P = 1 atm, including the constant-pressure specific heat, coefficient of thermal expansion, and melting and boiling points. The EOS compares well with data in its intended range of validity, but the presence of high-frequency optical modes in its phonon spectrum limits the agreement of our models with thermal data. The next step is to construct a multiphase EOS that includes the low- and high-pressure solid phases and the liquid. The DAC data from Duclos will most strongly constrain the parameters of the high-pressure solid. A remaining issue is the comparison of the crystal-density EOS with experimental Hugoniot data, which are taken at much lower initial data because the samples are porous powders. A satisfactory means of modeling porosity, allowing comparison of theory and experiment, has not yet been produced.

Chisolm, Eric D. [Los Alamos National Laboratory] [Los Alamos National Laboratory

2014-05-02T23:59:59.000Z

266

New Stormwater Regulations In The OC  

E-Print Network [OSTI]

to achieve that level. Some permits, however, do contain certain generic 'best management practices'). MS4 agricultural storm water discharges and return flows from irrigated agriculture. #12;Handout I I 8 NPDES Permit, changes in quality of water, and changes in the hydrologic amenities. Luna Leopold, 1968 Pre

Detwiler, Russell

267

GEOBULLETIN OcTOBEr 10Th  

E-Print Network [OSTI]

- ********************************************************** STUDENT INTERN: WISCONSIN GEOLOGICAL & NATURAL HISTORY SURVEY Job Title: Student Intern (STEM) Wage: $10 into a database as well as entering information from the field notebooks into the database. Knowledge and Skills are: The Wisconsin Geological and Natural History Survey (WGNHS) has been working to serve Wisconsin

Carlson, Anders

268

6, 16191636, 2006 OCS variations by  

E-Print Network [OSTI]

significant sulfur trace gases such as carbon disulfide (CS2), hydrogen sulphide (H2S), dimethyl sulfide (DMS ­ (CH3)2S) and sulfur dioxide5 (SO2) (Brimblecombe, 1996). This lifetime, combined with an abundance, in the form of sulfur dioxide (SO2), directly to the stratosphere (Crutzen, 1976; Ko et al., 2003). However

Boyer, Edmond

269

Temperature (oC)! Height(km)!  

E-Print Network [OSTI]

and forecasting ! ·Temperature decreases in altitude + water vapor > instabilities can develop ·Well mixed + O2 + M = O3 + M to proceed. It is M here that transfers the excess energy to the surrounding created and transported to high latitudes PSCs form in cold, dark, polar lower stratosphere PSCs process

270

GEOBULLETIN OcTOBEr 28Th  

E-Print Network [OSTI]

in the New York City area, the program will be offered by a faculty that draws from the Museum's Division anions will lower the kinetic energy barrier for dehydration of metal complexes between H2O and surface

Sheridan, Jennifer

271

NPS-OC-07-004 POSTGRADUATE  

E-Print Network [OSTI]

CODE 13. ABSTRACT (maximum 200 words) Public comments responding to the Draft Environmental Impact; distribution is unlimited. Prepared for: CNO/N45, Washington, D.C. Investigation of the impact of sonar, October 2005-January 2006 4. TITLE AND SUBTITLE: Title (Mix case letters) Investigation of the impact

272

NPS-OC-07-006 POSTGRADUATE  

E-Print Network [OSTI]

; distribution is unlimited. Prepared for: CNO/N45, Washington, D.C. Final Report for Continued Development COVERED Technical Report, 1 June 2006-31 May 2007 4. TITLE AND SUBTITLE: Title (Mix case letters) Final or the U.S. Government. 12a. DISTRIBUTION / AVAILABILITY STATEMENT Approved for public release

273

Interaction of Ce{sub 1?x}Er{sub x}O{sub 2?y} nanoparticles with SiO{sub 2}-effect of temperature and atmosphere  

SciTech Connect (OSTI)

Morphology, microstructure and phase evolution of homogeneous, nanocrystalline Ce{sub 1?x}Er{sub x}O{sub 2?x/2} mixed oxide (x=0.3 and 0.5), prepared by microemulsion method, supported on amorphous SiO{sub 2} was studied in oxidizing and reducing atmosphere by XRD, TEM, SEM-EDS and N{sub 2} adsorption. The system is structurally and chemically stable in the oxidizing atmosphere up to 1000 C, exhibiting only a small increase of the mean crystallite size of the oxide to ?4 nm. At 1100 C formation of Er silicate with unusual structure isomorphic with y-Y{sub 2}Si{sub 2}O{sub 7} (yttrialite), stabilized by Ce{sup 4+} ions was observed. In the reducing atmosphere the Ce{sub 1?x}Er{sub x}O{sub 2?x/2} reacted with SiO{sub 2} already at 900 C, due to high affinity of the reduced Ce{sup 3+} to form a silicate phase. At higher temperature the silicate crystallized into the tetragonal, low temperature A-(Ce{sub 1?x}Er{sub x}){sub 2}Si{sub 2}O{sub 7} polymorph. Such systems, containing nanocrystalline silicate particles with Er{sup 3+} ions placed in well defined sites embedded in silica matrix, may be interesting as highly efficient active components of optical waveguides amplifiers integrated with Si microelectronics. The nanocrystalline CeErO/SiO{sub 2} system prepared by the impregnation of the silica with the aqueous solution of nitrates appeared to be chemically inhomogeneous and less stable in both oxidising and reducing atmosphere. - Graphical abstract: Structure evolution of Ce{sub 0.5}Er{sub 0.5}O{sub 1.75} in air and in H{sub 2}. Display Omitted - Highlights: Homogeneous 3 nm Ce{sub 1?x}Er{sub x}O{sub 2?y} particles were prepared and uniformly dispersed on SiO{sub 2}. Er diffusion to SiO{sub 2} determines the stability of the mixed oxide in air to ?1000 C. Spreading of Ce{sub 1?x}Er{sub x}O{sub 2?y} onto SiO{sub 2} occurs in hydrogen at 900 C. Nanocrystalline A-(Ce,Er){sub 2}Si{sub 2}O{sub 7} silicate forms in H{sub 2} at 1100 C.

Kepinski, L., E-mail: L.Kepinski@int.pan.wroc.pl; Krajczyk, L.; Mista, W.

2014-01-15T23:59:59.000Z

274

Data:Ce7ce2d1-1aee-4b6e-b53c-61f5d633ed15 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revisionde0244033 No revision has

275

Transport properties of partially-filled Ce{sub y}Co{sub 4}Sb{sub 12}  

SciTech Connect (OSTI)

The authors have investigated the magnetic and transport properties of Ce{sub y}Co{sub 4}Sb{sub 12} filled skutterudites with the filling fraction y {le} 0.1. These compounds are n-type materials that develop a magnetic moment upon the presence of trivalent cerium. Cerium has a strong influence on all transport properties and even in small amounts it drastically reduces the lattice thermal conductivity. The resulting figures of merit are comparable to the values established previously for the p-type filled skutterudites.

Uher, C.; Chen, B.; Hu, S.; Morelli, D.T.; Meisner, G.P.

1997-07-01T23:59:59.000Z

276

Data:69ce9c3e-1066-4306-b704-dccfa06245b9 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revision has been approvedea02758d3 Nob05268d8cd No revisionf1fe86ce5f9ae-1b5eba546306 No

277

Data:5289eb16-08ae-4779-aef7-e948945f84ce | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3a87dcc95b Nobfef8fa58cf74865627f783 Noaad3-ec22188355fa No341c9c4152dd958 No6d1644d544e948945f84ce

278

Data:9d9aa544-afad-4985-ba5a-1093160c0ce4 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 Nod2db5b31cb44 No revision has beenfcf13f143bb No revision has been44632c851160c0ce4 No revision has

279

Data:Ce257723-a06c-4647-a520-102fafcf2c22 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision has been approved

280

Data:Ce453e06-3085-4555-bb8f-0a6eefe99579 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision hasf-0a6eefe99579 No revision has

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


281

Data:Ce7bcd1a-3552-4059-96b7-c45de0244033 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revisionde0244033 No revision has been

282

Data:Ce81fdcf-0181-4f95-8509-ee44606aaf57 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revisionde0244033 No revision

283

Data:Ce930280-ac1e-449d-8c43-c4daf70201be | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revisionde0244033 Nodaf70201be No revision has

284

Nanopattering in CeOx/Cu(111): A New Type of Surface Reconstruction and Enhancement of Catalytic Activity  

SciTech Connect (OSTI)

Our results indicate that small amounts of an oxide deposited on a stable metal surface can trigger a massive surface reconstruction under reaction conditions. In low-energy electron microscopy (LEEM) experiments, no reconstruction of Cu(111) is observed after chemisorbing oxygen or after reducing O/Cu(111) in a CO atmosphere. On the other hand, LEEM images taken in situ during the reduction of CeO{sub 2}/CuO{sub 1-x}/Cu(111) show a complex nonuniform transformation of the surface morphology. Ceria particles act as nucleation sites for the growth of copper microterraces once CuO{sub 1-x} is reduced. Can this reconstructed surface be used to enhance the catalytic activity of inverse oxide/metal catalysts? Indeed, CeO{sub x} on reconstructed Cu(111) is an extremely active catalyst for the water-gas shift process (CO + H{sub 2}O {yields} H{sub 2} + CO{sub 2}), with the Cu microterraces providing very efficient sites for the dissociation of water and subsequent reaction with CO.

Rodriguez J. A.; Senanayake, S.D.; Sadowski, J.; Evans, J.; Kundu, S.; Agnoli, S.; Yang, F.; Stacchiola, D.; Flege, J.I.; Hrbek, J.

2012-04-05T23:59:59.000Z

285

CE IGCC repowering project: Clean Coal II Project. Annual report, 1 January, 1992--31 December, 1992  

SciTech Connect (OSTI)

CE is participating in a $270 million coal gasification combined cycle repowering project that will provide a nominal 60 MW of electricity to City, Water, light and Power (CWL and P) in Springfield, Illinois. The IGCC system will consist of CE`s air-blown entrained flow two-stage gasifier; an advanced hot gas cleanup system; a combustion turbine adapted to use low-Btu gas: and all necessary coal handling equipment. The project is currently in the second budget period of five. The major activities during this budgeted period are: Establishment of an approved for design (AFD) engineering package; development of a detailed cost estimate; resolution of project business issues; CWL and P renewal and replacement activities; and application for environmental air permits. The Project Management Plan was updated. The conceptual design of the plant was completed and a cost and schedule baseline for the project was established previously in Budget Period One. This information was used to establish AFD Process Flow Diagrams, Piping and Instrument Diagrams, Equipment Data Sheets, material take offs, site modification plans and other information necessary to develop a plus or minus 20% cost estimate. Environmental permitting activities are continuing. At the end of 1992 the major activities remaining for Budget Period two is to finish the cost estimate and complete the Continuation Request Documents.

Not Available

1993-12-01T23:59:59.000Z

286

Rapid Microwave Preparation of Highly Efficient Ce[superscript 3+]-Substituted Garnet Phosphors for Solid State White Lighting  

SciTech Connect (OSTI)

Ce{sup 3+}-substituted aluminum garnet compounds of yttrium (Y{sub 3}Al{sub 5}O{sub 12}) and lutetium (Lu{sub 3}Al{sub 5}O{sub 12}) - both important compounds in the generation of (In,Ga)N-based solid state white lighting - have been prepared using a simple microwave heating technique involving the use of a microwave susceptor to provide the initial heat source. Carbon used as the susceptor additionally creates a reducing atmosphere around the sample that helps stabilize the desired luminescent compound. High quality, phase-pure materials are prepared within a fraction of the time and using a fraction of the energy required in a conventional ceramic preparation; the microwave technique allows for a reduction of about 95% in preparation time, making it possible to obtain phase pure, Ce{sup 3+}-substituted garnet compounds in under 20 min of reaction time. It is estimated that the overall reduction in energy compared with ceramic routes as practiced in the lab is close to 99%. Conventionally prepared material is compared with material prepared using microwave heating in terms of structure, morphology, and optical properties, including quantum yield and thermal quenching of luminescence. Finally, the microwave-prepared compounds have been incorporated into light-emitting diode 'caps' to test their performance characteristics in a real device, in terms of their photon efficiency and color coordinates.

Birkel, Alexander; Denault, Kristin A.; George, Nathan C.; Doll, Courtney E.; Hry, Bathylle; Mikhailovsky, Alexander A.; Birkel, Christina S.; Hong, Byung-Chul; Seshadri, Ram (UCSB); (Mitsubishi)

2012-04-30T23:59:59.000Z

287

Preparation and luminescence characterization of GGAG:Ce{sup 3+},B{sup 3+} for a white light-emitting diode  

SciTech Connect (OSTI)

We prepared Gd{sub 3}Ga{sub 2}Al{sub 3}O{sub 12} (GGAG) co-doped with trivalent cerium and boron ions and investigated its luminescence properties as a function of the B{sup 3+} concentration. The luminescence intensity was enhanced markedly by adding B{sup 3+} as a co-dopant. The non-boron-doped GGAG:Ce{sup 3+} converted less than 10% of the absorbed blue light into luminescence. As the B{sup 3+} concentration increased, Q increased and reached a maximum of Q = 21% at 1.5 moles in GGAG:Ce{sup 3+}. White light closer to daylight with good color-rendering index properties was generated with the proper combination of yellow emission from GGAG:Ce{sup 3+},B{sup 3+} and blue emission from a GaN chip.

Kang, Jun-Gill [Department of Chemistry, Chungnam National University, Daejeon 305-764 (Korea, Republic of)], E-mail: jgkang@cnu.ac.kr; Kim, Myung-Kyo [Alti-Electronics Co., Ltd., 90-1 Bongmyung-Ri, Namsa-Myun, Youngin, Gyeonggi-Do 449-882 (Korea, Republic of); Kim, Kwang-Bok [Kumho Electric, Inc., 64-1, Bongmyung-Ri, Namsa-Myun, Youngin, Gyeonggi-Do 449-883 (Korea, Republic of)

2008-08-04T23:59:59.000Z

288

Oxide-ion conductivity in Cu {sub x}Ce{sub 1-x}O{sub 2-{delta}} (0 {<=} x {<=} 0.10)  

SciTech Connect (OSTI)

Up to 10 at.% of copper readily substitutes for cerium in ceria. It is found that at oxygen partial pressures between 0.21 atm and 10{sup -5} atm, Cu {sub x}Ce{sub 1-x}O{sub 2-{delta}} (0 {<=} x {<=} 0.10) solid solution behave as an oxide-ion electrolyte. Interestingly, Cu{sub 0.10}Ce{sub 0.90}O{sub 2-{delta}} exhibits the oxide-ion conductivity of ca. 10{sup -4} {omega}{sup -1} cm{sup -1} at 600 deg. C at an oxygen partial pressure of 10{sup -5} atm.

Gayen, Arup [Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012 (India); Priolkar, K.R. [Department of Physics, Goa University, Taleigao Plateau, Goa 403206 (India); Shukla, A.K. [Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012 (India); Ravishankar, N. [Materials Research Centre, Indian Institute of Science, Bangalore 560012 (India); Hegde, M.S. [Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012 (India)]. E-mail: mshegde@sscu.iisc.ernet.in

2005-03-08T23:59:59.000Z

289

Lu.sub.1-xI.sub.3:Ce.sub.x-a scintillator for gamma-ray spectroscopy and time-of-flight pet  

DOE Patents [OSTI]

The present invention includes very fast scintillator materials including lutetium iodide doped with Cerium (Lu.sub.1-xI.sub.3:Ce.sub.x; LuI.sub.3:Ce). The LuI.sub.3 scintillator material has surprisingly good characteristics including high light output, high gamma-ray stopping efficiency, fast response, low cost, good proportionality, and minimal afterglow that the material is useful for gamma-ray spectroscopy, medical imaging, nuclear and high energy physics research, diffraction, non-destructive testing, nuclear treaty verification and safeguards, and geological exploration.

Shah, Kanai S. (Newton, MA)

2008-02-12T23:59:59.000Z

290

Ks-band detection of thermal emission and color constraints to CoRoT-1b: A low-albedo planet with inefficient atmospheric energy redistribution and a temperature inversion  

E-Print Network [OSTI]

We report the detection in Ks-band of the secondary eclipse of the hot Jupiter CoRoT-1b, from time series photometry with the ARC 3.5-m telescope at Apache Point Observatory. The eclipse shows a depth of 0.336+/-0.042 percent and is centered at phase 0.5022 (+0.0023,-0.0027), consistent with a zero eccentricity orbit ecos{\\omega} = 0.0035 (+0.0036,-0.0042). We perform the first optical to near-infrared multi-band photometric analysis of an exoplanet's atmosphere and constrain the reflected and thermal emissions by combining our result with the recent 0.6, 0.71, and 2.09 micron secondary eclipse detections by Snellen et al. (2009), Gillon et al. (2009), and Alonso et al. (2009a). Comparing the multi-wavelength detections to state-of-the-art radiative-convective chemical-equilibrium atmosphere models, we find the near-infrared fluxes difficult to reproduce. The closest blackbody-based and physical models provide the following atmosphere parameters: a temperature T = 2454 (+84,-170) K, a very low Bond albedo A_B...

Rogers, Justin C; Lopez-Morales, Mercedes; Sing, David K; Burrows, Adam

2009-01-01T23:59:59.000Z

291

Computing in SCienCe & engineering This arTicle has been peer-reviewed. 13 R e p r o d u c i b l e R e s e a r c h  

E-Print Network [OSTI]

Computing in SCienCe & engineering This arTicle has been peer-reviewed. 13 R e p r o d u c i b l e as well as some efforts and approaches to overcome them. #12;14 Computing in SCienCe & engineering in 2011; a panel discussion at the International Biometric Society meeting in 2011 featured re- producibility

LeVeque, Randy

292

Hydrogen activation, diffusion, and clustering on CeO{sub 2}(111): A DFT+U study  

SciTech Connect (OSTI)

We present a comprehensive density functional theory+U study of the mechanisms underlying the dissociation of molecular hydrogen, and diffusion and clustering of the resulting atomic species on the CeO{sub 2}(111) surface. Contrary to a widely held view based solely on a previous theoretical prediction, our results show conclusively that H{sub 2} dissociation is an activated process with a large energy barrier ?1.0 eV that is not significantly affected by coverage or the presence of surface oxygen vacancies. The reaction proceeds through a local energy minimum where the molecule is located close to one of the surface oxygen atoms and the HH bond has been substantially weaken by the interaction with the substrate , and a transition state where one H atom is attached to a surface O atom and the other H atom sits on-top of a Ce{sup 4+} ion. In addition, we have explored how several factors, including H coverage, the location of Ce{sup 3+} ions as well as the U value, may affect the chemisorption energy and the relative stability of isolated OH groups versus pair and trimer structures. The trimer stability at low H coverages and the larger upward relaxation of the surface O atoms within the OH groups are consistent with the assignment of the frequent experimental observation by non-contact atomic force and scanning tunneling microscopies of bright protrusions on three neighboring surface O atoms to a triple OH group. The diffusion path of isolated H atoms on the surface goes through the adsorption on-top of an oxygen in the third atomic layer with a large energy barrier of ?1.8 eV. Overall, the large energy barriers for both, molecular dissociation and atomic diffusion, are consistent with the high activity and selectivity found recently in the partial hydrogenation of acetylene catalyzed by ceria at high H{sub 2}/C{sub 2}H{sub 2} ratios.

Fernndez-Torre, Delia [Departamento de Fsica Terica de la Materia Condensada, Universidad Autnoma de Madrid, E-28049 Madrid (Spain); Instituto de Estructura de la Materia, CSIC, C/ Serrano 121, E-28006 Madrid (Spain); Carrasco, Javier [CIC Energigune, Albert Einstein 48, 01510 Miano, lava (Spain); Instituto de Catlisis y Petroleoqumica, CSIC, C/ Marie Curie 2, E-28049 Madrid (Spain); Ganduglia-Pirovano, M. Vernica [Instituto de Catlisis y Petroleoqumica, CSIC, C/ Marie Curie 2, E-28049 Madrid (Spain); Prez, Rubn, E-mail: ruben.perez@uam.es [Departamento de Fsica Terica de la Materia Condensada, Universidad Autnoma de Madrid, E-28049 Madrid (Spain); Condensed Matter Physics Center (IFIMAC), Universidad Autnoma de Madrid, E-28049 Madrid (Spain)

2014-07-07T23:59:59.000Z

293

COU N T Y RO A  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed New Substation Sites Proposed Route BTRICGEGR-N Goods PO 1PhotoemissionCOST

294

Ingenieurb ro Henning Holst | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector GeneralDepartmentAUDIT REPORTOpen EnergyBoard"Starting a newIGUSLLCDivision of OilforHenning

295

Microsoft Word - knuteson-ro.doc  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: VegetationEquipment SurfacesResource Program PreliminaryA Trimodal Size DistributionARM Total

296

Sensitive Property RO 23_120213.xlsx  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administrationcontroller systemsBi (2) SrEvaluating theDepartment of EnergyImmunoassaysSensitive

297

Accountable Property RO23_120213.xlsx  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAbout the Building Technologies Office WorkshopYourAccomplishnents -

298

Property List for RO Code '37', EDI  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 - SeptemberMicroneedles for4-16HamadaBaO/Al2O3 lean NOxRecycling Bins |

299

Electronic and thermoelectric properties of Ce{sub 3}Te{sub 4} and La{sub 3}Te{sub 4} computed with density functional theory with on-site Coulomb interaction correction  

SciTech Connect (OSTI)

The electronic properties and Seebeck coefficients of Ce{sub 3}Te{sub 4} and La{sub 3}Te{sub 4} are computed using Density Functional Theory with on-site Coulomb interaction correction. We found that the Seebeck coefficients of Ce{sub 3}Te{sub 4} and La{sub 3}Te{sub 4} are almost equal at temperatures larger than the Curie temperature of Ce{sub 3}Te{sub 4}, and in good agreement with the measurements reported by May et al. [Phys. Rev. B 86, 035135 (2012)]. At temperatures below the Curie temperature, the Seebeck coefficient of Ce{sub 3}Te{sub 4} increases due to the ferromagnetic ordering, which leads the f-electron of Ce to contribute to the Seebeck coefficient in the relevant range of electron concentration.

Vo, Trinh; Allmen, Paul von; Huang, Chen-Kuo; Ma, James; Bux, Sabah; Fleurial, Jean-Pierre [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109 (United States)

2014-10-07T23:59:59.000Z

300

Adsorbate effects on a mixed-valence compound: Carbon monoxide chemisorption on CeIr/sub 2/  

SciTech Connect (OSTI)

We have studied the effects of stoichiometry change and CO chemisorption on the surface electronic structure of the mixed-valence compound CeIr/sub 2/. We show that the surface iridium to cerium ratio can be varied by changing sample temperature while sputtering. Carbon monoxide is found to adsorb 80% molecularly on the surface and cause a mild surface oxidation which induces a shift of electron density into available cerium f orbitals. Peaks due to the 4sigma, 1..pi.., and 5sigma CO molecular orbitals appear at different binding energies than those due to molecular CO on the pure iridium surface. This binding-energy shift as well as the high percentage of molecular CO on the surface (CO adsorption on pure cerium is completely dissociative) points toward a surface which has lost much of the elemental character of its two constituents upon compound formation.

Lindquist, J.M.; Hemminger, J.C.; Lawrence, J.

1987-10-15T23:59:59.000Z

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


301

Adsorbate effects on a mixed-valence compound: carbon monoxide chemisorption on CeIr/sub 2/  

SciTech Connect (OSTI)

The authors studied the effects of stoichiometry change and CO chemisorption on the surface electronic structure of the mixed-valence compound CeIr/sub 2/. It is shown that the surface iridium to cerium ratio can be varied by changing sample temperature while sputtering. Carbon monoxide is found to adsorb 80% molecularly on the surface and cause a mild surface oxidation which induces a shift of electron density into available cerium f orbitals. Peaks due to the 4 sigma, 1 pi, and 5 sigma CO molecular orbitals appear at different binding energies than those due to molecular CO on the pure iridium surface. This binding-energy shift as well as the high percentage of molecular CO on the surface (CO adsorption on pure cerium is completely dissociative) points toward a surface which has lost much of the elemental character of its two constituents upon compound formation.

Lindquist, J.M.; Hemminger, J.C.

1987-10-15T23:59:59.000Z

302

Effect of CeO{sub 2} buffer layer on the microstructure and magnetic properties of yttrium iron garnet film on Si substrate  

SciTech Connect (OSTI)

Yttrium iron garnet films were grown by radio frequency magnetron sputtering on Si(111) substrate with and without CeO{sub 2} buffer layer, and influence of CeO{sub 2} buffer on the microstructure and magnetic behaviors of the films were investigated. As compared with the film without buffer, a larger saturation magnetizaton (M{sub s}), lower coercive force (H{sub c}), and higher remnant magnetization (M{sub r}) were obtained due to the introduction of CeO{sub 2} layer. The higher M{sub s} results from the denser structure and the smaller content of Fe{sup 2+} ions. The lower H{sub c} and higher M{sub r} can be explained by the small surface roughness and crystal grains size. The film on CeO{sub 2} buffer layer possess fine microstructure and its surface roughness is smaller than the unbuffered films, which provides an increased exchange between the crystal grains and an enhanced spontaneous magnetization effect, leading to the higher remnant magnetization.

Yang Qinghui; Zhang Huaiwu; Wen Qiye; Liu Yingli [State Key Laboratory of Electronic Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054 (China); Xiao, John Q. [Department of Physics and Astronomy, University of Delaware, Newark, Delaware, 19716 (United States)

2009-04-01T23:59:59.000Z

303

UV absorption properties of ceria-modified compositions within the fluorite-type solid solution CeO{sub 2}-Y{sub 6}WO{sub 12}  

SciTech Connect (OSTI)

A new fluorite-type solid solution domain has been evidenced in the system (1-x) CeO{sub 2}-x/7 Y{sub 6}WO{sub 12}{open_square}{sub 2} using the amorphous citrate route. All the studied phases (0{<=}x{<=}1) crystallize in a cubic-type symmetry. Diffuse reflectance spectra reveal a strong optical absorption between 380 and 400 nm. All substituted compositions spectral selectivities are estimated suitable for application as inorganic UV absorbers. The non linear variation observed in the optical gap values between Y{sub 6}WO{sub 12} and CeO{sub 2} is attributed to the presence of the cerium 4f-block band. Additionally, Time Resolved Microwave Conductivity (TRMC) experiment and phenol photodegradation analyses carried out on the Ce{sub 0.81}Y{sub 0.16}W{sub 0.03}O{sub 1.95}{open_square}{sub 0.05} (x=0.19) composition do not indicate any photocalatytic activity for this material. - Graphical abstract: Diffuse reflectance spectra of the Ce-Y-W-O samples calcined at 1000 deg. C.

Chevire, Francois [UMR CNRS 6226 'Sciences Chimiques de Rennes', equipe 'Verres et Ceramiques', Universite de Rennes 1, 35042 Rennes cedex (France); Munoz, Francisco [UMR CNRS 6226 'Sciences Chimiques de Rennes', equipe 'Verres et Ceramiques', Universite de Rennes 1, 35042 Rennes cedex (France); Baker, Charles F. [UMR CNRS 6226 'Sciences Chimiques de Rennes', equipe 'Verres et Ceramiques', Universite de Rennes 1, 35042 Rennes cedex (France); Tessier, Franck [UMR CNRS 6226 'Sciences Chimiques de Rennes', equipe 'Verres et Ceramiques', Universite de Rennes 1, 35042 Rennes cedex (France)]. E-mail: Franck.Tessier@univ-rennes1.fr; Larcher, Olivier [UMR CNRS 6226 'Sciences Chimiques de Rennes', equipe 'Verres et Ceramiques', Universite de Rennes 1, 35042 Rennes cedex (France); Boujday, Souhir [Laboratoire d'Ingenierie des Materiaux et des Hautes Pressions, CNRS UPR 1311, Universite Paris 13, 99 Avenue J. B. Clement, 93430 Villetaneuse (France); Colbeau-Justin, Christophe [Laboratoire d'Ingenierie des Materiaux et des Hautes Pressions, CNRS UPR 1311, Universite Paris 13, 99 Avenue J. B. Clement, 93430 Villetaneuse (France); Marchand, Roger [UMR CNRS 6226 'Sciences Chimiques de Rennes', equipe 'Verres et Ceramiques', Universite de Rennes 1, 35042 Rennes cedex (France)

2006-10-15T23:59:59.000Z

304

TP HTML -CSS -PHP -POSTGRESQL Le but de ce TP est de complter les fichiers fournis pour raliser une micro application interactive qui  

E-Print Network [OSTI]

TP HTML - CSS - PHP - POSTGRESQL Le but de ce TP est de compléter les fichiers fournis pour afficher (fichiers .html ou .php). · Enregistrez dans votre home l'archive contenant les fichiers du TP à partir de http://perso.limsi.fr/annlor/enseignement/ensiie/pw/tpPHP.tar · Extrayez de l'archive le

Ligozat, Anne-Laure

305

The Institute for Integrated Cell-Material Sciences (iCeMS) was founded in 2007 as part of a government program called the World Premier International  

E-Print Network [OSTI]

, Sports, Science and Technology (MEXT) of Japan. The fund provides a total of 6 million dollars per year science. iCeMS is one of nine WPI centers throughout Japan and boasts eighteen world-renowned principal investigators, who are leading experts in cell biology, chemistry, and physics. Notably, Kyoto University Center

Takada, Shoji

306

Electronic Structure of CeFeAsO1-xFx (x=0, 0.11/x=0.12) compounds  

SciTech Connect (OSTI)

We report an extensive study on the intrinsic bulk electronic structure of the high-temperature superconductor CeFeAsO{sub 0.89}F{sub 0.11} and its parent compound CeFeAsO by soft and hard x-ray photoemission, x-ray absorption and soft-x-ray emission spectroscopies. The complementary surface/bulk probing depth, and the elemental and chemical sensitivity of these techniques allows resolving the intrinsic electronic structure of each element and correlating it with the local structure, which has been probed by extended-x-ray absorption fine structure spectroscopy. The measurements indicate a predominant 4f{sup 1} (i.e. Ce{sup 3+}) initial state configuration for Cerium and an effective valence-band-to-4f charge-transfer screening of the core hole. The spectra also reveal the presence of a small Ce f{sup 0} initial state configuration, which we assign to the occurrence of an intermediate valence state. The data reveal a reasonably good agreement with the partial density of states as obtained in standard density functional calculations over a large energy range. Implications for the electronic structure of these materials are discussed.

Bondino, F.; Magnano, E.; Booth, C. H.; Offi, F.; Panaccione, G.; Malvestuto, M.; Paolicelli, G.; Simonelli, L.; Parmigiani, F.; McGuire, M. A.; Sefat, A. S.; Sales, B. C.; Jin, R.; Vilmercati, P.; Mandrus, D.; Singh, D. J.; Mannella, N.

2011-01-25T23:59:59.000Z

307

Un atlas smantique pour le cerveau Un des buts principaux de ce projet est le dveloppement d'un outil qui permettra  

E-Print Network [OSTI]

Un atlas sémantique pour le cerveau Un des buts principaux de ce projet est le développement d construire des représentations sémantiques à partir de large corpus de textes (les Atlas sémantiques (AS

Institut des Sciences Cognitives, CNRS

308

VI INTERNATIONAL TELECOMMUNICATIONS SYMPOSIUM (ITS2006), SEPTEMBER 3-6, 2006, FORTALEZA-CE, BRAZIL 1 Fringe Benefits of the H.264/AVC  

E-Print Network [OSTI]

of the Motion Picture Experts Groups (MPEG) from the International Standards Organization (ISO) and of the VideoVI INTERNATIONAL TELECOMMUNICATIONS SYMPOSIUM (ITS2006), SEPTEMBER 3-6, 2006, FORTALEZA-CE, BRAZIL, and Tiago A. Fonseca Abstract-- H.264/AVC is the newest, state-of-the-art, video compression standard

de Queiroz, Ricardo L.

309

Effect of CeO{sub 2} addition on the properties of FeAl based alloy produced by mechanical alloying technique  

SciTech Connect (OSTI)

Iron aluminides based on FeAl is notable for their low materials cost, ease of fabrication and good corrosion, suffixation and oxidation resistance. However, the application based on these unique properties still require the development of Fe-Al based alloy since it shows some drawbacks such as a lack of high temperature strength and low ductility. To improve the mechanical properties of FeAl based alloy, ceria (CeO{sub 2}) will be added to this compound. FeAl based alloy produced by the mechanical alloying (MA) technique. The developed specimens then assessed with respect to oxidation behaviour in high temperature, scale microstructure and hardness. The surface morphologies of the alloy evaluated and observed using scanning electron microscopy (SEM) with an energy dispersive X-ray spectroscopy (EDX). The phase structures of oxide scale formed on them were identified by X-ray diffraction (XRD). The results found that the FeAl intermetallic compound containing CeO{sub 2} 0.5 wt.% is less pores and CeO{sub 2} 1.0 wt.% is more homogen in powder and solid form, higher hardness and increase in their resistance to oxidation behaviour in high temperature compared with another percentage of CeO{sub 2}.

Khaerudini, Deni S.; Muljadi,; Sardjono, P.; Tetuko, Anggito P.; Sebayang, P.; Ginting, M. [Research Center for Physics, Indonesian Institute of Sciences (LIPI) Gd. 440, Kawasan Puspiptek Serpong Tangerang 15314 Banten (Indonesia)] [Research Center for Physics, Indonesian Institute of Sciences (LIPI) Gd. 440, Kawasan Puspiptek Serpong Tangerang 15314 Banten (Indonesia)

2013-09-03T23:59:59.000Z

310

IFT1227, Architecture des ordinateurs 1: Ce devoir vous permet de manipuler les robots equipes de la -chip PIC18F4550 presentes en demo.  

E-Print Network [OSTI]

IFT1227, Architecture des ordinateurs 1: Devoir 3 Ce devoir vous permet de manipuler les robots robot soit attir´e ou suive une lumi`ere relativement forte (une lampe de poche ou autre mise devant lui). 1 Comportement basique Votre programme devra fournir le comportement suivant : ­ Quand le robot

Boyer, Michel

311

plan de polarisation de 18', en sens contraire du courant qui anime l'lecuro-aimant. On peut comparer ce rsultat avec l'effet produit  

E-Print Network [OSTI]

celle que produit directement l'acier, ce qui donne pour l'effet de la lame 50' au lieu de 48', nombre un champ magntique et du phnomne de Peltier. L'exprience de M. Hall est rpte au moyen d

Paris-Sud XI, Universit de

312

CE IGCC Repowering Project: Use of the Lockheed Kinetic Extruder for coal feeding; Topical report, June 1993  

SciTech Connect (OSTI)

ABB CE is evaluating alternate methods of coal feed across a pressure barrier for its pressurized coal gasification process. The Lockheed Kinetic Extruder has shown to be one of the most promising such developments. In essence, the Kinetic Extruder consists of a rotor in a pressure vessel. Coal enters the rotor and is forced outward to the surrounding pressure vessel by centrifugal force. The force on the coal passing across the rotor serves as a pressure barrier. Should this technology be successfully developed and tested, it could reduce the cost of IGCC technology by replacing the large lockhoppers conventionally used with a much smaller system. This will significantly decrease the size of the gasifier island. Kinetic Extruder technology needs testing over an extended period of time to develop and prove the long term reliability and performance needed in a commercial application. Major issues to be investigated in this program are component design for high temperatures, turn-down, scale-up factors, and cost. Such a test would only be economically feasible if it could be conducted on an existing plant. This would defray the cost of power and feedstock. Such an installation was planned for the CE IGCC Repowering Project in Springfield, Illinois. Due to budgetary constraints, however, this provision was dropped from the present plant design. It is believed that, with minor design changes, a small scale test version of the Kinetic Extruder could be installed parallel to an existing lockhopper system without prior space allocation. Kinetic Extruder technology represents significant potential cost savings to the IGCC process. For this reason, a test program similar to that specified for the Springfield project would be a worthwhile endeavor.

NONE

1994-02-01T23:59:59.000Z

313

Patrick S. Pabian PT, DPT, SCS, OCS, CSCS Patrick S. Pabian PT, DPT, SCS, OCS, CSCS  

E-Print Network [OSTI]

of Illinois / Great Plains Sports Medicine & Rehabilitation. Peoria, IL. September 2000 to January 2002. Augustine, Florida. April 2007. Bachelor Science in Physical Therapy. Bradley University, Peoria IL. August. Physical Therapist. St. Margaret's Hospital. Spring Valley, IL. August 2000 to Sept 2000. Specialty

Wu, Shin-Tson

314

Patrick S. Pabian PT, DPT, SCS, OCS, CSCS Patrick S. Pabian PT, DPT, SCS, OCS, CSCS  

E-Print Network [OSTI]

. Orthopedic Institute of Illinois / Great Plains Sports Medicine & Rehabilitation. Peoria, IL. September 2000. Augustine, Florida. April 2007. Bachelor Science in Physical Therapy. Bradley University, Peoria IL. August to January 2002. Physical Therapist. St. Margaret's Hospital. Spring Valley, IL. August 2000 to Sept 2000

Wu, Shin-Tson

315

SYSTMES SOLAIRES le journal des nergies renouvelables N 186 2008 B A RO M T R E D E S D C H E T S M U N I C I PAU X S O L I D E S R E N O U V E L A B L E S J U I L L E T 2008  

E-Print Network [OSTI]

valorisé en énergie est en constante augmentation. Eurostat estime ce volume à 48,4 millions de tonnes pour grande disparité au niveau des pays européens. D'un côté, des ?tats prati- quent à grande échelle l

Columbia University

316

Gold, Copper, and Platinum Nanoparticles Dispersed on CeOx/TiO2(110) Surfaces: High Water-Gas Shift Activity and the Nature of the Mixed-Metal Oxide at the Nanometer Level  

SciTech Connect (OSTI)

At small coverages of ceria on TiO{sub 2}(110), the CeO{sub x} nanoparticles have an unusual coordination mode. Scanning tunneling microscopy and density-functional calculations point to the presence of Ce{sub 2}O{sub 3} dimers, which form diagonal arrays that have specific orientations of 0, 24, and 42{sup o} with respect to the [1 -1 0] direction of the titania substrate. At high coverages of ceria on TiO{sub 2}(110), the surface exhibits two types of terraces. In one type, the morphology is not very different from that observed at low ceria coverage. However, in the second type of terrace, there is a compact array of ceria particles with structures that do not match the structures of CeO{sub 2}(111) or CeO{sub 2}(110). The titania substrate imposes on the ceria nanoparticles nontypical coordination modes, enhancing their chemical reactivity. This phenomenon leads to a larger dispersion of supported metal nanoparticles (M = Au, Cu, Pt) and makes possible the direct participation of the oxide in catalytic reactions. The M/CeO{sub x}/TiO{sub 2}(110) surfaces display an extremely high catalytic activity for the water-gas shift reaction that follows the sequence Au/CeO{sub x}/TiO{sub 2}(110) < Cu/CeO{sub x}/TiO{sub 2}(110) < Pt/CeO{sub x}/TiO{sub 2}(110). For low coverages of Cu and CeO{sub x}, Cu/CeO{sub x}/TiO{sub 2}(110) is 8-12 times more active than Cu(111) or Cu/ZnO industrial catalysts. In the M/CeO{sub x}/TiO{sub 2}(110) systems, there is a strong coupling of the chemical properties of the admetal and the mixed-metal oxide: The adsorption and dissociation of water probably take place on the oxide, CO adsorbs on the admetal nanoparticles, and all subsequent reaction steps occur at the oxide-admetal interface. The high catalytic activity of the M/CeO{sub x}/TiO{sub 2}(110) surfaces reflects the unique properties of the mixed-metal oxide at the nanometer level.

Park, J.; Graciani, J; Evans, J; Stacchiola, D; Senanayake, S; Barrio, L; Liu, P; Fdez. Sanz, J; Hrbek, J; Rodriguez, J

2010-01-01T23:59:59.000Z

317

Gold, Copper and Platinum Nanoparticles Dispersed on CeOx/TiO2(110) Surfaces: High Water-Gas Shift Activity and the Nature of the Mixed-Metal Oxide at the Nanometer Level  

SciTech Connect (OSTI)

At small coverages of ceria on TiO{sub 2}(110), the CeO{sub x} nanoparticles have an unusual coordination mode. Scanning tunneling microscopy and density-functional calculations point to the presence of Ce{sub 2}O{sub 3} dimers, which form diagonal arrays that have specific orientations of 0, 24, and 42{sup o} with respect to the [1 -1 0] direction of the titania substrate. At high coverages of ceria on TiO{sub 2}(110), the surface exhibits two types of terraces. In one type, the morphology is not very different from that observed at low ceria coverage. However, in the second type of terrace, there is a compact array of ceria particles with structures that do not match the structures of CeO{sub 2}(111) or CeO{sub 2}(110). The titania substrate imposes on the ceria nanoparticles nontypical coordination modes, enhancing their chemical reactivity. This phenomenon leads to a larger dispersion of supported metal nanoparticles (M = Au, Cu, Pt) and makes possible the direct participation of the oxide in catalytic reactions. The M/CeO{sub x}/TiO{sub 2}(110) surfaces display an extremely high catalytic activity for the water-gas shift reaction that follows the sequence Au/CeO{sub x}/TiO{sub 2}(110) < Cu/CeO{sub x}/TiO{sub 2}(110) < Pt/CeO{sub x}/TiO{sub 2}(110). For low coverages of Cu and CeO{sub x}, Cu/CeO{sub x}/TiO{sub 2}(110) is 8-12 times more active than Cu(111) or Cu/ZnO industrial catalysts. In the M/CeO{sub x}/TiO{sub 2}(110) systems, there is a strong coupling of the chemical properties of the admetal and the mixed-metal oxide: The adsorption and dissociation of water probably take place on the oxide, CO adsorbs on the admetal nanoparticles, and all subsequent reaction steps occur at the oxide-admetal interface. The high catalytic activity of the M/CeO{sub x}/TiO{sub 2}(110) surfaces reflects the unique properties of the mixed-metal oxide at the nanometer level.

Rodriguez, J.A.; Park, J.B.; Graciani, J.; Evans, J.; Stacchiola, D.; Senanayake, S.D.; Barrio, L.; Liu, P.; Sanz, J.F.; Hrbek, J.

2010-01-13T23:59:59.000Z

318

Substitution effect on the magnetic and transport properties of CeNi{sub 0.8?x}Mn{sub x}Bi{sub 2}  

SciTech Connect (OSTI)

We report the results of Mn substitution for Ni in CeNi{sub 0.8}Bi{sub 2} (i.e., CeNi{sub 0.8?x}Mn{sub x}Bi{sub 2}). All the samples have an antiferromagnetic ordered state below T{sub N}?=?5.0?K due to localized 4f-magnetic moment on the Ce ions. Besides this antiferromagnetic ordering caused by Ce, the magnetic and transport properties are abruptly changed with increasing Mn contents at the boundary composition of x?=?0.4. The magnetic state is changed into a ferromagnetic state around 200?K for x?>?0.4, where the electrical resistivity is strongly suppressed to become simple metallic. These results of ferromagnetism and metallicity can be explained by the double exchange mechanism, rather than the simple picture of Doniach phase diagram. The mixed valence states of Ni and Mn ions are confirmed by X-ray photoelectron spectroscopy. For x???0.4, the initial Ni{sup 3+} state gradually changes to the Ni{sup 2+} state with increasing x up to 0.4. On further increase of x?>?0.4, the Ni{sup 2+} state is replaced by the Mn{sup 2+} state, which gradually changes to the final Mn{sup 3+} state. We also present an inelastic neutron scattering (INS) measurements on CeNi{sub 0.8}Bi{sub 2} (i.e., x?=?0) between 1.2 and 12?K. The high energy INS study reveals the presence of two well-defined crystal electric field (CEF) excitations near 9?meV and 19?meV at 1.2?K and 6?K, while the low energy INS study reveals the presence of quasielastic scattering above 4?K. We will discuss our INS results of CeNi{sub 0.8}Bi{sub 2} based on the CEF model.

Kim, Soo-Whan; Lee, Kyujoon; Jung, Myung-Hwa, E-mail: mhjung@sognag.ac.kr [Department of Physics, Sogang University, Seoul 121-742 (Korea, Republic of); Adroja, D. T. [ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX (United Kingdom); Highly Correlated Matter Research Group, Physics Department, University of Johannesburg, P.O. Box 524, Auckland Park 2006 (South Africa); Demmel, F.; Taylor, J. W. [ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX (United Kingdom)

2014-08-21T23:59:59.000Z

319

Powder preparation and UV absorption properties of selected compositions in the CeO{sub 2}-Y{sub 2}O{sub 3} system  

SciTech Connect (OSTI)

Several approaches have been investigated to prepare fluorite-type compositions within the (1-x) CeO{sub 2}-xYO{sub 1.5} system. The optical properties of the resulting modified-ceria materials have been characterized in order to evaluate their potential abilities as inorganic UV absorbers. Diffuse reflectance analyses reveal a strong optical absorption between 390 and 400 nm for all substituted compositions and the spectral selectivities are estimated suitable for the targeted application. Additionally, time resolved microwave conductivity (TRMC) and phenol photodegradation analyses do not indicate any photocalatytic activity for these compositions. Aqueous colloidal suspensions of the Ce{sub 0.7}Y{sub 0.3}O{sub 1.85} UV absorber have been carried out. - Graphical abstract: Comparison between diffuse reflectance spectra of ceria (x=0) and yttrium modified ceria (x=0.3)

Tessier, Franck [UMR CNRS 6226 'Sciences Chimiques de Rennes', equipe 'Verres et Ceramiques', Universite de Rennes 1, 35042 Rennes cedex (France)], E-mail: Franck.Tessier@univ-rennes1.fr; Chevire, Francois; Munoz, Francisco; Merdrignac-Conanec, Odile; Marchand, Roger [UMR CNRS 6226 'Sciences Chimiques de Rennes', equipe 'Verres et Ceramiques', Universite de Rennes 1, 35042 Rennes cedex (France); Bouchard, Michel; Colbeau-Justin, Christophe [Laboratoire d'Ingenierie des Materiaux et des Hautes Pressions, CNRS UPR 1311, Universite Paris 13, 99 Avenue J.B. Clement, 93430 Villetaneuse (France)

2008-05-15T23:59:59.000Z

320

Lu1-xI3:Cex--a scintillator for gamma ray spectroscopy and time-of-flight PET  

DOE Patents [OSTI]

The present invention concerns very fast scintillator materials comprising lutetium iodide doped with Cerium (Lu1-xI3:Cex; LuI3:Ce). The LuI3 scintillator material has surprisingly good characteristics including high light output, high gamma ray stopping efficiency, fast response, low cost, good proportionality, and minimal afterglow that the material is useful for gamma ray spectroscopy, medical imaging, nuclear and high energy physics research, diffraction, non-destructive testing, nuclear treaty verification and safeguards, and geological exploration. The timing resolution of the scintillators of the present invention provide compositions capable of resolving the position of an annihilation event within a portion of a human body cross-section.

Shah, Kanai S.

2007-02-06T23:59:59.000Z

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


321

Fabrication of CeO2 by sol-gel process based on microfluidic technology as an analog preparation of ceramic nuclear fuel microspheres  

E-Print Network [OSTI]

Microfluidics integrated with sol-gel processes is introduced in preparing monodispersed MOX nuclear fuel microspheres using nonactive cerium as a surrogate for uranium or plutonium. The detailed information about microfluidic devices and sol-gel processes are provided. The effects of viscosity and flow rate of continuous and dispersed phase on size and size distribution of CeO2 microspheres have been investigated. A comprehensive characterization of the CeO2 microspheres has been conducted, including XRD pattern, SEM, density, size and size distribution. The size of prepared monodisperse particles can be controlled precisely in range of 10{\\mu}m to 1000{\\mu}m and the particle CV is below 3%.

Bin Ye; Jilang Miao; Jiaolong Li; Zichen Zhao; Zhenqi Chang; Christophe A. Serra

2012-12-15T23:59:59.000Z

322

CO chemisorption effect on cerium initial and final states in the core level photoelectron spectrum of CeIr  

SciTech Connect (OSTI)

Carbon monoxide (CO) adsorption on the mixed-valence compound CeIr/sub 2/ has been studied by X-ray photoelectron spectroscopy. CO adsorption on this surface is predominantly molecular. They show that changes in the cerium 3d spectrum upon CO chemisorption may be separated into initial- and final-state effects. In the initial state, stabilization of the (Xe)(5d6s)/sup 3/4f/sup 1/ configuration occurs due to an increase in effective nuclear charge on the cerium atom. This leads to a decrease in f/sup 0/ intensity in the recorded spectrum. Increased f-electron repulsion in the final state raises the energy of the f/sup 2/ final-state configuration and causes a 2.2-eV shift to higher binding energy of the 3d/sub 5/2/f/sup 2/ peak. The 0.5-eV binding energy shifts of the 3d/sub 5/2/f/sup 1/ and 3d/sub 3/2/f/sup 1/ peaks along with the 2.2-eV shift of the 3d/sub 5/2/f/sup 2/ peak indicate that the f orbitals are quite sensitive indicators of the surface oxidation state in this compound.

Lindquist, J.M.; Hemminger, J.C.

1987-10-22T23:59:59.000Z

323

Contact Undergraduate Admissions Office | Tel +44 (0)117 928 8154 Email socsci-ug-admissions@bristol.ac.uk 54 ACCOUnTing And FinAnCE  

E-Print Network [OSTI]

-ug-admissions@bristol.ac.uk 54 ACCOUnTing And FinAnCE FACULTY oF soCiAL sCienCes And LAw bristol.ac.uk Accounting and Finance As one of the UK's leading departments for Accounting and Finance, we offer you the opportunity to study and their application skills. bristol.ac.uk/accounting Why study Accounting and Finance at Bristol? Bristol has

Subramanian, Sriram

324

In : John Tolan (d.), L'change, Paris, L'harmattan, 2009, pp. 201-214 Qu'est-ce qu'un change marchand ? Proposition de trois  

E-Print Network [OSTI]

marchand ? Proposition de trois définitions cumulatives pour l'analyse Ronan Le Velly Qu'est-ce qu'un échange marchand ? Cette question en apparence anodine a suggéré des réponses très différentes en sciences participent ou se tiennent à l'écart du système marchand (partie 3). 1. Le marché comme catégorie de

Paris-Sud XI, Université de

325

TUDE DES ISOTONES N = 81 : 139Ce, 141Nd, 143Sm, AU MOYEN DES RACTIONS (d, t ) ET (3He, 03B1)  

E-Print Network [OSTI]

'energie et la fragmentation de ces 6tats en fonction du nombre de protons. Le pick-up d'un neutron sur les' plus de 3 MeV d'nergie d'excitation, essentiellement au moyen d'un spectromtre magntique splitpole MeV excitation energy, of the N = 81 isotones : 139Ce, 141Nd, 143 Sm, have been studied at the Orsay

Boyer, Edmond

326

High Activity of Ce1-xNixO2-y for H2 Production through Ethanol Steam Reforming: Tuning Catalytic Performance through Metal-Oxide Interactions  

SciTech Connect (OSTI)

The importance of the oxide: Ce{sub 0.8}Ni{sub 0.2}O{sub 2-y} is an excellent catalyst for ethanol steam reforming. Metal-oxide interactions perturb the electronic properties of the small particles of metallic nickel present in the catalyst under the reaction conditions and thus suppress any methanation activity. The nickel embedded in ceria induces the formation of O vacancies, which facilitate cleavage of the OH bonds in ethanol and water.

G Zhou; L Barrio; S Agnoli; S Senanayake; J Evans; A Kubacka; M Estrella; J Hanson; A Martinez-Arias; et al.

2011-12-31T23:59:59.000Z

327

Study of oxygen reduction mechanism on Ag modified1 Sm1.8Ce0.2CuO4 cathode for solid oxide fuel cell2  

E-Print Network [OSTI]

to oxygen dissociation and diffusion process.26 KEYWORDS: Solid oxide fuel cell; Silver infiltration-time of the cell/stack/module as well as to reduce the cost of the materials. So32 far, many studies have beenStudy of oxygen reduction mechanism on Ag modified1 Sm1.8Ce0.2CuO4 cathode for solid oxide fuel

Paris-Sud XI, Université de

328

Electronic structure analysis and properties of Sr{sub 2}CeO{sub 4} grown by solgel method  

SciTech Connect (OSTI)

Highlights: ? Sr{sub 2}CeO{sub 4} nanopowders were obtained by solgel method. ? SEM/EDX imaging and chemical analysis have been done. ? XPS electronic structure was examined and discussed. ? The terminal and equatorial Ce-O bonds contributions were determined in O2p states. ? The energy gap was estimated by valence band and electrical measurements. -- Abstract: Sr{sub 2}CeO{sub 4} is a very promising material due to its various industrial applications, e.g. for the construction of field emission displays and light emitting diodes. In this work, the phosphor was synthesized by the solgel method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), electron paramagnetic resonance (EPR) and X-ray photoelectron spectroscopy (XPS) methods. They proved to be very good structural properties of the material and identified negligible impurities from the technological process. The decomposition of the surface of the nanocrystals was found but this did not decrease the spectral features of the compound. The analysis of the XPS O2p lines revealed contributions of two kinds of bonds: terminal and equatorial ones, in the ratio of 2/4. They are separated by 1.2 eV what is in agreement with the observed absorption spectra. A presence of the decomposed layers may produce asymmetric widening of the emission spectra towards a lower energy.

Talik, E., E-mail: talik@us.edu.pl [Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice (Poland); Lipi?ska, L. [Institute of Electronic Materials Technology, ul. Wlczy?ska 133, 01-919 Warszawa (Poland)] [Institute of Electronic Materials Technology, ul. Wlczy?ska 133, 01-919 Warszawa (Poland); Skrzypek, D. [Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice (Poland)] [Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice (Poland); Skuta, A. [Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice (Poland) [Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice (Poland); Institute of Electronic Materials Technology, ul. Wlczy?ska 133, 01-919 Warszawa (Poland); Zajdel, P.; Guzik, A.; Duda, H. [Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice (Poland)] [Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice (Poland)

2012-11-15T23:59:59.000Z

329

Optical and magneto-optical properties of Co-doped CeO{sub 2??} films in the 0.5 to 4?eV range  

SciTech Connect (OSTI)

Magnetically doped Ce{sub 1?x}Co{sub x}O{sub 2??} (nominal x?=?0.05 and 0.10) films were systematically studied by spectroscopic ellipsometry and magneto-optical spectroscopy. The samples were prepared by pulsed laser deposition on MgO(100) substrates and grew as textured polycrystalline films with thickness between 200 and 750?nm. They exhibited room temperature ferromagnetism and an out-of-plane easy axis attributed to magnetoelastic effects from the in-plane compressive strain. The dispersion of dielectric function of Ce{sub 1?x}Co{sub x}O{sub 2??} films was parametrized by the sum of Tauc-Lorentz and damped Lorentz oscillators and adjusted numerically. Deduced optical band gaps were similar to those of pure CeO{sub 2}, but the Co doping increased the optical absorption. The magneto-optical spectroscopy was carried out in both Faraday and Kerr configurations in the photon energy range from 0.5 to 4?eV, showing a strong dependence of the magneto-optical effect on the Co content near the optical band edge.

Veis, M., E-mail: veis@karlov.mff.cuni.cz; Kucera, M.; Zahradnik, M.; Antos, R. [Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 5, 12116 Prague (Czech Republic); Mistrik, J. [Faculty of Chemical Technology, University of Pardubice, 53210 Pardubice (Czech Republic); Bi, Lei; Kim, Hyun-Suk; Dionne, G. F.; Ross, C. A. [Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

2014-05-07T23:59:59.000Z

330

Si le vide absolu existe droite du piston A et qu'on l'abandonne lui-mme, ce piston prend une vitesse qui crot avec le temps et  

E-Print Network [OSTI]

83 Si le vide absolu existe à droite du piston A et qu'on l'abandonne à lui-même, ce piston prend, on imprime au piston A une vitesse progressivement croissante et dirigée de manière à dilater le gaz. Quel que soit le mouvement imprimé à ce piston, pourvu que sa vitesse varie d'une manière continue, le vide

Boyer, Edmond

331

In Situ Studies of the Active Sites for the Water Gas Shift Reaction over Cu-CeO2 Catalysts: Complex Interaction Between Metallic Copper and Oxygen Vacancies of Ceria  

SciTech Connect (OSTI)

New information about the active sites for the water gas shift (WGS) reaction over Cu-CeO{sub 2} systems was obtained using in-situ, time-resolved X-ray diffraction (TR-XRD), X-ray absorption spectroscopy (TR-XAS, Cu K and Ce L3 edges), and infrared spectroscopy (DRIFTS). Cu-CeO{sub 2} nanoparticles prepared by a novel reversed microemulsion method (doped Ce1-xCuxO2 sample) and an impregnation method (impregnated CuO{sub x}/CeO{sub 2} sample) were studied. The results from all of the samples indicate that both metallic copper and oxygen vacancies in ceria were involved in the generation of active sites for the WGS reaction. Evidence was found for a synergistic Cu-O vacancy interaction. This interaction enhances the chemical activity of Cu, and the presence of Cu facilitates the formation of O vacancies in ceria under reaction conditions. Water dissociation occurred on the O vacancy sites or the Cu-O vacancy interface. No significant amounts of formate were formed on the catalysts during the WGS reaction. The presence of strongly bound carbonates is an important factor for the deactivation of the catalysts at high temperatures. This work identifies for the first time the active sites for the WGS reaction on Cu-CeO{sub 2} catalysts and illustrates the importance of in situ structural studies for heterogeneous catalytic reactions.

Wang,X.; Rodriguez, J.; Hanson, J.; Gamarra, D.; Martinez-Arias, A.; Fernandez-Garcia, M.

2006-01-01T23:59:59.000Z

332

The Reaction of bis(1,2,4-tri-t-butylcyclopentadienyl)ceriumbenzyl, Cp'2CeCH2Ph with Methylhalides: a Metathesis Reaction that does not proceed by a Metathesis Transition State  

SciTech Connect (OSTI)

The experimental reaction between [1,2,4-(Me3C)3C5H2]2CeCH2Ph and CH3X, X = F, Cl, Br, and I, yields the metathetical exchange products, [1,2,4-(Me3C)3C5H2]2CeX and CH3CH2Ph. The reaction is complicated by the equilibrium between the benzyl derivative and the metallacycle [[1,2,4-(Me3C)3C5H2] [(Me3C)2C5H2C(CH3)2CH2]Ce, plus toluene since the metallacycle reacts with CH3X. Labelling studies show that the methyl group of the methylhalide is transferred intact to the benzyl group. The mechanism, as revealed by DFT calculations on (C5H5)2CeCH2Ph and CH3F, does not proceed by way of a four-center mechanism, (sigma-bond metathesis) but a lower barrier process involves a haptotropic shift of the Cp2Ce fragment so that at the transition state the para-carbon of the benzene ring is attached to the Cp2Ce fragment while the CH2 fragment of the benzyl group attacks CH3F that is activated by coordination to the metal ion. As a result the mechanism is classified as an associative interchange process.

Werkema, Evan; Andersen, Richard; Maron, Laurent; Eisenstein, Odile

2009-09-02T23:59:59.000Z

333

Spectroscopic study of a Cu/CeO{sub 2} catalyst subjected to redox treatments in carbon monoxide and oxygen  

SciTech Connect (OSTI)

Redox processes induced by interaction of a calcined Cu/CeO{sub 2} catalyst with CO and reoxidation with O{sub 2} have been investigated by CO-TPR, EPR, FTIR of adsorbed CO, and XPS. The initial calcined samples shows the presence of dispersed Cu{sup 2+} species, which give rise in the EPR spectrum to signals due to isolated entities, a somewhat more aggregated Cu{sup 2+}-containing phase, and copper ionic pairs, in coexistence with an EPR-silent CuO-type phase, revealed by XPS. A significant reduction of copper is produced already by contact with CO at room temperature, EPR results suggesting that reducibility of Cu{sup 2+} species decreases with their aggregation degree. Simultaneously, the ceria surface is also reduced by this interaction, copper acting as a strong promoter of this process. A singular consequence of the synergistic reduction of both components is observed by subjecting the catalyst to CO at T{sub r} {ge} 473 K, at which the CO adsorption capability of copper is apparently suppressed, in view of the absence of copper carbonyls in the FTIR spectrum. This is attributed to the establishment of electronic interactions between reduced ceria and small metallic copper particles generated by the reduction process. Contact of the CO-reduced sample with O{sub 2} at room or higher temperature produces an important reoxidation of both copper and ceria, revealed by FTIR and EPR. The synergetic effects between copper and ceria in the reduction process and the easy reoxidation of deeply reduced ceria are thought to be crucial to explaining the high catalytic activity shown by this system for CO oxidation.

Martinez-Arias, A.; Fernandez-Garcia, M.; Soria, J.; Conesa, J.C. [CSIC, Madrid (Spain). Instituto de Catalisis y Petroleoquimica] [CSIC, Madrid (Spain). Instituto de Catalisis y Petroleoquimica

1999-03-10T23:59:59.000Z

334

Bryant fall 2010 FCP H I L A N T H R O P Y I N A C T I O N FA L L/WI NTER2011ABRyA NTUN IvE RsITyREsoURcEFo RP Ro FEssIoNALsUccEss  

E-Print Network [OSTI]

Bryant fall 2010 FCP H I L A N T H R O P Y I N A C T I O N FA L L/WI NTER2011ABRyA NTUN IvE RsITyREsoURcEFo RP Ro FEssIoNALsUccEss #12;1 President's Message 2 VisiOn 2020 Bryant charts a bold course's success. 12 inVesting in tHe neXt generatiOn Helping deserving students make their hopes come true, Bryant

Blais, Brian

335

In partners EXTENSION CE  

E-Print Network [OSTI]

service Minnesota Local egetables i directors i a n in #12;LOCAL FOOD MARKET IN HEALTHCARE FRUITS AND VEGETABLES IN HEALTHCARE INSTITUTIONS BASED ON A SURVEY OF FOOD SERVICE DIRECTORS IN BECKER of Minnesota Extension conducted a survey of food service directors in Becker, Clay, Otter Tail, and Wilkin

Ciocan-Fontanine, Ionut

336

Neutron diffraction study of magnetic field induced behavior in the heavy Fermion Ce3Co4Sn13  

SciTech Connect (OSTI)

The specific heat of Ce3Co4Sn13 exhibits a crossover from heavy Fermion behavior with antiferromagnetic correlations at low field to single impurity Kondo behavior above 2 T. We have performed neutron diffraction measurements in magnetic fields up to 6 Tesla on single crystal samples. The (001) position shows a dramatic increase in intensity in field which appears to arise from static polarization of the 4f level and which at 0.14 K also exhibits an anomaly near 2T reflecting the crossover to single impurity behavior.

Christianson, Andrew D [ORNL; Goremychkin, E. A. [ISIS Facility, Rutherford Appleton Laboratory; Gardner, J. S. [Indiana University; Kang, H. J. [National Institute of Standards and Technology (NIST); Chung, J.-H. [National Institute of Standards and Technology (NIST); Manuel, P. [ISIS Facility, Rutherford Appleton Laboratory; Thompson, J. D. [Los Alamos National Laboratory (LANL); Sarrao, J. L. [Los Alamos National Laboratory (LANL); Lawrence, J. M. [University of California, Irvine

2008-01-01T23:59:59.000Z

337

Synthesis and crystal structure of the isotypic rare earth thioborates Ce[BS{sub 3}], Pr[BS{sub 3}], and Nd[BS{sub 3}  

SciTech Connect (OSTI)

The orthothioborates Ce[BS{sub 3}], Pr[BS{sub 3}] and Nd[BS{sub 3}] were prepared from mixtures of the rare earth (RE) metals together with amorphous boron and sulfur summing up to the compositions CeB{sub 3}S{sub 6}, PrB{sub 5}S{sub 9} and NdB{sub 3}S{sub 6}. The following preparation routes were used: solid state reactions with maximum temperatures of 1323 K and high-pressure high-temperature syntheses at 1173 K and 3 GPa. Pr[BS{sub 3}] and Nd[BS{sub 3}] were also obtained from rare earth chlorides RECl{sub 3} and sodium thioborate Na{sub 2}B{sub 2}S{sub 5} by metathesis type reactions at maximum temperatures of 1073 K. The crystal structure of the title compounds was determined from X-ray powder diffraction data. The thioborates are isotypic and crystallize in the orthorhombic spacegroup Pna2{sub 1} (No. 33; Z=4; Ce: a=7.60738(6)A, b=6.01720(4)A, c=8.93016(6)A; Pr: a=7.56223(4)A, b=6.00876(2)A, c=8.89747(4)A; Nd: a=7.49180(3)A, b=6.00823(2)A, c=8.86197(3)A) . The crystal structures contain isolated [BS{sub 3}]{sup 3-} groups with boron in trigonal-planar coordination. The sulfur atoms form the vertices of undulated kagome nets, which are stacked along [100] according to the sequence ABAB. Within these nets every second triangle is occupied by boron and the large hexagons are centered by rare earth ions, which are surrounded by overall nine sulfur species. - Abstract: Graphical Abstract Legend (TOC Figure): Table of Contents Figure The isotypic orthothioborates Ce[BS{sub 3}], Pr[BS{sub 3}] and Nd[BS{sub 3}] were prepared using different preparation routes. The crystal structure of the title compounds was determined from X-ray powder diffraction data. The crystal structures contain isolated [BS{sub 3}]{sup 3-} groups with boron in trigonal-planar coordination. The sulfur atoms form the vertices of corrugated kagome nets (sketched with blue dotted lines), which are stacked along [100] according to the sequence ABAB. Within these nets every second triangle is occupied by boron and the large hexagons are centered by rare earth ions, which are surrounded by overall nine sulfur species.

Hunger, Jens; Borna, Marija [Max Planck Institute for Chemical Physics of Solids, Noethnitzer Strasse 40, D-01187 Dresden (Germany); Kniep, Ruediger, E-mail: kniep@cpfs.mpg.d [Max Planck Institute for Chemical Physics of Solids, Noethnitzer Strasse 40, D-01187 Dresden (Germany)

2010-03-15T23:59:59.000Z

338

PoPulation Differentiation anD raPiD evolution of egg Color in aCCorDanCe with Solar raDiation  

E-Print Network [OSTI]

PoPulation Differentiation anD raPiD evolution of egg Color in aCCorDanCe with Solar raDiation Davi, . Diferenciación entre Poblaciones y Evolución Rápida del Color de los Huevos de Acuerdo a la Radiación Solar Uy C P' R d Pm wb, ://www.j. m/I.. DOI: 10.1525/k.2008.07033DOI: 10.1525/k.2008.07033 Bird egg color

Lahti, David C.

339

Data:Ead2cbdb-2126-45fe-a85d-ac94ce28685d | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Pagec-01b596aa1744b55997c1cc No revision hasa3e396ee3eb No revisionEad2cbdb-2126-45fe-a85d-ac94ce28685d No revision has been

340

Data:F16c5f0d-5a60-4a04-b4ca-ce081aef8318 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision has been approved for this page. It is currently under65-8d3d-7a38fe093277 Noa04-b4ca-ce081aef8318 No

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


341

Data:F358e502-527d-49b0-b8e7-16ce8282b8fb | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision has been approved for this page. It ise7c5ddfdbf9 Noabed3a4e456e No revision7b9013bd6b4 Noe7-16ce8282b8fb

342

Data:F3d511d9-6321-49ce-b5b2-a0d21fd28d52 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision has been approved for this page. It ise7c5ddfdbf9d9-6321-49ce-b5b2-a0d21fd28d52 No revision has been

343

Data:F3d6ebd1-4692-4df7-a759-b351887b4ce5 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision has been approved for this page. It ise7c5ddfdbf9d9-6321-49ce-b5b2-a0d21fd28d52 No revision has

344

Data:F4507f90-f464-4300-a461-779ce3ede427 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision has been approved for this page. It6d-bcfb5222116e No revision has beenb-57d295089f06 No79ce3ede427 No

345

Data:69ab8f95-6863-4cae-a55b-f1fe86ce5f9a | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revision has been approvedea02758d3 Nob05268d8cd No revisionf1fe86ce5f9a No revision has been

346

Data:69ad4a5c-e399-4bbc-a29e-893db496f7e3 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revision has been approvedea02758d3 Nob05268d8cd No revisionf1fe86ce5f9a No revision has

347

Data:69ce0918-7649-4eb8-8d7e-1b5eba546306 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revision has been approvedea02758d3 Nob05268d8cd No revisionf1fe86ce5f9ae-1b5eba546306 No revision

348

Data:6bf6820c-4018-49a6-9d24-d4ce025baf7c | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revision has been approvedea02758d3f49fa2694 No revision hasd4ce025baf7c No revision has been

349

Data:77ae1593-d949-46be-94b3-089dd26da1ce | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revision has6a0216321b No revision8390-f3c1d17c852d Nof0ac113123b15ccc3573012fcf8e No9dd26da1ce No

350

Data:1c0f495d-a569-458c-ae34-04e1ce904207 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3 No revision5af6d400c2d No revision has been approved for this-84c4-7062f9d38906e1ce904207 No

351

Data:1e01002e-7a5f-4601-bc3b-80ce915ef62f | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3 No revision5af6d400c2d No revisionb-80ce915ef62f No revision has been approved for this page. It

352

Data:1e47f23d-70cb-484e-8f03-5560f79e7ce7 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3 No revision5af6d400c2d No revisionb-80ce915ef62f No revision hasac2dead

353

Data:1eb97ce4-35bb-42e2-8844-13792c86e87e | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3 No revision5af6d400c2d No revisionb-80ce915ef62f Noc7ab0bc244 No revision has been

354

Data:269ec8c1-6200-4470-9c63-26025ca55ce1 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3 Noc7e1a8ffe No revision has been approved fordec-411fce1605ac No revision has beenca55ce1 No

355

Data:27c1481d-1a5c-47d4-9aa1-cbd8c47ad3ce | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3 Noc7e1a8ffe No revision has been approved7af2e2cf No revisioncbd8c47ad3ce No revision has been

356

Data:B41e26ea-0c6a-4633-a2df-c6ce1347b88c | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2 No revision has38865d08 No revision has been28a07c581c-e2db449df0ab No revision

357

Data:B487ce88-ef94-4b2a-a8c7-ed4713604b27 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2 No revision has38865d08 No revision has been28a07c581c-e2db449df0abf-d490fdecf74e Nob8bbff9ee713604b27

358

Data:B488e731-ce12-4875-979a-6795c7bdc1e6 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2 No revision has38865d08 No revision has been28a07c581c-e2db449df0abf-d490fdecf74e5c7bdc1e6 No revision

359

Data:B48bf307-f1fc-4c36-96dc-ce6fe7fcf1f9 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2 No revision has38865d08 No revision has been28a07c581c-e2db449df0abf-d490fdecf74e5c7bdc1e6 No

360

Data:B59c62d7-21b5-43df-94fb-cf27b924d0ce | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2 No revision has38865d08 No revisionb6dbbdc091c No revision has been approvedbe6be56861fb-cf27b924d0ce No

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


361

Data:B654abc4-3da6-4aac-ac62-0ce12cd06e3e | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2 No revision has38865d08 No revisionb6dbbdc091c No revision57b27257aa84abc4-3da6-4aac-ac62-0ce12cd06e3e

362

Data:C0a52638-ea2c-4f08-a1f2-e5332ce0e99a | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742 No revision has been approvedcf16e2831 No revisionef4e28824d9e45d1632a Noe5332ce0e99a

363

Data:C2f18274-b69f-4b3f-aee5-5cd471ff1ce6 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742 No revision has beena032db6d83 Noc-56029b877fee No-2ac0c7dfae14 Nof-aee5-5cd471ff1ce6

364

Data:57495fbc-0148-4f9a-b380-8964ce35f8c4 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3a87dcc95b3da-78f7ef0b79f6 No revisionc8de9b501c3dd65b9388caee0960404ce35f8c4 No revision has been

365

Data:62b9252f-0acb-4f42-9153-056c19f3ce28 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revision has been approved fore6e8eee44 No revision has been approved for this page.-056c19f3ce28 No

366

Data:6311534c-5c06-43a9-b52b-3345ce0c2594 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revision has been approved fore6e8eee44 No revision has been8efe6555aea3 Nodb868e8293b95ce0c2594 No

367

Data:43b75c3d-8442-4863-862c-c540ce2bff2e | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3a87dcc95b No revision hasaab84-009f-4fb1-b666-ed5d43c9089f No revision7447c826c540ce2bff2e No

368

Data:4c45a67b-3233-4864-a992-e1ddc0e804ce | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3a87dcc95b Nobfef8fa58cf7 No revision has been approved for7276d No revision hasccd715e973e804ce No

369

Data:4ef52611-1237-48ff-b5e4-5a331d645ce5 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3a87dcc95b Nobfef8fa58cf7 No revisionf377c06978a3bcce-0d410894aead2-1b6c68d2566b Noa331d645ce5 No

370

Data:50bf8666-897e-420e-9296-bc0fb74c7ce2 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3a87dcc95b Nobfef8fa58cf74865627f783 No revision has been approvedfb74c7ce2 No revision has been

371

Data:1b77e18e-6786-46e6-b1f8-a0f330d9b3ce | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3 No revision hasfcd92f-8652-45c0-96f0-a73be7466ef5efeb2958a4e35576efcf No-62964f9fb11ef330d9b3ce

372

Data:A7b83178-4652-4359-84d3-8fd23f276ce6 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 Nod2db5b31cb44f-4cd6-87d8-e9253aab8d9c No revision hasf32924 Noda8782 Nof4a29ea02bd9afb393f276ce6 No

373

Data:Aa08fc77-4215-4406-97c5-475ce916ca14 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 Nod2db5b31cb44f-4cd6-87d8-e9253aab8d9c No0a794995 Noaf5f-795951ea1924 No revision has been75ce916ca14

374

Data:Fbc7a7bd-03ca-42ce-a9de-795a5d445ab2 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision has been approved for thisd785796ade4709e636e4428 NoFbc7a7bd-03ca-42ce-a9de-795a5d445ab2 No revision has

375

Data:Fcb9c794-d943-431f-9cb9-2d3ce1ec9f0b | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision has been approved forcd976b98236 No revision has been approvedFcb9c794-d943-431f-9cb9-2d3ce1ec9f0b No

376

Data:8b5390fb-ee39-4af4-91d3-44504cac78ce | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revisione0a2d50bdf No18fed1db5 No revision hascef78-6440-4257-8584-e4134c8774d8 No revisioncac78ce

377

Data:8c852f57-99ea-4fc7-957e-2695ce0b21ad | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revisione0a2d50bdf No18fed1db5 No30e696c No revision has beena6e7db5d8e7423c384151e-2695ce0b21ad No

378

Data:9018f71d-e30a-40f8-a7d4-85d3ce0cd33a | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revisione0a2d50bdf No18fed1db58-e7b51f6388655-83a5-eb235f1bc98b No revisiond3ce0cd33a No revision

379

Data:995303c1-2d9c-49dc-a96a-d571ce8fb967 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revisione0a2d50bdf35248292f1de-f2ac9a2bd9c05-8a3226ea1649af-19c5bd7c73d5 No revision71ce8fb967 No

380

Data:9aa8976e-2e8b-4ce2-80c6-6e6ef2218a7e | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 Nod2db5b31cb44 No revision has been approved for this page.76f5afd9 Nob-4ce2-80c6-6e6ef2218a7e No

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


381

Data:9d1ccf31-0274-4c1e-93c7-4121ce28476f | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 Nod2db5b31cb44 No revision has been approved095c1f504bccf31-0274-4c1e-93c7-4121ce28476f No revision has

382

Data:Ce1740e2-34b1-4f5a-a28a-025061307347 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision has been approved for this page.

383

Data:Ce18419d-c9a8-4262-9b0f-b19dfd989e19 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision has been approved for this

384

Data:Ce1e05d4-c268-4fb1-9ae8-a28f19331d5e | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision has been approved for

385

Data:Ce1f8b49-9c33-442f-85b3-202cdfe22397 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision has been approved forcdfe22397 No

386

Data:Ce2cb140-d2c5-46c7-9db6-45793f020444 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision has been approved3f020444 No revision

387

Data:Ce2d8931-65c2-402a-ad6f-e2457290a745 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision has been approved3f020444 No

388

Data:Ce354898-56c6-4a00-8061-8d98a7725e13 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision has been approved3f020444

389

Data:Ce35d66b-0bac-49ed-b1a4-4798604ee20b | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision has been approved3f0204444798604ee20b

390

Data:Ce364f9c-12fa-492d-8709-b7a844aa445d | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision has been

391

Data:Ce3caf43-0af8-40dc-a74f-268e35e875c4 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision has

392

Data:Ce4b5c29-1251-4f41-9558-57dedca7e7a8 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision hasf-0a6eefe99579 No revision

393

Data:Ce5ebca7-3ca1-4054-8d48-44b83b683152 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision hasf-0a6eefe99579 No

394

Data:Ce672009-05f2-4dcb-aa67-266845299fb9 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision hasf-0a6eefe99579 No6845299fb9 No

395

Data:Ce6d9c9d-cbec-4478-b62e-baa6c4a20c68 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision hasf-0a6eefe99579 No6845299fb9

396

Data:Ce702f80-5328-4a23-9bf2-686a2ede941c | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision hasf-0a6eefe99579

397

Data:Ce729a3d-8cf3-42be-aa55-f56af77095b4 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision

398

Data:Ce913245-9b0f-4f93-b902-d4d81c885fc8 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revisionde0244033 No

399

Data:Ce9437ae-b97d-4b72-b4c2-692d70f3f498 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revisionde0244033 Nodaf70201be No revision

400

Data:Ce978432-c400-4b9a-aac3-f064e907ab91 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revisionde0244033 Nodaf70201be No

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


401

Data:Cf87540f-a091-4b3d-a854-3a4580ce377a | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Pagec-01b596aa1744 No revision has been approved for this page. It is currently under review by381a4316dbd0ce377a No revision

402

Data:D14bdc50-afc2-48b7-8683-46ce3a082b48 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Pagec-01b596aa1744 No revision has been approved for this1e-67de4b817342 Noafc2-48b7-8683-46ce3a082b48 No revision has been

403

Data:D178a8b1-1230-486b-81d7-7735ce2de0c0 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Pagec-01b596aa1744 No revision has been approved for this1e-67de4b817342 Noafc2-48b7-8683-46ce3a082b48 No5a67fb731350

404

Data:D34e5741-8f14-44fb-bc01-7ce68420818b | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Pagec-01b596aa1744 No revision has been approved97069579d6 No revision has beenaa32-cb915d7718b4ce68420818b No revision has

405

Data:D3f76dca-51f9-449b-9b47-0ce4d4e66ced | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Pagec-01b596aa1744 No revision has been approved97069579d6 No revision has993fca7f31 No256710c5a No revisionb47-0ce4d4e66ced No

406

Data:Dd576956-48ce-4d67-8b2b-1294f1a3e40c | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Pagec-01b596aa1744 NoDce066cd-9c07-4949-aa43-5e5007829464 No revision has been approvedf2dd7ce5 No revision has been

407

Data:E0958330-605c-4993-b261-c48f1ce25a83 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Pagec-01b596aa1744b55997c1cc No revision has been approved for this page.db4f66f44 No revisioncfdf7c886863 Nof1ce25a83 No

408

Data:7cf1840e-73e6-44b8-b3bd-623df9f7ce8b | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revision has6a0216321b Nof667a9d7d88cc1e8c1443c No revision has-f30bc4c366f2430ba57f4623df9f7ce8b No

409

Data:7e96594c-0115-4b9a-9454-a14643ce96d7 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revision has6a0216321bfd-b46c-2ea652fe29af No revisionbee-4f29-bfcd-61cf3e1ae19b No3ce96d7 No

410

Data:85e2c636-297d-46ce-9fb7-1a5de50c8063 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revisione0a2d50bdf No revisionb27d098e Nod173ef850e7b No revision hasd-46ce-9fb7-1a5de50c8063 No

411

Data:88d7a5db-f39e-44f3-831f-f285ce00ea49 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revisione0a2d50bdf No revisionb27d098eef61148ac7 Nof90d746d2387 Noecc9378167f3f-f285ce00ea49 No

412

Data:340d2eb2-97d1-4e4e-9adc-44059736ce1f | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3 Noc7e1a8ffe No869d7ced0c4aa77f45ad4a No4059736ce1f No revision has been approved for this page.

413

Data:3436f74d-5d3e-462b-b13d-1e7bf005ce3b | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3 Noc7e1a8ffe No869d7ced0c4aa77f45ad4a No4059736ce1f No revision has been588fd315

414

Data:347af265-5ce5-4063-bdcc-9c2c7407ee9a | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3 Noc7e1a8ffe No869d7ced0c4aa77f45ad4a No4059736ce1f No revision862b6a0e9f3 No

415

Data:403f356d-b7ec-498f-9cbb-c0d57f83c4ce | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3a87dcc95b No revision has beend26-1acc36863a1d No8-b13b41761ee4 No revisioncebe577bea Nof83c4ce No

416

A novel yellow-emitting SrAlSi{sub 4}N{sub 7}:Ce{sup 3+} phosphor for solid state lighting: Synthesis, electronic structure and photoluminescence properties  

SciTech Connect (OSTI)

Ce{sup 3+}-doped and Ce{sup 3+}/Li{sup +}-codoped SrAlSi{sub 4}N{sub 7} phosphors were synthesized by gas pressure sintering of powder mixtures of Sr{sub 3}N{sub 2}, AlN, ?-Si{sub 3}N{sub 4}, CeN and Li{sub 3}N. The phase purity, electronic crystal structure, photoluminescence properties of SrAlSi{sub 4}N{sub 7}:Ce{sup 3+}(Ce{sup 3+}/Li{sup +}) were investigated in this work. The band structure calculated by the DMol{sup 3} code shows that SrAlSi{sub 4}N{sub 7} has a direct band gap of 3.87 eV. The single crystal analysis of Ce{sup 3+}-doped SrAlSi{sub 4}N{sub 7} indicates a disordered Si/Al distribution and nitrogen vacnacy defects. SrAlSi{sub 4}N{sub 7} was identified as a major phase of the fired powders, and Sr{sub 5}Al{sub 5}Si{sub 21}N{sub 35}O{sub 2} and AlN as minor phases. Both Ce{sup 3+} and Ce{sup 3+}/Li{sup +} doped SrAlSi{sub 4}N{sub 7} phosphors can be efficiently excited by near-UV or blue light and show a broadband yellow emission peaking around 565 nm. A highest external quantum efficiency of 38.3% under the 450 nm excitation was observed for the Ce{sup 3+}/Li{sup +}-doped SrAlSi{sub 4}N{sub 7} (5 mol%). A white light LED lamp with color temperature of 6300 K and color rendering index of Ra=78 was achieved by combining Sr{sub 0.97}Al{sub 1.03}Si{sub 3.997}N/94/maccounttest14=t0005{sub 1}8193 {sub 7}:Ce{sup 3+}{sub 0.03} with a commercial blue InGaN chip. It indicates that SrAlSi{sub 4}N{sub 7}:Ce{sup 3+} is a promising yellow emitting down-conversion phosphor for white LEDs. - Graphical abstract: One-phosphor converted white light-emitting diode (LED) was fabricated by combining a blue LED chip and a yellow-emitting SrAlSi4N7:Ce{sup 3+} phosphor (see inset), which has the color rendering index of 78 and color temperature of 6300 K. - Highlights: We reported a new yellow nitride phosphor suitable for solid state lighting. We solved the crystal structure and evidenced a disordered Si/Al distribution. We fabricated a high color rendering white LEDs by using a single SrAlSi4N7:Ce.

Ruan, Jian [Sialon Group, Sialon Unit, Environment and Energy Materials Division, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Laboratory of Glasses and Nanostructured Functional Materials, 122 Luoshi Road, Wuhan, Hubei 430070 (China); Xie, Rong-Jun, E-mail: Xie.Rong-Jun@nims.go.jp [Sialon Group, Sialon Unit, Environment and Energy Materials Division, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Funahashi, Shiro [Sialon Group, Sialon Unit, Environment and Energy Materials Division, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Tanaka, Yoshinori [Green Computational Materials Science Group, Global Research Center for Environment and Energy based on Nanomaterials Science (Green), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0044 (Japan); Takeda, Takashi; Suehiro, Takayuki; Hirosaki, Naoto [Sialon Group, Sialon Unit, Environment and Energy Materials Division, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Li, Yuan-Qiang [Dow Electronic Materials, 201 Washington Road, Princeton, NJ 08540 (United States)

2013-12-15T23:59:59.000Z

417

Insensitivity of the pressure dependences of characteristic energy scales in Ce1xRxCoIn? (R=Yb,Y,Gd) to the electronic configuration of the rare-earth ion  

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

Cooperative Ce and Yb valence fluctuations have recently been proposed as the mechanism responsible for stabilizing correlated electron phenomena in Ce??xYbxCoIn? over an unexpectedly large range of concentrations. In order to better understand the origins and character of this stability, we have measured the effect of applied pressure on relevant energy scales such as the superconducting critical (Tc) and Kondo-lattice coherence (T*) temperatures of Ce??xRxCoIn? with R=Yb, Y, and Gd. Electrical resistivity measurements were performed under applied pressure on samples doped with intermediate-valent Yb and stable-valent Gd and Y, and the responses of Tc and T* to increased pressure in these systems are compared. The character of Tc(P) and T*(P) in Ce??xRxCoIn? depends only on their respective ambient-pressure values Tc(0) and T*(0), independent of the electronic configuration of R or concentration x. The consequences of this result are discussed within the context of possible cooperative valence fluctuations in Ce??xYbxCoIn?.

White, B. D.; Hamlin, J. J.; Huang, K.; Shu, L.; Lum, I. K.; Baumbach, R. E.; Janoschek, M.; Maple, M. B.

2012-09-01T23:59:59.000Z

418

CO chemisorption effects on cerium initial and final states in the core-level photoelectron spectrum of CeIr/sub 2/  

SciTech Connect (OSTI)

Carbon monoxide (CO) adsorption on the mixed-valence compound CeIr/sub 2/ has been studied by X-ray photoelectron spectroscopy. CO adsorption on this surface is predominantly molecular. We show that changes in the cerium 3d spectrum upon CO chemisorption may be separated into initial- and final-state effects. In the initial state, stabilization of the (Ce)(5d6s)34f1 configuration occurs due to an increase in effective nuclear charge on the cerium atom. This leads to a decrease in f0 intensity in the recorded spectrum. Increased f-electron repulsion in the final state raises the energy of the f2 final-state configuration and causes a 2.2-eV shift to higher binding energy of the 3d5/2f2 peak. The 0.5-eV binding energy shifts of the 3d5/2f1 and 3d3/2f1 peaks along with the 2.2-eV shift of the 3d5/2f2 peak indicate that the f orbitals are quite-sensitive indicators of the surface oxidation state in this compound.

Lindquist, J.M.; Hemminger, J.C.

1987-01-01T23:59:59.000Z

419

Synthesis of solid solution Er{sub 2-x}Ce{sub x}W{sub 3}O{sub 12} and studies of their thermal expansion behavior.  

SciTech Connect (OSTI)

The syntheses and structures of Er{sub 2-x}Ce{sub x}W{sub 3}O{sub 12} were studied. It was found that pure phases could form only for 0.0 {le} x {le} 0.4 and 1.5 {le} x {le} 2.0. Compounds with 0 {le} x {le} 0.4 have the hydrated orthorhombic structure at room temperature and transform to unhydrated orthorhombic one above 135 C whereas samples with 1.5 {le} x {le} 2.0 crystallize in monoclinic structure. Thermal expansion properties of Er{sub 2-x}Ce{sub x}W{sub 3}O{sub 12} were studied with high temperature X-ray powder diffraction. Samples with 0 {le} x {le} 0.4 exhibit negative thermal expansion in temperature range of 200-800 C and higher cerium content leads to more negative thermal expansion coefficient. However, compounds with 1.5 {le} x {le} 2.0 show positive thermal expansion owing to the edge-sharing polyhedra.

Wu, M. M.; Cheng, Y. Z.; Peng, J.; Xiao, X. L.; Chen, D. F.; Kiyanagi, R.; Fieramosca, J. S.; Short, S.; Jorgensen, J.; Hu, Z. B.; Graduate Univ. Chinese Academy of Sciences; China Inst. of Atomic Energy

2007-01-30T23:59:59.000Z

420

X-ray absorption studies of the local structure and f-level occupancy in CeIr(1-x)Rh(x)In(5)  

SciTech Connect (OSTI)

The CeIr{sub 1-x}Rh{sub x}In{sub 5} series exhibits a range of interesting phenomena, including heavy-fermion superconductivity, non-Fermi liquid behavior, and concomitant antiferromagnetism (AF) and superconductivity (SC). In the low-Rh concentration range (0.1 {ge} x {ge} 0.5), specific heat measurements show a broad anomaly, suggestive of gross phase separation. We have performed x-ray absorption experiments at the Ce L{sub III}, Ir L{sub III}, and Rh K-edges as a function of Rh concentration and temperature. X-ray absorption near-edge structure (XANES) measurements indicate that cerium is close to trivalent in this system, with no measurable change with temperature from 20-300 K, consistent with a heavy-fermion material. Extended x-ray absorption fine structure (EXAFS) measurements as a function of temperature from all measured edges indicate the local crystal structure of all samples is well ordered, with no gross phase separation observed, even for samples with x = 0.125 and x = 0.25. These results therefore suggest that the anomalous specific heat behavior in the 0.1 {ge} x {ge} 0.5 range have some other explanation, and some possibilities are discussed.

Daniel, M.; Han, S.-W.; Booth, C.H.; Cornelius, A.L.; Pagliuso, P.G.; Sarrao, J.L.; Thompson, J.D.

2004-04-15T23:59:59.000Z

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


421

Unraveling the Active Site in Copper-Ceria Systems for the Water-Gas Shift Reaction: In Situ Characterization of an Inverse Powder CeO2-x/CuO-Cu Catalyst  

SciTech Connect (OSTI)

An inverse powder system composed of CeO{sub 2} nanoparticles dispersed over a CuO-Cu matrix is proposed as a novel catalyst for the water-gas shift reaction. This inverse CeO{sub 2}/CuO-Cu catalyst exhibits a higher activity than standard Cu/CeO{sub 2} catalysts. In situ synchrotron characterization techniques were employed to follow the structural changes of CeO{sub 2}/CuO-Cu under reaction conditions. Time-resolved X-ray diffraction experiments showed the transformation of CuO to metallic Cu via a Cu{sub 2}O intermediate. Short-order structural changes were followed by pair distribution function analysis and corroborated the results obtained by diffraction. Moreover, X-ray absorption spectroscopy also revealed oxidation state changes from Cu{sup 2+} to Cu{sup 0} and the partial reduction of CeO{sub x} nanoparticles. The activity data obtained by mass spectrometry revealed that hydrogen production starts once the copper has been fully reduced. The strong interaction of ceria and copper boosted the catalytic performance of the sample. The inverse catalyst was active at low temperatures, stable to several reaction runs and to redox cycles. These characteristics are highly valuable for mobile fuel cell applications. The active phases of the inverse CeO{sub 2}/CuO-Cu catalyst are partially reduced ceria nanoparticles strongly interacting with metallic copper. The nature and structure of the ceria nanoparticles are of critical importance because they are involved in processes related to water dissociation over the catalyst surface.

Barrio, L.; Estrella, M; Zhou, G; Wen, W; Hanson, J; Hungria, A; Hornes, A; Fernandez-Garcia, M; Martinez-Arias, A; Rodriguez, J

2010-01-01T23:59:59.000Z

422

Unraveling the Active Site in Copper-ceria Systems for the Water Gas Shift Reaction: In-situ Characterization of an Inverse Powder CeO2-x/CuO-Cu Catalyst  

SciTech Connect (OSTI)

An inverse powder system composed of CeO{sub 2} nanoparticles dispersed over a CuO-Cu matrix is proposed as a novel catalyst for the water-gas shift reaction. This inverse CeO{sub 2}/CuO-Cu catalyst exhibits a higher activity than standard Cu/CeO{sub 2} catalysts. In situ synchrotron characterization techniques were employed to follow the structural changes of CeO{sub 2}/CuO-Cu under reaction conditions. Time-resolved X-ray diffraction experiments showed the transformation of CuO to metallic Cu via a Cu{sub 2}O intermediate. Short-order structural changes were followed by pair distribution function analysis and corroborated the results obtained by diffraction. Moreover, X-ray absorption spectroscopy also revealed oxidation state changes from Cu{sup 2+} to Cu{sup 0} and the partial reduction of CeOx nanoparticles. The activity data obtained by mass spectrometry revealed that hydrogen production starts once the copper has been fully reduced. The strong interaction of ceria and copper boosted the catalytic performance of the sample. The inverse catalyst was active at low temperatures, stable to several reaction runs and to redox cycles. These characteristics are highly valuable for mobile fuel cell applications. The active phases of the inverse CeO{sub 2}/CuO-Cu catalyst are partially reduced ceria nanoparticles strongly interacting with metallic copper. The nature and structure of the ceria nanoparticles are of critical importance because they are involved in processes related to water dissociation over the catalyst surface.

Rodriguez, J.A.; Barrio, L.; Estrella, M.; Zhou, G.; Wen, W.; Hanson, J.C.; Hungra, A.B.; Horns, A.; Fernndez-Garca, M.; Arturo Martnez-Arias, A.

2010-03-04T23:59:59.000Z

423

The chemical stability and conductivity of BaCe{sub 0.9-x}Y{sub x}Nb{sub 0.1}O{sub 3-{sigma}} proton-conductive electrolyte for SOFC  

SciTech Connect (OSTI)

BaCe{sub 0.8}Y{sub 0.2}O{sub 3-{delta}} and BaCe{sub 0.9-x}Y{sub x}Nb{sub 0.1}O{sub 3-{delta}} (x = 0.1, 0.15, 0.2, 0.25, 0.3, 0.35) were prepared by a solid-state reactions. It was found that the BaCe{sub 0.8}Y{sub 0.2}O{sub 3-{delta}} samples decomposed into CeO{sub 2} and BaCO{sub 3} after being exposed in the atmosphere (3% CO{sub 2} + 3% H{sub 2}O + 94% N{sub 2}) at 700 deg. C for 10 h. However, samples containing Nb remains unchanged in the same conditions, demonstrating a better stability in the presence of CO{sub 2} and H{sub 2}O. The conductivity of BaCe{sub 0.9-x}Y{sub x}Nb{sub 0.1}O{sub 3-{delta}} increased with the increase of Y content (x {<=} 0.30), and the highest value was observed at x = 0.30 where a significant decrease in conductivity took place at x = 0.35. The conductivity of BaCe{sub 0.6}Y{sub 0.3}Nb{sub 0.1}O{sub 3-{delta}} reaches 0.01 S/cm in humid hydrogen at 700 deg. C, slight lower than BaCe{sub 0.8}Y{sub 0.2}O{sub 3-{delta}}, 0.012 S/cm in the same conditions. Fuel cell with BaCe{sub 0.6}Y{sub 0.3}Nb{sub 0.1}O{sub 3-{delta}} as-prepared was successfully prepared and humidified hydrogen was supplied as fuels in evaluating the fuel cell performance. The open circuit voltage, peak power density and interfacial resistance at 700 deg. C were 1.02 V, 345 mW/cm{sup 2} and 0.27 {Omega} cm{sup 2}, respectively.

Xie Kui [Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (China); Yan Ruiqiang [Department of Materials Engineering, Taizhou University, Linhai, Zhejiang 317000 (China); Xu Xiaoxiang [School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST (United Kingdom); Liu Xingqin, E-mail: xqliu@ustc.edu.cn [Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (China); Meng Guangyao [Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (China)

2009-07-01T23:59:59.000Z

424

Quaternary Germanides Formed in Molten Aluminum: Tb2NiAl4Ge2 and Ce2NiAl6-xGe4-y (x 0.24, y 1.34)  

E-Print Network [OSTI]

Quaternary Germanides Formed in Molten Aluminum: Tb2NiAl4Ge2 and Ce2NiAl6-xGe4-y (x 0.24, y 1 gebildete quaternäre Germanide: Tb2NiAl4Ge2 und Ce2NiAl6-xGe4-y (x 0.24, y 1.34) Inhaltsübersicht. Die ebenfalls die Introduction The use of metal fluxes in exploratory synthesis presents significant synthetic

Trikalitis, Pantelis N.

425

Solid state reactions of nanocrystalline Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75} mixed oxide with high surface area silica in oxidizing and reducing atmosphere  

SciTech Connect (OSTI)

The interaction of nanocrystalline Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75} mixed oxide with a high surface amorphous silica support in an oxidizing and reducing atmosphere was studied by XRD, HRTEM, SAED, SEM and BET techniques. The Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75}-SiO{sub 2} system shows very high structural and size stability in the oxidizing atmosphere up to 1000 Degree-Sign C, but in hydrogen spreading of the oxide onto silica occurs at temperatures above 800 Degree-Sign C. In the oxidizing atmosphere stability of the mixed oxide is limited by extraction of ytterbium from the oxide driven by a tendency to form ytterbium silicates. A new polymorph of Yb silicate, isomorphic with y-Y{sub 2}Si{sub 2}O{sub 7} (yttrialite), has been identified in the samples containing the mixed Ce-Yb oxide. The absence of y-Yb{sub 2}Si{sub 2}O{sub 7} silicate in the Yb{sub 2}O{sub 3}-SiO{sub 2} samples treated in similar conditions indicates that Ce{sup 4+} ions are needed to stabilize the structure. - Graphical abstract: Structure evolution of nano-Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75}-SiO{sub 2} in air and in H{sub 2}. Highlights: Black-Right-Pointing-Pointer Nano-Ce{sub 0.50}Yb{sub 0.50}O{sub 1.75} on SiO{sub 2} is stable in air up to 1000 Degree-Sign C but spreads in hydrogen at 800 Degree-Sign C. Black-Right-Pointing-Pointer Formation of Yb silicates determines the stability of Ce{sub 0.50}Yb{sub 0.50}O{sub 1.75} at high temperatures. Black-Right-Pointing-Pointer New, y-Yb{sub 2}Si{sub 2}O{sub 7} silicate (yttrialite type) forms in Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75}-SiO{sub 2} in H{sub 2} at 1100 Degree-Sign C.

Malecka, Malgorzata A. [Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wroclaw 2 (Poland); Kepinski, Leszek, E-mail: L.Kepinski@int.pan.wroc.pl [Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wroclaw 2 (Poland)

2012-08-15T23:59:59.000Z

426

Role of metal components in Pd?Cu bimetallic catalysts supported on CeO2 for the oxygen-enhanced water gas shift  

SciTech Connect (OSTI)

Catalytic hydrogen production and CO removal in a post-reforming process are critical for low-temperature fuel cell applications. The present study aims at clarifying the role of metal components in bimetallic catalysts for oxygen-enhanced water gas shift (OWGS), wherein a small amount of O{sub 2} is added to H{sub 2}-rich reformate gas to enhance CO shift. Among CeO{sub 2}-supported bimetallic catalysts, Pd-Cu and Pt-Cu combinations were found to show strong synergetic promoting effect in OWGS, which leads to much higher CO conversion and higher H{sub 2} yield than WGS at low temperature around 250 C. Temperature programmed reduction (TPR) showed strong interaction between Pd and Cu in Pd-Cu/CeO{sub 2} by a single reduction peak in contrast to multiple peaks on monometallic Cu/CeO{sub 2}. Extended X-ray absorption fine structure (EXAFS) analysis revealed that such bimetallic Pd-Cu and Pt-Cu form alloy nanoparticles, where noble metal is mainly surrounded by Cu atoms. Oxygen storage capacity (OSC) measurements point to higher resistance of Pd-Cu to oxidation indicating that Pd keeps Cu in reduced state in air pulse condition. From kinetic study, Pd in Pd-Cu was found to promote CO shift, rather than CO oxidation by increasing the number of active sites and by suppressing H{sub 2} activation (that is inherent to monometallic Pd), which minimizes both the inhibition effect of H{sub 2} and the loss of H{sub 2} by oxidation in OWGS. Transient response technique revealed that Cu in Pd-Cu enhances desorption of strongly chemisorbed CO{sub 2} on catalyst surface in contrast to very slow CO{sub 2} desorption from surface of monometallic Pd. Thus, the excellent OWGS activity of Pd-Cu catalyst has been attributed to the complementary roles of the two metals for enhancing CO shift, which is realized by its alloy structure and the accompanying strong interaction between metal components.

Kugai, J.; Miller, J. T.; Guo, N.; Song, C. (Chemical Sciences and Engineering Division); ( PSC-USR); (Penn State Univ.)

2011-06-01T23:59:59.000Z

427

Effects of Ce, Y and Mo Addition on the Stress Accelerated Oxidation of Austenitic Stainless Steel in Oxygenated High Temperature Water  

SciTech Connect (OSTI)

Based upon the recent progress in mechanistic understanding of intergranular stress corrosion cracking (IGSCC) of austenitic stainless steels in high temperature water in light water reactor (LWR), the effects of Ce, Y, and Mo addition on oxidation kinetics under a tensile stress condition was investigated. Minor impurity of P was also studied. A kind of circumferentially notched tensile specimen was prepared to simulate the crack tip stress field. The notched specimens of different materials studied were applied with an almost constant load in simulated boiling water reactor (BWR) water. The oxidation was examined by the specimen cross section. It was shown that these elements have quite clear effects on the metal oxidation and alloying element distribution in the oxide layer. (authors)

Shengchun Wang; Nobuaki Kawaguchi; Tetsuo Shoji [Fracture Research Institute, Graduate School of Engineering, Tohoku University, Aramaki Aoba 01, Aoba-ku, Sendai 980-8579 (Japan)

2004-07-01T23:59:59.000Z

428

Data:Ef0bd4a8-7702-40c5-b219-2bb62c8ce86b | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Pagec-01b596aa1744b55997c1ccEeae2669-ec94-4cc4-bbae-0108084310cc No revisionEeff1def-7e95-4771-8e9e-ee90ccda06c39-2bb62c8ce86b

429

Data:F8c182e5-1529-4f79-a950-78d40ce901b5 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision has been approved for this page.b4-a4ba-cd54152b87244538a159a88b1cfdf3faa6e2b6068c0c3 No0-78d40ce901b5 No

430

Data:594c709d-5390-4aed-bb54-4ce6a95c016e | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3a87dcc95b3da-78f7ef0b79f6 No446b-9fca-d407954a4b84bf7e33133cb0bb54-4ce6a95c016e No revision has

431

Data:34a21ce1-0194-40b3-87b9-32879aa163f4 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3 Noc7e1a8ffe No869d7ced0c4aa77f45ad4a No4059736ce1f Nobff01-695b-433f-81b0-2c98014610bf

432

Data:36961e2d-e330-420a-ad76-373e275e4ce2 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3 Noc7e1a8ffe No869d7ced0c4aa77f45ad4ae-5b31d61e0d79193a29b0f907010bfa1 Noad76-373e275e4ce2 No

433

Data:3b340e08-131e-431f-82ba-b217ce8f1448 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3 Noc7e1a8ffef-15f046e6d97e No revisionfb5101c21c4f7bd9e51e91 No0491bd93 No revisionba-b217ce8f1448

434

Data:3baed58c-e8e3-4cde-9f5f-e7605a21c900 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3 Noc7e1a8ffef-15f046e6d97e Nobaed58c-e8e3-4cde-9f5f-e7605a21c900 No revision has been approved for

435

Evidence for anisotropic triplet superconductor order parameter in half metallic ferromagnetic La_0.7Ca_0.3MnO_3 proximity coupled to superconducting Pr_1.85Ce_0.15CuO_4  

E-Print Network [OSTI]

Scanning tunneling spectroscopy measurements performed on La_0.7Ca_0.3MnO_3 (LCMO) films epitaxially grown on Pr_1.85Ce_0.15CuO_4 (PCCO) reveal localized penetration of superconductivity into the LCMO up to distances much larger than is possible...

Kalcheim, Y.; Millo, O.; Egilmez, M.; Robinson, J. W. A.; Blamire, M. G.

2012-03-07T23:59:59.000Z

436

Gorur D, Rasmussen CE. Dirichlet process Gaussian mixture models: Choice of the base distribution. JOURNAL OF COMPUTER SCIENCE AND TECHNOLOGY 25(4): 615626 July 2010/DOI 10.1007/s11390-010-1051-1  

E-Print Network [OSTI]

G¨or¨ur D, Rasmussen CE. Dirichlet process Gaussian mixture models: Choice of the base distribution Rasmussen2,3 1 Gatsby Computational Neuroscience Unit, University College London, London WC1N 3AR, U.K. 2 Department of Engineering, University of Cambridge, Cambridge CB2 1PZ, U.K. 3 Max Planck Institute

Edinburgh, University of

437

En forkortet udgave af denne kommentar blev bragt i Berlingske Tidende, 2. sektion (Magasin s. 14), lrdag den 21. januar 2006 (online her: http://www.nbi.dk/~emmeche/cePubl/2006a.forskpol.html).  

E-Print Network [OSTI]

), lørdag den 21. januar 2006 (online her: http://www.nbi.dk/~emmeche/cePubl/2006a gang præges af den lineære models logik, og at de teknologiske, såkaldt våde områder af forskningen

Emmeche, Claus

438

College of AgriCulturAl SCienCeS AgriCulturAl reSeArCh And CooperAtive extenSion Access and AllocAtion of  

E-Print Network [OSTI]

College of AgriCulturAl SCienCeS · AgriCulturAl reSeArCh And CooperAtive extenSion Access and Alloc- gation, recreation, and hydro- electric power generation, do not involve withdrawing water from its level of government is best suited to regulate water use. Predictions that climate change will influence

Boyer, Elizabeth W.

439

CO Oxidation on Inverse CeOx/Cu(111) Catalysts: High Catalytic Activity and Ceria-Promoted Dissociation of O2  

SciTech Connect (OSTI)

A Cu(111) surface displays a low activity for the oxidation of carbon monoxide (2CO + O{sub 2} {yields} 2CO{sub 2}). Depending on the temperature, background pressure of O{sub 2}, and the exposure time, one can get chemisorbed O on Cu(111) or a layer of Cu{sub 2}O that may be deficient in oxygen. The addition of ceria nanoparticles (NPs) to Cu(111) substantially enhances interactions with the O{sub 2} molecule and facilitates the oxidation of the copper substrate. In images of scanning tunneling microscopy, ceria NPs exhibit two overlapping honeycomb-type moire structures, with the larger ones (H{sub 1}) having a periodicity of 4.2 nm and the smaller ones (H{sub 2}) having a periodicity of 1.20 nm. After annealing CeO{sub 2}/Cu(111) in O{sub 2} at elevated temperatures (600-700 K), a new phase of a Cu{sub 2}O{sub 1+x} surface oxide appears and propagates from the ceria NPs. The ceria is not only active for O{sub 2} dissociation, but provides a much faster channel for oxidation than the step edges of Cu(111). Exposure to CO at 550-750 K led to a partial reduction of the ceria NPs and the removal of the copper oxide layer. The CeO{sub x}/Cu(111) systems have activities for the 2CO + O{sub 2} {yields} 2CO{sub 2} reaction that are comparable or larger than those reported for surfaces of expensive noble metals such as Rh(111), Pd(110), and Pt(100). Density-functional calculations show that the supported ceria NPs are able to catalyze the oxidation of CO due to their special electronic and chemical properties. The configuration of the inverse oxide/metal catalyst opens new interesting routes for applications in catalysis.

F Yang; J Graciani; J Evans; P Liu; J Hrbek; J Fdez. Sanz; J Rodriguez

2011-12-31T23:59:59.000Z

440

Effect of synthesis conditions on the nanopowder properties of Ce{sub 0.9}Zr{sub 0.1}O{sub 2}  

SciTech Connect (OSTI)

Graphical abstract: . The synthesis of nanocrystalline Ce{sub 0.9}Zr{sub 0.1}O{sub 2} powders via the gel-combustion method, using different fuels, and following either stoichiometric or non-stoichiometric pH-controlled routes is investigated. Research highlights: {yields} All samples exhibited the fluorite-type crystal structure, nanometric average crystallite size and negligible carbon content. {yields} Synthesis conditions strongly affect the average crystallite size, the degree of agglomeration, the specific surface area and the pore volume. {yields} Our results indicate that, by controlling the synthesis conditions it is possible to obtain solids with custom-made morphological properties. -- Abstract: In this work, the synthesis of nanocrystalline Ce{sub 0.9}Zr{sub 0.1}O{sub 2} powders via the gel-combustion method, using different fuels, and following either stoichiometric or non-stoichiometric pH-controlled routes is investigated. The objective is to evaluate the effect of synthesis conditions on the textural and morphological properties, and the crystal structure of the synthesized materials. The solids were characterized by nitrogen physisorption, Scanning Electron Microscopy (SEM), X-ray powder diffraction (XPD), and Carbon-Hydrogen-Nitrogen Elemental Analysis (CHN). All the powders exhibited nanometric crystallite size, fluorite-type structure and negligible carbon content. Synthesis conditions strongly affect the average crystallite size, the degree of agglomeration, the specific surface area and the pore volume. Our results indicate that, by controlling the synthesis conditions it is possible to obtain solids with custom-made morphological properties.

Zimicz, M.G.; Fabregas, I.O.; Lamas, D.G. [CINSO (Centro de Investigaciones en Solidos) CONICET-CITEFA J.B. de La Salle 4397, 1603 Villa Martelli, Pcia. de Buenos Aires (Argentina)] [CINSO (Centro de Investigaciones en Solidos) CONICET-CITEFA J.B. de La Salle 4397, 1603 Villa Martelli, Pcia. de Buenos Aires (Argentina); Larrondo, S.A., E-mail: susana@di.fcen.uba.ar [Laboratorio de Procesos Cataliticos, Departamento de Ingenieria Quimica, Facultad de Ingenieria, Universidad de Buenos Aires, Pabellon de Industrias, Ciudad Universitaria, 1428 Buenos Aires (Argentina)

2011-06-15T23:59:59.000Z

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


441

Microsoft Word - OC_labwide_calendar_procedures_20140908.docx  

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

fermipoint.fnal.govorganizationocooocomShared%20DocumentsOClabwidecalendar procedures20140908.pdf PURPOSE O F T HIS P ROCEDURE This p rocedure o utlines h ow t o v iew,...

442

HYDROLYSIS AND FORMATION CONSTANTS AT 25oC  

E-Print Network [OSTI]

plutonium, neptunium and americium. Hydrolysis values havecopper(6,3o), Allard for americium and curium (29 ) , and

Phillips, S.L.

2010-01-01T23:59:59.000Z

443

Microsoft Word - oc-labwide-calendar-procedures-20150202.docx  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: VegetationEquipment SurfacesResource Program PreliminaryA Trimodal SizePreliminaryTypesH.EnergyLabwide c

444

HNF-SD-WM-TI-740, Rev. OC  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFun with Big Sky9, 2010 The meeting was called1999Harvest84047 HNF-SD-WM-TI-740,

445

Enhancing the Commissioning Process on Multi-Building Projects with Six Sigma Tools/Techniques  

E-Print Network [OSTI]

ro ng boxshadowdwn Mo th er N atu re 1 00 de gr ee s & hu mi d pg : 1 3 20 07 IC EB O Sa n F ran cis co , C a Ta rg et US L LS L Ce nt er Pr oc es s Re du ce Sp re ad Th e S tat ist ica l O bje cti ve of S ix Sig ma Th e S tat ist ica l O bje....3 % ou tsi de of cu sto me r s pe cs on ac cu ra cy 75 0 u nh ap py cu sto me rs ev er y m on th du e t o a cc ur ac y 99 .7% w ith in sp ec m ay so un d g oo d, bu t it m ay no tb e go od fo r t he cu sto me r pg : 1 7 20 07 IC EB O Sa n...

Buck, L.

2007-01-01T23:59:59.000Z

446

Crystal structure, magnetism and transport properties of Ce{sub 3}Ni{sub 25.75}Ru{sub 3.16}Al{sub 4.1}B{sub 10}  

SciTech Connect (OSTI)

Single crystals of Ce{sub 3}Ni{sub 25.75}Ru{sub 3.16}Al{sub 4.1}B{sub 10} were obtained from a process in which a polycrystalline sample of CeRu{sub 2}Al{sub 2}B was annealed in an excess of a NiIn flux. The initial phase, CeRu{sub 2}Al{sub 2}B, does not recrystallize, instead, crystals of a new phase, Ce{sub 3}Ni{sub 25.75}Ru{sub 3.16}Al{sub 4.1}B{sub 10}, could be isolated once the flux was removed. The title compound crystallizes in the tetragonal space group P4/nmm (No. 129) with a=1139.02(8), c=801.68(6) pm (c/a=0.70) in the Nd{sub 3}Ni{sub 29}Si{sub 4}B{sub 10} structure type. Electrical resistivity measurements reveal metallic behavior with a minimum of 700 ? cm and a small residual resistivity ratio of RRR=1.4 indicating a large amount of disorder scattering. The cerium atoms are either in the 4+ or an intermediate valence state with a valence fluctuation temperature far above room temperature. - Graphical abstract: Single crystals of Ce{sub 3}Ni{sub 25.75}Ru{sub 3.16}A{sub l4.1}B{sub 10} were obtained using a process in which a polycrystalline sample of CeRu{sub 2}Al{sub 2}B was annealed in an excess of a NiIn flux. Electrical resistivity measurements reveal metallic behavior with a minimum of 700 ?? cm and a small residual resistivity ratio of RRR=1.4 indicating a large amount of disorder scattering. The cerium atoms are either in the 4+ or an intermediate valence state with a valence fluctuation temperature far above room temperature. Display Omitted - Highlights: Flux synthesis of high quality single crystals of Ce{sub 3}Ni{sub 25.75}Ru{sub 3.16}Al{sub 4.1}B{sub 10} is presented along with the crystal structure, magnetic and transport properties. The compound is isostructural to Nd{sub 3}Ni{sub 29}Si{sub 4}B{sub 10} but is first of this structure type showing mixed occupancies of d-elements. This is an intermetallic phase with Ce in either the 4+ or an intermediate valence state. The fact that this structure with mixed occupied transition metal sites exists suggests that more compounds of this type should be accessible and the physical properties tuned.

Janka, Oliver [Department of Chemistry, University of California, One Shields Ave, Davis, CA 95616 (United States); Baumbach, Ryan E.; Thompson, Joe D. [Los Alamos National Laboratory, Los Alamos, NM 87545 (United States); Bauer, Eric D., E-mail: edbauer@lanl.gov [Los Alamos National Laboratory, Los Alamos, NM 87545 (United States); Kauzlarich, Susan M., E-mail: smkauzlarich@ucdavis.edu [Department of Chemistry, University of California, One Shields Ave, Davis, CA 95616 (United States)

2013-09-15T23:59:59.000Z

447

Wet oxidation of phenol on Ce{sub 1{minus}x}Cu{sub x}O{sub 2{minus}{delta}} catalyst  

SciTech Connect (OSTI)

Ce{sub 1{minus}x}Cu{sub x}O{sub 2{minus}{delta}} catalysts with 0.05 < x < 0.20 for catalytic wet oxidation of phenol in aqueous solutions have been synthesized using the coprecipitation method. The three most important synthesis parameters, the concentration of the mixed metal salt solution, the rate of coprecipitant addition and the stirrer speed during coprecipitation, were optimized with central composite design using the catalytic activity as a response function. The catalytic activity strongly depends on stirrer speed during coprecipitation. A high mutual dispersion of copper oxide and ceria, having the average crystallite size of about 9 nm, enhances solid solution formation. The unit cell parameter of ceria decreases when the overall concentration of copper in the catalyst increases, most probably obeying Vegard`s law. The catalysts proved to be very stable in hydrothermal reaction conditions at low pH values. After 5 h of reaction in the semibatch CST reactor less than 100 ppm of Cu was leached out of catalyst samples that were calcined in a flow of air for 2 h above 1033 K, and only a very low quantity of carbonaceous deposits were formed on the surface of the catalysts (0.6 wt%). The kinetics of phenol degradation could be interpreted by an equation valid for homogeneous autocatalytic reactions, in which the rate constant depends linearly on the heterogeneous catalyst (Cu) concentrations. This demonstrates that the reaction proceeds through a heterogeneous-homogeneous radical-branched chain mechanism.

Hocevar, S.; Batista, J. [National Inst. of Chemistry, Ljubljana (Slovenia). Lab. of Catalysis and Chemical Reaction Engineering] [National Inst. of Chemistry, Ljubljana (Slovenia). Lab. of Catalysis and Chemical Reaction Engineering; Levec, J. [National Inst. of Chemistry, Ljubljana (Slovenia). Lab. of Catalysis and Chemical Reaction Engineering] [National Inst. of Chemistry, Ljubljana (Slovenia). Lab. of Catalysis and Chemical Reaction Engineering; [Univ. of Ljubljana (Slovenia). Dept. of Chemical Engineering

1999-05-15T23:59:59.000Z

448

Introduction of Artificial Pinning Center into PLD-YBCO Coated Conductor on IBAD and Self-Epitaxial CeO2 Buffered Metal Substrate  

SciTech Connect (OSTI)

In order to fabricate YBa2Cu3O7-x (YBCO) coated conductors with high critical current density Jc in magnetic fields, we fabricated YBCO coated conductors with artificial pinning centers by the pulsed laser deposition (PLD) method on a self epitaxial PLD-CeO2 layer and ion-beam assisted deposition (IBAD)-Gd2Zr2O7 (GZO) buffered Hastelloy tape. Artificial pinning centers were introduced by the PLD deposition using the yttria-stabilized zirconia (YSZ) oxide target (nano-dot method) and YBCO target including YSZ particles (mixed target method). In the experiments using YSZ oxide target, YSZ nano-dots were observed. They were approximately 15 nm in height and 10 nm to 70 nm in diameter. We found that the density of nano-dots was controlled by the number of laser pulses. These samples exhibited higher Jc than YBCO films in magnetic fields. Furthermore, a similar improvement of Jc was observed in the experiments using YBCO target including YSZ particles. TEM observation revealed that columnar nano-structure made of BaZrO3 was formed during YBCO deposition and it was effective for pinning. We call this new epitaxial nano-structure 'bamboo structure' from its anisotropic growth and morphology.

Kobayashi, H.; Yamada, Y.; Ishida, S.; Takahashi, K.; Konishi, M.; Ibi, A.; Miyata, S. [Superconductivity Research Laboratory, ISTEC, 2-4-1 Mutsuno, Atsuta-ku, Nagoya, 456-8587 (Japan); Kato, T.; Hirayama, T. [Materials R and D Laboratory, Japan Fine Ceramics Center, 2-4-1 Mutsuno, Atsuta-ku, Nagoya 456-8587 (Japan); Shiohara, Y. [Superconductivity Research Laboratory, ISTEC, 1-10-13 Shinonome, Koto-ku, Tokyo 135-0062 (Japan)

2006-03-31T23:59:59.000Z

449

Quantum Critical Fluctuations in the Heavy fermion compound Ce(Ni0.935Pd0.065)2Ge2  

SciTech Connect (OSTI)

Electric resistivity, specific heat, magnetic susceptibility, and inelastic neutron scattering experi- ments were performed on a single crystal of the heavy fermion compound Ce(Ni0.935Pd0.065)2Ge2 in order to study the spin fluctuations near an antiferromagnetic (AF) quantum critical point (QCP). The resistivity and the specific heat coefficient for T = 1 K exhibit the power law behavior expected for a 3D itinerant AF QCP (?(T) ~ T^3/2 and ?(T) ~ ?0 -bT^1/2). However, for 2 = T = 10 K, the susceptibility and specific heat vary as logT and the resistivity varies linearly with temperature. Furthermore, despite the fact that the resistivity and specific heat exhibit the non-Fermi liquid behavior expected at a QCP, the correlation length, correlation time, and staggered susceptibility of the spin fluctuations remain finite at low temperature. We suggest that these deviations from the divergent behavior expected for a QCP may result from alloy disorder.

C. H. Wang; L. Poudel; A. E. Taylor; J. M. Lawrence; A. D. Christianson; S. Chang; J. A. Rodriguez-Rivera; J. W. Lynn; A. A. Podlesnyak; G. Ehlers; R. E. Baumbach; E. D. Bauer; K. Gofryk; F. Ronning; K. J. McClellan; J. D. Thompson

2014-12-01T23:59:59.000Z

450

An In-Situ XAS Study of the Structural Changes in a CuO-CeO2/Al2O3 Catalyst during Total Oxidation of Propane  

SciTech Connect (OSTI)

A CuOx-CeOx/Al2O3 catalyst was studied with in-situ transmission Cu K XAS for the total oxidation of propane as model reaction for the catalytic elimination of volatile organic compounds. The local Cu structure was determined for the catalyst as such, after pre-oxidation and after reduction with propane. The catalyst as such has a local CuO structure. No structural effect was observed upon heating in He up to 600 deg. C or after pre-oxidation at 150 deg. C. A full reduction of the Cu2+ towards metallic Cu0 occurred, when propane was fed to the catalyst. The change in local Cu structure during propane reduction was followed with a time resolution of 1 min. The {chi}(k) scans appeared as linear combinations of start and end spectra, CuO and Cu structure, respectively. However, careful examination of the XANES edge spectra indicates the presence of a small amount of additional Cu1+ species.

Silversmith, Geert; Poelman, Hilde; Poelman, Dirk; Gryse, Roger de [Ghent University, Department of Solid State Sciences, Krijgslaan 281 S1, B-9000 Gent (Belgium); Olea, Maria; Balcaen, Veerle; Heynderickx, Philippe; Marin, Guy B. [Ghent University, Laboratorium voor Petrochemische Techniek, Krijgslaan 281 S5, B-9000 Gent (Belgium)

2007-02-02T23:59:59.000Z

451

Effects of flux additives on the characteristics of Y{sub 2.95}Al{sub 5}O{sub 12}:0.05Ce{sup 3+} phosphor: Particle growth mechanism and luminescence  

SciTech Connect (OSTI)

The dependence of the amount of the BaF{sub 2} flux additive on the luminescence of Y{sub 2.95}Al{sub 5}O{sub 12}:0.05Ce{sup 3+} phosphors was investigated. The integrated emission intensity of Y{sub 2.95}Al{sub 5}O{sub 12}:0.05Ce{sup 3+} prepared without the flux was enhanced by 29% with the addition of BaF{sub 2} flux at the optimum amount of 6?wt.%. Such an enhancement can be attributed to the purer phase of Y{sub 3}Al{sub 5}O{sub 12} and the morphology change from the irregular shape to spherical shape with the smoother surface due to the flux. The morphology and luminescence of Y{sub 2.95}Al{sub 5}O{sub 12}:0.05Ce{sup 3+} prepared with the 6?wt.% BaF{sub 2} flux additive (Sample II) were further compared with those of Y{sub 2.95}Al{sub 5}O{sub 12}:0.05Ce{sup 3+} prepared with the 7?wt.% H{sub 3}BO{sub 3} flux additive (Sample I). The particle size, particle shape, and integrated emission intensity (?{sub ex}?=?450?nm) of the former were found to be larger, more regular, and 6% higher than those of the latter. The difference in the morphology of Samples I and II, which led to the difference in the emission intensity and the external quantum efficiency, were well explained by the particle growth mechanism.

Chiang, Chung-Hao; Liu, Te-Hsing; Lin, Han-Yu; Kuo, Hung-Yi [Department of Electrical Engineering, National Cheng Kung University, Tainan 701, Taiwan (China); Chu, Sheng-Yuan, E-mail: chusy@mail.ncku.edu.tw [Department of Electrical Engineering, National Cheng Kung University, Tainan 701, Taiwan (China); Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 701, Taiwan (China)

2013-12-28T23:59:59.000Z

452

Probing local structure in the yellow phosphor LaSr[subscript 2]AlO[subscript 5]:Ce[superscript 3+], by the maximum entropy method and pair distribution function analysis  

SciTech Connect (OSTI)

The compound LaSr{sub 2}AlO{sub 5} was recently introduced as a competitive Ce{sup 3+} host material for blue-pumped yellow phosphors for use in white light emitting diodes. A crucial feature of the crystal structure of LaSr{sub 2}AlO{sub 5} is that La, which is the host site for Ce{sup 3+}, is located in the 8h positions of the I4/mcm crystal structure, a site equally shared with Sr. While the average crystal structure of LaSr{sub 2}AlO{sub 5} as revealed by Rietveld analysis of laboratory and synchrotron X-ray diffraction data suggests nothing untoward, maximum entropy method analysis of the synchrotron X-ray data reveals the existence of conspicuous non-sphericity of the electron density. Pair distribution function analysis of the data suggests that despite their occupying the same crystallographic site, La and Sr possess distinct coordination environments, and the environment around La is more compact and regular than the environment suggested by the Rietveld refinement of the average structure. The absorption and emission from Ce{sup 3+} centers is controlled by the local coordination and symmetry, and the use of powerful new tools in unraveling details of these strengthens the rational search for new phosphors for solid state white lighting.

Im, Won Bin; Page, Katharine; DenBaars, Steven P.; Seshadri, Ram (UCSB); (LANL)

2011-08-04T23:59:59.000Z

453

Hydrogen for X-group exchange in CH3X, X = Cl, Br, I, OMe and NMe2 byMonomeric [1,2,4-(Me3C)3C5H2]2CeH: Experimental and Computational Support for a Carbenoid Mechanism  

SciTech Connect (OSTI)

The reaction between [1,2,4-(Me3C)3C5H2]2CeH, referred to as Cp'2CeH, andCH3X where X is Cl, Br, I, OMe and NMe2, are described. The reactions fall intothree distinct classes. Class a, where X = Cl, Br and I rapidly form Cp'2CeX and CH4without formation of identifiable intermediates in the 1H NMR spectra. Class b, whereX = OMe proceeds rapidly to Cp'2Ce(eta2-CH2OMe) and H2 and then to Cp'2CeOMeand CH4. The methoxymethyl derivative is sufficiently stable to be isolated andcharacterized and it is rapidly converted to Cp'2CeOMe in presence of BPh3. Class c,where X = NMe2 does not result in formation of Cp'2CeNMe2, but deuterium labelingexperiments show that H for D exchange occurs in NMe3. Density functionalcalculations DFT(B3PW91) on the reaction of (C5H5)2CeH, referred to as Cp2CeH,and CH3X show that the barrier for alpha-CH activation, resulting in formation ofCp2Ce(eta2-CH2X), proceeds with a relatively low activation barrier (DeltaG++) but thesubsequent ejection of CH2 and trapping by H2 has a higher barrier; the height of thesecond barrier lies in the order F, Cl, Br, I< OMe<< NMe2, consistent with theexperimental studies. The DFT calculations also show that the two-step reaction,which proceeds through a carbenoid intermediate, has a lower barrier than a directone-step sigma bond metathesis mechanism. The reaction of Cp2CeCH2OMe and BPh3 is calculated to be a low barrier process and the ylide, CH2(+)BPh3(-), is a transition state and not an intermediate.

Werkema, Evan; Andersen, Richard; Yahia, Ahmed; Maron, Laurent; Eisenstein, Odile

2009-05-15T23:59:59.000Z

454

University of Puerto Rico -Ro Piedras May 16, 2013  

E-Print Network [OSTI]

Biology? Implementation of engineering principles and mathematical modeling to the design and construction of biological parts, devices, and systems with applications in energy, medicine, and technology. www.bio of Medicines 10¢ per pill Saturday, May 18, 13 #12;Biofuels from Algae CO -neutral2 1,000,000 gallons in 2008

Campbell, A. Malcolm

455

r@ snpreruzn W rrwnsr-re Dr RoNIA  

E-Print Network [OSTI]

Presidente Gomponente Componente lldirettore de|CRPSM Prof. Carlo Ulivieri $;Ppl{-0o.-' Università degli

Guidoni, Leonardo

456

p ro g r a m m E Built Environment  

E-Print Network [OSTI]

: www.slu.se/environ/built Monitoring urban development Researchers at SLU are examining the problem for children on different scales from micro levels such as schoolyards, to larger-scale environments

457

ARM - VAP Product - mmcrmode4ro200309091cloth  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD) byProductsbsrncalcbsrncalc6161cloth Documentation Data Management Facility Plots (Quickro200309091cloth

458

ARM - VAP Product - mmcrmode4ro200404141cloth  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD) byProductsbsrncalcbsrncalc6161cloth Documentation Data Management Facility Plots

459

ARM - VAP Product - mmcrmode4ro200712011cloth  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD) byProductsbsrncalcbsrncalc6161cloth Documentation Data Management Facility Plots712011cloth

460

STATEMENT AND ACKNOWLEDGMENT Expires:e r/o2014  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared0 ResourceAwards SAGEComplainant, V. UNITED STATESWASHINGTON":

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


461

Ingenieurb ro f r Energieanlagen IBE | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy Resources Jump to:46 - 429 Throttled (bot load) Error 429IndianaProfessional JumpInfoSpiIngIngenero Ptyr

462

Copy of Capitalized Property RO23_120213_1.xlsx  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed Newcatalyst phases on &gamma;-Al2O3. | EMSL Coordinatively- EnergyCapitalized

463

Vapor phase ketonization of acetic acid on ceria based metal oxides  

SciTech Connect (OSTI)

The activities of CeO2, Mn2O3-CeO2 and ZrO2-CeO2 were measured for acetic acid ketonization under reaction conditions relevant to pyrolysis vapor upgrading. We show that the catalyst ranking changed depending on the reaction conditions. Mn2O3-CeO2 was the most active catalyst at 350 oC, while ZrO2 - CeO2 was the most active catalyst at 450 oC. Under high CO2 and steam concentration in the reactants, Mn2O3-CeO2 was the most active catalyst at 350 and 450 C. The binding energies of steam and CO2 with the active phase were calculated to provide the insight into the tolerance of Mn2O3-CeO2 to steam and CO2.

Liu, Changjun; Karim, Ayman M.; Lebarbier, Vanessa MC; Mei, Donghai; Wang, Yong

2013-12-01T23:59:59.000Z

464

A Brief Review of Past INL Work Assessing Radionuclide Content in TMI-2 Melted Fuel Debris: The Use of 144Ce as a Surrogate for Pu Accountancy  

SciTech Connect (OSTI)

This report serves as a literature review of prior work performed at Idaho National Laboratory, and its predecessor organizations Idaho National Engineering Laboratory (INEL) and Idaho National Engineering and Environmental Laboratory (INEEL), studying radionuclide partitioning within the melted fuel debris of the reactor of the Three Mile Island 2 (TMI-2) nuclear power plant. The purpose of this review is to document prior published work that provides supporting evidence of the utility of using 144Ce as a surrogate for plutonium within melted fuel debris. When the TMI-2 accident occurred no quantitative nondestructive analysis (NDA) techniques existed that could assay plutonium in the unconventional wastes from the reactor. However, unpublished work performed at INL by D. W. Akers in the late 1980s through the 1990s demonstrated that passive gamma-ray spectrometry of 144Ce could potentially be used to develop a semi-quantitative correlation for estimating plutonium content in these materials. The fate and transport of radioisotopes in fuel from different regions of the core, including uranium, fission products, and actinides, appear to be well characterized based on the maximum temperature reached by fuel in different parts of the core and the melting point, boiling point, and volatility of those radioisotopes. Also, the chemical interactions between fuel, fuel cladding, control elements, and core structural components appears to have played a large role in determining when and how fuel relocation occurred in the core; perhaps the most important of these reaction appears to be related to the formation of mixed-material alloys, eutectics, in the fuel cladding. Because of its high melting point, low volatility, and similar chemical behavior to plutonium, the element cerium appears to have behaved similarly to plutonium during the evolution of the TMI-2 accident. Anecdotal evidence extrapolated from open-source literature strengthens this logical feasibility for using cerium, which is rather easy to analyze using passive nondestructive analysis gamma-ray spectrometry, as a surrogate for plutonium in the final analysis of TMI-2 melted fuel debris. The generation of this report is motivated by the need to perform nuclear material accountancy measurements on the melted fuel debris that will be excavated from the damaged nuclear reactors at the Fukushima Daiichi nuclear power plant in Japan, which were destroyed by the Tohoku earthquake and tsunami on March 11, 2011. Lessons may be taken from prior U.S. work related to the study of the TMI-2 core debris to support the development of new assay methods for use at Fukushima Daiichi. While significant differences exist between the two reactor systems (pressurized water reactor (TMI-2) versus boiling water reactor (FD), fresh water post-accident cooing (TMI-2) versus salt water (FD), maintained containment (TMI-2) versus loss of containment (FD)) there remain sufficient similarities to motivate these comparisons.

D. L. Chichester; S. J. Thompson

2013-09-01T23:59:59.000Z

465

civil & environmental (CE) CE / ENE overview programs available  

E-Print Network [OSTI]

: transportation systems, water supply and waste disposal systems, and industrial and commercial structures. They face the challenges of replacing our nation's aging infrastructure -- highways, bridges, wharf

Rohs, Remo

466

Amerikooler: Order (2013-CE-5307)  

Broader source: Energy.gov [DOE]

DOE ordered Amerikooler, Inc. to pay a $8,000 civil penalty after finding Amerikooler had failed to certify that certain models of walk-in cooler and freezer components comply with the applicable energy conservation standards.

467

Trastar: Order (2013-CE-49003)  

Broader source: Energy.gov [DOE]

DOE ordered Trastar Inc. to pay a $8,000 civil penalty after finding Trastar had failed to certify that certain basic models of traffic signal modules and pedestrian modules comply with the applicable energy conservation standards.

468

Keystone: Order (2013-CE-2601)  

Broader source: Energy.gov [DOE]

DOE ordered Keystone Technologies, LLC to pay a $8,000 civil penalty after finding Keystone had failed to certify that certain models of fluorescent lamp ballasts comply with the applicable energy conservation standards.

469

Trojan: Order (2011-CE-2704)  

Broader source: Energy.gov [DOE]

DOE ordered Trojan, Inc. to pay a $6,000 civil penalty after finding Trojan had failed to certify that certain models of incandescent reflector lamps comply with the applicable energy conservation standards.

470

Versonel: Order (2014-CE-21009)  

Broader source: Energy.gov [DOE]

DOE ordered Smart Surplus, Inc. d/b/a Versonel to pay a $8,000 civil penalty after finding Versonel had failed to certify that certain models of refrigerators and residential clothes dryers comply with the applicable energy conservation standards.

471

Dacor: Order (2014-CE-23010)  

Broader source: Energy.gov [DOE]

DOE ordered Dacor to pay a $8,000 civil penalty after finding Dacor had failed to certify that certain models of cooking products comply with the applicable energy conservation standards.

472

Northland: Order (2014-CE-23002)  

Broader source: Energy.gov [DOE]

DOE ordered Northland Corporation d/b/a AGA Marvel to pay a $16,000 civil penalty after finding Northland had failed to certify that certain models of cooking products comply with the applicable energy conservation standards.

473

NCBECS C&E 1979  

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

9. Distribution of Commercial Buildings Supplied with Fuel Oil, by Number of Tanks, Tank CapaciLy, and Inventory, as of January 1, 1980 (Thousands of Buildings)...

474

Data:F1f3858b-c287-49da-a1b4-85ce4a5fc431 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision has been approved for this page. It is currently-4fb5-8904-6cd8e9e0b38fba84a6aa6df6ceaa6c7ce4a5fc431 No

475

Data:F92c544c-3b0b-45b4-b1f8-f3e5cb16ce18 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision has been approved for thisd785796ade47 No revision has been approved for3edd1ac78af9e5cb16ce18 No

476

Data:66100d7e-d6c0-4b7f-9c58-2f836fd42ce6 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revision has been approved fore6e8eee4495-afb210887c9bf3ac6ed3cc6f836fd42ce6 No revision has been

477

Data:Ef26bb38-5a0f-4e06-b1e4-0ce2b0e0031a | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address:011-DNA Jump to:52c8ff988c1 No revisionEf26bb38-5a0f-4e06-b1e4-0ce2b0e0031a No revision

478

Data:2cf3ad84-26b8-4b48-ab0e-ce6ea61b1eb3 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of48d9ff47edf3 Noc7e1a8ffe No revisionbeb-403f-b787-2700a3b20e2e No revision has been approvede-ce6ea61b1eb3 No

479

Data:B3f47f3a-a384-4b46-991c-e2db449df0ab | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2 No revision has38865d08 No revision has been28a07c581c-e2db449df0ab No revision has been approved for

480

Data:6312d6f0-b4f9-4e0a-b53b-1ce45eb56c46 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revision has been approved fore6e8eee44 No revision has been8efe6555aea3 Nodb868e8293b95ce0c2594

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


481

Data:08a3be8d-d283-45fb-9d0b-bf1b1ce6c9c9 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentratingRenewable Solutions6ae4e73fc Nof7e0a4fbc9b253bedd No revisionc872f0ecb1ce6c9c9 No

482

Data:A3e72b30-c43e-4c72-9e83-d1809f0ce9e0 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 Nod2db5b31cb44 No revision-b209-069dd1fd7c05a97219c78 No revisionb2e8-1071b14e9956 No revisionf0ce9e0

483

Data:Ac9a2d40-10ea-498d-ad30-a4ce1d3e29b7 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2 No revision has been approved for this page. It is currentlya4ce1d3e29b7 No revision has been approved

484

Data:8b8b43e6-f48c-4c19-985e-f23afd7ce5d4 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revisione0a2d50bdf No18fed1db5 No revision40a8-a6bf-0166ba6ac8c0 No revisionf23afd7ce5d4 No revision

485

Data:Ce209a8b-6d4e-47f3-ab94-30a87d48c7e3 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 Nodbb-44ce-80f8-79eb97a58f0a No revision has been approved forcdfe22397

486

Data:Dd4c985c-73c7-4f1b-a774-9964f2dd7ce5 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Pagec-01b596aa1744 NoDce066cd-9c07-4949-aa43-5e5007829464 No revision has been approvedf2dd7ce5 No revision has been approved

487

Long-range ordering of reduced magnetic moments in the spin-gap compound CeOs{sub 2}Al{sub 10} as seen via muon spin relaxation and neutron scattering  

SciTech Connect (OSTI)

We have carried out neutron diffraction, muon spin relaxation ({mu}SR), and inelastic neutron scattering (INS) investigations on a polycrystalline sample of CeOs{sub 2}Al{sub 10} to investigate the nature of the phase transition observed near 29 K in the resistivity and heat capacity. Our {mu}SR data clearly reveal coherent frequency oscillations below 28 K, indicating the presence of an internal field at the muon site, which confirms the long-range magnetic ordering of the Ce moment below 28 K. Upon cooling the sample below 15 K, unusual behavior of the temperature-dependent {mu}SR frequencies may indicate either a change in the muon site, consistent with the observation of superstructure reflections in electron diffraction, or a change in the ordered magnetic structure. Neutron diffraction data do not reveal any clear sign of either magnetic Bragg peaks or superlattice reflections. Furthermore, INS measurements clearly reveal the presence of a sharp inelastic excitation near 11 meV between 5 and 26 K, due to opening of a gap in the spin-excitation spectrum, which transforms into a broad response at and above 30 K. The magnitude of the spin gap (11 meV) as derived from the INS peak position agrees very well with the gap value as estimated from the bulk properties.

Adroja, D. T.; Hillier, A. D.; Kockelmann, W. A.; Anand, V. K.; Stewart, J. R.; Taylor, J. [ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot Oxon OX11 0QX (United Kingdom); Deen, P. P. [Institute Laue-Langevin, BP 156, 6 Rue Jules Horowitz, 38042 Grenoble Cedex (France); Strydom, A. M. [Physics Department, University of Johannesburg, P.O. Box 524, Auckland Park 2006 (South Africa); Muro, Y.; Kajino, J.; Takabatake, T. [Department of Quantum Matter, ADSM, and IAMR, Hiroshima University, Higashi-Hiroshima 739-8530 (Japan)

2010-09-01T23:59:59.000Z

488

Performance of Ni/ScSZ cermet anode modified by coating with Gd{sub 0.2}Ce{sub 0.8}O{sub 2} for a SOFC  

SciTech Connect (OSTI)

A Ni/scandia-stabilized zirconia (ScSZ) cermet anode was modified by coating with nano-sized gadolinium-doped ceria (GDC, Gd{sub 0.2}Ce{sub 0.8}O{sub 2}) within the pores of the anode for a solid oxide fuel cell (SOFC). X-ray diffraction (XRD) and scanning electron microscopy (SEM) were employed in the anode characterizations. Open circuit voltages (OCVs) increased from 1.027 to 1.078 V, and the maximum power densities increased from 238 to 825 mW/cm{sup 2}, as the operating temperature of a SOFC with 2.0 wt.%GDC-coated Ni/ScSZ anode was increased from 700 to 850 deg. C in humidified hydrogen. The coating of nano-sized Gd{sub 0.2}Ce{sub 0.8}O{sub 2} particle within the pores of the porous Ni/ScSZ anode significantly improved the performance of anode supported cell. Electrochemical impedance spectra (EIS) illustrated that the cell with Ni/ScSZ anode exhibited far greater impedances than the cell with 2.0 wt.%GDC-coated Ni/ScSZ anode. Consequently, 2.0 wt.%GDC-coated Ni/ScSZ anode could be used as a novel anode material for a SOFC due to better electrochemical performance.

Huang Bo [Shanghai Institute of Ceramics, Chinese Academy of Sciences (SICCAS), 1295 Dingxi Road, Shanghai 200050 (China)]. E-mail: huangbo2k@hotmail.com; Ye, X.F. [Shanghai Institute of Ceramics, Chinese Academy of Sciences (SICCAS), 1295 Dingxi Road, Shanghai 200050 (China); Wang, S.R. [Shanghai Institute of Ceramics, Chinese Academy of Sciences (SICCAS), 1295 Dingxi Road, Shanghai 200050 (China); Nie, H.W. [Shanghai Institute of Ceramics, Chinese Academy of Sciences (SICCAS), 1295 Dingxi Road, Shanghai 200050 (China); Liu, R.Z. [Shanghai Institute of Ceramics, Chinese Academy of Sciences (SICCAS), 1295 Dingxi Road, Shanghai 200050 (China); Wen, T.L. [Shanghai Institute of Ceramics, Chinese Academy of Sciences (SICCAS), 1295 Dingxi Road, Shanghai 200050 (China)

2007-09-04T23:59:59.000Z

489

Combined effect of chemical pressure and valence electron concentration through the electron-deficient Li substitution on the RE{sub 4}LiGe{sub 4} (RE=La, Ce, Pr, and Sm) system  

SciTech Connect (OSTI)

Four members of the RE{sub 4}LiGe{sub 4} (RE=La, Ce, Pr, and Sm) system have been prepared by high-temperature reaction method and characterized by X-ray diffractions. All compounds crystallize in the orthorhombic Gd{sub 5}Si{sub 4}-type structure (space group Pnma, Pearson code oP16) with bonding interactions for interslab Ge{sub 2} dimers. The Li substitution for rare-earth elements in the RE{sub 4}LiGe{sub 4} system leads to a combined effect of the increased chemical pressure and the decreased valance electron concentration (VEC), which eventually results in the structure transformation from the Sm{sub 5}Ge{sub 4}-type with all broken interslab GeGe bond for the parental RE{sub 5}Ge{sub 4} to the Gd{sub 5}Si{sub 4}-type structure for the ternary RE{sub 4}LiGe{sub 4} (RE=La, Ce, Pr, and Sm) system. Site-preference between rare-earth metals and Li is proven to generate energetically the most favorable atomic arrangements according to coloring-problem, and the rationale is provided using both the size-factor and the electronic-factor related, respectively, to site-volume and electronegativity as well as QVAL values. Tight-binding, linear-muffin-tin-orbital (TB-LMTO) calculations are performed to investigate electronic densities of states (DOS) and crystal orbital Hamilton population (COHP) curves. The influence of reduced VEC for chemical bonding including the formation of interslab Ge{sub 2} dimers is also discussed. The magnetic property measurements prove that the non-magnetic Li substitution leads to the ferromagnetic (FM)-like ground state for Ce{sub 4}LiGe{sub 4} and the co-existence of antiferromagntic (AFM) and FM ground states for Sm{sub 4}LiGe{sub 4}. - Graphical abstract: Reported is a combined effect of the chemical pressure and the reduced VEC caused by the smaller monovalent non-magnetic Li substitution for the larger trivalent magnetic rare-earth metals in the RE{sub 4}LiGe{sub 4} (RE=La, Ce, Pr, and Sm) system. This results in the structure transformation from the Sm{sub 5}Ge{sub 4}-type to the Gd{sub 5}Si{sub 4}-type structure and the changes in magnetic properties. Display Omitted - Highlights: Four Li-containing intermetallic compounds RE{sub 4}LiGe{sub 4} (RE=La, Ce, Pr and Sm) were synthesized. The combined effect of the chemical pressure and the reduced VEC caused by Li substitution for a rare-earth metal results in the structure transformation. Electronic structures and magnetic properties of title compounds were thoroughly investigated.

Nam, Gnu; Jeon, Jieun; Kim, Youngjo [Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk 361-763 (Korea, Republic of); Kwon Kang, Sung [Department of Chemistry, Chungnam National University, Daejeon, Chungnam 305-764 (Korea, Republic of); Ahn, Kyunghan [Advanced Materials Research Center, Samsung Advanced Institute of Technology, Yongin-si, Gyeonggi-do 446-712 (Korea, Republic of); You, Tae-Soo, E-mail: tsyou@chungbuk.ac.kr [Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk 361-763 (Korea, Republic of)

2013-09-15T23:59:59.000Z

490

A comparative study of SrO and BaO doping to CeO{sub 2}-ZrO{sub 2}: Characteristic and its catalytic performance for three-way catalysts  

SciTech Connect (OSTI)

Graphical abstract: Display Omitted Highlights: ? The prepared materials have a face-centered cubic structure and nanosize particles. ?Comparing to CZB, aged CZS has 494 ?mol/g of OSC and 30 m{sup 2}/g of surface area. ? CZS and CZB have similar NO sorption and reductive properties and different H{sub 2} uptake. ? T{sub 50} of Pt-Rh/CZS/LA is as low as 199 C for CO, 228 C for NO, and 252 C for C{sub 3}H{sub 8}. ? Pt-Rh/CZS/LA has wider working-window at 320 C under different ? value. -- Abstract: Ceria-zirconia-strontia (Ce{sub 0.35}Zr{sub 0.55}Sr{sub 0.10}O{sub 1.9}) and ceria-zirconia-baria (Ce{sub 0.35}Zr{sub 0.55}Ba{sub 0.10}O{sub 1.9}) were synthesized using an oxidation-co-precipitation method with hydrogen peroxide (H{sub 2}O{sub 2}) as oxidant. The physical and chemical properties of the prepared materials were investigated using BrunauerEmmettTeller surface area characterization, transmission electron microscopy, X-ray diffraction, Raman spectra, X-ray photoelectron spectroscopy, and oxygen pulse reaction. The prepared materials were used in preparing three-way catalysts with low Pt and Rh content. Moreover, catalytic activities were evaluated at a fixed bed under a simulated gaseous mixture. The results are as follows: (1) the prepared materials have a face-centered cubic structure and are nano-sized; (2) aged Ce{sub 0.35}Zr{sub 0.55}Sr{sub 0.10}O{sub 1.9} has higher oxygen storage capacity (494 ?mol/g), better thermal stability (30 m{sup 2}/g), good low-temperature reducibility, and high hydrogen uptake after TPR-redox cycles; (3) the light-off temperature (T{sub 50}) of Pt-Rh/CZS/LA can be as low as 199 C for CO, 228 C for NO, and 252 C for C{sub 3}H{sub 8}; and (4) Pt-Rh/CZS/LA has a fairly wide working-window.

Guo, Jiaxiu, E-mail: guojiaxiu@scu.edu.cn [College of Architecture and Environment, Sichuan University, Chengdu 610065 (China) [College of Architecture and Environment, Sichuan University, Chengdu 610065 (China); National Engineering Research Center for Flue Gas Desulfurization, Chengdu 610065 (China); Shi, Zhonghua, E-mail: shizhonghua@scu.edu.cn [College of Chemistry, Sichuan University, Chengdu 610064 (China)] [College of Chemistry, Sichuan University, Chengdu 610064 (China); Wu, Dongdong [College of Chemistry, Sichuan University, Chengdu 610064 (China)] [College of Chemistry, Sichuan University, Chengdu 610064 (China); Yin, Huaqiang [College of Architecture and Environment, Sichuan University, Chengdu 610065 (China) [College of Architecture and Environment, Sichuan University, Chengdu 610065 (China); National Engineering Research Center for Flue Gas Desulfurization, Chengdu 610065 (China); Gong, Maochu [College of Chemistry, Sichuan University, Chengdu 610064 (China)] [College of Chemistry, Sichuan University, Chengdu 610064 (China); Chen, Yaoqiang [College of Chemistry, Sichuan University, Chengdu 610064 (China) [College of Chemistry, Sichuan University, Chengdu 610064 (China); National Engineering Research Center for Flue Gas Desulfurization, Chengdu 610065 (China)

2013-02-15T23:59:59.000Z

491

Data:Ccd78ce0-41e2-428c-a5a4-27f7cc54aea7 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onb5-dcc1fcffd1f2bb71-d4159a938742e80b26cc4 No revision has been930896adaac340c0b NoCcd78ce0-41e2-428c-a5a4-27f7cc54aea7

492

S T U D EN T A ND EN R OLM EN T S ER V I CE S DI V IS IO N In order to assist departments and colleges with their planning cycle for 2014-15 and beyond,  

E-Print Network [OSTI]

Page | 1 S T U D EN T A ND EN R OLM EN T S ER V I CE S DI V IS IO N In order to assist departments: Key Dates and Deadlin