Powered by Deep Web Technologies
Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

Homogeneous and Interfacial Catalysis in 3D Controlled Environment...  

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

Homogeneous and Interfacial Catalysis in 3D Controlled Environment FWPProject Description: Project Leader(s): Marek Pruski Principal Investigators: Andreja Bakac, Marek Pruski,...

2

Homogeneous Catalysis: Ultimate Selectivity  

Science Journals Connector (OSTI)

...explanation is that the economics are not good right now...aban-doned because of economics. Monsanto thinks the...significant by-product is methane, which may represent...syngas. Syngas made by steam reforming of natural gas con-tains...

THOMAS H. MAUGH II

1983-06-03T23:59:59.000Z

3

catalysis | EMSL  

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

catalysis catalysis Leads No leads are available at this time. Magnesium behavior and structural defects in Mg+ ion implanted silicon carbide. Abstract: As a candidate material for...

4

Homogeneous Catalysis in Supercritical Fluids  

Science Journals Connector (OSTI)

...structure similar to a [2Fe-2S]-type iron-sulfur center. Previ-ously predicted...11. The 2 binding site contains heme a3 iron and copper atoms (CUB) with an interatomic...is no detectable bridging ligand between iron and copper atoms in spite of a strong antifer-romagnetic...

Philip G. Jessop; Takao Ikariya; Ryoji Noyori

1995-08-25T23:59:59.000Z

5

EMSL - catalysis  

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

catalysis en Duets by molecules and plasmons http:www.emsl.pnl.govemslwebnewsduets-molecules-and-plasmons

6

Catalysis Workshop  

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

Opportunities in Catalysis Research Using Synchrotron Radiation Opportunities in Catalysis Research Using Synchrotron Radiation Stanford Synchrotron Radiation Laboratory October 8-9, 2002 Organizer: Anders Nilsson Chemical catalysis is one of the research areas of enormous importance for the industrial society. There are important challenges to be met in the near future where development of new processes and catalysts are a necessity. We need to find a way to make methanol from methane, split water into hydrogen using sunlight, find replacement of platinum metals, etc. The fundamental understanding of many catalytic processes is still emerging and there seems to be a new opportunity with the recent development in experimental and theoretical methods. The intention of workshop was to bring researchers from many different disciplines together to discuss how synchrotron radiation can be applied to address some fundamental questions in catalysis.

7

Ab initio calculations in heterogeneous and homogeneous catalysis: I. Methanol to gasoline with ZSM-5. II. Carbonyl ligand effects on metal-metal bonds  

SciTech Connect (OSTI)

This thesis is composed of two studies in catalysis. The first is an exploration, using computational techniques, of the mechanism for the first carbon-carbon bond formation in the methanol to gasoline (MTG) reaction. The second is a study of the factors important to the understanding of ligand effects on metal-metal bonds, and in particular, to metal clusters. Three possibilities were considered as ways to activate a carbon in the MTG process prior to formation of C2 or higher hydrocarbons. These were a free radical mechanism, a surface ylide mechanism, and a possible defect site which might lead to steric crowding of CH[sub 2] groups. Although the free radical mechanism was found to be thermodynamically within the parameters of the MTG process, it contained a high transition state. Consideration of the molecules available prior to hydrocarbon build-up and their specific electronic structure, led to the view that the available carbon atoms (methanol, dimethyl ether, etc.) were unlikely to be activated by a free radical intermediate. The surface-stabilized ylide which has been proposed as an intermediate by many was studied to determine if in fact the ylide was stabilized. The total energy of the ylide was compared to that of the naked site on the zeolite and free methylene. Free methylene ranged, depending on the geometry of the ylide, between 50 and 80 kcal more stable. These numbers are qualitatively correct, but more electron correlation would have to be incorporated in the calculation to get an accurate value for the destabilization. Starting from a defect site, two CH[sub 2] groups were each attached to two oxygen atoms. It was thought that two CH[sub 2] groups would take up considerably more space than either than original Al atom or the four hydrogens. Molecular Mechanics calculations showed the zeolite to be sufficiently flexible to prevent crowding of the CH[sub 2]'s.

Miller, A.E.

1993-01-01T23:59:59.000Z

8

INSTITUTE FOR INTEGRATED CATALYSIS Catalysis Research for  

E-Print Network [OSTI]

. This work includes catalysis for upgrading biomass feedstocks; for chemical energy storage, retrieval

9

Organotextile Catalysis  

Science Journals Connector (OSTI)

...1242196 Ji-Woong Lee Thomas Mayer-Gall Klaus Opwis Choong Eui Song Jochen Stefan Gutmann Benjamin List 1Max-Planck-Institut...Catalysis Ji-Woong Lee, Thomas Mayer-Gall, Klaus Opwis, Choong Eui Song, Jochen Stefan Gutmann, Benjamin List Materials/Methods...

Ji-Woong Lee; Thomas Mayer-Gall; Klaus Opwis; Choong Eui Song; Jochen Stefan Gutmann; Benjamin List

2013-09-13T23:59:59.000Z

10

Catalysis | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

Catalysis Catalysis Basic Energy Sciences Advisory Committee (BESAC) BESAC Home Meetings Meeting Presentations History Logistics Members Charges/Reports Charter .pdf file (41KB) BES Committees of Visitors BES Home Meetings Catalysis Print Text Size: A A A RSS Feeds FeedbackShare Page Tuesday, May 14, 2002 - Opening Plenary Session Catalysis and Nanoscience Activities in BES - William Millman Energy Generation, Carbon Mgmt., and Methodology - John Frost Nanoscience and Catalysis - D. Wayne Goodman Wednesday, May 15, 2002 - 2nd Day Plenary Session Heterogeneous Catalysis - J. K. Norskov Homogeneous and Single-Site Heterogeneous Catalysis - Tobin Marks Thursday, May 16, 2002 - Breakout Summary Reports Catalysts Design Driven by Fundamental Research - Barteau Linking Basic Research to Applications - Bare Bell

11

Relativistic effects in homogeneous gold catalysis  

Science Journals Connector (OSTI)

... Int. Edn 45, 2901–2904 (2006) Furstner, A. & Hannen, P. Carene terpenoids by gold-catalyzed cycloisomerization reactions. Chem. Commun. 2546–2547 (2004) Furstner, ...

David J. Gorin; F. Dean Toste

2007-03-22T23:59:59.000Z

12

Seventh BES (Basic Energy Sciences) catalysis and surface chemistry research conference  

SciTech Connect (OSTI)

Research programs on catalysis and surface chemistry are presented. A total of fifty-seven topics are included. Areas of research include heterogeneous catalysis; catalysis in hydrogenation, desulfurization, gasification, and redox reactions; studies of surface properties and surface active sites; catalyst supports; chemical activation, deactivation; selectivity, chemical preparation; molecular structure studies; sorption and dissociation. Individual projects are processed separately for the data bases. (CBS)

Not Available

1990-03-01T23:59:59.000Z

13

Enzyme catalysis Enzyme catalysis is the catalysis of chemical reactions by  

E-Print Network [OSTI]

Enzyme catalysis Enzyme catalysis is the catalysis of chemical reactions by specialized proteins known as enzymes. Catalysis of biochemical reactions in the cell is vital due to the very low reaction rates of the uncatalysed reactions. The mechanism of enzyme catalysis is similar in principle to other

Cavanagh, John

14

HETEROGENEOUS CATALYSIS RESEARCH MEETING  

E-Print Network [OSTI]

Williams) Transition~Metal Carbides Heterogeneous CatalysisActivity of Transition-Metal Carbides Wendell S. Williamsand testing of transition-metal carbide electrodes for

Authors, Various

2011-01-01T23:59:59.000Z

15

Feasibility study of a 6V-92TA homogeneous auto-ignited two-stroke (HAT) compressed-natural-gas-engine. Topical report, August 1989-May 1990  

SciTech Connect (OSTI)

The objective of the project was to modify a two-stroke 6V-92TA diesel engine to operate on natural gas using a simple system with gas addition to the compressor inlet and a spark plug for cold start and non-autoignition engine operation. The engine was to be operated at most speed-load conditions by autoignition of the premixed gas-air mixture. This concept is referred to as the Homogeneous Auto-Ignited Two-Stroke (HAT). Autoignition of carbureted natural gas was achieved at various loads and speeds in a 6V-92TA engine modified for operating on natural gas with the HAT concept. However, HAT engine operation up to 277 hp at 2100 rpm (diesel coach rating) was not achieved because early ignition in some cylinders caused knock and excessive heat transfer. Instead, the engine was operated up to 226 hp (767 N.m) at 2100 rpm, 181 hp (780 N.m) at 1650 rpm, 130 hp (773 N.m) at 1200 rpm, and 34 hp (368 N.m) at 650 rpm. Maximum brake thermal efficiency measured was 33.4% at 2100 rpm/219 hp. The corrected efficiency (to compensate for the unburned natural gas lost during the scavenging process) was higher than this. Steady-state emissions show very low NOx, total unburned HC lower than expected and reasonable CO levels. The lean air-fuel mixture and unburned exhaust gases in the cylinder resulted in very low NOx emissions.

Kakwani, R.M.; Winsor, R.E.

1990-08-01T23:59:59.000Z

16

EMSL - In situ catalysis  

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

situ-catalysis en Local environment and composition of magnesium gallium layered double hydroxides determined from solid-state 1H and 71Ga NMR http:www.emsl.pnl.govemslweb...

17

Fundamental Catalysis Research in Japan  

Science Journals Connector (OSTI)

Fundamental Catalysis Research in Japan ... Japan is one of the foremost nations in catalysis research. ... Dr. Horiuti responded with information on what he and other Japanese research workers were doing, and subsequently I decided to visit Japan to study catalysis during my sabbatical leave from New York University last spring. ...

JOHN HAPPEL

1966-05-30T23:59:59.000Z

18

Energy Programs | Catalysis  

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

Catalysis Catalysis Driving Toward Alternative Fuels Page 1 of 2 About 85 percent of the nation's energy needs are met by the combustion of fossil fuels such as oil, natural gas, and coal - finite resources that make the United States dependent upon other countries while polluting the environment through carbon emissions. In order to achieve energy security in an environmentally friendly manner, the nation's energy strategy must include alternative technologies based on renewable sources such as biofuels, solar, wind, and nuclear power. A central challenge, however, is the development of new processes and materials capable of tapping these sources and feeding the country's vast energy needs. A key part of the solution involves catalysis, the process of speeding up and

19

Fuel Cell Technologies Office: Catalysis Working Group  

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

Catalysis Working Catalysis Working Group to someone by E-mail Share Fuel Cell Technologies Office: Catalysis Working Group on Facebook Tweet about Fuel Cell Technologies Office: Catalysis Working Group on Twitter Bookmark Fuel Cell Technologies Office: Catalysis Working Group on Google Bookmark Fuel Cell Technologies Office: Catalysis Working Group on Delicious Rank Fuel Cell Technologies Office: Catalysis Working Group on Digg Find More places to share Fuel Cell Technologies Office: Catalysis Working Group on AddThis.com... Key Activities Plans, Implementation, & Results Accomplishments Organization Chart & Contacts Quick Links Hydrogen Production Hydrogen Delivery Hydrogen Storage Fuel Cells Technology Validation Manufacturing Codes & Standards Education Systems Analysis

20

Polyisobutylene as a Polymer Support for Homogeneous Catalysis  

E-Print Network [OSTI]

to one (-OCH 3 , -OH termini) or two (two -OH termini) equivalents of ligand or catalyst per mole of polymer. Linkers as shown in eq. 2 are not required but are sometimes used. MeO O OH n O or HO O OH nanioic polymerization MeO O OH n HO O OH n Me... and the SPhos Pd catalyst had a TOF that was 20-fold larger than that of a similar ligated Pd catalyst on SiO 2 . O(CH 22 O) P(Cy) 2 OMe MeO (Cy) 2 P 9 HO PH(Cy) 2 h 70 o C, 12 h l - Cs 2 O 3 , H 3 CN Ms(CH 22 O) n Ms n Cl N H O + 2 mol% Pd(OAc) 2...

Hongfa, Chayanant

2010-01-14T23:59:59.000Z

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

Phase selectively soluble polymer supports to facilitate homogeneous catalysis  

E-Print Network [OSTI]

Soluble polymers that have phase selective solubility are useful in synthesis because they simplify purification and separation. Such selectively soluble polymers simplify catalyst, reagent, and product recovery and enable the use of Green chemistry...

Ortiz-Acosta, Denisse

2009-05-15T23:59:59.000Z

22

Fundamental studies of reactive intermediates in homogeneous catalysis  

SciTech Connect (OSTI)

The studies involve dissociation of Fe(CO){sub n}{sup {minus}}, Ni(CO){sub n}{sub {minus}}, and other carbonyl anions; decarboxylation of (CO){sub 4}FeCOOH{sup {minus}} to form CO{sub 2} and (CO){sub 4}FeH{sup {minus}} in the water gas shift reaction; gas-phase bimolecular reactions of carbonyl anions and O{sub 2}; reaction of O{sub 2} with CpMn(CO){sub 2}{sup {minus}}; gas-phase chemistry of fullerene anions; and gas-phase thermochemistry of bicarbonate ion, bisulfite ion, and their conjugate acids (sulfonate ion was produced).

Not Available

1993-10-01T23:59:59.000Z

23

DOE Catalysis Working Group Meeting  

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

PEMFC Performance and Durability - Jim Waldecker (Ford) 9:45 - 10:00 Degradation of Nanoparticle Pt alloy and De-alloyed Pt Catalysts - Debbie Myers (ANL) Catalysis Working Group...

24

Molecular ingredients of heterogeneous catalysis  

SciTech Connect (OSTI)

The purpose of this paper is to present a review and status report to those in theoretical chemistry of the rapidly developing surface science of heterogeneous catalysis. The art of catalysis is developing into science. This profound change provides one with opportunities not only to understand the molecular ingredients of important catalytic systems but also to develop new and improved catalyst. The participation of theorists to find answers to important questions is sorely needed for the sound development of the field. It is the authors hope that some of the outstanding problems of heterogeneous catalysis that are identified in this paper will be investigated. For this purpose the paper is divided into several sections. The brief Introduction to the methodology and recent results of the surface science of heterogeneous catalysis is followed by a review of the concepts of heterogeneous catalysis. Then, the experimental results that identified the three molecular ingredients of catalysis, structure, carbonaceous deposit and the oxidation state of surface atoms are described. Each section is closed with a summary and a list of problems that require theoretical and experimental scrutiny. Finally attempts to build new catalyst systems and the theoretical and experimental problems that appeared in the course of this research are described.

Somorjai, G.A.

1982-06-01T23:59:59.000Z

25

Argonne Chemical Sciences & Engineering - People - Catalysis and Energy  

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

Management and Support Management and Support Heterogeneous Catalysis Homogeneous Catalysis Fuel Cell Engineering Hydrogen and Fuel Cell Materials Ceramic Electrochemistry Electrochemical Projects Support Management and Support Theodore R. Krause, Chemical Engineer and Department Manager phone: 630/252-4356, fax: 630/972-4463, e-mail: krauset@anl.gov PhD, Chemical Engineering, University of Delaware Catalyst formulations and characterization Reaction kinetics Catalyst fundamentals Hydrogen production technologies Laurie A. Carbaugh, Administrative Secretary phone: 630/252-7556, fax: 630/252-9917, e-mail: laurie.carbaugh@anl.gov Romesh Kumar, Senior Chemical Engineer phone: 630/252-4342, fax: 630/252-4176, e-mail: kumar@anl.gov PhD, Chemical Engineering, University of California, Berkeley

26

Magnetic catalysis in flavored ABJM  

E-Print Network [OSTI]

We study the magnetic catalysis of chiral symmetry breaking in the ABJM Chern-Simons matter theory with unquenched flavors in the Veneziano limit. We consider a magnetized D6-brane probe in the background of a flavored black hole which includes the backreaction of massless smeared flavors in the ABJM geometry. We find a holographic realization for the running of the quark mass due to the dynamical flavors. We compute several thermodynamic quantities of the brane probe and analyze the effects of the dynamical quarks on the fundamental condensate and on the phase diagram of the model. The dynamical flavors have an interesting effect on the magnetic catalysis. At zero temperature and fixed magnetic field, the magnetic catalysis is suppressed for small bare quark masses whereas it is enhanced for large values of the mass. When the temperature is non-zero there is a critical magnetic field, above which the magnetic catalysis takes place. This critical magnetic field decreases with the number of flavors, which we interpret as an enhancement of the catalysis.

Niko Jokela; Alfonso V. Ramallo; Dimitrios Zoakos

2013-11-25T23:59:59.000Z

27

Bridge to Fuel Cell Molecular Catalysis: 3D Non-Platinum Group Metal  

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

Bridge to Fuel Cell Molecular Catalysis: 3D Non-Platinum Group Metal Bridge to Fuel Cell Molecular Catalysis: 3D Non-Platinum Group Metal Catalyst in MEAs Title Bridge to Fuel Cell Molecular Catalysis: 3D Non-Platinum Group Metal Catalyst in MEAs Publication Type Journal Article Year of Publication 2012 Authors Zhu, Xiaobing, John B. Kerr, Qinggang He, Gi Suk Hwang, Zulima Martin, Kyle Clark, Adam Z. Weber, and Nana Zhao Journal ECS Transactions Volume 45 Issue 2 Pagination 143 - 152 Date Published 04/2012 ISSN 1938-6737 Abstract Transition metal porphyrin complexes have been mounted in a three dimensional homogenous distribution inside the ionomer of catalyst layers in MEAs to achieve competitive fuel cell catalysis activity. The effect of electrode components including ionomer, carbon, catalyst, and mediator, and ionomer film thickness, is investigated in fuel cell molecular catalysis system. Membrane electrode assembly (MEA) durability testing has been conducted. SEM and TEM techniques are employed to investigate molecular catalysis electrode micro- and nano- structure and morphology. To date, surprisingly, the best fuel cell performance, i.e. 1280 mA/cm2 of maximum/short-circuit current density is achieved, approaching that of Pt-based electrode, indicating higher turnover frequencies than Pt although with poorer voltages.

28

Topics for letter "c" | EMSL  

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

capability groups capital investments carbon carbon cycle carbon cycling carbon dioxide carbon sequestration Cascade catalysis catalysis industry catalyst catalyst beds catalyst...

29

SOUTHWEST CATALYSIS SOCIETY 2008 SPRING SYMPOSIUM  

E-Print Network [OSTI]

Design: FCC Feed Hydrotreating Catalysis 11:35 AM Lunch Break/Poster Preview 1:00 PM Zachary T. Ball

Natelson, Douglas

30

Publications @ Catalysis: Reactivity and Structure Group | Chemistry  

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

List of Publications since 2010 List of Publications since 2010 2013 "Unique properties of ceria nanoparticles supported on metals: Novel inverse ceria/copper catalysts for CO oxidation and the water-gas shift reaction" Senanayake, S.D., Stacchiola, D., and Rodriguez, J.A. Accounts of Chemical Research, 2013. 46(8): p. 1702-1711. "Characterization of metal-oxide catalysts in operando conditions by combining x-ray absorption and raman spectroscopies in the same experiment" Patlolla, A., Baumann, P., Xu, W., Senanayake, S.D., Rodriguez, J.A., and Frenkel, A.I. Topics in Catalysis, 2013. 56(11): p. 896-904. "In situ time-resolved x-ray diffraction study of the synthesis of Mo2C with different carburization agents" Guzman, H.J., Xu, W.Q., Stacchiola, D., Vitale, G., Scott, C.E., Rodriguez, J.A., and Pereira-Almao, P. Canadian Journal of Chemistry-Revue Canadienne De Chimie, 2013. 91(7): p. 573-582.

31

Transmural Catalysis - High Efficiency Catalyst Systems for NOx...  

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

Transmural Catalysis - High Efficiency Catalyst Systems for NOx Adsorbers and SCR Transmural Catalysis - High Efficiency Catalyst Systems for NOx Adsorbers and SCR Presentation...

32

Thermochemical Conversion: Using Heat and Catalysis to Make Biofuels...  

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

Thermochemical Conversion: Using Heat and Catalysis to Make Biofuels and Bioproducts Thermochemical Conversion: Using Heat and Catalysis to Make Biofuels and Bioproducts The...

33

Bimetallic and Ternary Alloys for Improved Oxygen Reduction Catalysis...  

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

Bimetallic and Ternary Alloys for Improved Oxygen Reduction Catalysis . Bimetallic and Ternary Alloys for Improved Oxygen Reduction Catalysis . Abstract: The research described in...

34

BERKELEY CATALYSIS CENTER Monday October 13  

E-Print Network [OSTI]

of an industrial catalyst shaped by extrusion with alumina. The catalytic assessment took place with two reactionsBERKELEY CATALYSIS CENTER Seminar Monday October 13 The McCollum Room 775 Tan Hall 9:00 am Dr. Jean parrafinic feedstocks. It also illustrates the type of cooperation between industrial and academic catalysis

Iglesia, Enrique

35

"Nanocrystal bilayer for tandem catalysis"  

SciTech Connect (OSTI)

Supported catalysts are widely used in industry and can be optimized by tuning the composition and interface of the metal nanoparticles and oxide supports. Rational design of metal-metal oxide interfaces in nanostructured catalysts is critical to achieve better reaction activities and selectivities. We introduce here a new class of nanocrystal tandem catalysts that have multiple metal-metal oxide interfaces for the catalysis of sequential reactions. We utilized a nanocrystal bilayer structure formed by assembling platinum and cerium oxide nanocube monolayers of less than 10 nm on a silica substrate. The two distinct metal-metal oxide interfaces, CeO2-Pt and Pt-SiO2, can be used to catalyse two distinct sequential reactions. The CeO2-Pt interface catalysed methanol decomposition to produce CO and H2, which were subsequently used for ethylene hydroformylation catalysed by the nearby Pt-SiO2 interface. Consequently, propanal was produced selectively from methanol and ethylene on the nanocrystal bilayer tandem catalyst. This new concept of nanocrystal tandem catalysis represents a powerful approach towards designing high-performance, multifunctional nanostructured catalysts

Yamada, Yusuke; Tsung, Chia Kuang; Huang, Wenyu; Huo, Ziyang; E.Habas, Susan E; Soejima, Tetsuro; Aliaga, Cesar E; Samorjai, Gabor A; Yang, Peidong

2011-01-24T23:59:59.000Z

36

Magnetic Catalysis vs Magnetic Inhibition  

E-Print Network [OSTI]

We discuss the fate of chiral symmetry in an extremely strong magnetic field B. We investigate not only quark fluctuations but also neutral meson effects. The former would enhance the chiral-symmetry breaking at finite B according to the Magnetic Catalysis, while the latter would suppress the chiral condensate once B exceeds the scale of the hadron structure. Using a chiral model we demonstrate how neutral mesons are subject to the dimensional reduction and the low dimensionality favors the chiral-symmetric phase. We point out that this effect, the Magnetic Inhibition, can be a feasible explanation for recent lattice-QCD data indicating the decreasing behavior of the chiral-restoration temperature with increasing B.

Kenji Fukushima; Yoshimasa Hidaka

2012-09-06T23:59:59.000Z

37

Phase-Transfer Catalysis: Industrial Perspective  

Science Journals Connector (OSTI)

In the early 1990s, it was estimated that approximately 500 commercial phase-transfer catalysis (PTC) processes were being performed using at least 25 million pounds per year of catalyst. It was also estimated...

Charles M. Starks; Charles L. Liotta; Marc E. Halpern

1994-01-01T23:59:59.000Z

38

Basic Concepts in Phase-Transfer Catalysis  

Science Journals Connector (OSTI)

Phase-transfer catalysis (PTC) is a powerful tool in many areas of chemistry. It is a technique for conducting reactions between two or more reagents in two or more phases, when reaction is inhibited because t...

Charles M. Starks; Charles L. Liotta; Marc E. Halpern

1994-01-01T23:59:59.000Z

39

Catalysis Working Group Meeting: June 2014  

Broader source: Energy.gov [DOE]

Agenda and presentations from the Catalysis Working Group held on June 16, 2014, in Washington, D.C., in conjunction with the DOE Hydrogen and Fuel Cells Program Annual Merit Review and Peer Evaluation Meeting.

40

Single-molecule kinetics of nanoparticle catalysis  

Science Journals Connector (OSTI)

Owing to their structural dispersion, the catalytic properties of nanoparticles are challenging to characterize in ensemble-averaged measurements. The single-molecule approach enables studying the catalysis of na...

Weilin Xu; Hao Shen; Guokun Liu; Peng Chen

2009-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

Synthesis of Biodiesel via Acid Catalysis  

Science Journals Connector (OSTI)

Synthesis of Biodiesel via Acid Catalysis ... Biodiesel is synthesized via the transesterification of lipid feedstocks with low molecular weight alcohols. ... Nonetheless, acid-catalyzed processes could produce biodiesel from low-cost feedstocks, lowering production costs. ...

Edgar Lotero; Yijun Liu; Dora E. Lopez; Kaewta Suwannakarn; David A. Bruce; James G. Goodwin, Jr.

2005-01-25T23:59:59.000Z

42

Molecularly engineering homogenous catalysts  

E-Print Network [OSTI]

have developed new strategies for homogeneous catalyst recovery. Poly (N-isopropylacrylamide) and poly (N-octadecylacrylamide) supports, for example, yield recoverable catalysts that are selectively soluble in the lower (polar) phase and the upper (non...

Hughes, Reagan Rebekah

2013-02-22T23:59:59.000Z

43

Advanced Resources for Catalysis Science; Recommendations for a National Catalysis Research Institute  

SciTech Connect (OSTI)

Catalysis is one of the most valuable contributors to our economy and historically an area where the United States has enjoyed, but is now losing, international leadership. While other countries are stepping up their work in this area, support for advanced catalysis research and development in the U.S. has diminished. Yet, more than ever, innovative and improved catalyst technologies are imperative for new energy production processes to ease our dependence on imported resources, for new energy-efficient and environmentally benign chemical production processes, and for new emission reduction technologies to minimize the environmental impact of an active and growing economy. Addressing growing concerns about the future direction of U.S. catalysis science, experts from the catalysis community met at a workshop to determine and recommend advanced resources needed to address the grand challenges for catalysis research and development. The workshop's primary conclusion: To recapture our position as the leader in catalysis innovation and practice, and promote crucial breakthroughs, the U.S. must establish one or more well-funded and well-equipped National Catalysis Research Institutes competitively selected, centered in the national laboratories and, by charter, networked to other national laboratories, universities, and industry. The Institute(s) will be the center of a national collaboratory that gives catalysis researchers access to the most advanced techniques available in the scientific enterprise. The importance of catalysis to our energy, economic, and environmental security cannot be overemphasized. Catalysis is a vital part of our core industrial infrastructure, as it is integral to chemical processing and petroleum refining, and is critical to proposed advances needed to secure a sustainable energy future. Advances in catalysis could reduce our need for foreign oil by making better use of domestic carbon resources, for example, allowing cost-effective and zero emission conversion of coal into transportation fuels. No matter what energy sources are being considered (oil, natural gas, coal, biomass, solar, or nuclear based), a clean, sustainable energy future will involve catalysis to improve energy efficiency and storage and use options, and to mitigate environmental impacts. Recent revolutionary advances in nanotechnology and high-performance computing are enabling the breakthroughs in catalysis science and technology essential for a secure energy future. Thus, the time is right for substantially increased investments in catalysis science and technology.

Peden, Charles HF.; Ray, Douglas

2005-10-05T23:59:59.000Z

44

Catalysis Working Group Kick-Off Meeting Agenda  

Office of Environmental Management (EM)

1 Catalysis Working Group 2012 Hydrogen and Fuel Cells Program Annual Merit Review and Peer Evaluation Meeting Arlington, VA - May 14, 2012 Catalysis Working Group Kick-off Meeting...

45

Fuel Cell Technologies Office: Catalysis Working Group  

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

Catalysis Working Group Catalysis Working Group The Catalysis Working Group (CWG) meets twice per year to exchange information, create synergies, and collaboratively develop both an understanding of and tools for studying electrocatalysis for polymer electrolyte fuel cells (PEFCs) and other low- and intermediate-temperature fuel cell systems, including direct methanol fuel cells (DMFCs), alkaline fuel cells (AFCs), alkaline membrane fuel cells (AMFCs), and phosphoric acid fuel cells (PAFCs). The CWG members include principal and co-principal investigators in electrocatalysis projects funded by the U.S. Department of Energy (DOE), as well as supporting DOE personnel. More information on DOE electrocatalysis activities can be found in the Multi-Year Research, Development, and Demonstration Plan.

46

Opportunities in Catalysis Research Using Synchrotron Radiation  

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

in Catalysis Research Using Synchrotron Radiation in Catalysis Research Using Synchrotron Radiation Tuesday 10/8/02 Chair: Lars Pettersson 1:30-1:40 Anders Nilsson Welcome 1:40-2:30 Gabor Somorjai University of California, Berkeley and LBLN Need for New Directions of Research at the Frontiers of Catalysis Science 2:30-3:00 Geoff Thornton University of Manchester Influence of defects on the reactivity of ZnO 3:00-3:30 Anders Nilsson Stanford Synchrotron Radiation Laboratory Soft X-ray Spectroscopy of Surfaces and Reactions 3:30-3:45 Break Chair: Anders Nilsson 3:45-4:15 Lars Pettersson Stockholm University Adsorbate-Substrate Bonding: An Experimental and Theoretical MO Picture 4:15-4:45 Miquel Salmeron Lawrence Berkeley National Laboratory Photoelectron Spectroscopy studies of surfaces in high pressure gas

47

Catalysis: Reactivity and Structure Group | Chemistry Department |  

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

Group Members Group Members Principal Investigators Jose Rodriguez Catalysis and surface science. Interaction and reaction of molecules with surfaces of metals, oxides, sulfides and carbides. Use of synchrotron-based techniques in surface and materials characterization (core and valence photoemission, x-ray absorption spectroscopy, x-ray diffraction). Modeling of surface reactions. Ping Liu Theoretical description of nanostructures, supported nanostructures, surfaces and their catalytic applications in heterogeneous catalysis and electrocatalysis. Density functional calculations, kinetic modeling and sensitivity analysis are employed to obtain a fundamental understanding of catalytic processes Dario Stacchiola Nano-Catalysis, Model mixed metal oxides, In-situ catalytic reactions at ambient pressures (AP). (Synchrotron PES, AP-XPS, AP-STM, AP-IRRAS, Inverse Catalyst, Nanoparticles, Graphene)

48

HOT TOPIC: Nanotechnology lecture  

Science Journals Connector (OSTI)

...Check-Bits HOT TOPIC: Nanotechnology lecture TOP SITE www.ukonlineforbusiness...proper handling. HOT TOPIC Nanotechnology lecture FUTURESHOCK Cyborgs...Cheltenham and Gloucester Branch. Nanotechnology Devices Defying Nature is taking......

HOT TOPIC: Nanotechnology lecture

2003-11-01T23:59:59.000Z

49

Cryogenic homogenization of biological tissues  

Science Journals Connector (OSTI)

Cryogenic homogenization of biological tissues ... Thermal (roasting and heating in a microwave oven), mechanical (milling and cryogenic grinding), and enzymatic ... ...

Rolf Zeisler; John K. Langland; Sally H. Harrison

1983-12-01T23:59:59.000Z

50

ISHHC XIII International Symposium on the Relations between Homogeneous and Heterogeneous Catalysis  

E-Print Network [OSTI]

Catalytic Processes for Sustainable Biomass Con- version”Catalytic Processes for Sustainable Biomass Conversion Istv´Catalyses for New Sustainable Green Processes on Catalyst

Somorjai Ed., G.A.

2007-01-01T23:59:59.000Z

51

ISHHC XIII International Symposium on the Relations between Homogeneous and Heterogeneous Catalysis  

E-Print Network [OSTI]

metal composites, nonmetal catalysts such as refractory compounds (borides, carbides,metal-coordination); H 2 -aided deoxygenation giving water plus a surface carbide (

Somorjai Ed., G.A.

2007-01-01T23:59:59.000Z

52

Investigation on application of homogeneous and heterogeneous catalysis for alkaline waste treatment  

SciTech Connect (OSTI)

The stabilization of neptunium(IV) in alkaline solution by chemical reductants under various conditions was studied. Testing showed that neptunium(V) is slowly reduced to Np(IV) by V(IV) at room temperature in alkaline solutions. Increasing temperature accelerates reduction. Complete reduction of 2 x 10{sup -4} M Np(V) occurs in three hours at 80{degrees}C in 1 M NaOH with 0.02 M VOSO{sub 4-}. Under similar conditions, but in 5 M NaOH, only 15 to 20% of the Np(V) was reduced in 5 hours. In all cases, about 98 % of the initial neptunium was found in the precipitate. Thus V(IV) acts both as a reductant and as a precipitation carrier. Tests showed Np(V) reduction by hydrazine hydrate could be catalyzed by Pd(II). Reduction increased with temperature and catalyst concentration and decreased with hydroxide concentration. Reduction of Np(V) also takes place in 1 M NaOH solutions containing 1 M sodium formate and palladium. Increasing temperature accelerates reduction; with three hours` treatment in 5 M NaOH solution at 90{degrees}C, about 95 % of the initial 2 x 10{sup -4} M neptunium(V) is transformed to Np(IV). Organic complexants and organic acid anions hinder the decontamination of alkaline solutions from neptunium and plutonium by coprecipitation with d-element hydroxides (the Method of Appearing Reagents). It was found that ethylenediaminetetraacetate (EDTA) and N-(2-hydroxyethyl) ethylenediaminetriacetate (HEDTA) are decomposed by H{sub 2}O{sub 2} in alkaline solution in the presence of cobalt compounds with heating and by Na2S208 at moderate temperatures. Citrate, glycolate, and oxalate are decomposed by Na{sub 2}S{sub 2}O{sub 8} with heating. Oxidant amounts must be increased when NaNO{sub 2} also is present in solution. 8 refs., 25 figs., 16 tabs.

Shilov, V.P.; Bessonov, A.A.; Garnov, A.Y.; Gelis, A.V. [Russian Academy of Sciences, Moscow (Russian Federation). Institute of Physical Chemistry] [and others

1997-09-01T23:59:59.000Z

53

ISHHC XIII International Symposium on the Relations between Homogeneous and Heterogeneous Catalysis  

E-Print Network [OSTI]

o P-159 Carbon Dioxide Hydrogenation for Methanol Synthesis:Carbon dioxide activation mechanisms for low temperature partial hydrogenation to methanol

Somorjai Ed., G.A.

2007-01-01T23:59:59.000Z

54

The Development and Application of Homogeneous and Heterogeneous Late Metal Complexes in Catalysis  

E-Print Network [OSTI]

optimization of any process can be done in significantly less time and with less effort than with a batch reactor.

Witham, Cole

2010-01-01T23:59:59.000Z

55

ISHHC XIII International Symposium on the Relations between Homogeneous and Heterogeneous Catalysis  

E-Print Network [OSTI]

producing results that in- dicate that iron loaded zeolite exhibits a strong ability to convert methanol

Somorjai Ed., G.A.

2007-01-01T23:59:59.000Z

56

Nanoscale Advances in Catalysis and Energy Applications  

SciTech Connect (OSTI)

In this perspective, we present an overview of nanoscience applications in catalysis, energy conversion, and energy conservation technologies. We discuss how novel physical and chemical properties of nanomaterials can be applied and engineered to meet the advanced material requirements in the new generation of chemical and energy conversion devices. We highlight some of the latest advances in these nanotechnologies and provide an outlook at the major challenges for further developments.

Li, Yimin; Somorjai, Gabor A.

2010-05-12T23:59:59.000Z

57

Theoretical/Computational Tools for Energy-Relevant Catalysis...  

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

Tools for Energy-Relevant Catalysis FWPProject Description: Project Leader(s): James Evans, Mark Gordon Principal Investigators: James Evans, Mark Gordon This project...

58

Catalysis by Design - Theoretical and Experimental Studies of...  

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

Design - Theoretical and Experimental Studies of Model Catalysts for Lean NOx Treatment Catalysis by Design - Theoretical and Experimental Studies of Model Catalysts for Lean NOx...

59

Catalysis by Design: Bridging the Gap between Theory and Experiments...  

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

between Theory and Experiments Catalysis by Design: Bridging the Gap between Theory and Experiments Poster presentation at the 2007 Diesel Engine-Efficiency & Emissions Research...

60

Center for Biological Electron Transfer and Catalysis (BETCy...  

Office of Science (SC) Website

Center for Biological Electron Transfer and Catalysis (BETCy) Energy Frontier Research Centers (EFRCs) EFRCs Home Centers EFRC External Websites Research Science Highlights News &...

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

"Seeing" hydrogen atoms to unveil enzyme catalysis | ornl.gov  

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

"Seeing" hydrogen atoms to unveil enzyme catalysis Image shows nuclear density maps in the active site of DHFR where the catalytic group Asp27 and substrate folate have...

62

University of Delaware | Catalysis Center for Energy Innovation...  

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

Modeling Activity map produced from the new high-throughput computational engine. Example for ethylene glycol catalysis. Reforming, hydrodeoxygenation, dehydrogenation, and...

63

Topical Committee | Department of Energy  

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

Topical Committee Topical Committee In the interest of optimum technology transfer, the DOE Technical Standards Program (TSP) has set up a network of topical committees. These...

64

Tribal Topic Group Summary  

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

Caucus created a mission statement and resolution: - All Tribes with cultural ties to Yucca Mountain should be invited to join TEC - Ongoing funds to support Tribal Topic Group...

65

Neutrons for Catalysis: A Workshop on Neutron Scattering Techniques for Studies in Catalysis  

E-Print Network [OSTI]

-EM Fischer Tropsch Catalysis on Fe- or Co-catalysts, ,,CTL" Coal to Liquids ­ ,a rough (?) analogy #12;Peter Albers, AQ-EM Carbonaceous Deposits on Catalysts #12;Peter Albers, AQ-EM IINS on Coked Catalysts from Industrial Plants High-temperature and low-temperature cokes deposited on catalysts during

Pennycook, Steve

66

Topic Group Participants  

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

Topic Group Report Topic Group Report Presented to: Transportation External Coordination Working Group April 5, 2005 Phoenix, Arizona Recent 180(c) Topic Group Activities Issue Papers 1. Funding Distribution Method 2. Allowable Activities 3. Definitions 4. Pass-Through Requirements 5. Contingency Plans 6. 180(c) Policy or Rulemaking 7. Timing and Eligibility* 8. Funding for Related Activities* 9. State Fees* 10. Funding Allocation Approach* 180(c) Policy & Procedures * Executive Summary * Draft Policy & Procedures * Draft Grant Application Pckg * Appendix *Papers 7-10 still under discussion Today's Discussion Items * Reviewed Topic Group member comments on a variety of issues * Key issues included: - Funding allocation and timing of grants - Planning grants - State fees/matching requirements - Related non-training activities

67

Catalysis Science | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

Catalysis Science Catalysis Science Chemical Sciences, Geosciences, & Biosciences (CSGB) Division CSGB Home About Research Areas Energy Frontier Research Centers (EFRCs) DOE Energy Innovation Hubs Scientific Highlights Reports & Activities Principal Investigators' Meetings BES Home Research Areas Catalysis Science Print Text Size: A A A RSS Feeds FeedbackShare Page This research area develops the fundamental scientific principles enabling rational catalyst design and chemical transformation control. Research includes the identification of the elementary steps of catalytic reaction mechanisms and their kinetics; construction of catalytic sites at the atomic level; synthesis of ligands, metal clusters, and bio-inspired reaction centers designed to tune molecular-level catalytic activity and

68

Experimental evidence of foam homogenization  

SciTech Connect (OSTI)

The propagation of an ionization wave through a subcritical foam is studied under inertial confinement fusion conditions. Independent measurements of the ionization wave velocity are compared with hydrodynamic simulations and analytical models. It is shown that simulations of a homogeneous material at equivalent density strongly overestimate the front velocity. The internal foam structure can be accounted for with a simple model of foam homogenization that allows improving agreement between experiment and calculations.

Nicolaie, Ph.; Olazabal-Loume, M.; Tikhonchuk, V. [Univ. Bordeaux-CNRS-CEA, CELIA F-33405 Talence cedex (France); Fujioka, S.; Sunahara, A. [Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita Osaka 565-0871 (Japan); Borisenko, N.; Gus'kov, S.; Orekov, A. [P. N. Lebedev Physical Institute, RAS Leninskii Prospect 53, Moscow 119991 (Russian Federation); Grech, M. [Max-Planck-Institute for the Physics of Complex Systems, D-01187 Dresden (Germany); Riazuelo, G. [CEA, DAM, DIF, F-91297 Arpajon (France); Labaune, C. [Laboratoire pour l'Utilisation des Lasers Intenses, Ecole Polytechnique, Palaiseau (France); Velechowski, J. [Czech Technical University in Prague, Technicka 2, 166 27 Prague 6 (Czech Republic); Univ. Bordeaux-CNRS-CEA, CELIA F-33405 Talence cedex (France)

2012-11-15T23:59:59.000Z

69

Instrumentation @ Catalysis: Reactivity and Structure Group | Chemistry  

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

Instrumentation Instrumentation The Catalysis Group at BNL is leading research initiatives into the development of new tools and techniques that focus on the characterization of heterogeneous catalytic reactions and catalysts using imaging, spectroscopy and scattering techniques and integrated combinations of them under reaction conditions to unravel the morphology, chemical and structural properties, of catalysts, respectively. These efforts revolve around the use of synchrotron radiation (NSLS), electrons (CFN) and quantum tunneling tools with particular thrusts into imaging, spectroscopy and scattering. Groups Instrumentation(BNL) Three UHV chambers with diverse instrumentation for surface characterization: LEED, UPS, XPS, AES, TPD, ISS, PM-AP-IRRAS, Reactivity Cell. All the systems include ancillary instrumentation such as sputtering guns and metal evaporators. The IRRAS system was retrofitted with an ambient pressure (AP) cell on top of the UHV system. The sample can be prepared and characterized in UHV and then transfer in vacuum to the AP cell.

70

Shining Light on Catalysis | Stanford Synchrotron Radiation Lightsource  

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

Shining Light on Catalysis Shining Light on Catalysis Tuesday, July 19, 2011 - 4:38pm SSRL Conference Room 137-322 Jeroen A. van Bokhoven, Professor for Heterogeneous Catalysis Institute for Chemical and Bioengineering ETH Zurich Head of Laboratory for Catalysis and Sustainable Chemistry (LSK) Swiss Light Source Paul Scherrer Institute Understanding a functioning catalyst requires understanding at the atomic scales in a time-resolved manner. X-rays can be readily used to accomplish that task, because of the large penetration depth of hard X-rays, in situ or operando experiments are possible. In addition, complementary techniques, such as the vibrational spectroscopies can be simultaneously applied. Recent development in instrumentation to perform quick EXAFS and secondary emission spectroscopy has provided exciting new opportunities to

71

Catalysis Working Group Kick-Off Meeting: May 2012  

Broader source: Energy.gov [DOE]

Information from the Catalysis Working Group kick-off meeting held May 14, 2012, in Arlington, Virginia, in conjunction with the DOE Hydrogen and Fuel Cells Program Annual Merit Review and Peer Evaluation Meeting.

72

Theoretical investigation of solar energy conversion and water oxidation catalysis  

E-Print Network [OSTI]

Solar energy conversion and water oxidation catalysis are two great scientific and engineering challenges that will play pivotal roles in a future sustainable energy economy. In this work, I apply electronic structure ...

Wang, Lee-Ping

2011-01-01T23:59:59.000Z

73

Catalysis Working Group Kick-Off Meeting Agenda | Department...  

Energy Savers [EERE]

Kick-Off Meeting Agenda Agenda for the kick-off meeting of the U.S. Department of Energy Fuel Cell Technologies Program's Catalysis Working Group, held May 14, 2012, in Arlington,...

74

Phase-Transfer Catalysis Reaction with Strong Bases  

Science Journals Connector (OSTI)

Among the vast scope of phase-transfer catalysis (PTC) applications, the largest sector involves the reaction of anions that are reacted and/or generated under PTC conditions with species containing electrophi...

Charles M. Starks; Charles L. Liotta; Marc E. Halpern

1994-01-01T23:59:59.000Z

75

Phase-Transfer Catalysis Displacement Reactions with Simple Anions  

Science Journals Connector (OSTI)

Phase-transfer catalysis (PTC) is an excellent technique both in liquid—liquid and liquid—solid (and sometimes in liquid—vapor) modes for conducting displacement reactions with anions.

Charles M. Starks; Charles L. Liotta; Marc E. Halpern

1994-01-01T23:59:59.000Z

76

UNIRIB: Physics Topics  

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

Physics Topics Physics Topics Research Capitalizing on the strengths of nine collaborating research universities and the world-class equipment available at the Holifield Radioactive Ion Beam Facility (HRIBF) at Oak Ridge National Laboratory (ORNL), the University Radioactive Ion Beam (UNIRIB) consortium is conducting research at the forefront of nuclear physics. UNIRIB, a division of the Oak Ridge Institute for Science and Education (ORISE), brings together researchers from around the world to study the short-lived, exotic nuclei that are involved in astrophysical processes. UNIRIB researchers participate in many of the nuclear physics experiments carried out at HRIBF. UNIRIB researchers are presently leading the following physics topics. To view these files, you will need the Adobe Reader, which is available free

77

Security Topic Group  

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

Group Group Security and TEC * Tension exists between open forum concept of TEC and the ability of STG members to discuss security topics. - DOE will maintain the open forum - it will not form a subgroup of cleared members NAS Study * Some members want STG to formally recommend a fully independent review of security issues - DOE is reviewing the NAS study and has not formulated a position Security Topic Group (Continued) Classification Guide & Information Sharing Protocol * Guide is finished and undergoing internal concurrence - Slated for late September release * Protocol will be completed once the guide is issued Security-Related Lessons Learned * Lessons learned document was distributed and comments requested by the end of March Security Topic Group (Continued) SRG/CVSA Survey

78

Focus Group Meeting (Topical Meeting)  

Broader source: Energy.gov [DOE]

Topical Meeting - Training Meeting agenda, summary and information package Meeting Date: April 30, 2008

79

Topics In Primitive Roots  

E-Print Network [OSTI]

This monograph considers a few topics in the theory of primitive roots g(p) modulo a prime p>=2. A few estimates of the least primitive roots g(p) and the least prime primitive roots g^*(p) modulo p, a large prime, are determined. One of the estimate here seems to sharpen the Burgess estimate g(p) 0, to the smaller estimate g(p) 2. The expected order of magnitude is g(p) 1 constant. The corresponding estimates for least prime primitive roots g^*(p) are slightly higher. Anotrher topic deals with an effective lower bound #{p > x/log x for the number of primes p 1. The current results in the literature claim the lower bound #{p > x/(log x)^2, and have restrictions on the minimal number of fixed integers to three or more.

N. A. Carella

2015-01-23T23:59:59.000Z

80

“Hot Topics” in astrophysics  

Science Journals Connector (OSTI)

Three current topics in astrophysics are described on the occasion of the joint meeting of the AAPT and the American Astronomical Society (Jan. 7-11 2001) in San Diego CA. They are the habitability of Mars (evidence for ancient and contemporary water and indications of current volcanism);black holes and their intimate relationship with galaxy bulges including their involvement in the x-ray background; and the nature and origin of gamma-ray bursts.

Stephen P. Maran

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

Manufacturing Innovation Topics Workshop  

Broader source: Energy.gov [DOE]

The Advanced Manufacturing Office (AMO) and the Office of the Secretary of Defense Manufacturing Technology Program (OSD ManTech) will host a workshop to discuss AMO's recent Request for Information (RFI) on Clean Energy Manufacturing Topic Areas as well as the recent areas of interest announced by OSD ManTech for a new Manufacturing Innovation Institute on October 8-9, 2014 in Fort Worth, TX.

82

Topics in String Phenomenology  

E-Print Network [OSTI]

We consider two questions in string ``phenomenology.'' First, are there any generic string predictions? Second, are there any general lessons which string theory suggests for thinking about low energy models, particularly in the framework of supersymmetry? Among the topics we consider are the squark and slepton spectrum, flavor symmetries, discrete symmetries including $CP$, and Peccei-Quinn symmetries. We also note that in some cases, discrete symmetries can be used to constrain the form of supersymmetry breaking.

Michael Dine

1993-09-23T23:59:59.000Z

83

Some General Themes in Catalysis at LANL  

SciTech Connect (OSTI)

Some general themes in catalysis at LANL are: (1) Storage and release of energy within chemical bonds (e.g. H{sub 2} storage in and release from covalent bonds, N{sub 2} functionalization, CO{sub 2} functionalization, H{sub 2} oxidation/evolution, O{sub 2} reduction/evolution); (2) Can we control the chemistry of reactive substrates to effect energy relevant transformations in non-traditional media (e.g. can we promote C-C couplings, dehydrations, or hydrogenations in water under relatively mild conditions)? (3) Can we supplant precious metal or rare earth catalysts to effect these transformations, by using earth abundant metals/elements instead? Can we use organocatalysis and circumvent the use of metals completely? (4) Can we improve upon existing rare earth catalyst systems (e.g. in rare earth oxides pertinent to fluid cracking or polymerization) and reduce amounts required for catalytic efficacy? Carbohydrates can be accessed from non-food based biomass sources such as woody residues and switchgrass. After extracted from the plant source, our goal is to upgrade these classes of molecules into useful fuels.

Gordon, John C. [Los Alamos National Laboratory

2012-07-19T23:59:59.000Z

84

Final technical report, Symposium on New Theoretical Concepts and Directions in Catalysis  

SciTech Connect (OSTI)

We organized in August 2013 a “Symposium on New Theoretical Concepts and Directions in Catalysis” with the participation of 20 invited distinguished quantum chemists and other researchers who use computations to study catalysis. Symposium website; http://catalysis.cnsi.ucsb.edu/

Metiu, Horia [University of California, Santa Barbara

2014-08-22T23:59:59.000Z

85

Single-Molecule Kinetics of Nanoparticle Catalysis , Hao Shen, Guokun Liu, and Peng Chen  

E-Print Network [OSTI]

#12;Single-Molecule Kinetics of Nanoparticle Catalysis Weilin Xu , Hao Shen, Guokun Liu, and Peng to characterize in ensemble-averaged measurements. The single-molecule approach enables studying the catalysis single-molecule Áuorescence studies of single Au-nanoparticle catalysis, focusing on the theoretical

Chen, Peng

86

PNNL: Institute for Integrated Catalysis (IIC) at Pacific Northwest  

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

Institute for Integrated Catalysis Institute for Integrated Catalysis The Institute for Integrated Catalysis at Pacific Northwest National Laboratory facilitates collaborative research and development in catalysts for a secure energy future. Latest Announcements When Less Is More: Fewer Proton Relays Improve Catalytic Rates First direct comparison of three nickel-based complexes shows complexes with 2 proton relays outperform those with 4 (January 2014) Wind and other renewable energy sources are limited because the power must be used when it's generated, as it currently cannot be stored. Scientists want to store the energy in compact, easy-to-release chemical bonds. A major challenge is designing an affordable, efficient, and fast catalyst to make the chemical bonds. At the Center for Molecular Electrocatalysis,

87

Tandem Catalysis in Nanocrystal Interfaces | Department of Energy  

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

Tandem Catalysis in Nanocrystal Interfaces Tandem Catalysis in Nanocrystal Interfaces Tandem Catalysis in Nanocrystal Interfaces July 18, 2011 - 2:45pm View(active tab) Edit Workflow Addthis A unique new bilayer nanocatalyst system. | Image courtesy of Yang group A unique new bilayer nanocatalyst system. | Image courtesy of Yang group What does this mean for me? A prime example of these applications is artificial photosynthesis -- the effort to capture energy from the sun and transform it into electricity or chemical fuels. Catalysts (substances that speed up the rates of chemical reactions without themselves being chemically changed) are used to initiate virtually every industrial manufacturing process that involves chemistry. With the advent of nano-sized catalysts, metal and metal oxide catalysts have surged in

88

Jeffrey T. Miller Wins Award for Excellence in Catalysis  

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

van Veenendaal of X-ray Science Division wins 2009 NIU Presidential van Veenendaal of X-ray Science Division wins 2009 NIU Presidential Research Professorship 2009 APSUO Compton Award to Grübel, Mochrie, and Sutton New Era of Research Begins as World's First Hard X-ray Laser Achieves "First Light" Unique Uranium Source in Naturally Bioreduced Sediment Jonathan Lang Named 2008 PSC Supervisor of the Year APS News Archives: 2012 | 2011 | 2010 | 2009 2008 | 2007 | 2006 | 2005 2004 | 2003 | 2002 | 2001 2000 Subscribe to APS News rss feed Jeffrey T. Miller Wins Award for Excellence in Catalysis JUNE 15, 2009 Bookmark and Share Jeffrey T. Miller Jeffrey T. Miller, leader of the Heterogeneous Catalysis Group in the Argonne National Laboratory Chemical Sciences and Engineering Division (CSE), has been presented with the 2009 Award for Excellence in Catalysis

89

Theoretical Study on Catalysis by Protein Enzymes and Ribozyme  

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

Theoretical Study on Theoretical Study on Catalysis by Protein Enzymes and Ribozyme Theoretical Study on Catalysis by Protein Enzymes and Ribozyme 2000 NERSC Annual Report 17shkarplus.jpg The energetics were determined for three mechanisms proposed for TIM catalyzed reactions. Results from reaction path calculations suggest that the two mechanisms that involve an enediol intermediate are likely to occur, while the direct intra-substrate proton transfer mechanism (in green) is energetically unfavorable due to the presence of His95 in the active site. Principal Investigator: Martin Karplus, Harvard University Research Objectives The goal of this project is to develop a greater understanding of the mechanisms involved in enzyme catalysis and related protein functions. We are studying two types of enzymes: proteins and a nucleic acid (hammerhead

90

Lorentzian homogeneous spaces admitting a homogeneous structure of type T1+T3  

E-Print Network [OSTI]

We show that a Lorentzian homogeneous space admitting a homogeneous structure of type T1 + T3 is either a (locally) symmetric space or a singular homogeneous plane wave.

P. Meessen

2005-04-07T23:59:59.000Z

91

Coherence delay augmented laser beam homogenizer  

DOE Patents [OSTI]

The geometrical restrictions on a laser beam homogenizer are relaxed by ug a coherence delay line to separate a coherent input beam into several components each having a path length difference equal to a multiple of the coherence length with respect to the other components. The components recombine incoherently at the output of the homogenizer, and the resultant beam has a more uniform spatial intensity suitable for microlithography and laser pantogography. Also disclosed is a variable aperture homogenizer, and a liquid filled homogenizer.

Rasmussen, P.; Bernhardt, A.

1993-06-29T23:59:59.000Z

92

Coherence delay augmented laser beam homogenizer  

DOE Patents [OSTI]

The geometrical restrictions on a laser beam homogenizer are relaxed by ug a coherence delay line to separate a coherent input beam into several components each having a path length difference equal to a multiple of the coherence length with respect to the other components. The components recombine incoherently at the output of the homogenizer, and the resultant beam has a more uniform spatial intensity suitable for microlithography and laser pantogography. Also disclosed is a variable aperture homogenizer, and a liquid filled homogenizer.

Rasmussen, Paul (Livermore, CA); Bernhardt, Anthony (Berkeley, CA)

1993-01-01T23:59:59.000Z

93

Origins of catalysis by computationally designed retroaldolase enzymes  

E-Print Network [OSTI]

Origins of catalysis by computationally designed retroaldolase enzymes Jonathan K. Lassilaa , David enzymes with the goal of understanding the extent and the origins of their catalytic power. Direct comparison of the designed enzymes to primary amine catalysts in solution revealed a rate acceleration of 105

Herschlag, Dan

94

Solar Energy without Neutrinos: Fusion Catalysis by Quarks  

Science Journals Connector (OSTI)

... some features of fusion catalysis by quarks and the consequences relating to release of stellar energy. In particular, the recent non-observation8 of ... . In particular, the recent non-observation8 of solar neutrinos which rules out9-12 the carbon cycle as the main mechanism for ...

L. MARSHALL LIBBY; F. J. THOMAS

1969-06-28T23:59:59.000Z

95

Frontiers in Catalysis Science and Engineering Seminar Series  

E-Print Network [OSTI]

THE CATALYTIC UPGRADE OF PYROLYSIS OIL IN VAPOR AND LIQUID PHASES Presented by... Daniel E. Resasco ·Douglas Engineering ·University of Oklahoma Abstract An effective approach to stabilize pyrolysis oil is conducting for Interfacial Reaction Engineering (CIRE) http://www.ou.edu/catalysis/ Center for Biomass Befining (CBR) http

96

The Catalysis of the Carbon Monoxide-Steam Reaction  

Science Journals Connector (OSTI)

...The Catalysis of the Carbon Monoxide-Steam Reaction F. J. Long K. W. Sykes The kinetics of the carbon monoxide-steam reaction occurring heterogeneously at...nearly unity, while that with respect to steam is correspondingly lowered; a slight...

1952-01-01T23:59:59.000Z

97

Catalysis in the preparation of fragrances and flavours  

Science Journals Connector (OSTI)

This review, with more than 250 references in the field of fragrance and flavour chemistry, summarises recent progress in industrial catalysis. Applications in classical reactions, such as hydrogenations, isomerisations, hydride reductions, oxidations, hydroformylations, metathesis, aldol and Friedel–Crafts condensations in achiral, racemic and asymmetric fashion are discussed.

Christian Chapuis; Denis Jacoby

2001-01-01T23:59:59.000Z

98

A Single-Molecule Study of RNA Catalysis and Folding  

E-Print Network [OSTI]

A Single-Molecule Study of RNA Catalysis and Folding Xiaowei Zhuang,1 * Laura E. Bartley,2 * Hazen and undocks from the ribozyme core was observed directly in single-molecule time trajectories, allowing. These results establish single-molecule fluorescence as a pow- erful tool for examining RNA folding. Virtually

Herschlag, Dan

99

Overview of surface science and catalysis by Qifei Wu  

E-Print Network [OSTI]

surfaces: single crystal transition metals, metal nanoparticles (Au), metal oxides, sulfides, carbides: · Metcars are the better catalysts for HDS than the other metal carbide materials. · Metcars have better: Sulfides (RuS2), carbides (MoC, TiC) #12;Density Functional Theory in Catalysis Employ DFT to understand

100

Methanol Synthesis over Cu/ZnO/Al2O3: The Active Site in Industrial Catalysis  

SciTech Connect (OSTI)

Unlike homogeneous catalysts, heterogeneous catalysts that have been optimized through decades are typically so complex and hard to characterize that the nature of the catalytically active site is not known. This is one of the main stumbling blocks in developing rational catalyst design strategies in heterogeneous catalysis. We show here how to identify the crucial atomic structure motif for the industrial Cu/ZnO/Al{sub 2}O{sub 3} methanol synthesis catalyst. Using a combination of experimental evidence from bulk-, surface-sensitive and imaging methods collected on real high-performance catalytic systems in combination with DFT calculations. We show that the active site consists of Cu steps peppered with Zn atoms, all stabilized by a series of well defined bulk defects and surface species that need jointly to be present for the system to work.

Behrens, Malte

2012-03-28T23:59:59.000Z

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

Topics for letter "Q" | EMSL  

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

Virtual Tour Topics for letter "Q" QAMS quadrupolar nuclei quadrupole quadrupole mass filter qualifications quantification Quardrupole Quasi-optical bridge Quiet Wing Quiet Wing...

102

Topics for letter "R" | EMSL  

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

Development Lab Quiet Wing Radiochemistry Annex Virtual Tour Topics for letter "R" R&D 100 award radiochemistry Radiochemistry Annex Radiochemistry Annex radiologial...

103

Topics for letter "u" | EMSL  

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

Lab Quiet Wing Radiochemistry Annex Virtual Tour Topics for letter "u" uantitative UEC UHV VT SPM ultra-high resolution ultra-high vacuum Ultrafast ultrahigh vacuum ultraviolet...

104

Topics for letter "W" | EMSL  

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

Lab Quiet Wing Radiochemistry Annex Virtual Tour Topics for letter "W" W-band pulsed EPR spectrometer Washington State Academy of Sciences Washington State University waste...

105

Topics for letter "n" | EMSL  

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

Development Lab Quiet Wing Radiochemistry Annex Virtual Tour Topics for letter "n" nano Nano Letters nano-scale particles nano-SIMS NanoDesi nanodevices nanoparticle...

106

TEC Working Group Topic Groups Archives Consolidated Grant Topic Group |  

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

Consolidated Grant Topic Consolidated Grant Topic Group TEC Working Group Topic Groups Archives Consolidated Grant Topic Group The Consolidated Grant Topic Group arose from recommendations provided by the TEC and other external parties to the DOE Senior Executive Transportation Forum in July 1998. It was proposed that the consolidation of multiple funding streams from numerous DOE sources into a single grant would provide a more equitable and efficient means of assistance to States and Tribes affected by DOE nuclear material shipments. The group serves as an important vehicle for DOE senior managers to assess and incorporate stakeholder input into the development of a consolidated funding vehicle for transportation activities, should DOE implement such a program. Some of the major issues under consideration by the Consolidated Grant

107

HOMOGENEOUS CATALYSIS AND MASS TRANSFER IN BIPHASIC IONIC LIQUID SYSTEMS WITH COMPRESSED CO2 AND ORGANIC COMPOUNDS  

E-Print Network [OSTI]

is separating and reusing precious metal catalyst; therefore, it needs to be performed in a convenient platform. To figure out this problem, a biphasic system can be suggested in which one phase sequesters the solid catalyst and the other phase delivers...

Ahosseini, Azita

108

One- and two-dimensional infrared spectroscopic studies of solution-phase homogeneous catalysis and spin-forbidden reactions  

SciTech Connect (OSTI)

Understanding chemical reactions requires the knowledge of the elementary steps of breaking and making bonds, and often a variety of experimental techniques are needed to achieve this goal. The initial steps occur on the femto- through picosecond time-scales, requiring the use of ultrafast spectroscopic methods, while the rate-limiting steps often occur more slowly, requiring alternative techniques. Ultrafast one and two-dimensional infrared and step-scan FTIR spectroscopies are used to investigate the photochemical reactions of four organometallic complexes. The analysis leads to a detailed understanding of mechanisms that are general in nature and may be applicable to a variety of reactions.

Sawyer, Karma Rae

2008-12-12T23:59:59.000Z

109

Pacific Northwest National Laboratory Catalysis Highlights for FY2007  

SciTech Connect (OSTI)

To reduce the nation’s dependence on imported oil, the U.S. Department of Energy (DOE) and other federal and private agencies are investing in understanding catalysis. This report focuses on catalysis research conducted by Pacific Northwest National Laboratory (PNNL) and its collaborators. Using sophisticated instruments in DOE’s Environmental Molecular Sciences Laboratory, a national scientific user facility, research was conducted to answer key questions related to the nation’s use of automotive fuels. Research teams investigated how hydrogen can be safely stored and efficiently released, critical questions to use this alternative fuel. Further, they are answering key questions to design molecular catalysts to control the transfer of hydrogen atoms, hydrides, and protons important to hydrogen production. In dealing with today’s fuels, researchers examined adsorption of noxious nitrous oxides in automotive exhaust. Beyond automotive fuel, researchers worked on catalysts to harness solar power. These catalysts include the rutile and anatase forms of titanium dioxide. Basic research was conducted on designing catalysts for these and other applications. Our scientists examined how to build catalysts with the desired properties atom by atom and molecule by molecule. In addition, this report contains brief descriptions of the outstanding accomplishments of catalysis experts at PNNL.

Garrett, Bruce C.

2007-11-15T23:59:59.000Z

110

Catalysis Center for Energy Innovation (CCEI) | U.S. DOE Office...  

Office of Science (SC) Website

Catalysis Center for Energy Innovation (CCEI) Energy Frontier Research Centers (EFRCs) EFRCs Home Centers EFRC External Websites Research Science Highlights News & Events...

111

Homogeneous catalysts in hypersonic combustion  

SciTech Connect (OSTI)

Density and residence time both become unfavorably small for efficient combustion of hydrogen fuel in ramjet propulsion in air at high altitude and hypersonic speed. Raising the density and increasing the transit time of the air through the engine necessitates stronger contraction of the air flow area. This enhances the kinetic and thermodynamic tendency of H/sub 2/O to form completely, accompanied only by N/sub 2/ and any excess H/sub 2/(or O/sub 2/). The by-products to be avoided are the energetically expensive fragment species H and/or O atoms and OH radicals, and residual (2H/sub 2/ plus O/sub 2/). However, excessive area contraction raises air temperature and consequent combustion-product temperature by adiabatic compression. This counteracts and ultimately overwhelms the thermodynamic benefit by which higher density favors the triatomic product, H/sub 2/O, over its monatomic and diatomic alternatives. For static pressures in the neighborhood of 1 atm, static temperature must be kept or brought below ca. 2400 K for acceptable stability of H/sub 2/O. Another measure, whose requisite chemistry we address here, is to extract propulsive work from the combustion products early in the expansion. The objective is to lower the static temperature of the combustion stream enough for H/sub 2/O to become adequately stable before the exhaust flow is massively expanded and its composition ''frozen.'' We proceed to address this mechanism and its kinetics, and then examine prospects for enhancing its rate by homogeneous catalysts. 9 refs.

Harradine, D.M.; Lyman, J.L.; Oldenborg, R.C.; Pack, R.T.; Schott, G.L.

1989-01-01T23:59:59.000Z

112

MORLEY RANK IN HOMOGENEOUS MODELS ALEXEI KOLESNIKOV  

E-Print Network [OSTI]

MORLEY RANK IN HOMOGENEOUS MODELS ALEXEI KOLESNIKOV AND G.V.N.G. KRISHNAMURTHI Abstract. We define an appropriate analog of the Morley rank in a totally transcendental homogeneous model with type diagram D. We-extensions of rank . This is surprising, because the proof of the statement in the first-order case depends heavily

Kolesnikov, Alexei

113

Wetting of rough surfaces: a homogenization approach  

Science Journals Connector (OSTI)

...plane xd = 0, and it is rough at a scale , where is...A (2005) Wetting of rough surfaces: a homogenization...where S1 is a closed set in Rd such that {xd 0...is finite, then L is a set with finite perimeter...A (2005) Wetting of rough surfaces: a homogenization...

2005-01-01T23:59:59.000Z

114

Summary of Selected Vision Topics  

E-Print Network [OSTI]

This is an introduction to some of the MIT AI vision work of the last few years. The topics discussed are 1) Waltz's work on line drawing semantics, 2) heterarchy, 3) the ancient learning business and 4) copying scenes. ...

Winston, Patrick H.

115

Physics Topics - MST - UW Plasma Physics  

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

Physics Topics UW Madison Madison Symmetric Torus Physics Topics MST HomeGraduate Student InformationLinksTourControl and Auxiliary SystemsPhysics TopicsDeviceResearch MissionMST...

116

Application of Atmospheric Non Thermal Plasma-Catalysis Hybrid System for Air Pollution Control: Toluene removal.  

E-Print Network [OSTI]

1 Application of Atmospheric Non Thermal Plasma-Catalysis Hybrid System for Air Pollution Control for these technologies. As an alternative to conventional VOCs abatement techniques, atmospheric non-thermal plasma (NTP rue d'Issoudun, BP 6744, 45067 Orléans Cedex 02, France. Keywords: Non thermal Plasma, Catalysis

Paris-Sud XI, Université de

117

Other Topics | Department of Energy  

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

Other Topics Other Topics Other Topics Are States required to provide a 1099 to individuals who receive State Energy Efficient Appliance Rebates? Can DOE provide suggested Privacy Act language for use in a universal WAP application form? Are weekly reports required for the SEP ARRA grant? Are there any regulations that prohibit using WAP, SEP, or EECBG funds to hire a person with a criminal record? How to keep track of Recovery Act and Non-Recovery Act funding on One Contract DOE position on potential patent infringement Reporting of funds drawn down to capitalize a revolving loan fund or loan loss reserve For purposes of Section 410 of the American Recovery and Reinvestment Act (ARRA), what are the relevant versions of the referenced building energy codes? Can a grantee request a waiver for a replacement refrigerator that

118

DOE Technical Standards Program: Topical Committees  

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

Topical Committee Topical Committee Office of Nuclear Safety Internet Linkage for TSP Topical Committees In the interest of optimum technology transfer, the DOE Technical Standards Program (TSP) has set up a network of topical committees. These committees provide a forum for communication across the DOE complex on technical standards related activities. If you would like information about a specific topical committee, or wish to join one of the groups, we've provided a roster of TSP Topical Committees and corresponding Topical Committee Chairpersons. Expectations of DOE Topical Committees The March 9, 1998 memorandum (provided here in web page format) from Rick Serbu, Technical Standards Program (TSP) Manager, EH-31, to J. Robert Wayland, Metrology Topical Committee Secretary, Sandia National Laboratories, discusses general TSP expectations of DOE topical standards committees. This memorandum should be reviewed by all DOE/contractor personnel involved in topical committee activities.

119

Argonne Chemical Sciences & Engineering - Catalysis & Energy Conversion -  

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

Ceramic Electrochemistry Ceramic Electrochemistry * Members * Contact * Publications * Overview * Solid Oxide Fuel Cells * Steam Electrolysis Catalysis & Energy Conversion Home Ceramic Electrochemistry Dave Carter and solid oxide fuel cell Materials scientist John David Carter prepares a solid oxide electrochemical cell for high temperature testing. Research activities in the Ceramic Electrochemistry Group are focused on the development of ceramic-based electrochemical devices and components, such as Solid Oxide Fuel Cells (SOFC) and High Temperature Steam Electrolyzers (HTSE). This extends to materials synthesis, fabrication, and characterization. Solid Oxide Fuel Cell Research As part of the Solid State Energy Conversion Alliance (SECA) Core Technology Program, the goal of this research is the development of solid

120

Inorganic Chemistry in Hydrogen Storage and Biomass Catalysis  

SciTech Connect (OSTI)

Making or breaking C-H, B-H, C-C bonds has been at the core of catalysis for many years. Making or breaking these bonds to store or recover energy presents us with fresh challenges, including how to catalyze these transformations in molecular systems that are 'tuned' to minimize energy loss and in molecular and material systems present in biomass. This talk will discuss some challenging transformations in chemical hydrogen storage, and some aspects of the inorganic chemistry we are studying in the development of catalysts for biomass utilization.

Thorn, David [Los Alamos National Laboratory

2012-06-13T23:59:59.000Z

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

Hydrogen catalysis and scavenging action of Pd-POSS nanoparticles  

SciTech Connect (OSTI)

Prompted by the need for a self-supported, chemically stable, and functionally flexible catalytic nanoparticle system, we explore a system involving Pd clusters coated with a monolayer of polyhedral oligomeric silsesquioxane (POSS) cages. With an initial theoretical focus on hydrogen catalysis and sequestration in the Pd-POSS system, we report Density Functional Theory (DFT) results on POSS binding energies to the Pd(110) surface, hydrogen storing ability of POSS, and possible pathways of hydrogen radicals from the catalyst surface to unsaturated bonds away from the surface.

Maiti, A; Gee, R H; Maxwell, R; Saab, A

2007-02-01T23:59:59.000Z

122

Model heterogeneous acid catalysts and metal-support interactions: A combined surface science and catalysis study  

SciTech Connect (OSTI)

This (<100 [Angstrom]) silica-alumina layers were tested as potential model heterogeneous acid catalysts for combined surface science and catalysis studies. Three preparation methods were used: oxidation of r3 [times] r3 R30 Al/Si(111) structure in UHV; deposition on Si(lll) from aqueous solution; and argon ion beam sputter deposition in UHV. The homogeneous thin layers are amorphous, and the chemical environment of surface atoms is similar to that of Si, Al and oxygen atoms on high surface area acid catalysts. Since the ion beam-deposited thin layer of silica-alumina has the same composition as the target zeolite this deposition method is a promising tool to prepare model catalysts using practical catalyst targets. The silica-alumina layers are active in cumene cracking, a typical acid catalyzed reaction. In order to clearly distinguish background reactions and the acid catalyzed reaction at least 20 cm[sup 2] catalyst surface area is needed. Two series of model platinum-alumina catalysts were prepared in a combined UHV -- high pressure reactor cell apparatus by depositing alumina on polycrystalline Pt foil and by vapor depositing Pt on a thin alumina layer on Au. Both model surfaces have been prepared with and without chlorine. AES, CO desorption as well as methyl cyclopentane (MCP) hydrogenolysis studies indicate that the Pt surface area is always higher if a chlorination step is involved. Selectivity patterns in MCP ring opening on Pt-on-alumina'' and on alumina-on-Pt'' are different; only the former is a linear combination of selective and statistical ring opening. Product distribution, however, changes with coverage and reaction time. The properties of the two model catalyst systems and role of chlorine in MCP hydrogenolysis are also discussed.

Boszormenyi, I.

1991-05-01T23:59:59.000Z

123

Model heterogeneous acid catalysts and metal-support interactions: A combined surface science and catalysis study  

SciTech Connect (OSTI)

This (<100 {Angstrom}) silica-alumina layers were tested as potential model heterogeneous acid catalysts for combined surface science and catalysis studies. Three preparation methods were used: oxidation of r3 {times} r3 R30 Al/Si(111) structure in UHV; deposition on Si(lll) from aqueous solution; and argon ion beam sputter deposition in UHV. The homogeneous thin layers are amorphous, and the chemical environment of surface atoms is similar to that of Si, Al and oxygen atoms on high surface area acid catalysts. Since the ion beam-deposited thin layer of silica-alumina has the same composition as the target zeolite this deposition method is a promising tool to prepare model catalysts using practical catalyst targets. The silica-alumina layers are active in cumene cracking, a typical acid catalyzed reaction. In order to clearly distinguish background reactions and the acid catalyzed reaction at least 20 cm{sup 2} catalyst surface area is needed. Two series of model platinum-alumina catalysts were prepared in a combined UHV -- high pressure reactor cell apparatus by depositing alumina on polycrystalline Pt foil and by vapor depositing Pt on a thin alumina layer on Au. Both model surfaces have been prepared with and without chlorine. AES, CO desorption as well as methyl cyclopentane (MCP) hydrogenolysis studies indicate that the Pt surface area is always higher if a chlorination step is involved. Selectivity patterns in MCP ring opening on ``Pt-on-alumina`` and on ``alumina-on-Pt`` are different; only the former is a linear combination of selective and statistical ring opening. Product distribution, however, changes with coverage and reaction time. The properties of the two model catalyst systems and role of chlorine in MCP hydrogenolysis are also discussed.

Boszormenyi, I.

1991-05-01T23:59:59.000Z

124

Materials Design and Discovery: Catalysis and Electrical Energy Storage  

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

and Discovery: Catalysis and Discovery: Catalysis and Electrical Energy Storage Presenter: N ichols A . R omero, A LCF ESP p ost---doc: Anouar B enali, A LCF PI: L arry C urAss, A NL M SD a nd C NM Comments from a reviewer on "Material Design and Discovery" from a proposal § How c ould t his m achine w ith t hese p rograms b e u sed t o d esign a n ew s olar c ell? Or a n ew c ure f or A IDS? O r a n ew h igh---T s uperconductor? T his i s n ot i ntended a s a trivial q uesAon. T he p resent m ethod o f D ISCOVERY r elies o n t he t rained h uman mind ( insight) a nd e xperiment ( serendipity). C omputaAonal s cience s o f ar h as n ot delivered a ny n ew d iscoveries b ecause i t l acks t he p ossibility o f s erendipity. T he greatest s uccess o f c omputaAonal c hemistry h as b een i mproved i nsight i nto t he way m aterial b ehaves

125

Major research topics in combustion  

SciTech Connect (OSTI)

The Institute for Computer Applications in Science and Engineering (ICASE) and NASA Langley Research Center (LaRC) hosted a workshop on October 2--4, 1989 to discuss some combustion problems of technological interest to LaRC and to foster interaction with the academic community in these research areas. The topics chosen for this purpose were flame structure, flame holding/extinction, chemical kinetics, turbulence-kinetics interaction, transition to detonation, and reacting free shear layers. This document contains the papers and edited versions of general discussions on these topics. The lead paper set the stage for the meeting by discussing the status and issues of supersonic combustion relevant to the scramjet engine. Experts were then called upon to review the current knowledge in the aforementioned areas, to focus on how this knowledge can be extended and applied to high-speed combustion, and to suggest future directions of research in these areas.

Hussaini, M.Y.; Kumar, A.; Voigt, R.G. (eds.)

1992-01-01T23:59:59.000Z

126

Argonne Chemical Sciences & Engineering - Catalysis & Energy Conversion  

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

Hydrogen and Fuel Cell Materials Hydrogen and Fuel Cell Materials * Members * Contact * Publications * Overview * Alternative Electrocatalysts * Electrocatalyst Durability * Hydrogen Storage * Electrocatalyst Degradation Catalysis & Energy Conversion Home Hydrogen and Fuel Cell Materials Polymer electrolyte fuel cell (PEFC) systems are promising alternatives to conventional power systems for transportation, portable, and stationary applications due to their high efficiency of converting fuel to electricity, low emissions, and low operating temperatures. Three major issues for PEFC systems, especially for portable and transportation use, are cost, lifetime, and fuel storage, with the fuel of choice being hydrogen. Argonne's Hydrogen and Fuel Cell Materials group has active research projects in these three areas, to enable the use of this promising technology in a variety of applications.

127

Key Accomplishments @ Catalysis: Reactivity and Structure Group | Chemistry  

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

Recent Key Accomplishments Recent Key Accomplishments WGS: Importance of the Metal-Oxide Interface in Catalysis: In Situ Studies of the Water-Gas Shift Reaction by Ambient-Pressure X-ray Photoelectron Spectroscopy A New Type of Strong Metal-Support Interaction and the Production of H-2 through the Transformation of Water on Pt/CeO2(111) and Pt/CeOx/TiO2(110) Catalysts In situ studies of CeO2-supported Pt, Ru, and Pt-Ru alloy catalysts for the water-gas shift reaction: Active phases and reaction intermediates In situ/operando studies for the production of hydrogen through the water-gas shift on metal oxide catalysts Mechanistic understanding of WGS catalysts from first principles: Au(111) Supported Oxide Nanoparticles Theoretical catalyst optimization of WGS catalysts: Cu(111) supported oxide nanostructures

128

Argonne Chemical Sciences & Engineering - Catalysis & Energy Conversion -  

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

Atom-Efficient Chemical Transformations Atom-Efficient Chemical Transformations iact logo Argonne National Laboratory along with its academic partners has established an Energy Frontier Research Center, the Institute for Atom-efficient Chemical Transformations (IACT) whose focus is to advance the science of catalysis for the efficient conversion of energy resources into usable forms. IACT is one of 46 Energy Frontier Research Centers that DOE has established in the United States. IACT is a partnership among world-class scientists at Argonne National Laboratory, Northwestern University, Purdue University, University of Wisconsin-Madison, and Brookhaven National Laboratory. Using a multidisciplinary approach involving integrated catalyst synthesis, advanced characterization, catalytic experimentation, and computation, IACT is addressing key

129

Blue Ruthenium Dimer Catalysis for Hydrogen Generation | Advanced Photon  

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

A High-Pressure Nano-imaging Breakthrough A High-Pressure Nano-imaging Breakthrough Protein Structure Could Lead to Better Treatments for HIV, Early Aging The Superpower behind Iron Oxyfluoride Battery Electrodes Watching a Protein as it Functions Shedding Light on Chemistry with a Biological Twist Science Highlights Archives: 2013 | 2012 | 2011 | 2010 2009 | 2008 | 2007 | 2006 2005 | 2004 | 2003 | 2002 2001 | 2000 | 1998 | Subscribe to APS Science Highlights rss feed Blue Ruthenium Dimer Catalysis for Hydrogen Generation APRIL 15, 2013 Bookmark and Share Key intermediates in the water oxidation catalytic cycle of the blue dimer characterized by x-ray spectroscopy. Optimization of the reactivity toward water (purple arrow) and oxidation of the resulting peroxo-intermediate (blue arrow) are needed for improved catalytic activity.

130

Metal Carbonyl-Hydrosilane Reactions and Hydrosilation Catalysis  

SciTech Connect (OSTI)

Manganese carbonyl complexes serve as hydrosilation precatalysts for selectively transforming a carbonyl group into a siloxy methylene or a fully reduced methylene group. Substrates of interest include (1) aldehydes, ketones, carboxylic acids, silyl esters, and esters, and (2) their organometallic acyl counterparts. Three relevant catalytic reactions are shown. Two types of manganese precatalysts have been reported: (a) alkyl and acyl complexes (L)(C0){sub 4}MnR [L = CO, PPh{sub 3}; R = COCH{sub 3}, COPh, CH{sub 3}] and (b) halides (CO){sub 5}MnX and [(CO){sub 4}MnX]{sub 2} (X = Br, I). The former promote hydrosilation and deoxygenation catalysis; the latter promote dehydrogenative silation of alcohols and carboxylic acids as well as hydrosilation and deoxygenation of some metallocarboxylic acid derivatives. In every case studied, these Mn precatalysts are far more reactive or selective than traditional Rh(I) precatalysts.

Cutler, A. R.

2001-04-14T23:59:59.000Z

131

Tandem Catalysis in Nanocrystal Interfaces | Department of Energy  

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

Interfaces Interfaces Tandem Catalysis in Nanocrystal Interfaces July 18, 2011 - 2:45pm View(active tab) Edit Workflow Addthis A unique new bilayer nanocatalyst system. | Image courtesy of Yang group A unique new bilayer nanocatalyst system. | Image courtesy of Yang group What does this mean for me? A prime example of these applications is artificial photosynthesis -- the effort to capture energy from the sun and transform it into electricity or chemical fuels. Catalysts (substances that speed up the rates of chemical reactions without themselves being chemically changed) are used to initiate virtually every industrial manufacturing process that involves chemistry. With the advent of nano-sized catalysts, metal and metal oxide catalysts have surged in importance. Recently, researchers at the Department's Lawrence Berkeley National

132

On Twisted homogeneous racks of type D  

E-Print Network [OSTI]

We develop some techniques to check when a twisted homogeneous rack of class (L,t,\\theta) is of type D. Then we apply the obtained results to the cases L an alternating group on n letters, n\\geq 5, or L a sporadic group.

Andruskiewitsch, N; Garcia, G A; Vendramin, L

2010-01-01T23:59:59.000Z

133

Homogeneous quasimorphisms on the symplectic linear group  

E-Print Network [OSTI]

obtain |(g) + (g-1 )| C/k for every k and so (g-1 ) = -(g). Hence (ghg-1 ) - (h) = (ghg-1 ) - (g) - (h) - (g-1 ) 2C. Using homogeneity again we obtain (ghg-1 ) = (h) for all g, h G. Proof of Theorem 1. Let

Salamon, Dietmar A.

134

ANDREA BRAIDES Homogenization of Lattice Systems  

E-Print Network [OSTI]

) Identification: identify u with some continuous parameter (e.g., its piecewise-constant interpolation; a sum(ui, uj) indexed on a scaled lattice (e.g., Zd ) Identification: identify u with some continuous.Braides: Homogenization of Lattice Systems #12;BINARY SYSTEMS: Continuous limits of ferromagnetic energies Bulk scaling

Braides, Andrea

135

A Homogenized Energy Framework for Ferromagnetic Hysteresis  

E-Print Network [OSTI]

energy relations at the mesoscopic or lattice level based on the assumption that magnetic momentsA Homogenized Energy Framework for Ferromagnetic Hysteresis Ralph C. Smith Marcelo J. Dapino Center or spins are restricted to two orientations. Direct minimization of the Gibbs energy yields local average

136

337th Catalysis Research Center (CRC) Colloquium Fluorine Industry in China  

E-Print Network [OSTI]

337th Catalysis Research Center (CRC) Colloquium Fluorine Industry in China Lu Long (Shanghai, Central Research & Development, Experimental Station, DuPont Company, USA 1994.9 to1996.9 Postdoctoral

Ishii, Hitoshi

137

Transformation of Sorbitol to Biofuels by Heterogeneous Catalysis: Chemical and Industrial  

E-Print Network [OSTI]

Transformation of Sorbitol to Biofuels by Heterogeneous Catalysis: Chemical and Industrial ainsi que des exemples d'applications industrielles. Abstract -- Transformation of Sorbitol to Biofuels and biodiesel production led to first generation biofuels. Nowadays, research is focused on lignocellulosic

Boyer, Edmond

138

Studies toward biomimetic claisen condensation using nucleic acid templates and ribozyme catalysis  

E-Print Network [OSTI]

Many different experimental approaches were attempted to achieve carbon-carbon bond formation by nucleic acid template-directed reactions and ribozyme catalysis as potential lipid synthesizing machineries in the RNA world. A novel biomimetic...

Ryu, Youngha

2005-08-29T23:59:59.000Z

139

Thermochemical Conversion: Using Heat and Catalysis to Make Biofuels and Bioproducts  

Broader source: Energy.gov [DOE]

The Bioenergy Technologies Office works with industry to develop pathways that use heat, pressure, and catalysis to convert domestic, non-food biomass into gasoline, jet fuel, and other products.

140

Variables in Reaction Design for Laboratory and Industrial Applications of Phase-Transfer Catalysis  

Science Journals Connector (OSTI)

Many factors, known and unknown, contribute to the effective selection of a catalyst and other conditions for a given phase-transfer catalysis (PTC) application. Therefore, no simple single guideline exists fo...

Charles M. Starks; Charles L. Liotta; Marc E. Halpern

1994-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

Final Report on Kokes Awards for the 20th North American Catalysis Society Meeting  

SciTech Connect (OSTI)

This Final Report describes how the Kokes Awards program was carried out for the 2007 meeting with regard to selection of students and disbursement of funds received from DOE and other sources. The objective of the Richard J. Kokes Travel Award program of the American Catalysis Society is to encourage graduate students to attend and participate meaningfully in the biennial North American Catalysis Society Meeting.

Wong, Michael S.

2008-01-01T23:59:59.000Z

142

Presentation: QER Energy Topics | Department of Energy  

Office of Environmental Management (EM)

Laboratory QER Energy Topics More Documents & Publications Presentation: High Performance Computing Applications December 3, 2013 SEAB Meeting Minutes Improving Combustion...

143

Porous Metal–Organic Frameworks for Heterogeneous Biomimetic Catalysis  

Science Journals Connector (OSTI)

Homogeneous artificial metalloporphyrins can undergo catalytic deactivation via suicidal self-oxidation, which lowers their catalytic activity and sustainability relative to their counterparts in Nature. ... The 3D structure of [Zn2(HCOO)(FeIII(H2O)-TCPP)]·guest (7) is made up of layered network of FeIII-TCPP connected with binuclear Zn2(COO)4 paddle-wheel SBUs, and further linked by formate pillars to homogeneously coordinate with Zn2(COO)4 SBUs (Figure 4a). ... pillar linker DPNI to form a three-dimensional porous structure. ...

Min Zhao; Sha Ou; Chuan-De Wu

2014-02-06T23:59:59.000Z

144

Quantum Memory with a controlled homogeneous splitting  

E-Print Network [OSTI]

We propose a quantum memory protocol where a input light field can be stored onto and released from a single ground state atomic ensemble by controlling dynamically the strength of an external static and homogeneous field. The technique relies on the adiabatic following of a polaritonic excitation onto a state for which the forward collective radiative emission is forbidden. The resemblance with the archetypal Electromagnetically-Induced-Transparency (EIT) is only formal because no ground state coherence based slow-light propagation is considered here. As compared to the other grand category of protocols derived from the photon-echo technique, our approach only involves a homogeneous static field. We discuss two physical situations where the effect can be observed, and show that in the limit where the excited state lifetime is longer than the storage time, the protocols are perfectly efficient and noise-free. We compare the technique to other quantum memories, and propose atomic systems where the experiment c...

Hétet, G; Chanelière, T

2013-01-01T23:59:59.000Z

145

Topic Segmentation with Shared Topic Detection and Alignment of Multiple Documents  

E-Print Network [OSTI]

documents, term weight 1. INTRODUCTION Many researchers have worked on topic detection and track- ing (TDTTopic Segmentation with Shared Topic Detection and Alignment of Multiple Documents Bingjun Sun,giles,jyen}@ist.psu.edu, zha@cc.gatech.edu ABSTRACT Topic detection and tracking [26] and topic segmentation [15] play

Mitra, Prasenjit

146

Special Topics and Data Reports  

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

Commercial Buildings Web Site. If you need assistance in viewing this page, please call (202) 586-8800 Energy Information Administration Home Page Commercial Buildings Web Site. If you need assistance in viewing this page, please call (202) 586-8800 Energy Information Administration Home Page Home > >Commercial Buildings Home > Special Topics and Data Reports Return to: CBECS Home Page 2003 Data Reports: Yellow Arrow Commercial Buildings Characteristics (HTML format) 1999 Data Reports: Yellow Arrow Commercial Buildings Characteristics (HTML format) 1995 Data Reports: Yellow Arrow Commercial Buildings Characteristics, Energy Consumption, and Expenditures (HTML format) Yellow Arrow Commercial Buildings Characteristics (HTML format) Yellow Arrow Commercial Buildings Characteristics (PDF format, 735 KB) Yellow Arrow Energy Consumption and Expenditures (HTML format) 1992 Data Reports: Yellow Arrow Commercial Buildings Characteristics (HTML format)

147

Innovative Topics for Advanced Biofuels | Department of Energy  

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

Innovative Topics for Advanced Biofuels Innovative Topics for Advanced Biofuels PNNL report-out presentation at the CTAB webinar on innovative topics for advanced biofuels....

148

Preliminary Fuel Cell Manufacturing R&D Topics | Department of...  

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

Preliminary Fuel Cell Manufacturing R&D Topics Preliminary Fuel Cell Manufacturing R&D Topics Preliminary draft research topics subject to revision prior to a soliciatation being...

149

Application of solid ash based catalysts in heterogeneous catalysis  

SciTech Connect (OSTI)

Solid wastes, fly ash, and bottom ash are generated from coal and biomass combustion. Fly ash is mainly composed of various metal oxides and possesses higher thermal stability. Utilization of fly ash for other industrial applications provides a cost-effective and environmentally friendly way of recycling this solid waste, significantly reducing its environmental effects. On the one hand, due to the higher stability of its major component, aluminosilicates, fly ash could be employed as catalyst support by impregnation of other active components for various reactions. On the other hand, other chemical compounds in fly ash such as Fe{sub 2}O{sub 3} could also provide an active component making fly ash a catalyst for some reactions. In this paper, physicochemical properties of fly ash and its applications for heterogeneous catalysis as a catalyst support or catalyst in a variety of catalytic reactions were reviewed. Fly-ash-supported catalysts have shown good catalytic activities for H{sub 2} production, deSOx, deNOx, hydrocarbon oxidation, and hydrocracking, which are comparable to commercially used catalysts. As a catalyst itself, fly ash can also be effective for gas-phase oxidation of volatile organic compounds, aqueous-phase oxidation of organics, solid plastic pyrolysis, and solvent-free organic synthesis. 107 refs., 4 figs., 2 tabs.

Shaobin Wang [Curtin University of Technology, Perth, WA (Australia). Department of Chemical Engineering

2008-10-01T23:59:59.000Z

150

Argonne Chemical Sciences & Engineering - Publications - Catalysis and  

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

Fuel Cell Engineering Fuel Cell Engineering A H. Adachi, S. Ahmed, S. H. D. Lee, D. Papadias, R. K. Ahluwalia, J. C. Bendert, S. A. Kanner, and Y. Yamazaki, "A Natural-Gas Fuel Processor for a Residential Fuel Cell System," Journal of Power Sources, accepted for publication (2009) S. Ahmed, "Renewable Power Sources," (invited talk), University of Houston, Houston, TX, March 22-23, 2012. S. Ahmed, "Fuel Cell Based Combined Heat and Power for Small Systems (1-100 kW)," (invited talk), University of Houston, Houston, TX, March 22-23, 2012. S. Ahmed, R. Ahluwalia, S. H. D. Lee and S. Lottes, "A Gasoline Fuel Processor Designed to Study Quick-Start Performance," Journal of Power Sources 154(1), 214-222 (2006) C S. Y. Choung, M. Ferrandon, and T. Krause, "Pt-Re Bimetallic Supported on CeO2-ZrO2 Mixed Oxides as Water-Gas Shift Catalysts," Catalysis Today 99, 257-262 (2005)

151

Tracking topic birth and death in LDA.  

SciTech Connect (OSTI)

Most topic modeling algorithms that address the evolution of documents over time use the same number of topics at all times. This obscures the common occurrence in the data where new subjects arise and old ones diminish or disappear entirely. We propose an algorithm to model the birth and death of topics within an LDA-like framework. The user selects an initial number of topics, after which new topics are created and retired without further supervision. Our approach also accommodates many of the acceleration and parallelization schemes developed in recent years for standard LDA. In recent years, topic modeling algorithms such as latent semantic analysis (LSA)[17], latent Dirichlet allocation (LDA)[10] and their descendants have offered a powerful way to explore and interrogate corpora far too large for any human to grasp without assistance. Using such algorithms we are able to search for similar documents, model and track the volume of topics over time, search for correlated topics or model them with a hierarchy. Most of these algorithms are intended for use with static corpora where the number of documents and the size of the vocabulary are known in advance. Moreover, almost all current topic modeling algorithms fix the number of topics as one of the input parameters and keep it fixed across the entire corpus. While this is appropriate for static corpora, it becomes a serious handicap when analyzing time-varying data sets where topics come and go as a matter of course. This is doubly true for online algorithms that may not have the option of revising earlier results in light of new data. To be sure, these algorithms will account for changing data one way or another, but without the ability to adapt to structural changes such as entirely new topics they may do so in counterintuitive ways.

Wilson, Andrew T.; Robinson, David Gerald

2011-09-01T23:59:59.000Z

152

International Energy Outlook - Special Topics  

Gasoline and Diesel Fuel Update (EIA)

A A Energy Information Administration Forecast Channel. If having trouble viewing this page, contact the National Energy Informaiton Center at (202) 586-8800. Return to Energy Information Administration Home Page Home > Environment> International Energy Outlook> Special Topics International Energy Outlook 2004 Converting Gross Domestic Product for Different Countries to U.S. Dollars: Market Exchange Rates and Purchasing Power Parity Rates The world energy forecasts in IEO2004 are based primarily on projections of GDP for different countries and regions, which for purposes of comparison are expressed in 1997 U.S. dollars. First, GDP projections are prepared for the individual countries in terms of their own national currencies and 1997 prices of goods and services. Then, the projections are converted to 1997 U.S. dollars by applying average 1997 foreign exchange rates between the various national currencies and the dollar. The resulting projections of real GDP are thus based on national 1997 prices in each country and the 1997 market exchange rate (MER) for each currency against the U.S. dollar.

153

Property:DIA/Topic | Open Energy Information  

Open Energy Info (EERE)

Topic Topic Jump to: navigation, search Property Name DIA/Topics Property Type String Description Development Impacts Assessment Toolkit property to help filter pages Used in Form/Template Tool Allows Values Environmental;Economic;Social Pages using the property "DIA/Topic" Showing 7 pages using this property. A Alternative Fuel and Advanced Technology Vehicles Pilot Program Emissions Benefit Tool + Environmental + Applied Dynamic Analysis of the Global Economy (ADAGE) Model + Environmental +, Economic + E Electricity Markets Analysis (EMA) Model + Environmental +, Economic +, Social + Energy Forecasting Framework and Emissions Consensus Tool (EFFECT) + Environmental + P Powering Health + Social + T Threshold 21 Model + Social + U UNEP-Bioenergy Decision Support Tool + Environmental +, Economic +, Social +

154

Small Business Funding Opportunity Topics Released | Department...  

Energy Savers [EERE]

Office of Energy Efficiency and Renewable Energy (EERE) today announced nine topics and 26 new subtopics under its Small Business Innovation Research (SBIR) and Technology...

155

E-Print Network Topics: F  

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

investigations formation nw jordan formation ofextrachromosomal dnas formation oil shale formation oil shales formation ombilin basin formation options topical formation ordos...

156

Events & Topics Tours | Photosynthetic Antenna Research Center  

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

Climate Technologies campus, to be followed by a brief presentation. Topics will include home automation, the internet of things, wireless sensor networks, and other smart...

157

Geek-Up[3.11.2011]: Energy Efficiency, Catalysis and Open Source Tools |  

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

1.2011]: Energy Efficiency, Catalysis and Open Source 1.2011]: Energy Efficiency, Catalysis and Open Source Tools Geek-Up[3.11.2011]: Energy Efficiency, Catalysis and Open Source Tools March 11, 2011 - 4:37pm Addthis L. Keith Woo | Photo courtesy of Ames National Laboratory L. Keith Woo | Photo courtesy of Ames National Laboratory Niketa Kumar Niketa Kumar Public Affairs Specialist, Office of Public Affairs Ames Laboratory researcher and Iowa State University professor L. Keith Woo is on the search for catalysts that lead to more efficient, safer and cleaner chemical reactions that work at lower pressures and temperatures and create less waste. In one project, Dr. Woo is working to understand the chemistry behind fast pyrolysis for creating bio-oil from biomass. Fast pyrolysis quickly heats up biomass (such as corn stalks and leaves) in the absence of oxygen to

158

Supported Molten Metal Catalysis. A New Class of Catalysts  

SciTech Connect (OSTI)

We describe a new class of heterogeneous catalysts called supported molten metal catalysis (SMMC), in which molten metal catalysts are dispersed as nanodroplets on the surface of porous supports, allowing much larger active surface area than is possible in conventional contacting techniques for catalytic metals that are molten under reaction conditions, thus greatly enhancing their activity and potential utility. Specific examples of different types of reactions are provided to demonstrate the broad applicability of the technique in designing active, selective, and stable new catalysts. It is shown that dispersing the molten metal on a support in the suggested manner can enhance the rate of a reaction by three to four orders of magnitude as a result of the concomitant increase in the active surface area. New reaction examples include {gamma}-Al{sub 2}O{sub 3} supported molten Te (melting point 450 C) and Ga (MP 30 C) catalysts for bifunctional methylcyclohexane dehydrogenation. These catalysts provide activity similar to conventional Pt-based catalysts for this with better resistance to coking. In addition, results are described for a controlled pore glass supported molten In (MP 157 C) catalyst for the selective catalytic reduction of NO with ethanol in the presence of water, demonstrating activities superior to conventional catalysts for this reaction. A discussion is also provided on the characterization of the active surface area and dispersion of these novel supported catalysts. It is clear based on the results described that the development of new active and selective supported molten metal catalysts for practical applications is entirely plausible.

Ravindra Datta; Ajeet Singh; Manuela Serban; Istvan Halasz

2006-06-02T23:59:59.000Z

159

Advanced Topics in Types and Programming Languages  

E-Print Network [OSTI]

Advanced Topics in Types and Programming Languages Benjamin C. Pierce, editor The MIT Press Advanced Topics in Types and programming languages / Benjamin C. Pierce, editor p. cm. Includes bibliographical references and index. ISBN 0-262-16228-8 (hc.: alk. paper) 1. Programming languages (Electronic

Pitts, Andrew

160

TOPICS IN CLIMATE RESEARCH Course Description  

E-Print Network [OSTI]

Projects 6 Climate Theory; Climate Forcing; Climate Feedbacks I 4 7 Climate Theory; Climate ForcingTOPICS IN CLIMATE RESEARCH AT 755 Course Description: This course is a survey of current topics in climate research, including the decadal to paleoclimate observational record, the impacts of climate

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

TASK PLAN: Tribal Issues Topic Group  

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

Task Plan 1 Tribal Issues Topic Group 7/12/00 Task Plan 1 Tribal Issues Topic Group 7/12/00 Task Plan 1 Page 1 Status: Active DOE Lead: National Transportation Program (NTP-AL; Judith Holm @ 505-845-4767) Start Date: January 1998 End Date: TBD Subject: TEC Topic Group - Tribal Issues rpose: To address issues such as: (1) HM-164 as it relates to Tribes; (2) to complete the Tribal column of the Rail Topic Group Regulatory Matrix; (3) to determine Tribal authority to stop and inspect shipments of radioactive materials; (4) to provide tribal pre-notification of DOE spent fuel shipments consistent with DOE policy and to provide continuous satellite-based tracking and monitoring capability to Tribes; (5) and to address Tribal involvement in transportation planning, training, and funding. The Topic Group

162

Growth mechanism of graphene on platinum: Surface catalysis and carbon segregation  

SciTech Connect (OSTI)

A model of the graphene growth mechanism of chemical vapor deposition on platinum is proposed and verified by experiments. Surface catalysis and carbon segregation occur, respectively, at high and low temperatures in the process, representing the so-called balance and segregation regimes. Catalysis leads to self-limiting formation of large area monolayer graphene, whereas segregation results in multilayers, which evidently “grow from below.” By controlling kinetic factors, dominantly monolayer graphene whose high quality has been confirmed by quantum Hall measurement can be deposited on platinum with hydrogen-rich environment, quench cooling, tiny but continuous methane flow and about 1000?°C growth temperature.

Sun, Jie, E-mail: jie.sun@chalmers.se; Lindvall, Niclas; Yurgens, August [Quantum Device Physics Laboratory, Department of Microtechnology and Nanoscience, Chalmers University of Technology, SE-41296 Gothenburg (Sweden); Nam, Youngwoo [Quantum Device Physics Laboratory, Department of Microtechnology and Nanoscience, Chalmers University of Technology, SE-41296 Gothenburg (Sweden); Department of Physics and Astronomy, Seoul National University, Seoul 151-747 (Korea, Republic of); Cole, Matthew T. [Electrical Engineering Division, Department of Engineering, University of Cambridge, 9 JJ Thomson Avenue, CB3 0FA Cambridge (United Kingdom); Teo, Kenneth B. K. [AIXTRON Nanoinstruments Ltd., Swavesey, CB24 4FQ Cambridge (United Kingdom); Woo Park, Yung [Department of Physics and Astronomy, Seoul National University, Seoul 151-747 (Korea, Republic of)

2014-04-14T23:59:59.000Z

163

TEC Working Group Topic Groups Rail Conference Call Summaries Rail Topic  

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

Summaries Rail Summaries Rail Topic Group TEC Working Group Topic Groups Rail Conference Call Summaries Rail Topic Group Rail Topic Group May 17, 2007 January 16, 2007 August 31, 2006 July 27, 2006 June 8, 2006 April 20, 2006 March 9, 2006 January 26, 2006 November 9, 2005 September 15, 2005 April 28, 2005 March 24, 2005 February 24, 2005 January 27, 2005 December 16, 2004 October 28, 2004 May 17, 2004 June 2, 2003 June 26, 2002 March 26, 1999 November 13, 1998 Meeting October 6, 1998 Meeting September 11, 1998 Meeting June 22, 1998 Meeting May 27, 1998 Meeting November 3, 1997 Meeting September 18, 1997 Meeting More Documents & Publications TEC Working Group Topic Groups Routing Conference Call Summaries TEC Working Group Topic Groups Rail Meeting Summaries TEC Working Group Topic Groups Rail Conference Call Summaries Inspections

164

Property:ProgramTopics | Open Energy Information  

Open Energy Info (EERE)

ProgramTopics ProgramTopics Jump to: navigation, search This is a page of String. Pages using the property "ProgramTopics" Showing 25 pages using this property. (previous 25) (next 25) 2 2008 Solar Technologies Market Report + Market analysis +, Resource assessment + 2010 Carbon Sequestration Atlas of the United States and Canada: Third Edition + Potentials & Scenarios + 2010 Solar Market Transformation Analysis and Tools + Market analysis +, Pathways analysis +, Technology characterizations + 2010 Vehicle Technologies Market Report + Deployment Data + A A Case for Climate Neutrality: Case Studies on Moving Towards a Low Carbon Economy + Implementation +, Low emission development planning + A Compendium of Utility-Sponsored Energy-Efficient Rebate Programs + Policy +, Deployment +, & Program Impact +

165

New Strategies for Organic Catalysis: The First Enantioselective Organocatalytic 1,3-Dipolar  

E-Print Network [OSTI]

Versity of California Berkeley, California 94720 DiVision of Chemistry and Chemical Engineering California Institute of broadly useful new strategies for enantioselective catalysis that utilize organic chemicals as reaction platform for the develop- ment of enantioselective organocatalytic Diels-Alder reactions (eq 2

MacMillan, David W. C.

166

Catalysis by dihydrofolate reductase and other enzymes arises from electrostatic preorganization,  

E-Print Network [OSTI]

Catalysis by dihydrofolate reductase and other enzymes arises from electrostatic preorganization dynamical effects. We then generate the catalytic land- scape of the enzyme and demonstrate that motions catalytic power of enzymes has been attempted to be rationalized by several proposals. Here, we would like

Barton, Paul I.

167

Structural model of F1–ATPase and the implications for rotary catalysis  

Science Journals Connector (OSTI)

...and R. M. Simmons Structural model of F1-ATPase and the implications for rotary...crystal structure of bovine mitochondrial F1-ATPase is described. Several features...approximately spherical alpha3beta3 sub-assembly. F1-ATPase|crystal structure|rotary catalysis...

2000-01-01T23:59:59.000Z

168

High-throughput metal nanoparticle catalysis by pulsed laser ablation Selim Senkan a,*, Michael Kahn a  

E-Print Network [OSTI]

High-throughput metal nanoparticle catalysis by pulsed laser ablation Selim Senkan a,*, Michael online 18 July 2006 Abstract A high-throughput pulsed laser ablation (HT-PLA) system was developed-TEM) and energy dispersive X-ray (EDX) spectroscopy, respectively. The supported nanoparticles created by HT

Senkan, Selim M.

169

Pacific Northwest National Laboratory: INstItute for INterfacIaL cataLysIs  

E-Print Network [OSTI]

-pressure hydrogen may be the fuel/energy carrier in the long term, strategies to help supply and maintain the nation and diesel. the Institute for Interfacial catalysis is supporting PNNL's energy conversion Initiative conversion of coal to liquid transportation fuels. IndIReCt LIqueFaCtIon: MoRe VaLuabLe PRoduCts FoR Less

170

Journal of Catalysis 225 (2004) 300306 www.elsevier.com/locate/jcat  

E-Print Network [OSTI]

shown that methanol can be produced by using N2O as the oxidant, rather than O2 [1­3]. More recently framework positions and ex- traframework Fe) can be used to produce methanol from CH4 and N2O. Above 523 KJournal of Catalysis 225 (2004) 300­306 www.elsevier.com/locate/jcat Methanol formation on Fe

Bell, Alexis T.

171

Catalysis Today 53 (1999) 433441 New insights into methanol synthesis catalysts from X-ray absorption  

E-Print Network [OSTI]

O and Cr2O3 mixtures and produced methanol in low yields from CO­H2 mixtures at high temperatures (593Catalysis Today 53 (1999) 433­441 New insights into methanol synthesis catalysts from X a consistent structural picture of methanol synthesis catalysts. Copper metal is the principal Cu species

Iglesia, Enrique

172

Applied Catalysis A: General 226 (2002) 183192 NO reduction by urea under lean conditions  

E-Print Network [OSTI]

-734-763-0459. E-mail address: gulari@engin.umich.edu (E. Gulari). burn gasoline or a diesel engine. Early studiesApplied Catalysis A: General 226 (2002) 183­192 NO reduction by urea under lean conditions over, Jiraporn Leeratc, Somchai Osuwanc a Chemical Engineering Department, University of Michigan, Ann Arbor, MI

Gulari, Erdogan

173

ANL/ALCF/ESP-13/2 Materials Design and Discovery: Catalysis and  

E-Print Network [OSTI]

electronic) degrees of freedom are relevant, the methods of choice in the surface science, condensed matter) project was to perform fast-accurate DFT calculations on materials for energy and catalysis using the GPAW[1, 2, 3] code on Blue Gene/Q. The types of calculations included significantly reduced time

Kemner, Ken

174

Probing the chemistry of thioredoxin catalysis Arun P. Wiita1,2  

E-Print Network [OSTI]

organisms1 . Although catalysis is thought to proceed through a substitution nucleophilic bimolecular (SN2) reaction1,2 , the role of the enzyme in modulating this chemical reaction is unknown. Here, using single of the catalytic reaction, the first requiring a reorientation of the substrate disulphide bond, causing a short

Fernandez, Julio M.

175

Diversity of chemical mechanisms in thioredoxin catalysis revealed by single-molecule force spectroscopy  

E-Print Network [OSTI]

-origin Trxs show both nucleophilic substitution (SN2) and SET reactions. A computational analysis of Trx-origin Trxs reduce disulfide bonds through a single-electron transfer reaction (SET), whereas bacterial of Trx catalysis. Enzymes are exceptional catalysts that can accelerate reaction rates by several orders

Berne, Bruce J.

176

Catalysis looks to the future. Panel on new directions in catalytic science and technology  

SciTech Connect (OSTI)

Catalysts play a vital role in providing society with fuels, commodity and fine chemicals, pharmaceuticals, and means for protecting the environment. To be useful, a good catalyst must have a high turnover frequency (activity), produce the right kind of product (selectivity), and have a long life (durability), all at an acceptable cost. Research in the field of catalysis provides the tools and understanding required to facilitate and accelerate the development of improved catalysts and to open opportunities for the discovery of new catalytic processes. The aim of this report is to identify the research opportunities and challenges for catalysis in the coming decades and to detail the resources necessary to ensure steady progress. Chapter 2 discusses opportunities for developing new catalysts to meet the demands of the chemical and fuel industries, and the increasing role of catalysis in environmental protection. The intellectual challenges for advancing the frontiers of catalytic science are outlined in Chapter 3. The human and institutional resources available in the US for carrying out research on catalysis are summarized in Chapter 4. The findings and recommendations of the panel for industry, academe, the national laboratories, and the federal government are presented in Chapter 5.

Not Available

1992-12-31T23:59:59.000Z

177

Computationally Optimized Homogenization Heat Treatment of Metal Alloys  

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

Computationally Optimized Homogenization Heat Computationally Optimized Homogenization Heat Treatment of Metal Alloys Contact NETL Technology Transfer Group techtransfer@netl.doe.gov May 2013 Significance * Reduction in energy consumption and carbon dioxide output due to shorter, more effective heat treatments * Substantially lower processing costs * Ability to optimize the mechanical properties of alloys for improved downstream performance * Adaptable to the constraints of individual production facilities and the level of homogenization desired Applications * Any solid substitutional alloy utilized in a

178

Depleted UF6 Conversion facility EIS Topics  

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

Topics Topics Depleted UF6 Conversion Facility EIS Topics A listing of topics included in the Depleted UF6 Conversion Facility EISs. DOE addressed the following environmental issues when assessing the potential environmental impacts of the alternatives in the two site-specific EISs. DOE solicited comment from the Federal agencies, Native American tribes, state and local governments, and the general public on these and any other issues as part of the public scoping process: Potential impacts on health from DUF6 conversion activities, including potential impacts to workers and the public from exposure to radiation and chemicals during routine and accident conditions for the construction, operation, maintenance, and decontamination and decommissioning of DUF6 conversion facilities.

179

MC-CAM Research Topics Organic LEDs  

E-Print Network [OSTI]

MC-CAM Research Topics Organic LEDs Phosphors and materials for solid state lighting Battery materials with highly- controlled microstructures Next generation optical storage media Products based for advanced display technologies Mitsubishi Chemical Center for Advanced Materials MRL Building University

Bigelow, Stephen

180

Safety Topic: Rota/ng Equipment  

E-Print Network [OSTI]

Safety Topic: Rota/ng Equipment Jus/n Kleingartner #12;Safety protocols 2 #12;Safety protocols for opera/ng a lathe · Don'ts: ­ Do not wear gloves

Cohen, Robert E.

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

Topics in Contemporary Mathematics Instructor: Sam Smith  

E-Print Network [OSTI]

MATH 1171 Topics in Contemporary Mathematics Syllabus Fall 2009 Instructor: Sam Smith Office: Barbelin 212, email smith@sju.edu, x1559 Office Hours: Tue 10:00-11:30, 1:00-2:30,Thur 10

Smith, Sam

182

Spatial homogenization for plate-type critical assemblies. [LMFBR  

SciTech Connect (OSTI)

Standard calculational models of plate-type LMFBR critical assemblies do not explicitly represent individual plates. Instead, detailed plate-by-plate calculations are performed only for each representative cell type, and homogenized cross sections are defined by flux-volume weighting of individual plate cross sections. Subsequent reactor calculations are performed by modeling each cell type with homogenized cross sections. The homogenized cross sections are sensitive to the manner in which the cell leakage is modeled. The intent of this paper is to present a method of representing the cell leakage which results in more accurate homogenized cross sections than the methods presently in use.

Rempe, K.R.; Smith, K.S.

1983-01-01T23:59:59.000Z

183

Tensor Rank and Stochastic Entanglement Catalysis for Multipartite Pure States  

E-Print Network [OSTI]

The tensor rank (also known as generalized Schmidt rank) of multipartite pure states plays an important role in the study of entanglement classifications and transformations. We employ powerful tools from the theory of homogeneous polynomials to investigate the tensor rank of symmetric states such as the tripartite state $\\ket{W_3}=\\tfrac{1}{\\sqrt{3}}(\\ket{100}+\\ket{010}+\\ket{001})$ and its $N$-partite generalization $\\ket{W_N}$. Previous tensor rank estimates are dramatically improved and we show that (i) three copies of $\\ket{W_3}$ has rank either 15 or 16, (ii) two copies of $\\ket{W_N}$ has rank $3N-2$, and (iii) $n$ copies of $\\ket{W_N}$ has rank O(N). A remarkable consequence of these results is that certain multipartite transformations, impossible even probabilistically, can become possible when performed in multiple copy bunches or when assisted by some catalyzing state. This effect is impossible for bipartite pure states.

Lin Chen; Eric Chitambar; Runyao Duan; Zhengfeng Ji; Andreas Winter

2010-11-10T23:59:59.000Z

184

A study of the homogenization of soils  

SciTech Connect (OSTI)

In accordance with US Environmental Protection Agency (US EPA) regulations, areas of land that have been contaminated must be returned to an environmental condition that permits less restrictive forms of use. In anticipation of being listed as an EPA Superfund Site, the United States Department of Energy`s (US DOE) Nevada Test Site (NTS) is evaluating existing the technologies, and supporting the development of new technologies, for the removal of plutonium contaminants from soils. During the 1950s, DOE conducted a series of tests on the NTS wherein attempts were made to detonate nuclear weapons by igniting charges of high explosives packed around the weapons` warheads. While the warheads never achieved criticality, each test disseminated particulate plutonium over several square miles, principally in Area 11 of the NTS.DOE`s Nevada Operations Office has committed to a Plutonium In Soils Integrated Demonstration Project (PuID) to evaluate existing and developmental technologies for the safe removal of plutonium contamination from soils. It is DOE`s intention to provide approximately one ton of Area 11 soil, traced with a non-radioactive plutonium surrogate, to each of several companies with expertise in the removal of soil contaminants. These companies have expressed an interest in contracting with DOE for remediation of NTS soils. DOE wishes to evaluate each company`s process in an unbiased and statistically justifiable manner. For this reason, DOE must provide to each company a large sample of soil for prototype testing. The soil must be homogenized such that the representativeness of each split is well documented and defensible. The process of uniformly mixing large volumes of soil has not been addressed, to our knowledge, in the hydrogeologic, soil science or mining literature. Several mixing devices are currently being evaluated by DOE for use in the PuID. This report describes the results of some initial experimentation with a small cement mixer.

Giovine, L.R.S.; Miller, F.L. Jr.

1993-06-01T23:59:59.000Z

185

TEC Working Group Topic Groups Rail Meeting Summaries | Department of  

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

Rail Meeting Summaries Rail Meeting Summaries TEC Working Group Topic Groups Rail Meeting Summaries MEETING SUMMARIES Kansas City TEC Meeting, Rail Topic Group Summary - July 25, 2007 Atlanta TEC Meeting, Rail Topic Group Summary - March 6, 2007 Green Bay Meeting, Rail Topic Group Summary - October 26, 2006 Washington DC TEC Meeting, Rail Topic Group Summary - March 15, 2006 Pueblo TEC Meeting, Rail Topic Group Summary - September 22, 2005 Phoenix TEC Meeting, Rail Topic Group Summary - April 4, 2005 Minneapolis TEC Meeting, Rail Topic Group Summary - September 21, 2004 Albuquerque TEC Meeting, Rail Topic Group Summary - April 22, 2004 New Orleans TEC Meeting, Rail Topic Group Summary - January 29, 2002 Jacksonville TEC Meeting, Rail Topic Group Summary - January 20, 1999 Milwaukee TEC Meeting, Rail Topic Group Summary - July 13, 1998

186

Physics Topics - Rotating Wall Machine - UW Plasma Physics  

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

Physics Topics UW Madison Line Tied Reconnection Experiment Physics Topics LTRX HomeResearch MissionLTRX DevicePhysics TopicsDiagnosticsLTRX GalleryLTRX People CPLA Home Directory...

187

Synthesis and Optimization of Reversible Circuits for Homogeneous Boolean Functions  

E-Print Network [OSTI]

Homogenous Boolean function is an essential part of any cryptographic system. The ability to construct an optimized reversible circuits for homogeneous Boolean functions might arise the possibility of building cryptographic system on novel computing paradigms such as quantum computers. This paper shows a factorization algorithm to synthesize such circuits.

Ahmed Younes

2007-10-02T23:59:59.000Z

188

DIRECT NUMERICAL SIMULATION OF INTERACTION OF DETONATION WAVE WITH HOMOGENEOUS  

E-Print Network [OSTI]

DIRECT NUMERICAL SIMULATION OF INTERACTION OF DETONATION WAVE WITH HOMOGENEOUS ISOTROPIC TURBULENCE SIMULATION OF INTERACTION OF DETONATION WAVE WITH HOMOGENEOUS ISOTROPIC TURBULENCE HARI NARAYANAN NAGARAJAN The propagation of a shock or detonation wave through a reactive mixture has been the subject of research for over

Texas at Arlington, University of

189

Events & Topics in Renewable Energy & the Environment featuring...  

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

Events & Topics in Renewable Energy & the Environment featuring Chenyang Lu Events & Topics in Renewable Energy & the Environment featuring Chenyang Lu Smart Buildings with...

190

Request for Information (RFI): Clean Energy Manufacturing Topics...  

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

Request for Information (RFI): Clean Energy Manufacturing Topics Suitable for a Manufacturing Innovation Institute Request for Information (RFI): Clean Energy Manufacturing Topics...

191

TEC/WG Tribal Topic Group  

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

TEC Tribal Topic Group Conference Call TEC Tribal Topic Group Conference Call January 18, 2006 Group Chair: Jay Jones (DOE/OCRWM) Participating TEC Tribal Topic Group Members: Rob Burnside (CTUIR), Earl Easton (U.S. NRC), Kristen Ellis (DOE/CI), Ed Gonzales (ELG), Angela Hill (DOE/OCRWM), Marsha Keister (INL), Dan King (Oneida Nation), Corinne Macaluso (DOE/OCRWM), Titto Moses (CTUIR), Stanley Paytiamo (Pueblo of Acoma), Willie Preacher (Shoshone-Bannock Tribes), Cathy Reynolds (DOE/GC), Larry Stern (CVSA), Kevin Tafoya (Santa Clara Pueblo), Neil Weber (Pueblo de San Ildefonso), Andrea Wilkins (NCSL), Sarah Wochos (CSG-MW) DOE support contractors also participated in this call. Action Items: Responsible Party Action to be Taken Jay Jones/Corinne Macaluso/ Email and fax 180(c)-related 2006 Federal Register Notices to Tribal

192

Topic 1: IntroductionTopic 1: Introduction What is a Computer?What is a Computer?  

E-Print Network [OSTI]

Topic 1: IntroductionTopic 1: Introduction 1 What is a Computer?What is a Computer? What is Computer Science?What is Computer Science? How do we Solve Problems with aHow do we Solve Problems with a Computer?Computer? What is a Computer?What is a Computer? 2 What is a Computer?What is a Computer

Stephenson, Ben

193

Microsoft Word - Topic A Requirements _2_  

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

A Requirements A Requirements Topic A, Interconnection-Level Analysis and Planning Topic A awardees must fulfill the following requirements: 1. The work to be performed must cover the entire Interconnection. 2. Analyses and planning must be developed and performed in a transparent and collaborative manner, and the study processes must be open to participation by state and federal officials, representatives from independent system operators (ISOs) and regional transmission organizations (RTOs), utilities, and relevant stakeholder bodies or non-government organizations (NGO's), including appropriate entities in Canada and Mexico. Discuss approach to ensure consensus among stakeholders on key issues. 3. The awardee must establish a multi-constituency steering group that will provide

194

Conformational Diversity and Sub-states in Enzyme Catalysis | ornl.gov  

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

Conformational Diversity and Sub-states in Enzyme Catalysis Conformational Diversity and Sub-states in Enzyme Catalysis November 01, 2013 Enzymes are great biocatalysts, and have attracted significant interest for industrial applications (including cellulosic ethanol) due to their remarkable catalytic efficiencies. The understanding of factors that enable enzymes to achieve the high catalytic efficiency will have large impact through design of new and powerful biocatalysts. Unfortunately, the understanding of these factors have largely remain a mystery so far. Using joint computational-experimental methodology we have developed a unique technique named quasi-anharmonic analysis (QAA) for identification of conformational diversity and conformational sub-states associated with enzyme function. As a result of this approach we have been able to develop

195

Major Successes of Theory-and-Experiment-Combined Studies in Surface Chemistry and Heterogeneous Catalysis.  

SciTech Connect (OSTI)

Experimental discoveries followed by theoretical interpretations that pave the way of further advances by experimentalists is a developing pattern in modern surface chemistry and catalysis. The revolution of modern surface science started with the development of surface-sensitive techniques such as LEED, XPS, AES, ISS and SIMS, in which the close collaboration between experimentalists and theorists led to the quantitative determination of surface structure and composition. The experimental discovery of the chemical activity of surface defects and the trends in the reactivity of transitional metals followed by the explanations from the theoretical studies led to the molecular level understanding of active sites in catalysis. The molecular level knowledge, in turn, provided a guide for experiments to search for new generation of catalysts. These and many other examples of successes in experiment-and-theory-combined studies demonstrate the importance of the collaboration between experimentalists and theorists in the development of modern surface science.

Somorjai, Gabor A.; Li, Yimin

2009-11-21T23:59:59.000Z

196

Hydrogen storage materials and method of making by dry homogenation  

DOE Patents [OSTI]

Dry homogenized metal hydrides, in particular aluminum hydride compounds, as a material for reversible hydrogen storage is provided. The reversible hydrogen storage material comprises a dry homogenized material having transition metal catalytic sites on a metal aluminum hydride compound, or mixtures of metal aluminum hydride compounds. A method of making such reversible hydrogen storage materials by dry doping is also provided and comprises the steps of dry homogenizing metal hydrides by mechanical mixing, such as be crushing or ball milling a powder, of a metal aluminum hydride with a transition metal catalyst. In another aspect of the invention, a method of powering a vehicle apparatus with the reversible hydrogen storage material is provided.

Jensen, Craig M. (Kailua, HI); Zidan, Ragaiy A. (Honolulu, HI)

2002-01-01T23:59:59.000Z

197

Six Hot Topics in Planetary Astronomy  

E-Print Network [OSTI]

Six hot topics in modern planetary astronomy are described: 1) lightcurves and densities of small bodies 2) colors of Kuiper belt objects and the distribution of the ultrared matter 3) spectroscopy and the crystallinity of ice in the outer Solar system 4) irregular satellites of the giant planets 5) the Main Belt Comets and 6) comets and meteor stream parents.

David Jewitt

2008-11-14T23:59:59.000Z

198

Quark-gluon plasma (Selected Topics)  

SciTech Connect (OSTI)

Introductory lectures to the theory of (strongly interacting) quark-gluon plasma given at the Winter School of Physics of ITEP (Moscow, February 2010). We emphasize theoretical issues highlighted by the discovery of the low viscosity of the plasma. The topics include relativistic hydrodynamics, manifestations of chiral anomaly in hydrodynamics, superfluidity, relativistic superfluid hydrodynamics, effective stringy scalars, holographic models of Yang-Mills theories.

Zakharov, V. I., E-mail: vzakharov@itep.ru [Institute for Theoretical and Experimental Physics (Russian Federation)

2012-09-15T23:59:59.000Z

199

A Nuclear Iran? Why this particular topic?  

E-Print Network [OSTI]

A Nuclear Iran? #12;#12;Why this particular topic? · State Department internship · Personal · NPT (Nuclear Nonproliferation Treaty) developed after WWII and Japan · IAEA (International Atomic of capacity #12;Iran's nuclear program · Initiated in 1959 · Strong ties to Russia, China and Pakistan · 2002

New Hampshire, University of

200

Video Topics Include Freshman Inquiry Course  

E-Print Network [OSTI]

Video Topics Include Freshman Inquiry Course Open Advisement/ Group Advisement Dinning Campus: End of Spring 2012, Commencement May 18: Grades available on MAX after 4:30pm AdvisementYouTubeVideoSeries I N S I D E T H I S I S S U E : YouTube Video Series 1 Mark Your Calendar 1 Exploring Major Tips 2

Hardy, Christopher R.

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

TOPIC INTRODUCTION Title page Combining Ca2+  

E-Print Network [OSTI]

1 TOPIC INTRODUCTION Title page Combining Ca2+ Imaging with Other Optical Techniques SHORT TITLE: Ca2+ Imaging and Other Optical Techniques Marco Canepari 1,2 , Dejan Zecevic 4 , Kaspar E Vogt 3 Descartes, 75006 Paris, France Address correspondence to: marco.canepari@ujf-grenoble.fr ABSTRACT Ca2

Paris-Sud XI, Université de

202

Tracking Multiple Topics for Finding Interesting Articles  

SciTech Connect (OSTI)

We introduce multiple topic tracking (MTT) for iScore to better recommend news articles for users with multiple interests and to address changes in user interests over time. As an extension of the basic Rocchio algorithm, traditional topic detection and tracking, and single-pass clustering, MTT maintains multiple interest profiles to identify interesting articles for a specific user given user-feedback. Focusing on only interesting topics enables iScore to discard useless profiles to address changes in user interests and to achieve a balance between resource consumption and classification accuracy. Also by relating a topic's interestingness to an article's interestingness, iScore is able to achieve higher quality results than traditional methods such as the Rocchio algorithm. We identify several operating parameters that work well for MTT. Using the same parameters, we show that MTT alone yields high quality results for recommending interesting articles from several corpora. The inclusion of MTT improves iScore's performance by 9% to 14% in recommending news articles from the Yahoo! News RSS feeds and the TREC11 adaptive filter article collection. And through a small user study, we show that iScore can still perform well when only provided with little user feedback.

Pon, R K; Cardenas, A F; Buttler, D J; Critchlow, T J

2007-02-15T23:59:59.000Z

203

Weeks Lecture Topics Text Reading 1 Introduction  

E-Print Network [OSTI]

Weeks Lecture Topics Text Reading 1 Introduction Measurement and Units Ch 1, Sec 1-6 2 Motion-8 Common Exam 1 Ch. 1 - Ch.3 6 Energy -Work, Kinetic Energy, Work-Energy Theorem Ch. 6, Sec. 1, 3 7 Energy -Potential Energy, Mechanical Energy, Energy conservation, Power Ch. 6, Sec. 4-7, 9, 10 8 Momentum

204

OPTIMIZATION TOPICS LIST Revised April 2012  

E-Print Network [OSTI]

1 OPTIMIZATION TOPICS LIST Revised April 2012 For Fall 2012 and Spring 2013 we will adopt. Bertsimas and J. Tsitsiklis, Introduction to Linear Optimization, Athena Scientific, 1997 2. M. C. Ferris, O and mixed integer models · Existence of optimal solutions, optimality conditions · Branch and bound methods

Radeloff, Volker C.

205

TOPICS IN PHILOSOPHY OF RELIGION: PHENOMENOLOGY  

E-Print Network [OSTI]

1 TOPICS IN PHILOSOPHY OF RELIGION: PHENOMENOLOGY RELS 4700/6700 & PHIL 4690/6690 Instructor introduction to phenomenology with a particular focus on phenomenology of religion. We will be concerned with phenomenology as a philosophical movement beginning with Husserl and continuing to the present that makes claims

Doyle, Robert

206

Impact of catalysis on the production of the top 50 US commodity chemicals  

SciTech Connect (OSTI)

Information on each chemical is stored in an accompanying Excel{trademark} 4.0 spreadsheet (``top5Ochem.xcl``). This analysis tool allows the user to make assumptions about process yield improvements and evaluate the corresponding impact on the process and feedstock energy. Many scenarios have been investigated and are reported in the text. If all of the catalytic processes associated with the top 50 chemicals were raised to their maximum process yields, the corresponding process and feedstock energy savings would exceed 0.47 quads per year. More realistic process yield improvements of 1%, 5%, and 10% where possible, would save 0.03, 0.14, and 0.23 quads per year. Many of the commodity chemicals face limitations from both the current catalyst and process. Catalysis is vital, but catalysis alone is not the answer to maximizing energy savings. Integration of catalysis development with process engineering research can lead to significant energy savings during the production of the top 50 chemicals.

Tonkovich, A.L.Y.

1994-03-01T23:59:59.000Z

207

NMR Computational Studies of Solid Acidity/Fundamental Studies of Catalysis by Solid Acids  

SciTech Connect (OSTI)

This project focused on catalysis by zeolites and the synergy of spectroscopic characterization and theoretical modeling. In collaboration with the Waroquier group in Belgium we used state-of-the-art quantum chemical simulations on a supramolecular model of both the HZSM-5 zeolite and the co-catalytic hydrocarbon pool species and calculated a full catalytic cycle (including all rate constants) for methanol-to-olefin (MTO) catalysis involving a hydrocarbon pool species. This work not only represents the most robust computational analysis of a successful MTO route to date, but it also succeeds in tying together the many experimental clues. That work was featured on the cover of Angewandte Chemie. More recently we elucidated several unsuspected roles for formaldehyde in methanol to olefin catalysis. Formaldehyde proves to be a key species responsible for both the growth of the catalytically active hydrocarbon pool and its inevitable aging into deactivated polycyclic aromatic species. The apparent inevitability of formaldehyde formation at high temperatures, in particular in contact with active metal or metal oxide surfaces, may put some fundamental limitations on the economic potential of conversion of methanol to olefins.

James F. Haw

2008-06-28T23:59:59.000Z

208

One-Directional Perfect Cloak Created With Homogeneous Material  

E-Print Network [OSTI]

A one-directional invisibility cloak is presented in this letter. Perfect invisibility can be achieved for TM waves along certain directions. The parameters are just homogeneously anisotropic and relatively easy for practical ...

Xi, Sheng

209

Homogeneous vs Heterogeneous Clustered Sensor Networks: A Comparative Study  

E-Print Network [OSTI]

1 Homogeneous vs Heterogeneous Clustered Sensor Networks: A Comparative Study Vivek Mhatre elected, serve for the entire lifetime of the network) in a homoge- neous network, it is evident

Rosenberg, Catherine P.

210

Molecular Dynamics Simulation of Homogeneous Crystal Nucleation in Polyethylene  

E-Print Network [OSTI]

Using a realistic united-atom force field, molecular dynamics simulations were performed to study homogeneous nucleation of the crystal phase at about 30% supercooling from the melts of n-pentacontahectane (C150) and a ...

Yi, Peng

211

Impurities in a Homogeneous Electron Gas Jung-Hwan Song  

E-Print Network [OSTI]

Electron Gas Abstract approved: Henri J. F. Jansen Immersion energies for an impurity in a homogeneous. Jansen, who has been a most important contributor to this thesis, and gave me guidelines and helps

Jansen, Henri J. F.

212

Fuel effects in homogeneous charge compression ignition (HCCI) engines  

E-Print Network [OSTI]

Homogenous-charge, compression-ignition (HCCI) combustion is a new method of burning fuel in internal combustion (IC) engines. In an HCCI engine, the fuel and air are premixed prior to combustion, like in a spark-ignition ...

Angelos, John P. (John Phillip)

2009-01-01T23:59:59.000Z

213

Topic 1: IntroductionTopic 1: Introduction What is a Computer?What is a Computer?  

E-Print Network [OSTI]

Topic 1: IntroductionTopic 1: Introduction 1 What is a Computer?What is a Computer? What is Computer Science?What is Computer Science? How do we Solve Problems with aHow do we Solve Problems with a Computer?Computer? #12;What is a Computer?What is a Computer? 2 #12;What is a Computer?What is a Computer

Stephenson, Ben

214

Low-Temperature Hydrocarbon/CO Oxidation Catalysis in Support of HCCI Emission Control  

Broader source: Energy.gov [DOE]

Development of catalyst materials to facilitate the low-temperature oxidation of hydrocarbons and CO in homogeneous charge compression ignition (HCCI) emissions.

215

TEC/WG Tribal Topic Group  

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

Conference Call Conference Call December 6, 2005 Group Chair: Jay Jones (DOE/OCRWM) Participating TEC Tribal Topic Group Members: Kevin Clarke (DOE/RL), Kristen Ellis (DOE/CI), Lisa Gover (NTEC), Dan King (Oneida Nation), Corinne Macaluso (DOE/OCRWM), Ellen Ott (DOE/GC), Ted Repasky (CTUIR), Cathy Reynolds (DOE/GC), Lisa Sattler (CSG-MW) Herman Shorty (Navajo Nation), Linda Sikkema (NCSL), Christopher Wells (SSEB) DOE support contractors also participated in this call. Action Items: Responsible Party Action to be Taken Wilda Portner Email potential conference call dates to Tribal representatives who are members of the Topic Group. Ask for their input on which of 2 or 3 dates are the most convenient for the call. Follow up emails with faxes and phone calls as necessary.

216

Top Topics and Achievements by Site  

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

Topics and Topics and Accomplishments EM Site-Specific Advisory Board EM Site-Specific Advisory Board Chairs' Meeting October 2-3, 2012 Savannah River  Issue: Salt Waste Processing Facility  CAB understands some schedule and funding issues may be brewing.  DOE has internal assessment underway.  Delays could have dramatic impact on overall Site Closure schedule and Process.  While this is early in process we do have concerns. Savannah River  Issue (April 2012): Receipt of Research Reactor Spent Nuclear Fuel and Long Term Storage of Existing Inventories with no known, approved disposition path  Processing of SNF In H-Canyon was once considered viable.  SNF processing in H-Canyon seems to no longer be the preferred

217

Microsoft Word - topic_B_TI  

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

Input Regarding Electric Resource and Transmission Planning in the Texas Input Regarding Electric Resource and Transmission Planning in the Texas Interconnection The awardee must complete the following at a minimum: 1. Studies, if needed, to analyze issues related to reliable integration of variable renewables into the Texas Interconnection, availability of baseload renewables and other low-carbon resources as well as any other studies that the awardee feels are needed to better enable participation in interconnection-wide analyses and planning. 2. Develop other policy inputs as needed to go into the interconnection-level analyses prepared under Topic A. 3. Participate in the development and updates of the long-term interconnection-level plan under Topic A., paragraph 4. Provide insight into the economic and

218

EIA - International Energy Outlook 2007 - Special Topics  

Gasoline and Diesel Fuel Update (EIA)

> Special Topics > Special Topics International Energy Outlook 2007 World GDP: Potential Impacts of High and Low Oil Prices Differences from Reference Case World Oil Price Projections in the High and Low World Oil Price Cases, 2006-2030 (Percent). Need help, contact the National Energy Information Center at 202-586-8800. Figure Data Differences from Reference Case World Real GDP Projections in the High and Low World Oil Price Cases, 2006-2030 (Percent). Need help, contact the National Energy Information Center at 202-586-8800. Figure Data Price paths in the IEO2007 high and low world oil price cases are not characterized by disruption but rather represent sustained movements relative to the reference case oil price path. The assumptions behind the oil price cases are that the price changes do not come as a shock and that

219

International Energy Outlook 2006 - Special Topics  

Gasoline and Diesel Fuel Update (EIA)

Special Topics Special Topics International Energy Outlook 2006 World Oil Prices in IEO2006 World Oil Prices, 1980-2030: Comparison of IRAC and Average Price of Imported Low-Sulfur, Light Crude Oil (ILSLCO) to U.S. Refiners (2004 Dollars per Barrel). Need help, contact the National Energy Information Center at 202-586-8800. Figure Data In previous IEOs, the world crude oil price was defined on the basis of the average imported refiner acquisition cost of crude oil to the United States (IRAC), which represented the weighted average of all imported crude oil. Historically, the IRAC price has tended to be a few dollars less than the widely cited prices of premium crudes, such as West Texas Intermediate (WTI) and Brent, which refiners generally prefer for their low viscosity

220

Renewable Energy Project Development: Advanced Process Topics  

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

Process Topics Process Topics Understanding Energy Markets, Project Scale Decision Factors, Procurement Options, and the Role of the Project Team Course Outline What we will cover...  About the DOE Office of Indian Energy Education Initiative  Processes for Developing Renewable Energy Projects on Tribal Lands - Understanding the Energy Market and Project Scale - Project Scale and Ownership Options - Procurement Process - Project Team  Additional Information and Resources 2 Introduction The U.S. Department of Energy (DOE) Office of Indian Energy Policy and Programs is responsible for assisting Tribes with energy planning and development, infrastructure, energy costs, and electrification of Indian lands and homes. As part of this commitment and on behalf of DOE,

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

Renewable Energy Project Development: Advanced Concept Topics  

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

Concept Topics Concept Topics An Introduction to Risk, Tribal Roles, and Support Policies in the Renewable Energy Project Development Process Course Outline What we will cover...  About the DOE Office of Indian Energy Education Initiative  Concepts and Policies for Understanding Renewable Energy Projects on Tribal Lands - Risk and Uncertainty - Tribal Project Roles - Policies and Incentives  Additional Information and Resources 2 Introduction The U.S. Department of Energy (DOE) Office of Indian Energy Policy and Programs is responsible for assisting Tribes with energy planning and development, infrastructure, energy costs, and electrification of Indian lands and homes. As part of this commitment and on behalf of DOE, the Office of Indian Energy is leading education

222

Environmental Topics in an Undergraduate Physics Curriculum  

Science Journals Connector (OSTI)

The number of bachelor's degrees in physics conferred annually is predicted to decline. This decline may be abated by emphasizing the versatility of an undergraduatephysics degree. The introduction of environmental topics throughout the undergraduate curriculum is one method of illustrating this flexibility and this approach is presented. Examples of the applications of physical principles to several areas of environmental change are given. These areas are air pollution energy conversion and resources environmental radiation noise thermal pollution transportation and water pollution. Representative bibliographies are presented in each area to facilitate the introduction of these topics into the curriculum. For the most part items in the bibliography refer to environmental problems that are amenable to the laws of physics. No major changes are proposed for the standard undergraduatephysics curriculum although a course in fluid mechanics or transport phenomena would provide a valuable background for students of all interests.

David J. Cowan

1972-01-01T23:59:59.000Z

223

Tracking Multiple Topics for Finding Interesting Articles  

SciTech Connect (OSTI)

We introduce multiple topic tracking (MTT) for iScore to better recommend news articles for users with multiple interests and to address changes in user interests over time. As an extension of the basic Rocchio algorithm, traditional topic detection and tracking, and single-pass clustering, MTT maintains multiple interest profiles to identify interesting articles for a specific user given user-feedback. Focusing on only interesting topics enables iScore to discard useless profiles to address changes in user interests and to achieve a balance between resource consumption and classification accuracy. iScore is able to achieve higher quality results than traditional methods such as the Rocchio algorithm. We identify several operating parameters that work well for MTT. Using the same parameters, we show that MTT alone yields high quality results for recommending interesting articles from several corpora. The inclusion of MTT improves iScore's performance by 25% in recommending news articles from the Yahoo! News RSS feeds and the TREC11 adaptive filter article collection. And through a small user study, we show that iScore can still perform well when only provided with little user feedback.

Pon, R K; Cardenas, A F; Buttler, D J; Critchlow, T J

2008-01-03T23:59:59.000Z

224

Existence of homogeneous vectors on the fiber space of the tangent bundle  

Science Journals Connector (OSTI)

Let M = G/K be a homogeneous differentiable manifold. We consider the homogeneous bundle $$ \\Im $$ = (G, ?, G/K, K) ...

R. Chavosh Khatamy; M. Toomanian

2007-09-01T23:59:59.000Z

225

Regularity lifting of weak solutions for nonlinear sub-Laplace equations on homogeneous groups  

Science Journals Connector (OSTI)

Let G be a homogeneous group, and let X 1, X 2, … , X m be left invariant real vector fields being homogeneous of degree one on

Xiaojing Feng; Pengcheng Niu

2012-04-01T23:59:59.000Z

226

TEC Working Group Topic Groups Tribal Meeting Summaries | Department of  

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

Meeting Summaries Meeting Summaries TEC Working Group Topic Groups Tribal Meeting Summaries Meeting Summaries Kansas City TEC Meeting - Tribal Group Summary - July 25, 2007 Atlanta TEC Meeting - Tribal Group Summary - March 6, 2007 Green Bay TEC Meeting -- Tribal Group Summary - October 26, 2006 Washington TEC Meeting - Tribal Topic Group Summary - March 14, 2006 Pueblo TEC Meeting - Tribal Topic Group Summary, September 22, 2005 Phoenix TEC Meeting - Tribal Topic Group Summary - April 4, 2005 Albuquerque TEC Meeting - Tribal Topic Group Presentation - April 21, 2004 New Orleans TEC Meeting - Tribal Topic Group Summary - January 29, 2002 Portland TEC Meeting, Tribal Topic Group Summary - February 6, 2001 Philadelphia TEC Meeting, Tribal Topic Group Summary - July 13, 1999

227

18th Topical Conference High-Temperature Plasma Diagnostics ...  

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

May 16, 2010, 9:00am to May 20, 2010, 5:00pm Conference Wildwood, New Jersey 18th Topical Conference High-Temperature Plasma Diagnostics (HTPD) The 18th Topical Conference on...

228

Functional Networks of Organic and Coordination Polymers: Catalysis of Fructose Conversion  

Science Journals Connector (OSTI)

All chemicals and solvents used were obtained from Sigma-Aldrich Chemical Co. and were of the highest purity available. ... To elucidate the utility of the stable, porous and functional composite materials developed in this work, we focused on the heterogeneous catalysis of the conversion of a biosourced substrate, fructose, into 5-hydroxymethylfurfural (HMF), one of the most important platform molecules for, for example, liquid biofuel and polyester production (SI Figure S10). ... Physical Chemistry Chemical Physics (2012), 14 (40), 13914-13917 CODEN: PPCPFQ; ISSN:1463-9076. ...

Lev Bromberg; Xiao Su; T. Alan Hatton

2014-10-23T23:59:59.000Z

229

Catalysis and activation of magic states in fault-tolerant architectures  

SciTech Connect (OSTI)

In many architectures for fault-tolerant quantum computing universality is achieved by a combination of Clifford group unitary operators and preparation of suitable nonstabilizer states, the so-called magic states. Universality is possible even for some fairly noisy nonstabilizer states, as distillation can convert many noisy copies into fewer purer magic states. Here we propose protocols that exploit multiple species of magic states in surprising ways. These protocols provide examples of previously unobserved phenomena that are analogous to catalysis and activation well known in entanglement theory.

Campbell, Earl T. [Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT (United Kingdom) and Institute of Physics and Astronomy, University of Potsdam, D-14476 Potsdam (Germany)

2011-03-15T23:59:59.000Z

230

Chromomagnetic catalysis of color superconductivity in a (2+1)-dimensional Nambu–Jona-Lasinio model  

Science Journals Connector (OSTI)

We investigate the influence of a constant uniform external chromomagnetic field H on the formation of color superconductivity. The consideration is made in the framework of a (2+1)-dimensional Nambu–Jona-Lasinio model with two different four-fermionic structures responsible for ?q¯q? and diquark ?qq? condensates. In particular, it is shown that there exists a critical value Hc of the external chromomagnetic field such that at H>Hc a nonvanishing diquark condensate is dynamically created (the so-called chromomagnetic catalysis effect of color superconductivity). Moreover, external chromomagnetic fields may in some cases enhance the diquark condensate of color superconductivity.

D. Ebert, K. G. Klimenko, and H. Toki

2001-06-13T23:59:59.000Z

231

Collaboration Topics - System Software | National Nuclear Security  

National Nuclear Security Administration (NNSA)

System Software | National Nuclear Security System Software | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog The National Nuclear Security Administration Collaboration Topics - System Software Home > About Us > Our Programs > Defense Programs > Future Science & Technology Programs > Office of Advanced Simulation and Computing and

232

Topic A Awardee: Eastern Interconnection Planning Collaborative |  

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

A Awardee: Eastern Interconnection Planning A Awardee: Eastern Interconnection Planning Collaborative Topic A Awardee: Eastern Interconnection Planning Collaborative Eastern Interconnection Planning Collaborative The Eastern Interconnection Planning Collaborative (EIPC) was initiated by a coalition of regional Planning Authorities. These Planning Authorities are entities listed on the NERC compliance registry as Planning Authorities and represent the entire Eastern Interconnection. The EIPC was founded to be a broad-based, transparent collaborative process among all interested stakeholders: State and Federal policy makers Consumer and environmental interests Transmission Planning Authorities Market participants generating, transmitting or consuming electricity within the Eastern Interconnection. The EIPC will provide a grass-roots approach which builds upon the regional

233

On the Mechanical Interaction of Light With Homogeneous Liquids  

E-Print Network [OSTI]

We investigate one of the consequences of the three competing models describing the mechanical interaction of light with a dielectric medium. According to both the Abraham and Minkowski models the time-averaged force density is zero inside a homogeneous dielectric, whereas the induced-current Lorentz force model predicts a non-zero force density. We argue that the latter force, if exists, could drive a hydrodynamic flow inside a homogeneous fluid. Our numerical experiments show that such flows have distinct spatial patterns and may influence the dynamics of particles in a water-based single-beam optical trap.

de Reus, Michiel

2013-01-01T23:59:59.000Z

234

Development of homogeneous mobile robots for box-pushing problem  

Science Journals Connector (OSTI)

This paper describes the development of a pair of homogeneous mobile robot using AT89C51 microcontroller with two 6V DC motors to address the box-pushing problem. In this work, two homogeneous mobile robots have been fully developed exclusively to address the box-pushing application that is described as ''Pushing a box-like solid item to reach the goal position already defined by more than one mobile robot through the cooperation among them''. Teaching the mobile robots using reinforcement learning is easier, because of specifying a reward function for every task completed by them.

C. Paramasivam; T. Sornakumar

2009-01-01T23:59:59.000Z

235

Orthogonality of Homogeneous geodesics on the tangent bundle  

E-Print Network [OSTI]

Let $\\xi=(G\\times_{K} \\mathcal{G} / \\mathcal{K}, \\rho_{\\xi}, \\emph{G} / \\emph{K},\\mathcal{G} / \\mathcal{K})$ be the associated bundle and $\\tau_{G/K}=(T_{G/K},\\pi_{G/K},G/K, \\textrm{R}^{m})$ be the tangent bundle of special examples of odd dimension solvable Lie groups equipped with left invariant Riemannian metric. In this paper we prove some conditions about the existence of homogeneous geodesic on the base space of $\\tau_{G/K}$ and homogeneous (geodesic) vectors on the fiber space of $\\xi$ .

Khatamy, R Chavosh

2011-01-01T23:59:59.000Z

236

SBIR and STTR: Topics, FY 2015 Phase I Release 2  

Office of Energy Efficiency and Renewable Energy (EERE)

Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) Programs: Topics, FY 2015, Phase I, Release 2.

237

TOPIC Brief BUILDING TECHNOLOGIES PROGRAM Choosing an Energy Code Compliance Path TOPIC BRIEF 1  

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

Choosing an Energy Code Compliance Path TOPIC BRIEF 1 Choosing an Energy Code Compliance Path TOPIC BRIEF 1 Choosing an Energy Code Compliance Path One challenge that awaits any building designer is choosing the appropriate compliance path through the applicable building energy code. This is not a trivial decision-energy codes are marvels of flexibility, offering multiple compliance paths to suit all types of designers. E ach path has its own pluses and minuses, which may include differences in stringency, complexity, and potentially even limitations on building designs. This topic brief focuses on the compliance paths that are available in the following model codes and standards: * 2009 International Energy Conservation Code (IECC) and 2012

238

Topic initiator detection on the world wide web  

Science Journals Connector (OSTI)

In this paper we introduce a new Web mining and search technique - Topic Initiator Detection (TID) on the Web. Given a topic query on the Internet and the resulting collection of time-stamped web documents which contain the query keywords, the task of ... Keywords: information retrieval, ranking, topic initiator, web mining

Xin Jin; Scott Spangler; Rui Ma; Jiawei Han

2010-04-01T23:59:59.000Z

239

Human versus Machine in the Topic Distillation Task Mingfang Wu  

E-Print Network [OSTI]

Human versus Machine in the Topic Distillation Task Mingfang Wu 1 , Gheorghe Muresan2 , Alistair Mc. The focus is on comparing humans and machine algorithms in terms of performance in a topic distillation task demonstrated that machines can perform nearly as well as people on the topic distillation task. Given a system

Wu, Mingfang

240

Topics in Biomedical Optics: introduction to the feature issue  

E-Print Network [OSTI]

Topics in Biomedical Optics: introduction to the feature issue Joseph P. Culver,1, * Wolfgang; accepted 25 March 2009; posted 25 March 2009 (Doc. ID 109253); published 30 March 2009 This Applied Optics feature issue on Topics in Biomedical Optics highlights papers presented at the 2008 Biomedical Topical

Larson-Prior, Linda

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

Topic Segmentation with Hybrid Document Indexing Irina Matveeva  

E-Print Network [OSTI]

Topic Segmentation with Hybrid Document Indexing Irina Matveeva Department of Computer Science-independent unsuper- vised topic segmentation approach based on hybrid document indexing. Lexical chains have been news, addressed by the Topic Detection and Track- ing (TDT) evaluation project (Wayne, 2000; Allan

Levow, Gina-Anne

242

MESOSCALE MODELLING OF WIND ENERGY OVER NON-HOMOGENEOUS TERRAIN  

E-Print Network [OSTI]

MESOSCALE MODELLING OF WIND ENERGY OVER NON-HOMOGENEOUS TERRAIN (ReviewArticle) Y. MAHRER.1. OBSERVATIONALAPPROACHES Evaluations of wind energy based on wind observations (usually surface winds) at well, the resolution of the wind energy pattern throughout an extended area by this methodology requires a large number

Pielke, Roger A.

243

Framework for Statistical Analysis of Homogeneous Multicore Power Grid Networks  

E-Print Network [OSTI]

Framework for Statistical Analysis of Homogeneous Multicore Power Grid Networks Guanglei Liu the feasibility of such a framework. 1 Index Terms ­ Multicore, Power Grid Network, Statistical Analysis, Process voltage. It has become the number one concern in the design of multicore power grid network. Due

Fan, Jeffrey

244

A CHARACTERIZATION OF HOMOGENEOUS SPACES WITH POSITIVE HYPERBOLIC RANK  

E-Print Network [OSTI]

A CHARACTERIZATION OF HOMOGENEOUS SPACES WITH POSITIVE HYPERBOLIC RANK CHRISTOPHER CONNELL Abstract to be a rank one symmetric space. In particular, we show rigidity if such a space has positive hyperbolic rank greater than equal to that of its "abelian direction." The notion of hyperbolic-rank extends the notion

Connell, Christopher

245

Remarks on an homogeneous model of ocean circulation.  

E-Print Network [OSTI]

Remarks on an homogeneous model of ocean circulation. T. Colin CEA, Centre d'´etudes de Limeil-Valenton, 94195 Villeneuve Saint-Georges Cedex, France. Abstract : We consider a simplified model of ocean relation. This singular limit implies the existence of boundary layers that correspond to currents

Colin, Thierry

246

Hopf Bifurcation and Oscillations in Homogeneous Communication Networks  

E-Print Network [OSTI]

Hopf Bifurcation and Oscillations in Homogeneous Communication Networks Huibing Yin Paul Wang and Engineering, University of Illinois at Urbana-Champaign, 1206 W. Green Street, Urbana, IL 61801. yin3,paulwang: In this paper, we investigate stability and bifurcation arising in a communication network model with a large

Alpcan, Tansu

247

Homogeneous bubble nucleation in rhyolitic melt: Experiments and nonclassical theory  

E-Print Network [OSTI]

Homogeneous bubble nucleation in rhyolitic melt: Experiments and nonclassical theory H. M eruptions. The first and most critical step in degassing is the nucleation of gas bubbles, which requires inferred from bubble nucleation experiments in silicate melts are, however, lower than direct macroscopic

Gonnermann, Helge

248

HOMOGENEOUS MODELS IN GENERAL RELATIVITY AND GAS DYNAMICS  

E-Print Network [OSTI]

HOMOGENEOUS MODELS IN GENERAL RELATIVITY AND GAS DYNAMICS O. I. BOGOYAVLENSKII AND S. P. NOVIKOV analytically) in general relativity and gas dynamics. The investigation of these models is carried out begins with a short survey of results on non-trivial models (that is, those that are not integrable

Novikov, Sergei Petrovich

249

Forensic Tracking and Surveillance Algorithms for Homogeneous and Heterogeneous Settings  

E-Print Network [OSTI]

Forensic Tracking and Surveillance Algorithms for Homogeneous and Heterogeneous Settings Submitted-Kuwari) Date: #12;"I cannot succeed except through God" #12;Abstract Digital forensics is an emerging field. Traditionally, digital forensics has been confined to the extraction of digital evidence from electronic devices

Sheldon, Nathan D.

250

TEC Working Group Topic Groups | Department of Energy  

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

Topic Groups Topic Groups TEC Working Group Topic Groups TEC Topic Groups were formed in 1991 following an evaluation of the TEC program. Interested members, DOE and other federal agency staff meet to examine specific issues related to radioactive materials transportation. TEC Topic Groups enable a small number of participants to focus intensively on key issues at a level of detail that is unattainable during the TEC semiannual meetings due to time and group size constraints. Topic Groups meet individually by phone and email between TEC's semiannual general meetings, participate in conference calls and report back to the Department and TEC members. The Topic Groups are intended to work on significant issues, produce a relevant product and sunset the group when the work is

251

Interconnection-Wide Transmission Planning Initiative: Topic A,  

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

Interconnection-Wide Transmission Planning Initiative: Topic A, Interconnection-Wide Transmission Planning Initiative: Topic A, Interconnection-Level Analysis and Planning Interconnection-Wide Transmission Planning Initiative: Topic A, Interconnection-Level Analysis and Planning A description of the requirements for Topic A for all Interconnections under the Interconnection-Wide Transmission Planning Initiative, part of the American Recovery and Reinvestment Act. Interconnection-Wide Transmission Planning Initiative: Topic A, Interconnection-Level Analysis and Planning More Documents & Publications Microsoft Word - yDE-FOA-0000068.rtf Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation Among States in the Eastern Interconnection on Electric Resource Planning and Priorities Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation

252

TEC/WG Tribal Topic Group  

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

April 4, 2005 - Phoenix, AZ April 4, 2005 - Phoenix, AZ Group Chair: Jay Jones (DOE/OCRWM) Tribal Topic Group Members Present: Nancy Bennett (UNM/ATRI), Kevin Blackwell (DOT/FRA), Kristen Ellis (DOE/CI), Ed Gonzales (ELG), Elizabeth Helvey (BSC), Jeff Hepting (Pueblo of Acoma), Robert Holden (NCAI), Judith Holm (DOE/OCRWM), Dan King (Oneida Nation), Gary Lanthrum (DOE/OCRWM), Bob Lupton (DOE/ORD/IR), Corinne Macaluso (DOE/OCRWM), Ellen Ott (DOE/GC), Jennifer Patric (BAH), Stanley Paytiamo (Pueblo of Acoma), Wilda Portner (SAIC), Willie Preacher (Shoshone-Bannock Tribes), Herman Shorty (Navajo Nation), Linda Sikkema (NCSL), Larry Stern (CVSA), Neil Weber (Pueblo of San Ildefonso), Christopher Wells (SSEB), Stephen White (NAEMT), Andrea Wilkins (NCSL), Corina Williams (Oneida Nation) (NOTE: Other

253

TOPIC Brief BUILDING TECHNOLOGIES PROGRAM Additional Efficiency  

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

Additional Efficiency Additional Efficiency Package Options in the 2012 IECC Commercial Provisions TOPIC BRIEF 1 Additional Efficiency Package Options in the 2012 IECC Commercial Provisions Section C406, Additional Efficiency Package Options, is a new requirement that appears in the 2012 International Energy Conservation Code (IECC) commercial provisions. Section C406 provides three sets of provisions, one of which must be applied. T his section is intended to achieve additional energy efficiency in commercial buildings designed to meet the 2012 IECC while at the same time providing flexibility to the designer in terms of how that energy efficiency is achieved. Designers may choose to include more efficient HVAC equipment than required by the rest of the 2012 IECC, more

254

TEC/WG Tribal Topic Group  

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

March 9, 2005 March 9, 2005 Participants: Vicki Best (BSC), Kevin Clarke (DOE/RL), Sandi Covi (UPR), Kristen Ellis (DOE/CI), Greg Fasano (BSC), Ed Gonzales (ELG), Jay Jones (DOE/OCRWM), Dan King (Oneida Nation), Bob Lupton (DOE/YMPO), Corinne Macaluso (DOE/OCRWM), Ellen Ott (DOE/GC), Jennifer Patric (BAH), Wilda Portner (SAIC), Lisa Sattler (CSG/MW), Neil Weber (Pueblo of San Ildefonso), Steve White (NAEMT), Andrea Wilkins (NCSL) Jay Jones (DOE/OCRWM) chaired the call. Action Items: Responsible Party Action to be Taken C. Macaluso/J. Jones/W. Portner Send HMEP information to Topic Group. J. Jones Check with FRA (Kevin Blackwell) about addressing Group on April 4 regarding rail inspection program. J. Jones/W. Portner Send agenda for April 4 meeting to Group.

255

TEC/WG Tribal Topic Group  

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

Meeting Meeting September 22, 2005 - Pueblo, CO Group Chair: Jay Jones (DOE/OCRWM) Tribal Topic Group Members Present: Richard Arnold (Southern Paiute/CGTO), Vicki Best (Bechtel SAIC-YMP), Kevin Blackwell (DOT/FRA), Sandra Covi (UPRR), Barbara Durham (Timbisha Shoshone Tribe), Greg Fasano (Bechtel SAIC-YMP), Elizabeth Helvey (BSC), Angela Hill (DOE/OCRWM), Judith Holm (DOE/OCRWM), Marsha Keister (INL), Dan King (Oneida Nation), Gary Lanthrum (DOE/OCRWM), Corinne Macaluso (DOE/OCRWM), Calvin Meyers (Moapa Band of Paiutes), Michele Titto Moses (CTUIR), Ellen Ott (DOE/GC), Wilda Portner (SAIC), Willie Preacher (Shoshone-Bannock Tribes), Linda Sikkema (NCSL), Lora Tom (Paiute Indian Tribe of Utah), Christopher Wells (SSEB), Edward Wilds (CT Dept. of Environmental

256

Channeling of Fusion Alpha-Particle Power Using Minority Ion Catalysis A. I. Zhmoginov and N. J. Fisch  

E-Print Network [OSTI]

, with electrons kept cold, so that the effective fusion reactivity can be increased [9­11]. The meansChanneling of Fusion Alpha-Particle Power Using Minority Ion Catalysis A. I. Zhmoginov and N. J greatly facilitate controlled nuclear fusion. The parameter range for achieving this temperature disparity

257

Decarboxylative Arylation of Amino Acids via Photoredox Catalysis: A One-Step Conversion of Biomass to Drug  

E-Print Network [OSTI]

Decarboxylative Arylation of Amino Acids via Photoredox Catalysis: A One-Step Conversion of Biomass. This method offers rapid entry to prevalent benzylic amine architectures from an abundant biomass the worldwide abundance of biomass6 that incorporates carboxylate functionality (e.g., amino acids, -hydroxy

MacMillan, David W. C.

258

Chemoselective SN2? reaction of nitroalkanes to dialkyl 2-(bromomethyl)fumarates under cetyltrimethylammonium hydroxide (CTAOH) catalysis  

Science Journals Connector (OSTI)

The chemoselective SN2? reaction of a variety of primary nitroalkanes to dialkyl 2-(bromomethyl)fumarates can be efficiently performed under cetyltrimethylammonium hydroxide (CTAOH) catalysis. The ?,?-unsaturated esters were obtained in satisfactory to good yields with the complete retention of the nitro group.

Roberto Ballini; Serena Gabrielli; Alessandro Palmieri

2010-01-01T23:59:59.000Z

259

Homogeneous nucleation rate measurements in supersaturated water vapor  

Science Journals Connector (OSTI)

The rate of homogeneous nucleation in supersaturated vapors of water was studied experimentally using a thermal diffusion cloud chamber. Helium was used as a carrier gas. Our study covers a range of nucleation rates from 3 × 10 ? 1 to 3 × 10 2 cm ? 3 s ? 1 at four isotherms: 290 300 310 and 320 K . The molecular content of critical clusters was estimated from the slopes of experimental data. The measured isothermal dependencies of nucleation rate of water on saturation ratio were compared with the prediction of the classical theory of homogeneous nucleation the empirical prediction of Wölk et al. [J. Chem. Phys.117 10 (2002)] the scaled model of Hale [Phys. Rev. A33 4156 (1986)] and the former nucleation onset data.

David Brus; Vladimír Ždímal; Ji?í Smolík

2008-01-01T23:59:59.000Z

260

High load operation in a homogeneous charge compression ignition engine  

DOE Patents [OSTI]

A homogeneous charge compression ignition engine is set up by first identifying combinations of compression ratio and exhaust gas percentages for each speed and load across the engines operating range. These identified ratios and exhaust gas percentages can then be converted into geometric compression ratio controller settings and exhaust gas recirculation rate controller settings that are mapped against speed and load, and made available to the electronic

Duffy, Kevin P. (Metamora, IL); Kieser, Andrew J. (Morton, IL); Liechty, Michael P. (Chillicothe, IL); Hardy, William L. (Peoria, IL); Rodman, Anthony (Chillicothe, IL); Hergart, Carl-Anders (Peoria, IL)

2008-12-23T23:59:59.000Z

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

Invariant Properties of Straight Homogeneous Generalized Cylinders and Their Contours  

Science Journals Connector (OSTI)

A fundamental group in computer vision is the recovery of three-dimensional shape from image data. While this problem is in general underconstrained, the authors show that it can be simplified in the case where the objects being viewed are generalized ... Keywords: 3D shape recovery, Gaussian curvature, computer vision, computerised pattern recognition, computerised picture processing, image contours, invariant property, segmentation, straight homogeneous generalized cylinders

J. Ponce; D. Chelberg; W. B. Mann

1989-09-01T23:59:59.000Z

262

Design, Synthesis and Mechanistic Evaluation of Iron-Based Catalysis for Synthesis Gas Conversion to Fuels and Chemicals  

SciTech Connect (OSTI)

This project extends previously discovered Fe-based catalysts to hydrogen-poor synthesis gas streams derived from coal and biomass sources. These catalysts have shown unprecedented Fischer-Tropsch synthesis rates and selectivities for synthesis gas derived from methane. During the first reporting period, we certified a microreactor, installed required analytical equipment, and reproduced synthetic protocols and catalytic results previously reported. During the second reporting period, we prepared several Fe-based compositions for Fischer-Tropsch Synthesis and tested the effects of product recycle under both subcritical and supercritical conditions. During the third and fourth reporting periods, we improved the catalysts preparation method, which led to Fe-based materials with the highest FTS reaction rates and selectivities so far reported, a finding that allowed their operation at lower temperatures and pressures with high selectivity to desired products (C{sub 5+}, olefins). During the fifth and sixth reporting period, we studied the effects of different promoters on catalytic performance, specifically how their sequence of addition dramatically influenced the performance of these materials in the Fischer-Tropsch synthesis. We also continued our studies of the kinetic behavior of these materials during the sixth reporting period. Specifically, the effects of H{sub 2}, CO, and CO{sub 2} on the rates and selectivities of Fischer-Tropsch Synthesis reactions led us to propose a new sequence of elementary steps on Fe and Co Fischer-Tropsch catalysts. Finally, we also started a study of the use of colloidal precipitation methods for the synthesis small Co clusters using recently developed methods to explore possible further improvements in FTS rates and selectivities. We found that colloidal synthesis makes possible the preparation of small cobalt particles, although large amount of cobalt silicate species, which are difficult to reduce, were formed. During this seventh reporting period, we have explored several methods to modify the silanol groups on SiO{sub 2} by using either a homogeneous deposition-precipitation method or surface titration of Si-OH on SiO{sub 2} with zirconium (IV) ethoxide to prevent the formation of unreducible and unreactive CoO{sub x} species during synthesis and FTS catalysis. We have synthesized monometallic Co/ZrO{sub 2}/SiO{sub 2} catalysts with different Co loadings (11-20 wt%) by incipient wetness impregnation methods and characterized the prepared Co supported catalysts by H{sub 2} temperature-programmed reduction (H{sub 2}-TPR) and H{sub 2}-chemisorption. We have measured the catalytic performance in FTS reactions and shown that although the hydroxyl groups on the SiO{sub 2} surface are difficult to be fully titrated by ZrO{sub 2}, modification of ZrO{sub 2} on SiO{sub 2} surface can improve the Co clusters dispersion and lead to a larger number of exposed Co surface atoms after reduction and during FTS reactions. During this seventh reporting period, we have also advanced our development of the reaction mechanism proposed in the previous reporting period. Specifically, we have shown that our novel proposal for the pathways involved in CO activation on Fe and Co catalysts is consistent with state-of-the-art theoretical calculations carried out in collaboration with Prof. Manos Mavrikakis (University of Wisconsin-Madison). Finally, we have also worked on the preparation of several manuscripts describing our findings about the preparation, activation and mechanism of the FTS with Fe-based catalysts and we have started redacting the final report for this project.

Akio Ishikawa; Manuel Ojeda; Nan Yao; Enrique Iglesia

2007-03-31T23:59:59.000Z

263

TOPIC Brief BUILDING TECHNOLOGIES PROGRAM BIM and Demonstrating Code Compliance TOPIC BRIEF 1  

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

BIM and Demonstrating Code Compliance TOPIC BRIEF 1 BIM and Demonstrating Code Compliance TOPIC BRIEF 1 Building Information Modeling and Demonstrating Code Compliance Demonstrating or verifying compliance with codes, standards, or other criteria governing building design is achieved through a set of specific tasks. These include producing construction documents; providing specifications for the products, materials, equipment, and systems to be used; and describing how they come together to create the envisioned building. W hen building construction documents and specifications are produced, they should include all information necessary to prescribe how the building is to be constructed. Plans and specifications should be readily usable to verify compliance with prescriptive requirements of codes, standards, or other desired

264

TOPIC Brief BUILDING TECHNOLOGIES PROGRAM Residential Duct Insulation and Sealing Requirements TOPIC BRIEF 1  

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

Duct Insulation and Sealing Requirements TOPIC BRIEF 1 Duct Insulation and Sealing Requirements TOPIC BRIEF 1 Residential Duct Insulation and Sealing Requirements Studies show that duct air leakage results in major energy losses. A ll versions of the International Energy Conservation Code (IECC) require ducts, air handlers, filter boxes, and air cavities used as ducts to be sealed, and reference Chapter 16 of the International Residential Code for details on air sealing. This sealing is required on all ducts and other air distribution components regardless of whether they are located inside or outside the conditioned living space. For single-family homes and other low-rise residential buildings, the 2009 and 2012 IECC have duct insulation and sealing requirements in Section 403.2. Both codes require insulation

265

TOPIC Brief BUILDING TECHNOLOGIES PROGRAM Getting It Right TOPIC BRIEF 1  

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

Getting It Right TOPIC BRIEF 1 Getting It Right TOPIC BRIEF 1 Getting it Right: A Brief Discussion of Commissioning, Testing, and Balancing Requirements in ASHRAE Standard 90.1 and the IECC You can design the best building in the world and still end up with a building that doesn't perform to its full potential if something isn't done right. Commissioning, testing, and balancing are all ways of identifying things that "aren't right" and fixing them. A recent report from Lawrence Berkeley National Laboratory 1 (LBNL) discusses the importance of commissioning by pointing out that an evaluation of nearly 99 million square feet of commissioned buildings showed savings of 13% and 16% of whole building energy use for new construction and existing buildings, respectively. Table

266

Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation  

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

Interconnection-Wide Transmission Planning Initiative: Topic B, Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation Among States in the Eastern Interconnection on Electric Resource Planning and Priorities Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation Among States in the Eastern Interconnection on Electric Resource Planning and Priorities A description of the requirements for Topic B for the Eastern Interconnection under the Interconnection-Wide Transmission Planning Initiative, part of the American Recovery and Reinvestment Act. The fundamental purpose of the awards under Topic B is to facilitate dialogue and collaboration among the states in the respective interconnections (or among state agencies, in the Texas Interconnection). Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation

267

Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation  

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

Interconnection-Wide Transmission Planning Initiative: Topic B, Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation Among States in the Eastern Interconnection on Electric Resource Planning and Priorities Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation Among States in the Eastern Interconnection on Electric Resource Planning and Priorities A description of the requirements for Topic B for the Eastern Interconnection under the Interconnection-Wide Transmission Planning Initiative, part of the American Recovery and Reinvestment Act. The fundamental purpose of the awards under Topic B is to facilitate dialogue and collaboration among the states in the respective interconnections (or among state agencies, in the Texas Interconnection). Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation

268

Argonne CNM Highlight: Gold nanoparticles create visible-light catalysis in  

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

Silver chloride-gold nanoparticles Gold-coated silver chloride (AgCl) nanowires at the microscopic level. In the News United Press International | PhysOrg.com | R&D Magazine| Nanotechnology Now | Photonics.com Gold nanoparticles create visible-light catalysis in nanowires A two-step approach has been developed within the Nanophotonics Group to synthesize AgCl nanowires decorated with gold nanoparticles by using silver nanowires as chemical templates. In the first step, the silver nanowires are chemically oxidized and converted to AgCl nanowires. In the second step, ions generated in the first step reduce gold precursors (e.g., NaAuCl4) to deposit gold nanoparticles on the AgCl nanowire surfaces, resulting in the formation of AgCl:gold composite nanowires. Because of the

269

States with identical steady dissipation rate: Role of kinetic constants in enzyme catalysis  

E-Print Network [OSTI]

A non-equilibrium steady state is characterized by a non-zero steady dissipation rate. Chemical reaction systems under suitable conditions may generate such states. We propose here a method that is able to distinguish states with identical values of the steady dissipation rate. This necessitates a study of the variation of the entropy production rate with the experimentally observable reaction rate in regions close to the steady states. As an exactly-solvable test case, we choose the problem of enzyme catalysis. Link of the total entropy production with the enzyme efficiency is also established, offering a desirable connection with the inherent irreversibility of the process. The chief outcomes are finally noted in a more general reaction network with numerical demonstrations.

Banerjee, Kinshuk

2014-01-01T23:59:59.000Z

270

Asymmetry of rotational catalysis of single membrane-bound F0F1-ATP synthase  

E-Print Network [OSTI]

Synthesis of the cellular 'energy currency' ATP is catalyzed by membrane-bound F0F1-ATP synthases. The chemical reaction at three binding sites in the F1 part is coupled to proton translocation through the membrane-integrated F0 part by an internal rotation of subunits. We examined the rotary movements of the epsilon-subunit of the 'rotor' with respect to the b-subunits of the 'stator' by single-molecule fluorescence resonance energy transfer (FRET). Rotation of epsilon during ATP hydrolysis is divided into three major steps with constant FRET level corresponding to three binding sites. Different catalytic activities of the individual binding sites were observed depending on the relative orientation of the 'rotor'. Computer simulations of the FRET signals and non-equally distributed orientations of epsilon strongly corroborate asymmetry of catalysis in F0F1-ATP synthase.

Zarrabi, Nawid; Diez, Manuel; Graeber, Peter; Wrachtrup, Joerg; Boersch, Michael

2007-01-01T23:59:59.000Z

271

Protein conformational dynamics in the mechanism of HIV-1 protease catalysis  

SciTech Connect (OSTI)

We have used chemical protein synthesis and advanced physical methods to probe dynamics-function correlations for the HIV-1 protease, an enzyme that has received considerable attention as a target for the treatment of AIDS. Chemical synthesis was used to prepare a series of unique analogues of the HIV-1 protease in which the flexibility of the 'flap' structures (residues 37-61 in each monomer of the homodimeric protein molecule) was systematically varied. These analogue enzymes were further studied by X-ray crystallography, NMR relaxation, and pulse-EPR methods, in conjunction with molecular dynamics simulations. We show that conformational isomerization in the flaps is correlated with structural reorganization of residues in the active site, and that it is preorganization of the active site that is a rate-limiting factor in catalysis.

Torbeev, Vladimir Yu.; Raghuraman, H.; Hamelberg, Donald; Tonelli, Marco; Westler, William M.; Perozo, Eduardo; Kent, Stephen B.H. (GSU); (UW); (UC)

2013-09-17T23:59:59.000Z

272

Federal Requirements for Sustainable Buildings by Topic | Department of  

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

Topic Topic Federal Requirements for Sustainable Buildings by Topic October 4, 2013 - 4:46pm Addthis For sustainable buildings at Federal agencies, the laws and regulations required for compliance fall under the following topics. Also see Federal Requirements for Sustainable Buildings by Law and Regulation and Guiding Principles for Federal Leadership in High-Performance and Sustainable Buildings. Greenhouse Gas (GHG) Reduction GHG reduction requirements for sustainable buildings include: Decreasing agency use of chemicals where such decrease will assist the agency in achieving GHG reduction targets Reducing water and energy use intensity. Also see information on GHG Mitigation Planning for Buildings. Water Use Intensity Water use intensity requirements for sustainable buildings include:

273

Special Topics in NEPA Documentation | Department of Energy  

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

Special Topics in NEPA Documentation Special Topics in NEPA Documentation Special Topics in NEPA Documentation Selected documents covering Special Topics under NEPA. February 18, 2010 DRAFT NEPA Guidance on Consideration of the Effects of Climate Change and Greenhouse Gas Emissions The Council on Environmental Quality (CEQ) issued this draft guidance memorandum for public consideration and comment on the ways in which Federal agencies can improve their consideration of the effects of greenhouse gas (GHG) emissions and climate change in their evaluation of proposals for Federal actions under NEPA. July 10, 2002 Recommendations for Analyzing Accidents Under NEPA This DOE guidance clarifies and supplements "Recommendations for the Preparation of Environmental Assessments and Environmental Impact

274

WTP Safety Culture Advice Joint Topic (HSEP/TWC)  

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

should not be considered a substitute for full HAB consensus on any particular issue. WTP Safety Culture Advice Joint Topic (HSEPTWC) Framing questions for discussion regarding...

275

Energy Department Announces Topics and New Approaches for Grants...  

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

announced new topics under its Small Business Innovation Research (SBIR) and Technology Transfer (STTR) program that will help small businesses develop innovative ideas and...

276

Small Business Innovation Research (SBIR) FY 2014 Phase I topics...  

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

Selected topic and subtopics contained in this document are designated as Technology Transfer Opportunities (TTOs). sbirtopics10-28-13.pdf More Documents & Publications...

277

Small Business Innovation Research Program Topics- October 28, 2013  

Office of Energy Efficiency and Renewable Energy (EERE)

This document outlines the topics covered by the 2013-14 SBIR funding opportunity announcement and show the details of how to apply for the program.

278

Space Groups: A primer on topics significant for powder diffraction  

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

Space Groups: A primer on topics significant for powder diffraction Presentation Goal Introduce symmetry concepts important for Rietveld analysis, particularly of inorganic...

279

DOE Transportation Protocols Topic Group Conference Call Summary...  

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

Conference Call Summary May 13, 1999 The Transportation External Coordination Working Group (TECWG) Protocols Topic Group held a conference call on May 13, 1999, to discuss the...

280

TEC Working Group Topic Groups Archives Communications Conference...  

Office of Environmental Management (EM)

Communications Conference Call Summaries TEC Working Group Topic Groups Archives Communications Conference Call Summaries Conference Call Summaries Conference Call Summary April...

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

TEC Working Group Topic Groups Routing Conference Call Summaries...  

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

Routing Conference Call Summaries TEC Working Group Topic Groups Routing Conference Call Summaries CONFERENCE CALL SUMMARIES January 31, 2008 December 6, 2007 October 4, 2007...

282

TEC Working Group Topic Groups Security Conference Call Summaries...  

Office of Environmental Management (EM)

Security Conference Call Summaries TEC Working Group Topic Groups Security Conference Call Summaries Conference Call Summaries August 17, 2006 (Draft) July 18, 2006 (Draft) June...

283

TEC Working Group Topic Groups Archives Protocols Conference...  

Office of Environmental Management (EM)

Conference Call Summaries TEC Working Group Topic Groups Archives Protocols Conference Call Summaries Conference Call Summaries May 13, 1999 April 8, 1999 March 1, 1999 More...

284

TEC Working Group Topic Groups Security Meeting Summaries | Department...  

Office of Environmental Management (EM)

Summaries TEC Working Group Topic Groups Security Meeting Summaries Meeting Summaries Green Bay STG Meeting Summary- September 14, 2006 Washington STG Meeting Summary - March 14,...

285

Events & Topics in Renewable Energy & the Environment | Photosynthetic...  

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

local Climate Technologies campus, followed by a brief presentation. Topics will include home automation, the internet of things, wireless sensor networks and other smart...

286

Events & Topics in Renewable Energy & the Environment | Photosynthetic...  

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

Climate Technologies campus, to be followed by a brief presentation. Topics will include home automation, the internet of things, wireless sensor networks, and other smart...

287

NREL: State and Local Governments - Solar Hot Topics STAT Webinars  

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

Education & Outreach Solar Technical Assistance Team Webinars Solar 101 Hot Topics DIY Solar Market Analysis Policy Basics Publications Request Assistance Technical Assistance...

288

Hanford Advisory Board Draft Advice Topic: In-trench Macroencapsula...  

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

Topic: In-trench Macroencapsulation of Waste at the Environmental Restoration Disposal Facility Authors: Bloom, Cimon, Hudson, Vanni, Pollet and Leckband Originating Committee:...

289

Hanford Advisory Board Draft Advice Topic: In-trench Macroencapsulatio...  

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

Topic: In-trench Macroencapsulation of Waste at the Environmental Restoration Disposal Facility Authors: Bloom, Cimon, Hudson, Vanni, Pollet and Leckband Originating Committee:...

290

Francois Glineur, Topics in Convex Optimization First Prev Next Last Go Back Full Screen Close Quit Topics in Convex Optimization  

E-Print Network [OSTI]

Fran¸cois Glineur, Topics in Convex Optimization ·First ·Prev ·Next ·Last ·Go Back ·Full Screen ·Close ·Quit Topics in Convex Optimization: Interior-Point Methods, Conic Duality and Approximations Fran January 26, 2001 T. Terlaky #12;Fran¸cois Glineur, Topics in Convex Optimization ·First ·Prev ·Next ·Last

Glineur, François

291

Francois Glineur, Topics in Convex Optimization First Prev Next Last Go Back Full Screen Close Quit Topics in Convex Optimization  

E-Print Network [OSTI]

Fran¸cois Glineur, Topics in Convex Optimization ·First ·Prev ·Next ·Last ·Go Back ·Full Screen ·Close ·Quit Topics in Convex Optimization: Interior-Point Methods, Conic Duality and Approximations Fran January 11, 2001 T. Terlaky #12;Fran¸cois Glineur, Topics in Convex Optimization ·First ·Prev ·Next ·Last

Glineur, François

292

Microsoft Word - 10622 topical report.DOC  

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

- - M M A A N N I I F F O O L L D D D D E E S S I I G G N N F F O O R R C C O O N N T T R R O O L L L L I I N N G G E E N N G G I I N N E E A A I I R R B B A A L L A A N N C C E E Prepared by Gary D. Bourn Ford A. Phillips Ralph E. Harris TOPICAL REPORT Reporting Period Start Date: 10/01/05 Reporting Period End Date: 12/31/05 DOE Award No. DE-FC26-02NT41646 SwRI Project No. 03.10622 Prepared for Mr. Richard Baker U.S. Department of Energy National Energy Technology Laboratory 3610 Collins Ferry Road, P.O. Box 880 Morgantown, WV 26507-0880 December 2005 S S O O U U T T H H W W E E S S T T R R E E S S E E A A R R C C H H I I N N S S T T I I T T U U T T E E ® ® SOUTHWEST RESEARCH INSTITUTE ® 6220 Culebra Road San Antonio, Texas 78238 T T E E C C H H N N O O L L O O G G I I E E S S T T O O E E N N H H A A N N C C E E T T H H E E O O P P

293

Parameter Estimation Versus Homogenization Techniques in Time-Domain Characterization of Composite Dielectrics  

E-Print Network [OSTI]

Parameter Estimation Versus Homogenization Techniques in Time-Domain Characterization of Composite problem approach to parameter estimation with homogenization techniques for characterizing the electrical with heterogeneous micro-structures which are described by spatially periodic parameters. We also consider

294

Topics in Modeling, Control, and Implementation in Automotive Systems  

E-Print Network [OSTI]

on inclusion of the dynamics of load transfer, which are of importance in active yaw-control and rollTopics in Modeling, Control, and Implementation in Automotive Systems #12;#12;Topics in Modeling, Control, and Implementation in Automotive Systems Magnus Gäfvert Lund 2003 #12;To my Mother (1943 ­ 1995

295

Topic 14 -Stroke 1. Blood supply to the brain  

E-Print Network [OSTI]

Topic 14 - Stroke 1. Blood supply to the brain 2. Types of stroke 3. Treatment of acute stroke Territories supplied by anterior, middle and posterior cerebral arteries. Topic 14 - Stroke 1. Blood supply to the brain 2. Types of stroke 3. Treatment of acute stroke #12;Stroke - a.k.a. "cerebrovascular accident

Sergio, Lauren E.

296

What's in a Link? From Document Importance to Topical Relevance  

E-Print Network [OSTI]

What's in a Link? From Document Importance to Topical Relevance Marijn Koolen1 and Jaap Kamps1,2 1 indicator of the topical relevance of a document for a given search request. As a result, link information is usually considered to be useful to identify the `importance' of documents. Local link evidence

Kamps, Jaap

297

Towards Topic Driven Access to Full Text Documents  

E-Print Network [OSTI]

Towards Topic Driven Access to Full Text Documents Caterina Caracciolo, Willem van Hage access to full text documents. The methodology we propose is a combination of topic segmentation and coherent documents that can be used in two ways: as a basis for automatically generating hypertext links

de Rijke, Maarten

298

Updated 19 March 2009 PHD TOPICS AVAILABLE AT NICTA, ATP  

E-Print Network [OSTI]

Updated 19 March 2009 PHD TOPICS AVAILABLE AT NICTA, ATP To contact any staff listed below by email staff is available on our people page http://www.nicta.com.au/people PhD Topics in Making Sense of Data and environmental factors. Extensive research is needed to investigate the best methods to capture and represent

Heiser, Gernot

299

Lattice Boltzmann simulations of decaying homogeneous isotropic turbulence  

Science Journals Connector (OSTI)

Decaying homogeneous isotropic turbulence in inertial and rotating reference frames is investigated to evaluate the capability of the lattice Boltzmann method in turbulence. In the inertial frame case, the decay exponents of kinetic energy and dissipation and the low wave-number scaling of the spectrum are studied. The results are in agreement with classical ones. In the frame-rotation case, simulations show that the energy decay rate decreases with decreasing Rossby number as the energy cascade is inhibited by rotation, again in agreement with turbulence physics. These results clearly indicate that the lattice Boltzmann method captures important features of decaying turbulence.

Huidan Yu; Sharath S. Girimaji; Li-Shi Luo

2005-01-25T23:59:59.000Z

300

Homogeneous Charge Compression Ignition Free Piston Linear Alternator  

SciTech Connect (OSTI)

An experimental and theoretical investigation of a homogeneous charge compression ignition (HCCI) free piston powered linear alternator has been conducted to determine if improvements can be made in the thermal and conversion efficiencies of modern electrical generator systems. Performance of a free piston engine was investigated using a rapid compression expansion machine and a full cycle thermodynamic model. Linear alternator performance was investigated with a computer model. In addition linear alternator testing and permanent magnet characterization hardware were developed. The development of the two-stroke cycle scavenging process has begun.

Janson Wu; Nicholas Paradiso; Peter Van Blarigan; Scott Goldsborough

1998-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

Exhaust gas recirculation in a homogeneous charge compression ignition engine  

DOE Patents [OSTI]

A homogeneous charge compression ignition engine operates by injecting liquid fuel directly in a combustion chamber, and mixing the fuel with recirculated exhaust and fresh air through an auto ignition condition of the fuel. The engine includes at least one turbocharger for extracting energy from the engine exhaust and using that energy to boost intake pressure of recirculated exhaust gas and fresh air. Elevated proportions of exhaust gas recirculated to the engine are attained by throttling the fresh air inlet supply. These elevated exhaust gas recirculation rates allow the HCCI engine to be operated at higher speeds and loads rendering the HCCI engine a more viable alternative to a conventional diesel engine.

Duffy, Kevin P. (Metamora, IL); Kieser, Andrew J. (Morton, IL); Rodman, Anthony (Chillicothe, IL); Liechty, Michael P. (Chillicothe, IL); Hergart, Carl-Anders (Peoria, IL); Hardy, William L. (Peoria, IL)

2008-05-27T23:59:59.000Z

302

Lack of energy equipartition in homogeneous heated binary granular mixtures  

E-Print Network [OSTI]

We consider the problem of determining the granular temperatures of the components of a homogeneous binary heated mixture of inelastic hard spheres, in the framework of Enskog kinetic theory. Equations are derived for the temperatures of each species and their ratio, which is different from unity, as may be expected since the system is out of equilibrium. We focus on the particular heating mechanism where the inelastic energy loss is compensated by an injection through a random external force (``stochastic thermostat''). The influence of various parameters and their possible experimental relevance is discussed.

A. Barrat; E. Trizac

2002-05-21T23:59:59.000Z

303

Interconnection-Wide Transmission Planning Initiative: Topic A,  

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

A, A, Interconnection-Level Analysis and Planning Interconnection-Wide Transmission Planning Initiative: Topic A, Interconnection-Level Analysis and Planning A description of the requirements for Topic A for all Interconnections under the Interconnection-Wide Transmission Planning Initiative, part of the American Recovery and Reinvestment Act. Interconnection-Wide Transmission Planning Initiative: Topic A, Interconnection-Level Analysis and Planning More Documents & Publications Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation Among States in the Eastern Interconnection on Electric Resource Planning and Priorities Microsoft Word - yDE-FOA-0000068.rtf Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation Among States in the Western Interconnection on Electric Resource Planning

304

Parametric Gasification of Oak and Pine Feedstocks Using the TCPDU and Slipstream Water-Gas Shift Catalysis  

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

Parametric Gasification of Oak Parametric Gasification of Oak and Pine Feedstocks Using the TCPDU and Slipstream Water-Gas Shift Catalysis Jason Hrdlicka, Calvin Feik, Danny Carpenter, and Marc Pomeroy Technical Report NREL/TP-510-44557 December 2008 Parametric Gasification of Oak and Pine Feedstocks Using the TCPDU and Slipstream Water-Gas Shift Catalysis Jason Hrdlicka, Calvin Feik, Danny Carpenter, and Marc Pomeroy Prepared under Task No. H2713B13 Technical Report NREL/TP-510-44557 December 2008 National Renewable Energy Laboratory 1617 Cole Boulevard, Golden, Colorado 80401-3393 303-275-3000 * www.nrel.gov NREL is a national laboratory of the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Operated by the Alliance for Sustainable Energy, LLC

305

Critical Endpoint and Inverse Magnetic Catalysis for Finite Temperature and Density Quark Matter in a Magnetic Background  

E-Print Network [OSTI]

In this article we study chiral symmetry breaking for quark matter in a magnetic background, $\\bm B$, at finite temperature and quark chemical potential, $\\mu$, making use of the Ginzburg-Landau effective action formalism. As a microscopic model to compute the effective action we use the renormalized quark-meson model. Our main goal is to study the evolution of the critical endpoint, ${\\cal CP}$, as a function of the magnetic field strength, and investigate on the realization of inverse magnetic catalysis at finite chemical potential. We find that the phase transition at zero chemical potential is always of the second order; for small and intermediate values of $\\bm B$, ${\\cal CP}$ moves towards small $\\mu$, while for larger $\\bm B$ it moves towards moderately larger values of $\\mu$. Our results are in agreement with the inverse magnetic catalysis scenario at finite chemical potential and not too large values of the magnetic field, while at larger $\\bm B$ direct magnetic catalysis sets in.

M. Ruggieri; L. Oliva; P. Castorina; R. Gatto; V. Greco

2014-02-04T23:59:59.000Z

306

Effect of high pressure homogenization on the physical properties of milk  

E-Print Network [OSTI]

homogenization in milk with 3'to milk fat homogenized at 79. 5'C, . 14. Effect of homogenization pressure on fat globule size distribution using double stage homogenization in milk with 3' milk fat homogenized at 79. 5'C. . . . . 52 . . . . 54 . . . . 55... to protein mass ratio (FPM) increased, particularly when FPM & 6. Surface to volume 13 mean diameter increased from 0. 42+ . 02 p. m at FPM of 1, to 1. 85 + . 09 at FPM of 13. Increasing FPM by varying the fat content led to an increase in the specific...

Gonzalez De Cossio, Carlos

2012-06-07T23:59:59.000Z

307

Mesoporous Silica Nanomaterials for Applications in Catalysis, Sensing, Drug Delivery and Gene Transfection  

SciTech Connect (OSTI)

The central theme of this dissertation is represented by the versatility of mesoporous silica nanomaterials in various applications such as catalysis and bio-applications, with main focus on biological applications of Mesoporous Silica Nanospheres (MSN). The metamorphosis that we impose to these materials from catalysis to sensing and to drug and gene delivery is detailed in this dissertation. First, we developed a synthetic method that can fine tune the amount of chemically accessible organic functional groups on the pores surface of MSN by exploiting electrostatic and size matching between the cationic alkylammonium head group of the cetyltrimethylammonium bromide (CTAB) surfactant and various anionic organoalkoxysilane precursors at the micelle-water interface in a base-catalyzed condensation reaction of silicate. Aiming nature imitation, we demonstrated the catalytic abilities of the MSNs, We utilized an ethylenediamine functional group for chelating Cu{sup 2+} as a catalytic functional group anchored inside the mesopores. Thus, a polyalkynylene-based conducting polymer (molecular wire) was synthesized within the Cu-functionalized MSNs silica catalyst. For sensing applications, we have synthesized a poly(lactic acid) coated mesoporous silica nanosphere (PLA-MSN) material that serves as a fluorescence sensor system for detection of amino-containing neurotransmitters in neutral aqueous buffer. We exploited the mesoporosity of MSNs for encapsulating pharmaceutical drugs. We examined bio-friendly capping molecules such as polyamidoamine dendrimers of generations G2 to G4, to prevent the drug leaching. Next, the drug delivery system employed MSNs loaded with Doxorubicin, an anticancer drug. The results demonstrated that these nano-Trojan horses have ability to deliver Doxorubicin to cancer cells and induce their death. Finally, to demonstrate the potential of MSN as an universal cellular transmembrane nanovehicle, we anchored positively charged dendrimers on the surface of MSN and utilize them to complex cationic DNA. The p-EGFP-CI gene-coated MSN nanocomposite was able to transfect cancer cell lines, such as human HeLa and CHO cancer cell lines. The gene carrier ability of MSNs was further proved by transfecting primary cells and cotransfecting of two different genes in cancer cell lines. In sum, MSN are versatile partners in several types of applications.

Daniela Rodica Radu

2005-12-19T23:59:59.000Z

308

Testing gaussianity, homogeneity and isotropy with the cosmic microwave background  

E-Print Network [OSTI]

We review the basic hypotheses which motivate the statistical framework used to analyze the cosmic microwave background, and how that framework can be enlarged as we relax those hypotheses. In particular, we try to separate as much as possible the questions of gaussianity, homogeneity and isotropy from each other. We focus both on isotropic estimators of non-gaussianity as well as statistically anisotropic estimators of gaussianity, giving particular emphasis on their signatures and the enhanced "cosmic variances" that become increasingly important as our putative Universe becomes less symmetric. After reviewing the formalism behind some simple model-independent tests, we discuss how these tests can be applied to CMB data when searching for large scale "anomalies"

L. Raul Abramo; Thiago S. Pereira

2010-05-13T23:59:59.000Z

309

Homogeneous gas-phase nucleation in silane pyrolysis  

Science Journals Connector (OSTI)

Dilute and particle free mixtures of silane in the range of 100 ppm to 10% by volume in different carrier gases were decomposed thermally in a tube reactor. The onset of homogeneous nucleation was determined as a function of temperature and silane concentration for each carrier gas using a CNC with a detection limit of ca 0.01 ?m. The gaseous decomposition by-products, disilane, trisilane and hydrogen were measured simultaneously using gas-phase chromatography. The onset of gas-phase nucleation was found to be inversely proportional to the temperature and influenced by the nature of the carrier gas. In inert gases, no chemical reaction took place between the decomposition products of silane and the carrier gas. In hydrogen, equilibrium displacement with the primary decomposition product (SiH2) lead to a retardation of particle formation. Thus, the temperatures of onset of gas-phase nucleation was higher for mixtures in hydrogen than for mixtures in inert gases.

Frank Slootman; Jean-Claude Parent

1994-01-01T23:59:59.000Z

310

Renewal convergence rates and correlation decay for homogeneous pinning models  

E-Print Network [OSTI]

A class of discrete renewal processes with super-exponentially decaying inter-arrival distributions coincides with the infinite volume limit of general homogeneous pinning models in their localized phase. Pinning models are statistical mechanics systems to which a lot of attention has been devoted both for their relevance for applications and because they are solvable models exhibiting a non-trivial phase transition. The spatial decay of correlations in these systems is directly mapped to the speed of convergence to equilibrium for the associated renewal processes. We show that close to criticality, under general assumptions, the correlation decay rate, or the renewal convergence rate, coincides with the inter-arrival decay rate. We also show that, in general, this is false away from criticality. Under a stronger assumption on the inter-arrival distribution we establish a local limit theorem, capturing thus the sharp asymptotic behavior of correlations.

Giambattista Giacomin

2007-06-03T23:59:59.000Z

311

Experimental Evaluation on Modulus of Equivalent Homogeneous Ettringite  

Science Journals Connector (OSTI)

In the present study, the average modulus of delayed ettringite is evaluated by an experimental method combined with theoretical analysis. Firstly, the delayed ettringite crystal is synthesized by chemical reaction of Aluminum sulfate and calcium hydroxide. Secondly, specimens are obtained by compressing the delayed ettringite crystal under different pre-loads. Thirdly, the variation of the modulus of the specimen with different pre-loads is tested using Instron material test machine and the SHPB technique, respectively. It is found that the experimental data may be suitably fitted by Boltzmann Function. Finally, the porosity of the specimen is detected using the saturation method, and the effect of the porosity on the modulus is analyzed by the Eshelby's equivalent inclusion method and the Mori-Tanaka's scheme. The static and dynamic modulli of the equivalent homogeneous ettringite obtained in present study are approximately 10.64 \\{GPa\\} and 24.61 GPa, respectively.

Minghua Zhang; Jiankang Chen; Jue Zhu; Jiangying Chen

2009-01-01T23:59:59.000Z

312

Generalized quantum gravity condensates for homogeneous geometries and cosmology  

E-Print Network [OSTI]

We construct a generalized class of quantum gravity condensate states, that allows the description of continuum homogeneous quantum geometries within the full theory. They are based on similar ideas already applied to extract effective cosmological dynamics from the group field theory formalism, and thus also from loop quantum gravity. However, they represent an improvement over the simplest condensates used in the literature, in that they are defined by an infinite superposition of graph-based states encoding in a precise way the topology of the spatial manifold. The construction is based on the definition of refinement operators on spin network states, written in a second quantized language. The construction lends itself easily to be applied also to the case of spherically symmetric quantum geometries.

Daniele Oriti; Daniele Pranzetti; James P. Ryan; Lorenzo Sindoni

2015-01-05T23:59:59.000Z

313

The Universe Adventure - The Homogenous and Isotropic Universe  

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

Our View of the Universe Our View of the Universe All observations that have been made using the most powerful telescopes show that the universe looks the same in all directions. The average density of galaxies is the same throughout the universe and does not change with distance or direction. This is called the Cosmological Principle. Distribution of Galaxies On average and at large scales, the distribution of galaxies is the same throughout the universe. Since the expansion of space occurs evenly at every point in the universe, galaxies are separating from each other at about the same pace, giving the universe a nearly uniform density and structure. As a result, the universe appears smooth at large distance scales. In scientific terms, it is said to be homogeneous and isotropic.

314

Application of cryogenic grinding to achieve homogenization of transuranic wastes  

SciTech Connect (OSTI)

This paper describes work done at Los Alamos National Laboratory (LANL) in collaboration with the Department of Energy Rocky Flats Field Office (DOE/RFFO) and with the National Institute of Standards and Technology (NIST), Boulder, Colorado. Researchers on this project have developed a method for cryogenic grinding of mixed wastes to homogenize and, thereby, to acquire a representative sample of the materials. There are approximately 220,000 waste drums owned by the Rocky Flats Environmental Technology Site (RFETS)-50,000 at RFETS and 170,000 at the Idaho National Engineering Laboratory. The cost of sampling the heterogeneous distribution of waste in each drum is prohibitive. In an attempt to produce a homogeneous mixture of waste that would reduce greatly the cost of sampling, researchers at NIST and RFETS are developing a cryogenic grinder. The Los Alamos work herein described addresses the implementation issues of the task. The first issue was to ascertain whether samples of the {open_quotes}small particle{close_quotes} mixtures of materials present in the waste drums at RFETS were representative of actual drum contents. Second, it was necessary to determine at what temperature the grinding operation must be performed in order to minimize or to eliminate the release of volatile organic compounds present in the waste. Last, it was essential to evaluate any effect the liquid cryogen might have on the structural integrity and ventilation capacity of the glovebox system. Results of this study showed that representative samples could be and had been obtained, that some release of organics occurred below freezing because of sublimation, and that operation of the cryogenic grinding equipment inside the glovebox was feasible.

Atkins, W.H.; Hill, D.D.; Lucero, M.E.; Jaramillo, L.; Martinez, H.E. [and others

1996-08-01T23:59:59.000Z

315

Property:DIA/Topic/Economic | Open Energy Information  

Open Energy Info (EERE)

Property Property Edit with form History Facebook icon Twitter icon » Property:DIA/Topic/Economic Jump to: navigation, search Property Name DIA/Topics/Economic Property Type String Description Sub-property for DIA/Topic Development Impacts Assessment Toolkit property to help filter pages Used in Form/Template Tool Allows Values General;Gross Domestic Product;Energy Security;Sectoral Employment;Sectoral Outputs Pages using the property "DIA/Topic/Economic" Showing 25 pages using this property. (previous 25) (next 25) A Applied Dynamic Analysis of the Global Economy (ADAGE) Model + General +, Gross Domestic Product +, Sectoral Outputs +, ... Asia-Pacific Integrated Model (AIM) + General +, Gross Domestic Product + C CDM Sustainable Development Tool + General +

316

Topic B Awardee: Western Governors' Association | Department of Energy  

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

Western Governors' Association Western Governors' Association Topic B Awardee: Western Governors' Association For the Topic A input requirements of the award, the states and provinces in the Western Interconnection have formed a new committee -- the State and Provincial Steering Committee -- to provide input in regional transmission planning and analysis in the interconnection. The Committee will consist of representatives from each state and province in the Western Interconnection. Pending formal announcement, the Committee is preparing to carry out the Topic A input tasks as outlined in Topic B of the U.S. Department of Energy transmission funding opportunity announcement issued in June 2009. A preliminary meeting of the Steering Committee was held in Tempe, AZ on November 6, 2009.

317

Property:DIA/Topic/Social | Open Energy Information  

Open Energy Info (EERE)

Property Property Edit with form History Facebook icon Twitter icon » Property:DIA/Topic/Social Jump to: navigation, search Property Name DIA/Topics/Social Property Type String Description Sub-property for DIA/Topic Development Impacts Assessment Toolkit property to help filter pages Used in Form/Template Tool Allows Values General;Education;Energy Access;Gender;Public Health Pages using the property "DIA/Topic/Social" Showing 25 pages using this property. (previous 25) (next 25) A Assessing Green Jobs Potential in Developing Countries: A Practitioner's Guide + General + C CDM Sustainable Development Tool + General +, Public Health + Co-benefits Risk Assessment (COBRA) Screening Model + Public Health + E E3MG + Public Health + Electricity Markets Analysis (EMA) Model + Public Health +

318

Electricity Advisory Committee Potential Study Topics Requested by  

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

Potential Study Topics Requested by Potential Study Topics Requested by U.S. Department of Energy As of 2-10-11 Note: DOE invites the EAC to discuss, for each of the topics listed below, whether it should undertake a detailed analysis of the subject, or whether it should limit itself to providing recommendations to DOE about how the topic should be framed and analyzed by the national laboratories or other parties. 1. Long-Term Funding for Electric Infrastructure Analytic and Planning Capabilities. Using funds provided by the 2009 Recovery Act, the U.S. Department of Energy (DOE) has funded the establishment of interconnection-level capabilities to address long-term analytic and planning challenges. DOE also believes that given the likelihood of ongoing fundamental change in the electricity sector, the strategic

319

X_II_DesignPhase_Topical_Report_Dec05.book  

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

Topical Report Topical Report submitted to The Department of Energy (DoE) National Energy Technology Laboratory (NETL) under Contract # DE-FC26-04NT42264 for PHASE I TOPICAL REPORT Reporting Period: 10-01-2004 to 12-31-2005 compiled as part of the project titled Explorer-II: Wireless Self-powered Visual and NDE Robotic Inspection System for Live Gas Distribution Mains Document Number: REP-GOV-DOE-051231 Date of Submission: January 31 st , 2006 submitted by Carnegie Mellon University The Robotics Institute - REC #10 on 40th Street Pittsburgh, PA 15201 (412) 268-2000 Administrative Contact: Susan Burkett Technical Contact: Hagen Schempf, Ph.D. Explorer-II:Wireless Self-powered Visual and NDE Robotic Inspection System for Live Gas Distribution Mains Topical Report - Design Phase i DISCLAIMER

320

TEC Working Group Topic Groups Routing | Department of Energy  

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

Routing Routing TEC Working Group Topic Groups Routing ROUTING The Routing Topic Group has been established to examine topics of interest and relevance concerning routing of shipments of spent nuclear fuel (SNF) and high-level radioactive waste (HLW) to a national repository at Yucca Mountain, Nevada by highway, rail, and intermodal operations that could involve use of barges. Ultimately, the main goal for the topic group members will be to provide stakeholder perspectives and input to the Office of Logistics Management (OLM) in the Department of Energy's (DOE) Office of Civilian Radioactive Waste Management (OCRWM) for the identification of a national suite of routes to Yucca Mountain. The identification of a suite of routes will provide an advanced planning framework for State and Tribal

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

Property:DIA/Topic/Environmental | Open Energy Information  

Open Energy Info (EERE)

Property Property Edit with form History Facebook icon Twitter icon » Property:DIA/Topic/Environmental Jump to: navigation, search Property Name DIA/Topics/Environmental Property Type String Description Sub-property for DIA/Topic Development Impacts Assessment Toolkit property to help filter pages Used in Form/Template Tool Allows Values All;Air;Biodiversity;Climate Resilience;Greenhouse Gases;Water Pages using the property "DIA/Topic/Environmental" Showing 25 pages using this property. (previous 25) (next 25) A Alternative Fuel and Advanced Technology Vehicles Pilot Program Emissions Benefit Tool + Air +, Greenhouse Gases +, All + Applied Dynamic Analysis of the Global Economy (ADAGE) Model + Greenhouse Gases +, All + Asia-Pacific Integrated Model (AIM) + Greenhouse Gases +, All +

322

Training and Medical Training Issues Topic Group Meeting Summary  

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

and Medical Training Issues Topic Group Meeting Summary and Medical Training Issues Topic Group Meeting Summary Philadelphia, PA July 13, 1999 Fire Chief Bill Ruting (La Grange, IL, Fire Department) presented the results of the topic group's discussions: The MERRTT (Modular Emergency Response Radiological Transportation Training) series, comprised of 16 modules, is in the process of being finalized and pilot tested in a number of locations in the U.S. Pilot testing will include: using a needs assessment tool; developing model procedures; and actual training delivery of the MERRTT modules. The topic group, working with the regional government group staff representatives to TEC/WG, has sent a survey to State points-of-contact

323

Interconnection-Wide Transmission Planning Initiative: Topic B, State  

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

State Agency Input Regarding Electric Resource and Transmission Planning in State Agency Input Regarding Electric Resource and Transmission Planning in the Texas Interconnection Interconnection-Wide Transmission Planning Initiative: Topic B, State Agency Input Regarding Electric Resource and Transmission Planning in the Texas Interconnection A description of the requirements for Topic B for the Texas Interconnect under the Interconnection-Wide Transmission Planning Initiative, part of the American Recovery and Reinvestment Act. The fundamental purpose of the awards under Topic B is to facilitate dialogue and collaboration among the states in the respective interconnections (or among state agencies, in the Texas Interconnection). Interconnection-Wide Transmission Planning Initiative: Topic B, State Agency Input Regarding Electric Resource and Transmission Planning in the

324

Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation  

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

Cooperation Among States in the Western Interconnection on Electric Cooperation Among States in the Western Interconnection on Electric Resource Planning and Priorities Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation Among States in the Western Interconnection on Electric Resource Planning and Priorities A description of the requirements for Topic B for the Western Interconnection under the Interconnection-Wide Transmission Planning Initiative, part of the American Recovery and Reinvestment Act. The fundamental purpose of the awards under Topic B is to facilitate dialogue and collaboration among the states in the respective interconnections (or among state agencies, in the Texas Interconnection). Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation Among States in the Western Interconnection on Electric Resource Planning

325

NICTA Advanced Course Advanced Topics in Software Verification  

E-Print Network [OSTI]

.g. c) § Have syntax 'a :: c for: type 'a supports the operations of c § Can write abstract polymorphicCOMP 4161 NICTA Advanced Course Advanced Topics in Software Verification Gerwin Klein, June

Klein, Gerwin

326

Module name: Advanced topic: Visual Computing Abbreviation: SVC  

E-Print Network [OSTI]

visualization (registration and segmentation of computer tomography measurement data), digital image generationModule name: Advanced topic: Visual Computing Abbreviation: SVC Study semester: 3rd semester (WS Recommended prerequisites: Geometric Modeling, Interactive Computer Graphics Learning goals: Technological

Ahlers, Volker - Fakultät IV

327

PRESENTATION TOPICS Overview of the American Recovery and  

E-Print Network [OSTI]

Job Workforce - $20 million Energy Efficiency Financing Program - $25 million Clean Energy Business#12;PRESENTATION TOPICS Overview of the American Recovery and Reinvestment Act (ARRA) Energy Programs the Energy Commission is Administering CPUC Grant Application Other ARRA Program Initiatives ARRA

328

TEC/WG Security Topic Group Conference Call  

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

Security Topic Group Conference Call Monday, August 29 th , 2005 12:00 p.m., MDT Participants: DOE: Judith Holm, Alex Thrower, Priscilla Bumbaca WIEB: Scott Field, Bill Mackie, Bob...

329

A New Scanning Tunneling Microscope Reactor Used for High Pressure and High Temperature Catalysis Studies  

SciTech Connect (OSTI)

We present the design and performance of a home-built high-pressure and high-temperature reactor equipped with a high-resolution scanning tunneling microscope (STM) for catalytic studies. In this design, the STM body, sample, and tip are placed in a small high pressure reactor ({approx}19 cm{sup 3}) located within an ultrahigh vacuum (UHV) chamber. A sealable port on the wall of the reactor separates the high pressure environment in the reactor from the vacuum environment of the STM chamber and permits sample transfer and tip change in UHV. A combination of a sample transfer arm, wobble stick, and sample load-lock system allows fast transfer of samples and tips between the preparation chamber, high pressure reactor, and ambient environment. This STM reactor can work as a batch or flowing reactor at a pressure range of 10{sup -13} to several bars and a temperature range of 300-700 K. Experiments performed on two samples both in vacuum and in high pressure conditions demonstrate the capability of in situ investigations of heterogeneous catalysis and surface chemistry at atomic resolution at a wide pressure range from UHV to a pressure higher than 1 atm.

Tao, Feng; Tang, David C.; Salmeron, Miquel; Somorjai, Gabor A.

2008-05-12T23:59:59.000Z

330

Catalysis and clean environment: What do these two have in common?  

SciTech Connect (OSTI)

The theme of the 1990s, ``Continual Expansion through Sustainable Development,`` is the outcome of interdisciplinary studies undertaken in the preceding two decades to arrest ongoing global environmental deterioration. A critical component of various international efforts to formulate and implement environmentally-sound technologies is the planned involvement of developing countries and countries with economies in-transition which are poised for explosive growth well into the twenty-first century but do not have policies or financial resources to simultaneously manage their environment. Though CO{sub 2}-producing, technologies utilizing relatively abundant and inexpensive carbon-based feedstocks will still play a major role on the scene. Related to this, the aim of the ongoing effort at Brookhaven National Laboratory is to develop technologies for enhancing natural gas and coal usage through liquid phase catalysis. A successful application of this concept in the synthesis of oxygenates is described. The potential impact of this activity on methanol-energy, non-petroleum feedstocks development, H{sub 2}-energy, CO{sub 2}-recycle, and several other areas in relation to CO{sub 2}-mitigation, is also discussed.

Mahajan, D.; Gupta, N.; Kobayashi, A.

1993-07-01T23:59:59.000Z

331

DFT calculations of EPR parameters of transition metal complexes: Implications for catalysis  

SciTech Connect (OSTI)

Transition metal and ligand hyperfine coupling constants for paramagnetic vanadium and copper model complexes have been calculated using DFT methods that are available in commercial software packages. Variations in EPR parameters with ligand identity and ligand orientation are two of the trends that have been investigated with DFT calculations. For example, the systematic variation of the vanadium hyperfine coupling constant with orientation for an imidazole ligand in a VO2+ complex has been observed experimentally and has also been reproduced by DFT calculations. Similarly, changes in the vanadium hyperfine coupling constant with ligand binding have been calculated using model complexes and DFT methods. DFT methods were also used to calculate ligand hyperfine coupling constants in transition metal systems. The variation of the proton hyperfine coupling constant with water ligand orientation was investigated for [VO(H2O)5]2+ and the results were used to interpret high resolution EPR data of VO2+-exchanged zeolites. Nitrogen hyperfine and quadrupole coupling constants for VO2+ model complexes were calculated and compared with experimental data. The computational results were used to enhance the interpretation of the EPR data for vanadium-exchanged zeolites which are promising catalytic materials. The implications of the DFT calculations of EPR parameters with respect to catalysis will be discussed

Saladino, Alexander C.; Larsen, Sarah C.

2005-07-15T23:59:59.000Z

332

SBIR/STTR Phase I Release 2 Technical Topics Announced for FY14 Fuel Cell Topics Included  

Broader source: Energy.gov [DOE]

Phase I Release 2 technical topics include prototype fuel cell-battery electric hybrid trucks for waste transportation and novel membranes and non-platinum group metal catalysts for direct methanol as well as hydrogen fuel cells.

333

A Decision Mechanism for the Selective Combination of Evidence in Topic Distillation  

E-Print Network [OSTI]

A Decision Mechanism for the Selective Combination of Evidence in Topic Distillation Vassilis combination of evidence for Web Information Retrieval and particularly for topic distillation. We introduce. Keywords Web information retrieval, Topic distillation, decision mechanism, selective combination

Jose, Joemon M.

334

Numerical homogenization of concrete microstructures without explicit meshes  

SciTech Connect (OSTI)

Life management of electric hydro or nuclear power plants requires to estimate long-term concrete properties on facilities, for obvious safety and serviceability reasons. Decades-old structures are foreseen to be operational for several more decades. As a large number of different concrete formulations are found in EDF facilities, empirical models based on many experiments cannot be an option for a large fleet of power plant buildings. To build predictive models, homogenization techniques offer an appealing alternative. To properly upscale creep, especially at long term, a rather precise description of the microstructure is required. However, the complexity of the morphology of concrete poses several challenges. In particular, concrete is formulated to maximize the packing density of the granular skeleton, leading to aggregates spanning several length scales with small inter particle spacings. Thus, explicit meshing of realistic concrete microstructures is either out of reach of current meshing algorithms or would produce a number of degrees of freedom far higher than the current generic FEM codes capabilities. This paper proposes a method to deal with complex matrix-inclusions microstructures such as the ones encountered at the mortar or concrete scales, without explicitly meshing them. The microstructure is superimposed to an independent mesh, which is a regular Cartesian grid. This inevitably yields so called 'gray elements', spanning across multiple phases. As the reliability of the estimate of the effective properties highly depends on the behavior affected to these gray elements, special attention is paid to them. As far as the question of the solvers is concerned, generic FEM codes are found to lack efficiency: they cannot reach high enough levels of discretization with classical free meshes, and they do not take advantage of the regular structure of the mesh. Thus, a specific finite differences/finite volumes solver has been developed. At first, generic off-the-shelf linear system solvers were used. To further improve the efficiency in terms of memory requirements, specific variants of the preconditioned conjugate gradient were implemented. This allowed to homogenize the conductivity of a concrete-like microstructure using more than 10{sup 9} degrees of freedom on a rather common hardware for 2010 (a PC embedding 48 GB of RAM). Taking benefit of the properties of the regular Cartesian grid we have also investigated a multi-level method to improve the CPU efficiency of the code.

Sanahuja, Julien, E-mail: julien.sanahuja@edf.fr; Toulemonde, Charles, E-mail: charles.toulemonde@edf.fr

2011-12-15T23:59:59.000Z

335

Geodesic Particle Paths Inside a Nonrotating, Homogeneous, Spherical Body  

E-Print Network [OSTI]

Proceeding from a solution of field equations that are improved versions of Einstein's nonvacuum gravitational field equations one is able to calculate precisely the trajectories of particles traveling inside a nonrotating, homogeneous, spherical body. Application of the results to the conditions of recent measurements of neutrino flight times between a source point A at CERN's European Laboratory for Particle Physics and a point B in either of two detectors (ICARUS or OPERA) at LNGS (Laboratori Nazionale del Gran Sasso), separated by a euclidean distance d(A,B) = 731 km, predicts for the flight time from A to B of a 2 eV neutrino launched with energy 17 GeV, as measured by a clock at B synchronized to a similar clock at A, approximately d/c + 9.3 x 10^{-16} sec. But as measured by inertial observers along the path the predicted flight time is approximately d/c - 2.6 x 10^{-9} sec and the predicted path length is approximately d - 8.4 x 10^{-7} m, which yields c + 321 m/sec for the predicted average inertially referenced speed of the neutrino from A to B.

Homer G. Ellis

2012-10-18T23:59:59.000Z

336

Modeling of homogeneous charge compression ignition (HCCI) of methane  

SciTech Connect (OSTI)

The operation of piston engines on a compression ignition cycle using a lean, homogeneous charge has many potential attractive features. These include the potential for extremely low NO{sub x} and particulate emissions while maintaining high thermal efficiency and not requiring the expensive high pressure injection system of the typical modem diesel engine. Using the HCT chemical kinetics code to simulate autoignition of methane-air mixtures, we have explored the ignition timing, burn duration, NO{sub x} production, indicated efficiency and power output of an engine with a compression ratio of 15:1 at 1200 and 2400 rpm. HCT was modified to include the effects of heat transfer. This study used a single control volume reaction zone that varies as a function of crank angle. The ignition process is controlled by varying the intake equivalence ratio and varying the residual gas trapping (RGT). RGT is internal exhaust gas recirculation which recycles both heat and combustion product species. It is accomplished by varying the timing of the exhaust valve closure. Inlet manifold temperature was held constant at 330 Kelvins. Results show that there is a narrow range of operational conditions that show promise of achieving the control necessary to vary power output while keeping indicated efficiency above 50% and NO{sub x} levels below 100 ppm.

Smith, J.R.; Aceves, S.M.; Westbrook, C.; Pitz, W.

1997-05-01T23:59:59.000Z

337

Condensation of cloud microdroplets in homogeneous isotropic turbulence  

E-Print Network [OSTI]

The growth by condensation of small water droplets in a three-dimensional homogeneous isotropic turbulent flow is considered. Within a simple model of advection and condensation, the dynamics and growth of millions of droplets are integrated. A droplet-size spectra broadening is obtained and it is shown to increase with the Reynolds number of turbulence, by means of two series of direct numerical simulations at increasing resolution. This is a key point towards a proper evaluation of the effects of turbulence for condensation in warm clouds, where the Reynolds numbers typically achieve huge values. The obtained droplet-size spectra broadening as a function of the Reynolds number is shown to be consistent with dimensional arguments. A generalization of this expectation to Reynolds numbers not accessible by DNS is proposed, yielding upper and lower bounds to the actual size-spectra broadening. A further DNS matching the large scales of the system suggests consistency of the picture drawn, while additional effort is needed to evaluate the impact of this effect for condensation in more realistic cloud conditions.

Alessandra S. Lanotte; Agnese Seminara; Federico Toschi

2008-07-15T23:59:59.000Z

338

Panaches horizontaux non-Boussinesq en milieu homog\\`ene  

E-Print Network [OSTI]

The environmental impact of pollutants and effluents discharged into the atmosphere or the oceans has led researchers to conduct studies related to this issue. Several works have been carried out in this context in order to reduce the effect on the local environment. These types of ejections in nature are modeled as jets in the presence of a density gradient. In this study we treated the problem of inclined round turbulent buoyant jets and plumes ejected in a homogeneous or stratified fluid, at rest or in motion. The prediction of the flow behavior, i.e. the evolution of its variables, is first treated theoretically from a model whose formalism is valid in both the Boussinesq case as well as in the non-Boussinesq general case. Solving the equations governing the plumes is performed numerically using a Runge-Kutta 4th order. To validate the model, laboratory experiments are performed with round jets of air and helium for a wide range of densities. The confrontation theory-experience aims here to fix the limits...

Daddi-Moussa-Ider, Abdallah; Mehaddi, Rabah; Vauquelin, Olivier; Candelier, Fabien

2014-01-01T23:59:59.000Z

339

Evaluation of the core physics and safety characteristics of a quasi-homogeneous LMFBR concept  

SciTech Connect (OSTI)

A core design concept utilizing two types of driver assemblies that differ in fuel pin diameter has been investigated as an alternative to the heterogeneous LMFBR core for achieving low HCDA energetics. Core designs based on the (quasi-homogeneous) concept were developed and their performance compared to that of standard homogeneous and hetergeneous cores. It is shown that quasi-homogenous cores can be designed which possess many of the performance advantages of homogeneous cores (such as reduced power mismatches and local power swings), while retaining the potential safty advantages of heterogeneous cores (such as an incoherent response during loss-of-flow accidents and a reduced coolant void reactivity worth).

Khalil, H.; Yarlagadda, B.S.

1984-01-01T23:59:59.000Z

340

Effect of ambient conditions and fuel properties on homogeneous charge compression ignition engine operation  

E-Print Network [OSTI]

Practical application of Homogeneous Charge Compression Ignition (HCCI) combustion must demonstrate robust responses to variations in environmental conditions. This work examines the impact of ambient conditions and fuel ...

Andreae, Morgan M. (Morgan MacKenzie)

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

Solar energy storage through the homogeneous electrocatalytic reduction of carbon dioxide : photoelectrochemical and photovoltaic approaches  

E-Print Network [OSTI]

electricity from photovoltaic cells to convert CO 2 intoSolar Energy Anode Photovoltaic Cell Cathode PP Mesh SpacerCoupling a Photovoltaic Solar Cell with a Homogeneous

Sathrum, Aaron John

2011-01-01T23:59:59.000Z

342

Microstructure homogenization control of Nb-bearing X65 pipeline steel by the CSP process  

Science Journals Connector (OSTI)

In order to get the controlled methods of microstructure homogenization and high strengthening-toughening combination by compact strip production (CSP) rolling, the dynamic recrystallization characteristics of ea...

Ming-yang Li; Ya-zheng Liu; Tao Zhu…

2011-02-01T23:59:59.000Z

343

Approximation of inhomogeneous thermal lines via series connection of homogeneous thermal lines  

Science Journals Connector (OSTI)

A method is given for approximating an arbitrary inhomogeneous thermal line (ITL) as a series connection of homogeneous thermal lines (HTL). The method is compared with...

L. S. Eleinikova

1974-10-01T23:59:59.000Z

344

Opportunities for Catalysis in The 21st Century. A report from the Basic Energy Sciences Advisory Committee  

SciTech Connect (OSTI)

Chemical catalysis affects our lives in myriad ways. Catalysis provides a means of changing the rates at which chemical bonds are formed and broken and of controlling the yields of chemical reactions to increase the amounts of desirable products from these reactions and reduce the amounts of undesirable ones. Thus, it lies at the heart of our quality of life: The reduced emissions of modern cars, the abundance of fresh food at our stores, and the new pharmaceuticals that improve our health are made possible by chemical reactions controlled by catalysts. Catalysis is also essential to a healthy economy: The petroleum, chemical, and pharmaceutical industries, contributors of $500 billion to the gross national product of the United States, rely on catalysts to produce everything from fuels to ''wonder drugs'' to paints to cosmetics. Today, our Nation faces a variety of challenges in creating alternative fuels, reducing harmful by-products in manufacturing, cleaning up the environment and preventing future pollution, dealing with the causes of global warming, protecting citizens from the release of toxic substances and infectious agents, and creating safe pharmaceuticals. Catalysts are needed to meet these challenges, but their complexity and diversity demand a revolution in the way catalysts are designed and used. This revolution can become reality through the application of new methods for synthesizing and characterizing molecular and material systems. Opportunities to understand and predict how catalysts work at the atomic scale and the nanoscale are now appearing, made possible by breakthroughs in the last decade in computation, measurement techniques, and imaging and by new developments in catalyst design, synthesis, and evaluation.

White, J. M.; Bercaw, J.

2002-05-16T23:59:59.000Z

345

2015 DOE SSL R&D Workshop LED Topic Table Questions to Consider  

Broader source: Energy.gov [DOE]

This document was distributed during the LED Topic Table portion of the DOE SSL R&D Workshop and aimed to prompt discussion on the following topics:

346

Chemistry {ampersand} Materials Science progress report summary of selected research and development topics, FY97  

SciTech Connect (OSTI)

This report contains summaries of research performed in the Chemistry and Materials Science division. Topics include Metals and Ceramics, High Explosives, Organic Synthesis, Instrument Development, and other topics.

Newkirk, L.

1997-12-01T23:59:59.000Z

347

E-Print Network 3.0 - abstracting and indexing as topic Sample...  

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

Probabilistic Latent Semantic Indexing (pLSI) 3 makes no assumptions about the document topic... and corpora In this work we study three topic models: ... Source: Blei,...

348

SBIR/STTR Phase I Technical Topics for FY15 Announced - Webinar...  

Office of Environmental Management (EM)

I Release 1 technical topics. These topics include non-platinum catalysts for fuel cells and detection of contaminants in hydrogen. DOE's key hydrogen objectives are to reduce...

349

Nitrous oxide emissions. Topical report, July 1, 1990--June 30, 1993  

SciTech Connect (OSTI)

Published N{sub 2}O emissions data for experimental studies examining large numbers of coals are generally scarce at the pilot-scale fluidized-bed combustion (FBC) level, although some data are available at the laboratory scale. The primary objective of this study was to determine the atmospheric contribution of N{sub 2}O derived from coal combustion. Additionally, the goal was to establish a comprehensive engineering model to assist in the prediction of N{sub 2}O emissions based upon operating and design considerations. To meet the overall objectives of determining the overall contribution of N{sub 2}O derived from FBC and developing an engineering model seven tasks were originally proposed. The objective of each task as originally proposed and finally executed is presented in this topical report. The seven tasks were: (1) literature survey; (2) equipment design and test plan development; (3) experimental techniques; (4) pilot-scale determination of the impacts of coal properties and operating conditions on N{sub 2}O emissions; (5) role of coal char on N{sub 2}O formation and destruction; (6) homogeneous versus heterogeneous reactions; and (7) modeling of N{sub 2}O emissions.

Collings, M.E.; Mann, M.D.

1993-12-01T23:59:59.000Z

350

Preliminary Fuel Cell Manufacturing R&D Topics  

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

draft research topics subject to revision prior to a solicitation being issued draft research topics subject to revision prior to a solicitation being issued May 18, 2007 FUEL CELL MANUFACTURING R & D Presently, Polymer Electrolyte Membrane (PEM) fuel cell stacks are fabricated at low volume, and the costs of these stacks range from $3,000 to $5,500 per kilowatt (kW) 1 . This is 50 to 90 times the projected cost of $60 per kW 2 for the same stack technology (2006) at high volume (500,000 units). In addition, six sigma standards must be reached for fuel cell subsystems and components to be competitive with conventional power systems such as internal combustion engines. Topics I through 5 described below provide a summary of the high-priority manufacturing needs for PEM fuel cell Membrane Electrode Assemblies (MEAs) and stacks. The overall goal is to reduce the cost of

351

TEC Working Group Topic Groups Archives Training - Medical Training |  

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

Training - Medical Training Training - Medical Training TEC Working Group Topic Groups Archives Training - Medical Training The TEC Training and Medical Training Issues Topic Group was formed to address the training issues for emergency responders in the event of a radioactive material transportation incident. The Topic Group first met in 1996 to assist DOE in developing an approach to address radiological emergency response training needs and to avoid redundancy of existing training materials. The group worked with the Transportation Emergency Preparedness Program (TEPP) to review existing training material to determine its applicability, developed a front-end analysis describing an approach, and developed the Modular Emergency Response Radiological Transportation Training (MERRTT). In 1998, the Medical Training Issues

352

Breakout Items Action Items Fixed Price Contracting Topic Group Summaries  

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

Albuquerque Meeting - July 1997 Albuquerque Meeting - July 1997 Breakout Items Action Items Fixed Price Contracting Topic Group Summaries TOPIC GROUP SUMMARIES Routing * Group reviewed and approved fourth draft of working paper "Routing Issues Related to U.S. Department of Energy Radioactive Materials Transportation: Discussion and Analysis" * Group submitted working paper and draft list of "Stakeholder Recommendations" to TEC/WG and DOE Group reached consensus on three major routing-related issues: * DOE should develop standardized, cooperative approach to route selection * DOE needs to involve all stakeholders * DOE should submit final version of Group's working paper to other federal entities Future topics for consideration: * routing issues relevant to tribal entities and local jurisdictions

353

Topic Area 3: National Certification Standard | Open Energy Information  

Open Energy Info (EERE)

Topic Area 3: National Certification Standard Topic Area 3: National Certification Standard Jump to: navigation, search Geothermal ARRA Funded Projects for Topic Area 3: National Certification Standard Loading map... {"format":"googlemaps3","type":"ROADMAP","types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"limit":200,"offset":0,"link":"all","sort":[""],"order":[],"headers":"show","mainlabel":"","intro":"","outro":"","searchlabel":"\u2026 further results","default":"","geoservice":"google","zoom":14,"width":"600px","height":"350px","centre":false,"layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","icon":"","visitedicon":"","forceshow":true,"showtitle":true,"hidenamespace":false,"template":false,"title":"","label":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"locations":[{"text":"

354

Proposed Work Scope for the Rail Topic Group  

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

Proposed Task Plan for TEC Rail Topic Group Status: Active DOE Leads: Office of Civilian Radioactive Waste Management (OCRWM), Office of National Transportation, Jay Jones and Alex Thrower Start Date: September 22, 2005 Purpose: The purpose of the Transportation External Coordinating (TEC) Working Group's Rail Topic Group (RTG) is to provide stakeholder perspectives and feedback to the Office of National Transportation (ONT) in the Department of Energy's (DOE) Office of Civilian Radioactive Waste Management (OCRWM) regarding topics of common interest concerning operating practices, logistical constraints, and other rail- related issues affecting the development and deployment of a safe, secure, and efficient system for transporting spent fuel (SNF) and high-level radioactive waste (HLW) to a

355

Federal Energy Management Program: Publications - Ordered by Topic  

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

Publications - Ordered by Topic Publications - Ordered by Topic FEMP provides numerous publications and resources to assist Federal agencies in energy management initiatives. Below are a select group of these resources organized by category. For additional resources, please browse the full FEMP Web site. Annual Reports Distributed Energy Resources/ Combined Heat and Power Energy Awareness/Outreach for Federal Facilities Energy-Efficient Products Energy Savings Performance Contracts Federal Legislation, Regulation, and Guidance Federal Fleets FEMP Focus Newsletter FEMP Programs/Miscellaneous Heating and Cooling Labs21 Life-Cycle Costing Lighting New Construction/Retrofits New Technologies Operations and Maintenance Renewable Energy Sustainable Design and Operations Utility Energy Services Contracts

356

Program Program Organization Country Region Topic Sector Sector  

Open Energy Info (EERE)

Program Organization Country Region Topic Sector Sector Program Organization Country Region Topic Sector Sector Albania Enhancing Capacity for Low Emission Development Strategies EC LEDS Albania Enhancing Capacity for Low Emission Development Strategies EC LEDS United States Agency for International Development USAID United States Environmental Protection Agency United States Department of Energy United States Department of Agriculture United States Department of State Albania Southern Asia Low emission development planning LEDS Energy Land Climate Algeria Clean Technology Fund CTF Algeria Clean Technology Fund CTF African Development Bank Asian Development Bank European Bank for Reconstruction and Development EBRD Inter American Development Bank IDB World Bank Algeria South Eastern Asia Background analysis Finance Implementation

357

Studies of Immobilized Homogeneous Metal Catalysts on Silica Supports  

SciTech Connect (OSTI)

The tethered, chiral, chelating diphosphine rhodium complex, which catalyzes the enantioselective hydrogenation of methyl-{alpha}-acetamidocinnamate (MAC), has the illustrated structure as established by {sup 31}P NMR and IR studies. Spectral and catalytic investigations also suggest that the mechanism of action of the tethered complex is the same as that of the untethered complex in solution. The rhodium complexes, [Rh(COD)H]{sub 4}, [Rh(COD){sub 2}]{sup +}BF{sub 4}{sup -}, [Rh(COD)Cl]{sub 2}, and RhCl{sub 3} {center_dot} 3H{sub 2}O, adsorbed on SiO{sub 2} are optimally activated for toluene hydrogenation by pretreatment with H{sub 2} at 200 C. The same complexes on Pd-SiO{sub 2} are equally active without pretreatments. The active species in all cases is rhodium metal. The catalysts were characterized by XPS, TEM, DRIFTS, and mercury poisoning experiments. Rhodium on silica catalyzes the hydrogenation of fluorobenzene to produce predominantly fluorocyclohexane in heptane and 1,2-dichloroethane solvents. In heptane/methanol and heptane/water solvents, hydrodefluorination to benzene and subsequent hydrogenation to cyclohexane occurs exclusively. Benzene inhibits the hydrodefluorination of fluorobenzene. In DCE or heptane solvents, fluorocyclohexane reacts with hydrogen fluoride to form cyclohexene. Reaction conditions can be chosen to selectively yield fluorocyclohexane, cyclohexene, benzene, or cyclohexane. The oxorhenium(V) dithiolate catalyst [-S(CH{sub 2}){sub 3}s-]Re(O)(Me)(PPh{sub 3}) was modified by linking it to a tether that could be attached to a silica support. Spectroscopic investigation and catalytic oxidation reactivity showed the heterogenized catalyst's structure and reactivity to be similar to its homogeneous analog. However, the immobilized catalyst offered additional advantages of recyclability, extended stability, and increased resistance to deactivation.

Keith James Stanger

2003-05-31T23:59:59.000Z

358

Exploiting Neoteric Solvents for Sustainable Catalysis and Reaction Engineering: Opportunities and Challenges  

Science Journals Connector (OSTI)

Several megaton catalytic processes (such as homogeneous hydroformylation of higher olefins, epoxidation of light olefins, and p-xylene oxidation to produce terephthalic acid) exist that produce the essential chemical intermediates for everyday products but present sustainability challenges with respect to reducing environmental footprints and enhancing energy efficiency. ... Effective integration of these elements into a sustainable technology requires a multiscale approach. ... The key challenge for reactor engineering is to establish the scientifically based sustainable technologies necessary for meeting the future energy, environmental, and materials needs of the world. ...

Bala Subramaniam

2010-09-10T23:59:59.000Z

359

The saddle-node of nearly homogeneous wave trains in reaction-diffusion systems  

E-Print Network [OSTI]

The saddle-node of nearly homogeneous wave trains in reaction-diffusion systems Jens D homogeneous oscillations created in the bifurcation, we investigate existence and stability of wave trains trains and determine their stability on the unbounded real line. We confirm that the accompanying wave

Scheel, Arnd

360

Thermal Decomposition of Dichlorosilane Investigated by Pulsed Laser Powered Homogeneous Pyrolysis  

E-Print Network [OSTI]

of vacuum flash pyrolysis of SiH 2Cl2. Ban and Gilbert6 observed SiCl2 by mass spectrometry under sili- conThermal Decomposition of Dichlorosilane Investigated by Pulsed Laser Powered Homogeneous Pyrolysis powered homogeneous pyrolysis of dichlorosilane are reported. Pyrolyses at temperatures of 1350 to 1700 K

Swihart, Mark T.

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

An FFT-based Galerkin method for homogenization of periodic media  

Science Journals Connector (OSTI)

In 1994, Moulinec and Suquet introduced an efficient technique for the numerical resolution of the cell problem arising in homogenization of periodic media. The scheme is based on a fixed-point iterative solution to an integral equation of the Lippmann-Schwinger ... Keywords: Conjugate gradients, Fourier transform, Galerkin approximation, Heterogeneous media, Numerical homogenization, Trigonometric polynomials

Jaroslav Vond?ejc, Jan Zeman, Ivo Marek

2014-08-01T23:59:59.000Z

362

CERNA WORKING PAPER SERIES Spatial price homogeneity as a mechanism to reduce the threat of  

E-Print Network [OSTI]

CERNA WORKING PAPER SERIES Spatial price homogeneity as a mechanism to reduce the threat price homogeneity as a mechanism to reduce the threat of regulatory intervention in locally monopolistic to retaliations from local elected officials. When investor-owned monopolies are exposed to this threat

Paris-Sud XI, Université de

363

Homogeneous, dual layer, solid state, thin film deposition for structural and/or electrochemical characteristics  

DOE Patents [OSTI]

Solid state, thin film, electrochemical devices (10) and methods of making the same are disclosed. An exemplary device 10 includes at least one electrode (14) and an electrolyte (16) deposited on the electrode (14). The electrolyte (16) includes at least two homogenous layers of discrete physical properties. The two homogenous layers comprise a first dense layer (15) and a second porous layer (16).

Pitts, J. Roland; Lee, Se-Hee; Tracy, C. Edwin; Li, Wenming

2014-04-08T23:59:59.000Z

364

Mechanisms of Homogeneous Nucleation of Polymers of Sickle Cell Anemia Hemoglobin in Deoxy State  

E-Print Network [OSTI]

Mechanisms of Homogeneous Nucleation of Polymers of Sickle Cell Anemia Hemoglobin in Deoxy State, TX 77204-4004, USA The primary pathogenic event of sickle cell anemia is the polymerization reserved. Keywords: sickle cell anemia; hemoglobin S polymerization; fiber nucleation; homogeneous

Vekilov, Peter

365

Shape from Contour: Straight Homogeneous Generalized Cylinders and Constant Cross Section Generalized Cylinders  

Science Journals Connector (OSTI)

Abstract¿ We analyze the properties of Straight Homogeneous Generalized Cylinders (SHGCs) and Constant Cross Section Generalized Cylinders (CGCs), and derive the types of symmetries that the limb boundaries and cross sections of these objects produce ... Keywords: Shape from contour, staright homogeneous generalized cones, constant cross section generalized cones, symmetry analysis, shape constraints.

Faith Ulupinar; Ramakant Nevatia

1995-02-01T23:59:59.000Z

366

VIBRATION OF RIGID BODIES ON NON-HOMOGENEOUS SEMI-INFINITE ELASTIC MEDIA  

Science Journals Connector (OSTI)

......November 1973 research-article Articles VIBRATION OF RIGID BODIES ON NON-HOMOGENEOUS...problems arising in the theory of the vibration of rigid bodies on non-homogeneous...dealt with the simplest torsional mode vibration. Three cases are considered here: vertical......

A. O. AWOJOBI

1973-11-01T23:59:59.000Z

367

Abstract 64: Development of homogeneous non-radioactive assays for studying histone 3 methyltransferases and demethylases  

Science Journals Connector (OSTI)

...positives/negatives). In this study, we describe homogeneous (mix-and-read) assays for measuring the catalytic activity of...homogeneous assay (AlphaLISA) and time-resolved fluorescence energy transfer (LANCE). The EZH2 complex (which methylates histone...

Mireille Caron; Julie Blouin; Claire Normand; Anne Labonté; Hendrick Plante; Mathieu Arcand; Lucille Beaudet; and Jaime Padrós

2011-04-15T23:59:59.000Z

368

advanced stomach cancer: Topics by E-print Network  

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

advanced stomach cancer First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 aallll IIrreell aanndd...

369

ASTRONOMY 2895 TOPICS IN ASTROPHYSICS Autumn Semester 2012  

E-Print Network [OSTI]

ASTRONOMY 2895 ­ TOPICS IN ASTROPHYSICS SYLLABUS Autumn Semester 2012 Course coordinator: Professor Bradley Peterson Office: 4055 McPherson Laboratory, 292-2022 E-mail: peterson@astronomy.ohio-state.edu Webpage URL: http://www.astronomy.ohio-state.edu/~peterson/Ast2895/ Classroom: 3094 Smith Laboratory Class

Peterson, Bradley M.

370

Multimedia news digger on emerging topics from social streams  

Science Journals Connector (OSTI)

With the overwhelming information from social media networks and news portals, it is crucial to provide users a complete package of visual and textual information with popular interests automatically. To this concern, we present a news detection and ... Keywords: co-clustering, cross media, emerging topic detection

Bing-Kun Bao; Weiqing Min; Jitao Sang; Changsheng Xu

2012-10-01T23:59:59.000Z

371

Verification and validation of detonation simulation: topical review  

E-Print Network [OSTI]

Verification and validation of detonation simulation: topical review Joseph M. Powers Department and Reactive Systems Irvine, California 28 July 2011 23rd ICDERS ­ Irvine, California V&V of Detonation 28 July 2011 1 / 29 #12;Outline 1 Some semantics and some provocation 2 Some overly brief detonation discourse

372

SPECIAL TOPICS SPRING 2015 Doing Business in China  

E-Print Network [OSTI]

SPECIAL TOPICS ­ SPRING 2015 Doing Business in China 22:553:671:40 (06596) See a China most people never see! Take advantage of a unique opportunity to see China from an entirely different perspective and sweet but intense in terms of the breadth and depth of exposure to China.... ­ Deepak Coming to China

Lin, Xiaodong

373

Accelerators, Beams And Physical Review Special Topics - Accelerators And Beams  

SciTech Connect (OSTI)

Accelerator science and technology have evolved as accelerators became larger and important to a broad range of science. Physical Review Special Topics - Accelerators and Beams was established to serve the accelerator community as a timely, widely circulated, international journal covering the full breadth of accelerators and beams. The history of the journal and the innovations associated with it are reviewed.

Siemann, R.H.; /SLAC

2011-10-24T23:59:59.000Z

374

Preface: Special Topic on Interfacial and Confined Water  

SciTech Connect (OSTI)

This Special Topic on the Chemical Physics of Interfacial and Confined Water contains a collection of original research papers that showcase recent theoretical and experimental advances in the field. These papers provide a timely discussion of fundamental aspects of interfacial and confined water that are important in both natural environments and engineered applications.

Molinero, Valeria; Kay, Bruce D.

2014-11-14T23:59:59.000Z

375

Paper # P45 Topic: Soot US Combustion Meeting  

E-Print Network [OSTI]

Paper # P45 Topic: Soot 5th US Combustion Meeting Organized by the Western States Section potentials obtained from second order Møller-Plesset per- turbation (MP2) and Dunning's consistent basis sets of the direct cyclization reaction at high temperature and for a wide range of 1 #12;5th US Combustion Meeting

Pitsch, Heinz

376

1 Background 1.1 Topic of research  

E-Print Network [OSTI]

1 Background 1.1 Topic of research Mathematical quantitative tools (like probabil- ity theory analyses on the basis of these meth- ods. 1.2 Academic and industrial con- text Interference in a security section 1.3). Applications of this work can be found in large scale, mission critical, security related

Hunt, Sebastian

377

Lecture 20: NPCompleteness II Main Topics of this Lecture  

E-Print Network [OSTI]

Lecture 20: NP­Completeness II Main Topics of this Lecture 1. Hamiltonian Cycle Problem. CLRS pp # # NPC. In this lecture, we will consider two problems involving Hamiltonian cycles. 2 #12; Hamiltonian Cycle Problem DHamCyc: Given an undirected graph G = (V, E), is there a Hamiltonian cycle in G? see

Golin, Mordecai J.

378

Advanced Topics in Workflow Management: Issues, Requirements, and Solutions  

E-Print Network [OSTI]

, flexible workflow management, workflow analysis 1. Introduction In recent years, a variety of approaches1 Advanced Topics in Workflow Management: Issues, Requirements, and Solutions Wil M.P. van der Systems Group Department of Computer Science Westfälische Wilhelms-Universität Münster Einsteinstrasse 62

van der Aalst, Wil

379

IST EPFL Joint doctoral Initiative Thesis Topic Proposal Form  

E-Print Network [OSTI]

IST ­ EPFL Joint doctoral Initiative Thesis Topic Proposal Form TITLE: Pump-turbines with variable of the use of turbines and pump-turbines with variable speed drives in pressurized water pipe systems (e Numerical description of the characteristic curves of pumps/pump-turbines based on rated conditions

Instituto de Sistemas e Robotica

380

Spring 2014 Course Announcement BTRY 7210 Topics in Quantitative Genomics  

E-Print Network [OSTI]

discussion during the semester. Topics that will be considered will include: probability and statistics: Jason Mezey Biological Statistics and Computational Biology Time: Tues. 12:20-1:10 PM Room: 224 Weill / 4830) and/or background in statistics and/or background in eQTL, GWAS or related genetic mapping

Keinan, Alon

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

Retro: concept-based clustering of biomedical topical sets  

Science Journals Connector (OSTI)

......other topics following a standard approach. As shown in...of the algorithm. We plan to do this in future...clustering algorithms. In: Mining Text Data-Aggarwal...et al. The WEKA data mining software: an update...Data clustering: a review. ACM Comput. Surveys......

Lana Yeganova; Won Kim; Sun Kim; W. John Wilbur

2014-08-01T23:59:59.000Z

382

Topic 5: Renewable Power 1Networking and Distributed Systems  

E-Print Network [OSTI]

Communications and Control in Smart Grid 10 · Wave power is the energy from ocean surface waves. · Orbital motion the device to the ocean floor to hold it. cable Power modules Tubular section #12;Wave Energy Converter DrTopic 5: Renewable Power 1Networking and Distributed Systems Department of Electrical & Computer

Mohsenian-Rad, Hamed

383

NICTA Advanced Course Advanced Topics in Software Verification  

E-Print Network [OSTI]

COMP 4161 NICTA Advanced Course Advanced Topics in Software Verification Gerwin Klein, June: § Declare a set of functions with signatures (e.g. plus, zero) § give them a name (e.g. c) § Have syntax 'a :: c for: type 'a supports the operations of c § Can write abstract polymorphic functions that use plus

Klein, Gerwin

384

Paper # A02 Topic: Laminar Flames US Combustion Meeting  

E-Print Network [OSTI]

been focused on synthetic fuel gas (syngas) combustion. Syngas is derived from coal throughPaper # A02 Topic: Laminar Flames 1 5th US Combustion Meeting Organized by the Western States Section of the Combustion Institute and Hosted by the University of California at San Diego March 25

Seitzman, Jerry M.

385

Statistics and Related Topics in Single-Molecule Biophysics  

E-Print Network [OSTI]

Statistics and Related Topics in Single-Molecule Biophysics Hong Qian1 and S.C. Kou2 1 Department macromolecules one at a time in action, the field of single- molecule biophysics has witnessed extensive growth in both experiments and theory since then. A distinct feature of single-molecule biophysics

Borenstein, Elhanan

386

CAPUT DARK ENERGY TOPICS, 2013 1. The Cosmological Constant  

E-Print Network [OSTI]

waves rule Physics Today, april 2008, 44 - Colless M. The WiggleZ Dark Energy Survey KIAS workshop 2008 Redshift Surveys ApJ 633, 575 - Seo H-J, Eisenstein D.J., 2005 Probing Dark Energy with Baryonic AcousticCAPUT DARK ENERGY TOPICS, 2013 1 #12;1. The Cosmological Constant - The acceleration

Weijgaert, Rien van de

387

TOPICAL PAPER Potential Synergies and Challenges in Refining Cellulosic Biomass  

E-Print Network [OSTI]

TOPICAL PAPER Potential Synergies and Challenges in Refining Cellulosic Biomass to Fuels, Chemicals that can reduce greenhouse gas emissions, enhance energy security, improve the economy, dispose of such products, and sugar costs are predicted to drop with plant size as a result of economies of scale

California at Riverside, University of

388

Small Business Innovation Research (SBIR) FY 2014 Phase I topics for the Funding Opportunity Announcement (FOA).  

Office of Energy Efficiency and Renewable Energy (EERE)

Selected Selected topic and subtopics contained in this document are designated as Technology Transfer Opportunities (TTOs).

389

Topic Distillation with Query-Dependent Link Connections and Page Characteristics  

E-Print Network [OSTI]

6 Topic Distillation with Query-Dependent Link Connections and Page Characteristics MINGFANG WU about a topic. Finding such results is called topic distillation. Previous research has shown statistics. This article presents a new approach to improve topic distillation by exploring the use

Wu, Mingfang

390

11th Topical conference high-temperature plasma diagnostics. Book of abstracts  

SciTech Connect (OSTI)

This report contains abstracts from the 11th topical conference on high-temperature plasma diagnostics.

NONE

1996-06-01T23:59:59.000Z

391

A Computational Approach to Homogenizing Nickel-Based Single Crystal Alloys  

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

Computational Approach to Homogenizing Nickel-Based Computational Approach to Homogenizing Nickel-Based Single Crystal Alloys Contact NETL Technology Transfer Group techtransfer@netl.doe.gov May 2013 Significance * Provides significantly diminished processing costs, including reduced energy consumption and throughput times, and increased availability of capital equipment such as furnaces, due to shorter heat treatments * Generates superior Ni-based superalloys with improved performance in downstream applications * Provides extreme flexibility, allowing for modification to meet the differing constraints of individual production facilities and the level of homogenization desired

392

Environment/Health/Safety/Security (EHSS): Tool Box Safety Topics  

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

Tool Box Safety Topics Tool Box Safety Topics A Review of Haz com standards A Single Second Accident Prevention Acetone Use and Care Aerial Work Platforms Afterthoughts and Regrets Alcohol & the Job Allergies, Antihistamines Appreciating the Hazards, Oxyacetylene Attitude and Behavior Avoid Common Office Injuries Avoiding Electrical Shocks Back Care Back Injury Prevention Backing into Trouble Basic Machine Safety Battery Charging Hazards Be Cautious with Sulfuric Acid Be Prepared for Emergencies Bench & Pedestal Grinders Blood Borne Pathogens Carbon Monoxide Care for Half-Mask Respirators Carelessness Cargo Dock Safety CDT's-How you prevent them Chocking and Blocking Cold Medication.Drowsiness Cold Weather Hazards for Propane Powered Vehicles Come-a-Longs, Hoists & Chains Common Sense & Accidents

393

Topic Index to the DOE Administrative Records Disposition Schedules  

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

5/21/07 TOPICINDEXTODOEADMINSCHEDULES 5/21/07 TOPICINDEXTODOEADMINSCHEDULES Topic Index to the DOE Administrative Records Disposition Schedules (excluding the GRS Schedules) Topic Schedule Item [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z] A Academic/Outreach Program 1 44 Access Request Files 18 6 Accountable Officers' Files 6 1 Accounting Administrative Files 6 5 Administrative Claims Files 6 10 Administrative Training Records 1 29.2 Administrative Issuances 16 1 Administrative - All Other copies of Administrative Issuances 16 1.6 Administrative Grievance, Disciplinary, and Adverse Action Files 1 30 Americans with Disabilities Act 1 42 Apprenticeship Program Files 1 45 Architectural Models 17 7

394

TEC Working Group Topic Groups Rail | Department of Energy  

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

Rail Rail TEC Working Group Topic Groups Rail The Rail Topic Group has the responsibility to identify and discuss current issues and concerns regarding rail transportation of radioactive materials by the Department of Energy (DOE). The group's current task is to examine different aspects of rail transportation including inspections, tracking and radiation monitoring, planning and process, and review of lessons learned. Ultimately, the main goal for members will be to assist in the identification of potential rail routes for shipments to Yucca Mountain, in a manner that will contribute to a safe, dynamic, and flexible transportation system. The identification of potential routes from reactor sites and DOE facilities will serve as an important first step in transportation planning, examining alternative routes, and getting feedback

395

Research topics related to ESI | OpenEI Community  

Open Energy Info (EERE)

Research topics related to ESI Research topics related to ESI Home > Groups > Energy Systems Integration Qinsun's picture Submitted by Qinsun(35) Member 15 November, 2012 - 13:55 ESI MarketsIncentives · Modeling and optimization of multiple energy carriers [2-6] · Renewable generation [3, 7] · Impact of PHEV [8, 9] · Multiple generations (Distributed) (cogeneration; trigeneration) [10-15] · Environmental impact[15-17] · Storage[4] · National Energy System[18] · Cost analysis[19] · Market analysis (supply and demand)[15, 20, 21] · Grid impact [22] · Reliability[23] · Finance[24] · Microgrids · Integration within the power system (DERs) (demand response and storage by Ookie) · Value of energy storage in reserve(Drury, E.; Denholm, P.;

396

Alexis Park Hotel, Las Vegas Topic Group Meeting Participants were:  

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

Notes Tuesday, January 20, 1998 8:00-11:30 a.m. Notes Tuesday, January 20, 1998 8:00-11:30 a.m. Alexis Park Hotel, Las Vegas Topic Group Meeting Participants were: Audrey Adamson, UETC Daren Gilbert, State of Nevada James Baranski, State of New York Phil Marbut, Canadian Pacific Railway Kevin Blackwell, US DOT/FRA Bruce Marriott, US DOT/FRA Mike Butler, UETC Kevin Miller, CSX Transportation Sandy Covi, Union Pacific RR Markus Popa, US DOE-OCRWM Ray English, US DOE-NR David Schoendorfer, Norfolk Southern RR Bob Fronczak, AAR John Tijan, US DOT/FRA The group convened at approximately 8:00 a.m. Mr. Butler distributed a meeting agenda, welcomed participants and introduced himself as the new Rail Topic Group lead and facilitator. He introduced Item I, "Existing Business"; specifically the two matrices tasked to the Group by

397

US Support Program Topical Meetings 1999 to 2008  

SciTech Connect (OSTI)

In 1999, the International Safeguards Project Office began organizing topical workshops to explore technical issues facing the International Atomic Energy Agency's Department of Safeguards. Representatives from IAEA member states including the United States, national laboratories and companies were invited to the workshops to discuss the technical issues. In some cases professional facilitators were hired to lead the discussions and in some cases business gaming techniques were employed. Since 1999, the following topics have been addressed Data Communication Technologies (1999), Information Security (2000), Design and Testing for High Reliability (2001), Standardization and Integration of Unattended and Remote Monitoring Systems (2002), Roadmapping: Surveillance (2003), IAEA Seals Technology Roadmapping Workshop (2004), Turning Information Into Knowledge (2004), Safeguards Tools of the Future (2005), and Advanced Sensors for Safeguards (2007). This paper will review the scope of the workshops and summarize their results.

Pepper,S.

2008-06-10T23:59:59.000Z

398

Preface: Special Topic on Advances in Density Functional Theory  

SciTech Connect (OSTI)

This Special Topic Issue on the Advances in Density Functional Theory, published as a celebration of the fifty years of density functional theory, contains a retrospective article, a perspective article, and a collection of original research articles that showcase recent theoretical advances in the field. It provides a timely discussion reflecting a cross section of our understanding, and the theoretical and computational developments, which have significant implications in broad areas of sciences and engineering.

Yang, Weitao [Department of Chemistry and Department of Physics, Duke University, Durham, North Carolina 27708 (United States)] [Department of Chemistry and Department of Physics, Duke University, Durham, North Carolina 27708 (United States)

2014-05-14T23:59:59.000Z

399

Selected topics in the evolution of low-mass stars  

E-Print Network [OSTI]

Low-mass stars play a key role in many different areas of astrophysics. In this article, I provide a brief overview of the evolution of low-mass stars, and discuss some of the uncertainties and problems currently affecting low-mass stellar models. Emphasis is placed on the following topics: the solar abundance problem, mass loss on the red giant branch, and the level of helium enrichment associated to the multiple populations that are present in globular clusters.

Catelan, M

2012-01-01T23:59:59.000Z

400

Molecular-scale, Three-dimensional Non-Platinum Group Metal Electrodes for Catalysis of Fuel Cell Reactions  

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

Molecular-scale, Three-dimensional Non-Platinum Group Molecular-scale, Three-dimensional Non-Platinum Group Metal Electrodes for Catalysis of Fuel Cell Reactions John B. Kerr Lawrence Berkeley National Laboratory (LBNL) September 30, 2009 Team Members: Adam Weber, Rachel Segalman, Robert Kostecki, Jeff Reimer, John Arnold, Martin Head-Gordon (LBNL). Piotr Zelenay, James Boncella, Yu Seung Kim, Neil Henson, Jerzy Chlistunoff (LANL). Steve Hamrock, Radoslav Atanasoski (3M) Budget: DOE share - $9.58MM over four years; 3M share - in-kind over four years. 2 Objectives 1) Demonstrate that non-platinum group metal catalysts can be used for oxygen reduction in polymer-coated electrode structures based on polyelectrolyte membranes. 2) Incorporate catalysts into polymer binders of composite electrodes for the construction of MEAs to demonstrate that this

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

Boron-nitrogen-hydrogen (BNH) compounds: recent developments in hydrogen storage, applications in hydrogenation and catalysis, and new syntheses  

SciTech Connect (OSTI)

The strong efforts devoted to the exploration of BNH compounds for hydrogen storage have led to impressive advances in the field of boron chemistry. This review summarizes progress in this field from three aspects. It starts with the most recent developments in using BNH compounds for hydrogen storage, covering NH3BH3, B3H8¯ containing compounds, and CBN compounds. The following section then highlights interesting applications of BNH compounds in hydrogenation and catalysis. The last part is focused on breakthroughs in the syntheses and discovery of new BNH organic analogues. The role of N?H?+•••H?-?B dihydrogen interactions in molecule packing, thermal hydrogen evolution, and syntheses is also discussed within the review. Part of this research is supported by the U.S. Department of Energy’s Basic Energy Sciences, Division of Chemical Sciences, Biosciences and Geosciences. Pacific Northwest National Laboratory is operated by Battelle.

Huang, Zhenguo; Autrey, Thomas

2012-11-15T23:59:59.000Z

402

Charged particles in higher dimensional homogeneous gravitational field: self-energy and self-force  

Science Journals Connector (OSTI)

A problem of self-energy and self-force for a charged point-like particle in a higher dimensional homogeneous gravitational field is considered. We study two cases, when a particle has the usual electric charg...

Valeri P. Frolov; Andrei Zelnikov

2014-10-01T23:59:59.000Z

403

On mechanisms of formation of environmentally harmful compounds in homogeneous combustors  

Science Journals Connector (OSTI)

A kinetic model is developed for calculating the emission characteristics of homogeneous combustors using methane and synthesis gas (syngas) as a fuel. The model is ... OH in laminar flames and in the Bunsen burner

V. E. Kozlov; A. M. Starik; N. S. Titova…

2013-09-01T23:59:59.000Z

404

Rank and Set Restrictions for Homogeneity Analysis in R: The "homals" Package  

E-Print Network [OSTI]

Rank and Set Restrictions for Homogeneity Analysis in R:various extensions in terms of rank restrictions (nonlinearSection 2.1) in terms of rank restrictions (Section 2.2) and

Mair, Patrick; Leeuw, Jan de

2008-01-01T23:59:59.000Z

405

Rank and Set Restrictions for Homogeneity Analysis in R: The "homals" Package  

E-Print Network [OSTI]

Rank and Set Restrictions for Homogeneity Analysis in R:various extensions in terms of rank restrictions (nonlinearSection 2.1) in terms of rank restrictions (Section 2.2) and

Patrick Mair; Jan de Leeuw

2011-01-01T23:59:59.000Z

406

Thermodynamics In Einstein equation, the energy momentum tensor of homogeneous, isotropic  

E-Print Network [OSTI]

Thermodynamics In Einstein equation, the energy momentum tensor of homogeneous, isotropic fluid using the 1st law of thermodynamics, T = (U/S)V . Since U = V is expressed in terms of the temperature

Murayama, Hitoshi

407

Homogeneous geodesics and the critical points of the restricted Finsler function  

Science Journals Connector (OSTI)

In this paperwe study the set of homogeneous geodesics of a left-invariant Finsler metric on Lie groups. We first give a simple criterion that characterizes geodesic vectors. We extend J. Szenthe’s result on h...

Parastoo Habibi; Dariush Latifi…

2011-02-01T23:59:59.000Z

408

Metal carbonyl-hydrosilane reactions and hydrosilation catalysis. Final report for period May 1, 1995 - August 14, 1999  

SciTech Connect (OSTI)

Manganese carbonyl complexes serve as hydrosilation precatalysts for selectively transforming a carbonyl group into a doxy methylene or a fully reduced methylene group. Substrates of interest include (1) aldehydes, ketones, carboxylic acids, silyl esters, and esters, and (2) their organometallic acyl counterparts. Two types of manganese precatalysts have been reported: (a) alkyl and acyl complexes (L)(CO){sub 4}MnR [L = CO, PPh{sub 3}; R = COCH{sub 3}, COPh, CH{sub 3}] and (b) halides (CO){sub 5}MnX and [(CO){sub 4}MnX]{sub 2} (X = Br, I). The former promote hydrosilation and deoxygenation catalysis; the latter promote dehydrogenative silation of alcohols and carboxylic acids as well as hydrosilation and deoxygenation of some metallocarboxylic acid derivatives. In every case studied, these Mn precatalysts are far more reactive or selective than traditional Rh(l) precatalysts. The reaction chemistry of the above and other Mn alkyl complexes with hydrosilanes was studied in order to probe catalysis mechanism(s). Thus, Mn(CO){sub 5} methyl, benzyl, acetyl, and benzoyl (4 p-substituents) complexes reacted with hydrosilines by four different mechanisms, which were established. A noteworthy development was that the methyl and benzoyl complexes gave moderate yields of a new ({eta}{sup 2}-Si-H) silane adduct (CO){sub 4}Mn(SiMe{sub 2}Ph)(H-SiMe{sub 2}Ph), which is stable in the presence of excess silane. This silane adduct promotes all three catalytic reactions; its extraordinary activity and potential selectivity are under study.

Cutler, Alan R.

2001-04-14T23:59:59.000Z

409

Integration of geodesic flows on homogeneous spaces: the case of a wild lie group  

E-Print Network [OSTI]

We obtain necessary and sufficient conditions for the integrability in quadratures of geodesic flows on homogeneous spaces $M$ with invariant and central metrics. The proposed integration algorithm consists in using a special canonical transformation in the space $T^*M$ based on constructing the canonical coordinates on the orbits of the coadjoint representation and on the simplectic sheets of the Poisson algebra of invariant functions. This algorithm is applicable to integrating geodesic flows on homogeneous spaces of a wild Lie group.

A. A. Magazev; I. V. Shirokov

2007-03-21T23:59:59.000Z

410

Intrinsic reactivity feedback characteristics for safety analysis of heterogeneous and homogeneous LMFBR core designs  

SciTech Connect (OSTI)

This paper presents a comparison of the intrinsic reactivity feedback characteristics of homogeneous and heterogeneous LMFBR designs. The comparisons are shown for a 1000 MWth LMFBR core design. However, the applicability of the conclusions drawn from these comparisons are generic to larger LMFBRs. Consistent sodium void worth distributions have been calculated for heterogeneous and homogeneous 1000 MWth LMFBR core designs. The basic calculations were performed with three dimensional models using ENDF/B-III cross section data and first order perturbation theory.

Doncals, R.A.; Lake, J.A.

1982-01-01T23:59:59.000Z

411

Two dimensional finite element analysis of homogenization and failure in plain weave textile composites  

E-Print Network [OSTI]

TWO DIMENSIONAL FINITE ELEMENT ANALYSIS OF HOMOGENIZATION AND FAILURE IN PLAIN WEAVE TEXTILE COMPOSITES A Thesis by VEERARAGHAVA GOPAL KONDAGUNTA Submitted to the Office of Graduate Studies of Texas ARM University In partial fulffllment... of the requirements for the degree of MASTER OF SCIENCE August 1993 Major Subject: Aerospace Engineering TWO DIMENSIONAL FINITE ELEMENT ANALYSIS OF HOMOGENIZATION AND FAILURE IN PLAIN WEAVE TEXTILE COMPOSITES A Thesis by VEERARAGHAVA GOPAL KONDAGUNTA...

Kondagunta, Veeraraghava Gopal

2012-06-07T23:59:59.000Z

412

Testing the gamma-ray burst variability/peak luminosity correlation on a Swift homogeneous sample  

E-Print Network [OSTI]

We test the gamma-ray burst correlation between temporal variability and peak luminosity of the $\\gamma$-ray profile on a homogeneous sample of 36 Swift/BAT GRBs with firm redshift determination. This is the first time that this correlation can be tested on a homogeneous data sample. The correlation is confirmed, as long as the 6 GRBs with low luminosity (tested on low-luminosity GRBs. Our results show that these GRBs are definite outliers.

D. Rizzuto; C. Guidorzi; P. Romano; S. Covino; S. Campana; M. Capalbi; G. Chincarini; G. Cusumano; D. Fugazza; V. Mangano; A. Moretti; M. Perri; G. Tagliaferri

2007-04-19T23:59:59.000Z

413

The effect of temperature and homogenization pressure on enzymatic activity in cheese whey  

E-Print Network [OSTI]

THE EFFECT OF TEMPERATURE AND HOMOGENIZATION PRESSURE ON ENZYMATIC ACTIVITY IN CHEESE WHEY A Thesis by MARIA YANINA DEL CAWvKN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirement... for the degree of MASTER OF SCIENCE August 1995 Major Subject; Food Science and Technology THE EFFECT OF TEMPERATURE AND HOMOGENIZATION PRESSURE ON ENZYMATIC ACTIVITY IN CHEESE WHEY A Thesis by MARIA YANINA DEL CARMEN Submitted to the Office of Graduate...

Del Carmen, Maria Yanina

1995-01-01T23:59:59.000Z

414

Evolution of the Surface Science of Catalysis from Single Crystals to Metal Nanoparticles under Pressure  

SciTech Connect (OSTI)

Vacuum studies of metal single crystal surfaces using electron and molecular beam scattering revealed that the surface atoms relocate when the surface is clean (reconstruction) and when it is covered by adsorbates (adsorbate induced restructuring). It was also discovered that atomic steps and other low coordination surface sites are active for breaking chemical bonds (H-H, O=O, C-H, C=O and C-C) with high reaction probability. Investigations at high reactant pressures using sum frequency generation (SFG)--vibrational spectroscopy and high pressure scanning tunneling microscopy (HPSTM) revealed bond breaking at low reaction probability sites on the adsorbate-covered metal surface, and the need for adsorbate mobility for continued turnover. Since most catalysts (heterogeneous, enzyme and homogeneous) are nanoparticles, colloid synthesis methods were developed to produce monodispersed metal nanoparticles in the 1-10 nm range and controlled shapes to use them as new model catalyst systems in two-dimensional thin film form or deposited in mesoporous three-dimensional oxides. Studies of reaction selectivity in multipath reactions (hydrogenation of benzene, cyclohexene and crotonaldehyde) showed that reaction selectivity depends on both nanoparticle size and shape. The oxide-metal nanoparticle interface was found to be an important catalytic site because of the hot electron flow induced by exothermic reactions like carbon monoxide oxidation.

Somorjai, Gabor A.; Park, Jeong Y.

2008-03-06T23:59:59.000Z

415

Organusulfur Catalysis With Reduced Molybdenum Sulfides Containing the Mo6S8 Cluster  

SciTech Connect (OSTI)

Industrial synthesis of sulfur-containing organic chemicals basically focuses on the broad categories of mercaptans (thiols), alkylsulfides (thioethers), polysulfides, and thiophenes. Of the organo-sulfur compounds produced, by far the most important in terms of quantities produced is methyl mercaptan (methanethiol or MeSH), which is produced mainly for the downstream production of methionine and methanesulfonyl chloride. Higher thiols are also used in the manufacture of rubber and plastics as polymerization regulators, chain transfer agents, or initiators. Other important organosulfur chemicals are dimethyl sulfide (DMS) and dimethyl disulfide (DMDS), both of which are used extensively for presulfiding of industrial hydroprocessing catalysts, and substituted thiophenes which are used as intermediates for production of agrochemicals, dyes, and pharmaceuticals. Thiols are produced commercially at the rate of about 10{sup 4} ton/yr from hydrogen sulfide (H{sub 2}S) and alcohols or olefins, using homogeneous free-radical synthesis, or heterogeneous catalysts based on solid acids or supported metal oxides and/or sulfides. Despite this large production rate, and the industrial importance of the organosulfur compounds, only limited research has been devoted to the development of new catalytic materials for their synthesis. Additionally, for most organosulfur catalytic reactions, only limited information exists about reaction mechanisms, active sites, adsorbed surface species, and especially the nature of the catalysts under reaction conditions.

Thomas Jay Paskach

2002-08-27T23:59:59.000Z

416

SBIR/STTR Release 2 Topics Announced-Includes Hydrogen and Fuel...  

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

Release 2 Topics Announced-Includes Hydrogen and Fuel Cells SBIRSTTR Release 2 Topics Announced-Includes Hydrogen and Fuel Cells October 31, 2014 - 12:05pm Addthis The 2015 Small...

417

TRIBAL ISSUES TOPIC GROUP MEETING SUMMARY JULY 13, 1999 Crowne  

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

JULY 13, 1999 Crowne JULY 13, 1999 Crowne Plaza Center City Hotel, Philadelphia, PA Kevin Blackwell (U.S. Department of Transportation/Federal Rail Administration) (DOT/FRA) presented an overview of the topic group's discussion. The status of the DOT/FRA's response to DOE's inquiry about the tribal right to inspect rail shipments is still an open issue. At the time of the July meeting, the response was in the final stages of review in the Secretary of Transportation's Legal Division. The response will be forwarded to DOE's Office of Civilian Radioactive Waste Management. The draft response is an

418

 Topic Group Reports  DOE Program Summaries  

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

1999 Meeting 1999 Meeting  Topic Group Reports  DOE Program Summaries  Discussion of SNF Storage Initiatives & Transportations Issues  Discussion of WIPP Opening  Summary of Breakout Sessions The Transportation External Coordination (TEC) Working Group held its 15th semi-annual meeting July 14-15, 1999 in Philadelphia, Pennsylvania. Over 150 members, participants, and observers representing state, tribal, and local governments, regional groups, industry and professional organizations, and the Department of Energy (DOE) met to address a variety of issues related to DOE's transportation activities for radioactive materials. A number of Departmental programs with transportation components were

419

DOE Transportation Protocols Topic Group Jacksonville, Florida January 20,  

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

Jacksonville, Florida January 20, Jacksonville, Florida January 20, 1999 Meeting Notes and Action Items: The first meeting of the Transportation External Coordination Working Group (TEC/WG) Department of Energy (DOE) Transportation Protocols Topic Group was held at the Radisson Riverwalk Hotel in Jacksonville, FL on January 20, 1999. Mona Williams, Director of DOE's National Transportation Program, Albuquerque Office, welcomed the participants and asked them to introduce themselves (a list of participants with affiliations and addresses is attached). Following the roundtable introductions, Ms. Williams briefly stated the meeting's purpose, which was to discuss the process of protocols development and how review and input from TEC/WG participants could enhance

420

DOE Transportation Protocols Topic Group Conference Call Summary May 13,  

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

Conference Call Summary May 13, Conference Call Summary May 13, 1999 The Transportation External Coordination Working Group (TEC/WG) Protocols Topic Group held a conference call on May 13, 1999, to discuss the status of U.S. Department of Energy (DOE) transportation protocols currently under development, and related issues. Participants on the call included: Mona Williams, DOE National Transportation Program-Albuquerque; Ken Niles, Oregon representative, Western Interstate Energy Board; Phillip Paull, Council of State Governments-Northeastern Conference; Ron Ross, Western Governors' Association; Lisa Sattler, Council of State Governments-Midwestern Office; Alex Thrower, Urban Energy & Transportation Corporation (UETC); and Elissa Turner, DOE-Office of Civilian Radioactive Waste Management.

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

Enhanced Topic Distillation using Text, Markup Tags, and Hyperlinks Soumen Chakrabarti  

E-Print Network [OSTI]

Enhanced Topic Distillation using Text, Markup Tags, and Hyperlinks Soumen Chakrabarti Mukul Joshi Vivek Tawde IIT Bombay ABSTRACT Topic distillation is the analysis of hyperlink graph structure to authorities). Topic distillation is becoming common in Web search engines, but the best-known algorithms model

Chakrabarti, Soumen

422

Jordan Boyd-Graber. Linguistic Extensions of Topic Models. 2010. @phdthesis{Boyd-Graber-2010,  

E-Print Network [OSTI]

Jordan Boyd-Graber. Linguistic Extensions of Topic Models. 2010. @phdthesis{Boyd-Graber-2010, School = {Princeton University}, Author = {Jordan Boyd-Graber}, Year = {2010}, Title = {Linguistic Extensions of Topic Models}, } 1 #12;Linguistic Extensions of Topic Models Jordan Boyd-Graber A Dissertation

Boyd-Graber, Jordan

423

Special Topics on Energy Use in Household Transportation  

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

Home Page Welcome to the Energy Information Administration's Residential Transportation Energy Consumption Home Page. If you need assistance in viewing this page, please call (202) 586-8800 Home Page Welcome to the Energy Information Administration's Residential Transportation Energy Consumption Home Page. If you need assistance in viewing this page, please call (202) 586-8800 Home > Transportation Home Page > Special Topics Special Topics Change in Method for Estimating Fuel Economy for the 1988 and subsequent RTECS (Released 09/12/2000) Can Household Members Accurately Report How Many Miles Their Vehicles Are Driven? (Released 08/03/2000) Calculate your Regional Gasoline Costs of Driving using the “Transportation Calculator” updated for new model years! Choose your car or SUV and see the gasoline part of the cost of driving in various parts of the country using EIA's current weekly prices. This application uses DOE/EPA's Fuel Economy Guide to set the MPG, but you can change it to compare your estimate of your car's mpg to the average of everyone else who takes the test. (Released 04/11/2000; Updated Yearly for Fuel Economies and Weekly for Fuel Prices)

424

DOE-TSPP-11, Technical Standards Program Topical Committees - July 1, 2009  

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

July July 1, 2009 DOE-TSPP-11, Technical Standards Program Topical Committees - July 1, 2009 Technical Standards Program Procedures (TSPP) - August 26, 2009 This procedure describes how topical committees are organized and recognized under the Technical Standards Program. This procedure applies to all DOE Headquarters and field organizations, management and operating contractors, and laboratories (hereafter referred to collectively as "DOE Components") working to the latest revision of DOE Order 252.1, "Technical Standards Program." DOE-TSPP-11, Technical Standards Program Topical Committees - July 1, 2009 More Documents & Publications DOE-TSPP-11, Technical Standards Program Topical Committees - August 1, 2000 TECHNICAL STANDARDS PROGRAM TOPICAL COMMITTEES

425

DOE-TSPP-11, Technical Standards Program Topical Committees - August 1,  

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

August 1, 2000 DOE-TSPP-11, Technical Standards Program Topical Committees - August 1, 2000 Technical Standards Program Procedures (TSPP) This procedure describes how topical committees are organized and recognized under the Technical Standards Program. This procedure applies to all DOE Headquarters and field organizations, management and operating contractors, and laboratories (hereafter referred to collectively as "DOE Components") working to the latest revision of DOE Order 252.1, "Technical Standards Program." DOE-TSPP-11, Technical Standards Program Topical Committees - August 1, 2000 More Documents & Publications TECHNICAL STANDARDS PROGRAM TOPICAL COMMITTEES DOE-TSPP-11, Technical Standards Program Topical Committees - July 1, 2009

426

Crystal Structure of (+)-[delta]-Cadinene Synthase from Gossypium arboreum and Evolutionary Divergence of Metal Binding Motifs for Catalysis  

SciTech Connect (OSTI)

(+)-{delta}-Cadinene synthase (DCS) from Gossypium arboreum (tree cotton) is a sesquiterpene cyclase that catalyzes the cyclization of farnesyl diphosphate in the first committed step of the biosynthesis of gossypol, a phytoalexin that defends the plant from bacterial and fungal pathogens. Here, we report the X-ray crystal structure of unliganded DCS at 2.4 {angstrom} resolution and the structure of its complex with three putative Mg{sup 2+} ions and the substrate analogue inhibitor 2-fluorofarnesyl diphosphate (2F-FPP) at 2.75 {angstrom} resolution. These structures illuminate unusual features that accommodate the trinuclear metal cluster required for substrate binding and catalysis. Like other terpenoid cyclases, DCS contains a characteristic aspartate-rich D{sup 307}DTYD{sup 311} motif on helix D that interacts with Mg{sub A}{sup 2+} and Mg{sub C}{sup 2+}. However, DCS appears to be unique among terpenoid cyclases in that it does not contain the 'NSE/DTE' motif on helix H that specifically chelates Mg{sub B}{sup 2+}, which is usually found as the signature sequence (N,D)D(L,I,V)X(S,T)XXXE (boldface indicates Mg{sub B}{sup 2+} ligands). Instead, DCS contains a second aspartate-rich motif, D{sup 451}DVAE{sup 455}, that interacts with Mg{sub B}{sup 2+}. In this regard, DCS is more similar to the isoprenoid chain elongation enzyme farnesyl diphosphate synthase, which also contains two aspartate-rich motifs, rather than the greater family of terpenoid cyclases. Nevertheless, the structure of the DCS-2F-FPP complex shows that the structure of the trinuclear magnesium cluster is generally similar to that of other terpenoid cyclases despite the alternative Mg{sub B}{sup 2+} binding motif. Analyses of DCS mutants with alanine substitutions in the D{sup 307}DTYD{sup 311} and D{sup 451}DVAE{sup 455} segments reveal the contributions of these segments to catalysis.

Gennadios, Heather A.; Gonzalez, Veronica; Di Costanzo, Luigi; Li, Amang; Yu, Fanglei; Miller, David J.; Allemann, Rudolf K.; Christianson, David W.; (UPENN); (Cardiff); (UC)

2009-09-11T23:59:59.000Z

427

Determining whether metals nucleate homogeneously on graphite: A case study with copper  

SciTech Connect (OSTI)

We observe that Cu clusters grow on surface terraces of graphite as a result of physical vapor deposition in ultrahigh vacuum. We show that the observation is incompatible with a variety of models incorporating homogeneous nucleation and calculations of atomic-scale energetics. An alternative explanation, ion-mediated heterogeneous nucleation, is proposed and validated, both with theory and experiment. This serves as a case study in identifying when and whether the simple, common observation of metal clusters on carbon-rich surfaces can be interpreted in terms of homogeneous nucleation. We describe a general approach for making system-specific and laboratory-specific predictions.

Appy, David [Ames Laboratory; Lei, Huaping [Ames Laboratory; Han, Yong [Ames Laboratory; Wang, Cai-Zhuang [Ames Laboratory; Tringides, Michael C [Ames Laboratory; Shao, Dahai [Ames Laboratory; Kwolek, Emma J [Iowa State University; Evans, J W [Ames Laboratory; Thiel, P A [Ames Laboratory

2014-11-01T23:59:59.000Z

428

Future geodesic completeness of some spatially homogeneous solutions of the vacuum Einstein equations in higher dimensions  

E-Print Network [OSTI]

It is known that all spatially homogeneous solutions of the vacuum Einstein equations in four dimensions which exist for an infinite proper time towards the future are future geodesically complete. This paper investigates whether the analogous statement holds in higher dimensions. A positive answer to this question is obtained for a large class of models which can be studied with the help of Kaluza-Klein reduction to solutions of the Einstein-scalar field equations in four dimensions. The proof of this result makes use of a criterion for geodesic completeness which is applicable to more general spatially homogeneous models.

Arne Goedeke; Alan D. Rendall

2010-02-21T23:59:59.000Z

429

Two stroke homogenous charge compression ignition engine with pulsed air supplier  

DOE Patents [OSTI]

A two stroke homogenous charge compression ignition engine includes a volume pulsed air supplier, such as a piston driven pump, for efficient scavenging. The usage of a homogenous charge tends to decrease emissions. The use of a volume pulsed air supplier in conjunction with conventional poppet type intake and exhaust valves results in a relatively efficient scavenging mode for the engine. The engine preferably includes features that permit valving event timing, air pulse event timing and injection event timing to be varied relative to engine crankshaft angle. The principle use of the invention lies in improving diesel engines.

Clarke, John M. (Chillicothe, IL)

2003-08-05T23:59:59.000Z

430

NERC | U.S. DOE Office of Science (SC)  

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

NERC NERC Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights News & Events Publications Contact BES Home Centers NERC Print Text Size: A A A RSS Feeds FeedbackShare Page Non-equilibrium Energy Research Center (NERC) Director(s): Bartosz A. Grzybowski Lead Institution: Northwestern University Mission: To understand self-organization in dissipative, far-from-equilibrium systems and to use this knowledge to synthesize adaptive, reconfigurable materials for energy storage and transduction. Research Topics: catalysis (homogeneous), catalysis (heterogeneous), thermal conductivity, thermoelectric, bio-inspired, energy storage (including batteries and capacitors), superconductivity, mechanical behavior, charge transport, materials and chemistry by design, synthesis (novel materials), synthesis

431

emc2 | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

emc2 emc2 Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights News & Events Publications Contact BES Home Centers emc2 Print Text Size: A A A RSS Feeds FeedbackShare Page Energy Materials Center at Cornell (EMC2) Director(s): Hector D. Abruna Lead Institution: Cornell University Mission: To advance the science of energy conversion and storage by understanding and exploiting fundamental properties of active materials and their interfaces. Research Topics: catalysis (homogeneous), catalysis (heterogeneous), energy storage (including batteries and capacitors), hydrogen and fuel cells, defects, charge transport, membrane, materials and chemistry by design, synthesis (novel materials), synthesis (self-assembly), synthesis (scalable

432

CABS | U.S. DOE Office of Science (SC)  

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

CABS CABS Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights News & Events Publications Contact BES Home Centers CABS Print Text Size: A A A RSS Feeds FeedbackShare Page Center for Advanced Biofuel Systems (CABS) Director(s): Jan Jaworski Lead Institution: Donald Danforth Plant Science Center Mission: To generate the fundamental knowledge required to increase the efficiency of photosynthesis and production of energy-rich molecules in plants. Research Topics: catalysis (homogeneous), catalysis (heterogeneous), solar (fuels), photosynthesis (natural and artificial), biofuels (including algae and biomass), bio-inspired, charge transport, carbon capture, synthesis (novel materials) Materials Studied: MATERIALS: biological (DNA, protein)

433

ANSER | U.S. DOE Office of Science (SC)  

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

ANSER ANSER Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights News & Events Publications Contact BES Home Centers ANSER Print Text Size: A A A RSS Feeds FeedbackShare Page Argonne-Northwestern Solar Energy Research (ANSER) Center Director(s): Michael R. Wasielewski Lead Institution: Northwestern University Mission: To revolutionize our understanding of molecules, materials and methods necessary to create dramatically more efficient technologies for solar fuels and electricity production. Research Topics: catalysis (homogeneous), catalysis (heterogeneous), solar (photovoltaic), solar (fuels), photosynthesis (natural and artificial), bio-inspired, hydrogen and fuel cells, electrodes - solar, defects, charge transport, spin dynamics, membrane, materials and chemistry by design, optics,

434

CCHF | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

CCHF CCHF Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights News & Events Publications Contact BES Home Centers CCHF Print Text Size: A A A RSS Feeds FeedbackShare Page Center for Catalytic Hydrocarbon Functionalization (CCHF) Director(s): T. Brent Gunnoe Lead Institution: University of Virginia Mission: To develop, validate, and optimize new methods to rearrange the bonds of hydrocarbons, implement enzymatic strategies into synthetic systems, and design optimal environments for catalysts that can be used to reversibly functionalize hydrocarbons, especially for more efficient use of natural gas including low temperature conversion to liquid fuels. Research Topics: catalysis (homogeneous), catalysis (heterogeneous), bio-inspired, hydrogen

435

CME | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

CME CME Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights News & Events Publications Contact BES Home Centers CME Print Text Size: A A A RSS Feeds FeedbackShare Page Center for Molecular Electrocatalysis Director(s): R. Morris Bullock Lead Institution: Pacific Northwest National Laboratory Mission: To understand, design and develop molecular electrocatalysts for solar fuel production and use. Research Topics: catalysis (homogeneous), catalysis (heterogeneous), solar (fuels), bio-inspired, energy storage (including batteries and capacitors), hydrogen and fuel cells, charge transport, materials and chemistry by design, synthesis (novel materials) Materials Studied: MATERIALS: metal Experimental and Theoretical Methods: X-ray diffraction and scattering, density functional theory (DFT), quantum

436

June2004TopicalReportANS-Drilling.doc  

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

Drilling and Data Acquisition Planning Drilling and Data Acquisition Planning Topical Report Cooperative Agreement Award Number DE-FC-01NT41332 Submitted to the United States Department of Energy National Energy Technology Laboratory ADD Document Control by BP Exploration (Alaska), Inc. Robert Hunter (Principal Investigator) P.O. Box 196612 Anchorage, Alaska 99519-6612 Email: hunterrb@bp.com robert.hunter@asrcenergy.com Tel: (907)-339-6377 with University of Alaska Fairbanks Shirish Patil (Principal Investigator) 425 Duckering Building P.O. Box 755880 Fairbanks, Alaska 99775-5880 and Arizona Board of Regents University of Arizona, Tucson Robert Casavant (Principal Investigator) Dept. Mining and Geological Engineering Rm. 245, Mines and Metallurgy Bldg. #12 1235 E. North Campus Dr., POB 210012

437

Topic B Awardee: Eastern Interconnection States' Planning Council |  

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

Eastern Interconnection States' Eastern Interconnection States' Planning Council Topic B Awardee: Eastern Interconnection States' Planning Council The Eastern Interconnection States' Planning Council (EISPC) is an historic endeavor initially funded by an award from the United States Department of Energy (DOE) pursuant to a provision of the American Recovery and Reinvestment Act (ARRA). The goal is to create an unprecedented collaborative among the states in the Eastern Interconnection. Comprised of public utility commissions, Governors' offices, energy offices, and other key government representatives, this collaboration will foster and produce consistent and coordinated direction to the regional and interconnection-level analyses and planning. Significant state input and direction increases the probability that the outputs will be useful to the

438

Topic Area 2: Data Gathering and Analysis | Open Energy Information  

Open Energy Info (EERE)

2: Data Gathering and Analysis 2: Data Gathering and Analysis Jump to: navigation, search Geothermal ARRA Funded Projects for Topic Area 2: Data Gathering and Analysis Loading map... {"format":"googlemaps3","type":"ROADMAP","types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"limit":200,"offset":0,"link":"all","sort":[""],"order":[],"headers":"show","mainlabel":"","intro":"","outro":"","searchlabel":"\u2026 further results","default":"","geoservice":"google","zoom":false,"width":"600px","height":"350px","centre":false,"layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","icon":"","visitedicon":"","forceshow":true,"showtitle":true,"hidenamespace":false,"template":false,"title":"","label":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"locations":[{"text":"

439

Microsoft Word - 40913 Topical Report Task 1.doc  

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

GAS TURBINE REHEAT USING IN-SITU COMBUSTION GAS TURBINE REHEAT USING IN-SITU COMBUSTION Topical Report: Task 1 - Blade Path Aerodynamics by T.E. Lippert D.M. Bachovchin April 30, 2004 Cooperative Agreement No. DE-FC26-00NT40913 Siemens Westinghouse Power Corporation 4400 Alafaya Trail Orlando, FL 32826 and P.G.A. Cizmas Texas A&M University College Station, TX 77843-3141 Prepared for U.S. Department of Energy National Energy Technology Laboratory 3610 Collins Ferry Road P. O. Box 880 Morgantown, WV 26507-0880 Charles Alsup - DOE/NETL Project Manager ii DISCLAIMER This report was prepared as an account of work sponsored by the United States Government. Neither the United States nor the United States Department of Energy, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal

440

Topic Area 1: Technology Demonstration Projects | Open Energy Information  

Open Energy Info (EERE)

1: Technology Demonstration Projects 1: Technology Demonstration Projects Jump to: navigation, search Geothermal ARRA Funded Projects for Topic Area 1: Technology Demonstration Projects Loading map... {"format":"googlemaps3","type":"ROADMAP","types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"limit":200,"offset":0,"link":"all","sort":[""],"order":[],"headers":"show","mainlabel":"","intro":"","outro":"","searchlabel":"\u2026 further results","default":"","geoservice":"google","zoom":false,"width":"600px","height":"350px","centre":false,"layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","icon":"","visitedicon":"","forceshow":true,"showtitle":true,"hidenamespace":false,"template":false,"title":"","label":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"locations":[{"text":"

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

TRIBAL ISSUES TOPIC GROUP MEETING SUMMARY JACKSONVILLE, FL  

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

JACKSONVILLE, FL JACKSONVILLE, FL JANUARY 20, 1999 Mr. Kevin Blackwell (USDOT/FRA) updated the group on the status of the DOT response to DOE's inquiry about the tribal right to inspect rail shipments. The response was in the final stages of review in the General Counsel's office and is expected by July 1999. The Group has added a representative from the NRC General Counsel's office, as a topic group member, to help keep abreast of developments in the NRC's upcoming draft rulemaking regarding tribes and advanced notification. The group also discussed the research that has been conducted on the issue of developing a "umbrella grant" from DOE to states and tribes. Tribes concerns differ from State concerns because of disparities in available infrastructure to administer grants and funding equity issues.

442

TEC Working Group Topic Groups Manual Review | Department of Energy  

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

Manual Review Manual Review TEC Working Group Topic Groups Manual Review This group is responsible for the update of DOE Manual 460.2-1, Radioactive Material Transportation Practices Manual. This manual was issued on September 23, 2002, and establishes a set of standard transportation practices for U.S. Department of Energy (DOE) programs to use in planning and executing offsite shipments of radioactive materials including radioactive waste. The manual was developed in response to recommendations from various DOE programs and external stakeholders. A writing group was convened to evaluate the shipping practices being used or planned for use throughout the Department, document them, and, where appropriate, standardize them. The results of this effort are reflected

443

Homogeneous Bottleneck Model of Matrix-assisted Ultraviolet Laser Desorption of  

E-Print Network [OSTI]

Akos Vertes", R. Gijbels Department of Chemistry, University of Antwerp (UIA), Universiteitsplein 1, B volatilization are examined in a simple model. The key material factors appear to be a low heat of sublimation to the sublimation induction period. The model is homogeneous in that the energy density is taken to be uniform

Vertes, Akos

444

Genetically Engineered Elastin-Protein A Fusion as a Universal Platform for Homogeneous,  

E-Print Network [OSTI]

Genetically Engineered Elastin-Protein A Fusion as a Universal Platform for Homogeneous, Phase-separation Immunoassay Jae-Young Kim,, Sean O'Malley,§ Ashok Mulchandani,*, and Wilfred Chen*, Department of Chemical, California 92521, and Hawaii Biotech Inc., Aiea, Hawaii 96701 A simple and universal platform for competitive

Chen, Wilfred

445

Traveltime approximation for a reflected wave in a homogeneous anisotropic elastic layer  

Science Journals Connector (OSTI)

......reflected wave in a homogeneous anisotropic elastic layer M. Zillmer...A review of wave motion in anisotropic and cracked elastic-media...1995. Seismic anisotropy of shales, J. geophys. Res., 100...body waves in arbitrarily anisotropic media, in, Propagation of......

M. Zillmer; B. M. Kashtan

2002-10-01T23:59:59.000Z

446

Lattice Boltzmann simulations of decaying homogeneous isotropic turbulence Huidan Yu,1,  

E-Print Network [OSTI]

Lattice Boltzmann simulations of decaying homogeneous isotropic turbulence Huidan Yu,1, * Sharath S is investigated to evaluate the capability of the lattice Boltzmann method in turbulence. In the inertial frame that the lattice Boltzmann method captures im- portant features of decaying turbulence. DOI: 10.1103/PhysRevE.71

Luo, Li-Shi

447

Detailed Analysis and Control Issues of Homogeneous Charge Compression Ignition (HCCI)  

SciTech Connect (OSTI)

Homogeneous charge compression ignition (HCCI) is a new combustion technology that may develop as an alternative to diesel engines with high efficiency and low NOx and particulate matter emissions. This paper describes the HCCI research activities being currently pursued at Lawrence Livermore National Laboratory and at the University of California Berkeley. Current activities include analysis as well as experimental work.

Aceves, Salvador M.; Flowers, Daniel L.; Martinez-Frias, Joel; Espinosa-Loza, Francisco; Dibble, Robert

2002-08-25T23:59:59.000Z

448

Data-driven Techniques to Estimate Parameters in the Homogenized Energy Model for Shape Memory Alloys  

E-Print Network [OSTI]

, ferroelectric, and ferromagnetic materials. The energy origin of the model was originally investigated for SMA]. The original mod- els determined the equilibrium phase using the Gibbs energy to predict the mesoscopic (orData-driven Techniques to Estimate Parameters in the Homogenized Energy Model for Shape Memory

449

The Effect of Flow Unsteadiness on the Homogeneous Nucleation of Water Droplets in Steam Turbines  

Science Journals Connector (OSTI)

...Unsteadiness on the Homogeneous Nucleation of Water Droplets in Steam Turbines Abhijit Guha John Young The paper describes a new theory of the formation and growth of water droplets in multistage steam turbines. The essence of the theory is that large-scale static...

1994-01-01T23:59:59.000Z

450

Spatial homogenization of thermal feedback regions in Monte Carlo reactor calculations  

SciTech Connect (OSTI)

An integrated thermal-hydraulic feedback module has previously been developed for the Monte Carlo transport solver, MC21. The module incorporates a flexible input format that allows the user to describe heat transfer and coolant flow paths within the geometric model at any level of spatial detail desired. The effect that the varying levels of spatial homogenization of thermal regions has on the accuracy of the Monte Carlo simulations is examined in this study. Six thermal feedback mappings are constructed from the same geometric model of the Calvert Cliffs core. The spatial homogenization of the thermal regions is varied, giving each scheme a different level of detail, and the adequacy of the spatial homogenization is determined based on the eigenvalue produced by each Monte Carlo calculation. The purpose of these numerical experiments is to determine the level of detail necessarily to accurately capture the thermal feedback effect on reactivity. Several different core models are considered: axial-flow only, axial and lateral flow, asymmetry due to control rod insertion, and fuel heating (temperature -dependent cross sections). The thermal results generated by the MC21 thermal feedback module are consistent with expectations. Based upon the numerical experiments conducted it is concluded that the amount of spatial detail necessary to accurately capture the feedback effect on reactivity is relatively small. Homogenization at the assembly level for the Calvert Cliffs PWR model results in a similar power defect to that calculated with individual pin-cells modeled as explicit thermal regions. (authors)

Hanna, B. R.; Gill, D. F.; Griesheimer, D. P. [Bertis Atomic Power Laboratory, Bechtel Marine Propulsion Corporation, P.O. Box 79, West Mifflin, PA 15122 (United States)

2012-07-01T23:59:59.000Z

451

Enhanced HFIR overpower margin through improvements in fuel plate homogeneity inspection  

SciTech Connect (OSTI)

Fuel homogeneity inspection techniques used on the HFIR fuel plates have recently been improved through conversion of the X-ray inspection device to acquire, store, and process data digitally. This paper reports some early results from using the improved equipment and describes future plans for obtaining enhanced fuel thermal performance by exploiting this improved inspection capability.

Rothrock, R.B.; Hale, R.E.; Knight, R.W. [Oak Ridge National Lab., TN (United States); Cheverton, R.D.

1995-09-01T23:59:59.000Z

452

Discovering Homogeneous Regions in Spatial Data through Competition Slobodan Vucetic SVUCETIC@EECS.WSU.EDU  

E-Print Network [OSTI]

Discovering Homogeneous Regions in Spatial Data through Competition Slobodan Vucetic SVUCETIC for the analysis of heterogeneous spatial data is proposed. It is based on partitioning the data set into more. A number of experiments on artificial and real­life spatial data are performed to validate some as­ pects

Obradovic, Zoran

453

Discovering Homogeneous Regions in Spatial Data through Competition Slobodan Vucetic SVUCETIC@EECS.WSU.EDU  

E-Print Network [OSTI]

Discovering Homogeneous Regions in Spatial Data through Competition Slobodan Vucetic SVUCETIC, a supervised machine learning algorithm for the analysis of heterogeneous spatial data is proposed. It is based and accuracy is discussed. A number of experiments on artificial and real-life spatial data are performed

Vucetic, Slobodan

454

The evolution of a spatially homogeneous and isotropic universe filled with a collisionless gas  

E-Print Network [OSTI]

We review the evolution of a spatially homogeneous and isotropic universe described by a Friedmann-Robertson-Walker spacetime filled with a collisionless, neutral, simple, massive gas. The gas is described by a one-particle distribution function which satisfies the Liouville equation and is assumed to be homogeneous and isotropic. Making use of the isometries of the spacetime, we define precisely the homogeneity and isotropicity property of the distribution function, and based on this definition we give a concise derivation of the most general family of such distribution functions. For this family, we construct the particle current density and the stress-energy tensor and consider the coupled Einstein-Liouville system of equations. We find that as long as the distribution function is collisionless, homogenous and isotropic, the evolution of a Friedmann-Robertson-Walker universe exhibits a singular origin. Its future development depends upon the curvature of the spatial sections: spatially flat or hyperboloid universes expand forever and this expansion dilutes the energy density and pressure of the gas, while a universe with compact spherical sections reaches a maximal expansion, after which it reverses its motion and recollapses to a final crunch singularity where the energy density and isotropic pressure diverge. Finally, we analyze the evolution of the universe filled with the collisionless gas once a cosmological constant is included.

Francisco Astorga; Olivier Sarbach; Thomas Zannias

2014-06-14T23:59:59.000Z

455

Analysis of Molten Carbonate Fuel Cell Performance Using a Three-Phase Homogeneous Model  

E-Print Network [OSTI]

temperatures, nickel oxide dissolves in the melt. This slow loss of active material contributes to an increase as compared to nickel oxide. The search for alternate cathode materials could be simplified through the use-phase homogeneous model was developed to simulate the performance of the molten carbonate fuel cell MCFC cathode

Popov, Branko N.

456

DOI: 10.1002/cssc.201000142 Homogeneous Oxidation Reactions of Propanediols at Low  

E-Print Network [OSTI]

are consistent with chain propagation processes mediated by oxygen-containing radicals. The high acrolein selectivity in homogeneous 1,3-propane- diol oxidation led us to introduce the acrolein and H2O formed acrolein into acrylic acid with 90% yields (based on propanediol reactants). This com- bined process

Iglesia, Enrique

457

On the nonexistence of a Lobachevsky geometry model of an isotropic and homogeneous universe  

Science Journals Connector (OSTI)

According to the Einstein cosmological principle, our universe is homogeneous and isotropic, i.e. its curvature is constant at any point and in any direction. On large scales, when all local irregularities are ignored, this assumption has been confirmed ... Keywords: Gauss-Kronecker curvature, Lobachevsky and Riemannian geometry, geometric cosmology, manifolds, modelling, umbilic points

Michal K?ížek; Jana Pradlová

2003-01-01T23:59:59.000Z

458

ELECTRICAL IMPEDANCE MAMMOGRAPHY Forward problem for homogeneous and 3-D sphere  

E-Print Network [OSTI]

ELECTRICAL IMPEDANCE MAMMOGRAPHY Forward problem for homogeneous and 3-D sphere Jakub Vel Prague, October 15, 2014 J. Vel´imsk´y (CUP) Electrical Impedance Mammography Prague, 15.10.2014 1 / 26 and SH-FE discretization Remarks on the inverse problem Current status J. Vel´imsk´y (CUP) Electrical

Cerveny, Vlastislav

459

Statistical fracture modeling: crack path and fracture criteria with application to homogeneous and  

E-Print Network [OSTI]

Statistical fracture modeling: crack path and fracture criteria with application to homogeneous; accepted 23 January 2002 Abstract Analysis has been performed on fracture initiation near a crack in a brittle material with strength described by Weibull statistics. This nonlocal fracture model allows

Ritchie, Robert

460

Homogeneous Decomposition Mechanisms of Diethylzinc by Raman Spectroscopy and Quantum Chemical Calculations  

E-Print Network [OSTI]

for direct reaction products in an inverted, impinging-jet test reactor coupled to a Raman spectrometer. The homogeneous thermal decomposition of DEZn in N2 carrier was followed in an impinging-jet, up-flow reactor vibrational frequencies of DEZn, as well as anticipated intermediates and products. Comparison of the measured

Anderson, Timothy J.

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

Optimization of the structural Gabor functions in a homogeneous velocity model  

E-Print Network [OSTI]

Optimization of the structural Gabor functions in a homogeneous velocity model for a zero-o#11;set functions should be optimized, and the Gabor functions should form a frame. We present a simple attempt functions and the space{wavenumber lattice of their central points are optimized analytically

Cerveny, Vlastislav

462

Optimal Homogenization of Perfusion Flows in Microfluidic Bio-Reactors: A Numerical Study  

E-Print Network [OSTI]

Optimal Homogenization of Perfusion Flows in Microfluidic Bio-Reactors: A Numerical Study Fridolin of Denmark, DTU Nanotech, Kongens Lyngby, Denmark Abstract In recent years, the interest in small-scale bio-reactors microfluidic bio-reactors, we develop a general design of a continually feed bio- reactor with uniform

463

Coal Segregation Control for Meeting Homogeneity Z. Huang, R. Kumar J. Yingling, J. Sottile  

E-Print Network [OSTI]

Coal Segregation Control for Meeting Homogeneity Standards Z. Huang, R. Kumar J. Yingling, J were developed to control coal segre- gation to meet ash targets over large coal batches (e. g., a unit train of coal) while realizing high yields and economic savings. We have extended this work to address

Kumar, Ratnesh

464

Microfluidic Assembly of Homogeneous and Janus Colloid-Filled Hydrogel Granules  

E-Print Network [OSTI]

Microfluidic Assembly of Homogeneous and Janus Colloid-Filled Hydrogel Granules Robert F. Shepherd 23234 ReceiVed March 21, 2006. In Final Form: August 15, 2006 The microfluidic assembly of colloid.11 A new route to granulation is suggested by the emergence of microfluidic techniques that allow

Lewis, Jennifer

465

The Condensate Equation for non-homogeneous Andre F. Verbeure1  

E-Print Network [OSTI]

The Condensate Equation for non-homogeneous Bosons Andr´e F. Verbeure1 Institute for Theoretical)-condensation. This phe- nomenon is accompanied with spontaneous breaking of the translation symmetry down of the condensate equation for these systems. We discuss model applications. KEY WORDS: Bose- Einstein condensation

466

Homogeneity of precipitation series in the Netherlands and their trends in the past century  

E-Print Network [OSTI]

1 Homogeneity of precipitation series in the Netherlands and their trends in the past century T. A. Buishand, G. De Martino, J.N. Spreeuw and T. Brandsma Royal Netherlands Meteorological Institute (KNMI), De Bilt, The Netherlands ABSTRACT: The historical daily precipitation observations for the Netherlands

Brandsma, Theo

467

Phenomenology for the decay of energy-containing eddies in homogeneous MHD turbulence  

E-Print Network [OSTI]

Phenomenology for the decay of energy-containing eddies in homogeneous MHD turbulence Murshed of simple, one-point phenomenological models for the decay of energy-containing eddies phenomenology has been previously verified against experiments in wind tunnels, and certain experimentally

Oughton, Sean

468

DOE-TSPP-9-2013, DOE Technical Standards Program Topical Committees |  

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

9-2013, DOE Technical Standards Program Topical Committees 9-2013, DOE Technical Standards Program Topical Committees DOE-TSPP-9-2013, DOE Technical Standards Program Topical Committees Technical Standards Program Procedures (TSPP) - September 16, 2013 This procedure describes how topical committees are organized and recognized under the Technical Standards Program. This procedure applies to all Department of Energy (DOE) Headquarters and field organizations, management and operating contractors, and laboratories (hereafter referred to collectively as TSP participants) working to the latest revision of DOE Order (O) 252.1A, Technical Standards Program. DOE-TSPP-9-2013, DOE Technical Standards Program Topical Committees More Documents & Publications TECHNICAL STANDARDS PROGRAM TOPICAL COMMITTEES DOE-TSPP-8-2013, Converting DOE Technical Standards to Voluntary Consensus

469

Q&A on SBIR and STTR Topics FY 2015 Release 2  

Office of Energy Efficiency and Renewable Energy (EERE)

Questions and answers on the topics for Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) for fiscal year 2015, Release 2.

470

E-Print Network 3.0 - administration topical Sample Search Results  

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

The courses are consistent with the exam topics, are six weeks per module Source: Virginia Tech, Virginia Bioinformatics Institute, Influenze Outbreak Project Collection:...

471

COMMON CORE STATE STANDARDS Science Topic Outreach Posters (STOP) promote skills and learning processes detailed in the Common Core  

E-Print Network [OSTI]

Science Topic Outreach posters COMMON CORE STATE STANDARDS Science Topic Outreach Posters (STOP manner, the sequence of questions posed on Science Topic Outreach Posters intensifies in rigor to Science Topic Outreach Posters grow in complexity from simple selections (multiple-choice) to student

472

Tunable Solvents for Homogeneous Catalyst Recycle Jie Lu, Michael J. Lazzaroni, Jason P. Hallett, Andreas S. Bommarius,  

E-Print Network [OSTI]

Tunable Solvents for Homogeneous Catalyst Recycle Jie Lu, Michael J. Lazzaroni, Jason P. Hallett-0100 A novel class of tunable solvents facilitates recycle of homogeneous catalysts for both economic-soluble catalysts and moderately hydrophobic substrates can be run homoge- neously, with subsequent phase separation

473

Generation of large-scale vorticity in a homogeneous turbulence with a mean velocity shear Tov Elperin,* Nathan Kleeorin,  

E-Print Network [OSTI]

Generation of large-scale vorticity in a homogeneous turbulence with a mean velocity shear Tov by the gradient of the Reynolds stresses is studied. Generation of a mean vorticity in a homogeneous-induced'' deflection of equilibrium mean vorticity and ``Reynolds stress-induced'' generation of perturbations of mean

Elperin, Tov

474

Tropical Anvil Characteristics and Water Vapor of the Tropical Tropopause Layer (TTL): Impact of Homogeneous Freezing Parameterizations  

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

Heterogeneous and Homogeneous Freezing Heterogeneous and Homogeneous Freezing Parameterizations on Tropical Anvil Characteristics and Water Vapor Content of the TTL Jiwen Fan Climate Physics, Pacific Northwest National Laboratory Contributed by: Jennifer Comstock, Mikhail Ovtchinnikov, Sally McFarlane, and Greg McFarquhar OBJECTIVES Look into the effects of the commonly used heterogeneous and homogeneous freezing parameterizations on anvil properties and water vapor content in the TTL for the deep convective clouds developed in the contrasting environments. Examine the impact of the immersion-freezing on homogeneous freezing process. Homogeneous freezing parameterizations (HFPs) 1) Koop et al. (2000): J r depends on the water activity of the solution and is independent of the nature of solute.

475

Critical Dynamics of Spontaneous Symmetry Breaking in a Homogeneous Bose gas  

E-Print Network [OSTI]

We explore the dynamics of spontaneous symmetry breaking in a homogeneous system by thermally quenching an atomic gas with short-range interactions through the Bose-Einstein phase transition. Using homodyne matter-wave interferometry to measure first-order correlation functions, we verify the central quantitative prediction of the Kibble-Zurek theory, namely the homogeneous-system power-law scaling of the coherence length with the quench rate. Moreover, we directly confirm its underlying hypothesis, the freezing of the correlation length near the transition due to critical slowing down. Our measurements agree with beyond mean-field theory, and support the previously unverified expectation that the dynamical critical exponent for this universality class, which includes the $\\lambda$-transition of liquid $^4$He, is $z=3/2$.

Nir Navon; Alexander L. Gaunt; Robert P. Smith; Zoran Hadzibabic

2014-10-30T23:59:59.000Z

476

Homogenization approach for the transmission eigenvalue problem for periodic media and application to the inverse problem  

E-Print Network [OSTI]

We consider the interior transmission problem associated with the scattering by an inhomogeneous (possibly anisotropic) highly oscillating periodic media. We show that, under appropriate assumptions, the solution of the interior transmission problem converges to the solution of a homogenized problem as the period goes to zero. Furthermore, we prove that the associated real transmission eigenvalues converge to transmission eigenvalues of the homogenized problem. Finally we show how to use the first transmission eigenvalue of the period media, which is measurable from the scattering data, to obtain information about constant effective material properties of the periodic media. The convergence results presented here are not optimal. Such results with rate of convergence involve the analysis of the boundary correction and will be subject of a forthcoming paper.

Fioralba Cakoni; Houssem Haddar; Isaac Harris

2014-10-14T23:59:59.000Z

477

Analytical formulation of 3D dynamic homogenization for periodic elastic systems  

E-Print Network [OSTI]

Homogenization of the equations of motion for a three dimensional periodic elastic system is considered. Expressions are obtained for the fully dynamic effective material parameters governing the spatially averaged fields by using the plane wave expansion (PWE) method. The effective equations are of Willis form (Willis 1997) with coupling between momentum and stress and tensorial inertia. The formulation demonstrates that the Willis equations of elastodynamics are closed under homogenization. The effective material parameters are obtained for arbitrary frequency and wavenumber combinations, including but not restricted to Bloch wave branches for wave propagation in the periodic medium. Numerical examples for a 1D system illustrate the frequency dependence of the parameters on Bloch wave branches and provide a comparison with an alternative dynamic effective medium theory (Shuvalov 2011) which also reduces to Willis form but with different effective moduli.

A. N. Norris; A. L. Shuvalov; A. A. Kutsenko

2012-01-13T23:59:59.000Z

478

Some mismatches occurred when simulating fractured reservoirs as homogeneous porous media  

SciTech Connect (OSTI)

The understanding of transport processes that occur in naturally fractured geothermal systems is far from being complete. Often, evaluation and numerical simulations of fractured geothermal reservoirs, are carried out by assuming equivalent porous media and homogeneous petrophysical properties within big matrix blocks. The purpose of this paper, is to present a comparison between results obtained from numerical studies of a naturally fractured reservoir treated as a simple porous medium and the simulation of some real aspects of the fractured reservoir. A general conclusion outlines the great practical importance of considering even approximately, the true nature of such systems. Our results show that the homogeneous simplified evaluation of the energy resource in a fractured system, could result in unrealistic estimates of the reservoir capacity to generate electricity.

Mario Cesar Suarez Arriaga; Fernando Samaniego V.; Fernando Rodriguez

1996-01-24T23:59:59.000Z

479

Catalytic hydrogenation unit studies. Topical report No. 4  

SciTech Connect (OSTI)

The ebullated bed hydrotreater at the Advanced Coal Liquefaction R and D Facility in Wilsonville became fully operational during May 1981. This unit was installed to upgrade SRC product, expand the product slate flexibility, and improve hydrogen utilization efficiency. This topical report presents an analysis of the hydrotreater unit operating data from May 1981 (Run 228) to March 1982 (Run 236). During this period, SRC was produced from Kentucky 9 (Fies) coal and from Illinois 6 (Burning Star) coal and was processed using a commercially available cobalt-molybdenum hydrodesulfurizing catalyst manufactured by American Cyanamid Co. (HDS-1442B). The unit was operated over a fairly wide range of space velocities (1.1 to 2.2 lb/hr feed per lb catalyst) and reactor temperatures (650/sup 0/F to 830/sup 0/F). A total of twenty-six unit material balances, under varying operating conditions, were completed during this period. The daily operating and material balance data have been used for analysis and correlation. A three-lump first-order kinetic model has been developed to describe the steadystate behavior of the reactor. A catalyst deactivation model based on intrinsic activity, and rate of loss of this activity (separable decay) is proposed. These models, along with several heuristic correlations, were used to develop a computer simulation program which reasonably predicts product yields, product properties, and hydrogen consumption as a function of several process variables. Also presented is a general discussion of run results, product properties, catalyst selectivity, catalyst deactivation, H-donor activity of hydrotreated products, etc. 25 figures, 18 tables.

Lewis, H.E.

1982-11-01T23:59:59.000Z

480

Homogeneous-heterogeneous core evaluation and structural-material selection. [LMFBR  

SciTech Connect (OSTI)

The safe and economic operation of an LMFBR is dependent on many diverse and in some cases conflicting design considerations. In particular, the judicious choice of a reactor core design can play a significant role in meeting safety and economic constraints. The main interest of this study is to compare the relative merits of two core concepts, homogeneous and heterogeneous, with respect to their neutronic performance.

Orechwa, Y.; Su, S.F.

1982-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "topics catalysis homogeneous" 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

Non-homogeneous solutions of a Coulomb Schrödinger equation as basis set for scattering problems  

SciTech Connect (OSTI)

We introduce and study two-body Quasi Sturmian functions which are proposed as basis functions for applications in three-body scattering problems. They are solutions of a two-body non-homogeneous Schrödinger equation. We present different analytic expressions, including asymptotic behaviors, for the pure Coulomb potential with a driven term involving either Slater-type or Laguerre-type orbitals. The efficiency of Quasi Sturmian functions as basis set is numerically illustrated through a two-body scattering problem.

Del Punta, J. A.; Ambrosio, M. J.; Gasaneo, G. [Departamento de Física, Universidad Nacional del Sur, 8000 Bahía Blanca, Buenos Aires (Argentina)] [Departamento de Física, Universidad Nacional del Sur, 8000 Bahía Blanca, Buenos Aires (Argentina); Zaytsev, S. A. [Physics Department, Pacific National University, Khabarovsk 680035 (Russian Federation)] [Physics Department, Pacific National University, Khabarovsk 680035 (Russian Federation); Ancarani, L. U. [Théorie, Modélisation, Simulation, SRSMC, UMR CNRS 7565, Université de Lorraine, 57078 Metz (France)] [Théorie, Modélisation, Simulation, SRSMC, UMR CNRS 7565, Université de Lorraine, 57078 Metz (France)

2014-05-15T23:59:59.000Z

482

3D periodic dielectric composite homogenization based on the Generalized Source Method  

E-Print Network [OSTI]

The article encloses a new Fourier space method for rigorous optical simulation of 3D periodic dielectric structures. The method relies upon rigorous solution of Maxwell's equations in complex composite structures by the Generalized Source Method. Extremely fast GPU enabled calculations provide a possibility for an efficient search of eigenmodes in 3D periodic complex structures on the basis of rigorously obtained resonant electromagnetic response. The method is applied to the homogenization problem demonstrating a complete anisotropic dielectric tensor retrieval.

Shcherbakov, Alexey A

2015-01-01T23:59:59.000Z

483

Beam Homogeneity Dependence on the Magnetic Filter Field at the IPP Test Facility MANITU  

SciTech Connect (OSTI)

The homogeneity of the extracted current density from the large RF driven negative hydrogen ion sources of the ITER neutral beam system is a critical issue for the transmission of the negative ion beam through the accelerator and the beamline components. As a first test, the beam homogeneity at the IPP long pulse test facility MANITU is measured by means of the divergence and the stripping profiles obtained with a spatially resolved Doppler-shift spectroscopy system. Since MANITU is typically operating below the optimum perveance, an increase in the divergence corresponds to a lower local extracted negative ion current density if the extraction voltage is constant. The beam H{sub {alpha}} Doppler-shift spectroscopy is a rather simple tool, as no absolute calibration - both for the wavelength and the emission - is necessary. Even no relative calibration of the different used lines of sight is necessary for divergence and stripping profiles as these quantities can be obtained by the line broadening of the Doppler-shifted peak and the ratio of the integral of the stripping peak to the integral of the Doppler-shifted peak, respectively. The paper describes the H{sub {alpha}} MANITU Doppler-shift spectroscopy system which is now operating routinely and the evaluation methods of the divergence and the stripping profiles. Beam homogeneity measurements are presented for different extraction areas and magnetic filter field configurations both for Hydrogen and Deuterium operation; the results are compared with homogeneity measurements of the source plasma. The stripping loss measurements are compared with model calculations.

Franzen, P.; Fantz, U. [Max-Planck-Institut fuer Plasmaphysik, EURATOM Association, PO Box 1533, 85740 Garching (Germany)

2011-09-26T23:59:59.000Z

484

Real time search on the web: Queries, topics, and economic value Bernard J. Jansen a,  

E-Print Network [OSTI]

examine aggregate usage of the search engine, including number of users, queries, and terms. We term interest in a topic and the polling nature of real time queries. Concerning search topics geographical affinity, pointing to a location-based aspect to real time search. In terms of economic value, we

Jansen, James

485

Topic analysis of web user behavior using LDA model on proxy logs  

Science Journals Connector (OSTI)

We propose a web user profiling and clustering framework based on LDA-based topic modeling with an analogy to document analysis in which documents and words represent users and their actions. The main technical challenge addressed here is how to symbolize ... Keywords: latent dirichlet allocation, proxy logs based analysis, topic modeling, web user clustering

Hiroshi Fujimoto; Minoru Etoh; Akira Kinno; Yoshikazu Akinaga

2011-05-01T23:59:59.000Z

486

NVLAP Assessor Training Syllabus Self-Declaration of Review of Training Topics  

E-Print Network [OSTI]

NVLAP Assessor Training Syllabus Self-Declaration of Review of Training Topics Instructions: This syllabus provides the general topics required for training Lead Assessors and Technical Assessors, along with links to the respective training resources.* Please contact the Program Manager for any program

487

16:332:592 Optoelectronics II Contemporary Topics in Optoelectronics/Photonics  

E-Print Network [OSTI]

16:332:592 Optoelectronics II Contemporary Topics in Optoelectronics/Photonics Spring 2008, and semiconductor physics or solid state electronics or optoelectronics I (please contact the instructor if you in optoelectronics and photonics. Three topics for this year: (1) Photonic crystals: basic physics, fabrication

Jiang, Wei

488

IEMS 490: Special topics: Operations Research Modeling in Humanitarian and Non-Profit Logistics  

E-Print Network [OSTI]

IEMS 490: Special topics: Operations Research Modeling in Humanitarian and Non-Profit Logistics228) Course Description This course will cover a range of topics related to the modeling of logistics. Course material focuses on formulating complex logistics problems, teaching students to trans- late real

Smilowitz, Karen

489

An Investigation of Linguistic Features and Clustering Algorithms for Topical Document Clustering  

E-Print Network [OSTI]

An Investigation of Linguistic Features and Clustering Algorithms for Topical Document Clustering of document clustering. A sta­ tistical model for combining similarity information from mul­ tiple sources is described and applied to DARPA's Topic De­ tection and Tracking phase 2 (TDT2) data. This model, based

Gravano, Luis

490

An Investigation of Linguistic Features and Clustering Algorithms for Topical Document Clustering  

E-Print Network [OSTI]

An Investigation of Linguistic Features and Clustering Algorithms for Topical Document Clustering of document clustering. A sta- tistical model for combining similarity information from mul- tiple sources is described and applied to DARPA's Topic De- tection and Tracking phase 2 (TDT2) data. This model, based

Gravano, Luis

491

Evaluating Topic-Word Review Analysis for Understanding Student Peer Review Performance  

E-Print Network [OSTI]

Evaluating Topic-Word Review Analysis for Understanding Student Peer Review Performance Wenting of an application based on the topic terms. Previ- ously, we proposed RevExplore, an interactive peer-review analytic tool that supports teachers in making sense of large volumes of student peer reviews. To better

Litman, Diane J.

492

Linking topics of news and blogs with wikipedia for complementary navigation  

Science Journals Connector (OSTI)

We study complementary navigation of news and blog, where Wikipedia entries are utilized as fundamental knowledge source for linking news articles and blog feeds/posts. In the proposed framework, given a topic as the title of a Wikipedia entry, its Wikipedia ... Keywords: IR, Wikipedia, blog, news, topic analysis

Yuki Sato; Daisuke Yokomoto; Hiroyuki Nakasaki; Mariko Kawaba; Takehito Utsuro; Tomohiro Fukuhara

2008-03-01T23:59:59.000Z

493

OpinioNetIt: understanding the opinions-people network for politically controversial topics  

Science Journals Connector (OSTI)

The wikileaks documents or the economic crises in Ireland and Portugal are some of the controversial topics being played on the news everyday. Each of these topics has many different aspects, and there is no absolute, simple truth in answering questions ... Keywords: opinion mining, web information extraction

Rawia Awadallah; Maya Ramanath; Gerhard Weikum

2011-10-01T23:59:59.000Z

494

Public Perception of 13 Different Energy Topics analyzed in new Study |  

Open Energy Info (EERE)

Public Perception of 13 Different Energy Topics analyzed in new Study Public Perception of 13 Different Energy Topics analyzed in new Study Home > Groups > OpenEI Community Central Graham7781's picture Submitted by Graham7781(1992) Super contributor 27 December, 2012 - 14:27 consumer behavior Navigant OpenEI Pike Research Renewable Energy Report Pike Research, part of Navigant, recently released a White Paper that takes an in-depth view at public perception of 13 energy topics. The study uses a 1,000 person sample to show favorability and unfavorability energy topics such as transportation, renewable technology, nuclear, clean coal, and smart grid topics. Some of the highlights of the study are as follows: * Solar Energy had the highest number of respondents holding both "favorable" and "strongly favorable" opinions of any technology.

495

Microsoft Word - Security Topic Group Notes 3-14-06.doc  

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

Notes from Security Topic Group Meeting Notes from Security Topic Group Meeting March 14, 2006 Alex Thrower (OCRWM/ONT) welcomed the attendees to the Security Topic Group meeting and introduced new participants. He then initiated a brief discussion of two documents that had been submitted to members for review and comment - the current version of the Topic Group Workplan and the minutes from the most recent (February 21, 2006) conference call. He indicated that some comments had already been received and incorporated and he welcomed any additional comments. Mr. Thrower discussed the issue of security clearances within the TEC context. He acknowledged that there is a basic tension between the concept of TEC as an open forum and some security-related topics; however, he reiterated DOE's position that TEC will remain an

496

Property:Geothermal/ProjectTypeTopic2Count | Open Energy Information  

Open Energy Info (EERE)

ProjectTypeTopic2Count ProjectTypeTopic2Count Jump to: navigation, search Property Name Geothermal/ProjectTypeTopic2Count Property Type Number Description Number of Project Type Topic 2 values. Pages using the property "Geothermal/ProjectTypeTopic2Count" Showing 25 pages using this property. (previous 25) (next 25) A Air Cooling + 0 + D Directional Drilling Systems + 0 + Drilling Systems + 2 + E EGS Demonstration + 0 + F Fluid Imaging + 2 + Fracture Characterization Technologies + 0 + G Geophysical Exploration Technologies + 0 + Geothermal Analysis + 0 + Geothermal Data Development, Collection, and Maintenance + 0 + Geothermal Energy Production from Low Temperature Resources, Coproduced Fluids from Oil and Gas Wells, and Geopressured Resources + 0 + H High Temperature Cements + 0 +

497

Fuel loading and homogeneity analysis of HFIR design fuel plates loaded with uranium silicide fuel  

SciTech Connect (OSTI)

Twelve nuclear reactor fuel plates were analyzed for fuel loading and fuel loading homogeneity by measuring the attenuation of a collimated X-ray beam as it passed through the plates. The plates were identical to those used by the High Flux Isotope Reactor (HFIR) but were loaded with uranium silicide rather than with HFIR`s uranium oxide fuel. Systematic deviations from nominal fuel loading were observed as higher loading near the center of the plates and underloading near the radial edges. These deviations were within those allowed by HFIR specifications. The report begins with a brief background on the thermal-hydraulic uncertainty analysis for the Advanced Neutron Source (ANS) Reactor that motivated a statistical description of fuel loading and homogeneity. The body of the report addresses the homogeneity measurement techniques employed, the numerical correction required to account for a difference in fuel types, and the statistical analysis of the resulting data. This statistical analysis pertains to local variation in fuel loading, as well as to ``hot segment`` analysis of narrow axial regions along the plate and ``hot streak`` analysis, the cumulative effect of hot segment loading variation. The data for all twelve plates were compiled and divided into 20 regions for analysis, with each region represented by a mean and a standard deviation to report percent deviation from nominal fuel loading. The central regions of the plates showed mean values of about +3% deviation, while the edge regions showed mean values of about {minus}7% deviation. The data within these regions roughly approximated random samplings from normal distributions, although the chi-square ({chi}{sup 2}) test for goodness of fit to normal distributions was not satisfied.

Blumenfeld, P.E.

1995-08-01T23:59:59.000Z

498

Homogeneous carbon doping of magnesium diboride by high-temperature, high-pressure synthesis  

SciTech Connect (OSTI)

We have used high-pressure, high-temperature synthesis at 1500–1700?°C and 10?MPa to create homogeneously C-substituted MgB{sub 2} from a B{sub 4}C + Mg mixture. X-ray diffraction analysis showed large peak-shifts consistent with a decrease in the a lattice parameter for the B{sub 4}C-derived MgB{sub 2} as compared to an undoped sample (0.033–0.037?Å, depending on the sample). Microstructural investigation showed a three-phase mixture in the B{sub 4}C-derived ingots: MgB{sub 2?x}C{sub x} (with 0.178?homogeneity of C-doping in the MgB{sub 2}. The width of the T{sub c} distribution for the C-doped MgB{sub 2} was only 3–6?K with a full-width half maximum (FWHM) of 1.4?K, compared to a width of 2.5?K and a FWHM of 0.65 for an undoped sample. The consistency of these three measurements on a large-grained homogeneous material is unambiguously supportive of C-substitution.

Susner, M. A., E-mail: susner.1@osu.edu; Bohnenstiehl, S. D.; Dregia, S. A.; Sumption, M. D.; Yang, Y.; Collings, E. W. [Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210 (United States); Donovan, J. J. [Center for Advanced Materials Characterization in Oregon (CAMCOR), University of Oregon, Eugene, Oregon 97403 (United States)

2014-04-21T23:59:59.000Z

499

PROPAGATION OF SEISMIC WAVES THROUGH A SPATIO-TEMPORALLY FLUCTUATING MEDIUM: HOMOGENIZATION  

SciTech Connect (OSTI)

Measurements of seismic wave travel times at the photosphere of the Sun have enabled inferences of its interior structure and dynamics. In interpreting these measurements, the simplifying assumption that waves propagate through a temporally stationary medium is almost universally invoked. However, the Sun is in a constant state of evolution, on a broad range of spatio-temporal scales. At the zero-wavelength limit, i.e., when the wavelength is much shorter than the scale over which the medium varies, the WKBJ (ray) approximation may be applied. Here, we address the other asymptotic end of the spectrum, the infinite-wavelength limit, using the technique of homogenization. We apply homogenization to scenarios where waves are propagating through rapidly varying media (spatially and temporally), and derive effective models for the media. One consequence is that a scalar sound speed becomes a tensorial wave speed in the effective model and anisotropies can be induced depending on the nature of the perturbation. The second term in this asymptotic two-scale expansion, the so-called corrector, contains contributions due to higher-order scattering, leading to the decoherence of the wave field. This decoherence may be causally linked to the observed wave attenuation in the Sun. Although the examples we consider here consist of periodic arrays of perturbations to the background, homogenization may be extended to ergodic and stationary random media. This method may have broad implications for the manner in which we interpret seismic measurements in the Sun and for modeling the effects of granulation on the scattering of waves and distortion of normal-mode eigenfunctions.

Hanasoge, Shravan M. [Department of Geosciences, Princeton University, Princeton, NJ 08544 (United States); Gizon, Laurent [Max-Planck-Institut fuer Sonnensystemforschung, D-37191 Katlenburg-Lindau (Germany); Bal, Guillaume [Department of Applied and Physical Mathematics, Columbia University, New York, NY 10027 (United States)

2013-08-20T23:59:59.000Z

500

Lattice vibration in homogeneously-mixed-valent systems of rare-earth materials  

Science Journals Connector (OSTI)

We investigate the essential feature of interplay between lattice vibration and valence fluctuation in the homogeneously-mixed-valent systems of rare-earth materials rigorously within simple models, paying special attention to studying the collective nature of excitations in lattice vibration as well as in valence fluctuation. We compare our results with experiments and find that the general features of the experiments of Sm0.75Y0.25S are well understood within the present model if we assume the characteristic energy of the valence fluctuation to be comparable to the phonon energy.

S. Ichinose and Y. Kuroda

1982-02-15T23:59:59.000Z