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  1. Manco Energy Ltd | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View NewTexas:Montezuma,Information MHKMHK5Transport ProjectsIMichigan: EnergyManco Energy Ltd

  2. Natural Contamination from the Mancos Shale | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterested Parties -Department ofDepartmentNatural Contamination from the Mancos Shale

  3. Facies architecture of the Upper Sego member of the Mancos Shale Formation, Book Cliffs, Utah 

    E-Print Network [OSTI]

    Robinson, Eric D.

    2006-04-12

    The Late Cretaceous upper Sego Member of the Mancos Shale exposed in the Book Cliffs of east-central Utah is a 30 m thick sandstone wedge that overlies the Anchor Mine Tongue of the Mancos Shale and underlies coastal plain deposits of the Neslen...

  4. KV04: Baxter Mountain This route visits

    E-Print Network [OSTI]

    Reiter, Clifford A.

    11 KV04: Baxter Mountain General This route visits Baxter Mountain which is a short hike that has between Hurricane and Green Mountains. The hike is relatively short although there is a good elevation Description The trail begins on Rt9N directly across from Hurricane Mountain Road. From Keene Valley, go north

  5. SILVER--1999 69.1 By Henry E. Hilliard

    E-Print Network [OSTI]

    SILVER--1999 69.1 SILVER By Henry E. Hilliard Domestic survey data and tables were prepared, international data coordinator. In 1999, the average annual price of silver was $5.25 per troy ounce, down from was filled mostly by new mine production and scrap and part was filled by destocking. In 1999, domestic mine

  6. Direct Experimental Simulation of the Yang-Baxter Equation

    E-Print Network [OSTI]

    Chao Zheng; Jun-lin Li; Si-yu Song; Gui Lu Long

    2013-05-27

    Introduced in the field of many-body statistical mechanics, Yang-Baxter equation has become an important tool in a variety fields of physics. In this work, we report the first direct experimental simulation of the Yang-Baxter equation using linear quantum optics. The equality between the two sides of the Yang-Baxter equation in two dimension has been demonstrated directly, and the spectral parameter transformation in the Yang-Baxter equation is explicitly confirmed.

  7. Decoupled energy-law preserving numerical schemes for the Cahn-Hilliard-Darcy system

    E-Print Network [OSTI]

    Decoupled energy-law preserving numerical schemes for the Cahn-Hilliard-Darcy system Daozhi Han novel decoupled energy-law preserving numerical schemes for solving the Cahn- Hilliard-Darcy (CHD a discrete energy law with a time- step constraint, while the second scheme satisfies an energy law without

  8. New elliptic solutions of the Yang-Baxter equation

    E-Print Network [OSTI]

    D. Chicherin; S. E. Derkachov; V. P. Spiridonov

    2015-05-13

    We consider finite-dimensional reductions of the most general known solution of the Yang-Baxter equation with a rank 1 symmetry algebra, which is described by an integral operator with an elliptic hypergeometric kernel. The reduced R-operators reproduce at their bottom the standard Baxter's R-matrix for the 8-vertex model and Sklyanin's L-operator. The general formula has a remarkably compact form and yields new elliptic solutions of the Yang-Baxter equation based on the finite-dimensional representations of the elliptic modular double. The same result is reproduced using the fusion formalism.

  9. AN UNCONDITIONALLY STABLE UNCOUPLED SCHEME FOR A TRIPHASIC CAHN-HILLIARD/NAVIER-STOKES MODEL

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    (lava-like molten mixture of portions of nuclear reactor core) and concrete (last confinement barrier accurate. For instance, in nuclear safety [23], the understanding of interaction between molten corium-Hilliard model. In diffuse interfaces theory, the interfaces are assumed to have a non-zero thickness (which

  10. Astragalus humilimus Mancos milkvetch

    E-Print Network [OSTI]

    ,000-500,000 · Primary threats: oil and gas development, oil shale and nahcolite mining, ORV use, overgrazing, trampling

  11. The Baxter Q Operator of Critical Dense Polymers

    E-Print Network [OSTI]

    Alessandro Nigro

    2009-09-07

    We consider critical dense polymers ${\\cal L}_{1,2}$, corresponding to a logarithmic conformal field theory with central charge $c=-2$. An elegant decomposition of the Baxter $Q$ operator is obtained in terms of a finite number of lattice integrals of motion. All local, non local and dual non local involutive charges are introduced directly on the lattice and their continuum limit is found to agree with the expressions predicted by conformal field theory. A highly non trivial operator $\\Psi(\

  12. A New Method for Simulating Strongly Anisotropic Cahn-Hilliard Equations S. Torabi , S. Wise , J. Lowengrub

    E-Print Network [OSTI]

    Lowengrub, John

    , biological sensors and data storage devices. #12;(a) (b) Fig. 1 (a) Quantum dot pyramids (light) and domes, Nanostructures, Cahn-Hilliard, Epitaxy, Crystal growth, Surface Energy, Anisotropy Abstract We present a new devices based on ordered assemblies of nanoscale quantum dots. While such structures are well beyond

  13. Derivation of effective macroscopic Stokes-Cahn-Hilliard equations for periodic immiscible flows in porous media

    E-Print Network [OSTI]

    Markus Schmuck; Marc Pradas; Gregorios A. Pavliotis; Serafim Kalliadasis

    2013-10-19

    Using thermodynamic and variational principles we examine a basic phase field model for a mixture of two incompressible fluids in strongly perforated domains. With the help of the multiple scale method with drift and our recently introduced splitting strategy for Ginzburg-Landau/Cahn-Hilliard-type equations [Schmuck et al., Proc. R. Soc. A 468:3705-3724, 2012.], we rigorously derive an effective macroscopic phase field formulation under the assumption of periodic flow and a sufficiently large P\\'eclet number. As for classical convection-diffusion problems, we obtain systematically diffusion-dispersion relations (including Taylor-Aris-dispersion). Our results also provide a convenient analytical and computational framework to macroscopically track interfaces in porous media. In view of the well-known versatility of phase field models, our study proposes a promising model for many engineering and scientific applications such as multiphase flows in porous media, microfluidics, and fuel cells.

  14. Energy Exchange Analysis in Droplet Dynamics via the Navier-Stokes-Cahn-Hilliard Model

    E-Print Network [OSTI]

    Espath, LFR; Vignal, P; Varga, BON; Cortes, AMA; Dalcin, L; Calo, VM

    2015-01-01

    We develop the energy budget equation of the coupled Navier-Stokes-Cahn-Hilliard (NSCH) system. We use the NSCH equations to model the dynamics of liquid droplets in a liquid continuum. Buoyancy effects are accounted for through the Boussinesq assumption. We physically interpret each quantity involved in the energy exchange to further insight into the model. Highly resolved simulations involving density-driven flows and merging of droplets allow us to analyze these energy budgets. In particular, we focus on the energy exchanges when droplets merge, and describe flow features relevant to this phenomenon. By comparing our numerical simulations to analytical predictions and experimental results available in the literature, we conclude that modeling droplet dynamics within the framework of NSCH equations is a sensible approach worth further research.

  15. 2 15.10.2013 Van D. BaxterVolker Weinmann Hybrid heat pump system as chance for the

    E-Print Network [OSTI]

    Oak Ridge National Laboratory

    pumps Condensing gas and oil boilers DHW tanks Solar panels Under floor heating Installation equipment#12;2 15.10.2013 Van D. BaxterVolker Weinmann Hybrid heat pump system as chance for the renovation market Dipl.-Ing. Volker Weinmann ROTEX Heating Systems GmbH #12;3 15.10.2013 Van D. Baxter

  16. Wednesday, February 18, 12:00 PM Baxter Lecture Hall Auditorium

    E-Print Network [OSTI]

    Wednesday, February 18, 12:00 PM Baxter Lecture Hall Auditorium Chen-Huang Sustainable Energy in Stanford's Precourt Institute on Energy and Woods Institute on Environment. Richter discovered a new kind by the U.S. Atomic Energy Commission for which he was awarded the Nobel Prize in Physics (1976) and the E

  17. $\\mathbb{Z}_3$ Parafermionic Chain Emerged From Yang-Baxter Equation

    E-Print Network [OSTI]

    Li-Wei Yu; Mo-Lin Ge

    2015-11-07

    We construct the 1D $\\mathbb{Z}_3$ parafermionic model based on the solution of Yang-Baxter equation and express the model by three types of fermions. It is shown that the $\\mathbb{Z}_3$ parafermionic chain possesses both triple degenerate ground states and non-trivial topological winding number. Hence, the $\\mathbb{Z}_3$ parafermionic model is a direct generalization of 1D $\\mathbb{Z}_2$ Kitaev model. Hence both the $\\mathbb{Z}_2$ and $\\mathbb{Z}_3$ model can be obtained from Yang-Baxter equation. On the other hand, to show the algebra of parafermionic tripling intuitively, we define a new 3-body Hamiltonian $\\hat{H}_{123}$ based on Yang-Baxter equation. Different from the Majorana doubling, the $\\hat{H}_{123}$ holds triple degeneracy at each of energy levels. The triple degeneracy is protected by two symmetry operators of the system, $\\omega$-parity $P$($\\omega=e^{{\\textrm{i}\\frac{2\\pi}{3}}}$) and emergent parafermionic operator $\\Gamma$, which are the generalization of parity $P_{M}$ and emergent Majorana operator in Lee-Wilczek model, respectively. Both the $\\mathbb{Z}_3$ parafermionic model and $\\hat{H}_{123}$ can be viewed as SU(3) models in color space. In comparison with the Majorana models for SU(2), it turns out that the SU(3) models are truly the generalization of Majorana models resultant from Yang-Baxter equation.

  18. Cahn-Hilliard Reaction Model for Isotropic Li-ion Battery Particles Yi Zeng1, Martin Z. Bazant1,2

    E-Print Network [OSTI]

    Bazant, Martin Z.

    Cahn-Hilliard Reaction Model for Isotropic Li-ion Battery Particles Yi Zeng1, Martin Z. Bazant1,2 1 particle. This general approach extends previous Li-ion battery models, which either neglect phase separation or postulate a spherical shrinking-core phase boundary under all conditions, by predicting phase

  19. Fusion procedure for the Yang-Baxter equation and Schur-Weyl duality

    E-Print Network [OSTI]

    L. Poulain d'Andecy

    2013-07-25

    We first review the fusion procedure for an arbitrary solution of the Yang-Baxter equation and the study of distinguished invariant subspaces for the fused solutions. Then we apply these general results to four particular solutions: the Yang solution, its standard deformation and their generalizations for super vector spaces. For the Yang solution, respectively, its "super" generalization, we explain how, using the fusion formula for the symmetric group together with the (super) Schur-Weyl duality, the fusion procedure allows to construct a family of fused solutions of the Yang-Baxter equation acting on irreducible representations of the general linear Lie algebra, respectively, of the general linear Lie superalgebra. For the deformations of the two previous solutions, we use the fusion formula for the Hecke algebra together with the (super) quantum Schur--Weyl duality to obtain fused solutions acting on irreducible representations of the quantum groups associated to the general linear Lie (super)algebras.

  20. IMPaSTo: A Realistic, Interactive Model for Paint William Baxter, Jeremy Wendt, and Ming C. Lin

    E-Print Network [OSTI]

    North Carolina at Chapel Hill, University of

    IMPaSTo: A Realistic, Interactive Model for Paint William Baxter, Jeremy Wendt, and Ming C. Lin,jwendt,lin}@cs.unc.edu http://gamma.cs.unc.edu/IMPaSTo/ Abstract We present a paint model for use in interactive painting a numerical simulation to recreate the physical flow of paint and an optical model to mimic the paint

  1. Entanglement Entropy from Corner Transfer Matrix in Forrester Baxter non-unitary RSOS models

    E-Print Network [OSTI]

    Bianchini, Davide

    2015-01-01

    Using a Corner Transfer Matrix approach, we compute the bipartite entanglement R\\'enyi entropy in the off-critical perturbations of non-unitary conformal minimal models realised by lattice spin chains Hamiltonians related to the Forrester Baxter RSOS models in regime III. This allows to show on a set of explicit examples that the R\\'enyi entropies for non-unitary theories rescale near criticality as the logarithm of the correlation length with a coefficient proportional to the effective central charge. This complements a similar result, recently established for the size rescaling at the critical point, showing the expected agreement of the two behaviours. We also compute the first subleading unusual correction to the scaling behaviour, showing that it is expressible in terms of expansions of various fractional powers of the correlation length, related to the differences $\\Delta-\\Delta_{\\min}$ between the conformal dimensions of fields in the theory and the minimal conformal dimension. Finally, a few observati...

  2. A non-symmetric Yang-Baxter algebra for the quantum nonlinear Schrödinger model (PhD Thesis)

    E-Print Network [OSTI]

    Bart Vlaar

    2013-03-26

    We study certain non-symmetric wavefunctions associated to the quantum nonlinear Schr\\"odinger (QNLS) model, introduced by Komori and Hikami using representations of the degenerate affine Hecke algebra. In particular, they can be generated using a vertex operator formalism analogous to the recursion that defines the symmetric QNLS wavefunction in the quantum inverse scattering method. Furthermore, some of the commutation relations encoded in the Yang-Baxter equation are generalized to the non-symmetric case.

  3. Canonical factorization and diagonalization of Baxterized braid matrices: Explicit constructions and applications

    E-Print Network [OSTI]

    A. Chakrabarti

    2003-05-07

    Braid matrices $\\hat{R}(\\theta)$, corresponding to vector representations, are spectrally decomposed obtaining a ratio $f_{i}(\\theta)/f_{i}(-\\theta)$ for the coefficient of each projector $P_{i}$ appearing in the decomposition. This directly yields a factorization $(F(-\\theta))^{-1}F(\\theta)$ for the braid matrix, implying also the relation $\\hat{R}(-\\theta)\\hat{R}(\\theta)=I$.This is achieved for $GL_{q}(n),SO_{q}(2n+1),SO_{q}(2n),Sp_{q}(2n)$ for all $n$ and also for various other interesting cases including the 8-vertex matrix.We explain how the limits $\\theta \\to \\pm \\infty$ can be interpreted to provide factorizations of the standard (non-Baxterized) braid matrices. A systematic approach to diagonalization of projectors and hence of braid matrices is presented with explicit constructions for $GL_{q}(2),GL_{q}(3),SO_{q}(3),SO_{q}(4),Sp_{q}(4)$ and various other cases such as the 8-vertex one. For a specific nested sequence of projectors diagonalization is obtained for all dimensions. In each factor $F(\\theta)$ our diagonalization again factors out all dependence on the spectral parameter $\\theta$ as a diagonal matrix. The canonical property implemented in the diagonalizers is mutual orthogonality of the rows. Applications of our formalism to the construction of $L-$operators and transfer matrices are indicated. In an Appendix our type of factorization is compared to another one proposed by other authors.

  4. A review of "The Eliot Tracts: With Letters from John Eliot to Thomas Thorowgood and Richard Baxter." by John Eliot 

    E-Print Network [OSTI]

    William J. Scheick

    2005-01-01

    -CENTURY NEWS John Eliot. The Eliot Tracts: With Letters from John Eliot to Thomas Thorowgood and Richard Baxter. Edited by Michael Clark. Westport, Conn.: Praeger Publishers, 2003. viii + 453 pp. $99.95. Review by WILLIAM J. SCHEICK, UNIVERSITY OF TEXAS... in a reverse migration from New England to their now spiritually liberated homeland. By 1651, even influential John Davenport was ready to leave New England for England, though by mid-decade he clearly saw the error of his over-estimation of Cromwell?s...

  5. Factorized three-body S-matrix restrained by the Yang–Baxter equation and quantum entanglements

    SciTech Connect (OSTI)

    Yu, Li-Wei; Zhao, Qing; Ge, Mo-Lin

    2014-09-15

    This paper investigates the physical effects of the Yang–Baxter equation (YBE) to quantum entanglements through the 3-body S-matrix in entangling parameter space. The explicit form of 3-body S-matrix ?{sub 123}(?,?) based on the 2-body S-matrices is given due to the factorization condition of YBE. The corresponding chain Hamiltonian has been obtained and diagonalized, also the Berry phase for 3-body system is given. It turns out that by choosing different spectral parameters the ?(?,?)-matrix gives GHZ and W states respectively. The extended 1-D Kitaev toy model has been derived. Examples of the role of the model in entanglement transfer are discussed. - Highlights: • We give the relation between 3-body S-matrix and 3-qubit entanglement. • The relation between 3-qubit and 2-qubit entanglements is investigated via YBE. • 1D Kitaev toy model is derived by the Type-II solution of YBE. • The condition of YBE kills the “Zero boundary mode” in our chain model.

  6. Hilliard Energy | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource History View NewGuam: Energyarea, CaliforniaHessWind Project Jump

  7. Baxter ? Account Management

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

    Efficiency | Sustain Results ISO 50001SEP Superior Energy Performance at Schneider Electric Schneider Electric - Sustainability Services - 2014 2 Schneider Electric - the...

  8. Hilliard, Ohio: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

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

  9. A dynamic Cassie-Baxter model

    E-Print Network [OSTI]

    Liu, TL; Chen, Z; Chen, Z; Kim, CJ

    2015-01-01

    s equation 27 : ? SV = ? SL + ? cos ? Y where ? SV and ? SLas, ? SV + f R = ? SL + ? cos ? R where ? R ? R is the localEqs. 1 and 2 as: f R ? = cos ? R ? cos ? Y ? Y ? SV Receding

  10. P. D. Fairchild V. D. Baxter

    Office of Scientific and Technical Information (OSTI)

    a working fluid in industrial and large-scale refrigeration, ammonia provides high efficiency, low initial cost, and no detrimental impact to the environment. However, its...

  11. A dynamic Cassie-Baxter model

    E-Print Network [OSTI]

    Liu, TL; Chen, Z; Chen, Z; Kim, CJ

    2015-01-01

    Matsushita, “Sliding of Water Droplets on Smooth Hydrophobicrepellent (superhydrophobic for water) property. The Cassie-alignment, the elongated water droplet attached to the top

  12. A dynamic Cassie-Baxter model

    E-Print Network [OSTI]

    Liu, TL; Chen, Z; Chen, Z; Kim, CJ

    2015-01-01

    TCL, which creates a surface energy barrier against the TCLto obtain the same result from thermodynamic energy balanceif the energy stored in a curved meniscus (i.e. , local

  13. Baxter, Minnesota: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar Energy LLC Jump to:Greece:Bajo en Carbono, MexicoBanhamOilBattic Door

  14. P. D. Fairchild V. D. Baxter

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield MunicipalTechnical Report:Speeding access toSmall Reactor for Deep Space ExplorationLBNL-55574 AP

  15. Workplace Charging Challenge Partner: Baxter International Inc. |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematics And Statistics » USAJobs SearchAMERICA'SEnergy Safely Tear DownEnergy|Energy

  16. Coarsening dynamics of the convective Cahn-Hilliard equation and ...

    E-Print Network [OSTI]

    2003-04-08

    Last, a linear stability analysis of CDS identifies a pinching mechanism as the dominant instability, which in turn leads to kink-ternaries. We propose a self-

  17. Robert W. SchoDlng Joh n L. Baxter

    E-Print Network [OSTI]

    vegetables, and the continued strength in prices of fish, fats, and oil products. Consumer expenditures matters. #12;u.s. FOOD SITUATION Prices for food to be consumed at home in 1971 probably will average around 3% above 1970. In 1970, the increase was 5.1%. The price uptrend in away-from -home eating

  18. Stochastic models of fish larval growth Paul D. Baxter,

    E-Print Network [OSTI]

    Baxter, Paul D.

    metabolic costs, " is the maximal rate (capped rate) at which the individual can grow. " It makes¨ive stochastic generalisation (2) " Consider a random trajectory, as shown below. " Compare the gradient defined by ¢ DE §! FG E § H I £ §! with the gradient of §! over a time interval §! . " Solution is dependent

  19. Posted 6.1.12 Job details -Baxter

    E-Print Network [OSTI]

    Heller, Barbara

    processes & controls, ERP systems such as JD Edwards and Lean Six Sigma. 4) PMP, Six Sigma belt or APICS

  20. ALGORITHMS FOR PERMUTATION STATISTICS BY ANDREW MICHAEL BAXTER

    E-Print Network [OSTI]

    Zeilberger, Doron

    and original works by these three readers. iii #12;Dedication This work is dedicated to my wife, Kristen. I Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii Dedication

  1. Baxter County, Arkansas: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EAandAmminexInformationArkansas: Energy Resources Jump to: navigation,

  2. NUMERICAL ANALYSIS OF THE CAHN-HILLIARD EQUATION AND APPROXIMATION FOR THE HELE-SHAW PROBLEM,

    E-Print Network [OSTI]

    that the super-index on the solution u is suppressed for notation brevity. We established a priori solution a global (in time) clas- sical solution. To our knowledge, such a numerical convergence result is not yet

  3. Coarsening Kinetics from a Variable-Mobility Cahn-Hilliard Equation

    E-Print Network [OSTI]

    1999-10-21

    scribe coarsening, the contribution of the interfacial energy to the total free energy ..... fusion will dominate the late stage of coarsening, recovering the ordinary ...

  4. Energy Stable Schemes for Cahn-Hilliard phase-field model of two ...

    E-Print Network [OSTI]

    2010-08-14

    Aug 25, 2010 ... The main objective of this paper is to construct efficient and simple ... with a thin smooth transition layer of thickness ? connecting the two fluids ...

  5. Architectural Integration and Evolution in a Model World Alexander Egyed Rich Hilliard

    E-Print Network [OSTI]

    Egyed, Alexander

    it is not surprising that recent standards such as the IEEE Recommended Practice for Architectural Description [8] (P suggests the use of views, following a widespread practice in software/systems modeling. Views deal, and resolve conflicts between them to ensure that the developed software system meets everyone's expectations

  6. Well-posedness of the Hele-Shaw-Cahn-Hilliard system Xiaoming Wang

    E-Print Network [OSTI]

    Wang, Xiaoming

    ]. Displacement of oil by water in oil reservoir (usually porous media) is one of the well-known examples of two under the assumption that the initial data is a small perturbation of a flat interface or a sphere. 1

  7. An Efficient, Energy Stable Scheme for the Cahn-Hilliard-Brinkman ...

    E-Print Network [OSTI]

    2012-06-09

    We present an unconditionally energy stable and uniquely solvable finite difference ... The scheme is based on a convex splitting of the discrete CH energy and.

  8. Long-time behavior of the Hele-Shaw-Cahn-Hilliard system

    E-Print Network [OSTI]

    Wang, Xiaoming

    emerg- ing applications in material science (Hele-Shaw cell), fuel cell technology (water management in PEM fuel cells), as well as biomedical science (tumor growth modeled as flow in porous media and engineering applications. Well-known examples include 1 #12;groundwater study (water table, interface between

  9. Preliminary High-Resolution Time-Lines Through the Cenomanian-Turonian (Late Cretaceous) Oceanic Anoxic Event (OAE 2)

    E-Print Network [OSTI]

    Keller, Allison Lynn

    2015-01-01

    of the Mancos Shale, Lincoln County, New Mexico. New MexicoShale (Upper Cretaceous), Mesa Verde, Colorado. New Mexico

  10. Existence and uniqueness of global weak solutions to a Cahn-Hilliard-Stokes-Darcy system for two phase incompressible

    E-Print Network [OSTI]

    exchange membrane fuel cell technology and cardiovascular modelling require the coupling of flows Applications such as contaminant transport in karst aquifer, oil recovery in karst oil reservoir, proton

  11. Existence and uniqueness of global weak solutions to a Cahn-Hilliard-Stokes-Darcy system for two phase incompressible

    E-Print Network [OSTI]

    Wang, Xiaoming

    , proton exchange membrane fuel cell technology and cardiovascular modelling require the coupling of flows. Introduction Applications such as contaminant transport in karst aquifer, oil recovery in karst oil reservoir

  12. BEM 105 "OPTIONS" Instructor: Jaksa Cvitanic; 319 Baxter, 395-1784, cvitanic@hss.caltech.edu

    E-Print Network [OSTI]

    Low, Steven H.

    - but please report them; no col- laboration allowed on the final exam. Homeworks and final are open-book, open probabilities (a.k.a. Equiva- lent Martingale Measure or risk-neutral probabilities): binomial model (3.1, 3.3, 7.4, 7.5) 13. & 14. Stochastic volatility (7.2.4, 7.6.3, 7.6.4, 7.8) 15. Portfolio risk; Hedging (5

  13. Studies of Paleozoic Seed Ferns: Additional Studies of Microspermopteris aphyllum Baxter

    E-Print Network [OSTI]

    Pigg, K. B.; Stockey, Ruth A.; Taylor, Thomas N.

    1986-03-01

    that bear two-, three-, or four-lobed ultimate laminar pinnules. Pinnules reconstructed from serial sections are morphologically similar to Sphenopteris-like compressions; however, the overall frond is reduced in size and complexity. While some axillary...

  14. * To whom correspondence should be addressed: Baxter Hemoglobin Therapeutics Inc., 2545 Central Ave. Boulder, CO 80301

    E-Print Network [OSTI]

    Szpankowski, Wojciech

    overlapping of the clusters which may explain the limited success of previous protein folding prediction based of protein folding classes based on primary sequence information remains a difficult task (1- 9 dimensions. Several attempts have been made to use AAC information to predict protein folding classes (7

  15. Baxter Creek Gateway Park: assessment of an urban stream restoration project

    E-Print Network [OSTI]

    Goodman, Judd; Lunde, Kevin B; Zaro, Theresa

    2006-01-01

    restoration project Flow (cfs) Q 10 Q 100 * Leventhal, 2006Facie (dynes/cm)* stress (cfs) (mm) Embedded (ft ) (yrs)** #intervals is 90.5 and 130.5 cfs, respectively (Leventhal,

  16. Nanoscale design to enable the revolution in renewable energy Jason Baxter,a

    E-Print Network [OSTI]

    on the environment and have limited economic and societal disruption during implementation. In this opinion paper, we-fold perspective: analyzing the fundamental physicochemical principles and engineering aspects of these energy themes in basic energy science that cut across the entire spectrum a Drexel University, Department

  17. Tracking Quantity Fluctuations using STT Robert C. Kahlert, Ben Rode, David Baxter,

    E-Print Network [OSTI]

    Forbus, Kenneth D.

    : A disaster affects critical refinement capabilities for crude oil, decreasing the supply of gasoline, which of oil price fluctuations are an example of such events, and are tracked in the STT (Situation Tracking- mation to be extracted. Our primary example domain will be quantity changes related to oil price

  18. Baxter County, Arkansas ASHRAE 169-2006 Climate Zone | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EAandAmminexInformation

  19. A numerical method for the quasi-incompressible Cahn-Hilliard-Navier-Stokes equations for variable density flows with a discrete energy law

    E-Print Network [OSTI]

    Zhenlin Guo; Ping Lin; John S. Lowengrub

    2014-02-19

    In this paper, we investigate numerically a diffuse interface model for the Navier-Stokes equation with fluid-fluid interface when the fluids have different densities \\cite{Lowengrub1998}. Under minor reformulation of the system, we show that there is a continuous energy law underlying the system, assuming that all variables have reasonable regularities. It is shown in the literature that an energy law preserving method will perform better for multiphase problems. Thus for the reformulated system, we design a $C^0$ finite element method and a special temporal scheme where the energy law is preserved at the discrete level. Such a discrete energy law (almost the same as the continuous energy law) for this variable density two-phase flow model has never been established before with $C^0$ finite element. A Newton's method is introduced to linearise the highly non-linear system of our discretization scheme. Some numerical experiments are carried out using the adaptive mesh to investigate the scenario of coalescing and rising drops with differing density ratio. The snapshots for the evolution of the interface together with the adaptive mesh at different times are presented to show that the evolution, including the break-up/pinch-off of the drop, can be handled smoothly by our numerical scheme. The discrete energy functional for the system is examined to show that the energy law at the discrete level is preserved by our scheme.

  20. SERVICE STATION INFORMATION There are 2 campus service stations for use by University of Michigan vehicles. The Baxter Road Service

    E-Print Network [OSTI]

    Kirschner, Denise

    to alternative fuel by refining our biodiesel fuel to Ultra Low Sulfur B20 biodiesel meeting 2009 diesel fuel

  1. MEXUS-Gulf Shrimp Research, 1978-84 EDWARD F. KLIMA, REFUGIO GMO. CASTRO MELENDEZ, NEAL BAXTER,

    E-Print Network [OSTI]

    , FRANK J. PATELLA, TERRY J. CODY, and LOREnA F. SULLIVAN Introduction Mexico and the United States share shrimp and other marine resources in the Gulf of Mexico. As a result, in 1fJ77 a cooperative research shrimp production in the Gulf of Mexico in 1fJ77 was about 148,000 metric tons (t), heads on, whereas

  2. Embryonic and Larval Development of Sacramento Splittail Pogonichthys macrolepidotus

    E-Print Network [OSTI]

    Deng, Xin; Teh, Swee J.; Doroshov, Serge I.; Hung, Silas S. O.

    2012-01-01

    p. Moyle PB, Baxter RD, Sommer T, Foin TC, Mater SA. 2004.66:797–816. Feyrer F, Sommer TR, Baxter R. 2005. Spatial-KS): Allen Press. p 11–22. Sommer T, Baxter R, Herbold B.

  3. Rock-Fluid Chemistry Impacts on Shale Hydraulic Fracture and Microfracture Growth 

    E-Print Network [OSTI]

    Aderibigbe, Aderonke

    2012-07-16

    The role of surface chemical effects in hydraulic fracturing of shale is studied using the results of unconfined compression tests and Brazilian tests on Mancos shale- cored at depths of 20-60 ft. The rock mineralogy, total ...

  4. Motivation Set-theoretic solutions Strategy 1 to determine set-theoretic solutions and Problems Groups, Group rings and the Yang-Baxter

    E-Print Network [OSTI]

    Digne, François

    Motivation Set-theoretic solutions Strategy 1 to determine set-theoretic solutions and Problems (Baie de Somme) May 30th ­ june 2nd 2012 Eric Jespers #12;Motivation Set-theoretic solutions Strategy 1 to determine set-theoretic solutions and Problems Lecture Outline Motivation #12;Motivation Set

  5. Behavioural Response of Bats to Perceived Predation Risk While Daniel J. M. Baxter, Jennifer M. Psyllakis, Michael P. Gillingham & Erin L. O'Brien

    E-Print Network [OSTI]

    Gillingham, Michael

    , University of Northern British Columbia, Prince George, BC, Canada Introduction Many prey organisms Columbia, 3333 University Way, Prince George, BC, V2N 4Z9 Canada. E-mail: psyllakj@unbc.ca Received

  6. multimaterial topology optimization by volume constrained allen ...

    E-Print Network [OSTI]

    2014-04-04

    In [22], the optimization of the position of fuel assemblies in a nuclear reactor core ...... interface criterion for phase transitions in mixtures of cahn-hilliard fluids.

  7. Office of Fossil Energy Kicks Off 19th Year of Mickey Leland...

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

    Pictured from left to right: Wendy Hertulien, Noelle Hilliard, Vianey Escobar, and Jasmin Selby. How a Chemical Engineering Major & Track Star Came to a DOE Summer Internship...

  8. Optimization Online - Multimaterial topology optimization by volume ...

    E-Print Network [OSTI]

    R Tavakoli

    2013-11-14

    Nov 14, 2013 ... ... by the multiphase volume constrained Cahn-Hilliard energy functional. ... The success and efficiency of the presented method are shown ...

  9. PDF file

    E-Print Network [OSTI]

    2005-04-25

    Energetic variational formulation, phase field methods, Cahn-Hilliard equation, two-phase ...... captive drops: PEO-water in silicon oil. J. Colloid Interface Sci., ...

  10. SHEAR CELL RUPTURE OF NEMATIC LIQUID CRYSTAL ...

    E-Print Network [OSTI]

    2011-01-18

    For two-phase Newtonian (purely viscous) fluids, the free energy above yields the Cahn-Hilliard ...... Efficient phase-field simulation of quantum dot formation in a ...

  11. Why Can’t We All Just Be Individuals?: Countering the Discourse of Individualism in Anti-racist Education

    E-Print Network [OSTI]

    DiAngelo, Robin J

    2010-01-01

    Hilliard, A. (1992). Racism: Its origins and how it works.2001). Understanding prejudice, racism, and social conflict.Bonilla-Silva, E. (2006). Racism without racist: Color-blind

  12. Sustainable Development & Land Use Committee Meeting Meeting 2009-2010 #1

    E-Print Network [OSTI]

    2009 Present: Hugh Scott (Chair); Esther Barnett; Keith Baxter; Michel Caron; Mary Ellen Donnan; Kyle Barnett Seconded by: Keith Baxter 1.3 Business Arising: None. 1.4 SDAG Report ­ Erika Ide Erika spoke

  13. The use of otolith strontium isotopes (87Sr/86Sr) to identify nursery habitat for a threatened estuarine fish

    E-Print Network [OSTI]

    Hobbs, James A.; Lewis, Levi S.; Ikemiyagi, Naoaki; Sommer, Ted; Baxter, Randall D.

    2010-01-01

    Naoaki Ikemiyagi & Ted Sommer & Randall D. Baxter Received:mail: jahobbs@ucdavis.edu T. Sommer California Department ofAct 1 (Baxter et al. 2007; Sommer et al. 2007; California

  14. Biology and Long-Term Trends of Alien Hydromedusae and Striped Bass in a Brackish Tidal Marsh in the San Francisco Estuary

    E-Print Network [OSTI]

    Schroeter, Robert E.

    2008-01-01

    J. Mar. Sci. 57:641-648. Sommer, T. , C. Armor, R. Baxter,Biol. Bull. 156: 356- Sommer, T. , C. Armor, R. Baxter, R.Mills, C.E. and F. Sommer. 1995. Invertebrate introductions

  15. Old School vs. New School: Status of Threadfin Shad (Dorosoma petenense) Five Decades After Its Introduction to the Sacramento–San Joaquin Delta

    E-Print Network [OSTI]

    Feyrer, Frederick; Sommer, Ted; Slater, Steven B.

    2009-01-01

    K, Baxter R, Hymanson Z, Sommer T, Gingras?M, Cadrett P.68:51-59. Feyrer F, Nobriga M, Sommer T. 2007. Multi-decadalEcology & Evolution 17:170-176 Sommer T, Armor C, Baxter R,

  16. CX-004194: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Cretaceous Mancos Shale Uinta Basin, Utah: Resource Potential and Best Practices For an Emerging ShaleCX(s) Applied: A9, B3.1Date: 09/27/2010Location(s): Price, UtahOffice(s): Fossil Energy, National Energy Technology Laboratory

  17. Potential Effects of a Forest Management Plan on Bachman's Sparrows (Aimophila aestivalis): Linking

    E-Print Network [OSTI]

    Departamento de Energia de los Estados Unido& en Carolina del Sur La estrategia utilizada combtn6 un modelo de mango para varias especie& debtdo a requerimientos legales la mayoria de las estrategias de manejo de ninguna estrategia especifica de manc~o, pero que comparte algunos de los requerimientos de

  18. IMPROVING THE PERSISTENCE OF FIRST-YEAR UNDERGRADUATE WOMEN IN COMPUTER SCIENCE

    E-Print Network [OSTI]

    Plotkin, Joshua B.

    IMPROVING THE PERSISTENCE OF FIRST-YEAR UNDERGRADUATE WOMEN IN COMPUTER SCIENCE Rita Manco Powell@cis.upenn.edu Abstract This paper describes a study of undergraduate women's retention in the first-year of the computer Gender Issues, Persistence, Attrition, Curriculum 1. Introduction Enrollment in computer science programs

  19. Domain growth in alloys 

    E-Print Network [OSTI]

    Hawick, Kenneth Arthur

    1991-01-01

    This thesis describes Monte-Carlo computer simulations of binary alloys, with comparisons between small angle neutron scattering (SANS) data, and numerically integrated solutions to the Cahn-Hilliard-Cook (CHC) equation. ...

  20. Quarterly Business Review FY 2009 3rd Quarter Financial Results...

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

    - MarketingSales ReservationsE-Tag Automation 28-34 Sue Holden Baker 2:25 15 Fish & Wildlife - Research, Monitoring & Evaluation 35-41 Bill Maslen, Jamae Hilliard Creecy...

  1. Conduction-only transport phenomena in compressible bivelocity fluids: Diffuse interfaces and Korteweg stresses

    E-Print Network [OSTI]

    Brenner, Howard

    “Diffuse interface” theories for single-component fluids—dating back to van der Waals, Korteweg, Cahn-Hilliard, and many others—are currently based upon an ad hoc combination of thermodynamic principles (built largely upon ...

  2. Intercalation dynamics in lithium-ion batteries

    E-Print Network [OSTI]

    Burch, Damian

    2009-01-01

    A new continuum model has been proposed by Singh, Ceder, and Bazant for the ion intercalation dynamics in a single crystal of rechargeable-battery electrode materials. It is based on the Cahn-Hilliard equation coupled to ...

  3. 7803/7804 -Project Review Meeting Schedule Supervisor Client Students

    E-Print Network [OSTI]

    Peters, Dennis

    , Sean Jessome, Matthew Baxter Thursday, July 30 4:00pm-4:30pm Popsicle Bridge Test Frame Dennis Peters

  4. B O N N E V I L L E P O W E R A D M I N I S T R A T I O N

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

    alternative includes the Casey Road substation site. As compared to the Baxter Road substation site, the Casey Road substation site avoids significant steep, rocky terrain,...

  5. A deformation of quantum affine algebra in squashedWess-Zumino...

    Office of Scientific and Technical Information (OSTI)

    by computing the rs-matrices that satisfy the extended classical Yang-Baxter equation. Finally, two degenerate limits are discussed. Authors: Kawaguchi, Io ; Yoshida,...

  6. Methods of Photoelectrode Characterization with High Spatial...

    Office of Scientific and Technical Information (OSTI)

    and Temporal Resolution Authors: Esposito, Daniel V ; Baxter, Jason B ; John, Jimmy ; Lewis, Nathan S. ; Moffat, Thomas P ; Ogitsu, Tadashi ; O'Neil, Glen D ; Pham, T. D. ;...

  7. Undergraduate Mathematics Award and Scholarship winners ...

    E-Print Network [OSTI]

    $author.value

    ... Memorial Award in Analysis: Bennett Marsh; Glen E. Baxter Memorial Award: ... Patrick Lewis, Mikaela Meyer, Kristen Mori, Andres Urrego, Tatiana Utreras, ...

  8. WHAT'SON FREE BROUGHT TO YOU BY

    E-Print Network [OSTI]

    New South Wales, University of

    Cracknell Pavilion New College Village Squarehouse Parade Theatre NIDA Law Building International House Chemical Sciences Science Theatre Australian School of Business Baxter College Dalton Building Quadrangle

  9. Mango, Florida: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View NewTexas:Montezuma,Information MHKMHK5Transport ProjectsIMichigan: EnergyManco

  10. Natural Gas Exports by Pipeline out of the U.S. Form | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterested Parties -Department ofDepartmentNatural Contamination from the Mancos

  11. Natural Gas Fuel Basics | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterested Parties -Department ofDepartmentNatural Contamination from the MancosNatural

  12. AN UNCONDITIONALLY STABLE UNCOUPLED SCHEME FOR THE APPROXIMATION OF A TRIPHASIC

    E-Print Network [OSTI]

    (lava-like molten mixture of portions of nuclear reactor core) and concrete (last confinement barrier accurate. For instance, in nuclear safety [18], the under- standing of interaction between molten corium-Hilliard model. In diffuse interfaces theory, the interfaces are assumed to have a non-zero thickness (which

  13. FOURTH ORDER PARTIAL DIFFERENTIAL EQUATIONS ON GENERAL GEOMETRIES

    E-Print Network [OSTI]

    FOURTH ORDER PARTIAL DIFFERENTIAL EQUATIONS ON GENERAL GEOMETRIES By John B. Greer Andrea L­0436 Phone: 612/624-6066 Fax: 612/626-7370 URL: http://www.ima.umn.edu #12;Fourth Order Partial Differential (Bertalm´io, Cheng, Osher, and Sapiro 2001) to fourth order PDEs including the Cahn- Hilliard equation

  14. Analysis of a finite element formulation for modelling phase separation

    E-Print Network [OSTI]

    Wells, G N; Garikipati, Krishna

    2007-01-01

    The Cahn-Hilliard equation is of importance in materials science and a range of other fields. It represents a diffuse interface model for simulating the evolution of phase separation in solids and fluids, and is a nonlinear fourth-order parabolic...

  15. Microstructural Evolution and interfacial motion in systems with diffusion barriers

    SciTech Connect (OSTI)

    Perry H. Leo

    2009-03-05

    This research program was designed to model and simulate phase transformations in systems containing diffusion barriers. The modeling work included mass flow, phase formation, and microstructural evolution in interdiffusing systems. Simulation work was done by developing Cahn-Hilliard and phase field equations governing both the temporal and spatial evolution of the composition and deformation fields and other important phase variables.

  16. Gianine Abdallah Ali A. Abdi

    E-Print Network [OSTI]

    Frantz, Kyle J.

    Daven C. Anderson Laura M. Anderson Matthew S. Andler Ivy M. Andrews Caitlin A. Andrews Nirvana M. Battles Kamisha L. Baxter Sabina Beglyarova Darlene E. Belen Ashley N. Bell Cristel R. Bender Brendan L

  17. A study of static and dynamic robustness of hydro/omniphobic surfaces

    E-Print Network [OSTI]

    Park, Kyoo Chul

    2010-01-01

    Liquid droplets in the Cassie-Baxter state form liquid-air interfaces that are not flat but distorted due to pressure differences across the interfaces between the asperities. These distorted interfaces play an essential ...

  18. Microsoft Word - Cohen-Goniometer bh

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

    on XPP until the MFX station is fully operational in 2016. Primary Citation A. E. Cohen, S. M. Soltis, A. Gonzlez, L. Aguila, R. Alonso-Mori, C. O. Barnes, E. L. Baxter, W....

  19. Journal of Data Science 6(2008), 135-154 A Statistical Approach for Dating Archaeological Contexts

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    2008-01-01

    sets), but also as a help to answer cer- tain archaeological and historical questions. The data set of contexts, but never on the scale of a whole town ((Djindjian, 1991); (Tyers and Orton, 1991); (Baxter, 1994

  20. Sustainable Development & Land Use Committee Meeting Meeting 2008-2009 #4

    E-Print Network [OSTI]

    2009 Present: Stephen Lloyd (Chair); Esther Barnett; Keith Baxter; Michel Caron; Astrid Grawehr.2 Minutes: Minutes of the meeting of 21 November 2008 were approved (Esther Barnett/David Jones) 4

  1. Pushing Boundaries on Performance & Design: the ClimateMaster...

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

    Pump - Part II September 01, 2013 The ORNL R&D 100 award winning team: Van Baxter, Ed Vineyard, Jeff Munk, Anthony Gehl, Moonis Ally, Keith Rice, and Bo Shen picture with the...

  2. Main Heading Caption describing picture or graphic.

    E-Print Network [OSTI]

    and make it easier to read. R P Documentary Film 11 AM Saturday November 8, 2014 Philippine Cultural Center 4857 Baxter Rd, Virginia Beach, VA 23462 "Rescue in The Philippines" is a onehour documentary

  3. September 2013 Most Viewed Documents for Environmental Sciences...

    Office of Scientific and Technical Information (OSTI)

    Soil Friday, G. P. (1999) 31 > Ammonia usage in vapor compression for refrigeration and air-conditioning in the United States Fairchild, P.D.; Baxter, V.D. (1995) 30 >...

  4. A Conceptual Model for Floodplains in the Sacramento-San Joaquin Delta

    E-Print Network [OSTI]

    Opperman, Jeffrey J.

    2012-01-01

    Biology Moyle PB, Baxter RD, Sommer TR, Foin TC, Matern SA.Society. p 83–138. Feyrer F, Sommer T, Harrell W. 2006a.2):115–126. Feyrer F, Sommer T, Harrell W. 2006b. Managing

  5. Three-dimensional Modeling of Tidal Hydrodynamics in the San Francisco Estuary

    E-Print Network [OSTI]

    Gross, Edward S.; MacWilliams, Michael L.; Kimmerer, Wim J.

    2009-01-01

    Series Feyrer F, Nobriga ML, Sommer TR. 2007. Multi- decadalScience B.V. p 343-357. Sommer T, Armor C, Baxter R, Breuerrelationships have changed (Sommer and others 2007). The

  6. Migration Patterns of Juvenile Winter-run-sized Chinook Salmon (Oncorhynchus tshawytscha) through the Sacramento–San Joaquin Delta

    E-Print Network [OSTI]

    2013-01-01

    Region. 844 p + appendices. Sommer TR, Nobriga ML, HarrellAquatic Sciences 58:325-333. Sommer T, Harrell W, Nobriga M.Management 26:685-701. Sommer T, Armor C, Baxter R, Breuer

  7. Benthic Assemblage Variability in the Upper San Francisco Estuary: A 27-Year Retrospective

    E-Print Network [OSTI]

    Peterson, Heather A; Vayssieres, Marc

    2010-01-01

    Special thanks go to Ted Sommer for his support of thisFishes Feyrer F, Nobriga ML, Sommer TR. 2007. Multi- decadalEstuaries 20(3):504–520. Sommer T, Armor C, Baxter R, Breuer

  8. Variation in Spring Nearshore Resident Fish Species Composition and Life Histories in the Lower San Joaquin Watershed and Delta

    E-Print Network [OSTI]

    Brown, Larry R.; May, Jason T.

    2006-01-01

    66:123–132. Feyrer F, Sommer TR, Baxter RD. 2005. Spatial-39, Bethesda, Maryland. p Sommer T, Harrell WC, Kurth R,Bethesda, Maryland. p 141–166. Sommer T, Harrell B, Nobriga

  9. Habitat Variability and Complexity in the Upper San Francisco Estuary

    E-Print Network [OSTI]

    Moyle, Peter B; Lund, Jay R.; Bennett, William A; Fleenor, William E.

    2010-01-01

    uc/item/0d52737t. Grimaldo LF, Sommer T, Van Ark N, Joes G,Science Moyle PB, Baxter RD, Sommer T, Foin TC, Matern SA.University Press. p 141-170. Sommer TR, Nobriga ML, Harrell

  10. Salinity Inhabited by Age-0 Splittail (Pogonichthys macrolepidotus) as Determined by Direct Field Observation and Retrospective Analyses with Otolith Chemistry

    E-Print Network [OSTI]

    Feyrer, Frederick; Hobbs, James; Sommer, Ted

    2010-01-01

    F, Hobbs JA, Baerwald M, Sommer T, YinQ, Clark K, May BP,Fisheries Society Feyrer F, Sommer TR, Baxter R. 2005.2005:159–168. Feyrer F, Sommer T, Harrell W. 2006. Managing

  11. Pre-Screen Loss and Fish Facility Efficiency for Delta Smelt at the South Delta's State Water Project, California

    E-Print Network [OSTI]

    2012-01-01

    266:753-762. Grimaldo LF, Sommer T, Van Ark N, Jones G,614-622. Feyrer F, Nobriga ML, Sommer TR. 2007. MultidecadalConservation Biology 4:275-284. Sommer T, Armor C, Baxter R,

  12. Phytoplankton in the Upper San Francisco Estuary: Recent Biomass Trends, Their Causes, and Their Trophic Significance

    E-Print Network [OSTI]

    Jassby, Alan

    2008-01-01

    Sciences 99(12):8101–8105. Sommer T, Harrell B, Nobriga M,Fisheries 26(8):6–16. Sommer T, Suits B, Mierzwa M, Wilde J.deltamodeling/models/ptm/ptm.cfm Sommer T, Armor C, Baxter

  13. Patterns in the Use of a Restored California Floodplain by Native and Alien Fishes

    E-Print Network [OSTI]

    Moyle, Peter B; Crain, Patrick K; Whitener, Keith

    2007-01-01

    of a natural floodplain (Sommer et al.2001a, The purpose ofNetherlands. Feyrer, F, Sommer, TR, Zeug, SC, O’Leary,G,Aquatic Sciences 60:773-786. Sommer, TR, Baxter, R, Herbold,

  14. 2014 Corporate Counsel Institute Contact: Peter Skrabacz (312) 503-4213 or peter.skrabacz@law.northwestern.edu AFFILIATE PROPOSAL

    E-Print Network [OSTI]

    Ottino, Julio M.

    management, and M&A Represented companies include: Ball Corporation Baxter International Inc. Biomet, Inc Investments, Inc. MillerCoors LLC Sara Lee Corporation Sonic Corp. SP Plus Corporation Tampa Bay Lightning

  15. 2014 Corporate Counsel Institute Contact: Peter Skrabacz (312) 503-4213 or peter.skrabacz@law.northwestern.edu FIRM AFFILIATE

    E-Print Network [OSTI]

    Ottino, Julio M.

    management, and M&A Represented companies include: Ball Corporation Baxter International Inc. Biomet, Inc Investments, Inc. MillerCoors LLC Sara Lee Corporation Sonic Corp. SP Plus Corporation Tampa Bay Lightning

  16. Millions on the Margins: Music, Ethnicity, and Censorship Among the Oromo of Ethiopia

    E-Print Network [OSTI]

    Mollenhauer, Shawn Michael

    2011-01-01

    37 The “African-ness” of Ethiopia……………………………………………………….47of the essential one-ness of Oromo culture (Baxter, Hultin &on or assumption of Oromo same-ness. While admitting the

  17. Mandarin Global Carbon Ltd | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View NewTexas:Montezuma,Information MHKMHK5Transport ProjectsIMichigan: EnergyManco Energy

  18. Mangalam Bio Energen Private Limited | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View NewTexas:Montezuma,Information MHKMHK5Transport ProjectsIMichigan: EnergyManco EnergyBio

  19. Mangonia Park, Florida: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View NewTexas:Montezuma,Information MHKMHK5Transport ProjectsIMichigan: EnergyMancoMangonia

  20. An Industry/DOE Program to Develop and Benchmark Advanced Diamond Product Drill Bits and HP/HT Drilling Fluids to Significantly Improve Rates of Penetration

    SciTech Connect (OSTI)

    TerraTek

    2007-06-30

    A deep drilling research program titled 'An Industry/DOE Program to Develop and Benchmark Advanced Diamond Product Drill Bits and HP/HT Drilling Fluids to Significantly Improve Rates of Penetration' was conducted at TerraTek's Drilling and Completions Laboratory. Drilling tests were run to simulate deep drilling by using high bore pressures and high confining and overburden stresses. The purpose of this testing was to gain insight into practices that would improve rates of penetration and mechanical specific energy while drilling under high pressure conditions. Thirty-seven test series were run utilizing a variety of drilling parameters which allowed analysis of the performance of drill bits and drilling fluids. Five different drill bit types or styles were tested: four-bladed polycrystalline diamond compact (PDC), 7-bladed PDC in regular and long profile, roller-cone, and impregnated. There were three different rock types used to simulate deep formations: Mancos shale, Carthage marble, and Crab Orchard sandstone. The testing also analyzed various drilling fluids and the extent to which they improved drilling. The PDC drill bits provided the best performance overall. The impregnated and tungsten carbide insert roller-cone drill bits performed poorly under the conditions chosen. The cesium formate drilling fluid outperformed all other drilling muds when drilling in the Carthage marble and Mancos shale with PDC drill bits. The oil base drilling fluid with manganese tetroxide weighting material provided the best performance when drilling the Crab Orchard sandstone.

  1. Two-dimensional Turbulence in Symmetric Binary-Fluid Mixtures: Coarsening Arrest by the Inverse Cascade

    E-Print Network [OSTI]

    Prasad Perlekar; Nairita Pal; Rahul Pandit

    2015-06-29

    We study two-dimensional (2D) binary-fluid turbulence by carrying out an extensive direct numerical simulation (DNS) of the forced, statistically steady turbulence in the coupled Cahn-Hilliard and Navier-Stokes equations. In the absence of any coupling, we choose parameters that lead (a) to spinodal decomposition and domain growth, which is characterized by the spatiotemporal evolution of the Cahn-Hilliard order parameter $\\phi$, and (b) the formation of an inverse-energy-cascade regime in the energy spectrum $E(k)$, in which energy cascades towards wave numbers $k$ that are smaller than the energy-injection scale $k_{inj}$ in the turbulent fluid. We show that the Cahn-Hilliard-Navier-Stokes coupling leads to an arrest of phase separation at a length scale $L_c$, which we evaluate from $S(k)$, the spectrum of the fluctuations of $\\phi$. We demonstrate that (a) $L_c \\sim L_H$, the Hinze scale that follows from balancing inertial and interfacial-tension forces, and (b) $L_c$ is independent, within error bars, of the diffusivity $D$. We elucidate how this coupling modifies $E(k)$ by blocking the inverse energy cascade at a wavenumber $k_c$, which we show is $\\simeq 2\\pi/L_c$. We compare our work with earlier studies of this problem.

  2. Two-dimensional Turbulence in Symmetric Binary-Fluid Mixtures: Coarsening Arrest by the Inverse Cascade

    E-Print Network [OSTI]

    Perlekar, Prasad; Pandit, Rahul

    2015-01-01

    We study two-dimensional (2D) binary-fluid turbulence by carrying out an extensive direct numerical simulation (DNS) of the forced, statistically steady turbulence in the coupled Cahn-Hilliard and Navier-Stokes equations. In the absence of any coupling, we choose parameters that lead (a) to spinodal decomposition and domain growth, which is characterized by the spatiotemporal evolution of the Cahn-Hilliard order parameter $\\phi$, and (b) the formation of an inverse-energy-cascade regime in the energy spectrum $E(k)$, in which energy cascades towards wave numbers $k$ that are smaller than the energy-injection scale $k_{inj}$ in the turbulent fluid. We show that the Cahn-Hilliard-Navier-Stokes coupling leads to an arrest of phase separation at a length scale $L_c$, which we evaluate from $S(k)$, the spectrum of the fluctuations of $\\phi$. We demonstrate that (a) $L_c \\sim L_H$, the Hinze scale that follows from balancing inertial and interfacial-tension forces, and (b) $L_c$ is independent, within error bars, o...

  3. Integrability vs exact solvability in the quantum Rabi and Dicke models

    E-Print Network [OSTI]

    Murray T. Batchelor; Huan-Qiang Zhou

    2015-01-05

    The Rabi model describes the simplest interaction between light and matter via a two-level quantum system interacting with a bosonic field. We demonstrate that the fully quantised version of the Rabi model is integrable in the Yang-Baxter sense at two parameter values. The model is argued to be not Yang-Baxter integrable in general. This is in contrast to the claim that the quantum Rabi model is integrable based on a phenomenological criterion of quantum integrability not presupposing the existence of a set of commuting operators. Similar Yang-Baxter integrable points are identified for the generalised Rabi model and the fully quantised Dicke model. The integrable points have particular implications for the level statistics of the Dicke model.

  4. The effect of high-pressure injection of gas on the reservoir volume factor of a crude oil 

    E-Print Network [OSTI]

    Honeycutt, Baxter Bewitt

    1957-01-01

    THE EFFECT OF HIGH-PRESSURE INJECTION OF GAS ON THE RESERVOIR VOLUME FACTOR OF A CRUDE OIL A Thesis By+ BAXTER DS'kONEYCUTT o Submitted to the Graduate School of the Agricultural and Mechanical College of Texas in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE August, i957 Major Subject: Petroleum Engineering THE EFFECT OF HIGH-PRESSURE INJECTION OF GAS ON THE RESERVOIR VOLUME FACTOR OF A CRUDE OIL A Thesis By BAXTER D. HONEYCUTT Appro d as to style...

  5. An Archaeological Survey for the Riverside Water Supply Corporation Warren Plant Improvements Project in Walker and San Jacinto Counties Texas 

    E-Print Network [OSTI]

    Moore, William

    2015-07-30

    Investigator, and Edward P. Baxter was the Project Archaeologist. No new sites were found as a result of this investigation. Six previously recorded sites are within or near the Area of Potential Effect (APE), and shovel tests were excavated in the APE...

  6. Neuron 51, 359368, August 3, 2006 2006 Elsevier Inc. DOI 10.1016/j.neuron.2006.06.030 Reduction of Information Redundancy

    E-Print Network [OSTI]

    ), efficient use of storage (Barlow, 1961; Miller, 1956) or energy resources (Levy and Baxter, 1996, 2002-induced redundancy in the neural responses to a set of natural sounds in three successive stations of the auditory substantially more redundant than A1 and MGB neurons. IC redundancy was largely related to frequency selectivity

  7. An Archaeological Survey for the Walker County Special Utility District Water System Improvement Project in Central Walker County Texas 

    E-Print Network [OSTI]

    Moore, William; Baxter, William

    2015-07-28

    the Principal Investigator and Edward P. Baxter the Project Archaeologist. In all, 8.2 acres were examined. No archaeological sites (prehistoric or historic) were found, and no artifacts were collected. It is recommended that the project be allowed to proceed...

  8. Approved Module Information for LE3025, 2014/5 Module Title/Name: Leadership & Management

    E-Print Network [OSTI]

    Neirotti, Juan Pablo

    . Students will continue to learn how to: select and use data and information from primary sources (eApproved Module Information for LE3025, 2014/5 Module Title/Name: Leadership & Management Module? Not Specified Module Credits: 20 Module Management Information Module Leader Name Judith Baxter

  9. Approved Module Information for LE3024, 2014/5 Module Title/Name: Leadership & Management

    E-Print Network [OSTI]

    Neirotti, Juan Pablo

    will learn how to: select and use data and information from primary sources (e.g. authentic dataApproved Module Information for LE3024, 2014/5 Module Title/Name: Leadership & Management Module? Not Specified Module Credits: 20 Module Management Information Module Leader Name Judith Baxter

  10. Water skin anomalies: density, elasticity, hydrophobicity, thermal stability, interface repulsivity, etc

    E-Print Network [OSTI]

    Chang Q. Sun

    2015-02-26

    Molecular undercoordination induced O:H-O bond relaxation and dual polarization dictates the supersolid behavior of water skins interacting with other substances such as flowing in nanochannels, dancing of water droplets, floating of insects. The BOLS-NEP notion unifies the Wenzel-Cassie-Baxter models and explains controllable transition between hydrophobicity and hydrophilicity.

  11. January 15, 2013 FUNDAMENTALS OF NUCLEAR

    E-Print Network [OSTI]

    Shultis, J. Kenneth

    .3, first equation (Bailey) eV/s eV s p. 27 5th line Sec. 2.2.2 (Baxter) ...a decrease... ...an increase s + m2 n) p. 191, Example 7.5 (Bellinger) 54 Mn, 55 Mn, 54 and N55 55 Mn, 56 Mn, 55 and N56 , respec. p

  12. January 15, 2013 FUNDAMENTALS OF NUCLEAR

    E-Print Network [OSTI]

    Shultis, J. Kenneth

    .3, first equation (Bailey) eV/s eV s p. 27 5th line Sec. 2.2.2 (Baxter) ...a decrease... ...an increase, Example 7.5 (Bellinger) 54 Mn, 55 Mn, # 54 and N 55 55 Mn, 56 Mn, # 55 and N 56 , respec. p. 203, top

  13. Integrable double deformation of the principal chiral model

    E-Print Network [OSTI]

    Francois Delduc; Marc Magro; Benoit Vicedo

    2014-10-29

    We define a two-parameter family of integrable deformations of the principal chiral model on an arbitrary compact group. The Yang-Baxter sigma-model and the principal chiral model with a Wess-Zumino term both correspond to limits in which one of the two parameters vanishes.

  14. Updated 3/19/2009 W.V.T. RUSCH ENGINEERING HONORS COLLOQUIUM

    E-Print Network [OSTI]

    Zhou, Chongwu

    Engineering Prof., UCSD, President, Viterbi Group 21 "The Methanol Economy," Prof. George Olah, Nobel LaureateUpdated 3/19/2009 W.V.T. RUSCH ENGINEERING HONORS COLLOQUIUM FALL 2008 SEMESTER OHE 122, 1:00pm ­ 1 Manager, Jet Propulsion Laboratory 19 "Engineering Our Way to Better Medical Devices," Dr. Walt Baxter

  15. RetrofitNYC Advancing Energy Efficiency in New York

    E-Print Network [OSTI]

    Smerdon, Jason E.

    ) is a New York City (NYC) based, independent non- profit energy efficiency resource center and networkingRetrofitNYC Advancing Energy Efficiency in New York City Multifamily Buildings #12;#12;Foreword. Advancing Energy Efficiency in New York City Multifamily Buildings. By Tan, D., Baxter, M., Leung, E., Meyer

  16. Movements of Brown Shrimp, Penaeus aztecus, and Pink Shrimp, P. duorarum, Relative to the

    E-Print Network [OSTI]

    Movements of Brown Shrimp, Penaeus aztecus, and Pink Shrimp, P. duorarum, Relative to the U.S.-Mexico Border in the Western Gulf of Mexico PETER F. SHERIDAN, FRANK J. PATELLA, Jr., NEAL BAXTER, and DENNIS A of Mexico. Annual U.S. landings of brown shrimp off Texas averaged 13,800 metric tons (t) between 1970

  17. Customer Service Specialist Job Number: 54844874

    E-Print Network [OSTI]

    Heller, Barbara

    Customer Service Specialist Job Number: 54844874 Company Name: Baxter International, Inc Job to the customer and/or the sales team including any corrective actions needed to prevent the failure in the future: Medical Information, Distribution Centers, Planning and Deployment, Credit and Collections, Customer

  18. Catherine Barrera Director of Research Administration

    E-Print Network [OSTI]

    Bustamante, Fabián E.

    Catherine Barrera Director of Research Administration c-barrera@northwestern.edu Tech L365 Phone-lueptow@northwestern.edu Tech L254 Phone: 847.491.3553 Elizabeth Tang Assistant Director of Research Administration e Associate Research Administrator, McC Admin, Federal Stimulus Funding, Baxter-NU Alliance, IUSSTF, Center

  19. Sustainable Development & Land Use Committee Meeting Meeting 2010-2011

    E-Print Network [OSTI]

    will be made available on the SD&LU web page. 5. SDAG Report - Katrina Kroeze The SDAG held their first meeting by the end of January 2011. - Keith Baxter mentioned that the Johnson basement was very dark with the dark

  20. University of Sussex Life Sciences

    E-Print Network [OSTI]

    Sussex, University of

    .sussex.ac.uk/lifesci/clokelab My group focuses on using organometallic chemistry to transform carbon monoxide or carbon dioxide of biological interest and the properties of heterocyclic drugs and natural products. Jon Baxter www of them. Hazel Cox www.sussex.ac.uk/lifesci/coxlab We use quantum theory to determine the properties

  1. Assuring the Safety, Security, and Reliability of Medical-Device Cyber-

    E-Print Network [OSTI]

    Hu, Fei

    · Difibtech external defibrillators (2007) ­ Self-test resets low-battery status · Baxter's Colleague Infusion of adverse events associated with the use of infusion pumps - 1% deaths, 34% serious injuries - 87 infusion and Radiological Health. White Paper: Infusion Pump Improvement Initiative, April 2010 Infusion Pump Safety #12

  2. Seismic Screening, Evaluation, Rehabilitation, and Design Provisions for Wood-Framed Structures

    E-Print Network [OSTI]

    Gupta, Rakesh

    Seismic Screening, Evaluation, Rehabilitation, and Design Provisions for Wood-Framed Structures Preston Baxter, M.ASCE1 ; Thomas H. Miller, M.ASCE2 ; and Rakesh Gupta, M.ASCE3 Abstract: Seismic Database subject headings: Seismic analysis; Seismic design; Wood structures; Shear walls; Diaphragms

  3. Estimating overdispersion in the assessment of crime reduction interventions Paul R. Marchant, Leeds Metropolitan University, School of Information m

    E-Print Network [OSTI]

    Barber, Stuart

    , Leeds Metropolitan University, School of Information m Management, Leeds, LS6 3QS; email: p.marchant@leedsmet.ac.uk; phone: 0113 283 6109; fax: 0113 283 7599 Paul D. Baxter* and Stuart Barber, University of Leeds, Department of Statistics, Leeds LS2 9JT; email: pdbaxt@maths.leeds.ac.uk, stuart@maths.leeds.ac.uk; phone

  4. Two--poles R-matrices

    E-Print Network [OSTI]

    M. Talon

    1992-10-02

    We study integrable dynamical systems described by a Lax pair involving a spectral parameter. By solving the classical Yang-Baxter equation when the R-matrix has two poles we show that they can be interpreted as natural motions on a twisted loop algebra.

  5. October 2014 EPL, 108 (2014) 24001 www.epljournal.org

    E-Print Network [OSTI]

    Mahadevan, L.

    2014-01-01

    mica surface, which is a hy- drophilic surface with a vanishing contact angle, as shown in fig. 1(b surfaces that are special: heated beyond the boil- ing temperature of the impacting liquid [6] or superhy- drophobic; textured and functionalized to comply with a Cassie-Baxter state, wherein the liquid is supported

  6. 1 Copyright 2011 by ASME Proceedings of the ASME/JSME 2011 8th

    E-Print Network [OSTI]

    Hidrovo, Carlos H.

    in superhydrophobic microfluidic channels. Herein we characterize the wetting behavior as a function of temperature the amplifying effect that surface texturing has on the Young's contact angle under fully liquid imbibed conditions. The Cassie-Baxter state models the macroscopic contact angle formed when air pockets exist within

  7. Investigations of Ozone and Particulate Matter Air Pollution in the Northeast C.R. Philbrick, Dept. of Electrical Engineering, Penn State University, University Park, PA 16802

    E-Print Network [OSTI]

    at the Baxter Water Treatment Plant began on 15 June 1999 and the site was fully operational from 28 June to 19Investigations of Ozone and Particulate Matter Air Pollution in the Northeast C.R. Philbrick, Dept a significant pollution event, during which substantial increases in both ozone (concentration 125 ppb) and air

  8. Mesoscopic theory of the viscoelasticity of polymers

    E-Print Network [OSTI]

    S. M. Chitanvis

    1999-01-26

    We have advanced our previous static theory of polymer entanglement involving an extended Cahn-Hilliard functional, to include time-dependent dynamics. We go beyond the Gaussian approximation, to the one-loop level, to compute the frequency dependent storage and loss moduli of the system. The three parameters in our theory are obtained by fitting to available experimental data on polystyrene melts of various chain lengths. This provides a physical representation of the parameters in terms of the chain length of the system. We discuss the importance of the various terms in our energy functional with respect to their contribution to the viscoelastic response of the polymeric system.

  9. Helices in the wake of precipitation fronts

    E-Print Network [OSTI]

    Shibi Thomas; Istvan Lagzi; Ferenc Molnar Jr; Zoltan Racz

    2013-08-30

    A theoretical study of the emergence of helices in the wake of precipitation fronts is presented. The precipitation dynamics is described by the Cahn-Hilliard equation and the fronts are obtained by quenching the system into a linearly unstable state. Confining the process onto the surface of a cylinder and using the pulled-front formalism, our analytical calculations show that there are front solutions that propagate into the unstable state and leave behind a helical structure. We find that helical patterns emerge only if the radius of the cylinder R is larger than a critical value R>R_c, in agreement with recent experiments.

  10. Continuous space-time symmetries in a lattice field theory

    E-Print Network [OSTI]

    H. B. Thacker

    1998-09-18

    For purposes of regularization as well as numerical simulation, the discretization of Lorentz invariant continuum field theories on a space-time lattice is often convenient. In general, this discretization destroys the rotational or Lorentz-frame independence of the theory, which is only recovered in the continuum limit. The Baxter 8-vertex model may be interpreted as a particular discretization of a self-interacting massive Dirac fermion theory in two dimensions (the massive Thirring model). Here it is shown that, in the 8-vertex/massive Thirring model, the Lorentz frame independence of the theory remains undisturbed on the lattice. The only effect of the discretization is to compactify the manifold of Lorentz frames. The relationship between this lattice Lorentz symmetry and the Yang-Baxter relations is discussed.

  11. Fossil fungi from America Pennsylvanian coal balls

    E-Print Network [OSTI]

    Baxter, R. W.

    1975-05-29

    THE UNIVERSITY OF KANSAS PALEONTOLOGICAL CONTRIBUTIONS May 29, 1975 Paper 77 FOSSIL FUNGI FROM AMERICAN PENNSYLVANIAN COAL BALLS' ROBERT W. BAXTER University of Kansas, Lawrence, Kansas ABSTRACT The current status of knowledge regarding fossil... fungi from American Pennsylvanian coal balls is discussed under the following general headings: 1) Phycomycetes, 2) Asco- mycetes, 3) Basidiomycetes, 4) fungal sclerotia, 5) mycorrhizal fungi, and 6) "fleshy fungi." Protoascon missouriensis...

  12. UConn Health Department of Pharmacy

    E-Print Network [OSTI]

    Oliver, Douglas L.

    agents (e.g. write on or label the box, remove the filter, remove the package insert) or JDH Pharmacy:RCo trough level >50% 2 For up to 7 days References: LexiComp, NovoSeven RT (NovoNordisk) package insert http://www.novo-pi.com/novosevenrt.pdf Recombinate (Baxter) package insert http://factorviia.com/pi.pdf BeneFix (Wyeth) package insert http://www

  13. Parental Differences in Infant-Directed Emotional Communication 

    E-Print Network [OSTI]

    Goodman, Lynnel 1990-

    2012-04-30

    an adult who presents an emotional cue. They also look at how the baby approaches (Mumme, Fernald, & Herrera, 1996; Walden & Baxter, 1989 ), plays with(Moses, Baldwin, _______________ This thesis follows the style of Developmental Psychology. 2... Rosicky, Tidball, 2001; Mumme & Fernald, 2003), or looks at the toys. Using this procedure, Mumme, Fernald, & Herrera (1996) also indicated that at 1 year old, infants can interpret the emotional expressions of adults and determine the relevance...

  14. This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research

    E-Print Network [OSTI]

    Mora, Miguel A.

    Chihuahua and Veracruz, Mexico M.A. Mora a,*, C. Baxter a , J.L. Sericano b , A.B. Montoya c , J.C. Gallardo Neuroetología, Universidad Veracruzana, Xalapa, Veracruz 91190, Mexico a r t i c l e i n f o Article history falcon PBDEs PCBs DDE Mexico a b s t r a c t Eggs from aplomado falcons (Falco femoralis septentrionalis

  15. Dynamical mean-field theory and weakly non-linear analysis for the phase separation of active Brownian particles

    E-Print Network [OSTI]

    Thomas Speck; Andreas M. Menzel; Julian Bialké; Hartmut Löwen

    2015-03-29

    Recently, we have derived an effective Cahn-Hilliard equation for the phase separation dynamics of active Brownian particles by performing a weakly non-linear analysis of the effective hydrodynamic equations for density and polarization [Phys. Rev. Lett. 112, 218304 (2014)]. Here we develop and explore this strategy in more detail and show explicitly how to get to such a large-scale, mean-field description starting from the microscopic dynamics. The effective free energy emerging from this approach has the form of a conventional Ginzburg-Landau function. On the coarsest scale, our results thus agree with the mapping of active phase separation onto that of passive fluids with attractive interactions through a global effective free energy (mobility-induced phase transition). Particular attention is paid to the square-gradient term necessary for the dynamics. We finally discuss results from numerical simulations corroborating the analytical results.

  16. Enhanced phase segregation induced by dipolar interactions in polymer blends

    E-Print Network [OSTI]

    Rajeev Kumar; Bobby G. Sumpter; M. Muthukumar

    2014-11-03

    We present a generalized theory for studying phase separation in blends of polymers containing dipoles on their backbone. The theory is used to construct co-existence curves and to study the effects of dipolar interactions on interfacial tension for a planar interface between the coexisting phases. We show that a mismatch in monomeric dipole moments, or equivalently a mismatch in the dielectric constant of the pure components, leads to destabilization of the homogeneous phase. Corrections to the Flory-Huggins phase diagram are predicted using the theory. Furthermore, we show that the interfacial tension increases with an increase in the mismatch of the dipole moments of the components. Density profiles and interfacial tensions are constructed for diffuse and sharp polymer-polymer interfaces by extending the formalisms of Cahn-Hilliard and Helfand-Tagami-Sapse, respectively.

  17. Binary-Fluid Turbulence: Signatures of Multifractal Droplet Dynamics and Dissipation Reduction

    E-Print Network [OSTI]

    Pal, Nairita; Gupta, Anupam; Pandit, Rahul

    2016-01-01

    We present an extensive direct numerical simulation of statistically steady, homogeneous, isotropic turbulence in two-dimensional, binary-fluid mixtures with air-drag-induced friction by using the Cahn-Hilliard-Navier-Stokes equations. We choose parameters, e.g., the surface tension, such that we have a droplet of the minority phase moving inside a turbulent background of the majority phase. We characterize the deformation of the droplet and show that it displays multifractal dynamics. The probability distribution functions of the components of the acceleration of the center of mass of the droplet exhibit wide, non-Gaussian tails. Our study reveals that the droplet enhances the energy spectrum $E(k)$ when the wavenumber $k$ is large; this enhancement leads to dissipation reduction.

  18. On the absence of simultaneous reflection and transmission in integrable impurity systems

    E-Print Network [OSTI]

    O. A. Castro-Alvaredo; A. Fring; F. Göhmann

    2002-06-01

    We establish that the Yang-Baxter equations in the presence of an impurity can in general only admit solutions of simultaneous tranmission and reflection when the transmission and reflection amplitudes commute in the defect degrees of freedom with an additional exchange of the corresponding rapidities. In the absence of defect degrees of freedom we show in complete generality, that the only exceptions to this are theories which possess rapidity independent bulk scattering matrices. In particular bulk theories with diagonal scattering matrices, can only be the free Boson and Fermion, the Federbush model and their generalizations. These anyonic solutions do not admit the possibility of excited impurity states.

  19. Fusion hierarchies for N = 4 superYang-Mills theory

    E-Print Network [OSTI]

    A. V. Belitsky

    2008-04-12

    We employ the analytic Bethe Anzats to construct eigenvalues of transfer matrices with finite-dimensional atypical representations in the auxiliary space for the putative long-range spin chain encoding anomalous dimensions of all composite single-trace gauge invariant operators of the maximally supersymmetric Yang-Mills theory. They obey an infinite fusion hierarchy which can be reduced to a finite set of integral relations for a minimal set of transfer matrices. This set is used to derive a finite systems of functional equations for eigenvalues of nested Baxter polynomials.

  20. Rise and fall of a tactic: the ram in nineteenth century naval doctrine 

    E-Print Network [OSTI]

    Johnson, Robert Leroy

    1989-01-01

    , the chests reached velocities of between four and six meters per second and U. S. , Congress, House of Representatives, Report Number 681: "War Steamers, " to accompany bill H. R. $448 (29th Congress, 1st Session, 20 May, 1846), 27. Barron, "Prow Ship", p.... , 158; "A Royal Navy Officer", "Tactical Results of Recent Naval Construction, " Naval Science, Vol. 2 No. 2 (AP '1, 1873), 1397 Ed d J 2 d, ~0 ~ld 88 ((. o d: JoR M 9, 1869), 20. Baxter, Introduction of the Ironclad Warshi , 100. U. S. , Department...

  1. RSOS Quantum Chains Associated with Off-Critical Minimal Models and $\\mathbb{Z}_n$ Parafermions

    E-Print Network [OSTI]

    Davide Bianchini; Elisa Ercolessi; Paul A. Pearce; Francesco Ravanini

    2014-12-16

    We consider the $\\varphi_{1,3}$ off-critical perturbation ${\\cal M}(m,m';t)$ of the general non-unitary minimal models where $2\\le m\\le m'$ and $m, m'$ are coprime and $t$ measures the departure from criticality corresponding to the $\\varphi_{1,3}$ integrable perturbation. We view these models as the continuum scaling limit in the ferromagnetic Regime III of the Forrester-Baxter Restricted Solid-On-Solid (RSOS) models on the square lattice. We also consider the RSOS models in the antiferromagnetic Regime II related in the continuum scaling limit to $\\mathbb{Z}_n$ parfermions with $n=m'-2$. Using an elliptic Yang-Baxter algebra of planar tiles encoding the allowed face configurations, we obtain the Hamiltonians of the associated quantum chains defined as the logarithmic derivative of the transfer matrices with periodic boundary conditions. The transfer matrices and Hamiltonians act on a vector space of paths on the $A_{m'-1}$ Dynkin diagram whose dimension is counted by generalized Fibonacci numbers.

  2. W-Extended Fusion Algebra of Critical Percolation

    E-Print Network [OSTI]

    Jorgen Rasmussen; Paul A. Pearce

    2008-04-28

    Two-dimensional critical percolation is the member LM(2,3) of the infinite series of Yang-Baxter integrable logarithmic minimal models LM(p,p'). We consider the continuum scaling limit of this lattice model as a `rational' logarithmic conformal field theory with extended W=W_{2,3} symmetry and use a lattice approach on a strip to study the fundamental fusion rules in this extended picture. We find that the representation content of the ensuing closed fusion algebra contains 26 W-indecomposable representations with 8 rank-1 representations, 14 rank-2 representations and 4 rank-3 representations. We identify these representations with suitable limits of Yang-Baxter integrable boundary conditions on the lattice and obtain their associated W-extended characters. The latter decompose as finite non-negative sums of W-irreducible characters of which 13 are required. Implementation of fusion on the lattice allows us to read off the fusion rules governing the fusion algebra of the 26 representations and to construct an explicit Cayley table. The closure of these representations among themselves under fusion is remarkable confirmation of the proposed extended symmetry.

  3. The colored Kitaev chain with triple degeneracy

    E-Print Network [OSTI]

    Li-Wei Yu; Mo-Lin Ge

    2015-07-19

    We construct the 1D colored Kitaev model based on the solution of Yang-Baxter equation. We show that the colored Kitaev model possesses both triple degenerate ground states and non-trivial topological winding number. Hence, the colored Kitaev model is a direct generalization of 1D Kitaev model. On the other hand, inspired by the 3-body Majorana model proposed by Lee and Wilczek, we define a new 3-body Hamiltonian $\\hat{H}_{123}$ based on Yang-Baxter equation. Different from the Majorana doubling, $\\hat{H}_{123}$ holds triple degeneracy in each energy level. The triple degeneracy is protected by two symmetry operators of the system, $\\omega$-parity $P$($\\omega=e^{{\\textrm{i}\\frac{2\\pi}{3}}}$) and emergent operator $\\Gamma$, which are the generalization of parity $P_{M}$ and emergent Majorana operator in Lee-Wilczek model, respectively. Both the colored Kitaev model and $\\hat{H}_{123}$ are SU(3)-like models in color space. In comparison with the Majorana models at SU(2)-level, we find that the SU(3)-like models are exactly the generalization of Majorana models.

  4. Early stages of spinodal decomposition in Fe–Cr resolved by in-situ small-angle neutron scattering

    SciTech Connect (OSTI)

    Hörnqvist, M. Thuvander, M.; Steuwer, A.; King, S.; Odqvist, J.; Hedström, P.

    2015-02-09

    In-situ, time-resolved small-angle neutron scattering (SANS) investigations of the early stages of the spinodal decomposition process in Fe–35Cr were performed at 773 and 798?K. The kinetics of the decomposition, both in terms of characteristic distance and peak intensity, followed a power-law behaviour from the start of the heat treatment (a?{sup ?}=?0.10–0.11 and a??=?0.67–0.86). Furthermore, the method allows tracking of the high–Q slope, which is a sensitive measure of the early stages of decomposition. Ex-situ SANS and atom probe tomography were used to verify the results from the in-situ investigations. Finally, the in-situ measurement of the evolution of the characteristic distance at 773?K was compared with the predictions from the Cahn-Hilliard-Cook model, which showed good agreement with the experimental data (a?{sup ?}=?0.12–0.20 depending on the assumed mobility)

  5. Theory of phase separation and polarization for dissociated ionic liquids

    E-Print Network [OSTI]

    Nir Gavish; Arik Yochelis

    2015-12-17

    Room temperature ionic liquids are attractive to numerous applications and particularly, to renewable energy devices. As solvent free electrolytes, they demonstrate a paramount connection between the material morphology and Coulombic interactions: unlike dilute electrolytes, the electrode/RTIL interface is a product of both electrode polarization and spatiotemporal bulk properties. Yet, theoretical studies have dealt almost exclusively with independent models of morphology and electrokinetics. In this work, we develop a novel Cahn-Hilliard-Poisson type mean-field framework that couples morphological evolution with electrokinetic phenomena. Linear analysis of the model shows that spatially periodic patterns form via a finite wavenumber instability, a property that cannot arise in the currently used Fermi-Poisson-Nernst-Planck equations. Numerical simulations in above one-space dimension, demonstrate that while labyrinthine type patterns develop in the bulk, stripe patterns emerge near charged surfaces. The results qualitatively agree with empirical observations and thus, provide a physically consistent methodology to incorporate phase separation properties into an electrochemical framework.

  6. Scalable Nonlinear Solvers for Fully Implicit Coupled Nuclear Fuel Modeling. Final Report

    SciTech Connect (OSTI)

    Cai, Xiao-Chuan; Keyes, David; Yang, Chao; Zheng, Xiang; Pernice, Michael

    2014-09-29

    The focus of the project is on the development and customization of some highly scalable domain decomposition based preconditioning techniques for the numerical solution of nonlinear, coupled systems of partial differential equations (PDEs) arising from nuclear fuel simulations. These high-order PDEs represent multiple interacting physical fields (for example, heat conduction, oxygen transport, solid deformation), each is modeled by a certain type of Cahn-Hilliard and/or Allen-Cahn equations. Most existing approaches involve a careful splitting of the fields and the use of field-by-field iterations to obtain a solution of the coupled problem. Such approaches have many advantages such as ease of implementation since only single field solvers are needed, but also exhibit disadvantages. For example, certain nonlinear interactions between the fields may not be fully captured, and for unsteady problems, stable time integration schemes are difficult to design. In addition, when implemented on large scale parallel computers, the sequential nature of the field-by-field iterations substantially reduces the parallel efficiency. To overcome the disadvantages, fully coupled approaches have been investigated in order to obtain full physics simulations.

  7. Integrated Heat Pump HVAC Systems for Near-Zero-Energy Homes - Business Case Assessment

    SciTech Connect (OSTI)

    Baxter, Van D

    2007-05-01

    The long range strategic goal of the Department of Energy's Building Technologies (DOE/BT) Program is to create, by 2020, technologies and design approaches that enable the construction of net-zero energy homes at low incremental cost (DOE/BT 2005). A net zero energy home (NZEH) is a residential building with greatly reduced needs for energy through efficiency gains, with the balance of energy needs supplied by renewable technologies. While initially focused on new construction, these technologies and design approaches are intended to have application to buildings constructed before 2020 as well resulting in substantial reduction in energy use for all building types and ages. DOE/BT's Emerging Technologies (ET) team is working to support this strategic goal by identifying and developing advanced heating, ventilating, air-conditioning, and water heating (HVAC/WH) technology options applicable to NZEHs. Although the energy efficiency of heating, ventilating, and air-conditioning (HVAC) equipment has increased substantially in recent years, new approaches are needed to continue this trend. Dramatic efficiency improvements are necessary to enable progress toward the NZEH goals, and will require a radical rethinking of opportunities to improve system performance. The large reductions in HVAC energy consumption necessary to support the NZEH goals require a systems-oriented analysis approach that characterizes each element of energy consumption, identifies alternatives, and determines the most cost-effective combination of options. In particular, HVAC equipment must be developed that addresses the range of special needs of NZEH applications in the areas of reduced HVAC and water heating energy use, humidity control, ventilation, uniform comfort, and ease of zoning. In FY05 ORNL conducted an initial Stage 1 (Applied Research) scoping assessment of HVAC/WH systems options for future NZEHs to help DOE/BT identify and prioritize alternative approaches for further development. Eleven system concepts with central air distribution ducting and nine multi-zone systems were selected and their annual and peak demand performance estimated for five locations: Atlanta (mixed-humid), Houston (hot-humid), Phoenix (hot-dry), San Francisco (marine), and Chicago (cold). Performance was estimated by simulating the systems using the TRNSYS simulation engine (Solar Energy Laboratory et al. 2006) in two 1800-ft{sup 2} houses--a Building America (BA) benchmark house and a prototype NZEH taken from BEopt results at the take-off (or crossover) point (i.e., a house incorporating those design features such that further progress towards ZEH is through the addition of photovoltaic power sources, as determined by current BEopt analyses conducted by NREL). Results were summarized in a project report, 'HVAC Equipment Design options for Near-Zero-Energy Homes--A Stage 2 Scoping Assessment', ORNL/TM-2005/194 (Baxter 2005). The 2005 study report describes the HVAC options considered, the ranking criteria used, and the system rankings by priority. Table 1 summarizes the energy savings potential of the highest scoring options from the 2005 study for all five locations. All system options were scored by the ORNL building equipment research team and by William Goetzler of Navigant Consulting. These scores were reviewed by DOE/BT's Residential Integration program leaders and Building America team members. Based on these results, the two centrally ducted integrated heat pump (IHP) systems (air source and ground source versions) were selected for advancement to Stage 2 (Exploratory Development) business case assessments in FY06. This report describes results of these business case assessments. It is a compilation of three separate reports describing the initial business case study (Baxter 2006a), an update to evaluate the impact of an economizer cooling option (Baxter 2006b), and a second update to evaluate the impact of a winter humidification option (Baxter 2007). In addition it reports some corrections made subsequent to release of the first two reports to correct so

  8. Quiver gauge theories and integrable lattice models

    E-Print Network [OSTI]

    Junya Yagi

    2015-06-30

    We discuss connections between certain classes of supersymmetric quiver gauge theories and integrable lattice models from the point of view of topological quantum field theories (TQFTs). The relevant classes include 4d $\\mathcal{N} = 1$ theories known as brane box and brane tilling models, 3d $\\mathcal{N} = 2$ and 2d $\\mathcal{N} = (2,2)$ theories obtained from them by compactification, and 2d $\\mathcal{N} = (0,2)$ theories closely related to these theories. We argue that their supersymmetric indices carry structures of TQFTs equipped with line operators, and as a consequence, are equal to the partition functions of lattice models. The integrability of these models follows from the existence of extra dimension in the TQFTs, which emerges after the theories are embedded in M-theory. The Yang-Baxter equation expresses the invariance of supersymmetric indices under Seiberg duality and its lower-dimensional analogs.

  9. On Affine Fusion and the Phase Model

    E-Print Network [OSTI]

    Mark A. Walton

    2012-11-15

    A brief review is given of the integrable realization of affine fusion discovered recently by Korff and Stroppel. They showed that the affine fusion of the $su(n)$ Wess-Zumino-Novikov-Witten (WZNW) conformal field theories appears in a simple integrable system known as the phase model. The Yang-Baxter equation leads to the construction of commuting operators as Schur polynomials, with noncommuting hopping operators as arguments. The algebraic Bethe ansatz diagonalizes them, revealing a connection to the modular S matrix and fusion of the $su(n)$ WZNW model. The noncommutative Schur polynomials play roles similar to those of the primary field operators in the corresponding WZNW model. In particular, their 3-point functions are the $su(n)$ fusion multiplicities. We show here how the new phase model realization of affine fusion makes obvious the existence of threshold levels, and how it accommodates higher-genus fusion.

  10. Kirkland gets license in hot Philippines area

    SciTech Connect (OSTI)

    Kirkland, A.S.

    1992-08-03

    This paper reports that Kirkland As, Oslo, has received a geophysical survey and exploration contract (GSEC) in a sizzling exploration and development theater off the Philippines. The license covers about 6,000 sq miles of undisputed waters, with depths mostly less than 300 ft, and lies in the Reed Bank area off Northwest Palawan Island, where several major oil and gas strikes have been made recently. Kirkland has 1 year in which to carry out its seismic work commitment. The terms of the GSEC then give an option to drill one well in a 6 month period. Once the results have been analyzed, the company can either drill another well or enter into a service contract for the license. Kirkland has a 65% share in the license, with the remainder split between Philippine companies Philodrill Corp., Beguet Mining Corp. subsidiary Petrofields, and Seafront Resources Corp. The Philippines is one of Kirkland's main areas of activity, the Kirkland Commercial Manager Ralph Baxter.

  11. Bulk, surface and corner free energy series for the chromatic polynomial on the square and triangular lattices

    E-Print Network [OSTI]

    Jesper Lykke Jacobsen

    2010-06-11

    We present an efficient algorithm for computing the partition function of the q-colouring problem (chromatic polynomial) on regular two-dimensional lattice strips. Our construction involves writing the transfer matrix as a product of sparse matrices, each of dimension ~ 3^m, where m is the number of lattice spacings across the strip. As a specific application, we obtain the large-q series of the bulk, surface and corner free energies of the chromatic polynomial. This extends the existing series for the square lattice by 32 terms, to order q^{-79}. On the triangular lattice, we verify Baxter's analytical expression for the bulk free energy (to order q^{-40}), and we are able to conjecture exact product formulae for the surface and corner free energies.

  12. Multiparameter statistical models from $N^2\\times N^2$ braid matrices: Explicit eigenvalues of transfer matrices ${\\bf T}^{(r)}$, spin chains, factorizable scatterings for all $N$

    E-Print Network [OSTI]

    B. Abdesselam; A. Chakrabarti

    2008-07-02

    For a class of multiparameter statistical models based on $N^2\\times N^2$ braid matrices the eigenvalues of the transfer matrix ${\\bf T}^{(r)}$ are obtained explicitly for all $(r,N)$. Our formalism yields them as solutions of sets of linear equations with simple constant coefficients. The role of zero-sum multiplets constituted in terms of roots of unity is pointed out and their origin is traced to circular permutations of the indices in the tensor products of basis states induced by our class of ${\\bf T}^{(r)}$ matrices. The role of free parameters, increasing as $N^2$ with $N$, is emphasized throughout. Spin chain Hamiltonians are constructed and studied for all $N$. Inverse Cayley transforms of Yang-Baxter matrices corresponding to our braid matrices are obtained for all $N$. They provide potentials for factorizable $S$-matrices. Main results are summarized and perspectives are indicated in the concluding remarks.

  13. Pre-alternative algebras and pre-alternative bialgebras

    E-Print Network [OSTI]

    Xiang Ni; Chengming Bai

    2009-07-20

    We introduce a notion of pre-alternative algebra which may be seen as an alternative algebra whose product can be decomposed into two pieces which are compatible in a certain way. It is also the "alternative" analogue of a dendriform dialgebra or a pre-Lie algebra. The left and right multiplication operators of a pre-alternative algebra give a bimodule structure of the associated alternative algebra. There exists a (coboundary) bialgebra theory for pre-alternative algebras, namely, pre-alternative bialgebras, which exhibits all the familiar properties of the famous Lie bialgebra theory. In particular, a pre-alternative bialgebra is equivalent to a phase space of an alternative algebra and our study leads to what we called $PA$-equations in a pre-alternative algebra, which are analogues of the classical Yang-Baxter equation.

  14. On connection matrices of quantum Knizhnik-Zamolodchikov equations based on Lie super algebras

    E-Print Network [OSTI]

    W. Galleas; J. V. Stokman

    2015-10-19

    We propose a new method to compute connection matrices of quantum Knizhnik-Zamolodchikov equations associated to integrable vertex models with super algebra and Hecke algebra symmetries. The scheme relies on decomposing the underlying spin representation of the affine Hecke algebra in principal series modules and invoking the known solution of the connection problem for quantum affine Knizhnik-Zamolodchikov equations associated to principal series modules. We apply the method to the spin representation underlying the $\\mathcal{U}_q\\bigl(\\widehat{\\mathfrak{gl}}(2|1)\\bigr)$ Perk-Schultz model. We show that the corresponding connection matrices are described by an elliptic solution of a supersymmetric version of the dynamical quantum Yang-Baxter equation with spectral parameter.

  15. Coarsening dynamics of binary liquids with active rotation

    E-Print Network [OSTI]

    Syeda Sabrina; Matthew Spellings; Sharon C. Glotzer; Kyle J. M. Bishop

    2015-07-24

    Active matter comprised of many self-driven units can exhibit emergent collective behaviors such as pattern formation and phase separation in both biologica and synthetic systems. While these behaviors are increasingly well understood for ensembles of linearly self-propelled particles, less is known about the collective behaviors of active rotating particles where energy input at the particle level gives rise to rotational particle motion. A recent simulation study revealed that active rotation can induce phase separation in mixtures of counter-rotating particles in 2D. In contrast to that of linearly self-propelled particles, the phase separation of counter-rotating fluids is accompanied by steady convective flows that originate at the fluid-fluid interface. Here, we investigate the influence of these flows on the coarsening dynamics of actively rotating binary liquids using a phenomenological, hydrodynamic model that combines a Cahn-Hilliard equation for the fluid composition with a Navier-Stokes equation for the fluid velocity. The effect of active rotation is introduced though an additional force within the Navier-Stokes equations that arises due to gradients in the concentrations of clockwise and counter-clockwise rotating particles. Depending on the strength of active rotation and that of frictional interactions with the stationary surroundings, we observe and explain new dynamical behaviors such as "active coarsening" via self-generated flows as well as the emergence of self-propelled vortex doublets. We confirm that many of the qualitative behaviors identified by the continuum model can also be found in discrete, particle-based simulations of actively rotating liquids. Our results highlight further opportunities for achieving complex dissipative structures in active materials subject to distributed actuation.

  16. Modeling Warm Dense Matter Experiments using the 3D ALE-AMR Code and the Move Toward Exascale Computing

    SciTech Connect (OSTI)

    Koniges, A; Eder, E; Liu, W; Barnard, J; Friedman, A; Logan, G; Fisher, A; Masers, N; Bertozzi, A

    2011-11-04

    The Neutralized Drift Compression Experiment II (NDCX II) is an induction accelerator planned for initial commissioning in 2012. The final design calls for a 3 MeV, Li+ ion beam, delivered in a bunch with characteristic pulse duration of 1 ns, and transverse dimension of order 1 mm. The NDCX II will be used in studies of material in the warm dense matter (WDM) regime, and ion beam/hydrodynamic coupling experiments relevant to heavy ion based inertial fusion energy. We discuss recent efforts to adapt the 3D ALE-AMR code to model WDM experiments on NDCX II. The code, which combines Arbitrary Lagrangian Eulerian (ALE) hydrodynamics with Adaptive Mesh Refinement (AMR), has physics models that include ion deposition, radiation hydrodynamics, thermal diffusion, anisotropic material strength with material time history, and advanced models for fragmentation. Experiments at NDCX-II will explore the process of bubble and droplet formation (two-phase expansion) of superheated metal solids using ion beams. Experiments at higher temperatures will explore equation of state and heavy ion fusion beam-to-target energy coupling efficiency. Ion beams allow precise control of local beam energy deposition providing uniform volumetric heating on a timescale shorter than that of hydrodynamic expansion. The ALE-AMR code does not have any export control restrictions and is currently running at the National Energy Research Scientific Computing Center (NERSC) at LBNL and has been shown to scale well to thousands of CPUs. New surface tension models that are being implemented and applied to WDM experiments. Some of the approaches use a diffuse interface surface tension model that is based on the advective Cahn-Hilliard equations, which allows for droplet breakup in divergent velocity fields without the need for imposed perturbations. Other methods require seeding or other methods for droplet breakup. We also briefly discuss the effects of the move to exascale computing and related computational changes on general modeling codes in fusion energy.

  17. SANS study of HC1 extraction by selected neutral organophosphorus compounds in n-octane.

    SciTech Connect (OSTI)

    Chiarizia, R.; Stepinski, D.; Antonio, M. R. (Chemical Sciences and Engineering Division)

    2010-01-01

    The extraction of HCl by tri(2-ethylhexyl) phosphate (TEHP), tri-n-octyl phosphate (TOP), and tri-n-octylphosphine oxide (TOPO) in n-octane was investigated by liquid-liquid distribution of acid and water and small-angle neutron scattering (SANS) measurements. No formation of a heavy organic phase (third phase) was observed with TEHP and TOP under the experimental conditions used, whereas for 0.4 M TOPO the HCl limiting organic concentration (LOC) at 23 C was 0.32 M (with 5.1 M HCl in the equilibrium aqueous phase). For higher HCl concentrations in the aqueous phase, the organic phase splits into a light and a heavy layer. For TEHP and TOP, the SANS results, interpreted using the Baxter model for hard spheres with surface adhesion, indicated the formation of only small reverse micelles with little intermicellar attraction. For TOPO, the scattering signals suggested the formation of much larger and strongly interacting micelles. The critical values of the stickiness parameter, {tau}{sup -1}, and the interaction potential energy, U(r), for the LOC sample in the TOPO system were consistent with the model for third-phase formation previously developed for tri-n-butyl phosphate (TBP). According to this model, organic phase splitting is due to van der Waals interactions between the polar cores of reverse micelles formed by the extractants in the organic phase.

  18. T-system on T-hook: Grassmannian Solution and Twisted Quantum Spectral Curve

    E-Print Network [OSTI]

    Kazakov, Vladimir; Volin, Dmytro

    2015-01-01

    We propose an efficient grassmannian formalism for solution of bi-linear finite-difference Hirota equation (T-system) on T-shaped lattices related to the space of highest weight representations of $gl(K_1,K_2|M)$ superalgebra. The formalism is inspired by the quantum fusion procedure known from the integrable spin chains and is based on exterior forms of Baxter-like Q-functions. We find a few new interesting relations among the exterior forms of Q-functions and reproduce, using our new formalism, the Wronskian determinant solutions of Hirota equations known in the literature. Then we generalize this construction to the twisted Q-functions and demonstrate the subtleties of untwisting procedure on the examples of rational quantum spin chains with twisted boundary conditions. Using these observations, we generalize the recently discovered, in our paper with N. Gromov, AdS/CFT Quantum Spectral Curve for exact planar spectrum of AdS/CFT duality to the case of arbitrary twisting of AdS$_5\\times$S$^5$ string sigma m...

  19. Fermionic expressions for minimal model Virasoro characters

    E-Print Network [OSTI]

    Trevor A. Welsh

    2004-02-04

    Fermionic expressions for all minimal model Virasoro characters $\\chi^{p, p'}_{r, s}$ are stated and proved. Each such expression is a sum of terms of fundamental fermionic form type. In most cases, all these terms are written down using certain trees which are constructed for $s$ and $r$ from the Takahashi lengths and truncated Takahashi lengths associated with the continued fraction of $p'/p$. In the remaining cases, in addition to such terms, the fermionic expression for $\\chi^{p, p'}_{r, s}$ contains a different character $\\chi^{\\hat p, \\hat p'}_{\\hat r,\\hat s}$, and is thus recursive in nature. Bosonic-fermionic $q$-series identities for all characters $\\chi^{p, p'}_{r, s}$ result from equating these fermionic expressions with known bosonic expressions. In the cases for which $p=2r$, $p=3r$, $p'=2s$ or $p'=3s$, Rogers-Ramanujan type identities result from equating these fermionic expressions with known product expressions for $\\chi^{p, p'}_{r, s}$. The fermionic expressions are proved by first obtaining fermionic expressions for the generating functions $\\chi^{p, p'}_{a, b, c}(L)$ of length $L$ Forrester-Baxter paths, using various combinatorial transforms. In the $L\\to\\infty$ limit, the fermionic expressions for $\\chi^{p, p'}_{r, s}$ emerge after mapping between the trees that are constructed for $b$ and $r$ from the Takahashi and truncated Takahashi lengths respectively.

  20. The su(n) WZNW fusion ring as integrable model: a new algorithm to compute fusion coefficients

    E-Print Network [OSTI]

    Christian Korff

    2012-09-17

    This is a proceedings article reviewing a recent combinatorial construction of the su(n) WZNW fusion ring by C. Stroppel and the author. It contains one novel aspect: the explicit derivation of an algorithm for the computation of fusion coefficients different from the Kac-Walton formula. The discussion is presented from the point of view of a vertex model in statistical mechanics whose partition function generates the fusion coefficients. The statistical model can be shown to be integrable by linking its transfer matrix to a particular solution of the Yang-Baxter equation. This transfer matrix can be identified with the generating function of an (infinite) set of polynomials in a noncommutative alphabet: the generators of the local affine plactic algebra. The latter is a generalisation of the plactic algebra occurring in the context of the Robinson-Schensted correspondence. One can define analogues of Schur polynomials in this noncommutative alphabet which become identical to the fusion matrices when represented as endomorphisms over the state space of the integrable model. Crucial is the construction of an eigenbasis, the Bethe vectors, which are the idempotents of the fusion algebra.

  1. Quantum integrable systems. Quantitative methods in biology

    E-Print Network [OSTI]

    Giovanni Feverati

    2011-01-19

    Quantum integrable systems have very strong mathematical properties that allow an exact description of their energetic spectrum. From the Bethe equations, I formulate the Baxter "T-Q" relation, that is the starting point of two complementary approaches based on nonlinear integral equations. The first one is known as thermodynamic Bethe ansatz, the second one as Kl\\"umper-Batchelor-Pearce-Destri- de Vega. I show the steps toward the derivation of the equations for some of the models concerned. I study the infrared and ultraviolet limits and discuss the numerical approach. Higher rank integrals of motion can be obtained, so gaining some control on the eigenvectors. After, I discuss the Hubbard model in relation to the N = 4 supersymmetric gauge theory. The Hubbard model describes hopping electrons on a lattice. In the second part, I present an evolutionary model based on Turing machines. The goal is to describe aspects of the real biological evolution, or Darwinism, by letting evolve populations of algorithms. Particularly, with this model one can study the mutual transformation of coding/non coding parts in a genome or the presence of an error threshold. The assembly of oligomeric proteins is an important phenomenon which interests the majority of proteins in a cell. I participated to the creation of the project "Gemini" which has for purpose the investigation of the structural data of the interfaces of such proteins. The objective is to differentiate the role of amino acids and determine the presence of patterns characterizing certain geometries.

  2. One-point Functions in AdS/dCFT from Matrix Product States

    E-Print Network [OSTI]

    Buhl-Mortensen, Isak; Kristjansen, Charlotte; Zarembo, Konstantin

    2015-01-01

    One-point functions of certain non-protected scalar operators in the defect CFT dual to the D3-D5 probe brane system with k units of world volume flux can be expressed as overlaps between Bethe eigenstates of the Heisenberg spin chain and a matrix product state. We present a closed expression of determinant form for these one-point functions, valid for any value of k. The determinant formula factorizes into the k=2 result times a k-dependent prefactor. Making use of the transfer matrix of the Heisenberg spin chain we recursively relate the matrix product state for higher even and odd k to the matrix product state for k=2 and k=3 respectively. We furthermore find evidence that the matrix product states for k=2 and k=3 are related via a ratio of Baxter's Q-operators. The general k formula has an interesting thermodynamical limit involving a non-trivial scaling of k, which indicates that the match between string and field theory one-point functions found for chiral primaries might be tested for non-protected ope...

  3. Finite-Volume Spectra of the Lee-Yang Model

    E-Print Network [OSTI]

    Zoltan Bajnok; Omar el Deeb; Paul A. Pearce

    2014-12-29

    We consider the non-unitary Lee-Yang minimal model ${\\cal M}(2,5)$ in three different finite geometries: (i) on the interval with integrable boundary conditions labelled by the Kac labels $(r,s)=(1,1),(1,2)$, (ii) on the circle with periodic boundary conditions and (iii) on the periodic circle including an integrable purely transmitting defect. We apply $\\varphi_{1,3}$ integrable perturbations on the boundary and on the defect and describe the flow of the spectrum. Adding a $\\Phi_{1,3}$ integrable perturbation to move off-criticality in the bulk, we determine the finite size spectrum of the massive scattering theory in the three geometries via Thermodynamic Bethe Ansatz (TBA) equations. We derive these integral equations for all excitations by solving, in the continuum scaling limit, the TBA functional equations satisfied by the transfer matrices of the associated $A_{4}$ RSOS lattice model of Forrester and Baxter in Regime III. The excitations are classified in terms of $(m,n)$ systems. The excited state TBA equations agree with the previously conjectured equations in the boundary and periodic cases. In the defect case, new TBA equations confirm previously conjectured transmission factors.

  4. Fundamental Research on Percussion Drilling: Improved rock mechanics analysis, advanced simulation technology, and full-scale laboratory investigations

    SciTech Connect (OSTI)

    Michael S. Bruno

    2005-12-31

    This report summarizes the research efforts on the DOE supported research project Percussion Drilling (DE-FC26-03NT41999), which is to significantly advance the fundamental understandings of the physical mechanisms involved in combined percussion and rotary drilling, and thereby facilitate more efficient and lower cost drilling and exploration of hard-rock reservoirs. The project has been divided into multiple tasks: literature reviews, analytical and numerical modeling, full scale laboratory testing and model validation, and final report delivery. Literature reviews document the history, pros and cons, and rock failure physics of percussion drilling in oil and gas industries. Based on the current understandings, a conceptual drilling model is proposed for modeling efforts. Both analytical and numerical approaches are deployed to investigate drilling processes such as drillbit penetration with compression, rotation and percussion, rock response with stress propagation, damage accumulation and failure, and debris transportation inside the annulus after disintegrated from rock. For rock mechanics modeling, a dynamic numerical tool has been developed to describe rock damage and failure, including rock crushing by compressive bit load, rock fracturing by both shearing and tensile forces, and rock weakening by repetitive compression-tension loading. Besides multiple failure criteria, the tool also includes a damping algorithm to dissipate oscillation energy and a fatigue/damage algorithm to update rock properties during each impact. From the model, Rate of Penetration (ROP) and rock failure history can be estimated. For cuttings transport in annulus, a 3D numerical particle flowing model has been developed with aid of analytical approaches. The tool can simulate cuttings movement at particle scale under laminar or turbulent fluid flow conditions and evaluate the efficiency of cutting removal. To calibrate the modeling efforts, a series of full-scale fluid hammer drilling tests, as well as single impact tests, have been designed and executed. Both Berea sandstone and Mancos shale samples are used. In single impact tests, three impacts are sequentially loaded at the same rock location to investigate rock response to repetitive loadings. The crater depth and width are measured as well as the displacement and force in the rod and the force in the rock. Various pressure differences across the rock-indentor interface (i.e. bore pressure minus pore pressure) are used to investigate the pressure effect on rock penetration. For hammer drilling tests, an industrial fluid hammer is used to drill under both underbalanced and overbalanced conditions. Besides calibrating the modeling tool, the data and cuttings collected from the tests indicate several other important applications. For example, different rock penetrations during single impact tests may reveal why a fluid hammer behaves differently with diverse rock types and under various pressure conditions at the hole bottom. On the other hand, the shape of the cuttings from fluid hammer tests, comparing to those from traditional rotary drilling methods, may help to identify the dominant failure mechanism that percussion drilling relies on. If so, encouraging such a failure mechanism may improve hammer performance. The project is summarized in this report. Instead of compiling the information contained in the previous quarterly or other technical reports, this report focuses on the descriptions of tasks, findings, and conclusions, as well as the efforts on promoting percussion drilling technologies to industries including site visits, presentations, and publications. As a part of the final deliveries, the 3D numerical model for rock mechanics is also attached.

  5. Third phase formation in the extraction of phosphotungstic acid by TBP in n-octane.

    SciTech Connect (OSTI)

    Antonio, M. R.; Chiarizia, R.; Jaffrennou, F. (Chemical Sciences and Engineering Division)

    2010-08-30

    The solvent extraction of 12-phosphotungstic acid, also known as 12-tungstophosphoric acid-H{sub 3}PW{sub 12}O{sub 40}, the so-called Keggin heteropolyacid - by 0.73 M (20%v/v) tri-n-butyl phosphate (TBP) in n-octane under conditions comparable to those used previously for the extraction of conventional inorganic mineral acids is described. A simplified phase diagram for the pentanary system comprised of H{sub 3}PW{sub 12}O{sub 40}, HNO{sub 3}, H{sub 2}O, TBP, and n-octane reveals an extremely low initial concentration of H{sub 3}PW{sub 12}O{sub 40} (1.1 mM) at the LOC (limiting organic concentration) condition, far lower than the most effective third-phase-forming inorganic acid, namely HClO{sub 4}. The results from small-angle neutron scattering (SANS) indicate that the interparticle attraction energy - U(r) calculated through application of the Baxter sticky sphere model to the SANS data at the LOC condition - does not approach the -2 k{sub B} T value associated with phase splitting in previous studies of TBP third-phase formation. The third-phase formation model based on attractive interactions between polar cores of reverse micelles, successfully developed for TBP and other extraction systems does not apply to the extraction of H{sub 3}PW{sub 12}O{sub 40}. Rather, the separation of a third-phase from the TBP organic phase stems from the limited solubility of the heavy and highly polar H{sub 3}PW{sub 12}O{sub 40}-TBP species in the alkane diluent.

  6. Q-operators, Yangian invariance and the quantum inverse scattering method

    E-Print Network [OSTI]

    Rouven Frassek

    2014-12-10

    Inspired by the integrable structures appearing in weakly coupled planar N=4 super Yang-Mills theory, we study Q-operators and Yangian invariants of rational integrable spin chains. We review the quantum inverse scattering method along with the Yang-Baxter equation which is the key relation in this systematic approach to study integrable models. Our main interest concerns rational integrable spin chains and lattice models. We recall the relation among them and how they can be solved using Bethe ansatz methods incorporating so-called Q-functions. In order to remind the reader how the Yangian emerges in this context, an overview of its so-called RTT-realization is provided. The main part is based on the author's original publications. Firstly, we construct Q-operators whose eigenvalues yield the Q-functions for rational homogeneous spin chains. The Q-operators are introduced as traces over certain monodromies of R-operators. Our construction allows us to derive the hierarchy of commuting Q-operators and the functional relations among them. We study how the nearest-neighbor Hamiltonian and in principle also higher local charges can be extracted from the Q-operators directly. Secondly, we formulate the Yangian invariance condition, also studied in relation to scattering amplitudes of N=4 super Yang-Mills theory, in the RTT-realization. We find that Yangian invariants can be interpreted as special eigenvectors of certain inhomogeneous spin chains. This allows us to apply the algebraic Bethe ansatz and derive the corresponding Bethe equations that are relevant to construct the invariants. We examine the connection between the Yangian invariant spin chain eigenstates whose components can be understood as partition functions of certain 2d lattice models and tree-level scattering amplitudes of the four-dimensional gauge theory. Finally, we conclude and discuss some future directions.

  7. Energy Frontier Research Center Center for Materials Science of Nuclear Fuels

    SciTech Connect (OSTI)

    Todd Allen

    2014-04-01

    Scientific Successes • The first phonon density of states (PDOS) measurements for UO2 to include anharmonicity were obtained using time-of-flight inelastic neutron scattering at the Spallation Neutron Source (SNS), and an innovative, experimental-based anharmonic smoothing technique has enabled quantitative benchmarking of ab initio PDOS simulations. • Direct comparison between anharmonicity-smoothed ab initio PDOS simulations for UO2 and experimental measurements has demonstrated the need for improved understanding of UO2 at the level of phonon dispersion, and, further, that advanced lattice dynamics simulations including finite temperatures approaches will be required for handling this strongly correlated nuclear fuel. • PDOS measurements performed on polycrystalline samples have identified the phonon branches and energy ranges most highly impacted by fission-product and hyper-stoichiometry lattice defects in UO2. These measurements have revealed the broad-spectrum impact of oxygen hyper-stoichiometry on thermal transport. The reduction in thermal conductivity caused by hyper-stoichiometry is many times stronger than that caused by substitutional fission-product impurities. • Laser-based thermo-reflectance measurements on UO2 samples irradiated with light (i.e. He) ions to introduce point defects have been coupled with MD simulations and lattice parameter measurements to determine the role of uranium and oxygen point defects in reducing thermal conductivity. • A rigorous perturbation theory treatment of phonon lifetimes in UO2 based on a 3D discretization of the Brillouin zone coupled with experimentally measured phonon dispersion has been implemented that produces improved predictions of the temperature dependent thermal conductivity. • Atom probe investigations of the influence of grain boundary structure on the segregation behavior of Kr in UO2 have shown that smaller amounts of Kr are present at low angle grain boundaries than at large angle grain boundaries due to the more dense dislocation arrays associated with large angle boundaries; this observation has potentially important ramifications for thermal transport in the high burn-up rim region of light water reactor fuel. • A variable charge interatomic potential has been developed that not only provides an accurate representation of the fluorite UO2 phase, it is further capable of describing continuous stoichiometry changes from UO2 to hyper-stoichiometric UO2+x, to U4O9 and U3O7, and possibly to orthorhombic U3O8. This is the first potential that features many-body effects in all possible interactions (U-U, U-O and O-O) combined with the variable charge. • A theoretical proof has been formulated showing that it is necessary to use the so-called model C phase field approach, consisting of Cahn-Hilliard and Allen-Cahn equations, to describe void evolution in irradiated materials. This work resolved a longstanding literature controversy regarding how to model voids at the mesoscale. • A novel cluster dynamics model has been developed for the nucleation of voids and loops in UO2 under irradiation. This model is important in understanding the defect state of UO2 after irradiation and, more importantly, reveals off-stoichiometric states of irradiated UO2 that are critical for understanding the impact of irradiation on thermal transport. Personnel Successes

  8. Sans study of reverse micelles formed upon extraction of inorganic acids by TBP in n-octane.

    SciTech Connect (OSTI)

    Chiarizia, R.; Briand, A.; Jensen, M. P.; Thiyagarajan, P.

    2008-01-01

    Small-angle neutron scattering (SANS) data for n-octane solutions of TBP loaded with progressively larger amounts of HNO{sub 3}, HClO{sub 4}, H{sub 2}SO{sub 4}, and H{sub 3}PO{sub 4} up to and beyond the LOC (limiting organic concentration of acid) condition, were interpreted using the Baxter model for hard spheres with surface adhesion. The coherent picture of the behavior of the TBP solutions derived from the SANS investigation discussed in this paper confirmed our recently developed model for third phase formation. This model analyses the features of the scattering data in the low Q region as arising from van der Waals interactions between the polar cores of reverse micelles. Our SANS data indicated that the TBP micelles swell when acid and water are extracted into their polar core. The swollen micelles have critical diameters ranging from 15 to 22 {angstrom}, and polar core diameters between 10 and 15 {angstrom}, depending on the specific system. At the respective LOC conditions, the TBP weight-average aggregation numbers are -4 for HClO{sub 4}, -6 for H2SO{sub 4}, -7 for HCl, and -10 for H{sub 3}PO{sub 4}. The comparison between the behavior of HNO{sub 3}, a non-third phase forming acid, and the other acids provided an explanation of the effect of the water molecules present in the polar core of the micelles on third phase formation. The thickness of the lipophilic shell of the micelles indicated that the butyl groups of TBP lie at an angle of -25 degrees relative to a plane tangent to the micellar core. The critical energy of intermicellar attraction, U(r), was about -2 k{sub B}T for all the acids investigated. This value is the same as that reported in our previous publications on the extraction of metal nitrates by TBP, confirming that the same mechanism and energetics are operative in the formation of a third phase, independent of whether the chemical species extracted are metal nitrate salts or inorganic acids.

  9. Heat Pump Water Heater Durabliltiy Testing - Phase II

    SciTech Connect (OSTI)

    Baxter, VAND.

    2004-05-29

    Ten heat pump water heaters (HPWH) were placed in an environmentally controlled test facility and run through a durability test program of approximately 7300 duty cycles (actual cycles accumulated ranged from 6640 to 8324 for the ten units). Five of the units were upgraded integral types (HPWH mounted on storage tank, no pump) from the same manufacturer as those tested in our first durability program in 2001 (Baxter and Linkous, 2002). The other five were ''add-on'' type units (HPWH with circulation pump plumbed to a separate storage tank) from another manufacturer. This durability test was designed to represent approximately 7-10 years of normal operation to meet the hot water needs of a residence. The integral units operated without incident apart from two control board failures. Both of these were caused by inadvertent exposure to very hot and humid (>135 F dry bulb and >120 F dew point) conditions that occurred due to a test loop failure. It is not likely that any residential water heater would be installed where such conditions were expected so these failures are not considered a long-term reliability concern. Two of the integral HPWHs featured a condensate management system (CMS) option that effectively eliminated any need for an evaporator condensate drain, but imposed significant efficiency penalties when operating in high humidity ambient conditions. The add-on units experienced no operational failures (breakdowns with loss of hot water production) during the course of the testing. However, their control systems exhibited some performance degradation under the high temperature, high humidity test conditions--HPWHs would shut off with tank water temperatures 15-20 F lower than when operating under moderate ambient conditions. One unit developed a refrigerant leak during the test program and lost about 50% of its charge resulting in reduced efficiency. Efficiency measurements on all the integral units and four of the add-on units showed significantly higher efficiencies than conventional electric water heaters (EWH). DOE Simulated Use Tests conducted prior to starting the durability testing resulted in energy factors (EF) of about 2.3 for the integral design and 1.4 for the add-on design compared to the minimum value of 0.86 prescribed for EWHs. Based on the experience from this and the previous durability testing, there is no evidence that strongly suggests that any of the HPWHs suffered significant performance degradation after undergoing over 7000 water heat cycles.

  10. Initial Business Case Analysis of Two Integrated Heat Pump HVAC Systems for Near-Zero-Energy Homes - Update to Include Evaluation of Impact of Including a Humidifier Option

    SciTech Connect (OSTI)

    Baxter, Van D

    2007-02-01

    The long range strategic goal of the Department of Energy's Building Technologies (DOE/BT) Program is to create, by 2020, technologies and design approaches that enable the construction of net-zero energy homes at low incremental cost (DOE/BT 2005). A net zero energy home (NZEH) is a residential building with greatly reduced needs for energy through efficiency gains, with the balance of energy needs supplied by renewable technologies. While initially focused on new construction, these technologies and design approaches are intended to have application to buildings constructed before 2020 as well resulting in substantial reduction in energy use for all building types and ages. DOE/BT's Emerging Technologies (ET) team is working to support this strategic goal by identifying and developing advanced heating, ventilating, air-conditioning, and water heating (HVAC/WH) technology options applicable to NZEHs. In FY05 ORNL conducted an initial Stage 1 (Applied Research) scoping assessment of HVAC/WH systems options for future NZEHs to help DOE/BT identify and prioritize alternative approaches for further development. Eleven system concepts with central air distribution ducting and nine multi-zone systems were selected and their annual and peak demand performance estimated for five locations: Atlanta (mixed-humid), Houston (hot-humid), Phoenix (hot-dry), San Francisco (marine), and Chicago (cold). Performance was estimated by simulating the systems using the TRNSYS simulation engine (Solar Energy Laboratory et al. 2006) in two 1800-ft{sup 2} houses--a Building America (BA) benchmark house and a prototype NZEH taken from BEopt results at the take-off (or crossover) point (i.e., a house incorporating those design features such that further progress towards ZEH is through the addition of photovoltaic power sources, as determined by current BEopt analyses conducted by NREL). Results were summarized in a project report, HVAC Equipment Design options for Near-Zero-Energy Homes--A Stage 2 Scoping Assessment, ORNL/TM-2005/194 (Baxter 2005). The 2005 study report describes the HVAC options considered, the ranking criteria used, and the system rankings by priority. In 2006, the two top-ranked options from the 2005 study, air-source and ground-source versions of a centrally ducted integrated heat pump (IHP) system, were subjected to an initial business case study. The IHPs were subjected to a more rigorous hourly-based assessment of their performance potential compared to a baseline suite of equipment of legally minimum efficiency that provided the same heating, cooling, water heating, demand dehumidification, and ventilation services as the IHPs. Results were summarized in a project report, Initial Business Case Analysis of Two Integrated Heat Pump HVAC Systems for Near-Zero-Energy Homes, ORNL/TM-2006/130 (Baxter 2006a). The present report is an update to that document which summarizes results of an analysis of the impact of adding a humidifier to the HVAC system to maintain minimum levels of space relative humidity (RH) in winter. The space RH in winter has direct impact on occupant comfort and on control of dust mites, many types of disease bacteria, and 'dry air' electric shocks. Chapter 8 in ASHRAE's 2005 Handbook of Fundamentals (HOF) suggests a 30% lower limit on RH for indoor temperatures in the range of {approx}68-69F based on comfort (ASHRAE 2005). Table 3 in chapter 9 of the same reference suggests a 30-55% RH range for winter as established by a Canadian study of exposure limits for residential indoor environments (EHD 1987). Harriman, et al (2001) note that for RH levels of 35% or higher, electrostatic shocks are minimized and that dust mites cannot live at RH levels below 40%. They also indicate that many disease bacteria life spans are minimized when space RH is held within a 30-60% range. From the foregoing it is reasonable to assume that a winter space RH range of 30-40% would be an acceptable compromise between comfort considerations and limitation of growth rates for dust mites and many bacteria. In addition it reports som

  11. Initial Business Case Analysis of Two Integrated Heat Pump HVAC Systems for Near-Zero-Energy Homes -- Update to Include Analyses of an Economizer Option and Alternative Winter Water Heating Control Option

    SciTech Connect (OSTI)

    Baxter, Van D

    2006-12-01

    The long range strategic goal of the Department of Energy's Building Technologies (DOE/BT) Program is to create, by 2020, technologies and design approaches that enable the construction of net-zero energy homes at low incremental cost (DOE/BT 2005). A net zero energy home (NZEH) is a residential building with greatly reduced needs for energy through efficiency gains, with the balance of energy needs supplied by renewable technologies. While initially focused on new construction, these technologies and design approaches are intended to have application to buildings constructed before 2020 as well resulting in substantial reduction in energy use for all building types and ages. DOE/BT's Emerging Technologies (ET) team is working to support this strategic goal by identifying and developing advanced heating, ventilating, air-conditioning, and water heating (HVAC/WH) technology options applicable to NZEHs. Although the energy efficiency of heating, ventilating, and air-conditioning (HVAC) equipment has increased substantially in recent years, new approaches are needed to continue this trend. Dramatic efficiency improvements are necessary to enable progress toward the NZEH goals, and will require a radical rethinking of opportunities to improve system performance. The large reductions in HVAC energy consumption necessary to support the NZEH goals require a systems-oriented analysis approach that characterizes each element of energy consumption, identifies alternatives, and determines the most cost-effective combination of options. In particular, HVAC equipment must be developed that addresses the range of special needs of NZEH applications in the areas of reduced HVAC and water heating energy use, humidity control, ventilation, uniform comfort, and ease of zoning. In FY05 ORNL conducted an initial Stage 1 (Applied Research) scoping assessment of HVAC/WH systems options for future NZEHs to help DOE/BT identify and prioritize alternative approaches for further development. Eleven system concepts with central air distribution ducting and nine multi-zone systems were selected and their annual and peak demand performance estimated for five locations: Atlanta (mixed-humid), Houston (hot-humid), Phoenix (hot-dry), San Francisco (marine), and Chicago (cold). Performance was estimated by simulating the systems using the TRNSYS simulation engine (Solar Energy Laboratory et al. 2006) in two 1800-ft{sup 2} houses--a Building America (BA) benchmark house and a prototype NZEH taken from BEopt results at the take-off (or crossover) point (i.e., a house incorporating those design features such that further progress towards ZEH is through the addition of photovoltaic power sources, as determined by current BEopt analyses conducted by NREL). Results were summarized in a project report, HVAC Equipment Design options for Near-Zero-Energy Homes--A Stage 2 Scoping Assessment, ORNL/TM-2005/194 (Baxter 2005). The 2005 study report describes the HVAC options considered, the ranking criteria used, and the system rankings by priority. In 2006, the two top-ranked options from the 2005 study, air-source and ground-source versions of an integrated heat pump (IHP) system, were subjected to an initial business case study. The IHPs were subjected to a more rigorous hourly-based assessment of their performance potential compared to a baseline suite of equipment of legally minimum efficiency that provided the same heating, cooling, water heating, demand dehumidification, and ventilation services as the IHPs. Results were summarized in a project report, Initial Business Case Analysis of Two Integrated Heat Pump HVAC Systems for Near-Zero-Energy Homes, ORNL/TM-2006/130 (Baxter 2006). The present report is an update to that document. Its primary purpose is to summarize results of an analysis of the potential of adding an outdoor air economizer operating mode to the IHPs to take advantage of free cooling (using outdoor air to cool the house) whenever possible. In addition it provides some additional detail for an alternative winter water heating/space heating (WH/S

  12. Initial Business Case Analysis of Two Integrated Heat Pump HVAC Systems for Near-Zero-Energy Homes

    SciTech Connect (OSTI)

    Baxter, Van D

    2006-11-01

    The long range strategic goal of the Department of Energy's Building Technologies (DOE/BT) Program is to create, by 2020, technologies and design approaches that enable the construction of net-zero energy homes at low incremental cost (DOE/BT 2005). A net zero energy home (NZEH) is a residential building with greatly reduced needs for energy through efficiency gains, with the balance of energy needs supplied by renewable technologies. While initially focused on new construction, these technologies and design approaches are intended to have application to buildings constructed before 2020 as well resulting in substantial reduction in energy use for all building types and ages. DOE/BT's Emerging Technologies (ET) team is working to support this strategic goal by identifying and developing advanced heating, ventilating, air-conditioning, and water heating (HVAC/WH) technology options applicable to NZEHs. Although the energy efficiency of heating, ventilating, and air-conditioning (HVAC) equipment has increased substantially in recent years, new approaches are needed to continue this trend. Dramatic efficiency improvements are necessary to enable progress toward the NZEH goals, and will require a radical rethinking of opportunities to improve system performance. The large reductions in HVAC energy consumption necessary to support the NZEH goals require a systems-oriented analysis approach that characterizes each element of energy consumption, identifies alternatives, and determines the most cost-effective combination of options. In particular, HVAC equipment must be developed that addresses the range of special needs of NZEH applications in the areas of reduced HVAC and water heating energy use, humidity control, ventilation, uniform comfort, and ease of zoning. In FY05 ORNL conducted an initial Stage 1 (Applied Research) scoping assessment of HVAC/WH systems options for future NZEHs to help DOE/BT identify and prioritize alternative approaches for further development. Eleven system concepts with central air distribution ducting and nine multi-zone systems were selected and their annual and peak demand performance estimated for five locations: Atlanta (mixed-humid), Houston (hot-humid), Phoenix (hot-dry), San Francisco (marine), and Chicago (cold). Performance was estimated by simulating the systems using the TRNSYS simulation engine (Solar Energy Laboratory et al. 2006) in two 1800-ft{sup 2} houses--a Building America (BA) benchmark house and a prototype NZEH taken from BEopt results at the take-off (or crossover) point (i.e., a house incorporating those design features such that further progress towards ZEH is through the addition of photovoltaic power sources, as determined by current BEopt analyses conducted by NREL). Results were summarized in a project report, 'HVAC Equipment Design options for Near-Zero-Energy Homes--A Stage 2 Scoping Assessment,' ORNL/TM-2005/194 (Baxter 2005). The 2005 study report describes the HVAC options considered, the ranking criteria used, and the system rankings by priority. Table 1 summarizes the energy savings potential of the highest scoring options from the 2005 study for all five locations.

  13. Ground-Source Integrated Heat Pump for Near-Zero Energy Houses: Technology Status Report

    SciTech Connect (OSTI)

    Murphy, Richard W; Rice, C Keith; Baxter, Van D; Craddick, William G

    2007-09-01

    The energy service needs of a net-zero-energy house (ZEH) include space heating and cooling, water heating, ventilation, dehumidification, and humidification, depending on the requirements of the specific location. These requirements differ in significant ways from those of current housing. For instance, the most recent DOE buildings energy data (DOE/BED 2007) indicate that on average {approx}43% of residential buildings primary energy use is for space heating and cooling, vs. {approx}12% for water heating (about a 3.6:1 ratio). In contrast, for the particular prototype ZEH structures used in the analyses in this report, that ratio ranges from about 0.3:1 to 1.6:1 depending on location. The high-performance envelope of a ZEH results in much lower space heating and cooling loads relative to current housing and also makes the house sufficiently air-tight to require mechanical ventilation for indoor air quality. These envelope characteristics mean that the space conditioning load will be closer in size to the water heating load, which depends on occupant behavior and thus is not expected to drop by any significant amount because of an improved envelope. In some locations such as the Gulf Coast area, additional dehumidification will almost certainly be required during the shoulder and cooling seasons. In locales with heavy space heating needs, supplemental humidification may be needed because of health concerns or may be desired for improved occupant comfort. The U.S. Department of Energy (DOE) has determined that achieving their ZEH goal will require energy service equipment that can meet these needs while using 50% less energy than current equipment. One promising approach to meeting this requirement is through an integrated heat pump (IHP) - a single system based on heat pumping technology. The energy benefits of an IHP stem from the ability to utilize otherwise wasted energy; for example, heat rejected by the space cooling operation can be used for water heating. With the greater energy savings the cost of the more energy efficient components required for the IHP can be recovered more quickly than if they were applied to individual pieces of equipment to meet each individual energy service need. An IHP can be designed to use either outdoor air or geothermal resources (e.g., ground, ground water, surface water) as the environmental energy source/sink. Based on a scoping study of a wide variety of possible approaches to meeting the energy service needs for a ZEH, DOE selected the IHP concept as the most promising and has supported research directed toward the development of both air- and ground-source versions. This report describes the ground-source IHP (GS-IHP) design and includes the lessons learned and best practices revealed by the research and development (R&D) effort throughout. Salient features of the GS-IHP include a variable-speed rotary compressor incorporating a brushless direct current permanent magnet motor which provides all refrigerant compression, a variable-speed fan for the indoor section, a multiple-speed ground coil circuit pump, and a single-speed pump for water heating operation. Laboratory IHP testing has thus far used R-22 because of the availability of the needed components that use this refrigerant. It is expected that HFC R-410A will be used for any products arising from the IHP concept. Data for a variable-speed compressor that uses R-410A has been incorporated into the DOE/ORNL Mark VI Heat Pump Design Model (HPDM). HPDM was then linked to TRNSYS, a time-series-dependent simulation model capable of determining the energy use of building cooling and heating equipment as applied to a defined house on a sub-hourly basis. This provided a highly flexible design analysis capability for advanced heat pump equipment; however, the program also took a relatively long time to run. This approach was used with the initial prototype design reported in Murphy et al. (2007a) and in the business case analysis of Baxter (2007).