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1

Areas of Molecules in Membranes Consisting of Mixtures Olle Edholm* and John F. Nagley  

E-Print Network [OSTI]

the average area, especially in disordered and fluctuating fluid phases. The thickness of the membrane when bilayers consist of heterogeneous mixtures of lipids and/or proteins. Even with all the detail easily accessible quantities to monitor in an NPT ensemble is the total area A of a bilayer with Nchol

Nagle, John F.

2

A mixture-energy-consistent six-equation two-phase numerical model for fluids with interfaces, cavitation and evaporation waves  

E-Print Network [OSTI]

and nuclear power plants technologies. Cavitating fluids are multiphase mixtures that often involve complex dedicated in the past decades to the simulation of cavitating flows and liquid-vapor flows with phase change fronts, when heat and mass transfer processes are included in the physical description through thermal

Pelanti, Marica

3

Self-consistent particle modeling of radio frequency discharge in Ar/O{sub 2} mixtures: Effects of crossed electric and magnetic fields and partial pressure  

SciTech Connect (OSTI)

A particle-in-cell/Monte Carlo model is developed to study and analyze the electrical characteristics of the nonequilibrium plasma created by radio frequency (RF) discharge in Ar/O{sub 2} mixtures in the presence of crossed electric and magnetic fields. The method of collision treatment is based on an optimized estimation of the free time flight. The needed basic data--more specifically, the ion-neutral cross sections--are determined first. The simulation conditions are 50 mTorr for the total gas pressure and 200 V for the peak of the RF voltage at a frequency of 13.56 MHz. The magnetic field is varied from 0 to 50 G. The effect of the partial pressure ratio of O{sub 2} in the mixture and the effect of the magnitude of the magnetic field are discussed. In particular, the results show an increase of the plasma density that is ten times higher in the presence of a magnetic field.

Benyoucef, Djilali [University of Toulouse, UMR CNRS 5213, Laplace, Toulouse (France); Laboratoire Genie Electrique et Energie Renouvelables, Chlef University (Algeria); Yousfi, Mohammed [University of Toulouse, UMR CNRS 5213, Laplace, Toulouse (France); Belmadani, Bachir [Laboratoire Genie Electrique et Energie Renouvelables, Chlef University (Algeria)

2011-04-15T23:59:59.000Z

4

Consistency Decision  

E-Print Network [OSTI]

The consistency formula for set theory can be stated in terms of the free-variables theory of primitive recursive maps. Free-variable p. r. predicates are decidable by set theory, main result here, built on recursive evaluation of p. r. map codes and soundness of that evaluation in set theoretical frame: internal p. r. map code equality is evaluated into set theoretical equality. So the free-variable consistency predicate of set theory is decided by set theory, {\\omega}-consistency assumed. By G\\"odel's second incompleteness theorem on undecidability of set theory's consistency formula by set theory under assumption of this {\\omega}- consistency, classical set theory turns out to be {\\omega}-inconsistent.

Michael Pfender

2014-05-09T23:59:59.000Z

5

The Electrical Resistance of Binary Metallic Mixtures  

Science Journals Connector (OSTI)

The existing theories of the resistivity of mixtures assume regular arrangements of the two components rather than random mixtures. A theory for a random mixture is given based on the assumption that each crystal acts as if surrounded by a homogeneous medium whose properties are those of the mixture. Comparisons with experiment are made. The experimental data that have been examined fall roughly into two classes. One class consists of mixtures where the variation of resistivity with composition disagrees violently with this theory making it clear that the assumptions made are completely inapplicable. The remaining class consists of mixtures which generally agree well with the theory.

Rolf Landauer

1952-01-01T23:59:59.000Z

6

Mixtures that are consistently long-lasting, constructible,  

E-Print Network [OSTI]

) · Incompatibilities (2) · Freeze-thaw · D-Cracking · Late ettringite formation · Excessive aggregate absorption

7

Systems/Circuits Cortical Pitch Regions in Humans Respond Primarily to  

E-Print Network [OSTI]

Systems/Circuits Cortical Pitch Regions in Humans Respond Primarily to Resolved Harmonics and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 Pitch of pitch perception havedifferentiatedbetweentemporalandspectralcues

Kanwisher, Nancy

8

Consistency, Truth and Ontology  

Science Journals Connector (OSTI)

After a brief survey of the different meanings of consistency, the study is restricted to consistency understood as non-contradiction of sets of sentences. The philosophical reasons for this requirement are discu...

Evandro Agazzi

2011-02-01T23:59:59.000Z

9

EXPENDITURE OBJECT CODES Foundation FOUNDATION EXPENDITURE OBJECT CODES are used primarily by Accounting Services for Foundation  

E-Print Network [OSTI]

EXPENDITURE OBJECT CODES ­ Foundation 2-J page 1 FOUNDATION EXPENDITURE OBJECT CODES are used primarily by Accounting Services for Foundation transactions. 3080 Foundation Service Fee: Allocation of administrative costs to Foundation beneficiary departmental accounts. 3120 LSU Magazine Costs - Foundation

Harms, Kyle E.

10

Brain reorganization, not relative brain size, primarily characterizes anthropoid brain evolution  

Science Journals Connector (OSTI)

...reserved. May 22, 2013 research-article Research articles 1001 42 70 133 Brain reorganization, not relative brain size, primarily characterizes anthropoid brain evolution J. B. Smaers 1 2 C. Soligo 1 e-mail: j.smaers@ucl.ac...

2013-01-01T23:59:59.000Z

11

New Study Shows Solar Manufacturing Costs Not Driven Primarily by Labor |  

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

Study Shows Solar Manufacturing Costs Not Driven Primarily by Study Shows Solar Manufacturing Costs Not Driven Primarily by Labor New Study Shows Solar Manufacturing Costs Not Driven Primarily by Labor September 5, 2013 - 12:00pm Addthis Production scale, not lower labor costs, drives China's current advantage in manufacturing photovoltaic (PV) solar energy systems, according to a new report released today by the Energy Department's National Renewable Energy Laboratory (NREL) and the Massachusetts Institute of Technology (MIT). Although the prevailing belief is that low labor costs and direct government subsidies for PV manufacturing in China account for that country's dominance in PV manufacturing, the NREL/MIT study shows that a majority of the region's competitive advantage comes from production scale-enabled, in part, through preferred access to capital (indirect

12

New Study Shows Solar Manufacturing Costs Not Driven Primarily by Labor |  

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

New Study Shows Solar Manufacturing Costs Not Driven Primarily by New Study Shows Solar Manufacturing Costs Not Driven Primarily by Labor New Study Shows Solar Manufacturing Costs Not Driven Primarily by Labor September 5, 2013 - 12:00pm Addthis Production scale, not lower labor costs, drives China's current advantage in manufacturing photovoltaic (PV) solar energy systems, according to a new report released today by the Energy Department's National Renewable Energy Laboratory (NREL) and the Massachusetts Institute of Technology (MIT). Although the prevailing belief is that low labor costs and direct government subsidies for PV manufacturing in China account for that country's dominance in PV manufacturing, the NREL/MIT study shows that a majority of the region's competitive advantage comes from production scale-enabled, in part, through preferred access to capital (indirect

13

Fluid Mixtures of Parallel Hard Cubes  

Science Journals Connector (OSTI)

The direct correlation function of a fluid mixture of parallel hard cubes is obtained by using Rosenfeld's fundamental measure approximation. This approximation is thermodynamically consistent (compressibility and virial equations of state are equal) and predicts a spinodal instability of the binary mixture for large-to-small side ratio larger than roughly 10, in qualitative agreement with simulations on the lattice version of the model. In two dimensions the system never demixes, also in agreement with the simulations.

Jos A. Cuesta

1996-05-13T23:59:59.000Z

14

Tell: Building a consistent,  

E-Print Network [OSTI]

, Joseph M. Hellerstein, William R. Marczak UC Berkeley November 19, 2010 #12;Show and Tell: BuildingShow and Tell: Building a consistent, replicated shopping cart in Bloom Peter Alvaro, Neil Conway, Joseph M. Hellerstein, William R. Marczak Background The CALM Conjecture Introducing Bloom Writing

California at Irvine, University of

15

Consistent Quantum Reasoning  

E-Print Network [OSTI]

Precise rules are developed in order to formalize the reasoning processes involved in standard non-relativistic quantum mechanics, with the help of analogies from classical physics. A classical or quantum description of a mechanical system involves a {\\it framework}, often chosen implicitly, and a {\\it statement} or assertion about the system which is either true or false within the framework with which it is associated. Quantum descriptions are no less ``objective'' than their classical counterparts, but differ from the latter in the following respects: (i) The framework employs a Hilbert space rather than a classical phase space. (ii) The rules for constructing meaningful statements require that the associated projectors commute with each other and, in the case of time-dependent quantum histories, that consistency conditions be satisfied. (iii) There are incompatible frameworks which cannot be combined, either in constructing descriptions or in making logical inferences about them, even though any one of these frameworks may be used separately for describing a particular physical system. A new type of ``generalized history'' is introduced which extends previous proposals by Omn\\`es, and Gell-Mann and Hartle, and a corresponding consistency condition which does not involve density matrices or single out a direction of time. Applications which illustrate the formalism include: measurements of spin, two-slit diffraction, and the emergence of the classical world from a fully quantum description.

Robert B. Griffiths

1995-05-17T23:59:59.000Z

16

Radio-frequency induction plasmas at atmospheric pressure: Mixtures of hydrogen, nitrogen, and oxygen with argon  

Science Journals Connector (OSTI)

Numerical calculations are reported which simulate atmospheric-pressure radiofrequency induction plasmas consisting of either pure argon or mixtures of argon with hydrogen, nitrogen, or oxygen. These calculati...

S. L. Girshick; W. Yu

1990-12-01T23:59:59.000Z

17

ON CONSISTENCY OF BAYES PROCEDURES  

Science Journals Connector (OSTI)

ON CONSISTENCY OF BAYES PROCEDURES Loraine Schwartz DEPARTMENT OF MATHEMATICS, UNIVERSITY OF BRITISH COLUMBIA...COLUMBIA. | Journal Article ON CONSISTENCY OF BAYES PROCEDURES BY LORAINE SCHWARTZ DEPARTMENT OF MATHEMATICS, UNIVERSITY OF BRITISH COLUMBIA...

Loraine Schwartz

1964-01-01T23:59:59.000Z

18

14 The College will remain primarily a residential university, offering research-led education in science, engineering, medicine and busi-  

E-Print Network [OSTI]

14 The College will remain primarily a residential university, offering research-led education at the College. · To provide a research-led education of the highest international quality within and practical experience Research-led education Intellectualand professionaldevelopment UG PGT PGR Imperial

19

Embedded Electronic Nose for VOC Mixture Analysis  

SciTech Connect (OSTI)

This paper details the work done towards a low cost, small size, portable embedded electronic nose (e-nose) and its application for analysis of different VOC mixtures. The sensor array is composed of commercially available metal oxide semiconductor sensors by Figaro. The embedded E-nose consists of an ADuC831 and has an RS 232 interface for Desktop PC for higher level data collection and NN training. The ESP tool with database facility and multilayer perceptron neural network (MLP NN) is employed to interface the embedded hardware and to process the electronic nose signals before being classified. The use of embedded e-nose for the quantification of VOCs in mixtures is investigated.

Botre, B.; Gharpure, D.; Shaligram, A. [Department of Electronic Science, University of Pune, Pune: 411007 (India)

2009-05-23T23:59:59.000Z

20

Prognostic Cell Biological Markers in Cervical Cancer Patients Primarily Treated With (Chemo)radiation: A Systematic Review  

SciTech Connect (OSTI)

The aim of this study was to systematically review the prognostic and predictive significance of cell biological markers in cervical cancer patients primarily treated with (chemo)radiation. A PubMed, Embase, and Cochrane literature search was performed. Studies describing a relation between a cell biological marker and survival in {>=}50 cervical cancer patients primarily treated with (chemo)radiation were selected. Study quality was assessed, and studies with a quality score of 4 or lower were excluded. Cell biological markers were clustered on biological function, and the prognostic and predictive significance of these markers was described. In total, 42 studies concerning 82 cell biological markers were included in this systematic review. In addition to cyclooxygenase-2 (COX-2) and serum squamous cell carcinoma antigen (SCC-ag) levels, markers associated with poor prognosis were involved in epidermal growth factor receptor (EGFR) signaling (EGFR and C-erbB-2) and in angiogenesis and hypoxia (carbonic anhydrase 9 and hypoxia-inducible factor-1{alpha}). Epidermal growth factor receptor and C-erbB-2 were also associated with poor response to (chemo)radiation. In conclusion, EGFR signaling is associated with poor prognosis and response to therapy in cervical cancer patients primarily treated with (chemo)radiation, whereas markers involved in angiogenesis and hypoxia, COX-2, and serum SCC-ag levels are associated with a poor prognosis. Therefore, targeting these pathways in combination with chemoradiation may improve survival in advanced-stage cervical cancer patients.

Noordhuis, Maartje G.; Eijsink, Jasper J.H.; Roossink, Frank; Graeff, Pauline de [Department of Gynecologic Oncology, University Medical Center Groningen, University of Groningen, Groningen (Netherlands); Pras, Elisabeth [Department of Radiation Oncology, University Medical Center Groningen, University of Groningen, Groningen (Netherlands); Schuuring, Ed [Department of Pathology, University Medical Center Groningen, University of Groningen, Groningen (Netherlands); Wisman, G. Bea A. [Department of Gynecologic Oncology, University Medical Center Groningen, University of Groningen, Groningen (Netherlands); Bock, Geertruida H. de [Department of Epidemiology, University Medical Center Groningen, University of Groningen, Groningen (Netherlands); Zee, Ate G.J. van der, E-mail: a.g.j.van.der.zee@og.umcg.n [Department of Gynecologic Oncology, University Medical Center Groningen, University of Groningen, Groningen (Netherlands)

2011-02-01T23:59:59.000Z

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


21

Sound Propagation in Gross Mixtures  

Science Journals Connector (OSTI)

For low acoustic frequencies a mixture (a porous medium or a suspension) is shown to have an effective density which differs slightly from the density given by Archimedes' principle. This effective density is computed from a physically elementary consideration of viscous incompressible fluid flow. For higher frequencies pore or particle size in the mixture becomes comparable with the wavelength of shear waves in the fluid while still small compared with dilatational wavelength. The theory is extended to such frequencies through the known formula for the fluid's resistance to the oscillations of a rigid sphere. In both cases the effective compressibility of the mixture is taken to be the volume?average of the component compressibilities. From the effective density and compressibility the acoustic properties of the mixture are predicted. Predictions are compared with previous theories and with experimental results.

W. S. Ament

1953-01-01T23:59:59.000Z

22

Catalytic ignition of fuel/oxygen/nitrogen mixtures over platinum  

SciTech Connect (OSTI)

Ignition of fuel/oxygen/nitrogen mixtures over platinum wire is experimentally studied by using microcalorimetry and by restricting the flow to the low Reynolds number range so that axisymmetry prevails. The fuels studied are propane, butane, propylene, ethylene, carbon monoxide, and hydrogen. Parameters investigated include flow velocity, fuel type and concentration, and oxygen concentration. The catalytic ignition temperatures of the various fuels are accurately determined over extensive ranges of fuel/oxygen/nitrogen concentrations. Results show two distinctly opposite ignition trends depending on the nature of the fuel. That is, the ignition temperature of lean propane/air and butane/air mixtures decreases as their fuel concentration is increased, while the reverse trend is observed for lean mixtures of propylene, ethylene, carbon monoxide, and hydrogen with air. Furthermore, the ignition of propane depends primarily on fuel concentration, while the ignition of carbon monoxide depends on fuel and oxygen concentrations to a comparable extent. These results are explained on the basis of hierarchical surface adsorption strengths of the different reactants in effecting catalytic ignition. Additional phenomena of interest are observed and discussed.

Cho, P.; Law, C.K.

1986-11-01T23:59:59.000Z

23

Heat and Gravitation. III. Mixtures  

E-Print Network [OSTI]

The standard treatment of relativistic thermodynamics does not allow for a systematic treatment of mixtures. It is proposed that a formulation of thermodynamics as an action principle may be a suitable approach to adopt for a new investigation. This third paper of the series applies the action principle to a study of mixtures of ideal gases. The action for a mixture of ideal gases is the sum of the actions for the components, with an entropy that, in the absence of gravity, is determined by the Gibbs-Dalton hypothesis. Chemical reactions such as hydrogen dissociation are studied, with results that include the Saha equation and that are more complete than traditional treatments, especially so when gravitational effects are included. A mixture of two ideal gases is a system with two degrees of freedom and consequently it exhibits two kinds of sound. In the presence of gravity the Gibbs-Dalton hypothesis is modified to get results that agree with observation. The possibility of a parallel treatment of real gases is illustrated by an application to van der Waals gases. The overall conclusion is that experimental results serve to pin down the lagrangian in a very efficient manner. This leads to a convenient theoretical framework in which many dynamical problems can be studied.

Christian Fronsdal

2010-01-14T23:59:59.000Z

24

Membrane Separations of Liquid Mixtures  

E-Print Network [OSTI]

MEMBRANE SEPARATIONS OF LIQUID MIXTURES Douglas R. Lloyd Separations Research Program Department of Chemical Engineering The University of Texas at Austin Austin, Texas In recent years considerable attention has been given to the need... for reduced energy costs in the chemical processing industry. A major portion of the energy consumed in this industry is associated with the separation and recovery of chemicals. Membrane processes offer energy-efficient, cost effective methods...

Lloyd, D. R.

25

Classical O(N) nonlinear sigma model on the half line: a study on consistent Hamiltonian description  

E-Print Network [OSTI]

The problem of consistent Hamiltonian structure for O(N) nonlinear sigma model in the presence of five different types of boundary conditions is considered in detail. For the case of Neumann, Dirichlet and the mixture of these two types of boundaries, the consistent Poisson brackets are constructed explicitly, which may be used, e.g. for the construction of current algebras in the presence of boundary. While for the mixed boundary conditions and the mixture of mixed and Dirichlet boundary conditions, we prove that there is no consistent Poisson brackets, showing that the mixed boundary conditions are incompatible with all nontrivial subgroups of $O((N)$.

He, W; He, Wenli; Zhao, Liu

2003-01-01T23:59:59.000Z

26

Self-consistent chemical model of partially ionized plasmas  

Science Journals Connector (OSTI)

A simple renormalization theory of plasma particle interactions is proposed. It primarily stems from generic properties of equilibrium distribution functions and allows one to obtain the so-called generalized Poisson-Boltzmann equation for an effective interaction potential of two chosen particles in the presence of a third one. The same equation is then strictly derived from the Bogolyubov-Born-Green-Kirkwood-Yvon (BBGKY) hierarchy for equilibrium distribution functions in the pair correlation approximation. This enables one to construct a self-consistent chemical model of partially ionized plasmas, correctly accounting for the close interrelation of charged and neutral components thereof. Minimization of the system free energy provides ionization equilibrium and, thus, permits one to study the plasma composition in a wide range of its parameters. Unlike standard chemical models, the proposed one allows one to study the system correlation functions and thereby to obtain an equation of state which agrees well with exact results of quantum-mechanical activity expansions. It is shown that the plasma and neutral components are strongly interrelated, which results in the short-range order formation in the corresponding subsystem. The mathematical form of the results obtained enables one to both firmly establish this fact and to determine a characteristic length of the structure formation. Since the cornerstone of the proposed self-consistent chemical model of partially ionized plasmas is an effective pairwise interaction potential, it immediately provides quite an efficient calculation scheme not only for thermodynamical functions but for transport coefficients as well.

Yu. V. Arkhipov, F. B. Baimbetov, and A. E. Davletov

2011-01-21T23:59:59.000Z

27

Evaluating mixture adsorption models using molecular simulation...  

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

aic.14058 Abstract: The design of adsorption-based separation processes using novel adsorbents requires reliable data for the adsorption of fluid mixtures on candidate adsorbents....

28

Terahertz spectroscopy for quantifying refined oil mixtures  

Science Journals Connector (OSTI)

In this paper, the absorption coefficient spectra of samples prepared as mixtures of gasoline and diesel in different proportions are obtained by terahertz time-domain spectroscopy. To...

Li, Yi-nan; Li, Jian; Zeng, Zhou-mo; Li, Jie; Tian, Zhen; Wang, Wei-kui

2012-01-01T23:59:59.000Z

29

Lattice Boltzmann model for binary mixtures  

Science Journals Connector (OSTI)

An a priori derivation of the lattice Boltzmann equations for binary mixtures is provided by discretizing the Boltzmann equations that govern the evolution of binary mixtures. The present model leads to a set of two-fluid hydrodynamic equations for the mixture. In existing models, employing the single-relaxation-time approximation, the viscosity and diffusion coefficients are coupled through the relaxation parameter ?, thus limited to unity Prandtl number and Schmidt number. In the present model the viscosity and diffusion coefficient are independently controlled by two relaxation parameters, thus enabling the modeling of mixtures with an arbitrary Schmidt number. The theoretical framework developed here can be readily applied to multiple-species mixing.

Li-Shi Luo and Sharath S. Girimaji

2002-09-27T23:59:59.000Z

30

For decades, traffic safety improvements have relied primarily upon engineering and enforcement solutions. If we are limited to those options, further  

E-Print Network [OSTI]

Traffic Safety Culture For decades, traffic safety improvements have relied primarily upon about driving ­ changing our traffic safety culture. A survey by the Center for Transportation Safety on the roads than drivers nationwide, as measured in the 2010 Traffic Safety Culture Index published by the AAA

31

Resistance of Bacillus subtilis Spore DNA to Lethal Ionizing Radiation Damage Relies Primarily on Spore Core Components and DNA Repair, with Minor Effects of Oxygen Radical Detoxification  

Science Journals Connector (OSTI)

...Spore DNA to Lethal Ionizing Radiation Damage Relies Primarily on...Institute of Aerospace Medicine, Radiation Biology Department, Cologne...Radiological Sciences, Chiba-shi, Japan c University of Florida, Proton...different types of ionizing radiation including X rays, protons...

Ralf Moeller; Marina Raguse; Gnther Reitz; Ryuichi Okayasu; Zuofeng Li; Stuart Klein; Peter Setlow; Wayne L. Nicholson

2013-10-11T23:59:59.000Z

32

Asterix is a reflectometer/diffractometer/grazing-incidence-SANS/SESAME-enabled-SANS spectrometer that is primarily used for experiments or neutron scattering  

E-Print Network [OSTI]

that is primarily used for experiments or neutron scattering techniques requiring polarized neutron beams detector arm is readily configurable for polarization or energy analysis of the scattered neutron beam be translated in the horizontal and vertical directions. Neutron detector (Spin Echo Scattering Angle

33

Biocharis a relatively new concept that has been promoted primarily as a form of carbon storage but also for its poten-  

E-Print Network [OSTI]

allows long-term (multi-centennial) soil carbon storage, with potential benefits for agriculturalBiocharis a relatively new concept that has been promoted primarily as a form of carbon storage to the waste-processing industry in allowing the recovery of waste as a potentially useful by-product [10

34

UCLA PHYSICAL CHEMISTRY CONCENTRATION 2012-2013 CHEMISTRY MAJOR (B.S.), PHYSICAL CHEMISTRY CONCENTRATION: This concentration is designed primarily for  

E-Print Network [OSTI]

UCLA PHYSICAL CHEMISTRY CONCENTRATION 2012-2013 CHEMISTRY MAJOR (B.S.), PHYSICAL CHEMISTRY CONCENTRATION: This concentration is designed primarily for Chemistry majors who are interested in attending graduate school in Physical Chemistry/Physics or related areas. It may also satisfy some of the needs

Levine, Alex J.

35

UCLA CHEMISTRY MAJOR 2012-2013 CHEMISTRY MAJOR (B.S.): This major is designed primarily for students who are interested in attending  

E-Print Network [OSTI]

UCLA CHEMISTRY MAJOR 2012-2013 CHEMISTRY MAJOR (B.S.): This major is designed primarily for students who are interested in attending graduate school in Chemistry or related areas. It also satisfies this major and others offered in the Department of Chemistry and Biochemistry, consult the Undergraduate

Levine, Alex J.

36

Bose-Fermi Mixtures in One Dimension  

Science Journals Connector (OSTI)

We analyze the phase stability and the response of a mixture of bosons and spin-polarized fermions in one dimension (1D). Unlike in 3D, phase separation happens for low fermion densities. The dynamics of the mixture at low energy is independent of the spin-statistics of the components, and the modes are essentially undamped.

Kunal K. Das

2003-05-01T23:59:59.000Z

37

Gas mixtures for spark gap closing switches  

DOE Patents [OSTI]

Gas mixtures for use in spark gap closing switches comprised of fluorocarbons and low molecular weight, inert buffer gases. To this can be added a third gas having a low ionization potential relative to the buffer gas. The gas mixtures presented possess properties that optimized the efficiency spark gap closing switches. 6 figs.

Christophorou, L.G.; McCorkle, D.L.; Hunter, S.R.

1987-02-20T23:59:59.000Z

38

Mesoscopic theory for inhomogeneous mixtures  

E-Print Network [OSTI]

Mesoscopic density functional theory for inhomogeneous mixtures of sperical particles is developed in terms of mesoscopic volume fractions by a systematic coarse-graining procedure starting form microscopic theory. Approximate expressions for the correlation functions and for the grand potential are obtained for weak ordering on mesoscopic length scales. Stability analysis of the disordered phase is performed in mean-field approximation (MF) and beyond. MF shows existence of either a spinodal or a $\\lambda$-surface on the volume-fractions - temperature phase diagram. Separation into homogeneous phases or formation of inhomogeneous distribution of particles occurs on the low-temperature side of the former or the latter surface respectively, depending on both the interaction potentials and the size ratios between particles of different species. Beyond MF the spinodal surface is shifted, and the instability at the $\\lambda$-surface is suppressed by fluctuations. We interpret the $\\lambda$-surface as a borderline between homogeneous and inhomogeneous (containing clusters or other aggregates) structure of the disordered phase. For two-component systems explicit expressions for the MF spinodal and $\\lambda$-surfaces are derived. Examples of interaction potentials of simple form are analyzed in some detail, in order to identify conditions leading to inhomogeneous structures.

A. Ciach

2010-10-22T23:59:59.000Z

39

Equilibrium adsorption of multicomponent gas mixtures at elevated pressures  

SciTech Connect (OSTI)

Equilibrium adsorption of H/sub 2/, CO, CH/sub 4/, CO/sub 2/, and H/sub 2/S (single and mixed gases-two to five species) was measured on activated carbon at pressures up to 400 psia. Temperature-dependent parameters, regressed from single-gas data, were applied to four theoretical models which predict adsorption from gas mixtures. Deviations between theory (IAS) and experiment increased with pressure and with the number of components in the mixture. None of the theories employing only single-gas data could consistently predict multicomponent adsorption. It was found that multicomponent adsorption could be predicted from the extended Langmuir equation by including an interaction parameter calculated from only single and binary data. In the application of mixture adsorption theories, it was shown that from the same model significantly different results can be obtained depending on the selection of the independent set, /T, P, X/sub i// or /T, P, Y/sub i//.

Ritter, J.A.; Yang, R.T.

1987-08-01T23:59:59.000Z

40

A Generalization of Generalized Arc Consistency  

E-Print Network [OSTI]

- binary classic constraint satisfaction problems (CSPs). Based on the Semiring CSP and Valued CSP such as fuzzy CSP, probabilistic CSP, max CSP, and weighted CSP. This extension is based on an idempotent satisfaction problem (CSP), local consistency can be char- acterized as deriving new constraints based on local

Mackworth, Alan K.

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


41

Lightweight consistency analysis of dataflow process networks  

Science Journals Connector (OSTI)

Process networks are a popular modelling technique for distributed computing and signal processing applications. The ability to support various parallelism or communication patterns also makes them suitable for modelling multiprocessor architectures. ... Keywords: component-based systems, consistency analysis, dataflow process networks

Yan Jin; Robert Esser; Charles Lakos

2003-02-01T23:59:59.000Z

42

In vitro - in vivo correlations for endocrine activity of a mixture of currently used pesticides  

SciTech Connect (OSTI)

Two pesticide mixtures were investigated for potential endocrine activity. Mix 3 consisted of bitertanol, propiconazole, and cypermethrin, and Mix 5 included malathion and terbuthylazine in addition to the three pesticides in Mix 3. All five single pesticides and the two mixtures were investigated for their ability to affect steroidogenesis in vitro in H295R cells. The pesticides alone and both mixtures affected steroidogenesis with both mixtures causing increase in progesterone and decrease in testosterone. For Mix 5 an increase in estradiol was seen as well, indicating increased aromatase activity. The two mixtures were also investigated in pregnant rats dosed from gestational day 7 to 21, followed by examination of dams and fetuses. Decreased estradiol and reduced placental testosterone were seen in dams exposed to Mix 5. Also a significant increase in aromatase mRNA-levels in female adrenal glands was found for Mix5. However, either of the two mixtures showed any effects on fetal hormone levels in plasma or testis, or on anogenital distance. Overall, potential aromatase induction was found for Mix 5 both in vitro and in vivo, but not for Mix 3, an effect likely owed to terbuthylazine in Mix 5. However, the hormonal responses in vitro were only partly reflected in vivo, probably due to some toxicokinetic issues, as the pesticide levels in the amniotic fluid also were found to be negatively affected by the number of compounds present in the mixtures. Nonetheless, the H295R assay gives hints on conceivable interference with steroidogenesis, thus generating hypotheses on in vivo effects. - Highlights: The study examines the endocrine disrupting potential of mixtures of pesticides. All single pesticides and both mixtures affected steroidogenesis in vitro. Potential aromatase induction was found for Mix 5 both in vitro and in vivo. The hormonal responses in vitro were only partly reflected in vivo.

Taxvig, Camilla, E-mail: camta@food.dtu.dk [Division of Toxicology and Risk Assessment, National Food Institute, Technical University of Denmark, Mrkhj Bygade 19, DK-2860 Sborg (Denmark); Hadrup, Niels; Boberg, Julie; Axelstad, Marta [Division of Toxicology and Risk Assessment, National Food Institute, Technical University of Denmark, Mrkhj Bygade 19, DK-2860 Sborg (Denmark); Bossi, Rossana [Department of Environmental Science, Aarhus University, DK-4000 Roskilde (Denmark); Bonefeld-Jrgensen, Eva Cecilie [Department of Public Health, University of Aarhus, DK-8000 Aarhus C (Denmark); Vinggaard, Anne Marie [Division of Toxicology and Risk Assessment, National Food Institute, Technical University of Denmark, Mrkhj Bygade 19, DK-2860 Sborg (Denmark)

2013-11-01T23:59:59.000Z

43

Application of Finite Mixture Models for Vehicle Crash Data Analysis  

E-Print Network [OSTI]

heterogeneity through the use of finite mixture regression models. A Finite mixture of Poisson or NB regression models is especially useful when the count data were generated from a heterogeneous population. To evaluate these models, Poisson and NB mixture...

Park, Byung Jung

2010-07-14T23:59:59.000Z

44

Environmental toxicity of complex chemical mixtures  

E-Print Network [OSTI]

and wildlife tissues were collected from four National Priority List Superfund sites within the United States. In general, chemical analysis was not always predictive of mixture toxicity. Although biodegradation reduced the concentration of total...

Gillespie, Annika Margaret

2009-05-15T23:59:59.000Z

45

Binary mixture flammability characteristics for hazard assessment  

E-Print Network [OSTI]

calculations and UNIFAC, a theoretical model that does not require experimental binary interaction parameters, are employed in the mixture flash point predictions, which are validated with experimental data. MFPB is successfully predicted using the UNIFAC model...

Vidal Vazquez, Migvia del C.

2005-11-01T23:59:59.000Z

46

PVT measurements for five natural gas mixtures  

E-Print Network [OSTI]

PVT MEASUREMENTS FOR FIVE NATURAL GAS MIXTURES A Thesis by PHILIP PARAYIL SIMON Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August 1991..., The Netherlands), Ruhrgas (Germany), National Institute of Standards and Technology (Boulder, Colorado, USA), and Texas A&M University (USA). This work involved the measurement of the compressibility factors of the five natural gas mixtures at temperatures...

Simon, Philip Parayil

2012-06-07T23:59:59.000Z

47

Mixed-mode diesel HCCI with External Mixture Formation: Preliminary...  

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

Mixed-mode diesel HCCI with External Mixture Formation: Preliminary Results Mixed-mode diesel HCCI with External Mixture Formation: Preliminary Results 2003 DEER Conference...

48

Rank Reduction for the Local Consistency Problem  

E-Print Network [OSTI]

We address the problem of how simple a solution can be for a given quantum local consistency instance. More specifically, we investigate how small the rank of the global density operator can be if the local constraints are known to be compatible. We prove that any compatible local density operators can be satisfied by a low rank global density operator. Then we study both fermionic and bosonic versions of the N-representability problem as applications. After applying the channel-state duality, we prove that any compatible local channels can be obtained through a global quantum channel with small Kraus rank.

Jianxin Chen; Zhengfeng Ji; Alexander Klyachko; David W. Kribs; Bei Zeng

2012-02-09T23:59:59.000Z

49

Self-consistent generator coordinate method  

Science Journals Connector (OSTI)

An optimum continuous representation technique derived in analogy with the self-consistent harmonic approximation in quantum lattice dynamics is discussed and applied to Lipkin's model. The method is based on the variational principle and corresponds to an infinite summation of an expansion of the appropriate Hamiltonian kernel. The overlap kernel is treated exactly. The actual results indicate the removal of the drawbacks of low order perturbation theory previously employed in this connection.NUCLEAR STRUCTURE Continuous representation method applied to a solvable model.

Bernard Laskowski and Erkki Brndas

1976-04-01T23:59:59.000Z

50

Chemically Consistent Evolutionary Models with Dust  

E-Print Network [OSTI]

As a tool to interpret nearby and high redshift galaxy data from optical to K-band we present our chemically consistent spectrophotometric evolutionary synthesis models. These models take into account the increasing initial metallicity of successive stellar generations using recently published metallicity dependent stellar evolutionary tracks, stellar yields and model atmosphere spectra. The influence of the metallicity is analysed. Dust absorption is included on the basis of gas content and abundance as it varies with time and galaxy type. We compare our models with IUE template spectra and are able to predict UV fluxes for different spectral types. Combined with a cosmological model we obtain evolutionary and k-corrections for various galaxy types and show the differences to models using only solar metallicity input physics as a function of redshift, wavelength band and galaxy type.

C. S. Mller; U. Fritze-v. Alvensleben; K. J. Fricke; D. Calzetti

1999-06-21T23:59:59.000Z

51

Self Consistent Models of the Solar Wind  

E-Print Network [OSTI]

The origins of the hot solar corona and the supersonically expanding solar wind are still the subject of much debate. This paper summarizes some of the essential ingredients of realistic and self-consistent models of solar wind acceleration. It also outlines the major issues in the recent debate over what physical processes dominate the mass, momentum, and energy balance in the accelerating wind. A key obstacle in the way of producing realistic simulations of the Sun-heliosphere system is the lack of a physically motivated way of specifying the coronal heating rate. Recent models that assume the energy comes from Alfven waves that are partially reflected, and then dissipated by magnetohydrodynamic turbulence, have been found to reproduce many of the observed features of the solar wind. This paper discusses results from these models, including detailed comparisons with measured plasma properties as a function of solar wind speed. Some suggestions are also given for future work that could answer the many remain...

Cranmer, Steven R

2010-01-01T23:59:59.000Z

52

Reliability and Consistency of Surface Contamination Measurements  

SciTech Connect (OSTI)

Surface contamination evaluation is a tough problem since it is difficult to isolate the radiations emitted by the surface, especially in a highly irradiating atmosphere. In that case the only possibility is to evaluate smearable (removeable) contamination since ex-situ countings are possible. Unfortunately, according to our experience at CEA, these values are not consistent and thus non relevant. In this study, we show, using in-situ Fourier Transform Infra Red spectrometry on contaminated metal samples, that fixed contamination seems to be chemisorbed and removeable contamination seems to be physisorbed. The distribution between fixed and removeable contamination appears to be variable. Chemical equilibria and reversible ion exchange mechanisms are involved and are closely linked to environmental conditions such as humidity and temperature. Measurements of smearable contamination only give an indication of the state of these equilibria between fixed and removeable contamination at the time and in the environmental conditions the measurements were made.

Rouppert, F.; Rivoallan, A.; Largeron, C.

2002-02-26T23:59:59.000Z

53

Strong-Coupling Theory for the Superfluidity of Bose-Fermi Mixtures  

Science Journals Connector (OSTI)

We develop a strong-coupling theory for the superfluidity of fermion pairing phase in a Bose-Fermi mixture. Dynamical screening, self-energy renormalization, and a pairing gap function are included self-consistently within the adiabatic limit (i.e., the phonon velocity is much smaller than the Fermi velocity). An analytical solution for the transition temperature (Tc) is derived within reasonable approximations. Using typical parameters of a K40-Rb87 mixture, we find that the calculated Tc is several times larger than that obtained in the weak coupling theory, and can be up to several percent of the Fermi temperature.

Daw-Wei Wang

2006-04-13T23:59:59.000Z

54

Spatial separation in a thermal mixture of ultracold Yb174 and Rb87 atoms  

Science Journals Connector (OSTI)

We report on the observation of unusually strong interactions in a thermal mixture of ultracold atoms which cause a significant modification of the spatial distribution. A mixture of Rb87 and Yb174 with a temperature of a few ?K is prepared in a hybrid trap consisting of a bichromatic optical potential superimposed on a magnetic trap. For suitable trap parameters and temperatures, a spatial separation of the two species is observed. We infer that the separation is driven by a large interaction strength between Yb174 and Rb87 accompanied by a large three-body recombination rate. Based on this assumption we have developed a diffusion model which reproduces our observations.

F. Baumer; F. Mnchow; A. Grlitz; S. E. Maxwell; P. S. Julienne; E. Tiesinga

2011-04-21T23:59:59.000Z

55

Detailed Kinetic Modeling of Gasoline Surrogate Mixtures  

SciTech Connect (OSTI)

Real fuels are complex mixtures of thousands of hydrocarbon compounds including linear and branched paraffins, naphthenes, olefins and aromatics. It is generally agreed that their behavior can be effectively reproduced by simpler fuel surrogates containing a limited number of components. In this work, a recently revised version of the kinetic model by the authors is used to analyze the combustion behavior of several components relevant to gasoline surrogate formulation. Particular attention is devoted to linear and branched saturated hydrocarbons (PRF mixtures), olefins (1-hexene) and aromatics (toluene). Model predictions for pure components, binary mixtures and multi-component gasoline surrogates are compared with recent experimental information collected in rapid compression machine, shock tube and jet stirred reactors covering a wide range of conditions pertinent to internal combustion engines. Simulation results are discussed focusing attention on the mixing effects of the fuel components.

Mehl, M; Curran, H J; Pitz, W J; Westbrook, C K

2009-03-09T23:59:59.000Z

56

Density functional theory for hard-sphere mixtures: the White-Bear version Mark II  

E-Print Network [OSTI]

In the spirit of the White-Bear version of fundamental measure theory we derive a new density functional for hard-sphere mixtures which is based on a recent mixture extension of the Carnahan-Starling equation of state. In addition to the capability to predict inhomogeneous density distributions very accurately, like the original White-Bear version, the new functional improves upon consistency with an exact scaled-particle theory relation in the case of the pure fluid. We examine consistency in detail within the context of morphological thermodynamics. Interestingly, for the pure fluid the degree of consistency of the new version is not only higher than for the original White-Bear version but also higher than for Rosenfeld's original fundamental measure theory.

Hendrik Hansen-Goos; Roland Roth

2006-07-27T23:59:59.000Z

57

A consistent interface between PIC-simulations  

SciTech Connect (OSTI)

Many applications for PIC-simulations are limited by cpu-time, computer- memory or unphysical noise which is caused at large numbers of timesteps by the movement of particles. Therefore the aim is to divide the calculation area into different smaller parts to reduce the calculation time of each part. This subdivision requires a consistent, physical interface, which handles not only the particle properties but also the electromagnetic fields in the interface plane. Here we present an interface, implemented in a two dimensional (rz-geometry) and a three dimensional (xyz-geometry) PIC-code. The data stored during a two dimensional PIC-simulation can be reused for either another two dimensional or a three dimensional PIC-simulation. The following conditions, which have to be fulfilled at the interface plane, are checked during the simulation: the particle-movement through the plane has to be one-directional and the electromagnetic field of present resonances has to be negligible in the interface plane. We demonstrate the functionality of the interface for different cut-planes, applied to PIC-simulations of high-power tubes.

Becker, U.; Dohlus, M.; Weiland, T. [Technische Hochshule Darmstadt, Fachbereich 18, FG TEMF, Schlossgartenstr. 8, 64289 Darmstadt (Germany); Deutsches Elektronen Synchroton, DESY, Notkestrasse 85, D-22603 Hamburg (Germany); Technische Hochshule Darmstadt, Fachbereich 18, FG TEMF, Schlossgartenstr. 8, 64289 Darmstadt (Germany)

1997-02-01T23:59:59.000Z

58

A consistent interface between PIC-simulations  

SciTech Connect (OSTI)

Many applications for PIC-simulations are limited by cpu-time, computer- memory or unphysical noise which is caused at large numbers of timesteps by the movement of particles. Therefore the aim is to divide the calculation area into different smaller parts to reduce the calculation time of each part. This subdivision requires a consistent, physical interface, which handles not only the particle properties but also the electromagnetic fields in the interface plane. Here we present an interface, implemented in a two dimensional (rz-geometry) and a three dimensional (xyz-geometry) PIC-code. The data stored during a two dimensional PIC-simulation can be reused for either another two dimensional or a three dimensional PIC-simulation. The following conditions, which have to be fulfilled at the interface plane, are checked during the simulation: the particle-movement through the plane has to be one-directional and the electromagnetic field of present resonances has to be negligible in the interface plane. We demonstrate the functionality of the interface for different cut-planes, applied to PIC-simulations of high-power tubes. {copyright} {ital 1997 American Institute of Physics.}

Becker, U. [Technische Hochshule Darmstadt, Fachbereich 18, FG TEMF, Schlossgartenstr. 8, 64289 Darmstadt (Germany); Dohlus, M. [Deutsches Elektronen Synchroton, DESY, Notkestrasse 85, D-22603 Hamburg (Germany); Weiland, T. [Technische Hochshule Darmstadt, Fachbereich 18, FG TEMF, Schlossgartenstr. 8, 64289 Darmstadt (Germany)

1997-02-01T23:59:59.000Z

59

Pu Glass Fabrication and Product Consistency Testing  

SciTech Connect (OSTI)

The DOE/EM plans to conduct the Plutonium Vitrification Project at the Savannah River Site (SRS). An important part of this project is to reduce the attractiveness of the plutonium by fabricating a plutonium glass form and immobilizing the Pu form within the high level waste (HLW) glass prepared in the Defense Waste Processing Facility (DWPF). This requires that a project schedule that is consistent with EM plans for DWPF and cleanup of the SRS be developed. Critical inputs to key decisions in the vitrification project schedule are near-term data that will increase confidence that lanthanide borosilicate (LaBS) glass product is suitable for disposal in the Yucca Mountain Repository. A workshop was held on April 28, 2005 at Bechtel SAIC Company facility in Las Vegas, NV to define the near term data needs. Dissolution rate data and the fate of plutonium oxide and the neutron absorbers during the dissolution process were defined as key data needs. A suite of short-term tests were defined at the workshop to obtain the needed data. The objectives of these short-term tests are to obtain data that can be used to show that the dissolution rate of a LaBS glass is acceptable and to show that the extent of Pu separation from neutron absorbers, as the glass degrades and dissolves, is not likely to lead to criticality concerns. An additional data need was identified regarding the degree of macroscopic cracking that occurs during processing of the Pu glass waste form and subsequent pouring of HLW glass in the DWPF. A final need to evaluate new frit formulations that may increase the durability of the plutonium glass and/or decrease the degree to which neutron absorbers separate from the plutonium during dissolution was identified. This task plan covers testing to support a near term data need regarding glass dissolution performance. Separate task plans will be developed for testing to address the degree of macroscopic cracking and the development of alternative frit formulations. The Product Consistency Test (PCT) was identified as a means to provide some of the near term performance data. The PCT is a static test method in which known masses of crushed glass and demineralized water are reacted for a desired duration [1]. There are two reasons to perform the PCT. The first is that the results are used as a measure of acceptance in the Waste Acceptance Product Specifications Document (WAPS) [2]. The second is the need for long-term static test results that can be used to verify the applicability of the degradation model. Thus, the primary focus will be on the use of the PCT Method B (PCT-B) to study the formation and stability of colloids and to study alteration phases formed on the glass surface. The standard 7-day PCT in demineralized water (PCT-A) will be included to demonstrate compliance with the waste acceptance criterion and determine the value of the k{sub E} rate parameter for comparison with the Defense HLW Glass Degradation Model [3].

Marra, James

2005-06-29T23:59:59.000Z

60

Geometrically consistent approach to stochastic DBI inflation  

SciTech Connect (OSTI)

Stochastic effects during inflation can be addressed by averaging the quantum inflaton field over Hubble-patch-sized domains. The averaged field then obeys a Langevin-type equation into which short-scale fluctuations enter as a noise term. We solve the Langevin equation for an inflaton field with a Dirac-Born-Infeld (DBI) kinetic term perturbatively in the noise and use the result to determine the field value's probability density function (PDF). In this calculation, both the shape of the potential and the warp factor are arbitrary functions, and the PDF is obtained with and without volume effects due to the finite size of the averaging domain. DBI kinetic terms typically arise in string-inspired inflationary scenarios in which the scalar field is associated with some distance within the (compact) extra dimensions. The inflaton's accessible range of field values therefore is limited because of the extra dimensions' finite size. We argue that in a consistent stochastic approach the inflaton's PDF must vanish for geometrically forbidden field values. We propose to implement these extra-dimensional spatial restrictions into the PDF by installing absorbing (or reflecting) walls at the respective boundaries in field space. As a toy model, we consider a DBI inflaton between two absorbing walls and use the method of images to determine its most general PDF. The resulting PDF is studied in detail for the example of a quartic warp factor and a chaotic inflaton potential. The presence of the walls is shown to affect the inflaton trajectory for a given set of parameters.

Lorenz, Larissa; Martin, Jerome; Yokoyama, Jun'ichi [Theoretical and Mathematical Physics Group, Centre for Particle Physics and Phenomenology, Louvain University, 2 Chemin du Cyclotron, 1348 Louvain-la-Neuve (Belgium); Institut d'Astrophysique de Paris, UMR 7095-CNRS, Universite Pierre et Marie Curie, 98bis boulevard Arago, 75014 Paris (France); Research Center for the Early Universe, Graduate School of Science, University of Tokyo, Tokyo 113-0033 (Japan); Institute for the Physics and Mathematics of the Universe (IPMU), University of Tokyo, Kashiwa, Chiba, 277-8568 (Japan)

2010-07-15T23:59:59.000Z

Note: This page contains sample records for the topic "mixture consisting primarily" from the National Library of EnergyBeta (NLEBeta).
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61

A transient flow model of compressible gas mixtures in a nuclear fuel processing plant  

SciTech Connect (OSTI)

A model was developed to predict mixture concentration profiles in a subatmospheric mixture of hydrogen, nitrogen, and oxygen during valve-switching between a process line and an atmospheric vent line. The switching event allows air in-leakage to the system during the period in which the routing valves are open. Hydrogen and oxygen concentrations must be predicted to assess the potential for developing combustible mixtures in the system. The model consists of a one-dimensional finite-difference representation of the transient momentum and mass conservation equations, associated constitutive relationships and an equation-of-state for compressible gas. The resulting equation set was solved with Advanced Continuous Simulation Language (ACSL).

Farman, R.F.; Brown, R.A.

1989-02-16T23:59:59.000Z

62

Superconductor precursor mixtures made by precipitation method  

DOE Patents [OSTI]

Method and apparatus for preparing highly pure homogeneous precursor powder mixtures for metal oxide superconductive ceramics. The mixes are prepared by instantaneous precipitation from stoichiometric solutions of metal salts such as nitrates at controlled pH's within the 9 to 12 range, by addition of solutions of non-complexing pyrolyzable cations, such as alkyammonium and carbonate ions.

Bunker, Bruce C. (Albuquerque, NM); Lamppa, Diana L. (Albuquerque, NM); Voigt, James A. (Albuquerque, NM)

1989-01-01T23:59:59.000Z

63

Alternative Fuels Data Center: Hydrogen Fuel Mixture Excise Tax Credit  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Mixture Mixture Excise Tax Credit to someone by E-mail Share Alternative Fuels Data Center: Hydrogen Fuel Mixture Excise Tax Credit on Facebook Tweet about Alternative Fuels Data Center: Hydrogen Fuel Mixture Excise Tax Credit on Twitter Bookmark Alternative Fuels Data Center: Hydrogen Fuel Mixture Excise Tax Credit on Google Bookmark Alternative Fuels Data Center: Hydrogen Fuel Mixture Excise Tax Credit on Delicious Rank Alternative Fuels Data Center: Hydrogen Fuel Mixture Excise Tax Credit on Digg Find More places to share Alternative Fuels Data Center: Hydrogen Fuel Mixture Excise Tax Credit on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Hydrogen Fuel Mixture Excise Tax Credit A tax credit of $0.50 per gallon is available for the sale or use of

64

Alternative Fuels Data Center: Biodiesel Mixture Excise Tax Credit  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Mixture Mixture Excise Tax Credit to someone by E-mail Share Alternative Fuels Data Center: Biodiesel Mixture Excise Tax Credit on Facebook Tweet about Alternative Fuels Data Center: Biodiesel Mixture Excise Tax Credit on Twitter Bookmark Alternative Fuels Data Center: Biodiesel Mixture Excise Tax Credit on Google Bookmark Alternative Fuels Data Center: Biodiesel Mixture Excise Tax Credit on Delicious Rank Alternative Fuels Data Center: Biodiesel Mixture Excise Tax Credit on Digg Find More places to share Alternative Fuels Data Center: Biodiesel Mixture Excise Tax Credit on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Biodiesel Mixture Excise Tax Credit A biodiesel blender that is registered with the Internal Revenue Service

65

Thermodynamic perturbation theory for self-assembling mixtures of divalent single patch colloids  

E-Print Network [OSTI]

In this work we extend Wertheim's thermodynamic perturbation theory (TPT) to binary mixtures (species A and species B) of patchy colloids where each species has a single patch which can bond a maximum of twice (divalent). Colloids are treated as hard spheres with a directional conical asssociation site. We restrict the system such that only patches between unlike species share attractions; meaning there are AB attractions but no AA or BB attractions. The theory is derived in Wertheim's two density formalism for one site associating fluids. Since the patches are doubly bondable, associated chains, of all chain lengths, as well as 4-mer rings consisting of two species A and two species B colloids are accounted for. With the restriction of only AB attractions, triatomic rings of doubly bonded colloids, which dominate the corresponding pure component case, cannot form. The theory is shown to be in good agreement with Monte Carlo simulaion data for the structure and thermodynamics of these patchy colloid mixtures as a function of temperature, density, patch size and composition. It is shown that 4-mer rings dominate at low temperatures, inhibiting the polymerization of the mixture into long chains. Mixtures of this type have been recently synthesized by researchers. This work provides the first theory capable of accurately modelling these mixtures.

B. D. Marshall; W. G. Chapman

2014-03-17T23:59:59.000Z

66

Viscosity and Light Scattering in Critical Mixtures  

Science Journals Connector (OSTI)

Simultaneous measurements of both viscosity and light scattering are performed on two critical mixtures. The first one is a triethylamine-water solution, which exhibits a lower consolute point, the second one a methanol-ciclohexane mixture with an upper consolute point. It is found that the singular behavior of viscosity cannot be fitted by a simple power law, nor by a logarithmic one, in the entire range of temperature. The asymptotic behavior, however, tends to become logarithmic as the critical temperature is approached. The simultaneous observation of scattered light allows one to exclude the intervention of spurious processes, like a breaking of correlations because of impurities. In addition, it is shown that the correlation length seems to depend mainly on the reduced temperature, irrespective of the system under examination.

S. Ballaro'; G. Maisano; P. Migliardo; F. Wanderlingh

1972-10-01T23:59:59.000Z

67

Viscosity of a mixture of soft spheres  

Science Journals Connector (OSTI)

The viscosity of a 50% mixture of soft spheres (i.e., particles which interact according to the force law ?=dr12) has been simulated by applying nonequilibrium molecular dynamics to a system of 108 particles. Results for several size (actually d) and mass differences are given and compared with the predictions of a conformal-solution Van der Waals 1 theory. To construct this theory, it was necessary to derive a mixing rule for the mass. Overall, agreement between theory and simulation is satisfactory to size differences of about 14% and to mass differences of about 5%. It is pointed out that nonequilibrium molecular dynamics is a powerful technique and appears well suited to this particular application: The simulated viscosity of the mixture can be obtained to within about 5% accuracy for the 108-particle system by applying a shear to the system and following its behavior for about 7000 time steps.

Denis J. Evans and H. J. M. Hanley

1979-10-01T23:59:59.000Z

68

Soliton trains in Bose-Fermi mixtures  

E-Print Network [OSTI]

We theoretically consider the formation of bright solitons in a mixture of Bose and Fermi degenerate gases. While we assume the forces between atoms in a pure Bose component to be effectively repulsive, their character can be changed from repulsive to attractive in the presence of fermions provided the Bose and Fermi gases attract each other strongly enough. In such a regime the Bose component becomes a gas of effectively attractive atoms. Hence, generating bright solitons in the bosonic gas is possible. Indeed, after a sudden increase of the strength of attraction between bosons and fermions (realized by using a Feshbach resonance technique or by firm radial squeezing of both samples) soliton trains appear in the Bose-Fermi mixture.

T. Karpiuk; M. Brewczyk; S. Ospelkaus-Schwarzer; K. Bongs; M. Gajda; K. Rzazewski

2004-04-14T23:59:59.000Z

69

Shear viscosity of hadronic gas mixtures  

E-Print Network [OSTI]

We investigate the effects of baryon chemical potential \\mu on the shear viscosity coefficient \\eta and the viscosity to entropy density ratio \\eta/s of a pion-nucleon gas mixture. We find that \\eta is an increasing function of T and \\mu, while the ratio \\eta/s turns to a decreasing function in a wide region of T-\\mu plane. In the kinematical region we studied, the smallest value of \\eta/s is about 0.3.

K. Itakura; O. Morimatsu; H. Otomo

2008-05-12T23:59:59.000Z

70

Noise Compensation for Subspace Gaussian Mixture Models  

E-Print Network [OSTI]

Noise Compensation for Subspace Gaussian Mixture Models Liang Lu University of Edinburgh Joint work condition (i.e. noise), the gain disappears Goal Noise compensation for SGMM Method Model space compensation . . .· · · · · · · · · · ·· · ·· · ···· · ·· · ·· vjk Liang Lu, Interspeech, September, 2012 R T S C R T S C #12;Noise compensation Larger modelling

Edinburgh, University of

71

Alternative Fuels Data Center: Alternative Fuel Mixture Excise Tax Credit  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Alternative Fuel Alternative Fuel Mixture Excise Tax Credit to someone by E-mail Share Alternative Fuels Data Center: Alternative Fuel Mixture Excise Tax Credit on Facebook Tweet about Alternative Fuels Data Center: Alternative Fuel Mixture Excise Tax Credit on Twitter Bookmark Alternative Fuels Data Center: Alternative Fuel Mixture Excise Tax Credit on Google Bookmark Alternative Fuels Data Center: Alternative Fuel Mixture Excise Tax Credit on Delicious Rank Alternative Fuels Data Center: Alternative Fuel Mixture Excise Tax Credit on Digg Find More places to share Alternative Fuels Data Center: Alternative Fuel Mixture Excise Tax Credit on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Alternative Fuel Mixture Excise Tax Credit

72

Electrostatically Tuned Interactions in Silica Microsphere-Polystyrene Nanoparticle Mixtures  

E-Print Network [OSTI]

Electrostatically Tuned Interactions in Silica Microsphere-Polystyrene Nanoparticle Mixtures Angel: July 26, 2005 We explore the generality of nanoparticle haloing1 as a novel colloidal stabilization mechanism in binary mixtures of silica microspheres and polystyrene nanoparticles. By selectively tuning

Lewis, Jennifer

73

Measurements of molecular and thermal diffusion coefficients in ternary mixtures  

E-Print Network [OSTI]

of a polymer and a colloid in a water-ethanol solvent, treating the ternary mixture as a pseudobinary; Gans et polymer in a water-ethanol solvent mixture. They reported a sign change in the Soret coefficient

Firoozabadi, Abbas

74

Separation of gas mixtures by thermoacoustic waves.  

SciTech Connect (OSTI)

Imposing sound on a binary gas mixture in a duct separates the two gases along the acoustic-propagation axis. Mole-fraction differences as large as 10% and separation fluxes as high as 0.001 M-squared c, where M is Mach number and c is sound speed, are easily observed. We describe the accidental discovery of this phenomenon in a helium-xenon mixture, subsequent experiments with a helium-argon mixture, and theoretical developments. The phenomenon occurs because a thin layer of the gas adjacent to the wall is immobilized by viscosity while the rest of the gas moves back and forth with the wave, and the heat capacity of the wall holds this thin layer of the gas at constant temperature while the rest of the gas experiences temperature oscillations due to the wave's oscillating pressure. The oscillating temperature gradient causes the light and heavy atoms in the gas to take turns diffusing into and out of the immobilized layer, so that the oscillating motion of the wave outside the immobilized layer tends to carry light-enriched gas in one direction and heavy-enriched gas in the opposite direction. Experiment and theory are in very good agreement for the initial separation fluxes and the saturation mole-fraction differences.

Swift, G. W. (Gregory W.); Geller, D. A. (Drew A.)

2001-01-01T23:59:59.000Z

75

Dual-water mixture fuel burner  

DOE Patents [OSTI]

A coal-water mixture (CWM) burner includes a conically shaped rotating cup into which fuel comprised of coal particles suspended in a slurry is introduced via a first, elongated inner tube coupled to a narrow first end portion of the cup. A second, elongated outer tube is coaxially positioned about the first tube and delivers steam to the narrow first end of the cup. The fuel delivery end of the inner first tube is provided with a helical slot on its lateral surface for directing the CWM onto the inner surface of the rotating cup in the form of a uniform, thin sheet which, under the influence of the cup's centrifugal force, flows toward a second, open, expanded end portion of the rotating cup positioned immediately adjacent to a combustion chamber. The steam delivered to the rotating cup wets its inner surface and inhibits the coal within the CWM from adhering to the rotating cup. A primary air source directs a high velocity air flow coaxially about the expanded discharge end of the rotating cup for applying a shear force to the CWM in atomizing the fuel mixture for improved combustion. A secondary air source directs secondary air into the combustion chamber adjacent to the outlet of the rotating cup at a desired pitch angle relative to the fuel mixture/steam flow to promote recirculation of hot combustion gases within the ignition zone for increased flame stability.

Brown, Thomas D. (Finleyville, PA); Reehl, Douglas P. (Pittsburgh, PA); Walbert, Gary F. (Library, PA)

1986-08-05T23:59:59.000Z

76

ccsd00004127, ON THE SURFACE TENSIONS OF BINARY MIXTURES  

E-Print Network [OSTI]

ccsd­00004127, version 1 ­ 2 Feb 2005 ON THE SURFACE TENSIONS OF BINARY MIXTURES JEAN RUIZ Abstract tensions and the concentrations are brie y reviewed. Key Words: Surface tensions, binary mixtures the corresponding surface tension depends on the composition of the mixture. Some relationship is expected which

77

A bayesian mixture model with linear regression mixing proportions  

Science Journals Connector (OSTI)

Classic mixture models assume that the prevalence of the various mixture components is fixed and does not vary over time. This presents problems for applications where the goal is to learn how complex data distributions evolve. We develop models and ... Keywords: bayesian mixture model, gibbs sampler, linear regression, mixing proportion

Xiuyao Song; Chris Jermaine; Sanjay Ranka; John Gums

2008-08-01T23:59:59.000Z

78

E-Print Network 3.0 - alternating chemoradiotherapy consisting...  

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

Each assessment consisted of an anterior... . Alternate consistencies. 6. Coughswallow occasionally. 7. Supraglottic swallow. 8. Thermal stim. 5-10 times......

79

Usage of Fuel Mixtures Containing Ethanol and Rapeseed Oil Methyl Esters in a Diesel Engine  

Science Journals Connector (OSTI)

However, its use in the diesel engine cycle is hampered by the poor motor-fueling characteristics of lower alcohols and, primarily, the limited solubility of ethanol in fossil diesel fuel and its low self-ignition characteristics. ... Coefficient ? = Gair/(GfL0) estimates air supply into a diesel engine cylinder (indicator process), taking into account the differences of stoichiometric ratio L0 of the tested fuels, caused by the increase of the E portion in the RME?E mixture (Gair is air consumption, and Gf is fuel consumption). ... Future research will concentrate on the analysis of fuel injection and heat release rate characteristics in a cylinder, while a diesel engine is running on biodiesel fuels RME?E, and also on the operational parameters of diesel engines when fossil diesel fuel is replaced with three-component fuels D?RME?E. ...

Sergejus Lebedevas; Galina Lebedeva; Violeta Makareviciene; Prutenis Janulis; Egle Sendzikiene

2008-11-12T23:59:59.000Z

80

Phase diagrams of a model for two-layer He3-He4 mixture films  

Science Journals Connector (OSTI)

We present a Migdal-Kadanoff renormalization-group scheme for a model two-layer classical XY system with annealed impurities. The model Hamiltonian is appropriate for a two-layer He3-He4 mixture system. We find a rich variety of phase diagrams. Depending on the choice of parameters we find either one or two first-order phase-separation transitions, which may be accompanied by the appearance of superfluidity. Phase diagrams with two ? lines are found, making possible two distinct transitions in the superfluid density. In the case of phase-separation transitions, each transition is primarily associated with a single layer, and three-phase coexistence is possible. Comparison with recent experiments is made.

K. K. Mon and W. F. Saam

1981-06-01T23:59:59.000Z

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


81

CATALYTIC GASIFICATION OF COAL USING EUTECTIC SALT MIXTURES  

SciTech Connect (OSTI)

The Gas Research Institute (GRI) estimates that by the year 2010, 40% or more of U.S. gas supply will be provided by supplements including substitute natural gas (SNG) from coal. These supplements must be cost competitive with other energy sources. The first generation technologies for coal gasification e.g. the Lurgi Pressure Gasification Process and the relatively newer technologies e.g. the KBW (Westinghouse) Ash Agglomerating Fluidized-Bed, U-Gas Ash Agglomerating Fluidized-Bed, British Gas Corporation/Lurgi Slagging Gasifier, Texaco Moving-Bed Gasifier, and Dow and Shell Gasification Processes, have several disadvantages. These disadvantages include high severities of gasification conditions, low methane production, high oxygen consumption, inability to handle caking coals, and unattractive economics. Another problem encountered in catalytic coal gasification is deactivation of hydroxide forms of alkali and alkaline earth metal catalysts by oxides of carbon (CO{sub x}). To seek solutions to these problems, a team consisting of Clark Atlanta University (CAU, a Historically Black College and University, HBCU), the University of Tennessee Space Institute (UTSI) and Georgia Institute of Technology (Georgia Tech) proposed to identify suitable low melting eutectic salt mixtures for improved coal gasification. The research objectives of this project were to: Identify appropriate eutectic salt mixture catalysts for coal gasification; Assess agglomeration tendency of catalyzed coal; Evaluate various catalyst impregnation techniques to improve initial catalyst dispersion; Determine catalyst dispersion at high carbon conversion levels; Evaluate effects of major process variables (such as temperature, system pressure, etc.) on coal gasification; Evaluate the recovery, regeneration and recycle of the spent catalysts; and Conduct an analysis and modeling of the gasification process to provide better understanding of the fundamental mechanisms and kinetics of the process.

Dr. Yaw D. Yeboah; Dr. Yong Xu; Dr. Atul Sheth; Dr. Pradeep Agrawal

2001-12-01T23:59:59.000Z

82

Lattice Boltzmann model for the simulation of multicomponent mixtures  

Science Journals Connector (OSTI)

A lattice Boltzmann (LB) model for the simulation of realistic multicomponent mixtures is constructed. In the hydrodynamic limit, the LB model recovers the equations of continuum mechanics within the mixture-averaged diffusion approximation. The present implementation can be used to simulate realistic mixtures with arbitrary Schmidt numbers and molecular masses of the species. The model is applied to the mixing of two opposed jets of different concentrations and the results are in excellent agreement with a continuum model. An application to the simulation of mixtures in microflows is also presented. Results compare well with existing kinetic theory predictions of the slip coefficient for mixtures in a Couette flow.

S. Arcidiacono; I. V. Karlin; J. Mantzaras; C. E. Frouzakis

2007-10-15T23:59:59.000Z

83

Internal consistency and the inner model Sy-David Friedman  

E-Print Network [OSTI]

, we obtain a new type of consistency result. Let Con(ZFC + ) stand for "ZFC + is consistent" and Icon Icon(ZFC + LC) Icon(ZFC + ). Thus a statement is internally consistent iff Icon(ZFC + ) follows from Icon(ZFC + LC) for some large cardinal axiom LC. A statement can be consistent without being internally

84

Effects of pulp consistency and mixing intensity on ozone bleaching  

SciTech Connect (OSTI)

Conventional wisdom holds that ozone bleaching is feasible only at low or high pulp consistencies. However, recent research suggests that ozone bleaching at medium consistency is possible under conditions of high-intensity mixing. This article presents experimental results for softwood and hardwood pulps that were ozone-bleached over a range of consistencies (3-40%) and mixing conditions. Ozone was pressurized and delivered by a proprietary automated system. Results indicate that ozone bleaching at medium consistency can be as effective as bleaching at high consistency. Medium-consistency bleaching has the advantage of greater selectivity, resulting in higher pulp viscosity.

Hurst, M.M. (Quantum Technologies, Inc., Twinsburg, OH (United States))

1993-04-01T23:59:59.000Z

85

July 4, 2012: Discovery of a particle "consistent" with Higgs...  

Energy Savers [EERE]

July 4, 2012: Discovery of a particle "consistent" with Higgs Boson July 4, 2012: Discovery of a particle "consistent" with Higgs Boson July 4, 2012: Discovery of a particle...

86

Densities and isobaric vapor-liquid equilibria for the mixtures formed by four butyl esters and 1-butanol  

SciTech Connect (OSTI)

Densities of 298.15 K and the vapor-liquid equilibria for 1-butanol + butyl methanoate, + butyl ethanoate, + butyl propanoate, and + butyl butanoate have been measured at 101.32 kPa in small capacity ebulliometer. All results were found to be thermodynamically consistent with a point-to-point test. The mixtures containing butyl methanoate and butyl ethanoate show azeotropes at T = 379.14 K, x = 0.871 and T = 389.64 K, x = 0.222, respectively. Different group-contribution methods were applied to these mixtures.

Gonzalez, E.; Ortega, J. [Univ. of Las Palmas de Gran Canaria (Spain)] [Univ. of Las Palmas de Gran Canaria (Spain)

1996-01-01T23:59:59.000Z

87

Internal consistency and the inner model SyDavid Friedman #  

E-Print Network [OSTI]

'' and Icon(ZFC + #) stand for ``there is an inner model of ZFC + #''. A typical consistency result takes result takes the form Icon(ZFC + LC) # Icon(ZFC + #). Thus a statement # is internally consistent i# Icon(ZFC + #) follows from Icon(ZFC + LC) for some large cardinal axiom LC. A statement can be consistent without being

88

CRITICALITY CURVES FOR PLUTONIUM HYDRAULIC FLUID MIXTURES  

SciTech Connect (OSTI)

This Calculation Note performs and documents MCNP criticality calculations for plutonium (100% {sup 239}Pu) hydraulic fluid mixtures. Spherical geometry was used for these generalized criticality safety calculations and three geometries of neutron reflection are: {sm_bullet}bare, {sm_bullet}1 inch of hydraulic fluid, or {sm_bullet}12 inches of hydraulic fluid. This document shows the critical volume and critical mass for various concentrations of plutonium in hydraulic fluid. Between 1 and 2 gallons of hydraulic fluid were discovered in the bottom of HA-23S. This HA-23S hydraulic fluid was reported by engineering to be Fyrquel 220. The hydraulic fluid in GLovebox HA-23S is Fyrquel 220 which contains phosphorus. Critical spherical geometry in air is calculated with 0 in., 1 in., or 12 inches hydraulic fluid reflection.

WITTEKIND WD

2007-10-03T23:59:59.000Z

89

Experiments Upon the Explosions of Hydrocarbon Mixtures  

E-Print Network [OSTI]

of such experiments* B. Reference to previous experimental work. C* Object of present s e r i e s of experiments. (See plan of experiments.) a. Heat produced by explosion of H~C mixture. b. Duration of pressure. c .Rate of combustion and explosion. d. E f f e... as possible the heat produced by the explosion under c e r t a i n conditions. I t i s true that the t o t a l amount of heat / developed may be c a l c u l a t e d matematically i f s u f f i c i e n t data i s a v a i l a b l e , but i t i s also true...

Stone, Fred

1904-01-01T23:59:59.000Z

90

Low temperature fracture evaluation of plasticized sulfur paving mixtures  

E-Print Network [OSTI]

May 1985 Major Subject: Civil Engineering LOW TEMPERATURE FRACTURE EVALUATION OF PLASTICIZED SULFUR PAVING MIXTURES A Thesis by KAMYAR MAHBOUB Approved as to style and content by: Dallas N. Li tie (Chai rman of Committee) Ro e . Lytto Member... modifications to the standard ASTM procedure. These modifications were required due to the nature of plasticized sulfur mixtures and asphalt cement mixtures. The J-integral version of Paris ' law was successfully used to characterize the fatigue...

Mahboub, Kamyar

2012-06-07T23:59:59.000Z

91

Antiandrogenic activity of phthalate mixtures: Validity of concentration addition  

SciTech Connect (OSTI)

Phthalates and bisphenol A have very widespread use leading to significant exposure of humans. They are suspected to interfere with the endocrine system, including the androgen, estrogen and the thyroid hormone system. Here we analyzed the antiandrogenic activity of six binary, and one ternary mixture of phthalates exhibiting complete antiandrogenic doseresponse curves, and binary mixtures of phthalates and bisphenol A at equi-effective concentrations of EC{sub 10}, EC{sub 25} and EC{sub 50} in MDA-kb2 cells. Mixture activity followed the concentration addition (CA) model with a tendency to synergism at high and antagonism at low concentrations. Isoboles and the toxic unit approach (TUA) confirmed the additive to synergistic activity of the binary mixtures BBP + DBP, DBP + DEP and DEP + BPA at high concentrations. Both methods indicate a tendency to antagonism for the EC{sub 10} mixtures BBP + DBP, BBP + DEP and DBP + DEP, and the EC{sub 25} mixture of DBP + BPA. A ternary mixture revealed synergism at the EC{sub 50}, and weak antagonistic activity at the EC{sub 25} level by the TUA. A mixture of five phthalates representing a human urine composition and reflecting exposure to corresponding parent compounds showed no antiandrogenic activity. Our study demonstrates that CA is an appropriate concept to account for mixture effects of antiandrogenic phthalates and bisphenol A. The interaction indicates a departure from additivity to antagonism at low concentrations, probably due to interaction with the androgen receptor and/or cofactors. This study emphasizes that a risk assessment of phthalates should account for mixture effects by applying the CA concept. -- Highlights: ? Antiandrogenic activity of mixtures of 2 and 3 phthalates are assessed in MDA-kb2 cells. ? Mixture activities followed the concentration addition model. ? A tendency to synergism at high and antagonism at low levels occurred.

Christen, Verena [University of Applied Sciences Northwestern Switzerland, School of Life Sciences, Grndenstrasse 40, CH-4132 Muttenz (Switzerland)] [University of Applied Sciences Northwestern Switzerland, School of Life Sciences, Grndenstrasse 40, CH-4132 Muttenz (Switzerland); Crettaz, Pierre; Oberli-Schrmmli, Aurelia [Swiss Federal Office of Public Health, Division Chemical Products, 3003 Bern (Switzerland)] [Swiss Federal Office of Public Health, Division Chemical Products, 3003 Bern (Switzerland); Fent, Karl, E-mail: karl.fent@bluewin.ch [University of Applied Sciences Northwestern Switzerland, School of Life Sciences, Grndenstrasse 40, CH-4132 Muttenz (Switzerland) [University of Applied Sciences Northwestern Switzerland, School of Life Sciences, Grndenstrasse 40, CH-4132 Muttenz (Switzerland); Swiss Federal Institute of Technology Zrich (ETH Zrich), Department of Environmental Sciences, 8092 Zrich (Switzerland)

2012-03-01T23:59:59.000Z

92

Matter-wave quantum dots and antidots in ultracold atomic Bose-Fermi mixtures  

Science Journals Connector (OSTI)

The properties of ultracold atomic Bose-Fermi mixtures in external potentials are investigated and the existence of gap solitons of Bose-Fermi mixtures in optical lattices demonstrated. Using a self-consistent approach we compute the energy spectrum and show that gap solitons can be viewed as matter-wave realizations of quantum dots and antidots with the bosonic density playing the role of trapping (expulsive) potential for the fermions. The fermionic states trapped in the condensate are shown to be at the bottom of the Fermi sea and therefore well protected from thermal decoherence. Energy levels, filling factors, and parameters dependence of gap soliton quantum dots are also calculated both numerically and analytically.

Mario Salerno

2005-12-02T23:59:59.000Z

93

Prediction of New Hydrogen Storage Compounds and Mixtures  

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

8, 2006 DOE Theory Focus Session on Hydrogen Storage Materials Prediction of New Hydrogen Storage Compounds and Mixtures Vidvuds Ozoli UCLA Research supported by DOE grants No....

94

Prediction of New Hydrogen Storage Compounds and Mixtures  

Broader source: Energy.gov [DOE]

Presentation on the Prediction of New Hydrogen Storage Compounds and Mixtures given at the DOE Theory Focus Session on Hydrogen Storage Materials on May 18, 2006.

95

Determining inert content in coal dust/rock dust mixture  

DOE Patents [OSTI]

A method and apparatus for determining the inert content of a coal dust and rock dust mixture uses a transparent window pressed against the mixture. An infrared light beam is directed through the window such that a portion of the infrared light beam is reflected from the mixture. The concentration of the reflected light is detected and a signal indicative of the reflected light is generated. A normalized value for the generated signal is determined according to the relationship .phi.=(log i.sub.c `log i.sub.co) / (log i.sub.c100 -log i.sub.co) where i.sub.co =measured signal at 0% rock dust i.sub.c100 =measured signal at 100% rock dust i.sub.c =measured signal of the mixture. This normalized value is then correlated to a predetermined relationship of .phi. to rock dust percentage to determine the rock dust content of the mixture. The rock dust content is displayed where the percentage is between 30 and 100%, and an indication of out-of-range is displayed where the rock dust percent is less than 30%. Preferably, the rock dust percentage (RD%) is calculated from the predetermined relationship RD%=100+30 log .phi.. where the dust mixture initially includes moisture, the dust mixture is dried before measuring by use of 8 to 12 mesh molecular-sieves which are shaken with the dust mixture and subsequently screened from the dust mixture.

Sapko, Michael J. (Finleyville, PA); Ward, Jr., Jack A. (Oakmont, PA)

1989-01-01T23:59:59.000Z

96

35th EPS PPC Self-consistent energetic particle nonlinear dynamics ... 1 Self-consistent energetic particle  

E-Print Network [OSTI]

35th EPS PPC Self-consistent energetic particle nonlinear dynamics ... 1 Self-consistent energetic, Irvine CA 92697-4575, U.S.A. P5.056 ­ June 13.th, 2008 35.th EPS Plasma Physics Conference Hersonissos Zonca and Liu Chen #12;35th EPS PPC Self-consistent energetic particle nonlinear dynamics ... 2 Abstract

Zonca, Fulvio

97

VISCOSITY OF NEMATIC-CHIRAL MIXTURES AND THEIR ELECTROOPTICAL CHARACTERISTICS  

E-Print Network [OSTI]

VISCOSITY OF NEMATIC-CHIRAL MIXTURES AND THEIR ELECTROOPTICAL CHARACTERISTICS Z. M. ELASHVILI, M. D of Georgian SSR, Tbilisi 380086, S. Euli str. 5, USSR Abstract. -- We have measured the viscosity in mixtures that the increase of the viscosity at low additive concentration (Cm

Boyer, Edmond

98

Blind Signal Separation in Teleconferencing using the ICA Mixture Model  

E-Print Network [OSTI]

sensors in nonstationary environments is presented. The algorithm is based on the ICA mixture model more sources than sensors if sources are in different mixing classes. The required number of sensors mixture model can sepa­ rate two speech signals and a background music signal with only two microphones

Lee, Te-Won

99

Surface tension in a reactive binary mixture of incompressible fluids  

E-Print Network [OSTI]

Surface tension in a reactive binary mixture of incompressible fluids Henning Struchtrup Institute with a distributed form of surface tension. The model describes chemistry, diffusion, viscosity and heat transfer tension at the front. Keywords: Binary mixtures, Surface tension, Irreversible thermodynamics, Hele

Struchtrup, Henning

100

Separation of Azeotropic Mixtures in Closed Batch Distillation Arrangements  

E-Print Network [OSTI]

Separation of Azeotropic Mixtures in Closed Batch Distillation Arrangements S. Skouras and S, Norway SCOPE OF THE PROJECT ·How can we separate ternary mixtures in closed batch distillation-up period is required, followed by a heteroazeotropic distillation step (Figure 3) Modified: The separation

Skogestad, Sigurd

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


101

Modeling documents as mixtures of persons for expert finding  

E-Print Network [OSTI]

Modeling documents as mixtures of persons for expert finding Pavel Serdyukov and Djoerd Hiemstra the as- sumption that terms in documents are produced by people who are men- tioned in them. We represent documents retrieved to a query as mixtures of candidate experts language models. Two methods of personal lan

Hiemstra, Djoerd

102

Memory consistency models for high performance distributed computing  

E-Print Network [OSTI]

This thesis develops a mathematical framework for specifying the consistency guarantees of high performance distributed shared memory multiprocessors. This framework is based on computations, which specify the operations ...

Luchangco, Victor

2001-01-01T23:59:59.000Z

103

California Department of Fish and Wildlife Consistency Determination...  

Open Energy Info (EERE)

search OpenEI Reference LibraryAdd to library Web Site: California Department of Fish and Wildlife Consistency Determination Webpage Abstract This website explains the...

104

On the economic interpretation of time consistent dynamic stochastic ...  

E-Print Network [OSTI]

Based on rigorous mathematical foundations, we impel practical usage of time consistent models as we provide practitioners with an intuitive economic...

Birgit Rudloff

105

Pitch-variable blazed grating consisting of freestanding silicon beams  

Science Journals Connector (OSTI)

Theoretical analysis is presented for a pitch-variable blazed grating which consists of freestanding silicon beams. The pitch-variable blazed grating is implemented by combining...

Wang, Yongjin; Kanamori, Yoshiaki; Hane, Kazuhiro

2009-01-01T23:59:59.000Z

106

Adsorptive separation of propylene-propane mixtures  

SciTech Connect (OSTI)

The separation of propylene-propane mixtures is of great commercial importance and is carried out by fractional distillation. It is claimed to be the most energy-intensive distillation practiced in the United States. The purpose of this paper is to describe experimental work that suggests a practical alternative to distillation for separating the C[sub 3] hydrocarbons: adsorption. As studied, the process involves three adsorptive steps: initial separation with molecular sieves with heavy dilution with an inert gas; separation of propylene and propane separately from the inert gas, using activated carbon; and drying of the product streams with any of several available desiccants. The research information presented here deals with the initial step and includes both equilibrium and kinetic data. Isotherms are provided for propylene and propane adsorbed on three zeolites, activated alumina, silica gel, and coconut-based activated carbon. Breakthrough data are provided for both adsorption and regeneration steps for the zeolites, which were found to be superior to the other adsorbents for breakthrough separations. A flow diagram for the complete proposed process is included.

Jaervelin, H.; Fair, J.R. (Univ. of Texas, Austin, TX (United States))

1993-10-01T23:59:59.000Z

107

Method for identifying known materials within a mixture of unknowns  

DOE Patents [OSTI]

One or both of two methods and systems are used to determine concentration of a known material in an unknown mixture on the basis of the measured interaction of electromagnetic waves upon the mixture. One technique is to utilize a multivariate analysis patch technique to develop a library of optimized patches of spectral signatures of known materials containing only those pixels most descriptive of the known materials by an evolutionary algorithm. Identity and concentration of the known materials within the unknown mixture is then determined by minimizing the residuals between the measurements from the library of optimized patches and the measurements from the same pixels from the unknown mixture. Another technique is to train a neural network by the genetic algorithm to determine the identity and concentration of known materials in the unknown mixture. The two techniques may be combined into an expert system providing cross checks for accuracy.

Wagner, John S. (Albuquerque, NM)

2000-01-01T23:59:59.000Z

108

System for identifying known materials within a mixture of unknowns  

DOE Patents [OSTI]

One or both of two methods and systems are used to determine concentration of a known material in an unknown mixture on the basis of the measured interaction of electromagnetic waves upon the mixture. One technique is to utilize a multivariate analysis patch technique to develop a library of optimized patches of spectral signatures of known materials containing only those pixels most descriptive of the known materials by an evolutionary algorithm. Identity and concentration of the known materials within the unknown mixture is then determined by minimizing the residuals between the measurements from the library of optimized patches and the measurements from the same pixels from the unknown mixture. Another technique is to train a neural network by the genetic algorithm to determine the identity and concentration of known materials in the unknown mixture. The two techniques may be combined into an expert system providing cross checks for accuracy.

Wagner, John S. (Albuquerque, NM)

1999-01-01T23:59:59.000Z

109

System for identifying known materials within a mixture of unknowns  

DOE Patents [OSTI]

One or both of two methods and systems are used to determine concentration of a known material in an unknown mixture on the basis of the measured interaction of electromagnetic waves upon the mixture. One technique is to utilize a multivariate analysis patch technique to develop a library of optimized patches of spectral signatures of known materials containing only those pixels most descriptive of the known materials by an evolutionary algorithm. Identity and concentration of the known materials within the unknown mixture is then determined by minimizing the residuals between the measurements from the library of optimized patches and the measurements from the same pixels from the unknown mixture. Another technique is to train a neural network by the genetic algorithm to determine the identity and concentration of known materials in the unknown mixture. The two techniques may be combined into an expert system providing cross checks for accuracy. 37 figs.

Wagner, J.S.

1999-07-20T23:59:59.000Z

110

The use of kaolinite/zeolite mixtures for landfill liners  

Science Journals Connector (OSTI)

The use of kaolinite/zeolite mixtures as alternative landfill materials has been studied. The ratios of kaolinite/zeolite used were K/Z = 0.1, K/Z = 0.2 and K/Z = 0.3. To determine the geotechnical and physicochemical properties of the mixtures, their optimum moisture content, which provides the best compression out in the field, was determined by a compaction test. Also, tests for unconfined compression strength, hydraulic conductivity and consolidation were carried out. As a result, the optimum mixture was found to be K/Z = 0.2. To test the effect of contaminants, this optimum mixture was contaminated with Na, Ca, Pb, and Cu, and tests of the specific gravity, liquid and plastic limits, unconfined compression strength, consolidation, pH, and electrical conductivity were performed. It is concluded that the K/Z = 0.20 mixture has high absorption capacity and can be used in the landfill liner materials.

Yucel Guney; Savas Koparel

2005-01-01T23:59:59.000Z

111

Internal and External Consistency, Wintersemester 2005 1.-6.Vorlesungen  

E-Print Network [OSTI]

; and Icon(ZFC + #) stand for #16;there is an inner model of ZFC + ##17;. A typical consistency result takes result takes the form Icon(ZFC + LC) # Icon(ZFC + #). Thus a statement # is internally consistent relative to large cardinals i#27; Icon(ZFC + #) follows from Icon(ZFC + LC) for some large cardinal axiom

112

Allowing Atomic Objects to Coexist with Sequentially Consistent Objects  

E-Print Network [OSTI]

) sequential consistency orders all write operations, while causal consistency does not require to order the operations on all the concurrent objects be totally ordered in such a way that each read operation obtains the last value written into the corresponding object. They differ in the meaning of the word "last

Roy, Matthieu

113

TWO-PHASE NONPARAMETRIC ICA ALGORITHM FOR BLIND SEPARATION OF INSTANTANEOUS LINEAR MIXTURES  

E-Print Network [OSTI]

We propose a nonparametric independent component analysis (ICA) algorithm for the problem of blind source separation with instantaneous, time-invariant and linear mixtures. Our Init-NLE algorithm combines minimization of correlation among nonlinear expansions of the output signals with a good initialization derived from search guided by statistical tests for independence based on the power-divergent family of test statistics. Such initialization is critical to reliable separation. The simulation results obtained from both synthetic and real-life data show that our method yields consistent results and compares favorably to the existing ICA algorithms. 1.

Chin-jen Ku; Terrence L. Fine

114

Modeling And Measurements Of The Arc Plasma In A Mixture Of Gases  

SciTech Connect (OSTI)

Radial distributions of Ar mass fractions and temperatures in plasmas produced in a wall-stabilized arc have been calculated. Modeling have been performed for many different mixtures of Ar+N2 and three different arc currents. The obtained results show that the radial distributions of Ar mass fractions strongly depend on the chemical composition of the plasma. In plasmas containing large amount of Ar the distributions have local minima at the arc axis (in high temperature plasma regions), whereas in plasmas consisting mainly of nitrogen the distributions reveal maxima on the discharge axis. Those features seem to be connected with the dissociation of the nitrogen.

Pawelec, E.; KsiaPzek, I. [University of Opole, Oleska 48, Opole (Poland)

2006-01-15T23:59:59.000Z

115

Gas mixture for diffuse-discharge switch  

DOE Patents [OSTI]

Gaseous medium in a diffuse-discharge switch of a high-energy pulse generator is formed of argon combined with a compound selected from the group consisting of CF/sub 4/, C/sub 2/F/sub 6/, C/sub 3/F/sub 8/, n-C/sub 4/F/sub 10/, WF/sub 6/, (CF/sub 3/)/sub 2/S and (CF/sub 3/)/sub 2/O.

Christophorou, L.G.; Carter, J.G.; Hunter, S.R.

1982-08-31T23:59:59.000Z

116

Laboratory evaluation of crumb rubber asphalt concrete mixtures using the concepts of SMA mixtures  

E-Print Network [OSTI]

. 0 3. 1 4. 2 43 3. 8 0 y wcig t o aggregate From this Table, we may conclude that the mixtures containing rubber contents of 0. 5% by weight of the aggregate were the optimum rubber contents that can be incorporated in this dense-graded mix... LABORATORY INVESTIGATION 35 Testing Program . Preparation of the Samples Preconditioning of the Test Specimens Testing of the Samples . V DISCUSSION OF TEST RESULTS AND PERFORMANCE EVALUATION 39 39 43 45 48 Resilient Modulus Indirect Tensile...

Rebala, Somasekhar Reddy

2012-06-07T23:59:59.000Z

117

IGNITION IMPROVEMENT OF LEAN NATURAL GAS MIXTURES  

SciTech Connect (OSTI)

This report describes work performed during a thirty month project which involves the production of dimethyl ether (DME) on-site for use as an ignition-improving additive in a compression-ignition natural gas engine. A single cylinder spark ignition engine was converted to compression ignition operation. The engine was then fully instrumented with a cylinder pressure transducer, crank shaft position sensor, airflow meter, natural gas mass flow sensor, and an exhaust temperature sensor. Finally, the engine was interfaced with a control system for pilot injection of DME. The engine testing is currently in progress. In addition, a one-pass process to form DME from natural gas was simulated with chemical processing software. Natural gas is reformed to synthesis gas (a mixture of hydrogen and carbon monoxide), converted into methanol, and finally to DME in three steps. Of additional benefit to the internal combustion engine, the offgas from the pilot process can be mixed with the main natural gas charge and is expected to improve engine performance. Furthermore, a one-pass pilot facility was constructed to produce 3.7 liters/hour (0.98 gallons/hour) DME from methanol in order to characterize the effluent DME solution and determine suitability for engine use. Successful production of DME led to an economic estimate of completing a full natural gas-to-DME pilot process. Additional experimental work in constructing a synthesis gas to methanol reactor is in progress. The overall recommendation from this work is that natural gas to DME is not a suitable pathway to improved natural gas engine performance. The major reasons are difficulties in handling DME for pilot injection and the large capital costs associated with DME production from natural gas.

Jason M. Keith

2005-02-01T23:59:59.000Z

118

Responses in Milk Constituents to Intravascular Administration of Two Mixtures of Amino Acids to Dairy Cows  

E-Print Network [OSTI]

to inves- tigate the effects of intravascular infusions of AA mixtures on milk constituents. Cows were infusion, followed by a 5-djugular infusion of a mixture of AA. Two mixtures of AA were used in a crossover (total AA); this mixture was infused at 400 g of M d . The other mixture represented the essential AA

Bequette, Brian J.

119

Thermodynamic analysis of organic Rankine cycle using zeotropic mixtures  

Science Journals Connector (OSTI)

Abstract In recent years, more and more attention has been paid to organic Rankine cycle (ORC), which is simply structured, highly reliable and easily maintainable. In order to improve the efficiency of ORC systems, zeotropic mixtures whose phase change process is variable temperature, are used as working fluids to match the temperature profiles of the heat source and heat sink. In this paper, a thermodynamic model which mainly includes Jacob number and the ratio of evaporation temperature and condensation temperature is proposed to forecast the thermal efficiency, output work and exergy efficiency of ORC system with zeotropic mixture. Furthermore, the proposed model programmed by Mablab 2010a is verified by the theoretical data. Then, for different heat source inlet temperature, using different zeotropic mixture pairs, output work that is objective function is maximized by optimizing the evaporation temperature. The results show that if the other working conditions are fixed, the heat source inlet temperature has a significant influence on the best composition of zeotropic mixtures at the optimal evaporation temperature. With the increase of heat source inlet temperature, there exists a heat source inlet temperature that pure working fluid has better system performance than zeotropic mixture. The extent of ORC system performance improvement has a positive correlation with zeotropic mixtures temperature glide.

Li Zhao; Junjiang Bao

2014-01-01T23:59:59.000Z

120

Improved gas mixtures for gas-filled radiation detectors  

DOE Patents [OSTI]

Improved binary and ternary gas mixtures for gas-filled radiation detectors are provided. The components are chosen on the basis of the principle that the first component is one molecular gas or mixture of two molecular gases having a large electron scattering cross section at energies of about 0.5 eV and higher, and the second component is a noble gas having a very small cross section at and below about 1.0 eV, whereby fast electrons in the gaseous mixture are slowed into the energy range of about 0.5 eV where the cross section for the mixture is small and hence the electron mean free path is large. The reduction in both the cross section and the electron energy results in an increase in the drift velocity of the electrons in the gas mixtures over that for the separate components for a range of E/P (pressure-reduced electric field) values. Several gas mixtures are provided that provide faster response in gas-filled detectors for convenient E/P ranges as compared with conventional gas mixtures.

Christophorou, L.G.; McCorkle, D.L.; Maxey, D.V.; Carter, J.G.

1980-03-28T23:59:59.000Z

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


121

Commensurate mixtures of ultracold atoms in one dimension  

Science Journals Connector (OSTI)

We study binary mixtures of ultracold atoms, confined to one dimension in an optical lattice, with commensurate densities. Within a Luttinger liquid description, which treats various mixtures on equal footing, we derive a system of renormalization group equations at second order, from which we determine the rich phase diagrams of these mixtures. These phases include charge and spin density wave orders, singlet and triplet pairings, polaron pairing [L. Mathey et al., Phys. Rev. Lett. 93, 120404 (2004)], and a supersolid phase. Various methods to detect our results experimentally are discussed.

L. Mathey

2007-04-24T23:59:59.000Z

122

Methods of separating short half-life radionuclides from a mixture of radionuclides  

DOE Patents [OSTI]

The present invention is a method of obtaining a radionuclide product selected from the group consisting of .sup.223 Ra and .sup.225 Ac, from a radionuclide "cow" of .sup.227 Ac or .sup.229 Th respectively. The method comprises the steps of a) permitting ingrowth of at least one radionuclide daughter from said radionuclide "cow" forming an ingrown mixture; b) insuring that the ingrown mixture is a nitric acid ingrown mixture; c) passing the nitric acid ingrown mixture through a first nitrate form ion exchange column which permits separating the "cow" from at least one radionuclide daughter; d) insuring that the at least one radionuclide daughter contains the radionuclide product; e) passing the at least one radionuclide daughter through a second ion exchange column and separating the at least one radionuclide daughter from the radionuclide product and f) recycling the at least one radionuclide daughter by adding it to the "cow". In one embodiment the radionuclide "cow" is the .sup.227 Ac, the at least one daughter radionuclide is a .sup.227 Th and the product radionuclide is the .sup.223 Ra and the first nitrate form ion exchange column passes the .sup.227 Ac and retains the .sup.227 Th. In another embodiment the radionuclide "cow"is the .sup.229 Th, the at least one daughter radionuclide is a .sup.225 Ra and said product radionuclide is the .sup.225 Ac and the .sup.225 Ac and nitrate form ion exchange column retains the .sup.229 Th and passes the .sup.225 Ra/Ac.

Bray, Lane A. (Richland, WA); Ryan, Jack L. (West Richland, WA)

1998-01-01T23:59:59.000Z

123

Training Reciprocity Achieves Greater Consistency, Saves Time and Money for  

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

Training Reciprocity Achieves Greater Consistency, Saves Time and Training Reciprocity Achieves Greater Consistency, Saves Time and Money for Idaho, Other DOE Sites Training Reciprocity Achieves Greater Consistency, Saves Time and Money for Idaho, Other DOE Sites November 26, 2013 - 12:00pm Addthis IDAHO FALLS, Idaho - Contracting companies supporting EM's cleanup program at the Idaho site volunteered to be among the first to use a new DOE training reciprocity program designed to bring more consistency to health and safety training across the complex, reduce redundancy and realize savings and other efficiencies. The DOE Office of Health, Safety and Security (HSS) program is meant to eliminate the need for Department employees and contractors to take redundant training when they move among multiple sites in the complex.

124

Training Reciprocity Achieves Greater Consistency, Saves Time and Money for  

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

Training Reciprocity Achieves Greater Consistency, Saves Time and Training Reciprocity Achieves Greater Consistency, Saves Time and Money for Idaho, Other DOE Sites Training Reciprocity Achieves Greater Consistency, Saves Time and Money for Idaho, Other DOE Sites November 26, 2013 - 12:00pm Addthis IDAHO FALLS, Idaho - Contracting companies supporting EM's cleanup program at the Idaho site volunteered to be among the first to use a new DOE training reciprocity program designed to bring more consistency to health and safety training across the complex, reduce redundancy and realize savings and other efficiencies. The DOE Office of Health, Safety and Security (HSS) program is meant to eliminate the need for Department employees and contractors to take redundant training when they move among multiple sites in the complex.

125

BILIWG: Consistent "Figures of Merit" (Presentation)  

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

BILIWG: Consistent "Figures of Merit" BILIWG: Consistent "Figures of Merit" A finite set of results reported in consistent units * To track progress of individual projects on a consistent basis * To enable comparing projects in a transparent manner Potential BILIWG Figures of Merit Key BILI Distributed Reforming Targets * Cost ($/kg of H2): H2A analysis - Distributed reforming station,1000 kg/day ave./daily dispensed, 5000/6250 psi (and 10,000/12,000 psi) dispensing, 500 units/yr. * nth unit vs. 500 units/yr ? * production unit only (with 300 psi outlet pressure) ? * Production unit efficiency: LHV H2 out/(LHV of feedstocks and all other energy in) GTG - WTG efficiency? - Feedstock conversion energy efficiency? * Production unit capital cost: Distributed reforming station,1000 kg/day ave./daily dispensed, 300 psi outlet pressure

126

A Preliminary Study Towards Consistent Soil Moisture from AMSR2  

Science Journals Connector (OSTI)

A preliminary study towards consistent soil moisture products from the Advanced Microwave Scanning Radiometer 2 (AMSR2) is presented. Its predecessor, the Advanced Microwave Scanning Radiometer Earth Observing System (AMSR-E), has provided Earth ...

Robert M. Parinussa; Thomas R.H. Holmes; Niko Wanders; Wouter A. Dorigo; Richard A.M. de Jeu

127

Shared Memory Parallel Programming with Entry Consistency for Distributed Memory  

E-Print Network [OSTI]

Midway: Shared Memory Parallel Programming with Entry Consistency for Distributed Memory to ensure a correctly functioning program. Midway is a shared memory parallel programming system which addresses the problem of excessive communication in a distributed memory multiprocessor. Midway programs

128

Consistent and efficient reconstruction of latent tree models  

E-Print Network [OSTI]

We study the problem of learning a latent tree graphical model where samples are available only from a subset of variables. We propose two consistent and computationally efficient algorithms for learning minimal latent ...

Choi, Myung Jin

129

Consistency relations for spinning matter in gravitational theories  

Science Journals Connector (OSTI)

We explore the consistency equations that result from Euler's equations for the improved perfect-fluid energy-momentum tensor for a charged spinning fluid in the Einstein-Cartan theory.

John R. Ray and Larry L. Smalley

1986-11-15T23:59:59.000Z

130

Extended Gaussianization Method for Blind Separation of Post-Nonlinear Mixtures  

Science Journals Connector (OSTI)

The linear mixture model has been investigated in most articles tackling the problem of blind source separation. Recently, several articles have addressed a more complex model: blind source separation (BSS) of postnonlinear (PNL) mixtures. These mixtures ...

Kun Zhang; Lai-Wan Chan

2005-02-01T23:59:59.000Z

131

LETTER Community ecology theory predicts the effects of agrochemical mixtures on aquatic biodiversity and ecosystem  

E-Print Network [OSTI]

LETTER Community ecology theory predicts the effects of agrochemical mixtures on aquatic experiment to examine the effects of pairwise agrochemical mixtures [fertiliser, herbicide (atrazine. As postulated, the responses of biodiversity and ecosystem properties to agrochemicals alone and in mixtures

Lajeunesse, Marc J.

132

A simplified procedure for estimation of mixture permeances from...  

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

of mixture permeances from unary permeation data Previous Next List Rajamani Krishna, Jasper M. van Baten, J. Membr. Sci., 367, 204-210 (2011) DOI: 10.1016j.memsci.2010.10.055...

133

Influence of adsorption on the diffusion selectivity for mixture...  

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

mixture permeation across mesoporous membranes Previous Next List Rajamani Krishna, Jasper M. van Baten, J. Membr. Sci., 369, 545-549 (2011) DOI: 10.1016j.memsci.2010.12.042...

134

IMPROVING MIX DESIGN AND CONSTRUCTION OF PERMEABLE FRICTION COURSE MIXTURES  

E-Print Network [OSTI]

Permeable friction course (PFC), or new generation open-graded friction course (OGFC) mixtures, are hot mix asphalt (HMA) characterized by high total air voids (AV) content (minimum 18 %) as compared to the most commonly used dense-graded HMA...

Alvarez Lugo, Allex Eduardo

2012-02-14T23:59:59.000Z

135

Spontaneous detonation of a mixture of two odd electron gases  

Science Journals Connector (OSTI)

Spontaneous detonation of a mixture of two odd electron gases ... Instructions for safe detonation of ClO2 and NO (the fastest known reaction between two stable molecules at room temperature). ...

Thomas S. Briggs

1991-01-01T23:59:59.000Z

136

Contour extraction by mixture density description obtained from region clustering  

Science Journals Connector (OSTI)

This paper describes a contour extraction scheme which refines a roughly estimated initial contour to outline a precise object boundary. In our approach, mixture density descriptions, which are parametric desc...

Minoru Etoh; Yoshiaki Shirai; Minoru Asada

1992-01-01T23:59:59.000Z

137

Deconvolution in Random Effects Models via Normal Mixtures  

E-Print Network [OSTI]

This dissertation describes a minimum distance method for density estimation when the variable of interest is not directly observed. It is assumed that the underlying target density can be well approximated by a mixture of normals. The method...

Litton, Nathaniel A.

2010-10-12T23:59:59.000Z

138

Quantum degenerate mixtures of strontium and rubidium atoms  

E-Print Network [OSTI]

We report on the realization of quantum degenerate gas mixtures of the alkaline-earth element strontium with the alkali element rubidium. A key ingredient of our scheme is sympathetic cooling of Rb by Sr atoms that are continuously laser cooled on a narrow linewidth transition. This versatile technique allows us to produce ultracold gas mixtures with a phase-space density of up to 0.06 for both elements. By further evaporative cooling we create double Bose-Einstein condensates of 87Rb with either 88Sr or 84Sr, reaching more than 10^5 condensed atoms per element for the 84Sr-87Rb mixture. These quantum gas mixtures constitute an important step towards the production of a quantum gas of polar, open-shell RbSr molecules.

Pasquiou, Benjamin; Tzanova, Slava; Stellmer, Simon; Szczepkowski, Jacek; Parigger, Mark; Grimm, Rudolf; Schreck, Florian

2013-01-01T23:59:59.000Z

139

Breath is a mixture of nitrogen, oxygen, carbon dioxide, water  

E-Print Network [OSTI]

12 SCIENCE Breath is a mixture of nitrogen, oxygen, carbon dioxide, water vapour, inert gases. On the basis of proton affinity, the major constituents of air and breath (nitrogen, oxygen, carbon dioxide

140

Bayesian variable selection in clustering via dirichlet process mixture models  

E-Print Network [OSTI]

simultane- ously. I use Dirichlet process mixture models to define the cluster structure and to introduce in the model a latent binary vector to identify discriminating variables. I update the variable selection index using a Metropolis algorithm and obtain...

Kim, Sinae

2007-09-17T23:59:59.000Z

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


141

Investigation of Organic Rankine Cycle Performance with Variable Mixture Composition  

Science Journals Connector (OSTI)

The present study deals with a comprehensive thermodynamic modeling of a renewable energy-based organic Rankine cycle (ORC). In this regard, two ... investigate the effect of mixture composition on the cycle perf...

H. Barzegaravval; Ibrahim Dincer

2014-01-01T23:59:59.000Z

142

Observable fast kinetic eigenmode in binary noble-gas mixtures  

SciTech Connect (OSTI)

It is suggested that a fast kinetic mode should be observable in a whole class of disparate mass fluid mixtures, such as gaseous He-Xe, by neutron scattering experiments, at not too high densities and Xe concentrations.

Campa, A.; Cohen, E.G.D.

1988-08-15T23:59:59.000Z

143

Electron drift velocity in CO2 laser mixtures  

Science Journals Connector (OSTI)

A modified Bradbury-Nielsen grid system has been used to measure...W in two gas mixtures of special interest when modelling h.p. CO2 lasers. The results are compared with the theoretical values obtained with the ...

G. L. Braglia; L. Roman; W. Roznerski

144

Finite Element Studies of Colloidal Mixtures Influenced by Electric Fields  

E-Print Network [OSTI]

A further understanding of colloidal mixture behavior under applied electric fields would greatly benefit the design of smart material systems such as electrorheological fluidic devices and microfluidic reconfigurable antennas. This thesis presents...

Drummond, Franklin Jerrel

2011-10-21T23:59:59.000Z

145

Ignition Delay Times of Kerosene(Jet-A)/Air Mixtures  

E-Print Network [OSTI]

Ignition of Jet-A/air mixtures was studied behind reflected shock waves. Heating of shock tube at temperature of 150 C was used to prepare a homogeneous fuel mixture. Ignition delay times were measured from OH emission at 309 nm and from absorption of He-Ne laser radiation at 3.3922 micrometers. The conditions behind shock waves were calculated by one-dimensional shock wave theory from initial conditions T1, P1, mixture composition and incident shock wave velocity. The ignition delay times were obtained at two fixed pressures 10, 20 atm for lean, stoichiometric and rich mixtures (ER=0.5, 1, 2) at an overall temperature range of 1040-1380 K.

Zhukov, V P; Starikovskii, A Yu

2012-01-01T23:59:59.000Z

146

Laser-based ignition of hydrogen-oxygen mixture  

Science Journals Connector (OSTI)

Two possible results of an impulse energy injection into the gas mixture are investigated. In the first case it is supposed, that in the gas an equilibrium spherical plasma spot is formed and its disintegratio...

Y.V. Tunik; O. Haidn; O.P. Shatalov

2009-01-01T23:59:59.000Z

147

Laser-initiated ignition of hydrogen-air mixtures  

Science Journals Connector (OSTI)

The subject of investigation is the kinetic mechanisms intensifying chain reactions that proceed in a hydrogen-air mixture when O2 molecules dissociate under the action of laser radiation with wavelength ? ...

A. M. Starik; P. S. Kuleshov; N. S. Titova

2009-03-01T23:59:59.000Z

148

Microscopic Transport in Mixtures of Room Temperature Ionic Liquids...  

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

andor storage of carbon dioxide. For these applications in addition to CO 2 sorption properties, also transport properties of the mixtures of CO 2 and ILs are of high...

149

Simulations of oscillatory convection in 3 He mixtures in moderate  

E-Print Network [OSTI]

performed in salt-water mixtures,9 subsequent experiments focused on 3 He­4 He Refs. 1 and 10­12 and water to a water-ethanol mixture with separation ratio S=-0.021 in containers of aspect ratio 16 17 and R-Rc /Rc 10 the aspect ratio may be quite large. · The primary instability takes the form of a subcritical bi- furcation

Batiste, Oriol

150

E-Print Network 3.0 - adaptive mixture modelling Sample Search...  

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

Summary: for each mixture in the prior model. Unlike the second step of the EM algorithm, for adaptation these "new... Using Adapted Gaussian Mixture Models. Digital Signal...

151

Bubble-Point Measurements of Eight Binary Mixtures for Organic Rankine Cycle Applications  

Science Journals Connector (OSTI)

Bubble-Point Measurements of Eight Binary Mixtures for Organic Rankine Cycle Applications ... These mixtures are of interest as working fluids in organic Rankine power cycles. ...

Stephanie L. Outcalt; Eric W. Lemmon

2013-05-24T23:59:59.000Z

152

Generation of a Consistent Terrestrial Net Primary Production Data Set  

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

Generation of a Consistent Terrestrial Net Generation of a Consistent Terrestrial Net Primary Production Data Set Final Report NASA Reference Number TE/99-0005 May 3, 2001 Richard J. Olson and Jonathan M. O. Scurlock Environmental Sciences Division Oak Ridge National Laboratory Oak Ridge, Tennessee 37831-6407 This project, "Generation of a Consistent Terrestrial Net Primary Production Data Set", is a coordinated, international effort to compile global estimates of terrestrial net primary productivity (NPP) for parameterization, calibration, and validation of NPP models. The project (NASA Reference Number TE/99-0005) was funded by the National Aeronautics and Space Administration (NASA), Office of Earth Science, Terrestrial Ecology Program under Interagency Agreement number 2013-M164-A1, under

153

HRX-SAFT Equation of State for Fluid Mixtures:? Application to Binary Mixtures of Carbon Dioxide, Water, and Methanol  

Science Journals Connector (OSTI)

HRX-SAFT Equation of State for Fluid Mixtures:? Application to Binary Mixtures of Carbon Dioxide, Water, and Methanol ... In this work, we extend the pure fluid crossover statistical associating fluid theory (HRX-SAFT) equation of state (EOS) (Kiselev et al., Fluid Phase Equilib. ... HRX-SAFT incorporates non-analytic scaling laws in the critical region and is transformed into the analytical, classical HR-SAFT EOS far away from the critical point. ...

S. B. Kiselev; J. F. Ely; S. P. Tan; H. Adidharma; M. Radosz

2006-04-25T23:59:59.000Z

154

Consistent Deformed Bosonic Algebra in Noncommutative Quantum Mechanics  

E-Print Network [OSTI]

In two-dimensional noncommutive space for the case of both position - position and momentum - momentum noncommuting, the consistent deformed bosonic algebra at the non-perturbation level described by the deformed annihilation and creation operators is investigated. A general relation between noncommutative parameters is fixed from the consistency of the deformed Heisenberg - Weyl algebra with the deformed bosonic algebra. A Fock space is found, in which all calculations can be similarly developed as if in commutative space and all effects of spatial noncommutativity are simply represented by parameters.

Jian-Zu Zhang

2009-07-09T23:59:59.000Z

155

On thermodynamically consistent schemes for phase field equations  

E-Print Network [OSTI]

and at the phase change front. A somewhat different approach of Charach and Zemel [2] combines bal- ance equationsOn thermodynamically consistent schemes for phase field equations C. Charach and P. C. Fife thermodynamics. The principal applications are to the solidification of a pure material and of a binary alloy

Fife, Paul

156

Neutron skin of 208 Pb in consistency with  

E-Print Network [OSTI]

Neutron skin of 208 Pb in consistency with neutron star observations K. Miyazaki E-mail: miyazakiro as varying the neutron radius of 208Pb. The neutron skin thickness Sn is determined in the comparison with the astronomical observations of massive neutron stars (NSs), the standard scenario of NS cooling

157

Self-consistent modeling of charge redistributions in Josephson junctions  

E-Print Network [OSTI]

Self-consistent modeling of charge redistributions in Josephson junctions J. K. Freericks, Josephson Junction talk, 2000 #12;Josephson Proximity-Effect Junctions · A Superconductor-Normal metal, Georgetown University, Josephson Junction talk, 2000 S N S I I V V Ic #12;Andreev Bound States · At an N

Freericks, Jim

158

Self-consistent modeling of SINIS and SNSNS Josephson junctions  

E-Print Network [OSTI]

Self-consistent modeling of SINIS and SNSNS Josephson junctions J. K. Freericks Collaborators: Paul of Naval Research. J. K. Freericks, Georgetown University, Josephson Junction talk, 2000 #12;Josephson University, Josephson Junction talk, 2000 S I S I I V V Ic #12;Josephson Proximity-Effect Junctions

Freericks, Jim

159

Self-consistent methods in nuclear structure physics  

SciTech Connect (OSTI)

The authors present a very brief description of the Hartree Fock method in nuclear structure physics, discuss the numerical methods used to solve the self-consistent equations, and analyze the precision and convergence properties of solutions. As an application, they present results pertaining to quadrupole moments and single-particle quadrupole polarizations in superdeformed nuclei with A {approximately} 60.

Dobaczewski, J. [Warsaw Univ. (Poland). Inst. of Theoretical Physics][Oak Ridge National Lab., TN (United States). Joint Inst. for Heavy Ion Research]|[Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics

1997-11-01T23:59:59.000Z

160

Nonlinearly consistent schemes for coupled problems in reactor analysis  

E-Print Network [OSTI]

problems and the performance was analyzed for a 0-D and 1-D model. The results indicate that consistent approximations can be made to enhance the overall accuracy in conventional codes with such simple nonintrusive techniques. A detailed analysis of a...

Mahadevan, Vijay Subramaniam

2007-04-25T23:59:59.000Z

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


161

A nuclear Frechet space consisting of C -functions and  

E-Print Network [OSTI]

A nuclear Fr´echet space consisting of C -functions and failing the bounded approximation property Dietmar Vogt Abstract An easy and transparent example is given of a nuclear Fre´echet space failing of Grothendieck whether every nuclear Fr´echet space has the bounded approximation property was open for quite

Vogt, Dietmar

162

Size-consistent Brueckner theory limited to double substitutions  

Science Journals Connector (OSTI)

A size-consistent set of equations for electron correlation which are limited to double substitutions, based on Brueckner orbitals, is discussed. Called BD theory, it is shown that at fifth order of perturbation theory, BD incorporates more terms than CCSD and QCISD. The simplicity of the equations leads to an elegant gradient theory. Preliminary applications are reported.

Nicholas C. Handy; John A. Pople; Martin Head-Gordon; Krishnan Raghavachari; Gary W. Trucks

1989-01-01T23:59:59.000Z

163

A Programming Language Perspective on Transactional Memory Consistency  

E-Print Network [OSTI]

behavior, a variant of the well-known consistency condition of opacity is suf- ficient for observational-1-4503-2065-8/13/07 ...$15.00. node := new(StackNode); node.val := val; result := abort; while (result == abort) do { result yield simple code for pushing an element onto a stack represented as a singly-linked list: in this case

Gotsman, Alexey

164

Self-consistent scattering theory for the radiative transport equation  

E-Print Network [OSTI]

Self-consistent scattering theory for the radiative transport equation Arnold D. Kim School by the radiative transport equation. We present a theory for the transport equation with an inhomogeneous.5850. 1. INTRODUCTION The radiative transport equation governs light propaga- tion in random media

Kim, Arnold D.

165

A Distributed Arc-Consistency Algorithm T. Nguyen, Y. Deville  

E-Print Network [OSTI]

cient way of tackling constraint satisfaction problems (CSP). In particular, various arc and hardware design. Informally, a CSP is com- posed of a nite set of variables, each of which is taking values the variables can simultaneously take. Resolving a CSP consists in nding one or all complete assignments

Deville, Yves

166

A Generic ArcConsistency Algorithm and its Specializations 1  

E-Print Network [OSTI]

con­ straint satisfaction problems (CSP). In particular, various arc­consistency algorithms have been constraints) and d is the size of the largest domain. Being applicable to the whole class of (binary) CSP as constraint satisfaction problems (CSP). A CSP is defined by a finite set of variables taking values from

Deville, Yves

167

A Generic Arc-Consistency Algorithm and its Specializations1  

E-Print Network [OSTI]

satisfaction problems (CSP). In particular, various arc-consistency algorithms have been proposed, originating is the size of the largest domain. Being applicable to the whole class of (binary) CSP, these algorithms do satisfaction problems (CSP). A CSP is de ned by a nite set of variables taking values from nite domains

Deville, Yves

168

Charge lattices and consistency of 6D supergravity  

E-Print Network [OSTI]

We extend the known consistency conditions on the low-energy theory of six-dimensional N = 1 supergravity. We review some facts about the theory of two-form gauge fields and conclude that the charge lattice ? for such a ...

Seiberg, Nathan

169

View Consistency in Architectures for Cyber-Physical Systems  

Science Journals Connector (OSTI)

Current methods for modeling, analysis, and design of cyber-physical systems lack a unifying framework due to the complexity and heterogeneity of the constituent elements and their interactions. Our approach is to define relationships between system ... Keywords: system architecture, view consistency, graph morphism, multi-domain modeling, cyber-physical systems

Ajinkya Bhave; Bruce H. Krogh; David Garlan; Bradley Schmerl

2011-04-01T23:59:59.000Z

170

Thermodynamical Consistency of Excluded Volume Hadron Gas Models  

E-Print Network [OSTI]

The new excluded volume hadron gas model by Singh et al. [1-7] is critically discussed. We demonstrate that in this model the results obtained from relations between thermodynamical quantities disagree with the corresponding results obtained by statistical ensemble averaging. Thus, the model does not satisfy the requirements of thermodynamical consistency.

M. I. Gorenstein

2012-05-08T23:59:59.000Z

171

Consistent selection of the number of clusters via crossvalidation  

Science Journals Connector (OSTI)

......size of the validation set to increase as well. Yet, this restriction...curves for the iris (a), wine (b) and automobile (c) examples...longer appropriate to assess the quality of non-distance- based clusterings...and petal. The second is the wine example, which consists of......

Junhui Wang

2010-12-01T23:59:59.000Z

172

ON CONSISTENT FUSION OF MULTIMODAL BIOMETRICS Dept. of Electrical Engineering  

E-Print Network [OSTI]

ON CONSISTENT FUSION OF MULTIMODAL BIOMETRICS S. Y. Kung Dept. of Electrical Engineering Princeton University, USA Man-Wai Mak Dept. of Electronic and Information Engineering The Hong Kong Polytechnic University, Hong Kong SAR ABSTRACT Audio-visual (AV) biometrics offer complementary informa- tion sources

Mak, Man-Wai

173

Consistent Data Assimilation of Isotopes: 242Pu and 105Pd  

SciTech Connect (OSTI)

In this annual report we illustrate the methodology of the consistent data assimilation that allows to use the information coming from integral experiments for improving the basic nuclear parameters used in cross section evaluation. A series of integral experiments are analyzed using the EMPIRE evaluated files for 242Pu and 105Pd. In particular irradiation experiments (PROFIL-1 and -2, TRAPU-1, -2 and -3) provide information about capture cross sections, and a critical configuration, COSMO, where fission spectral indexes were measured, provides information about fission cross section. The observed discrepancies between calculated and experimental results are used in conjunction with the computed sensitivity coefficients and covariance matrix for nuclear parameters in a consistent data assimilation. The results obtained by the consistent data assimilation indicate that not so large modifications on some key identified nuclear parameters allow to obtain reasonable C/E. However, for some parameters such variations are outside the range of 1 s of their initial standard deviation. This can indicate a possible conflict between differential measurements (used to calculate the initial standard deviations) and the integral measurements used in the statistical data adjustment. Moreover, an inconsistency between the C/E of two sets of irradiation experiments (PROFIL and TRAPU) is observed for 242Pu. This is the end of this project funded by the Nuclear Physics Program of the DOE Office of Science. We can indicate that a proof of principle has been demonstrated for a few isotopes for this innovative methodology. However, we are still far from having explored all the possibilities and made this methodology to be considered proved and robust. In particular many issues are worth further investigation: Non-linear effects Flexibility of nuclear parameters in describing cross sections Multi-isotope consistent assimilation Consistency between differential and integral experiments

G. Palmiotti; H. Hiruta; M. Salvatores

2012-09-01T23:59:59.000Z

174

Leaching of mixtures of biochar and fly ash  

SciTech Connect (OSTI)

Increasing atmospheric levels of greenhouse gases, especially CO2, and their effects on global temperature have led to interest in the possibility of carbon storage in terrestrial environments. Both the residual char from biomass pyrolysis (biochar) and fly ash from coal combustion have the potential to significantly expand terrestrial sequestration options. Both biochar and fly ash also have potentially beneficial effects on soil properties. Fly ash has been shown to increase porosity, water-holding capacity, pH, conductivity, and dissolved SO42-, CO32-, Cl- and basic cations. Adding biochar to soil generally raises pH, increases total nitrogen and total phosphorous, encourages greater root development, improves cation exchange capacity and decreases available aluminum. A combination of these benefits likely is responsible for observed increases in yields for crops such as corn and sugarcane. In addition, it has been found that soils with added biochar emit lower amounts of other greenhouse gases (methane and nitrous oxide) than do unamended soils. Biochar and fly ash amendments may be useful in promoting terrestrial carbon sequestration on currently underutilized and degraded lands. For example, about 1% of the US surface lands consist of previously mined lands or highway rights-of-way. Poorly managed lands could count for another 15% of US area. Biochar and fly ash amendments could increase productivity of these lands and increase carbon storage in the soil. Previous results showed minimal leaching of organic carbon and metals from a variety of fly ashes. In the present study, we examined the properties of mixtures of biochar, fly ash, and soil and evaluated the leaching of organic carbon and metals from these mixtures. The carbon sorption experiments showed release of carbon from biochar, rather than sorption, except at the highest concentrations in the Biochar HW sample. Similar results were obtained by others for oxidative leaching of bituminous coal, in which more C was released as dissolved C than was oxidized to CO2 by the oxygen in water. We confirmed that both fly ash and two types of biochar (oak char [OKEB], and hardwood [HW] char) exhibited minimal leaching of heavy metals including Cr, Ni, Zn, Ga, and Ag, and no detectable leaching of Pb or Cd (data not shown) under the conditions tested. The Biochar HW had a slightly higher C/N ratio (334) and pH (7.7) than did the Biochar OKEB (284 and 6.5). There was no toxicity exhibited by the fly ash (not shown) or biochar leachates as measured by the Microtox assay under the conditions tested. In previous results no toxicity was reported in testing the fly ash samples except for one high-pH sample. The most notable leachate component from both types of biochar, but not the fly ash, was organic carbon with the HW biochar leaching less organic carbon than the OKEB biochar (5.71 ppm vs. 59.3 ppm). Alone (in batch sorption experiments), or in mixtures of 90% soil and 10% biochar (column studies), we noted significant loss of carbon from the biochar into soluble components. However, when we added fly ash to the column experiments (80% soil, 10% fly ash, and 10% biochar) we observed significant decreases in the amounts of C leached (20% for HW, and 47% for OKEB). The results indicate that applying a combination of fly ash and biochar may result in maximizing the amount of carbon sequestration in soil while also increasing beneficial soil properties and fertility. The lower amount of carbon leached from the HW biochar compared to the OKEB biochar is likely due to the more recalcitrant form of the carbon in the HW char, due to its preparation at a higher temperature (600 C) than the OKEB biochar (450 C). High heat treatment temperatures during biochar preparation increase both the total carbon content of the biochar and the proportion of the carbon that is present in fused aromatic rings resistant to chemical and physical degradation.

Palumbo, Anthony V.; Porat, Iris; Phillips, Jana R.; Amonette, James E.; Drake, Meghan M.; Brown, Steven D.; Schadt, Christopher W.

2009-06-22T23:59:59.000Z

175

Parameter consistency in multienergetic k?p models  

Science Journals Connector (OSTI)

Standard derivations of multiband k?p models rely on Lwdin perturbation theory. Close examination of this method, however, reveals that it is unsuitable for treating systems with multiple zeroth-order energies. As a result, various perturbation sums in multienergetic k?p models are not well defined, and a consistent set of k?p parameters cannot be guaranteed. We inspect this difficulty and present an alternative derivation of the k?p theory based on the method of infinitesimal basis transformations. This approach clearly demonstrates that a consistent k?p matrix can be generated from an arbitrary number of zeroth-order wave functions regardless of their energies. In addition, we obtain a corrected expression for off-diagonal perturbation sums. The expression is applied to give the corrected form for the asymmetric B parameter in the s-p-coupled zinc-blende k?p Hamiltonian.

John P. Loehr

1995-07-15T23:59:59.000Z

176

Consistency conditions for orientifolds and D-manifolds  

Science Journals Connector (OSTI)

We study superstrings with orientifold projections and with generalized open string boundary conditions (D branes). We find two types of consistency condition, one related to the algebra of Chan-Paton factors and the other to cancellation of divergences. One consequence is that the Dirichlet five branes of the type I theory carry a symplectic gauge group, as required by string duality. As another application we study the type I theory on a K3 Z2 orbifold, finding a family of consistent theories with various unitary and symplectic subgroups of U(16)U(16). We argue that the K3 orbifold with spin connection embedded in gauge connection corresponds to an interacting conformal field theory in the type I theory.

Eric G. Gimon and Joseph Polchinski

1996-07-15T23:59:59.000Z

177

Consistent metric combinations in cosmology of massive bigravity  

E-Print Network [OSTI]

Massive bigravity models are interesting alternatives to standard cosmology. In most cases however these models have been studied for a simplified scenario in which both metrics take homogeneous and isotropic forms (Friedmann-Lema\\^{i}tre-Robertson-Walker; FLRW) with the same spatial curvatures. The interest to consider more general geometries arises in particular in view of the difficulty so far encountered in building stable cosmological solutions with homogeneous and isotropic metrics. Here we consider a number of cases in which the two metrics take more general forms, namely FLRW with different spatial curvatures, Lema\\^{i}tre, Lema\\^{i}tre-Tolman-Bondi (LTB), and Bianchi I, as well as cases where only one metric is linearly perturbed. We discuss possible consistent combinations and find that only some special cases of FLRW-Lema\\^{i}tre, LTB-LTB and FLRW-Bianchi I combinations give consistent, non-trivial solutions.

Henrik Nersisyan; Yashar Akrami; Luca Amendola

2015-02-13T23:59:59.000Z

178

First Principles Investigations of Americium, Plutonium and their Mixtures using Dynamical Mean Field Theory  

SciTech Connect (OSTI)

We developed a relativistic dynamical mean field approach to study the properties of Plutonium Americium mixtures.

Gabriel Kotliar and Sergej Savrasov

2007-04-17T23:59:59.000Z

179

Consistent Bimetric Theory and its Application to Cosmology  

E-Print Network [OSTI]

Recently, the construction of ghost-free nonlinear massive spin-2 interactions solved a long outstanding problem in classical field theory. The consistent formulation requires a second rank-two tensor (or metric) and therefore has the form of a bimetric theory. Besides providing the solution to an old problem in field theory, ghost-free bimetric theory also has an interesting phenomenology: Its homogeneous and isotropic background solutions can reproduce the expansion history of the universe without any input of vacuum energy.

Angnis Schmidt-May

2014-05-12T23:59:59.000Z

180

Simulation of Relativistic Shocks and Associated Self-consistent Radiation  

SciTech Connect (OSTI)

We calculated radiation from electrons propagating in a uniform parallel magnetic field to verify our technique. We also used our new technique to calculate emission from electrons in small simulation systems with three different Lorentz factors and ambient parallel magnetic fields. We obtained spectra which are consistent with those generated by electrons propagating in turbulent magnetic fields, that are generated at an early nonlinear stage of the Weibel instability.

Nishikawa, K.-I.; Mizuno, Y. [National Space Science and Technology Center, Huntsville, AL 35805 (United States); Niemiec, J. [Institute of Nuclear Physics PAN, ul. Radzikowskiego 152, 31-342 Krakow (Poland); Medvedev, M. [Department of Physics and Astronomy, University of Kansas, KS 66045 (United States); Zhang, B. [Department of Physics, University of Nevada, Las Vegas, NV 89154 (United States); Hardee, P. [Department of Physics and Astronomy, The University of Alabama, Tuscaloosa, AL 35487 (United States); Nordlund, A ring .; Frederiksen, J. [Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen Oe (Denmark); Sol, H. [H. SolLUTH, Observatore de Paris-Meudon, 5 place Jules Jansen, 92195 Meudon Cedex (France); Pohl, M. [Institue of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Strasse 24/25 14476 Potsdam-Golm (Germany); Hartmann, D. H. [Department of Physics and Astronomy, Clemson University, Clemson, SC 29634 (United States); Fishman, G. J. [NASA/MSFC, Huntsville, AL 35805 (United States)

2010-10-15T23:59:59.000Z

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


181

Self-consistent full wave simulations of lower hybrid waves  

E-Print Network [OSTI]

Self-consistent full wave simulations of lower hybrid waves John C. Wright P. T. Bonoli - MIT E .J for Simulation of Wave-Plasma Interactions L.A. Berry, D.B. Batchelor, E.F. Jaeger, E. D`Azevedo D. Green C. Milanesio #12;3 Outline · Introduction to Lower Hybrid waves · Modeling LH waves ­ Ray tracing ­ Full Wave

Wright, John C.

182

Turbulence intensity pulse propagation with self-consistent nonlinear noise  

SciTech Connect (OSTI)

A model of turbulence intensity spreading with self-consistent nonlinear noise is derived systematically for the simple dynamical model of resistivity gradient driven turbulence. Local effective drive, thermal conduction damping, nonlinear coupling, and spatial scattering effects are included. As a consequence of nonlinear mode coupling processes (i.e., triad mode interactions), turbulence energy can be spatially scattered, leading to turbulence propagation and spreading. However, the range of any nonlinear mode interactions of the background with a test mode is restricted to within a few mode scale widths from the test mode rational surface. The speed of a turbulent spreading front is calculated. This front speed is effectively constant on macroscopic scales. We show that the effect of self-consistent nonlinear noise on the intensity front speed is modest, as a consequence of the ordering {Delta}{sub c}consistent mode coupling noise and ad hoc external noise are discussed. The broader implications of these results for turbulence front propagation are identified and explained.

Wang, Z. H. [School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China); Department of Physics and Center for Astrophysics and Space Sciences, University of California at San Diego, La Jolla, California 92093-0424 (United States); Diamond, P. H. [Department of Physics and Center for Astrophysics and Space Sciences, University of California at San Diego, La Jolla, California 92093-0424 (United States); WCI Center for Fusion Theory, National Fusion Research Institute, Gwahangno 113, Yuseong-gu, Daejeon 305-333 (Korea, Republic of); Guercan, Oe. D. [Laboratoire de Physique des Plasmas, Ecole Polytechnique-CNRS, 91128 Palaiseau Cedex (France); Garbet, X. [CEA, IRFM, F-13108 Saint Paul Lez Durance (France); Wang, X. G. [School of Physics, Peking University, Beijing 100871 (China)

2011-03-15T23:59:59.000Z

183

Detailed chemical characterization of unresolved complex mixtures in  

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

Detailed chemical characterization of unresolved complex mixtures in Detailed chemical characterization of unresolved complex mixtures in atmospheric organics: Insights into emission sources, atmospheric processing, and secondary organic aerosol formation Title Detailed chemical characterization of unresolved complex mixtures in atmospheric organics: Insights into emission sources, atmospheric processing, and secondary organic aerosol formation Publication Type Journal Article Year of Publication 2013 Authors Chan, Arthur W. H., Gabriel Isaacman, Kevin R. Wilson, David R. Worton, Christopher R. Ruehl, Theodora Nah, Drew R. Gentner, Timothy R. Dallmann, Thomas W. Kirchstetter, Robert A. Harley, Jessica B. Gilman, William C. Kuster, Joost A. de Gouw, John H. Offenberg, Tadeusz E. Kleindienst, Ying H. Lin, Caitlin L. Rubitschun, Jason D. Surratt, Patrick L. Hayes, Jose L. Jimenez, and Allen H. Goldstein

184

Nuclear fusion reaction rates for strongly coupled ionic mixtures  

SciTech Connect (OSTI)

We analyze the effect of plasma screening on nuclear reaction rates in dense matter composed of atomic nuclei of one or two types. We perform semiclassical calculations of the Coulomb barrier penetrability taking into account a radial mean-field potential of plasma ions. The mean-field potential is extracted from the results of extensive Monte Carlo calculations of radial pair distribution functions of ions in binary ionic mixtures. We calculate the reaction rates in a wide range of plasma parameters and approximate these rates by an analytical expression that is expected to be applicable to multicomponent ion mixtures. Also, we analyze Gamow-peak energies of reacting ions in various nuclear burning regimes. For illustration, we study nuclear burning in {sup 12}C-{sup 16}O mixtures.

Chugunov, A. I.; DeWitt, H. E. [Ioffe Physical-Technical Institute, Politekhnicheskaya 26, RU-194021 St. Petersburg (Russian Federation); Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

2009-07-15T23:59:59.000Z

185

Inferential determination of various properties of a gas mixture  

DOE Patents [OSTI]

Methods for inferentially determining various properties of a gas mixture, when the speed of sound in the gas is known at an arbitrary temperature and pressure. The method can be applied to natural gas mixtures, where the known parameters are the sound speed, temperature, pressure, and concentrations of any dilute components of the gas. The method uses a set of reference gases and their calculated density and speed of sound values to estimate the density of the subject gas. Additional calculations can be made to estimate the molecular weight of the subject gas, which can then be used as the basis for heating value calculations. The method may also be applied to inferentially determine density and molecular weight for gas mixtures other than natural gases.

Morrow, Thomas B. (San Antonio, TX); Behring, II, Kendricks A. (Torrance, CA)

2007-03-27T23:59:59.000Z

186

Determining the Porosity and Saturated Hydraulic Conductivity of Binary Mixtures  

SciTech Connect (OSTI)

Gravels and coarse sands make up significant portions of some environmentally important sediments, while the hydraulic properties of the sediments are typically obtained in the laboratory using only the fine fraction (e.g., <2 mm or 4.75 mm). Researchers have found that the content of gravel has significant impacts on the hydraulic properties of the bulk soils. Laboratory experiments were conducted to measure the porosity and the saturated hydraulic conductivity of binary mixtures with different fractions of coarse and fine components. We proposed a mixing-coefficient model to estimate the porosity and a power-averaging method to determine the effective particle diameter and further to predict the saturated hydraulic conductivity of binary mixtures. The proposed methods could well estimate the porosity and saturated hydraulic conductivity of the binary mixtures for the full range of gravel contents and was successfully applied to two data sets in the literature.

Zhang, Z. F.; Ward, Anderson L.; Keller, Jason M.

2009-09-27T23:59:59.000Z

187

A Molecular-Thermodynamic Lattice Model for Binary Mixtures  

SciTech Connect (OSTI)

Using a method originally proposed for describing a continuum-space polymer fluid, a new expression for the Helmholtz energy of mixing is proposed for a binary lattice mixture. Molecular size asymmetry and nonrandomness due to segment-segment interactions are taken into account. An expression proposed by Yan, Liu and Hu for a binary lattice mixture of monomers, based on the Ising model, is used as a reference system. Calculated critical constants and liquid-liquid coexistence curves are in good agreement with Monte Carlo simulations for lattice mixtures with modest size asymmetry. Because lattice spacing rises with increasing temperature, comparison of calculated binary liquid-liquid equilibria with experiment requires that calculations take into account that the interchange energy falls as temperature rises. While the new expression for the Helmholtz energy of mixing provides much improvement over the Flory-Huggins equation, calculated liquid-liquid equilibria for three binary systems are similar to those from Guggenheim's quasi-chemical theory.

Qin, Yuan; Prausnitz, John M.

2005-04-29T23:59:59.000Z

188

Vacancy solution theory of adsorption from gas mixtures  

SciTech Connect (OSTI)

The new correlation based on vacancy-solution theory, reports Pennsylvania State University, improves predictions of gas-mixture adsorption equilibria from single-component adsorption isotherm data. The new method is more general, simpler to apply, and more accurate than other available models. For an adsorption system, the binary parameters - adsorbate and vacancy - are obtained from regression of the pure-gas adsorption data with the vacancy-solution isotherm equation. These parameters are then used to predict multicomponent adsorption equilibrium, assuming that the adsorbate-adsorbate interactions are negligible. Penn State has verified the new correlation on two different kinds of binary adsorption systems: mixtures of O/sub 2/, N/sub 2/, and CO on zeolite 10X and mixtures of light hydrocarbons on Nuxit-AL activated carbon.

Suwanayuen, S.; Danner, R.P.

1980-01-01T23:59:59.000Z

189

Chemical kinetic modeling of component mixtures relevant to gasoline  

SciTech Connect (OSTI)

Real fuels are complex mixtures of thousands of hydrocarbon compounds including linear and branched paraffins, naphthenes, olefins and aromatics. It is generally agreed that their behavior can be effectively reproduced by simpler fuel surrogates containing a limited number of components. In this work, a recently revised version of the kinetic model by the authors is used to analyze the combustion behavior of several components relevant to gasoline surrogate formulation. Particular attention is devoted to linear and branched saturated hydrocarbons (PRF mixtures), olefins (1-hexene) and aromatics (toluene). Model predictions for pure components, binary mixtures and multi-component gasoline surrogates are compared with recent experimental information collected in rapid compression machine, shock tube and jet stirred reactors covering a wide range of conditions pertinent to internal combustion engines. Simulation results are discussed focusing attention on the mixing effects of the fuel components.

Mehl, M; Curran, H J; Pitz, W J; Westbrook, C K

2009-02-13T23:59:59.000Z

190

Enskog theory for polydisperse granular mixtures. II. Sonine polynomial approximation  

Science Journals Connector (OSTI)

The linear integral equations defining the Navier-Stokes (NS) transport coefficients for polydisperse granular mixtures of smooth inelastic hard disks or spheres are solved by using the leading terms in a Sonine polynomial expansion. Explicit expressions for all the NS transport coefficients are given in terms of the sizes, masses, compositions, density, and restitution coefficients. In addition, the cooling rate is also evaluated to first order in the gradients. The results hold for arbitrary degree of inelasticity and are not limited to specific values of the parameters of the mixture. Finally, a detailed comparison between the derivation of the current theory and previous theories for mixtures is made, with attention paid to the implication of the various treatments employed to date.

Vicente Garz; Christine M. Hrenya; James W. Dufty

2007-09-10T23:59:59.000Z

191

Chemical kinetic modeling of component mixtures relevant to gasoline  

SciTech Connect (OSTI)

Detailed kinetic models of pyrolysis and combustion of hydrocarbon fuels are nowadays widely used in the design of internal combustion engines and these models are effectively applied to help meet the increasingly stringent environmental and energetic standards. In previous studies by the combustion community, such models not only contributed to the understanding of pure component combustion, but also provided a deeper insight into the combustion behavior of complex mixtures. One of the major challenges in this field is now the definition and the development of appropriate surrogate models able to mimic the actual features of real fuels. Real fuels are complex mixtures of thousands of hydrocarbon compounds including linear and branched paraffins, naphthenes, olefins and aromatics. Their behavior can be effectively reproduced by simpler fuel surrogates containing a limited number of components. Aside the most commonly used surrogates containing iso-octane and n-heptane only, the so called Primary Reference Fuels (PRF), new mixtures have recently been suggested to extend the reference components in surrogate mixtures to also include alkenes and aromatics. It is generally agreed that, including representative species for all the main classes of hydrocarbons which can be found in real fuels, it is possible to reproduce very effectively in a wide range of operating conditions not just the auto-ignition propensity of gasoline or Diesel fuels, but also their physical properties and their combustion residuals [1]. In this work, the combustion behavior of several components relevant to gasoline surrogate formulation is computationally examined. The attention is focused on the autoignition of iso-octane, hexene and their mixtures. Some important issues relevant to the experimental and modeling investigation of such fuels are discussed with the help of rapid compression machine data and calculations. Following the model validation, the behavior of mixtures is discussed on the basis of computational results.

Mehl, M; Curran, H J; Pitz, W J; Dooley, S; Westbrook, C K

2008-05-29T23:59:59.000Z

192

The Boussinesq equation with self-consistent sources  

Science Journals Connector (OSTI)

The Boussinesq equation with self-consistent sources (BESCSs) and its related linear system are derived for the first time. The Darboux transformation for the adjoint Lax pairs of the Boussinesq equation is also constructed. Starting from the solutions of the Boussinesq equation and the corresponding eigenfunctions obtained by the Darboux transformation, the method of variation of constant is applied to solve BESCS. By this method, we construct N-soliton, N-negaton, N-positon and collapse solutions for BESCSs. In addition, the interaction of two solitons is studied in detail.

Hongxia Wu; Yunbo Zeng; Tianyou Fan

2008-01-01T23:59:59.000Z

193

Testing the consistency between cosmological measurements of distance and age  

E-Print Network [OSTI]

We present a model independent method to test the consistency between cosmological measurements of distance and age, assuming the distance duality relation. We use type Ia supernovae, baryon acoustic oscillations, and observational Hubble data, to reconstruct the luminosity distance D_L(z), the angle averaged distance D_V(z) and the Hubble rate H(z), using Gaussian processes regression technique. We obtain estimate of the distance duality relation in the redshift range 0.1

Nair, Remya; Jain, Deepak

2015-01-01T23:59:59.000Z

194

Multi-wavelength constraints on the inflationary consistency relation  

E-Print Network [OSTI]

We present the first attempt to use a combination of CMB, LIGO, and PPTA data to constrain both the tilt and the running of primordial tensor power spectrum through constraints on the gravitational wave energy density generated in the early universe. Combining measurements at different cosmological scales highlights how complementary data can be used to test the predictions of early universe models including the inflationary consistency relation. Current data prefers a slightly positive tilt ($n_t = 0.13^{+0.54}_{-0.75}$) and a negative running ($n_{t, {\\rm run}} assumptions regarding the UV cutoff ($k_{\\...

Meerburg, P Daniel; Hadzhiyska, Boryana; Meyers, Joel

2015-01-01T23:59:59.000Z

195

Properties of a consistent Lorentz-violating Abelian gauge theory  

SciTech Connect (OSTI)

A Lorentz-violating modification of massless QED is proposed, with higher-order space derivatives for the photon field. The fermion dynamical mass generation is studied with the Schwinger-Dyson approach. Perturbative properties of the model are calculated at one-loop and discussed at higher-order loops, showing the consistency of the model. We explain that there is no contradiction with the definition of the speed of light c, although fermions see an effective light cone, with a maximum speed smaller than c.

Alexandre, J.; Vergou, A. [King's College London, Department of Physics, London WC2R 2LS (United Kingdom)

2011-06-15T23:59:59.000Z

196

Consistency of FMEA used in the validation of analytical procedures  

Science Journals Connector (OSTI)

In order to explore the consistency of the outcome of a Failure Mode and Effects Analysis (FMEA) in the validation of analytical procedures, an FMEA was carried out by two different teams. The two teams applied two separate \\{FMEAs\\} to a High Performance Liquid ChromatographyDiode Array DetectionMass Spectrometry (HPLCDADMS) analytical procedure used in the quality control of medicines. Each team was free to define their own ranking scales for the probability of severity (S), occurrence (O), and detection (D) of failure modes. We calculated Risk Priority Numbers (RPNs) and we identified the failure modes above the 90th percentile of RPN values as failure modes needing urgent corrective action; failure modes falling between the 75th and 90th percentile of RPN values were identified as failure modes needing necessary corrective action, respectively. Team 1 and Team 2 identified five and six failure modes needing urgent corrective action respectively, with two being commonly identified. Of the failure modes needing necessary corrective actions, about a third were commonly identified by both teams. These results show inconsistency in the outcome of the FMEA. To improve consistency, we recommend that FMEA is always carried out under the supervision of an experienced FMEA-facilitator and that the FMEA team has at least two members with competence in the analytical method to be validated. However, the \\{FMEAs\\} of both teams contained valuable information that was not identified by the other team, indicating that this inconsistency is not always a drawback.

M.T. Oldenhof; J.F. van Leeuwen; M.J. Nauta; D. de Kaste; Y.M.C.F. Odekerken-Rombouts; M.J. Vredenbregt; M. Weda; D.M. Barends

2011-01-01T23:59:59.000Z

197

Parton distributions based on a maximally consistent dataset  

E-Print Network [OSTI]

The choice of data that enters a global QCD analysis can have a substantial impact on the resulting parton distributions and their predictions for collider observables. One of the main reasons for this has to do with the possible presence of inconsistencies, either internal within an experiment or external between different experiments. In order to assess the robustness of the global fit, different definitions of a conservative PDF set, that is, a PDF set based on a maximally consistent dataset, have been introduced. However, these approaches are typically affected by theory biases in the selection of the dataset. In this contribution, after a brief overview of recent NNPDF developments, we propose a new, fully objective, definition of a conservative PDF set, based on the Bayesian reweighting approach. Using the new NNPDF3.0 framework, we produce various conservative sets, which turn out to be mutually in agreement within the respective PDF uncertainties, as well as with the global fit. We explore some of their implications for LHC phenomenology, finding also good consistency with the global fit result. These results provide a non-trivial validation test of the new NNPDF3.0 fitting methodology, and indicate that possible inconsistencies in the fitted dataset do not affect substantially the global fit PDFs.

Juan Rojo

2014-09-10T23:59:59.000Z

198

Surface Tension of Electrolyte Solutions: A Self-consistent Theory  

E-Print Network [OSTI]

We study the surface tension of electrolyte solutions at the air/water and oil/water interfaces. Employing field-theoretical methods and considering short-range interactions of anions with the surface, we expand the Helmholtz free energy to first-order in a loop expansion and calculate the excess surface tension. Our approach is self-consistent and yields an analytical prediction that reunites the Onsager-Samaras pioneering result (which does not agree with experimental data), with the ionic specificity of the Hofmeister series. We obtain analytically the surface-tension dependence on the ionic strength, ionic size and ion-surface interaction, and show consequently that the Onsager-Samaras result is consistent with the one-loop correction beyond the mean-field result. Our theory fits well a wide range of concentrations for different salts using one fit parameter, reproducing the reverse Hofmeister series for anions at the air/water and oil/water interfaces.10.1029

Tomer Markovich; David Andelman; Rudi Podgornik

2014-04-09T23:59:59.000Z

199

Water addition for increased CO/H[sub 2] hydrocarbon synthesis activity over catalysts comprising cobalt, ruthenium and mixtures thereof which may include a promoter metal  

SciTech Connect (OSTI)

A once-through, fixed or slurry bed Fischer Tropsch process is described with enhanced CO conversion activity and C[sub 5] + liquid hydrocarbon selectivity comprising contacting a feed mixture of carbon monoxide and hydrogen in a reaction zone with about 1 Vol % to about 70 Vol % water based on the total volume of feed mixture, at a pressure above one atmosphere and a temperature ranging from about 150 C to about 300 C, with a catalyst selected from the group consisting of cobalt, ruthenium, and mixtures thereof on a titania support, wherein said titania support is less than 40 m[sup 2]/g, converting at least 90 Vol % of the carbon monoxide to liquid hydrocarbons, and in the substantial absence of CO[sub 2] formation.

Kim, C.J.

1993-07-13T23:59:59.000Z

200

CFD Modelling of Particle Mixtures in a 2D CFB  

Science Journals Connector (OSTI)

The capability of Fluent 6.2.16 to simulate particle mixtures in a laboratory scale 2D circulating fluidized bed (CFB) unit has been tested. In the ... 40 cm wide and 3 m high 2D CFB was modeled using a grid with...

M. Seppl; S. Kallio

2010-01-01T23:59:59.000Z

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


201

Gas-phase detonation propagation in mixture composition gradients  

Science Journals Connector (OSTI)

...unconfined gas detonations in hydrocarbon-air mixtures by a sympathetic...Meeting (International) of the Combustion Institute, Bordeaux, France...and A. Linan1995Effects of heat release on triple flamesPhys...model for partially premixed hydrocarbon combustionCombust. Flame...

2012-01-01T23:59:59.000Z

202

Viscosity of concentrated suspensions of sphere/rod mixtures  

SciTech Connect (OSTI)

This paper discusses the viscosity of concentrated suspensions of sphere/rod mixtures by adopting the Thomas relations for spheres and Milliken`s for randomly oriented rods with aspect ratio of 20. The relative viscosity of a mixed suspension may now be calculated for any combination of rods (of aspect ratio 20) and spheres.

Mor, R.; Gottlieb, M. [Ben-Gurion Univ. of the Negev, Beersheba (Israel). Dept. of Chemical Engineering; Graham, A.L. [Los Alamos National Lab., NM (United States); Mondy, L.A.

1996-05-01T23:59:59.000Z

203

Addendum to Heat and matter transport in binary liquid mixtures  

Science Journals Connector (OSTI)

We recently presented nonequilibrium molecular dynamics simulations of coupled heat and matter transport in a binary liquid mixture. While these simulations were carried out exactly as indicated, the relations given between the microscopic and macroscopic formalism were strictly wrong. Here we correct these errors and indicate how they limit the possibilities for comparison of our simulation results with experiment.

Denis J. Evans and David MacGowan

1987-07-15T23:59:59.000Z

204

Gas Distribution Modeling using Sparse Gaussian Process Mixture Models  

E-Print Network [OSTI]

Gas Distribution Modeling using Sparse Gaussian Process Mixture Models Cyrill Stachniss1 Christian-- In this paper, we consider the problem of learning a two dimensional spatial model of a gas distribution with a mobile robot. Building maps that can be used to accurately predict the gas concentration at query

Stachniss, Cyrill

205

Analysis of Closed Multivessel Batch Distillation of Ternary Azeotropic Mixtures  

E-Print Network [OSTI]

Analysis of Closed Multivessel Batch Distillation of Ternary Azeotropic Mixtures using Elementary ­ Introducing the concept of elementary topological cells, we illustrate how vapor­liquid equilibrium (VLE with total reflux packed distillation column profiles when all resistance to mass transfer is in the vapor

Skogestad, Sigurd

206

Variational Bayes for Hierarchical Mixture Models , James G. Booth  

E-Print Network [OSTI]

Bayesian inference for graphical models with latent variables (Bishop, 1999; Attias, 2000; Beal, 2003, and their mixtures, for model learning (Bishop, 1999; Ghahramani and Beal, 2000; Bishop et al., 2002; Beal, 2003 methods for Bayesian inference (Beal, 2003; Bishop, 2006; Ormerod and Wand, 2010). Posterior means

Booth, James

207

Interfaces in partly compatible polymer mixtures: A Monte Carlo simulation approach  

E-Print Network [OSTI]

The structure of polymer coils near interfaces between coexisting phases of symmetrical polymer mixtures (AB) is discussed, as well as the structure of symmetric diblock copolymers of the same chain length N adsorbed at the interface. The problem is studied by Monte Carlo simulations of the bond fluctuation model on the simple cubic lattice, using massively parallel computers (CRAY T3D). While homopolymer coils in the strong segregation limit are oriented parallel to the interface, the diblocks form ``dumbbells'' oriented perpendicular to the interface. However, in the dilute case (``mushroom regime'' rather than ``brush regime''), the diblocks are only weakly stretched. Distribution functions for monomers at the chain ends and in the center of the polymer are obtained, and a comparison to the self consistent field theory is made.

K. Binder; M. Mueller; F. Schmid; A. Werner

1997-06-27T23:59:59.000Z

208

Reflection of electromagnetic waves from mixtures of plane gravitational and scalar waves  

E-Print Network [OSTI]

We consider colliding wave packets consisting of hybrid mixtures of electromagnetic, gravitational and scalar waves. Irrespective of the scalar field, the electromagnetic wave still reflects from the gravitational wave. Some reflection processes are given for different choice of packets in which the Coulomb-like component $\\Psi_2$ vanishes. Exact solution for multiple reflection of an electromagnetic wave from successive impulsive gravitational waves is obtained in a closed form. It is shown that a succesive sign flip in the Maxwell spinor arises as a result of encountering with an impulsive train (i.e. the Dirac's comb curvature) of gravitational waves. Such an observable effect may be helpful in the detection of gravitational wave bursts.

Ozay Gurtug; Mustafa Halilsoy; Ozlem Unver

2006-08-22T23:59:59.000Z

209

Consistent Gravitationally-Coupled Spin-2 Field Theory  

E-Print Network [OSTI]

Inspired by the translational gauge structure of teleparallel gravity, the theory for a fundamental massless spin-2 field is constructed. Accordingly, instead of being represented by a symmetric second-rank tensor, the fundamental spin-2 field is assumed to be represented by a spacetime (world) vector field assuming values in the Lie algebra of the translation group. The flat-space theory naturally emerges in the Fierz formalism and is found to be equivalent to the usual metric-based theory. However, the gravitationally coupled theory, with gravitation itself described by teleparallel gravity, is shown not to present the consistency problems of the spin-2 theory constructed on the basis of general relativity.

H. I. Arcos; Tiago Gribl Lucas; J. G. Pereira

2010-05-05T23:59:59.000Z

210

On Consistent Kinetic and Derivative Interactions for Gravitons  

E-Print Network [OSTI]

The only known fully ghost-free and consistent Lorentz-invariant kinetic term for a graviton (or indeed for any spin-2 field) is the Einstein-Hilbert term. Here we propose and investigate a new family of candidate kinetic interactions and their extensions to derivative interactions involving several spin-2 fields. These new terms generically break diffeomorphism invariance(s) and as a result can lead to the propagation of 5 degrees of freedom for a single spin-2 field - analogous to ghost-free Massive Gravity. We discuss under what circumstances these new terms can be used to build healthy effective field theories and in the process establish the `Jordan' and `Einstein' frame pictures for Massive-, Bi- and Multi-Gravity.

Noller, Johannes

2014-01-01T23:59:59.000Z

211

On Consistent Kinetic and Derivative Interactions for Gravitons  

E-Print Network [OSTI]

The only known fully ghost-free and consistent Lorentz-invariant kinetic term for a graviton (or indeed for any spin-2 field) is the Einstein-Hilbert term. Here we propose and investigate a new family of candidate kinetic interactions and their extensions to derivative interactions involving several spin-2 fields. These new terms generically break diffeomorphism invariance(s) and as a result can lead to the propagation of 5 degrees of freedom for a single spin-2 field - analogous to ghost-free Massive Gravity. We discuss under what circumstances these new terms can be used to build healthy effective field theories and in the process establish the `Jordan' and `Einstein' frame pictures for Massive-, Bi- and Multi-Gravity.

Johannes Noller

2014-09-26T23:59:59.000Z

212

Consistency condition for inflation from (broken) conformal symmetry  

SciTech Connect (OSTI)

We investigate the symmetry constraints on the bispectrum, i.e. the three-point correlation function of primordial density fluctuations, in slow-roll inflation. It follows from the defining property of slow-roll inflation that primordial correlation functions inherit most of their structure from weakly broken de Sitter symmetries. Using holographic techniques borrowed from the AdS/CFT correspondence, the symmetry constraints on the bispectrum can be mapped to a set of stress-tensor Ward identities in a weakly broken 2+1-dimensional Euclidean CFT. We construct the consistency condition from these Ward identities using conformal perturbation theory. This requires a second order Ward identity and the use of the evolution equation. Our result also illustrates a subtle difference between conformal perturbation theory and the slow-roll expansion.

Schalm, Koenraad; Aalst, Ted van der [Instituut-Lorentz for Theoretical Physics, Universiteit Leiden, Niels Bohrweg 2, Leiden (Netherlands); Shiu, Gary, E-mail: kschalm@lorentz.leidenuniv.nl, E-mail: shiu@physics.wisc.edu, E-mail: vdaalst@lorentz.leidenuniv.nl [Department of Physics, University of Wisconsin-Madison, Madison, WI 53706 (United States)

2013-03-01T23:59:59.000Z

213

Consistent description of kinetic equation with triangle anomaly  

SciTech Connect (OSTI)

We provide a consistent description of the kinetic equation with a triangle anomaly which is compatible with the entropy principle of the second law of thermodynamics and the charge/energy-momentum conservation equations. In general an anomalous source term is necessary to ensure that the equations for the charge and energy-momentum conservation are satisfied and that the correction terms of distribution functions are compatible to these equations. The constraining equations from the entropy principle are derived for the anomaly-induced leading order corrections to the particle distribution functions. The correction terms can be determined for the minimum number of unknown coefficients in one charge and two charge cases by solving the constraining equations.

Pu Shi; Gao Jianhua; Wang Qun [Interdisciplinary Center for Theoretical Study and Department of Modern Physics, University of Science and Technology of China, Hefei 230026 (China)

2011-05-01T23:59:59.000Z

214

ER=EPR, GHZ, and the Consistency of Quantum Measurements  

E-Print Network [OSTI]

This paper illustrates various aspects of the ER=EPR conjecture.It begins with a brief heuristic argument, using the Ryu-Takayanagi correspondence, for why entanglement between black holes implies the existence of Einstein-Rosen bridges. The main part of the paper addresses a fundamental question: Is ER=EPR consistent with the standard postulates of quantum mechanics? Naively it seems to lead to an inconsistency between observations made on entangled systems by different observers. The resolution of the paradox lies in the properties of multiple black holes, entangled in the Greenberger-Horne-Zeilinger pattern. The last part of the paper is about entanglement as a resource for quantum communication. ER=EPR provides a way to visualize protocols like quantum teleportation. In some sense teleportation takes place through the wormhole, but as usual, classical communication is necessary to complete the protocol.

Leonard Susskind

2014-12-29T23:59:59.000Z

215

ER=EPR, GHZ, and the Consistency of Quantum Measurements  

E-Print Network [OSTI]

This paper illustrates various aspects of the ER=EPR conjecture.It begins with a brief heuristic argument, using the Ryu-Takayanagi correspondence, for why entanglement between black holes implies the existence of Einstein-Rosen bridges. The main part of the paper addresses a fundamental question: Is ER=EPR consistent with the standard postulates of quantum mechanics? Naively it seems to lead to an inconsistency between observations made on entangled systems by different observers. The resolution of the paradox lies in the properties of multiple black holes, entangled in the Greenberger-Horne-Zeilinger pattern. The last part of the paper is about entanglement as a resource for quantum communication. ER=EPR provides a way to visualize protocols like quantum teleportation. In some sense teleportation takes place through the wormhole, but as usual, classical communication is necessary to complete the protocol.

Susskind, Leonard

2014-01-01T23:59:59.000Z

216

VLE MEASUREMENTS FOR ASYMMETRIC MIXTURES OF FISCHER-TROPSCH HYDROCARBONS  

SciTech Connect (OSTI)

The ability to model the thermodynamic phase behavior of long-chain and short-chain alkane mixtures is of considerable industrial and theoretical interest. However, attempts to accurately describe the phase behavior of what we call asymmetric mixtures of hydrocarbons (AMoHs) have met with only limited success. Vapor-liquid equilibrium (VLE) data are surprisingly scarce, and the limited data that are available suggest that cubic equations of state may not be capable of fitting (much less predicting) the phase behavior of AMoHs. The following tasks, which address the problems described above, were accomplished during the one-year period of this Phase I UCR grant: (1) A continuous-flow apparatus was modified for the measurement of AMoHs and used to measure VLE for propane + hexadecane mixtures at temperatures from 473 to 626 K and pressures up to the mixture critical pressures of about 100 bar. (2) The extent to which cubic vs. modern, statistical mechanics-based equations of state (EoS) are applicable to AMoHs was evaluated. Peng-Robinson (PR) was found to be a surprisingly accurate equation for fitting AMoHs, but only if its pure component parameters were regressed to liquid densities and vapor pressures. However, even this form of PR was still not a predictive equation, as there was a significant variation of kij with temperature. In spite of its deficiencies in terms of vapor-phase predictions and modeling of the critical region, PC-SAFT was found to be the most appropriate EoS for truly predicting the phase behavior of highly asymmetric mixtures of alkanes. (3) Finally, a dense-gas extraction (DGE) apparatus was designed and constructed for the fractionation of F-T waxes into cuts of pure oligomers. Such oligomers are needed in g-sized quantities to perform VLE measurements with long-chain alkanes with carbon numbers greater than 40. The dense gas and the solute mixture to be extracted are contacted in a packed column that has a separation power significantly greater than what can be achieved in one equilibrium stage. Thus, wax oligomer purities are expected to be much better than what can be obtained by conventional supercritical extraction processes.

Mark C. Thies

2004-01-12T23:59:59.000Z

217

First principles molecular dynamics without self-consistent field optimization  

SciTech Connect (OSTI)

We present a first principles molecular dynamics approach that is based on time-reversible extended Lagrangian Born-Oppenheimer molecular dynamics [A. M. N. Niklasson, Phys. Rev. Lett. 100, 123004 (2008)] in the limit of vanishing self-consistent field optimization. The optimization-free dynamics keeps the computational cost to a minimum and typically provides molecular trajectories that closely follow the exact Born-Oppenheimer potential energy surface. Only one single diagonalization and Hamiltonian (or Fockian) construction are required in each integration time step. The proposed dynamics is derived for a general free-energy potential surface valid at finite electronic temperatures within hybrid density functional theory. Even in the event of irregular functional behavior that may cause a dynamical instability, the optimization-free limit represents a natural starting guess for force calculations that may require a more elaborate iterative electronic ground state optimization. Our optimization-free dynamics thus represents a flexible theoretical framework for a broad and general class of ab initio molecular dynamics simulations.

Souvatzis, Petros, E-mail: petros.souvatsiz@fysik.uu.se [Department of Physics and Astronomy, Division of Materials Theory, Uppsala University, Box 516, SE-75120 Uppsala (Sweden)] [Department of Physics and Astronomy, Division of Materials Theory, Uppsala University, Box 516, SE-75120 Uppsala (Sweden); Niklasson, Anders M. N., E-mail: amn@lanl.gov [Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)] [Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

2014-01-28T23:59:59.000Z

218

Surface studies of coal, oil, and coal-oil-mixture ash using auger electron spectroscopy and solvent leaching techniques  

SciTech Connect (OSTI)

Fly ash produced by the combustion of coal, oil, and a coal-oil mixture have been studied by Auger electron spectroscopy and solvent leaching techniques. The Auger data indicate that the surface concentration of the metal ions Na, Fe, Mg, Ni, V, and Al as well as S and C increases on going from coal to coal-oil mixture and oil ash. The relative surface enrichments of oil and coal-oil-mixture ash are consistent with a simple model of the ash-formation process, and the results confirm that several toxic metals are significantly enriched on the surface of the ash particles. The Auger data are compared to HCl and tris buffer leachate composition analyses, and in neither case does the leachate give an accurate representation of the surface composition. HCl apparently dissolves large oxide deposits and thus overestimates the surface concentrations of Fe, Al, and V. Conversely, several metallic ions are essentially insoluble in neutral aqueous solutions, so their surface concentration is underestimated by the tris leachate.

Stinespring, C.D.; Harris, W.R.; Cook, J.M.; Casleton, K.H.

1985-09-01T23:59:59.000Z

219

The structure and properties of a simple model mixture of amphiphilic molecules and ions at a solid surface  

SciTech Connect (OSTI)

We investigate microscopic structure, adsorption, and electric properties of a mixture that consists of amphiphilic molecules and charged hard spheres in contact with uncharged or charged solid surfaces. The amphiphilic molecules are modeled as spheres composed of attractive and repulsive parts. The electrolyte component of the mixture is considered in the framework of the restricted primitive model (RPM). The system is studied using a density functional theory that combines fundamental measure theory for hard sphere mixtures, weighted density approach for inhomogeneous charged hard spheres, and a mean-field approximation to describe anisotropic interactions. Our principal focus is in exploring the effects brought by the presence of ions on the distribution of amphiphilic particles at the wall, as well as the effects of amphiphilic molecules on the electric double layer formed at solid surface. In particular, we have found that under certain thermodynamic conditions a long-range translational and orientational order can develop. The presence of amphiphiles produces changes of the shape of the differential capacitance from symmetric or non-symmetric bell-like to camel-like. Moreover, for some systems the value of the potential of the zero charge is non-zero, in contrast to the RPM at a charged surface.

Pizio, O., E-mail: pizio@unam.mx [Instituto de Qumica, Universidad Nacional Autonoma de Mxico, Circuito Exterior, Ciudad Universitaria, 04510 Mxico, D.F. (Mexico); Soko?owski, S., E-mail: stefan.sokolowski@gmail.com [Department for the Modeling of Physico-Chemical Processes, Maria Curie-Sk?odowska University, 20-031 Lublin (Poland); Soko?owska, Z. [Institute of Agrophysics, Polish Academy of Sciences, Do?wiadczalna 4, 20-290 Lublin (Poland)] [Institute of Agrophysics, Polish Academy of Sciences, Do?wiadczalna 4, 20-290 Lublin (Poland)

2014-05-07T23:59:59.000Z

220

Power mixture and green body for producing silicon nitride base & articles of high fracture toughness and strength  

DOE Patents [OSTI]

A powder mixture and a green body for producing a silicon nitride-based article of improved fracture toughness and strength. The powder mixture includes 9a) a bimodal silicon nitride powder blend consisting essentially of about 10-30% by weight of a first silicon mitride powder of an average particle size of about 0.2 .mu.m and a surface area of about 8-12m.sup.2 g, and about 70-90% by weight of a second silicon nitride powder of an average particle size of about 0.4-0.6 .mu.m and a surface area of about 2-4 m.sup.2 /g, (b) about 10-50 percent by volume, based on the volume of the densified article, of refractory whiskers or fibers having an aspect ratio of about 3-150 and having an equivalent diameter selected to produce in the densified articel an equivalent diameter ratio of the whiskers or fibers to grains of silicon nitride of greater than 1.0, and (c) an effective amount of a suitable oxide densification aid. The green body is formed from the powder mixture, an effective amount of a suitable oxide densification aid, and an effective amount of a suitable organic binder.

Huckabee, Marvin L. (Marlboro, MA); Buljan, Sergej-Tomislav (Acton, MA); Neil, Jeffrey T. (Acton, MA)

1991-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "mixture consisting primarily" from the National Library of EnergyBeta (NLEBeta).
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We encourage you to perform a real-time search of NLEBeta
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221

Power mixture and green body for producing silicon nitride base articles of high fracture toughness and strength  

DOE Patents [OSTI]

A powder mixture and a green body for producing a silicon nitride-based article of improved fracture toughness and strength are disclosed. The powder mixture includes (a) a bimodal silicon nitride powder blend consisting essentially of about 10-30% by weight of a first silicon nitride powder of an average particle size of about 0.2 [mu]m and a surface area of about 8-12m[sup 2]g, and about 70-90% by weight of a second silicon nitride powder of an average particle size of about 0.4-0.6 [mu]m and a surface area of about 2-4 m[sup 2]/g, (b) about 10-50 percent by volume, based on the volume of the densified article, of refractory whiskers or fibers having an aspect ratio of about 3-150 and having an equivalent diameter selected to produce in the densified article an equivalent diameter ratio of the whiskers or fibers to grains of silicon nitride of greater than 1.0, and (c) an effective amount of a suitable oxide densification aid. The green body is formed from the powder mixture, an effective amount of a suitable oxide densification aid, and an effective amount of a suitable organic binder. No Drawings

Huckabee, M.L.; Buljan, S.T.; Neil, J.T.

1991-09-17T23:59:59.000Z

222

Ionic liquids for separation of olefin-paraffin mixtures  

DOE Patents [OSTI]

The invention is directed to an ionic liquid comprising (i) a cationic portion containing a complex of a silver (I) ion and one or more neutral ligands selected from organoamides, organoamines, olefins, and organonitriles, and (ii) an anionic portion having the chemical formula ##STR00001## wherein m and n are independently 0 or an integer of 1 or above, and p is 0 or 1, provided that when p is 0, the group --N--SO.sub.2--(CF.sub.2).sub.nCF.sub.3 subtended by p is replaced with an oxide atom connected to the shown sulfur atom. The invention is also directed to a method for separating an olefin from an olefin-paraffin mixture by passing the mixture through a layer of the ionic liquid described above.

Dai, Sheng; Luo, Huimin; Huang, Jing-Fang

2013-09-17T23:59:59.000Z

223

Low velocity ion stopping in binary ionic mixtures  

SciTech Connect (OSTI)

Attention is focused on the low ion velocity stopping mechanisms in multicomponent and dense target plasmas built of quasiclassical electron fluids neutralizing binary ionic mixtures, such as, deuterium-tritium of current fusion interest, proton-heliumlike iron in the solar interior or proton-helium ions considered in planetology, as well as other mixtures of fiducial concern in the heavy ion beam production of warm dense matter at Bragg peak conditions. The target plasma is taken in a multicomponent dielectric formulation a la Fried-Conte. The occurrence of projectile ion velocities (so-called critical) for which target electron slowing down equals that of given target ion components is also considered. The corresponding multiquadrature computations, albeit rather heavy, can be monitored analytical through a very compact code operating a PC cluster. Slowing down results are systematically scanned with respect to target temperature and electron density, as well as ion composition.

Tashev, Bekbolat; Baimbetov, Fazylkhan [Department of Physics, Kazakh National University, Tole Bi 96, Almaty 480012 (Kazakhstan); Deutsch, Claude [LPGP (UMR-CNRS 8578), Universite Paris XI, 91405 Orsay (France); Fromy, Patrice [Direction de l'Informatique, Universite Paris XI, 91405 Orsay (France)

2008-10-15T23:59:59.000Z

224

Ionic liquids for separation of olefin-paraffin mixtures  

DOE Patents [OSTI]

The invention is directed to an ionic liquid comprising (i) a cationic portion containing a complex of a silver (I) ion and one or more neutral ligands selected from organoamides, organoamines, olefins, and organonitriles, and (ii) an anionic portion having the chemical formula ##STR00001## wherein m and n are independently 0 or an integer of 1 or above, and p is 0 or 1, provided that when p is 0, the group --N--SO.sub.2--(CF.sub.2).sub.nCF.sub.3 subtended by p is replaced with an oxide atom connected to the shown sulfur atom. The invention is also directed to a method for separating an olefin from an olefin-paraffin mixture by passing the mixture through a layer of the ionic liquid described above.

Dai, Sheng; Luo, Huimin; Huang, Jing-Fang

2014-07-15T23:59:59.000Z

225

Engineering superfluidity in Bose-Fermi mixtures of ultracold atoms  

Science Journals Connector (OSTI)

We investigate many-body phase diagrams of atomic boson-fermion mixtures loaded in the two-dimensional optical lattice. Bosons mediate an attractive, finite-range interaction between fermions, leading to fermion pairing phases of different orbital symmetries. Specifically, we show that by properly tuning atomic and lattice parameters it is possible to create superfluids with s-, p-, and d-wave pairing symmetry as well as spin and charge density wave phases. These phases and their stability are analyzed within the mean-field approximation for systems of K40-Rb87 and K40-Na23 mixtures. For the experimentally accessible regime of parameters, superfluids with unconventional fermion pairing have transition temperature around a percent of the Fermi energy.

D.-W. Wang; M. D. Lukin; E. Demler

2005-11-17T23:59:59.000Z

226

Analysis and computer tools for separation processes involving nonideal mixtures  

SciTech Connect (OSTI)

The objectives of this research, were to continue to further both the theoretical understanding of and the development of computer tools (algorithms) for separation processes involving nonideal mixtures. These objectives were divided into three interrelated major areas -- the mathematical analysis of the number of steady-state solutions to multistage separation processes, the numerical analysis of general, related fixed-point methods, and the development and implementation of computer tools for process simulation.

Lucia, A.

1992-05-01T23:59:59.000Z

227

Coal liquefaction process using pretreatment with a binary solvent mixture  

DOE Patents [OSTI]

An improved process for thermal solvent refining or hydroliquefaction of non-anthracitic coal at elevated temperatures under hydrogen pressure in a hydrogen donor solvent comprises pretreating the coal with a binary mixture of an aromatic hydrocarbon and an aliphatic alcohol at a temperature below 300 C before the hydroliquefaction step. This treatment generally increases both conversion of coal and yields of oil. 1 fig.

Miller, R.N.

1986-10-14T23:59:59.000Z

228

Accuracy and Consistency of Respiratory Gating in Abdominal Cancer Patients  

SciTech Connect (OSTI)

Purpose: To evaluate respiratory gating accuracy and intrafractional consistency for abdominal cancer patients treated with respiratory gated treatment on a regular linear accelerator system. Methods and Materials: Twelve abdominal patients implanted with fiducials were treated with amplitude-based respiratory-gated radiation therapy. On the basis of daily orthogonal fluoroscopy, the operator readjusted the couch position and gating window such that the fiducial was within a setup margin (fiducial-planning target volume [f-PTV]) when RPM indicated beam-ON. Fifty-five pre- and post-treatment fluoroscopic movie pairs with synchronized respiratory gating signal were recorded. Fiducial motion traces were extracted from the fluoroscopic movies using a template matching algorithm and correlated with f-PTV by registering the digitally reconstructed radiographs with the fluoroscopic movies. Treatment was determined to be accurate if 50% of the fiducial area stayed within f-PTV while beam-ON. For movie pairs that lost gating accuracy, a MATLAB program was used to assess whether the gating window was optimized, the external-internal correlation (EIC) changed, or the patient moved between movies. A series of safety margins from 0.5 mm to 3 mm was added to f-PTV for reassessing gating accuracy. Results: A decrease in gating accuracy was observed in 44% of movie pairs from daily fluoroscopic movies of 12 abdominal patients. Three main causes for inaccurate gating were identified as change of global EIC over time (?43%), suboptimal gating setup (?37%), and imperfect EIC within movie (?13%). Conclusions: Inconsistent respiratory gating accuracy may occur within 1 treatment session even with a daily adjusted gating window. To improve or maintain gating accuracy during treatment, we suggest using at least a 2.5-mm safety margin to account for gating and setup uncertainties.

Ge, Jiajia; Santanam, Lakshmi; Yang, Deshan [Department of Radiation Oncology, Washington University School of Medicine, St Louis, Missouri (United States)] [Department of Radiation Oncology, Washington University School of Medicine, St Louis, Missouri (United States); Parikh, Parag J., E-mail: pparikh@radonc.wustl.edu [Department of Radiation Oncology, Washington University School of Medicine, St Louis, Missouri (United States)

2013-03-01T23:59:59.000Z

229

Numerical studies of hypersonic binary gas-mixture flows near a sphere  

E-Print Network [OSTI]

Numerical studies of hypersonic binary gas-mixture flows near a sphere V.V. Riabov 1 Diffusive] to study the flow. In the present study, diffusive effects in hypersonic flows of binary gas-mixtures near

Riabov, Vladimir V.

230

Compaction and swelling characteristics of sand-bentonite and pumice-bentonite mixtures  

Science Journals Connector (OSTI)

...of sand-bentonite mixture backfill. Applied Clay Science , 26...of sand-bentonite mixture backfill before and after swelling deformation...Co. Pusch R. (2001) The Buffer and Backfill Handbook, Part 2: Materials and Techniques...

Z. Gkalp; M. Ba?aran; O. Uzun

231

The effects of asphalt binder oxidation on hot mix asphalt concrete mixture rheology and fatigue performance  

E-Print Network [OSTI]

. The decline in mixture fatigue life (determined using the calibrated mechanistic fatigue analysis approach with surface energy measurement) due to oxidation is significant. Pavement service life is dependent on the mixture, but can be estimated by a cumulative...

Jung, Sung Hoon

2009-06-02T23:59:59.000Z

232

Ignition of a combustible gas mixture by a laser spark excited in the reactor volume  

Science Journals Connector (OSTI)

Ignition of a stoichiometric CH4: O2 mixture by a laser spark excited in the reactor volume is ... which indicates fast (involving branching chain reactions) ignition of the gas mixture. A conclusion is ... regar...

S. Yu. Kazantsev; I. G. Kononov; I. A. Kossyi; N. M. Tarasova

2009-03-01T23:59:59.000Z

233

Bacterial mutagenicity of polycyclic aromatic hydrocarbons in reconstituted mixtures and crude coal tar extracts and fractions  

E-Print Network [OSTI]

factors which assume additive interactions between individual PAHS. The mutagenic interactions of PAH mixtures were investigated using the Salmonellalmicrosome assay. Two groups of samples included PAH mixtures modeling a coal tar and an environmental...

Onufrock, Amy Mildred

2012-06-07T23:59:59.000Z

234

Mach 2 combustion characteristics of hydrogen/hydrocarbon fuel mixtures  

SciTech Connect (OSTI)

The combustion of H/sub 2//CH/sub 4/ and H/sub 2//C/sub 2/H/sub 4/ mixtures containing 10 to 70 vol pct hydrocarbon at combustor inlet Mach number 2 and temperatures 2000 to 4000 R is investigated experimentally, applying direct-connect test hardware and techniques similar to those described by Diskin and Northam (1987) in the facilities of the NASA Langley Hypersonic Propulsion Branch. The experimental setup, procedures, and data-reduction methods are described; and the results are presented in extensive tables and graphs and characterized in detail. Fuel type and mixture are found to have little effect on the wall heating rate measured near the combustor exit, but H/sub 2//C/sub 2/H/sub 4/ is shown to burn much more efficiently than H/sub 2//CH/sub 4/, with no pilot-off blowout equivalence ratios greater than 0.5. It is suggested that H/sub 2//hydrocarbon mixtures are feasible fuels (at least in terms of combustion efficiency) for scramjet SSTO vehicles operating at freestream Mach numbers above 4.

Diskin, G.S.; Jachimowski, C.J.; Northam, G.B.; Bell, R.A.

1987-01-01T23:59:59.000Z

235

Chapter Three - Crowding in PolymerNanoparticle Mixtures  

Science Journals Connector (OSTI)

Abstract The cell nucleus is a highly crowded environment, filled with a multicomponent, polydisperse mixture of biopolymers and nuclear bodies dispersed in a viscous solvent. With volume fractions approaching 20%, excluded-volume interactions play a key role in determining the structure, dynamics, and function of macromolecules in vivo. Under such constraints, the ensembles of macromolecular conformations can differ substantially from those prevailing in dilute solutions. Crowding thus can affect protein and RNA folding, conformational stability, and reaction kinetics, as well as phase stability of macromolecular mixtures. From the perspective of soft matter physics, this chapter reviews recent studies on crowding in polymernanoparticle mixtures, seeking to demonstrate the utility of simple physical models for addressing challenging issues in cell biology. The focus is on applications of free-volume theory and Monte Carlo simulation, based on geometrical models of polymers as fluctuating spheres or ellipsoids. Ideal polymer coils respond to hard-sphere crowding agents by compactifying, reducing their radius of gyration, and becoming more spherical. At sufficiently high concentrations, polymers and crowders phase-separate. The goal of this review is to identify universal principles governing macromolecular crowding and to establish a general framework for future explorations of more realistic models that may include nonsteric (e.g., electrostatic) interactions.

Alan R. Denton

2014-01-01T23:59:59.000Z

236

Molecular simulations of Hugoniots of detonation products mixtures at chemical equilibrium: Microscopic calculation  

E-Print Network [OSTI]

Molecular simulations of Hugoniots of detonation products mixtures at chemical equilibrium and chemical equilibrium of mixtures of detonation products on the Hugoniot curve. The ReMC method (W. R. Smith the system to satisfy the Hugoniot relation. Once the Hugoniot curve of the detonation products mixture

Paris-Sud XI, Université de

237

The McCormack model for gas mixtures: Plane Couette flow R. D. M. Garcia  

E-Print Network [OSTI]

The McCormack model for gas mixtures: Plane Couette flow R. D. M. Garcia HSH Scientific Computing flow for a binary gas mixture described by the McCormack kinetic model. The solution yields, defined for binary gas mixtures in terms of the McCormack model, for semi-infinite media14 Kramers

Siewert, Charles E.

238

These lecture notes are primarily intended to be an accompanying lecture document for students of the University of Paderborn. It is also available for other interested readers via internet. In any case, only the private, individual, non-commercial usage  

E-Print Network [OSTI]

-Phase Drives P. 2 Preface The course "Controlled Three-Phase Drives" is dedicated to the electric drive system. The electric drive does not only consist of the electric machine, but according to modern understanding also Joachim Böcker #12;Control of Three-Phase Drives P. 3 Contents 1 The Electrical Drive 5 2 Design

Paderborn, Universität

239

Binary and ternary gas mixtures for use in glow discharge closing switches  

DOE Patents [OSTI]

Highly efficient binary and ternary gas mixtures for use in diffuse glow discharge closing switches are disclosed. The binary mixtures are combinations of helium or neon and selected perfluorides. The ternary mixtures are combinations of helium, neon, or argon, a selected perfluoride, and a small amount of gas that exhibits enhanced ionization characteristics. These mixtures are shown to be the optimum choices for use in diffuse glow discharge closing switches by virtue if the combines physio-electric properties of the mixture components. 9 figs.

Hunter, S.R.; Christophorou, L.G.

1988-04-27T23:59:59.000Z

240

Inference in Hybrid Bayesian Networks Using Mixtures of Gaussians  

E-Print Network [OSTI]

function. Finally, we show how a BN with a conditional Gaussian distribution whose variance is a function of its parents can be approximated by a MoG BN. An outline of the remainder of this paper is as follows. In section 2, we describe how a mixture... variable B is a deterministic function of A, B|a = a 2 with probability 1. We say B is ?conditionally deterministic,? and we depict conditionally deterministic variables with triple-bordered circles. A BN graph for this example is shown in Figure 8...

Shenoy, Prakash P.

2006-07-01T23:59:59.000Z

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


241

Plastic flow in polycrystal states in a binary mixture  

E-Print Network [OSTI]

Using molecular dynamics simulation we examine dynamics in sheared polycrystal states in a binary mixture containing 10% larger particles in two dimensions. We find large stress fluctuations arising from sliding motions of the particles at the grain boundaries, which occur cooperatively to release the elastic energy stored. These dynamic processes are visualized with the aid of a sixfold angle $\\alpha_j(t)$ representing the local crystal orientation and a disorder variable $D_j(t)$ representing a deviation from the hexagonal order for particle $j$.

Toshiyuki Hamanaka; Akira Onuki

2007-09-05T23:59:59.000Z

242

Lack of energy equipartition in homogeneous heated binary granular mixtures  

E-Print Network [OSTI]

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

A. Barrat; E. Trizac

2002-05-21T23:59:59.000Z

243

Pneumatic conveying of coal and coal-limestone mixtures as applied to atmospheric fluidized-bed combustion. [Effects of moisture, velocity, particle size  

SciTech Connect (OSTI)

Pneumatic conveying experiments with coal and coal-limestone mixtures were performed on a conveying system designed to represent the feed lines in the Tennessee Valley Authority 20 MW atmospheric fluidized bed combustor. The experimental conditions were chosen to cover the anticipated combustor operating ranges. The results have led to a fundamental understanding of the operating limits associated with coal surface moisture, air velocity, coal and limestone fines, solids to air ratio, and limestone to coal ratio. Coal surface moisture was found to be the most important parameter affecting handling and transport. Specific upper limits for surface moisture were established. It was demonstrated that addition of dry limestone can reduce the conveying problems associated with wet coal. The air velocities causing saltation and surge flow were determined for a variety of conveying conditions. These velocities were related qualitatively to solids to air ratio, particle size, and surface moisture. Conveying pressure drop was also measured for a variety of conditions. In the absence of saltation, the horizontal, frictional pressure drop was only a function of the solids to air ratio and the air flow conditions. Comparison of the ORNL pressure drop data with the results of other investigators had led to the conclusion that there are two basic modes of flow in dilute-phase conveying; a primarily viscous mode and a primarily inertial mode. A general pressure drop model has been developed for the inertial mode.

Daw, C S; Thomas, J F

1982-01-01T23:59:59.000Z

244

Exotic superconducting phases of ultracold atom mixtures on triangular lattices  

Science Journals Connector (OSTI)

We study the phase diagram of two-dimensional Bose-Fermi mixtures of ultracold atoms on a triangular optical lattice, in the limit when the velocity of bosonic condensate fluctuations is much larger than the Fermi velocity. We contrast this work with our previous results for a square lattice system in the work of Mathey et al. [Phys. Rev. Lett. 97, 030601 (2006)]. Using functional renormalization-group techniques we show that the phase diagrams for a triangular lattice contain exotic superconducting phases. For spin-1?2 fermions on an isotropic lattice we find a competition of s-, p-, extended d-, and f-wave symmetries, as well as antiferromagnetic order. For an anisotropic lattice, we further find an extended p-wave phase. A Bose-Fermi mixture with spinless fermions on an isotropic lattice shows a competition between p- and f-wave symmetries. These phases can be traced back to the geometric shapes of the Fermi surfaces in various regimes, as well as the intrinsic frustration of a triangular lattice.

L. Mathey; S.-W. Tsai; A. H. Castro Neto

2007-05-18T23:59:59.000Z

245

A hydroxide mixture as working fluid for absorption heat pumps  

SciTech Connect (OSTI)

Basic experimental investigations were carried out with an aqueous solution of a mixture of KOH and NaOH for use as an absorbent in absorption heat pumps. Due to its thermophysical properties this mixture allows temperature lifts from evaporator to absorber of more than 75 K (135 F) in a single-stage absorption chiller. Thermophysical and hydrodynamical properties of the solution were measured. Vapor-liquid-equilibrium data and specific heat capacities were determined for concentrations ranging from 35% up to 75% and temperatures up to 200 C (392 F). From these data the enthalpy of the solution was calculated. Additionally the crystallization temperatures, the density, and the viscosity of the solution were determined. The experimental equipment is described. The data are presented as polynomials and diagrams including experimental accuracy. An apparatus was constructed to measure heat and mass transfer coefficients of the absorption process with this solution. The apparatus is a model of a horizontal tube falling-film absorber. The experimental setup of the apparatus and results of the first measurements are presented.

Beutler, A.S.; Feuerecker, G.R.; Alefeld, G. [Technische Univ. Muenchen, Munich (Germany). Physik Dept.

1996-11-01T23:59:59.000Z

246

Detonation engine fed by acetyleneoxygen mixture  

Science Journals Connector (OSTI)

Abstract The advantages of a constant volume combustion cycle as compared to constant pressure combustion in terms of thermodynamic efficiency has focused the search for advanced propulsion on detonation engines. Detonation of acetylene mixed with oxygen in various proportions is studied using mathematical modeling. Simplified kinetics of acetylene burning includes 11 reactions with 9 components. Deflagration to detonation transition (DDT) is obtained in a cylindrical tube with a section of obstacles modeling a Shchelkin spiral; the DDT takes place in this section for a wide range of initial mixture compositions. A modified ka-omega turbulence model is used to simulate flame acceleration in the Shchelkin spiral section of the system. The results of numerical simulations were compared with experiments, which had been performed in the same size detonation chamber and turbulent spiral ring section, and with theoretical data on the ChapmanJouguet detonation parameters.

N.N. Smirnov; V.B. Betelin; V.F. Nikitin; Yu.G. Phylippov; Jaye Koo

2014-01-01T23:59:59.000Z

247

Kinetic Method for Hydrogen-Deuterium-Tritium Mixture Distillation Simulation  

SciTech Connect (OSTI)

Simulation of hydrogen distillation plants requires mathematical procedures suitable for multicomponent systems. In most of the present-day simulation methods a distillation column is assumed to be composed of theoretical stages, or plates. However, in the case of a multicomponent mixture theoretical plate does not exist.An alternative kinetic method of simulation is depicted in the work. According to this method a system of mass-transfer differential equations is solved numerically. Mass-transfer coefficients are estimated with using experimental results and empirical equations.Developed method allows calculating the steady state of a distillation column as well as its any non-steady state when initial conditions are given. The results for steady states are compared with ones obtained via Thiele-Geddes theoretical stage technique and the necessity of using kinetic method is demonstrated. Examples of a column startup period and periodic distillation simulations are shown as well.

Sazonov, A.B.; Kagramanov, Z.G.; Magomedbekov, E.P. [Mendeleyev University of Chemical Technology of Russia (Russian Federation)

2005-07-15T23:59:59.000Z

248

Instabilities in granular binary mixtures at moderate densities  

Science Journals Connector (OSTI)

A linear stability analysis of the Navier-Stokes (NS) granular hydrodynamic equations is performed to determine the critical length scale for the onset of vortices and clusters instabilities in granular dense binary mixtures. In contrast to previous attempts, our results (which are based on the solution to the inelastic Enskog equation to NS order) are not restricted to nearly elastic systems since they take into account the complete nonlinear dependence of the NS transport coefficients on the coefficients of restitution ?ij. The theoretical predictions for the critical length scales are compared to molecular dynamics (MD) simulations in flows of strong dissipation (?ij?0.7) and moderate solid volume fractions (??0.2). We find excellent agreement between MD and kinetic theory for the onset of velocity vortices, indicating the applicability of NS hydrodynamics to polydisperse flows even for strong inelasticity, finite density, and particle dissimilarity.

Peter P. Mitrano; Vicente Garz; Christine M. Hrenya

2014-02-10T23:59:59.000Z

249

Potential Energy Savings by Using Alternative Technologies for the Separation of Fluid Mixtures  

E-Print Network [OSTI]

POTENTIAL ENERGY SA~INGS BY USING ALTERNATIVE TECHNOLOGIES FOR THE SEPARATION OF FLUID MIXTURES J. L. BRAVO CENTER FOR ENERGY STUDIES THE UNIVERSITY OF ABSTRACT The focus of this work is to analyze alternative processes and technologies... for the separation of fluid mixtures with respect to energy consumption. In an effort to illustrate the dramatic potential energy savings of various alternative separation processes, evaluations of such processes for three industrially important fluid mixtures...

Bravo, J. L.

250

Membrane permeation process for dehydration of organic liquid mixtures using sulfonated ion-exchange polyalkene membranes  

DOE Patents [OSTI]

A membrane permeation process for dehydrating a mixture of organic liquids, such as alcohols or close boiling, heat sensitive mixtures. The process comprises causing a component of the mixture to selectively sorb into one side of sulfonated ion-exchange polyalkene (e.g., polyethylene) membranes and selectively diffuse or flow therethrough, and then desorbing the component into a gas or liquid phase on the other side of the membranes.

Cabasso, Israel (131 Buckingham Ave., Syracuse, NY 13210); Korngold, Emmanuel (P.O. Box 1025, Beer-Sheva 84110, IL)

1988-01-01T23:59:59.000Z

251

Experimental measurements and modeling prediction of flammability limits of binary hydrocarbon mixtures  

E-Print Network [OSTI]

of methane in air using thermal criterion?????..50 4.8 Determination of LFL of ethylene in air using thermal criterion???...??..51 4.9 Lower flammability limits of methane and n-butane mixtures in air at standard conditions...????????????????????..56 4.14 Upper flammability limits of methane and n-butane mixtures in air at standard conditions?????????????..???????57 4.15 Upper flammability limits of methane and ethylene mixtures in air at standard conditions...

Zhao, Fuman

2009-05-15T23:59:59.000Z

252

Methods and compositions for removing carbon dioxide from a gaseous mixture  

DOE Patents [OSTI]

Provided is a method for adsorbing or separating carbon dioxide from a mixture of gases by passing the gas mixture through a porous three-dimensional polymeric coordination compound having a plurality of layers of two-dimensional arrays of repeating structural units, which results in a lower carbon dioxide content in the gas mixture. Thus, this invention provides useful compositions and methods for removal of greenhouse gases, in particular CO.sub.2, from industrial flue gases or from the atmosphere.

Li, Jing; Wu, Haohan

2014-06-24T23:59:59.000Z

253

Mutual diffusion in binary Ar-Kr mixtures and empirical diffusion models  

Science Journals Connector (OSTI)

Molecular dynamics simulations of four binary Ar-Kr mixtures are used to compute self- and mutual-diffusion coefficients. Results using mean squared displacements and using velocity correlation functions are presented. The diffusivity coefficients are also presented in the time and frequency domains where a comparatively low frequency structure is evident in some simulations. The computed diffusivities are dependent on the maximum time over which the velocity correlation functions are integrated and the time at which the Einstein relationships are evaluated. This dependence explains in part the small systematic differences between our results (2080 ps) and earlier molecular dynamics results (<4 ps) in the system Ar-Kr. We compare the computed mutual diffusion coefficients to two empirical models, Darkens model and the common force model. Darkens model is consistent with our results over the entire frequency range we resolve. At frequencies lower than about 5 ps-1 Darkens model and the common force model converge and we cannot discriminate between them. At higher frequencies the common force model prediction is significantly different from the computed mutual diffusion coefficient. Assumptions regarding the contribution of cross correlations that are implicit in the empirical models are discussed and tested against our simulation results. The net contribution of velocity cross correlations is found to be negligible, as is often assumed in deriving Darkens model, but the individual cross-correlation terms are substantial and negativea finding contrary to common assumptions. 1996 The American Physical Society.

Yanhua Zhou and Gregory H. Miller

1996-02-01T23:59:59.000Z

254

The low?frequency radiation and scattering of sound from bubbly mixtures near the sea surface  

Science Journals Connector (OSTI)

Microbubble plumes are produced when waves break and are convected to depth. What role these microbubble plumes have in the production of sound and the scattering of sound near the sea surface from the low? (20?Hz) to mid? (2?kHz) frequency range? Ocean ambient noise shows a dramatic increase in midfrequency levels when wave breaking occurs. Measurements of scattering from the sea surface have a different characteristic than expected by Bragg scattering from gravity waves i.e. a large zero Doppler component. If microbubbleclouds and plumes with void fractions greater than 0.0001 act as collective resonant oscillators then noise can be produced and scattering can occur with little Doppler shift but ample spread. This hypothesis was based on the theory that the mixture properties determine the radiation and scattering from such a compact region. Experimental results show that the far field radiation of sound from a compact region can be described by monopole volume pulsation beneath a pressure release surface with the natural frequency described by a modified Minneart formula. Scattering measurements from submerged bubble clouds show a significant low frequency scattering. Experimental evidence and theoretical formulations are consistent with collective phenomenon. [Work supported by ONR.

William M. Carey; Ronald A. Roy

1997-01-01T23:59:59.000Z

255

Characterisation of polar unresolved complex mixtures in groundwater associated with weathered petroleum.  

E-Print Network [OSTI]

??Polar unresolved complex mixtures (UCMs) associated with weathered petroleum in groundwater have received little attention in the literature. These compounds can be incorporated in analytical (more)

Lang, Dale Allan

2011-01-01T23:59:59.000Z

256

Chemical mixtures and interactions with detoxification mechanisms and biomarker responses in fish.  

E-Print Network [OSTI]

??Several classes of anthropogenic chemicals are present as mixtures in the aquatic environment. However, information of how wildlife species, including fish, are affected by exposures (more)

Grns, Johanna

2015-01-01T23:59:59.000Z

257

Laboratory Toxicity and Field Effects of a Complex Mixture: Oil-field Produced Water.  

E-Print Network [OSTI]

??This dissertation investigated how organisms in the field and the laboratory responded to complex mixtures or combinations of stressors. Organisms are continually exposed to natural (more)

Fisher, Jonathan C.

2010-01-01T23:59:59.000Z

258

Permeabilities of coal-biomass mixtures for high pressure gasifier feeds.  

E-Print Network [OSTI]

??Complete measurements of permeability on coal-biomass mixtures as a potential feedstock to gasifiers to reduce net carbon emissions were performed. Permeability is measured under anticipated (more)

Belvalkar, Rohan

2012-01-01T23:59:59.000Z

259

E-Print Network 3.0 - aqueous binary mixtures Sample Search Results  

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

and in aqueous hydrocarbon mixtures. Illustrative examples show... that PREOS with SAFT is useful for describing pure water as well as ... Source: Wu, Jianzhong - Department...

260

Fluid-phase behavior of binary mixtures in which one component can have two critical points  

E-Print Network [OSTI]

and SAFT models8­12 to compute mixture phase diagrams see, e.g., Refs. 13­18 . The result- ing taxonomy

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


261

Effect of flow velocity and temperature on ignition characteristics in laser ignition of natural gas and air mixtures  

Science Journals Connector (OSTI)

Abstract Laser induced spark ignition offers the potential for greater reliability and consistency in ignition of lean air/fuel mixtures. This increased reliability is essential for the application of gas turbines as primary or secondary reserve energy sources in smart grid systems, enabling the integration of renewable energy sources whose output is prone to fluctuation over time. This work details a study into the effect of flow velocity and temperature on minimum ignition energies in laser-induced spark ignition in an atmospheric combustion test rig, representative of a sub 15MW industrial gas turbine (Siemens Industrial Turbomachinery Ltd., Lincoln, UK). Determination of minimum ignition energies required for a range of temperatures and flow velocities is essential for establishing an operating window in which laser-induced spark ignition can operate under realistic, engine-like start conditions. Ignition of a natural gas and air mixture at atmospheric pressure was conducted using a laser ignition system utilizing a Q-switched Nd:YAG laser source operating at 532nm wavelength and 4ns pulse length. Analysis of the influence of flow velocity and temperature on ignition characteristics is presented in terms of required photon flux density, a useful parameter to consider during the development laser ignition systems.

J. Griffiths; M.J.W. Riley; A. Borman; C. Dowding; A. Kirk; R. Bickerton

2015-01-01T23:59:59.000Z

262

DSM-PM2: A Portable Implementation Platform for Multithreaded DSM Consistency Protocols  

Science Journals Connector (OSTI)

DSM-PM2 is a platform for designing, implementing and experimenting with multithreaded DSM consistency protocols. It provides a generic toolbox ... alternative protocols for a given consistency model. DSM-PM2 is ...

Gabriel Antoniu; Luc Boug

2001-01-01T23:59:59.000Z

263

Pattern formation in binary mixture convection in cylindrical three-dimensional cells  

E-Print Network [OSTI]

present numerical results of pattern selection near the onset of convection for a water-ethanol mixture of the cell is = 11. The onset of convection occurs via a subcritical Hopf bifurcation. Slightly above ratio mixtures, S subcritical and gives rise

Batiste, Oriol

264

Pair-copula based mixture models and their application in clustering  

Science Journals Connector (OSTI)

Finite mixtures are often used to perform model based clustering of multivariate data sets. In real life applications, such data may exhibit complex nonlinear form of dependence among the variables. Also, the individual variables (margins) may follow ... Keywords: Clustering, D-vine, Mixture models, Pair-copula construction

Anandarup Roy; Swapan K. Parui

2014-04-01T23:59:59.000Z

265

Quantitative Analysis of Ternary Vapor Mixtures Using a Microcantilever-Based Electronic Nose  

SciTech Connect (OSTI)

The authors report the identification and quantification of the components of a ternary vapor mixture using a microcantilever-based electronic nose. An artificial neural network was used for pattern recognition. Dimethyl methyl phosphonate vapor in ppb concentrations and water and ethanol vapors in ppm concentrations were quantitatively identified either individually or in binary and ternary mixtures at varying concentrations.

Pinnaduwage, Lal A [ORNL; Zhao, Weichang [ORNL; Gehl, Anthony C [ORNL; Allman, Steve L [ORNL

2007-01-01T23:59:59.000Z

266

SAFETY OF HYDROGEN/NATURAL GAS MIXTURES BY PIPELINES: ANR FRENCH PROJECT HYDROMEL  

E-Print Network [OSTI]

1 SAFETY OF HYDROGEN/NATURAL GAS MIXTURES BY PIPELINES: ANR FRENCH PROJECT HYDROMEL Hébrard, J.1 linked with Hydrogen/Natural gas mixtures transport by pipeline, the National Institute of Industrial scenario, i.e. how the addition of a quantity of hydrogen in natural gas can increase the potential

Boyer, Edmond

267

Experimental Study on Transmission of an Overdriven Detonation Wave Across a Mixture  

E-Print Network [OSTI]

Experimental Study on Transmission of an Overdriven Detonation Wave Across a Mixture J. Li1 , K a strong overdriven state in a weaker mixture by propagating an overdriven detonation wave via a deflagration-to-detonation transition (DDT) process. First, preliminary experiments with a propane

Texas at Arlington, University of

268

Critical Casimir Effect and Wetting by Helium Mixtures T. Ueno,* S. Balibar, T. Mizusaki,  

E-Print Network [OSTI]

He-4He mixtures against a sapphire window. We have found that this angle is finite and does not tend [1­4]. We found an exception to it by studying helium mixtures in contact with a sapphire window [5 of the fluctuations of superfluidity, i.e., a critical Casimir effect [7­11] in the 4 He-rich film between

Caupin, Frédéric

269

Lattice Boltzmann model for binary mixtures Li-Shi Luo1,  

E-Print Network [OSTI]

Lattice Boltzmann model for binary mixtures Li-Shi Luo1, * and Sharath S. Girimaji2, 1 ICASE, Mail 2002 An a priori derivation of the lattice Boltzmann equations for binary mixtures is provided The lattice Boltzmann equation LBE 1­6 is emerging as an effective computational method based on fundamental

Luo, Li-Shi

270

Experimental investigation of burning velocities of ultra-wet methane-air-steam mixtures  

E-Print Network [OSTI]

Experimental investigation of burning velocities of ultra-wet methane-air-steam mixtures Eric Abstract Global burning velocities of methane-air-steam mixtures are measured on prismatic laminar Bunsen flames and lifted turbulent V-flames for various preheating temperatures, equivalence ratios and steam

Paris-Sud XI, Université de

271

Two-Phase Flow of Two HFC Refrigerant Mixtures Through Short Tube Orifices, Draft Final Report  

E-Print Network [OSTI]

The present study presents data for flow of two refrigerant mixtures through short tube orifices. The two mixtures were R3211251134a (23%/25%/52% on a mass percentage basis) and R321125 (50%/50%). The following presents results for the flow...

Payne, W. V.; O'Neal, D. L.

1994-01-01T23:59:59.000Z

272

Modeling Disease Incidence Data with Spatial and Spatio-Temporal Dirichlet Process Mixtures  

E-Print Network [OSTI]

Modeling Disease Incidence Data with Spatial and Spatio-Temporal Dirichlet Process Mixtures approaches to analyze such data. We develop a hierarchical specification using spatial random effects modeled. Key words: Areal unit spatial data; Dirichlet process mixture models; Disease mapping; Dy- namic

Wolpert, Robert L

273

Potential of organic Rankine cycle using zeotropic mixtures as working fluids for waste heat recovery  

Science Journals Connector (OSTI)

Abstract The performance of the ORC (organic Rankine cycle) systems using zeotropic mixtures as working fluids for recovering waste heat of flue gas from industrial boiler is examined on the basis of thermodynamics and thermo-economics under different operating conditions. In order to explore the potential of the mixtures as the working fluids in the ORC, the effects of various mixtures with different components and composition proportions on the system performance have been analyzed. The results show that the compositions of the mixtures have an important effect on the ORC system performance, which is associated with the temperature glide during the phase change of mixtures. From the point of thermodynamics, the performance of the ORC system is not always improved by employing the mixtures as the working fluids. The merit of the mixtures is related to the restrictive conditions of the ORC, different operating conditions results in different conclusions. At a fixed pinch point temperature difference, the small mean heat transfer temperature difference in heat exchangers will lead to a larger heat transfer area and the larger total cost of the ORC system. Compared with the ORC with pure working fluids, the ORC with the mixtures presents a poor economical performance.

You-Rong Li; Mei-Tang Du; Chun-Mei Wu; Shuang-Ying Wu; Chao Liu

2014-01-01T23:59:59.000Z

274

Modeling and Generating Daily Changes in Market Variables Using A Multivariate Mixture of Normal Distributions  

E-Print Network [OSTI]

Modeling and Generating Daily Changes in Market Variables Using A Multivariate Mixture of Normal Distributions Jin Wang Department of Mathematics and Computer Science Valdosta State University Valdosta, GA 31698-0040 January 28, 2000 Abstract The mixture of normal distributions provides a useful extension

Wang, Jin

275

The Hamilton principle for fluid binary mixtures with two temperatures Henri Gouin1  

E-Print Network [OSTI]

The Hamilton principle for fluid binary mixtures with two temperatures Henri Gouin1 and Tommaso, the Hamilton principle of least action is able to produce the equation of motion for each component that the Hamilton principle can afford to obtain the equations of motions for multi- temperature mixtures of fluids

Boyer, Edmond

276

Phase Behavior and 3D Structure of Strongly Attractive Microsphere-Nanoparticle Mixtures  

E-Print Network [OSTI]

Phase Behavior and 3D Structure of Strongly Attractive Microsphere-Nanoparticle Mixtures James F microspheres and polystyrene nanoparticles. These binary mixtures are electrostatically tuned to promote a repulsion between like-charged (microsphere-microsphere and nanoparticle-nanoparticle) species and a strong

Weeks, Eric R.

277

Nickel Sorption Mechanisms in a PyrophylliteMontmorillonite Mixture Evert J. Elzinga1  

E-Print Network [OSTI]

Nickel Sorption Mechanisms in a Pyrophyllite­Montmorillonite Mixture Evert J. Elzinga1 and Donald L-mail: elzinga@udel.edu Received October 6, 1998; accepted February 17, 1999 Nickel sorption on pyrophyllite in the overall Ni uptake in the clay mixture, and that neither sorption mechanism truly out-competed the other

Sparks, Donald L.

278

Bubble and droplet motion in binary mixtures: Evaporation-condensation mechanism and Marangoni effect  

E-Print Network [OSTI]

Bubble and droplet motion in binary mixtures: Evaporation-condensation mechanism and Marangoni 2009; published 14 April 2009 Bubble and droplet motion in binary mixtures is studied in weak heat a crossover concentration c inversely proportional to the radius R of the bubble or droplet. Here c is usually

279

Magnetic birefringence in mixtures of a nematic aromatic polyester and PAA  

E-Print Network [OSTI]

L-329 Magnetic birefringence in mixtures of a nematic aromatic polyester and PAA J. M. Gilli, G'un cristal liquide de petites molécules (PAA) et d'un polymère nématique. La constante de Cotton-Mouton (CM birefringence was measured in a mixture of a small molecule liquid crystal (PAA) and a nematic polymer

Boyer, Edmond

280

Production of Cellulase on Mixtures of Xylose and Cellulose in a Fed-Batch Process  

E-Print Network [OSTI]

saccharification to sugars for ethanol production. In the past decade, enzymatic hydrolysis of cellulose hasProduction of Cellulase on Mixtures of Xylose and Cellulose in a Fed-Batch Process Ali Mohagheghi was studied in a fed-batch system. An initial mixture of 30 g/L xylose and 20 g/L cellulose

California at Riverside, University of

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


281

Independent components in spectroscopic analysis of complex mixtures Yulia B. Monakhova a,  

E-Print Network [OSTI]

resolution Independent component analysis MILCA SNICA Vitamins Polyaromatic hydrocarbons We applied two mixtures of major ecotoxicants (aromatic and polyaromatic hydrocarbons), amino acids and complex mixtures as about 700 major contaminants are standardized in the course of water and air control [2]. Obviously

Ferreira, Márcia M. C.

282

BLIND SEPARATION OF FETAL ECG FROM SINGLE MIXTURE USING SVD AND ICA  

E-Print Network [OSTI]

BLIND SEPARATION OF FETAL ECG FROM SINGLE MIXTURE USING SVD AND ICA Ping Gao Dept. of Computational@zwhome.org ABSTRACT In this paper, we propose a novel blind-source separation method to extract fetal ECG from a single-channel signal measured on the abdomen of the mother. The signal is a mixture of the fetal ECG

Chang, Ee-Chien

283

Extension of the semi-empirical correlation for the effects of pipe diameter and internal surface roughness on the decompression wave speed to include High Heating Value Processed Gas mixtures  

Science Journals Connector (OSTI)

Abstract The decompression wave speed, which is used throughout the pipeline industry in connection with the Battelle two-curve method for the control of propagating ductile fracture, is typically calculated using GASDECOM (GAS DECOMpression). GASDECOM, developed in the 1970's, idealizes the decompression process as isentropic and one-dimensional, taking no account of pipe wall frictional effects or pipe diameter. Previous shock tube tests showed that decompression wave speeds in smaller diameter and rough pipes are consistently slower than those predicted by GASDECOM for the same conditions of mixture composition and initial pressure and temperature. Previous analysis based on perturbation theory and the fundamental momentum equation revealed a correction term to be subtracted from the idealized value of the decompression speed calculated by GASDECOM. One parameter in this correction term involves a dynamic spatial pressure gradient of the outflow at the rupture location. While this is difficult to obtain without a shock tube or actual rupture test, data from 14 shock tube tests, as well as from 14 full scale burst tests involving a variety of gas mixture compositions, were analyzed to correlate the variation of this pressure gradient with two characteristics of the gas mixture, namely; the molecular weight and the higher heating value (HHV). For lean to moderately-rich gas mixes, the developed semi-empirical correlation was found to fit very well the experimentally determined decompression wave speed curve. For extremely rich gas mixes, such as High Heating Value Processed Gas (HHVPG) mixtures of HHV up to 58MJ/m3, it was found that it overestimates the correction term. Therefore, additional shock tube tests were conducted on (HHVPG) mixes, and the previously developed semi-empirical correlation was extended (revised) to account for such extremity in the richness of the gas mixtures. The newly developed semi-empirical correlation covers a wider range of natural gas mixtures from as lean as pure methane up to HHVPG mixtures of HHV=58MJ/m3.

K.K. Botros; L. Carlson; M. Reed

2013-01-01T23:59:59.000Z

284

Published in Software -Practice and Experience Vol. 20, No. 6., Wiley Supporting flexible consistency management via  

E-Print Network [OSTI]

and contrasted to existing consistency management approaches. #12;Page 2 2. COMMON CONSISTENCY MANAGEMENT consistency management via discrete change description propagation JOHN C. GRUNDY Department of Computer Science, University of Waikato, Private Bag 3105, Hamilton, New Zealand JOHN G. HOSKING AND WARWICK B

Grundy, John

285

Internal consistency and the inner model hypothesis (Budapest lecture, August 2005)  

E-Print Network [OSTI]

for ``ZFC + # is consistent'' and Icon(ZFC + #) stand for ``there is an inner model of ZFC + #''. A typical. An internal consistency result takes the form Icon(ZFC + LC) # Icon(ZFC + #). Thus a statement # is internally consistent relative to large cardinals i# Icon(ZFC + #) follows from Icon(ZFC + LC) for some large cardinal

286

Internal consistency and the inner model hypothesis (Budapest lecture, August 2005)  

E-Print Network [OSTI]

for "ZFC + is consistent" and Icon(ZFC + ) stand for "there is an inner model of ZFC + ". A typical. An internal consistency result takes the form Icon(ZFC + LC) Icon(ZFC + ). Thus a statement is internally consistent relative to large cardinals iff Icon(ZFC + ) follows from Icon(ZFC + LC) for some large cardinal

287

Physical and mechanical properties of bituminous mixtures containing oil shales  

SciTech Connect (OSTI)

Rutting of bituminous surfaces on the Jordanian highways is a recurring problem. Highway authorities are exploring the use of extracted shale oil and oil shale fillers, which are abundant in Jordan. The main objectives of this research are to investigate the rheological properties of shale oil binders (conventional binder with various percentages of shale oil), in comparison with a conventional binder, and to investigate the ability of mixes to resist deformation. The latter is done by considering three wearing course mixes containing three different samples of oil shale fillers--which contained three different oil percentages--together with a standard mixture containing limestone filler. The Marshall design method and the immersion wheel tracking machine were adopted. It was concluded that the shale oil binders displayed inconsistent physical properties and therefore should be treated before being used. The oil shale fillers have provided mixes with higher ability to resist deformation than the standard mix, as measured by the Marshall quotients and the wheel tracking machine. The higher the percentages of oil in the oil shale fillers, the lower the ability of the mixes to resist deformation.

Katamine, N.M.

2000-04-01T23:59:59.000Z

288

Flammability of selected heat resistant alloys in oxygen gas mixtures  

SciTech Connect (OSTI)

Within recent years, the use of oxygen has increased in applications where elevated temperatures and corrosion may be significant factors. In such situations, traditional alloys used in oxygen systems will not be adequate. Where alternative alloys must be utilized, based upon environmental requirements, it is essential that they may be characterized with respect to their ignition and combustion resistance in oxygen. Promoted ignition and promoted ignition-combustion are terms which have been used to describe a situation where a substance with low oxygen supports the combustion of a compatibility ignites and more ignition resistant material. In this paper, data will be presented on the promoted ignition-combustion behavior of selected heat resistant engineering alloys that may be considered for gaseous oxygen applications in severe environments. In this investigation, alloys have been evaluated via both flowing and static (fixed volume) approaches using a rod configuration. Oxygen-nitrogen gas mixtures with compositions ranging from approximately 40 to 99.7% oxygen at pressures of 3.55 to 34.6 MPa were used in the comparative studies.

Zawierucha, R.; McIlroy, K.; Million, J.F. [Praxair, Inc., Tonawanda, NY (United States)

1995-12-31T23:59:59.000Z

289

Polymer Crowding and Shape Distributions in Polymer-Nanoparticle Mixtures  

E-Print Network [OSTI]

Macromolecular crowding can influence polymer shapes, which is important for understanding the thermodynamic stability of polymer solutions and the structure and function of biopolymers (proteins, RNA, DNA) under confinement. We explore the influence of nanoparticle crowding on polymer shapes via Monte Carlo simulations and free-volume theory of a coarse-grained model of polymer-nanoparticle mixtures. Exploiting the geometry of random walks, we model polymer coils as effective penetrable ellipsoids, whose shapes fluctuate according to the probability distributions of the eigenvalues of the gyration tensor. Accounting for the entropic cost of a nanoparticle penetrating a larger polymer coil, we compute the crowding-induced shift in the shape distributions, radius of gyration, and asphericity of ideal polymers in a theta solvent. With increased nanoparticle crowding, we find that polymers become more compact (smaller, more spherical), in agreement with predictions of free-volume theory. Our approach can be easily extended to nonideal polymers in good solvents and used to model conformations of biopolymers in crowded environments.

Wei Kang Lim; Alan R. Denton

2014-10-24T23:59:59.000Z

290

Method and compositions for the degradation of tributyl phosphate in chemical waste mixtures  

DOE Patents [OSTI]

A method and process are disclosed for the degradation of tributyl phosphate in an organic waste mixture and a biologically pure, novel bacteria culture for accomplishing the same. A newly-discovered bacteria (a strain of Acinetobacter sp. ATCC 55587) is provided which is combined in a reactor vessel with a liquid waste mixture containing tributyl phosphate and one or more organic waste compounds capable of functioning as growth substrates for the bacteria. The bacteria is thereafter allowed to incubate within the waste mixture. As a result, the tributyl phosphate and organic compounds within the waste mixture are metabolized (degraded) by the bacteria, thereby eliminating such materials which are environmentally hazardous. In addition, the bacteria is capable of degrading waste mixtures containing high quantities of tributyl phosphate (e.g. up to about 1.0% by weight tributyl phosphate). 6 figs.

Stoner, D.L.; Tien, A.J.

1995-09-26T23:59:59.000Z

291

Exergy analysis of zeotropic mixtures as working fluids in Organic Rankine Cycles  

Science Journals Connector (OSTI)

Abstract The thermodynamic performance of non-superheated subcritical Organic Rankine Cycles (ORCs) with zeotropic mixtures as working fluids is examined based on a second law analysis. In a previous study, a mixture selection method based on a first law analysis was proposed. However, to assess the performance potential of zeotropic mixtures as working fluids the irreversibility distributions under different mixtures compositions are calculated. The zeotropic mixtures under study are: R245fapentane, R245faR365mfc, isopentaneisohexane, isopentanecyclohexane, isopentaneisohexane, isobutaneisopentane and pentanehexane. The second law efficiency, defined as the ratio of shaft power output and input heat carrier exergy, is used as optimization criterion. The results show that the evaporator accounts for the highest exergy loss. Still, the best performance is achieved when the condenser heat profiles are matched. An increase in second law efficiency in the range of 7.1% and 14.2% is obtained compared to pure working fluids. For a heat source of 150C, the second law efficiency of the pure fluids is in the range of 26.7% and 29.1%. The second law efficiency in function of the heat carrier temperature between 120C and 160C shows an almost linear behavior for all investigated mixtures. Furthermore, between optimized \\{ORCs\\} with zeotropic mixtures as working fluid the difference in second law efficiency varies less than 3 percentage points.

S. Lecompte; B. Ameel; D. Ziviani; M. van den Broek; M. De Paepe

2014-01-01T23:59:59.000Z

292

Morphological Characterization of DMPC/CHAPSO Bicellar Mixtures: A Combined SANS and NMR Study  

SciTech Connect (OSTI)

Spontaneously forming structures of a system composed of dimyristoyl phosphatidylcholine (DMPC) and 3-[(3-cholamidopropyl)dimethylammonio]-2-hydroxy-1-propanesulfonate (CHAPSO) were studied by small-angle neutron scattering (SANS), 31P NMR, and stimulated echo (STE) pulsed field gradient (PFG) 1H NMR diffusion measurements. Charged lipid dimyristoyl phosphatidylglycerol (DMPG) was used to induce different surface charge densities. The structures adopted were investigated as a function of temperature and lipid concentration for samples with a constant molar ratio of long-chain to short-chain lipids (=3). In the absence of DMPG, zwitterionic bicellar mixtures exhibited a phase transition from discoidal bicelles, or ribbons, to multilamellar vesicles either upon dilution or with increased temperature. CHAPSO-containing mixtures showed a higher thermal stability in morphology than DHPC-containing mixtures at the corresponding lipid concentrations. In the presence of DMPG, discoidal bicelles (or ribbons) were also found at low temperature and lower lipid concentration mixtures. At high temperature, perforated lamellae were observed in high concentration mixtures ( 7.5 wt %) whereas uniform unilamellar vesicles and bicelles formed in low-concentration mixtures ( 2.5 wt %), respectively, when the mixtures were moderately and highly charged. From the results, spontaneous structural diagrams of the zwitterionic and charged systems were constructed.

Li, Ming [University of Connecticut, Storrs] [University of Connecticut, Storrs; Morales, Hannah H [University of Toronto, Canada] [University of Toronto, Canada; Katsaras, John [ORNL] [ORNL; Kucerka, Norbert [Atomic Energy of Canada Limited (AECL), Canadian Neutron Beam Centre (CNBC) and Comenius University,] [Atomic Energy of Canada Limited (AECL), Canadian Neutron Beam Centre (CNBC) and Comenius University,; Yang, Yongkun [University of Connecticut, Storrs] [University of Connecticut, Storrs; Macdonald, P [University of Toronto, Canada] [University of Toronto, Canada; Nieh, Mu-Ping [University of Connecticut, Storrs] [University of Connecticut, Storrs

2013-01-01T23:59:59.000Z

293

The thermodynamic properties of mixtures of normal hexane and branched paraffin hydrocarbons  

E-Print Network [OSTI]

In the mid fifties, Myers (22) studied the vapor-liq- uid equilibria of eighteen binary mixtures of paraffins, naphthenes and aromatics by employing a equilibrium-still (14) of the vapor-recirculating type at an absolute pres- sure of 760 mm. Hg. Activity... for these mixtures indicate that in general, mixtures of paraf- fins and aromatics show the greatest deviations from ide- ality. For the five paraffin-aromatic systems studied, terminal activity coefficients range from about 1. 3 to 1. 8. For naphthene...

Ho, Chun Leung

1975-01-01T23:59:59.000Z

294

Separation of a target substance from a fluid or mixture using encapsulated sorbents  

DOE Patents [OSTI]

Method and apparatus for separating a target substance from a fluid or mixture. Capsules having a coating and stripping solvents encapsulated in the capsules are provided. The coating is permeable to the target substance. The capsules having a coating and stripping solvents encapsulated in the capsules are exposed to the fluid or mixture. The target substance migrates through the coating and is taken up by the stripping solvents. The target substance is separated from the fluid or mixture by driving off the target substance from the capsules.

Aines, Roger D; Spadaccini, Christopher M; Stolaroff, Joshuah K; Bourcier, William L; Lewis, Jennifer A; Duoss, Eric B; Vericella, John J

2014-09-16T23:59:59.000Z

295

High-temperature sorbent method for removal of sulfur containing gases from gaseous mixtures  

DOE Patents [OSTI]

A copper oxide-zinc oxide mixture is used as a sorbent for removing hydrogen sulfide and other sulfur containing gases at high temperatures from a gaseous fuel mixture. This high-temperature sorbent is especially useful for preparing fuel gases for high temperature fuel cells. The copper oxide is initially reduced in a preconditioning step to elemental copper and is present in a highly dispersed state throughout the zinc oxide which serves as a support as well as adding to the sulfur sorption capacity. The spent sorbent is regenerated by high-temperature treatment with an air fuel, air steam mixture followed by hydrogen reduction to remove and recover the sulfur.

Young, John E. (Woodridge, IL); Jalan, Vinod M. (Concord, MA)

1984-01-01T23:59:59.000Z

296

High-temperature sorbent method for removal of sulfur-containing gases from gaseous mixtures  

DOE Patents [OSTI]

A copper oxide-zinc oxide mixture is used as a sorbent for removing hydrogen sulfide and other sulfur containing gases at high temperatures from a gaseous fuel mixture. This high-temperature sorbent is especially useful for preparing fuel gases for high temperature fuel cells. The copper oxide is initially reduced in a preconditioning step to elemental copper and is present in a highly dispersed state throughout the zinc oxide which serves as a support as well as adding to the sulfur sorbtion capacity. The spent sorbent is regenerated by high-temperature treatment with an air fuel, air steam mixture followed by hydrogen reduction to remove and recover the sulfur.

Young, J.E.; Jalan, V.M.

1982-07-07T23:59:59.000Z

297

High-temperature sorbent method for removal of sulfur containing gases from gaseous mixtures  

DOE Patents [OSTI]

A copper oxide-zinc oxide mixture is used as a sorbent for removing hydrogen sulfide and other sulfur containing gases at high temperatures from a gaseous fuel mixture. This high-temperature sorbent is especially useful for preparing fuel gases for high temperature fuel cells. The copper oxide is initially reduced in a preconditioning step to elemental copper and is present in a highly dispersed state throughout the zinc oxide which serves as a support as well as adding to the sulfur sorption capacity. The spent sorbent is regenerated by high-temperature treatment with an air fuel, air steam mixture followed by hydrogen reduction to remove and recover the sulfur.

Young, J.E.; Jalan, V.M.

1984-06-19T23:59:59.000Z

298

A Scheduling Algorithm for Consistent Monitoring Results with Solar Powered High-Performance Wireless Embedded Systems  

E-Print Network [OSTI]

A Scheduling Algorithm for Consistent Monitoring Results with Solar Powered High but critical task for solar powered wireless high power embedded systems. Our algorithm relies on an energy

Simunic, Tajana

299

The measurement of solubility and viscosity of oil/refrigerant mixtures; At high pressures and temperatures test facility and initial results for R-22/naphthenic oil mixtures  

SciTech Connect (OSTI)

The design and construction of a test facility for measuring the solubility and viscosity of lubricating oil/refrigerant mixtures at high pressures and temperatures are described. An auxiliary charging system, developed to provide precisely measured quantities of oil and refrigerant to the test facility, is also presented. Initial results for liquid mixtures of 10% to 40% R-22 (by mass) in a 150 SUS naphthenic oil are reported over the temperature range 70 {degrees} F (20{degrees}C) to 300 {degrees} F(150 {degrees}C). Good agreement with existing data from the open literature is obtained over the limited temperature range for which previously published data are available.

Van Gaalen, N.A.; Zoz, S.C.; Pate, M.B. (Dept. of Mechanical Engineering, Iowa State Univ., Ames, IA (US))

1990-01-01T23:59:59.000Z

300

Use of metal/uranium mixtures to explore data uncertainties  

SciTech Connect (OSTI)

A table of k{sub {infinity}} values for three homogenized metal/{sup 235}U systems calculated using both MCNP and the SCALE code system was presented in Ref. 3. The homogenized metal/{sup 235} U ratios were selected such that the MCNP analyses for each mixture provided k{sub {infinity}} {approx_equal} 1.0. The metals considered were Al, Zr, and Fe. These simplified systems were created in an effort to ease an investigation of discrepant results obtained using MCNP and SCALE to analyze large, dry systems of metal-clad, highly enriched fuel assemblies. Reference 3 has received considerable attention at ORNL and elsewhere because the reported k{sub {infinity}} values varied by as much as 38% between the MCNP results and those of SCALE. The ORNL approach was to analyze the systems using a broad range of codes and data and to seek an understanding of the discrepancies by studying differences in the basic data and processing methods. The continuous-energy codes and data applied in the ORNL study were (1) MCNP, using ENDF/B-V, ENDF/B-VI, and LANL data evaluations, (2) VIM, using ENDF/B-V data, and (3) MONK, using a 8,200-point library based on UKNDL evaluations and a preliminary JEF library. The VIM code provides treatment of unresolved resonances; MCNP does not. The MONK analyses provided a result using both an independent code and independent data evaluations. Although accessing continuous-energy data typically requires the use of Monte Carlo codes, 1-D deterministic codes can be used to accurately calculate K{sub {infinity}} values using a variety of multigroup data libraries and processing methods. The multigroup codes used in the study were MC and the CSAS1X sequence of the SCALE system. Both systems provide problem-dependent resonance processing of cross-section data and available fine-group libraries were used for the analyses. Broad-group libraries were not studied in any depth because there were non-readily available for intermediate-energy systems.

Parks, C.V.; Jordan, W.C.; Petrie, L.M.; Wright, R.Q.

1995-12-31T23:59:59.000Z

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


301

Assessment of damage by greenbug (Homoptera:Aphididae) to mixtures of resistant and susceptible Sorghum, Sorghum Bicolor (L.) Moench, hybrids as affected by natural enemies  

E-Print Network [OSTI]

. Greenbug abundance trends in greenhouse experiments suggested plant mixtures containing 25% or less resistant plants were less effective for managing greenbugs than those mixtures containing at least 50% resistant plants. Plants of all mixtures were...

Stewart, Klint Gilbert

2012-06-07T23:59:59.000Z

302

Numerical simulation of detonation structures using a thermodynamically consistent and fully conservative reactive flow model for multi-component computations  

Science Journals Connector (OSTI)

...there have been many advances in detonation modelling...apparent in figure 7 c. Recent experimental investigation...support by the Natural Sciences and Engineering Research...mixtures. In 42nd AIAA Aerospace Science Meeting and Exhibit...

2009-01-01T23:59:59.000Z

303

CO2-H2O Mixtures in the Geological Sequestration of CO2. II. Partitioning in Chloride Brines at 12-100 °C and 1-600 bar.  

Office of Scientific and Technical Information (OSTI)

CO CO 2 -H 2 O Mixtures in the Geological Sequestration of CO 2 . II. Partitioning in Chloride Brines at 12-100°C and up to 600 bar. Nicolas Spycher and Karsten Pruess Lawrence Berkeley National Laboratory, MS 90-1116, 1 Cyclotron Road, Berkeley, California, USA September 2004 ABSTRACT Correlations presented by Spycher et al. (2003) to compute the mutual solubilities of CO 2 and H 2 O are extended to include the effect of chloride salts in the aqueous phase. This is accomplished by including, in the original formulation, activity coefficients for aqueous CO 2 derived from several literature sources, primarily for NaCl solutions. Best results are obtained when combining the solubility correlations of Spycher et al. (2003) with the activity coefficient formulation of Rumpf et al. (1994) and Duan and Sun (2003), which

304

Efficiency of partial water removal during transmission of steam-water mixture on geothermal fields  

Science Journals Connector (OSTI)

The partial water removal from a steam-water mixture before transmission to prevent a pipeline from entering pulsation mode and to increase the flow of the heat carrier coming to the geothermal power plant is ...

A. N. Shulyupin

2007-10-01T23:59:59.000Z

305

one was tested, all reaction mixtures were supple-mented with an appropriate amount of ethanol  

E-Print Network [OSTI]

one was tested, all reaction mixtures were supple- mented with an appropriate amount of ethanol (5% v/v), because the menadione was dissolved in ethanol as a stock solution. The reaction was ini

Moorcroft, Paul R.

306

Detonation of propane-air mixtures under injection of hot detonation products  

Science Journals Connector (OSTI)

The tube for spontaneous detonation (Institute of Technical Physics, Russian Federal ... used to study the initiation and development of detonation in propane-air mixtures under injection of hot detonation produc...

V. I. Tarzhanov; I. V. Telichko; V. G. Vildanov

2006-05-01T23:59:59.000Z

307

Hydroconversion of polyethylene and tire rubber in a mixture with heavy oil residues  

Science Journals Connector (OSTI)

The results of studies on the processing of solid polymer wastes in a mixture with the heavy petroleum residues by hydroconversion with the use of the precursors of nanosized catalysts are given. It was found ...

Kh. M. Kadiev; A. U. Dandaev; A. M. Gyulmaliev; A. E. Batov

2013-03-01T23:59:59.000Z

308

Characterization of aggregate resistance to degradation in stone matrix asphalt mixtures  

E-Print Network [OSTI]

Stone matrix asphalt (SMA) mixtures rely on stone-on-stone contacts among particles to resist applied forces and permanent deformation. Aggregates in SMA should resist degradation (fracture and abrasion) under high stresses at the contact points...

Gatchalian, Dennis

2006-04-12T23:59:59.000Z

309

Hydrogen production from the reaction of solvated electrons with benzene in water-ammonia mixtures  

SciTech Connect (OSTI)

Product analysis data for the reaction of the ammoniated electron with benzene-water mixtures in liquid ammonia show that the dominant product is evolved hydrogen and not 1,4-cyclohexadiene.

Dewald, R.R.; Jones, S.R.; Schwartz, B.S.

1980-11-27T23:59:59.000Z

310

Evaluation of the filler effects on fatique cracking and permanent deformation of asphalt concrete mixtures  

E-Print Network [OSTI]

The addition of hydrated lime to asphalt has shown to be beneficial with an improvement in the Theological properties of the binder, as well as resistance to permanent deformation (rutting) and fatigue cracking of asphalt concrete mixtures...

Izzo, Richard P

1997-01-01T23:59:59.000Z

311

Adsorption and desorption of binary mixtures of volatile organic contaminants on soil  

E-Print Network [OSTI]

, the potential theory and the ideal adsorbed solution theory for mixture adsorption were also evaluated for prediction of the experimental results for binary adsorption. All models failed for prediction of the BET type III isotherms when methanol was present...

Guo, Yang

2012-06-07T23:59:59.000Z

312

Identification of an average temperature and a dynamical pressure in a multitemperature mixture of fluids  

E-Print Network [OSTI]

Identification of an average temperature and a dynamical pressure in a multitemperature mixture pressure even if the fluids have a zero bulk viscosity. The nonequilib- rium dynamical pressure can

Boyer, Edmond

313

Concentration dependence of vibrational properties of bioprotectant/water mixtures by inelastic neutron scattering  

Science Journals Connector (OSTI)

...water mixtures by inelastic neutron scattering S Magazu 1 * F Migliardo 1...LaboratoryChilton, Didcot,OX11 0QX, UK Neutron scattering has been demonstrated to be...to investigate by inelastic neutron scattering (INS) the vibrational behaviour...

2007-01-01T23:59:59.000Z

314

Reaction of CO/CO2 gas mixtures on NiYSZ cermet electrodes  

Science Journals Connector (OSTI)

The reaction of carbon monoxide/carbon dioxide mixtures on NiYSZ cermet electrodes was investigated as a function of the electrode potential and the partial pressures of the reactants at 1273 K. Time-dependen...

P. Holtappels; L. G. J. De Haart; U. Stimming

1999-05-01T23:59:59.000Z

315

Multifrequency Diagnostics of a Vibrationally Equilibrium CO2-Containing Gas Mixture  

Science Journals Connector (OSTI)

We present a technique which makes it possible to simultaneously determine the temperature T and the partial pressure of carbon dioxide in a vibrationally equilibrium gas mixture at atmospheric pressure by using ...

K. I. Arshinov; N. S. Leshenyuk; V. V. Nevdakh

2001-11-01T23:59:59.000Z

316

Kinetic Modeling of Gasoline Surrogate Components and Mixtures under Engine Conditions  

SciTech Connect (OSTI)

Real fuels are complex mixtures of thousands of hydrocarbon compounds including linear and branched paraffins, naphthenes, olefins and aromatics. It is generally agreed that their behavior can be effectively reproduced by simpler fuel surrogates containing a limited number of components. In this work, an improved version of the kinetic model by the authors is used to analyze the combustion behavior of several components relevant to gasoline surrogate formulation. Particular attention is devoted to linear and branched saturated hydrocarbons (PRF mixtures), olefins (1-hexene) and aromatics (toluene). Model predictions for pure components, binary mixtures and multicomponent gasoline surrogates are compared with recent experimental information collected in rapid compression machine, shock tube and jet stirred reactors covering a wide range of conditions pertinent to internal combustion engines (3-50 atm, 650-1200K, stoichiometric fuel/air mixtures). Simulation results are discussed focusing attention on the mixing effects of the fuel components.

Mehl, M; Pitz, W J; Westbrook, C K; Curran, H J

2010-01-11T23:59:59.000Z

317

A Coupled Micromechanical Model of Moisture-Induced Damage in Asphalt Mixtures: Formulation and Applications  

E-Print Network [OSTI]

The deleterious effect of moisture on the structural integrity of asphalt mixtures has been recognized as one of the main causes of early deterioration of asphalt pavements. This phenomenon, usually referred to as moisture damage, is defined...

Caro Spinel, Silvia

2011-02-22T23:59:59.000Z

318

The EM algorithm for the extended finite mixture of the factor analyzers model  

Science Journals Connector (OSTI)

This paper is devoted to extending common factors and categorical variables in the model of a finite mixture of factor analyzers based on the multivariate generalized linear model and the principle of maximum random utility in the probabilistic choice ...

Xingcai Zhou; Xinsheng Liu

2008-04-01T23:59:59.000Z

319

A visualization study of mixture preparation mechanisms for port fuel injected spark ignition engines  

E-Print Network [OSTI]

An experimental study was carried out that examined qualitatively the mixture preparation process in port fuel injected spark ignition engines. The primary variables in this study were intake valve lift, intake valve timing, ...

Costanzo, Vincent S. (Vincent Stanley), 1979-

2004-01-01T23:59:59.000Z

320

BEC Mixture in a Double well: Two species that may or may not get along  

E-Print Network [OSTI]

Balakrishnan, Institute of Mathematical Sciences: India Philip Naudus: GMU Indu Satija, George Mason, NIST Mark-BEC mixtures Coupled Gross-Pitaevskii equations: Interaction Parameters t iggV m a aaabaaa a = +++- h h

Satija, Indu

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


321

Hydrogen storage properties of Mg-based mixtures elaborated by reactive mechanical grinding  

Science Journals Connector (OSTI)

The hydrogen sorption properties of Mg + 10 wt% WO3 and Mg + 5 wt% Cr2O3 mixtures made by reactive (under hydrogen) mechanical grinding were studied and compared with those of elemental Mg subjected to a similar ...

J.-L. Bobet; B. Chevalier

2004-08-01T23:59:59.000Z

322

Syngas Production from Coal Gasification with CO2 Rich Gas Mixtures  

Science Journals Connector (OSTI)

Coal gasification with CO2 rich gas mixture is one of several promising new technologies associated with CO2 reduction in the atmosphere. Coal gasification with high CO2 concentration is suitable for producing la...

M. S. Alam; A. T. Wijayanta; K. Nakaso

2013-01-01T23:59:59.000Z

323

Laser ablation ignition of premixed methane and oxygen-enriched air mixtures using a tantalum target  

Science Journals Connector (OSTI)

We report the laser ablation ignition of premixed methane and oxygen-enriched air mixtures using a tantalum target. The minimum laser pulse energy (MPE) of the ablation ignition was...

Li, Xiaohui; Yu, Xin; Fan, Rongwei; Yu, Yang; Liu, Chang; Chen, Deying

2014-01-01T23:59:59.000Z

324

Laser ignition of flammable mixtures via a solid core optical fiber  

Science Journals Connector (OSTI)

To date no commercial fiber coupled laser systems have reached the irradiance and pulse energy required for flammable mixtures ignition. In this work we report preliminary results on the ignition of two-phase mix...

H. El-Rabii; G. Gaborel

2007-03-01T23:59:59.000Z

325

Density, Viscosity, Refractive Index and Conductivity of 1-Allyl-3-methylimidazolium Chloride + Water Mixture  

Science Journals Connector (OSTI)

Density, Viscosity, Refractive Index and Conductivity of 1-Allyl-3-methylimidazolium Chloride + Water Mixture ... The data obtained will play an important supplementary function in completion of the ionic liquids database. ...

Di Wu; Bo Wu; Yu M. Zhang; Hua P. Wang

2009-10-22T23:59:59.000Z

326

Heat Pipe Performance Enhancement with Binary Mixture Fluids that Exhibit Strong Concentration Marangoni Effects  

E-Print Network [OSTI]

on a flat-plate solar heat collector with integrated solarBinary Mixture Nucleate Boiling Heat Transfer CorrelationsG.E. , 1965, A study of heat transfer in nucleate pool

Armijo, Kenneth Miguel

2011-01-01T23:59:59.000Z

327

Experimental study on the fluorescence lifetime of ethanol-water mixtures  

Science Journals Connector (OSTI)

The ethanol-water mixtures can emit fluorescence when excited by the ultraviolet (UV) light, which is different from pure ethanol and water. There are three emission bands of the...

Liu, Ying; Li, Rongqing; Lan, Xiufeng; Shen, Zhonghua; Lu, Jian; Ni, Xiaowu

2005-01-01T23:59:59.000Z

328

Angular Dispersion-type Nonscanning Fabry-Perot Interferometer Applied to Ethanol-water Mixture  

Science Journals Connector (OSTI)

The angular dispersion-type non-scanning Fabry-Perot was applied to an ethanol-water mixture in order to investigate its acoustic properties such as the sound velocity and the...

Ko, Jae-Hyeon; Kojima, Seiji

2009-01-01T23:59:59.000Z

329

LOTEC: A Simple DSM Consistency Protocol for Nested Object Transactions Peter Graham and Yahong Sui  

E-Print Network [OSTI]

LOTEC: A Simple DSM Consistency Protocol for Nested Object Transactions Peter Graham and Yahong Sui Memory (DSM) consistency protocol for an unconventional but important application domain - object applications typically targetted by DSM system designers. While, after 10 years of performance enhancement

Graham, Peter

330

DSM-PM2: A portable implementation platform for multithreaded DSM consistency protocols  

E-Print Network [OSTI]

DSM-PM2: A portable implementation platform for multithreaded DSM consistency protocols Gabriel Antoniu and Luc Bougé Abstract DSM-PM2 is a platform for designing, implementing and experimenting multithreaded DSM consistency proto- cols. It provides a generic toolbox which facilitates protocol design

Paris-Sud XI, Université de

331

PHOTO-CONSISTENCY AND MULTIRESOLUTION METHODS FOR LIGHT FIELD DISPARITY ESTIMATION  

E-Print Network [OSTI]

PHOTO-CONSISTENCY AND MULTIRESOLUTION METHODS FOR LIGHT FIELD DISPARITY ESTIMATION Adam Bowen for light fields: a global method based on the idea of photo-consistency and a local method which employs. Experimental results demonstrate the effectiveness of the two methods as compared to other photo

Rajpoot, Nasir

332

AI Communications 17 (2004) 213221 213 An efficient consistency algorithm for the  

E-Print Network [OSTI]

) by modeling it as a meta- CSP, which is a finite CSP with a unique global constraint. The size of this global consistency algorithm for filtering the meta-CSP. This algorithm significantly reduces the domains of the variables of the meta-CSP without guaranteeing arc-consistency. We use AC as a preprocessing step to solving

Farritor, Shane

333

A consistent modelling methodology for secondary settling tanks in wastewater treatment  

E-Print Network [OSTI]

A consistent modelling methodology for secondary settling tanks in wastewater treatment Stefan on a consistent modelling methodology (CMM) of complex real processes in wastewater treatment by utilizing both as a case since this is one of the most complex processes in a wastewater treatment plant and the simulation

Bürger, Raimund

334

Physical properties of various soil mixtures used for golf green construction  

E-Print Network [OSTI]

amendments in soil mixtures for golf greens and concluded that peat moss seemed to be the most desirable amendment. Davis et al. (5) evaluated sands and amendments used for heavily traf- ficked turfgrass areas. Their findings indicated that ammoniated...) which was ground into pieces small enough to pass through a 2-mesh sieve, and R 6) Polyloam (PL), an artificial soil amendment. The organic amendments were: 1) peat moss (PM), and 2) ammoniated rice hulls (RH) Fourteen soil mixtures werc prepared...

Johns, Don

1976-01-01T23:59:59.000Z

335

Crystallization of Synthetic Coal?Petcoke Slag Mixtures Simulating Those Encountered in Entrained Bed Slagging Gasifiers  

Science Journals Connector (OSTI)

Crystallization of Synthetic Coal?Petcoke Slag Mixtures Simulating Those Encountered in Entrained Bed Slagging Gasifiers ... Commercial entrained bed slagging gasifiers use a carbon feedstock of coal, petcoke, or combinations of them to produce CO and H2. ... A hot-stage confocal scanning laser microscope (CSLM) was used to analyze the kinetic behavior of slag crystallization for a range of synthetic coal?petcoke mixtures. ...

Jinichiro Nakano; Seetharaman Sridhar; Tyler Moss; James Bennett; Kyei-Sing Kwong

2009-04-07T23:59:59.000Z

336

The effects of compaction of different golf green soil mixtures on plant growth  

E-Print Network [OSTI]

growth, removed prior Co compaction treatments, from mixtures of different sand- clay soll-peat rstlosoeoooeoo ~ ~ aeoaoae ~ o oo ~ o ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 7e An average of 2 clipping yields of top growth, removed after Che compaction and during...-clay soil-peat rs'tlos ~ a ~ eaoaoaeooaeeaa ~ o ~ aeea e ~ o ~ eaeoao ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ a ~ aooo 28 9e Differential effects of the different sand-clay soll-peat ratios of 5 particle size mixtures on yields of 2 clip plugs following Che compaction...

Kunze, Raymond John

2012-06-07T23:59:59.000Z

337

The determination of compressibility factors of gaseous butane-nitrogen mixtures in the gas phase  

E-Print Network [OSTI]

THE DETERMINATION OF COMPRESSIBILITY FACTORS OF GASEOUS BUTANE-NITROGEN MIXTURES IN THE GAS PHASE A D issertation By Robert Buckner Evans, III Approved as to style and content by: (Chairman of Committee) (Head of^ 'ent Advisor) June 1955... ?-; i'i i ; A R y ? 'A 'Gi- Or- T EX AS THE DETERMINATION OF COMHIESSIBILITI FACTORS OF GASEOUS BUTANE-NITROGEN MIXTURES IN THE GAS PHASE A D issertation By ROBERT BUCKNER EVANS, III Submitted' to the Graduate School of the Agricultural...

Evans, Robert Buckner

1955-01-01T23:59:59.000Z

338

Flume experiments on sediment mixtures from the offshore dredged material disposal site, Galveston Texas  

E-Print Network [OSTI]

FLUME EXP RIMENTS ON SED IliENT MIXTURES FROM 1'HE OFFSHORE DREDGED MATERIAL DISPOSAL SITE, GALVESTON, TEXAS A Thesis by ANTHONX JOSEPH MOHEREK Submitted t. o th' Graduate Co1lege of Iexas Atli University in partial Fulfillment... of the requirement for tht degree of MASTER OF SC:ENCE August 1977 Major Sub. :e . t: Oceanograghy FLUME EXPERIMENTS ON SEDIMENT MIXTURES FROM THE OFFSHORE DREDGED MATERIAL DISPOSAL SITE, GALVESTON, TEXAS A Thesis by ANTHONY JOSEPH MOHEREK Approved...

Moherek, Anthony Joseph

2012-06-07T23:59:59.000Z

339

Use of computed X-ray tomographic data for analyzing the thermodynamics of a dissociating porous sand/hydrate mixture  

SciTech Connect (OSTI)

X-ray computed tomography (CT) is a method that has been used extensively in laboratory experiments for measuring rock properties and fluid transport behavior. More recently, CT scanning has been applied successfully to detect the presence and study the behavior of naturally occurring hydrates. In this study, we used a modified medical CT scanner to image and analyze the progression of a dissociation front in a synthetic methane hydrate/sand mixture. The sample was initially scanned under conditions at which the hydrate is stable (atmospheric pressure and liquid nitrogen temperature, 77 K). The end of the sample holder was then exposed to the ambient air, and the core was continuously scanned as dissociation occurred in response to the rising temperature. CT imaging captured the advancing dissociation front clearly and accurately. The evolved gas volume was monitored as a function of time. Measured by CT, the advancing hydrate dissociation front was modeled as a thermal conduction problem explicitly incorporating the enthalpy of dissociation, using the Stefan moving-boundary-value approach. The assumptions needed to perform the analysis consisted of temperatures at the model boundaries. The estimated value for thermal conductivity of 2.6 W/m K for the remaining water ice/sand mixture is higher than expected based on conduction alone; this high value may represent a lumped parameter that incorporates the processes of heat conduction, methane gas convection, and any kinetic effects that occur during dissociation. The technique presented here has broad implications for future laboratory and field testing that incorporates geophysical techniques to monitor gas hydrate dissociation.

Freifeld, Barry M.; Kneafsey, Timothy J.; Tomutsa, Liviu; Stern, Laura A.; Kirby, Stephen H.

2002-02-28T23:59:59.000Z

340

Use of Computed X-ray Tomographic Data for Analyzing the Thermodynamics of a Dissociating Porous Sand/Hydrate Mixture  

DOE R&D Accomplishments [OSTI]

X-ray computed tomography (CT) is a method that has been used extensively in laboratory experiments for measuring rock properties and fluid transport behavior. More recently, CT scanning has been applied successfully to detect the presence and study the behavior of naturally occurring hydrates. In this study, we used a modified medical CT scanner to image and analyze the progression of a dissociation front in a synthetic methane hydrate/sand mixture. The sample was initially scanned under conditions at which the hydrate is stable (atmospheric pressure and liquid nitrogen temperature, 77 K). The end of the sample holder was then exposed to the ambient air, and the core was continuously scanned as dissociation occurred in response to the rising temperature. CT imaging captured the advancing dissociation front clearly and accurately. The evolved gas volume was monitored as a function of time. Measured by CT, the advancing hydrate dissociation front was modeled as a thermal conduction problem explicitly incorporating the enthalpy of dissociation, using the Stefan moving-boundary-value approach. The assumptions needed to perform the analysis consisted of temperatures at the model boundaries. The estimated value for thermal conductivity of 2.6 W/m K for the remaining water ice/sand mixture is higher than expected based on conduction alone; this high value may represent a lumped parameter that incorporates the processes of heat conduction, methane gas convection, and any kinetic effects that occur during dissociation. The technique presented here has broad implications for future laboratory and field testing that incorporates geophysical techniques to monitor gas hydrate dissociation.

Freifeld, Barry M.; Kneafsey, Timothy J.; Tomutsa, Liviu; Stern, Laura A.; Kirby, Stephen H.

2002-02-28T23:59:59.000Z

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


341

Smoke consisting of mixtures of dust and industrial pollution covering the Forbidden City, Beijing, China. BY K.-M. LAU, V. RAMANATHAN, G.-X. WU, Z. LI, S. C. TSAY, C. HSU, R. SIKKA, B. HOLBEN, D. LU,  

E-Print Network [OSTI]

-related problems associated with worsening air quality and has also impacted aviation safety. Recent field the physical processes responsible for aerosol­ monsoon water cycle interactions is fundamental to improving) regions have found that anthropogenic aerosols may signifi- cantly change the energy balance

Chin, Mian

342

Low energy consumption method for separating gaseous mixtures and in particular for medium purity oxygen production  

DOE Patents [OSTI]

A method for the separation of gaseous mixtures such as air and for producing medium purity oxygen, comprising compressing the gaseous mixture in a first compressor to about 3.9-4.1 atmospheres pressure, passing said compressed gaseous mixture in heat exchange relationship with sub-ambient temperature gaseous nitrogen, dividing the cooled, pressurized gaseous mixture into first and second streams, introducing the first stream into the high pressure chamber of a double rectification column, separating the gaseous mixture in the rectification column into a liquid oxygen-enriched stream and a gaseous nitrogen stream and supplying the gaseous nitrogen stream for cooling the compressed gaseous mixture, removing the liquid oxygen-enriched stream from the low pressure chamber of the rectification column and pumping the liquid, oxygen-enriched steam to a predetermined pressure, cooling the second stream, condensing the cooled second stream and evaporating the oxygen-enriched stream in an evaporator-condenser, delivering the condensed second stream to the high pressure chamber of the rectification column, and heating the oxygen-enriched stream and blending the oxygen-enriched stream with a compressed blend-air stream to the desired oxygen concentration.

Jujasz, Albert J. (North Olmsted, OH); Burkhart, James A. (Olmsted Falls, OH); Greenberg, Ralph (New York, NY)

1988-01-01T23:59:59.000Z

343

Effect of silane concentration on the supersonic combustion of a silane/methane mixture  

SciTech Connect (OSTI)

A series of direct connect combustor tests was conducted to determine the effect of silane concentration on the supersonic combustion characteristics of silane/methane mixtures. Shock tube ignition delay data indicated more than an order of magnitude reduction in ignition delay times for both 10 and 20 percent silane/methane mixtures as compared to methane. The ignition delay time of the 10 percent mixture was only a factor of 2.3 greater than that of the 20 percent mixture. Supersonic combustion tests were conducted with the fuel injected into a model scramjet combustor. The combustor was mounted at the exit of a Mach 2 nozzle and a hydrogen fired heater was used to provide a variation in test gas total temperature. Tests using the 20 percent silane/methane mixture indicated considerable combustion enhancement when compared to methane alone. This mixture had an autoignition total temperature of 1650 R. The addition of 20 percent silane to methane resulted in a pyrophoric fuel with good supersonic combustion performance. Reducing the silane concentration below this level, however, yielded a less pyrophoric fuel that exhibited poor supersonic combustion performance.

Northam, G.B.; Mc Lain, A.G.; Pellett, G.L.; Diskin, G.S.

1986-01-01T23:59:59.000Z

344

Chemical contaminants on DOE lands and selection of contaminant mixtures for subsurface science research  

SciTech Connect (OSTI)

This report identifies individual contaminants and contaminant mixtures that have been measured in the ground at 91 waste sites at 18 US Department of Energy (DOE) facilities within the weapons complex. The inventory of chemicals and mixtures was used to identify generic chemical mixtures to be used by DOE's Subsurface Science Program in basic research on the subsurface geochemical and microbiological behavior of mixed contaminants (DOE 1990a and b). The generic mixtures contain specific radionuclides, metals, organic ligands, organic solvents, fuel hydrocarbons, and polychlorinated biphenyls (PCBs) in various binary and ternary combinations. The mixtures are representative of in-ground contaminant associations at DOE facilities that are likely to exhibit complex geochemical behavior as a result of intercontaminant reactions and/or microbiologic activity stimulated by organic substances. Use of the generic mixtures will focus research on important mixed contaminants that are likely to be long-term problems at DOE sites and that will require cleanup or remediation. The report provides information on the frequency of associations among different chemicals and compound classes at DOE waste sites that require remediation.

Riley, R.G.; Zachara, J.M. (Pacific Northwest Lab., Richland, WA (United States))

1992-04-01T23:59:59.000Z

345

Induction of CYP 1A enzyme activity and genotoxicity from ternary mixtures of produced water relvant compounds, evaluated by in vitro methods.  

E-Print Network [OSTI]

??Produced water is a complex mixture discharged to sea in high volumes containing compounds at low concentrations. Compounds in mixtures can modify each other?s expected (more)

Strdal, Ingvild Fladvad

2011-01-01T23:59:59.000Z

346

The Galapagos Plume from a primarily geochemical perspective  

E-Print Network [OSTI]

the Galapagos Hotspot at c. 90 Ma? e.g. Duncan & Hargraves, 1984; Sinton et al., 1998; Hauff et al., 2000

Geist, Dennis

347

Near-infrared photodetector consisting of J-aggregating cyanine dye and metal oxide thin films  

E-Print Network [OSTI]

We demonstrate a near-infrared photodetector that consists of a thin film of the J-aggregating cyanine dye, U3, and transparent metal-oxide charge transport layers. The high absorption coefficient of the U3 film, combined ...

Osedach, Timothy P.

348

Effect of twinning on texture evolution of depleted uranium using a viscoplastic self-consistent model.  

E-Print Network [OSTI]

??Texture evolution of depleted uranium is investigated using a viscoplastic self-consistent model. Depleted uranium, which has the same structure as alpha-uranium, is difficult to model (more)

Ho, John

2012-01-01T23:59:59.000Z

349

Knowledge acquisition, consistency checking and concurrency control for Gene Ontology (GO)  

Science Journals Connector (OSTI)

......University Press 2003 Original Paper Knowledge acquisition, consistency checking and...for communicating biological data and knowledge. The Gene Ontology (GO; http...paper, we assess the applicability of a Knowledge Base Management System (KBMS), Protege-2000......

Iwei Yeh; Peter D. Karp; Natalya F. Noy; Russ B. Altman

2003-01-01T23:59:59.000Z

350

Are water simulation models consistent with steady-state and ultrafast vibrational spectroscopy experiments?  

E-Print Network [OSTI]

Are water simulation models consistent with steady-state and ultrafast vibrational spectroscopy, United States b Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, United States c Department of Chemistry, Stanford University, Stanford, CA 94305, United States Received

Fayer, Michael D.

351

Suppressing Multi-Channel Ultra-Low-Field MRI Measurement Noise Using Data Consistency and Image  

E-Print Network [OSTI]

SQUID sensors demonstrate the effectiveness of this data consistency constraint and sparsity prior-mail: fhlin@ntu.edu.tw Introduction MRI has become an indispensible resource in clinical medicine because

352

Data Consistency for Self-acting Load Balancing of Parallel File System  

Science Journals Connector (OSTI)

With the increasing scale of I/O servers, nice load balancing algorithm among I/O servers is ... problem, we have proposed a self-acting load balancing strategy. In this paper, data consistency between I/O server...

Li Guoying; Dong Bin; Li Xiuqiao; Wu Qimeng

2012-01-01T23:59:59.000Z

353

Self-consistent modeling of radio-frequency plasma generation in stellarators  

Science Journals Connector (OSTI)

A self-consistent model of radio-frequency (RF) plasma generation in stellarators in the ion cyclotron frequency range is described. The model includes equations ... of electron energy balance takes into account ...

V. E. Moiseenko; Yu. S. Stadnik; A. I. Lysoivan; V. B. Korovin

2013-11-01T23:59:59.000Z

354

MODIS Consistent Vegetation Parameter Specifications and Their Impacts on Regional Climate Simulations  

Science Journals Connector (OSTI)

A consistent set of Moderate Resolution Imaging Spectroradiometer (MODIS) vegetation parameters, including leaf and stem area index (LAI and SAI, respectively), land-cover category (LCC), fractional vegetation cover (FVC), and albedo ...

Min Xu; Xin-Zhong Liang; Arthur Samel; Wei Gao

2014-11-01T23:59:59.000Z

355

Statistical Separability and the Consistency between Quantum Theory, Relativity and the Causality  

E-Print Network [OSTI]

We show that the non-locality together with the statistical character makes the world statistically separable. The super-luminal signal transmission is impossible. The quantum theory is therefore consistent with the relativity and the causality.

Qi-Ren Zhang

2005-12-19T23:59:59.000Z

356

Precision and consistency of contour interpolation Jacqueline M. Fulvio a,*, Manish Singh b  

E-Print Network [OSTI]

Precision and consistency of contour interpolation Jacqueline M. Fulvio a,*, Manish Singh b-mail address: jmf384@nyu.edu (J.M. Fulvio). www.elsevier.com/locate/visres Available online at www

Singh, Manish

357

Building America Webinar: Standardized Retrofit Packages What Works to Meet Consistent Levels of Performance?  

Broader source: Energy.gov [DOE]

This webinar will focus on specific Building America projects that have examined methods to consistently meet high levels of energy performance in existing homes, with a focus on retrofit packages that can be replicated across many homes.

358

Stability and Internal Consistency of the Offer Self-Image Questionnaire: A Study of Finnish Adolescents  

Science Journals Connector (OSTI)

Reliability of the Offer Self-Image Questionnaire (OSIQ) was assessed with two measuresinternal consistency and stabilityin Finnish children aged 13. The OSIQ was administered to 268 normal 13-...

Eila Laukkanen; Pirjo Halonen; Heimo Viinamki

1999-02-01T23:59:59.000Z

359

Quasiparticle lifetimes in magnesium clusters modeled by self-consistent GW? calculations  

E-Print Network [OSTI]

Quasiparticle (QP) lifetimes in magnesium clusters are calculated using many-body Green's-function theory. We analyze the effect of the self-consistency of the one-particle Green's function G on the calculations and ...

He, Yi

360

Managing the use of style guides in an organisational setting: practical lessons in ensuring UI consistency  

Science Journals Connector (OSTI)

......designs consistent with the general characteristics of an environment. Such guides are...seminars, distribution using the Corporate Intranet, and establishing discussion bulletin...17] R. Bernard, The Corporate Intranet, Wiley, New York, 1996. [18] A......

Nichole Simpson

1999-01-01T23:59:59.000Z

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


361

Effective Mass Matrix for Light Neutrinos Consistent with Solar and Atmospheric Neutrino Experiments  

E-Print Network [OSTI]

We propose an effective mass matrix for light neutrinos which is consistent with the mixing pattern indicated by solar and atmospheric neutrino experiments. Two scenarios for the mass eigenvalues are discussed and the connection with double beta decay is noted.

S. P. Rosen; Waikwok Kwong

1995-01-20T23:59:59.000Z

362

Globally convergent trust-region methods for self-consistent field electronic structure calculations  

E-Print Network [OSTI]

Globally convergent trust-region methods for self-consistent field electronic structure calculations Juliano B. Franciscoa) Department of Applied Mathematics, IMECC-UNICAMP, State University calculations, the reliability of the algorithms used becomes increasingly important. Trust-region strategies

Martínez, José Mario

363

Validation of and enhancements to an operating-speed-based geometric design consistency evaluation model  

E-Print Network [OSTI]

This thesis documents efforts to validate two elements related to an operating-speed-based geometric design consistency evaluation procedure: (1) the speed reduction estimation ability of the model, and (2) assumptions about acceleration...

Collins, Kent Michael

1995-01-01T23:59:59.000Z

364

Design consistency and driver error as reflected by driver workload and accident rates  

E-Print Network [OSTI]

DESIGN CONSISTENCY AND DRIVER ERROR AS REFLECTED BY DRIVER WORKLOAD AND ACCIDENT RATES A Thesis by MARK DOUGLAS WOOLDRIDGE Approved as to style and content by: Daniel B. Fambro (Chair of Committee) Raymond A. Krammes (Member) Olga J.... Pendleton (Member) James T. P. Yao (Head of Department) May 1992 ABSTRACT Design Consistency and Driver Error as Reflected by Driver Workload and Accident Rates (May 1992) Mark Douglas Wooldridge, B. S. , Texas A&M University Chair of Advisory...

Wooldridge, Mark Douglas

2012-06-07T23:59:59.000Z

365

Relating geometric design consistency and accident experience on two-lane rural highways  

E-Print Network [OSTI]

and accident experience on two-lane rural highways. Safety, operational, and driver behavioral studies were reviewed and compared to the concepts of the Messer procedure and other design consistency studies. This was done to critically evaluate the Messer... and one-half years of data. A variable called the effective workload value EWL derived from the Messer procedure was established as the measure of consistency used for analysis. The effective workload value and accident experience were used as input...

Glascock, Stephen Wade

2012-06-07T23:59:59.000Z

366

Gas-liquid-liquid equilibria in mixtures of water, light gases, and hydrocarbons  

SciTech Connect (OSTI)

Phase equilibrium in mixtures of water + light gases and water + heavy hydrocarbons has been investigated with the development of new local composition theory, new equations of state, and new experimental data. The preferential segregation and orientation of molecules due to different energies of molecular interaction has been simulated with square well molecules. Extensive simulation has been made for pure square well fluids and mixtures to find the local composition at wide ranges of states. A theory of local composition has been developed and an equation of state has been obtained for square well fluids. The new local composition theory has been embedded in several equations of state. The pressure of water is decoupled into a polar pressure and non-polar pressure according to the molecular model of water of Jorgensen et al. The polar pressure of water is combined with the BACK equation for the general description of polar fluids and their mixtures. Being derived from the steam table, the Augmented BACK equation is particularly suited for mixtures of water + non-polar substances such as the hydrocarbons. The hydrophobic character of the hydrocarbons had made their mixtures with water a special challenge. A new group contribution equation of state is developed to describe phase equilibrium and volumetric behavior of fluids while requiring only to know the molecular structure of the components. 15 refs., 1 fig.

Chao, K.C.

1990-01-01T23:59:59.000Z

367

Construction of an embankment with a fly and bottom ash mixture: field performance study  

SciTech Connect (OSTI)

Fly ash and bottom ash are coal combustion by-products (CCBPs) that are generated in large quantities throughout the world. It is often economical to dispose ash as mixtures rather than separately; that notwithstanding, only a few studies have been performed to investigate the behavior of fly and bottom ash mixtures, particularly those with high contents of fly ash. Also, there is very limited data available in the literature on the field performance of structures constructed using ash mixtures. This paper describes the construction and the instrumentation of a demonstration embankment built with an ash mixture (60:40 by weight of fly ash:bottom ash) on State Road 641, Terre Haute, Ind. Monitoring of the demonstration embankment was conducted for a period of 1 year from the start of construction of the embankment. The settlement of the embankment stabilized approximately 5 months after the end of its construction. According to horizontal inclinometer readings, the differential settlement at the top of the embankment is about 5 mm. Results from field quality control tests performed during construction of the demonstration embankment and monitoring data from vertical and horizontal inclinometers and settlement plates indicate that the ash mixture investigated can be considered an acceptable embankment construction material.

Yoon, S.; Balunaini, U.; Yildirim, I.Z.; Prezzi, M.; Siddiki, N.Z. [Louisiana Transportation Research Center, Baton Rouge, LA (United States)

2009-06-15T23:59:59.000Z

368

Influence of steam on the flammability limits of premixed natural gas/oxygen/steam mixtures  

Science Journals Connector (OSTI)

Synthesis gas (Syngas) is an intermediate in a variety of industrial processes. Its production is energy and capital intensive and any improvement of existing technologies allowing simpler and economic production is of great interest. Recently, a new method known as short contact time-catalytic partial oxidation (SCT-CPO) has been developed into a commercial technology [14]. SCT-CPO is an entirely heterogeneous catalytic process converting premixed flammable feedstocks inside a very small reactor. In order to ensure safety and a high selectivity towards CO and H2 it has been important to determine and understand flammability properties of the gaseous reactant mixtures. Here we report on the results obtained within a windowed tube reactor equipped with multiple photodetectors and pressure transducers that has allowed the study of ignition, flame propagation, and explosion characteristics of gas mixtures similar to those used as reactants in the SCT-CPO reactor. The tests were conducted at various pressures with different amounts of steam and two different compositions of natural gas (NG). A flammability boundary for each mixture, based on normalized pressure and mole fraction of steam, was determined. The results conclude that these mixtures flammability could be suppressed in two very different ways. Depending on the adiabatic flame temperature of the mixture, suppression could be caused by steam's chemical influence increasing chain-termination or by a large amount of steam decreasing the reaction zone temperature.

Matthew J. Degges; J. Eric Boyer; Kenneth K. Kuo; Luca Basini

2010-01-01T23:59:59.000Z

369

Reflections on new directions for risk assessment of environmental chemical mixtures  

Science Journals Connector (OSTI)

Currently risk assessment of chemicals tackles them as single substances affecting individual health endpoints. In reality, human exposure occurs to mixtures of chemicals, as they are present in the environment and consumer products. Combining the information from environmental fate analysis, epidemiological data and toxicokinetic/dynamic models helps estimate internal exposure. Coupling these data with gene and protein expression profiles as signatures of exposure to classes of toxicants to derive biologically-based dose-response estimates may open the way towards adopting a biological connectivity approach to risk assessment. This work gives examples of applications of this approach on combined exposure to mixtures of volatile organic chemicals and estimation of body burden from chronic exposure to mixtures of chemicals and of the associated health risk. Conclusions are drawn as to the future scientific developments that will meet the requirements of integrated health risk assessment to protect public health from environmental and consumption-related stressors.

D. Sarigiannis; A. Gotti; G. Cimino Reale; E. Marafante

2009-01-01T23:59:59.000Z

370

Apparatus and method for operating internal combustion engines from variable mixtures of gaseous fuels  

DOE Patents [OSTI]

An apparatus and method for utilizing any arbitrary mixture ratio of multiple fuel gases having differing combustion characteristics, such as natural gas and hydrogen gas, within an internal combustion engine. The gaseous fuel composition ratio is first sensed, such as by thermal conductivity, infrared signature, sound propagation speed, or equivalent mixture differentiation mechanisms and combinations thereof which are utilized as input(s) to a "multiple map" engine control module which modulates selected operating parameters of the engine, such as fuel injection and ignition timing, in response to the proportions of fuel gases available so that the engine operates correctly and at high efficiency irrespective of the gas mixture ratio being utilized. As a result, an engine configured according to the teachings of the present invention may be fueled from at least two different fuel sources without admixing constraints.

Heffel, James W. (Lake Matthews, CA); Scott, Paul B. (Northridge, CA); Park, Chan Seung (Yorba Linda, CA)

2011-11-01T23:59:59.000Z

371

Laboratory flammability studies of mixtures of hydrogen, nitrous oxide, and air  

SciTech Connect (OSTI)

At the request of the Department of Energy and the Westinghouse Hanford Company, the Bureau of Mines has investigated the flammability of mixtures of hydrogen, nitrous oxide, and air. This work is relevant to the possible hazards of flammable gas generation from nuclear waste tanks at Hanford, WA. The tests were performed in a 120-L spherical chamber under both quiescent and turbulent conditions using both electric spark and pyrotechnic ignition sources. The data reported here for binary mixtures of hydrogen in air generally confirm the data of previous investigators, but they are more comprehensive than those reported previously. The results clarify to a greater extent the complications associated with buoyancy, turbulence, and selective diffusion. The data reported here for ternary mixtures of hydrogen and nitrous oxide in air indicate that small additions of nitrous oxide (relative to the amount of air) have little effect, but that higher concentrations of nitrous oxide (relative to air) significantly increase the explosion hazard.

Cashdollar, K L; Hertzberg, M; Zlochower, I A; Lucci, C E; Green, G M; Thomas, R A [Bureau of Mines, Pittsburgh, PA (United States). Pittsburgh Research Center

1992-06-26T23:59:59.000Z

372

Dissipative dynamics of the Josephson effect in binary Bose-Einstein-condensed mixtures  

SciTech Connect (OSTI)

The dissipative dynamics of a pointlike Josephson junction in binary Bose-Einstein-condensed mixtures is analyzed within the framework of the model of a tunneling Hamiltonian. The transmission of unlike particles across a junction is described by the different transmission amplitudes. The effective action that describes the dynamics of the phase differences across the junction for each of two condensed components is derived by employing the functional integration method. In the low-frequency limit the dynamics of a Josephson junction can be described by two coupled equations in terms of the potential energy and dissipative Rayleigh function using a mechanical analogy. The interplay between mass currents of each mixture component appears in the second-order term in the tunneling amplitudes due to the interspecies hybridizing interaction. The asymmetric case of the binary mixtures with different concentrations and order parameters is considered as well.

Burmistrov, S. N. [Kurchatov Institute, RU-123182 Moscow (Russian Federation)

2011-06-15T23:59:59.000Z

373

Observation of crystallization slowdown in supercooled para-hydrogen and ortho-deuterium quantum liquid mixtures  

E-Print Network [OSTI]

We report a quantitative experimental study of the crystallization kinetics of supercooled quantum liquid mixtures of para-hydrogen (pH$_2$) and ortho-deuterium (oD$_2$) by high spatial resolution Raman spectroscopy of liquid microjets. We show that in a wide range of compositions the crystallization rate of the isotopic mixtures is significantly reduced with respect to that of the pure substances. To clarify this behavior we have performed path-integral simulations of the non-equilibrium pH$_2$-oD$_2$ liquid mixtures, revealing that differences in quantum delocalization between the two isotopic species translate into different effective particle sizes. Our results provide first experimental evidence for crystallization slowdown of quantum origin, offering a benchmark for theoretical studies of quantum behavior in supercooled liquids.

Matthias Khnel; Jos M. Fernndez; Filippo Tramonto; Guzmn Tejeda; Elena Moreno; Anton Kalinin; Marco Nava; Davide E. Galli; Salvador Montero; Robert E. Grisenti

2014-10-10T23:59:59.000Z

374

Sedimentation stacking diagram of binary colloidal mixtures and bulk phases in the plane of chemical potentials  

E-Print Network [OSTI]

We give a full account of a recently proposed theory that explicitly relates the bulk phase diagram of a binary colloidal mixture to its phase stacking phenomenology under gravity [Soft Matter 9, 8636 (2013)]. As we demonstrate, the full set of possible phase stacking sequences in sedimentation-diffusion equilibrium originates from straight lines (sedimentation paths) in the chemical potential representation of the bulk phase diagram. From the analysis of various standard topologies of bulk phase diagrams, we conclude that the corresponding sedimentation stacking diagrams can be very rich, even more so when finite sample height is taken into account. We apply the theory to obtain the stacking diagram of a mixture of nonadsorbing polymers and colloids. We also present a catalog of generic phase diagrams in the plane of chemical potentials in order to facilitate the practical application of our concept, which also generalizes to multi component mixtures.

Daniel de las Heras; Matthias Schmidt

2014-11-19T23:59:59.000Z

375

Analysis of zeotropic mixtures used in high-temperature Organic Rankine cycle  

Science Journals Connector (OSTI)

Abstract The paper investigates the performance of high-temperature Organic Rankine cycle (ORC) with zeotropic mixtures as working fluid. A numerical model, which has been validated by comparing with the published data, is developed to predict the first law thermal efficiency of the cycle. The effects of mixture concentration, temperature gradient of the heat transfer fluid, pinch temperature difference, pressure ratio, and condensation pressure on the first law efficiency are presented firstly using a purposely designed program, and then the suitable conditions for the described ORC are suggested based on the results of the simulation. It is demonstrated that the use of zeotropic mixtures leads to an efficiency increase compared to pure fluids.

Bensi Dong; Guoqiang Xu; Yi Cai; Haiwang Li

2014-01-01T23:59:59.000Z

376

Evaluation of Type B shipping packages used to transport potentially flammable gas mixtures  

SciTech Connect (OSTI)

Using Type B shipping packages to transport radioactive materials within a potentially flammable gas mixture is a bold proposal. The Nuclear Regulatory Commission (NRC) has essentially prohibited such shipments. Furthermore, the NRC requires extensive modeling and/or testing of selective contents (e.g., Transuranic Waste) which are prone to generate hydrogen gas to demonstrate that, in general, a flammable mixture inside the containment vessel will not occur during shipment. Contrary to the NRC position, this paper proposes a rigorous containment vessel evaluation methodology to justify shipment of Type B quantities of radioactive materials in the presence of potentially flammable gas mixtures. The Department of Energy (DOE) is currently reviewing the methodology as applied to the 9975 package for shipment of plutonium oxide which may generate significant quantities of hydrogen gas.

Hensel, S.J.

2000-04-26T23:59:59.000Z

377

Evaluation of thermodynamic properties of fluid mixtures by PC-SAFT model  

Science Journals Connector (OSTI)

Abstract Densities and viscosities of binary mixtures of methyl isobutyl ketone (MIK) with polar solvents namely, 2-propanol, 2-butanol and 2-pentanol, were measured at 7 temperatures (293.15323.15K) over the entire range of composition. Using the experimental data, excess molar volumes V m E , isobaric thermal expansivity ? p , partial molar volumes V m , i and viscosity deviations ? ? , have been calculated due to their importance in the study of specific molecular interactions. The observed negative and positive values of deviation/excess parameters were explained on the basis of the intermolecular interactions occur in these mixtures. The Perturbed Chain Statistical Association Fluid Theory (PC-SAFT) has been used to correlate the volumetric behavior of the mixtures.

Mohammad Almasi

2014-01-01T23:59:59.000Z

378

Phonon exchange in dilute Fermi-Bose mixtures: Tailoring the Fermi-Fermi interaction  

Science Journals Connector (OSTI)

We consider a mixture of a single-component Bose gas and a two-component Fermi gas at temperatures where the Bose gas is almost fully condensed. In such a mixture, two fermionic atoms can interact with each other by exchanging a phonon that propagates through the Bose condensate. We calculate the interaction potential due to this mechanism, and determine the effective s-wave scattering length for two fermions that interact, both directly by the interatomic potentials as well as by the above-mentioned exchange mechanism. We find that the effective scattering length is quite sensitive to changes in the condensate density, and becomes strongly energy dependent. In addition, we consider the mechanical stability of these mixtures, and also calculate the dispersion and the damping of the various collisionless collective modes of the gas.

M. J. Bijlsma; B. A. Heringa; H. T. C. Stoof

2000-04-05T23:59:59.000Z

379

Phase separation and collapse in Bose-Fermi mixtures with a Feshbach resonance  

Science Journals Connector (OSTI)

We consider a mixture of single-component bosonic and fermionic atoms with an interspecies interaction that is varied using a Feshbach resonance. By performing a mean-field analysis of a two-channel model, which describes both narrow and broad Feshbach resonances, we find an unexpectedly rich phase diagram at zero temperature: Bose-condensed and non-Bose-condensed phases form a variety of phase-separated states that are accompanied by both critical and tricritical points. We discuss the implications of our results for the experimentally observed collapse of Bose-Fermi mixtures on the attractive side of the Feshbach resonance, and we make predictions for future experiments on Bose-Fermi mixtures close to a Feshbach resonance.

Francesca M. Marchetti; Charles J. M. Mathy; David A. Huse; Meera M. Parish

2008-10-14T23:59:59.000Z

380

An on-line acoustic fluorocarbon coolant mixture analyzer for the ATLAS silicon tracker  

SciTech Connect (OSTI)

The ATLAS silicon tracker community foresees an upgrade from the present octafluoro-propane (C{sub 3}F{sub 8}) evaporative cooling fluid - to a composite fluid with a probable 10-20% admixture of hexafluoro-ethane (C{sub 2}F{sub 6}). Such a fluid will allow a lower evaporation temperature and will afford the tracker silicon substrates a better safety margin against leakage current-induced thermal runaway caused by cumulative radiation damage as the luminosity profile at the CERN Large Hadron Collider increases. Central to the use of this new fluid is a new custom-developed speed-of-sound instrument for continuous real-time measurement of the C{sub 3}F{sub 8}/C{sub 2}F{sub 6} mixture ratio and flow. An acoustic vapour mixture analyzer/flow meter with new custom electronics allowing ultrasonic frequency transmission through gas mixtures has been developed for this application. Synchronous with the emission of an ultrasound 'chirp' from an acoustic transmitter, a fast readout clock (40 MHz) is started. The clock is stopped on receipt of an above threshold sound pulse at the receiver. Sound is alternately transmitted parallel and anti-parallel with the vapour flow for volume flow measurement from transducers that can serve as acoustic transmitters or receivers. In the development version, continuous real-time measurement of C{sub 3}F{sub 8}/C{sub 2}F{sub 6} flow and calculation of the mixture ratio is performed within a graphical user interface developed in PVSS-II, the Supervisory, Control and Data Acquisition standard chosen for LHC and its experiments at CERN. The described instrument has numerous potential applications - including refrigerant leak detection, the analysis of hydrocarbons, vapour mixtures for semiconductor manufacture and anesthetic gas mixtures. (authors)

Bates, R. [Dept. of Physics and Astronomy, Univ. of Glasgow, G12 8QQ (United Kingdom); Battistin, M. [CERN, 1211 Geneva 23 (Switzerland); Berry, S.; Bitadze, A. [Dept. of Physics and Astronomy, Univ. of Glasgow, G12 8QQ (United Kingdom); Bonneau, P. [CERN, 1211 Geneva 23 (Switzerland); Bousson, N. [Centre de Physique des Particules de Marseille, 163 Avenue de Luminy, 13288 Marseille Cedex 09 (France); Boyd, G. [Dept. of Physics and Astronomy, Univ. of Oklahoma, Norman, OK 73019 (United States); Botelho-Direito, J.; DiGirolamo, B. [CERN, 1211 Geneva 23 (Switzerland); Doubek, M. [Czech Technical Univ., Technicka 4, 166 07 Prague 6 (Czech Republic); Egorov, K. [Physics Dept., Indiana Univ., Bloomington, IN 47405 (United States); Godlewski, J. [CERN, 1211 Geneva 23 (Switzerland); Hallewell, G. [Centre de Physique des Particules de Marseille, 163 Avenue de Luminy, 13288 Marseille Cedex 09 (France); Katunin, S. [B.P. Konstantinov Petersburg Nuclear Physics Inst. PNPI, 188300 St. Petersburg (Russian Federation); Mathieu, M.; McMahon, S. [Rutherford Appelton Laboratory - Science and Technology Facilities Council, Chilton, Didcot OX11 OQX (United Kingdom); Nagai, K. [Graduate School of Pure and Applied Sciences, Univ. of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577 (Japan); Perez-Rodriguez, E. [CERN, 1211 Geneva 23 (Switzerland); Rozanov, A. [Centre de Physique des Particules de Marseille, 163 Avenue de Luminy, 13288 Marseille Cedex 09 (France); Vacek, V.; Vitek, M. [Czech Technical Univ., Technicka 4, 166 07 Prague 6 (Czech Republic)

2011-07-01T23:59:59.000Z

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


381

Three path interference using nuclear magnetic resonance: a test of the consistency of Born's rule  

E-Print Network [OSTI]

The Born rule is at the foundation of quantum mechanics and transforms our classical way of understanding probabilities by predicting that interference occurs between pairs of independent paths of a single object. One consequence of the Born rule is that three way (or three paths) quantum interference does not exist. In order to test the consistency of the Born rule, we examine detection probabilities in three path intereference using an ensemble of spin-1/2 quantum registers in liquid state nuclear magnetic resonance (LSNMR). As a measure of the consistency, we evaluate the ratio of three way interference to two way interference. Our experiment bounded the ratio to the order of $10^{-3} \\pm 10^{-3}$, and hence it is consistent with Born's rule.

Daniel K. Park; Osama Moussa; Raymond Laflamme

2012-07-10T23:59:59.000Z

382

R&D to Prepare and Characterize Robust Coal/Biomass Mixtures for Direct Co-Feeding into Gasification  

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

to Prepare and Characterize Robust to Prepare and Characterize Robust Coal/Biomass Mixtures for Direct Co-Feeding into Gasification Background Domestically abundant coal is a significant primary energy source and, when mixed with optimum levels of biomass, has lower carbon footprint compared to conventional petroleum fuels. Coal and biomass mixtures are converted via gasification into synthesis gas (syngas), a mixture of predominantly carbon monoxide and hydrogen, which can be subsequently converted to produce liquid fuels and

383

Phase-separation in ion-containing mixtures in electric fields  

E-Print Network [OSTI]

When a liquid mixture is subjected to external electric fields, ionic screening leads to field gradients. We point out that if the mixture is initially in the homogeneous phase, this screening can bring about a robust phase-separation transition with two main features: (i) the phase separation is expected to occur in any electrode geometry, and (ii) the voltage required is typically of the order of 1 V and even less. We discuss several applications of the effect relevant to the field of microfluidics, focusing on the creation of a nanometer-scale lubrication layer in the phase-separation process.

Yoav Tsori; Ludwik Leibler

2007-03-26T23:59:59.000Z

384

The thermodynamic properties of mixtures of normal octane and branched paraffin hydrocarbons  

E-Print Network [OSTI]

to that predicated by Raoult's law. Eight years later, Nyers (17) measured the vapor- liquid equilibrium data of eighteen binary hydrocarbon mixtures containing naphthene, paraffin and aromatic bina- ry mixtures at 760 mm Hg absolute pressure by using a vapor..., it was shown that the five paraffin-aromatic systems have the greatest deviation from ideality, with activity coeffi- cients ranging from 1. 3 to 1. 8. For the naphthene-aro- matic systems, activity coefficients are slightly lower, varying from 1. 2 to 1. 4...

Liu, Edward Kou-Shan

1975-01-01T23:59:59.000Z

385

Roughage and roughage substitutes in high concentrate finishing mixtures for beef cattle  

E-Print Network [OSTI]

different levels of roughage, showed that maximum levels of 20 to 30% cottonseed hulls, 20 to 30% coastal bermuda hay, 10 to 20/o rice hulls (ammoniated or non-ammoniated) or 10/o flax shives should be used in finishing mixtures if high gain and feed... into four uniform groups on the basis of weight and grade. These groups received four different feed mixtures as follows: all concentrate, 2 and 4%%uo oyster shell flakes and 10% ammoniated rice hulls. The second and third experiments were part of Texas...

Leigh, Jorge Eduardo

1968-01-01T23:59:59.000Z

386

Effects of CH4, H2 and CO2 Mixtures on SI Gas Engine  

Science Journals Connector (OSTI)

Abstract Performance of a four-stroke spark ignition gas engine operated on mixtures of CH4, H2 and CO2 was studied. Experiments were carried out at a constant engine speed of 2,000rpm and throttle opening of 14% with various equivalence ratios. The results showed that the highest brake power output of 12.5kW and 35% thermal efficiency were achieved when operated with the mixture of 69.70% CH4, 9.95% H2 and 20.45% CO2 and the equivalence ratios between 1.0 and 0.82.

S. Chuayboon; S. Prasertsan; T. Theppaya; K. Maliwan; P. Prasertsan

2014-01-01T23:59:59.000Z

387

Tunneling dynamics and phase transition of a Bose-Fermi mixture in a double well  

Science Journals Connector (OSTI)

The coherent nonlinear tunneling dynamics of a boson-fermion mixture in a double-well potential is studied in this paper. Four types of phase are found for the mixture. The first one is two species localizing in different potential wells. The second one is two species coexisting in the same well. The third one is two species equally populated in two wells. The fourth one is one species equally populated in two wells while the other species is in one well. The phase transitions among these four states have been investigated. The interspecies and intraspecies interactions as well as bosonic and fermionic numbers can dramatically affect these phase transitions.

Peng-Tang Qi and Wen-Shan Duan

2011-09-22T23:59:59.000Z

388

The determination of compressibility factors of gaseous propane-nitrogen mixtures  

E-Print Network [OSTI]

LIBRARY A A N O'iLLEOE OF 1EXAS THE DETERMINATION OF COMPRESSIBILITY FACTORS OF GASEOUS PROPANE-NITROGEIN MIXTURES A Thesis Cecil Herman Dickson Submitted to the Graduate School of the Agricultural and Mechanical College of' Texas in partial... f'ulf'illment of the requirements for the de~ree of MASTER OF SCIENCE Ma]or GubjectI Chemistry May I&55 THE DETERMINATION OF COMPRESSIBILITY FACTORS OF GASEOUS PROPANE-NITROGEN MIXTURES A Thesis Cecil Herman Dickson Approved as to style...

Dickson, Cecil Herman

2012-06-07T23:59:59.000Z

389

Mixture for producing fracture-resistant, fiber-reinforced ceramic material by microwave heating  

DOE Patents [OSTI]

A fracture-resistant, fiber-reinforced ceramic substrate is produced by a method which involves preparing a ceramic precursor mixture comprising glass material, a coupling agent, and resilient fibers, and then exposing the mixture to microwave energy. The microwave field orients the fibers in the resulting ceramic material in a desired pattern wherein heat later generated in or on the substrate can be dissipated in a desired geometric pattern parallel to the fiber pattern. Additionally, the shunt capacitance of the fracture-resistant, fiber-reinforced ceramic substrate is lower which provides for a quicker transit time for electronic pulses in any conducting pathway etched into the ceramic substrate.

Meek, T.T.; Blake, R.D.

1985-04-03T23:59:59.000Z

390

Mixture for producing fracture-resistant, fiber-reinforced ceramic material by microwave heating  

DOE Patents [OSTI]

A fracture-resistant, fiber-reinforced ceramic substrate is produced by a method which involves preparing a ceramic precursor mixture comprising glass material, a coupling agent, and resilient fibers, and then exposing the mixture to microwave energy. The microwave field orients the fibers in the resulting ceramic material in a desired pattern wherein heat later generated in or on the substrate can be dissipated in a desired geometric pattern parallel to the fiber pattern. Additionally, the shunt capacitance of the fracture-resistant, fiber-reinforced ceramic substrate is lower which provides for a quicker transit time for electronic pulses in any conducting pathway etched into the ceramic substrate. 2 figs.

Meek, T.T.; Blake, R.D.

1987-09-22T23:59:59.000Z

391

Mixture for producing fracture-resistant, fiber-reinforced ceramic material by microwave heating  

DOE Patents [OSTI]

A fracture-resistant, fiber-reinforced ceramic substrate is produced by a method which involves preparing a ceramic precursor mixture comprising glass material, a coupling agent, and resilient fibers, and then exposing the mixture to microwave energy. The microwave field orients the fibers in the resulting ceramic material in a desired pattern wherein heat later generated in or on the substrate can be dissipated in a desired geometric pattern parallel to the fiber pattern. Additionally, the shunt capacitance of the fracture-resistant, fiber-reinforced ceramic substrate is lower which provides for a quicker transit time for electronic pulses in any conducting pathway etched into the ceramic substrate.

Meek, Thomas T. (Los Alamos, NM); Blake, Rodger D. (Santa Fe, NM)

1987-01-01T23:59:59.000Z

392

New gas mixtures suitable for rare event detection using a Micromegas-TPC detector  

E-Print Network [OSTI]

The aim of the presented work was to develop further techniques based on a Micromegas-TPC, in order to reach a high gas gain with good energy resolution, and to search for gas mixtures suitable for rare event detection. This paper focuses on xenon, which is convenient for the search of neutrinoless double beta decay in 136 Xe. Conversely, a small admixture of xenon to CF 4 can reduce attachment in the latter. This gas mixture would be suitable for dark matter searches and the study of solar and reactor neutrinos. Various configurations of the Micromegas plane were investigated and are described.

L. Ounalli; J-L. Vuilleumier; D. Schenker; J-M. Vuilleumier

2008-12-29T23:59:59.000Z

393

Determination of the mutagenic potential of individual and binary mixtures of polycyclic aromatic and nitroaromatic hydrocarbons  

E-Print Network [OSTI]

). iv Based on these pure results, fair binary mixtures were chosen; BAP/BEP, BAP/1NP, BAP/DMBA, and BEP/DMBA. For the mixtures? a mutagenic interaction ratio (MIR) was calculated. Using two doses of pure chemicals, boundaries between inhibitive.../Response Curve for BEP 21 5. 6 Dose/Response Curve for 1NP 5. 7. Dose/Response Curve for DMBA 5. 8. Dose/Response Curve for 2NF 5. 9. Dose/Response Curve for BA 5. 10. Dose/Response Curve for FA 5. 11. Dose/Response Curve for CH 22 24 25 26 27 29...

Keller, Tracie A

2012-06-07T23:59:59.000Z

394

Dispersion of concentrated aqueous neodymiayttriaalumina mixture with ammonium poly(acrylic acid) as dispersant  

Science Journals Connector (OSTI)

A stable aqueous slurry using ammonium polyacrylic acid polyelectrolyte as dispersant and a neodymiayttriaalumina mixture was prepared as the starting powder. The effect of the polyelectrolyte concentration and the pH of the slurry on the stability of the suspension is studied, and the optimal pH value and the amount of dispersant needed to obtain a stable slurry were determined. Highly consistent slurries with optimal pH and dispersant concentration were prepared by ball milling. The rheological behavior of the slip with different solid loading (4858wt.%) has been studied by measuring the viscosity and shear stress as a function of shear rate. Slip with solid loadings of 53wt.% shows near-Newtonian behavior but becomes non-Newtonian with typical shear-thinning behavior above this solid loading value. The density and microstructure of the cast product bears a direct relationship to the state of the slip induced by variation of the pH and the concentration of the dispersant as well as by solid loading. Transparent Nd:YAG ceramics were obtained by sintering of compacts prepared from optimized slurries at 1750C in vacuum.

Yaohui Lv; Wei Zhang; Jie Tan; Yuanhua Sang; Haiming Qin; Jinlian Hu; Liuniu Tong; Hong Liu; Jiyang Wang; Robert I Boughton

2011-01-01T23:59:59.000Z

395

Artificial neural network as an applicable tool to predict the binary heat capacity of mixtures containing ionic liquids  

Science Journals Connector (OSTI)

Ionic liquids (ILs) are amazing solvents gain an increasingly attention in the different areas of chemistry and chemical engineering industries during the past decade. Similar to every promising solvent, knowing the physiochemical properties of the \\{ILs\\} seems to be crucial to develop new designed \\{ILs\\} based industries. In this direction, the present study extends an artificial neural network (ANN) to correlate the binary heat capacity of ILs. To verify the proposed network, 1571 binary heat capacity data points were collected from the previously published literatures and divided in to two subsets namely training and testing subsets. The optimum parameters of the network including the number of hidden layer, numbers of neurons and transfer functions in hidden and output layers were obtained using these subsets data points. In addition, the predictive capability of the optimized network was validated using the testing data points (not considered in the training stage). The optimized network configuration consisted of one hidden layer with sixteen neurons and tansig and purelin transfer functions for the hidden and output layers. The obtained results from the training and test stages show that the proposed network was able to accurately predict the binary heat capacity of \\{ILs\\} binary mixtures with total absolute average relative deviation (AARD%) of 1.60% and relation coefficient (R2) value of 0.9975.

Mostafa Lashkarbolooki; Ali Zeinolabedini Hezave; Shahab Ayatollahi

2012-01-01T23:59:59.000Z

396

A correlated K-distribution model of the heating rates for H[sub 2]O and a molecular mixture in the 0-2500 cm[sup [minus]1] wavelength region in the atmosphere between 0 and 60 km  

SciTech Connect (OSTI)

For this report a prototype infrared radiative transfer model using a correlated k-distribution technique to calculate the transmission between atmospheric levels has been used to calculate the radiative fluxes and heating rates for H[sub 2]O and a mixture of the major molecular absorbers in the atmosphere between 0 and 60 km. The mixture consists of H[sub 2]O, CO[sub 2], O[sub 3], CH[sub 4], and N[sub 2]O. The wave number range considered is 0-2500 cm[sup [minus]1]. The use of the k-distribution method allows 25 cm[sup [minus]1] wave number bins to produce fluxes and heating rates which are within ten percent of the results of detailed line by line calculations.

Grossman, A S; Grant, K E

1992-11-16T23:59:59.000Z

397

Using of the tunable CO2-laser without frequency stabilization for diagnostics of CO2 gas mixture at barometric pressure  

Science Journals Connector (OSTI)

It is presented a technique for determining temperature and pressure of CO2 in gas mixture using absorption factor spectral distribution. Errors calculated for tunable frequency...

Arshinov, K

398

Verification of universal surface scaling behavior in critical binary liquid mixtures with neutron and x-ray reflectometry.  

E-Print Network [OSTI]

??We have studied two critical binary liquid mixtures in the mixed phase regime with x-ray and neutron reflectometry to verify universal critical scaling at a (more)

Brown, Matthew D.

2007-01-01T23:59:59.000Z

399

A Generalization of Generalized Arc Consistency: From Constraint Satisfaction to Constraint-Based Inference  

E-Print Network [OSTI]

-binary classic con- straint satisfaction problems (CSPs). Based on the Semiring CSP and Valued CSP frameworks CSP, probabilistic CSP, max CSP, and weighted CSP. This extension is based on an idempotent satisfaction problem (CSP), local consistency can be characterized as deriving new constraints based on local

Mackworth, Alan K.

400

CSPs and complexity An instance of the constraint satisfaction problem (CSP) consists of a set of  

E-Print Network [OSTI]

CSPs and complexity An instance of the constraint satisfaction problem (CSP) consists of a set to the variables in a way so that all constraints are (simultaneously) satisfied. The general CSP is NP-complete. However, when the CSP is restricted to a fixed constraint language (a set of allowed constraint

Zhao, Yuxiao

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


401

Changing System Interfaces Consistently: a New Refinement Strategy for CSP B  

E-Print Network [OSTI]

Changing System Interfaces Consistently: a New Refinement Strategy for CSP B Steve Schneider refinement in the context of CSP B. Our motivation to include this notion of refinement within the CSP B to change the events of a CSP process and the B machines when refining a system. Notions of refinement based

Doran, Simon J.

402

(Smart) Look-Ahead Arc Consistency and the Pursuit of CSP Tractability  

E-Print Network [OSTI]

(Smart) Look-Ahead Arc Consistency and the Pursuit of CSP Tractability Hubie Chen 1 and V#19. The constraint satisfaction problem (CSP) can be formu- lated as the problem of deciding, given a pair (A; B) of relational struc- tures, whether or not there is a homomorphism from A to B. Although the CSP is in general

Dalmau, Victor

403

Coupled nonequilibrium growth equations: Self-consistent mode coupling using vertex renormalization  

Science Journals Connector (OSTI)

We find that studying the simplest of the coupled nonequilibrium growth equations of Barabasi by self-consistent mode coupling requires the use of dressed vertices. Using the vertex renormalization, we find a roughening exponent which already in the leading order is quite close to the numerical value.

Amit Kr. Chattopadhyay; Abhik Basu; Jayanta K. Bhattacharjee

2000-02-01T23:59:59.000Z

404

Hamiltonian description of self-consistent wave-particle dynamics in a periodic Frederic Andre,1,  

E-Print Network [OSTI]

of the electron, self-acceleration and acausality, also appear incompatible with the existence of a wellHamiltonian description of self-consistent wave-particle dynamics in a periodic structure Fr conserves energy and excludes self-acceleration. A complete Hamiltonian formulation results from adding

Paris-Sud XI, Université de

405

Optimizing Repair Programs for Consistent Query Answering Monica Caniupan and Leopoldo Bertossi  

E-Print Network [OSTI]

, a logic programming system that implements the stable models semantics, in particular. We also analyze be restored minimally by inserting Q(a) or elim- inating S(a). The repair program contains the following 1Optimizing Repair Programs for Consistent Query Answering Monica Caniupan and Leopoldo Bertossi

Bertossi, Leopoldo

406

Functional designed to include surface effects in self-consistent density functional theory R. Armiento1,  

E-Print Network [OSTI]

Functional designed to include surface effects in self-consistent density functional theory R 2005 We design a density-functional-theory DFT exchange-correlation functional that enables an accurate density functional theory1 DFT is a method for electronic structure calculations of unparalleled

Armiento, Rickard

407

Chaos detection tools: application to a self-consistent triaxial model  

Science Journals Connector (OSTI)

......B1900FWA, Buenos Aires, Argentina Together with the variational...spaces for different energy levels of a self-consistent...Fig.-10 for every energy surface. Then, the...22 per cent in the energy surface-0.05 per...Tecnicas de la Republica Argentina (CCT-La Plata) and......

N. P. Maffione; L. A. Darriba; P. M. Cincotta; C. M. Giordano

2013-01-01T23:59:59.000Z

408

Nuclear Databases: National Resource Nuclear databases consists of carefully organized scientific  

E-Print Network [OSTI]

Nuclear Databases: National Resource Nuclear databases consists of carefully organized scientific information that has been gathered over 50 years of low-energy nuclear physics research worldwide. These powerful databases have enormous value and they represent a genuine national resource. Six core nuclear

Ohta, Shigemi

409

OPPENHEIM CONJECTURE FOR PAIRS CONSISTING OF A LINEAR FORM AND A QUADRATIC FORM  

E-Print Network [OSTI]

OPPENHEIM CONJECTURE FOR PAIRS CONSISTING OF A LINEAR FORM AND A QUADRATIC FORM ALEXANDER GORODNIK. As a generalization of the Oppenheim conjecture, we prove that the set {(Q(x), L(x)) : x Zd } is dense in R2 provided of author's PhD thesis at Ohio State University done under supervision of Prof. Bergelson. 1 #12;OPPENHEIM

Gorodnik, Alexander

410

OPPENHEIM CONJECTURE FOR PAIRS CONSISTING OF A LINEAR FORM AND A QUADRATIC FORM  

E-Print Network [OSTI]

OPPENHEIM CONJECTURE FOR PAIRS CONSISTING OF A LINEAR FORM AND A QUADRATIC of the Oppenheim conjecture, we prov* *e that the set {(Q(x), L(x)) : x 2 Zd} is dense in R2provided that Q; OPPENHEIM CONJECTURE FOR PAIRS 2 It is easy to see that the second condition

Gorodnik, Alexander

411

Consistent Comparison of Macroscopic and State-to-State Kinetics in Hypersonic Flows  

E-Print Network [OSTI]

Consistent Comparison of Macroscopic and State-to-State Kinetics in Hypersonic Flows Gianpiero of Chemistry, Bari, 70126, Italy We present a comparison of numerical results in strongly expanding hypersonic variable in non-equilibrium condi- tions, per unit mass I. Introduction In supersonic and hypersonic flows

D'Ambrosio, Domenic

412

Checking Consistency of C and Verilog using Predicate Abstraction and Induction  

E-Print Network [OSTI]

consistency between an ANSI- C program and a circuit given in Verilog using Predicate Abstraction to existing tools that perform predicate abstraction, our approach is SAT-based and allows all ANSI Abstraction, Verilog, SAT, Equivalence Checking #12;1 Introduction ANSI-C is a language designed for best

413

Improving the Performance of Mass-Consistent Numerical Models Using Optimization Techniques  

Science Journals Connector (OSTI)

This paper describes a technique of using a mass-consistent model to derive wind speeds over a microscale region (about 4 km2) of complex terrain. A serious limitation of these numerical models is that the calculated wind field is highly ...

J. C. Barnard; H. L. Wegley; T. R. Hiester

1987-06-01T23:59:59.000Z

414

Hydrological consistency using multi-sensor remote sensing data for water and energy cycle studies  

E-Print Network [OSTI]

Hydrological consistency using multi-sensor remote sensing data for water and energy cycle studies and feedback of land surface and atmospheric processes over large space and time scales. Remote sensing-based variables including soil moisture (from AMSR-E), surface heat fluxes (from MODIS) and precipitation rates

Pan, Ming

415

Frequency-dependent payoffs and sequential decision-making favour consistent tactic use  

Science Journals Connector (OSTI)

...order in which animals enter a foraging area, consistently...intrinsic differences in terms of genetic quality [16...be at a disadvantage in terms of assessing their environment...the producer tactic and search for unexploited resources...order in which animals enter a foraging area influences...

2012-01-01T23:59:59.000Z

416

Self-Consistent Calculation of Electron Transport in a Cylindrical Hall Thruster  

E-Print Network [OSTI]

Self-Consistent Calculation of Electron Transport in a Cylindrical Hall Thruster Lubos Brieda electron transport in the Princeton Cylindrical Hall thruster using a one-dimensional electron kinetic code on electron conduction across magnetic field lines being driven by electron collisions with heavy particles

417

ADAPTIVE REGULARIZED SELF-CONSISTENT FIELD ITERATION WITH EXACT HESSIAN FOR ELECTRONIC STRUCTURE CALCULATION  

E-Print Network [OSTI]

18, 65K10, 65F15, 90C26, 90C30 1. Introduction. Electronic structure calculations have becomeADAPTIVE REGULARIZED SELF-CONSISTENT FIELD ITERATION WITH EXACT HESSIAN FOR ELECTRONIC STRUCTURE CALCULATION ZAIWEN WEN, ANDRE MILZAREK, MICHAEL ULBRICH, AND HONGCHAO ZHANG� Abstract. The self

Ulbrich, Michael

418

A consistent modelling methodology for secondary settling tanks in wastewater treatment  

E-Print Network [OSTI]

A consistent modelling methodology for secondary settling tanks in wastewater treatment Raimund Bu in wastewater treatment by combining classical concepts with results from applied mathematics, and partly was chosen as a case since this is one of the most complex processes in a wastewater treatment plant

Bürger, Raimund

419

A formal approach to enforcing consistency in self-adaptive systems  

Science Journals Connector (OSTI)

The ability of systems to adapt is increasingly seen as a necessary underlying capability for modern software systems. The resulting self-adaptive systems are not only supposed to cope with changes, but must also preserve their consistency. To deal with ...

Najla Hadj Kacem; Ahmed Hadj Kacem; Khalil Drira

2010-08-01T23:59:59.000Z

420

Effects of prenatal exposure to a low dose atrazine metabolite mixture on pubertal timing and prostate development of male Long-Evans rats  

SciTech Connect (OSTI)

The present study examines the postnatal reproductive development of male rats following prenatal exposure to an atrazine metabolite mixture (AMM) consisting of the herbicide atrazine and its environmental metabolites diaminochlorotriazine, hydroxyatrazine, deethylatrazine, and deisopropylatrazine. Pregnant Long-Evans rats were treated by gavage with 0.09, 0.87, or 8.73 mg AMM/kg body weight (BW), vehicle, or 100 mg ATR/kg BW positive control, on gestation days 15 19. Preputial separation was significantly delayed in 0.87 mg and 8.73 mg AMM-exposed males. AMM-exposed males demonstrated a significant treatment-related increase in incidence and severity of inflammation in the prostate on postnatal day (PND) 120. A dose-dependent increase in epididymal fat masses and prostate foci were grossly visible in AMM-exposed offspring. These results indicate that a short, late prenatal exposure to mixture of chlorotriazine metabolites can cause chronic prostatitis in male LE rats. The mode of action for these effects is presently unclear.

Stanko, Jason [National Institute of Environmental Health Sciences (NIEHS); Enoch, Rolondo [North Carolina Central University, Durham; Rayner, Jennifer L [ORNL; Davis, Christine [U.S. Environmental Protection Agency; Wolf, Douglas [U.S. Environmental Protection Agency; Malarkey, David [University of North Carolina, Chapel Hill; Fenton, Suzanne [National Institute of Environmental Health Sciences (NIEHS)

2010-12-01T23:59:59.000Z

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


421

COARSENING AND SELF-ORGANIZATION IN DILUTE DIBLOCK COPOLYMER MELTS AND MIXTURES  

E-Print Network [OSTI]

COARSENING AND SELF-ORGANIZATION IN DILUTE DIBLOCK COPOLYMER MELTS AND MIXTURES KARL GLASNER RUSTUM, on the other hand, is responsible for producing self-organized patterns. We construct approximations based upon incompatible [9]. Block copoly- mers, on the other hand, are inhomogeneous chain molecules composed of two

Glasner, Karl B.

422

Pattern selection near the onset of convection in binary mixtures in cylindrical  

E-Print Network [OSTI]

via a subcritical Hopf bifurcation, are considered. We focus on the dynamics in the neighbourhood ratio mixtures water or He3 - He4 . In this case, the heavier component mechanisms of instability typically gives rise to a subcritical Hopf bifurcation of the conduction state

Marques, Francisco

423

Vesicle Formation of a 1:1 Catanionic Surfactant Mixture in Ethanol Solution  

E-Print Network [OSTI]

Vesicle Formation of a 1:1 Catanionic Surfactant Mixture in Ethanol Solution J.-B. Huang,* B on the liposome of natural phospho- lipids.10,11 As for the situation in ethanol solution, early studies showed that ethanol addition deteriorates the molecular order in lipid bilayers,12-16 although a small amount

Huang, Jianbin

424

A simplified procedure for estimation of mixture permeances from unary permeation data  

SciTech Connect (OSTI)

Using the MaxwellStefan (MS) diffusion equations as a basis, we derive simple analytic expression for the estimation of component permeances of mixtures across micro- and mesoporous membranes on the basis of unary permeation data. The analytic procedure uses two simplifying assumptions: (1) downstream pressures are negligibly small in comparison to upstream pressures, and (2) adsorption equilibrium within the pores can be described by Henry law coefficients. Two limiting scenarios are considered in estimating the MS exchange coefficients, {sub ij}: (1) correlations negligible, and (2) correlations dominant. In the correlations negligible scenario, the permeances of each component in the mixture equal that of the corresponding pure components. For the correlations dominant scenario, the permeances in the mixture are significantly different from the pure component values; the differences being dictated not only by mobilities of the species within the pores, but also by the adsorption equilibrium. The results of this study underlines the strong influence of diffusional correlations on the mixture permeances and permeation selectivities.

Krishna, Rajamani; van Baten, Jasper M

2011-01-01T23:59:59.000Z

425

Experimental study of combustion of hydrogensyngas/methane fuel mixtures in a porous burner  

Science Journals Connector (OSTI)

Lean premixed combustion of hydrogensyngas/methane fuel mixtures was investigated experimentally to demonstrate fuel flexibility of a two-section porous burner. The un-insulated burner was operated at atmospheric pressure. Combustion was stabilized at the interface of silicon-carbide coated carbon foam of 26 pores per centimeter (ppcm) and 4ppcm. Methane (CH4) content in the fuel was decreased from 100% to 0% (by volume), with the remaining amount split equally between carbon monoxide (CO) and hydrogen (H2), the two reactive components of the syngas. Experiments for different fuel mixtures were conducted at a fixed air flow rate, while the fuel flow rate was varied to obtain a range of adiabatic flame temperatures. The CO and nitric oxide ( NO x ) emissions were measured downstream of the porous burner, in the axial direction to identify the post-combustion zone and in the transverse direction to quantify combustion uniformity. For a given adiabatic flame temperature, increasing H2/CO content in the fuel mixture decreased both the CO and NO x emissions. Presence of H2/CO in the fuel mixture also decreased temperature near the lean blow-off limit, especially for higher percentages of CO and H2 in the fuel.

S.K. Alavandi; A.K. Agrawal

2008-01-01T23:59:59.000Z

426

High figure-of-merit nematic mixtures based on totally unsaturated isothiocyanate liquid crystals  

E-Print Network [OSTI]

. 1. Introduction The continuous demand for faster electro-optic response times is the driving force of figure-of-merit were observed at room temperature for the formulated nematic mixtures. Potential phased arrays (OPAs) for laser communications, require faster response times. In order to achieve a fast

Wu, Shin-Tson

427

Commissioning of a magnetic suspension densitometer for high-accuracy density measurements of natural gas mixtures  

E-Print Network [OSTI]

densitometer has been used to measure densities of two simulated natural gas mixtures named M91C1 and M94C1 after validating its operation by measuring densities of pure argon, nitrogen and methane in the range (270 to 340) K [(26.33 to152.33) oF, (-3.15 to 66...

Patil, Prashant Vithal

2009-05-15T23:59:59.000Z

428

Automatic isochoric apparatus for PVT and phase equilibrium studies of natural gas mixtures  

E-Print Network [OSTI]

We have developed a new automatic apparatus for the measurement of the phase equilibrium and pVT properties of natural gas mixtures in our laboratory. Based on the isochoric method, the apparatus can operate at temperature from 200 K to 500 K...

Zhou, Jingjun

2009-05-15T23:59:59.000Z

429

Reconstitution of a Thermostable Xylan-Degrading Enzyme Mixture from the Bacterium Caldicellulosiruptor bescii  

Science Journals Connector (OSTI)

...Reconstitution of a Thermostable Xylan-Degrading Enzyme Mixture from...Xylose, the major constituent of xylans, as well as the side chain...Sun and H Zhao. 2010. Yeast surface display of trifunctional minicellulosomes...Enzymatic deconstruction of xylan for biofuel production. Glob...

Xiaoyun Su; Yejun Han; Dylan Dodd; Young Hwan Moon; Shosuke Yoshida; Roderick I. Mackie; Isaac K. O. Cann

2012-12-21T23:59:59.000Z

430

Henry's law, surface tension, and surface adsorption in dilute binary mixtures  

E-Print Network [OSTI]

Henry's law, surface tension, and surface adsorption in dilute binary mixtures Akira Onukia. The solute partitioning between gas and liquid Henry's law and the surface tension change are discussed fraction X and the temperature-derivative / T cx,p of the surface tension at fixed pressure p

431

Analyzing the temporal variation of wind turbine responses using Gaussian Mixture Model and Gaussian Discriminant Analysis  

E-Print Network [OSTI]

1 Analyzing the temporal variation of wind turbine responses using Gaussian Mixture Model characteristics have a significant impact on the structural response and the lifespan of wind turbines. This paper presents a machine learning approach towards analyzing and predicting the response of a wind turbine

Stanford University

432

Inverting Ultrasonic Data on Solid/Fluid Mixtures for BiotGassmann Parameters  

E-Print Network [OSTI]

Inverting Ultrasonic Data on Solid/Fluid Mixtures for Biot­Gassmann Parameters James G. Berryman Geophysics Department Stanford University Stanford, CA 94305­2215 #12; Inverting Ultrasonic Data on Solid, the values of the slopes are smaller than expected for some rocks. Therefore, the process of inverting

433

PHYSICAL REVIEW A 87, 012703 (2013) Feshbach-molecule formation in a Bose-Fermi mixture  

E-Print Network [OSTI]

-degenerate Fermi gas of polar molecules would be an important step toward achieving novel quantum phases of matter molecules with a conversion efficiency as high as 45%. In the limit of fast magnetic sweeps and small of bosonic molecules from either Bose or Fermi gases. However, for quantum degenerate atom gas mixtures, we

Jin, Deborah

434

Spectroscopic Diagnostics of Barrier Discharge Plasmas in Mixtures of Zinc Diiodide with Inert Gases  

SciTech Connect (OSTI)

The spectral characteristics of the emission of gas discharge atmospheric pressure plasmas in mixtures of zinc diiodide vapor with inert gases (He, Ne, Ar, Kr, and Xe) are investigated. The formation of a gas discharge plasma and the excitation of the components of a working mixture were performed in a high-frequency (with a repetition frequency of sinusoidal voltage pulses of 100 kHz) barrier discharge. The gas discharge emission was analyzed in the spectral range 200-900 nm with a resolution of 0.05 nm. Emission bands of ZnI(B-X) exciplex molecules and I*{sub 2} excimer molecules, lines of inert gases, and emission bands of XeI* exciplex molecules (in Xe-containing mixtures) were revealed. It is ascertained that the strongest emission of ZnI* molecules is observed in ZnI{sub 2}/He(Ne) mixtures. The regularities in the spectral characteristics of the gas discharge plasma emission are considered.

Guivan, N.N.; Malinin, A.N. [Uzhgorod National University, Uzhgorod, 88000 (Ukraine)

2005-11-15T23:59:59.000Z

435

Analysis of Steam Heating of a Two-Layer TBP/N-Paraffin/Nitric Acid Mixtures  

SciTech Connect (OSTI)

This report presents an analysis of steam heating of a two-layer tri-n-butyl phosphate (TBP)/n-paraffin-nitric acid mixture.The purpose of this study is to determine if the degree of mixing provided by the steam jet or by bubbles generated by the TBP/nitric acid reaction is sufficient to prevent a runaway reaction.

Laurinat, J.E. [Westinghouse Savannah River Company, AIKEN, SC (United States); Hassan, N.M.; Rudisill, T.S.; Askew, N.M.

1998-07-22T23:59:59.000Z

436

Clathrate hydrate equilibrium data for the gas mixture of carbon dioxide and nitrogen in the  

E-Print Network [OSTI]

1 Clathrate hydrate equilibrium data for the gas mixture of carbon dioxide and nitrogen the mole fraction of CO2 in the carbon dioxide + nitrogen + cyclopentane mixed hydrate phase, both defined;2 {water +carbon dioxide + nitrogen}, the equilibrium pressure of the mixed hydrate is reduced by 0.95 up

Paris-Sud XI, Université de

437

SEPARATION OF TERNARY HETEROAZEOTROPIC MIXTURES IN A CLOSED MULTIVESSEL BATCH DISTILLATION-DECANTER HYBRID  

E-Print Network [OSTI]

SEPARATION OF TERNARY HETEROAZEOTROPIC MIXTURES IN A CLOSED MULTIVESSEL BATCH DISTILLATION, Trondheim, Norway The feasibility of a novel multivessel batch distillation-decanter hybrid for simultaneous enables us to make direct use of the distillation line (or residue curve) map. Simple rules for predicting

Skogestad, Sigurd

438

Effect of organic-vapor mixtures on the service life of respirator cartridges. Part 1  

SciTech Connect (OSTI)

We challenged pairs of MSA respirator cartridges with two compounds, isopropyl alcohol (IPA) and methyl ethyl ketone (MEK), to study the adsorption characteristics of organic vapors on cartridge performance. Each vapor was injected at three concentrations: (1) each at 10 times the respective Threshold Limit Value (TLV), (2) as a mixture at a concentration equal to the sum of the two single concentrations of item (1), and (3) each alone at a concentration equal to the total-mixture challenge concentration of item (2). The experiments were repeated at 20% and 85% relative humidities. One-percent and ten-percent breakthrough times were observed experimentally in every case, and breakthrough times of the mixture agreed with the single, high-concentration challenge. Experimental data were matched to a theoretical model derived from modified Wheeler-Robell equations and showed close correlations between adsorption-rate constants for the mixture and for the individual compounds. Based on these first experiments, we feel that an accurate mathematical model is possible, and further experiments are planned to verify this. 12 refs., 1 fig., 3 tabs.

Swearengen, P.M.; Weaver, S.C.

1985-01-01T23:59:59.000Z

439

Joint Uncertainty Decoding with Unscented Transform for Noise-robust Subspace Gaussian Mixture Models  

E-Print Network [OSTI]

T S C R T S C #12;Noise compensation Larger modelling power higher recognition accuracy. Our systemsJoint Uncertainty Decoding with Unscented Transform for Noise-robust Subspace Gaussian Mixture [Povey et al., 2011] In mismatched condition (i.e. noise), the gain disappears Goal Noise compensation

Edinburgh, University of

440

Adsorption of VOCs from the Gas Phase to Different Minerals and a Mineral Mixture  

Science Journals Connector (OSTI)

Adsorption of VOCs from the Gas Phase to Different Minerals and a Mineral Mixture ... Here adsorption to three well-defined minerals (hematite, corundum, and lime) was studied by a chromatographic method. ... (39)?Suzuki, S.; Green, P. G.; Bumgarner, R. E.; Dasgupta, S.; Goddard, W. A.; Blake, G. A. Science 1992, 257, 942?945. ...

Kai-Uwe Goss; Steven J. Eisenreich

1996-06-26T23:59:59.000Z

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


441

Analytical-Numerical Methodology to Measure Undamaged, Fracture and Healing Properties of Asphalt Mixtures  

E-Print Network [OSTI]

........................................................ 4? Figure 2.Change in stiffness profile with pavement age .................................................. 20? Figure 3.The OT setup ..................................................................................................... 24? Figure..., the characterization of viscoelastic properties of field-aged asphalt mixtures is more challenging for pavement engineers because there are numerous issues that make it very difficult to tackle. Among these issues are the various loading scenarios, the different...

Koohi, Yasser 1980-

2012-08-29T23:59:59.000Z

442

Energy production rates in fluid mixtures of inelastic rough hard spheres  

E-Print Network [OSTI]

The aim of this work is to explore the combined effect of polydispersity and roughness on the partial energy production rates and on the total cooling rate of a granular fluid mixture. We consider a mixture of inelastic rough hard spheres of different number densities, masses, diameters, moments of inertia, and mutual coefficients of normal and tangential restitution. Starting from the first equation of the BBGKY hierarchy, the collisional energy production rates associated with the translational and rotational temperatures ($T_i^\\text{tr}$ and $T_i^\\text{rot}$) are expressed in terms of two-body average values. Next, those average values are estimated by assuming a velocity distribution function based on maximum-entropy arguments, allowing us to express the energy production rates and the total cooling rate in terms of the partial temperatures and the parameters of the mixture. Finally, the results are applied to the homogeneous cooling state of a binary mixture and the influence of inelasticity and roughness on the temperature ratios $T_1^\\text{tr}/T_1^\\text{rot}$, $T_2^\\text{tr}/T_1^\\text{tr}$, and $T_2^\\text{rot}/T_1^\\text{rot}$ is analyzed.

Andrs Santos; Gilberto M. Kremer; Vicente Garz

2010-07-16T23:59:59.000Z

443

Self-Assembly in Mixtures of Polymers and Small Associating Molecules Haim Diamant and David Andelman*  

E-Print Network [OSTI]

Self-Assembly in Mixtures of Polymers and Small Associating Molecules Haim Diamant and David of the interaction, compete with intrachain repulsion and eventually drive a joint self-assembly of the two species with experiments on the onset of self-assembly in diverse polymer- surfactant systems. The threshold concentration

Andelman, David

444

Size Ratio Effects on Interparticle Interactions and Phase Behavior of Microsphere-Nanoparticle Mixtures  

E-Print Network [OSTI]

Size Ratio Effects on Interparticle Interactions and Phase Behavior of Microsphere-Nanoparticle and phase behavior of microsphere-nanoparticle mixtures of high charge asymmetry and varying size ratio. In the absence of nanoparticles, negligibly charged microspheres flocculate as a result of van der Waals

Lewis, Jennifer

445

Studies of Plasma Dynamics in a Small Plasma Focus Operating in Hydrogen-Argon Mixtures  

Science Journals Connector (OSTI)

We report on experimental observations in PFP-I, a small 3.8 kJ plasma focus, which is operated in Hydrogen-Argon mixtures...2-Ar mixing ratio. Hot spot sizes around 150 ?m in the soft X-ray region, have been inf...

M. Favre; P. Silva; H. Chuaqui; E. Wyndham; P. Choi

1997-01-01T23:59:59.000Z

446

Dechlorination of PCE by mixtures of green rust and zero-valent iron  

E-Print Network [OSTI]

such as pH (8, 9, and 10), ZVI pretreatment, and preparation method of the mixtures (GR[S]?? synthesized in the presence of ZVI; GR[S]?? and ZVI mixed after preparation). For all the experimental conditions evaluated, the activities of these reductants...

Marchal, Fabienne

2002-01-01T23:59:59.000Z

447

Ionic liquid binary mixtures: Promising reaction media for carbohydrate conversion into 5-hydroxymethylfurfural  

Science Journals Connector (OSTI)

Abstract The conversion of carbohydrates into 5-hydroxymethylfurfural (5-HMF) has been studied in binary mixtures of ionic liquids (ILs), using strongly acidic resin Amberlyst 15 as the catalyst. In particular, both mono- and disaccharides, such as fructose, glucose and sucrose have been investigated. Considering the favorable effect exerted by chloride-based ionic liquids in the dissolution of carbohydrates, we used binary mixtures of 1-butyl-3-methylimidazolium chloride ([bmim][Cl]) with [bmim+] based ionic liquids differing in size, shape and coordination ability of the anion ([bmim][BF4], [bmim][N(CF3SO2)2], [bmim][N(CN)2], [bmim][SbF6] and [bmim][CF3SO3]). Carbohydrate conversion in [bmim][BF4]/[bmim][Cl] binary mixtures, has been studied under both magnetic stirring and ultrasound (US) activation. The catalytic system used led to the formation of 5-hydroxymethylfurfural in good yield under mild conditions. A significant influence of IL binary mixture composition on the outcome of the target processes was evidenced. Improvements in both reaction time and temperature have been observed, under US activation.

Francesca DAnna; Salvatore Marullo; Paola Vitale; Carla Rizzo; Paolo Lo Meo; Renato Noto

2014-01-01T23:59:59.000Z

448

Lattice Boltzmann Computation of Plasma Jet Behaviors : part II Argon-Nitrogen Mixture  

E-Print Network [OSTI]

the applications to simulating flows with temperature-dependent diffusion parameters (viscosity and diffusivity. Argon and Nitrogen are two gases of the most ones used in plasma spraying. The mixture is used when spraying. Our numerical results based on the centerline temperature and velocity profiles, its

Paris-Sud XI, Université de

449

Laser-induced spark ignition of H2/O2/Ar mixtures  

Science Journals Connector (OSTI)

Laser-induced spark ignition of hydrogen-oxygen-argon mixtures was experimentally investigated using a Q-swiched Nd:YAG laser to break down the gas at 532 nm. The laser-based high-speed schlieren system was emplo...

ChangJian Wang; ShengLi Xu; GuangMing Jia

2007-12-01T23:59:59.000Z

450

BUBBLE CHARACTERISTICS AND CONVECTIVE EFFECTS IN THE FLOW BOILING HEAT TRANSFER OF BINARY MIXTURES  

E-Print Network [OSTI]

BUBBLE CHARACTERISTICS AND CONVECTIVE EFFECTS IN THE FLOW BOILING HEAT TRANSFER OF BINARY MIXTURES on the bubble growth and associated heat transfer phenomena. The present work focuses on obtaining the bubble. The bubble growth is observed using a high speed camera (1000 fps) under a magnification of 290X. The bubble

Kandlikar, Satish

451

The Resolution of Mixtures of Carbon Dioxide and Nitrous Oxide by Gas Solid Chromatography  

Science Journals Connector (OSTI)

......1106. R. P. DeGrazio The Dow Chemical Company, Rocky Flats Division, Golden, Colorado The Resolution of Mixtures...Chromatography* by R. P. DeGrazio, The Dow Chemical Company, Rocky Flats Division, Golden, Colorado A simple and unique chromato......

R. P. DeGrazio

1965-06-01T23:59:59.000Z

452

EFFECT of GROUND COPPER SLAG on the STRENGTH, and TOUGHNESS of CEMENTITIOUS MIXTURES  

E-Print Network [OSTI]

1 EFFECT of GROUND COPPER SLAG on the STRENGTH, and TOUGHNESS of CEMENTITIOUS MIXTURES A.M. Ariño1 , and B. Mobasher2 Abstract The effect of ground copper slag (GCS) on the strength and fracture of cement-based materials is studied. Up to 15% by mass of ground copper slag was used as a portland cement replacement

Mobasher, Barzin

453

Density functional theory for sphere-needle mixtures: Toward finite rod thickness Ansgar Esztermann  

E-Print Network [OSTI]

Düsseldorf, Germany Matthias Schmidt* Soft Condensed Matter, Debye Institut, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands (Received 23 April 2004; published 4 August 2004) For mixtures is unaffected by this argument and is governed by ex- cluded volume.) Rosenfeld's theory when applied to a mix

Schmidt, Matthias

454

Experimental: Gel Electrolyte The gel mixtures were designed to be cast as  

E-Print Network [OSTI]

Experimental: Gel Electrolyte The gel mixtures were designed to be cast as low viscosity solution and Frederik Krebs Polymer Solar Cell Initiative, The Danish Polymer Centre, Risø National Laboratory, PO Box solar cell power extraction solving the problem of high current densities. LCs realized reach 1

455

Microscale Behavior in Amphiphilic Fluid Mixtures Predicted by the SAFT Equation  

Science Journals Connector (OSTI)

Microscale Behavior in Amphiphilic Fluid Mixtures Predicted by the SAFT Equation ... Molecular-Based Equations of State for Associating Fluids: A Review of SAFT and Related Approaches ... Molecular-Based Equations of State for Associating Fluids: A Review of SAFT and Related Approaches ...

Daniel R. Kuespert; Marc D. Donohue

1995-01-01T23:59:59.000Z

456

Mapping oil spills on sea water using spectral mixture analysis of hyperspectral image data  

E-Print Network [OSTI]

Mapping oil spills on sea water using spectral mixture analysis of hyperspectral image data Javier large spill oil events threatening coastal habitats and species. Some recent examples include the 2002 Prestige tanker oil spill in Galicia, Northern Spain, as well as repeated oil spill leaks evidenced

Plaza, Antonio J.

457

Mean-field analysis of the stability of a K-Rb Fermi-Bose mixture  

Science Journals Connector (OSTI)

We compare the experimental stability diagram of a Fermi-Bose mixture of 40K and 87Rb atoms with attractive interaction to the predictions of a mean-field theoretical model. We discuss how this comparison can be used to give a better estimate of the interspecies scattering length, which is currently known from collisional measurements with larger uncertainty.

M. Modugno; F. Ferlaino; F. Riboli; G. Roati; G. Modugno; M. Inguscio

2003-10-29T23:59:59.000Z

458

hal-00187600,version1-14Nov2007 Models for dependent extremes using stable mixtures  

E-Print Network [OSTI]

hal-00187600,version1-14Nov2007 Models for dependent extremes using stable mixtures Running/short title: Models for dependent extremes Anne-Laure Foug`eres ´Equipe Modal'X, Universit´e Paris X-stable, multivariate extreme value distribu- tion, pitting corrosion, random effect, positive stable variables

Paris-Sud XI, Université de

459

Binary nucleation rates for ethanol/water mixtures in supersonic Laval nozzles: Analyses by the first and second nucleation theorems  

SciTech Connect (OSTI)

We performed pressure trace measurements and small angle x-ray scattering measurements to determine the vapor-liquid nucleation rates of EtOH/H{sub 2}O mixtures including pure EtOH and pure H{sub 2}O in two supersonic Laval nozzles with different expansion rates. The nucleation rates varied from 0.9 10{sup 17} to 16 10{sup 17} cm{sup ?3} s{sup ?1} over the temperature range of 210 K to 230 K, EtOH activity range of 0 to 11.6, and H{sub 2}O activity range of 0 to 124. The first and second nucleation theorems were applied to the nucleation rates to estimate the sizes, compositions, and excess energies of the critical clusters. The critical clusters contained from 4 to 15 molecules for pure H{sub 2}O and EtOH/H{sub 2}O clusters, and from 16 to 23 molecules for pure EtOH clusters. Comparing the excess energies of the pure H{sub 2}O critical clusters with the results of a quantum-chemistry calculation suggested that the pre-factor of the theoretical nucleation rate is almost constant regardless of the monomer concentration. One possible explanation for this result is that cooling of the critical clusters limits the nucleation rate under the highly supersaturated conditions. The results of the analyses also yielded the relation between the surface energy and the composition of the critical clusters, where the latter are predicted to consist only of surface molecules. Applying this relationship to the EtOH/H{sub 2}O bulk liquid mixtures, we estimated the EtOH mole fraction in the surface layer and found it is higher than that derived from the surface tension based on the Gibbs adsorption equation when the EtOH mole fraction in the liquid is higher than about 0.2 mol/mol. This discrepancy was attributed to the existence of the EtOH depletion layer just below the surface layer of the liquid.

Tanimura, Shinobu; Pathak, Harshad [William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 140 West 19th Av., Columbus, Ohio 43210 (United States)] [William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 140 West 19th Av., Columbus, Ohio 43210 (United States); Wyslouzil, Barbara E. [William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 140 West 19th Av., Columbus, Ohio 43210 (United States) [William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 140 West 19th Av., Columbus, Ohio 43210 (United States); Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210 (United States)

2013-11-07T23:59:59.000Z

460

Self-consistent solution for proximity effect and Josephson current in ballistic graphene SNS Josephson junctions  

SciTech Connect (OSTI)

We use a tight-binding Bogoliubov-de Gennes (BdG) formalism to self-consistently calculate the proximity effect, Josephson current, and local density of states in ballistic graphene SNS Josephson junctions. Both short and long junctions, with respect to the superconducting coherence length, are considered, as well as different doping levels of the graphene. We show that self-consistency does not notably change the current-phase relationship derived earlier for short junctions using the non-selfconsistent Dirac-BdG formalism but predict a significantly increased critical current with a stronger junction length dependence. In addition, we show that in junctions with no Fermi level mismatch between the N and S regions superconductivity persists even in the longest junctions we can investigate, indicating a diverging Ginzburg-Landau superconducting coherence length in the normal region.

Black-Schaffer, Annica M.

2010-04-06T23:59:59.000Z

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


461

Self-consistent field theory based molecular dynamics with linear system-size scaling  

SciTech Connect (OSTI)

We present an improved field-theoretic approach to the grand-canonical potential suitable for linear scaling molecular dynamics simulations using forces from self-consistent electronic structure calculations. It is based on an exact decomposition of the grand canonical potential for independent fermions and does neither rely on the ability to localize the orbitals nor that the Hamilton operator is well-conditioned. Hence, this scheme enables highly accurate all-electron linear scaling calculations even for metallic systems. The inherent energy drift of Born-Oppenheimer molecular dynamics simulations, arising from an incomplete convergence of the self-consistent field cycle, is circumvented by means of a properly modified Langevin equation. The predictive power of the present approach is illustrated using the example of liquid methane under extreme conditions.

Richters, Dorothee [Institute of Mathematics and Center for Computational Sciences, Johannes Gutenberg University Mainz, Staudinger Weg 9, D-55128 Mainz (Germany)] [Institute of Mathematics and Center for Computational Sciences, Johannes Gutenberg University Mainz, Staudinger Weg 9, D-55128 Mainz (Germany); Khne, Thomas D., E-mail: kuehne@uni-mainz.de [Institute of Physical Chemistry and Center for Computational Sciences, Johannes Gutenberg University Mainz, Staudinger Weg 7, D-55128 Mainz (Germany); Technical and Macromolecular Chemistry, University of Paderborn, Warburger Str. 100, D-33098 Paderborn (Germany)

2014-04-07T23:59:59.000Z

462

Assessing the consistency between short-term global temperature trends in observations and climate model projections  

E-Print Network [OSTI]

Assessing the consistency between short-term global temperature trends in observations and climate model projections is a challenging problem. While climate models capture many processes governing short-term climate fluctuations, they are not expected to simulate the specific timing of these somewhat random phenomena - the occurrence of which may impact the realized trend. Therefore, to assess model performance, we develop distributions of projected temperature trends from a collection of climate models running the IPCC A1B emissions scenario. We evaluate where observed trends of length 5 to 15 years fall within the distribution of model trends of the same length. We find that current trends lie near the lower limits of the model distributions, with cumulative probability-of-occurrence values typically between 5 percent and 20 percent, and probabilities below 5 percent not uncommon. Our results indicate cause for concern regarding the consistency between climate model projections and observed climate behavior...

Michaels, Patrick J; Christy, John R; Herman, Chad S; Liljegren, Lucia M; Annan, James D

2013-01-01T23:59:59.000Z

463

Transport enhancement and suppression in turbulent magnetic reconnection: A self-consistent turbulence model  

SciTech Connect (OSTI)

Through the enhancement of transport, turbulence is expected to contribute to the fast reconnection. However, the effects of turbulence are not so straightforward. In addition to the enhancement of transport, turbulence under some environment shows effects that suppress the transport. In the presence of turbulent cross helicity, such dynamic balance between the transport enhancement and suppression occurs. As this result of dynamic balance, the region of effective enhanced magnetic diffusivity is confined to a narrow region, leading to the fast reconnection. In order to confirm this idea, a self-consistent turbulence model for the magnetic reconnection is proposed. With the aid of numerical simulations where turbulence effects are incorporated in a consistent manner through the turbulence model, the dynamic balance in the turbulence magnetic reconnection is confirmed.

Yokoi, N. [Institute of Industrial Science, University of Tokyo, Tokyo (Japan)] [Institute of Industrial Science, University of Tokyo, Tokyo (Japan); Higashimori, K.; Hoshino, M. [Department of Earth and Planetary Science, University of Tokyo, Tokyo (Japan)] [Department of Earth and Planetary Science, University of Tokyo, Tokyo (Japan)

2013-12-15T23:59:59.000Z

464

Self-consistent theory of hadron-nucleus scattering. Application to pion physics  

SciTech Connect (OSTI)

The requirement of using self-consistent amplitudes to evaluate microscopically the scattering of strongly interacting particles from nuclei is developed. Application of the idea to a simple model of pion-nucleus scattering is made. Numerical results indicate that the expansion of the optical potential converges when evaluated in terms of fully self-consistent quantities. A comparison of the results to a recent determination of the spreading interaction in the phenomenological isobar-hole model shows that the theory accounts for the sign and magnitude of the real and imaginary part of the spreading interaction with no adjusted parameters. The self-consistnt theory has a strong density dependence, and the consequences of this for pion-nucleus scattering are discussed. 18 figures, 1 table.

Johnson, M.B.

1980-01-01T23:59:59.000Z

465

Self-consistent Greens-function technique for surfaces and interfaces  

Science Journals Connector (OSTI)

We have implemented an efficient self-consistent Greens-function technique for calculating ground-state properties of surfaces and interfaces, based on the linear-muffin-tin-orbitals method within the tight-binding representation. In this approach the interlayer interaction is extremely short ranged, and only a few layers close to the interface need be treated self-consistently via a Dyson equation. For semi-infinite jellium, the technique gives work functions and surface energies that are in excellent agreement with earlier calculations. For the bcc(110) surface of the alkali metals, we find surface energies in close agreement with values derived from surface tensions of the liquid metals, and work functions that deviate less than 10% from the experimental values.

H. L. Skriver and N. M. Rosengaard

1991-04-15T23:59:59.000Z

466

Artificial Neural Network Meta Models To Enhance the Prediction and Consistency of Multiphase Reactor Correlations  

Science Journals Connector (OSTI)

Artificial Neural Network Meta Models To Enhance the Prediction and Consistency of Multiphase Reactor Correlations ... Artificial neural networks (ANNs), as correlation tools, have gained wide acceptance in the field because of their inherent ability to map nonlinear relationships that tie up independent variables (either as dimensional inputs, e.g., pressure, diameter, etc., or as dimensionless inputs, e.g., Reynolds, Weber, and Froude numbers, etc.) to the reactor characteristics to be predicted, i.e., dimensional or dimensionless output. ...

Laurentiu A. Tarca; Bernard P. A. Grandjean; Faal Larachi

2003-03-19T23:59:59.000Z

467

New wind input term consistent with experimental, theoretical and numerical considerations  

E-Print Network [OSTI]

We offer a new method for determining the wind source term for energy and momentum fluxes transfer from the atmosphere to the wind-driven sea. This new source-term formulation is based on extensive analysis of experimental data collected at different sites around the world. It is shown that this new wind source term to be consistent both with numerical solution of exact equation for resonant four-wave interactions and available experimental data.

V. E. Zakharov; D. Resio; A. Pushkarev

2012-12-05T23:59:59.000Z

468

Self-consistent treatment for strong localization of light in disordered dielectric superlattices  

Science Journals Connector (OSTI)

Using a self-consistent theory of localization, we investigate the criteria for the localization of electromagnetic waves propagating through a dielectric superlattice with weak disorder. It is shown by calculation that near the band edge the strong localization of photons indeed occurs, irrespective of the strength of the disorder. Diffusion in this system is found by considering the influence of Bragg reflection on the bare diffusion coefficient.

Jiang Qi and Tao Rui-bao

1991-03-01T23:59:59.000Z

469

Enhancing the Benefit of the Chemical Mixture Methodology: A Report on Methodology Testing and Potential Approaches for Improving Performance  

SciTech Connect (OSTI)

Extensive testing shows that the current version of the Chemical Mixture Methodology (CMM) is meeting its intended mission to provide conservative estimates of the health effects from exposure to airborne chemical mixtures. However, the current version of the CMM could benefit from several enhancements that are designed to improve its application of Health Code Numbers (HCNs) and employ weighting factors to reduce over conservatism.

Yu, Xiao-Ying; Yao, Juan; He, Hua; Glantz, Clifford S.; Booth, Alexander E.

2012-01-01T23:59:59.000Z

470

Binary and ternary gas mixtures with temperature enhanced diffuse glow discharge characteristics for use in closing switches  

DOE Patents [OSTI]

An improvement to the gas mixture used in diffuse glow discharge closing switches is disclosed which includes binary and ternary gas mixtures which are formulated to exhibit decreasing electron attachment with increasing temperature. This increases the efficiency of the conductance of the glow discharge and further inhibits the formation of an arc. 11 figs.

Christophorou, L.G.; Hunter, S.R.

1988-06-28T23:59:59.000Z

471

Shear viscosity measurements in the binary mixture butyl cellosolve-water near its upper and lower critical consolute points  

E-Print Network [OSTI]

has been measured for a two-component critical liquid system, butyl cellosolve-water, in the region to report measurements of the shear viscosity of critical binary mixture butyl cello- solve (2-n353 Shear viscosity measurements in the binary mixture butyl cellosolve-water near its upper

Boyer, Edmond

472

Flammability Limits of Binary Mixtures of 1,2-Ethanediol + Steam and 1,2-Propanediol + Steam  

Science Journals Connector (OSTI)

Flammability Limits of Binary Mixtures of 1,2-Ethanediol + Steam and 1,2-Propanediol + Steam ... In addition, the experimental results were compared with the estimated values based on the adiabatic flame temperature method. ... Shortly before ignition, the stirrer was turned off, and the mixture was left for 1 min to eliminate turbulence. ...

Ke Zhang; Xianyang Meng; Jiangtao Wu

2013-08-13T23:59:59.000Z

473

Droplet Dynamics Changes in Electrostatic Sprays of Methanol-Water Mixtures Zohra Olumee, John H. Callahan, and Akos Vertes*,  

E-Print Network [OSTI]

conductivity, dielectric constant, surface tension, viscosity, and density) and on the spraying conditionsDroplet Dynamics Changes in Electrostatic Sprays of Methanol-Water Mixtures Zohra Olumee, John H generated from methanol-water mixtures. We investigated spraying conditions close to those of electrospray

Vertes, Akos

474

Binary and ternary gas mixtures with temperature enhanced diffuse glow discharge characteristics for use in closing switches  

DOE Patents [OSTI]

An improvement to the gas mixture used in diffuse glow discharge closing switches is disclosed which includes binary and ternary gas mixtures which are formulated to exhibit decreasing electron attachment with increasing temperature. This increases the efficiency of the conductance of the glow discharge and further inhibits the formation of an arc. 11 figs.

Christophorou, L.G.; Hunter, S.R.

1990-06-26T23:59:59.000Z

475

A comparative study of CH4 and CF4 rf discharges using a consistent plasma physics and chemistry simulator  

Science Journals Connector (OSTI)

A self-consistent, one-dimensional simulator for the physics and chemistry of radio frequency (rf) plasmas was developed and applied for CH4 and CF4. The simulator consists of a fluid model for the discharge phys...

Nikolaos V. Mantzaris; Evangelos Gogolides

1996-09-01T23:59:59.000Z

476

Linear and nonlinear dynamics of a dust bicrystal consisting of positive and negative dust particles  

SciTech Connect (OSTI)

A dusty plasma crystalline configuration consisting of charged dust grains of alternating charge sign ({center_dot}{center_dot}{center_dot}/+/-/+/-/+/{center_dot}{center_dot}{center_dot}) and mass is considered. Both charge and mass of each dust species are taken to be constant. Considering the equations of longitudinal motion, a dispersion relation for linear longitudinal vibrations is derived from first principles and then analyzed. Two harmonic modes are obtained, namely, an acoustic mode and an inverse-dispersive optic-like one. The nonlinear aspects of acoustic longitudinal dust grain motion are addressed via a generalized Boussinesq (and, alternatively, a generalized Korteweg-de Vries) description.

Kourakis, I.; Shukla, P.K.; Morfill, G.E. [Institut fuer Theoretische Physik IV and Centre for Plasma Science and Astrophysics, Fakultaet fuer Physik und Astronomie, Ruhr-Universitaet Bochum, D-44780 Bochum (Germany); Max-Planck Institut fuer Extraterrestrische Physik, Giessenbachstrasse, D-85740 Garching (Germany)

2005-11-15T23:59:59.000Z

477

Special Relativity and possible Lorentz violations consistently coexist in Aristotle space-time  

E-Print Network [OSTI]

Some studies interpret quantum measurement as being explicitly non local. Others assume the preferred frame hypothesis. Unfortunately, these two classes of studies conflict with Minkowski space-time geometry. On the contrary, in Aristotle space-time, Lorentz invariance, interpreted as a physical property applying to all phenomena actually satisfying this symmetry (as opposed to a geometrical constraint applying to an assumed pre-existing Minkowski space-time) consistently coexists with possible Lorentz violations. Moreover, as will be pointed out, the geometrical framework provided by Aristotle space-time is in fact necessary to derive the Lorentz transformations from physical hypotheses.

B. Chaverondier

2008-05-15T23:59:59.000Z

478

Chemically Consistent Evolution of Galaxies on Cosmological Timescales and the DLA Galaxy Population  

E-Print Network [OSTI]

We describe the evolution of galaxies in a chemically consistent way accounting for the increasing initial metallicity of successive generations of stars. The enrichment of various types of model galaxies is compared with Damped Ly$\\alpha$ (= DLA) abundances over the redshift range from ${\\rm z \\sim 0}$ through ${\\rm z > 4.4}$. We discuss properties and composition of the galaxy population giving rise to DLA absorption. Beyond evolution of individual galaxies a change is found in the composition of DLA galaxy samples from high to low redshift. Spectrophotometric properties are predicted for optical identifications of DLA galaxies.

U. Fritze-v. Alvensleben; U. Lindner; C. S. Mller

1999-07-28T23:59:59.000Z

479

Self-consistent Green's function calculation of 16O at small missing energies  

E-Print Network [OSTI]

Calculations of the one-hole spectral function of 16O for small missing energies are reviewed. The self-consistent Green's function approach is employed together with the Faddeev equations technique in order to study the coupling of both particle-particle and particle-hole phonons to the single-particle motion. The results indicate that the characteristics of hole fragmentation are related to the low-lying states of 16O and an improvement of the description of this spectrum, beyond the random phase approximation, is required to understand the experimental strength distribution. A first calculation in this direction that accounts for two-phonon states is discussed.

C. Barbieri; W. H. Dickhoff

2004-10-19T23:59:59.000Z

480

A fast inverse consistent deformable image registration method based on symmetric optical flow computation  

Science Journals Connector (OSTI)

Deformable image registration is widely used in various radiation therapy applications including daily treatment planning adaptation to map planned tissue or dose to changing anatomy. In this work, a simple and efficient inverse consistency deformable registration method is proposed with aims of higher registration accuracy and faster convergence speed. Instead of registering image I to a second image J, the two images are symmetrically deformed toward one another in multiple passes, until both deformed images are matched and correct registration is therefore achieved. In each pass, a delta motion field is computed by minimizing a symmetric optical flow system cost function using modified optical flow algorithms. The images are then further deformed with the delta motion field in the positive and negative directions respectively, and then used for the next pass. The magnitude of the delta motion field is forced to be less than 0.4 voxel for every pass in order to guarantee smoothness and invertibility for the two overall motion fields that are accumulating the delta motion fields in both positive and negative directions, respectively. The final motion fields to register the original images I and J, in either direction, are calculated by inverting one overall motion field and combining the inversion result with the other overall motion field. The final motion fields are inversely consistent and this is ensured by the symmetric way that registration is carried out. The proposed method is demonstrated with phantom images, artificially deformed patient images and 4D-CT images. Our results suggest that the proposed method is able to improve the overall accuracy (reducing registration error by 30% or more, compared to the original and inversely inconsistent optical flow algorithms), reduce the inverse consistency error (by 95% or more) and increase the convergence rate (by 100% or more). The overall computation speed may slightly decrease, or increase in most cases because the new method converges faster. Compared to previously reported inverse consistency algorithms, the proposed method is simpler, easier to implement and more efficient.

Deshan Yang; Hua Li; Daniel A Low; Joseph O Deasy; Issam El Naqa

2008-01-01T23:59:59.000Z

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


481

Testing the Self-Consistency of MOND With Three-Dimensional Galaxy Kinematics  

E-Print Network [OSTI]

We propose a technique to test the idea that non-standard dynamics, rather than dark matter halos, might be responsible for the observed rotation curves of spiral galaxies. In the absence of non-luminous matter, a galactic disk's rotational velocity and its vertical velocity dispersion can be used jointly to test the self-consistency of the galaxy's dynamics. A specific illustrative example, using recent measurements of the disk kinematics of M33, shows this to be a promising approach to assess the viability of Modified Newtonian Dynamics (MOND).

Christopher W. Stubbs; Arti Garg

2005-12-02T23:59:59.000Z

482

Pressure tensor in the presence of velocity shear: stationary solutions and self-consistent equilibria  

E-Print Network [OSTI]

Observations and numerical simulations of laboratory and space plasmas in almost collisionless regimes reveal anisotropic and non-gyrotropic particle distribution functions. We investigate how such states can persist in the presence of a sheared flow. We focus our attention on the pressure tensor equation in a magnetized plasma and derive analytical self-consistent plasma equilibria which exhibit a novel asymmetry with respect to the magnetic field direction. These results are relevant for investigating, within fluid models that retain the full pressure tensor dynamics, plasma configurations where a background shear flow is present.

Cerri, S S; Califano, F; Del Sarto, D; Jenko, F

2014-01-01T23:59:59.000Z

483

Large two-dimensional electronic systems: Self-consistent energies and densities at low cost  

Science Journals Connector (OSTI)

We derive a self-consistent local variant of the Thomas-Fermi approximation for (quasi-) two-dimensional (2D) systems by localizing the Hartree term. The scheme results in an explicit orbital-free representation of the electron density and energy in terms of the external potential, the number of electrons, and the chemical potential determined upon normalization. We test the method over a variety 2D nanostructures by comparing to the Kohn-Sham 2D local-density approximation (LDA) calculations up to 600 electrons. Accurate results are obtained in view of the negligible computational cost. We also assess a local upper bound for the Hartree energy.

E. Rsnen; S. Pittalis; G. Bekio?lu; I. Makkonen

2013-01-31T23:59:59.000Z

484

Self-consistent study of the alpha particle driven TAE mode  

SciTech Connect (OSTI)

The interaction of high energy particles with an Alfven eigenmode is investigated self-consistently by using a realistic kinetic dispersion relation. All important poloidal mode numbers and their radial mode profiles as calculated with the NOVA-K code are included. A Hamiltonian guiding center code is used to simulate the alpha particle motion. The numerical simulations include particle orbit width, nonlinear particle dynamics and the effects of the modes on the particles. Modification of the particle distribution leading to mode saturation is observed. Particle loss is limited to devices in which the alpha particle gyro radius is a significant fraction of the minor radius.

Wu, Y.; White, R.B.

1994-04-01T23:59:59.000Z

485

Stability diagrams for fourfold coordination of polyvalent metal ions in molten mixtures of halide salts  

SciTech Connect (OSTI)

The stability of local fourfold coordination for divalent and trivalent metal ions in liquid mixtures of polyvalent metal halides and alkali halides is classified by means of structural coordinates obtained from properties of the elements. In parallel with earlier classifications of compound crystal structures and molecular shapes, the elemental properties are taken from first-principles calculations of valence electron orbitals in atoms, in the form of (i) the nodal radii of Andreoni, Baldereschi and Guizzetti or (ii) the pseudopotential radii or Zunger and Cohen. As a third alternative a classification based on Pettifor's phenomenological chemical scale of the elements is also considered. The alternative structural classification schemes that are developed from these elemental properties are generally successfully in distinguishing molten mixtures in which the available experimental evidence indicates long-lived fourfold coordination of polyvalent metal ions. In addition, Pettifor's chemical scale scheme is useful in sorting out finer details of local coordination in the liquid state. 3 figs., 71 refs.

Akdeniz, Z. (International Centre for Theoretical Physics, Trieste (Italy) Istanbul Univ. (Turkey). Dept. of Physics); Tosi, M.P. (Trieste Univ. (Italy). Dipt. di Fisica Teorica Argonne National Lab., IL (USA))

1988-11-01T23:59:59.000Z

486

Prediction of Transport Properties by Molecular Simulation: Methanol and Ethanol and their mixture  

E-Print Network [OSTI]

Transport properties of liquid methanol and ethanol are predicted by molecular dynamics simulation. The molecular models for the alcohols are rigid, non-polarizable and of united-atom type. They were developed in preceding work using experimental vapor-liquid equilibrium data only. Self- and Maxwell-Stefan diffusion coefficients as well as the shear viscosity of methanol, ethanol and their binary mixture are determined using equilibrium molecular dynamics and the Green-Kubo formalism. Non-equilibrium molecular dynamics is used for predicting the thermal conductivity of the two pure substances. The transport properties of the fluids are calculated over a wide temperature range at ambient pressure and compared with experimental and simulation data from the literature. Overall, a very good agreement with the experiment is found. For instance, the self-diffusion coefficient and the shear viscosity are predicted with average deviations of less 8% for the pure alcohols and 12% for the mixture. The predicted thermal...

Guevara-Carrion, Gabriela; Vrabec, Jadran; Hasse, Hans

2009-01-01T23:59:59.000Z

487

Electrochemical separation and concentration of sulfur containing gases from gas mixtures  

DOE Patents [OSTI]

A method of removing sulfur oxides of H.sub.2 S from high temperature gas mixtures (150.degree.-1000.degree. C.) is the subject of the present invention. An electrochemical cell is employed. The cell is provided with inert electrodes and an electrolyte which will provide anions compatible with the sulfur containing anions formed at the anode. The electrolyte is also selected to provide inert stable cations at the temperatures encountered. The gas mixture is passed by the cathode where the sulfur gases are converted to SO.sub.4.sup.= or, in the case of H.sub.2 S, to S.sup.=. The anions migrate to the anode where they are converted to a stable gaseous form at much greater concentration levels (>10X). Current flow may be effected by utilizing an external source of electrical energy or by passing a reducing gas such as hydrogen past the anode.

Winnick, Jack (3805 Woodrail-on-the-Green, Columbia, MO 65201)

1981-01-01T23:59:59.000Z

488

Catalytic igniters and their use to ignite lean hydrogen-air mixtures  

DOE Patents [OSTI]

A catalytic igniter which can ignite a hydrogen-air mixture as lean as 5.5% hydrogen with induction times ranging from 20 s to 400 s, under conditions which may be present during a loss-of-liquid-coolant accident at a light water nuclear reactor comprises (a) a perforate catalytically active substrate, such as a platinum coated ceramic honeycomb or wire mesh screen, through which heated gases produced by oxidation of the mixture can freely flow and (b) a plurality of thin platinum wires mounted in a thermally conductive manner on the substrate and positioned thereon so as to be able to receive heat from the substrate and the heated gases while also in contact with unoxidized gases.

McLean, William J. (Oakland, CA); Thorne, Lawrence R. (Livermore, CA); Volponi, Joanne V. (Livermore, CA)

1988-01-01T23:59:59.000Z

489

Behavior of complex mixtures in aquatic environments: a synthesis of PNL ecological research  

SciTech Connect (OSTI)

The term complex mixture has been recently applied to energy-related process streams, products and wastes that typically contain hundreds or thousands of individual organic compounds, like petroleum or synthetic fuel oils; but it is more generally applicable. A six-year program of ecological research has focused on four areas important to understanding the environmental behavior of complex mixtures: physicochemical variables, individual organism responses, ecosystems-level determinations, and metabolism. Of these areas, physicochemical variables and organism responses were intensively studied; system-level determinations and metabolism represent more recent directions. Chemical characterization was integrated throughout all areas of the program, and state-of-the-art methods were applied. 155 references, 35 figures, 4 tables.

Fickeisen, D.H.; Vaughan, B.E. (eds.)

1984-06-01T23:59:59.000Z

490

The Influence of Chain Dynamics on the Far Infrared Spectrum of Liquid Methanol-Water Mixtures  

SciTech Connect (OSTI)

Far-infrared absorption spectroscopy has been used to study the low frequency ({center_dot} 100 cm{sup -1}) intermolecular modes of methanol in mixtures with water. With the aid of a first principles molecular dynamics simulation on an equivalent system, a detailed understanding about the origin of the low frequency IR modes has been established. The total dipole spectrum from the simulation suggests that the bands appearing in the experimental spectra at approximately 55 cm{sup -1} and 70 cm{sup -1} in methanol and methanol-rich mixtures arise from both fluctuations and torsional motions occurring within the methanol hydrogen-bonded chains. The influence of these modes on both the solvation dynamics and the relaxation mechanisms in the liquid are discussed within the context of recent experimental and theoretical results that have emerged from studies focusing on the short time dynamics in the methanol hydrogen bond network.

Woods, K.N.; /Stanford U., Phys. Dept.; Wiedemann, H.; /SLAC, SSRL; ,

2005-07-12T23:59:59.000Z

491

Accuracy of relativistic energy-consistent pseudopotentials for superheavy elements 111-118: Molecular calibration calculations  

SciTech Connect (OSTI)

Relativistic energy-consistent pseudopotentials modelling the Dirac-Coulomb-Breit Hamiltonian with a finite nucleus model for the superheavy elements with nuclear charges 111-118 were calibrated in atomic and molecular calculations against fully relativistic all-electron reference data. Various choices for the adjustment of the f-potentials were investigated and an improved parametrization is recommended. Using the resulting pseudopotentials relativistic all-electron reference data can be reproduced at the self-consistent field level with average absolute (relative) errors of 0.0030 A (0.15%) for bond lengths and 2.79 N m{sup -1} (1.26%) for force constants for 24 diatomic test molecules, i.e., neutral or singly charged monohydrides, monofluorides, and monochlorides with closed-shell electronic structure. At the second-order Moller-Plesset perturbation theory level the corresponding average deviations are 0.0033 A (0.15%) for bond lengths and 2.86 N m{sup -1} (1.40%) for force constants. Corresponding improved f-potentials were also derived for the pseudopotentials modelling in addition the leading contributions from quantum electrodynamics.

Hangele, Tim; Dolg, Michael [Institute for Theoretical Chemistry, University of Cologne, Greinstr. 4, 50939 Cologne (Germany)

2013-01-28T23:59:59.000Z

492

Excimer laser photochemistry of silane-ammonia mixtures at 193 nm  

SciTech Connect (OSTI)

The ArF excimer laser induced photochemistry of silane-ammonia mixtures has been studied with molecular beam sampling mass spectrometry. The observed products include disilane, trisilane, and all possible aminosilanes, SiH{sub x}(NH{sub 2}){sub 4-x}, x = 0-3. These products are formed under steady-state photolysis conditions and under single-laser-pulse conditions. A mechanism for the formation of these species is proposed and quantitatively evaluated.

Beach, D.B.; Jasinski, J.M. (Thomas J. Watson Research Center, Yorktown Heights, NY (USA))

1990-04-05T23:59:59.000Z

493

ccsd-00000255(version1):26Mar2003 Critical Casimir effect and wetting by helium mixtures  

E-Print Network [OSTI]

mixtures against a sapphire window. We have found that this angle is finite and does not tend to zero when in contact with a sapphire window [5]. In fact, de Gennes [6] had noticed that long range forces may prevent effect [8,7,9­11] in the 4 He-rich film between the sapphire and the 3 He-rich bulk phase (Fig. 1

Paris-Sud XI, Université de

494

Dielectric breakdown properties of hot SF{sub 6}/He mixtures predicted from basic data  

SciTech Connect (OSTI)

Sulfur hexafluoride (SF{sub 6}) gas has a quite high global warming potential and hence it is required that applying any substitute for SF{sub 6} gas. Much interest in the use of a mixture of helium and SF{sub 6} as arc quenching medium was investigated indicating a higher recovery performance of arc interruption than that of pure SF{sub 6}. It is known that the electrical breakdown in a circuit breaker after arc interruption occurs in a hot gas environment, with a complicated species composition because of the occurrence of dissociation and other reactions. The likelihood of breakdown relies on the electron interactions with all these species. The critical reduced electric field strength (the field at which breakdown can occur, relative to the number density) of hot SF{sub 6}/He mixtures related to the dielectric recovery phase of a high voltage circuit breaker is calculated in the temperature range from 300 K to 3500 K. The critically reduced electric field strength of these mixtures was obtained by balancing electron generation and loss mechanisms. These were evaluated using the electron energy distribution function derived from the Boltzmann transport equation under the two-term approximation. Good agreement was found between calculations for pure hot SF{sub 6} and pure hot He and experimental results and previous calculations. The addition of He to SF{sub 6} was found to decrease the critical reduced electric field strength in the whole temperature range due to a lack of electron impact attachment process for helium regardless its high ionization potential. This indicates that not the behaviour of dielectric strength but possibly the higher energy dissipation capability caused mainly by light mass and high specific heat as well as thermal conductivity of atomic helium contributes most to a higher dielectric recovery performance of arc interruption for SF{sub 6}/He mixtures.

Wang, Weizong [Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094 (China) [Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094 (China); State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an Shaanxi 710049 (China); Tu, Xin; Mei, Danhua [Department of Electrical Engineering and Electronics, The University of Liverpool, Brownlow Hill, Liverpool L69 3GJ (United Kingdom)] [Department of Electrical Engineering and Electronics, The University of Liverpool, Brownlow Hill, Liverpool L69 3GJ (United Kingdom); Rong, Mingzhe [State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an Shaanxi 710049 (China)] [State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an Shaanxi 710049 (China)

2013-11-15T23:59:59.000Z

495

A study to improve the engineering properties of limestone rock asphalt paving mixtures  

E-Print Network [OSTI]

asphalt is a naturally occuring calcareous material with its interstices filled with natural bitumen. Deposits of this material exist in various locations throughout the United States. The 1 imestone rock asphalt materials used for thi s study... streets, parking lots, etc . Since the aggregate contains natural bitumen, the amount of additional asp baltic binder required to produce a quality paving mixture is reduced. Consequently, the cost of building a road with this material is reduced...

Goodwin, Philip Wayne

1978-01-01T23:59:59.000Z

496

Identification and differentiation of individual beta emitters in waste mixtures by liquid scintillation spectrometry  

E-Print Network [OSTI]

carbon-14, tritium, and iodine-125 liquid scintillation wastes, provided that the activity and isotopes present can be documented. This legislation has generated a significant interest in developing a quick, cost efficient method of identificatior.... Differentiation of various components within a two isotope mixture, and the detection level of a small activity of one nuclide in a large activity of a second radioisotope was examined. A catalogue of spectra, including the isotopic ratio of each component...

Siskel, Robin Lynn

1988-01-01T23:59:59.000Z

497

Computer simulation of effective viscosity of fluid-proppant mixture used in hydraulic fracturing  

E-Print Network [OSTI]

The paper presents results of numerical experiments performed to evaluate the effective viscosity of a fluid-proppant mixture, used in hydraulic fracturing. The results, obtained by two complimenting methods (the particle dynamics and the smoothed particle hydrodynamics), coincide to the accuracy of standard deviation. They provide an analytical equation for the dependence of effective viscosity on the proppant concentration, needed for numerical simulation of the hydraulic fracture propagation.

Kuzkin, Vitaly A; Linkov, Aleksandr M

2013-01-01T23:59:59.000Z

498

Thermal characterisation of an innovative quaternary molten nitrate mixture for energy storage in CSP plants  

Science Journals Connector (OSTI)

Abstract Enhancements to energy storage systems developed for solar thermoelectric technologies can yield considerable increases in efficiency for this type of renewable energy. Important improvements include the design of innovative storage fluids, such as molten salts possessing low melting points and high thermal stabilities. This research examines the design of an innovative quaternary molten nitrate mixture, with the goal of improving the solar salt used currently as an energy storage fluid in CSP plants. This quaternary salt, which contains different weight percentages of NaNO3, KNO3, LiNO3 and Ca(NO3)2, exhibits better physical and chemical properties than the binary solar salt (60% NaNO3+40% KNO3) currently used. The melting points, heat capacities and thermal stability of the quaternary mixtures were studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). In addition to DSC and TGA tests, viscosity and electrical conductivity measurements were carried out for the quaternary mixtures at different temperatures. The new salt was designed by taking into consideration the risk of solid species formation at high temperatures when calcium nitrate is present (which requires that the wt% does not exceed 20%) and the costs of LiNO3. These boundaries set the maximum wt% of LiNO3 to values below 15%. Finally it was determined that the proposed quaternary mixture, when used as a heat transfer fluid (HTF) in parabolic trough solar power plants, is able to expand plants? operating range to temperatures between 132 and 580C.

A.G. Fernndez; S. Ushak; H. Galleguillos; F.J. Prez

2015-01-01T23:59:59.000Z

499

Modeling Poly(N-isopropylacrylamide) Hydrogels in Water/Alcohol Mixtures with PC-SAFT  

Science Journals Connector (OSTI)

Modeling Poly(N-isopropylacrylamide) Hydrogels in Water/Alcohol Mixtures with PC-SAFT ... The PC-SAFT equation of state is used for thermodynamic modeling of poly(N-isopropylacrylamide) PNIPAAm in water and alcohols (methanol, ethanol, 1-propanol, and 2-propanol). ... The statistical association fluid theory (SAFT) developed by Chapman et al.,(42) a generally accepted and powerful equation of state based on statistical thermodynamics, provides an excellent framework for a variety of extensions and modifications. ...

Markus C. Arndt; Gabriele Sadowski

2012-07-30T23:59:59.000Z

500

A Simplified SAFT Equation of State for Associating Compounds and Mixtures  

Science Journals Connector (OSTI)

A Simplified SAFT Equation of State for Associating Compounds and Mixtures ... New Experimental Density Data and Soft-SAFT Models of Alkylimidazolium ([CnC1im]+) Chloride (Cl), Methylsulfate ([MeSO4]?), and Dimethylphosphate ([Me2PO4]?) Based Ionic Liquids ... New Experimental Density Data and Soft-SAFT Models of Alkylimidazolium ([CnC1im]+) Chloride (Cl), Methylsulfate ([MeSO4]?), and Dimethylphosphate ([Me2PO4]?) Based Ionic Liquids ...

Yuan-Hao Fu; Stanley I. Sandler

1995-05-01T23:59:59.000Z