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Note: This page contains sample records for the topic "horsepower change front" 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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1

Alternative Fuels Data Center: Hybrid Electric Horsepower for Kentucky  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Hybrid Electric Hybrid Electric Horsepower for Kentucky Schools to someone by E-mail Share Alternative Fuels Data Center: Hybrid Electric Horsepower for Kentucky Schools on Facebook Tweet about Alternative Fuels Data Center: Hybrid Electric Horsepower for Kentucky Schools on Twitter Bookmark Alternative Fuels Data Center: Hybrid Electric Horsepower for Kentucky Schools on Google Bookmark Alternative Fuels Data Center: Hybrid Electric Horsepower for Kentucky Schools on Delicious Rank Alternative Fuels Data Center: Hybrid Electric Horsepower for Kentucky Schools on Digg Find More places to share Alternative Fuels Data Center: Hybrid Electric Horsepower for Kentucky Schools on AddThis.com... April 7, 2011 Hybrid Electric Horsepower for Kentucky Schools " The hybrid school bus project not only serves as a means to improve

2

Economic Realities and Energy Efficient Polyphase Integral Horsepower Electric Motors  

E-Print Network (OSTI)

Energy efficient polyphase integral horsepower electric motors are currently being vigorously promoted as a profitable method of conserving energy in many industrial and commercial applications. While the goal to be attained is indeed laudable, and must be tenaciously pursued, the economic realities of investment payback on increased efficiency versus cost of change out, power factor, etc. must have a meaningful review before decision making. Actual savings on a discount cash flow basis must be documented. and validity of the claims for the energy efficient motor must be verified. This paper develops the procedures used by the chemical manufacturing divisions of the Union Carbide Corporation in developing a long range plan for evolution from a motor population of standard efficiency units to one of higher efficiency and increased reliability. It notes statistics publicized by the U.S. Department of Energy, Union Carbide's overall electric equipment efficiency review, their own efficiency testing of sample small electric motors, and a pilot program to determine the number of lightly loaded motors in plant location. It further depicts an economic appraisal on the payback of replacing a standard efficiency motor with a higher efficiency unit and an action plan for purchasing energy efficient motors while simultaneously securing optimization of other parameters.

Whittington, B. W.

1980-01-01T23:59:59.000Z

3

Calculating Horsepower Requirements and Sizing Supply Pipelines for Irrigation  

E-Print Network (OSTI)

Pumping costs are often one of the largest single expenses in irrigated agriculture. This publication explains how to lower pumping costs by calculating horsepower requirements and sizing supply pipelines correctly. Examples take the reader through a step-by-step process. A special section deals with selecting PVC pipe.

Fipps, Guy

1995-09-05T23:59:59.000Z

4

Cold Fronts Research: The Australian Summertime “Cool Change”  

Science Conference Proceedings (OSTI)

Much of the significant weather of southeastern Australia is associated with the passage of cold fronts. In summer, such passages are often accompanied by rapid and extreme temperature fails, as hot continental northerly winds are replaced with ...

R. K. Smith; B. F. Ryan; A. J. Troup; K. J. Wilson

1982-09-01T23:59:59.000Z

5

Study on reduction of accessory-horsepower requirements. Third quarterly progress report  

DOE Green Energy (OSTI)

The objective of this study program is to minimize automotive accessory horsepower consumption, and thereby maximize overall vehicle fuel economy, by utilizing continuously variable speed drives or auxiliary power units (APUs) in a standard passenger automobile. As an aid to definitizing accessory performance, load requirements and fuel economy, a baseline vehicle has beeen established. This vehicle is a conventional intermediate size 5- or 6-passenger automobile with a 4.1 to 5.7 liter (250 to 350 cubic inch) displacement, spark ignition engine. Accessories to be considered are the alternator, power steering system, power brakes, air conditioner, cooling fan, water pump and emission control air pump. A program summary of major accomplishments is presented including: accessory drive devices analyses; vehicle computer model fuel economy analyses; improved accessory efficiency analysis; resized engine fuel economy analysis; accessory evaluation matrix completed; drive-systems trade-study completed and the prime concept presented; and variable-speed belt-drive concepts reviewed.

Not Available

1975-04-23T23:59:59.000Z

6

DOE Commercial Reference Buildings Summary of Changes Between Versions  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Buildings Buildings Summary of Changes between Versions November 2012 1 Applicable Model(s) Change Changes from version 1.2_4.0 to 1.3_5.0 All Transitioned from EnergyPlus 4.0 to EnergyPlus 5.0 All For fan power calculations, fan nameplate horsepower corrected from 90% brake horsepower to 110% brake horsepower All Removed multipliers on roof surface infiltration because EnergyPlus now counts the roof surface in infiltration per exterior surface area calculations All Added parking lot exterior lighting All Updated headers to reflect new name for technical report reference All models with DX cooling Changed COP calculation to remove fan power at ARI conditions, not max. allowable fan power (see Ref. Bldgs. Technical Report for more info.) All models with DX cooling Changed cooling performance curves to reflect

7

Design and development of Stirling engines for stationary power generation applications in the 500 to 3000 horsepower range. Volume 1. Technical report  

SciTech Connect

This project was Phase I of a multiphased program for the design and development of Stirling engines for stationary power generation applications in the 500 to 3000 horsepower range. Phase I comprised the conceptual design and associated cost estimates of a stationary Stirling engine capable of being fueled by a variety of heat sources, with emphasis on coal firing, followed by the preparation of a plan for implementing the design, fabrication and testing of a demonstration engine by 1985. The development and evaluation of conceptual designs have been separated into two broad categories: the A designs which represent the present state-of-the-art and which are demonstrable by 1985 with minimum technical risk; and the B designs which involve advanced technology and therefore would require significant research and development prior to demonstration and commercialization, but which may ultimately offer advantages in terms of lower cost, better performance, or higher reliability. The majority of the effort in Phase I was devoted to the A designs.

Not Available,

1980-09-15T23:59:59.000Z

8

Intensification of Ocean Fronts by Down-Front Winds  

Science Conference Proceedings (OSTI)

Many ocean fronts experience strong local atmospheric forcing by down-front winds, that is, winds blowing in the direction of the frontal jet. An analytic theory and nonhydrostatic numerical simulations are used to demonstrate the mechanism by ...

Leif N. Thomas; Craig M. Lee

2005-06-01T23:59:59.000Z

9

The German Front Experiment 1987  

Science Conference Proceedings (OSTI)

The German Front Experiment, 1987 (GFE87) is a field experiment using aircraft, radar, surface, and upper-air observations to determine the influence of the European Alps on cold fronts. Measurements are concentrated in the Rhine Valley and in ...

Klaus P. Hoinka; Hans Volkert

1987-11-01T23:59:59.000Z

10

Design and development of Stirling engines for stationary power generation applications in the 500 to 3000 horsepower range. First quarterly report  

SciTech Connect

This project is Phase I of a multi-phased program for the design and development of Stirling engines for stationary power generation applications in the 500 to 3000 horsepower range. Phase I comprises the conceptual design and associated cost estimates of a stationary Stirling engine capable of being fueled by a variety of heat sources, with emphasis on coal firing, followed by the preparation of a plan for implementing the design, fabrication and testing of a demonstration engine by 1985. The main effort in Phase I is the generation of state-of-the-art conceptual designs having greatest potential for prototype testing in 1985. The conceptual designs include a heat transport system for integrating the engine heater head with such energy sources as conventional oil/gas combustors, fluidized bed and other coal combustors, and combustors using coal-derived liquid fuels, and low/medium BTU gases. The heat transport systems being investigated include forced convection with gases or liquids, heat pipes, and direct firing. Currently, the leading choice for the solid fuel combustion system is the atmospheric fluidized bed, with low BTU gasification still a viable alternative. Both systems will continue to be evaluated further, but with greater emphasis on FBC. To date, there appears no clear choice among the heat pipe, forced convection gas loop, or direct firing as the prime candidate for the heat transport sub-system. Conceptual design and analysis will continue on all three sub-systems. Scale-up of United Stirling's P-75 engine to serve as the conceptual design of the 500 HP engine module is continuing. (LCL)

Not Available,

1980-01-07T23:59:59.000Z

11

Cold Fronts Research Programme: Progress, Future Plans, and Research Directions  

Science Conference Proceedings (OSTI)

Following the analysis of data collected during Phases land II of the Cold Fronts Research Programme (CFRP) a conceptual model for the Australian summertime “cool change” has been proposed. The model provides a focus and a framework for the ...

B. F. Ryan; J. R. Garratt; K. J. Wilson; R. K. Smith

1985-09-01T23:59:59.000Z

12

Cold Fronts in CDM clusters  

E-Print Network (OSTI)

Recently, high-resolution Chandra observations revealed the existence of very sharp features in the X-ray surface brightness and temperature maps of several clusters (Vikhlinin et. al., 2001). These features, called ``cold fronts'', are characterized by an increase in surface brightness by a factor >2 over 10-50 kpc, accompanied by a drop in temperature of a similar magnitude. The existence of such sharp gradients can be used to put interesting constraints on the physics of the intracluster medium (ICM), if their mechanism and longevity are well understood. Here, we present results of a search for cold fronts in high-resolution simulations of galaxy clusters in cold dark matter (CDM) models. We show that sharp gradients with properties similar to those of observed cold fronts naturally arise in cluster mergers when the shocks heat gas surrounding the merging sub-cluster, while its dense core remains relatively cold. The compression induced by supersonic motions and shock heating during the merger enhance the amplitude of gas density and temperature gradients across the front. Our results indicate that cold fronts are non-equilibrium transient phenomena and can be observed for a period of less than a billion years. We show that the velocity and density fields of gas surrounding the cold front can be very irregular which would complicate analyses aiming to put constraints on the physical conditions of the intracluster medium in the vicinity of the front.

Daisuke Nagai; Andrey V. Kravtsov

2002-06-26T23:59:59.000Z

13

Parametric Study of Front-End Nuclear Fuel Cycle Costs  

Science Conference Proceedings (OSTI)

This study provides an overview of front-end fuel cost components for nuclear plants, specifically uranium concentrates, uranium conversion services, uranium enrichment services, and nuclear fuel fabrication services. A parametric analysis of light-water reactor (LWR) fuel cycle costs is also included in order to quantify the impacts that result from changes in the cost of one or more front-end components on overall fuel cycle costs.

2009-02-20T23:59:59.000Z

14

The Sea-Breeze Front Analytical Model  

Science Conference Proceedings (OSTI)

Analytical solutions to the nonlinear equations of motion are used to describe the sea breeze front.

Yizhak Feliks

1988-03-01T23:59:59.000Z

15

Observations of the Tasman Front  

Science Conference Proceedings (OSTI)

Ship and air surveys were conducted in 1978–79 to examine the thermal structure in and near the Tasman Front between Australia and New Zealand at latitudes between Brisbane and Bass Strait. After separation from the continental slope, the East ...

John C. Andrews; Martin W. Lawrence; Carl S. Nilsson

1980-11-01T23:59:59.000Z

16

Light-Front Quantization and QCD Phenomena  

E-Print Network (OSTI)

The light-front quantization of QCD provides an alternative to lattice gauge theory for computing the mass spectrum, scattering amplitudes, and other physical properties of hadrons directly in Minkowski space. Nonperturbative light-front methods for solving gauge theory and obtaining light-front wavefunctions, such as discretized light-front quantization, the transverse lattice, and light-front resolvents are reviewed. The resulting light-front wavefunctions give a frame-independent interpolation between hadrons and their quark and gluon degrees of freedom, including an exact representation of spacelike form factors, transition form factors such as $B \\to \\ell \\bar \

S. J. Brodsky

2003-11-05T23:59:59.000Z

17

Kelvin Fronts on the Equatorial Thermocline  

Science Conference Proceedings (OSTI)

Properties of internal wave fronts or Kelvin fronts travelling eastward in the equatorial waveguide are studied, motivated by recent studies on coastal Kelvin waves and jumps and new data on equatorial Kelvin waves. It has been recognized for ...

Alexey V. Fedorov; W. Kendall Melville

2000-07-01T23:59:59.000Z

18

PV Frontogenesis and Upper-Tropospheric Fronts  

Science Conference Proceedings (OSTI)

Upper-tropospheric fronts and frontogenesis are viewed from a potental vorticity (PV) perspective. The rudiments of this approach are to regard such a front as a zone of strong PV gradient on isentropic surfaces, and to treat the accompanying ...

H. C. Davies; A. M. Rossa

1998-06-01T23:59:59.000Z

19

Turbulent Mixing at the Pacific Subtropical Front  

Science Conference Proceedings (OSTI)

Some advection of water across the North Pacific subtropical front occurs by the subduction of surface mixed layers from the north side of the front underneath surface waters on the south side. Cross-frontal advection in the thermocline is ...

Rolf G. Lueck

1988-12-01T23:59:59.000Z

20

front  

NLE Websites -- All DOE Office Websites (Extended Search)

Carbon Carbon Carbon Sequestration Sequestration State of the Science roadmapping future carbon sequestration R&D February 1999 A working paper for U.S. Department of Energy Office of Science Office of Fossil Energy i Carbon Sequestration DRAFT (February 1999) Dave Reichle, ORNL John Houghton, DOE Sally Benson, LBNL John Clarke, PNNL Roger Dahlman, DOE George Hendrey, BNL Howard Herzog, MIT Jennie Hunter-Cevera, LBNL Gary Jacobs, ORNL Rod Judkins, ORNL WORKING PAPER ON CARBON SEQUESTRATION SCIENCE AND TECHNOLOGY Office of Science Office of Fossil Energy U.S. Department of Energy Bob Kane, DOE Jim Ekmann, FETC Joan Ogden, Princeton Anna Palmisano, DOE Robert Socolow, Princeton John Stringer, EPRI Terry Surles, LLNL Alan Wolsky, ANL Nicholas Woodward, DOE Michael York, DOE ii DRAFT (February 1999) Carbon Sequestration

Note: This page contains sample records for the topic "horsepower change front" 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

Observation of Atmospheric Fronts Using Raman Lidar Moisture Measurements  

Science Conference Proceedings (OSTI)

This paper presents the results of a field program using a ground-based Raman lidar system to observe changes in moisture profiles as a cold and a warm front passed over the NASA/Goddard Space Flight Center in Greenbelt, Maryland. The lidar ...

S. H. Melfi; D. Whiteman; R. Ferrare

1989-09-01T23:59:59.000Z

22

BLM Sierra Front Field Office | Open Energy Information  

Open Energy Info (EERE)

Sierra Front Field Office Jump to: navigation, search Name BLM Sierra Front Field Office Short Name Sierra Front Parent Organization BLM Carson City District Office Address 5665...

23

Light-Front Holographic QCD  

SciTech Connect

The relation between the hadronic short-distance constituent quark and gluon particle limit and the long-range confining domain is yet one of the most challenging aspects of particle physics due to the strong coupling nature of Quantum Chromodynamics, the fundamental theory of the strong interactions. The central question is how one can compute hadronic properties from first principles; i.e., directly from the QCD Lagrangian. The most successful theoretical approach thus far has been to quantize QCD on discrete lattices in Euclidean space-time. Lattice numerical results follow from computation of frame-dependent moments of distributions in Euclidean space and dynamical observables in Minkowski spacetime, such as the time-like hadronic form factors, are not amenable to Euclidean lattice computations. The Dyson-Schwinger methods have led to many important insights, such as the infrared fixed point behavior of the strong coupling constant, but in practice, the analyses are limited to ladder approximation in Landau gauge. Baryon spectroscopy and the excitation dynamics of nucleon resonances encoded in the nucleon transition form factors can provide fundamental insight into the strong-coupling dynamics of QCD. New theoretical tools are thus of primary interest for the interpretation of the results expected at the new mass scale and kinematic regions accessible to the JLab 12 GeV Upgrade Project. The AdS/CFT correspondence between gravity or string theory on a higher-dimensional anti-de Sitter (AdS) space and conformal field theories in physical space-time has led to a semiclassical approximation for strongly-coupled QCD, which provides physical insights into its nonperturbative dynamics. The correspondence is holographic in the sense that it determines a duality between theories in different number of space-time dimensions. This geometric approach leads in fact to a simple analytical and phenomenologically compelling nonperturbative approximation to the full light-front QCD Hamiltonian 'Light-Front Holography'. Light-Front Holography is in fact one of the most remarkable features of the AdS/CFT correspondence. The Hamiltonian equation of motion in the light-front (LF) is frame independent and has a structure similar to eigenmode equations in AdS space. This makes a direct connection of QCD with AdS/CFT methods possible. Remarkably, the AdS equations correspond to the kinetic energy terms of the partons inside a hadron, whereas the interaction terms build confinement and correspond to the truncation of AdS space in an effective dual gravity approximation. One can also study the gauge/gravity duality starting from the bound-state structure of hadrons in QCD quantized in the light-front. The LF Lorentz-invariant Hamiltonian equation for the relativistic bound-state system is P{sub {mu}}P{sup {mu}}|{psi}(P)> = (P{sup +}P{sup -} - P{sub {perpendicular}}{sup 2})|{psi}(P)> = M{sup 2}|{psi}(P)>, P{sup {+-}} = P{sup 0} {+-} P{sup 3}, where the LF time evolution operator P{sup -} is determined canonically from the QCD Lagrangian. To a first semiclassical approximation, where quantum loops and quark masses are not included, this leads to a LF Hamiltonian equation which describes the bound-state dynamics of light hadrons in terms of an invariant impact variable {zeta} which measures the separation of the partons within the hadron at equal light-front time {tau} = x{sup 0} + x{sup 3}. This allows us to identify the holographic variable z in AdS space with an impact variable {zeta}. The resulting Lorentz-invariant Schroedinger equation for general spin incorporates color confinement and is systematically improvable. Light-front holographic methods were originally introduced by matching the electromagnetic current matrix elements in AdS space with the corresponding expression using LF theory in physical space time. It was also shown that one obtains identical holographic mapping using the matrix elements of the energy-momentum tensor by perturbing the AdS metric around its static solution. A gravity dual to QCD is not known, but th

Brodsky, Stanley J.; /SLAC /Southern Denmark U., CP3-Origins; de Teramond, Guy F.; /Costa Rica U.

2012-02-16T23:59:59.000Z

24

On the propagation of a coupled saturation and pressure front  

SciTech Connect

Using an asymptotic technique, valid for a medium with smoothly varying heterogeneity, I derive an expression for the velocity of a propagating, coupled saturation and pressure front. Due to the nonlinearity of the governing equations, the velocity of the propagating front depends upon the magnitude of the saturation and pressure changes across the front in addition to the properties of the medium. Thus, the expression must be evaluated in conjunction with numerical reservoir simulation. The propagation of the two-phase front is governed by the background saturation distribution, the saturation-dependent component of the fluid mobility, the porosity, the permeability, the capillary pressure function, the medium compressibility, and the ratio of the slopes of the relative permeability curves. Numerical simulation of water injection into a porous layer saturated with a nonaqueous phase liquid indicates that two modes of propagation are important. The fastest mode of propagation is a pressure-dominated disturbance that travels through the saturated layer. This is followed, much later, by a coupled mode with a large saturation change. These two modes are also observed in a simulation using a heterogeneous porous layer. A comparison between the propagation times estimated from the results of the numerical simulation and predictions from the asymptotic expression indicates overall agreement.

Vasco, D. W.

2010-12-01T23:59:59.000Z

25

Front Vehicle Setup Information Downloadable Dynamometer Database...  

NLE Websites -- All DOE Office Websites (Extended Search)

Chevrolet Volt- 20F Test cell location Front Vehicle Setup Information Downloadable Dynamometer Database (D 3 )- Test Summary Sheet Vehicle architecture EREV Vehicle dynamometer...

26

Mesoscale Modeling of a Cold Front and Its Interaction with a Diurnally Heated Land Mass  

Science Conference Proceedings (OSTI)

A mesoscale numerical model incorporating a detailed planetary boundary-layer scheme, including momentum, heat and moisture exchange with the lower boundary, is used to study the change in structure of a dry summertime front as it moves towards a ...

William L. Physick

1988-11-01T23:59:59.000Z

27

Intrusion Characteristics in the Antarctic Polar Front  

Science Conference Proceedings (OSTI)

Data obtained on two cruises to the Antarctic Polar Front are used to investigate the nature of thermohaline intrusions in the front. These data, obtained in the Drake Passage and south of New Zealand, include CTD time series made relative to ...

John M. Toole

1981-06-01T23:59:59.000Z

28

The light-front vacuum and dynamics  

E-Print Network (OSTI)

I give a quantum theoretical description of kinematically invariant vacuua on the algebra of free fields restricted to a light front and discuss the relation between the light-front Hamiltonian, P-, the vacuum, and Poincare invariance. This provides a quantum theoretical description of zero modes.

W. N. Polyzou

2004-09-22T23:59:59.000Z

29

Cold Front Acceleration over Lake Michigan  

Science Conference Proceedings (OSTI)

High-resolution Eta Model simulations of a strong but relatively dry late winter surface cold front that occurred during the STORM-FEST project depicted a pronounced acceleration of the front during the afternoon hours over the southern end of ...

William A. Gallus Jr.; Moti Segal

1999-10-01T23:59:59.000Z

30

Pressure transient method for front tracking  

DOE Green Energy (OSTI)

A pressure transient technique for tracking the advance of cold water fronts during water flooding and goethermal injection operations has been developed. The technique is based on the concept that the steady state pressure buildup in the reservoir region inside the front can be calculated by a fluid skin factor. By analyzing successive pressure falloff tests, the advance of the front in the reservoir can be monitored. The validity of the methods is demonstrated by application to three numerically simulated data sets, a nonisothermal step-rate injection test, a series of pressure falloffs in a multilayered reservoir, and a series of pressure falloff tests in a water flooded oil reservoir.

Benson, S.M.; Bodvarsson, G.S.

1983-08-01T23:59:59.000Z

31

Bay Front Biomass Facility | Open Energy Information  

Open Energy Info (EERE)

Front Biomass Facility Front Biomass Facility Jump to: navigation, search Name Bay Front Biomass Facility Facility Bay Front Sector Biomass Location Ashland County, Wisconsin Coordinates 46.9794969°, -90.4824892° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":46.9794969,"lon":-90.4824892,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

32

Climatology of Strong Intermountain Cold Fronts  

Science Conference Proceedings (OSTI)

Motivated by the intensity and severity of winds and temperature falls that frequently accompany rapidly developing cold fronts in northern Utah, this paper presents a 25-yr climatology of strong cold frontal passages over the Intermountain West ...

Jason C. Shafer; W. James Steenburgh

2008-03-01T23:59:59.000Z

33

On the Minimum Scale of Surface Fronts  

Science Conference Proceedings (OSTI)

A series of numerical experiments of a surface front forced by stretching deformation using Clark's nonhydrostatic model at very high resolution is presented. These simulations are compared to those reported by Williams who used hydrostatic ...

R. L. Gall; R. T. Williams; T. L. Clark

1987-09-01T23:59:59.000Z

34

Moist Convection at a Surface Cold Front  

Science Conference Proceedings (OSTI)

The motion of a surface cold front in an environment that is unstable to moist convection is studied with the aid ofboth hydrostatic and nonhydrostatic two-dimensional models. Simulations with the hydrostatic model essentially extend the work ...

N. Andrew Crook

1987-12-01T23:59:59.000Z

35

On the stability of subsonic thermal fronts  

Science Conference Proceedings (OSTI)

The stability of subsonic thermal fronts against corrugation is analyzed and an exact dispersion relation is obtained taking into account the compressibility of the gas. For heat fronts, this dispersion equation has an unstable root ({omega}{sub ex}) corresponding to the Landau-Darrieus unstable mode ({omega}{sub 0}) modified by the compressional effects. In particular, the exact solution shows a conspicuous maximum very close to the value of the intake Mach number M{sub 1} at which a Chapman-Jouguet deflagration wave behind the heat front is formed. Cooling fronts are stable for corrugation-like disturbances. A maximum damping as well as a maximum in the frequency occur at a value of M{sub 1} depending on the value of the normalized cooling q.

Ibanez S, Miguel H.; Shchekinov, Yuri; Bessega L, Maria C. [Centro de Fisica Fundamental, Facultad de Ciencias, Universidad de los Andes, Apartado 26, Ipostel, La Hechicera, Merida (Venezuela); Department of Physics, University of Rostov, Rostov on Don, 34409 (Russian Federation); Centro de Fisica Teorica y Computacional, Escuela de Fisica, Facultad de Ciencias, Universidad Central de Venezuela, Caracas (Venezuela)

2005-08-15T23:59:59.000Z

36

The Formation of New England Coastal Fronts  

Science Conference Proceedings (OSTI)

Coastal fronts are a frequent late fall and early winter feature of eastern New England weather. Data from a mesoscale observing network is used to describe the process of coastal frontogenesis and to determine the causes of formation. Three ...

John W. Nielsen

1989-07-01T23:59:59.000Z

37

Stationary Shock Fronts in a Continuously Stratified Thermocline Model  

Science Conference Proceedings (OSTI)

Fronts are ubiquitous in the ocean. Recent work by Dewar has considered the formation of oceanic fronts in a simple layered model.

A. J. George Nurser

1995-12-01T23:59:59.000Z

38

QCD and Light-Front Dynamics  

SciTech Connect

AdS/QCD, the correspondence between theories in a dilaton-modified five-dimensional anti-de Sitter space and confining field theories in physical space-time, provides a remarkable semiclassical model for hadron physics. Light-front holography allows hadronic amplitudes in the AdS fifth dimension to be mapped to frame-independent light-front wavefunctions of hadrons in physical space-time. The result is a single-variable light-front Schroedinger equation which determines the eigenspectrum and the light-front wavefunctions of hadrons for general spin and orbital angular momentum. The coordinate z in AdS space is uniquely identified with a Lorentz-invariant coordinate {zeta} which measures the separation of the constituents within a hadron at equal light-front time and determines the off-shell dynamics of the bound state wavefunctions as a function of the invariant mass of the constituents. The hadron eigenstates generally have components with different orbital angular momentum; e.g., the proton eigenstate in AdS/QCD with massless quarks has L = 0 and L = 1 light-front Fock components with equal probability. Higher Fock states with extra quark-anti quark pairs also arise. The soft-wall model also predicts the form of the nonperturbative effective coupling and its {beta}-function. The AdS/QCD model can be systematically improved by using its complete orthonormal solutions to diagonalize the full QCD light-front Hamiltonian or by applying the Lippmann-Schwinger method to systematically include QCD interaction terms. Some novel features of QCD are discussed, including the consequences of confinement for quark and gluon condensates. A method for computing the hadronization of quark and gluon jets at the amplitude level is outlined.

Brodsky, Stanley J.; de Teramond, Guy F.; /SLAC /Southern Denmark U., CP3-Origins /Costa Rica U.

2011-01-10T23:59:59.000Z

39

Light-Front Holography and the Light-Front Schrodinger Equation  

SciTech Connect

One of the most important nonperturbative methods for solving QCD is quantization at fixed light-front time {tau} = t+z=c - Dirac's 'Front Form'. The eigenvalues of the light-front QCD Hamiltonian predict the hadron spectrum and the eigensolutions provide the light-front wavefunctions which describe hadron structure. More generally, we show that the valence Fock-state wavefunctions of the light-front QCD Hamiltonian satisfy a single-variable relativistic equation of motion, analogous to the nonrelativistic radial Schrodinger equation, with an effective confining potential U which systematically incorporates the effects of higher quark and gluon Fock states. We outline a method for computing the required potential from first principles in QCD. The holographic mapping of gravity in AdS space to QCD, quantized at fixed light-front time, yields the same light front Schrodinger equation; in fact, the soft-wall AdS/QCD approach provides a model for the light-front potential which is color-confining and reproduces well the light-hadron spectrum. One also derives via light-front holography a precise relation between the bound-state amplitudes in the fifth dimension of AdS space and the boost-invariant light-front wavefunctions describing the internal structure of hadrons in physical space-time. The elastic and transition form factors of the pion and the nucleons are found to be well described in this framework. The light-front AdS/QCD holographic approach thus gives a frame-independent first approximation of the color-confining dynamics, spectroscopy, and excitation spectra of relativistic light-quark bound states in QCD.

Brodsky, Stanley J.; de Teramond, Guy

2012-08-15T23:59:59.000Z

40

DSD front models : nonideal explosive detonation  

SciTech Connect

The Detonation Shock Dynamics (DSD) method for propagating detonation in numerical simulation of detonation in high explosive (HE) is based on three elements: (1) a subscale theory of multi-dimensional detonation that treats the evolving detonation as a front with dynamics that depends only on metrics of the front (such as curvature, etc.), (2) high-resolution direct numerical sirnuliltion of detonation serving both to test existing subscale theories and suggest modifications, and (3) physical experiments to characterize multi-dimensional detonation propagation on real explosives and to calibrate the front models for use in engineering simulations. In this paper we describe our work on all three of these elements of the DSD method as it applies to detonation in nonideal explosives.

Bdzil, J. B. (John Bohdan); Short, M. (Mark Short); Aslam, T. D. (Tariq D.); Catanach, R. A. (Richard A.); Hill, L. G. (Larry G.)

2001-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "horsepower change front" 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

An Instability of Mature Cold Fronts  

Science Conference Proceedings (OSTI)

An instability of a cold front possessing a low-level warm-band precursor is examined within an f-plane, quasi- and semigeostrophic framework. The basic frontal state is taken to be two-dimensional and of uniform potential vorticity. Theoretical ...

Christoph Schär; Huw C. Davies

1990-04-01T23:59:59.000Z

42

An Objective Climatology of Carolina Coastal Fronts  

E-Print Network (OSTI)

This study describes a simple objective method to identify cases of coastal frontogenesis offshore of the Carolinas and to characterize the sensible weather associated with frontal passage at measurement sites near the coast. The identification method, based on surface hourly data from offshore and adjacent land stations, was applied to an 11-yr dataset (1984–94). A total of 379 coastal fronts was found, 70 of which eventually made landfall along the North Carolina coast; 112 that remained offshore, and 197 were termed diurnal since they remained offshore but disappeared during daylight hours. Results show that most coastal and offshore sites experience a wind shift of about 40°–70 ° and a warming of about 2°–3°C during the hour of frontal passage. Exceptions include sites near colder waters where the rates are markedly reduced and frontal passage is often less discernible. Excluding diurnal fronts, just over half the cases were associated with cold-air damming (CAD) during the cold season of 16 October–15 April. Most of these winter cases linked with CAD were onshore fronts. During the warm season, most fronts were diurnal, but the association with CAD was still significant. To explore the synoptic-scale environment, composite maps for the cold season were generated for all three frontal subtypes from NCEP–NCAR reanalysis data. Results show a strong surface anticyclone

K. Wyat Appel; Allen J. Riordan; Timothy A. Holley

2004-01-01T23:59:59.000Z

43

A Conservative Front Tracking Method in N-Dimensions  

Science Conference Proceedings (OSTI)

We propose a fully conservative Front Tracking algorithm for systems of nonlinear conservation laws. The algorithm can be applied uniformly in one, two, three and N dimensions. Implementation details for this algorithm ... Keywords: Front tracking, conservation, discontinuity

Jinjie Liu; Hyun-Kyung Lim; James Glimm; Xiaolin Li

2007-05-01T23:59:59.000Z

44

The Vertical Structure of New England Coastal Fronts  

Science Conference Proceedings (OSTI)

Aircraft data from the New England Winter Storms Experiment (NEWSEX) are used to examine the vertical structure of four New England coastal fronts. The aircraft made multiple passes at varying elevations through the coastal fronts. The ...

John W. Nielsen; Peter P. Neilley

1990-09-01T23:59:59.000Z

45

Mutual Intrusion of a Gravity Current and Density Front Formation  

Science Conference Proceedings (OSTI)

A two-dimensional prognostic model was employed to examine the mutual intrusion of a gravity current and the formation of a density front. The results indicated strong vertical motion near the front and, with Earth rotation included, a baroclinic ...

Dono-Ping Wang

1984-07-01T23:59:59.000Z

46

Progress with the SNS front-end systems  

E-Print Network (OSTI)

47317 PROGRESS WITH THE SNS FRONT-END SYSTEMS* R. Keller,**the FES Team, “Status of the SNS Front-End Sys- tems, Paperof the LEBT Layout for SNS,” Paper MOD19, Linac 2000,

2001-01-01T23:59:59.000Z

47

Gust Front Characteristics as Detected by Doppler Radar  

Science Conference Proceedings (OSTI)

Gust fronts produce low altitude wind shear that can be hazardous to aircraft operations, especially during takeoff and landing. Radar meteorologists have long been able to identify gust front signatures in Doppler radar data, but in order to use ...

Diana L. Klingle; David R. Smith; Marilyn M. Wolfson

1987-05-01T23:59:59.000Z

48

Front Range Energy LLC | Open Energy Information  

Open Energy Info (EERE)

Energy LLC Energy LLC Jump to: navigation, search Logo: Front Range Energy LLC Name Front Range Energy LLC Address 31375 Great Western Dr Place Windsor, Colorado Zip 80550 Sector Biofuels Product Ethanol producer Website http://www.frontrangeenergy.co Coordinates 40.4605154°, -104.8565272° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.4605154,"lon":-104.8565272,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

49

Pentan isomers compound flame front structure  

DOE Green Energy (OSTI)

The fuels (hexane, pentane, diethyl ether) and conditions investigated in this study are relevant to engine knock in spark- ignition engines. A review is provided of the field of low temperature hydrocarbon oxidation. Studies were made of radical and stable intermediate distribution in the front of cool flames: Maximum concentrations of H atoms and peroxy radicals were observed in the luminous zone of the cool flame front. Peroxy radicals appear before the luminous zone at 430 K due to diffusion. H atoms were found in cool flames of butane and hexane. H atoms diffuses from the luminous zone to the side of the fresh mixture, and they penetrate into the fresh mixture to a small depth. Extension of action sphear of peroxy radicals in the fresh mixture is much greater than that of H atoms due to their small activity and high concentrations.

Mansurov, Z.A.; Mironenko, A.W.; Bodikov, D.U.; Rachmetkaliev, K.N. [Kazakh Al-Farabi State National Univ., Almaty (Kazakhstan)

1995-08-13T23:59:59.000Z

50

Front contact solar cell with formed emitter  

SciTech Connect

A bipolar solar cell includes a backside junction formed by an N-type silicon substrate and a P-type polysilicon emitter formed on the backside of the solar cell. An antireflection layer may be formed on a textured front surface of the silicon substrate. A negative polarity metal contact on the front side of the solar cell makes an electrical connection to the substrate, while a positive polarity metal contact on the backside of the solar cell makes an electrical connection to the polysilicon emitter. An external electrical circuit may be connected to the negative and positive metal contacts to be powered by the solar cell. The positive polarity metal contact may form an infrared reflecting layer with an underlying dielectric layer for increased solar radiation collection.

Cousins, Peter John (Menlo Park, CA)

2012-07-17T23:59:59.000Z

51

Thermally induced wave-front distortions in laser windows  

SciTech Connect

A simple analytical expression is given for wave-front distortions and birefringence due to heating in laser windows. (AIP)

Greninger, C.E.

1986-08-01T23:59:59.000Z

52

An improved front tracking method for the Euler equations  

Science Conference Proceedings (OSTI)

An improved front tracking method for hyperbolic conservation laws is presented. The improved method accurately resolves discontinuities as well as continuous phenomena. The method is based on an improved front interaction model for a physically more ... Keywords: 35L65, 35L67, 65M12, 76L05, 76N15, Euler equations, Front tracking, Gas dynamics, Hyperbolic conservation laws

J. A. S. Witteveen; B. Koren; P. G. Bakker

2007-06-01T23:59:59.000Z

53

The Resonant Interaction of a Tropical Cyclone and a Tropopause Front in a Barotropic Model. Part I: Zonally Oriented Front  

Science Conference Proceedings (OSTI)

The interaction of a tropical cyclone and a zonally aligned tropopause front is investigated in an idealized framework. A nondivergent barotropic model is used in which the front is represented by a vorticity step, giving a jetlike velocity ...

Leonhard Scheck; Sarah C. Jones; Martin Juckes

2011-03-01T23:59:59.000Z

54

Spatially hybrid computations for streamer discharges with generic features of pulled fronts: I. Planar fronts  

Science Conference Proceedings (OSTI)

Streamers are the first stage of sparks and lightning; they grow due to a strongly enhanced electric field at their tips; this field is created by a thin curved space charge layer. These multiple scales are already challenging when the electrons are ... Keywords: 52.65.Kj, 52.80.Pi, Hybrid model, Large deviations, Pulled fronts, Streamer discharge

Chao Li; Ute Ebert; Willem Hundsdorfer

2010-01-01T23:59:59.000Z

55

Rayleigh-Taylor Instability of Ionization Front around Black Holes  

E-Print Network (OSTI)

We examine the role of ionizing radiation emitted from black holes (BHs) in suppressing the growth of the Rayleigh-Taylor instability (RTI) across the ionization front (I-front) that forms when the gas fueling the BH is neutral. We use radiation-hydrodynamic simulations to show that the RTI is suppressed for non-accelerating fronts on all scales resolved in our simulations. A necessary condition for the stability of the I-front is that the radius of the Str\\"omgren sphere is larger than the Bondi radius. When this condition is violated the I-front collapses producing an accretion luminosity burst. Transient growth of the RTI occurs only during the accretion burst when the effective acceleration in the frame of reference of the I-front increases significantly due to the rapid expansion of the Str\\"omgren sphere.

Park, KwangHo; Di Matteo, Tiziana; Reynolds, Christopher S

2013-01-01T23:59:59.000Z

56

Front Tracking Model of Simultaneous Melting and Solidification ...  

Science Conference Proceedings (OSTI)

This results in dynamic melting and solidification throughout the weld pool, which can be modelled using the authors' Front Tracking algorithm. Melting is ...

57

Front contact solar cell with formed electrically conducting layers on the front side and backside  

SciTech Connect

A bipolar solar cell includes a backside junction formed by a silicon substrate and a first doped layer of a first dopant type on the backside of the solar cell. A second doped layer of a second dopant type makes an electrical connection to the substrate from the front side of the solar cell. A first metal contact of a first electrical polarity electrically connects to the first doped layer on the backside of the solar cell, and a second metal contact of a second electrical polarity electrically connects to the second doped layer on the front side of the solar cell. An external electrical circuit may be electrically connected to the first and second metal contacts to be powered by the solar cell.

Cousins, Peter John

2012-06-26T23:59:59.000Z

58

FLUCTUATIONS OF THE FRONT IN A STOCHASTIC COMBUSTION MODEL  

E-Print Network (OSTI)

FLUCTUATIONS OF THE FRONT IN A STOCHASTIC COMBUSTION MODEL #1; (FLUCTUATIONS DU FRONT DANS UN MOD�LE DE COMBUSTION) FRANCIS COMETS 1 , JEREMY QUASTEL 2 AND ALEJANDRO F. RAMÍREZ 3 Abstract. We consider an interacting particle system on the one dimensional lattice Z modeling combustion. The process

Quastel, Jeremy

59

Combustion fronts in porous media with two layers Steve Schecter  

E-Print Network (OSTI)

Combustion fronts in porous media with two layers layer 1 layer 2 Steve Schecter North Carolina Subject: Propagation of a combustion front through a porous medium with two parallel layers having different properties. · Each layer admits a traveling combustion wave. · The layers are coupled by heat

Schecter, Stephen

60

On the existence of high Lewis number combustion fronts  

Science Conference Proceedings (OSTI)

We study a mathematical model for high Lewis number combustion processes with the reaction rate of the form of an Arrhenius law with or without an ignition cut-off. An efficient method for the proof of the existence and uniqueness of combustion fronts ... Keywords: Combustion fronts, Geometric singular perturbation theory, Ignition cut-off

Anna Ghazaryan; Christopher Jones

2012-02-01T23:59:59.000Z

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


61

Investigation of the Brazil Current front variability from altimeter data  

E-Print Network (OSTI)

Investigation of the Brazil Current front variability from altimeter data Gustavo J. Goni Atlantic, Brazil Abstract. The southwestern Atlantic Ocean is characterized by the confluence of the Brazil in conjunction with a two-layer dynamical ocean scheme to monitor the Brazil Current front and to investigate its

62

Topographic Effects on a Wintertime Cold Front in Taiwan  

Science Conference Proceedings (OSTI)

This paper describes an observational and numerical study of an intense wintertime cold front that occurred in Taiwan on 8 January 1996. The front was associated with rope clouds at the leading edge, and a broad area of stratiform clouds behind. ...

Fang-Ching Chien; Ying-Hwa Kuo

2006-11-01T23:59:59.000Z

63

Wind-Driven Motion near a Shelf-Slope Front  

Science Conference Proceedings (OSTI)

A two-dimensional, two-layered frontal system is used to examine the wind-driven motion near a shelf-slope front. In the linear regime, the along-frontal current is characterized by barotropic perturbations. The front is dynamically passive and ...

Hsien Wang Ou

1984-06-01T23:59:59.000Z

64

Front lighted optical tooling method and apparatus  

DOE Patents (OSTI)

An optical tooling method and apparatus uses a front lighted shadowgraphic technique to enhance visual contrast of reflected light. The apparatus includes an optical assembly including a fiducial mark, such as cross hairs, reflecting polarized light with a first polarization, a polarizing element backing the fiducial mark and a reflective surface backing the polarizing element for reflecting polarized light bypassing the fiducial mark and traveling through the polarizing element. The light reflected by the reflecting surface is directed through a second pass of the polarizing element toward the frontal direction with a polarization differing from the polarization of the light reflected by the fiducial mark. When used as a tooling target, the optical assembly may be mounted directly to a reference surface or may be secured in a mounting, such as a magnetic mounting. The optical assembly may also be mounted in a plane defining structure and used as a spherometer in conjunction with an optical depth measuring instrument. A method of measuring a radius of curvature of an unknown surface includes positioning the spherometer on a surface between the surface and a depth measuring optical instrument. As the spherometer is frontally illuminated, the distance from the depth measuring instrument to the fiducial mark and the underlying surface are alternately measured and the difference in these measurements is used as the sagittal height to calculate a radius of curvature.

Stone, William J. (Kansas City, MO)

1985-06-18T23:59:59.000Z

65

Light-Front Holographic QCD and the Confinement Potential  

E-Print Network (OSTI)

Light-Front Hamiltonian theory, derived from the quantization of the QCD Lagrangian at fixed light-front time \\tau = t+z/c, provides a rigorous frame-independent framework for solving nonperturbative QCD. The eigenvalues of the light-front QCD Hamiltonian predict the hadronic mass spectrum, and the eigensolutions provide the light-front wavefunctions describing hadron structure. The valence Fock-state wavefunctions of the light-front QCD Hamiltonian satisfy a single-variable relativistic equation of motion, analogous to the nonrelativistic radial Schrodinger equation, with an effective confining potential U which systematically incorporates the effects of higher quark and gluon Fock states. The potential U has a unique form if one requires that the action for zero quark mass remains conformally invariant. The holographic mapping of gravity in AdS space to QCD with a specific soft-wall dilaton yields the same light-front Schrodinger equation. It also gives a precise relation between the bound-state amplitudes in the fifth dimension z of AdS space and the boost-invariant light-front wavefunctions describing the internal structure of hadrons in physical space-time. The elastic and transition form factors of the pion and the nucleons are found to be well described in this framework. The predictions include a zero-mass pion in the chiral limit, and linear Regge trajectories with the same slope in the radial quantum number n and orbital angular momentum L. The light-front AdS/QCD holographic approach thus gives a frame-independent representation of color-confining dynamics and the excitation spectra of light-quark hadrons in terms of a single mass parameter. We also discuss the implications of the underlying conformal template of QCD for renormalization scale-setting and the implications of light-front quantization for the value of the cosmological constant.

Stanley J. Brodsky; Guy F. de Téramond; Hans Günter Dosch

2013-08-23T23:59:59.000Z

66

Helicase activity on DNA as a propagating front  

E-Print Network (OSTI)

We develop a propagating front analysis, in terms of a local probability of zipping, for the helicase activity of opening up a double stranded DNA (dsDNA). In a fixed-distance ensemble (conjugate to the fixed-force ensemble) the front separates the zipped and unzipped phases of a dsDNA and a drive acts locally around the front. Bounds from variational analysis and numerical estimates for the speed of a helicase are obtained. Different types of helicase behaviours can be distinguished by the nature of the drive.

Somendra M. Bhattacharjee

2003-07-16T23:59:59.000Z

67

Light front approach to correlations in hot quark matter  

E-Print Network (OSTI)

We investigate two-quark correlations in hot and dense quark matter. To this end we use the light front field theory extended to finite temperature $T$ and chemical potential $\\mu$. Therefore it is necessary to develop quantum statistics formulated on the light front plane. As a test case for light front quantization at finite $T$ and $\\mu$ we consider the NJL model. The solution of the in-medium gap equation leads to a constituent quark mass which depends on $T$ and $\\mu$. Two-quark systems are considered in the pionic and diquark channel. We compute the masses of the two-body system using a $T$-matrix approach.

S. Strauss; M. Beyer; S. Mattiello

2005-11-01T23:59:59.000Z

68

Diabatically Driven Discrete Propagation of Surface Fronts: A Numerical Analysis  

Science Conference Proceedings (OSTI)

Discrete frontal propagation has been identified as a process whereby a surface front discontinuously moves forward, without evidence of frontal passage across a mesoscale region. Numerical simulations are employed to examine the upper-level ...

George H. Bryan; J. Michael Fritsch

2000-07-01T23:59:59.000Z

69

A Marker Chain Front Tracking Method for Modelling Meniscus ...  

Science Conference Proceedings (OSTI)

Feb 1, 2002 ... A Marker Chain Front Tracking Method for Modelling Meniscus Dynamics in the Al Ingot Casting Process by F. Iversen, J.A. Bakken and S.T. ...

70

Formation and Maintenance of Shelfbreak Fronts in an Unstratified Flow  

Science Conference Proceedings (OSTI)

A depth-averaged model with no density variations was used by Chapman to describe the formation of a passive tracer front at a shelfbreak. The relevance of this frontogenesis mechanism to cases that allow vertical variations is examined by ...

Glen Gawarkiewicz; David C. Chapman

1991-08-01T23:59:59.000Z

71

Internal-Inertial Waves in a Surgasso Sea Front  

Science Conference Proceedings (OSTI)

This work examines the presence of internal-inertial waves in a front in the North Atlantic subtropical convergence zone. Results of Doppler shear profiler and towed thermistor chain surveys are displayed to document the position and magnitude of ...

Richard P. Mied; Colin Y. Shen; Clifford L. Trump; Gloria J. Lindemann

1986-11-01T23:59:59.000Z

72

Observations of Near-Inertial Waves in a Front  

Science Conference Proceedings (OSTI)

Near-inertial with horizontal scales O(10 km) dominate profiles of velocity finestructure collected in the North Pacific Subtropical Front during January 1980. Considerable spatial variability is observed. Two features in particular contain most ...

Eric Kunze; Thomas B. Sanford

1984-03-01T23:59:59.000Z

73

Meteorological Tower Measurements of a Surface Cold Front  

Science Conference Proceedings (OSTI)

measurements from the Boulder Atmospheric Observatory meteorological research tower are used to describe the structure and physical processes of a strong surface cold front. Analysis reveals that the horizontal gradients in temperature and wind ...

M. A. Shapiro

1984-08-01T23:59:59.000Z

74

Tracking Gravity Waves in Baroclinic Jet-Front Systems  

Science Conference Proceedings (OSTI)

Using a two-dimensional Fourier decomposition and a four-dimensional ray-tracing technique, the propagating characteristics and source mechanisms of mesoscale gravity waves simulated in idealized baroclinic jet-front systems are investigated. The ...

Yonghui Lin; Fuqing Zhang

2008-07-01T23:59:59.000Z

75

Advanced integrated safeguards using front-end-triggering devices  

SciTech Connect

This report addresses potential uses of front-end-triggering devices for enhanced safeguards. Such systems incorporate video surveillance as well as radiation and other sensors. Also covered in the report are integration issues and analysis techniques.

Howell, J.A.; Whitty, W.J.

1995-12-01T23:59:59.000Z

76

The Circulation Dynamics and Thermodynamics of Upper Ocean Density Fronts  

Science Conference Proceedings (OSTI)

This paper extends a previous hydrodynamic circulation model of established, persistent upper ocean density fronts by including a thermodynamic or buoyancy equation in the integral treatment. An analysis is also conducted of the variables related ...

Richard W. Garvine

1980-12-01T23:59:59.000Z

77

Generation and Separation of Mesoscale Eddies from Surface Ocean Fronts  

Science Conference Proceedings (OSTI)

This study is motivated by Arctic Ocean observations of sub-mixed layer eddies found at large distances from their assumed formation region of a surface ocean front. We explore eddy formation through high resolution numerical simulations of ...

Georgy E. Manucharyan; Mary-Louise Timmermans

78

Vertical Velocities in a Thunderstorm Gust Front and Outflow  

Science Conference Proceedings (OSTI)

Continuous vertically pointing measurements of a thunderstorm outflow, including its gust front, were obtained with a Doppler radar near New Salem, North Dakota. The measurements provide a high-resolution depiction of the vertical structure of ...

Brooks E. Martner

1997-05-01T23:59:59.000Z

79

Misocyclone Characteristics along Florida Gust Fronts during CaPE  

Science Conference Proceedings (OSTI)

Multiple-Doppler radar and rawinsonde data are used to examine misocyclone characteristics along gust fronts observed during the Convection and Precipitation/Electrification (CaPE) project in Florida. The objective of this study is to investigate ...

Katja Friedrich; David E. Kingsmill; Carl R. Young

2005-11-01T23:59:59.000Z

80

DOE Offers Conditional Loan Guarantee for Front End Nuclear Facility...  

NLE Websites -- All DOE Office Websites (Extended Search)

DOE Offers Conditional Loan Guarantee for Front End Nuclear Facility in Idaho Uranium Enrichment Project to Create Over 1,000 Jobs in Idaho Washington, DC As part of a broad...

Note: This page contains sample records for the topic "horsepower change front" 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

Observations of Seven Atmospheric Density Current Fronts in Dixon, California  

Science Conference Proceedings (OSTI)

Seven atmospheric density current fronts are identified in sequences of ground-based, scanning aerosol backscatter lidar images and in situ micrometeorological time series data that were collected simultaneously and nearly continuously between 15 ...

Shane D. Mayor

2011-05-01T23:59:59.000Z

82

Results of the SNS front end commissioning at Berkeley Lab  

E-Print Network (OSTI)

RESULTS OF THE SNS FRONT END COMMISSIONING AT BERKELEY LAB *USA A. Aleksandrov for the SNS Accelerator Physics Group andT. Shea for the SNS Beam Diagnostics Collaboration Oak Ridge

2002-01-01T23:59:59.000Z

83

The Behavior of Dry Cold Fronts Traveling Along a Coastline  

Science Conference Proceedings (OSTI)

Observations of intense, dry summertime cold fronts in southeast Australia provide evidence for frontal deformation (cold air surges) in the coastal region well to the west of the main mountain range. This compares with the severe deformation ...

J. R. Garratt; P. A. C. Howells; E. Kowalczyk

1989-06-01T23:59:59.000Z

84

A Geostrophic Adjustment Model of a Tidal Mixing Front  

Science Conference Proceedings (OSTI)

This paper presents a model of a tidal mixing front as occurring between well mixed and (seasonally) stratified water in tidally energetic areas in continental shelf seas. The model examines the geostrophic adjustment of a stratified two-layer ...

G. J. F. van Heijst

1985-09-01T23:59:59.000Z

85

Influence of Mesoscale Orography on Idealized Cold Fronts  

Science Conference Proceedings (OSTI)

A three-dimensional numerical model based on the inviscid and adiabatic primitive equations in the Boussinesq approximation is used to investigate the retardation of cold fronts by high two and three-dimensional mountains, approximately the same ...

U. Schumann

1987-12-01T23:59:59.000Z

86

Town of Front Royal, Virginia (Utility Company) | Open Energy Information  

Open Energy Info (EERE)

Town of Front Royal, Virginia (Utility Company) Town of Front Royal, Virginia (Utility Company) Jump to: navigation, search Name Town of Front Royal Place Virginia Utility Id 6803 Utility Location Yes Ownership M NERC Location SERC Activity Distribution Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png Commercial Commercial Dusk to Dawn Light poles Commercial Residential Residential Average Rates Residential: $0.0928/kWh Commercial: $0.0796/kWh References ↑ "EIA Form EIA-861 Final Data File for 2010 - File1_a" Retrieved from "http://en.openei.org/w/index.php?title=Town_of_Front_Royal,_Virginia_(Utility_Company)&oldid=411737"

87

Front Range Forest Health Partnership Phase 1 feasibility study  

DOE Green Energy (OSTI)

The Front Range Forest Health Partnership is an alliance of individuals, citizen groups, federal, state, private, and nonprofit organizations that formed to promote forest health restoration and reduce fire risks on Colorado's Front Range. The partnership promotes selective thinning to restore forest health and supports economically feasible end uses for wood waste materials. The Phase I study was initiated to determine the environmental and economic feasibility of using wood wastes from forested and urban areas for the production of fuel-grade ethanol.

Volkin, P

1998-09-01T23:59:59.000Z

88

Safety analysis of the 700-horsepower combustion test facility  

SciTech Connect

The objective of the program reported herein was to provide a Safety Analysis of the 700 h.p. Combustion Test Facility located in Building 93 at the Pittsburgh Energy Technology Center. Extensive safety related measures have been incorporated into the design, construction, and operation of the Combustion Test Facility. These include: nitrogen addition to the coal storage bin, slurry hopper, roller mill and pulverizer baghouse, use of low oxygen content combustion gas for coal conveying, an oxygen analyzer for the combustion gas, insulation on hot surfaces, proper classification of electrical equipment, process monitoring instrumentation and a planned remote television monitoring system. Analysis of the system considering these factors has resulted in the determination of overall probabilities of occurrence of hazards as shown in Table I. Implementation of the recommendations in this report will reduce these probabilities as indicated. The identified hazards include coal dust ignition by hot ductwork and equipment, loss of inerting within the coal conveying system leading to a coal dust fire, and ignition of hydrocarbon vapors or spilled oil, or slurry. The possibility of self-heating of coal was investigated. Implementation of the recommendations in this report will reduce the ignition probability to no more than 1 x 10/sup -6/ per event. In addition to fire and explosion hazards, there are potential exposures to materials which have been identified as hazardous to personal health, such as carbon monoxide, coal dust, hydrocarbon vapors, and oxygen deficient atmosphere, but past monitoring experience has not revealed any problem areas. The major environmental hazard is an oil spill. The facility has a comprehensive spill control plan.

Berkey, B.D.

1981-05-01T23:59:59.000Z

89

Study on reduction of accessory horsepower requirements. Program summary report  

SciTech Connect

The objective of this program was to define, evaluate and develop automotive accessory systems to minimize engine power consumption and significantly improve fuel economy. All tasks have been completed and the program objectives have been accomplished. Information is presented on each phase of the program which involved: conceptual design to recommended component improvement and accessory drive systems; performance and sizing analyses; detail design and specifications; fabrication, and performance testing; evaluation of integrated hybrid drive, improved accessories; and an advanced air conditioning concept.

Lefferts, C.H.

1977-06-15T23:59:59.000Z

90

Cross-Front Mixing and Frontal Upwelling in a Controlled Quasi-Permanent Density Front in the Gulf of St. Lawrence  

Science Conference Proceedings (OSTI)

CTD data obtained from three transects across a controlled quasi-permanent density front in the Gulf of St. Lawrence were analyzed for the purpose of investigating cross-front mixing, mechanisms for frontal convergence, secondary circulation ...

C. L. Tang

1983-08-01T23:59:59.000Z

91

NETL's Supercomputer Addresses Energy Issues on Two Fronts | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

NETL's Supercomputer Addresses Energy Issues on Two Fronts NETL's Supercomputer Addresses Energy Issues on Two Fronts NETL's Supercomputer Addresses Energy Issues on Two Fronts September 26, 2013 - 10:42am Addthis The visualization center for the SBEUC (Simulation Based Engineering User Center). Located at the Department’s National Energy Technology Laboratory in Morgantown, W. Va., the SBEUC will be powered by a high performance computer that will allow researchers to simulate phenomena that are difficult or impossible to probe experimentally. The results from simulations will become accessible through user centers that provide advanced visualization capabilities and foster collaboration among researchers. The SBEUC will be used for developing and deploying simulation tools required for overcoming energy technology barriers quickly and reliably.

92

Methods for enhancing mapping of thermal fronts in oil recovery  

DOE Patents (OSTI)

A method for enhancing the resistivity contrasts of a thermal front in an oil recovery production field as measured by the CSAMT technique is disclosed. This method includes the steps of: (a) preparing a CSAMT-determined topological resistivity map of the production field; (b) introducing a solution of a dopant material into the production field at a concentration effective to alter the resistivity associated with the thermal front; said dopant material having a high cation exchange capacity which might be selected from the group consisting of montmorillonite, illite, and chlorite clays; said material being soluble in the connate water of the production field; (c) preparing a CSAMT-determined topological resistivity map of the production field while said dopant material is moving therethrough; and (d) mathematically comparing the maps from step (a) and step (c) to determine the location of the thermal front. This method is effective with the steam flood, fire flood and water flood techniques.

Lee, David O. (Albuquerque, NM); Montoya, Paul C. (Albuquerque, NM); Wayland, Jr., James R. (Albuquerque, NM)

1987-01-01T23:59:59.000Z

93

Rayleigh-Taylor Instability at Ionization Fronts: Perturbation Analysis  

E-Print Network (OSTI)

The linear growth rate of the Rayleigh-Taylor instability (RTI) at ionization fronts is investigated via perturbation analysis in the limit of incompressible fluids. In agreement with previous numerical studies is found that absorption of ionizing radiation inside the HII region due to hydrogen recombinations suppresses the growth of instabilities. In the limit of a large density contrast at the ionization front the RTI growth rate has the simple analytical solution n=-nur+(nur^2+gk)^(1/2), where nur is the hydrogen recombination rate inside the HII region, k is the perturbation's wavenumber and g is the effective acceleration in the frame of reference of the front. Therefore, the growth of surface perturbations with wavelengths lambda >> lambda_{cr} = 2\\pi g/nur^2 is suppressed by a factor (lambda_{cr}/4lambda)^(1/2) with respect to the non-radiative incompressible RTI. Implications on stellar and black hole feedback are briefly discussed.

Ricotti, Massimo

2013-01-01T23:59:59.000Z

94

Methods for enhancing mapping of thermal fronts in oil recovery  

DOE Patents (OSTI)

A method for enhancing the resistivity contrasts of a thermal front in an oil recovery production field as measured by the controlled source audio frequency magnetotelluric (CSAMT) technique is disclosed. This method includes the steps of: (1) preparing a CSAMT-determined topological resistivity map of the production field; (2) introducing a solution of a dopant material into the production field at a concentration effective to alter the resistivity associated with the thermal front; said dopant material having a high cation exchange capacity which might be selected from the group consisting of montmorillonite, illite, and chlorite clays; said material being soluble in the conate water of the production field; (3) preparing a CSAMT-determined topological resistivity map of the production field while said dopant material is moving therethrough; and (4) mathematically comparing the maps from step (1) and step (3) to determine the location of the thermal front. This method is effective with the steam flood, fire flood and water flood techniques.

Lee, D.O.; Montoya, P.C.; Wayland, J.R. Jr.

1984-03-30T23:59:59.000Z

95

HINS Linac front end focusing system R&D  

SciTech Connect

This report summarizes current status of an R&D program to develop a focusing system for the front end of a superconducting RF linac. Superconducting solenoids will be used as focusing lenses in the low energy accelerating sections of the front end. The development of focusing lenses for the first accelerating section is in the production stage, and lens certification activities are in preparation at FNAL. The report contains information about the focusing lens design and performance, including solenoid, dipole corrector, and power leads, and about cryogenic system design and performance. It also describes the lens magnetic axis position measurement technique and discusses scope of an acceptance/certification process.

Apollinari, G.; Carcagno, R.H.; Dimarco, J.; Huang, Y.; Kashikhin, V.V.; Orris, D.F.; Page, T.M.; Rabehl, R.; Sylvester, C.; Tartaglia, M.A.; Terechkine, I.; /Fermilab /Argonne

2008-08-01T23:59:59.000Z

96

the Front Line of Medicine to Prevent Needless Work Disability  

E-Print Network (OSTI)

Preparing the Front Line of Medicine to Prevent Needless Work Disability: Private 4. Free on-line CME; "Medical Rounds" in a talk show format 3. Free live;6 Approaches 1. Sessions at exis9ng medical educa9on events 2. Offer of on-line CME training

97

Front and backside processed thin film electronic devices  

DOE Patents (OSTI)

This invention provides methods for fabricating thin film electronic devices with both front- and backside processing capabilities. Using these methods, high temperature processing steps may be carried out during both frontside and backside processing. The methods are well-suited for fabricating back-gate and double-gate field effect transistors, double-sided bipolar transistors and 3D integrated circuits.

Yuan, Hao-Chih (Madison, WI); Wang, Guogong (Madison, WI); Eriksson, Mark A. (Madison, WI); Evans, Paul G. (Madison, WI); Lagally, Max G. (Madison, WI); Ma, Zhenqiang (Middleton, WI)

2010-10-12T23:59:59.000Z

98

Mean Flow Evolution of a Baroclinically Unstable Potential Vorticity Front  

Science Conference Proceedings (OSTI)

Quasi-linear theory and numerical models are used to study the mean flow modification of a two-layer shallow water baroclinically unstable flow as a function of Rossby number. This flow has an upper-layer potential vorticity front overlying a ...

Emmanuel Boss; Lu Anne Thompson

1999-02-01T23:59:59.000Z

99

Dynamics of Potential Vorticity Fronts and Eddy Detachment  

Science Conference Proceedings (OSTI)

The formation and detachment of quasi-geostrophic eddies in a 1½ layer jet is studied using a piecewise uniform potential vorticity model. A vorticity front separates the two pieces, and thus the jet has cusplike character. The evolution of large ...

L. J. Pratt; Melvin E. Stern

1986-06-01T23:59:59.000Z

100

(front end fuel cycle) 2.1 (CANDU  

E-Print Network (OSTI)

2 (front end fuel cycle) 2.1 (CANDU: CANada Deuterium Uranium; . ( 2.2) . 70-80% , (uranium concentrate) . () 2.1 . 2.2 2.3 #12; 2; . Mine Car Load Skip Geiger Counter 8"~3/2"" . (2

Hong, Deog Ki

Note: This page contains sample records for the topic "horsepower change front" 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

Move-to-Front, Distance Coding, and Inversion Frequencies revisited  

Science Conference Proceedings (OSTI)

Move-to-Front, Distance Coding and Inversion Frequencies are three simple and effective techniques used to process the output of the Burrows-Wheeler Transform. In this paper we provide the first complete comparative analyses of these techniques, establishing ... Keywords: Burrows-Wheeler Transform, Data Compression, Empirical entropy

Travis Gagie; Giovanni Manzini

2010-06-01T23:59:59.000Z

102

Benthic Observations on the Madeira Abyssal Plain: Fronts  

Science Conference Proceedings (OSTI)

Analysis of data from a mooring with five vector-averaging current meters between 10 and 70 m above the bed of the Madeira Abyssal Plain reveals the existence of narrow regions with relatively large gradients of potential temperature, or “fronts.”...

S. A. Thorpe

1983-08-01T23:59:59.000Z

103

A FRONT END DESIGN FOR THE ADVANCED PHOTON SOURCE  

E-Print Network (OSTI)

X-ray sources on next generation low emittance/high brilliance synchrotrons such as the 7-GeV Advanced Photon Source (APS) (1) have unique properties which directly affect the design of the front end of the beam line. The most striking of these are the large peak photon power densities

P. J. Viccaro

1988-01-01T23:59:59.000Z

104

Front and backside processed thin film electronic devices  

Science Conference Proceedings (OSTI)

This invention provides thin film devices that have been processed on their front- and backside. The devices include an active layer that is sufficiently thin to be mechanically flexible. Examples of the devices include back-gate and double-gate field effect transistors, double-sided bipolar transistors and 3D integrated circuits.

Evans, Paul G. (Madison, WI); Lagally, Max G. (Madison, WI); Ma, Zhenqiang (Middleton, WI); Yuan, Hao-Chih (Lakewood, CO); Wang, Guogong (Madison, WI); Eriksson, Mark A. (Madison, WI)

2012-01-03T23:59:59.000Z

105

Kinematic and Moisture Characteristics of a Nonprecipitating Cold Front Observed during IHOP. Part I: Across-Front Structures  

Science Conference Proceedings (OSTI)

A wide array of ground-based and airborne instrumentation is used to examine the kinematic and moisture characteristics of a nonprecipitating cold front observed in west-central Kansas on 10 June 2002 during the International H2O Project (IHOP). ...

Katja Friedrich; David E. Kingsmill; Cyrille Flamant; Hanne V. Murphey; Roger M. Wakimoto

2008-01-01T23:59:59.000Z

106

Radio frequency circuits for wireless receiver front-ends  

E-Print Network (OSTI)

The beginning of the 21st century sees great development and demands on wireless communication technologies. Wireless technologies, either based on a cable replacement or on a networked environment, penetrate our daily life more rapidly than ever. Low operational power, low cost, small form factor, and function diversity are the crucial requirements for a successful wireless product. The receiver??s front-end circuits play an important role in faithfully recovering the information transmitted through the wireless channel. Bluetooth is a short-range cable replacement wireless technology. A Bluetooth receiver architecture was proposed and designed using a pure CMOS process. The front-end of the receiver consists of a low noise ampli?er (LNA) and mixer. The intermediate frequency was chosen to be 2MHz to save battery power and alleviate the low frequency noise problem. A conventional LNA architecture was used for reliability. The mixer is a modi?ed Gilbert-cell using the current bleeding technique to further reduce the low frequency noise. The front-end draws 10 mA current from a 3 V power supply, has a 8.5 dB noise ?gure, and a voltage gain of 25 dB and -9 dBm IIP3. A front-end for dual-mode receiver is also designed to explore the capability of a multi-standard application. The two standards are IEEE 802.11b and Bluetooth. They work together making the wireless experience more exciting. The front-end is designed using BiCMOS technology and incorporating a direct conversion receiver architecture. A number of circuit techniques are used in the front-end design to achieve optimal results. It consumes 13.6 mA from a 2.5 V power supply with a 5.5 dB noise ?gure, 33 dB voltage gain and -13 dBm IIP3. Besides the system level contributions, intensive studies were carried out on the development of quality LNA circuits. Based on the multi-gated LNA structure, a CMOS LNA structure using bipolar transistors to provide linearization is proposed. This LNA con?guration can achieve comparable linearity to its CMOS multi-gated counterpart and work at a higher frequency with less power consumption. A LNA using an on-chip transformer source degeneration is proposed to realize input impedance matching. The possibility of a dual-band cellular application is studied. Finally, a study on ultra-wide band (UWB) LNA implementation is performed to explore the possibility and capability of CMOS technology on the latest UWB standard for multimedia applications.

Xin, Chunyu

2004-08-01T23:59:59.000Z

107

A thousand words: themes and trends in home front poster propaganda of the second world war  

E-Print Network (OSTI)

Poster propaganda is one of the most memorable and enduring legacies of the Second World War. These artistic creations were strongly influenced by social and cultural paradigms as well as corresponding military events. Previous scholarship on propaganda has largely overlooked the role of posters and propaganda efforts on the home front, a gap that this study seeks to fill. The purpose of this study is to compare home front posters produced by the major nations involved in the European theatre and discern any trends or patterns that have a larger significance. Each poster in the sample was arranged chronologically by country. The area of emphasis (recruiting, production, etc.) and appeal (duty, guilt, fear, hate, etc.) for each poster was then recorded and analyzed. The analyses revealed several significant trends and patterns. The most important of these is that posters, regardless of which country produced them, tended to appeal to negative emotions (hate, fear, etc.) when the war was going badly and positive emotions (patriotism, duty, etc.) when the war was being won. Even when the areas of emphasis remained the same, the images, rhetoric and overall emotional tone of posters changed depending on the corresponding war situation. In other words, what a government said was not always as important as how they said it. This trend is equally significant today. Although posters have disappeared as a major propaganda tool, nations still fight wars and still carry out propaganda campaigns, therefore, if relationship between propaganda and the conduct of war presented in this study is applied to modern campaigns it provides the public with information that propaganda intends to keep secret: the truth about the war. Previous scholarship has mentioned this connection between propaganda methods and military operations, but as previously mentioned, these studies neglect both the home front and the poster, choosing to focus on propaganda directed at the enemy. Other patterns, such as the use of humor and religion in posters, are briefly touched on and provide possible areas for future research.

Thomas, Christopher C.

2003-05-01T23:59:59.000Z

108

An Investigation of an Arctic Front with a Vertically Nested Mesoscale Model  

Science Conference Proceedings (OSTI)

A vertically mesoscale regional numerical weather prediction model is used to simulate an arctic front. The front was observed during the Arctic Cyclone Expedition of 1984. The regional model employs a unique vertical nesting scheme in which the ...

William T. Thompson; Stephen D. Burk

1991-02-01T23:59:59.000Z

109

Cold Fronts with and without Prefrontal Wind Shifts in the Central United States  

Science Conference Proceedings (OSTI)

Time series of cold fronts from stations in the central United States possess incredible variety. For example, time series of some cold fronts exhibit a sharp temperature decrease coincident with a pressure trough and a distinct wind shift. Other ...

David M. Schultz

2004-08-01T23:59:59.000Z

110

Episodic Dust Events of Utah’s Wasatch Front and Adjoining Region  

Science Conference Proceedings (OSTI)

Episodic dust events cause hazardous air quality along Utah’s Wasatch Front and dust loading of the snowpack in the adjacent Wasatch Mountains. This paper presents a climatology of episodic dust events of the Wasatch Front and adjoining region ...

W. James Steenburgh; Jeffrey D. Massey; Thomas H. Painter

2012-09-01T23:59:59.000Z

111

The Development of the Piedmont Front and Associated Outbreak of Severe Weather on 13 March 1986  

Science Conference Proceedings (OSTI)

An investigation was conducted of the mesoscale evolution of a quasi-stationary front, termed the Piedmont front owing to its location through the central Carolinas, and an associated outbreak of severe weather on 13 March 1986. Space-time ...

Steven Businger; William H. Bauman III; Gerald F. Watson

1991-09-01T23:59:59.000Z

112

Low-Frequency Variability in the Midlatitude Baroclinic Atmosphere Induced by an Oceanic Thermal Front  

Science Conference Proceedings (OSTI)

This study examines the flow induced by an east–west-oriented oceanic thermal front in a highly idealized baroclinic model. Previous work showed that thermal fronts could produce energetic midlatitude jets in an equivalent-barotropic atmosphere ...

Yizhak Feliks; Michael Ghil; Eric Simonnet

2007-01-01T23:59:59.000Z

113

Two Types of Surface Wind Response to the East China Sea Kuroshio Front  

Science Conference Proceedings (OSTI)

Effects of the sea surface temperature (SST) front along the East China Sea Kuroshio on sea surface winds at different time scales are investigated. In winter and spring, the climatological vector wind is strongest on the SST front while the ...

Jing-Wu Liu; Su-Ping Zhang; Shang-Ping Xie

2013-11-01T23:59:59.000Z

114

Mesoscale Subduction at the Antarctic Polar Front Driven by Baroclinic Instability  

Science Conference Proceedings (OSTI)

A study of mesoscale subduction at the Antarctic Polar Front (PF) is conducted by use of hydrographic data from a high-resolution, quasi-synoptic survey of the front. The geostrophic velocity and isopycnal potential vorticity (PV) fields are ...

Alberto C. Naveira Garabato; Harry Leach; John T. Allen; Raymond T. Pollard; Volker H. Strass

2001-08-01T23:59:59.000Z

115

Front-end utility rate updates | OpenEI Community  

Open Energy Info (EERE)

Front-end utility rate updates Front-end utility rate updates Home > Groups > Utility Rate Rmckeel's picture Submitted by Rmckeel(297) Contributor 13 February, 2013 - 14:28 Utility Rates A few utility rate updates worth noting. We used to have a limit of 100 for results returned on the utility gateway. That has been increased, along with a few UI updates. There is now a 15em height window (sorry if that's too technical) to browse results, so all the hundreds of results don't extend the page. For the naming page however, perhaps the long list is preferred? I'm willing to tweak these heights, as well as have separate heights if it is requested for the public view and the editor view. Improvement to have results show within the block instead of outside of. Minor increase in results width on editor page.

116

Tracking thermal fronts with temperature-sensitive, chemically reactive tracers  

DOE Green Energy (OSTI)

Los Alamos is developing tracer techniques using reactive chemicals to track thermal fronts in fractured geothermal reservoirs. If a nonadsorbing tracer flowing from the injection to production well chemically reacts, its reaction rate will be a strong function of temperature. Thus the extent of chemical reaction will be greatest early in the lifetime of the system, and less as the thermal front progresses from the injection to production well. Early laboratory experiments identified tracers with chemical kinetics suitable for reservoirs in the temperature range of 75 to 100/sup 0/C. Recent kinetics studies have focused on the kinetics of hydrolysis of derivatives of bromobenzene. This class of reactions can be used in reservoirs ranging in temperature from 150 to 275/sup 0/C, which is of greater interest to the geothermal industry. Future studies will include laboratory adsorption experiments to identify possibly unwanted adsorption on granite, development of sensitive analytical techniques, and a field demonstration of the reactive tracer concept.

Robinson, B.A.; Birdsell, S.A.

1987-01-01T23:59:59.000Z

117

Laser supported solid state absorption fronts in silica  

SciTech Connect

We develop a model based on simulation and experiment that explains the behavior of solid-state laser-supported absorption fronts generated in fused silica during high intensity (up to 5GW/cm{sup 2}) laser exposure. We find that the absorption front velocity is constant in time and is nearly linear in laser intensity. Further, this model can explain the dependence of laser damage site size on these parameters. This behavior is driven principally by the temperature-activated deep sub band-gap optical absorptivity, free electron transport and thermal diffusion in defect-free silica for temperatures up to 15,000K and pressures < 15GPa. The regime of parameter space critical to this problem spans and extends that measured by other means. It serves as a platform for understanding general laser-matter interactions in dielectrics under a variety of conditions.

Carr, C W; Bude, J D

2010-02-09T23:59:59.000Z

118

A turnstile mechanism for fronts propagating in fluid flows  

E-Print Network (OSTI)

We consider the propagation of fronts in a periodically driven flowing medium. It is shown that the progress of fronts in these systems may be mediated by a turnstile mechanism akin to that found in chaotic advection. We first define the modified ("active") turnstile lobes according to the evolution of point sources across a transport boundary. We then show that the lobe boundaries may be constructed from stable and unstable \\emph{burning invariant manifolds}---one-way barriers to front propagation analogous to traditional invariant manifolds for passive advection. Because the burning invariant manifolds (BIMs) are one-dimensional curves in a three-dimensional ($xy\\theta$) phase space, their projection into $xy$-space exhibits several key differences from their advective counterparts: (lobe) areas are not preserved, BIMs may self-intersect, and an intersection between stable and unstable BIMs does not map to another such intersection. These differences must be accommodated in the correct construction of the new turnstile. As an application, we consider a lobe-based treatment protocol for protecting an ocean bay from an invading algae bloom.

John R. Mahoney; Kevin A. Mitchell

2013-05-22T23:59:59.000Z

119

GASLESS COMBUSTION FRONTS WITH HEAT LOSS ANNA GHAZARYAN, STEPHEN SCHECTER, AND PETER L. SIMON  

E-Print Network (OSTI)

GASLESS COMBUSTION FRONTS WITH HEAT LOSS ANNA GHAZARYAN, STEPHEN SCHECTER, AND PETER L. SIMON Abstract. For a model of gasless combustion with heat loss, we use geometric singular perturbation theory to show existence of traveling combustion fronts. We show that the fronts are nonlinearly stable

Schecter, Stephen

120

Towards front-tracking based on conservation in two space dimensions III, tracking interfaces  

Science Conference Proceedings (OSTI)

This is the third paper in the series of our conservative front-tracking method. In this paper, we describe how our method tracks fluid interfaces in multi-fluid flows. Two important ingredients in our conservative front-tracking method in tracking fluid ... Keywords: Conservative front-tracking, Fluid interface, Numerical surface dissipation, Velocity and pressure equilibrium

Mohammed Aman Ullah, Wenbin Gao, De-Kang Mao

2013-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "horsepower change front" 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

Analysis of a Surface Front during the Early Summer Rainy Season over Taiwan  

Science Conference Proceedings (OSTI)

A case study of a relatively dry front during TAMEX IOP-4 is presented. At 0000 UTC 27 May, the broad cloud band extended from the China plain and southern Japan to east of 150°E, along and north of the surface front. This front possessed ...

Yi-Leng Chen; Yu-Xia Zhang; Norman B-F. Hui

1989-05-01T23:59:59.000Z

122

Occluded Fronts and the Occlusion Process: A Fresh Look at Conventional Wisdom  

Science Conference Proceedings (OSTI)

Traditionally, the formation of an occluded front during the occlusion process in extratropical cyclones has been viewed as the catch-up of a faster-moving cold front to a slower-moving warm front separating the warm-sector air from the low center, as ...

David M. Schultz; Geraint Vaughan

2011-04-01T23:59:59.000Z

123

Effects of curvature and compressibility on the stability of thermal fronts  

Science Conference Proceedings (OSTI)

The stability of subsonic thermal fronts against corrugation is analyzed and an exact dispersion relation is obtained taking into account the effects of the curvature of the distorted front as well as the compressibility of the gas. At a certain value of the Mach number ahead of the thermal front, unstable rates show a maximum; these rates drop to zero when a Chapman-Jouguet regime is established behind heat fronts. It is shown that curvature effects tend to stabilize conductive heat fronts propagating in a compressible gas.

Ibanez S, Miguel H.; Bessega L, Maria C.; Shchekinov, Yuri [Centro de Fisica Fundamental, Facultad de Ciencias, Universidad de los Andes, Apartado 26, Ipostel, La Hechicera, Merida (Venezuela); Centro de Fisica Teorica y Computacional, Escuela de Fisica, Facultad de Ciencias, Universidad Central de Venezuela, Caracas (Venezuela); Department of Physics, University of Rostov, Rostov on Don, 34409 (Russian Federation)

2006-06-15T23:59:59.000Z

124

Instrument Front-Ends at Fermilab During Run II  

SciTech Connect

The optimization of an accelerator relies on the ability to monitor the behavior of the beam in an intelligent and timely fashion. The use of processor-driven front-ends allowed for the deployment of smart systems in the field for improved data collection and analysis during Run II. This paper describes the implementation of the two main systems used: National Instruments LabVIEW running on PCs, and WindRiver's VxWorks real-time operating system running in a VME crate processor.

Meyer, Thomas; Slimmer, David; Voy, Duane; /Fermilab

2011-07-13T23:59:59.000Z

125

Protective coatings for front surface reflectors. Phase I, final report  

DOE Green Energy (OSTI)

Silicone resins were evaluated as protective coatings for front surface aluminum and silver reflectors. The solar weighted hemispherical reflectances and specular reflectances of float glass squares metallized with silver and aluminum and protected with silicone coatings were measured. The float glass squares metallized with silver and aluminum were highly reflective. The total reflectances of the silver samples were 5 to 7% higher than the aluminized samples. The resin coated aluminum samples were much more specular than the silver samples. Coupling agents used to improve the adhesion of the protective silicone resin coating to the silver surface adversely affected the specularities.

Dennis, W.E.

1979-09-01T23:59:59.000Z

126

Multilayer coatings for the EUVL front-end test bed  

SciTech Connect

Good illumination uniformity at the mask and wafer planes, and high wafer thoroughput in the EUVL front-end test bed facility at LLNL require graded period multilayer (ML) coatings on several of the optics. The ML deposition was accomplished using a newly developed deposition technique which avoids the use of {open_quotes}uniformity masks{close_quotes} to define the spatial dependence of the ML period variation. The capabilities of the process in providing the specified ML coatings are discussed for both EUVL condenser and imaging systems.

Vernon, S.P.; Carey, M.J.; Gaines, D.P.; Weber, F.J.

1995-01-19T23:59:59.000Z

127

Energy Loss at Propagating Jamming Fronts in Granular Gas Clusters  

E-Print Network (OSTI)

We explore the initial moments of impact between two dense granular clusters in a two-dimensional geometry. The particles are composed of solid CO$_{2}$ and are levitated on a hot surface. Upon collision, the propagation of a dynamic "jamming front" produces a distinct regime for energy dissipation in a granular gas in which the translational kinetic energy decreases by over 90%. Experiments and associated simulations show that the initial loss of kinetic energy obeys a power law in time, $\\Delta E=-Kt^{3/2}$, a form that can be predicted from kinetic arguments.

Justin C. Burton; Peter Y. Lu; Sidney R. Nagel

2013-06-12T23:59:59.000Z

128

Light-Front Holography and QCD Hadronization at the Amplitude Level  

E-Print Network (OSTI)

Light-front holography allows hadronic amplitudes in the AdS/QCD fifth dimension to be mapped to frame-independent light-front wavefunctions of hadrons in physical space-time, thus providing a relativistic description of hadrons at the amplitude level. The AdS coordinate z is identified with an invariant light-front coordinate zeta which separates the dynamics of quark and gluon binding from the kinematics of constituent spin and internal orbital angular momentum. The result is a single-variable light-front Schrodinger equation for QCD which determines the eigenspectrum and the light-front wavefunctions of hadrons for general spin and orbital angular momentum. A new method for computing the hadronization of quark and gluon jets at the amplitude level using AdS/QCD light-front wavefunctions is outlined.

Stanley J. Brodsky; Guy de Teramond

2009-01-07T23:59:59.000Z

129

Evolutionary algorithm for the neutrino factory front end design  

Science Conference Proceedings (OSTI)

The Neutrino Factory is an important tool in the long-term neutrino physics program. Substantial effort is put internationally into designing this facility in order to achieve desired performance within the allotted budget. This accelerator is a secondary beam machine: neutrinos are produced by means of the decay of muons. Muons, in turn, are produced by the decay of pions, produced by hitting the target by a beam of accelerated protons suitable for acceleration. Due to the physics of this process, extra conditioning of the pion beam coming from the target is needed in order to effectively perform subsequent acceleration. The subsystem of the Neutrino Factory that performs this conditioning is called Front End, its main performance characteristic is the number of the produced muons.

Poklonskiy, Alexey A.; /Michigan State U.; Neuffer, David; /Fermilab

2009-01-01T23:59:59.000Z

130

Development/Demonstration of an Advanced Oxy-Fuel Front-End System  

SciTech Connect

Owens Corning and other glass manufacturers have used oxy-fuel combustion technology successfully in furnaces to reduce emissions, increase throughput, reduce fuel consumption and, depending on the costs of oxygen and fuel, reduce energy costs. The front end of a fiberglass furnace is the refractory channel system that delivers glass from the melter to the forming process. After the melter, it is the second largest user of energy in a fiberglass plant. A consortium of glass companies and suppliers, led by Owens Corning, was formed to develop and demonstrate oxy/fuel combustion technology for the front end of a fiberglass melter, to demonstrate the viability of this energy saving technology to the U.S. glass industry, as a D.O.E. sponsored project. The project goals were to reduce natural gas consumption and CO2 green house gas emissions by 65 to 70% and create net cost savings after the purchase of oxygen to achieve a project payback of less than 2 years. Project results in Jackson, TN included achieving a 56% reduction in gas consumption and CO2 emissions. A subsequent installation in Guelph ON, not impacted by unrelated operational changes in Jackson, achieved a 64% reduction. Using the more accurate 64% reduction in the payback calculation yielded a 2.2 year payback in Jackson. The installation of the demonstration combustion system saves 77,000 DT/yr of natural gas or 77 trillion Btu/yr and eliminates 4500 tons/yr of CO2 emissions. This combustion system is one of several energy and green house gas reduction technologies being adopted by Owens Corning to achieve aggressive goals relating to the company’s global facility environmental footprint.

Mighton, Steven, J.

2007-08-06T23:59:59.000Z

131

Commissioning of the SNS front-end systems at Berkeley Lab  

E-Print Network (OSTI)

COMMISSIONING OF THE SNS FRONT-END SYSTEMS AT BERKELEY LAB*Details of other MEBT commissioning efforts, especiallywere provided by LANL. Commissioning topics included beam

2002-01-01T23:59:59.000Z

132

Front Row (left to right): Bryan Reed, Wayne King, Nigel Browning ...  

DTEM – Team Members: Front Row (left to right): Bryan Reed, Wayne King, Nigel Browning, Judy Kim, Michael Armstrong Back Row (left to right): Thomas LaGrange ...

133

Factors controlling streambed coverage of Didymosphenia geminata in two regulated streams in the Colorado Front Range  

E-Print Network (OSTI)

of dissolved substances from a Colorado mountain watershed.11: CDOT, 2009. Colorado Department of Transportation.two regulated streams in the Colorado Front Range Matthew P.

Miller, Matthew P.; McKnight, Diane M.; Cullis, James D.; Greene, Alicia; Vietti, Kristin; Liptzin, Daniel

2009-01-01T23:59:59.000Z

134

Recursion relations and scattering amplitudes in the light-front formalism  

E-Print Network (OSTI)

The fragmentation functions and scattering amplitudes are investigated in the framework of light-front perturbation theory. It is demonstrated that, the factorization property of the fragmentation functions implies the recursion relations for the off-shell scattering amplitudes which are light-front analogs of the Berends-Giele relations. These recursion relations on the light-front can be solved exactly by induction and it is shown that the expressions for the off-shell light-front amplitudes are represented as a linear combinations of the on-shell amplitudes. By putting external particles on-shell we recover the scattering amplitudes previously derived in the literature.

Christian A. Cruz-Santiago; Anna M. Stasto

2013-08-05T23:59:59.000Z

135

The Interruption of Alpine Foehn by a Cold Front. Part I: Observations  

E-Print Network (OSTI)

in Inn and Wipp Valley Temperature slope profile Doppler wind lidar in Wipp Valley #12;6 of 13 Case study study Wipp Valley: AWS network Pot. Temp. and Wind ­ Hovmoeller diagram Strong and warm foehn in the lower Wipp Valley Western Inn-Valley gust front enters Wipp Valley Cold front propagates southward

Gohm, Alexander

136

Trapping of a Coastal Density Front by the Bottom Boundary Layer  

Science Conference Proceedings (OSTI)

The dynamics of a surface-to-bottom density front on a uniformly sloping continental shelf and the role of density advection in the bottom boundary layer are examined using a three-dimensional, primitive equation numerical model. The front is ...

David C. Chapman; Steven J. Lentz

1994-07-01T23:59:59.000Z

137

Fronts Formed by Obliquely Reflecting Internal Waves at a Sloping Boundary  

Science Conference Proceedings (OSTI)

A characteristic of internal waves reflecting from sloping boundaries is that they form fronts that travel with the component of the phase speed of the waves up the boundary. The strength of the fronts is assessed by estimating the magnitude of ...

S. A. Thorpe

1999-09-01T23:59:59.000Z

138

Large-Scale Response of the Pacific Ocean Subarctic Front to Momentum Transfer: A Numerical Study  

Science Conference Proceedings (OSTI)

A numerical four-layer hydrodynamical model is implemented to investigate the role the atmosphere exerts on the dynamics of the subarctic front. While the effect of the westerly winds causes a southward shift of the front, the effect of a ...

Alejandro Camerlengo

1982-10-01T23:59:59.000Z

139

PHYSICS RESULTS OF THE NSLS-II LINAC FRONT END TEST STAND  

Science Conference Proceedings (OSTI)

The Linac Front End Test Stand (LFETS) was installed at the Source Development Laboratory (SDL) in the fall of 2011 in order to test the Linac Front End. The goal of these tests was to test the electron source against the specifications of the linac. In this report, we discuss the results of these measurements and the effect on linac performance.

Fliller R. P.; Gao, F.; Yang, X.; Rose, J.; Shaftan, T.; Piel, C

2012-05-20T23:59:59.000Z

140

Discrete Event Front-tracking Simulation of a Physical Fire-spread Model  

Science Conference Proceedings (OSTI)

Simulation of moving interfaces such as a fire front usually requires resolution of a large-scale and detailed domain. Such computing involves the use of supercomputers to process the large amount of data and calculations. This limitation is mainly due ... Keywords: DEVS, asynchronous, discrete events, envelope, fire spread, flame, forest, front tracking, interface, simulation

Jean-Baptiste Filippi; Frédéric Morandini; Jacques Henri Balbi; David Rc Hill

2010-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "horsepower change front" 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

Two Types of Surface Wind Response to the East China Sea Kuroshio Front  

Science Conference Proceedings (OSTI)

Effects of the sea surface temperature (SST) front along the East China Sea Kuroshio on sea surface winds at different time scales are investigated. In winter and spring, the climatological vector wind is strongest right on the SST front while the ...

Jing-Wu Liu; Su-Ping Zhang; Shang-Ping Xie

142

Electrical double layers at shock fronts in glow discharges and afterglows  

Science Conference Proceedings (OSTI)

This paper examines the propagation of spark-generated shockwaves (1.0front in these weakly-ionized, nonmagnetized, collisional plasmas. We used a microwave hairpin resonator to measure the electron number density, and, for all cases, we measured an increase in the electron number density at the shock front. By comparing the increase in electron number density at the shock front in the active discharge and in the afterglow, we conclude that electrons with a temperature much greater than room temperature can be compressed at the shock front. The ratio of electron number density before and after the shock front can be approximately predicted using the Rankine-Hugoniot relationship. The large gradient in electron density, and hence a large gradient in the flux of charged species, created a region of space-charge separation, i.e., a double layer, at the shock front. The double layer balances the flux of charged particles on both sides of the shock front. The double layer voltage drop was measured in the current-carrying discharge using floating probes and compared with previous models. As well, we measured argon 1s{sup 5} metastable-state density and demonstrate that metastable-state neutral species can be compressed across a shock front and approximately predicted using the Rankine-Hugoniot relationship.

Siefert, Nicholas S. [Air Force Research Laboratory, Wright Patterson, Ohio 45433 (United States)

2010-12-15T23:59:59.000Z

143

Finescale Vertical Structure of a Cold Front as Revealed by an Airborne Doppler Radar  

Science Conference Proceedings (OSTI)

In the afternoon of 24 May 2002, a well-defined and frontogenetic cold front moved through the Texas panhandle. Detailed observations from a series of platforms were collected near the triple point between this cold front and a dryline boundary.

Bart Geerts; Rick Damiani; Samuel Haimov

2006-01-01T23:59:59.000Z

144

Higher-order differencing for phase-front propagation in geothermal systems  

DOE Green Energy (OSTI)

We are testing higher-order differencing total variation diminishing schemes implemented in the reservoir simulator TOUGH2 to reduce numerical dispersion of phase fronts in geothermal flow problems. The schemes are called total variation diminishing because they employ flux limiters to prevent spurious oscillations that sometimes occur with other higher-order differencing schemes near sharp fronts. Thus it appears that total variation diminishing schemes rely on an implicit assumption that the overall variability of advected quantities stays constant or diminishes with time. We use the Leonard total variation diminishing scheme in two special problems designed to test the applicability of the scheme for cases where this implicit assumption is violated. In the first problem, we investigate the isothermal propagation of a phase front in a composite porous medium where phase saturation increases as the front enters the second medium. In the second problem, we investigate the propagation of a phase front where boiling increases the saturation difference across the front as it propagates. In the composite porous medium problem, we find that spurious phase saturations can arise if the weighting scheme is based on relative permeability; for weighting based on phase saturation, no such oscillation arises. In the boiling front propagation problem, the front position is highly sensitive to weighting scheme, and the Leonard total variation diminishing scheme is more accurate than upstream weighting because it decreases numerical dispersion in the thermal energy equation.

Oldenburg, Curtis; Pruess, Karsten

1998-01-09T23:59:59.000Z

145

Upper-Level Frontogenesis: Two Case Studies from the FRONTS 87 Experiment  

Science Conference Proceedings (OSTI)

This study describes the structure of two cold fronts observed during the European experiment FRONTS 87. The selection of these two particular cases is based on the existence of well-marked upper-level features, such as strong jet streams, upper-...

Konstantinos Lagouvardos; Vassiliki Kotroni

1995-04-01T23:59:59.000Z

146

Mineral paragenesis and textures associated with sandstone-hosted roll-front uranium deposits, NW China  

E-Print Network (OSTI)

Mineral paragenesis and textures associated with sandstone-hosted roll-front uranium deposits, NW, People's Republic of China c Northwest Institute of Uranium Geology, China National Nuclear Corporation, Wuyiyi and Shihongtan sandstone-hosted roll-front uranium deposits, northwest China. The mineralization

Fayek, Mostafa

147

Evidence of uranium biomineralization in sandstone-hosted roll-front uranium deposits, northwestern China  

E-Print Network (OSTI)

Evidence of uranium biomineralization in sandstone-hosted roll-front uranium deposits, northwestern Available online 25 January 2005 Abstract We show evidence that the primary uranium minerals, uraninite-front uranium deposits, Xinjiang, northwestern China were biogenically precipitated and psuedomorphically

Fayek, Mostafa

148

Real-Time Detection of Split Fronts Using Mesoscale Models and WSR-88D Radar Products  

Science Conference Proceedings (OSTI)

A structured methodology for detecting the presence of split cold fronts in an operational forecast environment is developed and applied to a case in which a split front passed over a region of cold air damming in the southeastern United States. ...

Steven E. Koch

2001-02-01T23:59:59.000Z

149

Silicon Solar Cells with Front Hetero-contact and Aluminum Alloy Back Junction (Poster)  

DOE Green Energy (OSTI)

The objectives of this report are: (1) to apply industrial back Al process in efficient n-wafer cells with a-Si:H front surface passivation; and (2) to evaluate the surface recombination velocity (SRV) of the a-Si:H passivated front surface with different surface preparation procedures.

Yuan, H.-C.; Page, M. R.; Iwaniczko, E.; Xu, Y.; Roybal, L.; Wang, Q.; Branz, H. M.; Meier, D. L.

2008-05-01T23:59:59.000Z

150

A front-tracking method for computation of interfacial flows with soluble surfactants  

Science Conference Proceedings (OSTI)

A finite-difference/front-tracking method is developed for computations of interfacial flows with soluble surfactants. The method is designed to solve the evolution equations of the interfacial and bulk surfactant concentrations together with the incompressible ... Keywords: Buoyancy-driven flow, Drop cleavage, Front-tracking method, Soluble surfactant

Metin Muradoglu; Gretar Tryggvason

2008-02-01T23:59:59.000Z

151

A Simple Model of the Formation and Maintenance of the Shelf/Slope Front in the Middle Atlantic Bight  

Science Conference Proceedings (OSTI)

The strong salinity and temperature gradients across the shelf/slope front in the Middle Atlantic Bight often compensate such that the cross-front density gradient is nearly eliminated. The suggests that the density field may not be as ...

David C. Chapman

1986-07-01T23:59:59.000Z

152

Observations of the Sea-Breeze Front during CaPE. Part II: Dual-Doppler and Aircraft Analysis  

Science Conference Proceedings (OSTI)

The three-dimensional kinematic structures of offshore and onshore flow sea-breeze fronts observed during the CaPE experiment are shown using high resolution dual-Doppler and aircraft data. The fronts interact with horizontal convective rolls (...

Nolan T. Atkins; Roger M. Wakimoto; Tammy M. Weckwerth

1995-04-01T23:59:59.000Z

153

SiGe receiver front ends and flip-chip integrated wideband antennas for millimeter-wave passive imaging  

E-Print Network (OSTI)

SiGe wideband 77-GHz and 94-GHz front end receivers with integrated antennas for passive imaging have been designed and characterized. These front end systems exhibit wideband performance with the highest gain and lowest ...

Powell, Johnna, 1980-

2009-01-01T23:59:59.000Z

154

Microscopic Examination of a Corrosion Front in Spent Nuclear Fuel  

Science Conference Proceedings (OSTI)

Spent uranium oxide nuclear fuel hosts a variety of trace chemical constituents, many of which must be sequestered from the biosphere during fuel storage and disposal. In this paper we present synchrotron x-ray absorption spectroscopy and microscopy findings that illuminate the resultant local chemistry of neptunium and plutonium within spent uranium oxide nuclear fuel before and after corrosive alteration in an air-saturated aqueous environment. We find the plutonium and neptunium in unaltered spent fuel to have a +4 oxidation state and an environment consistent with solid-solution in the UO{sub 2} matrix. During corrosion in an air-saturated aqueous environment, the uranium matrix is converted to uranyl U(VI)O{sub 2}{sup 2+} mineral assemblage that is depleted in plutonium and neptunium relative to the parent fuel. At the corrosion front interface between intact fuel and the uranyl-mineral corrosion layer, we find evidence of a thin ({approx}20 micrometer) layer that is enriched in plutonium and neptunium within a predominantly U{sup 4+} environment. Available data for the standard reduction potentials for NpO{sup 2+}/Np{sup 4+} and UO{sub 2}{sup 2+}/U{sup 4+} couples indicate that Np(IV) may not be effectively oxidized to Np(V) at the corrosion potentials of uranium dioxide spent nuclear fuel in air-saturated aqueous solutions. Neptunium is an important radionuclide in dose contribution according to performance assessment models of the proposed U. S. repository at Yucca Mountain, Nevada. A scientific understanding of how the UO{sub 2} matrix of spent nuclear fuel impacts the oxidative dissolution and reductive precipitation of neptunium is needed to predict its behavior at the fuel surface during aqueous corrosion. Neptunium would most likely be transported as aqueous Np(V) species, but for this to occur it must first be oxidized from the Np(IV) state found within the parent spent nuclear fuel [1]. In the immediate vicinity of the spent fuel's surface the redox and nucleation behavior is likely to promote/enhance nucleation of NpO{sub 2} and Np{sub 2}O{sub 5}. Alternatively, Np may be incorporated into uranyl (UO{sub 2}{sup 2+}) alteration phases [2]. In some cases, less-soluble elements such as plutonium will be enriched near the surface of the corroding fuel [3]. We have used focused synchrotron x-rays from the MRCAT beam line at the Advanced Photon Source (APS) at Argonne National Lab to examine a specimen of spent nuclear fuel that had been subject to 10 years of corrosion testing in an environment of humid air and dripping groundwater at 90 C [4]. We find evidence of a region, approximately 20 microns in thickness, enriched in plutonium and neptunium at the corrosion front that exists between the uranyl silicate alteration mineral rind and the unaltered uranium oxide fuel (Figures 1 and 2). The uranyl silicate is itself found to be depleted in these transuranic elements relative to their abundance relative to uranium in the parent fuel. This suggests a low mobility of these components owing to a resistance to oxidize further in the presence of a UO{sub 2}{sup 2+}/U{sup 4+} couple [5].

J.A> Fortner; A.J. Kropf; R.J. Finch; J.C. Cunnane

2006-06-20T23:59:59.000Z

155

Magnetohydrodynamic Simulations of the Formation of Cold Fronts in Clusters of Galaxies including Heat Conduction  

E-Print Network (OSTI)

Recent Chandra observations of clusters of galaxies revealed the existence of a sharp ridge in the X-ray surface brightness where the temperature drops across the front. This front is called the cold front. We present the results of two-dimensional magnetohydrodynamic simulations of the time evolution of a dense subcluster plasma moving in a cluster of galaxies. Anisotropic heat conduction along the magnetic field lines is included. In the models without magnetic fields, the numerical results indicate that the heat conduction from the hot ambient plasma heats the cold dense plasma of the subcluster and diffuses out the cold front. When magnetic fields exist in a cluster of galaxies, however, cold fronts can be maintained because the heat conduction across the magnetic field lines is suppressed. We found that, even when the magnetic fields in a cluster of galaxies are disordered, heat conduction across the front is restricted because the magnetic field lines are stretched along the front. Numerical results reproduced the X-ray intensity distribution observed in the A3667 cluster of galaxies.

Naoki Asai; Naoya Fukuda; Ryoji Matsumoto

2004-04-07T23:59:59.000Z

156

Light-Front Holography, AdS/QCD, and Hadronic Phenomena  

E-Print Network (OSTI)

AdS/QCD, the correspondence between theories in a modified five-dimensional anti-de Sitter space and confining field theories in physical space-time, provides a remarkable semiclassical model for hadron physics. Light-front holography allows hadronic amplitudes in the AdS fifth dimension to be mapped to frame-independent light-front wavefunctions of hadrons in physical space-time, thus providing a relativistic description of hadrons at the amplitude level. We identify the AdS coordinate $z$ with an invariant light-front coordinate $\\zeta$ which separates the dynamics of quark and gluon binding from the kinematics of constituent spin and internal orbital angular momentum. The result is a single-variable light-front Schr\\"odinger equation with a confining potential which determines the eigenspectrum and the light-front wavefunctions of hadrons for general spin and orbital angular momentum. The mapping of electromagnetic and gravitational form factors in AdS space to their corresponding expressions in light-front theory confirms this correspondence. Some novel features of QCD are discussed, including the consequences of confinement for quark and gluon condensates. The distinction between static structure functions, such as the probability distributions computed from the square of the light-front wavefunctions, versus dynamical structure functions which include the effects of rescattering, is emphasized. A new method for computing the hadronization of quark and gluon jets at the amplitude level, an event amplitude generator, is outlined.

Stanley J. Brodsky; Guy F. de Teramond

2009-09-22T23:59:59.000Z

157

Front Vehicle Setup Information Downloadable Dynamometer Database (D  

NLE Websites -- All DOE Office Websites (Extended Search)

Chevrolet Volt- 20F Chevrolet Volt- 20F Test cell location Front Vehicle Setup Information Downloadable Dynamometer Database (D 3 )- Test Summary Sheet Vehicle architecture EREV Vehicle dynamometer Input Document date 8/7/2013 Advanced Powertrain Research Facility Test weight [lb] Target A [lb] 4000 28.66 Target B [lb/mph] Target C [lb/mph^2] -0.0132 0.0202 Revision Number 3 Notes: Test Fuel Information Fuel type EPA Tier II EEE Fuel density [g/ml] Fuel Net HV [BTU/lbm] 0.743 18490 T e s t I D [ # ] C y c l e C o l d s t a r t ( C S t ) H o t s t a r t [ H S t ] D a t e T e s t C e l l T e m p [ C ] T e s t C e l l R H [ % ] T e s t C e l l B a r o [ i n / H g ] V e h i c l e c o o l i n g f a n s p e e d : S p e e d M a t c h [ S M ] o r c o n s t a n t s p e e d [ C S ] S o l a r L a m p s [ W / m 2 ] V e i c l e C l i m a t e C o n t r o l s e t t i n g s H o o d P o s i t i o n [ U p ] o r [ C l o s e d ] W i n d o w P o s i t i o n [ C l o s e d ] o r [ D o w n ] C y c l e D i s t a n c e [ m i ] C y c l e F u

158

Propagation of Front Waves in Myelinated Nerve Fibres: New Electrical Transmission Lines Constituted of Linear and Nonlinear Portions  

Science Conference Proceedings (OSTI)

In this paper, the authors examine the propagation of wave fronts in myelinated nerve fibres and applications as electrical transmission lines constituted of linear and nonlinear portions. Numerical simulations show that the front introduced in the nonlinear ... Keywords: Demyelination, Electrical Line, Front Wave, Myelinated Fibre, Regenerative, Remyelination

Aïssatou Mboussi Nkomidio; Paul Woafo

2011-01-01T23:59:59.000Z

159

DOE Offers Conditional Loan Guarantee for Front End Nuclear Facility in  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DOE Offers Conditional Loan Guarantee for Front End Nuclear DOE Offers Conditional Loan Guarantee for Front End Nuclear Facility in Idaho DOE Offers Conditional Loan Guarantee for Front End Nuclear Facility in Idaho May 20, 2010 - 12:00am Addthis Washington, DC - As part of a broad effort to expand the use of nuclear power in the United States and reduce carbon pollution, U.S. Secretary of Energy Steven Chu announced today the Department's first conditional commitment for a front-end nuclear facility. The $2 billion loan guarantee will support AREVA's Eagle Rock Enrichment Facility near Idaho Falls, Idaho, which will supply uranium enrichment services for the U.S. nuclear power industry. "Increasing uranium enrichment in the United States is critical to the nation's energy and national security," said Secretary Chu. "Existing

160

DOE Offers Conditional Loan Guarantee for Front End Nuclear Facility in  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DOE Offers Conditional Loan Guarantee for Front End Nuclear DOE Offers Conditional Loan Guarantee for Front End Nuclear Facility in Idaho DOE Offers Conditional Loan Guarantee for Front End Nuclear Facility in Idaho May 20, 2010 - 12:00am Addthis Washington, DC - As part of a broad effort to expand the use of nuclear power in the United States and reduce carbon pollution, U.S. Secretary of Energy Steven Chu announced today the Department's first conditional commitment for a front-end nuclear facility. The $2 billion loan guarantee will support AREVA's Eagle Rock Enrichment Facility near Idaho Falls, Idaho, which will supply uranium enrichment services for the U.S. nuclear power industry. "Increasing uranium enrichment in the United States is critical to the nation's energy and national security," said Secretary Chu. "Existing

Note: This page contains sample records for the topic "horsepower change front" 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

Midtropospheric Anticyclonic Vortex Street Associated with a Cloud Band near a Cold Front  

Science Conference Proceedings (OSTI)

The characteristics and formation mechanism of an anticyclonic vortex street of meso-? scale, which appeared near a cold front around the Ryukyu Islands, Japan, on 11 April 1995, were examined by an analysis of observational data, a numerical ...

Eizi Toyoda; Hiroshi Niino; Kazuhisa Tsuboki; Ryuji Kimura; Masanori Yoshizaki

1999-08-01T23:59:59.000Z

162

The Role of Stratification in the Formation and Maintenance of Shelf-Break Fronts  

Science Conference Proceedings (OSTI)

A mechanism is described for the formation or a front at the edge of a continental shelf in an initially linearly stratified fluid lacking horizontal density gradients. A primitive equation numerical model is used with a specified vertically ...

Glen Gawarkiewicz; David C. Chapman

1992-07-01T23:59:59.000Z

163

Occurrence and Structure of Mesoscale Fronts and Cyclones near Icy Bay, Alaska  

Science Conference Proceedings (OSTI)

When synoptic-scale cyclones stagnate against the mountains of southeast Alaska, a trough extends to the northwest, along the southern Alaskan coast. A front between maritime and continental air masses develops along the coast. During early ...

Michael Reynolds

1983-10-01T23:59:59.000Z

164

Boundary Layer Control of Buoyant Coastal Currents and the Establishment of a Shelfbreak Front  

Science Conference Proceedings (OSTI)

The bottom boundary layer exerts a powerful control over buoyant coastal currents that contact the bottom, providing a mechanism for trapping density fronts along isobaths. Recent observations suggest that this mechanism may play a role in ...

David C. Chapman

2000-11-01T23:59:59.000Z

165

Examination of the Mesoscale Features of the GALE Coastal Front of 24-25 January 1986  

Science Conference Proceedings (OSTI)

The early evolution of a coastal front that formed off the southeast coast of the United States on 24 January 1986 is examined. Satellite and radar imagery together with the intensive surface, upper0air, and aircraft observations available during ...

Allen J. Riordan

1990-02-01T23:59:59.000Z

166

Analysis and Diagnosis of the Composition of Ageostrophic Circulations in Jet-Front Systems  

Science Conference Proceedings (OSTI)

Diagnostic case studies of ageostrophic circulations in upper-tropospheric jet-front systems are presented, using the numerical analyses of the ECMWF model as data sources. The impact of the ECMWF analysis procedure on the retrieved ageostrophic ...

Jean-Pierre Cammas; Daniel Ramond

1989-11-01T23:59:59.000Z

167

Downwelling-Front Instability and Eddy Formation in the Eastern Mediterranean  

Science Conference Proceedings (OSTI)

The instability of the downwelling front along the southern coast of Asia Minor is studied with a multimode quasigeostrophic model. Linear analysis shows that the most unstable wave has a length of about 100 km, The wavelength depends only very ...

Yizhak Feliks; Michael Ghil

1993-01-01T23:59:59.000Z

168

What Maintains the SST Front North of the Eastern Pacific Equatorial Cold Tongue?  

Science Conference Proceedings (OSTI)

A coupled ocean–atmosphere regional model suggests a mechanism for formation of a sharp sea surface temperature (SST) front north of the equator in the eastern Pacific Ocean in boreal summer and fall. Meridional convergence of Ekman transport at ...

Simon P. de Szoeke; Shang-Ping Xie; Toru Miyama; Kelvin J. Richards; R. Justin O. Small

2007-06-01T23:59:59.000Z

169

Forecasting the Impacts of Strong Wintertime Post-Cold Front Winds in the Northern Plains  

Science Conference Proceedings (OSTI)

Strong post-cold front wind events in the northern plains of the United States are a difficult problem for operational forecasters. The various atmospheric ingredients that lead to these events are examined from an operational point of view. ...

Anton F. Kapela; Preston W. Leftwich; Richard Van Ess

1995-06-01T23:59:59.000Z

170

Sensitivity of Mesoscale Gravity Waves to the Baroclinicity of Jet-Front Systems  

Science Conference Proceedings (OSTI)

This study investigates the sensitivity of mesoscale gravity waves to the baroclinicity of the background jet-front systems by simulating different life cycles of baroclinic waves with a high-resolution mesoscale model. Four simulations are made ...

Shuguang Wang; Fuqing Zhang

2007-02-01T23:59:59.000Z

171

Ocean Fronts off California: A New Product from GOES Satellite Data  

E-Print Network (OSTI)

COASTAL OCEAN RESEARCH R/CZ-181: 3.1.2002–2.28.2005 Ocean Fronts off California: A Newsurfers who complain that the ocean is coldest in spring are

Breaker, Laurence

2004-01-01T23:59:59.000Z

172

Applications of AdS/QCD and Light-Front Holography to Baryon Physics  

SciTech Connect

The correspondence between theories in anti-de Sitter space and field theories in physical space-time leads to an analytic, semiclassical model for strongly-coupled QCD which has scale invariance at short distances and color confinement at large distances. These equations, for both mesons and baryons, give a very good representation of the observed hadronic spectrum, including a zero mass pion. Light-front holography allows hadronic amplitudes in the AdS fifth dimension to be mapped to frame-independent light-front wavefunctions of hadrons in physical space-time, thus providing a relativistic description of hadrons at the amplitude level. The meson and baryon wavefunctions derived from light-front holography and AdS/QCD also have remarkable phenomenological features, including predictions for the electromagnetic form factors and decay constants. The approach can be systematically improved using light-front Hamiltonian methods. Some novel features of QCD for baryon physics are also discussed.

Brodsky, Stanley J.; /SLAC; de Teramond, Guy F.; /Costa Rica U.

2011-08-22T23:59:59.000Z

173

Simulation of chemical reaction fronts in anaerobic digestion of solid waste  

Science Conference Proceedings (OSTI)

A case study for parallelisation of a code for a nonlinear system of evolution equations is presented. It describes the propagation of reaction fronts in anaerobic waste digestion. These occur as a consequence of heterogeneous initial distributions of ...

Hermann J. Eberl

2003-05-01T23:59:59.000Z

174

VHF Radar Observations of Gravity-Wave Production by Cold Fronts over Southern Australia  

Science Conference Proceedings (OSTI)

Four extended observational campaigns were conducted during August and November 1988 with an ST (stratosphere–troposphere) radar in southern Australia during the passage of cold fronts over the system, giving around 30 days of three-dimensional ...

Stephen D. Eckermann; Robert A. Vincent

1993-03-01T23:59:59.000Z

175

The Southerly Burster of South Eastern Australia: An Orographically Forced Cold Front  

Science Conference Proceedings (OSTI)

This paper presents an observational study of the “southerly burster”, or “southerly buster”, a particularly intense type of orographically and thermally influenced cold front which occurs in spring and summer along the southern coast of New ...

J. R. Colquhoun; D. J. Shepherd; C. E. Coulman; R. K. Smith; K. McInnes

1985-12-01T23:59:59.000Z

176

On the Movement and Low-Level Structure of Cold Fronts  

Science Conference Proceedings (OSTI)

This paper presents a review of theoretical and observational studies relating to the low-level structure of cold fronts and explores the factors that are pertinent to frontal motion.

Roger K. Smith; Michael J. Reeder

1988-10-01T23:59:59.000Z

177

Direct Observations of Along-Isopycnal Upwelling and Diapycnal Velocity at a Shelfbreak Front  

Science Conference Proceedings (OSTI)

By mapping the three-dimensional density field while simultaneously tracking a subsurface, isopycnal float, direct observations of upwelling along a shelfbreak front were made on the southern flank of Georges Bank. The thermohaline and bio-...

John A. Barth; Dave Hebert; Andrew C. Dale; David S. Ullman

2004-03-01T23:59:59.000Z

178

Location of the Antarctic Polar Front from AMSR-E Satellite Sea Surface Temperature Measurements  

Science Conference Proceedings (OSTI)

The location of the Southern Ocean polar front (PF) is mapped from the first 3 yr of remotely sensed Advanced Microwave Scanning Radiometer for the Earth Observing System (AMSR-E) sea surface temperature (SST) measurements. In agreement with ...

Shenfu Dong; Janet Sprintall; Sarah T. Gille

2006-11-01T23:59:59.000Z

179

Use of Synthetic Aperture Radar in Finescale Surface Analysis of Synoptic-Scale Fronts at Sea  

Science Conference Proceedings (OSTI)

The viability of synthetic aperture radar (SAR) as a tool for finescale marine meteorological surface analyses of synoptic-scale fronts is demonstrated. In particular, it is shown that SAR can reveal the presence of, and the mesoscale and ...

G. S. Young; T. N. Sikora; N. S. Winstead

2005-06-01T23:59:59.000Z

180

The Life Cycle of an Undular Bore and Its Interaction with a Shallow, Intense Cold Front  

Science Conference Proceedings (OSTI)

The evolution of an undular bore and its associated wind shift, spawned by the passage of a shallow surface cold front over the Southern Great Plains of the United States, is examined using surface and remote sensing observations along with ...

Daniel C. Hartung; Jason A. Otkin; Jonathan E. Martin; David D. Turner

2010-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "horsepower change front" 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

The Life Cycle of Thunderstorm Gust Fronts as Viewed with Doppler Radar and Rawinsonde Data  

Science Conference Proceedings (OSTI)

This paper presents the time-dependent analysis of the thunderstorm gust front with the use of Project NIMROD data. RHI cross sections of reflectivity and Doppler velocity are constructed to determine the entire vertical structure. The life cycle ...

Roger M. Wakimoto

1982-08-01T23:59:59.000Z

182

Observations of a Subtropical Cold Front in a Region of Complex Terrain  

Science Conference Proceedings (OSTI)

The passage of shallow cold fronts during the late spring and early summer months over the island of Taiwan is often accompanied by heavy rainfall and occasional flash flood episodes. Previous studies have emphasized the weak baroclinicity of ...

Stanley B. Trier; David B. Parsons; Thomas J. Matejka

1990-12-01T23:59:59.000Z

183

Identification of Atmospheric Fronts over the Ocean with Microwave Measurements of Water Vapor and Rain  

Science Conference Proceedings (OSTI)

This Paper describes some basic research techniques and algorithms developed to diagnose fronts in cyclonic storms over the ocean with data from satellite-borne microwave radiometers. The need for this research stems from the limited availability ...

Kristina B. Kanaros; Iffekhar Bhatti; Llynn A. Mcmurdie; Grant W. Petty

1989-12-01T23:59:59.000Z

184

Major Cloud Plumes in the Arctic and Their Relation to Fronts and Ice Movement  

Science Conference Proceedings (OSTI)

A study of the movement of orographic cloud plumes from one island to another in the Svalbard-Novaya Zemlya region of the Barents Sea revealed a close association with similar movements of arctic fronts. Strong northerly winds behind arctic ...

Robert W. Fett

1992-06-01T23:59:59.000Z

185

Influences of the Sierra Nevada on Intermountain Cold-Front Evolution  

Science Conference Proceedings (OSTI)

Recent studies indicate that strong cold fronts develop frequently downstream of the Sierra Nevada over the Intermountain West. To help ascertain why, this paper examines the influence of the Sierra Nevada on the rapidly developing Intermountain ...

Gregory L. West; W. James Steenburgh

2011-10-01T23:59:59.000Z

186

Kinematic and Moisture Characteristics of a Nonprecipitating Cold Front Observed during IHOP. Part II: Alongfront Structures  

Science Conference Proceedings (OSTI)

Kinematic and thermodynamic structures of a nonprecipitating cold front observed in west-central Kansas on 10 June 2002 during the International H2O Project (IHOP) are examined with dropsondes and airborne instrumentation that includes Doppler ...

Katja Friedrich; David E. Kingsmill; Cyrille Flamant; Hanne V. Murphey; Roger M. Wakimoto

2008-10-01T23:59:59.000Z

187

Numerical Study of Precipitation Core-Gap Structure along Cold Fronts  

Science Conference Proceedings (OSTI)

The mechanism responsible for the core-gap structure of precipitation along narrow cold-frontal rainbands (NCFRs) is investigated through analyses of idealized cloud-resolving simulations of cold fronts. The control simulation, in which the ...

Masayuki Kawashima

2007-07-01T23:59:59.000Z

188

Influence of the Subtropical Andes on Baroclinic Disturbances: A Cold Front Case Study  

Science Conference Proceedings (OSTI)

The Andes Cordillera produces a significant disruption to the structure and evolution of the weather systems that cross South America. In particular, cold fronts tend to be “channeled” to the north immediately to the east of the Andes, fostering ...

Marcelo E. Seluchi; RenéD. Garreaud; Federico A. Norte; A. Celeste Saulo

2006-11-01T23:59:59.000Z

189

The Orographic Modulation of Pre-Warm-Front Precipitation in Southern New England  

Science Conference Proceedings (OSTI)

Topographic forcing over the hills and small mountains of southern New England plays an important role in determining the distribution of pre-warm-front precipitation from winter cyclones. Upslope regions receive 20–60% more precipitation than do ...

Richard E. Passarelli Jr.; Hannah Boehme

1983-05-01T23:59:59.000Z

190

A Mean Synoptic View of the Subantarctic Front South of Australia  

Science Conference Proceedings (OSTI)

A mean synoptic view of the subantarctic front (SAF) is obtained from current meter and hydrographic data by averaging absolute and baroclinic velocity measurements in bins defined by a cross-stream coordinate that moves with the current. The ...

Helen E. Phillips; Stephen R. Rintoul

2002-05-01T23:59:59.000Z

191

A New Statistical Modeling Approach to Ocean Front Detection from SST Satellite Images  

Science Conference Proceedings (OSTI)

Ocean fronts are narrow zones of intense dynamic activity that play an important role in global ocean–atmosphere interactions. Owing to their highly variable nature, both in space and time, they are notoriously difficult features to adequately ...

Jo Hopkins; Peter Challenor; Andrew G. P. Shaw

2010-01-01T23:59:59.000Z

192

Relationship between a Weakening Cold Front, Misocyclones, and Cloud Development on 10 June 2002 during IHOP  

Science Conference Proceedings (OSTI)

The finescale structure and evolution of a cold front in the presence of small-scale circulations are examined using overdetermined dual-Doppler syntheses of mobile radar data along with thermodynamic data and cloud imagery collected on 10 June ...

Nettie R. Arnott; Yvette P. Richardson; Joshua M. Wurman; Erik M. Rasmussen

2006-01-01T23:59:59.000Z

193

Experimental evaluation of the in-plane seismic behavior of store-front window systems  

E-Print Network (OSTI)

J. , (1960). Behavior of window panels under in-planeC. , (1997). Behavior of window glass panels duringBehavior of Store-front Window Systems A thesis submitted in

Eva, Charles Almond

2009-01-01T23:59:59.000Z

194

The Stability of Steady Fronts and the Adjoint Method: Nonmodal Frontal Waves  

Science Conference Proceedings (OSTI)

The adjoint method for finding optimal or singular modes is employed for studying the finite time stability of steady, tw0-dimensional atmospheric fronts as represented by the uniform potential vorticity semigeostrophic model.

Alain Joly

1995-09-01T23:59:59.000Z

195

The Norwegian IPY–THORPEX: Polar Lows and Arctic Fronts during the 2008 Andøya Campaign  

Science Conference Proceedings (OSTI)

From a weather forecasting perspective, the Arctic poses particular challenges for mainly two reasons: 1) The observational data are sparse and 2) the weather phenomena responsible for severe weather, such as polar lows, Arctic fronts, and orographic ...

J. E. Kristjánsson; I. Barstad; T. Aspelien; I. Føre; Ø. Godøy; Ø. Hov; E. Irvine; T. Iversen; E. Kolstad; T. E. Nordeng; H. McInnes; R. Randriamampianina; J. Reuder; Ø. Saetra; M. Shapiro; T. Spengler; H. Ólafsson

2011-11-01T23:59:59.000Z

196

Light-Front Quantization of the Polyakov D1 Brane Action With a Scalar Dilaton Field  

E-Print Network (OSTI)

Light-front quantization of the conformally gauge-fixed Polyakov D1 brane action with a scalar dilaton field is studied using the equal light-cone world-sheet time framework.

D. S. Kulshreshtha

2007-11-08T23:59:59.000Z

197

Cold Fronts Aloft and the Forecasting of Precipitation and Severe Weather East of the Rocky Mountains  

Science Conference Proceedings (OSTI)

Brief descriptions are given of four cases that illustrate the important role that cold fronts aloft (CFA) can play in producing significant weather cast of the Rocky Mountains. In all four cases, the CFA, and its associated short wave, were ...

Peter V. Hobbs; John D. Locatelli; Jonathan E. Martin

1990-12-01T23:59:59.000Z

198

Comparative Analysis of Low-Level Cold Fronts: Wavelet, Fourier, and Empirical Orthogonal Function Decompositions  

Science Conference Proceedings (OSTI)

Atmospheric cold fronts observed in the boundary layer represent relatively sharp transition zones between air masses of disparate physical characteristics. Further, wavelike features and/or eddy structures are often observed in conjunction with ...

Nimal Gamage; William Blumen

1993-10-01T23:59:59.000Z

199

Coevolution of inverse cascade and nonlinear heat front in shear flows of strongly coupled Yukawa liquids  

Science Conference Proceedings (OSTI)

Using classical molecular dynamics (MD) simulations, we report on the development and propagation of a nonlinear heat front in parallel shear flows of a strongly coupled Yukawa liquid. At a given coupling strength, a subsonic shear profile is superposed on an equilibrated Yukawa liquid and Kelvin Helmholtz (KH) instability is observed. Coherent vortices are seen to emerge towards the nonlinear regime of the instability. It is seen that while inverse cascade leads to a continuous transfer of flow energy towards the largest scales, there is also a simultaneous transfer of flow energy into the thermal velocities of grains at the smallest scale. The latter is an effect of velocity shear and thus leads to the generation of a nonlinear heat front. In the linear regime, the heat front is seen to propagate at speed much lesser than the adiabatic sound speed of the liquid. Spatio-temporal growth of this heat front occurs concurrently with the inverse cascade of KH modes.

Ashwin, J.; Ganesh, R. [Institute for Plasma Research, Bhat, Gandhinagar 382428, Gujarat (India)

2011-08-15T23:59:59.000Z

200

Commissioning of the SNS front-end systems at Berkeley Lab  

E-Print Network (OSTI)

Results Obtained with the SNS H - Ion Source and LEBT atVarious contributions by SNS authors to these conferenceCOMMISSIONING OF THE SNS FRONT-END SYSTEMS AT BERKELEY LAB*

2002-01-01T23:59:59.000Z

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


201

The SNS front-end, an injector for a high-power hydrogen-ion accelerator  

E-Print Network (OSTI)

Stockli, R. Welton, and M. White (SNS-ORNL); J. Power and M.VI. REFERENCES N. Holtkamp, “The SNS Linac and Storage Ring:the FES Team, “Status of the SNS Front-End Sys- tems, Paper

Keller, R.

2002-01-01T23:59:59.000Z

202

The Marine Boundary Layer in the Vicinity of an Ocean Front  

Science Conference Proceedings (OSTI)

Aircraft observations obtained during the Frontal Air–Sea Interaction Experiment (FASINEX) are used to investigate the structure of the marine atmospheric boundary layer in the vicinity of an ocean front. A quasi-stationary sea surface ...

David P. Rogers

1989-07-01T23:59:59.000Z

203

Unstable Waves on Oceanic Fronts: Large Amplitude Behavior and Mean Flow Generation  

Science Conference Proceedings (OSTI)

A primitive equation numerical model is used to study the large amplitude behavior of unstable waves on an oceanic density front, concentrating on a single wave mode corresponding to the fastest growing linear solution. At Small amplitude the ...

Richard A. Wood

1988-05-01T23:59:59.000Z

204

Mesoscale Energy Spectra of Mei-Yu Front System. Part I: Kinetic Energy Spectra  

Science Conference Proceedings (OSTI)

The mesoscale kinetic energy (KE) spectra of Mei-Yu front system are investigated through idealized numerical simulations. In the mature stage, the upper tropospheric KE spectrum resembles a -3 power law for wavelengths between 1000 and 400 km and ...

Jun Peng; Lifeng Zhang; Yu Luo; Yun Zhang

205

The Evolution of an Observed Cold Front. Part II: Mesoscale Dynamics  

Science Conference Proceedings (OSTI)

A detailed analysis is made of a three-dimensional numerical simulation of the evolution of an observed moist frontal system over a 48 h period. The simulated front undergoes an initial period of frontogenetic growth, characterized by an ...

Isidoro Orlanski; Bruce B. Ross

1984-05-01T23:59:59.000Z

206

The Evolution of an Observed Cold Front. Part I. Numerical Simulation  

Science Conference Proceedings (OSTI)

The 48 h evolution of an observed cold front is simulated by a three-dimensional mesoscale-numerical model for a typical springtime synoptic situation over the southeastern United States. The model used in this study employs anelastic equations ...

Bruce B. Ross; Isidoro Orlanski

1982-02-01T23:59:59.000Z

207

A survey of front end modularity as an automotive architecture and its ability to deliver value  

E-Print Network (OSTI)

The partitioning of a system can and will dictate the creative space for a designer or engineer. This thesis will analyze how using a new automotive architecture known as a Front End Module (FEM) can affect a limited ...

Mahé, Vincent R. (Vincent Robert)

2008-01-01T23:59:59.000Z

208

Absolute Transports of Mass and Temperature for the North Atlantic Current– Subpolar Front System  

Science Conference Proceedings (OSTI)

The flow of subtropical waters carried into the northern North Atlantic Ocean by the North Atlantic Current– subpolar front system (NAC–SPF) is an important component of the meridional overturning circulation. These waters become colder and ...

Paula Pérez-Brunius; Tom Rossby; D. Randolph Watts

2004-08-01T23:59:59.000Z

209

A 6-yr Climatology of Fronts Affecting Helsinki, Finland, and Their Boundary Layer Structure  

Science Conference Proceedings (OSTI)

A 6-yr climatology of the frequency, characteristics, and boundary layer structure of synoptic-scale fronts in Helsinki, Finland, was created using significant weather charts and observations from a 327-m-tall mast and from the Station for ...

Victoria A. Sinclair

2013-09-01T23:59:59.000Z

210

Boundary layer convergence induced by strong winds across a midlatitude SST front  

Science Conference Proceedings (OSTI)

Recent studies indicate that midlatitude SST fronts’ influence extends through the marine atmospheric boundary layer (MABL) into the free atmosphere, with implications for climate variability. To better understand the mechanisms of this ocean-to-...

Thomas Kilpatrick; Niklas Schneider; Bo Qiu

211

Variability of the Intertropical Front (ITF) and Rainfall over the West African Sudan–Sahel Zone  

Science Conference Proceedings (OSTI)

The Intertropical Front (ITF) is a fundamental feature of the atmospheric circulation over West Africa. It separates the wedge of warm moist southwesterly monsoon flow off the tropical Atlantic from much hotter and very dry northeasterly wind ...

M. Issa Lélé; Peter J. Lamb

2010-07-01T23:59:59.000Z

212

Low-Frequency Variability in the Midlatitude Atmosphere Induced by an Oceanic Thermal Front  

Science Conference Proceedings (OSTI)

This study examines the flow induced in a highly idealized atmospheric model by an east–west-oriented oceanic thermal front. The model has a linear marine boundary layer coupled to a quasigeostrophic, equivalent- barotropic free atmosphere. The ...

Yizhak Feliks; Michael Ghil; Eric Simonnet

2004-05-01T23:59:59.000Z

213

Diapycnal Diffusivity Inferred from Scalar Microstructure Measurements near the New England Shelf/Slope Front  

Science Conference Proceedings (OSTI)

Conductivity microstructure was used to estimate the diapycnal thermal eddy diffusivity KT near the New England shelf/slope front in early August 1997. Two datasets were collected with a towed vehicle. One involved several horizontal tows in and ...

Chris R. Rehmann; Timothy F. Duda

2000-06-01T23:59:59.000Z

214

The Cold Front of 15 April 1994 over the Central United States. Part I: Observations  

Science Conference Proceedings (OSTI)

Detailed observations of the interactions of a cold front and a dryline over the central United States that led to dramatic undulations in the boundary layer, including an undular bore, are investigated using high-resolution water vapor mixing ...

B. B. Demoz; D. O’C. Starr; K. D. Evans; A. R. Lare; D. N. Whiteman; G. Schwemmer; R. A. Ferrare; J. E. M. Goldsmith; S. E. Bisson

2005-06-01T23:59:59.000Z

215

A Laboratory Model of Thermocline Depth and Exchange Fluxes across Circumpolar Fronts  

Science Conference Proceedings (OSTI)

A laboratory experiment has been constructed to investigate the possibility that the equilibrium depth of a circumpolar front is set by a balance between the rate at which potential energy is created by mechanical and buoyancy forcing and the ...

Claudia Cenedese; John Marshall; J. A. Whitehead

2004-03-01T23:59:59.000Z

216

Topographic Distortion of a Cold Front over the Snake River Plain and Central Idaho Mountains  

Science Conference Proceedings (OSTI)

The topographic distortion of a cold front over the Snake River Plain (SRP) and central Idaho Mountains on 3 December 1998 is described using high-density surface observations from MesoWest, a collection of meteorological networks over the ...

W. James Steenburgh; Thomas R. Blazek

2001-06-01T23:59:59.000Z

217

On the Front Lines 162 Los Alamos Science Number 23 1995  

E-Print Network (OSTI)

On the Front Lines 162 Los Alamos Science Number 23 1995 I n 1943, the Manhattan Project. Baumbach, S. Fried, P. L. Kirk and, R. S. Rosenfels (Manhattan Project Report CK-1143, December 1943

Massey, Thomas N.

218

Potential Vorticity and Vertical Velocity at the Iceland-Færœs Front  

Science Conference Proceedings (OSTI)

Using data from high-resolution surveys of the Iceland- Færœs Front, the authors have calculated synoptic maps of the geostrophic velocity, vorticity, and potential vorticity on isopycnal surfaces. The data have also been used to diagnose the ...

J. T. Allen; D. A. Smeed

1996-12-01T23:59:59.000Z

219

Non-Adiabatic Effects on Combustion Front Propagation in Porous Media: Multiplicity of Steady States  

Science Conference Proceedings (OSTI)

The sustained propagation of combustion fronts in porous media is a necessary condition for the success of an in situ combustion project for oil recovery. Compared to other recovery methods, in situ combustion involves the added complexity of exothermic reactions and temperature-dependent chemical kinetics. In the presence of heat losses, the possibility of ignition and extinction (quenching) exists. In this report, we address the properties of combustion fronts propagating at a constant velocity in the presence of heat losses.

Akkutlu, I. Yucel; Yortsos, Yanis C.

2002-03-11T23:59:59.000Z

220

Coordinate-free description of corrugated flames with realistic density drop at the front  

E-Print Network (OSTI)

The complete set of hydrodynamic equations for a corrugated flame front is reduced to a system of coordinate-free equations at the front using the fact that vorticity effects remain relatively weak even for corrugated flames. It is demonstrated how small but finite flame thickness may be taken into account in the equations. Similar equations are obtained for turbulent burning in the flamelet regime. The equations for a turbulent corrugated flame are consistent with the Taylor hypothesis of stationary external turbulence.

Vitaly Bychkov; Maxim Zaytsev; V'yacheslav Akkerman

2012-10-30T23:59:59.000Z

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


221

Influence of p-method finite element parameters on predictions of crack front geometry  

Science Conference Proceedings (OSTI)

The effect of various p-method finite element model parameters on the prediction of planar crack front geometry in three dimensional structures is evaluated. An automatic crack growth method was developed using the commercial software StressCheck coupled ... Keywords: ?, Corner crack, Crack front, Finite element, Mesh, Stress intensity factor, a, b, b/a, c, ctrat, ipr, m, mrat, p-method, trans

Diane Wowk, Kyle Gamble, Ross Underhill

2013-10-01T23:59:59.000Z

222

Wave front fragmentation due to ventricular geometry in a model of the rabbit heart  

Science Conference Proceedings (OSTI)

The role of the heart’s complex shape in causing the fragmentation of activation wave fronts characteristic of ventricular fibrillation (VF) has not been well studied. We used a finite element model of cardiac propagation capable of simulating functional reentry on curved two-dimensional surfaces to test the hypothesis that uneven surface curvature can cause local propagation block leading to proliferation of reentrant wave fronts. We found that when reentry was induced on a flat sheet

Jack M. Rogers

2002-01-01T23:59:59.000Z

223

AdS/QCD, Light-Front Holography, and Color Confinement  

E-Print Network (OSTI)

A remarkable holographic feature of dynamics in AdS space in five dimensions is that it is dual to Hamiltonian theory in physical space-time, quantized at fixed light-front time {\\tau} = t+z/c. This light-front holographic principle provides a precise relation between the bound-state amplitudes in AdS space and the boost-invariant light-front wavefunctions describing the internal structure of hadrons in physical space-time. The fifth dimension coordinate z is dual to the light front variable {\\zeta} describing the invariant separation of the quark constituents. The resulting valence Fock-state wavefunction eigensolutions of the light-front QCD Hamiltonian satisfy a single-variable relativistic equation of motion, analogous to the nonrelativistic radial Schr\\"odinger equation. The soft-wall dilaton profile exp ({\\kappa}^2 {\\zeta}^2) provides a model for the light-front potential which is color-confining and reproduces well the linear Regge behavior of the light-quark hadron spectrum in both L, the orbital angu...

Brodsky, Stanley J

2013-01-01T23:59:59.000Z

224

AdS/QCD and Applications of Light-Front Holography  

SciTech Connect

Light-Front Holography leads to a rigorous connection between hadronic amplitudes in a higher dimensional anti-de Sitter (AdS) space and frame-independent light-front wavefunctions of hadrons in 3 + 1 physical space-time, thus providing a compelling physical interpretation of the AdS/CFT correspondence principle and AdS/QCD, a useful framework which describes the correspondence between theories in a modified AdS5 background and confining field theories in physical space-time. To a first semiclassical approximation, where quantum loops and quark masses are not included, this approach leads to a single-variable light-front Schroedinger equation which determines the eigenspectrum and the light-front wavefunctions of hadrons for general spin and orbital angular momentum. The coordinate z in AdS space is uniquely identified with a Lorentz-invariant coordinate {zeta} which measures the separation of the constituents within a hadron at equal light-front time. The internal structure of hadrons is explicitly introduced and the angular momentum of the constituents plays a key role. We give an overview of the light-front holographic approach to strongly coupled QCD. In particular, we study the photon-to-meson transition form factors (TFFs) F{sub M{gamma}}(Q{sup 2}) for {gamma}{gamma}* {yields} M using light-front holographic methods. The results for the TFFs for the {eta} and {eta}' mesons are also presented. Some novel features of QCD are discussed, including the consequences of confinement for quark and gluon condensates. A method for computing the hadronization of quark and gluon jets at the amplitude level is outlined.

Brodsky, Stanley J.; /SLAC /Southern Denmark U., CP3-Origins; Cao, Fu-Guang; /Massey U.; de Teramond, Guy F.; /Costa Rica U.

2012-02-16T23:59:59.000Z

225

Design of the NSLS-II Linac Front End Test Stand  

SciTech Connect

The NSLS-II operational parameters place very stringent requirements on the injection system. Among these are the charge per bunch train at low emittance that is required from the linac along with the uniformity of the charge per bunch along the train. The NSLS-II linac is a 200 MeV linac produced by Research Instruments Gmbh. Part of the strategy for understanding to operation of the injectors is to test the front end of the linac prior to its installation in the facility. The linac front end consists of a 100 kV electron gun, 500 MHz subharmonic prebuncher, focusing solenoids and a suite of diagnostics. The diagnostics in the front end need to be supplemented with an additional suite of diagnostics to fully characterize the beam. In this paper we discuss the design of a test stand to measure the various properties of the beam generated from this section. In particular, the test stand will measure the charge, transverse emittance, energy, energy spread, and bunching performance of the linac front end under all operating conditions of the front end.

Fliller III, R.; Johanson, M.; Lucas, M.; Rose, J.; Shaftan, T.

2011-03-28T23:59:59.000Z

226

Apparatus for characterizing the temporo-spatial properties of a dynamic fluid front and method thereof  

SciTech Connect

Methods and apparatus are described for characterizing the temporal-spatial properties of a dynamic fluid front within a mold space while the mold space is being filled with fluid. A method includes providing a mold defining a mold space and having one or more openings into the mold space; heating a plurality of temperature sensors that extend into the mold space; injecting a fluid into th emold space through the openings, the fluid experiencing a dynamic fluid front while filling the mold space with a fluid; and characterizing temporal-spatial properties of the dynamic fluid front by monitoring a termperature of each of the plurality of heated temperature sensors while the mold space is being filled with the fluid. An apparatus includes a mold defining a mold space; one or more openings for introducing a fluid into th emold space and filling the mold space with the fluid, the fluid experiencing a dynamic fluid front while filling the mold space; a plurality of heated temperature sensors extending into the mold space; and a computer coupled to the plurality of heated temperature sensors for characterizing the temporal-spatial properties of the dynamic fluid front.

Battiste, Richard L

2013-12-31T23:59:59.000Z

227

A Model for Tracking Fronts of Stress-Induced Permeability Enhancement  

E-Print Network (OSTI)

Using an analogy to the classical Stefan problem, we construct evolution equations for the fluid pore pressure on both sides of a propagating stress-induced damage front. Closed form expressions are derived for the position of the damage front as a function of time for the cases of thermally-induced damage as well as damage induced by over-pressure. We derive expressions for the flow rate during constant pressure fluid injection from the surface corresponding to a spherically shaped subsurface damage front. Finally, our model results suggest an interpretation of field data obtained during constant pressure fluid injection over the course of 16 days at an injection site near Desert Peak, NV.

K. C. Lewis; Satish Karra; Sharad Kelkar

2013-05-15T23:59:59.000Z

228

A Model for Tracking Fronts of Stress-Induced Permeability Enhancement  

E-Print Network (OSTI)

Using an analogy to the classical Stefan problem, we construct evolution equations for the fluid pore pressure on both sides of a propagating stress-induced damage front. Closed form expressions are derived for the position of the damage front as a function of time for the cases of thermally-induced damage as well as damage induced by over-pressure. We derive expressions for the flow rate during constant pressure fluid injection from the surface corresponding to a spherically shaped subsurface damage front. Finally, our model results suggest an interpretation of field data obtained during constant pressure fluid injection over the course of 16 days at an injection site near Desert Peak, NV.

Lewis, K C; Kelkar, Sharad

2013-01-01T23:59:59.000Z

229

Report on the value engineering workshop on APS beamline front ends  

SciTech Connect

A formal value engineering evaluation process was developed to address the front end components of the beamlines for the Advanced Photon Source (APS). This process (described in Section 2) involved an information phase, a creative phase, a judgment phase, a development phase, and a recommendation phase. Technical experts from other national laboratories and industry were invited to a two-day Value Engineering Workshop on November 5-6, 1992. The results of this Workshop are described in Section 4. Following the Workshop, various actions by the APS staff led to the redesign of the front end components, which are presented in Sections 5 and 6. The cost benefit analysis is presented in Section 7. It is important of realize that an added benefit of the Workshop was to obtain numerous design evaluations and enhancements of the front end components by experts in the field. As the design work proceeds to Title II completion, the APS staff is including many of these suggestions.

Kuzay, T.

1993-01-01T23:59:59.000Z

230

Measures of the Environmental Footprint of the Front End of the Nuclear Fuel Cycle  

Science Conference Proceedings (OSTI)

Previous estimates of environmental impacts associated with the front end of the nuclear fuel cycle have focused primarily on energy consumption and CO2 emissions. Results have varied widely. Section 2 of this report provides a summary of historical estimates. This study revises existing empirical correlations and their underlying assumptions to fit to a more complete set of existing data. This study also addresses land transformation, water withdrawals, and occupational and public health impacts associated with the processes of the front end of the once-through nuclear fuel cycle. These processes include uranium mining, milling, refining, conversion, enrichment, and fuel fabrication. Metrics are developed to allow environmental impacts to be summed across the full set of front end processes, including transportation and disposition of the resulting depleted uranium.

Brett Carlsen; Emily Tavrides; Erich Schneider

2010-08-01T23:59:59.000Z

231

Characteristics of Medical Research News Reported on Front Pages of Newspapers  

E-Print Network (OSTI)

Background: The placement of medical research news on a newspaper’s front page is intended to gain the public’s attention, so it is important to understand the source of the news in terms of research maturity and evidence level. Methodology/Principal Findings: We searched LexisNexis to identify medical research reported on front pages of major newspapers published from January 1, 2000 to December 31, 2002. We used MEDLINE and Google Scholar to find journal articles corresponding to the research, and determined their evidence level. Of 734 front-page medical research stories identified, 417 (57%) referred to mature research published in peer-reviewed journals. The remaining 317 stories referred to preliminary findings presented at scientific or press meetings; 144 (45%) of those stories mentioned studies that later matured (i.e. were published in journals within 3 years after news coverage). The evidence-level distribution of the 515

William Yuk; Yeu Lai; Trevor Lane

2008-01-01T23:59:59.000Z

232

Alternative Muon Front-end for the International Design Study (IDS)  

E-Print Network (OSTI)

We discuss alternative designs of the muon capture front end of the Neutrino Factory International Design Study (IDS). In the front end, a proton bunch on a target creates secondary pions that drift into a capture channel, decaying into muons. A sequence of RF cavities forms the resulting muon beams into strings of bunches of differing energies, aligns the bunches to (nearly) equal central energies, and initiates ionization cooling. This design is affected by limitations on accelerating gradients within magnetic fields. The effects of gradient limitations are explored, and mitigation strategies are presented

Alekou, A; Martini, M; Prior, G; Rogers, C; Stratakis, D; Yoshikawa, C; Zisman, M

2010-01-01T23:59:59.000Z

233

Into the Teeth of the Gale: The Remarkable Advance of a Cold Front at Grand Manan  

Science Conference Proceedings (OSTI)

The afternoon of 30 December 1962 saw the nearly simultaneous arrival at Grand Manan (an island in the Bay of Fundy) of an intense cold front, accompanied by northwesterly gales and snow, and an intense small cyclonic vortex, producing a mild ...

Robert M. Cunningham; Frederick Sanders

1987-10-01T23:59:59.000Z

234

On the Formation of Potential-Vorticity Anomalies in Upper-Level Jet-Front Systems  

Science Conference Proceedings (OSTI)

We review and discuss a difference in interpretation of the role of turbulence in modifying the potential-vorticity distribution in the vicinity of upper-level jet-front systems. In the late 1970s, M. A. Shapiro presented observational evidence ...

Daniel Keyser; Richard Rotunno

1990-09-01T23:59:59.000Z

235

Solar cells conversion efficiency maximisation based on sol-gel method and front surface texturisation  

Science Conference Proceedings (OSTI)

This paper presents experiments and evaluations on a new silicon solar cell structure obtained by texturisation of the front surface using silicon micromachining technologies. The textured surface of the solar cell is made in order to reduce frontal ... Keywords: light trapping, micromachining, silicon, sol-gel method, solar cells, texturisation

Lucian Milea; Orest Oltu; Claudius Teodorescu; Verona Muntean; Marius Stoian

2008-07-01T23:59:59.000Z

236

The Energy Spectrum of Fronts: Time Evolution of Shocks in Burgers‚ Equation  

Science Conference Proceedings (OSTI)

Andrews and Hoskins used semigeostrophic theory to argue that the energy spectrum of a front should decay like the ?8/3 power of the wavenumber. They note, however, that their inviscid analysis is restricted to the very moment of breaking; that ...

John P. Boyd

1992-01-01T23:59:59.000Z

237

Research Aircraft Observations and Numerical Simulations of a Warm Front Approaching Vancouver Island  

Science Conference Proceedings (OSTI)

The mesoscale structure of the low-level flow and the character of the turbulence are investigated for a warm front as it approached the prominent terrain of the Pacific Northwest in the vicinity of Vancouver Island. Flight-level and airborne ...

James D. Doyle; Nicholas A. Bond

2001-05-01T23:59:59.000Z

238

Norwegian-Type and Cold Front Aloft–Type Cyclones East of the Rocky Mountains  

Science Conference Proceedings (OSTI)

Conventional data and mesoscale model simulations are used to analyze two cyclones that developed east of the Rocky Mountains in June and November 1998. Both cyclones formed when a Pacific cold front overtook a lee trough/dryline east of the ...

John D. Locatelli; Ralph D. Schwartz; Mark T. Stoelinga; Peter V. Hobbs

2002-02-01T23:59:59.000Z

239

A six-year climatology of fronts affecting Helsinki, Finland and their boundary layer structure  

Science Conference Proceedings (OSTI)

A six-year climatology of the frequency, characteristics, and boundary-layer structure of synoptic-scale fronts in Helsinki, Finland was created using significant weather charts and observations from a 327 m tall mast and from the Station for ...

Victoria A. Sinclair

240

Research Article: Ranking of microRNA target prediction scores by Pareto front analysis  

Science Conference Proceedings (OSTI)

Over the past ten years, a variety of microRNA target prediction methods has been developed, and many of the methods are constantly improved and adapted to recent insights into miRNA-mRNA interactions. In a typical scenario, different methods return ... Keywords: MicroRNAs, Multi-objective optimisation, Pareto front, Target mRNAs

Sudhakar Sahoo; Andreas A. Albrecht

2010-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "horsepower change front" 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

Light-Like Noncommutativity, Light-Front Quantization and New Light on UV/IR Mixing  

E-Print Network (OSTI)

We revisit the problem of quantizing field theories on noncommutative Moyal spacetime with \\emph{light-like} noncommutativity. To tackle the issues arising from noncommuting and hence nonlocal time, we argue that for this case light-front quantization procedure should be employed. In this appropriate quantization scheme we perform the non-planar loop analysis for the light-like noncommutative field theories. One of the important and peculiar features of light-front quantization is that the UV cutoff of the light-cone Hamiltonian manifests itself as an IR cutoff for the light-cone momentum, $p^+$. Due to this feature, the naive results of covariant quantization for the light-like case allude to the absence of the UV/IR mixing in the light-front quantization. However, by a careful analysis of non-planar loop integrals we show that this is not the case and the UV/IR mixing persists. In addition, we argue in favour of the perturbative unitarity of light-like noncommutative field theories in the light-front quantization scheme.

M. M. Sheikh-Jabbari; A. Tureanu

2010-10-02T23:59:59.000Z

242

Unusually Long Duration, Multiple-Doppler Radar Observations of a Front in a Convective Boundary Layer  

Science Conference Proceedings (OSTI)

Dual-Doppler observations acquired by a network of mobile radars deployed in the Oklahoma panhandle on 3 June 2002 are used to document the kinematic structure and evolution of a front. The data were collected during the International H2O Project ...

John R. Stonitsch; Paul M. Markowski

2007-01-01T23:59:59.000Z

243

The Influence of Canyon Winds on Flow Fields near Colorado's Front Range  

Science Conference Proceedings (OSTI)

A network of sodars was operated in the late summer and fall of 1993 to monitor the occurrence of nocturnal winds from a canyon in Colorado's Front Range near the Rocky Flats Plant and to determine the influence of those winds on the flow fields ...

J. C. Doran

1996-04-01T23:59:59.000Z

244

Average crack front velocity during subcritical fracture propagation in a heterogeneous medium  

E-Print Network (OSTI)

the free energy, and thus the energy barrier, via numerous competing mech- anisms like stress corrosion speed of crack growth with increasing G; a weak stress- sensitive regime II follows where transportAverage crack front velocity during subcritical fracture propagation in a heterogeneous medium

Ampuero, Jean Paul

245

User-centric composition of service front-ends at the presentation layer  

Science Conference Proceedings (OSTI)

The emerge of web services in Service-Oriented Architectures (SOA) within companies or at the global internet offers new ways for the creation of web applications. Even though the composition of services via business processes are covered by existing ... Keywords: UI integration, service composition at the presentation layer, service front-ends

Tobias Nestler; Lars Dannecker; Andreas Pursche

2009-11-01T23:59:59.000Z

246

Baroclinic Eady Wave and Fronts. Part I: Viscous Semigeostrophy and the Impact of Boundary Condition  

Science Conference Proceedings (OSTI)

A two-dimensional viscous semigeostrophic model is developed to study the evolution of the baroclinic Eady wave and fronts with two types (free-slip and nonslip) of boundary conditions. With the free-slip boundary condition, the solution is very ...

Qin Xu; Wei Gu; Jidong Gao

1998-12-01T23:59:59.000Z

247

The Dependence of Canyon Winds on Surface Cooling and External Forcing in Colorado's Front Range  

Science Conference Proceedings (OSTI)

The atmospheric katabatic flow in the foothills of the Front Range of the Rocky Mountains has been monitored by a network of towers and sodars for several years as part of the ASCOT program. The dependence of the outflow from Coal Creek Canyon on ...

Richard L. Coulter; Paul Gudiksen

1995-06-01T23:59:59.000Z

248

Silicon Solar Cells with Front Hetero-Contact and Aluminum Alloy Back Junction: Preprint  

DOE Green Energy (OSTI)

We prototype an alternative n-type monocrystalline silicon (c-Si) solar cell structure that utilizes an n/i-type hydrogenated amorphous silicon (a-Si:H) front hetero-contact and a back p-n junction formed by alloying aluminum (Al) with the n-type Si wafer.

Yuan, H.-C.; Page, M. R.; Iwaniczko, E.; Xu, Y.; Roybal, L.; Wang, Q.; Branz, H. M.; Meier, D. L.

2008-05-01T23:59:59.000Z

249

ATJDITORY MASKING BASED ACOUSTIC FRONT-END FOR ROBUST SPEECH RECOGNITION  

E-Print Network (OSTI)

to the mismatched conditions [15]. Adding white noise to the signal results in an constant addition to the log power the effect of additive noise distortion, white Gaussian noise is added to the speech signal and speech.Paliwal@me.gu.edu.au ABSTRACT This paper presents an acoustic front-end which uses the properties of auditory masking

250

Light-front Holography - A New Approach to Relativistic Hadron Dynamics and Nonperturbative QCD  

Science Conference Proceedings (OSTI)

The holographic mapping of gravity in AdS space to QCD, quantized at fixed light-front time, provides a precise relation between the bound-state amplitudes in the fifth dimension of AdS space and the boost-invariant light-front wavefunctions describing the internal structure of hadrons in physical space-time. In particular, the elastic and transition form factors of the pion and the nucleons are well described in this framework. The light-front AdS/QCD holographic approach thus gives a frame-independent first approximation of the color-confining dynamics, spectroscopy, and excitation spectra of relativistic light-quark bound states in QCD. More generally, we show that the valence Fock-state wavefunctions of the eigensolutions of the light-front QCD Hamiltonian satisfy a single-variable relativistic equation of motion, analogous to the nonrelativistic radial Schroedinger equation, with an effective confining potential which systematically incorporates the effects of higher quark and gluon Fock states. The proposed method to compute the effective interaction thus resembles the two-particle-irreducible functional techniques used in quantum field theory.

de Teramond, Guy F.; Brodsky, Stanley J.

2012-06-20T23:59:59.000Z

251

Mesoscale Energy Spectra of the Mei-Yu Front System. Part I: Kinetic Energy Spectra  

Science Conference Proceedings (OSTI)

The mesoscale kinetic energy (KE) spectra of the mei-yu front system are investigated through idealized numerical simulations. In the mature stage, the upper-tropospheric KE spectrum resembles a ?3 power law for wavelengths between 1000 and 400 km ...

Jun Peng; Lifeng Zhang; Yu Luo; Yun Zhang

2014-01-01T23:59:59.000Z

252

Diabatic Effects on Late-Winter Cold Front Evolution: Conceptual and Numerical Model Evaluations  

Science Conference Proceedings (OSTI)

The impact of diabatic heating on late winter frontogenesis is evaluated both through conceptual scaling and the use of high-resolution Eta Model simulations of a strong but relatively dry cold surface front that occurred during the Storm-scale ...

William A. Gallus Jr.; Moti Segal

1999-07-01T23:59:59.000Z

253

Geographic Window Sizes Applied to Remote Sensing Sea Surface Temperature Front Detection  

Science Conference Proceedings (OSTI)

The effects of using a geographic window size with an existing edge-detection technique for the detection of thermal fronts in sea surface temperature (SST) imagery are investigated. The size of a geographic window is not constant but instead is ...

Scott F. Diehl; Judith W. Budd; David Ullman; Jean-François Cayula

2002-07-01T23:59:59.000Z

254

Eastgate seen from the south-east, in front of Harare's glass and concrete towers  

E-Print Network (OSTI)

Eastgate seen from the south-east, in front of Harare's glass and concrete towers #12;Eastgate officesEastgate offices Level two #12;Sections showing the passive cooling system #12;Cooling the office the degree of internal cooling achieved during April 1998 #12;· The termitary model · The termitary is an i f

Behmer, Spencer T.

255

Electronic-nose for detecting environmental pollutants: signal processing and analog front-end design  

Science Conference Proceedings (OSTI)

Environmental monitoring relies on compact, portable sensor systems capable of detecting pollutants in real-time. An integrated chemical sensor array system is developed for detection and identification of environmental pollutants in diesel and gasoline ... Keywords: ADC, Analog front end, Chopper stabilization, Electronic nose, Feature extraction, Gas sensors

Hyuntae Kim; Bharatan Konnanath; Prasanna Sattigeri; Joseph Wang; Ashok Mulchandani; Nosang Myung; Marc A. Deshusses; Andreas Spanias; Bertan Bakkaloglu

2012-01-01T23:59:59.000Z

256

The Three-Dimensional Circulation near the Eastern North pacific Subtropical Front  

Science Conference Proceedings (OSTI)

The purpose of our study is to describe and compute the large-scale, three-dimensional circulation near the Subtropical Front in the eastern North Pacific along 31°N. This was accomplished through the use of four extensive hydrographic surveys, ...

Pearn P. Niller; Richard W. Reynolds

1984-02-01T23:59:59.000Z

257

Some Two-Layer Models of the Shelf-Slope Front: Geostrophic Adjustment and its Maintenance  

Science Conference Proceedings (OSTI)

Two conceptual models of a two-layered frontal system are presented to study the wintertime shelf-slope front. The first model examines the geostrophic adjustment over a step topography after the fall overturning and applies only over short time ...

Hsien Wang Ou

1983-10-01T23:59:59.000Z

258

A Modeling Case Study of Heavy Rainstorms along the Mei-Yu Front  

Science Conference Proceedings (OSTI)

On 12–13 June 1991, a series of convective rainstorms (defined as mesoscale precipitation systems with rainfall rates exceeding 10 mm h?1) developed successively along the Mei-Yu front. During this event, new rainstorms formed to the east of ...

Shou-Jun Chen; Ying-Hwa Kuo; Wei Wang; Zu-Yu Tao; Bo Cui

1998-09-01T23:59:59.000Z

259

Mesoscale Thermohaline, Sound Velocity and Baroclinic Flow Structure of the Pacific Subtropical Front During the Winter of 1980  

Science Conference Proceedings (OSTI)

The three-dimensional thermohaline. sound velocity and baroclinic flow structure of the. pacific sub-tropical front during January and February 1990 are discussed. The front is meander-like, with a wavelength of 180 km, a wave amplitude of 55 km, ...

Gunnar I. Roden

1981-05-01T23:59:59.000Z

260

The Formation and Maintenance of Density Fronts on the U.S. Southeastern Continental Shelf during Winter  

Science Conference Proceedings (OSTI)

Density fronts on the U.S. southeastern continental shelf, during winter, am formed by (i) breakdown of the shelf-break front by Gulf Stream meanders or strong southward winds or both, (ii) shoreward intrusion of upper Gulf Stream warm water by ...

Lie-Yauw Oey

1986-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "horsepower change front" 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

Power efficient asynchronous multiplexer for X-ray sensors in medical imaging analog front-end electronics  

Science Conference Proceedings (OSTI)

This paper presents a new power efficient asynchronous multiplexer (MUX) for application in analog front-end electronics (AFE) used in X-ray medical imaging systems. Contrary to typical synchronous MUXes that have to be controlled by a clock, this circuit ... Keywords: Analog front end, Asynchronous circuits, Medical imaging, Multiplexers, X-ray detection

Rafa? D?ugosz; Pierre-André Farine; Kris Iniewski

2011-01-01T23:59:59.000Z

262

Personnel Change Notification ImagIng: GRSF/T  

E-Print Network (OSTI)

Personnel Change Notification OGS Form 3 ImagIng: GRSF/T Admit Year/Term: GS Web Front Desk: Office., reviewers, coordinators and chairs) Update: View all AIM Graduate Studies pages and enter decisions on GS02: Search for and view applicants; edit emails Connect: Add, search for and communicate with prospects

Hart, Gus

263

Study on reduction of accessory horsepower requirements. Fourth quarterly progress report  

DOE Green Energy (OSTI)

The program objective is to evolve and define an accessory drive system that will minimize system power consumption of driven accessories on an internal combustion engine in a passenger automobile. The initial three program phases established concept feasibility, determined potential fuel savings, and selected a drive system design for concept mechanization. During this quarter the major program accomplishments were: selection of candidate belt-drive concepts; completion of Phase III baseline vehicle drive systems physical and operational envelopes; completion of analysis for a mechanically controlled direct-operated belt drive with input programming; and completion of design layout and analysis for a hydromechanically controlled, servo-operated belt drive with output-speed sensing. (LLL)

Not Available

1975-07-30T23:59:59.000Z

264

Figure ES3. Sales-Weighted Horsepower and On-Road Fuel Mileage for ...  

U.S. Energy Information Administration (EIA)

Home > Households, Buildings & Industry >Transportation Surveys > Household Vehicles Energy Use > Figure ES3

265

Study on reduction of accessory horsepower requirements. Eleventh quarterly progress report  

DOE Green Energy (OSTI)

Progress in a program for optimizing automotive accessory systems to achieve greater vehicle fuel economy and improved accessory performance is reported. The major technical accomplishments during this reporting period were: all candidate advanced air conditioning concepts were evaluated; advanced air conditioning and hybrid accessory drive component trade-studies were completed; improved alternator, water pump and power steering system concepts were evaluated; the vehicle integrated accessory systems trade-study was completed; and the technical summary report for the Phase V Automotive Accessory Systems Optimization Program was initiated. (LCL)

Not Available

1977-04-30T23:59:59.000Z

266

Survey of Morphologies Formed in the Wake of an Enslaved Phase-Separation Front in Two Dimensions  

E-Print Network (OSTI)

A phase-separation front will leave in its wake a phase-separated morphology that differs markedly from homogeneous phase-separation morphologies. For a purely diffusive system such a front, moving with constant velocity, will generate very regular, non-equilibrium structures. We present here a numerical study of these fronts using a lattice Boltzmann method. In two dimensions these structures are regular stripes or droplet arrays. In general the kind and orientation of the selected morphology and the size of the domains depends on the speed of the front as well as the composition of the material overtaken by the phase-separation front. We present a survey of morphologies as a function of these two parameters. We show that the resulting morphologies are initial condition dependent. We then examine which of the potential morphologies is the most stable. An analytical analysis for symmetrical compositions predicts the transition point from orthogonal to parallel stripes.

E. M. Foard; A. J. Wagner

2011-03-28T23:59:59.000Z

267

Sequence of surface meteorological variables with the passage of winter cold fronts in the United States east of the Rocky Mountains  

E-Print Network (OSTI)

According to the 80-year-old Norwegian cyclone model, fronts are pressure troughs, extensions of a mid-latitude cyclone. Thus, a cold frontal passage is evidenced at the surface by a minimum in air pressure and a corresponding wind shift. In addition, decreases in both temperature and humidity also occur. This conceptual model assumes that these changes are nearly coincident in time; however, this is usually not the case. Strict adherence to the model is the basis for the highly subjective single line drawn on a synoptic chart to indicate a front. To evaluate the behavior of meteorological variables with cold frontal passage, data was collected for seven American cities east of the Rocky Mountains, including NMC/NCEP 3-hourly surface analyses and NCDC archived hourly surface observations during three consecutive winters (October 1-March 31). Surface analyses were used to estimate the time of frontal passage. Using these estimates as a guide, the hourly observations were employed to determine the specific hours at which each meteorological variable demonstrated a change that could be conclusively attributed to the frontal passage. The four meteorological variables scrutinized include temperature, moisture (dew point), wind (direction), and pressure. Significance of means tests were applied to assess the statistical significance of the differences between the timing of each pair of variables (temperature vs. wind, dew point vs. pressure, etc.). Statistically significant differences mathematically validate the sequence of the means and suggest the likely repeatability of the sequence. At all locations and for all subsets of fronts, the pressure rise and the wind shift consistently precede the decreases in temperature and dew point. The timing of the pressure rise, however, is nearly indistinguishable from the wind shift, and likewise, there is rarely any significant difference between the decrease in temperature and the decrease in dew point. While all the variables are essentially coincident in time for some fronts, there is a frequent disparity between the pressure rise/wind shift and the temperature/dew point decrease. The data thus suggest a double-boundary frontal zone, a surface pressure trough/wind shift line followed by a temperature/moisture boundary.

Huckaby, Daniel Dale

2001-01-01T23:59:59.000Z

268

The Low-Level Structure and Evolution of a Dry Arctic Front over the Central United States. Part II: Comparison with Theory  

Science Conference Proceedings (OSTI)

This investigation examines the meso- and microscale aspects of the 9 March 1992 cold front that passed through Kansas during the daylight hours. The principal feature of this front is the relatively rapid frontogenesis that occurred. The total ...

William Blumen; Nimal Gamage; Robert L. Grossman; Margaret A. LeMone; L. Jay Miller

1996-08-01T23:59:59.000Z

269

Temperature Equilibration Behind the Shock Front: an Optical and X-ray Study of RCW 86  

E-Print Network (OSTI)

We study the electron-proton temperature equilibration behind several shocks of the RCW 86 supernova remnant. To measure the proton temperature, we use published and new optical spectra, all from different locations on the remnant. For each location, we determine the electron temperature from X-ray spectra, and correct for temperature equilibration between the shock front and the location of the X-ray spectrum. We confirm the result of previous studies that the electron and proton temperatures behind shock fronts are consistent with equilibration for slow shocks and deviate for faster shocks. However, we can not confirm the previously reported trend of the electron temperature to proton temperature ratio of 1/v^2.

Helder, E A; Bassa, C G

2011-01-01T23:59:59.000Z

270

TEMPERATURE EQUILIBRATION BEHIND THE SHOCK FRONT: AN OPTICAL AND X-RAY STUDY OF RCW 86  

Science Conference Proceedings (OSTI)

We study the electron-proton temperature equilibration behind several shocks of the RCW 86 supernova remnant. To measure the proton temperature, we use published and new optical spectra, all from different locations on the remnant. For each location, we determine the electron temperature from X-ray spectra, and correct for temperature equilibration between the shock front and the location of the X-ray spectrum. We confirm the result of previous studies that the electron and proton temperatures behind shock fronts are consistent with equilibration for slow shocks and deviate for faster shocks. However, we cannot confirm the previously reported trend of T{sub e}/T{sub p}{proportional_to}1/v{sup 2}{sub s}.

Helder, E. A.; Vink, J. [Astronomical Institute, Utrecht University, P.O. Box 80000, NL-3508 TA Utrecht (Netherlands); Bassa, C. G., E-mail: e.a.helder@astro-uu.nl [Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL (United Kingdom)

2011-08-20T23:59:59.000Z

271

In-situ combustion process simulator with a moving-front representation. [THERMS  

Science Conference Proceedings (OSTI)

A description is given of THERMS a new three phase, black-oil simulator for in-situ combustion processes. The model also can simulate steam and hot-water injection operations. To simulate field-scale in-situ combustion projects, THERMS uses experimental data obtained from laboratory combustion-tube runs. Detailed kinetics and thermodynamic relations are not used. The model treats the burning zone as a moving front. The front is viewed not only as a moving heat source, but also as a displacement pump enhancing oil flow. This approach results in a new algorithm. The model has been designed with strongly field-oriented features. Its utility is illustrated by a history-matching study of the South Belridge, CA, dry-combustion pilot test. 11 refs.

Hwang, M.K.; Jines, W.R.; Odeh, A.S.

1982-04-01T23:59:59.000Z

272

Front cover  

Gasoline and Diesel Fuel Update (EIA)

INVESTMENT IN COMMODITIES MARKETS: INVESTMENT IN COMMODITIES MARKETS: POTENTIAL IMPACT ON COMMODITY PRICES & VOLATILITY IIF Commodities Task Force Submission to the G20 September 2011 IIF Commodities Task Force Submission to the G20 Financial Investment in Commodity Markets: Potential Impact on Commodity Prices & Volatility 1 Preface Amidst increasing concerns about global growth prospects and financial market volatility, commodity prices con- tinue to be a focus for policymakers. The French G-20 presidency has made this topic a priority, emphasizing the potential role of financial investment in driving trends in commodity markets. With commodity prices closely linked to inflation trends, particularly in low-income countries where food security is a vital issue, the search for policy tools

273

Front Matter  

E-Print Network (OSTI)

and 1976, Rhodesia's oil import costs trebled. To financethe regular price for oil. This extra cost for purchasing onand the oil price increase w~re deepened by the cost of

1986-01-01T23:59:59.000Z

274

Front Matter  

Science Conference Proceedings (OSTI)

I am delighted to have the honour to introduce the Proceedings of the Nineteenth European Conference on Artificial Intelligence (ECAI-2010), including the proceedings of the Sixth Conference on Prestigious Applications of Intelligent Systems (PAIS-2010). ...

2010-08-01T23:59:59.000Z

275

Front Matter  

Science Conference Proceedings (OSTI)

The 12th International Conference on Artificial Intelligence in Education (AIED-2005) is being held July 18--22, 2005, in Amsterdam, the beautiful Dutch city near the sea. AIED-2005 is the latest in an on-going series of biennial conferences in AIED ...

2005-05-01T23:59:59.000Z

276

Section: Front  

NLE Websites -- All DOE Office Websites (Extended Search)

GEWEX. One of these joint planning activities culminated in the field deployment of the Pilot Radiation Observation Experiment (PROBE) to Kavieng, Papua New Guinea, as part of...

277

Front Matter  

E-Print Network (OSTI)

Black Studies. Yashpa l A. Tandon, Ph.D. (London). FormerlyMUSEVENTSGOVERNMENT Yash Tandon THE RISE AND FALL OF TilE1964 a.r 1973, Dr. Tandon was Reader in the Depanment of

n/a, n/a

1987-01-01T23:59:59.000Z

278

Interplay of Wind Forcing and Buoyant Discharge off Montauk Point: Seasonal Changes to Velocity Structure and a Coastal Front  

Science Conference Proceedings (OSTI)

Seasonal-mean currents in fall, winter, and spring on the bathymetrically complex continental shelf 15–65 m deep off Montauk Point, outside Block Island Sound, are analyzed using moored profiling current-meter records from a 2.5-yr period. A ...

Daniel?L. Codiga

2005-06-01T23:59:59.000Z

279

Parametric Study of Front-End Nuclear Fuel Cycle Costs Using Reprocessed Uranium  

Science Conference Proceedings (OSTI)

This study evaluates front-end nuclear fuel cycle costs assuming that uranium recovered during the reprocessing of commercial light-water reactor (LWR) spent nuclear fuel is available to be recycled and used in the place of natural uranium. This report explores the relationship between the costs associated with using a natural uranium fuel cycle, in which reprocessed uranium (RepU) is not recycled, with those associated with using RepU.

2010-01-26T23:59:59.000Z

280

Mapping Neutral Hydrogen During Reionization with the Ly-alpha Emission from Quasar Ionization Fronts  

E-Print Network (OSTI)

We present a new method to directly map the neutral-hydrogen distribution during the reionization epoch and to constrain the emission properties of the highest-redshift quasars (QSOs). As a tracer of HI, we propose to use the Ly-alpha radiation produced by quasar ionization fronts (I-fronts) that expand in the partially ionized intergalactic medium (IGM) before reionization is complete. These Ly-alpha photons are mainly generated by collisional excitations of hydrogen atoms in the boundary of the rapidly expanding HII region. The observable signal is produced by the part of the I-front that lies behind the QSO with respect to the observer. Combining two radiative transfer models (one for the QSO ionizing radiation and one for the Ly-alpha photons), we estimate the expected Ly-alpha spectral shape and surface brightness (SB) for a large number of configurations where we varied both the properties of the ionizing QSO and of the surrounding medium. We find that the expected signal is observable as a single (broad) emission line with a characteristic width of 100-200 km/s. The expected SB produced at redshift z~6.5 within a fully neutral region (at mean density) by a typical QSO I-front lies in the range $10^{-21}-10^{-20}$ erg s$^{-1}$ cm$^{-2}$ arcsec$^{-2}$ and decreases proportionally to $(1+z)^2$ for a given QSO age. QSOs with harder spectra may produce a significantly brighter emission at early phases. The signal may cover up to a few hundred square arcmin on the sky and should be already detectable with current facilities by means of moderate/high resolution spectroscopy. The detection of this Ly-alpha emission can shed new light on the reionization history, the age and the emission properties of the highest-redshift QSOs. (abridged)

Sebastiano Cantalupo; Cristiano Porciani; Simon J. Lilly

2007-09-05T23:59:59.000Z

Note: This page contains sample records for the topic "horsepower change front" 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

Program on Technology Innovation: Small Torrefaction Plants Front End Engineering and Design  

Science Conference Proceedings (OSTI)

This report is produced under the EPRI Program on Technology Innovation, and analyzes the viability of developing small torrefaction plants, to be locally deployed close to biomass resource areas, to reduce logistic cost associated to hauling wet raw biomass long distances to large centralized facilities, for production of torrefied chips and pellets. Two plant sizes were selected for a Front Engineering and Design Analysis: 1) A 5/tons/hour product capacity and 2) a 2tons/hour product capacity. The torr...

2010-12-23T23:59:59.000Z

282

High-Level Synthesis of Analog Sensor Interface Front-Ends  

Science Conference Proceedings (OSTI)

In this paper we compare three different methodologies for analog high-level synthesis. Two optimization-based methods-one with simulations in the loop, the other with equations-and a library-based approach are discussed and illustrated with experimental ... Keywords: sensors, analog high-level synthesis, analog sensor interface front-ends, optimization-based methods, library-based approach, radiation detector interface ASIC

S. Donnay; G. Gielen; W. Sansen; W. Kruiskamp; D. Leenaerts; W. Van Bokhoven

1997-03-01T23:59:59.000Z

283

Away from the Range Front: Intra-Basin Geothermal Exploration Geothermal  

Open Energy Info (EERE)

Away from the Range Front: Intra-Basin Geothermal Exploration Geothermal Away from the Range Front: Intra-Basin Geothermal Exploration Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Away from the Range Front: Intra-Basin Geothermal Exploration Project Type / Topic 1 Recovery Act: Geothermal Technologies Program Project Type / Topic 2 Validation of Innovative Exploration Technologies Project Description The project applies the known relationship between fault permeability and the mechanics of rocks under stress to reduce risks in exploration well targeting. Although the concept has been applied before, the project would innovate by dramatically increasing the detail and types of information on the mechanical state of the target area using a variety of low-cost measurements in advance of deep drilling. In addition to the mechanical data, holes into the shallow warm aquifer related to the thermal anomaly will allow analysis of chemical indicators of upflow as a more direct measure of the location of fault permeability.

284

Delayed muons in extensive air showers and double-front showers  

Science Conference Proceedings (OSTI)

The results of a long-term experiment performed in the period between 1995 and 2006 with the aid of the MUON-T underground (20 mwe) scintillation facility arranged at the Tien Shan mountain research station at an altitude of 3340 m above sea level are presented. The time distribution of delayed muons with an energy in excess of 5 GeV in extensive air showers of energy not lower than 106 GeV with respect to the shower front was obtained with a high statistical significance in the delay interval between 30 and 150 ns. An effect of the geomagnetic field in detecting delayed muons in extensive air showers was discovered. This effect leads to the asymmetry of their appearance with respect to the north-south direction. The connection between delayed muons and extensive air showers featuring two fronts separated by a time interval of several tens of to two hundred nanoseconds is discussed. This connection gives sufficient grounds to assume that delayed muons originate from the decays of pions and kaons produced in the second, delayed, front of extensive air showers.

Beisembaev, R. U.; Vavilov, Yu. N., E-mail: yuvavil@mail.ru; Vildanov, N. G.; Kruglov, A. V.; Stepanov, A. V. [Russian Academy of Sciences, Lebedev Institute of Physics (Russian Federation); Takibaev, J. S. [Al-Farabi Kazakh National University (Kazakhstan)

2009-11-15T23:59:59.000Z

285

Thermomechanical analysis of high-heat-load components for the canted-undulator front end.  

SciTech Connect

With the canted undulators operating at 200 mA at closed gap at the Advanced Photon Source in the future, the front end will receive 20.4 kW of total power and 281 kW/mrad{sup 2} of peak power density. Thermal analysis of the front-end high-heat-load components becomes an essential part of the front-end design. An extensive study has been conducted on the thermal design of the photon shutters and fixed masks. A unique dog-bone-shaped cross-section design for the photon shutters was derived to relieve high stress in the corners. The dual-undulator x-ray beams were simulated at several locations on the fixed mask to ensure the worst possible case is considered. Stress analysis on the fixed mask revealed that the maximum stress occurs when beam hits the intersection between the horizontal surface and the corner surface. The details of the analysis procedure are presented, and the failure criteria are discussed.

Jaski, Y.; Trakhtenberg, E.; Collins, J.; Benson, C.; Brajuskovic, B.; Den Hartog, P.

2002-09-20T23:59:59.000Z

286

The Eastern United States Side-Door Cold Front of 22 April 1987: A Case Study of an Intense Atmospheric Density Current  

Science Conference Proceedings (OSTI)

A case study is presented of an unusual cold front that affected the east coast of the United States on 22 April 1987. Noteworthy aspects of this front are its genesis behind a preexisting back-door cold front its propagation to the southwest, ...

Gregory J. Hakim

1992-12-01T23:59:59.000Z

287

The Subpolar Front of the Japan/East Sea. Part II: Inverse Method for Determining the Frontal Vertical Circulation  

Science Conference Proceedings (OSTI)

An inverse method for inferring vertical velocities from high-resolution hydrographic/velocity surveys is formulated and applied to observations collected at the subpolar front of the Japan/East Sea (JES) taken during several cold-air outbreaks. ...

Leif N. Thomas; Craig M. Lee; Yutaka Yoshikawa

2010-01-01T23:59:59.000Z

288

Mapping and Monitoring Large-Scale Ocean Fronts Off the California Coast Using Imagery from the GOES-10 Geostationary Satellite  

E-Print Network (OSTI)

2002. New old frontier: ocean fronts (Editorial). Dyn.Atmos. Oceans 36:1–2. Bernstein, R.L. , L.C. Breaker, and R.satellite imagery of the oceans. IEEE Trans. Geosci. Remote

Breaker, Laurence C.; Mavor, Timothy P.; Broenkow, William W.

2005-01-01T23:59:59.000Z

289

A Nonclassical Cold Front Observed during COPS-91: Frontal Structure and the Process of Severe Storm Initiation  

Science Conference Proceedings (OSTI)

This case study addresses the issue of gravity current and bore development at surface cold fronts, and the role of these phenomena in the generation of severe frontal convection. The event investigated occurred on 27 April 1991 during the ...

Steven E. Koch; Wallace L. Clark

1999-08-01T23:59:59.000Z

290

The 12/13 January 1988 Narrow Cold-Frontal Rainband Observed during MFDP/FRONTS 87. Part II: Microphysics  

Science Conference Proceedings (OSTI)

The microphysics of a narrow cold-frontal rainband (NCFR) observed during the MFDP/FRONTS87 experiment is investigated by using a microphysical retrieval model. The equations of evolution of the water substance and of the temperature are solved ...

Virginie Marécal; Danièle Hauser; Frank Roux

1993-04-01T23:59:59.000Z

291

Relevance of Surface Energy Budget within Florida Sea-Breeze Front to Cross-Peninsula Rainwater Runoff Gradient  

Science Conference Proceedings (OSTI)

Analysis of surface latent heat flux measurements taken within the sea-breeze front of the coast of Florida during active thunderstorm periods demonstrates an important effect of the timing of coastal storms on the seasonal surface water budget. ...

Harry J. Cooper; Eric A. Smith; Michael T. Rubes

1998-09-01T23:59:59.000Z

292

The structure of a combustion front propagating in a fixed bed of crushed oil shale : co-current configuration.  

E-Print Network (OSTI)

??La propagation d'un front de combustion au sein d'un milieu poreux réactif met en œuvre des mécanismes thermiques, chimiques et de transfert, avec de forts… (more)

Ferreira Martins, Marcio

2008-01-01T23:59:59.000Z

293

The Influence of Sea Surface Temperature Gradients on Stratiform Cloudiness along the Equatorial Front in the Pacific Ocean  

Science Conference Proceedings (OSTI)

Satellite observations of visible cloudiness and sea surface temperature (SST) are used to test the hypothesis that the configuration of cool low-level winds blowing across a sharp SST front in the equatorial eastern Pacific gives rise to ...

Clara Deser; Susan Wahl; John J. Bates

1993-06-01T23:59:59.000Z

294

A comparison of automated methods of front recognition for climate studies – a case study in south west Western Australia  

Science Conference Proceedings (OSTI)

The identification of extratropical fronts in reanalyses and climate models is an important climate diagnostic that aids dynamical understanding and model verification. This study compares six frontal identification methods which are applied to ...

Pandora Hope; Kevin Keay; Michael Pook; Jennifer Catto; Ian Simmonds; Graham Mills; Peter McIntosh; James Risbey; Gareth Berry

295

Cold Air Damming by the Front Range of the Colorado Rockies and its Relationship to Locally Heavy Snows  

Science Conference Proceedings (OSTI)

Heavy snowstorms occur regularly along Colorado's Front Range and cause significant economic and human consequences for the urban corridor from Denver to Fort Collins. This paper examines one type of winter storm that displays great variability ...

Lawrence Dunn

1987-09-01T23:59:59.000Z

296

Modification of the Thermodynamic Structure of the Lower Troposphere by the Evaporation of Precipitation ahead of a Cold Front  

Science Conference Proceedings (OSTI)

The evolution of an oceanic prefrontal subcloud layer of continental origin was examined by analyzing data gathered on the subsynoptic and mesoscale during Phase III of the Australian Cold Fronts Research Program. Characteristics of the ...

B. F. Ryan; K. J. Wilson; E. J. Zipser

1989-01-01T23:59:59.000Z

297

Is a Cold Pool Necessary for the Maintenance of a Squall Line Produced by a Cold Front Aloft?  

Science Conference Proceedings (OSTI)

On 19–20 June 1979 a cyclone moved through the central United States. This cyclone contained a squall line associated with a cold front aloft (CFA), which caused significant damage. The fifth-generation Pennsylvania State University–NCAR ...

Mark T. Stoelinga; John D. Locatelli; Ralph D. Schwartz; Peter V. Hobbs

2003-01-01T23:59:59.000Z

298

Well-balanced bicharacteristic-based scheme for multilayer shallow water flows including wet/dry fronts  

Science Conference Proceedings (OSTI)

The aim of this paper is to present a new well-balanced finite volume scheme for two-dimensional multilayer shallow water flows including wet/dry fronts. The ideas, presented here for the two-layer model, can be generalized to a multilayer case in a ... Keywords: Bicharacteristics, Evolution galerkin, Finite volume method, Two-layer shallow water, Well-balance, Wet/dry front

M. Dudzinski; M. Luká?Ová-Medvid'Ová

2013-02-01T23:59:59.000Z

299

Change Log  

NLE Websites -- All DOE Office Websites (Extended Search)

Change Log Change Log Change Log NERSC-8 / Trinity Benchmarks Change Log 09/03/2013 Correction applied to MiniDFT web-page (to remove inconsistency with MiniDFT README). Capability Improvement measurements do not require 10,000 MPI ranks per k-point. 08/06/2013 Various pages have changed to remove "draft" status 08/02/2013 Correction added to FLOP Counts for "Small" Single-Node Miniapplication Tests page 07/12/2013 README files updated for IOR benchmark to correct an error in wording (no code changes); README file updated for osu-micro-benchmarks (OMB) changing the tests required and conditions including reinserting some tests that had been deleted earlier 07/05/2013 README updated for mpimemu benchmark; Revised version of benchmark results spreadsheet (linked on SSP web page);

300

Low temperature front surface passivation of interdigitated back contact silicon heterojunction solar cell  

DOE Green Energy (OSTI)

The interdigitated back contact silicon heterojunction (IBC-SHJ) solar cell requires a low temperature front surface passivation/anti-reflection structure. Conventional silicon surface passivation using SiO2 or a-SiNx is performed at temperature higher than 400°C, which is not suitable for the IBC-SHJ cell. In this paper, we propose a PECVD a-Si:H/a-SiNx:H/a-SiC:H stack structure to passivate the front surface of crystalline silicon at low temperature. The optical properties and passivation quality of this structure are characterized and solar cells using this structure are fabricated. With 2 nm a-Si:H layer, the stack structure exhibits stable passivation with effective minority carrier lifetime higher than 2 ms, and compatible with IBC-SHJ solar cell processing. A critical advantage of this structure is that the SiC allows it to be HF resistant, thus it can be deposited as the first step in the process. This protects the a-Si/c-Si interface and maintains a low surface recombination velocity.

Shu, Brent; Das, Ujjwal; Jani, Omkar; Hegedus, Steve; Birkmire, Robert

2009-06-08T23:59:59.000Z

Note: This page contains sample records for the topic "horsepower change front" 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

The SNS front-end, an injector for a high-power hydrogen-ion accelerator  

DOE Green Energy (OSTI)

The Spallation Neutron Source (SNS) will be an accelerator-based facility in Oak Ridge, TN, delivering pulsed neutron beams to experimenters. Negative hydrogen ion-beams are generated and pre-accelerated in a 2.5-MeV linac injector, or front end (FE), accelerated to 1 GeV energy by a linear accelerator system, converted into protons and accumulated in a ring accelerator, and then directed towards a mercury target to generate the neutrons. The proton beam arrives at the target in bursts of less than 1 {micro}s duration and with more than 1 MW average power. The front end has been built and commissioned by LBNL in Berkeley; shipment to ORNL is essentially complete. This paper provides an overview of FE major design features and experimental results obtained during the commissioning process. The SNS-FE can be viewed as a prototype of a high-current, high duty-factor injector for other accelerator projects or, without the elaborate MEBT, as an independent 2.5-MeV accelerator for various applications.

Keller, R.

2002-02-01T23:59:59.000Z

302

Statistical nature of cold fronts within the Gulf of Mexico and their potential influence on OTEC operations  

DOE Green Energy (OSTI)

This study was undertaken to quantify selected aspects of cold fronts as they penetrate southward into the Gulf of Mexico region. A need arises to statistically define the nature of these cold fronts since the Department of Energy's Ocean Thermal Energy Conversion (OTEC) program is geared for determining the feasibility of utilizing the temperature difference between the tropical ocean surface and depths of approximately 1500 m for the production of power. However, severe winters are known to significantly decrease the normal sea surface temperature by approximately 7.2/sup 0/F as well as cause deepening of the mixed layer (Leetmaa, 1977). With an OTEC plant operating at efficiencies of only 2 to 3 percent, the plant could become marginally operational during the winter months. Upon the passage of a cold front, the sea surface will exchange heat to the atmosphere through the fluxes of latent and sensible heat. Garstang (1969) has shown that these fluxes can increase more than an order of magnitude upon the passage of a moderate cold front. Long term, greater than 25 years, meteorological data from the National Climatic Center was used as the basis for determining the impact of cold fronts in the gulf of Mexico region. In particular, surface air temperature and wind direction were analyzed daily during the months of December, January, and February. The drop in temperature as well as the directional wind shift were the criteria for the frontal passage. Surface observation data from Tampa and Key West, Florida were used.

Ulanski, S.L.

1978-12-01T23:59:59.000Z

303

Visualization of research fronts and knowledge bases by three-dimensional areal densities of bibliographically coupled publications and co-citations  

Science Conference Proceedings (OSTI)

In this work the well known scientometric concepts of bibliographically coupled publications and co-cited references were applied to produce interactive maps of research fronts and knowledge bases of research fields. This article proposes a method and ... Keywords: 3D-visualisation, Battery research, Bibliographic coupling, Co-citation analysis, Emerging research fronts, Jaccard index, Knowledge bases, Local paper density, Research fronts, Science mapping, Similarity, Spatial density

Edgar Schiebel

2012-05-01T23:59:59.000Z

304

ANL/APS/TB-5 Functional Description of APS Beamline Front Ends  

NLE Websites -- All DOE Office Websites (Extended Search)

Functional Description of APS Beamline Front Ends by Tuncer Kuzay February 1993 Advanced Photon Source & Argonne National Laboratory, Argonne, Illinois 60439 o operated by The University of Chicago for the United States Department of Energy under Contract W-31-1 09-Eng-38 Argonne National Laboratory, with facilties in the states of Ilinois and Idaho, is owned by the United States government, and operated by The University of Chicago under the provisions of a contract with the Deparment of Energy. DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any waranty, express or implied, or assumes any legal liability or responsibility for the accuracy,

305

Dynamic stabilization of Rayleigh-Taylor instability in an ablation front  

Science Conference Proceedings (OSTI)

Dynamic stabilization of Rayleigh-Taylor instability in an ablation front is studied by considering a modulation in the acceleration that consists of sequences of Dirac deltas. This allows obtaining explicit analytical expressions for the instability growth rate as well as for the boundaries of the stability region. As a general rule, it is found that it is possible to stabilize all wave numbers above a certain minimum value k{sub m}, but the requirements in the modulation amplitude and frequency become more exigent with smaller k{sub m}. The essential role of compressibility is phenomenologically addressed in order to find the constraint it imposes on the stability region. The results for some different wave forms of the acceleration modulation are also presented.

Piriz, A. R.; Di Lucchio, L.; Rodriguez Prieto, G. [ETSI Industriales, Universidad de Castilla-La Mancha, 13071 Ciudad Real (Spain) and Instituto de Investigaciones Energeticas, 13071 Ciudad Real (Spain)

2011-01-15T23:59:59.000Z

306

On the ``massless gap`` adjustment of detected energy for passive material in front of a calorimeter  

SciTech Connect

I have designed a correction scheme for energy losses in passive material in front of a calorimeter based on the ``massless gap`` idea. I use a flexible geometry model of a calorimeter design for SDC outside of a solenoidal coil made of aluminium cylinders of adjustable thickness. The signal from the first radiation length of active calorimetry is scaled dependent on the incoming and observed energies of the shower. A reasonable recovery of the resolution of an unobstructed calorimeter is achieved using correction factors that depend only upon the total thickness of passive material. Thus a useful correction may be built into the hardware by increasing the amount of scintillator in the first radiation length of the active calorimeter. The distribution of correction factors determined event-by-event indicate that an additional dependence on the observed signal in the massless gap and total incident energy is clearly present.

Trost, H.J.

1992-01-31T23:59:59.000Z

307

On the massless gap'' adjustment of detected energy for passive material in front of a calorimeter  

SciTech Connect

I have designed a correction scheme for energy losses in passive material in front of a calorimeter based on the massless gap'' idea. I use a flexible geometry model of a calorimeter design for SDC outside of a solenoidal coil made of aluminium cylinders of adjustable thickness. The signal from the first radiation length of active calorimetry is scaled dependent on the incoming and observed energies of the shower. A reasonable recovery of the resolution of an unobstructed calorimeter is achieved using correction factors that depend only upon the total thickness of passive material. Thus a useful correction may be built into the hardware by increasing the amount of scintillator in the first radiation length of the active calorimeter. The distribution of correction factors determined event-by-event indicate that an additional dependence on the observed signal in the massless gap and total incident energy is clearly present.

Trost, H.J.

1992-01-31T23:59:59.000Z

308

Control of Beam Losses in the Front End for the Neutrino Factory  

Science Conference Proceedings (OSTI)

In the Neutrino Factory and Muon Collider, muons are produced by firing high energy protons onto a target to produce pions. The pions decay to muons which are then accelerated. This method of pion production results in significant background from protons and electrons, which may result in heat deposition on superconducting materials and activation of the machine preventing manual handling. In this paper we discuss the design of a secondary particle handling system. The system comprises a solenoidal chicane that filters high momentum particles, followed by a proton absorber that reduces the energy of all particles, resulting in the rejection of low energy protons that pass through the solenoid chicane. We detail the design and optimization of the system and its integration with the rest of the muon front end.

Neuffer, D.V.; /Fermilab; Snopok, P.; /IIT, Chicago; Rogers, C.T.; /Rutherford

2012-05-01T23:59:59.000Z

309

Prototype ATLAS IBL Modules using the FE-I4A Front-End Readout Chip  

E-Print Network (OSTI)

The ATLAS Collaboration will upgrade its semiconductor pixel tracking detector with a new Insertable B-layer (IBL) between the existing pixel detector and the vacuum pipe of the Large Hadron Collider. The extreme operating conditions at this location have necessitated the development of new radiation hard pixel sensor technologies and a new front-end readout chip, called the FE-I4. Planar pixel sensors and 3D pixel sensors have been investigated to equip this new pixel layer, and prototype modules using the FE-I4A have been fabricated and characterized using 120 GeV pions at the CERN SPS and 4 GeV positrons at DESY, before and after module irradiation. Beam test results are presented, including charge collection efficiency, tracking efficiency and charge sharing.

Albert, J; Alimonti, Gianluca; Allport, Phil; Altenheiner, Silke; Ancu, Lucian; Andreazza, Attilio; Arguin, Jean-Francois; Arutinov, David; Backhaus, Malte; Bagolini, Alvise; Ballansat, Jacques; Barbero, Marlon; Barbier, Gérard; Bates, Richard; Battistin, Michele; Baudin, Patrick; Beau, Tristan; Beccherle, Roberto; Beck, Hans Peter; Benoit, Mathieu; Bensinger, Jim; Bomben, Marco; Borri, Marcello; Boscardin, Maurizio; Botelho Direito, Jose Antonio; Bousson, Nicolas; Boyd, George Russell Jr; Breugnon, Patrick; Bruni, Graziano; Bruschi, Marco; Buchholz, Peter; Buttar, Craig; Cadoux, Franck; Calderini, Giovanni; Caminada, Leah; Capeans, Mar; Casse, Gianluigi; Catinaccio, Andrea; Cavalli-Sforza, Matteo; Chauveau, Jacques; Chu, Ming-Lee; Ciapetti, Marco; Cindro, Vladimir; Citterio, Mauro; Clark, Allan; Cobal, Marina; Coelli, Simone; Colijn, Auke-Pieter; Colin, Daly; Collot, Johann; Crespo-Lopez, Olivier; Dalla Betta, Gian-Franco; Darbo, Giovanni; DaVia, Cinzia; David, Pierre-Yves; Debieux, Stéphane; Delebecque, Pierre; Devetak, Erik; DeWilde, Burton; Di Girolamo, Beniamino; Dinu, Nicoleta; Dittus, Fridolin; Diyakov, Denis; Djama, Fares; Dobos, Daniel Adam; Doonan, Kate; Dopke, Jens; Dorholt, Ole; Dube, Sourabh; Dushkin, Andrey; Dzahini, Daniel; Egorov, Kirill; Ehrmann, Oswin; Elldge, David; Elles, Sabine; Elsing, Markus; Eraud, Ludovic; Ereditato, Antonio; Eyring, Andreas; Falchieri, Davide; Falou, Aboud; Fang, Xiaochao; Fausten, Camille; Favre, Yannick; Ferrere, Didier; Fleta, Celeste; Fleury, Julien; Flick, Tobias; Forshaw, Dean; Fougeron, Denis; Fritzsch, Thomas; Gabrielli, Alessandro; Gaglione, Renaud; Gallrapp, Christian; Gan, K; Garcia-Sciveres, Maurice; Gariano, Giuseppe; Gastaldi, Thibaut; Gemme, Claudia; Gensolen, Fabrice; George, Matthias; Ghislain, Patrick; Giacomini, Gabriele; Gibson, Stephen; Giordani, Mario Paolo; Giugni, Danilo; Gjersdal, Håvard; Glitza, Karl Walter; Gnani, Dario; Godlewski, Jan; Gonella, Laura; Gorelov, Igor; Gorišek, Andrej; Gössling, Claus; Grancagnolo, Sergio; Gray, Heather; Gregor, Ingrid-Maria; Grenier, Philippe; Grinstein, Sebastian; Gromov, Vladimir; Grondin, Denis; Grosse-Knetter, Jörn; Hansen, Thor-Erik; Hansson, Per; Harb, Ali; Hartman, Neal; Hasi, Jasmine; Hegner, Franziska; Heim, Timon; Heinemann, Beate; Hemperek, Tomasz; Hessey, Nigel; Hetmánek, Martin; Hoeferkamp, Martin; Hostachy, Jean-Yves; Hügging, Fabian; Husi, Coralie; Iacobucci, Giuseppe; Idarraga, John; Ikegami, Yoichi; Janoška, Zdenko; Jansen, Jens; Jansen, Luc; Jensen, Frank; Jentzsch, Jennifer; Joseph, John; Kagan, Harris; Karagounis, Michael; Kass, Richard; Kenney, Christopher J; Kersten, Susanne; Kind, Peter; Klingenberg, Reiner; Kluit, Ruud; Kocian, Martin; Koffeman, Els; Kok, Angela; Korchak, Oleksandr; Korolkov, Ilya; Kostyukhin, Vadim; Krieger, Nina; Krüger, Hans; Kruth, Andre; Kugel, Andreas; Kuykendall, William; La Rosa, Alessandro; Lai, Chung-Hang; Lantzsch, Kerstin; Laporte, Didier; Lapsien, Tobias; Lounis, abdenour; Lozano, Manuel; Lu, Yunpeng; Lubatti, Henry; Macchiolo, Anna; Mallik, Usha; Mandi?, Igor; Marchand, Denis; Marchiori, Giovanni; Massol, Nicolas; Matthias, Wittgen; Mättig, Peter; Mekkaoui, Abderrazak; Menouni, Mohsine; Menu, Johann; Meroni, Chiara; Mesa, Javier; Micelli, Andrea; Michal, Sébastien; Miglioranzi, Silvia; Mikuž, Marko; Mitsui, Shingo; Monti, Mauro; Moore, J; Morettini, Paolo; Muenstermann, Daniel; Murray, Peyton; Nellist, Clara; Nelson, David J; Nessi, Marzio; Neumann, Manuel; Nisius, Richard; Nordberg, Markus; Nuiry, Francois-Xavier; Oppermann, Hermann; Oriunno, Marco; Padilla, Cristobal; Parker, Sherwood; Pellegrini, Giulio; Pelleriti, Gabriel; Pernegger, Heinz; Piacquadio, Nicola Giacinto; Picazio, Attilio; Pohl, David; Polini, Alessandro; Popule, Ji?í; Portell Bueso, Xavier; Povoli, Marco; Puldon, David; Pylypchenko, Yuriy; Quadt, Arnulf; Quirion, David; Ragusa, Francesco; Rambure, Thibaut; Richards, Erik; Ristic, Branislav; Røhne, Ole; Rothermund, Mario; Rovani, Alessandro; Rozanov, Alexandre; Rubinskiy, Igor; Rudolph, Matthew Scott; Rummler, André; Ruscino, Ettore; Salek, David; Salzburger, Andreas; Sandaker, Heidi; Schipper, Jan-David; Schneider, Basil; Schorlemmer, Andre; Schroer, Nicolai; Schwemling, Philippe; Seidel, Sally; Seiden, Abraham; Šícho, Petr; Skubic, Patrick; Sloboda, Michal; Smith, D; Sood, Alex; Spencer, Edwin; Strang, Michael; Stugu, Bjarne; Stupak, John; Su, Dong; Takubo, Yosuke; Tassan, Jean; Teng, Ping-Kun; Terada, Susumu; Todorov, Theodore; Tomášek, Michal; Toms, Konstantin; Travaglini, Riccardo; Trischuk, William; Troncon, Clara; Troska, Georg

2012-01-01T23:59:59.000Z

310

The first photon shutter development for APS insertion device beamline front ends  

Science Conference Proceedings (OSTI)

One of the most critical components on the Advanced Photon Source (APS) insertion device (ID) beamline front ends is the first photon shutter. It operates in two modes to fully intercept the high total power and high-heat flux ID photon beam in seconds (normal mode) or in less than 100 ms (emergency fast mode). It is designed to operate in ultra high vacuum (UHV). The design incorporates a multi-channel rectangular bar, bent in a ``hockey stick`` configuration, with two-point suspension. The flanged end is an articulated bellows with rolling hinges. The actuation end is a spring-assisted, pneumatic fail-safe flexural pivot type. The coolant (water) channels incorporate brazed copper foam to enhance the heat transfer, a tube technology particular to the APS. The design development, and material aspects, as well as the extensive thermal and vibrational analyses in support of the design, are presented in this paper.

Shu, Deming; Nian, H.L.T.; Wang, Zhibi; Collins, J.T.; Ryding, D.G.; Kuzay, T.M.

1992-09-01T23:59:59.000Z

311

The first photon shutter development for APS insertion device beamline front ends  

Science Conference Proceedings (OSTI)

One of the most critical components on the Advanced Photon Source (APS) insertion device (ID) beamline front ends is the first photon shutter. It operates in two modes to fully intercept the high total power and high-heat flux ID photon beam in seconds (normal mode) or in less than 100 ms (emergency fast mode). It is designed to operate in ultra high vacuum (UHV). The design incorporates a multi-channel rectangular bar, bent in a hockey stick'' configuration, with two-point suspension. The flanged end is an articulated bellows with rolling hinges. The actuation end is a spring-assisted, pneumatic fail-safe flexural pivot type. The coolant (water) channels incorporate brazed copper foam to enhance the heat transfer, a tube technology particular to the APS. The design development, and material aspects, as well as the extensive thermal and vibrational analyses in support of the design, are presented in this paper.

Shu, Deming; Nian, H.L.T.; Wang, Zhibi; Collins, J.T.; Ryding, D.G.; Kuzay, T.M.

1992-01-01T23:59:59.000Z

312

$|V_{ub}|$ and $B\\to\\eta^{(')}$ Form Factors in Covariant Light Front Approach  

E-Print Network (OSTI)

We study $B\\to (\\pi, \\eta, \\eta')$ transition form factors in the framework of covariant light front approach. With the theoretical uncertainties, we find that $B\\to (\\pi, \\eta, \\eta')$ form factors at $q^2=0$ are $f^{(\\pi, \\eta, \\eta')}_{+}(0)=(0.245^{+0.000}_{-0.001}\\pm 0.011, 0.220 \\pm 0.009\\pm0.009, 0.180\\pm 0.008^{+0.008}_{-0.007})$ for vector current and $f^{(\\pi, \\eta, \\eta')}_{T}(0)=(0.239^{+0.002+0.020}_{-0.003-0.018}, 0.211\\pm 0.009^{+0.017}_{-0.015}, 0.173\\pm 0.007^{+0.014}_{-0.013})$ for tensor current, respectively. With the obtained $q^2$-dependent $f^{\\pi}_{+}(q^2)$ and observed branching ratio (BR) for $\\bar B_d\\to \\pi^+ \\ell \\bar \

Chen, Chuan-Hung; Wang, Wei

2009-01-01T23:59:59.000Z

313

Scintillation counter and wire chamber front end modules for high energy physics experiments  

SciTech Connect

This document describes two front-end modules developed for the proposed MIPP upgrade (P-960) experiment at Fermilab. The scintillation counter module was developed for the Plastic Ball detector time and charge measurements. The module has eight LEMO 00 input connectors terminated with 50 ohms and accepts negative photomultiplier signals in the range 0.25...1000 pC with the maximum input voltage of 4.0 V. Each input has a passive splitter with integration and differentiation times of {approx}20 ns. The integrated portion of the signal is digitized at 26.55 MHz by Analog Devices AD9229 12-bit pipelined 4-channel ADC. The differentiated signal is discriminated for time measurement and sent to one of the four TMC304 inputs. The 4-channel TMC304 chip allows high precision time measurement of rising and falling edges with {approx}100 ps resolution and has internal digital pipeline. The ADC data is also pipelined which allows deadtime-less operation with trigger decision times of {approx}4 {micro}s. The wire chamber module was developed for MIPP EMCal detector charge measurements. The 32-channel digitizer accepts differential analog signals from four 8-channel integrating wire amplifiers. The connection between wire amplifier and digitizer is provided via 26-wire twist-n-flat cable. The wire amplifier integrates input wire current and has sensitivity of 275 mV/pC and the noise level of {approx}0.013 pC. The digitizer uses the same 12-bit AD9229 ADC chip as the scintillator counter module. The wire amplifier has a built-in test pulser with a mask register to provide testing of the individual channels. Both modules are implemented as a 6Ux220 mm VME size board with 48-pin power connector. A custom europack (VME) 21-slot crate is developed for housing these front-end modules.

Baldin, Boris; DalMonte, Lou; /Fermilab

2011-01-01T23:59:59.000Z

314

Chandra Observation of MS 1455.0+2232: cold fronts in a massive cooling flow cluster?  

E-Print Network (OSTI)

We present the Chandra observation of the cluster of galaxies MS 1455.0+2232. From previous ASCA and ROSAT observations, this cluster was identified as a ``relaxed'' cluster that hosts one of the most massive cooling flows detected. With higher angular resolution, the Chandra X-ray image shows the presence of two surface brightness edges on opposite sides of the X-ray peak: the first at 190 kpc to the north and the second at 450 kpc to the south. Even though the low exposure of this observation limits our ability to constrain the temperature jump across both edges, we show that the northern edge is likely to be a ``cold front'' similar to others observed recently by Chandra in the clusters A2142, A3667, RX J1720.1+2638, and A2256. The observed cold front is most likely produced by the motion, from south to north, of a group-size dark matter halo. The most natural explanation for the presence of this observed moving subclump is that MS 1455.0+2232 is a merger cluster in the very last stage before it becomes fully relaxed. This scenario, however, appears to be unlikely as the cluster shows no further sign of ongoing merger. Moreover, it is not clear if a massive cooling flow could have survived this kind of merger. We propose an alternative scenario in which, as for RX J1720.1+2638, MS 1455.0+2232 is the result of the hierarchical collapse of two co-located density perturbations, the first a group-scale perturbation collapse followed by a second cluster-scale perturbation collapse that surrounded, but did not destroy, the first. We suggest that a cooling flow may have begun inside the already collapsed group-scale perturbation and may have been later amplified by the gas compression induced by the infall of the overlying main cluster mass.

P. Mazzotta; M. Markevitch; W. R. Forman; C. Jones; A. Vikhlinin; L. VanSpeybroeck

2001-08-29T23:59:59.000Z

315

Lei Chang  

NLE Websites -- All DOE Office Websites (Extended Search)

Ph.D. in Theoretical Physics, Peking University, Beijing, China. Selected Recent Articles Phase diagram and critical endpoint for strongly-interacting quarks Si-xue Qin, Lei Chang,...

316

2013Chang  

Science Conference Proceedings (OSTI)

FOR IMMEDIATE RELEASE March 12, 2013 AOCS Announces 2013 Stephen S. Change Award Recipient AOCS is proud to announce that Alejandro G. Marangoni, Professor and Tier I Canada Research Chair Food, Health and Agin

317

A Cold Frontal Rainband Observed during the LANDES-FRONTS 84 Experiment: Mesoscale and Small-Scale Structure Inferred from Dual-Doppler Radar Analysis.  

Science Conference Proceedings (OSTI)

This paper presents the kinematic structure of a cold frontal rainband associated with a secondary cold front which moved over southwest of France on 4 June 1984.

Y. Lemaitre; G. Scialom; P. Amayenc

1989-07-01T23:59:59.000Z

318

CAST STONE OXIDATION FRONT EVALUATION: PRELIMINARY RESULTS FOR SAMPLES EXPOSED TO MOIST AIR  

Science Conference Proceedings (OSTI)

The rate of oxidation is important to the long-term performance of reducing salt waste forms because the solubility of some contaminants, e.g., technetium, is a function of oxidation state. TcO{sub 4}{sup ?} in the salt solution is reduced to Tc(IV) and has been shown to react with ingredients in the waste form to precipitate low solubility sulfide and/or oxide phases. Upon exposure to oxygen, the compounds containing Tc(IV) oxidize to the pertechnetate ion, Tc(VII)O{sub 4}{sup ?}, which is very soluble. Consequently the rate of technetium oxidation front advancement into a monolith and the technetium leaching profile as a function of depth from an exposed surface are important to waste form performance and ground water concentration predictions. An approach for measuring contaminant oxidation rate (effective contaminant specific oxidation rate) based on leaching of select contaminants of concern is described in this report. In addition, the relationship between reduction capacity and contaminant oxidation is addressed. Chromate (Cr(VI) was used as a non-radioactive surrogate for pertechnetate, Tc(VII), in Cast Stone samples prepared with 5 M Simulant. Cast Stone spiked with pertechnetate was also prepared and tested. Depth discrete subsamples spiked with Cr were cut from Cast Stone exposed to Savannah River Site (SRS) outdoor ambient temperature fluctuations and moist air. Depth discrete subsamples spiked with Tc-99 were cut from Cast Stone exposed to laboratory ambient temperature fluctuations and moist air. Similar conditions are expected to be encountered in the Cast Stone curing container. The leachability of Cr and Tc-99 and the reduction capacities, measured by the Angus-Glasser method, were determined for each subsample as a function of depth from the exposed surface. The results obtained to date were focused on continued method development and are preliminary and apply to the sample composition and curing / exposure conditions described in this report. • The Cr oxidation front (depth to which soluble Cr was detected) for the Cast Stone sample exposed for 68 days to ambient outdoor temperatures and humid air (total age of sample was 131 days) was determined to be about 35 mm below the top sample surface exposed. The Tc oxidation front, depth at which Tc was insoluble, was not determined. Interpretation of the results indicates that the oxidation front is at least 38 mm below the exposed surface. The sample used for this measurement was exposed to ambient laboratory conditions and humid air for 50 days. The total age of the sample was 98 days. • Technetium appears to be more easily oxidized than Cr in the Cast Stone matrix. The oxidized forms of Tc and Cr are soluble and therefore leachable. Longer exposure times are required for both the Cr and Tc spiked samples to better interpret the rate of oxidation. Tc spiked subsamples need to be taken further from the exposed surface to better define and interpret the leachable Tc profile. • Finally Tc(VII) reduction to Tc(IV) appears to occur relatively fast. Results demonstrated that about 95 percent of the Tc(VII) was reduced to Tc(IV) during the setting and very early stage setting for a Cast Stone sample cured 10 days. Additional testing at longer curing times is required to determine whether additional time is required to reduce 100 % of the Tc(VII) in Cast Stone or whether the Tc loading exceeded the ability of the waste form to reduce 100 % of the Tc(VII). Additional testing is required for samples cured for longer times. Depth discrete subsampling in a nitrogen glove box is also required to determine whether the 5 percent Tc extracted from the subsamples was the result of the sampling process which took place in air. Reduction capacity measurements (per the Angus-Glasser method) performed on depth discrete samples could not be correlated with the amount of chromium or technetium leached from the depth discrete subsamples or with the oxidation front inferred from soluble chromium and technetium (i.e., effective Cr and Tc oxidation fronts). Residual reduct

Langton, C.

2013-11-26T23:59:59.000Z

319

FL44CH17-Chang ARI 18 October 2011 18:22 Nanoscale Electrokinetics  

E-Print Network (OSTI)

, depletion front, rectification Abstract When a direct current (DC) electric field is applied across an ion and Microvortices: How Microhydrodynamics Affects Nanofluidic Ion Flux Hsueh-Chia Chang,1 Gilad Yossifon,2 0066-4189/12/0115-0401$20.00 Keywords overlimiting current, nanoslot ion current, extended polarization

Chang, Hsueh-Chia

320

Air–Sea Heat Exchange along the Northern Sea Surface Temperature Front in the Eastern Tropical Pacific  

Science Conference Proceedings (OSTI)

The atmospheric response to the oceanic forcing in the eastern Pacific along the northern equatorial sea surface temperature (SST) front is investigated in terms of sensible and latent heat flux during the 6-month period from 28 July 1999 to 27 ...

Nicolai Thum; Steven K. Esbensen; Dudley B. Chelton; Michael J. McPhaden

2002-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "horsepower change front" 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

PHYSICAL REVIEW E 84, 036104 (2011) Average crack-front velocity during subcritical fracture propagation in a heterogeneous medium  

E-Print Network (OSTI)

stress corrosion, diffusion, dissolution, and plasticity [1,5]. Several experimental empirical relations results in an increase in the speed of crack growth. A weak stress-sensitive regime follows wherePHYSICAL REVIEW E 84, 036104 (2011) Average crack-front velocity during subcritical fracture

Schmittbuhl, Jean

322

ICPIG, July 15-20, 2007, Prague, Czech Republi Negative streamer fronts: comparison of particle and fluid models and  

E-Print Network (OSTI)

. This front region is also important for the generation of high energy electrons in streamer and leader. Fluid model The fluid model approximates the average dynamics of the local electrons as local densitiesV is the ionization energy. Panel (d) zooms into panel (c), both in space and in densities. Both fluid and particle

Ebert, Ute

323

Wind and Thermodynamic Retrieval from Single-Doppler Measurements of a Gust Front Observed during Phoenix II  

Science Conference Proceedings (OSTI)

The adjoint method to retrieve the three-dimensional wind and thermodynamic fields is applied to single-Doppler observations of a gust front measured during the Phoenix II experiment. This method uses a fluid dynamics model and its adjoint, and ...

Juanzhen Sun; Andrew Crook

1994-06-01T23:59:59.000Z

324

Temperature activated absorption during laser-induced damage: The evolution of laser-supported solid-state absorption fronts  

SciTech Connect

Previously we have shown that the size of laser induced damage sites in both KDP and SiO{sub 2} is largely governed by the duration of the laser pulse which creates them. Here we present a model based on experiment and simulation that accounts for this behavior. Specifically, we show that solid-state laser-supported absorption fronts are generated during a damage event and that these fronts propagate at constant velocities for laser intensities up to 4 GW/cm{sup 2}. It is the constant absorption front velocity that leads to the dependence of laser damage site size on pulse duration. We show that these absorption fronts are driven principally by the temperature-activated deep sub band-gap optical absorptivity, free electron transport, and thermal diffusion in defect-free silica for temperatures up to 15,000K and pressures < 15GPa. In addition to the practical application of selecting an optimal laser for pre-initiation of large aperture optics, this work serves as a platform for understanding general laser-matter interactions in dielectrics under a variety of conditions.

Carr, C W; Bude, J D; Shen, N; Demange, P

2010-10-26T23:59:59.000Z

325

Journal of Statistical Physics, Vol. 90, Nos. 5/6, 1998 We study the nucleation and growth of flame fronts in slow combustion. This  

E-Print Network (OSTI)

fronts in slow combustion. This is modeled by a set of reaction-diffusion equations for the temperature: Nucleation; reaction-diffusion systems; flame fronts. Nucleation, Growth, and Scaling in Slow Combustion applied to understand some aspects of slow combustion. We use a phase-field model of two coupled reaction

Grant, Martin

326

A Case Study of Coupling between Low- and Upper-Level Jet–Front Systems: Investigation of Dynamical and Diabatic Processes  

Science Conference Proceedings (OSTI)

An example of coupling between an upper-level and a low-level jet–front system is analyzed using the mesoscale hydrostatic model SALSA. The case study chosen is the cold front sampled during the intensive observation period 2 of the Mesoscale ...

Jean-Luc Sortais; Jean-Pierre Cammas; Xiao Ding Yu; Evelyne Richard; Robert Rosset

1993-08-01T23:59:59.000Z

327

An Observation of Frontal Wave Development on a Shelf-Slope/Warm Core Ring Front Near the Shelf Break South of New England  

Science Conference Proceedings (OSTI)

Small-scale waves have been observed near 40°N, 68°30?W in specially enhanced satellite imagery of a strong temperature front formed in May 1979, between the shelf/slope-water front and warm core ring 79-B. Thew frontal waves had a wavelength of ...

S. R. Ramp; R. C. Beardsley; R. Legeckis

1983-05-01T23:59:59.000Z

328

Structure and Evolution of Winter Cyclones in the Central United States and Their Effects on the Distribution of Precipitation. Part II: Arctic Fronts  

Science Conference Proceedings (OSTI)

The structure and evolution of a shallow but intense cold front (commonly referred to as an arctic front) and its associated precipitation features that passed through the central United States from 0000 UTC 9 March to 0000 UTC 10 March 1992 are ...

Peng-Yun Wang; Jonathan E. Martin; John D. Locatelli; Peter V. Hobbs

1995-05-01T23:59:59.000Z

329

Impacts of a Supersonic Shock Front on Star Formation in the Bullet Cluster  

E-Print Network (OSTI)

We use the Bullet Cluster (1E0657-56) to investigate the extent to which star formation in cluster galaxies is influenced by ram pressure from supersonic gas (Mach 3) during a cluster merger. While the effects of ram pressure have been studied for individual galaxies infalling into galaxy clusters, this system provides a unique opportunity to investigate the impact of dramatic merger events on the cluster galaxy population. In this analysis we use {\\it Spitzer} IRAC data to study star formation. At the redshift of the cluster the 6.2 $\\mu$m PAH feature is redshifted into the 8 $\\mu$m band, enabling use of the m$_{4.5}$-m$_{8}$ color as a proxy for specific star formation rate. We find that the color distribution on the two sides of the shock differ by less than 2$\\sigma$, and conclude that ram pressure from the shock front has no dramatic, immediate impact on the star formation of cluster galaxies in the Bullet Cluster.

Sun Mi Chung; Anthony H. Gonzalez; Douglas Clowe; Dennis Zaritsky; Maxim Markevitch; Christine Jones

2008-10-07T23:59:59.000Z

330

Impacts of a Supersonic Shock Front on Star Formation in the Bullet Cluster  

E-Print Network (OSTI)

We use the Bullet Cluster (1E0657-56) to investigate the extent to which star formation in cluster galaxies is influenced by ram pressure from supersonic gas (Mach 3) during a cluster merger. While the effects of ram pressure have been studied for individual galaxies infalling into galaxy clusters, this system provides a unique opportunity to investigate the impact of dramatic merger events on the cluster galaxy population. In this analysis we use {\\it Spitzer} IRAC data to study star formation. At the redshift of the cluster the 6.2 $\\mu$m PAH feature is redshifted into the 8 $\\mu$m band, enabling use of the m$_{4.5}$-m$_{8}$ color as a proxy for specific star formation rate. We find that the color distribution on the two sides of the shock differ by less than 2$\\sigma$, and conclude that ram pressure from the shock front has no dramatic, immediate impact on the star formation of cluster galaxies in the Bullet Cluster.

Chung, Sun Mi; Clowe, Douglas; Zaritsky, Dennis; Markevitch, Maxim; Jones, Christine

2008-01-01T23:59:59.000Z

331

Plans for an Integrated Front-End Test Stand at the Spallation Neutron Source  

SciTech Connect

A spare Radio-Frequency Quadrupole (RFQ) is presently being fabricated by industry with delivery to Oak Ridge National Laboratory planned in late 2012. The establishment of a test stand at the Spallation Neutron Source site is underway so that complete acceptance testing can be performed during the winter of 2012-2013. This activity is the first step in the establishment of an integrated front-end test stand that will include an ion source, low-energy beam transport (LEBT), RFQ, medium-energy beam transport, diagnostics, and a beam dump. The test stand will be capable of delivering an H- ion beam of up to 50 mA with a pulse length of 1 ms and a repetition rate of 60 Hz or a proton beam of up to 50 mA, 100us, 1Hz. The test stand will enable the following activities: complete ion source characterization; development of a magnetic LEBT chopper; development of a two-source layout; development of beam diagnostics; and study of beam dynamics of high intensity beam.

Champion, Mark S [ORNL; Aleksandrov, Alexander V [ORNL; Crofford, Mark T [ORNL; Heidenreich, Dale A [ORNL; Kang, Yoon W [ORNL; Moss, John [ORNL; Roseberry, Jr., R Tom [ORNL; Schubert, James Phillip [ORNL

2012-01-01T23:59:59.000Z

332

AB-Net Method of Protection from Projectiles (city, military base, battle-front, etc.)  

E-Print Network (OSTI)

The author suggests a low cost special AB-Net from artificial fiber, which may protect cities and important objects from rockets, artillery and mortar shells, projectiles, bullets, and strategic weapons. The idea is as follows: The offered AB-Net joins an incoming projectile to a small braking parachute and this incoming projectile loses speed by air braking after a drag distance of 50 - 150 meters. A following interception net after the first may serve to collect the slowed projectiles and their fragments or bomblets so that they do not reach the aimpoint. The author offers the design of AB-Net, a developed theory of snagging with a small braking parachute by AB-Net; and sample computations. These nets may be used for defense of a town, city, military base, battle-front line, road (from terrorists), or any important objects or installations (for example nuclear electric station, government buildings, etc.). Computed projects are: Net to counter small rockets (for example, from Qassam), net to counter artillery projectile (caliber 76 mm), net to counter bullets (caliber 7.6 mm). The offered method is cheaper by thousands of times than protection of a city by current anti-rocket systems. Discussion and results are at the end of the article. Key words: Protection from missile and projectile weapons, mortar, rocket, AB-Net, Qassam defense, incoming defense, armor.

Alexander Bolonkin

2008-02-13T23:59:59.000Z

333

Magnetic field effects on the thermonuclear combustion front of Chandrasekhar mass white dwarfs  

E-Print Network (OSTI)

The explosion of a type Ia supernova starts in a white dwarf as a laminar deflagration at the center of the star and soon several hydrodynamic instabilities, in particular, the Rayleigh-Taylor instability, begin to act. A cellular stationary combustion and a turbulent combustion regime are rapidly achieved by the flame and maintained up to the end of the so-called flamelet regime when the transition to detonation is believed to occur. The burning velocity at these regimes is well described by the fractal model of combustion. Using a semi-analytic approach, we describe the effect of magnetic fields on the fractalization of the front considering a white dwarf with a nearly dipolar magnetic field. We find an intrinsic asymmetry on the velocity field that may be maintained up to the free expansion phase of the remnant. Considering the strongest values inferred for a white dwarf's magnetic fields with strengths up to $10^{8}-10^{9}$ G at the surface and assuming that the field near the centre is roughly 10 times greater, asymmetries in the velocity field higher than $10-20 %$ are produced between the magnetic polar and the equatorial axis of the remnant which may be related to the asymmetries found from recent spectropolarimetric observations of very young SN Ia remnants. Dependence of the asymmetry with white dwarf composition is also analyzed.

Cristian R. Ghezzi; Elisabete M. de Gouveia Dal Pino; Jorge E. Horvath

2000-12-06T23:59:59.000Z

334

Application of an atmospheric dispersion model to simulated pollutant releases in the Colorado Front range  

SciTech Connect

The 1991 ASCOT (Atmospheric Studies in Complex Terrain) field study in the vicinity of the Department of Energy`s Rocky Flats Plant, Colorado, was conducted to study the local and regional circulations and their interactions with synoptic flows over the complex terrain of the Rocky Mountains Colorado Front range. The study was combined with the Rocky Flats Winter validation Study (WVS) which had similar objectives. Tracer plumes were released as part of this field campaign over the period of February 3--19, 1991 from the Rocky Flats Plant. Twelve intensive experiments, centered around eleven-hour long surface releases of sulfur hexafloride (SF{sub 6})tracer material, were conducted by teams from a number of national laboratories, government agencies and private contractors. One-hourly averaged tracer concentrations were collected from approximately 170 surface samplers deployed along two concentric circles at a radius of 8 km and 16 km from the release location. The concentration patterns resulting from the transport and turbulent diffusion of the SF{sub 6} traces plumes within the atmospheric boundary layer during two night-time, one morning transition, and one day-time period were simulated for this paper. The scenarios selected represent the first-choice of all twelve experiments to be addressed, based on the quality and completeness of the collected data base and the presence of the desired meteorological conditions.

Lange, R.

1993-05-01T23:59:59.000Z

335

AB-Net Method of Protection from Projectiles (city, military base, battle-front, etc.)  

E-Print Network (OSTI)

The author suggests a low cost special AB-Net from artificial fiber, which may protect cities and important objects from rockets, artillery and mortar shells, projectiles, bullets, and strategic weapons. The idea is as follows: The offered AB-Net joins an incoming projectile to a small braking parachute and this incoming projectile loses speed by air braking after a drag distance of 50 - 150 meters. A following interception net after the first may serve to collect the slowed projectiles and their fragments or bomblets so that they do not reach the aimpoint. The author offers the design of AB-Net, a developed theory of snagging with a small braking parachute by AB-Net; and sample computations. These nets may be used for defense of a town, city, military base, battle-front line, road (from terrorists), or any important objects or installations (for example nuclear electric station, government buildings, etc.). Computed projects are: Net to counter small rockets (for example, from Qassam), net to counter artille...

Bolonkin, Alexander

2008-01-01T23:59:59.000Z

336

Climatic Change  

E-Print Network (OSTI)

Carbon dioxide (CO2) sequestration has been proposed as a key component in technological portfolios for managing anthropogenic climate change, since it may provide a faster and cheaper route to significant reductions in atmospheric CO2 concentrations than abating CO2 production. However, CO2 sequestration is not a perfect substitute for CO2 abatement because CO2 may leak back into the atmosphere (thus imposing future climate change impacts) and because CO2 sequestration requires energy (thus producing more CO2 and depleting fossil fuel resources earlier). Here we use analytical and numerical models to assess the economic efficiency of CO2 sequestration and analyze the optimal timing and extent of CO2 sequestration. The economic efficiency factor of CO2 sequestration can be expressed as the ratio of the marginal net benefits of sequestering CO2 and avoiding CO2 emissions. We derive an analytical solution for this efficiency factor for a simplified case in which we account for CO2 leakage, discounting, the additional fossil fuel requirement of CO2 sequestration, and the growth rate of carbon taxes. In this analytical model, the economic efficiency of CO2 sequestration decreases as the CO2 tax growth rate, leakage rates and energy requirements for CO2 sequestration increase.

Klaus Keller; David Mcinerney; David F. Bradford

2007-01-01T23:59:59.000Z

337

2009 VW Jetta TDI Test Cell Location Front Vehicle Setup Information  

NLE Websites -- All DOE Office Websites (Extended Search)

VW Jetta TDI VW Jetta TDI Test Cell Location Front Vehicle Setup Information Downloadable Dynamometer Database (D 3 )- Test Summary Sheet Vehicle Architecture Conventional- Diesel Vehicle Dynamometer Input Document Date 8/7/2013 Advanced Powertrain Research Facility Test weight [lb] Target A [lb] 3625 35 Target B [lb/mph] Target C [lb/mph^2] 0.18 0.0193 Revision Number 3 Notes: Test Fuel Information Fuel type 2007 Certification Diesel Fuel density [g/ml] Fuel Net HV [BTU/lbm] 0.855 18355 T e s t I D [ # ] C y c l e C o l d s t a r t ( C S t ) H o t s t a r t [ H S t ] D a t e T e s t C e l l T e m p [ C ] T e s t C e l l R H [ % ] T e s t C e l l B a r o [ i n / H g ] V e h i c l e c o o l i n g f a n s p e e d : S p e e d M a t c h [ S M ] o r c o n s t a n t s p e e d [ C S ] S o l a r L a m p s [ W / m 2 ] V e i c l e C l i m a t e C o n t r o l s e t t i n g s H o o d P o s i t i o n [ U p ] o r [ C l o s e d ] W i n d o w P o s i t i o n [ C l o s e d ] o r [ D o w n ] C y c l e D i s t a n c e

338

The Effect of Heterogeneity on In-Situ Combustion: The Propagation of Combustion Fronts in Layered Porous Media  

SciTech Connect

This report extend the approach to heterogeneous systems, by considering the simpler case of in-situ combustion in layered porous media (and particularly to a two-layer model). Analytical models were developed to delineate the combined elects of fluid flow, reaction and heat transfer on the dynamics of combustion fronts in layered porous media, using as parameters the thermal coupling between the layers, the heat transfer to the surroundings and the permeability contrast.

Akkutlu, I. Yucel; Yortsos, Yanis C.

2002-06-11T23:59:59.000Z

339

Developing front-end Web 2.0 technologies to access services, content and things in the future Internet  

Science Conference Proceedings (OSTI)

The future Internet is expected to be composed of a mesh of interoperable web services accessible from all over the web. This approach has not yet caught on since global user-service interaction is still an open issue. This paper states one vision with ... Keywords: Context, Future Internet, Internet of services, SOA, Service front-ends, User-service interaction, Web 2.0

Juan Alfonso Lara; David Lizcano; MaríA Aurora MartíNez; Juan Pazos

2013-07-01T23:59:59.000Z

340

Changing climate  

SciTech Connect

This article reviews a book written by a committee of the National Research Council. The book discussed the Greenhouse Effect which is a warming of the earth's atmosphere caused by the doubling of the atmospheric carbon dioxide concentration. The excess carbon dioxide is pollution derived from the burning of fossil fuels. The report suggested that the warming of the atmosphere would cause thawing of the polar regions which in turn would cause a rise in sea levels and flooding of the coastal lowlands. In addition to the flooding, the report predicted climate changes that would effect the productivity of croplands in the west. The authors of the report stressed that there was no way to avoid this warming of the earth. They suggested that people should start preparing for the inevitable.

1983-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "horsepower change front" 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

Technology evaluation of the Stirling engine for stationary power generation in the 500 to 2000 horsepower range  

SciTech Connect

Results are presented of a study undertaken to assess the potential and development status of the Stirling engine and recommendations are made for a possible program to develop 500 to 2000 hp stationary Stirling engines for commercial introduction by the late 1980's. Information is included on the operation, performance, historical development, and design of Stirling engines; requirements and characteristics of associated combustion systems; economics; technology advances needed; and the technological risks involved in developing Stirling engines for stationary power generation. (LCL)

Hogland, L.C.; Percival, W.H.

1978-09-01T23:59:59.000Z

342

Design and development of Stirling engines for stationary power generation applications in the 500 to 3000 horsepower range  

SciTech Connect

Initial work in a project on the design and development of Stirling engines for stationary integrated energy systems is reported. Information is included on a market assessment, design methodology, evaluation of engine thermodynamic performance, and preliminary system design. It is concluded that Stirling engines employing clean fossil fuels cannot compete with diesel engines. However, combustion technology exists for the successful burning of coal-derived fuels in a large stationary stirling engine. High thermal efficiency is predicted for such an engine and further development work is recommended. (LCL)

1980-02-01T23:59:59.000Z

343

Structure of the Cold Front Observed in SESAME-AVE III and its Comparison with the Hoskins-Bretherton Frontogenesis Model  

Science Conference Proceedings (OSTI)

A cold front which passed through the dense network of the SESAME-AVE (Severe Environmental Storms and Mesoscale Experiment–Atmospheric Variability Experiment) on 25–26 April 1979 was investigated. Rawinsonde data collected from 23 special ...

Yoshi Ogura; Diane Portis

1982-12-01T23:59:59.000Z

344

The 12/13 January 1988 Narrow Cold-Frontal Rainband Observed during MFDP/FRONTS 87. Part I: Kinematics and Thermodynamics  

Science Conference Proceedings (OSTI)

The kinematic and thermodynamic structure of a narrow cold-frontal rainband (NCFR) observed during the English–French–German MFDP/FRONTS 87 experiment is presented. Radiosonde data indicated a very weak convective instability below 1500-m ...

Frank Roux; Virginie Marécal; Danièle Hauser

1993-04-01T23:59:59.000Z

345

VHF-ST Radar Observations of an Upper-Level Front Using Vertical and Oblique-Beam C2N Measurements  

Science Conference Proceedings (OSTI)

Mesoscale aspects of an upper-level front that moved over Brittany (France) during the Mesoscale Frontal Dynamical Project 1987 experiment are investigated using very high frequency stratospheric–tropospheric (VHF-ST) radar data and European ...

J-L. Caccia; J-P. Cammas

1998-02-01T23:59:59.000Z

346

Control of the smoldering front temperature in a carbon- and carbonate-containing porous medium in order to limit CO2 emissions.  

E-Print Network (OSTI)

??La thèse s’intéresse au contrôle de la température d’un front de combustion propagé dans un milieu poreux contenant du carbone fixe et des carbonates (CaCO3).… (more)

Sennoune, Mohamed

2011-01-01T23:59:59.000Z

347

Nucleon electromagnetic form factors and electroexcitation of low lying nucleon resonances in a light-front relativistic quark model  

Science Conference Proceedings (OSTI)

We utilize a light-front relativistic quark model (LF RQM) to predict the 3q core contribution to the electroexcitation amplitudes for the {Delta}(1232)P{sub 33}, N(1440)P{sub 11}, N(1520)D{sub 13}, and N(1535)S{sub 11} up to Q{sup 2} = 12 GeV{sup 2}. The parameters of the model have been specified via description of the nucleon electromagnetic form factors in the approach that combines 3q and pion-cloud contributions in the LF dynamics.

Aznauryan Inna, Burkert Volker

2012-05-01T23:59:59.000Z

348

Lab announces security changes  

NLE Websites -- All DOE Office Websites (Extended Search)

Lab announces security changes Lab announces security changes The Laboratory is implementing several changes to its security procedures as the result of a recent security...

349

Effect of Front-Side Silver Metallization on Underlying n+-p Junction in Multicrystalline Silicon Solar Cells: Preprint  

Science Conference Proceedings (OSTI)

We report on the effect of front-side Ag metallization on the underlying n+-p junction of multicrystalline Si solar cells. The junction quality beneath the contacts was investigated by characterizing the uniformities of the electrostatic potential and doping concentration across the junction, using scanning Kelvin probe force microscopy and scanning capacitance microscopy. We investigated cells with a commercial Ag paste (DuPont PV159) and fired at furnace setting temperatures of 800 degrees, 840 degrees, and 930 degrees C, which results in actual cell temperatures ~100 degrees C lower than the setting temperature and the three cells being under-, optimal-, and over-fired. We found that the uniformity of the junction beneath the Ag contact was significantly degraded by the over-firing, whereas the junction retained good uniformity with the optimal- and under-fire temperatures. Further, Ag crystallites with widely distributed sizes from <100 nm to several ?m were found at the Ag/Si interface of the over-fired cell. Large crystallites were imaged as protrusions into Si deeper than the junction depth. However, the junction was not broken down; instead, it was reformed on the entire front of the crystallite/Si interface. We propose a mechanism of the junction-quality degradation, based on emitter Si melting at the temperature around the Ag-Si eutectic point during firing, and subsequent recrystallization with incorporation of impurities in the Ag paste and with formation of crystallographic defects during quenching.

Jiang, C. S.; Li, Z. G.; Moutinho, H. R.; Liang, L.; Ionkin, A.; Al-Jassim, M. M.

2012-06-01T23:59:59.000Z

350

An analysis of the kinetics of thermal damage and movement of damage front in laser irradiated egg white  

E-Print Network (OSTI)

Some of the major applications of laser surgery involve the photocoagulation of diseased tissue, with minimal or no damage to the surrounding healthy tissue. There is a growing need for a model for the quantification of thermal damage. The models presently available in the literature assume biological tissue to be composed of a single component having a single rate of damage. But recent studies have shown that a distribution of rate parameters rather than a single rate parameter, best describes the process of thermal coagulation. This study assumes tissue to be composed of two or more components, having different rates of damage. The results of this model are then used to find an effective rate of damage for a single rate model which would yield the same end concentrations as the multi rate model. Results indicate that the difference between the single rate and the multi rate predictions is highly predominant for relatively lower power settings, for the biokinetic coefficient values used in this research. As the power is increased, a single rate model effectively describes a multi rate model, in the prediction of damage and movement of damage front. The movement of damage front was also studied experimentally using Digital Image Processing techniques. The damage model predicted by this study qualitatively follows the theoretical models available in the literature.

Azeemi, Aamer Amjed

1993-01-01T23:59:59.000Z

351

Best Practices in Strategic Market Management: Cases from the Front Lines of Competition  

Science Conference Proceedings (OSTI)

With the specter of retail competition looming, utilities face a plethora of strategic challenges, ranging from choosing a market focus to acquiring core competencies to specifying portfolios of profitable products and services. This report examines the best practices of some of the most successful corporations that have undergone major transitions during the last 15 years. These practices include developing competitive marketing strategies as well as managing internal and external change.

1996-03-08T23:59:59.000Z

352

change_address_111609  

NLE Websites -- All DOE Office Websites (Extended Search)

CHANGE OF ADDRESS and EMERGENCY NOTIFICATION CHANGE OF ADDRESS and EMERGENCY NOTIFICATION TO: HUMAN RESOURCES DATE: Z# Social Security # Print First Name Print Middle Name or Initial Print Last Name (Currently in Payroll System) Complete appropriate changes: NAME CHANGE: Print Name Change to ADDRESS CHANGE: Mailing Address City State Zip

353

Changing Faces, Changing Government | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Changing Faces, Changing Government Changing Faces, Changing Government Changing Faces, Changing Government May 24, 2012 - 3:24pm Addthis Changing Faces, Changing Government What are the key facts? The Energy Department incorporated metrics into funding programs to track minority participation; conducted robust outreach to business associations, utilizing a corporate enterprise system to capture and track small business awards to AAPI-owned businesses; incorporated AAPI businesses into its Small Business Advisory Group; and leveraged its Office of Small and Disadvantaged Business Utilization to target areas of high Asian American populations where there are DOE offices and facilities. Editor's Note: This blog was originally posted by the White House Initiative on Asian Americans and Pacific Islanders, by their Deputy

354

Connecting Changing Ocean Circulation with Changing Climate  

Science Conference Proceedings (OSTI)

The influence of changing ocean currents on climate change is evaluated by comparing an earth system model’s response to increased CO2 with and without an ocean circulation response. Inhibiting the ocean circulation response, by specifying a ...

Michael Winton; Stephen M. Griffies; Bonita L. Samuels; Jorge L. Sarmiento; Thomas L. Frölicher

2013-04-01T23:59:59.000Z

355

Geothermal investigations at selected thermal systems of the northern Wasatch Front Weber and Box Elder Counties, Utah. Report of investigation No. 141  

DOE Green Energy (OSTI)

Numerous thermal springs are present along the Wasatch Front from Utah valley on the south to the state line on the north. These systems are just west of the Wasatch Mountains at the eastern edge of the Basin and Range physiographic province and within the active seismic zone referred to as the Intermountain Seismic Belt. This Report of Investigation is a summary of UGMS investigations at four northern Wasatch Front geothermal systems: Utah, Crystal (Madsen), and Udy hot springs; and the Little Mountain - south system. All of these resources are deep circulation systems and the water is heated by the normal heat flow of the Basin and Range Province. Heat from volcanic sources is not believed to contribute to the warming of any northern Wasatch Front springs. Data collected under the DOE/DGE state coupled program are presented for use by individuals interested in these systems.

Murphy, P.; Gwynn, J.W.

1979-11-01T23:59:59.000Z

356

Local attitudes, knowledge and values regarding natural resource use in the range of the Maroon-fronted Parrot in northeastern Mexico  

E-Print Network (OSTI)

New ecosystem management policies for a national park in northeastern Mexico emphasize the need for stakeholder participation. To facilitate public participation, an environmental education program should be designed for both local and regional audiences. The "Cumbres de Monterrey" National Park is located in a forested area that serves as a mountainous watershed supplying over 4 million people. Urban development occurred within the park due to lack of a management plan. A grassroots effort pressured authorities to study land-use suitability to better preserve the park. The purpose of the present study was to understand the perspectives of local rural residents, regarding (a) the value of local natural resources, (b) their knowledge about protected areas and species, (c) their attitudes towards changing land-use trends, and (d) demographic characteristics salient to the design of an environmental education program for subgroups within the population. The research method integrated qualitative and quantitative techniques. Contextual information was collected during participant observation in 2 concurrent studies: (a) land-use suitability for the northern Sierra Madre Oriental and (b) natural history of a potential flagship species, the endemic and endangered Maroon-fronted Parrot (Rhynchopsitta terrisi). Systematic data were collected during semi-structured interviews (n = 219), guided by a list of closed questions (predetermined categorical responses) and open questions that permitted interviewees to express ideas in their own words. In general, local residents valued non-timber forest products harvested for personal use. Local residents were familiar with the flagship species but lacked ecological knowledge about the purpose and location of protected areas. Attitudes about parrots, forests, and alternative sources of income were generally positive. Attitudes varied about tourism and land sales to urbanites according to location, possibly due to differences in experiential knowledge. I recommend integrating regional and local perspectives in the design of educational programs including: (a) identification of distinct audiences within the general population, (b) use of appropriate qualitative techniques for audiences that vary in demographic characteristics, and (c) creation of educational motifs, based on charismatic species, to deliver messages to distinct audiences. This study provides guidelines for involving stakeholders in positive responses to change in ecosystem management policies.

Madero-Farias, Alma Alida

2000-01-01T23:59:59.000Z

357

ANL/APS/TB-44, Guidelines for Beamline and Front-End Radiation Shielding Design at the Advanced Photon Source  

NLE Websites -- All DOE Office Websites (Extended Search)

APS/TB-44 Rev. 4 APS/TB-44 Rev. 4 Guidelines for Beamline and Front-End Radiation Shielding Design at the Advanced Photon Source Revision 4 Advanced Photon Source About Argonne National Laboratory Argonne is a U.S. Department of Energy laboratory managed by UChicago Argonne, LLC under contract DE-AC02-06CH11357. The Laboratory's main facility is outside Chicago, at 9700 South Cass Avenue, Argonne, Illinois 60439. For information about Argonne and its pioneering science and technology programs, see www.anl.gov. Availability of This Report This report is available, at no cost, at http://www.osti.gov/bridge. It is also available on paper to the U.S. Department of Energy and its contractors, for a processing fee, from: U.S. Department of Energy Office of Scientific and Technical Information

358

Optimization of DC-DC Converters for Improved Electromagnetic Compatibility With High Energy Physics Front-End Electronics  

E-Print Network (OSTI)

The upgrade of the Large Hadron Collider (LHC) experiments at CERN sets new challenges for the powering of the detectors. One of the powering schemes under study is based on DC-DC buck converters mounted on the front-end modules. The hard environmental conditions impose strict restrictions to the converters in terms of low volume, radiation and magnetic field tolerance. Furthermore, the noise emission of the switching converters must not affect the performance of the powered systems. A study of the sources and paths of noise of a synchronous buck converter has been made for identifying the critical parameters to reduce their emissions. As proof of principle, a converter was designed following the PCB layout considerations proposed and then used for powering a silicon strip module prototype for the ATLAS upgrade, in order to evaluate their compatibility.

Fuentes, C; Michelis, S; Blanchot, G; Allongue, B; Faccio, F; Orlandi, S; Kayal, M; Pontt, J

2011-01-01T23:59:59.000Z

359

The Back End of the Fuel Cycle Moves Front and Center  

SciTech Connect

For many years, the commercial nuclear business has remained relatively stable in many ways. That is unlikely to be the case in the coming years. While some countries have called for the phase out of nuclear power and others have ordered a small number of new plants, the overall profile of the nuclear power business has changed little. The number of countries with nuclear power plants is not much different than 10 years ago and the total number of operating plants has increased only slightly. Commercial enrichment and reprocessing services have remained the province of a few countries and consortia. Repository programs have moved forward slowly in some cases, backward in others, with a very small number making substantial progress. We are now witnessing the beginnings of serious change, with significant consequences for the future nuclear regime. Business as usual will not be the business of the future. The way the nuclear and policy community respond will have much to do with energy adequacy, national security, international stability, and environmental consequences including waste management and disposal. A number of events and trends are becoming increasingly apparent and are cause for both opportunity and caution: (1) New nuclear power plant orders are likely to grow and spread, particularly in the developing world, e.g. China and India. (2) The growing recognition that the developing world will be a major competitor for limited energy resources is raising awareness in the developed world regarding concerns for future energy security. (3) Clearer evidence of the effects of greenhouse gas emissions on global warming, largely from the burning of fossil fuels, is creating more attention on the environmental benefits of nuclear power. (4) The last decade has shown unequivocal evidence of countries lying, cheating on their NPT obligation, and covertly carrying out nuclear weapons-related activities. Some countries have suggested their presumed need for a domestic nuclear fuel cycle as a rationale to pursue enrichment and/or reprocessing capabilities, which would move them to the doorstep of being nuclear weapons capable. The DPRK even took the action to abrogate the NPT to hold on to its nuclear weapons program. (5) 9/11 and other evidence have made it undeniable that terrorist groups would like to obtain weapons of mass destruction, particularly nuclear weapons, and would use them if they could. A number of initiatives have been proposed recently to allow for the growth and spread of nuclear power while limiting the justifications for additional countries to pursue the acquisition of enrichment or reprocessing capabilities. Enrichment or reprocessing are the only ways for countries to gain the indigenous capability to transform natural materials and fuel for and from nuclear power plants to directly weapons-usable materials.

Isaacs, T; Choi, J

2005-11-02T23:59:59.000Z

360

Detecting Climate Change  

Science Conference Proceedings (OSTI)

The likelihood ratio of the data for a hypothesis of some change, relative to the hypothesis of no change, is a suitable statistical measure for the detection of climate change. Likelihood ratios calculated on the basis of Angell and Korshover's (...

Edward S. Epstein

1982-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "horsepower change front" 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

The Residential Sector: Changing Markets, Changing Technologies  

Science Conference Proceedings (OSTI)

Residential customers in the U.S. are confronted with markets for home services that continue to change rapidly. Not only are markets for traditional "utilities" such as telecommunications services, energy services, and entertainment services transitioning to competitive choice scenarios, but the technology which customers use in each of these arenas is changing rapidly as well. This report outlines the way that customers are responding to these changing market dynamics, in terms of the way they think ab...

1999-12-02T23:59:59.000Z

362

Idealized Two-Dimensional Modeling of a Coastal Buoyancy Front, or River Plume, under Downwelling-Favorable Wind Forcing with Application to the Alaska Coastal Current  

Science Conference Proceedings (OSTI)

The cross-shelf structure of a buoyancy-driven coastal current, such as produced by a river plume, is modeled in a two-dimensional cross-shelf slice as a “wide” geostrophically balanced buoyancy front. Downwelling-favorable wind stress applied to ...

William J. Williams; Thomas J. Weingartner; Albert J. Hermann

2010-02-01T23:59:59.000Z

363

An Observational and Numerical Study of an Intense Landfalling Cold Front along the Northwest Coast of the United States during COAST IOP 2  

Science Conference Proceedings (OSTI)

This paper presents an observational and numerical study of an intense wintertime cold front that made landfall along the northwest coast of the United States during IOP 2 (3–4 Dec 1993) of the Coastal Observation and Simulation with Topography ...

Fang-Ching Chien; Clifford F. Mass; Paul J. Neiman

2001-05-01T23:59:59.000Z

364

Initiation and Organizational Modes of an Extreme-Rain-Producing Mesoscale Convective System along a Mei-Yu Front in East China  

Science Conference Proceedings (OSTI)

The initiation and organization of a quasi-linear extreme-rain-producing mesoscale convective system (MCS) along a Meiyu front in East China during the midnight-to-morning hours of 8 July 2007 are studied using high-resolution surface observations ...

Yali Luo; Yu Gong; Da-Lin Zhang

365

Lagrangian H/U3 Values Computed around Fronts Using a Fine-Resolution Numerical Model and Ferryboat-Monitored SST Dataset  

Science Conference Proceedings (OSTI)

Front locations are identified as the local maximum of the sea surface temperature gradient revealed in the continuously ferryboat-monitored data in the Seto Inland Sea, Japan. In addition, Simpson and Hunter’s H/U3 values, where H is the water ...

Youn-Jong Sun; Atsuhiko Isobe

2008-11-01T23:59:59.000Z

366

Advanced time-stamped total data acquisition control front-end for MeV ion beam microscopy and proton beam writing  

Science Conference Proceedings (OSTI)

Many ion-matter interactions exhibit sub-@ms time dependences such as, fluorophore emission quenching and ion beam induced charge (IBIC). Conventional event-mode MeV ion microbeam data acquisition systems discard the time information. Here we describe ... Keywords: Data acquisition, FPGA, Front-end, Microbeam, Time-stamping

Henri Kivistö; Mikko Rossi; Pete Jones; Rattanaporn Norarat; Nitipon Puttaraksa; Timo Sajavaara; Mikko Laitinen; VäInö HäNninen; Kimmo Ranttila; Pauli Heikkinen; Leona Gilbert; Varpu MarjomäKi; Harry J. Whitlow

2013-02-01T23:59:59.000Z

367

The Low-Level Structure and Evolution of a Dry Arctic Front over the Central United States. Part I: Mesoscale Observations  

Science Conference Proceedings (OSTI)

Observations taken over the period 8–10 March 1992 during the Storm-scale Operational and Research Meteorology Fronts Experiment Systems Test in the central United States are used to document the detailed low-level structure and evolution of a ...

L. Jay Miller; Margaret A. LeMone; William Blumen; Robert L. Grossman; Nimal Gamage; Robert J. Zamora

1996-08-01T23:59:59.000Z

368

The Intensification of the Low-Level Jet during the Development of Mesoscale Convective Systems on a Mei-Yu Front  

Science Conference Proceedings (OSTI)

During the period of 21–25 June 1991, a mei-yu front, observed by the post–Taiwan Area Mesoscale Experiment, produced heavy precipitation along the western side of the Central Mountain Range of Taiwan. Several oceanic mesoscale convective systems ...

Chaing Chen; Wei-Kuo Tao; Pay-Liam Lin; George S. Lai; S-F. Tseng; Tai-Chi Chen Wang

1998-02-01T23:59:59.000Z

369

The IMPROVE-1 Storm of 1–2 February 2001. Part I: Development of a Forward-Tilted Cold Front and a Warm Occlusion  

Science Conference Proceedings (OSTI)

Analysis of observations and the fifth-generation Pennsylvania State University–National Center for Atmospheric Research (PSU–NCAR) Mesoscale Model (MM5) are used to study the development of a forward-tilted cold front off the coast of Washington ...

John D. Locatelli; Mark T. Stoelinga; Matthew F. Garvert; Peter V. Hobbs

2005-10-01T23:59:59.000Z

370

Orographic Effects and Evaporative Cooling along a Subtropical Cold Front: The Case of the Spectacular Saharan Dust Outbreak of March 2004  

Science Conference Proceedings (OSTI)

On 2 March 2004 a marked upper-level trough and an associated surface cold front penetrated into the Sahara. High winds along and behind this frontal system led to an extraordinary, large-scale, and long-lived dust outbreak, accompanied by ...

Gregor Gläser; Peter Knippertz; Bernd Heinold

2012-08-01T23:59:59.000Z

371

FPI (Islamic Defenders' Front): the Making of a Violent Islamist Movement in the New Democracy of Indonesia  

E-Print Network (OSTI)

The current study is aimed at investigating the puzzle of why FPI (Islamic Defenders' Front) has chosen to adopt violent strategies within the democratic context of Indonesia. Much of literature on social movements suggests that democracy is inherently nonviolent because it allows social movements to use a number of reasonable tactics to pursue their goals. On the contrary, authoritarianism is considered to be the cause of the emergence of violent movements. However, a violent movement is not necessarily absent in the context of democracy. Using the language of Islam, justice and democracy, FPI (Islamic Defender's Front) conspicuously committed at least 64 cases of violent collective actions from 1998 to 2010. Three levels of analysis are used in order to investigate this social puzzle, namely the level of organization, individual characters and FPI's violent actions. Combining these three levels of analysis, this study found that the making of the violent Islamist movement (FPI) is complex and interconnected. First, there are at least four social environments that have led FPI to the adoption of violent means. They are the historical context of Islamist movements in Indonesia (1945-1998), the timing of violence by FPI, social support for FPI's violent actions and low state capacity. Second, there are at least four factors that relate to individuals and organization of FPI. They are FPI's encounter with so-called justified violence, FPI's engagement in violence-prone activities, fundamentalism and FPI's framing of its violent actions. Combining these factors has made FPI's violence become more persistent in the new democratic context of Indonesia. Consequently, despite the fact that democracy inhibits political violence, democracy may also allow the use of violent means by social movements. In doing so, democracy opens an opportunity for people, especially elites, to support the cause of violence. Therefore, this can undermine the government's will to fully suppress the violent movement. In addition, there are other significant factors, other than state repression, that also facilitate violence, such as a movement's choice to engage in violence-prone activities, low state capacity, a good timing of violence (cultural resources) and a good framing of violence.

Munajat

2012-05-01T23:59:59.000Z

372

Change in historic buildings  

E-Print Network (OSTI)

Change in historic buildings is inevitable. If these changes are not well-managed, the cityscape will be threatened because a city is composed of buildings. A good city should combine both growth and preservation. Controlling ...

Yin, Chien-Ni

1992-01-01T23:59:59.000Z

373

Federal Energy Management Program: Continuous Change Institutional Change  

NLE Websites -- All DOE Office Websites (Extended Search)

Continuous Change Continuous Change Institutional Change Principle to someone by E-mail Share Federal Energy Management Program: Continuous Change Institutional Change Principle on Facebook Tweet about Federal Energy Management Program: Continuous Change Institutional Change Principle on Twitter Bookmark Federal Energy Management Program: Continuous Change Institutional Change Principle on Google Bookmark Federal Energy Management Program: Continuous Change Institutional Change Principle on Delicious Rank Federal Energy Management Program: Continuous Change Institutional Change Principle on Digg Find More places to share Federal Energy Management Program: Continuous Change Institutional Change Principle on AddThis.com... Sustainable Buildings & Campuses Operations & Maintenance

374

Software change contracts  

Science Conference Proceedings (OSTI)

Incorrect program changes including regression bugs, incorrect bug-fixes, incorrect feature updates are pervasive in software. These incorrect program changes affect software quality and are difficult to detect/correct. In this paper, we propose the ... Keywords: JML, change contract, regression testing, software evolution

Dawei Qi; Jooyong Yi; Abhik Roychoudhury

2012-11-01T23:59:59.000Z

375

Front Matter Template  

NLE Websites -- All DOE Office Websites (Extended Search)

RPSEA RPSEA Final Report 08123.02.Final Field Demonstration of Alkaline Surfactant Polymer Floods in Mature Oil Reservoirs, Brookshire Dome, Texas October 21, 2012 Chris Lewis Layline Petroleum LLC PI-Mukul M. Sharma Bo Gao The University of Texas at Austin 200 E. Dean Keeton St. Stop C0300 Austin, Texas 78712 (512) 471-3257 msharma@mail.utexas.edu 2 LEGAL NOTICE This report was prepared by Layline Petroleum LLC as an account of work sponsored by the Research Partnership to Secure Energy for America, RPSEA. Neither RPSEA, members of RPSEA, the National Energy Technology Laboratory, the U.S. Department of Energy, nor any person acting on behalf of any of the entities: a. MAKES ANY WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED WITH RESPECT TO ACCURACY, COMPLETENESS, OR USEFULNESS

376

New Vision front  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

3 3 United States Department of Energy Office of Electric Transmission and Distribution . . A National Vision for Electricity's Second 100 Years A National Vision for Electricity's Second 100 Years A National Vision for Electricity's Second 100 Years A National Vision for Electricity's Second 100 Years "GRID 2030" United States Department of Energy Office of Electric Transmission and Distribution . . Based on the Results of the National Electric System Vision Meeting Washington, DC April 2-3, 2003 July 2003 "GRID 2030" A NATIONAL VISION FOR ELECTRICITY'S SECOND 100 YEARS Transforming the Grid to Revolutionize Electric Power in North America i "Grid 2030" - A National Vision for Electricity's Second 100 Years A CALL FOR LEADERSHIP Accessible, abundant, and affordable electric power is one of the

377

New Vision front  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

4 4 United States Department of Energy Office of Electric Transmission and Distribution . . NATIONAL ELECTRIC DELIVERY TECHNOLOGIES ROADMAP Transforming the Grid to Revolutionize Electric Power in North America Transforming the Grid to Revolutionize Electric Power in North America Transforming the Grid to Revolutionize Electric Power in North America Transforming the Grid to Revolutionize Electric Power in North America United States Department of Energy Office of Electric Transmission and Distribution . . Based on the Results of the National Electric Delivery Technologies Roadmap Workshop Washington, DC July 8-9, 2003 January 2004 NATIONAL ELECTRIC DELIVERY TECHNOLOGIES ROADMAP - DESIGNING "GRID 2030" ARCHITECTURE - - DEVELOPING CRITICAL TECHNOLOGIES -

378

New Vision front  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

GRID 2030" GRID 2030" A NATIONAL VISION FOR ELECTRICITY'S SECOND 100 YEARS July 2003 United States Department of Energy Office of Electric Transmission and Distribution Transforming the Grid to Revolutionize Electric Power in North America Transforming the Grid to Revolutionize Electric Power in North America Transforming the Grid to Revolutionize Electric Power in North America Transforming the Grid to Revolutionize Electric Power in North America . . i "Grid 2030" - A National Vision for Electricity's Second 100 Years A CALL FOR LEADERSHIP Accessible, abundant, and affordable electric power is one of the cornerstones of the U.S. economy. On February 6, 2003 President Bush highlighted the need to "...modernize our electric delivery system...for economic security...and for national security." The U.S. Department of

379

FrontMatter.qxd  

NLE Websites -- All DOE Office Websites (Extended Search)

promotes the use of energy-efficient practices (such as efficient lighting) and renewable energy technologies (such as solar electric systems) in the parks. Given the high number...

380

Front Inside Cover [blank  

Science Conference Proceedings (OSTI)

The Large Hadron Collider (LHC) at CERN, the European Organization for Nuclear Research, needs to produce unprecedented volumes of data when it starts operation in 2007. To provide for its computational needs, the LHC computing grid (LCG) should be deployed ...

2005-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "horsepower change front" 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

Front Matter Template  

NLE Websites -- All DOE Office Websites (Extended Search)

the SPE Latin America and Caribbean Petroleum Engineering Conference, Buenos Aires, Argentina, 25-28 March. 10. Gupta, D.V.S. 2003. Field Application of Unconventional Foam...

382

front matter July12  

U.S. Energy Information Administration (EIA)

September 2013 U.S. Energy Information Administration | Natural Gas Monthly 1 Highlights This issue of the Natural Gas Monthly ...

383

Front Matter Template  

NLE Websites -- All DOE Office Websites (Extended Search)

CONTROL IN CHEMICAL FLOODING Submitted by: University of Texas, Austin P.O. Box 7726 Austin, TX 78713 Prepared for: United States Department of Energy National Energy...

384

NETL Report Cover (Front)  

NLE Websites -- All DOE Office Websites (Extended Search)

DOE Award No.: DE-FE0001243 Topical Report LAND AND RESOURCE MANAGEMENT ISSUES RELEVANT TO DEPLOYING IN-SITU THERMAL TECHNOLOGIES Submitted by: University of Utah Institute for Clean and Secure Energy 155 South 1452 East, Room 380 Salt Lake City, Utah 84112 Prepared for: United States Department of Energy National Energy Technology Laboratory January, 2011 Office of Fossil Energy LAND A ND R ESOURCE M ANAGEMENT I SSUES R ELEVANT T O D EPLOYING IN---SITU T HERMAL T ECHNOLOGIES Topical Report Reporting P eriod: O ctober 3 1, 2 009 t hrough D ecember 3 1, 2 010 Principal A uthors: R obert K eiter, J ohn R uple, H eather T anana, a nd M ichelle K line Report I ssued: J anuary 2 011 DOE A ward N o.: D E---FE0001243 University o f U tah Institute f or C lean a nd S ecure E nergy

385

FrontMatter.qxd  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Retrofit Workbook Retrofit Workbook A PRACTICAL "HOW TO" GUIDE FOR THE NATIONAL PARK SERVICE VISITOR CENTERS A PRODUCT OF THE GREEN ENERGY PARKS PARTNERSHIP NATIONAL PARK SERVICE * DEPARTMENT OF ENERGY Prepared by Lawrence Berkeley National Laboratory for The U.S. Department of Energy Federal Energy Management Program This work was supported by the Assistant Secretary for Energy Efficiency and Renewable Energy's Federal Energy Management Program, and the Office of Building Technology, State and Community Programs of the U.S. Department of Energy under Contract No. DE-AC03-76SF00098. Green Energy Parks is a joint program of the U.S. Department of the Interior's (DOI) National Park Service (NPS) and the U.S. Department of Energy (DOE). The program promotes the use of energy-efficient practices (such as efficient lighting) and renewable energy technologies

386

01 Front Matter  

Science Conference Proceedings (OSTI)

... The TechLink region includes Montana, Oregon, Washington, Idaho, Utah, Wyoming, North Dakota, and South Dakota. ...

2010-07-27T23:59:59.000Z

387

Climate change 2007 - mitigation of climate change  

SciTech Connect

This volume of the Fourth Assessment Report (AR4) of the Intergovernmental Panel on Climate Change (IPCC) provides a comprehensive, state-of-the-art and worldwide overview of scientific knowledge related to the mitigation of climate change. It includes a detailed assessment of costs and potentials of mitigation technologies and practices, implementation barriers, and policy options for the sectors: energy supply, transport, buildings, industry, agriculture, forestry and waste management. It links sustainable development policies with climate change practices. This volume will again be the standard reference for all those concerned with climate change. Contents: Foreword; Preface; Summary for policymakers; Technical Summary; 1. Introduction; 2. Framing issues; 3. Issues related to mitigation in the long term context; 4. Energy supply; 5. Transport and its infrastructure; 6. Residential and commercial buildings; 7. Industry; 8. Agriculture; 9. Forestry; 10. Waste management; 11. Mitigation from a cross sectoral perspective; 12. Sustainable development and mitigation; 13. Policies, instruments and co-operative agreements. 300 figs., 50 tabs., 3 annexes.

Metz, B.; Davidson, O.; Bosch, P.; Dave, R.; Meyer, L. (eds.)

2007-07-01T23:59:59.000Z

388

Stephen S. Chang Award  

Science Conference Proceedings (OSTI)

Recognizing scientists or technologists who have made decisive accomplishments in research for the improvement or development of products related to lipids. Stephen S. Chang Award ...

389

Recent Changes to OOF  

Science Conference Proceedings (OSTI)

... direction of the principal stress, ie, the amount of energy that would ... Changed output/stress/statistics/type=invariant to eigenvalues and added a new ...

2013-08-23T23:59:59.000Z

390

Buildings Energy Data Book: 5.5 Thermal Distribution Systems  

Buildings Energy Data Book (EERE)

6 1999 Energy Efficient Motors, Replacements and Sales, by Horsepower Class | Units in Use Horsepower | Energy Efficient Horsepower Range (106) | % Retired 1 - 5 | 17% 5.1 - 20 |...

391

PETSc: Documentation: Changes  

NLE Websites -- All DOE Office Websites (Extended Search)

Changes Home Download Features Documentation Manual pages and Users Manual Referencing PETSc Tutorials Installation AMS Changes dev 3.4 3.3 3.2 3.1 3.0.0 2.3.3 2.3.2 2.3.1 2.3.0...

392

Estimating frequency of change  

Science Conference Proceedings (OSTI)

Many online data sources are updated autonomously and independently. In this article, we make the case for estimating the change frequency of data to improve Web crawlers, Web caches and to help data mining. We first identify various scenarios, where ... Keywords: Change frequency estimation, Poisson process

Junghoo Cho; Hector Garcia-Molina

2003-08-01T23:59:59.000Z

393

Characterizing Web Document Change  

Science Conference Proceedings (OSTI)

The World Wide Web is growing and changing at an astonishing rate. For the information in the web to be useful, web information systems such as search engines have to keep up with the growth and change of the web. In this paper we study how web documents ...

Lipyeow Lim; Min Wang; Sriram Padmanabhan; Jeffrey Scott Vitter; Ramesh C. Agarwal

2001-07-01T23:59:59.000Z

394

Climate Change | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Science & Innovation Climate Change Climate Change Learn about the effects climate change can have on our energy supplies and infrastructure and explore a...

395

The following figure shows the restratification process for a weak front (0.1K/10km) and a strong front (0.5K/10km). Note the initial inertial oscillations and the significantly stronger restratification that  

E-Print Network (OSTI)

These unbalanced instabilities are small and marginally resolved at best in many simulations. Furthermore, Tandon of Physical Oceanography, 28, 634­658. Mahadevan, A., A. Tandon, and R. Ferrari: 2008, Rapid changes in mixed for the static stability of rotating atmo- spheres. Journal of the Atmospheric Sciences, 29. Tandon, A. and C

Colorado at Boulder, University of

396

Climate change cripples forests  

NLE Websites -- All DOE Office Websites (Extended Search)

Climate change cripples forests Climate change cripples forests Climate change cripples forests A team of scientists concluded that in the warmer and drier Southwest of the near future, widespread tree mortality will cause forest and species distributions to change substantially. October 1, 2012 A dead pinon at the edge of the Grand Canyon, harbinger of the future for trees in the Southwest United States. Photo courtesy A. Park Williams. A dead pinon at the edge of the Grand Canyon, harbinger of the future for trees in the Southwest United States. Photo courtesy A. Park Williams. Contact Nancy Ambrosiano Communications Office (505) 667-0471 Email "There will still be wet winters, but they will more often be followed by warm summers, putting stress on trees and limiting their ability to respond

397

Climate change cripples forests  

NLE Websites -- All DOE Office Websites (Extended Search)

Climate Change Cripples Forests Climate Change Cripples Forests Climate change cripples forests A team of scientists concluded that in the warmer and drier Southwest of the near future, widespread tree mortality will cause forest and species distributions to change substantially. October 1, 2012 A dead pinon at the edge of the Grand Canyon, harbinger of the future for trees in the Southwest United States. Photo courtesy A. Park Williams. A dead pinon at the edge of the Grand Canyon, harbinger of the future for trees in the Southwest United States. Photo courtesy A. Park Williams. Contact Nancy Ambrosiano Communications Office (505) 667-0471 Email "There will still be wet winters, but they will more often be followed by warm summers, putting stress on trees and limiting their ability to respond

398

Climate change cripples forests  

NLE Websites -- All DOE Office Websites (Extended Search)

Climate Change Cripples Forests Climate Change Cripples Forests Climate change cripples forests A team of scientists concluded that in the warmer and drier Southwest of the near future, widespread tree mortality will cause forest and species distributions to change substantially. October 1, 2012 A dead pinon at the edge of the Grand Canyon, harbinger of the future for trees in the Southwest United States. Photo courtesy A. Park Williams. A dead pinon at the edge of the Grand Canyon, harbinger of the future for trees in the Southwest United States. Photo courtesy A. Park Williams. Contact Nancy Ambrosiano Communications Office (505) 667-0471 Email "There will still be wet winters, but they will more often be followed by warm summers, putting stress on trees and limiting their ability to respond

399

Global Climate Change  

NLE Websites -- All DOE Office Websites (Extended Search)

When President Bush announced his Global Climate Change Initiative in February 2002, he committed the United States to a new strategy to cut greenhouse gas emissions over the next...

400

chang-98.pdf  

NLE Websites -- All DOE Office Websites (Extended Search)

from Models and Collocated AVHRR and ERBE Satellite Observations F.-L. Chang and Z. Li Canada Centre for Remote Sensing Ottawa, Ontario, Canada S. A. Ackerman Department of...

Note: This page contains sample records for the topic "horsepower change front" 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

The changing climate  

SciTech Connect

The earth owes its hospitable climate to the greenhouse effect, but now the effect threatens to intensify, rapidly warming the planet. Rising concentrations of carbon dioxide and other gases are the cause. The danger of warming is serious enough to warrant prompt action. The paper examines data on atmospheric warming and attempts to project effects into the future using atmospheric models. Three kinds of response to the threat are described: technical measures to counteract climatic change; adaptation to the changing climate; and prevention.

Schneider, S.H.

1989-09-01T23:59:59.000Z

402

Design and development of Stirling engines for stationary-power-generation applications in the 500- to 3000-horsepower range. Phase I final report  

SciTech Connect

A program plan and schedule for the implementation of the proposed conceptual designs through the remaining four phases of the overall large Stirling engine development program was prepared. The objective of Phase II is to prepare more detailed designs of the conceptual designs prepared in Phase I. At the conclusion of Phase II, a state-of-the-art design will be selected from the candidate designs developed in Phase I for development. The objective of Phase III is to prepare manufacturing drawings of the candidate engine design. Also, detailed manufacturing drawings of both 373 kW (500 hp) and 746 kW (1000 hp) power pack skid systems will be completed. The power pack skid systems will include the generator, supporting skid, controls, and other supporting auxiliary subsystems. The Stirling cycle engine system (combustion system, Stirling engine, and heat transport system) will be mounted in the power pack skid system. The objective of Phase IV is to procure parts for prototype engines and two power pack skid systems and to assemble Engines No. 1 and 2. The objective of Phase V is to perform extensive laboratory and demonstration testing of the Stirling engines and power pack skid systems, to determine the system performance and cost and commercialization strategy. Scheduled over a 6 yr period the cost of phases II through V is estimated at $22,063,000. (LCL)

1980-10-01T23:59:59.000Z

403

Design and development of Stirling engines for stationary power generation applications in the 500 to 3000 horsepower range. Volume 2. Program plan  

SciTech Connect

A plan for implementing the proposed state-of-the-art design described in Volume I has been developed. The main objective of the project is to demonstrate a large coal-fired Stirling engine and thus shorten the lead time to commercialization. The demonstration engine will be based on the concepts developed in the first phase of this program, as detailed in Volume I of this report. Thus the proposed program plan is based on the U-4 engine concept fired by a fluidized bed combustor with a two-stage gravity-assisted heat pipe. The plan is divided into five phases and an ongoing supporting technology program. Phase I, Conceptual Design, has been completed. The remaining phases are: Preliminary Design; Final Design; Fabrication; and Testing and Demonstration. The primary target is to begin testing the large coal-fired engine by the fifth year (1985) after the start of Preliminary Design.

Not Available,

1980-09-15T23:59:59.000Z

404

Real-Space Microscopic Electrical Imaging of n+-p Junction Beneath Front-Side Ag Contact of Multicrystalline Si Solar Cells  

SciTech Connect

We investigated the quality of the n+-p diffused junction beneath the front-side Ag contact of multicrystalline Si solar cells by characterizing the uniformities of electrostatic potential and doping concentration across the junction using the atomic force microscopy-based electrical imaging techniques of scanning Kelvin probe force microscopy and scanning capacitance microscopy. We found that Ag screen-printing metallization fired at the over-fire temperature significantly degrades the junction uniformity beneath the Ag contact grid, whereas metallization at the optimal- and under-fire temperatures does not cause degradation. Ag crystallites with widely distributed sizes were found at the Ag-grid/emitter-Si interface of the over-fired cell, which is associated with the junction damage beneath the Ag grid. Large crystallites protrude into Si deeper than the junction depth. However, the junction was not broken down; instead, it was reformed on the entire front of the crystallite/Si interface. We propose a mechanism of junction-quality degradation, based on emitter Si melting at the temperature around the Ag-Si eutectic point during firing, and subsequent re-crystallization with incorporation of Ag and other impurities and with formation of crystallographic defects during quenching. The effect of this junction damage on solar cell performance is discussed.

Jiang, C. S.; Li, Z. G.; Moutinho, H. R.; Liang, L.; Ionkin, A.; Al-Jassim, M. M.

2012-04-15T23:59:59.000Z

405

Reduce Climate Change  

NLE Websites -- All DOE Office Websites (Extended Search)

Reduce Climate Change Reduce Climate Change Highway vehicles release about 1.5 billion metric tons of greenhouse gases (GHGs) into the atmosphere each year-mostly in the form of carbon dioxide (CO2)-contributing to global climate change. Each gallon of gasoline you burn creates 20 pounds of CO2. That's roughly 5 to 9 tons of CO2 each year for a typical vehicle. more... How can a gallon of gasoline create 20 pounds of carbon dioxide? It seems impossible that a gallon of gasoline, which weighs about 6.3 pounds, could produce 20 pounds of carbon dioxide (CO2) when burned. However, most of the weight of the CO2 doesn't come from the gasoline itself, but the oxygen in the air. When gasoline burns, the carbon and hydrogen separate. The hydrogen combines with oxygen to form water (H2O), and carbon combines with oxygen

406

Global Climate Change Links  

NLE Websites -- All DOE Office Websites (Extended Search)

Global Climate Change Links Global Climate Change Links This page provides links to web pages that we at CDIAC feel do a responsible job of presenting information and discussion pertinent to the science behind the global climate change ("global warming") debate. These sites include those on both sides of the debate; some asserting that global warming is a clear and present danger, and others that might be labeled global warming "skeptics." Some of these sites don't take a position per se; they exist to offer the public objective scientific information and results on our present understanding of the climate system. The list is not intended to be comprehensive, by any means. We hope it will be especially helpful for those who may be just beginning their research into global

407

Vermont Climate Change Indicators  

Science Conference Proceedings (OSTI)

Climate change indicators are developed for Vermont in recent decades based on the trends in freeze dates, the length of the growing season, the frozen period of small lakes, and the onset of spring. These trends, which show a consistent pattern ...

Alan K. Betts

2011-04-01T23:59:59.000Z

408

Organisational change through influence  

Science Conference Proceedings (OSTI)

Influence is a phenomenon underpinning many types of interactions in both human and artificial organisations, and has a significant impact on the operation of the organisation. If influence can be examined at the ... Keywords: Formal specification and analysis/verification, Organisational changes, Organisations, Software agents

Mairi Mccallum; Wamberto W. Vasconcelos; Timothy J. Norman

2008-10-01T23:59:59.000Z

409

Single-photon single-ion interaction in free space configuration in front of a parabolic mirror  

E-Print Network (OSTI)

The efficient interaction between single photons and single matter objects in free space is of key importance for quantum technologies. An experimental setup for testing this possibility involves single two-level ion trapped at the focus of a parabolic metallic mirror. We study the conditions for the setup, under which the assumption about the free-space mode structure of the radiation field in the vicinity of the atom is justified. In our analysis we apply vectorial properties of light by including polarization degree of freedom. We look for possible changes in the spontaneous emission rate of the atom resulting from the presence of the parabolic boundary conditions.

Magdalena Stobi?ska; Robert Alicki

2009-05-25T23:59:59.000Z

410

Climate change risk and response  

E-Print Network (OSTI)

Climate Change Center White Paper. Cayan, Dan, PeterClimate Change Center White Paper. Cayan, Daniel R. , EdwinClimate Change Center White Paper. duVair, Pierre, Douglas

Kahrl, Fredrich; Roland-Holst, David

2008-01-01T23:59:59.000Z

411

Climate Change and National Security  

Science Conference Proceedings (OSTI)

Climate change is increasingly recognized as having national security implications, which has prompted dialogue between the climate change and national security communities—with resultant advantages and differences. Climate change research has ...

Elizabeth L. Malone

2013-01-01T23:59:59.000Z

412

The specification and estimation of technological change in electricity production  

SciTech Connect

This study focuses on the rate of technological change in electricity production. The dominant role of fossil fuel-fired electricity production in the industry, coupled with the direct association with the emission of greenhouse gases, makes technology parameters particularly significant for several reasons. First, very long-run simulations of energy-economic paths at a global level require that technical progress occupy a place in the methodology for sound formulations that are vital in global emissions/energy policy analysis. Second, given the outlook for electricity generation being predominately coal-based, especially in developing economies around the world, the specification and measurement of technical change is essential for developing realistic long-run technology forecasts. Finally, industry or sector growth in productivity hinges partly on technical progress, and updated analysis will always be necessary to stay abreast of developments on this front, as well as for economic growth considerations in general. This study is based on empirical economic research on production functions in the electric utility industry. However, it advances a seldom used approach, called the {open_quotes}engineering-production function{close_quotes}, in contrast to the more common neoclassical approach used by economists. Combined with this approach is a major departure from the type of data used to conduct econometric estimations of production parameters. This research draws upon a consistent set of ex ante or {open_quotes}blueprint{close_quotes} data that better reflects planned, technical performance and cost data elements, in contrast to the more customary, expect type of data from actual firm/plant operations. The results from the examination of coal-fired technologies indicate the presence of technical change. Using data for the period from 1979 to 1989, we find technical change to be capital-augmenting at the rate of 1.8 percent per year.

Kavanaugh, D.C.; Ashton, W.B.

1995-01-01T23:59:59.000Z

413

Chang-F-L  

NLE Websites -- All DOE Office Websites (Extended Search)

Effect of Droplet Size Distribution on the Effect of Droplet Size Distribution on the Determination of Cloud Droplet Effective Radius F.-L. Chang and Z. Li ESSIC/Department of Meteorology University of Maryland College Park, Maryland F.-L. Chang Canada Centre for Remote Sensing Ottawa, Ontario, Canada Introduction Cloud microphysical processes can provide links between cloud radiative effect and hydrological cycle and create several feedback mechanisms linking clouds and climate. For instance, the aerosols can affect the climate through their indirect effect on clouds, which modifies cloud microphysical properties and hence cloud radiative properties, proving an increase in cloud albedo and a net radiative cooling (Twomey et al. 1984; Charlson et al. 1992). The key microphysical parameters affecting both radiation

414

Climate change risk and response  

E-Print Network (OSTI)

Climate Change and Electricity Demand: Applying the NewClimate Change and Electricity Demand in California. ”Extreme Heat, and Electricity Demand in California. ”

Kahrl, Fredrich; Roland-Holst, David

2008-01-01T23:59:59.000Z

415

Frogs that change sex  

NLE Websites -- All DOE Office Websites (Extended Search)

Frogs that change sex Frogs that change sex Name: Mike A Smola Age: N/A Location: N/A Country: N/A Date: N/A Question: Why can frogs (some species) change sex? Replies: This is a complex subject. Several studies have exposed some of the answers to this question, but a definitive answer is yet to be made. It all boils down to the level of which genes are activated. Studies have shown that the sex chromosomes are not necessarily the determining factor. The traditional display of a female is when an individual has two X chromosomes present. When one of these genes is a Y, it is a male. This tends to be the case for most organisms that sport individuals that are different sexes. However, the Y chromosomes has been almost always a male determining chromosome, but with molecular biology and genetic engineering techniques, a male can be made from a XX combination and females have developed from XY combinations. These are extremely rare, but they have given insight to the fact that there are other factors beside X and Y chromosomes that determine sex, probably a gene found in both chromosomes.

416

Optimization of the design of DC-DC converters for improving the electromagnetic compatibility with the Front-End electronic for the super Large Hadron Collider Trackers  

E-Print Network (OSTI)

The upgrade of the Large Hadron Collider (LHC) experiments at CERN sets new challenges for the powering of the detectors. One of the powering schemes under study is based on DC-DC buck converters mounted on the front-end modules. The hard environmental conditions impose strict restrictions to the converters in terms of low volume, radiation and magnetic field tolerance. Furthermore, the noise emission of the switching converters must not affect the performance of the powered systems. A study of the sources and paths of noise of a synchronous buck converter has been made for identifying the critical parameters to reduce their emissions. As proof of principle, a converter was designed following the PCB layout considerations proposed and then used for powering a silicon strip module prototype for the ATLAS upgrade, in order to evaluate their compatibility.

Fuentes Rojas, Cristian Alejandro; Blanchot, G

2011-01-01T23:59:59.000Z

417

Comparison of nucleon form factors from lattice QCD against the light front cloudy bag model and extrapolation to the physical mass regime  

Science Conference Proceedings (OSTI)

We explore the possibility of extrapolating state of the art lattice QCD calculations of nucleon form factors to the physical regime. We find that the lattice results can be reproduced using the light front cloudy bag model by letting its parameters be analytic functions of the quark mass. We then use the model to extend the lattice calculations to large values of Q{sup 2} of interest to current and planned experiments. These functions are also used to define extrapolations to the physical value of the pion mass, thereby allowing us to study how the predicted zero in G{sub E}(Q{sup 2})/G{sub M}(Q{sup 2}) varies as a function of quark mass.

Matevosyan, Hrayr H.; Miller, Gerald A.; Thomas, Anthony W. [Louisiana State University, Department of Physics and Astronomy, 202 Nicholson Hall, Tower Dr., Baton Rouge, Louisiana 70803 (United States); and Thomas Jefferson National Accelerator Facility, 12000 Jefferson Ave., Newport News, Virginia 23606 (United States); University of Washington, Department of Physics, Box 351560, Seattle, Washington 98195-1560 (United States); Thomas Jefferson National Accelerator Facility, 12000 Jefferson Ave., Newport News, Virginia 23606 (United States)

2005-05-01T23:59:59.000Z

418

Development of a Front Tracking Method for Two-Phase Micromixing of Incompressible Viscous Fluids with Interfacial Tension in Solvent Extraction  

SciTech Connect

This progress report describes the development of a front tracking method for the solution of the governing equations of motion for two-phase micromixing of incompressible, viscous, liquid-liquid solvent extraction processes. The ability to compute the detailed local interfacial structure of the mixture allows characterization of the statistical properties of the two-phase mixture in terms of droplets, filaments, and other structures which emerge as a dispersed phase embedded into a continuous phase. Such a statistical picture provides the information needed for building a consistent coarsened model applicable to the entire mixing device. Coarsening is an undertaking for a future mathematical development and is outside the scope of the present work. We present here a method for accurate simulation of the micromixing dynamics of an aqueous and an organic phase exposed to intense centrifugal force and shearing stress. The onset of mixing is the result of the combination of the classical Rayleigh- Taylor and Kelvin-Helmholtz instabilities. A mixing environment that emulates a sector of the annular mixing zone of a centrifugal contactor is used for the mathematical domain. The domain is small enough to allow for resolution of the individual interfacial structures and large enough to allow for an analysis of their statistical distribution of sizes and shapes. A set of accurate algorithms for this application requires an advanced front tracking approach constrained by the incompressibility condition. This research is aimed at designing and implementing these algorithms. We demonstrate verification and convergence results for one-phase and unmixed, two-phase flows. In addition we report on preliminary results for mixed, two-phase flow for realistic operating flow parameters.

Zhou, Yijie [ORNL; Lim, Hyun-Kyung [ORNL; de Almeida, Valmor F [ORNL; Navamita, Ray [State University of New York, Stony Brook; Wang, Shuqiang [State University of New York, Stony Brook; Glimm, James G [ORNL; Li, Xiao-lin [State University of New York, Stony Brook; Jiao, Xiangmin [ORNL

2012-06-01T23:59:59.000Z

419

Continuous Change Institutional Change Principle | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Continuous Change Institutional Change Principle Continuous Change Institutional Change Principle Continuous Change Institutional Change Principle October 8, 2013 - 11:13am Addthis Because it takes time to establish institutional change, Federal agencies need multiyear plans that continuously work to achieve, reinforce, and improve significant and persistent sustainability goals. Sustainability efforts ultimately may fail unless organizational change becomes "the way we do business." This principle is in line with organization research showing that institutional change is a multiyear process. Methods Institutional change is a long process that requires patience and persistence. For instance, the trial period for a new behavior must be long enough to allow people to form new habits. The key is to think long-term

420

Enzymatic temperature change indicator  

DOE Patents (OSTI)

A temperature change indicator is described which is composed of an enzyme and a substrate for that enzyme suspended in a solid organic solvent or mixture of solvents as a support medium. The organic solvent or solvents are chosen so as to melt at a specific temperature or in a specific temperature range. When the temperature of the indicator is elevated above the chosen, or critical temperature, the solid organic solvent support will melt, and the enzymatic reaction will occur, producing a visually detectable product which is stable to further temperature variation.

Klibanov, Alexander M. (Newton, MA); Dordick, Jonathan S. (Iowa City, IA)

1989-01-21T23:59:59.000Z

Note: This page contains sample records for the topic "horsepower change front" 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

NIST Testimony on Climate Change  

Science Conference Proceedings (OSTI)

NIST Testimony on Climate Change. 2009. Monitoring, Measurement and Verification of Greenhouse Gas Emissions II: The ...

2010-10-05T23:59:59.000Z

422

Summary of Changes  

NLE Websites -- All DOE Office Websites (Extended Search)

to to Procedure 200.4 Records Management Revised Version Issued as P 200.4B LM Procedure 200.4, Records Management of 3/14/07 has undergone revisions. The procedure has been revised to reflect changes in definitions and formatting and to reflect LM's increased emphasis on electronic records. Please replace LM Procedure 200.4A with LM Procedure 200.4B. The most recent and official controlled hard copy version of this document resides with LM's Directives Coordinator. An electronic version of the controlled document has been placed on the LM Intranet for employee use. Printed hard copies of this electronic version are considered uncontrolled documents. INITIATED BY: Office of Business Operations NO. OF PAGES/ATTACHMENTS: 19 pages, 9 attachments

423

Study Climate and Global Change  

NLE Websites -- All DOE Office Websites (Extended Search)

What We Study How We Study Prepare The Nation For Change Assess the U.S. Climate Make Our Science Accessible Link Climate Change & Health Provide Data and Tools Coordinate Internationally Study Climate and Global Change Print E-mail Deforestation What is global change? "Global change" refers to changes in the global environment that may alter the capacity of the Earth to sustain life. This includes alterations in: Climate Land productivity Oceans or other water resources Atmospheric chemistry Ecological systems Demographic and socioeconomic trends What is global change research? According to the Global Change Research Act of 1990, "Global change research" refers to the study, monitoring, assessment, prediction, and information management activities used to describe and understand the:

424

ARM - Baseline Change Request Guidelines  

NLE Websites -- All DOE Office Websites (Extended Search)

DocumentsBaseline Change Request Guidelines DocumentsBaseline Change Request Guidelines Page Contents Introduction Submit a BCR BCR Process Flowchart Baseline Change Request Guidelines Introduction Baseline Change Requests (BCR) are used by the ARM Infrastructure as a process to provide configuration control and for formally requesting and documenting changes within the ARM Infrastructure. Configuration Control: BCRs are required for changes to instruments, data systems, data processes, datastreams, measurement methods, and facilities. They help ensure that all aspects of the ARM Infrastructure are consulted prior to implementing changes. Seemingly minor changes can have significant repercussions throughout the Facility and therefore, NO change to an operational instrument, computer, facility, or other system can or will be

425

Climate Change | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Climate Change Climate Change November 19, 2013 Statement on U.S. Secretary of Energy Ernest Moniz's Travel to Istanbul, Turkey U.S. Secretary of Energy Ernest Moniz will travel to...

426

Tropical Cyclones and Climate Change  

E-Print Network (OSTI)

Whether the characteristics of tropical cyclones have changed or will change in a warming climate — and if so, how — has been the subject of considerable investigation, often with conflicting results. Large amplitude ...

Knutson, Thomas R.

427

The Atlantic Climate Change Program  

Science Conference Proceedings (OSTI)

The Atlantic Climate Change Program (ACCP) is a component of NOAA's Climate and Global Change Program. ACCP is directed at determining the role of the thermohaline circulation of the Atlantic Ocean on global atmospheric climate. Efforts and ...

Robert L. Molinari; David Battisti; Kirk Bryan; John Walsh

1994-07-01T23:59:59.000Z

428

Climate change risk and response  

E-Print Network (OSTI)

electricity rates and expenditures that accompany these changes may not be as well. Most of the state’

Kahrl, Fredrich; Roland-Holst, David

2008-01-01T23:59:59.000Z

429

Climate Change and Aluminum - TMS  

Science Conference Proceedings (OSTI)

Jun 25, 2008 ... Softcover book: Carbon Dioxide Reduction Metallurgy. Knowledge Product: Sustainability, Climate Change, and Greenhouse Gas Emissions ...

430

Experimental investigation into the effect of reformer gas addition on flame speed and flame front propagation in premixed, homogeneous charge gasoline engines  

SciTech Connect

The effect of reformer gas addition to gasoline in internal combustion engines is assessed based on in-cylinder measurement techniques. These include ion sensors, an optical spark plug and heat release analysis from the cylinder pressure. A detailed analysis of these measurements is presented, giving insight into the combustion process and into the energy release. The flame front shape and propagation in the combustion chamber are reconstructed and the flame speed is estimated. The laminar flame speed has been observed to increase linearly with the energy fraction of reformer gas in the fuel blend. From pure gasoline to pure reformer gas the laminar flame speed increases by a factor of 4.4. The relative increase in the turbulent flame speed is lower. These results confirm what can be observed from the heat release analysis, that reformer gas addition mainly shortens the first phase of the combustion process. Different reformer gas compositions were tested, varying the ratio of hydrogen to inert species. Finally, flame propagation and flame speed at EGR-burn limit and at lean-burn limit are investigated. (author)

Conte, Enrico; Boulouchos, Konstantinos [Aerothermochemistry and Combustion Systems Laboratory (LAV), ETH Zurich, CH-8092 (Switzerland)

2006-07-15T23:59:59.000Z

431

Fast-wave Power Flow Along SOL Field Lines In NSTX nd The Associated Power Deposition Profile Across The SOL In Front Of The Antenna  

SciTech Connect

Fast-wave heating and current drive efficiencies can be reduced by a number of processes in the vicinity of the antenna and in the scrape off layer (SOL). On NSTX from around 25% to more than 60% of the high-harmonic fast-wave power can be lost to the SOL regions, and a large part of this lost power flows along SOL magnetic field lines and is deposited in bright spirals on the divertor floor and ceiling. We show that field-line mapping matches the location of heat deposition on the lower divertor, albeit with a portion of the heat outside of the predictions. The field-line mapping can then be used to partially reconstruct the profile of lost fast-wave power at the midplane in front of the antenna, and the losses peak close to the last closed flux surface (LCFS) as well as the antenna. This profile suggests a radial standing-wave pattern formed by fast-wave propagation in the SOL, and this hypothesis will be tested on NSTX-U. Advanced RF codes must reproduce these results so that such codes can be used to understand this edge loss and to minimize RF heat deposition and erosion in the divertor region on ITER.

Perkins, Roy

2013-06-21T23:59:59.000Z

432

Climate Change | Department of Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

Climate Change Climate Change Climate Change The Office of Climate Change Policy and Technology (PI-50), located within the Office of Policy and International Affairs (PI), serves as the focal point within the U.S. Department of Energy (DOE) for the development, coordination, and implementation of DOE-related aspects of climate change technical programs, policies, and initiatives. The mission of the Office of Climate Change Policy and Technology is to accelerate the development and deployment of advanced technologies and best practices to mitigate climate change. To the extent delegated by the Secretary, the Office provides planning, analysis, and technical advisory services to other Federal agencies, and to Cabinet and sub-Cabinet-level interagency committees, working on climate

433

ARM - Engineering Change Request & Engineering Change Order Guidelines  

NLE Websites -- All DOE Office Websites (Extended Search)

Change Request & Change Request & Engineering Change Order Guidelines Page Contents: Guideline for Starting a Request for a New ARM Product, Capability, or Functionality Engineering Task Tracking Tool Tracking Capabilities Getting Closure, the Baseline Change Request Glossary Engineering Change Request & Engineering Change Order Guidelines Requesting Engineered Products and Services in ARM Guideline for Starting a Request for a New ARM Product, Capability, or Functionality The purpose of this guideline is to establish a method that members of the ARM Infrastructure team may use to submit requests for products and services from the ARM Engineering Group. The concept of "new product, capability, or functionality" refers to the idea that requests the ARM Infrastructure Team to make to the Engineering Group that will ultimately

434

climate change | OpenEI  

Open Energy Info (EERE)

climate change climate change Dataset Summary Description This dataset, made available by the UK Department of Energy and Climate Change (DECC), presents summer and winter precipitation for England and Wales, and the percent change from the baseline (1961 - 1990 average). The original source of the data is the Hadley Centre. Source UK Department of Energy and Climate Change (DECC) Date Released March 12th, 2010 (4 years ago) Date Updated Unknown Keywords climate change precipitation UK Data application/vnd.ms-excel icon 1 Excel file: Precipitation, 1874 - 2009 (xls, 68.1 KiB) Quality Metrics Level of Review Some Review Comment (Does not have "National Statistics" status) Temporal and Spatial Coverage Frequency Time Period 1874 - 2009 License License Other or unspecified, see optional comment below

435

Climate Change | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Climate Change Climate Change Climate Change View our interactive climate vulnerability map to learn more about how climate change could impact energy supplies and delivery near your home. | Map by Daniel Wood, Energy Department. View our interactive climate vulnerability map to learn more about how climate change could impact energy supplies and delivery near your home. | Map by Daniel Wood, Energy Department. Addressing the effects of climate change is a top priority of the Energy Department. As global temperature rise, wildfires, drought and high electricity demand put stress on the nation's energy infrastructure. And severe weather -- the leading cause of power outages and fuel supply disruption in the United States -- is projected to worsen,

436

Renewable Energy and Climate Change  

NLE Websites -- All DOE Office Websites (Extended Search)

Renewable Energy and Climate Change Symposium in Honor of 2009 and 2010 ACS Fellows in the Industrial and Engineering Chemistry Division Helena Chum, NREL Research Fellow August...

437

Climate change risk and response  

E-Print Network (OSTI)

basket, changes in electricity rates can have far-reachingand assuming constant electricity rates, Auffhammer (2008)a rise (30 percent) in electricity rates in 2020 and 2040

Kahrl, Fredrich; Roland-Holst, David

2008-01-01T23:59:59.000Z

438

Life-Changing Drug Design  

NLE Websites -- All DOE Office Websites (Extended Search)

facilities are aimed at designing more effective drugs with fewer side effects. Life-Changing Drug Design One notable example is vemurafenib, a drug designed by...

439

Changes in dimethyl sulfide oceanic distribution due to climate change  

SciTech Connect

Dimethyl sulfide (DMS) is one of the major precursors for aerosols and cloud condensation nuclei in the marine boundary layer over much of the remote ocean. Here we report on coupled climate simulations with a state-of-the-art global ocean biogeochemical model for DMS distribution and fluxes using present-day and future atmospheric CO{sub 2} concentrations. We find changes in zonal averaged DMS flux to the atmosphere of over 150% in the Southern Ocean. This is due to concurrent sea ice changes and ocean ecosystem composition shifts caused by changes in temperature, mixing, nutrient, and light regimes. The largest changes occur in a region already sensitive to climate change, so any resultant local CLAW/Gaia feedback of DMS on clouds, and thus radiative forcing, will be particularly important. A comparison of these results to prior studies shows that increasing model complexity is associated with reduced DMS emissions at the equator and increased emissions at high latitudes.

Elliott, Scott [Los Alamos National Laboratory (LANL); Erickson III, David J [ORNL

2011-01-01T23:59:59.000Z

440

Changes in Dimethyl Sulfide Oceanic Distribution due to Climate Change  

SciTech Connect

Dimethyl sulfide (DMS) is one of the major precursors for aerosols and cloud condensation nuclei in the marine boundary layer over much of the remote ocean. Here they report on coupled climate simulations with a state-of-the-art global ocean biogeochemical model for DMS distribution and fluxes using present-day and future atmospheric CO{sub 2} concentrations. They find changes in zonal averaged DMS flux to the atmosphere of over 150% in the Southern Ocean. This is due to concurrent sea ice changes and ocean ecosystem composition shifts caused by changes in temperature, mixing, nutrient, and light regimes. The largest changes occur in a region already sensitive to climate change, so any resultant local CLAW/Gaia feedback of DMS on clouds, and thus radiative forcing, will be particularly important. A comparison of these results to prior studies shows that increasing model complexity is associted with reduced DMS emissions at the equator and increased emissions at high latitudes.

Cameron-Smith, P; Elliott, S; Maltrud, M; Erickson, D; Wingenter, O

2011-02-16T23:59:59.000Z

Note: This page contains sample records for the topic "horsepower change front" 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

Prepare The Nation For Change  

NLE Websites -- All DOE Office Websites (Extended Search)

Prepare The Nation For Change Print E-mail What Is Adaptation and Mitigation? Adaptation An adjustment in natural and/or human systems to a new or changing environment that exploits beneficial opportunities and moderates negative impacts. Mitigation An intervention to reduce the sources or enhance the sinks of greenhouse gases and other climate warming agents. This intervention could include approaches devised to: reduce emissions of greenhouse gases to the atmosphere to enhance their removal from the atmosphere through storage in geological formations, soils, biomass, or the ocean How do we prepare for global change? Global change is affecting many aspects of society, livelihoods, and the environment. Across the United States and around the world, people are making decisions to effectively minimize (mitigate) and prepare for (adapt) global change.

442

Climate Change Science Institute | Clean Energy | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Climate Change Science Institute SHARE Climate Change Science Institute To advance understanding of the Earth system, describe the consequences of climate change, and evaluate and...

443

Appendix C. Changes to the API  

Science Conference Proceedings (OSTI)

... OOF2: The Manual. Appendix C. Changes to the API. Prev, Appendix C. Changes to the API. Table of Contents. C.1. Changes ...

2013-08-23T23:59:59.000Z

444

Global Environmental Change and Human Security  

E-Print Network (OSTI)

with human rights, human security or environmental change ifEnvironmental Change and Human Security By Matthew, RichardChange and Human Security. Cambridge, Massachusetts &

Kunnas, Jan

2011-01-01T23:59:59.000Z

445

THE 2011 FEBRUARY 15 X2 FLARE, RIBBONS, CORONAL FRONT, AND MASS EJECTION: INTERPRETING THE THREE-DIMENSIONAL VIEWS FROM THE SOLAR DYNAMICS OBSERVATORY AND STEREO GUIDED BY MAGNETOHYDRODYNAMIC FLUX-ROPE MODELING  

SciTech Connect

The 2011 February 15 X2.2 flare and associated Earth-directed halo coronal mass ejection were observed in unprecedented detail with high resolution in spatial, temporal, and thermal dimensions by the Atmospheric Imaging Assembly (AIA) on the Solar Dynamics Observatory, as well as by instruments on the two STEREO spacecraft, then at near-quadrature relative to the Sun-Earth line. These observations enable us to see expanding loops from a flux-rope-like structure over the shearing polarity-inversion line between the central {delta}-spot groups of AR 11158, developing a propagating coronal front ('EIT wave'), and eventually forming the coronal mass ejection moving into the inner heliosphere. The observations support the interpretation that all of these features, including the 'EIT wave', are signatures of an expanding volume traced by loops (much larger than the flux rope only), surrounded by a moving front rather than predominantly wave-like perturbations; this interpretation is supported by previously published MHD models for active-region and global scales. The lateral expansion of the eruption is limited to the local helmet-streamer structure and halts at the edges of a large-scale domain of connectivity (in the process exciting loop oscillations at the edge of the southern polar coronal hole). The AIA observations reveal that plasma warming occurs within the expansion front as it propagates over quiet Sun areas. This warming causes dimming in the 171 A (Fe IX and Fe X) channel and brightening in the 193 and 211 A (Fe XII-XIV) channels along the entire front, while there is weak 131 A (Fe VIII and Fe XXI) emission in some directions. An analysis of the AIA response functions shows that sections of the front running over the quiet Sun are consistent with adiabatic warming; other sections may require additional heating which MHD modeling suggests could be caused by Joule dissipation. Although for the events studied here the effects of volumetric expansion are much more obvious than true wave phenomena, we discuss how different magnetic environments within and around the erupting region can lead to the signatures of either or both of these aspects.

Schrijver, Carolus J.; Title, Alan M. [Lockheed Martin Advanced Technology Center, 3251 Hanover Street, Palo Alto, CA 94304 (United States); Aulanier, Guillaume; Pariat, Etienne; Delannee, Cecile, E-mail: schrijver@lmsal.com, E-mail: title@lmsal.com, E-mail: guillaume.aulanier@obspm.fr, E-mail: etienne.pariat@obspm.fr, E-mail: ceaulanier@voila.fr [LESIA, Observatoire de Paris, CNRS, UPMC, Universite Paris Diderot, 5 Place Jules Janssen, 92190 Meudon (France)

2011-09-10T23:59:59.000Z

446

Change in Pacific nitrogen content tied to climate change  

NLE Websites -- All DOE Office Websites (Extended Search)

4 4 For immediate release: 12/15/2013 | NR-13-12-04 High Resolution Image Living and fossilized coral are gathered from dives in the Hawaiian Islands. A Lawrence Livermore scientist and collaborators have studied coral to determine that a long-term shift in nitrogen content in the Pacific Ocean has occurred as a result of climate change. Image courtesy of NOAA Hawaii Undersea Research Laboratory. Change in Pacific nitrogen content tied to climate change Anne M Stark, LLNL, (925) 422-9799, stark8@llnl.gov Using deep sea corals gathered near the Hawaiian Islands, a Lawrence Livermore scientist, in collaboration with UC Santa Cruz colleagues, has determined that a long-term shift in nitrogen content in the Pacific Ocean has occurred as a result of climate change.

447

Climate ChangeClimate Change and Runoff Managementand Runoff Management  

E-Print Network (OSTI)

% ) Radiated by atmosphere as heat (66%) Heat radiated by the earth Heat Troposphere Lower Stratosphere (ozone · Result: a statistical range of probable climate change GCM grid Downscaled (8x8 km) grid D. Vimont, UW

Sheridan, Jennifer

448

Ocean fronts in the Southern California Current System and their role in structuring zooplankton distributions, diel vertical migration, and size composition  

E-Print Network (OSTI)

Gyre Oscillation links ocean climate and ecosystem change.Journal of Geophysical Research-Oceans 116: C02026, doi:bright future lays ahead for ocean research, if we choose to

Powell, Jesse Russell

449

Frequently Asked Global Change Questions  

NLE Websites -- All DOE Office Websites (Extended Search)

Asked Global Change Questions Asked Global Change Questions This page lists global change questions that have been received at CDIAC and the answers that were provided to a diverse audience. If you have a question relating to carbon dioxide and global change and cannot find the answer you need here, you can "Ask Us a Question", and we will be glad to try to help you. Questions Should we grow trees to remove carbon in the atmosphere? What are the present tropospheric concentrations, global warming potentials (100 year time horizon), and atmospheric lifetimes of CO2, CH4, N2O, CFC-11, CFC-12, CFC-113, CCl4, methyl chloroform, HCFC-22, sulphur hexafluoride, trifluoromethyl sulphur pentafluoride, perfluoroethane, and surface ozone? Where can I find information on the naming of halocarbons?

450

Building Regulatory Capacity for Change  

NLE Websites -- All DOE Office Websites (Extended Search)

Regulatory Capacity for Change PRESENTED BY Sarah Spencer-Workman, LEED AP July 27, 2011 "How to identify and review laws relevant to buildings and find places and opportunities...

451

Nature Climate Change features Los  

NLE Websites -- All DOE Office Websites (Extended Search)

Nature Climate Change features Los Alamos forest research February 27, 2013 New print edition of journal tags tree-stress project for cover story LOS ALAMOS, N.M., Feb. 27,...

452

Marathon pacing and elevation change  

E-Print Network (OSTI)

An analysis of marathon pacing and elevation change is presented. It is based on an empirical observation of how the pace of elite and non-elite marathon runners change over the course of the marathon and a simple approximation of the energy cost of ascent and decent. It was observed that the pace of the runners slowed in a regular manner that could be broken up into four regions. That observation can be used to project target paces for a desired marathon finish time. However, that estimate fails to take in to account the energetic costs of elevation changes (hills) along the marathon course. Several approximations are made to give a coarse estimate of target paces for marathon run on courses with significant elevation changes, i.e. a hilly course. The 2012 Oakland Marathon course is used as and example of a hilly course and the times of 23 finishers are examined.

Elliott, J B

2012-01-01T23:59:59.000Z

453

Climate Change - The Way Forward  

NLE Websites -- All DOE Office Websites (Extended Search)

Carbon Sequestration Washington, DC May 14 -17, 2001 Concerns that the continued use of fossil fuels will in some way cause adverse changes to the world's climate can be...

454

book review: Climate change mapped  

E-Print Network (OSTI)

6596  news and update  book review  Climate change mapped atlas is more than just a book of maps.  By  that criterion than  just  a  science  book.   It  also covers climate 

Shanahan, Mike

2012-01-01T23:59:59.000Z

455

Building Regulatory Capacity for Change  

NLE Websites -- All DOE Office Websites (Extended Search)

Regulatory Capacity for Regulatory Capacity for Change PRESENTED BY Sarah Spencer-Workman, LEED AP July 27, 2011 "How to identify and review laws relevant to buildings and find places and opportunities that can accept changes that would support building energy objectives" Presentation Highlights Rulemaking Community and Stakeholder Identification To Support Code Changes Engagement: Building Capacity for Change Pay It Forward RULEMAKING : Plan Development and Research of Laws Relevant to Buildings How is it conducted? 'Landscape' Review Key words or phrases to look for Identify "home rule" jurisdictions Update and review cycle built in 'Landscape' Review:

456

Inducing Transformational Energy Technological Change  

Science Conference Proceedings (OSTI)

Reducing risks of severe climate change in the latter part of the 20th Century is likely to require not only incremental improvements in known energy technologies, but the discovery of transformational new energy technologies. This paper reviews current knowledge about both demand and supply aspects of the challenge of accelerating transformational change, considering both economic and policy incentives, including targeted government funding of research and development, and several other schools of thought about drivers of scientific discovery and innovation.

Wilbanks, Thomas J [ORNL

2011-01-01T23:59:59.000Z

457

EPA 40CFR194 Changes  

NLE Websites -- All DOE Office Websites (Extended Search)

NOTIFICATION OF PLANNED CHANGE TO THE EPA NOTIFICATION OF PLANNED CHANGE TO THE EPA 40 CFR PART 194 CERTIFICATION OF THE WASTE ISOLATION PILOT PLANT REMOTE-HANDLED TRANSURANIC WASTE CHARACTERIZATION PLAN April 30, 2003 U.S. DEPARTMENT OF ENERGY CARLSBAD FIELD OFFICE i Table of Contents Acronyms and Abbreviations ........................................................................................................ iii 1.0 Introduction..........................................................................................................................1 2.0 Nature and Scope .................................................................................................................3 2.1 Overview..........................................................................................................................

458

Basic science of climate change  

SciTech Connect

Anthropogenic emissions of greenhouse gases are enhancing the natural greenhouse effect. There is almost universal agreement in the scientific community that this will lead to a warming of the lower atmosphere and of the earth's surface. However, the exact timing, magnitude, and regional distribution of this future warming are very uncertain. Merely taking account of changes in the global mean climate is not enough, especially when considering the impacts of climate change. Man also have to consider the rate and regional distribution of climate change and changes in the frequency of events. An increase in the frequency of extremes, such as droughts and storms, and rapid climate change are two factors which could have dramatic effects on human society and natural ecosystems. However, systems already under stress or close to their climate limits are likely to experience the greatest difficulty in adapting to change. Although human activity has been increasing greenhouse gas concentrations for a hundred years, man cannot yet detect unequivocally a greenhouse gas induced signal in climate records. However, increases in greenhouse gas concentrations are almost bound to continue and are likely to emerge as the dominant perturbation of the earth's climate in the coming decades.

Maskell, K.; Callander, B.A. (Hadley Centre, Bracknell (United Kingdom)); Mintzer, I.M. (Univ. of Maryland, College Park, MD (United States))

1993-10-23T23:59:59.000Z

459

Measurements and Standards for the Climate Change ...  

Science Conference Proceedings (OSTI)

Measurements and Standards for the Climate Change Science Program (+$5 million). ... Shutterstock. Challenge. The climate is changing. ...

2010-10-05T23:59:59.000Z

460

PNNL: Atmospheric Sciences & Global Change - Frontiers in Global Change  

NLE Websites -- All DOE Office Websites (Extended Search)

Frontiers in Global Change Frontiers in Global Change Dr. Thanos Nenes Dr. Thanos Nenes Aerosol-Cloud Interactions: The Elusive Component of Climate Change Dr. Thanos Nenes Professor & Georgia Power Faculty Scholar, School of Earth & Atmospheric Sciences, School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA Thursday, August 1, 2013 EMSL Auditorium 10:00AM The effect of human activities on climate is one of the most important issues facing society. Humans influence climate in many ways. Emissions of greenhouse gases (GHGs) tend to warm climate, by reducing the amount of infrared radiation that is emitted to space. Increased levels of suspended atmospheric particles ("aerosols") exert a net cooling effect by directly scattering and absorption of solar radiation (the "aerosol direct climatic

Note: This page contains sample records for the topic "horsepower change front" 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

Educational Global Climate Change Links  

NLE Websites -- All DOE Office Websites (Extended Search)

Educational Global Climate Change Links Educational Global Climate Change Links Evidence of the importance of global climate change to the future generation is reflected in the increasing number of queries CDIAC receives from students and educators, from a range of educational levels. We have compiled a listing of some sites that we hope will be of interest and of use to those looking for information, fun, ideas, and ways that they can make a difference. These links were chosen because we have found them useful in responding to those with inquiring minds. These links will take the user outside of CDIAC, and are by no means comprehensive. We are not responsible for the content or intent of these outside links. Tools you can use! NOAA's Global Climate Dashboard - The Global Climate Dashboard is

462

Abrupt Climate Change Scenario Technologies  

NLE Websites -- All DOE Office Websites (Extended Search)

Abrupt Climate Change Scenario Technologies Abrupt Climate Change Scenario Technologies Speaker(s): Tina Kaarsberg Date: April 27, 2006 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Jayant Sathaye This talk examines the potential for several types of technologies that hitherto have not been a focus of U.S. climate technology planning. It was inspired by the latest climate science data and modeling which suggest that an abrupt warming (+10oF in 10 years), is an increasingly plausible scenario. The technologies described in the session rapidly reduce the risk of climate change and increase our ability to respond quickly. All of the technologies also have other public benefits. (Summary follows): For more information about this seminar, please contact: JoAnne Lambert 510.486.4835, or send e-mail to JMLambert@lbl.gov

463

Renewable Energy and Climate Change  

SciTech Connect

The Intergovernmental Panel on Climate Change issued the Special Report on Renewable Energy Sources and Climate Change Mitigation (SRREN) at http://srren.ipcc-wg3.de/ (May 2011 electronic version; printed form ISBN 978-1-107-60710-1, 2012). More than 130 scientists contributed to the report.* The SRREN assessed existing literature on the future potential of renewable energy for the mitigation of climate change within a portfolio of mitigation options including energy conservation and efficiency, fossil fuel switching, RE, nuclear and carbon capture and storage (CCS). It covers the six most important renewable energy technologies - bioenergy, direct solar, geothermal, hydropower, ocean and wind, as well as their integration into present and future energy systems. It also takes into consideration the environmental and social consequences associated with these technologies, the cost and strategies to overcome technical as well as non-technical obstacles to their application and diffusion.

Chum, H. L.

2012-01-01T23:59:59.000Z

464

Did 1998 Reflect Structural Change?  

Gasoline and Diesel Fuel Update (EIA)

Did 1998 Reflect Structural Change? Did 1998 Reflect Structural Change? 5/17/99 Click here to start Table of Contents PPT Slide Did 1998 Reflect Structural Change? Demand U.S. Propane Demand Sectors (1996) PPT Slide 1998 Propane Prices Fell with Crude Oil PPT Slide Warm Weather Behind Demand Decline 1998 Warm Weather Kept Demand Down Supply Propane Production Fell in 1998 1998 Propane Net Imports Increased Algeria Was Major Source of ‘98 Import Increase U.S. Chemical Use & Large Storage Attracts Excess Propane Petroleum & Propane Market Over Supply Average Stock Levels: Crude Market & Propane Futures Market Incentives to Build Petroleum Stocks New “Structure” or Cycle? Near-Term Future Large January Draw Did Not Remove Excess How Might Excess Stocks Decline? Near Term U.S. Propane Production

465

Reading Comprehension - Properties and Changes  

NLE Websites -- All DOE Office Websites (Extended Search)

Properties and Changes Properties and Changes Matter can be described and identified by physical and chemical properties. Physical _________ chemicals properties substances textures have to do with appearance. You can observe many physical properties with your senses and by measuring the length, _________ width density height property , height, mass and density of a substance. _________ Chemical Matter Described Physical properties include color, shape, smell, texture, taste and size. The state of matter (whether it's a solid, _________ water molecule liquid atom , or gas) and the _________ time temperature design cylinder at which the substance boils, melts or freezes are also physical properties. Magnetic properties are physical properties as well. _________ Chemical Physical Substance Gaseous properties, on the other

466

Climate Change: The Sun's Role  

E-Print Network (OSTI)

The sun's role in the earth's recent warming remains controversial even though there is a good deal of evidence to support the thesis that solar variations are a very significant factor in driving climate change both currently and in the past. This precis lays out the background and data needed to understand the basic scientific argument behind the contention that variations in solar output have a significant impact on current changes in climate. It also offers a simple, phenomenological approach for estimating the actual-as opposed to model dependent-magnitude of the sun's influence on climate.

Marsh, Gerald E

2007-01-01T23:59:59.000Z

467

Climate Change: The Sun's Role  

E-Print Network (OSTI)

The sun's role in the earth's recent warming remains controversial even though there is a good deal of evidence to support the thesis that solar variations are a very significant factor in driving climate change both currently and in the past. This precis lays out the background and data needed to understand the basic scientific argument behind the contention that variations in solar output have a significant impact on current changes in climate. It also offers a simple, phenomenological approach for estimating the actual-as opposed to model dependent-magnitude of the sun's influence on climate.

Gerald E. Marsh

2007-06-23T23:59:59.000Z

468

Global change: Acronyms and abbreviations  

SciTech Connect

This list of acronyms and abbreviations is compiled to provide the user with a ready reference to dicipher the linguistic initialisms and abridgements for the study of global change. The terms included in this first edition were selected from a wide variety of sources: technical reports, policy documents, global change program announcements, newsletters, and other periodicals. The disciplinary interests covered by this document include agriculture, atmospheric science, ecology, environmental science, oceanography, policy science, and other fields. In addition to its availability in hard copy, the list of acronyms and abbreviations is available in DOS-formatted diskettes and through CDIAC`s anonymous File Transfer Protocol (FTP) area on the Internet.

Woodard, C.T. [Oak Ridge National Lab., TN (United States); Stoss, F.W. [Univ. of Tennessee, Knoxville, TN (United States). Energy, Environment and Resources Center

1995-05-01T23:59:59.000Z

469

Quick-change filter cartridge  

DOE Patents (OSTI)

A quick-change filter cartridge. In sampling systems for measurement of airborne materials, a filter element is introduced into the sampled airstream such that the aerosol constituents are removed and deposited on the filter. Fragile sampling media often require support in order to prevent rupture during sampling, and careful mounting and sealing to prevent misalignment, tearing, or creasing which would allow the sampled air to bypass the filter. Additionally, handling of filter elements may introduce cross-contamination or exposure of operators to toxic materials. Moreover, it is desirable to enable the preloading of filter media into quick-change cartridges in clean laboratory environments, thereby simplifying and expediting the filter-changing process in the field. The quick-change filter cartridge of the present invention permits the application of a variety of filter media in many types of instruments and may also be used in automated systems. The cartridge includes a base through which a vacuum can be applied to draw air through the filter medium which is located on a porous filter support and held there by means of a cap which forms an airtight seal with the base. The base is also adapted for receiving absorbing media so that both particulates and gas-phase samples may be trapped for investigation, the latter downstream of the aerosol filter.

Rodgers, John C. (Santa Fe, NM); McFarland, Andrew R. (College Station, TX); Ortiz, Carlos A. (Bryan, TX)

1995-01-01T23:59:59.000Z

470

INDUSTRY COMPOSITION CHANGES AND WAGES ?  

E-Print Network (OSTI)

In this paper I use longitudinal data to study the effects of changes in industrial composition on wages during the 1970s and 1980s. I find that over ten year periods, workers who are initially in industries that subsequently expand have faster wage growth. Also, wage growth is strongly related to employment changes in industries the individual is likely to move to. These effects are larger during the 1980s than earlier in the sample period. I use the estimates to evaluate the role played by industrial composition changes in affecting relative wages during the 1980s. I find that changes in industrial composition can account for all of the increase in the wages of women relative to men and about 40-50 percent of the increase in the relative wage of more educated groups. These estimates are larger than estimates in the literature derived from analysis of repeated cross sections. I thank Janet Currie, Joe Hotz, Guido Imbens, and Kanika Kapur for helpful conversations.

Paul J. Devereux

2001-01-01T23:59:59.000Z

471

Experiment 7: Heat Phase Changes  

E-Print Network (OSTI)

Experiment 7: Heat Phase Changes Matter has 4 phases or states: solid, liquid, gas, and plasma. This lab looks at the phase transitions from solid to liquid to gas. 1. Obtain the following materials: 600mL beaker of ice, thermometer, hot plate, timer. 2. Add a very small amount of water to the ice so

Peterson, Blake R.

472

Implications of Climate Change for  

E-Print Network (OSTI)

in prevailing wind direction, wind force and mean sea levels. Some modern high-speed vessels cannot operate. Changes in rainfall, temperature, wind regime and sea level increase the risk of losses in almost every wind loadings on buildings and driving rain could lead to more structural damage Energy · increased use

473

Additional patterns for fearless change  

Science Conference Proceedings (OSTI)

The patterns in this collection are an addition to those that appeared in our book Fearless Change: Patterns for Introducing New Ideas (Manns & Rising, 2005). Our passion for this topic didn't end when the book was published. Rather, we continued ...

Mary Lynn Manns; Linda Rising

2008-10-01T23:59:59.000Z

474

China: Changing Wood Products Markets  

E-Print Network (OSTI)

#12;China: Changing Wood Products Markets less is probably known about the forestry and wood products market in China than most other U.S. trading partners. In the 1980s China emerged as the world,11,12). However, U.S. wood products exports to China declined nearly 93 percent from 1988 to 1996, from $-I%3

Zhang, Daowei

475

IDRISI Land Change Modeler | Open Energy Information  

Open Energy Info (EERE)

IDRISI Land Change Modeler IDRISI Land Change Modeler Jump to: navigation, search Tool Summary LAUNCH TOOL Name: IDRISI Land Change Modeler Agency/Company /Organization: Clark Labs Sector: Land Focus Area: Agriculture, Forestry Topics: Co-benefits assessment, - Environmental and Biodiversity, Resource assessment Resource Type: Maps, Software/modeling tools User Interface: Desktop Application Website: www.clarklabs.org/ Cost: Paid IDRISI Land Change Modeler Screenshot References: IDRISI Land Change Modeler[1] Overview "The Land Change Modeler is revolutionary land cover change analysis and prediction software with tools to analyze, measure and project the impacts of such change on habitat and biodiversity." References ↑ "IDRISI Land Change Modeler" Retrieved from

476

A Dynamical Systems Model for Language Change  

E-Print Network (OSTI)

Formalizing linguists' intuitions of language change as a dynamical system, we quantify the time course of language change including sudden vs. gradual changes in languages. We apply the computer model to the historical ...

Niyogi, Partha

1995-12-01T23:59:59.000Z

477

CLIMATE CHANGE IMPACTS ON CALIFORNIA VEGETATION  

E-Print Network (OSTI)

CLIMATE CHANGE IMPACTS ON CALIFORNIA VEGETATION: PHYSIOLOGY, LIFE HISTORY, AND ECOSYSTEM many ecosystem services, including carbon storage, soil retention, and water cycling. One in dominant vegetation, often termed state change, will occur. The complex nature of state change requires

478

Changes for the 2012 CBECS  

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

for the 2012 CBECS for the 2012 CBECS The proposed design, procedures, and forms for the 2012 CBECS reflect a number of changes from the 2007 CBECS. These changes include:  The sample size for the 2012 CBECS will be 50 percent larger relative to the previous CBECS. The increase in sample size will allow for: o Fewer suppressed cells in published tables, o Better capture of emerging energy phenomena, such as new technologies for on- site electricity generation, o Lower relative standard errors for key statistics for publishable sample domains, o More publishable data for more principal building activities, and o More releasable microdata on the public use dataset.  A portion of the 2012 CBECS interviews will be conducted by telephone. Previous CBECS

479

BNL | Chang-Jun Liu  

NLE Websites -- All DOE Office Websites (Extended Search)

Chang-Jun Liu Chang-Jun Liu Research Interests Our research interests center on understanding the biosynthesis of plant phenylpropanoids, the molecular mechanisms underlying their metabolic regulation, as well as the biogenesis of cell wall lignocelluloses. Phenylpropanoids represent a large family of secondary metabolites. Their biosyntheses in terrestrial plants lead to the formation of a variety of phenolics and polyphenolics with diverse biological activities. For example, as a cell wall component, lignin imparts structural integrity to plant vasculature for water conductance and plant strength; as signaling molecules or phytoalexins, flavonoids and isoflavonoids modulate plant-environmental interactions or defense against phytopathogen infection; as cross-linker, phenolic esters bound to the cell wall

480

Radiative Forcing of Climate Change  

SciTech Connect

Chapter 6 of the IPCC Third Assessment Report Climate Change 2001: The Scientific Basis. Sections include: Executive Summary 6.1 Radiative Forcing 6.2 Forcing-Response Relationship 6.3 Well-Mixed Greenhouse Gases 6.4 Stratospheric Ozone 6.5 Radiative Forcing By Tropospheric Ozone 6.6 Indirect Forcings due to Chemistry 6.7 The Direct Radiative Forcing of Tropospheric Aerosols 6.8 The Indirect Radiative Forcing of Tropospheric Aerosols 6.9 Stratospheric Aerosols 6.10 Land-use Change (Surface Albedo Effect) 6.11 Solar Forcing of Climate 6.12 Global Warming Potentials hydrocarbons 6.13 Global Mean Radiative Forcings 6.14 The Geographical Distribution of the Radiative Forcings 6.15 Time Evolution of Radiative Forcings Appendix 6.1 Elements of Radiative Forcing Concept References.

Ramaswamy, V.; Boucher, Olivier; Haigh, J.; Hauglustaine, D.; Haywood, J.; Myhre, G.; Nakajima, Takahito; Shi, Guangyu; Solomon, S.; Betts, Robert E.; Charlson, R.; Chuang, C. C.; Daniel, J. S.; Del Genio, Anthony D.; Feichter, J.; Fuglestvedt, J.; Forster, P. M.; Ghan, Steven J.; Jones, A.; Kiehl, J. T.; Koch, D.; Land, C.; Lean, J.; Lohmann, Ulrike; Minschwaner, K.; Penner, Joyce E.; Roberts, D. L.; Rodhe, H.; Roelofs, G.-J.; Rotstayn, Leon D.; Schneider, T. L.; Schumann, U.; Schwartz, Stephen E.; Schwartzkopf, M. D.; Shine, K. P.; Smith, Steven J.; Stevenson, D. S.; Stordal, F.; Tegen, I.; van Dorland, R.; Zhang, Y.; Srinivasan, J.; Joos, Fortunat

2001-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "horsepower change front" 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

Climate change: State of knowledge  

SciTech Connect

Burning coal, oil and natural gas to heat our homes, power our cars, and illuminate our cities produces carbon dioxide (CO2) and other greenhouse gases as by-products. Deforestation and clearing of land for agriculture also release significant quantities of such gases. Records of past climate going as far back as 160,000 years indicate a close correlation between the concentration of greenhouse gases in the atmosphere and global temperatures. Computer simulations of the climate indicate that global temperatures will rise as atmospheric concentrations of CO2 increase. As the risks of global climate change become increasingly apparent, there is a genuine need to focus on actions to reduce our greenhouse gas emissions and minimize the adverse impacts of a changing climate.

1997-12-31T23:59:59.000Z

482

Mainstreaming Climate Change Adaptation into Development Planning...  

Open Energy Info (EERE)

Mainstreaming Climate Change Adaptation into Development Planning: A Guide for Practitioners Jump to: navigation, search Tool Summary Name: Mainstreaming Climate Change Adaptation...

483

Changes in Energy Intensity 1985-1991  

Annual Energy Outlook 2012 (EIA)

Information Administration Home Page. Home > Energy Users > Manufacturing > Changes in Energy Intensity Changes in Energy Intensity 1985-1991 Overview Full Report The focus is...

484

PHASE CHANGE DEVICE - Energy Innovation Portal  

Heating of the phase change material to initiate a change in phase can be provided by the application of ... Building Energy Efficiency; ... Solar Thermal; Startup ...

485

Change Request Forms | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Link - Under Development NMMSS Change of Authorized Contacts Response Form (Last updated: August 14, 2013) NMMSS Change of Project Number Response Form (Last updated: August 14,...

486

Federal Energy Management Program: Institutional Change Basics...  

NLE Websites -- All DOE Office Websites (Extended Search)

Basics for Sustainability Graphic of the eTraining logo Training Available Sustainable Institutional Change for Federal Facility Managers: Learn strategies to change behavior to...

487

diff -crN oommf1.1b1/CHANGES oommf/CHANGES  

Science Conference Proceedings (OSTI)

diff -crN oommf1.1b1/CHANGES oommf/CHANGES. *** oommf1.1b1/ CHANGES Tue Oct 2 12:15:40 2001. --- oommf/CHANGES ...

488

diff -crN oommf-1.0b1/CHANGES oommf/CHANGES  

Science Conference Proceedings (OSTI)

diff -crN oommf-1.0b1/CHANGES oommf/CHANGES. *** oommf-1.0b1/ CHANGES Tue Jul 27 15:49:21 1999. --- oommf/CHANGES ...

489

NIST Guide to SI Units - Appendix B9. Conversion Factors  

Science Conference Proceedings (OSTI)

... horsepower (550 ft · lbf/s), watt (W), 7.456 999, E+02. horsepower (boiler), watt (W), 9.809 50, E+03. horsepower (electric), watt (W), 7.46, E+02. ...

490

NIST Guide to SI Units - Appendix B8. Factors for Units  

Science Conference Proceedings (OSTI)

... horsepower (550 ft · lbf/s) (hp), watt (W), 7.456 999, E+02. horsepower (boiler), watt (W), 9.809 50, E+03. horsepower (electric), watt (W), 7.46, E+02. ...

491

Greenhouse: Planning for climate change  

SciTech Connect

The author reviews the proceedings of a workshop held in Melbourne, Australia in 1987. Participants at the workshop were asked to investigate the impacts of the greenhouse effect on their own particular sector (e.g. energy policy, water resources, coastal engineering, agriculture). Most of the 54 chapters in the proceedings indicate that the climate scenario would not have catastrophic consequences for Australia. However, it could have serious implications for conservation management. In addition, international pressure for reduced use of hydrocarbons could cause severe problems because of the heavy demand for transport fuels. Increased public awareness is needed for developing a response to climate change.

Pearman, G.I.

1989-06-01T23:59:59.000Z

492

Climate Change Issues and Metrology Challenges US ...  

Science Conference Proceedings (OSTI)

... Top of the Atmosphere – Solar Incoming • Standards and Methodologies Advancing Various Measurements ... weather and seasonal changes ...

2013-11-19T23:59:59.000Z

493

An approach for managing web services changes  

Science Conference Proceedings (OSTI)

The dynamic environment where organisations and providers live imposes a gradually evolving of their services to meet new needs, technological changes and requirements of these users. Therefore, the evolution of web services becomes necessary because ... Keywords: adaptation rules, behaviour evolution, change management, change operators, change process, web services

Maamar Khater; Mimoun Malki

2008-06-01T23:59:59.000Z

494

Federal Energy Management Program: Infrastructure Institutional Change  

NLE Websites -- All DOE Office Websites (Extended Search)

Infrastructure Infrastructure Institutional Change Principle to someone by E-mail Share Federal Energy Management Program: Infrastructure Institutional Change Principle on Facebook Tweet about Federal Energy Management Program: Infrastructure Institutional Change Principle on Twitter Bookmark Federal Energy Management Program: Infrastructure Institutional Change Principle on Google Bookmark Federal Energy Management Program: Infrastructure Institutional Change Principle on Delicious Rank Federal Energy Management Program: Infrastructure Institutional Change Principle on Digg Find More places to share Federal Energy Management Program: Infrastructure Institutional Change Principle on AddThis.com... Sustainable Buildings & Campuses Operations & Maintenance Greenhouse Gases

495

Federal Energy Management Program: Commitment Institutional Change  

NLE Websites -- All DOE Office Websites (Extended Search)

Commitment Commitment Institutional Change Principle to someone by E-mail Share Federal Energy Management Program: Commitment Institutional Change Principle on Facebook Tweet about Federal Energy Management Program: Commitment Institutional Change Principle on Twitter Bookmark Federal Energy Management Program: Commitment Institutional Change Principle on Google Bookmark Federal Energy Management Program: Commitment Institutional Change Principle on Delicious Rank Federal Energy Management Program: Commitment Institutional Change Principle on Digg Find More places to share Federal Energy Management Program: Commitment Institutional Change Principle on AddThis.com... Sustainable Buildings & Campuses Operations & Maintenance Greenhouse Gases Water Efficiency Data Center Energy Efficiency

496

Federal Energy Management Program: Leadership Institutional Change  

NLE Websites -- All DOE Office Websites (Extended Search)

Leadership Leadership Institutional Change Principle to someone by E-mail Share Federal Energy Management Program: Leadership Institutional Change Principle on Facebook Tweet about Federal Energy Management Program: Leadership Institutional Change Principle on Twitter Bookmark Federal Energy Management Program: Leadership Institutional Change Principle on Google Bookmark Federal Energy Management Program: Leadership Institutional Change Principle on Delicious Rank Federal Energy Management Program: Leadership Institutional Change Principle on Digg Find More places to share Federal Energy Management Program: Leadership Institutional Change Principle on AddThis.com... Sustainable Buildings & Campuses Operations & Maintenance Greenhouse Gases Water Efficiency Data Center Energy Efficiency

497

Federal Energy Management Program: Determine Institutional Change  

NLE Websites -- All DOE Office Websites (Extended Search)

Determine Determine Institutional Change Sustainability Goals to someone by E-mail Share Federal Energy Management Program: Determine Institutional Change Sustainability Goals on Facebook Tweet about Federal Energy Management Program: Determine Institutional Change Sustainability Goals on Twitter Bookmark Federal Energy Management Program: Determine Institutional Change Sustainability Goals on Google Bookmark Federal Energy Management Program: Determine Institutional Change Sustainability Goals on Delicious Rank Federal Energy Management Program: Determine Institutional Change Sustainability Goals on Digg Find More places to share Federal Energy Management Program: Determine Institutional Change Sustainability Goals on AddThis.com... Sustainable Buildings & Campuses

498

Climate Change Science Institute | Clean Energy | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Climate & Environment Climate & Environment Climate Change Science Institute Earth and Aquatic Sciences Ecosystem Science Environmental Data Science and Systems Energy, Water and Ecosystem Engineering Human Health Risk and Environmental Analysis Renewable Energy Systems Clean Energy Home | Science & Discovery | Clean Energy | Research Areas | Climate & Environment | Climate Change Science Institute SHARE Climate Change Science Institute To advance understanding of the Earth system, describe the consequences of climate change, and evaluate and inform policy on the outcomes of climate change responses. The Climate Change Science Institute is an inter-disciplinary, cross-directorate research organization created in 2009 to advance climate change science research. More than 100 researchers from the Computing and

499

The science of climate change.  

SciTech Connect

A complex debate is underway on climate change linked to proposals for costly measures that would reshape our power grid. This confronts technical experts outside of the geophysical disciplines with extensive, but unfamiliar, data both supporting and refuting claims that serious action is warranted. For example, evidence is brought to the table from one group of astrophysicists concerned with sunspots--this group believes there is no issue man can manage; while another group of oceanographers concerned with the heat balance in the world's oceans are very alarmed at the loss of arctic ice. What is the evidence? In an effort to put some of these issues in perspective for a technical audience, without a background in geophysics, a brief survey will consider (1) an overview of the 300 years of scientific inquiry on man's relationship to climate; (2) a basic discussion of what is meant by the ''greenhouse'' and why there are concerns which include not only CO{sub 2}, but also CH{sub 4}, N{sub 2}O, and CFC's; (3) the geological record on CO{sub 2}--which likely was present at 1,000 times current levels when life began; (4) the solar luminosity and sunspot question; and (5) the current evidence for global climate change. We are at a juncture where we are attempting to understand the earth as an integrated dynamic system, rather than a collection of isolated components.

Doctor, R. D.

1999-09-10T23:59:59.000Z

500

Nothing is Constant But Change  

E-Print Network (OSTI)

There is an old adage - nothing is constant but change. This sage observation is especially true in looking at today's energy picture. The energy crisis is dead. Energy problems are no longer the moral equivalent of war. Personally, I never did fully subscribe to the use of the word crises, I preferred transition instead. However, to people waiting in a gasoline line, I'm sure crises was a suitable description. Today there appears to be plenty of oil and its price has stabilized. We can expect these favorable conditions to continue into the near future barring any sudden and substantial change in international politics. Natural gas is plentiful though its price continues to climb. Also there are many very knowledgeable people in the gas business who believe decontrol will lead to even more ample supplies and possible lower prices. Coal and electricity are best described as being in over abundance. Witness the number of coal mines shut-in and the number of new nuclear power plants recently cancelled or postponed. Complacency in regard to energy problems is setting in.

Kelly, R. L.

1984-01-01T23:59:59.000Z