National Library of Energy BETA

Sample records for horsepower change front

  1. Relating horsepower to drilling productivity

    SciTech Connect (OSTI)

    Givens, R.; Williams, G.; Wingfield, B.

    1996-12-31

    Many technological advancements have been made in explosive products and applications over the last 15 years resulting in productivity and cost gains. However, the application of total energy (engine horsepower) in the majority of rotary drilling technology, has remained virtually unchanged over that period. While advancements have been made in components, efficiency, and types of hydraulic systems used on drills, the application of current hydraulic technology to improve drilling productivity has not been interactive with end users. This paper will investigate how traditional design assumptions, regarding typical application of horsepower in current rotary drill systems, can actually limit productivity. It will be demonstrated by numeric analysis how changing the partitioning of available hydraulic energy can optimize rotary drill productivity in certain conditions. Through cooperative design ventures with drill manufacturers, increased penetration rates ranging from 20% to 100% have been achieved. Productivity was increased initially on some rigs by careful selection of optional hydraulic equipment. Additional gains were made in drilling rates by designing the rotary hydraulic circuit to meet the drilling energies predicted by computer modeling.

  2. Economic Realities and Energy Efficient Polyphase Integral Horsepower Electric Motors

    E-Print Network [OSTI]

    Whittington, B. W.

    1980-01-01

    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...

  3. Front Burner- Issue 14

    Broader source: Energy.gov [DOE]

    The Cybersecurity Front Burner Issue No. 14 addresses the 2013 National Cybersecurity Awareness Month (NCSAM) Campaign and Phishing Scams.

  4. Front Burner- Issue 15

    Broader source: Energy.gov [DOE]

    The Cybersecurity Front Burner Issue No. 15 addresses the DOE eSCRM Program and Secure Online Shopping.

  5. Front Burner- Issue 18

    Broader source: Energy.gov [DOE]

    The Cybersecurity Front Burner Issue No. 18 addresses keeping kids safe on the Internet, cyber crime, and DOE Cyber awareness and training initiatives.

  6. Front Burner- Issue 13

    Broader source: Energy.gov [DOE]

    The Cybersecurity Front Burner Issue No. 13 contained a message from the Associate Chief Information Officer (ACIO) for Cybersecurity as well as a listing of recommended cybersecurity practices.

  7. Frontal circulation induced by up-front and coastal downwelling winds

    E-Print Network [OSTI]

    consequences to vertical exchanges of tracers and water masses. Keywords Ocean fronts . Wind-front interactionFrontal circulation induced by up-front and coastal downwelling winds Yu-Lin Chang & Lie-Yauw Oey-shelf and depth) circula- tion by downwelling wind in the presence of a prograding front (with isopycnals

  8. Energy deposition update Front End phone meeting

    E-Print Network [OSTI]

    McDonald, Kirk

    Energy deposition update P. Snopok Front End phone meeting March 31, 2015 #12;MARS · Modified geometry is strongly desired · Energy change is via RF kick at the center of the cavity ­ MARS invokes in ICOOL/G4beamline · How thick the beampipe and shielding around (if any) should be ­ energy deposition

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

    SciTech Connect (OSTI)

    Not Available,

    1980-09-15

    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.

  10. ARM - Front Page

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Comments? WeDatastreamstps DocumentationAtlanticENAField Participants Campaign Details News FieldgovFront Page

  11. Acceleration at shock fronts. Lecture 2 D. B. MELROSE

    E-Print Network [OSTI]

    Melrose, Don

    Fiiica #12;upstream downstream shock Fig. 1.- The changes in fluid velocity and magnetic field across. The upstream magnetic field is at an angle to n,and this changes to $2 in the downstream region. equal front is at rest, with the upstream plasma flowing into it at a velocity ul and the downstream plasma

  12. Front-lighted shadowgraphic method and apparatus

    SciTech Connect (OSTI)

    Not Available

    1982-02-11

    High contrast silhouette images of a substantially opaque object are obtained using front illumination techniques. The object is frontally illuminated by light of a first polarization. A frontal surface of the object reflects the incident light to an observation station. The polarization of incident light bypassing the object and incident on a background is changed. The background light is reflected to the observation station, and the intensity of one of the two, differently polarized, reflected images is substantially reduced with respect to the other. Apparatus for carrying out the method includes a first polarizer for polarizing frontally incident illuminating light, a second polarizer behind the object and a reflective surface behind the second polarizer. A polarization analyzer, located in front of the object, is used to extinguish one of the two reflected images. Apparatus for carrying out the invention in instruments having a polarized light source and a polarization analyzer includes a combination of a polarizing material, for contacting a rear surface of the object, and a reflective surface provided adjacent the rear surface of the polarizing material. The combination is applied to the rear surface of the object. Back-surface mirrors of pleochroic substrates, applied to thin film physical vapor-deposited electronic circuit elements, enable front lighted shadow-graphic imaging of the elements.

  13. Ocean fronts trigger high latitude phytoplankton blooms

    E-Print Network [OSTI]

    Taylor, John R.

    Density fronts are ubiquitous features of the upper ocean. Here, numerical simulations show that restratification at fronts inhibits vertical mixing, triggering phytoplankton blooms in low-light conditions. The stability ...

  14. Operations & Maintenance Best Practices Guide: Front Matter

    Broader source: Energy.gov [DOE]

    Guide describes the front matter of the Operations and Maintenance Best Practices: a Guide to Achieving Operational Efficiency.

  15. The Front End Fermi National Accelerator Lab

    E-Print Network [OSTI]

    McDonald, Kirk

    The Front End MAP Review Fermi National Accelerator Lab August 24-26, 2010 Harold G. Kirk Brookhaven National Laboratory #12;August 2426, 2010 MAP ReviewFront End Harold G. Kirk ReviewFront End Harold G. Kirk 3 The Muon Collider/Neutrino Factory

  16. On the propagation of a coupled saturation and pressure front

    SciTech Connect (OSTI)

    Vasco, D. W.

    2010-12-01

    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.

  17. FrontYard *** UpstairsLand

    E-Print Network [OSTI]

    Rosenthal, Jeffrey S.

    Kitchen log[2] Dining Vegetable Embankment RiverShall OutsidePen InsidePen button FrontBarn Windmill [3

  18. Helices in the wake of precipitation fronts

    E-Print Network [OSTI]

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

    2013-08-30

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

  19. Front End G4beamline simulation update Front End G4beamline simulation update

    E-Print Network [OSTI]

    McDonald, Kirk

    1 Front End G4beamline simulation update Front End G4beamline simulation update Pavel Snopok University of California Riverside September 14, 2010 #12;2 Front End G4beamline simulation update More yields per incident proton. Energy deposition study in G4beamline is underway. All numerical results

  20. Light front distribution of the chiral condensate

    E-Print Network [OSTI]

    Lei Chang; Craig D. Roberts; Sebastian M. Schmidt

    2013-09-19

    The pseudoscalar projection of the pion's Poincare'-covariant Bethe-Salpeter amplitude onto the light-front may be understood to provide the probability distribution of the chiral condensate within the pion. Unlike the parton distribution amplitudes usually considered and as befitting a collective effect, this condensate distribution receives contributions from all Fock space components of the pion's light-front wave-function. We compute this condensate distribution using the Dyson-Schwinger equation (DSE) framework and show the result to be a model-independent feature of quantum chromodynamics (QCD). Our analysis establishes that this condensate is concentrated in the neighbourhood of the boundaries of the distribution's domain of support. It thereby confirms the dominant role played by many-particle Fock states within the pion's light-front wave function in generating the chiral condensate on the light-front and verifies that light-front longitudinal zero modes do not play a material role in that process.

  1. Back Cover Front Cover Office of Continuing

    E-Print Network [OSTI]

    Goodman, Robert M.

    Back Cover Front Cover Office of Continuing Professional Education 20122013 Professional Landscape of Golf Course Irrigation Systems (p. 13) Basics of Turf Management (p. 21) Turfgrass Establishment (p

  2. Light front Casimir effect at finite temperature

    E-Print Network [OSTI]

    P. L. M. Rodrigues; Silvana Perez; Danilo T. Alves; Van Srgio Alves; Charles R. Silva

    2015-01-06

    The correct description of the standard Casimir effect for periodic boundary conditions via light front formalism implies in these conditions imposed at fixed Minkowski times [Almeida {\\it et al.} Phys. Rev. {\\bf D 87}, 065028 (2013); Chabysheva and Hiller, Phys. Rev. {\\bf D 88}, 085006 (2013)] instead of fixed light front times. The unphysical nature of this latter condition is manifested in the vacuum part by no regularization yielding a finite Casimir energy density [Lenz and Steinbacher, Phys. Rev. {\\bf D 67}, 045010 (2003)]. In the present paper, we extend this discussion and analyze the problem of the light front quantization with simultaneous presence of a thermal bath and boundary conditions. Considering both the oblique light front as well as Dirac light front coordinates, we show that the imposition of periodic boundary conditions at fixed Minkowski times recovers the expected behaviors for the energy density and Casimir entropy. We also investigate how the unphysical nature of the periodic boundary conditions imposed at fixed light front times manifests in the thermal part of the energy and entropy, showing that in the classical limit the Casimir entropy decreases linearly with the temperature (not becoming independent of the temperature as expected), and also that the Kirchhoff theorem is not respected.

  3. 3000 Horsepower super conductive field acyclic motor

    SciTech Connect (OSTI)

    Marshall, R.

    1983-05-01

    A 3000 hp acyclic motor was assembled and tested utilizing superconducting field coils. The magnet assembly is designed as a quadrupole magnet, utilizing a multifilamentary niobium titanium superconductor. Each magnet coil is 18 inches in diameter and 10 inches long, and operates at rated current of 200 amperes, providing 5.8 tesla in the bore of the coils in the motor configuration. The average winding current density is 10,600 A/cm/sup 2/. The acyclic motor is of a drum-type design with liquid metal current collectors, and is designed to model full-scale machinery for ship propulsion applications. Laboratory test data verified the electrical and electromagnetic design to be within three percent of the calculated values.

  4. Developments on the CENS Structural Health Monitoring Front

    E-Print Network [OSTI]

    2009-01-01

    on the CENS Structural Health Monitoring Front D. Skolnik,Introduction: Structural Health Monitoring (SHM) Systems

  5. Developments on the CENS Structural Health Monitoring Front

    E-Print Network [OSTI]

    2007-01-01

    on the CENS Structural Health Monitoring Front D. Skolnik,Introduction: Structural Health Monitoring (SHM) Systems

  6. QCD and Light-Front Dynamics

    SciTech Connect (OSTI)

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

    2011-01-10

    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.

  7. ibm.com/redbooks Front cover

    E-Print Network [OSTI]

    Westall, James M.

    ibm.com/redbooks Front cover IBM XIV Storage System: Architecture, Implementation, and Usage Organization IBM XIV Storage System: Architecture, Implementation, and Usage September 2009 SG24-7659-01 #12 with IBM Corp. Second Edition (September 2009) This edition applies to Version 10, Release 1, of the XIV

  8. ibm.com/redbooks Front cover

    E-Print Network [OSTI]

    Hickman, Mark

    ibm.com/redbooks Front cover IBM System Blue Gene Solution: Application Development Gary L. Mullen Organization IBM System Blue Gene Solution: Application Development June 2007 SG24-7179-04 #12;© Copyright Restricted Rights -- Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp

  9. On the fate of the Antarctic Slope Front and the origin of the Weddell Front

    E-Print Network [OSTI]

    Naveira Garabato, Alberto

    Oceanography: Physical: Fronts and jets; 4532 Oceanography: Physical: General circulation; 4536 Oceanography: Physical: Hydrography; 4207 Oceanography: General: Arctic and Antarctic oceanography; 4223 Oceanography: General: Descriptive and regional oceanography; KEYWORDS: topographic interaction, Weddell Scotia

  10. Front-end electronics and trigger systems - status and challenges

    E-Print Network [OSTI]

    Spieler, Helmuth G

    2008-01-01

    of the 12th Workshop on Electronics For LHC and Future19-24, 2007 Front-end electronics and trigger systems about a revolution in front-end electronics for large- scale

  11. Developments on the CENS Structural Health Monitoring Front (SEI 2)

    E-Print Network [OSTI]

    2006-01-01

    on the CENS Structural Health Monitoring Front M. Kohler, J.framework for structural health monitoring (SHM). hea lth

  12. Tracking the Salt Front Page 1 Name __________________________________________ Date____________________

    E-Print Network [OSTI]

    Lance, Veronica P.

    , moving the salt front inland. Scientists track the salt front using Hudson River Miles, abbreviated HRM, is HRM 0. The George Washington Bridge is at HRM 12, the city of Kingston at HRM 91. Ocean tides reach the Federal Dam in Troy at HRM 153. Using the graph "Hudson River Salt Front: Average Location by Month

  13. Light-front chiral effective field theory

    SciTech Connect (OSTI)

    Mathiot, J.-F. [Laboratoire de Physique Corpusculaire (France)] [Laboratoire de Physique Corpusculaire (France); Tsirova, N. A., E-mail: ntsirova@ssu.samara.ru [Samara State University (Russian Federation)

    2013-11-15

    We propose a general framework to calculate the nonperturbative structure of relativistic bound state systems. The state vector of the bound state is calculated in the covariant formulation of light-front dynamics. In this scheme, the state vector is defined on the light front of general position {omega} {center_dot} x = 0, where {omega} is an arbitrary light-like four-vector. This enables a strict control of any violation of rotational invariance. The state vector is then decomposed in Fock components. Our formalism is applied to the description of the nucleon properties at low energy, in chiral perturbation theory. We also show that the use of a recently proposed regularization scheme, the so-called Taylor-Lagrange regularization scheme, is very adequate in order to treat divergences in this nonperturbative framework.

  14. Front contact solar cell with formed emitter

    SciTech Connect (OSTI)

    Cousins, Peter John

    2014-11-04

    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.

  15. Front contact solar cell with formed emitter

    DOE Patents [OSTI]

    Cousins, Peter John (Menlo Park, CA)

    2012-07-17

    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.

  16. Pentan isomers compound flame front structure

    SciTech Connect (OSTI)

    Mansurov, Z.A.; Mironenko, A.W.; Bodikov, D.U.; Rachmetkaliev, K.N.

    1995-08-13

    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.

  17. Bay Front Biomass Facility | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop IncIowaWisconsin: EnergyYorkColorado StateWind ProjectVillage,BatonFront Biomass

  18. FRONT BURNER - ISSUE 19 | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum12, 2015Executive Order14, 2011 CX-006821:forEnergyADVANCEDTO: Ex parteFRONT

  19. Fronts and fluctuations at a critical surface

    E-Print Network [OSTI]

    Haim Weissmann; Nadav M. Shnerb; David A. Kessler

    2015-08-14

    The properties of a front between two different phases in the presence of a smoothly inhomogeneous external field that takes its critical value at the crossing point is analyzed. Two generic scenarios are studied. In the first, the system admits a bistable solution and the external field governs the rate in which one phase invades the other. The second mechanism corresponds to a second order transition that, in the case of reactive systems, takes the form of a transcritical bifurcation at the crossing point. We solve for the front shape and its response to external white noise, showing that static properties and also some of the dynamics features cannot distinguish between the two scenarios. The only reliable indicator turns out to be the fluctuation statistics. These take a Gaussian form in the bifurcation case and a double-peak shape in a bistable system. The results of a recent analysis of the morphogenesis process in Drosophila embryos are reanalyzed and we show, in contrast with the interpretation suggested by Krotov et. al., that the plausible underlying dynamics is bistable and not bifurcational.

  20. Front-runners in plant-microbe interactions.

    E-Print Network [OSTI]

    Ronald, Pamela C; Shirasu, Ken

    2012-01-01

    Front-runners in plantmicrobe interactions Editorialwww.sciencedirect.com Plants and microbes, abundant in thedetermine if the associated microbes are friends or foes,

  1. Light-front representation of chiral dynamics in peripheral transverse...

    Office of Scientific and Technical Information (OSTI)

    for the peripheral transverse densities as overlap integrals of chiral light-front wave functions, describing the transition of the initial nucleon to soft pion-nucleon...

  2. Light-Front Holography, Light-Front Wavefunctions, and Novel QCD Phenomena

    SciTech Connect (OSTI)

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

    2012-02-16

    Light-Front Holography is one of the most remarkable features of the AdS/CFT correspondence. In spite of its present limitations it provides important physical insights into the nonperturbative regime of QCD and its transition to the perturbative domain. This novel framework allows hadronic amplitudes in a higher dimensional anti-de Sitter (AdS) space to be mapped to frame-independent light-front wavefunctions of hadrons in physical space-time. The model leads to an effective confining light-front QCD Hamiltonian and 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, and thus the fall-off as a function of the invariant mass of the constituents. The soft-wall holographic model modified by a positive-sign dilaton metric, leads to a remarkable one-parameter description of nonperturbative hadron dynamics - a semi-classical frame-independent first approximation to the spectra and light-front wavefunctions of meson and baryons. The model predicts a Regge spectrum of linear trajectories with the same slope in the leading orbital angular momentum L of hadrons and the radial quantum number n. The hadron eigensolutions projected on the free Fock basis provides the complete set of valence and non-valence light-front Fock state wavefunctions {Psi}{sub n/H} (x{sub i}, k{sub {perpendicular}i}, {lambda}{sub i}) which describe the hadron's momentum and spin distributions needed to compute the direct measures of hadron structure at the quark and gluon level, such as elastic and transition form factors, distribution amplitudes, structure functions, generalized parton distributions and transverse momentum distributions. The effective confining potential also creates quark-antiquark pairs from the amplitude q {yields} q{bar q}q. Thus in holographic QCD higher Fock states can have any number of extra q{bar q} pairs. We discuss the relevance of higher Fock-states for describing the detailed structure of space and time-like form factors. 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 in order to systematically include the QCD interaction terms. A new perspective on quark and gluon condensates is also obtained.

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

    DOE Patents [OSTI]

    Cousins, Peter John

    2012-06-26

    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.

  4. 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

  5. Combustion fronts in porous media with two layers Steve Schecter

    E-Print Network [OSTI]

    Schecter, Stephen

    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

  6. Mean stream coordinates structure of the Subantarctic Front: Temperature, salinity,

    E-Print Network [OSTI]

    Luther, Douglas S.

    . The cross-stream structure of along-stream velocity is very nearly symmetric about the jet axisMean stream coordinates structure of the Subantarctic Front: Temperature, salinity, and absolute southwest of Tasmania, at the Subantarctic Front (SAF), is estimated by a stream coordinates analysis

  7. Front velocity in models with quadratic autocatalysis Vladimir K. Vanaga)

    E-Print Network [OSTI]

    Epstein, Irving R.

    Front velocity in models with quadratic autocatalysis Vladimir K. Vanaga) and Irving R. Epstein reactiondiffusion models based on the Oregonator model of the BelousovZhabotinsky reaction. Each system the dependence of the front velocity on the diffusion coefficients of X and R, the interconversion rates

  8. NUMERICAL SOLUTION OF THE POLYMER SYSTEM BY FRONT TRACKING

    E-Print Network [OSTI]

    , models twophase, threecomponent polymer flooding in an oil reservoir. Two examples are presented, where. Key words and phrases. Front tracking, nonstrictly hyperbolic systems, polymer flooding, dimensionalNUMERICAL SOLUTION OF THE POLYMER SYSTEM BY FRONT TRACKING V. HAUGSE, K. H. KARLSEN, K.--A. LIE

  9. Electron g-2 in Light-front Quantization

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

    Zhao, Xingbo; Honkanen, Heli; Maris, Pieter; Vary, James P.; Brodsky, Stanley J.

    2014-10-01

    Basis Light-front Quantization has been proposed as a nonperturbative framework for solving quantum field theory. We apply this approach to Quantum Electrodynamics and explicitly solve for the light-front wave function of a physical electron. Based on the resulting light-front wave function, we evaluate the electron anomalous magnetic moment. Nonperturbative mass renormalization is performed. Upon extrapolation to the infinite basis limit our numerical results agree with the Schwinger result obtained in perturbation theory to an accuracy of 0.06%.

  10. LARGE-SCALE CORONAL PROPAGATING FRONTS IN SOLAR ERUPTIONS AS...

    Office of Scientific and Technical Information (OSTI)

    LARGE-SCALE CORONAL PROPAGATING FRONTS IN SOLAR ERUPTIONS AS OBSERVED BY THE ATMOSPHERIC IMAGING ASSEMBLY ON BOARD THE SOLAR DYNAMICS OBSERVATORY-AN ENSEMBLE STUDY Re-direct...

  11. RF CMOS UWB transmitter and receiver front-end design

    E-Print Network [OSTI]

    Miao, Meng

    2009-05-15

    The low-cost low-power complementary metal-oxide semiconductor (CMOS) ultra wideband (UWB) transmitter and receiver front-ends based on impulse technology were developed. The CMOS UWB pulse generator with frequency-band ...

  12. The Active Wave-front Sampling based 3D endoscope

    E-Print Network [OSTI]

    Prakash, Hemanth

    2007-01-01

    This thesis investigates the potential of Active Wave-front Sampling (AWS) for real time quantified 3D endoscopy. AWS is a technique by which phase information from an aperture area of a lens is obtained by sampling ...

  13. Global optimization of silicon photovoltaic cell front coatings

    E-Print Network [OSTI]

    Ghebrebrhan, Michael

    The front-coating (FC) of a solar cell controls its efficiency, determining admission of light into the absorbing material and potentially trapping light to enhance thin absorbers. Single-layer FC designs are well known, ...

  14. Home Front as Warfront: African American World War I Drama

    E-Print Network [OSTI]

    Egging, Anna Katherine

    2010-08-31

    This dissertation recovers little-known African American World War I plays that blur the boundary between the home front and warfront. I argue that with this focus, the plays wage their own war for African American citizenship ...

  15. Speed-up of combustion fronts in shear flows

    E-Print Network [OSTI]

    Hamel, Francois

    2011-01-01

    This paper is concerned with the analysis of speed-up of reaction-diffusion-advection traveling fronts in infinite cylinders with periodic boundary conditions. The advection is a shear flow with a large amplitude and the reaction is nonnegative, with either positive or zero ignition temperature. The unique or minimal speeds of the traveling fronts are proved to be asymptotically linear in the flow amplitude as the latter goes to infinity, solving an open problem from \\cite{b}. The asymptotic growth rate is characterized explicitly as the unique or minimal speed of traveling fronts for a limiting degenerate problem, and the convergence of the regular traveling fronts to the degenerate ones is proved for positive ignition temperatures under an additional H{\\"{o}}rmander-type condition on the flow.

  16. Phase front patterns in shape memory alloy strips

    SciTech Connect (OSTI)

    Lagoudas, D.C.; Howard, S.D. [Texas A& M Univ., TX (United States)

    1995-12-31

    Uniaxial thermomechanical tests of Shape Memory Alloy (SMA) Nitinol strips, below the austenitic start temperature, have shown the formation of multiple phase front patterns forming at approximately 45 degrees angle with respect to the applied load. These phase fronts, that separate self-accommodating martensitic variants from detwinned martensite, propagate along the specimen in the direction of applied load, until fully detwinned martensite is developed. Similar patterns of martensitic-austenitic phase fronts occur when the temperature is raised above austenitic finish, and uniaxial loading is applied to the strip specimens. An experimental study of this phenomenon, together with some preliminary modelling results will be presented. In contrast to the above uniform loading case, experimental results and numerical simulations for the propagation of a phase transformation front, induced by an imposed temperature gradient, will also be presented.

  17. Carbon Emissions from Smouldering Peat in Shallow and Strong Fronts

    E-Print Network [OSTI]

    Rein, Guillermo; Cohen, Simon; Simeoni, Albert

    2009-01-01

    A series of experiments of shallow and strong smouldering fronts in boreal peat have been conducted under laboratory conditions to study the CO and CO2 emissions. Peat samples of 100 mm by 100 mm in cross section and 50 ...

  18. Meson structure in light-front holographic QCD

    E-Print Network [OSTI]

    Rohit Swarnkar; Dipankar Chakrabarti

    2015-07-06

    We consider the light-front holographic QCD with the light-front wave functions for mesons, modified for massive quarks. We evaluate the wave functions, distribution amplitudes, and form factors for $\\pi$, $\\rho$, $K$, and $J/\\psi$ mesons and photon-to-meson transition form factors for $\\pi$, $\\eta$, and $\\eta^\\prime$. The results are compared with the experimental data, wherever available.

  19. Low voltage supply system for the very front end readout electronics of the CMS electromagnetic calorimeter

    E-Print Network [OSTI]

    Lustermann, W; Denes, P; Djambazov, L; Drge, M; Faure, J L; Iliev, Bozhidar Z; Nanov, I; Raykov, P; Shivarov, N

    1999-01-01

    Low voltage supply system for the very front end readout electronics of the CMS electromagnetic calorimeter

  20. INSTABILITY OF MAGNETIZED IONIZATION FRONTS SURROUNDING H II REGIONS

    SciTech Connect (OSTI)

    Kim, Jeong-Gyu; Kim, Woong-Tae, E-mail: jgkim@astro.snu.ac.kr, E-mail: wkim@astro.snu.ac.kr [Center for the Exploration of the Origin of the Universe (CEOU), Astronomy Program, Department of Physics and Astronomy, Seoul National University, Seoul 151-742 (Korea, Republic of)

    2014-12-20

    An ionization front (IF) surrounding an H II region is a sharp interface where a cold neutral gas makes the transition to a warm ionized phase by absorbing UV photons from central stars. We investigate the instability of a plane-parallel D-type IF threaded by parallel magnetic fields, by neglecting the effects of recombination within the ionized gas. We find that weak D-type IFs always have the post-IF magnetosonic Mach number M{sub M2}?1. For such fronts, magnetic fields increase the maximum propagation speed of the IFs, while reducing the expansion factor ? by a factor of 1 + 1/(2?{sub 1}) compared to the unmagnetized case, with ?{sub 1} denoting the plasma beta in the pre-IF region. IFs become unstable to distortional perturbations owing to gas expansion across the fronts, exactly analogous to the Darrieus-Landau instability of ablation fronts in terrestrial flames. The growth rate of the IF instability is proportional linearly to the perturbation wavenumber, as well as the upstream flow speed, and approximately to ?{sup 1/2}. The IF instability is stabilized by gas compressibility and becomes completely quenched when the front is D-critical. The instability is also stabilized by magnetic pressure when the perturbations propagate in the direction perpendicular to the fields. When the perturbations propagate in the direction parallel to the fields, on the other hand, it is magnetic tension that reduces the growth rate, completely suppressing the instability when M{sub M2}{sup 2}<2/(2?{sub 1}?1). When the front experiences an acceleration, the IF instability cooperates with the Rayleigh-Taylor instability to make the front more unstable.

  1. Scaling of Quench Front and Entrainment-Related Phenomena

    SciTech Connect (OSTI)

    Aumiller, D. L.; Hourser, R. J.; Holowach, M. J.; Hochreiter, L. E.; Cheung, F-B.

    2002-04-01

    The scaling of thermal hydraulic systems is of great importance in the development of experiments in laboratory-scale test facilities that are used to replicate the response of full-size prototypical designs. One particular phenomenon that is of interest in experimental modeling is the quench front that develops during the reflood phase in a PWR (Pressurized Water Reactor) following a large-break LOCA (Loss of Coolant Accident). The purpose of this study is to develop a scaling methodology such that the prototypical quench front related phenomena can be preserved in a laboratory-scale test facility which may have material, geometrical, fluid, and flow differences as compared to the prototypical case. A mass and energy balance on a Lagrangian quench front control volume along with temporal scaling methods are utilized in developing the quench front scaling groups for a phenomena-specific second-tier scaling analysis. A sample calculation is presented comparing the quench front scaling groups calculated for a prototypical Westinghouse 17 x 17 PWR fuel design and that of the geometry and material configuration used in the FLECHT SEASET series of experiments.

  2. Methods for enhancing mapping of thermal fronts in oil recovery

    DOE Patents [OSTI]

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

    1984-03-30

    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.

  3. Methods for enhancing mapping of thermal fronts in oil recovery

    DOE Patents [OSTI]

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

    1987-01-01

    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.

  4. Acoustic wave front conjugation in a three-phase media

    E-Print Network [OSTI]

    Pushkina, N I

    2015-01-01

    Acoustic wave front reversal is studied in a sandy marine sediment that contains air bubbles in its fluid fraction. The considered phase conjugation is a four-wave nonlinear parametric sound interaction process caused by nonlinear bubble oscillations which are known to be dominant in acoustic nonlinear interactions in three-phase marine sediments. Two various mechanisms of phase conjugation are studied. One of them is based on the stimulated Raman-type sound scattering on resonance bubble oscillations. The second one is associated with sound interactions with bubble oscillations which frequencies are far from resonance bubble frequencies. Nonlinear equations to solve the wave-front conjugation problem are derived, expressions for acoustic wave amplitudes with a reversed wave front are obtained and compared for various frequencies of the excited bubble oscillations.

  5. Acoustic wave front reversal in a three-phase media

    E-Print Network [OSTI]

    N. I. Pushkina

    2015-03-05

    Acoustic wave front conjugation is studied in a sandy marine sediment that contains air bubbles in its fluid fraction. The considered phase conjugation is a four-wave nonlinear parametric sound interaction process caused by nonlinear bubble oscillations which are known to be dominant in acoustic nonlinear interactions in three-phase marine sediments. Two various mechanisms of phase conjugation are studied. One of them is based on the stimulated Raman-type sound scattering on resonance bubble oscillations. The second one is associated with sound interactions with bubble oscillations which frequencies are far from resonance bubble frequencies. Nonlinear equations to solve the wave-front conjugation problem are derived, expressions for acoustic wave amplitudes with a reversed wave front are obtained and compared for various frequencies of the excited bubble oscillations.

  6. Light-Front Holographic QCD and Emerging Confinement

    E-Print Network [OSTI]

    Stanley J. Brodsky; Guy F. de Teramond; Hans Gunter Dosch; Joshua Erlich

    2015-02-13

    In this report we explore the remarkable connections between light-front dynamics, its holographic mapping to gravity in a higher-dimensional anti-de Sitter (AdS) space, and conformal quantum mechanics. This approach provides new insights into the origin of a fundamental mass scale and the physics underlying confinement dynamics in QCD in the limit of massless quarks. The result is a relativistic light-front wave equation for arbitrary spin with an effective confinement potential derived from a conformal action and its embedding in AdS space. This equation allows for the computation of essential features of hadron spectra in terms of a single scale. The light-front holographic methods described here gives a precise interpretation of holographic variables and quantities in AdS in terms of light-front variables and quantum numbers. This leads to a relation between the AdS wave functions and the boost-invariant light-front wave functions describing the internal structure of hadronic bound states in physical space-time. The pion is massless in the chiral limit and the excitation spectra of relativistic light-quark meson and baryon bound states lie on linear Regge trajectories with identical slopes in the radial and orbital quantum numbers. In the light-front holographic approach described here currents are expressed as an infinite sum of poles, and form factors as a product of poles. At large $q^2$ the form factor incorporates the correct power-law fall-off for hard scattering independent of the specific dynamics and is dictated by the twist. At low $q^2$ the form factor leads to vector dominance. The approach is also extended to include small quark masses. We briefly review in this report other holographic approaches to QCD, in particular top-down and bottom-up models based on chiral symmetry breaking. We also include a discussion of open problems and future applications.

  7. Light-front holographic QCD and emerging confinement

    SciTech Connect (OSTI)

    Brodsky, Stanley J.; de Tramond, Guy F.; Dosch, Hans Gnter; Erlich, Joshua

    2015-05-21

    In this study we explore the remarkable connections between light-front dynamics, its holographic mapping to gravity in a higher-dimensional anti-de Sitter (AdS) space, and conformal quantum mechanics. This approach provides new insights into the origin of a fundamental mass scale and the physics underlying confinement dynamics in QCD in the limit of massless quarks. The result is a relativistic light-front wave equation for arbitrary spin with an effective confinement potential derived from a conformal action and its embedding in AdS space. This equation allows for the computation of essential features of hadron spectra in terms of a single scale. The light-front holographic methods described here give a precise interpretation of holographic variables and quantities in AdS space in terms of light-front variables and quantum numbers. This leads to a relation between the AdS wave functions and the boost-invariant light-front wave functions describing the internal structure of hadronic bound-states in physical spacetime. The pion is massless in the chiral limit and the excitation spectra of relativistic light-quark meson and baryon bound states lie on linear Regge trajectories with identical slopes in the radial and orbital quantum numbers. In the light-front holographic approach described here currents are expressed as an infinite sum of poles, and form factors as a product of poles. At large q2 the form factor incorporates the correct power-law fall-off for hard scattering independent of the specific dynamics and is dictated by the twist. At low q2 the form factor leads to vector dominance. The approach is also extended to include small quark masses. We briefly review in this report other holographic approaches to QCD, in particular top-down and bottom-up models based on chiral symmetry breaking. We also include a discussion of open problems and future applications.

  8. Light-front holographic QCD and emerging confinement

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

    Brodsky, Stanley J.; de Tramond, Guy F.; Dosch, Hans Gnter; Erlich, Joshua

    2015-05-21

    In this study we explore the remarkable connections between light-front dynamics, its holographic mapping to gravity in a higher-dimensional anti-de Sitter (AdS) space, and conformal quantum mechanics. This approach provides new insights into the origin of a fundamental mass scale and the physics underlying confinement dynamics in QCD in the limit of massless quarks. The result is a relativistic light-front wave equation for arbitrary spin with an effective confinement potential derived from a conformal action and its embedding in AdS space. This equation allows for the computation of essential features of hadron spectra in terms of a single scale. Themorelight-front holographic methods described here give a precise interpretation of holographic variables and quantities in AdS space in terms of light-front variables and quantum numbers. This leads to a relation between the AdS wave functions and the boost-invariant light-front wave functions describing the internal structure of hadronic bound-states in physical spacetime. The pion is massless in the chiral limit and the excitation spectra of relativistic light-quark meson and baryon bound states lie on linear Regge trajectories with identical slopes in the radial and orbital quantum numbers. In the light-front holographic approach described here currents are expressed as an infinite sum of poles, and form factors as a product of poles. At large q2 the form factor incorporates the correct power-law fall-off for hard scattering independent of the specific dynamics and is dictated by the twist. At low q2 the form factor leads to vector dominance. The approach is also extended to include small quark masses. We briefly review in this report other holographic approaches to QCD, in particular top-down and bottom-up models based on chiral symmetry breaking. We also include a discussion of open problems and future applications.less

  9. Adjustable-Speed Drives for 500 to 4000 Horsepower Industrial...

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

    thereby controlling the amount of torque transmitted. Eliminates the transmission of vibration across the drive due to the air gap configuration. Benefits Productivity Eliminates...

  10. Calculating Horsepower Requirements and Sizing Supply Pipelines for Irrigation

    E-Print Network [OSTI]

    Fipps, Guy

    1995-09-05

    between 2 and 3 ft/s in order to prevent cavitation. Table 5 lists the maximum flow rates recommended for different ID (internal diameter) pipe sizes using the 5 ft/s rule. Many friction loss tables give both the friction loss and velocity for any given...

  11. Alternative Fuels Data Center: Hybrid Electric Horsepower for Kentucky

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data Center Home PageBlender Pump Dispensers toStationNaturalSchools Hybrid

  12. Development of RF CMOS receiver front-ends for ultrawideband

    E-Print Network [OSTI]

    Guan, Xin

    2009-05-15

    .5dB and a noise figure of 3.3-4.5dB from 3-9.5GHz, while only consuming 9mW power. Based on the distributed amplifier and resistive shunt-feedback amplifier designs, two UWB RF front-ends are developed. One is a distributed LNA-Mixer. Unlike...

  13. Propagating front in an excited granular layer W. Losert,1

    E-Print Network [OSTI]

    Gollub, Jerry P.

    that produces a rapid transition. We measure the front velocity as a function of the applied acceleration and the mechanisms of transitions between phases are of great interest. Although there are no attractive a triggered phase transition that transforms a quiescent disordered phase to an excited granu- lar gas via

  14. ON THE FRONT COVER Kristen Barnes | Fifth year

    E-Print Network [OSTI]

    Acton, Scott

    Moul | Third year Sheridan Fuller | Third year Harry Whelchel | Fourth year ON THE BACK COVER Lukef a c t b o ok2012 #12;ON THE FRONT COVER Kristen Barnes | Fifth year Darren Daniels | First year William R. Richardson | Third year Alyson Richardson | Third year Chris Bergin | First year Shakye Jones

  15. Flame front tracking by laser induced fluorescence spectroscopy and advanced

    E-Print Network [OSTI]

    Hamarneh, Ghassan

    surface characteristics in turbulent premixed propane/air combustion," Combustion and Flame 120(4), 407 References and links 1. J. Warnatz, U. Maas, and R.W. Dibble, Combustion - physical and chemical fundamentals, "Characterization of flame front surfaces in turbulent premixed methane/air combustion," Combustion and Flame 101

  16. 1 1999 Rational Software Corporation The View from the Front

    E-Print Network [OSTI]

    Demurjian, Steven A.

    1 1999 Rational Software Corporation 3/7/99 R UML The View from the Front James Rumbaugh 9 March 1999 Rational Software Corporation #12; 2 1999 Rational Software Corporation 3/7/99 R Evolution Start 1/95 UML 1.3 RTF report 4/99 OMG feedback #12; 3 1999 Rational Software Corporation 3/7/99 R UML

  17. Travel Reimbursement Request Form Submit to: Front Desk

    E-Print Network [OSTI]

    Rose, Michael R.

    Travel Reimbursement Request Form Submit to: Front Desk Department of Pharmaceutial Sciences 147 expenses) If travel time does not include overnight stay (between 7AM - 8PM), the traveler should not claim before 11 AM and arrival after 2 PM; dinner - departure before 5 PM. PM and arrival after 7 PM NOTE

  18. Travel Reimbursement Request Form Submit to: Front Desk

    E-Print Network [OSTI]

    Loudon, Catherine

    Travel Reimbursement Request Form Submit to: Front Desk Department of Pharmaceutical Sciences 147 : Maximum: $71.00 (Itemize meal expenses) If travel time does not include overnight stay (between 7AM - 8PM; lunch - departure before 11 AM and arrival after 2 PM; dinner - departure before 5 PM. PM and arrival

  19. Shielded RF Lattice for the Muon Front End Chris Rogers,

    E-Print Network [OSTI]

    McDonald, Kirk

    Shielded RF Lattice for the Muon Front End Chris Rogers, Accelerator Science and Technology Centre (ASTeC), Rutherford Appleton Laboratory #12; Shielded RF Lattice I wanted to remind folks a lot of slides apologies I've tried to break it up a bit #12; Part 1 Shielded Lattice Baseline

  20. Singular front formation in a model for quasigeostrophic flow Peter Constantin

    E-Print Network [OSTI]

    Tabak, Esteban G.

    Singular front formation in a model for quasigeostrophic flow Peter Constantin Department of Mathematics, University of Chicago, Chicago, Illinois 60637 Andrew J. Majda Department of Mathematics, whether it predicts the formation of sharp fronts associated with boundaries between air masses

  1. Designing and Testing a New Shack-Hartmann High Bandwidth Two-Dimensional Wave front Sensor

    E-Print Network [OSTI]

    Gordeyev, Stanislav

    Designing and Testing a New Shack-Hartmann High Bandwidth Two-Dimensional Wave front Sensor Shaddy Dame, Notre Dame, IN 46656 A novel Shack-Hartmann high bandwidth two-dimensional wave front sensor

  2. Modified Anti-de-Sitter Metric, Light-Front Quantized QCD, and...

    Office of Scientific and Technical Information (OSTI)

    Modified Anti-de-Sitter Metric, Light-Front Quantized QCD, and Conformal Quantum Mechanics Citation Details In-Document Search Title: Modified Anti-de-Sitter Metric, Light-Front...

  3. FELIX: a High-Throughput Network Approach for Interfacing to Front End Electronics for ATLAS Upgrades

    E-Print Network [OSTI]

    Anderson, John Thomas; The ATLAS collaboration; Boterenbrood, Hendrik; Chen, Hucheng; Chen, Kai; Drake, Gary; Francis, David; Gorini, Benedetto; Lanni, Francesco; Lehmann Miotto, Giovanna; Levinson, Lorne; Narevicius, Julia; Plessl, Christian; Roich, Alexander; Ryu, Soo; Schreuder, Frans Philip; Schumacher, Jorn; Vandelli, Wainer; Vermeulen, Jos; Zhang, Jinlong

    2015-01-01

    The ATLAS experiment at CERN is planning full deployment of a new unified optical link technology for connecting detector front end electronics on the timescale of the LHC Run 4 (2025). It is estimated that roughly 8000 GBT (GigaBit Transceiver) links, with transfer rates up to 10.24~Gbps, will replace existing links used for readout, detector control and distribution of timing and trigger information. A new class of devices will be needed to interface many GBT links to the rest of the trigger, data-acquisition and detector control systems. In this paper FELIX (Front End LInk eXchange) is presented, a PC-based device to route data from and to multiple GBT links via a high-performance general purpose network capable of a total throughput up to O(20 Tbps). FELIX implies architectural changes to the ATLAS data acquisition system, such as the use of industry standard COTS components early in the DAQ chain. Additionally the design and implementation of a FELIX demonstration platform is presented, and hardware and ...

  4. Air-sea interaction at an oceanic front: Implications for frontogenesis and primary production

    E-Print Network [OSTI]

    Chen, .Dake

    winds at sharp oceanic fronts, suggesting a potentially important role played by local airAir-sea interaction at an oceanic front: Implications for frontogenesis and primary production Dake a significant air-sea interaction at the shelf- break front in the East China Sea. An idealized ocean

  5. Rapid uplift of nonmethane hydrocarbons in a cold front over central Europe

    E-Print Network [OSTI]

    Arnold, Steve

    Rapid uplift of nonmethane hydrocarbons in a cold front over central Europe R. M. Purvis,1 A. C of a cold front, a rapid uplift of reactive carbon from the boundary layer to the mid free troposphere, convection Citation: Purvis, R. M., et al., Rapid uplift of nonmethane hydrocarbons in a cold front over

  6. Wave-front generation of Zernike polynomial modes with a micromachined membrane

    E-Print Network [OSTI]

    Fainman, Yeshaiahu

    Wave-front generation of Zernike polynomial modes with a micromachined membrane deformable mirror the characteristics of a 37-channel micromachined membrane deformable mirror for wave-front generation. We demonstrate wave-front generation of the first 20 Zernike polynomial modes, using an iterative algorithm to adjust

  7. Application of object oriented programming techniques in front end computers

    SciTech Connect (OSTI)

    Skelly, J.F. [Brookhaven National Lab., Upton, NY (United States). AGS Dept.

    1997-11-01

    The Standard Model for accelerator control systems describes two levels of computers, often called Console Level Computers (CLCs) and Front End Computers (FECs), joined by a network. The Front End Computer (FEC) environment imposes special demands on software, beyond real time performance and robustness. FEC software must manage a diverse inventory of devices with individualistic timing requirements and hardware interfaces. It must implement network services which export device access to the control system at large, interpreting a uniform network communications protocol into the specific control requirements of the individual devices. Object oriented languages provide programming techniques which neatly address these challenges, and also offer benefits in terms of maintainability and flexibility. Applications are discussed which exhibit the use of inheritance, multiple inheritance and inheritance trees, and polymorphism to address the needs of FEC software.

  8. Light Front Quantization with the Light Cone Gauge

    E-Print Network [OSTI]

    D. G. C. McKeon; Chenguang Zhao

    2015-10-07

    The Dirac procedure for dealing with constraints is applied to the quantization of gauge theories on the light front. The light cone gauge is used in conjunction with the first class constraints that arise and the resulting Dirac brackets are found. These gauge conditions are not used to eliminate degrees of freedom from the action prior to applying the Dirac constraint procedure. This approach is illustrated by considering Yang-Mills theory and the superparticle in a 2 + 1 dimensional target space.

  9. A turnstile mechanism for fronts propagating in fluid flows

    E-Print Network [OSTI]

    John R. Mahoney; Kevin A. Mitchell

    2013-05-22

    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.

  10. Frontiers in Global Change Seminar Series

    E-Print Network [OSTI]

    Frontiers in Global Change Seminar Series Short-lived Climate Pollutants: A Second Front in Climate, is not sufficient to ward off this near-term risk. Mitigation of four short-term climate warming pollutants has the Climate and Clean Air Coalition. The seminar will describe the recent scientific developments that led

  11. Phase-Front Solutions and Instabilities in Forced Oscillations Christian Elphick,1 Aric Hagberg,2 and Ehud Meron3

    E-Print Network [OSTI]

    Hagberg, Aric

    ], the ferrocyanide-iodate-sulfite reaction [15, 16], and catalytic surface reactions [17]. Stationary -fronts exist

  12. Energy Loss at Propagating Jamming Fronts in Granular Gas Clusters

    E-Print Network [OSTI]

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

    2013-10-15

    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.

  13. APPLICATION OF OBJECT ORIENTED PROGRAMMING TECHNIQUES IN FRONT END COMPUTERS.

    SciTech Connect (OSTI)

    SKELLY,J.F.

    1997-11-03

    The Front End Computer (FEC) environment imposes special demands on software, beyond real time performance and robustness. FEC software must manage a diverse inventory of devices with individualistic timing requirements and hardware interfaces. It must implement network services which export device access to the control system at large, interpreting a uniform network communications protocol into the specific control requirements of the individual devices. Object oriented languages provide programming techniques which neatly address these challenges, and also offer benefits in terms of maintainability and flexibility. Applications are discussed which exhibit the use of inheritance, multiple inheritance and inheritance trees, and polymorphism to address the needs of FEC software.

  14. Front-end utility rate updates | OpenEI Community

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EA Jump to:ofEnia SpAFlex FuelsEnergyInc| Open EnergyFront-end utility

  15. |Low Graphics version Change edition | |About BBC News Feedback Help News Front Page

    E-Print Network [OSTI]

    England Northern Ireland Scotland Wales Business Politics Health Education Science/Nature Technology Nuclear fusion decision 'urgent' By Alex Kirby BBC News Online environment correspondent in Obninsk, Russia The countries planning to build Iter, the world's biggest nuclear fusion reactor, must choose

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

    SciTech Connect (OSTI)

    Mighton, Steven, J.

    2007-08-06

    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 companys global facility environmental footprint.

  17. Nuclear Physics on the Light Front - a new old way to do an old new problem

    E-Print Network [OSTI]

    Gerald A. Miller

    1999-08-10

    A brief introduction to light front techniques is presented. This is followed by a review of recent attempts to perform realistic, relativistic nuclear physics with those techniques.

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

    E-Print Network [OSTI]

    Oldenburg, Curtis; Pruess, Karsten

    1998-01-01

    FRONT PROPAGATION IN GEOTHERMAL SYSTEMS Curtis M. Oldenburgreinjection in geothermal systems. The numerical simulationcases that can arise in geothermal systems where saturation

  19. Women of Color and Minorities on the Home front during World War II

    E-Print Network [OSTI]

    Sanders-Pinto, Camille

    2015-01-01

    and Minorities on the Home front during World War II ByCamille Sanders-Pinto During World War II minority women

  20. Time series analysis of Adaptive Optics wave-front sensor telemetry...

    Office of Scientific and Technical Information (OSTI)

    for each subaperture are available. The primary problem is performance comparison of alternative wave-front sensing algorithms. Using direct comparison of data in open loop and...

  1. Nonlocal competition and logistic growth: patterns, defects and fronts

    E-Print Network [OSTI]

    Yosef E. Maruvka; Nadav M. Shnerb

    2005-06-22

    Logistic growth of diffusing reactants on spatial domains with long range competition is studied. The bifurcations cascade involved in the transition from the homogenous state to a spatially modulated stable solution is presented, and a distinction is made between a modulated phase, dominated by single or few wavenumbers, and the spiky phase, where localized colonies are separated by depleted region. The characteristic defects in the periodic structure are presented for each phase, together with the invasion dynamics in case of local initiation. It is shown that the basic length scale that controls the bifurcation is the width of the Fisher front, and that the total population grows as this width decreases. A mix of analytic results and extensive numerical simulations yields a comprehensive examination of the possible phases for logistic growth in the presence of nonlocal competition.

  2. High-Level Information An Approach for Integrating Front-End and Back-End Compilers

    E-Print Network [OSTI]

    Li, Zhiyuan

    High-Level Information ­ An Approach for Integrating Front-End and Back-End Compilers Sangyeun Cho-end and back-end compilers by passing front-end information to the back-end compiler. Importing this information into an existing back- end leverages the state-of-the-art analysis and transforma- tion

  3. GLOBAL OPTIMIZATION OF THE MUON COLLIDER/NEUTRINO FACTORY FRONT END

    E-Print Network [OSTI]

    McDonald, Kirk

    GLOBAL OPTIMIZATION OF THE MUON COLLIDER/NEUTRINO FACTORY FRONT END HISHAM SAYED BROOKHAVEN MEETING 10 September 2013 #12;GLOBALLY OPTIMIZING MUON TARGET & FRONT END 9/10/13 2 in bunches #12;INTRODUCTION & LAYOUT ? High performance Optimization Tools on NERSC ? Target: ?

  4. Are mesoscale eddies in shelf seas formed by baroclinic instability of tidal fronts?

    E-Print Network [OSTI]

    Williams, Ric

    Are mesoscale eddies in shelf seas formed by baroclinic instability of tidal fronts? G. Badin,1 R; accepted 23 July 2009; published 27 October 2009. [1] The formation of eddies along tidal fronts signals are dampened by air-sea interaction and eroded by wind and tidal mixing. High-resolution CTD

  5. SCIPP-04/03 Characterization the Front-End electronics in order to

    E-Print Network [OSTI]

    California at Santa Cruz, University of

    SCIPP-04/03 Characterization the Front-End electronics in order to Calibrate the PTSM Completed by-End electronics of the PTSM, data was collected on the gain of the system. This was done using known quantities a value known as Time Over Threshold (TOT). The TOT is measured by the PTSM Front-End (FE) electronics

  6. Title of Dissertation: NONLINEAR DYNAMICS OF EXTENDED SYSTEMS: CHAOS FRONTS, RARE INTENSE EVENTS,

    E-Print Network [OSTI]

    Anlage, Steven

    ABSTRACT Title of Dissertation: NONLINEAR DYNAMICS OF EXTENDED SYSTEMS: CHAOS FRONTS, RARE INTENSE Edward Ott Department of Physics We investigate the nonlinear dynamics of three extended systems: chaos considered as nodes and actors as links. #12;NONLINEAR DYNAMICS OF EXTENDED SYSTEMS: CHAOS FRONTS, RARE

  7. Historical Fire Regimes in Ponderosa Pine Forests of the Colorado Front Range, and

    E-Print Network [OSTI]

    Historical Fire Regimes in Ponderosa Pine Forests of the Colorado Front Range, and Recommendations scientific understanding of historical fire regimes in the forested landscapes of Colorado's Front Range and the Colorado-Wyoming border. This article focuses on forests in which ponderosa pine is a dominant or co

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

    E-Print Network [OSTI]

    Gohm, Alexander

    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

  9. A Review of Cold Fronts with Prefrontal Troughs and Wind Shifts DAVID M. SCHULTZ

    E-Print Network [OSTI]

    Schultz, David

    A Review of Cold Fronts with Prefrontal Troughs and Wind Shifts DAVID M. SCHULTZ Cooperative with a pressure trough and a distinct wind shift at the surface. Many cold fronts, however, do not conform to this model--time series at a single surface station may possess a pressure trough and wind shift in the warm

  10. A Comprehensive Energy Model and Energy-Quality Evaluation of Wireless Transceiver Front-Ends

    E-Print Network [OSTI]

    Kambhampati, Subbarao

    1 A Comprehensive Energy Model and Energy-Quality Evaluation of Wireless Transceiver Front-Ends Y and a multi-user CDMA based system with respect to RF front end energy consumption and communication quality section of a wireless transceiver consumes more energy than the digital part. For better understanding

  11. APPLICATIONS OF FRONT TRACKING TO THE SIMULATION OF RESIN TRANSFER MOLDING

    E-Print Network [OSTI]

    New York at Stoney Brook, State University of

    APPLICATIONS OF FRONT TRACKING TO THE SIMULATION OF RESIN TRANSFER MOLDING Yu Song 1 2 Department: Computers & Mathematics with applications Abstract Resin Transfer Molding, as a method for the manufacture enhance product quality. Key words. resin transfer molding, composite materials, front tracking

  12. Finding the Salt Front: Page 1 Saltwater fish like flounder move up

    E-Print Network [OSTI]

    Lance, Veronica P.

    upriver, which is 20-50 mg/L. The salt front's location is given in Hudson River Miles (abbreviated HRM). Hudson River Miles start at Manhattan's southern tip. This spot, called the Battery, is HRM 0. Going north, Yonkers is at HRM 18, Poughkeepsie at HRM 75. The salt front moves with the tides, weather

  13. Persistence of zero velocity fronts in reaction diffusion systems Lorenz Kramer

    E-Print Network [OSTI]

    Gottwald, Georg A.

    Persistence of zero velocity fronts in reaction diffusion systems Lorenz Kramer Physikalisches; accepted for publication 15 June 2000 Steady, nonpropagating, fronts in reaction diffusion systems usually velocity may become zero only at isolated values where the Maxwell condition is satisfied, for potential

  14. FRONT SPEEDS IN THE VANISHING DIFFUSION LIMIT FOR REACTION-DIFFUSION-CONVECTION EQUATIONS

    E-Print Network [OSTI]

    Mascia, Corrado

    velocity. This convergence also yields a reaction- independent sufficient condition for the minimalFRONT SPEEDS IN THE VANISHING DIFFUSION LIMIT FOR REACTION-DIFFUSION-CONVECTION EQUATIONS E.C.M. CROOKS AND C. MASCIA Abstract. Travelling fronts for scalar balance laws with monostable reaction

  15. Three universality classes for reaction fronts in disordered flows Severine Atis,1

    E-Print Network [OSTI]

    Wiese, Kay Jörg

    flow, the chemical reaction produces traveling waves with velocity V0 inside the medium. An additionalThree universality classes for reaction fronts in disordered flows S´everine Atis,1 Awadhesh Kumar-sustained reaction fronts in a disordered medium subject to an external flow display self-affine roughening, pinning

  16. Wave Front Interaction Model of Stabilized Propagating Wave Segments Vladimir S. Zykov1

    E-Print Network [OSTI]

    Showalter, Kenneth

    Wave Front Interaction Model of Stabilized Propagating Wave Segments Vladimir S. Zykov1 and Kenneth; published 14 February 2005) A wave front interaction model is developed to describe the relationship between excitability and the size and shape of stabilized wave segments in a broad class of weakly excitable media

  17. Observed low frequency variability of the Brazil Current front Gustavo Jorge Goni,1

    E-Print Network [OSTI]

    of the Brazil Current front. Trends of eddy kinetic energy, sea height anomaly, sea surface temperature and windObserved low frequency variability of the Brazil Current front Gustavo Jorge Goni,1 Francis Bringas; published 29 October 2011. [1] The Brazil Current is a weak western boundary current, the southwest

  18. PHYSICAL REVIEW E 87, 012901 (2013) Pinning-depinning transition of fronts between standing waves

    E-Print Network [OSTI]

    Gavilan, Marcel G. Clerc

    2013-01-01

    PHYSICAL REVIEW E 87, 012901 (2013) Pinning-depinning transition of fronts between standing waves behaviors of fronts connecting standing waves, such as the locking phenomenon, pinning-depinning transitions between standing waves. In the driven pendulum chain, using a Galerkin expansion we characterize

  19. MESOSCALE ANALYSIS OF A CAROLINA COASTAL FRONT SETHU RAMAN, NEERAJA C. REDDY and DEVDUTTA S. NIYOGI

    E-Print Network [OSTI]

    Niyogi, Dev

    MESOSCALE ANALYSIS OF A CAROLINA COASTAL FRONT SETHU RAMAN, NEERAJA C. REDDY and DEVDUTTA S. NIYOGI the shore. Key words: GALE, Coastal front, Atmospheric boundary layer, Gulf Stream, Mesoscale analysis turbulent heat fluxes. These strong gradients in heat fluxes enhance mesoscale circulation

  20. Coarsening of precipitation patterns in a moving reaction-diffusion front A. Volford,1

    E-Print Network [OSTI]

    Rcz, Zoltn

    Coarsening of precipitation patterns in a moving reaction-diffusion front A. Volford,1 I. Lagzi,2 November 2009 Precipitation patterns emerging in a two-dimensional moving front are investigated on the example of NaOH diffusing into a gel containing AlCl3. The time evolution of the precipitate Al OH 3 can

  1. PHYSICAL REVIEW E 88, 022141 (2013) Helices in the wake of precipitation fronts

    E-Print Network [OSTI]

    Rcz, Zoltn

    2013-01-01

    PHYSICAL REVIEW E 88, 022141 (2013) Helices in the wake of precipitation fronts Shibi Thomas,1 of the emergence of helices in the wake of precipitation fronts is presented. The precipitation dynamics studies [7,8] in which helical precipitation patterns were observed in the wake of moving reaction

  2. Effect of Initial Disturbance on The Detonation Front Structure of a Narrow Duct

    E-Print Network [OSTI]

    Dou, Hua-Shu

    2010-01-01

    The effect of an initial disturbance on the detonation front structure in a narrow duct is studied by three-dimensional numerical simulation. The numerical method used includes a high resolution fifth-order weighted essentially non-oscillatory scheme for spatial discretization, coupled with a third order total variation diminishing Runge-Kutta time stepping method. Two types of disturbances are used for the initial perturbation. One is a random disturbance which is imposed on the whole area of the detonation front, and the other is a symmetrical disturbance imposed within a band along the diagonal direction on the front. The results show that the two types of disturbances lead to different processes. For the random disturbance, the detonation front evolves into a stable spinning detonation. For the symmetrical diagonal disturbance, the detonation front displays a diagonal pattern at an early stage, but this pattern is unstable. It breaks down after a short while and it finally evolves into a spinning detonati...

  3. The AdS/CFT Correspondence and Light-Front QCD

    E-Print Network [OSTI]

    Stanley J. Brodsky; Guy F. de Teramond

    2008-10-10

    We identify an invariant light-front coordinate $\\zeta$ which allows the separation of 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. This frame-independent light-front wave equation is equivalent to the equations of motion which describe the propagation of spin-$J$ modes on anti-de Sitter (AdS) space. Light-front holography is a remarkable feature of AdS/CFT: it 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. In principle, the model can be systematically improved by diagonalizing the full QCD light-front Hamiltonian on the AdS/QCD basis. Quark and gluon hadronization can be computed at the amplitude level by convoluting the off-shell $T$ matrix calculated from the QCD light-front Hamiltonian with the hadronic light-front wavefunctions. We also note the distinction between static observables such as the probability distributions computed from the square of the light-front wavefunctions versus dynamical observables such as the structure functions and the leading-twist single-spin asymmetries measured in deep inelastic scattering which include the effects of initial and final-state interactions.

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

    E-Print Network [OSTI]

    Powell, Johnna, 1980-

    2009-01-01

    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 ...

  5. Inhibition of slug front corrosion in multiphase flow conditions

    SciTech Connect (OSTI)

    Chen, H.J.; Jepson, W.P.

    1998-12-31

    Corrosion at the slug front at the bottom of a pipeline is identified as one of the worst cases of corrosion occurring in the pipeline which carries unprocessed multiphase production with a high level of CO{sub 2} gas. One objective of the study in recommending a subsea completion to shore was to determine if commercial corrosion inhibitors can control this type of corrosion using carbon steel pipeline. Thus, inhibitors which showed excellent performance in the lab using the Rotating Cylinder Electrode system (RCE) were further evaluated to confirm their performance in a flow loop simulating the test conditions predicted from the flow modeling for the proposed pipeline. The performance profile of two commercial inhibitors were determined in a 4 in. flow loop at 7O C, 100 psig CO{sub 2} partial pressure in corrosive brines with or without ethylene glycol and/or light hydrocarbon. Results showed that the carbon steel pipeline could be adequately protected at low temperature using a commercial corrosion inhibitor to meet the designed life of the pipeline. Ethylene glycol, which is used in the pipeline to prevent hydrate formation, reduces the corrosivity of the brine and gives no effect on inhibitor performance under the slug flow conditions. A good agreement in inhibitor performance was observed between the flow loop and the RCE testing. The uninhibited corrosion rate of the test brine in this study is in good agreement with the predicted value using deWaard and Williams correlation for CO{sub 2} corrosion.

  6. Double parton correlations in Light-Front constituent quark model

    E-Print Network [OSTI]

    Matteo Rinaldi; Sergio Scopetta; Marco Traini; Vicente Vento

    2014-12-09

    Double parton distribution functions (dPDF) represent a tool to explore the 3D proton structure. They can be measured in high energy proton-proton and proton nucleus collisions and encode information on how partons inside a proton are correlated among each other. dPFDs are studied here in the valence quark region, by means of a constituent quark model, where two particle correlations are present without any additional prescription. This framework allows to understand the dynamical origin of the correlations and to clarify which, among the features of the results, are model independent. Use will be made of a relativistic light-front scheme, able to overcome some drawbacks of the previous calculation. Transverse momentum correlations, due to the exact treatment of the boosts, are predicted and analyzed. The role of spin correlations is also shown. Due to the covariance of the approach, some symmetries of the dPDFs are seen unambigously. For the valence sector, the study of the QCD evolution of the model results, which can be performed safely thanks to the property of good support, has been also completed.

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

    E-Print Network [OSTI]

    Stanley J. Brodsky; Guy F. de Teramond

    2009-09-22

    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.

  8. Tidal front affects the size of prey used by a top marine predator, the short-tailed shearwater (Puffinus tenuirostris)

    E-Print Network [OSTI]

    Tidal front affects the size of prey used by a top marine predator, the short-tailed shearwater densities of small euphausiids were associated with a tidal front on the north side of Akutan Pass. At most sites elsewhere in the Bering Sea, away from tidal fronts, shearwaters selected larger (14.220.1 mm

  9. Travelling fronts of the CO oxidation on Pd(111) with coverage-dependent diffusion

    SciTech Connect (OSTI)

    Cisternas, Jaime, E-mail: jecisternas@miuandes.cl [Facultad de Ingeniera y Ciencias Aplicadas, Universidad de los Andes, Monseor Alvaro del Portillo 12455, Las Condes, Santiago (Chile); Karpitschka, Stefan [Physics of Fluids, University of Twente, Drienerlolaan 5, 7522 NB Enschede (Netherlands); Wehner, Stefan [Institut fr Integrierte Naturwissenschaften - Physik, Universitt Koblenz-Landau, 56070 Koblenz (Germany)

    2014-10-28

    In this work, we study a surface reaction on Pd(111) crystals under ultra-high-vacuum conditions that can be modeled by two coupled reaction-diffusion equations. In the bistable regime, the reaction exhibits travelling fronts that can be observed experimentally using photo electron emission microscopy. The spatial profile of the fronts reveals a coverage-dependent diffusivity for one of the species. We propose a method to solve the nonlinear eigenvalue problem and compute the direction and the speed of the fronts based on a geometrical construction in phase-space. This method successfully captures the dependence of the speed on control parameters and diffusivities.

  10. A new approach to front-?end electronics interfacing in the ATLAS experiment

    E-Print Network [OSTI]

    Borga, Andrea; The ATLAS collaboration; Lanni, Francesco; Lehmann Miotto, Giovanna; Levinson, Lorne; Narevicius, Julia; Roich, Alexander; Schreuder, Frans Philip; Schumacher, J\\"orn; Vandelli, Wainer; Vermeulen, Jos; Ryu, Soo; Zhang, Jinlong; Anderson, John Thomas; Boterenbrood, Hendrik; Chen, Kai; Chen, Hucheng; Drake, Gary; Donszelmann, Mark; Francis, David

    2015-01-01

    For new detector and trigger systems to be installed in the ATLAS experiment after LHC Run 2 a new approach will be followed for front-end electronics interfacing. The FELIX (Front-End Link eXchange) system will interface to links connecting to front-end detector and trigger electronics instead of the RODs (ReadOut Drivers) currently used. FELIX will function as a gateway to a commodity switched network built using standard technology (either Ethernet or Infiniband). In the paper the new approach will be described and results of the demonstrator program currently in progress will be presented.

  11. This page does not print. Please use front-and-back

    E-Print Network [OSTI]

    Duchowski, Andrew T.

    This page does not print. Please use front-and-back cover layout at end of file. #12;Craig Mahaffey's astonishing to realize that the same basic knowledge used to conserve a historic submarine can be applied

  12. The effects of laminar mixing on reaction fronts and patterns I. Introduction

    E-Print Network [OSTI]

    Solomon, Tom

    The effects of laminar mixing on reaction fronts and patterns I. Introduction A wide variety scales that are often smaller than a micron. For small Re, the flow is laminar; in this situation

  13. Vehicle Technologies Office Merit Review 2015: Magnesium-Intensive Front End Sub-Structure Development

    Broader source: Energy.gov [DOE]

    Presentation given by USAMP at 2015 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about magnesium-intensive front end sub...

  14. Dynamic stabilization of Rayleigh-Taylor instability: Experiments with Newtonian fluids as surrogates for ablation fronts

    SciTech Connect (OSTI)

    Rodriguez Prieto, G.; Piriz, A. R.; Lopez Cela, J. J. [E.T.S.I. Industriales and Instituto de Investigaciones Energeticas (INEI), Universidad de Castilla-La Mancha, 13071 Ciudad Real (Spain); Tahir, N. A. [GSI Helmholtzzentrum fuer Schwerionenforschung, Planckstrasse 1, 64291 Darmstadt (Germany)

    2013-01-15

    A previous theory on dynamic stabilization of Rayleigh-Taylor instability at interfaces between Newtonian fluids is reformulated in order to make evident the analogy of this problem with the related one on dynamic stabilization of ablation fronts in the framework of inertial confinement fusion. Explicit analytical expressions are obtained for the boundaries of the dynamically stable region which turns out to be completely analogue to the stability charts obtained for the case of ablation fronts. These results allow proposing experiments with Newtonian fluids as surrogates for studying the case of ablation fronts. Experiments with Newtonian fluids are presented which demonstrate the validity of the theoretical approach and encourage to pursue experimental research on ablation fronts to settle the feasibility of dynamic stabilization in the inertial confinement fusion scenario.

  15. Modified Anti-de-Sitter Metric, Light-Front Quantized QCD, and...

    Office of Scientific and Technical Information (OSTI)

    Modified Anti-de-Sitter Metric, Light-Front Quantized QCD, and Conformal Quantum Mechanics Dosch, Hans Gunter; U. Heidelberg, ITP; Brodsky, Stanley J.; SLAC; de Teramond, Guy F.;...

  16. Toto the Robot Figure 1. Toto, front view. Figure 2. Toto, rear view.

    E-Print Network [OSTI]

    Indiana University

    Toto the Robot Figure 1. Toto, front view. Figure 2. Toto, rear view. Toto the Robot was created so a robot, helps account for his lack of verbal charm. Second, some younger children may recognize in Toto

  17. Nitrogen Front Evolution in Purged Polymer Electrolyte Membrane Fuel Cell with Dead-Ended Anode

    E-Print Network [OSTI]

    Stefanopoulou, Anna

    Nitrogen Front Evolution in Purged Polymer Electrolyte Membrane Fuel Cell with Dead-Ended Anode plugging of the channels, and flooding of the gas diffusion layer. The observation of each phenomenon

  18. Front Solutions for Bistable Differential-Difference Equations with Inhomogeneous Diffusion

    E-Print Network [OSTI]

    Humphries, A. R.; Moore, Brian E.; Van Vleck, Erik

    2011-08-09

    We consider a bistable differential-difference equation with inhomogeneous diffusion. Employing a piecewise linear nonlinearity, often referred to as McKean's caricature of the cubic, we construct front solutions which ...

  19. Low-Cost Differential Front-End for Doppler Radar Vital Sign Monitoring

    E-Print Network [OSTI]

    Fletcher, Richard Ribon

    We present a differential front end design for improving the performance of short-range low-cost Doppler radars for vital sign detection with application to automotive driver safety systems, health monitoring, and security ...

  20. Climate Change and Conceptual Change

    E-Print Network [OSTI]

    Clark, David Joseph

    2013-01-01

    1.1.2 The Stark Reality of Climate Change . . . . . . . .1.2 Climate Change as a BehavioralEducation for Climate Change . . . . 1.4.1 The Numerically

  1. A 25 m.y. isotopic record of paleodiet and environmental change from fossil mammals and paleosols from the NE margin

    E-Print Network [OSTI]

    ; paleoecology; climate change 0012-821X/$ - see front matter D 2005 Elsevier B.V. All rights reserved. doi:10 and organic matter preserve a proxy record of paleoecology and paleo- climate in terrestrial ecosystems [1

  2. AdS/QCD and Applications of Light-Front Holography

    SciTech Connect (OSTI)

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

    2012-02-16

    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.

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

    DOE Patents [OSTI]

    Battiste, Richard L. (Oak Ridge, TN)

    2007-12-25

    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 the mold space through the openings, the fluid experiencing a dynamic fluid front while filling the mold space with the fluid; and characterizing temporal-spatial properties of the dynamic fluid front by monitoring a temperature 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 the mold 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.

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

    DOE Patents [OSTI]

    Battiste, Richard L

    2013-12-31

    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.

  5. Deep Chandra observation and numerical studies of the nearest cluster cold front in the sky

    E-Print Network [OSTI]

    Werner, N; Zhuravleva, I; Ichinohe, Y; Simionescu, A; Allen, S W; Markevitch, M; Fabian, A C; Keshet, U; Roediger, E; Ruszkowski, M; Sanders, J S

    2015-01-01

    We present the results of a very deep (500 ks) Chandra observation, along with tailored numerical simulations, of the nearest, best resolved cluster cold front in the sky, which lies 90 kpc (19 arcmin) to the northwest of M 87. The northern part of the front appears the sharpest, with a width smaller than 2.5 kpc (1.5 Coulomb mean free paths; at 99 per cent confidence). Everywhere along the front, the temperature discontinuity is narrower than 4-8 kpc and the metallicity gradient is narrower than 6 kpc, indicating that diffusion, conduction and mixing are suppressed across the interface. Such transport processes can be naturally suppressed by magnetic fields aligned with the cold front. However, the northwestern part of the cold front is observed to have a nonzero width. The broadening is consistent with the presence of Kelvin-Helmholtz instabilities (KHI) on length scales of a few kpc. Based on comparison with simulations, the presence of KHI would imply that the effective viscosity of the intra-cluster medi...

  6. Two: Standing in Front of the California Ballot-Box Train: The Present and Past of Ballot-Box Budgeting

    E-Print Network [OSTI]

    Mitchell, Daniel J.B.; Hirsch, Werner Z.

    2006-01-01

    STANDING IN FRONT OF THE CALIFORNIA BALLOT TRAIN: THEdecline of the Governors standing in various polls. Thethe Paterno case. 87 Standing in the background were

  7. Apparatus and method for phase fronts based on superluminal polarization current

    DOE Patents [OSTI]

    Singleton, John (Los Alamos, NM); Ardavan, Houshang (Cambridge, GB); Ardavan, Arzhang (Cambridge, GB)

    2012-02-28

    An apparatus and method for a radiation source involving phase fronts emanating from an accelerated, oscillating polarization current whose distribution pattern moves superluminally (that is, faster than light in vacuo). Theoretical predictions and experimental measurements using an existing prototype superluminal source show that the phase fronts from such a source can be made to be very complex. Consequently, it will be very difficult for an aircraft imaged by such a radiation to detect where this radiation has come from. Moreover, the complexity of the phase fronts makes it almost impossible for electronics on an aircraft to synthesize a rogue reflection. A simple directional antenna and timing system should, on the other hand, be sufficient for the radar operators to locate the aircraft, given knowledge of their own source's speed and modulation pattern.

  8. Granular front formation in free-surface flow of concentrated suspensions

    E-Print Network [OSTI]

    Leonardi, A; Wittel, F K; Kaitna, R; Mendoza, M; Wu, W; Herrmann, H J

    2015-01-01

    Granular fronts are a common yet unexplained phenomenon emerging during the gravity driven free-surface flow of concentrated suspensions. They are usually believed to be the result of fluid convection in combination with particle size segregation. However, suspensions composed of uniformly sized particles also develop a granular front. Within a large rotating drum, a stationary recirculating avalanche is generated. The flowing material is a mixture of a visco-plastic fluid obtained from a kaolin-water dispersion, with spherical ceramic particles denser than the fluid. The goal is to mimic the composition of many common granular-fluid materials, like fresh concrete or debris flow. In these materials, granular and fluid phases have the natural tendency to segregate due to particle settling. However, through the shearing caused by the rotation of the drum, a reorganization of the phases is induced, leading to the formation of a granular front. By tuning the material properties and the drum velocity, it is possib...

  9. A Model for Tracking Fronts of Stress-Induced Permeability Enhancement

    E-Print Network [OSTI]

    K. C. Lewis; Satish Karra; Sharad Kelkar

    2013-05-15

    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.

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

    SciTech Connect (OSTI)

    Brett Carlsen; Emily Tavrides; Erich Schneider

    2010-08-01

    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.

  11. On the movement of a liquid front in an unsaturated, fractured porous medium, Part 1

    SciTech Connect (OSTI)

    Nitao, J.J.; Buscheck, T.A.

    1989-06-01

    The primary aim of this paper is to present approximate analytical solutions of the fracture flow which gives the position of the liquid fracture front as a function of time. These solutions demonstrate that the liquid movement in the fracture can be classified into distinctive time periods, or flow regimes. It is also shown that when plotted versus time using a log-log scale, the liquid fracture front position asymptotically approaches a series of line segments. Two-dimensional numerical simulations were run utilizing input data applicable to the densely welded, fractured tuff found at Yucca Mountain in order to confirm these observations. 19 refs., 15 figs., 8 tabs.

  12. A new approach to front-end electronics interfacing in the ATLAS experiment

    E-Print Network [OSTI]

    Anderson, John Thomas; The ATLAS collaboration; Boterenbrood, Hendrik; Chen, Hucheng; Chen, Kai; Drake, Gary; Donszelmann, Mark; Francis, David; Gorini, Benedetto; Lanni, Francesco; Lehmann Miotto, Giovanna; Levinson, Lorne; Narevicius, Julia; Roich, Alexander; Ryu, Soo; Schreuder, Frans Philip; Schumacher, J\\"orn; Vandelli, Wainer; Vermeulen, Jos; Wu, Weihao; Zhang, Jinlong

    2015-01-01

    For new detector and trigger systems to be installed in the ATLAS experiment after LHC Run 2, a new approach will be followed for Front-End electronics interfacing. The FELIX (Front-End LInk eXchange) system will function as gateway connecting: on one side to detector and trigger electronics links, as well as providing timing and trigger (TTC) information; and on the other side a commodity switched network built using standard technology (either Ethernet or Infiniband). The new approach is described in this paper, and results achieved so far are presented.

  13. Eddy conductivity in and near dry cold fronts in the layer, 70 to 1270 feet

    E-Print Network [OSTI]

    Conlan, Edward Francis

    1965-01-01

    EDDY CONDUCTIVITY IN AND NEAR DRY COLD FRONTS IN THE LAYER, 70 TO 1270 FEET A Thesis By EDWARD FRANCIS CONLAN Captain, USAF Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE January 1965 Major Subject: METEOROLOGY EDDY CONDUCTIVITY IN AND NEAR DRY COLD FRONTS IN THE LAYER) 70 TO 1270 FEET A Thesis By EDWARD FRANCIS CONLAN Captain, USAF Approved as to style and content by: i J 8~. . c6~h arrmanf o...

  14. Change Log

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

    Log NERSC-8 Trinity Benchmarks Change Log 09032013 Correction applied to MiniDFT web-page (to remove inconsistency with MiniDFT README). Capability Improvement...

  15. Pinning and mode-locking of reaction fronts by vortices Garrett M. O'Malley, Matthew S. Paoletti 1

    E-Print Network [OSTI]

    Solomon, Tom

    not understood, even for well-ordered, laminar flows. In many cases, transport in a fluid flow is diffusivediffusion (RD) limit with no fluid flows, the speed at which a reaction front propagates was predicted involved in the reaction [7,11]. The effects of fluid flows on front behavior, however, is still

  16. Chemical Reaction Fronts in Ordered and Disordered Cellular Flows with Opposing Winds M. E. Schwartz* and T. H. Solomon

    E-Print Network [OSTI]

    Ligare, Martin

    simply propagates at its reaction-diffusion (no flow) velocity minus the wind speed. If the same wind-dependent flows as well. In the absence of fluid flows, a front propagates with a reaction-diffusion (RD) velocityChemical Reaction Fronts in Ordered and Disordered Cellular Flows with Opposing Winds M. E

  17. Sensitivity of Mesoscale Gravity Waves to the Baroclinicity of Jet-Front Systems SHUGUANG WANG AND FUQING ZHANG

    E-Print Network [OSTI]

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

  18. 41On the Water Front I Dr. Peter H. Gleick and Ms. Meena Palaniappan Palaniappan

    E-Print Network [OSTI]

    by a growing competition for water, increasing ecological degradation associated with human extraction of water41On the Water Front I Dr. Peter H. Gleick and Ms. Meena Palaniappan Ms. Meena Palaniappan Director, International Water and Communities Initiative Pacific Institute for Studies in Development, Environment

  19. Stable or unstable wetting fronts in water repellent soils effect of antecedent soil moisture content

    E-Print Network [OSTI]

    Walter, M.Todd

    contents during the experiment, which caused the soil to be wettable instead of water repellent. The waterStable or unstable wetting fronts in water repellent soils effect of antecedent soil moisture content Coen J. Ritsemaa,* , John L. Nieberb , Louis W. Dekkera , T.S. Steenhuisc a DLO Winand Staring

  20. Green radio despite "Dirty RF" front-end Myriam Ariaudo*1

    E-Print Network [OSTI]

    Fijalkow, Inbar

    design, which reduces the chip area and the number of components (Green #12;design) or facilitate. Concerning the RF part, designing a Green radio first consists in the improvement of efficiency. It is well front-end imperfections can participate in the design of Green radio. Some of these corrections enable

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

    E-Print Network [OSTI]

    M. M. Sheikh-Jabbari; A. Tureanu

    2010-10-02

    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.

  2. Correction to "Precursor activation and substorm expansion associated with observations of a dipolarization front by Thermal

    E-Print Network [OSTI]

    California at Berkeley, University of

    Correction to "Precursor activation and substorm expansion associated with observations of a dipolarization front by Thermal Emission Imaging System (THEMIS)" C. L. Tang, V. Angelopoulos, A. Runov, C. T, K. H. Fornacon, and Z. Y. Li (2010), Correction to "Precursor activation and substorm expansion

  3. Stability of negative ionization fronts: Regularization by electric screening? Manuel Arrayas1,2

    E-Print Network [OSTI]

    Ebert, Ute

    investigate how transversal Fourier modes of a planar ionization front are regularized by the electric the formation of cusps. The nature of this regularization has to be derived from the underlying gas discharge physics; it recently has been a subject of debate 13,14 . We argue that one regular- ization mechanism

  4. Granular front formation in free-surface flow of concentrated suspensions

    E-Print Network [OSTI]

    A. Leonardi; M. Cabrera; F. K. Wittel; R. Kaitna; M. Mendoza; W. Wu; H. J. Herrmann

    2015-02-19

    Granular fronts are a common yet unexplained phenomenon emerging during the gravity driven free-surface flow of concentrated suspensions. They are usually believed to be the result of fluid convection in combination with particle size segregation. However, suspensions composed of uniformly sized particles also develop a granular front. Within a large rotating drum, a stationary recirculating avalanche is generated. The flowing material is a mixture of a visco-plastic fluid obtained from a kaolin-water dispersion, with spherical ceramic particles denser than the fluid. The goal is to mimic the composition of many common granular-fluid materials, like fresh concrete or debris flow. In these materials, granular and fluid phases have the natural tendency to segregate due to particle settling. However, through the shearing caused by the rotation of the drum, a reorganization of the phases is induced, leading to the formation of a granular front. By tuning the material properties and the drum velocity, it is possible to control this phenomenon. The setting is reproduced in a numerical environment, where the fluid is solved by a Lattice-Boltzmann Method, and the particles are explicitly represented using the Discrete Element Method. The simulations confirm the findings of the experiments, and provide insight into the internal mechanisms. Comparing the time-scale of particle settling with the one of particle recirculation, a non-dimensional number is defined, and is found to be effective in predicting the formation of a granular front.

  5. An analytical approach to initiation of propagating fronts I. Idris and V. N. Biktashev

    E-Print Network [OSTI]

    Biktashev, Vadim N.

    situations as self heating in metals and superconductors, phase transitions, combustion and other chemical, but an abovethreshold per turbation can create a propagating pulse wave of finite length and duration, in the wake of which the system returns to the resting state. The front of an excitable pulse is often

  6. An analytical approach to initiation of propagating fronts I. Idris and V. N. Biktashev

    E-Print Network [OSTI]

    Biktashev, Vadim N.

    situations as self- heating in metals and superconductors, phase transitions, combustion and other chemical, but an above-threshold per- turbation can create a propagating pulse wave of finite length and duration, in the wake of which the system returns to the resting state. The front of an excitable pulse is often

  7. Hierarchical Modelling of Automotive Sensor Front-Ends For Structural Diagnosis of Aging Faults

    E-Print Network [OSTI]

    Wieringa, Roel

    functions previously handled purely mechanical. In addition hybrid and pure electrical cars are emerging are hybrid and electrical cars. The automotive semiconductor elec- tronics market amounted to 19.5 billion for the development of dependable analogue/mixed-signal car front-ends, by interfacing aging models between different

  8. Photo-isomerization fronts in dye-doped nematic liquid crystals

    E-Print Network [OSTI]

    Gavilan, Marcel G. Clerc

    Photo-isomerization fronts in dye-doped nematic liquid crystals V. Odent,1, * M. G. Clerc,1 C study of the photo-isomerization dynamics in dye-doped nematic crystals is reported, which shows that and thus induc- ing a photo-controlled optical aperture. The optical intensity and temperature fields

  9. Measurement of freezing point depression of water in glass capillaries and the associated ice front shape

    E-Print Network [OSTI]

    Wan, Richard G.

    Measurement of freezing point depression of water in glass capillaries and the associated ice front Variations of the Kelvin equation W. Thomson, Philos. Mag. 42, 448 1871 to describe the freezing point. The capillary freezing point depression for glass tubes with radii of 87 m3 m was successfully measured

  10. Export of Asian pollution during two cold front episodes of the TRACE-P experiment

    E-Print Network [OSTI]

    Palmer, Paul

    Export of Asian pollution during two cold front episodes of the TRACE-P experiment C. Mari how these cyclonic systems have impacted the export of pollution out of the Asian continent. We of pollution are met during flight 13 (i.e., the occurrences of the warm conveyor belt near the source regions

  11. Nucleon and flavor form factors in a light front quark model in AdS/QCD

    E-Print Network [OSTI]

    Dipankar Chakrabarti; Chandan Mondal

    2013-12-05

    Using the light front wave functions for the nucleons in a quark model in AdS/QCD, we calculate the nucleon electromagnetic form factors. The flavor decompositions of the nucleon form factors are calculated from the GPDs in this model. We show that the nucleon form factors and their flavor decompositions calculated in AdS/QCD are in agreement with experimental data.

  12. Dynamical evolution of RayleighTaylor and RichtmyerMeshkov mixing fronts Baolian Cheng

    E-Print Network [OSTI]

    New York at Stoney Brook, State University of

    derive an analytic solution for the dynamic evolution of mixing fronts driven by constant acceleration system produce buoyancy and shear driven instabilities at an interface between distinct fluids #1 Rayleigh­Taylor #RT# and impulsive acceleration Richtmyer­Meshkov instabilities, from a simple physics

  13. Pulse-front tilt created in misaligned dispersionless optical systems and correct interferometric

    E-Print Network [OSTI]

    Dreischuh, Alexander

    Pulse-front tilt created in misaligned dispersionless optical systems and correct interferometric-temporal distortions of ultrashort laser pulses. Special attention is given to the possible creation of a pulse of the ultrashort pulses in the presence of an arbitrary PFT . Key words: spatio-temporal distortion, dispersionless

  14. InertiaGravity Waves Spontaneously Generated by Jets and Fronts. Part I: Different Baroclinic Life Cycles

    E-Print Network [OSTI]

    Plougonven, Riwal

    InertiaGravity Waves Spontaneously Generated by Jets and Fronts. Part I: Different Baroclinic Life the initial zonal jet. The wave generation depends strongly on the details of the baroclinic wave of waves being generated. These studies agree with evi- dence from observations [e.g., the key role of jet

  15. Why are there stationary EIT wave fronts Chen, P. F. a

    E-Print Network [OSTI]

    Chen, P. F.

    -8471, Japan Abstract EIT waves are often observed to be propagating EUV enhancements followed by an expanding in the framework of our model where "EIT waves" are supposed to be generated by successive opening of the fieldWhy are there stationary EIT wave fronts Chen, P. F. a , C. Fang a , K. Shibata b a

  16. Turbulent premixed flame front dynamics and implications for limits of flamelet hypothesis

    E-Print Network [OSTI]

    Glder, mer L.

    of methaneair and propaneair stabilized on a Bunsen-type burner were studied to investigate the dynamics. The equivalence ratio was varied from 0.6 (0.7 for propane) to stoichiometric. The flame front data were obtained The Combustion Institute. Published by Elsevier Inc. All rights reserved. Keywords: Turbulent premixed flames

  17. Coherent States and Spontaneous Symmetry Breaking in Light Front Scalar Field Theory

    SciTech Connect (OSTI)

    Vary, J.P.; Chakrabarti, D.; Harindranath, A.; Lloyd, R.; Martinovic, L.; Spence, J.R.; /Iowa State U.

    2005-12-14

    Recently developed nuclear many-body techniques provide novel results when applied to constituent quark models and to light-front scalar field theory. We show how spontaneous symmetry breaking arises and is consistent with a coherent state ansatz in a variational treatment. The kink and the kink-antikink topological features are identified and the onset of symmetry restoration is demonstrated.

  18. Bloch-Front Turbulence in a Periodically Forced Belousov-Zhabotinsky Reaction Bradley Marts,1

    E-Print Network [OSTI]

    Meron, Ehud

    , Los Alamos, New Mexico 87545, USA 3 Department of Solar Energy and Environmental Physics, BIDR, Ben involving continual events of spiral-vortex nucleation and destruction. Using the amplitude equation for forced oscillatory systems and the normal form equations for a curved front line, we identify

  19. Sensitivity of mesoscale gravity waves to the baroclinicity of jet-front systems

    E-Print Network [OSTI]

    Wang, Shuguang

    2006-04-12

    To investigate the generation of mesoscale gravity waves from upper-tropospheric jet-front systems, five different life cycles of baroclinic waves are simulated with a high-resolution mesoscale model (MM5 with 10-km grid spacing). The baroclinicity...

  20. Rapid uplift of nonmethane hydrocarbons in a cold front over central Europe

    E-Print Network [OSTI]

    Hoskins, Brian

    Rapid uplift of nonmethane hydrocarbons in a cold front over central Europe R. M. Purvis,1 A. C of 21 C2C7 nonmethane hydrocarbons (NMHCs) has been determined in planetary boundary layer (PBL between the PBL and FT was observed for all short and medium lifetime hydrocarbons (e.g., average iso

  1. Local waiting time fluctuations along a randomly pinned crack front Knut Jrgen Maly,1

    E-Print Network [OSTI]

    Toussaint, Renaud

    that the fracture front dynamics is governed by local and irregular avalanches with very large size and velocity a characteristic length scale of disorder Ld 15m, the avalanche clusters become anisotropic, and the scaling- ting contact lines [1315], where elasticity and disorder compete to shape the interface. In order

  2. Local Waiting Time Fluctuations along a Randomly Pinned Crack Front Knut Jrgen Maly,1

    E-Print Network [OSTI]

    Schmittbuhl, Jean

    is followed using a high resolution fast camera. We show that the fracture front dynamics is governed by local:7 0:1. Above a characteristic length scale of disorder Ld 15 m, the avalanche clusters become elas- ticity and disorder compete to shape the interface. In order to shed some light

  3. The Influence of an SST Front on a Heavy Rainfall Event Over Coastal Taiwan During

    E-Print Network [OSTI]

    Johnson, Richard H.

    1 The Influence of an SST Front on a Heavy Rainfall Event Over Coastal Taiwan During TiMREX Michael-lived heavy precipitation area was observed along the southwest coast of Taiwan3 from 13-18 June 2008 during in the sea surface temperature (SST) off the southwest coast of8 Taiwan existed during the rainfall event

  4. A NOTE ON FRONT TRACKING AND THE EQUIVALENCE BETWEEN VISCOSITY SOLUTIONS OF HAMILTON-JACOBI EQUATIONS

    E-Print Network [OSTI]

    A NOTE ON FRONT TRACKING AND THE EQUIVALENCE BETWEEN VISCOSITY SOLUTIONS OF HAMILTON-JACOBI solution of the Hamilton-Jacobi equation u t + H(ux ) = 0. In our proof we work directly with the de#12 conservation laws to Hamilton-Jacobi equations and derive some of its properties. 1. Introduction It is well

  5. Tracking the Salt Front: Teacher's Section Page 1 Hudson River Estuary Program

    E-Print Network [OSTI]

    Lance, Veronica P.

    on each tide cycle. The front's location is given in Hudson River Miles (HRM), starting at the southern tip of Manhattan. This spot, called The Battery, is HRM 0. Ocean tides influence the Hudson north to the Federal Dam at Troy (HRM 153). Activity: 1. In preparation for this lesson, have students do the ELA

  6. Steady-state propagation speed of rupture fronts along 1D frictional interfaces

    E-Print Network [OSTI]

    Amundsen, David Sklid; Thgersen, Kjetil; Katzav, Eytan; Malthe-Srenssen, Anders; Scheibert, Julien

    2015-01-01

    The rupture of dry frictional interfaces occurs through the propagation of fronts breaking the contacts at the interface. Recent experiments have shown that the velocities of these rupture fronts range from quasi-static velocities proportional to the external loading rate to velocities larger than the shear wave speed. The way system parameters influence front speed is still poorly understood. Here we study steady-state rupture propagation in a 1D spring-block model of an extended frictional interface, for various friction laws. With the classical Amontons--Coulomb friction law, we derive a closed-form expression for the steady-state rupture velocity as a function of the interfacial shear stress just prior to rupture. We then consider an additional shear stiffness of the interface and show that the softer the interface, the slower the rupture fronts. We provide an approximate closed form expression for this effect. We finally show that adding a bulk viscosity on the relative motion of blocks accelerates stead...

  7. Propagation in a kinetic reaction-transport equation: travelling waves and accelerating fronts

    E-Print Network [OSTI]

    Calvez, Vincent

    describes particles moving according to a velocity-jump process, and proliferating thanks to a reaction termPropagation in a kinetic reaction-transport equation: travelling waves and accelerating fronts the existence and stability of travelling wave solutions of a kinetic reaction- transport equation. The model

  8. Nonuniform reaction rate distribution for the generalized Fisher equation: Ignition ahead of the reaction front

    E-Print Network [OSTI]

    Fedotov, Sergei

    equation involving diffusion transport with a finite velocity and a spatially nonuniform reaction rate. WeNonuniform reaction rate distribution for the generalized Fisher equation: Ignition ahead of the reaction front Sergei Fedotov* Department of Mathematics, UMIST, Manchester M60 1QD, United Kingdom

  9. Front speed enhancement in cellular flows Institute of Physics, Potsdam University, 14415 Potsdam, Germany

    E-Print Network [OSTI]

    Cencini, Massimo

    .g., in combustion. However, many features can be understood by neglecting the back-reaction on the velocity field flows in three different regimes: slow reaction, fast reaction and geometrical optics limit. It is well speed as a function of the stirring intensity, U. For slow reaction, the front propagates with a speed

  10. Front propagation in a kinetic reaction-transport equation Emeric Bouin

    E-Print Network [OSTI]

    Boyer, Edmond

    according to a velocity-jump process, and proliferating thanks to a reaction term of monostable typeFront propagation in a kinetic reaction-transport equation Emeric Bouin , Vincent Calvez wave solutions of a kinetic reaction- transport equation. The model describes particles moving

  11. Snapshot Day 10/17/14 Data (Salt Front RM 65.3)

    E-Print Network [OSTI]

    Lance, Veronica P.

    Snapshot Day 10/17/14 Data (Salt Front RM 65.3) RIVER MILE 53 Garrison Landing Park Cathy Bakker, Hudson Highlands Land Trust Kevin Keegan, Garrison Union Free School 7th graders 27 students, 6 adults 41 22 57 N 73 36 93 W Location: Garrison Landing Park, Garrison, Putnam County, NY Area: Waterfront

  12. Continuous Planning With Winding Constraints Using Optimal Heuristic-Driven Front Propagation

    E-Print Network [OSTI]

    LaValle, Steven M.

    Continuous Planning With Winding Constraints Using Optimal Heuristic-Driven Front Propagation the winding-constrained optimal feedback navigation problem. Given the start and the goal positions and the winding con- straints, the solution to this problem is a feedback vector field such that, when integrated

  13. Physical model of back line-contact front-junction solar cells Andres Cuevas

    E-Print Network [OSTI]

    electron-collector region is made by thermal dif- fusion of phosphorus, and the localized metal contactsPhysical model of back line-contact front-junction solar cells Andres Cuevas Citation: J. Appl-junction solar cells Andres Cuevasa) Research School of Engineering, The Australian National University, Canberra

  14. Do Debris Flows Pose a Hazard to Mountain-Front Property in Metropolitan Phoenix, Arizona?

    E-Print Network [OSTI]

    Dorn, Ron

    Do Debris Flows Pose a Hazard to Mountain-Front Property in Metropolitan Phoenix, Arizona? Ronald I by growing suburbs of metropoli- tan Phoenix, Arizona, including on steep slopes above large single hazard in Phoenix and perhaps other grow- ing cities in the desert Southwest. Key Words: debris flow

  15. A Framework for Machine Vision based on Neuro-Mimetic Front End Processing and Clustering

    E-Print Network [OSTI]

    Madhow, Upamanyu

    A Framework for Machine Vision based on Neuro-Mimetic Front End Processing and Clustering Emre") convolutional nets [1], [2], [3], [4], which loosely mimic the natural hierarchy of visual processing. Neuro, including retinal ganglion cells (RGCs) and the lateral geniculate nucleus (LGN), along with the simple

  16. Polymer Motors: Pushing out the Front and Pulling up the Back

    E-Print Network [OSTI]

    Oster, George

    Polymer Motors: Pushing out the Front and Pulling up the Back Alex Mogilner1 and George Oster2 and disassembly of polymers. We review the mechanisms of pushing and pulling by actin and microtubule filaments and the organizational principles of actin networks. We show how these polymer force generators are used

  17. Continuous Change Institutional Change Principle

    Broader source: Energy.gov [DOE]

    ecause 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.

  18. 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]

    Powell, Jesse Russell

    California Current System. California Cooperative Oceanicsystem. Oceanic fronts, particularly within boundary currentCalifornia Current System. California Cooperative Oceanic

  19. Airborne Emissions from Storage Tanks: What's New on the Regulatory Front and How to Cope with the Changes

    E-Print Network [OSTI]

    Ferry, R. L.

    1996-01-01

    ofcontrol. Kb Level of Control The Kb level ofcontrol considers as the uncontrolled base case aflXed-rooftank (FRT) equipped with vapor conservation vents which relieve excess pressure or vacuum. These PN vents, as shown in Figure I, exhaust vapors... directly to the atmosphere. Kb requires that either the surface of the liquid stock is covered with a floating roof, subject to certain Figure 1 Fixed-RoofTank design requirements, or that the exhaust from the FRT vents is directed to a vapor...

  20. Method of fabricating conductive electrodes on the front and backside of a thin film structure

    DOE Patents [OSTI]

    Tabada, Phillipe J. (Roseville, CA); Tabada, legal representative, Melody (Roseville, CA); Pannu, Satinderpall S. (Pleasanton, CA)

    2011-05-22

    A method of fabricating a thin film device having conductive front and backside electrodes or contacts. Top-side cavities are first formed on a first dielectric layer, followed by the deposition of a metal layer on the first dielectric layer to fill the cavities. Defined metal structures are etched from the metal layer to include the cavity-filled metal, followed by depositing a second dielectric layer over the metal structures. Additional levels of defined metal structures may be formed in a similar manner with vias connecting metal structures between levels. After a final dielectric layer is deposited, a top surface of a metal structure of an uppermost metal layer is exposed through the final dielectric layer to form a front-side electrode, and a bottom surface of a cavity-filled portion of a metal structure of a lowermost metal layer is also exposed through the first dielectric layer to form a back-side electrode.

  1. SiPM and front-end electronics development for Cherenkov light detection

    E-Print Network [OSTI]

    Ambrosi, G; Bissaldi, E; Ferri, A; Giordano, F; Gola, A; Ionica, M; Paoletti, R; Piemonte, C; Paternoster, G; Simone, D; Vagelli, V; Zappala, G; Zorzi, N

    2015-01-01

    The Italian Institute of Nuclear Physics (INFN) is involved in the development of a demonstrator for a SiPM-based camera for the Cherenkov Telescope Array (CTA) experiment, with a pixel size of 6$\\times$6 mm$^2$. The camera houses about two thousands electronics channels and is both light and compact. In this framework, a R&D program for the development of SiPMs suitable for Cherenkov light detection (so called NUV SiPMs) is ongoing. Different photosensors have been produced at Fondazione Bruno Kessler (FBK), with different micro-cell dimensions and fill factors, in different geometrical arrangements. At the same time, INFN is developing front-end electronics based on the waveform sampling technique optimized for the new NUV SiPM. Measurements on 1$\\times$1 mm$^2$, 3$\\times$3 mm$^2$, and 6$\\times$6 mm$^2$ NUV SiPMs coupled to the front-end electronics are presented

  2. Superconformal Baryon-Meson Symmetry and Light-Front Holographic QCD

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

    Dosch, Hans Guenter; de Teramond, Guy F.; Brodsky, Stanley J.

    2015-04-10

    We construct an effective QCD light-front Hamiltonian for both mesons and baryons in the chiral limit based on the generalized supercharges of a superconformal graded algebra. The superconformal construction is shown to be equivalent to a semi-classical approximation to light-front QCD and its embedding in AdS space. The specific breaking of conformal invariance inside the graded algebra uniquely determines the effective confinement potential. The generalized supercharges connect the baryon and meson spectra to each other in a remarkable manner. In particular, the ?/b1 Regge trajectory is identified as the superpartner of the nucleon trajectory. However, the lowest-lying state on thismoretrajectory, the ?-meson is massless in the chiral limit and has no supersymmetric partner.less

  3. Gravity changes and passive SO2 degassing at the Masaya caldera complex, Nicaragua

    E-Print Network [OSTI]

    Williams-Jones, Glyn

    Gravity changes and passive SO2 degassing at the Masaya caldera complex, Nicaragua Glyn Williams-gravity; passive degassing; persistent activity; convection 1. Introduction Located in western Nicaragua, Masaya. The main edice-building activity 0377-0273 / 03 / $ ^ see front matter 2003 Elsevier Science B.V. All

  4. Soil water content dependent wetting front characteristics in sands T.W.J. Bautersa

    E-Print Network [OSTI]

    Walter, M.Todd

    Soil water content dependent wetting front characteristics in sands T.W.J. Bautersa , D.A. Di 94305, USA Received 2 April 1999; accepted 13 August 1999 Abstract The initial soil water content into a 20/30 sand with initial volumetric water contents of 0, 0.005, 0.01, 0.015, 0.02, 0.03, 0.04 and 0

  5. Method and apparatus for generating radiation utilizing DC to AC conversion with a conductive front

    DOE Patents [OSTI]

    Dawson, John M. (Pacific Palisades, CA); Mori, Warren B. (Hermosa Beach, CA); Lai, Chih-Hsiang (So. Pasadena, CA); Katsouleas, Thomas C. (Malibu, CA)

    1998-01-01

    Method and apparatus for generating radiation of high power, variable duration and broad tunability over several orders of magnitude from a laser-ionized gas-filled capacitor array. The method and apparatus convert a DC electric field pattern into a coherent electromagnetic wave train when a relativistic ionization front passes between the capacitor plates. The frequency and duration of the radiation is controlled by the gas pressure and capacitor spacing.

  6. Clustering, fronts, and heat transfer in turbulent suspensions of heavy particles

    E-Print Network [OSTI]

    Bec, Jeremie; Krstulovic, Giorgio

    2014-01-01

    Heavy inertial particles transported by a turbulent flow are shown to concentrate in the regions where an advected passive scalar, such as temperature, displays very strong front-like discontinuities. This novel effect is responsible for extremely high levels of fluctuations for the passive field sampled by the particles that impacts the heat fluxes exchanged between the particles and the surrounding fluid. Instantaneous and averaged heat fluxes are shown to follow strongly intermittent statistics and anomalous scaling laws.

  7. Merging Cold Fronts in the Galaxy Pair NGC 7619 and NGC 7626

    E-Print Network [OSTI]

    S. W. Randall; C. Jones; R. Kraft; W. R. Forman; E. O'Sullivan

    2009-01-22

    We present results from {\\it Chandra} observations of the galaxy pair NGC 7619 and NGC 7626, the two dominant members of the Pegasus group. The X-ray images show a brightness edge associated with each galaxy, which we identify as merger cold fronts. The edges are sharp, and the axes of symmetry of the edges are roughly anti-parallel, suggesting that these galaxies are falling towards one another in the plane of the sky. The detection of merger cold fronts implies a merging subgroup scenario, since the alternative is that the galaxies are falling into a pre-existing $\\sim1$ keV halo without a dominant galaxy of its own, and such objects are not observed. We estimate the 3D velocities from the cold fronts and show that the velocity vectors are indeed most likely close to the plane of the sky, with a relative velocity of $\\sim1190\\kms$. The relative velocity is consistent with what is expected from the infall of two roughly equal mass subgroups whose total viral mass equals that of the Pegasus group. We conclude that the Pegasus cluster is currently forming from a major merger of two subgroups, dominated by NGC 7619 and NGC 7626. NGC 7626 contains a strong radio source, a core with two symmetric jets and radio lobes. Although we find no associated structure in the X-ray surface brightness map, the temperature map reveals a clump of cool gas just outside the southern lobe, presumably entrained by the lobe, and an extension of cooler gas into the lobe itself. The jet axis is parallel with the projected direction of motion of NGC 7626 (inferred from the symmetry axis of the merger cold front), and the southern leading jet is foreshortened as compared to the northern trailing one, possibly due to the additional ram pressure the forward jet encounters.

  8. Fast and slow magnetic deflagration fronts in Type I X-ray bursts

    E-Print Network [OSTI]

    Cavecchi, Yuri; Watts, Anna L; Braithwaite, Jonathan

    2015-01-01

    Type I X-ray bursts are produced by thermonuclear runaways that develop on accreting neutron stars. Once one location ignites, the flame propagates across the surface of the star. Flame propagation is fundamental in order to understand burst properties like rise time and burst oscillations. Previous work quantified the effects of rotation on the front, showing that the flame propagates as a deflagration and that the front strongly resembles a hurricane. However the effect of magnetic fields was not investigated, despite the fact that magnetic fields strong enough to have an effect on the propagating flame are expected to be present on many bursters. In this paper we show how the coupling between fluid layers introduced by an initially vertical magnetic field plays a decisive role in determining the character of the fronts that are responsible for the Type I bursts. In particular, on a star spinning at 450 Hz (typical among the bursters) we test seed magnetic fields of $10^{7} - 10^{10}$ G and find that for th...

  9. FBI Fingerprint Image Capture System High-Speed-Front-End throughput modeling

    SciTech Connect (OSTI)

    Rathke, P.M.

    1993-09-01

    The Federal Bureau of Investigation (FBI) has undertaken a major modernization effort called the Integrated Automated Fingerprint Identification System (IAFISS). This system will provide centralized identification services using automated fingerprint, subject descriptor, mugshot, and document processing. A high-speed Fingerprint Image Capture System (FICS) is under development as part of the IAFIS program. The FICS will capture digital and microfilm images of FBI fingerprint cards for input into a central database. One FICS design supports two front-end scanning subsystems, known as the High-Speed-Front-End (HSFE) and Low-Speed-Front-End, to supply image data to a common data processing subsystem. The production rate of the HSFE is critical to meeting the FBI`s fingerprint card processing schedule. A model of the HSFE has been developed to help identify the issues driving the production rate, assist in the development of component specifications, and guide the evolution of an operations plan. A description of the model development is given, the assumptions are presented, and some HSFE throughput analysis is performed.

  10. The New Front-End Electronics for the ATLAS Tile Calorimeter Phase 2 Upgrade

    E-Print Network [OSTI]

    Drake, Gary; The ATLAS collaboration

    2015-01-01

    We present the plans, design, and performance results to date ofor the new front-end electronics being developed for the Phase 2 Upgrade of the ATLAS Tile Calorimeter. The front-end electronics will be replaced to address the increase in beam energy and luminosity planned for the LHC around 2023, as well as to upgrade to faster, more modern components with higher radiation tolerance. The new electronics will operate dead-timelessly, pushing full data sets from each beam crossing to the data acquisition system that resides off-detector in the USA15 counting room. The new electronics contains five main parts: the front-end boards that connect directly to the photo-multiplier tubes; the Main Boards that digitize the data; the Daughter Boards that collect the data streams and contain the high-speed optical communication links for writing data to the data acquisition system; a programmable high voltage control system; and a new low-voltage power supply. There are different options for implementing these subcompone...

  11. Resource intensities of the front end of the nuclear fuel cycle

    SciTech Connect (OSTI)

    Schneider, E.; Phathanapirom, U.; Eggert, R.; Collins, J.

    2013-07-01

    This paper presents resource intensities, including direct and embodied energy consumption, land and water use, associated with the processes comprising the front end of the nuclear fuel cycle. These processes include uranium extraction, conversion, enrichment, fuel fabrication and depleted uranium de-conversion. To the extent feasible, these impacts are calculated based on data reported by operating facilities, with preference given to more recent data based on current technologies and regulations. All impacts are normalized per GWh of electricity produced. Uranium extraction is seen to be the most resource intensive front end process. Combined, the energy consumed by all front end processes is equal to less than 1% of the electricity produced by the uranium in a nuclear reactor. Land transformation and water withdrawals are calculated at 8.07 m{sup 2} /GWh(e) and 1.37x10{sup 5} l/GWh(e), respectively. Both are dominated by the requirements of uranium extraction, which accounts for over 70% of land use and nearly 90% of water use.

  12. Light-front representation of chiral dynamics in peripheral transverse densities

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

    Granados, Carlos G.; Weiss, Christian

    2015-07-31

    The nucleon's electromagnetic form factors are expressed in terms of the transverse densities of charge and magnetization at fixed light-front time. At peripheral transverse distances b = O(M_pi^{-1}) the densities are governed by chiral dynamics and can be calculated model-independently using chiral effective field theory (EFT). We represent the leading-order chiral EFT results for the peripheral transverse densities as overlap integrals of chiral light-front wave functions, describing the transition of the initial nucleon to soft pion-nucleon intermediate states and back. The new representation (a) explains the parametric order of the peripheral transverse densities; (b) establishes an inequality between the spin-independentmoreand -dependent densities; (c) exposes the role of pion orbital angular momentum in chiral dynamics; (d) reveals a large left-right asymmetry of the current in a transversely polarized nucleon and suggests a simple interpretation. The light-front representation enables a first-quantized, quantum-mechanical view of chiral dynamics that is fully relativistic and exactly equivalent to the second-quantized, field-theoretical formulation. It relates the charge and magnetization densities measured in low-energy elastic scattering to the generalized parton distributions probed in peripheral high-energy scattering processes. The method can be applied to nucleon form factors of other operators, e.g. the energy-momentum tensor.less

  13. Light-front representation of chiral dynamics in peripheral transverse densities

    E-Print Network [OSTI]

    C. Granados; C. Weiss

    2015-03-16

    The nucleon's electromagnetic form factors are expressed in terms of the transverse densities of charge and magnetization at fixed light-front time. At peripheral transverse distances $b = O(M_\\pi^{-1})$ the densities are governed by chiral dynamics and can be calculated model-independently using chiral effective field theory (EFT). We represent the leading-order chiral EFT results for the peripheral transverse densities as overlap integrals of chiral light-front wave functions, describing the transition of the initial nucleon to soft pion-nucleon intermediate states and back. The new representation (a) explains the parametric order of the peripheral transverse densities; (b) establishes an inequality between the spin-independent and -dependent densities; (c) exposes the role of pion orbital angular momentum in chiral dynamics; (d) reveals a large left-right asymmetry of the current in a transversely polarized nucleon and suggests a simple interpretation. The light-front representation enables a first-quantized, quantum-mechanical view of chiral dynamics that is fully relativistic and exactly equivalent to the second-quantized, field-theoretical formulation. It relates the charge and magnetization densities measured in low-energy elastic scattering to the generalized parton distributions probed in peripheral high-energy scattering processes. The method can be applied to nucleon form factors of other operators, e.g. the energy-momentum tensor.

  14. Change Log

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News PublicationsAudits &BradburyMay 1,CenterJohnCeremony TheChallenges andChange LogChange

  15. EVOLUTIONARY CHANGE the evolution of change management

    E-Print Network [OSTI]

    Emmerich, Michael

    page 1 EVOLUTIONARY CHANGE the evolution of change management by Jeroen van der Zon University, evolutionary change is studied by describing the evolution of Change Manage- ment (CM). CM is one . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3 Modelling Change Management

  16. An Eta-model output study of frontogenesis conditions favoring development of a troposphere-spanning front

    E-Print Network [OSTI]

    Stewart, Jeffrey Paul

    1999-01-01

    the formation of a troposphere spanning front, tilting, confluent and shear deformation terms of the Petterssen and other applicable frontogenesis equations were evaluated utilizing numerical model output of the Eta model. The outcome of this study indicates...

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

    E-Print Network [OSTI]

    Munajat

    2012-07-16

    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 ...

  18. 0011-9164/09/$ See front matter 2008 Elsevier B.V. All rights reserved Desalination 239 (2009) 1021

    E-Print Network [OSTI]

    2009-01-01

    0011-9164/09/$ See front matter 2008 Elsevier B.V. All rights reserved Desalination 239 (2009. / Desalination 239 (2009) 1021 11 use as irrigation water, process water, or a source of potable water

  19. The Central American cold surge: an observational analysis of the deep southward penetration of North American cold fronts

    E-Print Network [OSTI]

    Reding, Philip John

    1992-01-01

    THE CENTRAL AMERICAN COLD SURGE: AN OBSERVATIONAL ANALYSIS OF THE DEEP SOUTHWARD PENETRATION OF NORTH AMERICAN COLD FRONTS A Thesis by PHILIP JOHN REDING Submitted to the Office of Graduate Studies of Texas A &M University in partial... fulfillment of the requirements for the degree of MASTER OF SCIENCE December 1992 Major Subject: Meteorology THE CENTRAL AMERICAN COLD SURGE: AN OBSERVATIONAL ANALYSIS OF THE DEEP SOUTHWARD PENETRATION OF NORTH AMERICAN COLD FRONTS A Thesis by PHILIP...

  20. Unstructured grids in 3D and 4D for a time-dependent interface in front tracking with improved accuracy

    SciTech Connect (OSTI)

    Glimm, J.; Grove, J. W. (John W.); Li, X. L.; Li, Y. (Yingjie); Xu, Z. (Zhilang)

    2002-01-01

    Front tracking traces the dynamic evolution of an interface separating differnt materials or fluid components. In this paper, they describe three types of the grid generation methods used in the front tracking method. One is the unstructured surface grid. The second is a structured grid-based reconstruction method. The third is a time-space grid, also grid based, for a conservative tracking algorithm with improved accuracy.

  1. Satellite observations and numerical simulations of jet-front gravity waves over North America and North Atlantic Ocean

    E-Print Network [OSTI]

    Zhang, Meng

    2008-10-10

    SIMULATIONS OF JET-FRONT GRAVITY WAVES OVER NORTH AMERICA AND NORTH ATLANTIC OCEAN A Thesis by MENG ZHANG Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE August 2008 Major Subject: Atmospheric Sciences SATELLITE OBSERVATIONS AND NUMERICAL SIMULATIONS OF JET-FRONT GRAVITY WAVES OVER NORTH AMERICA AND NORTH ATLANTIC OCEAN A Thesis by MENG ZHANG Submitted to the Office...

  2. [Front Matter

    E-Print Network [OSTI]

    2009-01-01

    bargaining agreement (CBA) on May 20, 2008, it spelled2 in favor of the current CBA were now opting out of it onlybonuses themselves, as well as the CBA, contain forfeiture

  3. [Front Matter

    E-Print Network [OSTI]

    2012-01-01

    agreed to in 2006 (the 2006 CBA). That night, nine currentallegedly violated the 2006 CBA, retired players fought forlawsuits and agreed to a new CBA (the 2011 CBA) without

  4. [Front Matter

    E-Print Network [OSTI]

    2007-01-01

    Calvert . The FBI in July 2006 beganor other motivations did the FBI have for suddenly beginningselective enforcement by the FBI in terms of which companies

  5. [Front Matter

    E-Print Network [OSTI]

    2008-01-01

    speech protection. Inside the FBI Inspections of Adult Movieconducted by the authors with FBI Supervisory Special AgentChuck Joyner at the FBI office in Los Angeles. Whereas the

  6. Front Matter

    E-Print Network [OSTI]

    2015-01-01

    UCLA Journal of Environmental Law and Policy is funded by:UCLA Journal of Environmental Law and Policy. All RightsUCLA Journal of Environmental Law and Policy is edited and

  7. Front Matter

    E-Print Network [OSTI]

    n/a, n/a

    2006-01-01

    by J. Shadid, USAlD, Mali \\'(IOm. 'U1 ufahamu-n. [Swahili]and will be moving back to Mali thereafter. "Umar Tall: The

  8. Section: Front

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust, High-ThroughputUpcomingmagnetoresistanceand Governmentm D m r ecmswL, Attachment

  9. front cover

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorkingLosThe 26th Annual Conference onDickAlThe30/03foalResolving9

  10. front cover

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorkingLosThe 26th Annual Conference onDickAlThe30/03foalResolving9Preferred

  11. front cover

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorkingLosThe 26th Annual Conference

  12. Front cover

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (Journal Article)Forthcoming UpgradesArea: PADD 1 to PADD 2Fri, 0909,Wed,

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

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustments (Billion Cubic Feet)DecadeYear Jan Feb Mar Apr May Jun20032,485,331Gas2001 ES1 Figure

  14. Climate Change 2007: Mitigation of Climate Change.

    E-Print Network [OSTI]

    Schiavon, Stefano; Zecchin, Roberto

    2007-01-01

    2007: Mitigation of Climate Change. Full report. WorkingIntergovernmental Panel on Climate Change www.webcda.it LaIntergovernmental Panel on Climate Change. Il Rapporto

  15. Change Number

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D BGene Network ShapingDate: M-16-04-04 Federal FacilityChange Number

  16. Change Number

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D BGene Network ShapingDate: M-16-04-04 Federal FacilityChange

  17. CS Chang

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News PublicationsAudits &BradburyMay 1, 2013, 4:15pmEnergyNovemberCompute 1CS Chang CS

  18. Change Log

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News PublicationsAudits &BradburyMay 1,CenterJohnCeremony TheChallenges andChange Log

  19. Intermittent Peel Front Dynamics and the Crackling Noise in an Adhesive Tape

    E-Print Network [OSTI]

    Jagadish Kumar; Rumi De; G. Ananthakrishna

    2008-12-01

    We report a comprehensive investigation of a model for peeling of an adhesive tape along with a nonlinear time series analysis of experimental acoustic emission signals in an effort to understand the origin of intermittent peeling of an adhesive tape and its connection to acoustic emission. The model represents the acoustic energy dissipated in terms of Rayleigh dissipation functional that depends on the local strain rate. We show that the nature of the peel front exhibits rich spatiotemporal patterns ranging from smooth, rugged and stuck-peeled configurations that depend on three parameters, namely, the ratio of inertial time scale of the tape mass to that of the roller, the dissipation coefficient and the pull velocity. The stuck-peeled configurations are reminiscent of fibrillar peel front patterns observed in experiments. We show that while the intermittent peeling is controlled by the peel force function, the model acoustic energy dissipated depends on the nature of the peel front and its dynamical evolution. Even though the acoustic energy is a fully dynamical quantity, it can be quite noisy for a certain set of parameter values suggesting the deterministic origin of acoustic emission in experiments. To verify this suggestion, we have carried out a dynamical analysis of experimental acoustic emission time series for a wide range of traction velocities. Our analysis shows an unambiguous presence of chaotic dynamics within a subinterval of pull speeds within the intermittent regime. Time series analysis of the model acoustic energy signals is also found to be chaotic within a subinterval of pull speeds.

  20. Resonant Coherent Excitation of Fast Hydrogen Atoms in Front of a LiF(001) Surface

    SciTech Connect (OSTI)

    Auth, C.; Mertens, A.; Winter, H.; Borisov, A.G.; Garcia de Abajo, F.J.

    1997-12-01

    We have scattered protons and hydrogen atoms with energies of some keV from a LiF(001) surface under a grazing angle of incidence. From the intensity of Lyman-{alpha} radiation (transition from n=2 to n=1, {lambda}=121.6 nm ) as a function of projectile energy for different azimuthal orientations of the crystal surface, we find clear evidence for a resonant coherent excitation of n=2 states of hydrogen atoms in the oscillating electric field in front of the insulator surface. {copyright} {ital 1997} {ital The American Physical Society}

  1. On the ion front of a plasma expanding into a vacuum

    SciTech Connect (OSTI)

    Allen, J. E.; University College, Oxford, Oxford OX1 4BH ; Perego, M.

    2014-03-15

    Calculations are reported on the expansion of a plasma into a vacuum, using a model of cold ions and Boltzmann electrons. The initial distribution of the ions at the edge of the plasma greatly affects the subsequent expansion. An initial abrupt drop of ion density leads to an expansion in which the abrupt drop is maintained. A finite slope, however, leads to the formation of a peak of ion density at the ion front. The subsequent behaviour may lead to wave breaking and the formation of multi-valued ion velocity distributions.

  2. Medium Corrections to the Nucleon Electroweak Observables in a Light-Front Quark Model

    SciTech Connect (OSTI)

    Araujo, W.R.B. de; Suisso, E.F.; Batista, E.F.; Carlson, B.V.; Frederico, T. [Dep. de Fisica, Instituto Tecnologico de Aeronautica, Centro Tecnico Aeroespacial, 12.228-900 Sao Jose dos Campos, Sao Paulo (Brazil)

    2004-12-02

    We study the nuclear medium effects on the proton electromagnetic form factor ratio GEp/GMp within a light-front constituent quark model with different quark spin coupling schemes and momentum components of the wave functions. We compute only effects from the quark and nucleon in-medium masses. The effective masses are obtained from a relativistic {sigma} - {omega} self-consistent mean-field approximation of the nuclear matter within a quark-meson coupling model. Our calculation describes qualitatively the recent experimental data.

  3. MERGING COLD FRONTS IN THE GALAXY PAIR NGC 7619 AND NGC 7626

    SciTech Connect (OSTI)

    Randall, S. W.; Jones, C.; Kraft, R.; Forman, W. R.; O'Sullivan, E.

    2009-05-10

    We present results from Chandra observations of the galaxy pair NGC 7619 and NGC 7626, the two dominant members of the Pegasus group. The X-ray images show a brightness edge associated with each galaxy, which we identify as merger cold fronts. The edges are sharp, and the axes of symmetry of the edges are roughly antiparallel, suggesting that these galaxies are falling toward one another in the plane of the sky. The detection of merger cold fronts in each of the two dominant member galaxies implies a merging subgroup scenario, since the alternative is that the galaxies are falling into a preexisting {approx}1 keV halo without a dominant galaxy of its own, and such objects are not observed. We estimate the three-dimensional velocities from the cold fronts and, using the observed radial velocities of the galaxies, show that the velocity vectors are indeed most likely close to the plane of the sky, with a relative velocity of {approx}1190 km s{sup -1}. The relative velocity is consistent with what is expected from the infall of two roughly equal mass subgroups whose total viral mass equals that of the Pegasus group. We conclude that the Pegasus cluster is most likely currently forming from a major merger of two subgroups, dominated by NGC 7619 and NGC 7626. NGC 7626 contains a strong radio source, consisting of a core with two symmetric jets, and radio lobes. Although we find no associated structure in the X-ray surface brightness map, the temperature map reveals a clump of cool gas just outside the southern lobe, presumably entrained by the lobe, and possibly an extension of cooler gas into the lobe itself. The jet axis is parallel with the projected direction of motion of NGC 7626 (inferred from the symmetry axis of the merger cold front), and the southern leading jet is foreshortened as compared to the northern trailing one, possibly due to the additional ram pressure encountered by the forward jet.

  4. Meso and microscale features of the lower portion of cold fronts

    E-Print Network [OSTI]

    Beniura, Hideo

    1962-01-01

    to Fig. 1 (After Petterssen, 1961). Figure 3. Figure 4. Advancing mass of cold air (After Prandtl, 19S2), Tower network and its location relative to Dallas and Amon Carter Field. Figure 5. The sectional surface chart for 1200 GMT, 22 November 1961... the ground will usually have an upward component. Bergeron mentions the figure of 1 to 4 km above the sur'face as the lower edge of the descending air, In 1910 Schmidt studied a laboratory model of a cold front in which the analog between cold and wsxm...

  5. Adapting wave-front algorithms to efficiently utilize systems with deep communication hierarchies

    SciTech Connect (OSTI)

    Kerbyson, Darren J; Lang, Michael; Pakin, Scott

    2009-01-01

    Large-scale systems increasingly exhibit a differential between intra-chip and inter-chip communication performance. Processor-cores on the same socket are able to communicate at lower latencies, and with higher bandwidths, than cores on different sockets either within the same node or between nodes. A key challenge is to efficiently use this communication hierarchy and hence optimize performance. We consider here the class of applications that contain wave-front processing. In these applications data can only be processed after their upstream neighbors have been processed. Similar dependencies result between processors in which communication is required to pass boundary data downstream and whose cost is typically impacted by the slowest communication channel in use. In this work we develop a novel hierarchical wave-front approach that reduces the use of slower communications in the hierarchy but at the cost of additional computation and higher use of on-chip communications. This tradeoff is explored using a performance model and an implementation on the Petascale Roadrunner system demonstrates a 27% performance improvement at full system-scale on a kernel application. The approach is generally applicable to large-scale multi-core and accelerated systems where a differential in system communication performance exists.

  6. Interferometric adaptive optics for high power laser pointing, wave-front control and phasing

    SciTech Connect (OSTI)

    Baker, K L; Stappaerts, E A; Homoelle, D C; Henesian, M A; Bliss, E S; Siders, C W; Barty, C J

    2009-01-21

    Implementing the capability to perform fast ignition experiments, as well as, radiography experiments on the National Ignition Facility (NIF) places stringent requirements on the control of each of the beam's pointing and overall wavefront quality. One quad of the NIF beams, 4 beam pairs, will be utilized for these experiments and hydrodynamic and particle-in-cell simulations indicate that for the fast ignition experiments, these beams will be required to deliver 50% (4.0 kJ) of their total energy (7.96 kJ) within a 40 {micro}m diameter spot at the end of a fast ignition cone target. This requirement implies a stringent pointing and overall phase conjugation error budget on the adaptive optics system used to correct these beam lines. The overall encircled energy requirement is more readily met by phasing of the beams in pairs but still requires high Strehl ratios, Sr, and rms tip/tilt errors of approximately one {micro}rad. To accomplish this task we have designed an interferometric adaptive optics system capable of beam pointing, high Strehl ratio and beam phasing with a single pixilated MEMS deformable mirror and interferometric wave-front sensor. We present the design of a testbed used to evaluate the performance of this wave-front sensor below along with simulations of its expected performance level.

  7. Top Ten Reasons for DEOX as a Front End to Pyroprocessing

    SciTech Connect (OSTI)

    B.R. Westphal; K.J. Bateman; S.D. Herrmann

    2007-11-01

    A front end step is being considered to augment chopping during the treatment of spent oxide fuel by pyroprocessing. The front end step, termed DEOX for its emphasis on decladding via oxidation, employs high temperatures to promote the oxidation of UO2 to U3O8 via an oxygen carrier gas. During oxidation, the spent fuel experiences a 30% increase in lattice structure volume resulting in the separation of fuel from cladding with a reduced particle size. A potential added benefit of DEOX is the removal of fission products, either via direct release from the broken fuel structure or via oxidation and volatilization by the high temperature process. Fuel element chopping is the baseline operation to prepare spent oxide fuel for an electrolytic reduction step. Typical chopping lengths range from 1 to 5 mm for both individual elements and entire assemblies. During electrolytic reduction, uranium oxide is reduced to metallic uranium via a lithium molten salt. An electrorefining step is then performed to separate a majority of the fission products from the recoverable uranium. Although DEOX is based on a low temperature oxidation cycle near 500oC, additional conditions have been tested to distinguish their effects on the process.[1] Both oxygen and air have been utilized during the oxidation portion followed by vacuum conditions to temperatures as high as 1200oC. In addition, the effects of cladding on fission product removal have also been investigated with released fuel to temperatures greater than 500oC.

  8. The Majorana low-noise low-background front-end electronics

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

    Abgrall, N.; Aguayo, E.; Avignone, III, F. T.; Barabash, A. S.; Bertrand, F. E.; Boswell, M.; Brudanin, V.; Busch, M.; Byram, D.; Caldwell, A. S.; et al

    2015-03-24

    The Majorana Demonstrator will search for the neutrinoless double beta decay (??(0?)) of the isotope ??Ge with a mixed array of enriched and natural germanium detectors. In view of the next generation of tonne-scale germanium-based ??(0?)-decay searches, a major goal of the Majorana Demonstrator is to demonstrate a path forward to achieving a background rate at or below 1 cnt/(ROI-t-y) in the 4 keV region of interest (ROI) around the 2039-keV Q-value of the ??Ge ??(0?)-decay. Such a requirement on the background level significantly constrains the design of the readout electronics, which is further driven by noise and energy resolutionmoreperformances. We present here the low-noise low-background front-end electronics developed for the low-capacitance p-type point contact (P-PC) germanium detectors of the Majorana Demonstrator. This resistive-feedback front-end, specifically designed to have low mass, is fabricated on a radioassayed fused-silica substrate where the feedback resistor consists of a sputtered thin film of high purity amorphous germanium and the feedback capacitor is based on the capacitance between gold conductive traces.less

  9. The Higgs oscillator on the hyperbolic plane and Light-Front Holography

    E-Print Network [OSTI]

    A. Pallares-Rivera; M. Kirchbach

    2014-11-19

    The Light Front Holographic (LFH) wave equation, which is the conformal scalar equation on the plane, is revisited from the perspective of the supersymmetric quantum mechanics, and attention is drawn to the fact that it naturally emerges in the small hyperbolic angle approximation to the "curved" Higgs oscillator on the hyperbolic plane, i.e. on the upper part of the two-dimensional hyperboloid of two sheets, a space of constant negative curvature. Such occurs because the particle dynamics under consideration reduces to the one dimensional Schr\\"odinger equation with the second hyperbolic P\\"oschl-Teller potential, whose flat-space (small-angle) limit reduces to the conformally invariant inverse square distance plus harmonic oscillator interaction, on which LFH is based. In consequence, energies and wave functions of the LFH spectrum can be approached by the solutions of the Higgs oscillator on the hyperbolic plane in employing its curvature and the potential strength as fitting parameters. Also the proton electric charge form factor is well reproduced within this scheme by means of a Fourier-Helgason hyperbolic wave transform of the charge density. In conclusion, in the small angle approximation, the Higgs oscillator on the hyperbolic plane is demonstrated to satisfactory parallel essential outcomes of the Light Front Holographic QCD. The findings are suggestive of associating the hyperboloid curvature of the with a second scale in LFH, which then could be employed in the definition of a chemical potential.

  10. Symmetric multivariate polynomials as a basis for three-boson light-front wave functions

    E-Print Network [OSTI]

    Sophia S. Chabysheva; Blair Elliott; John R. Hiller

    2013-07-18

    We develop a polynomial basis to be used in numerical calculations of light-front Fock-space wave functions. Such wave functions typically depend on longitudinal momentum fractions that sum to unity. For three particles, this constraint limits the two remaining independent momentum fractions to a triangle, for which the three momentum fractions act as barycentric coordinates. For three identical bosons, the wave function must be symmetric with respect to all three momentum fractions. Therefore, as a basis, we construct polynomials in two variables on a triangle that are symmetric with respect to the interchange of any two barycentric coordinates. We find that, through the fifth order, the polynomial is unique at each order, and, in general, these polynomials can be constructed from products of powers of the second and third-order polynomials. The use of such a basis is illustrated in a calculation of a light-front wave function in two-dimensional phi^4 theory; the polynomial basis performs much better than the plane-wave basis used in discrete light-cone quantization.

  11. Front-end electronics and readout system for the ILD TPC

    E-Print Network [OSTI]

    Hedberg, V; Lundberg, B; Mjrnmark, U; Oskarsson, A; sterman, L; De Lentdecker, G; Yang, Y; Zhang, F

    2015-01-01

    A high resolution TPC is the main option for a central tracking detector at the future International Linear Collider (ILC). It is planned that the MPGD (Micro Pattern Gas Detector) technology will be used for the readout. A Large Prototype TPC at DESY has been used to test the performance of MPGDs in an electron beam of energies up to 6 GeV. The first step in the technology development was to demonstrate that the MPGDs are able to achieve the necessary performance set by the goals of ILC. For this proof of principle phase, the ALTRO front-end electronics from the ALICE TPC was used, modified to adapt to MPGD readout. The proof of principle has been verified and at present further improvement of the MPGD technology is going on, using the same readout electronics. The next step is the feasibility phase, which aims at producing front-end electronics comparable in size (few mm2) to the readout pads of the TPC. This development work is based on the succeeding SALTRO16 chip, which combines the analogue ...

  12. The Majorana low-noise low-background front-end electronics

    SciTech Connect (OSTI)

    Abgrall, N. [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Aguayo, E. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Avignone, III, F. T. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of South Carolina, Columbia, SC (United States); Barabash, A. S. [Institute for Theoretical and Experiemental Physics, Moscow (Russia); Bertrand, F. E. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Boswell, M. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Brudanin, V. [Joint Institute for Nuclear Research, Durham, NC (United States); Busch, M. [Duke Univ., Durham, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States); Byram, D. [Univ. of South Dakota, Vermillion, SD (United States); Caldwell, A. S. [South Dakota School of Mines and Technology, Rapid City, SD (United States); Chan, Y. -D. [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Christofferson, C. D. [South Dakota School of Mines and Technology, Rapid City, SD (United States); Combs, D. C. [North Carolina State Univ., Raleigh, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States); Cuesta, C. [Univ. of Washington, Seattle, WA (United States); Detwiler, J. A. [Univ. of Washington, Seattle, WA (United States); Doe, P. J. [Univ. of Washington, Seattle, WA (United States); Efremenko, Yu. [Univ. of Tennessee, Knoxville, TN (United States); Egorov, V. [Joint Institute for Nuclear Research, Durham, NC (United States); Ejiri, H. [Osaka Univ., Osaka (Japan); Elliott, S. R. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Fast, J. E. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Finnerty, P. [Univ. of North Carolina, Chapel Hill, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States); Fraenkle, F. M. [Univ. of North Carolina, Chapel Hill, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States); Galindo-Uribarri, A. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Giovanetti, G. K. [Univ. of North Carolina, Chapel Hill, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States); Goett, J. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Green, M. P. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Gruszko, J. [Univ. of Washington, Seattle, WA (United States); Guiseppe, V. E. [Univ. of South Carolina, Columbia, SC (United States); Gusev, K. [Joint Institute for Nuclear Research, Durham, NC (United States); Hallin, A. L. [Univ. of Alberta, Edmonton, AB (Canada); Hazama, R. [Osaka Univ., Osaka (Japan); Hegai, A. [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); North Carolina State Univ., Raleigh, NC (United States); Henning, R. [Univ. of North Carolina, Chapel Hill, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States); Hoppe, E. W. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Howard, S. [South Dakota School of Mines and Technology, Rapid City, SD (United States); Howe, M. A. [Univ. of North Carolina, Chapel Hill, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States); Keeter, K. J. [Black Hills State Univ., Spearfish, SD (United States); Kidd, M. F. [Tennessee Tech Univ., Cookeville, TN (United States); Kochetov, O. [Joint Institute for Nuclear Research, Durham, NC (United States); Konovalov, S. I. [Institute for Theoretical and Experiemental Physics, Moscow (Russia); Kouzes, R. T. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); LaFerriere, B. D. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Leon, J. [Univ. of Washington, Seattle, WA (United States); Leviner, L. E. [North Carolina State Univ., Raleigh, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States); Loach, J. C. [Shanghai Jiao Tong Univ., Shanghai (China); MacMullin, J. [Univ. of North Carolina, Chapel Hill, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States)

    2015-01-01

    The Majorana Demonstrator will search for the neutrinoless double beta decay (??(0?)) of the isotope ??Ge with a mixed array of enriched and natural germanium detectors. In view of the next generation of tonne-scale germanium-based ??(0?)-decay searches, a major goal of the Majorana Demonstrator is to demonstrate a path forward to achieving a background rate at or below 1 cnt/(ROI-t-y) in the 4 keV region of interest (ROI) around the 2039-keV Q-value of the ??Ge ??(0?)-decay. Such a requirement on the background level significantly constrains the design of the readout electronics, which is further driven by noise and energy resolution performances. We present here the low-noise low-background front-end electronics developed for the low-capacitance p-type point contact (P-PC) germanium detectors of the Majorana Demonstrator. This resistive-feedback front-end, specifically designed to have low mass, is fabricated on a radioassayed fused-silica substrate where the feedback resistor consists of a sputtered thin film of high purity amorphous germanium and the feedback capacitor is based on the capacitance between gold conductive traces.

  13. Evaluation of a front-end ASIC for the readout of PMTs in large dynamic range

    E-Print Network [OSTI]

    Wu, Weihao; Liang, Yu; Yu, Li; Liu, Jianfeng; Liu, Shubin; An, Qi

    2015-01-01

    The Large High Altitude Air Shower Observatory (LHAASO) project has been proposed for the survey and study of cosmic rays. In the LHAASO project, the Water Cherenkov Detector Array (WCDA) is one of major detectors for searching gamma ray sources. A Charge-to-Time Convertor (QTC) ASIC (Application Specification Integrated Circuit) fabricated in Global Foundry 0.35 {\\mu}m CMOS technology, has been developed for readout of Photomultiplier Tubes (PMTs) in the WCDA. This paper focuses on the evaluation of this front-end readout ASIC performance. Test results indicate that the time resolution is better than 400 ps and the charge resolution is better than 1% with large input signals and remains better than 15% @ 1 Photo Electron (P.E.), both beyond the application requirement. Moreover, this ASIC has a weak ambient temperature dependence, low input rate dependence and high channel-to-channel isolation.

  14. Development of a transonic front stage of an axial flow compressor for industrial gas turbines

    SciTech Connect (OSTI)

    Katoh, Y.; Ishii, H.; Tsuda, Y.; Yanagida, M. . Mechanical Engineering Research Lab.); Kashiwabara, Y. . Dept. of Mechanical Systems Engineering)

    1994-10-01

    This paper describes the aerodynamic blade design of a highly loaded three-stage compressor, which is a model compressor for the front stage of an industrial gas turbine. Test results are presented that confirm design performance. Some surge and rotating stall measurement results are also discussed. The first stator blade in this test compressor operates in the high subsonic range at the inlet. To reduce the pressure loss due to blade surface shock waves, a shock-free airfoil is designed to replace the first stator blade in an NACA-65 airfoil in a three-stage compressor. Comparison of the performance of both blades shows that the shock-free airfoil blade reduces pressure loss. This paper also presents some experimental results for MCA (multicircular arc) airfoils, which are used for first rotor blades.

  15. Review of input stages used in front end electronics for particle detectors

    E-Print Network [OSTI]

    Kaplon, J

    2015-01-01

    In this paper we present noise analysis of the input stages most commonly used in front end electronics for particle detectors. Analysis shows the calculation of the input referenced noise related to the active devices. It identifies the type, parallel or series, of the equivalent noise sources related to the input transistors, which is the important input for the further choice of the signal processing method. Moreover we calculate the input impedance of amplifiers employed in applications where the particle detector is connected to readout electronics by means of transmission line. We present schematics, small signal models,a complete set of equations, and results of the major steps of calculations for all discussed circuits.

  16. The Analog Front-end Prototype Electronics Designed for LHAASO WCDA

    E-Print Network [OSTI]

    Cong Ma; Lei Zhao; Yu-Xiang Guo; Jian-Feng Liu; Shu-Bin Liu; Qi An

    2015-04-22

    In the readout electronics of the Water Cerenkov Detector Array (WCDA) in the Large High Altitude Air Shower Observatory (LHAASO) experiment, both high-resolution charge and time measurement are required over a dynamic range from 1 photoelectron (P.E.) to 4000 P.E. The Analog Front-end (AFE) circuit is one of the crucial parts in the whole readout electronics. We designed and optimized a prototype of the AFE through parameter calculation and circuit simulation, and conducted initial electronics tests on this prototype to evaluate its performance. Test results indicate that the charge resolution is better than 1% @ 4000 P.E. and remains better than 10% @ 1 P.E., and the time resolution is better than 0.5 ns RMS, which is better than application requirement.

  17. The Analog Front-end Prototype Electronics Designed for LHAASO WCDA

    E-Print Network [OSTI]

    Ma, Cong; Guo, Yu-Xiang; Liu, Jian-Feng; Liu, Shu-Bin; An, Qi

    2015-01-01

    In the readout electronics of the Water Cerenkov Detector Array (WCDA) in the Large High Altitude Air Shower Observatory (LHAASO) experiment, both high-resolution charge and time measurement are required over a dynamic range from 1 photoelectron (P.E.) to 4000 P.E. The Analog Front-end (AFE) circuit is one of the crucial parts in the whole readout electronics. We designed and optimized a prototype of the AFE through parameter calculation and circuit simulation, and conducted initial electronics tests on this prototype to evaluate its performance. Test results indicate that the charge resolution is better than 1% @ 4000 P.E. and remains better than 10% @ 1 P.E., and the time resolution is better than 0.5 ns RMS, which is better than application requirement.

  18. Hydrodynamics of phase transition fronts and the speed of sound in the plasma

    E-Print Network [OSTI]

    Leonardo Leitao; Ariel Megevand

    2015-03-06

    The growth of bubbles in cosmological first-order phase transitions involves nontrivial hydrodynamics. For that reason, the study of the propagation of phase transition fronts often requires several approximations. A frequently used approximation consists in describing the two phases as being composed only of radiation and vacuum energy (the so-called bag equation of state). We show that, in realistic models, the speed of sound in the low-temperature phase is generally smaller than that of radiation, and we study the hydrodynamics in such a situation. We find in particular that a new kind of hydrodynamical solution may be possible, which does not arise in the bag model. We obtain analytic results for the efficiency of the transfer of latent heat to bulk motions of the plasma, as a function of the speed of sound in each phase.

  19. Finite-time barriers to front propagation in two-dimensional fluid flows

    E-Print Network [OSTI]

    Mahoney, John R

    2015-01-01

    Recent theoretical and experimental investigations have demonstrated the role of certain invariant manifolds, termed burning invariant manifolds (BIMs), as one-way dynamical barriers to reaction fronts propagating within a flowing fluid. These barriers form one-dimensional curves in a two-dimensional fluid flow. In prior studies, the fluid velocity field was required to be either time-independent or time-periodic. In the present study, we develop an approach to identify prominent one-way barriers based only on fluid velocity data over a finite time interval, which may have arbitrary time-dependence. We call such a barrier a burning Lagrangian coherent structure (bLCS) in analogy to Lagrangian coherent structures (LCSs) commonly used in passive advection. Our approach is based on the variational formulation of LCSs using curves of stationary "Lagrangian shear", introduced by Farazmand, Blazevski, and Haller [Physica D 278-279, 44 (2014)] in the context of passive advection. We numerically validate our techniqu...

  20. Evaluation of a front-end ASIC for the readout of PMTs in large dynamic range

    E-Print Network [OSTI]

    Weihao Wu; Lei Zhao; Yu Liang; Li Yu; Jianfeng Liu; Shubin Liu; Qi An

    2015-02-05

    The Large High Altitude Air Shower Observatory (LHAASO) project has been proposed for the survey and study of cosmic rays. In the LHAASO project, the Water Cherenkov Detector Array (WCDA) is one of major detectors for searching gamma ray sources. A Charge-to-Time Convertor (QTC) ASIC (Application Specification Integrated Circuit) fabricated in Global Foundry 0.35 {\\mu}m CMOS technology, has been developed for readout of Photomultiplier Tubes (PMTs) in the WCDA. This paper focuses on the evaluation of this front-end readout ASIC performance. Test results indicate that the time resolution is better than 400 ps and the charge resolution is better than 1% with large input signals and remains better than 15% @ 1 Photo Electron (P.E.), both beyond the application requirement. Moreover, this ASIC has a weak ambient temperature dependence, low input rate dependence and high channel-to-channel isolation.

  1. Measures of the environmental footprint of the front end of the nuclear fuel cycle

    SciTech Connect (OSTI)

    E. Schneider; B. Carlsen; E. Tavrides; C. van der Hoeven; U. Phathanapirom

    2013-11-01

    Previous estimates of environmental impacts associated with the front end of the nuclear fuel cycle (FEFC) have focused primarily on energy consumption and CO2 emissions. Results have varied widely. This work builds upon reports from operating facilities and other primary data sources to build a database of front end environmental impacts. This work also addresses land transformation and water withdrawals associated with the processes of the FEFC. These processes include uranium extraction, conversion, enrichment, fuel fabrication, depleted uranium disposition, and transportation. To allow summing the impacts across processes, all impacts were normalized per tonne of natural uranium mined as well as per MWh(e) of electricity produced, a more conventional unit for measuring environmental impacts that facilitates comparison with other studies. This conversion was based on mass balances and process efficiencies associated with the current once-through LWR fuel cycle. Total energy input is calculated at 8.7 x 10- 3 GJ(e)/MWh(e) of electricity and 5.9 x 10- 3 GJ(t)/MWh(e) of thermal energy. It is dominated by the energy required for uranium extraction, conversion to fluoride compound for subsequent enrichment, and enrichment. An estimate of the carbon footprint is made from the direct energy consumption at 1.7 kg CO2/MWh(e). Water use is likewise dominated by requirements of uranium extraction, totaling 154 L/MWh(e). Land use is calculated at 8 x 10- 3 m2/MWh(e), over 90% of which is due to uranium extraction. Quantified impacts are limited to those resulting from activities performed within the FEFC process facilities (i.e. within the plant gates). Energy embodied in material inputs such as process chemicals and fuel cladding is identified but not explicitly quantified in this study. Inclusion of indirect energy associated with embodied energy as well as construction and decommissioning of facilities could increase the FEFC energy intensity estimate by a factor of up to 2.

  2. Cast Stone Oxidation Front Evaluation: Preliminary Results For Samples Exposed To Moist Air

    SciTech Connect (OSTI)

    Langton, C. A.; Almond, P. M.

    2013-11-26

    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 reduction capacity

  3. Review: Global Climate Change

    E-Print Network [OSTI]

    Smith, Jennifer

    2013-01-01

    introduction to global climate change, the greenhouseReview: Global Climate Change: A Primer By Orrin H PilkeyPilkey, Keith C. Global Climate Change: a primer. Durham,

  4. Apportioning Climate Change Costs

    E-Print Network [OSTI]

    Farber, Daniel A.

    2008-01-01

    Apportioning Climate Change Costs Daniel A. Farber* I. II.ON CLIMATE CHANGE FOUR QUESTIONS ABOUTof how to respond to climate change. Most public attention

  5. 906 IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 55, NO. 5, MAY 2007 RF Front-End Passive Circuit Implementation

    E-Print Network [OSTI]

    Seo, Kwang Seok

    -End Passive Circuit Implementation Including Antenna for ZigBee Applications Chan-Sei Yoo, Member, IEEE, Joong-Sung Lee Abstract--This paper presents a front-end passive circuit module for ZigBee applications using low Terms--Antenna, balun, bandpass filter, front-end pas- sive, ZigBee. I. INTRODUCTION UBIQUITOUS

  6. 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]

    Grant, Martin

    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

  7. Scroll Wave Filaments Terminate in the Back of Traveling Fronts Tamas Bansagi, Jr., Christine Palczewski, and Oliver Steinbock*

    E-Print Network [OSTI]

    Steinbock, Oliver

    Scroll Wave Filaments Terminate in the Back of Traveling Fronts Tamas Bansagi, Jr., Christine with the 1,4-cyclohexanedione Belousov-Zhabotinsky reaction demonstrate that three-dimensional scroll waves and the wave-termination of filaments are direct consequences of the system's anomalous dispersion relation

  8. Deep-Sea Research II 49 (2002) 58895909 Characteristics and variability of the inner front of the

    E-Print Network [OSTI]

    2002-01-01

    and Ocean Sciences, University of Alaska, P.O. Box 757220, Fairbanks, AK 99775-7220, USA Abstract The inner of nutrients in the lower layer on the middle shelf and the occurrence of sufficient wind and tidal energy to as structural or structure fronts (e.g., Schumacher et al., 1979; Coachman, 1986). Alternatively

  9. Comparison of Real World Emissions of Backhoes, Front-End Loaders, and Motor Graders for B20

    E-Print Network [OSTI]

    Frey, H. Christopher

    1 Comparison of Real World Emissions of Backhoes, Front-End Loaders, and Motor Graders for B20,500Words #12;2 Abstract Field data for in-use fuel consumption and emission rates were collected for 15 nonroad vehicles using a portable emission measurement system (PEMS). Each vehicle, including 5 backhoes

  10. PHYSICAL REVIEW E 90, 042404 (2014) Solidification in soft-core fluids: Disordered solids from fast solidification fronts

    E-Print Network [OSTI]

    Knobloch, Edgar

    2014-01-01

    the study of colloidal suspensions, because of our ability to observe and track individual colloids mechanism and in this regime we are able to determine the front speed via a marginal stability analysis. We in suspension with a confocal microscope [2]. In this paper we investigate the structure a

  11. Nature and distribution of the deformation front in the Luzon Arc-Chinese continental margin collision zone at Taiwan

    E-Print Network [OSTI]

    Lin, Andrew Tien-Shun

    collision zone at Taiwan Ho-Shing Yu Institute of Oceanography, National Taiwan University, Taipei, Taiwan front, distribution, nature, seismics, Taiwan Abstract Marine seismic reflection profiles from offshore SW Taiwan combined with onland geological data are used to investigate the distri- bution and nature

  12. Climate Change and Extinctions

    E-Print Network [OSTI]

    Sinervo, Barry

    2013-01-01

    Lectures presents: Climate Change and Extinctions Happening2013. He will present a climate change extinction model that

  13. Climate Change Scoping Plan

    E-Print Network [OSTI]

    Climate Change Scoping Plan a amework for change as approved Prepared by the California AirBackgroundBackgroundBackground ............................................................................................................................................................................................................................................................................................................................................................................................................ 4444 1. Climate Change Policy in California1. Climate Change Policy in California1. Climate Change Policy in California1. Climate Change Policy in California

  14. Climate Change Scoping Plan

    E-Print Network [OSTI]

    Climate Change Scoping Plan a amework for change Prepared by the California Air Resources BoardBackgroundBackgroundBackground ............................................................................................................................................................................................................................................................................................................................................................................................................ 4444 1. Climate Change Policy in California1. Climate Change Policy in California1. Climate Change Policy in California1. Climate Change Policy in California

  15. Environmental Change Institute Environmental Change Institute

    E-Print Network [OSTI]

    Oxford, University of

    Environmental Change Institute 2012/13 eci Environmental Change Institute #12;ii Environmental 06 Educating environmental leaders 08 Centre for interdisciplinary doctoral training 10 A thriving, Dumfriesshire (ECI) #12;1 The Environmental Change Institute has 21 years' experience in helping governments

  16. An Analogue Front-End ASIC Prototype Designed For PMT Signal Readout

    E-Print Network [OSTI]

    Liu, Jianfeng; Yu, Li; Liang, Yu; Qin, Jiajun; Yang, Yunfang; Wu, Weihao; Liu, Shubin; An, Qi

    2015-01-01

    The Large High Altitude Air Shower Observatory (LHAASO) is designed for high energy gamma ray and cosmic ray detection. A Water Cherenkov Detector Array which is sensitive to gamma ray showers above a few hundred GeV is proposed to survey gamma ray sources. The WCDA consists of 3600 PhotoMultiplier Tubes (PMT) which collect the Cherenkov light produced by the shower particles in water. Both high precision time and charge measurement are required over a large dynamic range from 1 photo electron (P.E.) to 4000 P.E. Prototype of an analogue front-end Application Specific Integrated Circuit (ASIC) fabricated in Chartered 0.35 {\\mu}m CMOS technology is designed to read out PMT signal in the WCDA. This ASIC employs leading edge discrimination and RC4 shaping structure; combined with the following Time-to-Digital Converter (TDC) and Analog-to-Digital Converter (ADC), both the arrival time and charge of the PMT signal can be measured. Initial test results indicate that time resolution is better than 350 ps and charge...

  17. Electromagnetic energy conversion in downstream fronts from three dimensional kinetic reconnection

    SciTech Connect (OSTI)

    Lapenta, Giovanni [Departement Wiskunde, KU Leuven, Universiteit Leuven (Belgium)] [Departement Wiskunde, KU Leuven, Universiteit Leuven (Belgium); Goldman, Martin; Newman, David [University of Colorado, Colorado 80309 (United States)] [University of Colorado, Colorado 80309 (United States); Markidis, Stefano [High Performance Computing and Visualization (HPCViz) Department, KTH Royal Institute of Technology, Stockholm (Sweden)] [High Performance Computing and Visualization (HPCViz) Department, KTH Royal Institute of Technology, Stockholm (Sweden); Divin, Andrey [Swedish Institute of Space Physics, Uppsala (Sweden)] [Swedish Institute of Space Physics, Uppsala (Sweden)

    2014-05-15

    The electromagnetic energy equation is analyzed term by term in a 3D simulation of kinetic reconnection previously reported by Vapirev et al. [J. Geophys. Res.: Space Phys. 118, 1435 (2013)]. The evolution presents the usual 2D-like topological structures caused by an initial perturbation independent of the third dimension. However, downstream of the reconnection site, where the jetting plasma encounters the yet unperturbed pre-existing plasma, a downstream front is formed and made unstable by the strong density gradient and the unfavorable local acceleration field. The energy exchange between plasma and fields is most intense at the instability, reaching several pW/m{sup 3}, alternating between load (energy going from fields to particles) and generator (energy going from particles to fields) regions. Energy exchange is instead purely that of a load at the reconnection site itself in a region focused around the x-line and elongated along the separatrix surfaces. Poynting fluxes are generated at all energy exchange regions and travel away from the reconnection site transporting an energy signal of the order of about S?10{sup ?3}W/m{sup 2}.

  18. Asymptotic freedom in the front-form Hamiltonian for quantum chromodynamics of gluons

    E-Print Network [OSTI]

    Maria Gomez-Rocha; Stanislaw D. Glazek

    2015-05-25

    Asymptotic freedom of gluons in QCD is obtained in the leading terms of their renormalized Hamiltonian in the Fock space, instead of considering virtual Green's functions or scattering amplitudes. Namely, we calculate the three-gluon interaction term in the front-form Hamiltonian for effective gluons in the Minkowski space-time using the renormalization group procedure for effective particles (RGPEP), with a new generator. The resulting three-gluon vertex is a function of the scale parameter, $s$, that has an interpretation of the size of effective gluons. The corresponding Hamiltonian running coupling constant, $g_\\lambda$, depending on the associated momentum scale $\\lambda = 1/s$, is calculated in the series expansion in powers of $g_0 = g_{\\lambda_0}$ up to the terms of third order, assuming some small value for $g_0$ at some large $\\lambda_0$. The result exhibits the same finite sensitivity to small-$x$ regularization as the one obtained in an earlier RGPEP calculation, but the new calculation is simpler than the earlier one because of a simpler generator. This result establishes a degree of universality for pure-gauge QCD in the RGPEP.

  19. Progress on the upgrade of the CMS Hadron Calorimeter Front-End electronics

    SciTech Connect (OSTI)

    Anderson, Jake; Whitmore, Juliana; /Fermilab

    2011-11-01

    We present a scheme to upgrade the CMS HCAL front-end electronics in the second long shutdown to upgrade the LHC (LS2), which is expected to occur around 2018. The HCAL electronics upgrade is required to handle the major instantaneous luminosity increase (up to 5 * 10{sup 34} cm{sup -2} s{sup -1}) and an expected integrated luminosity of {approx}3000 fb{sup -1}. A key aspect of the HCAL upgrade is to read out longitudinal segmentation information to improve background rejection, energy resolution, and electron isolation at the L1 trigger. This paper focuses on the requirements for the new electronics and on the proposed solutions. The requirements include increased channel count, additional timing capabilities, and additional redundancy. The electronics are required to operate in a harsh environment and are constrained by the existing infrastructure. The proposed solutions span from chip level to system level. They include the development of a new ASIC ADC, the design and testing of higher speed transmitters to handle the increased data volume, the evaluation and use of circuits from other developments, evaluation of commercial FPGAs, better thermal design, and improvements in the overall readout architecture. We will report on the progress of the designs for these upgraded systems, along with performance requirements and initial design studies.

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

    E-Print Network [OSTI]

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

    2000-12-06

    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.

  1. Climate change action plan

    E-Print Network [OSTI]

    Delivery Climate change action plan 2009-2011 #12;2 | Climate change action plan istockphoto.com #12;Climate Change Action Plan Climate change action plan | 3 Contents Overview 4 Preface and Introduction 5 Climate change predictions for Scotland 6 The role of forestry 7 Protecting and managing

  2. Redesign and Reconstruction of the Equipment Protection Systems for the Upgrading Front Ends and Beamlines at BSRF

    SciTech Connect (OSTI)

    Xiong Shenshou; Tan Yinglei; Wu Xuehui [Beijing Synchrotron Radiation Laboratory, Institute of High Energy Physics, P. O. Box 918, Branch 2-7, Beijing 100049 (China)

    2007-01-19

    The BEPC(Beijing Electron-Positron Collider) is upgraded to be BEPCII, a two-ring Electron-Positron collider. Due to the construction of the BEPCII and upgrade of the existing front ends and beamlines, all the existing EPSs(Equipment Protection Systems) have to be redesigned and reconstructed at BSRF. All the redesigned EPSs for the upgrading front ends and beamlines are a PLC- and SCADA-based equipment protection and control and monitoring system. The EPSs are used to protect BEPCII two storage rings vacuum against vacuum failures in a beamline, as well as to protect the front-end and beamline components from being damaged by synchrotron radiation. For the high-power wiggler beam lines, a fast movable mask is used to protect the blade of a fast-closing valve from damage when the fast-closing valve is triggered to close, which does not need to dump the electron beam running in BEPCII outer ring. In addition, all redesigned PLC- based EPSs are used to communicate with the same centralized monitoring computer to monitor a variety of parameters from all PLC- based EPS systems. The monitoring computer runs the SCADA (Supervisory Control And Data Acquisition) software with its own web server. Graphical HMI interfaces are used to display a few overall views of all front-end equipment operation status and the further detailed information for each EPS in a different pop-up window. On the web services, the SCADA-based centralized monitoring system provides a web browse function, etc. The design of the reconstructed systems is described in this paper.

  3. Paper No. 150. Ray, Najm and McCoy 1 Ignition front structure in a methane-air jet.1

    E-Print Network [OSTI]

    Ray, Jaideep

    Paper No. 150. Ray, Najm and McCoy 1 Ignition front structure in a methane-air jet.1 J.Ray2 , H. N-premixed methane jet in coflow air using the GRImech1.2 chemical mechanism. Ignition is initiated in the jet mixing is formed in the rich mixture region inside the jet and is observed to propagate towards the stoichiometric

  4. How Europe is Changing

    E-Print Network [OSTI]

    Abdolah, Kader

    2012-01-01

    20. Devil 21. Tirannie How Europe is Changing 22. Bin Ladencan swim in a pond," he How Europe is Changing I says. "Yourain falls on his hat. How Europe is Changing An Empty Grave

  5. Discrete Symmetries on the Light Front and a General Relation connecting Nucleon Electric Dipole and Anomalous Magnetic Moments

    SciTech Connect (OSTI)

    Brodsky, Stanley J.; /SLAC; Gardner, Susan; /Kentucky U.; Hwang, Dae Sung; /Sejong U.

    2006-01-11

    We consider the electric dipole form factor, F{sub 3}(q{sup 2}), as well as the Dirac and Pauli form factors, F{sub 1}(q{sup 2}) and F{sub 2}(q{sup 2}), of the nucleon in the light-front formalism. We derive an exact formula for F{sub 3}(q{sup 2}) to complement those known for F{sub 1}(q{sup 2}) and F{sub 2}(q{sup 2}). We derive the light-front representation of the discrete symmetry transformations and show that time-reversal- and parity-odd effects are captured by phases in the light-front wave functions. We thus determine that the contributions to F{sub 2}(q{sup 2}) and F{sub 3}(q{sup 2}), Fock-state by Fock-state, are related, independent of the fundamental mechanism through which CP violation is generated. Our relation is not specific to the nucleon, but, rather, is true of spin-1/2 systems in general, be they lepton or baryon. The empirical values of the anomalous magnetic moments, in concert with empirical bounds on the associated electric dipole moments, can better constrain theories of CP violation. In particular, we find that the neutron and proton electric dipole moments echo the isospin structure of the anomalous magnetic moments, {kappa}{sup n} {approx} -{kappa}{sup p}.

  6. Discrete symmetries on the light front and a general relation connecting the nucleon electric dipole and anomalous magnetic moments

    SciTech Connect (OSTI)

    Brodsky, Stanley J. [Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 (United States); Gardner, Susan [Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055 (United States); Hwang, Dae Sung [Department of Physics, Sejong University, Seoul 143-747 (Korea, Republic of)

    2006-02-01

    We consider the electric dipole form factor, F{sub 3}(q{sup 2}), as well as the Dirac and Pauli form factors, F{sub 1}(q{sup 2}) and F{sub 2}(q{sup 2}), of the nucleon in the light-front formalism. We derive an exact formula for F{sub 3}(q{sup 2}) to complement those known for F{sub 1}(q{sup 2}) and F{sub 2}(q{sup 2}). We derive the light-front representation of the discrete symmetry transformations and show that time-reversal- and parity-odd effects are captured by phases in the light-front wave functions. We thus determine that the contributions to F{sub 2}(q{sup 2}) and F{sub 3}(q{sup 2}), Fock state by Fock state, are related, independent of the fundamental mechanism through which CP violation is generated. Our relation is not specific to the nucleon, but, rather, is true of spin-1/2 systems in general, be they lepton or baryon. The empirical values of the anomalous magnetic moments, in concert with empirical bounds on the associated electric dipole moments, can better constrain theories of CP violation. In particular, we find that the neutron and proton electric dipole moments echo the isospin structure of the anomalous magnetic moments, {kappa}{sup n}{approx}-{kappa}{sup p}.

  7. Discrete Symmetries on the Light Front and a General Relation Connecting Nucleon Electric Dipole and Anomalous Magnetic Moments

    E-Print Network [OSTI]

    S. J. Brodsky; S. Gardner; D. S. Hwang

    2006-02-27

    We consider the electric dipole form factor, F_3(q^2), as well as the Dirac and Pauli form factors, F_1(q^2) and F_2(q^2), of the nucleon in the light-front formalism. We derive an exact formula for F_3(q^2) to complement those known for F_1(q^2) and F_2(q^2). We derive the light-front representation of the discrete symmetry transformations and show that time-reversal- and parity-odd effects are captured by phases in the light-front wave functions. We thus determine that the contributions to F_2(q^2) and F_3(q^2), Fock state by Fock state, are related, independent of the fundamental mechanism through which CP violation is generated. Our relation is not specific to the nucleon, but, rather, is true of spin-1/2 systems in general, be they lepton or baryon. The empirical values of the anomalous magnetic moments, in concert with empirical bounds on the associated electric dipole moments, can better constrain theories of CP violation. In particular, we find that the neutron and proton electric dipole moments echo the isospin structure of the anomalous magnetic moments, kappa^n ~ - kappa^p.

  8. Discrete Symmetries on the Light Front and a General Relation Connecting Nucleon Electric Dipole and Anomalous Magnetic Moments

    E-Print Network [OSTI]

    Brodsky, S J; Hwang, D S

    2006-01-01

    We consider the electric dipole form factor, F_3(q^2), as well as the Dirac and Pauli form factors, F_1(q^2) and F_2(q^2), of the nucleon in the light-front formalism. We derive an exact formula for F_3(q^2) to complement those known for F_1(q^2) and F_2(q^2). We derive the light-front representation of the discrete symmetry transformations and show that time-reversal- and parity-odd effects are captured by phases in the light-front wave functions. We thus determine that the contributions to F_2(q^2) and F_3(q^2), Fock-state by Fock-state, are related, independent of the fundamental mechanism through which CP violation is generated. Our relation is not specific to the nucleon, but, rather, is true of spin-1/2 systems in general, be they lepton or baryon. The empirical values of the anomalous magnetic moments, in concert with empirical bounds on the associated electric dipole moments, can better constrain theories of CP violation. In particular, we find that the neutron and proton electric dipole moments echo ...

  9. Climate change cripples forests

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

    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...

  10. Climate change cripples forests

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

    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...

  11. TRENDS in Genetics Vol.17 No.10 October 2001 http://tig.trends.com 0168-9525/01/$ see front matter 2001 Elsevier Science Ltd. All rights reserved.

    E-Print Network [OSTI]

    Bulyk, Martha L.

    TRENDS in Genetics Vol.17 No.10 October 2001 http://tig.trends.com 0168-9525/01/$ see front affinity. A phage display library of Zif 268 variants was constructed where the amino acids in finger 2

  12. October 1999 1999, Elsevier Science Inc., 1040-6190/99/$see front matter PII S1040-6190(99)00074-3 77 Transmission Rights and

    E-Print Network [OSTI]

    Kammen, Daniel M.

    October 1999 1999, Elsevier Science Inc., 1040-6190/99/$see front matter PII S1040 not necessarily reflect the views of any of the organizations listed above. H #12;78 1999, Elsevier Science Inc

  13. Microcomputer Analysis of Pumping System Performance

    E-Print Network [OSTI]

    Bierschenk, J. L.; Schmidt, P. S.

    1986-01-01

    produced by the pump for a given series computers, has been developed to permit the capacity, as well as the brake horsepower, analysis of pump operation based on descriptions efficiency, and net positive suction head. Pump of the piping system... to impeller peripheral velocity and head is proportional to the square of the peripheral velocity. Therefore. flow (Q) will vary directly with the change in speed (n). head (H) will vary as the square of the speed, and brake horsepower (BHP) will vary...

  14. Adaptive Optimization of Central Chiller Plant Equipment Sequencing

    E-Print Network [OSTI]

    Fiorino, D. P.; Priest, J. W.

    1987-01-01

    the optimal sequence of central refrigeration equipment (chillers, cooling towers, pumps) to operate in an industrial plant. The control algorithm adapts the optimal equipaent sequence to reflect changes in the plant's cooling load and outside air... primary pumps totaling 625 horsepower and two chilled water booster pumps totaling 200 horsepower. Heat rejected by the chillers' vapor-compression cycles is rejected to the atmosphere by five cooling towers totaling 4,335 tons of refrigeration...

  15. Climatic Change An Interdisciplinary,

    E-Print Network [OSTI]

    Reale, Marco

    1 23 Climatic Change An Interdisciplinary, International Journal Devoted to the Description, Causes and Implications of Climatic Change ISSN 0165-0009 Volume 107 Combined 3-4 Climatic Change (2011) 107:247-265 DOI available until 12 months after publication. #12;Climatic Change (2011) 107:247265 DOI 10.1007/s10584

  16. Climate Change and Transportation

    E-Print Network [OSTI]

    Minnesota, University of

    1 Climate Change and Transportation Addressing Climate Change in the Absence of Federal Guidelines;6 WSDOT Efforts Climate Change Team Project Level GHG Approach Planning Level GHG Approach Alternative Fuels Corridor Recent legislation and research #12;7 WSDOT Efforts: Climate Change Team

  17. Global Climate Change,Global Climate Change, Land Cover Change, andLand Cover Change, and

    E-Print Network [OSTI]

    1 Global Climate Change,Global Climate Change, Land Cover Change, andLand Cover Change, and HydrologyHydrology Steven Fassnacht Watershed Science Colorado State University The Importance of Climate Climate affects the environment and us Ecology: vegetation and animals Water Systems People

  18. Kansas Journal of Sociology, Volume 8, Number 1 (SPRING, 1972): Front Matter

    E-Print Network [OSTI]

    1972-04-01

    of Oligarchy" Jerry C. Jolley Plea Bargaining end Plea Negotiation in the Judicial System Book Reviews Denisoff and Pererson: The Sounds of Social Change Frank Southard Needham: Street Arabs and Gutter Snipes: The Pathetic and Humorous Side of Young Vagabond... of Oligarchy" Jerry C. Jolley Plea Bargaining end Plea Negotiation in the Judicial System Book Reviews Denisoff and Pererson: The Sounds of Social Change Frank Southard Needham: Street Arabs and Gutter Snipes: The Pathetic and Humorous Side of Young Vagabond...

  19. Climate Change, Adaptation, and Development

    E-Print Network [OSTI]

    Cole, Daniel H.

    2008-01-01

    Climate Change, Adaptation, and Development Daniel H. Cole*THE COSTS OF CLIMATE CHANGE . ADAPTATIONCONVENTION ON CLIMATE CHANGE . IV. A.

  20. Mid-American Review of Sociology, Volume 11, Number 1 (SPRING, 1986): Front Matter

    E-Print Network [OSTI]

    1986-04-01

    organization. This work is based on an historical analysis of organizational change in one of the largest steel manufac turing corporations in the United States. ". JOHN F. WE~SH rec~iv~9hi~~. ~h.D.".irqxp _Qkl.~~change in one of the largest steel manufac turing corporations in the United States. ". JOHN F. WE~SH rec~iv~9hi~~. ~h.D.".irqxp _Qkl.~~

  1. Uranium and its relationship to host rock mineralogy in an unoxidized roll front in the Jackson group, South Texas

    E-Print Network [OSTI]

    Prasse, Eric Martin

    1978-01-01

    Martin Prasse, B. A. , R1ce University Chairman of Advisory Comm1ttee: Dr. Hen Huang Results of fission track study of thin sect1ons of uran1um ore show that the distr1but1on of uranium on the microscopic scale in the ore is inhomogeneous, with high... of an unoxidized roll front in the Deweesville Sandstone of the Jackson Group in Karnes County, Texas. Overall, 114 ore samples and 90 overburden samples were collected and analyzed for uran1um by delayed neutron activation. Uran1um concentration varies between...

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

    SciTech Connect (OSTI)

    Aznauryan Inna, Burkert Volker

    2012-05-01

    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.

  3. Design of a New Switching Power Supply for the ATLAS TileCAL Front-End Electronics

    E-Print Network [OSTI]

    Drake, G; The ATLAS collaboration

    2012-01-01

    We present the design of an upgraded switching power supply for the front-end electronics of the ATLAS hadron tile calorimeter (TileCAL) at the LHC. The new design features significant improvement in noise, improved fault detection, and improved reliability, while retaining the compact size, water-cooling, output control, and monitoring features in this 300 KHz design. We discuss the steps taken to improve the design. We present the results from extensive radiation testing to qualify the design, including SEU sensitivity. We also present our reliability analysis. Production of 2400 new bricks for the detector is currently in progress, and we present preliminary results from the production checkout.

  4. Design of a New Switching Power Supply for the ATLAS TileCal Front-End Electronics

    E-Print Network [OSTI]

    Drake, Gary; The ATLAS collaboration

    2012-01-01

    We present the design of an upgraded switching power supply for the front-end electronics of the ATLAS Hadron Tile Calorimeter. The new design features significant improvement in noise, improved fault detection, and improved reliability, while retaining the compact size, water-cooling, output control, and monitoring features. We discuss the steps taken to improve the design. We present the results from extensive radiation testing to qualify the design, including SEU sensitivity. We also present our reliability analysis. Production of 2400 new bricks for the detector is in progress, and we present preliminary results from the production checkout.

  5. An Upgraded Front-End Switching Power Supply Design for the ATLAS TileCAL Detector of the LHC

    E-Print Network [OSTI]

    Drake, G; The ATLAS collaboration; De Lurgio, P; Henriques, A; Minashvili, I; Nemecek, S; Price, L; Proudfoot, J; Stanek, R

    2011-01-01

    We present the design of an upgraded switching power supply brick for the front-end electronics of the ATLAS hadron tile calorimeter (TileCAL) at the LHC. The new design features significant improvement in noise, improved fault detection, and generally a more robust design, while retaining the compact size, water-cooling, output control, and monitoring features in this 300 KHz design. We discuss the improvements to the design, and the radiation testing that we have done to qualify the design. We also present our plans for the production of 2400 new bricks for installation on the detector in 2013.

  6. Change in historic buildings

    E-Print Network [OSTI]

    Yin, Chien-Ni

    1992-01-01

    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 ...

  7. "Managing Department Climate Change"

    E-Print Network [OSTI]

    Sheridan, Jennifer

    "Managing Department Climate Change" #12;Presenters Ronda Callister Professor, Department Department Climate? Assesment is essential for determining strategies for initiating change In a research climate Each panelist will describe an intervention designed to improve department climate Ronda

  8. Front propagation and pattern formation in anisotropic bistable media Markus Bar,1,2,

    E-Print Network [OSTI]

    Hagberg, Aric

    - ferent uniform states are common spatial structures. The simplest catalytic system is CO oxidation on Pt in catalytic CO oxidation on platinum sur- faces that undergo structural changes due to adsorbate- induced liquid crystals 1 , catalytic surface reactions 2 , and cardiac tissue 35 . It is responsible

  9. Infrastructure Institutional Change Principle

    Broader source: Energy.gov [DOE]

    Research shows that changes in infrastructure prompt changes in behavior (for better or worse). Federal agencies can modify their infrastructure to promote sustainability-oriented behavior change, ideally in ways that make new behaviors easier and more desirable to follow than existing patterns of behavior.

  10. CLIMATE CHANGE AND BIODIVERSITY

    E-Print Network [OSTI]

    CLIMATE CHANGE AND BIODIVERSITY THE CONTRIBUTION OF THE NATIONAL MUSEUM OF NATURAL HISTORY #12;At, the origin of which is mainly related to human activities. For the first time climate change sends a strong of climate change and that will fully find material expression in the debates. What will the world we shape

  11. CLIMATE CHANGE & THE GREENHOUSE

    E-Print Network [OSTI]

    Tobar, Michael

    CLIMATE CHANGE & THE GREENHOUSE EFFECT #12;This development of these materials was supported under.nasa.gov/Features/BlueMarble/BlueMarble_history.php 2014 University of Western Australia ISBN 978-0-646-93241-5 Title: Climate change and the greenhouse OF CONTENTS TABLE OF CONTENTS Introduction to climate change resources 5 Alternative conceptions 6 References

  12. Forest Research: Climate Change

    E-Print Network [OSTI]

    Forest Research: Climate Change projects Forest Research is part of the Forestry Commission of climate change-related research is wide-ranging, covering impact assessment and monitoring, adaptation around a quarter of its research budget with Forest Research on climate change and related programmes

  13. Geography 131 Environmental Change

    E-Print Network [OSTI]

    the present landscape of the earth reflects past environmental conditions. We will then look at the impact Environmental Changes in the late Holocene 6 9 The Impact of People and Natural Environmental Changes in the late Holocene 7-8 10 TEST 2 - Thurs 8th The Impact of People and Natural Environmental Changes

  14. Climate change vulnerability

    E-Print Network [OSTI]

    Hilderbrand, Robert H.

    Climate change vulnerability assessment of the Verde Island Passage, Philippines #12;ii This document should be cited as: R. Boquiren, G. Di Carlo, and M.C. Quibilan (Eds). 2010. Climate Change, Marine Climate Change Program Conservation InternationalGlobal Marine Division epidgeon

  15. Environment and Climate Change

    E-Print Network [OSTI]

    Galles, David

    Migration, Environment and Climate Change: ASSESSING THE EVIDENCE #12;The opinions expressed;Migration, Environment and Climate Change: ASSESSING THE EVIDENCE Edited by Frank Laczko and Christine with with the financial support of #12;3 Migration, Environment and Climate Change: Assessing the Evidence Contents

  16. Climate Change Workshop 2007

    E-Print Network [OSTI]

    Nebraska-Lincoln, University of

    1 Climate Change Workshop 2007 Adaptive Management and Resilience Relevant for the Platte River, UNL Climate Change Workshop 2007 Resilience Why it matters Adaptive Management How it helps Adaptive Capacity What it is Overview Climate Change Workshop 2007 "A public Domain, once a velvet carpet

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

    SciTech Connect (OSTI)

    1980-02-01

    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)

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

    SciTech Connect (OSTI)

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

    2012-06-01

    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.

  19. Single Event Effect Hardness for the Front-end ASICs Applied in BGO Calorimeter of DAMPE Satellite

    E-Print Network [OSTI]

    Gao, Shan-Shan; Feng, Chang-Qing; Xi, Kai; Liu, Shu-Bin; An, Qi

    2015-01-01

    Dark Matter Particle Explorer (DAMPE) is a Chinese scientific satellite designed for cosmic ray study with a primary scientific goal of indirect search of dark matter particles. As a crucial sub-detector, BGO calorimeter measures the energy spectrum of cosmic rays in the energy range from 5 GeV to 10 TeV. In order to implement high-density front-end electronics (FEE) with the ability to measure 1848 signals from 616 photomultiplier tubes on the strictly constrained satellite platform, two kinds of 32-channel front-end ASICs, VA160 and VATA160, are customized. However, a space mission period of more than 3 years makes single event effect (SEE) a probable threat to reliability. In order to evaluate the SEE sensitivity of the chips and verify the effectiveness of mitigation methods, a series of laser-induced and heavy ion-induced SEE tests were performed. Benefiting from the single event latch-up (SEL) protection circuit for power supply, the triple module redundancy (TMR) technology for the configuration regist...

  20. Climate Change, Drought & Environment

    Broader source: Energy.gov [DOE]

    Afternoon Plenary Session: Current Trends in the Advanced Bioindustry Climate Change, Drought, and EnvironmentMichael Champ, Executive Director, The Sustainable Water Challenge

  1. Change Control Management Guide

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2011-07-29

    The Guide provides a suggested approach and uniform guidance for managing project and contract changes through applying the requirements of DOE O 413.3B. No cancellation.

  2. Climate Change Webinar Series

    Broader source: Energy.gov [DOE]

    Experts will provide findings from the Quadrennial Energy Review (QER) and outline federal energy policy objectives, proposals, and actions as they relate to climate change and resilience for...

  3. Climate change risk and response

    E-Print Network [OSTI]

    Kahrl, Fredrich; Roland-Holst, David

    2008-01-01

    and Kate Scow. 2006. Climate Change: Page 117 ChallengesLandscapes. California Climate Change Center White Paper.Sea Level. California Climate Change Center White Paper.

  4. Climate Change and National Security

    E-Print Network [OSTI]

    Alyson, Fleming; Summer, Kelly; Summer, Martin; Lauren, Franck; Jonathan, Mark

    2015-01-01

    CLIMATE CHANGE Multiplying Threats to National Securityfor the impacts of climate change on national security. Pagea warming world. Page 11 Climate change acts as a threat

  5. Climate change risk and response

    E-Print Network [OSTI]

    Kahrl, Fredrich; Roland-Holst, David

    2008-01-01

    The Potential Impacts of Climate Change on Inshore Squid:Fifth Annual California Climate Change Research Conference,Potential Impacts of Climate Change on U.S. Transportation.

  6. Review: Preparing for Climate Change

    E-Print Network [OSTI]

    Kunnas, Jan

    2013-01-01

    Review: Preparing for Climate Change By Michael D.Stephen, Preparing for Climate Change. A Boston Review Book.alkaline paper. Climate change is inevitable, but disaster

  7. Urban Growth and Climate Change

    E-Print Network [OSTI]

    Kahn, Matthew E.

    2008-01-01

    2007a The Economic Impacts of Climate Change: Evidence fromGreenstone. 2007b. Climate Change, Mortality and Adaptation:and Ariel Dinar, 1999, Climate Change, Agriculture, and

  8. Direct numerical simulations of fluid flow, heat transfer and phase changes

    SciTech Connect (OSTI)

    Juric, D.; Tryggvason, G.; Han, J.

    1997-04-01

    Direct numerical simulations of fluid flow, heat transfer, and phase changes are presented. The simulations are made possible by a recently developed finite difference/front tracking method based on the one-field formulation of the governing equations where a single set of conservation equations is written for all the phases involved. The conservation equations are solved on a fixed rectangular grid, but the phase boundaries are kept sharp by tracking them explicitly by a moving grid of lower dimension. The method is discussed and applications to boiling heat transfer and the solidification of drops colliding with a wall are shown.

  9. Commitment Institutional Change Principle

    Broader source: Energy.gov [DOE]

    Commitment can be a crucial element that helps federal agencies inject and emphasize sustainability in their organizational culture. Institutions and people change when they have made definite commitments to change, especially when those commitments relate to future conditions. Research shows that explicit commitments improve the rate at which people adopt energy-efficient behaviors.

  10. Global Change at Edinburgh

    E-Print Network [OSTI]

    Greenaway, Alan

    at Edinburgh | 2 The Global Change Group Human impacts on our planet are changing the atmosphere, climate, ice and to the CarboEurope programme. Cryosphere: field & remote observations & experiments on glacial erosion Biodiversity and the carbon cycle in Peru 10 Radiation penetration in forest stands 12 Genetics and Past

  11. Generalized parton distributions and transverse densities in a light-front quark-diquark model for the nucleons

    E-Print Network [OSTI]

    Chandan Mondal; Dipankar Chakrabarti

    2015-06-17

    We present a study of the generalized parton distributions for the quarks in a proton in both momentum and position spaces using the light-front wave functions of a quark-diquark model for the nucleon predicted by the soft-wall model of AdS/QCD. The results are compared with the soft-wall AdS/QCD model of proton GPDs for zero skewness. We also calculate the GPDs for nonzero skewness. We observe that the GPDs have a diffraction pattern in longitudinal position space, as seen before in other models. Then we present a comparitive study of the nucleon charge and anomalous magnetization densities in the transverse plane. Flavor decompositions of the form factors and transverse densities are also discussed.

  12. Isoperimetric inequalities for wave fronts and a generalization of Menzin's conjecture for bicycle monodromy on surfaces of constant curvature

    E-Print Network [OSTI]

    Howe, Sean; Zakharevich, Valentin

    2009-01-01

    We prove generalizations of the isoperimetric inequality for both spherical and hyperbolic wave fronts (i.e. piecewise smooth curves which may have cusps). We then discuss "bicycle curves" using the generalized isoperimetric inequalities. The euclidean model of a bicycle is a unit segment AB that can move so that it remains tangent to the trajectory of point A (the rear wheel is fixed on the bicycle frame). We extend this definition to a general Riemannian manifold, and concern ourselves in particular with bicycle curves in the hyperbolic plane H^2 and on the sphere S^2. We prove results along the lines of those proven by Levi and Tabachnikov and resolve both spherical and hyperbolic versions of Menzin's conjecture, which relates the area bounded by a curve to its associated monodromy map.

  13. Climate Change and National Security

    E-Print Network [OSTI]

    Alyson, Fleming; Summer, Kelly; Summer, Martin; Lauren, Franck; Jonathan, Mark

    2015-01-01

    data needed to construct effective climate change models and forecasts. Academic Centers of Excellence that focus on climate change

  14. Quarterly Journal of the Royal Meteorological Society Q. J. R. Meteorol. Soc. 136: 962977, April 2010 Part B Evolution and structure of a cold front in an Alpine valley as

    E-Print Network [OSTI]

    Gohm, Alexander

    is a Doppler lidar that had been operated in the Wipp Valley (Austria). The cold front approached the European part of the cold air had entered the adjacent northsouth aligned Wipp Valley. Asynthesisof in the Wipp Valley was an atmospheric density current characterized by an elevated head, a front

  15. Front, left to right: Mark Handy, Tuncay Taymaz, Jean-Pierre Brun, Walter Mooney. Back, left to right: Patience Cowie, Christian Teyssier, Alain Vauchez, Kevin Furlong,

    E-Print Network [OSTI]

    Cowie, Patience

    Front, left to right: Mark Handy, Tuncay Taymaz, Jean-Pierre Brun, Walter Mooney. Back, left transitions occur? Identifying these basic questions is straightforward, but answering them is prob- lematic area in back- ground shows the large range of conditions for faulting, from nucleation and localiza

  16. Dynamical evolution of Rayleigh-Taylor and Richtmyer-Meshkov mixing fronts Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545

    E-Print Network [OSTI]

    New York at Stoney Brook, State University of

    derive § an analytic solution for the dynamic evolution of mixing fronts driven by constant acceleration in a multifluid system produce buoyancy and shear driven 8 instabilities at an interface between distinct fluids 9 Rayleigh-T ¨ aylor ©RT ¨ and impulsive acceleration Richtmyer-Meshkov instabilities, from a simple physics

  17. 0045-2068/$ -see front matter 2004 Elsevier Inc. All rights reserved. doi:10.1016/j.bioorg.2004.04.002

    E-Print Network [OSTI]

    Theodorakis, Emmanuel

    0045-2068/$ - see front matter 2004 Elsevier Inc. All rights reserved. doi:10.1016/j.bioorg.2004.04.002 Bioorganic Chemistry 32 (2004) 274289 www.elsevier.com/locate/bioorg Hydrophilic molecular rotor derivatives 22 March 2004 Available online 13 May 2004 Abstract Recent research shows high potential for some p

  18. ABSTRACT: FRANKEL K.L. & PAZZAGLIA F.J., Tectonic geomorpholo-gy, drainage basin metrics, and active mountain fronts. (IT ISSN 1724-

    E-Print Network [OSTI]

    Frankel, Kurt L.

    and deformational style in the western United States and Italy. Our study is guided by initial results obtained from United States. We attribute the higher variance to the effects of overall larger drainage basin size settings. Here we report results from test cases on five mountain fronts with variable rates of rock uplift

  19. Local waiting time fluctuations along a randomly pinned crack front Knut Jrgen Maly, 1 Stephane Santucci, 1 Jean Schmittbuhl, 2 and Renaud Toussaint 2

    E-Print Network [OSTI]

    Toussaint, Renaud

    that the fracture front dynamics is governed by local and irregular avalanches with very large size and velocity) # S -# with # = 1.70.1. Above a characteristic length scale of disorder Ld # 15m, the avalanche clusters become], magnetic domain walls [12], or wet ting contact lines [13--15], where elasticity and disorder compete

  20. Sedimentation in theTonga forearc is dominated by the redeposition of volcaniclastic sediment from the arc volcanic front by mass flows

    E-Print Network [OSTI]

    Clift, Peter

    ABSTRACT Sedimentation in theTonga forearc is dominated by the redeposition of volcaniclastic sediment from the arc volcanic front by mass flows and turbidity currents onto the adjacent Tonga Platform, the shallow- est, flattest part of the forearc region.The greatest sediment thicknesses accumulate in debris

  1. Mechanisms for plasma and reactive ion etch-front roughening Jason T. Drotar, Y.-P. Zhao, T.-M. Lu, and G.-C. Wang

    E-Print Network [OSTI]

    Wang, Gwo-Ching

    width w induced by SF6 plasma etching of silicon surfaces increases linearly with etch time (w t1Mechanisms for plasma and reactive ion etch-front roughening Jason T. Drotar, Y.-P. Zhao, T.-M. Lu, Troy, New York 12180-3590 Received 14 April 1999; revised manuscript received 1 September 1999 Through

  2. Climate Change Proposed Scoping Plan

    E-Print Network [OSTI]

    Climate Change Proposed Scoping Plan a amework for change Prepared by the California Air ResourcesBackgroundBackgroundBackground ............................................................................................................................................................................................................................................................................................................................................................................................................ 4444 1. Climate Change Policy in California1. Climate Change Policy in California1. Climate Change Policy in California1. Climate Change Policy in California

  3. Oversight and Change

    National Nuclear Security Administration (NNSA)

    %2A en Oversight and Change http:www.nnsa.energy.govourmissionoversightandchange

    Page...

  4. Managing Internal Administrative Change

    E-Print Network [OSTI]

    Custer, Joseph A.

    2000-01-01

    Mr. Custer considers the impact of already instituted internal administrative change on library staff and how best to deal with it. He approaches the topic by describing what his own library did when faced with significant internal administrative...

  5. Climate Change Adaptation

    Broader source: Energy.gov [DOE]

    DOE is adapting to climate change by applying a risk-based resiliency approach to identify and minimize climate-related vulnerabilities across all DOE policies, programs and activities.

  6. Climate Change Adaptation Planning

    Office of Energy Efficiency and Renewable Energy (EERE)

    This course provides an introduction to planning for climate change impacts, with examples of tribes that have been going through the adaptation planning process. The course is intended for tribal...

  7. Configuration Change Management

    E-Print Network [OSTI]

    Yoder, Nathaniel

    2012-05-11

    shown that if a company does not continue to innovate, whether it is products or services, it will not be able to remain successful. This philosophy is extremely important with design engineering companies. If managed correctly, change can be a...

  8. Sample Changes and Issues

    Annual Energy Outlook [U.S. Energy Information Administration (EIA)]

    EIA-914 Survey and HPDI. Figure 2 shows how this could change apparent production. The blue line shows the reported sample production as it would normally be reported under the...

  9. Determine Institutional Change Sustainability Goals | Department...

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

    Institutional Change Determine Institutional Change Sustainability Goals Determine Institutional Change Sustainability Goals Institutional Change Continuous Improvement Cycle...

  10. Institutional Change for Sustainability Contacts | Department...

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

    Institutional Change Institutional Change for Sustainability Contacts Institutional Change for Sustainability Contacts For more information about institutional change for...

  11. Climate ChangeClimate Change and Runoff Managementand Runoff Management

    E-Print Network [OSTI]

    Sheridan, Jennifer

    Climate ChangeClimate Change and Runoff Managementand Runoff Management in Wisconsinin Wisconsin NASECA February 3, 2011 David S. Liebl #12;Overview Understanding climate change Wisconsin's changing Vegetation indicators #12;Indicators of a changing climate J. Magnuson Source: IPCC 2007 Potter, et al

  12. Climate Change Review of Muller's chapter on Climate Change from

    E-Print Network [OSTI]

    Browder, Tom

    Climate Change Review of Muller's chapter on Climate Change from Physics for Future Society) controversy on climate change (e.g. resignation of Hal Lewis, Ivar Giaever and other notable. #12;Some climate changes basics IPCC = Intergovernmental Panel on Climate Change The IPCC

  13. Multilayer network modeling of change propagation for engineering change management

    E-Print Network [OSTI]

    Pasqual, Michael C

    2010-01-01

    Engineering change management is a critical and challenging process within product development. One pervasive source of difficulty for this process is the phenomenon of change propagation, by which a change to one part or ...

  14. Climate Change Economics and Policy

    E-Print Network [OSTI]

    Romano, Daniela

    AFRICA COLLEGE Centre for Climate Change Economics and Policy Adapting to Climate Change 3 CLIMATE...Furthermore, there is strong scientific evidence that climate change will disrupt the global economy, environment and society a growing population in a changing climate is, therefore, a major global challenge. Changes in climate

  15. Status of Climate Change

    E-Print Network [OSTI]

    North, G.

    2013-01-01

    stream_source_info ESL-KT-13-12-56.pdf.txt stream_content_type text/plain stream_size 3413 Content-Encoding UTF-8 stream_name ESL-KT-13-12-56.pdf.txt Content-Type text/plain; charset=UTF-8 Status of Climate Change 2013... CaTee Conference San Antonio 2013 ESL-KT-13-12-56 CATEE 2013: Clean Air Through Energy Efficiency Conference, San Antonio, Texas Dec. 16-18 Menu for Today IPCC 2013: Assessment Report #5 Facts about Climate Change Who will Win, Who will Lose...

  16. Generation of short gamma-ray pulses on electron bunches formed in intense interfering laser beams with tilted fronts

    SciTech Connect (OSTI)

    Korobkin, V V; Romanovskiy, M Yu; Trofimov, V A; Shiryaev, O B

    2014-05-30

    It is shown that in the interference of multiple laser pulses with a relativistic intensity, phase and amplitude fronts of which are tilted at an angle with respect to their wave vector, effective traps of charged particles, which are moving at the velocity of light, are formed. Such traps are capable of capturing and accelerating the electrons produced in the ionisation of low-density gas by means of laser radiation. The accelerated electrons in the traps form a bunch, whose dimensions in all directions are much smaller than the laser radiation wavelength. Calculations show that the energy of accelerated electrons may amount to several hundred GeV at experimentally accessible relativistic laser intensities. As a result of the inverse Compton scattering, gamma-quanta with a high energy and narrow radiation pattern are emitted when these electrons interact with a laser pulse propagating from the opposite direction. The duration of emitted gamma-ray pulses constitutes a few attoseconds. The simulation is performed by solving the relativistic equation of motion for an electron with a relevant Lorentz force. (interaction of radiation with matter)

  17. Design of a Modular Multilevel Converter as an Active Front-End for a magnet supply application

    E-Print Network [OSTI]

    Panagiotis, Asimakopoulos; Massimo, Bongiorno

    2015-01-01

    The aim of this work is to describe the general design procedure of a Modular Multilevel Converter (MMC) applied as an Active Front-End (AFE) for a magnet supply for beam accelerators. The dimensioning criteria for the converter and the dc-link capacitance are presented and the grid transformer requirements are set. Considering the converter design, the arm inductance calculation is based on the specifications for the arm-current ripple and the DC-link fault tolerance, but, also, on the limitation of the second harmonic and the second-order LC resonance of the arm current. The module capacitance value is evaluated by focusing on the required switching dynamics and the capacitor-voltage ripple according to a newly proposed graphical method. The loading of each semiconductor in the half bridge is calculated via simulation, indicating the unsymmetrical current distribution. It is concluded that the current distribution for each semiconductor depends on the mode of operation of the converter. The different criter...

  18. The bound state corrections to the semileptonic decays of the B meson. The light-front approach versus ACM model

    E-Print Network [OSTI]

    I. L. Grach; P. Yu. Kulikov; I. M. Narodetskii

    2001-05-21

    A generalization of the parton-like formula is used for the first time to find the differential distributions in the inclusive semileptonic weak decays of the B meson. The main features of this new approach are the treatment of the b-quark as an on-mass-shell particle and the inclusion of the effects arising from the b-quark transverse motion in the B-meson. Using the b-quark light-front (LF) distribution function related to the equal time momentum wave function taken from the ACM model we compute the electron energy spectra and the total semileptonic widths of the B meson. We find an impressive agreement between the electron energy spectra calculated in the LF approach and the ones obtained in the ACM model, provided the b quark mass is identified with the average of the floating b quark mass in the ACM model. In spite of the simplicity of the model we obtain a fair good description of the CLEO data for V_{cb}=0.042.

  19. Non-filamentated ultra-intense and ultra-short pulse fronts in three-dimensional Raman seed amplification

    SciTech Connect (OSTI)

    Lehmann, G.; Spatschek, K. H.

    2014-05-15

    Ultra-intense and ultra-short laser pulses may be generated up to the exawatt-zetawatt regime due to parametric processes in plasmas. The minimization of unwanted plasma processes leads to operational limits which are discussed here with respect to filamentation. Transverse filamentation, which originally was derived for plane waves, is being investigated for seed pulse propagation in the so called ?-pulse limit. A three-dimensional (3D) three-wave-interaction model is the basis of the present investigation. To demonstrate the applicability of the three-wave-interaction model, the 1D pulse forms are compared with those obtained from 1D particle in cell and Vlasov simulations. Although wave-breaking may occur, the kinetic simulations show that the leading pumped pulse develops a form similar to that obtained from the three-wave-interaction model. In the main part, 2D and 3D filamentation processes of (localized) pulses are investigated with the three-wave-interaction model. It is shown that the leading pulse front can stay filamentation-free, whereas the rear parts show transverse modulations.

  20. Global Change Sustainability

    E-Print Network [OSTI]

    Tipple, Brett

    Global Change and Sustainability Center The GCSC is an inclusionary and interdisciplinary hub that promotes, coordinates, and conducts local to global environmental- and sustainability-related research to complex environmental and sustainability issues and challenges. 2012 Annual Report #12;1GCSC 2012 ANNUAL

  1. Leadership Institutional Change Principle

    Broader source: Energy.gov [DOE]

    For changing behavior among employees, leaders in Federal agencies should visibly communicate their own commitments to sustainability in the workplace. Such visible leadership will help achieve sustainability goals in the short term and continue to provide motivation for long-term benefits.

  2. Connecticut Why Change?

    E-Print Network [OSTI]

    Chandy, John A.

    The New Connecticut PR-1 Why Change? Why Now? Connecticut's PR-1 was last updated in 1995. Over.D. Associate Research Professor Director, Connecticut Transportation Safety Research Center Connecticut Transportation Institute University of Connecticut 270 Middle Turnpike, Unit 5202 Storrs, CT 06269 860-486-8426 e

  3. Phase change compositions

    DOE Patents [OSTI]

    Salyer, Ival O. (Dayton, OH); Griffen, Charles W. (Mason, OH)

    1986-01-01

    Compositions containing crystalline, long chain, alkyl hydrocarbons as phase change materials including cementitious compositions containing the alkyl hydrocarbons neat or in pellets or granules formed by incorporating the alkyl hydrocarbons in polymers or rubbers; and polymeric or elastomeric compositions containing alkyl hydrocarbons.

  4. Phase change compositions

    DOE Patents [OSTI]

    Salyer, Ival O. (Dayton, OH)

    1989-01-01

    Compositions containing crystalline, straight chain, alkyl hydrocarbons as phase change materials including cementitious compositions containing the alkyl hydrocarbons neat or in pellets or granules formed by incorporating the alkyl hydrocarbons in polymers or rubbers; and polymeric or elastomeric compositions containing alkyl hydrocarbons.

  5. ENERGY FLOWS CLIMATE CHANGE

    E-Print Network [OSTI]

    Schwartz, Stephen E.

    ENERGY FLOWS FORCINGS CLIMATE CHANGE A REALLY TOUGH PROBLEM Stephen E. Schwartz, BNL, 7-20-11 www average temperature 15°C or 59°F #12;ATMOSPHERIC RADIATION Power per area Energy per time per area Unit" temperature to radiative flux. #12;GLOBAL ENERGY BALANCE Global and annual average energy fluxes in watts per

  6. ETHICAL DILEMMAS IN CLIMATE CHANGE

    E-Print Network [OSTI]

    Chauve, Cedric

    ETHICAL DILEMMAS IN CLIMATE CHANGE RECOMMENDATIONS FOR CANADIAN CLIMATE POLICY Roundtable Dialogue AND SELECTED THE FOLLOWING CLIMATE CHANGE POLICY AREAS FOR DETAILED DISCUSSION. PARTICIPANTS THEN WORKED Dilemmas in Climate Change roundtable dialogue, convened by Simon Fraser University's Centre for Dialogue

  7. Climate Change and National Security

    E-Print Network [OSTI]

    Alyson, Fleming; Summer, Kelly; Summer, Martin; Lauren, Franck; Jonathan, Mark

    2015-01-01

    for the impacts of climate change on national security. Pagea warming world. Page 11 Climate change acts as a threatand the Threat of Climate Change, The CNA Corporation, 2007

  8. Farming: A Climate Change Culprit

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

    Farming: A Climate Change Culprit Farming: A Climate Change Culprit Simulations run at NERSC show impact of land-use change on African monsoon precipitation June 7, 2014 | Tags:...

  9. book review: Climate change mapped

    E-Print Network [OSTI]

    Shanahan, Mike

    2012-01-01

    ofmillions 2 . Climatechangeisamovingtargetandintroductions to climatechange,theAtlasstandsoutmediareportingonclimatechange. CambridgeUniversity

  10. Climate Change at Annual Timescales

    E-Print Network [OSTI]

    Stine, Alexander Robin

    2010-01-01

    carbon cycling to global climate change, Nature, 393 (6682),2005. Meehl, G. , et al. , Climate Change 2007: The PhysicalIntergovernmental Panel on Climate Change, chap. 10. Global

  11. MAPPING CLIMATE CHANGE EXPOSURES, VULNERABILITIES,

    E-Print Network [OSTI]

    MAPPING CLIMATE CHANGE EXPOSURES, VULNERABILITIES, AND ADAPTATION TO PUBLIC HEALTH RISKS's California Climate Change Center JULY 2012 CEC5002012041 Prepared for: California Energy Commission of California. #12; ii ABSTRACT This study reviewed first available frameworks for climate change adaptation

  12. International Finance and Climate Change

    E-Print Network [OSTI]

    Zhang, Junshan

    International Finance and Climate Change Thursday, October 17, 2013 Breakfast 8:30 a Principal Climate Change Specialist, Climate Business Group at International Finance Corporation, World Bank Group Vladimir Stenek Senior Climate Change Specialist, Climate Business Department of the International

  13. Strategies for Achieving Institutional Change

    Broader source: Energy.gov [DOE]

    Many strategiesincluding those derived from Institutional Change Principlesmay be used to effect institutional change in support of energy and sustainability objectives.

  14. Climate change risk and response

    E-Print Network [OSTI]

    Kahrl, Fredrich; Roland-Holst, David

    2008-01-01

    the Potential Consequences of Climate Variability and Changeand Kate Scow. 2006. Climate Change: Page 117 ChallengesLandscapes. California Climate Change Center White Paper.

  15. Climate change risk and response

    E-Print Network [OSTI]

    Kahrl, Fredrich; Roland-Holst, David

    2008-01-01

    Climate Change and Electricity Demand: Applying the NewClimate Change and Electricity Demand in California. Extreme Heat, and Electricity Demand in California.

  16. CHANGE PROCESS MODELLING USING THE EKD-CHANGE MANAGEMENT METHOD

    E-Print Network [OSTI]

    Boyer, Edmond

    CHANGE PROCESS MODELLING USING THE EKD-CHANGE MANAGEMENT METHOD S. Nurcan* , J. Barrios*1 , G The Enterprise Knowledge Development - Change Management Method (EKD-CMM) provides a systematic way to organise and to guide the organisational change management. The EKD-CMM road map, implemented in the electronic guide

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

    E-Print Network [OSTI]

    Madero-Farias, Alma Alida

    2000-01-01

    ), for providing me resources, information, and her valuable time. Special thanks to my field teammates Gabriela Ortiz Maciel, Jose Luis Manzano Loza, Romualdo Martinez, and Ruben Marroquin, from ITESM-CCA-PMSE, for helping me gather my data. Ruben's deep... of 2000, accompanied by 4 colleagues from the Maroon-fronted Parrot project (Gabriela Ortiz, Romualdo Martinez, Ruben Marroquin, and Jose Luis Manzano). Many of the interviewees had previously met members of the parrot project, who had been more active...

  18. Measurements of the ablation-front trajectory and low-mode nonuniformity in direct-drive implosions using x-ray self-emission shadowgraphy

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

    Michel, D. T.; Davis, A. K.; Armstrong, W.; Bahr, R.; Epstein, R.; Goncharov, V. N.; Hohenberger, M.; Igumenshchev, I. V.; Jungquist, R.; Meyerhofer, D. D.; et al

    2015-07-08

    Self-emission x-ray shadowgraphy provides a method to measure the ablation-front trajectory and low-mode nonuniformity of a target imploded by directly illuminating a fusion capsule with laser beams. The technique uses time-resolved images of soft x-rays (>1 keV) emitted from the coronal plasma of the target imaged onto an x-ray framing camera to determine the position of the ablation front. Methods used to accurately measure the ablation-front radius (${\\it\\delta}R=\\pm 1.15~{\\rm\\mu}\\text{m}$), image-to-image timing (${\\it\\delta}({\\rm\\Delta}t)=\\pm 2.5$ps) and absolute timing (${\\it\\delta}t=\\pm 10$ps) are presented. Angular averaging of the images provides an average radius measurement ofmorehref='S2095471915000158_inline5' mime-subtype='gif' type='simple'/>${\\it\\delta}(R_{\\text{av}})=\\pm 0.15~{\\rm\\mu}\\text{m}$and an error in velocity of${\\it\\delta}V/V=\\pm 3\\%$. This technique was applied on the Omega Laser Facility and the National Ignition Facility.less

  19. THE PROJECT-X INJECTOR EXPERIMENT: A NOVEL HIGH PERFORMANCE FRONT-END FOR A FUTURE HIGH POWER PROTON FACILITY AT FERMILAB

    SciTech Connect (OSTI)

    Nagaitsev, S.; et al,

    2013-09-25

    A multi-MW proton facility, Project X, has been proposed and is currently under development at Fermilab. We are carrying out a program of research and development aimed at integrated systems testing of critical components comprising the front end of Project X. This program, known as the Project X Injector Experiment (PXIE), is being undertaken as a key component of the larger Project X R&D program. The successful completion of this program will validate the concept for the Project X front end, thereby minimizing a primary technical risk element within Project X. PXIE is currently under construction at Fermilab and will be completed over the period FY12-17. PXIE will include an H* ion source, a CW 2.1-MeV RFQ and two superconductive RF (SRF) cryomodules providing up to 25 MeV energy gain at an average beam current of 1 mA (upgradable to 2 mA). Successful systems testing will also demonstrate the viability of novel front end technologies that are expected find applications beyond Project X.

  20. Conservation and Global Climate Change

    E-Print Network [OSTI]

    Landweber, Laura

    V.6 Conservation and Global Climate Change Diane M. Debinski and Molly S. Cross OUTLINE 1. Introduction 2. How climate is changing 3. Environmental responses to climate change 4. Consequences of climate the coming decades will be preserving biodiversity in the face of climate change. It has become increasingly

  1. Potential Impacts of CLIMATE CHANGE

    E-Print Network [OSTI]

    Sheridan, Jennifer

    Potential Impacts of CLIMATE CHANGE on U.S. Transportation Potential Impacts of CLIMATE CHANGE on U.S. Transportation TRANSPORTATION RESEARCH BOARD SPECIAL REPORT 290 #12;#12;Committee on Climate Change and U Washington, D.C. 2008 www.TRB.org Potential Impacts of CLIMATE CHANGE on U.S. Transportation TRANSPORTATION

  2. Abrupt Climate Change Inevitable Surprises

    E-Print Network [OSTI]

    Abrupt Climate Change Inevitable Surprises Committee on Abrupt Climate Change Ocean Studies Board of Congress Cataloging-in-Publication Data Abrupt climate change : inevitable surprises / Committee on Abrupt Climate Change, Ocean Studies Board, Polar Research Board, Board on Atmospheric Sciences and Climate

  3. Climate Change Proposed Scoping Plan

    E-Print Network [OSTI]

    Climate Change Proposed Scoping Plan a amework for change Prepared by the California Air Resources #12;CLIMATE CHANGE SCOPING PLAN State of California Air Resources Board Resolution 08-47 December 11 greenhouse gas (GHG) emissions that cause global warming; WHEREAS, the adverse impacts of climate change

  4. http://tics.trends.com 1364-6613/01/$ see front matter 2001 Elsevier Science Ltd. All rights reserved. PII: 82 ReviewReview TRENDS in Cognitive Sciences Vol.5 No.2 February 2001

    E-Print Network [OSTI]

    Chater, Nick

    http://tics.trends.com 1364-6613/01/$ see front matter 2001 Elsevier Science Ltd. All rights reserved. PII: 82 ReviewReview TRENDS in Cognitive Sciences Vol.5 No.2 February 2001 http://tics

  5. TRENDS in Cognitive Sciences Vol.5 No.8 August 2001 http://tics.trends.com 1364-6613/01/$ see front matter 2001 Elsevier Science Ltd. All rights reserved. PII

    E-Print Network [OSTI]

    Coulson, Seana

    TRENDS in Cognitive Sciences Vol.5 No.8 August 2001 http://tics.trends.com 1364-6613/01/$ see front matter 2001 Elsevier Science Ltd. All rights reserved. PII: 349ReviewReview http://tics

  6. http://tics.trends.com 1364-6613/01/$ see front matter 2001 Elsevier Science Ltd. All rights reserved. PII: 62 ReviewReview TRENDS in Cognitive Sciences Vol.5 No.2 February 2001

    E-Print Network [OSTI]

    Menzel, Randolf - Institut fr Biologie

    http://tics.trends.com 1364-6613/01/$ see front matter 2001 Elsevier Science Ltd. All rights reserved. PII: 62 ReviewReview TRENDS in Cognitive Sciences Vol.5 No.2 February 2001 http://tics

  7. parking permit application - front

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher i n c i p a l De p u t y A s s i s t a n t S e c r e t a r y J u l i o F

  8. New Vision front

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterested Parties -DepartmentAvailable for PublicDepartment ofNewNew TribalDepartment

  9. cover front.qxd

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann Jackson About1996HowFOAShowingFuelWeatherize »EvePlantEnergyinspection reportCleanup

  10. Progress through change

    SciTech Connect (OSTI)

    2006-11-15

    Merger, acquisitions and name changes - it happens in Germany as well. RAG has been undertaking some streamlining that has already impacted mining equipment and materials supply. It acquired the utilities firm E.ON's holding in Degussa on 1 July 2006. It is uncertain whether RAG may opt to sell DBT, one of the world's leading suppliers of underground mining equipment. DBT itself is undergoing some streamlining having sold DBT Maschinenfabrik Scharf and its subsidiaries to the Aurelius Group. The MAN TAKRAF Group has been sold to TAKRAAF Holding GmbH. These and other recent developments amongst Germany's mining equipment manufacturers suppliers are reported. 2 photos.

  11. Climate change cripples forests

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D BGene NetworkNuclearDNP 20082 P r o j e c t DClimate Change

  12. Climate change cripples forests

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D BGene NetworkNuclearDNP 20082 P r o j e c t DClimate ChangeClimate

  13. Irradiance or luminosity changes?

    E-Print Network [OSTI]

    Sabatino Sofia; Linghuai H. Li

    2000-10-20

    Whereas a variation of the solar luminosity, L, will inevitably cause a similar change of the total solar irradiance, S, the opposite is not true. In fact, the bulk of the days to months variations of S can be explained entirely in terms of the passage of active regions across the solar disk. In this case, L remains essentially unchanged. For the total irradiance variation observed over the solar cycle, the issue is more uncertain. One view explains this modulation primarily as a combined action of active regions and magnetic network. These components would be superposed to an otherwise unchanging photosphere. the other view suggests that the activity cycle modulation of S is primarily produced by a variation of L (both in terms of R and T_{eff}) caused by structural reajustments of the interior of the Sun induced by a changing magnetic field. We will present evidence in support of this second interpretation, and a model for it. We will also present the S variations over the last 5 centuries implied by our model.

  14. Institutional Change Basics for Sustainability | Department of...

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

    Institutional Change Basics for Sustainability Institutional Change Basics for Sustainability Institutional change integrates technology, policy, and behavior to make new...

  15. Resources on Institutional Change for Sustainability | Department...

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

    Institutional Change Resources on Institutional Change for Sustainability Resources on Institutional Change for Sustainability The Federal Energy Management Program (FEMP)...

  16. Forest cover changes in the Oregon Coast Range from 1939 to 1993

    E-Print Network [OSTI]

    : rebecca.kennedy@oregonstate.edu (Rebecca S.H. Kennedy). 0378-1127/$ see front matter # 2004 Elsevier B

  17. Cool with Change: Young People and Family Change

    E-Print Network [OSTI]

    Highet, Gill; Jamieson, Lynn

    Cool with Change breaks new grounds by combining in-depth research of young peoples experience of family change in Scotland, reflection by service providers on the implications for their services and consultation with ...

  18. Climate Change: Conflict, Security and Vulnerability Professor of Climate Change

    E-Print Network [OSTI]

    Hulme, Mike

    Climate Change: Conflict, Security and Vulnerability Mike Hulme Professor of Climate Change Science, Society and Sustainability Group School of Environmental Sciences Rethinking Climate Change, Conflict and Security University of Sussex, 18-19 October 2012 1 #12;Weather and climate ... vulnerability and security

  19. Climate Systems and Climate Change Is Climate Change Real?

    E-Print Network [OSTI]

    Pan, Feifei

    Chapter 10 Climate Systems and Climate Change #12;Is Climate Change Real? 1980 1898 2005 2003 #12;Arctic Sea Ice Changes #12;Observed Global Surface Air Temperature #12;! Current climate: weather station data, remote sensing data, numerical modeling using General Circulation Models (GCM) ! Past climate

  20. Massachusetts Takes On Climate Change

    E-Print Network [OSTI]

    Kimmell, Ken; Laurie, Burt

    2009-01-01

    to promote new technologies to fight climate change as theON CLIMATE CHANGE dard is a market-based, technology-neutraland technologies. 9. Facilities will calculate emissions using The Climate

  1. Migration and Global Environmental Change

    E-Print Network [OSTI]

    Migration and Global Environmental Change Future Challenges and Opportunities FINAL PROJECT REPORT and adaptation, and also developmental and humanitarian agendas. Migration and Global Environmental Change Future Environmental Change (2011) Final Project Report The Government Office for Science, London #12;3 A range

  2. Climate change & street trees project

    E-Print Network [OSTI]

    Climate change & street trees project Social Research Report The social and cultural values Group as part of the Climate change and street trees project, funded by the Forestry Commission with changing socio-economics and/or demographics, but little evidence exists relating

  3. CLIMATE RISK AND CLIMATE CHANGE

    E-Print Network [OSTI]

    Smerdon, Jason E.

    CLIMATE RISK AND CLIMATE CHANGE Scenarios of what the climate will be like 50 to 100 years from now associated with climate change demand these efforts continue. However, the long time horizons have led many decision makers to regard climate change as a problem of the distant future. But is it? I n many regions

  4. CLIMATE CHANGE A RISK ASSESSMENT

    E-Print Network [OSTI]

    Cambridge, University of

    CLIMATE CHANGE A RISK ASSESSMENT David King, Daniel Schrag, Zhou Dadi, Qi Ye and Arunabha Ghosh/JAROS, and U.S./JapanASTER Science Team. China National Expert Committee on Climate Change Hosts of the project for Climate Change, and was formerly the UK Government's Chief Scientific Adviser. He has authored over 500

  5. 4, 28752899, 2007 Climate change

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    HESSD 4, 28752899, 2007 Climate change impact and model inaccuracy P. Droogers et al. Title Page are under open-access review for the journal Hydrology and Earth System Sciences Climate change impact2899, 2007 Climate change impact and model inaccuracy P. Droogers et al. Title Page Abstract Introduction

  6. Understanding and Attributing Climate Change

    E-Print Network [OSTI]

    Box, Jason E.

    9 Understanding and Attributing Climate Change Coordinating Lead Authors: Gabriele C. Hegerl (USA. Nicholls, J.E. Penner and P.A. Stott, 2007: Under- standing and Attributing Climate Change. In: Climate of the Intergovernmental Panel on Climate Change [Solomon, S., D. Qin, M. Manning, Z. Chen, M. Marquis, K.B. Averyt, M

  7. Biological Impacts of Climate Change

    E-Print Network [OSTI]

    McCarty, John P.

    Biological Impacts of Climate Change John P McCarty, University of Nebraska at Omaha, Omaha, NE and reproduction depend on how well adapted individuals are to local climate patterns. Climate change can disrupt subsequent impacts on populations or species' distributions across geographic regions. Climate change may

  8. Climate Change Action Plan Report

    E-Print Network [OSTI]

    Hansen, Andrew J.

    Climate Change Action Plan Report Intermountain Region 2013 National Park Service Resource Stewardship and Science Landscape Conservation and Climate Change Division #12;About this Report Each National Park Service is responding to the challenge of climate change; and (2) raise awareness among NPS

  9. CLIMATE CHANGE IMPACTS, VULNERABILITIES, AND

    E-Print Network [OSTI]

    CLIMATE CHANGE IMPACTS, VULNERABILITIES, AND ADAPTATION IN THE SAN FRANCISCO BAY AREA Commission's California Climate Change Center JULY 2012 CEC5002012071 Prepared for: California Energy, as well as projections of future changes in climate based on modeling studies using various plausible

  10. Climate Change and Runoff Management

    E-Print Network [OSTI]

    Sheridan, Jennifer

    Climate Change and Runoff Management in Wisconsin Fox-Wolf Watershed Alliance May 10, 2011 David S of Engineering #12;Overview Understanding climate change Wisconsin's changing climate Expected impacts Adaptation strategies #12;What is climate? "Climate is properly the long average of weather in a single place

  11. Measurements of the ablation-front trajectory and low-mode nonuniformity in direct-drive implosions using x-ray self-emission shadowgraphy

    SciTech Connect (OSTI)

    Michel, D. T.; Davis, A. K.; Armstrong, W.; Bahr, R.; Epstein, R.; Goncharov, V. N.; Hohenberger, M.; Igumenshchev, I. V.; Jungquist, R.; Meyerhofer, D. D.; Radha, P. B.; Sangster, T. C.; Sorce, C.; Froula, D. H.

    2015-07-08

    Self-emission x-ray shadowgraphy provides a method to measure the ablation-front trajectory and low-mode nonuniformity of a target imploded by directly illuminating a fusion capsule with laser beams. The technique uses time-resolved images of soft x-rays (>1 keV) emitted from the coronal plasma of the target imaged onto an x-ray framing camera to determine the position of the ablation front. Methods used to accurately measure the ablation-front radius (${\\it\\delta}R=\\pm 1.15~{\\rm\\mu}\\text{m}$), image-to-image timing (${\\it\\delta}({\\rm\\Delta}t)=\\pm 2.5$ps) and absolute timing (${\\it\\delta}t=\\pm 10$ps) are presented. Angular averaging of the images provides an average radius measurement of${\\it\\delta}(R_{\\text{av}})=\\pm 0.15~{\\rm\\mu}\\text{m}$and an error in velocity of${\\it\\delta}V/V=\\pm 3\\%$. This technique was applied on the Omega Laser Facility and the National Ignition Facility.

  12. Breadboard Testing of a Phase Conjugate Engine with an Interferometric Wave-Front Sensor and a MEMS-Based Spatial Light Modulator

    SciTech Connect (OSTI)

    Tucker, J; Olsen, J; Minden, M L; Gavel, D; Baker, K L; Stappaerts, E A; Wilks, S C; Silva, D A; Olivier, S S; Young, P E; Kartz, M W; Flath, L M; Azucena, O

    2003-12-08

    Laboratory breadboard results of a high-speed adaptive optics system are presented. The wave-front sensor for the adaptive optics system is based on a quadrature interferometer, which directly measures the turbulence induced phase aberrations. The laboratory experiments were conducted using Kolmogorov phase screens to simulate atmospheric phase distortions with the characterization of these plates presented below. The spatial light modulator used in the phase conjugate engine was a MEMS-based piston-only correction device with 1024 actuators. The overall system achieved correction speeds in excess of 800 hz and Strehl ratios greater than 0.5 with the Kolmogorov phase screens.

  13. Tribal Climate Change Webinars: BIA's Climate Change Competitive...

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

    climate adaptation, ocean and coastal planning, and youth internships. SpeakersSean Hart, BIA Climate Change Coordinator, andRachael Novak, BIA Climate Science Coordinator,...

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

    SciTech Connect (OSTI)

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

    2012-04-15

    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.

  15. LARGE-SCALE CORONAL PROPAGATING FRONTS IN SOLAR ERUPTIONS AS OBSERVED BY THE ATMOSPHERIC IMAGING ASSEMBLY ON BOARD THE SOLAR DYNAMICS OBSERVATORYAN ENSEMBLE STUDY

    SciTech Connect (OSTI)

    Nitta, Nariaki V.; Schrijver, Carolus J.; Title, Alan M.; Liu, Wei

    2013-10-10

    This paper presents a study of a large sample of global disturbances in the solar corona with characteristic propagating fronts as intensity enhancement, similar to the phenomena that have often been referred to as Extreme Ultraviolet Imaging Telescope (EIT) waves or extreme-ultraviolet (EUV) waves. Now EUV images obtained by the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory provide a significantly improved view of these large-scale coronal propagating fronts (LCPFs). Between 2010 April and 2013 January, a total of 171 LCPFs have been identified through visual inspection of AIA images in the 193 channel. Here we focus on the 138 LCPFs that are seen to propagate across the solar disk, first studying how they are associated with flares, coronal mass ejections (CMEs), and type II radio bursts. We measure the speed of the LCPF in various directions until it is clearly altered by active regions or coronal holes. The highest speed is extracted for each LCPF. It is often considerably higher than EIT waves. We do not find a pattern where faster LCPFs decelerate and slow LCPFs accelerate. Furthermore, the speeds are not strongly correlated with the flare intensity or CME magnitude, nor do they show an association with type II bursts. We do not find a good correlation either between the speeds of LCPFs and CMEs in a subset of 86 LCPFs observed by one or both of the Solar and Terrestrial Relations Observatory spacecraft as limb events.

  16. Climate Change, Adaptation, and Development

    E-Print Network [OSTI]

    Cole, Daniel H.

    2008-01-01

    climate change is coal gasification, which can make thethe world leaders in coal gasification tech- nology, haswill not occur. If not coal gasification, then perhaps fuel

  17. Climate Change, Adaptation, and Development

    E-Print Network [OSTI]

    Cole, Daniel H.

    2008-01-01

    climate change is coal gasification, which can make theworld leaders in coal gasification tech- nology, has beenexperimenting with "in situ" gasification, where the coal is

  18. Floods, Droughts, and Climate Change

    E-Print Network [OSTI]

    Hook, Robert D.

    2003-01-01

    Review: Floods, Droughts, and Climate Change By MichaelCollier, & Robert H. Webb. Floods, Droughts, and Climateinformation about what floods and droughts can do. One photo

  19. Climate change risk and response

    E-Print Network [OSTI]

    Kahrl, Fredrich; Roland-Holst, David

    2008-01-01

    Potential Changes in Hydropower Production from Globalon high elevation hydropower generation in Californias7 reduction in the states hydropower resources, which last

  20. Climate Change and Open Science

    E-Print Network [OSTI]

    Ian Percival

    2013-08-26

    Obtaining reliable answers to the major scientific questions raised by climate change in time to take appropriate action gives added urgency to the open access program.

  1. Climate Change and Open Science

    E-Print Network [OSTI]

    Percival, Ian

    2013-01-01

    Obtaining reliable answers to the major scientific questions raised by climate change in time to take appropriate action gives added urgency to the open access program.

  2. Climate Change/Paleoclimate & Geochronology

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

    Climate ChangePaleoclimate & Geochronology "The instrumental record is generally considered not to be long enough to give a complete picture of climate variability... It is...

  3. Changes in Dimethyl Sulfide Oceanic Distribution due to Climate Change

    SciTech Connect (OSTI)

    Cameron-Smith, P; Elliott, S; Maltrud, M; Erickson, D; Wingenter, O

    2011-02-16

    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.

  4. Climate Change and National Security

    SciTech Connect (OSTI)

    Malone, Elizabeth L.

    2013-02-01

    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 proven useful to the national security community sponsors in several ways. It has opened security discussions to consider climate as well as political factors in studies of the future. It has encouraged factoring in the stresses placed on societies by climate changes (of any kind) to help assess the potential for state stability. And it has shown that, changes such as increased heat, more intense storms, longer periods without rain, and earlier spring onset call for building climate resilience as part of building stability. For the climate change research community, studies from a national security point of view have revealed research lacunae, for example, such as the lack of usable migration studies. This has also pushed the research community to consider second- and third-order impacts of climate change, such as migration and state stability, which broadens discussion of future impacts beyond temperature increases, severe storms, and sea level rise; and affirms the importance of governance in responding to these changes. The increasing emphasis in climate change science toward research in vulnerability, resilience, and adaptation also frames what the intelligence and defense communities need to know, including where there are dependencies and weaknesses that may allow climate change impacts to result in security threats and where social and economic interventions can prevent climate change impacts and other stressors from resulting in social and political instability or collapse.

  5. Global Environmental Change and Human Security

    E-Print Network [OSTI]

    Kunnas, Jan

    2011-01-01

    impacts and responses to environmental change making it anhuman security or environmental change if the lecturer isReview: Global Environmental Change and Human Security By

  6. CONFIGURATION CHANGE PROPOSAL FORM | Department of Energy

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

    CONFIGURATION CHANGE PROPOSAL FORM CONFIGURATION CHANGE PROPOSAL FORM This form is used for sharing information on Domain Name Server (DNS) changes, new requirements, modifications...

  7. Modeling Engineering Change Management Process in Virtual

    E-Print Network [OSTI]

    Akgunduz, Ali

    Modeling Engineering Change Management Process in Virtual Collaborative Design Environments Change Management - surveys and reviews - industrial case studies - tools & solutions (scarce) - change

  8. Institutional Change for Sustainability Case Studies | Department...

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

    Institutional Change for Sustainability Case Studies Institutional Change for Sustainability Case Studies These case studies show examples of institutional change successfully...

  9. Climate Change Science Institute | Clean Energy | ORNL

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

  10. Social Empowerment Institutional Change Principle

    Broader source: Energy.gov [DOE]

    By creating a context in which workers feel empowered to take action, Federal agencies can promote behaviors and behavior changes that support their sustainability goals. When individuals and organizations believe they can reach desirable social goals, they often doas is shown in research studies of change.

  11. Determine Institutional Change Sustainability Goals

    Broader source: Energy.gov [DOE]

    The first step in the institutional change process is defining your federal agency's sustainability goals. That is, decide what outcomes are desired (or required) over what period of time. Behavioral, organizational, and institutional changes typically are means to achieve desired energy, resource, or greenhouse gas emission outcomes. They are not ends in and of themselves.

  12. Climate Change in Chris Brierley

    E-Print Network [OSTI]

    Jones, Peter JS

    Climate Change in HadCM3 Chris Brierley Chapa Club - 21/06/06 #12;Increase in CO2 A climate forcing References Climate Change SRES Scenarios - T. C. Johns, J. M. Gregory,W. J. Ingram, C. E. Johnson, A. Jones

  13. Climate change: Flawed science, or

    E-Print Network [OSTI]

    Climate change: Fraud, Flawed science, or Fundamental dilemma? Prof Roy Thompson, FRSE #12;Fraud innovation Dilemma... Vicious Circle #12;1. Climate Change - Weather vs. climate - The greenhouse effect - Past climates 2. Impacts - Plants & animals - The seasons 3. Fundamental dilemma - Overpopulation

  14. Climate Change and Place Roundtable Discussion

    E-Print Network [OSTI]

    2008-01-01

    of Urban Development and Climate Change, 2007. The fullThink about what runaway climate change would mean where youWorld Changing Seattle, WA Climate change is global in scale

  15. UK Climate Change Risk Assessment and National

    E-Print Network [OSTI]

    Wirosoetisno, Djoko

    UK Climate Change Risk Assessment and National Adaptation Programme Meg Patel Defra #12;Legislative Framework Climate Change Act 2008 Adaptation Reporting Power 2011 Climate Change Risk Assessment: Climate Change Risk Assessment Elevensectors(forinitial analysis) Health Energy Transport Built

  16. Development of the front end test stand and vessel for extraction and source plasma analyses negative hydrogen ion sources at the Rutherford Appleton Laboratory

    SciTech Connect (OSTI)

    Lawrie, S. R.; Faircloth, D. C.; Letchford, A. P.; Perkins, M.; Whitehead, M. O.; Wood, T.; Gabor, C.; Back, J.

    2014-02-15

    The ISIS pulsed spallation neutron and muon facility at the Rutherford Appleton Laboratory (RAL) in the UK uses a Penning surface plasma negative hydrogen ion source. Upgrade options for the ISIS accelerator system demand a higher current, lower emittance beam with longer pulse lengths from the injector. The Front End Test Stand is being constructed at RAL to meet the upgrade requirements using a modified ISIS ion source. A new 10% duty cycle 25 kV pulsed extraction power supply has been commissioned and the first meter of 3 MeV radio frequency quadrupole has been delivered. Simultaneously, a Vessel for Extraction and Source Plasma Analyses is under construction in a new laboratory at RAL. The detailed measurements of the plasma and extracted beam characteristics will allow a radical overhaul of the transport optics, potentially yielding a simpler source configuration with greater output and lifetime.

  17. PIA - Human Resources - Personal Information Change Request ...

    Energy Savers [EERE]

    Human Resources - Personal Information Change Request - Idaho National Engineering Laboratory PIA - Human Resources - Personal Information Change Request - Idaho National...

  18. PIA - Human Resources - Personal Information Change Request ...

    Energy Savers [EERE]

    - Personal Information Change Request - Idaho National Engineering Laboratory PIA - Human Resources - Personal Information Change Request - Idaho National Engineering Laboratory...

  19. Incorporating Behavior Change Efforts Into Energy Efficiency...

    Energy Savers [EERE]

    Change Efforts Into Energy Efficiency Programs Incorporating Behavior Change Efforts Into Energy Efficiency Programs Better Buildings Residential Network Program Sustainability...

  20. Organisational Change -Key Steps LocalCollege/

    E-Print Network [OSTI]

    Botea, Adi

    Resources Division START Version 1.0 X:\\Employment Strategies\\Workplace Change & Innovation\\Change Management Frameworks\\Change Management - Key Steps 021111.vsd FINISH NOTES: * For information on formal vs informal change refer to the managing change clause in the ANU Enterprise Agreement and the managing change policy

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

    SciTech Connect (OSTI)

    1980-10-01

    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)

  2. Multiple Motivations Institutional Change Principle

    Broader source: Energy.gov [DOE]

    The multiple motivations principle suggests that a portfolio approachrather than a single strategymay be required to achieve change. Research demonstrates that people and institutions adopt new...

  3. Management of change lessons learned

    SciTech Connect (OSTI)

    Jakubowski, J.A. [Upjohn Co., Kalamazoo, MI (United States)

    1996-08-01

    This paper will describe the development of a computer program that was written to assist production units meet the requirements of the management of chance (MOC) section under the OSHA Process Safety Management (PSM) Standard, 29 CFR 1910.119 (1). Areas that will be addressed include: the development of a MOC written policy, pilot testing of change control management procedures, training of operational and maintenance personnel to follow these procedures and final implementation of established chance control measures. Practical {open_quotes}lessons learned{close_quotes} will be reviewed and a description of the use of an Access{sup {trademark}}program that was written to enhance daily MOC equipment and process changes will be highlighted. This program was designed to expedite the required PSM review of changes and to simultaneously trigger an update of related change documentation such as piping and instrumentation diagrams, equipment files, regulatory permits, and unit operating procedures.

  4. Climate Change and National Security

    E-Print Network [OSTI]

    Alyson, Fleming; Summer, Kelly; Summer, Martin; Lauren, Franck; Jonathan, Mark

    2015-01-01

    Pew Project on National Security, Energy and Climate http://of climate change, energy security and economic stability.DoD is improving U.S. energy security and national security.

  5. Audience Categorization and Behavior Change

    Broader source: Energy.gov [DOE]

    This sheet from the U.S. Department of Energy Better Buildings Neighborhood Program is a tool to use for audience brainstorm and categorization, and assessing desired behavior change.

  6. Nature Climate Change features Los

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

  7. Climate Change and Urban Trees

    E-Print Network [OSTI]

    Brown, Sally

    Climate Change and Urban Trees: effects on disease and insect pests Drew C. Zwart, Ph.D. Bartlett Other climate related impacts on plant health: Elevated atmospheric CO2 (no real question about

  8. TRENDS in Plant Science Vol.6 No.4 April 2001 http://plants.trends.com 1360-1385/01/$ see front matter 2001 Elsevier Science Ltd. All rights reserved. PII: S1360-1385(01)01891-X

    E-Print Network [OSTI]

    Nebenfhr, Andreas

    TRENDS in Plant Science Vol.6 No.4 April 2001 http://plants.trends.com 1360-1385/01/$ see front, are unique to plants. Several genes encoding Golgi biosynthetic enzymes have been cloned from plants in recent years (Box 1) and this list can be expected to grow rapidly as analysis of the Arabidopsis genome

  9. Global Climate Change and Agriculture

    SciTech Connect (OSTI)

    Izaurralde, Roberto C.

    2009-01-01

    The Fourth Assessment Report of the Intergovernmental Panel on Climate Change released in 2007 significantly increased our confidence about the role that humans play in forcing climate change. There is now a high degree of confidence that the (a) current atmospheric concentrations of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) far exceed those of the pre-industrial era, (b) global increases in CO2 arise mainly from fossil fuel use and land use change while those of CH4 and N2O originate primarily from agricultural activities, and (c) the net effect of human activities since 1750 has led to a warming of the lower layers of the atmosphere, with an increased radiative forcing of 1.6 W m-2. Depending on the scenario of human population growth and global development, mean global temperatures could rise between 1.8 and 4.0 C by the end of the 21st century.

  10. Global change monitoring with lichens

    SciTech Connect (OSTI)

    Insarov, G.

    1997-12-31

    Environmental monitoring involves observations and assessment of changes in ecosystems and their components caused by anthropogenetic influence. An ideal monitoring system enables quantification of the contemporary state of the environment and detect changes in it. An important function of monitoring is to assess environment quality of areas that are not affected by local anthropogenic impacts, i.e. background areas. In background areas terrestrial ecosystems are mainly affected by such anthropogenic factors as lowered air pollution and global climate change. Assessment of biotic responses to altered climatic and atmospheric conditions provides an important basis for ecosystem management and environmental decision making. Without the ability to make such assessment, sustainability of ecosystems as a support system for humans remains uncertain.

  11. CLIMATE CHANGE AND INTERNATIONAL PEACE AND SECURITY

    E-Print Network [OSTI]

    CLIMATE CHANGE AND INTERNATIONAL PEACE AND SECURITY: Possible Roles for the U.N. Security Council in Addressing Climate Change By Dane Warren July 2015 #12; 2015 Sabin Center for Climate Change Law, Columbia Law School The Sabin Center for Climate Change Law develops legal techniques to fight climate change

  12. CLIMATE CHANGE: Past, Present and Future: Introduction

    E-Print Network [OSTI]

    Allan, Richard P.

    CLIMATE CHANGE: Past, Present and Future: Introduction Richard Allan, Department of Meteorology r.p.allan@reading.ac.uk #12;Text Books and References Henson, B., Rough Guide to Climate Change http://www.amazon.co.uk/Climate-Change-Guides-Reference- Titles/dp/1858281059 Intergovernmental Panel on Climate Change (IPCC), Climate Change 2007, www

  13. Global change: Acronyms and abbreviations

    SciTech Connect (OSTI)

    Woodard, C.T.; Stoss, F.W.

    1995-05-01

    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.

  14. Climate Change: The Sun's Role

    E-Print Network [OSTI]

    Gerald E. Marsh

    2007-06-23

    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.

  15. Bringing climate change down to earth : science and participation in Canadian and Australian climate change campaigns

    E-Print Network [OSTI]

    Padolsky, Miriam Elana

    2006-01-01

    Scientific Uncertainty about Global Climate Change. PublicConservation Foundation. 2005a. Climate Change: A Matter ofFoundation. 2005b. Climate Change > Actions 2005 [cited 10

  16. Risk Analysis for Water Resources Under Climate Change, Population Growth, and Land Use Change

    E-Print Network [OSTI]

    Kiparsky, Michael

    2010-01-01

    Vulnerability from climate change acid population growth."2004). "Emissions pathways, climate change, and impacts onthe Intergovernmental Panel on Climate Change (IPCC). J. J.

  17. Bringing climate change down to earth : science and participation in Canadian and Australian climate change campaigns

    E-Print Network [OSTI]

    Padolsky, Miriam Elana

    2006-01-01

    about Global Climate Change. Public Understanding of ScienceFoundation. 2005a. Climate Change: A Matter of SurvivalFoundation. 2005b. Climate Change > Actions 2005 [cited 10

  18. Group of Microbes Change Dissolved

    E-Print Network [OSTI]

    Lovley, Derek

    is found in all water, even seawater, the use of these microbes to harvest gold does not make economic microbes are able to change dissolved gold into a more metallic form, using them to harvest gold isn't likely to be cost-effective. Photography by Araldo de Luca/CORBIS Ten years ago Derek Lovley

  19. Quick-change filter cartridge

    DOE Patents [OSTI]

    Rodgers, John C. (Santa Fe, NM); McFarland, Andrew R. (College Station, TX); Ortiz, Carlos A. (Bryan, TX)

    1995-01-01

    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.

  20. Electric Vehicles Global Climate Change

    E-Print Network [OSTI]

    Sbester, Andrs

    . This applies both to gas extracted bythe petrochemical industries and to the methane which is naturallyreleased, and methane naturallyleaking from the seabed, could in future be detected using changes in acoustic signals from the seabed." Natural leaks of methane gas can be damaging to the environment because

  1. Climatic Change An Interdisciplinary, International

    E-Print Network [OSTI]

    Ashkenazy, Yossi "Yosef"

    +Business Media B.V. 2011 Abstract Vegetation cover on sand dunes mainly depends on wind power (drift potential of stabilized dunes in the world, and changes in their mobility have significant economic implications. Global maps of DP are introduced, based on real and reanalysis data. Analyses of two global circulation models

  2. Climate Change Impacts on Fish and Wildlife

    Broader source: Energy.gov [DOE]

    The Earths climate is changing. In some places such as the Arctic, the change is rapid and profound, while in other areas change has been less dramatic and more gradual. But virtually everywhere,...

  3. Transtheoretical Model of Change with couples

    E-Print Network [OSTI]

    Schneider, William Joel

    2004-09-30

    The Transtheoretical Model of Change is intended to be a general model of change that can be applied to many populations and domains of change. However, most of the studies that have investigated this model have focused ...

  4. ATNI Tribal Leaders Summit on Climate Change

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Affiliated Tribes of Northwest Indians is hosting the Tribal Leaders Summit on Climate Change. This two-day conference will discuss climate change impacts, policy on climate change, tribal...

  5. Oceans and Human Health (and climate change)

    E-Print Network [OSTI]

    Zhou, Xianghong Jasmine

    Oceans and Human Health (and climate change) Tracy K. Collier Science Dimensions and Ocean Health in a Changing Climate, USC March 12, 2013 1 #12 use Climate change Closes the loop in understanding connections between ocean health and human health

  6. ATNI Tribal Leaders Summit on Climate Change

    Broader source: Energy.gov [DOE]

    The Affiliated Tribes of Northwest Indians is hosting the Tribal Leaders Summit on Climate Change. This two-day conference will discuss climate change impacts, policy on climate change, tribal needs, funding opportunities, and more.

  7. Climate Change: High Water Impacts and Adaptation

    E-Print Network [OSTI]

    Sheridan, Jennifer

    Climate Change: High Water Impacts and Adaptation David S. Liebl and Kenneth W. Potter Co of global climate change WICCI Stormwater Working Group #12;Projected Climate Change 200-2100 What Global

  8. Review: What We Know about Climate Change

    E-Print Network [OSTI]

    Tennant, Matthew Aaron

    2009-01-01

    about anthropogenic climate change and how to positivelyWhat We Know About Climate Change By Kerry Emanuel ReviewedKerry. What We Know about Climate Change. Cambridge, MA: The

  9. Too Much Riding on Climate Change?

    E-Print Network [OSTI]

    Guerra, Erick

    2010-01-01

    165. Too Much Riding on Climate Change? Wachs, M. , and J.Intergovernmental Panel on Climate Change 2000. IPCC SpecialToo Much Riding on Climate Change? By Erick Guerra Abstract

  10. Measure and Evaluate Institutional Change for Sustainability...

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

    Change for Sustainability Case Studies Resources on Institutional Change for Sustainability FEMP Contacts Hayes Jones U.S. Department of Energy 202-586-8873 Amy Wolfe...

  11. Institutional Change Process for Sustainability | Department...

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

    Process for Sustainability Institutional Change Process for Sustainability For establishing institutional change in a federal agency to achieve sustainability or other energy...

  12. Institutional Change for Sustainability | Department of Energy

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

    Institutional Change for Sustainability Institutional Change for Sustainability Motivate Staff to be More Sustainable Motivate Staff to be More Sustainable Learn how making public...

  13. Measure and Evaluate Institutional Change for Sustainability...

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

    Measure and Evaluate Institutional Change for Sustainability Measure and Evaluate Institutional Change for Sustainability Graphic showing 5 gears. They progress from Determine Goal...

  14. Assessing Climate Change Impacts, Vulnerability and Adaptation...

    Open Energy Info (EERE)

    Assessing Climate Change Impacts, Vulnerability and Adaptation: The Case of Pantabangan-Carranglan Watershed Jump to: navigation, search Name Assessing Climate Change Impacts,...

  15. 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 LAUNCH TOOL Name: Mainstreaming Climate Change...

  16. Observations: Oceanic Climate Change and Sea Level

    E-Print Network [OSTI]

    Talley, Lynne D.

    Changes ............. 402 5.4 Ocean Biogeochemical Changes ................... 403 5.4.1 Introduction ......................................................... 403 5.4.2 Carbon................................................................. 403 5.4.3 Oxygen

  17. Institutional Change Principles for Fostering Sustainability...

    Office of Environmental Management (EM)

    to achieve institutional change-but they are not the strategies themselves. They are derived from academic literature and inform the framework for achieving institutional change...

  18. Policy Context: Behaviour Change 1 | Forestry, sustainable behaviours and behaviour change: Policy context | 2012

    E-Print Network [OSTI]

    Policy Context: Behaviour Change 1 | Forestry, sustainable behaviours and behaviour change: Policy context | 2012 Policy context: influencing and changing behaviours1 Contents Policy context: influencing .............................................................................................3 3. Behaviour change in government policy

  19. Policy on change management 1 Current Revision: 12/2012 Policy on change management

    E-Print Network [OSTI]

    Hammack, Richard

    Documents VCU Technology Services Change Management System (httpPolicy on change management 1 Current Revision: 12/2012 Policy on change management Advancement Services manages and records all changes to applications and vendor systems supported

  20. 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 (OSTI)

    Perkins, Roy

    2013-06-21

    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.

  1. Design of the Front End Electronics for the Infrared Camera of JEM-EUSO, and manufacturing and verification of the prototype model

    E-Print Network [OSTI]

    Maroto, Oscar; Carbonell, Jordi; Toms, Albert; Reyes, Marcos; Joven, Enrique; Martn, Yolanda; Ros, J A Morales de los; Del Peral, Luis; Fras, M D Rodrguez

    2015-01-01

    The Japanese Experiment Module (JEM) Extreme Universe Space Observatory (EUSO) will be launched and attached to the Japanese module of the International Space Station (ISS). Its aim is to observe UV photon tracks produced by ultra-high energy cosmic rays developing in the atmosphere and producing extensive air showers. The key element of the instrument is a very wide-field, very fast, large-lense telescope that can detect extreme energy particles with energy above $10^{19}$ eV. The Atmospheric Monitoring System (AMS), comprising, among others, the Infrared Camera (IRCAM), which is the Spanish contribution, plays a fundamental role in the understanding of the atmospheric conditions in the Field of View (FoV) of the telescope. It is used to detect the temperature of clouds and to obtain the cloud coverage and cloud top altitude during the observation period of the JEM-EUSO main instrument. SENER is responsible for the preliminary design of the Front End Electronics (FEE) of the Infrared Camera, based on an unco...

  2. Dynamic distributions and changing copulas

    E-Print Network [OSTI]

    Harvey, Andrew C

    , the correlation is related to the quadrant association at #28; = 0:5 by the formula CQA(0:5; 0:5) = 0:5+ (1=#25;) arcsin #26;: Thus #26; = 0:75; corresponds to CQA(0:5; 0:5) = 0:77: Note that lower tail dependence is ( eCQA(#28; ; #28;)#0; 1 + 2#28;)=2#28; ; while... , the indicator variables need to be de?ned in terms of changing quantiles, #24;1t(#28; 1) and #24;2t(#28; 2): 2.6 Changing joint distributions For some purposes estimating the joint distribution rather than the copula may be what is required; see the discussion...

  3. Phase change material storage heater

    DOE Patents [OSTI]

    Goswami, D. Yogi (Gainesville, FL); Hsieh, Chung K. (Gainesville, FL); Jotshi, Chand K. (Gainesville, FL); Klausner, James F. (Gainesville, FL)

    1997-01-01

    A storage heater for storing heat and for heating a fluid, such as water, has an enclosure defining a chamber therein. The chamber has a lower portion and an upper portion with a heating element being disposed within the enclosure. A tube through which the fluid flows has an inlet and an outlet, both being disposed outside of the enclosure, and has a portion interconnecting the inlet and the outlet that passes through the enclosure. A densely packed bed of phase change material pellets is disposed within the enclosure and is surrounded by a viscous liquid, such as propylene glycol. The viscous liquid is in thermal communication with the heating element, the phase change material pellets, and the tube and transfers heat from the heating element to the pellets and from the pellets to the tube. The viscous fluid has a viscosity so that the frictional pressure drop of the fluid in contact with the phase change material pellets substantially reduces vertical thermal convection in the fluid. As the fluid flows through the tube heat is transferred from the viscous liquid to the fluid flowing through the tube, thereby heating the fluid.

  4. ARM - Engineering Change Request & Engineering Change Order Guidelines

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Comments? WeDatastreamstps DocumentationAtlanticENA Contacts ENA Related Links FacilitiesChange Request &

  5. Beijing ChangLi Union Energy Company | Open Energy Information

    Open Energy Info (EERE)

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

  6. IMPROVING CHANGE MANAGEMENT: HOW COMMUNICATION NATURE INFLUENCES

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    IMPROVING CHANGE MANAGEMENT: HOW COMMUNICATION NATURE INFLUENCES RESISTANCE TO CHANGE Paula Matos perform in time,practitioners may enhance guidelines to effective change communication management. It is requiring constant development of management science to deal with change processes. Impact and frequency

  7. EXECUTIVE MBA in Change Management and Leadership

    E-Print Network [OSTI]

    MBA EXECUTIVE MBA in Change Management and Leadership EXECUTIVE MBA IN CHANGE MANAGEMENT AND LEADERSHIP #12;WELCOME TO THE EXECUTIVE MBA IN CHANGE MANAGEMENT AND LEADERSHIP The globalization, the core of the program is as always change management and leadership. INVESTMENT IN YOUR

  8. The Environment and Directed Technical Change

    E-Print Network [OSTI]

    Acemoglu, Daron

    This paper introduces endogenous and directed technical change in a growth model with environmental

  9. Prospective Climate Change Impact on Large Rivers

    E-Print Network [OSTI]

    Julien, Pierre Y.

    1 Prospective Climate Change Impact on Large Rivers in the US and South Korea Pierre Y. Julien Dept. of Civil and Environ. Eng. Colorado State University Seoul, South Korea August 11, 2009 Climate Change and Large Rivers 1. Climatic changes have been on-going for some time; 2. Climate changes usually predict

  10. PART I THE POLICY CHALLENGES CLIMATE CHANGE

    E-Print Network [OSTI]

    #12;PART I THE POLICY CHALLENGES CLIMATE CHANGE JACCARD-RIVERS 10/29/07 3:48 PM Page 75 #12;77 THE POLICY CHALLENGE The litany of potential impacts associated with climate change is becoming familiar and dengue fever as a result of climate change. In addition to these and other gradual changes, scientists

  11. Climate Change: Implications for the PNW

    E-Print Network [OSTI]

    Brown, Sally

    #12;#12;Climate Change: Implications for the PNW Nick Bond University of Washington NOAA/PMEL #12;Projected Impacts of Climate Change Source: Stern Review #12;Global Climate Change Questions Is climate changing? What are greenhouse gases and do we understand their role in climate? What is the impact

  12. An iconic approach to representing climate change

    E-Print Network [OSTI]

    Feigon, Brooke

    1 An iconic approach to representing climate change Saffron Jessica O'Neill A thesis submitted-experts to be meaningfully engaged with the issue of climate change. This thesis investigates the value of engaging non-experts with climate change at the individual level. Research demonstrates that individuals perceive climate change

  13. Climate Change and Trout in Wisconsin Streams

    E-Print Network [OSTI]

    Sheridan, Jennifer

    Climate Change and Trout in Wisconsin Streams Photo Matt Mitro W John J. Magnuson Center Climate Change Fishes and Climate Change Adaptation Magnuson Photo #12;The Invisible Present The Invisible in Weather versus Climate Change Magnuson 2009 #12;Magnuson 2006 The Invisible Present The Invisible Place

  14. FIRE AND CLIMATE CHANGE IN CALIFORNIA

    E-Print Network [OSTI]

    FIRE AND CLIMATE CHANGE IN CALIFORNIA Changes in the Distribution and Frequency of Fire's California Climate Change Center JULY 2012 CEC5002012026 Prepared for: California Energy Commission to climate change has the potential to induce alteration of future fire activity. This research presents just

  15. Climate Change and Tourism Dr David Viner

    E-Print Network [OSTI]

    Feigon, Brooke

    Climate Change and Tourism CLAT Dr David Viner Climatic Research Unit University of East Anglia d.viner@uea.ac.uk Tourism has a strong international dimension and is sensitive to any changes of climate that alter to attract visitors are likely to be vulnerable to climate change and the implementation of climate change

  16. Changes in high cloud conditions

    E-Print Network [OSTI]

    Himebrook, Richard Frank

    1974-01-01

    of contrails, while in a more humid environment contrails wi. ll form. ilovis et al. (1970) showed that, over the 0. 68-2. 4p wavelength interval, "naturally" formed ice clouds and a fresh contrail show different signatures (which could be observed... prime cause for a change in the amount of high clouds, the Location of stations with respect to the jet routes was also reviewed. Atlanta, Ceorgia, was selected because it is a ma ~or air Lr r- minal and its upper-air liow advects jet...

  17. ARM - Climate Change Through History

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Comments? We would love to hear from you! Send us agovInstrumentswrf-chem Comments? We Outreach Home RoomChange

  18. 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 (OSTI)

    Schrijver, Carolus J.; Title, Alan M.; Aulanier, Guillaume; Pariat, Etienne; Delannee, Cecile E-mail: title@lmsal.com E-mail: etienne.pariat@obspm.fr

    2011-09-10

    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.

  19. Behavioral Change and Building Performance: Strategies for Significant...

    Office of Environmental Management (EM)

    Behavioral Change and Building Performance: Strategies for Significant, Persistent, and Measurable Institutional Change Behavioral Change and Building Performance: Strategies for...

  20. Mercury speciation driven by seasonal changes in a contaminated estuarine environment

    SciTech Connect (OSTI)

    Bratki?, Arne, E-mail: arne.bratkic@ijs.si [Department of Environmental Sciences, Joef Stefan Institute, Jamova 39, 1000 Ljubljana (Slovenia)] [Department of Environmental Sciences, Joef Stefan Institute, Jamova 39, 1000 Ljubljana (Slovenia); Ogrinc, Nives, E-mail: nives.orginc@ijs.si [Department of Environmental Sciences, Joef Stefan Institute, Jamova 39, 1000 Ljubljana (Slovenia)] [Department of Environmental Sciences, Joef Stefan Institute, Jamova 39, 1000 Ljubljana (Slovenia); Kotnik, Joe, E-mail: joze.kotnik@ijs.si [Department of Environmental Sciences, Joef Stefan Institute, Jamova 39, 1000 Ljubljana (Slovenia)] [Department of Environmental Sciences, Joef Stefan Institute, Jamova 39, 1000 Ljubljana (Slovenia); Faganeli, Jadran, E-mail: faganeli@mbss.org [Marine Biology Station, Forna?e 41, 6330 Piran (Slovenia)] [Marine Biology Station, Forna?e 41, 6330 Piran (Slovenia); agar, Duan, E-mail: dusan.zagar@fgg.uni-lj.si [Faculty of Civil and Geodetic Engineering, Jamova 2, 1000 Ljubljana (Slovenia)] [Faculty of Civil and Geodetic Engineering, Jamova 2, 1000 Ljubljana (Slovenia); Yano, Shinichiro [Faculty of Engineering, Kyushu University, Fukuoka 812-8581 (Japan)] [Faculty of Engineering, Kyushu University, Fukuoka 812-8581 (Japan); Tada, Akihide, E-mail: tada@civil.nagasaki-u.ac.jp [Faculty of Engineering, Nagasaki University, Bunkyo-machi 1-14, Nagasaki 852-8521 (Japan)] [Faculty of Engineering, Nagasaki University, Bunkyo-machi 1-14, Nagasaki 852-8521 (Japan); Horvat, Milena, E-mail: milena.horvat@ijs.si [Department of Environmental Sciences, Joef Stefan Institute, Jamova 39, 1000 Ljubljana (Slovenia)] [Department of Environmental Sciences, Joef Stefan Institute, Jamova 39, 1000 Ljubljana (Slovenia)

    2013-08-15

    In this study, seasonal changes of mercury (Hg) species in the highly variable estuary of So?a/Isonzo River (northern Adriatic Sea) were investigated. Samplings were performed on a seasonal basis (September 2009, May, August and October 2010) and Hg species (total Hg, methylmercury (MeHg), dissolved gaseous Hg (DGM)) in waters, sediments and pore waters were determined. In addition, a range of ancillary parameters were measured (salinity, nutrients, organic carbon (OC), nitrogen species). Hg values were interpreted using these parameters and hydrological conditions (river flow, wave height) around the time of sampling. There were no significant changes in Hg load from river to the gulf, compared to previous studies. The load was temporarily higher in May 2010 due to higher river flow. Wave height, through changing hydrostatic pressure, was most likely to cause resuspension of already deposited Hg from the bottom (August 2010). The estuary is a net source of DGM to the atmosphere as suggested by DGM profiles, with salinity, redox potential and organic matter as the most probable controls over its production. MeHg is produced in situ in sediment or in water column, rather than transported by river, as indicated by its correlation with OC of the marine origin. Calculated fluxes for THg and MeHg showed sediment as a source for both the water column. In pore waters, OC in part affects partitioning of both THg and MeHg; however other factors (e.g. sulphide and/or oxyhydroxides precipitation and dissolution) are also probably important. -- Highlights: ? Water, sediment and pore water mercury species in front of So?a River estuary were measured. ? Seasonally variable hydrological conditions were shown to influence water column Hg speciation. ? Fluxes for total Hg and MeHg from sediment to water were calculated. ? Sediment is a source of total Hg and MeHg to the water column. ? Correlation of MeHg with organic carbon of marine origin suggests in situ formation.